From b77663e14d6f8235d03cc1338f5f2a5491d2e0ad Mon Sep 17 00:00:00 2001
From: Padraig Gleeson
Date: Wed, 29 Jul 2026 11:09:28 +0100
Subject: [PATCH 1/9] Update v2 osb repos
---
libraries/client/cached_info/osb_gh.json | 2 +-
libraries/client/cached_info/repos_v2.json | 47 ++++++++++++++++++++--
libraries/client/loadosbv1.py | 2 +-
3 files changed, 46 insertions(+), 5 deletions(-)
diff --git a/libraries/client/cached_info/osb_gh.json b/libraries/client/cached_info/osb_gh.json
index a401656b..a29ab4f0 100644
--- a/libraries/client/cached_info/osb_gh.json
+++ b/libraries/client/cached_info/osb_gh.json
@@ -219507,7 +219507,7 @@
"private": false,
"pull_request_creation_policy": "all",
"pulls_url": "https://api.github.com/repos/OpenSourceBrain/OSBv2/pulls{/number}",
- "pushed_at": "2026-07-27T14:55:03Z",
+ "pushed_at": "2026-07-29T09:17:12Z",
"releases_url": "https://api.github.com/repos/OpenSourceBrain/OSBv2/releases{/id}",
"size": 62761,
"ssh_url": "git@github.com:OpenSourceBrain/OSBv2.git",
diff --git a/libraries/client/cached_info/repos_v2.json b/libraries/client/cached_info/repos_v2.json
index 7db5cff9..dff50b46 100644
--- a/libraries/client/cached_info/repos_v2.json
+++ b/libraries/client/cached_info/repos_v2.json
@@ -3,14 +3,14 @@
"content_types": {
"experimental": 459,
"experimental,modeling": 7,
- "modeling": 3184,
+ "modeling": 3185,
"modeling,experimental": 4
},
"repository_type": {
"biomodels": 1094,
"dandi": 451,
"figshare": 1,
- "github": 2108
+ "github": 2109
},
"user_repos": {
"0000-0002-4040-3141": 2,
@@ -29,7 +29,7 @@
"latavia.thompson@yale.edu": 1,
"leonardoguge": 1,
"matteo@metacell.us": 1,
- "osbadmin": 3564,
+ "osbadmin": 3565,
"padraig": 45,
"pat7": 1,
"pgl.eeson@gmail.com": 1,
@@ -193223,6 +193223,47 @@
"username": "sietse09"
},
"user_id": "00711324-c645-4a23-8f4b-6c54bde46a2f"
+ },
+ "3664": {
+ "auto_sync": true,
+ "content_types": "modeling",
+ "content_types_list": [
+ "modeling"
+ ],
+ "default_context": "development",
+ "id": 3664,
+ "name": "Golgi cell network Gurnani et al",
+ "repository_type": "github",
+ "summary": "Test",
+ "tags": [
+ {
+ "id": 671,
+ "tag": "Cerebellum"
+ },
+ {
+ "id": 672,
+ "tag": "Golgi cell"
+ },
+ {
+ "id": 316,
+ "tag": "OSBv1"
+ },
+ {
+ "id": 652,
+ "tag": "Rodent"
+ }
+ ],
+ "timestamp_created": "2026-07-29 10:06:59.916540+00:00",
+ "timestamp_updated": "---",
+ "uri": "https://github.com/sanjayankur31/GoC_Network_Sim_BehInputs",
+ "user": {
+ "email": "p.glee.s.on@gmail.com",
+ "first_name": "OSB",
+ "id": "7aafb661-2f39-4683-8f35-528de0752dd7",
+ "last_name": "Admin",
+ "username": "osbadmin"
+ },
+ "user_id": "7aafb661-2f39-4683-8f35-528de0752dd7"
}
}
}
\ No newline at end of file
diff --git a/libraries/client/loadosbv1.py b/libraries/client/loadosbv1.py
index 9bbadd92..aff871b3 100644
--- a/libraries/client/loadosbv1.py
+++ b/libraries/client/loadosbv1.py
@@ -39,7 +39,7 @@
index = 0
min_index = 0
-max_index = 100
+max_index = 1000
verbose = True
verbose = False
From 2bb7387bd32289a61f23289e70aef13dae033220 Mon Sep 17 00:00:00 2001
From: Padraig Gleeson
Date: Wed, 29 Jul 2026 11:20:21 +0100
Subject: [PATCH 2/9] osbv1 projects added to v2dev
---
libraries/client/cached_info/repos_v2dev.json | 191846 +--------------
libraries/client/loadosbv1.py | 2 +-
2 files changed, 3130 insertions(+), 188718 deletions(-)
diff --git a/libraries/client/cached_info/repos_v2dev.json b/libraries/client/cached_info/repos_v2dev.json
index 419cac08..543cb83d 100644
--- a/libraries/client/cached_info/repos_v2dev.json
+++ b/libraries/client/cached_info/repos_v2dev.json
@@ -1,191259 +1,5671 @@
{
"content_summary": {
"content_types": {
- "experimental": 471,
- "experimental,modeling": 4,
- "modeling": 3114,
+ "experimental": 1,
+ "experimental,modeling": 0,
+ "modeling": 115,
"modeling,experimental": 0
},
"repository_type": {
- "biomodels": 1095,
- "dandi": 453,
- "figshare": 1,
- "github": 2040
+ "biomodels": 0,
+ "dandi": 0,
+ "figshare": 0,
+ "github": 116
},
"user_repos": {
- "a": 19,
- "aigakira": 2,
- "ana\u00edsc\u00e3o": 1,
- "ankursinha": 2,
- "ca": 3,
- "gopal": 4,
- "nik": 1,
- "osbadmin": 3552,
- "padraig6": 1,
- "pgleeson": 2,
- "simao-osb": 2
+ "aaa": 1,
+ "osbadmin": 114,
+ "testpat3": 1
}
},
"repositories": {
"1": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 1,
- "name": "OSBv2_Showcase",
- "repository_type": "github",
- "summary": "",
- "tags": [
- {
- "id": 1,
- "tag": "tutorial"
- },
- {
- "id": 2,
- "tag": "neuroml"
- },
- {
- "id": 3,
- "tag": "osbv2"
- },
- {
- "id": 4,
- "tag": "nwb"
- },
- {
- "id": 5,
- "tag": "netpyne"
- }
- ],
- "thumbnail": "repositories/1/thumbnail.bin",
- "timestamp_created": "2022-12-16 08:42:26.503809+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/OSBv2_Showcase",
- "user": {
- "email": "filippo+8@metacell.us",
- "first_name": "Filippo",
- "id": "a2514035-c47f-4d8a-b22b-081d91a5ce6b",
- "last_name": "Ledda",
- "username": "a"
- },
- "user_id": "a2514035-c47f-4d8a-b22b-081d91a5ce6b"
- },
- "2": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "0.220708.1652",
- "id": 2,
- "name": "UHN whole-cell patch-clamp excitability recordings from human cortical neurons",
- "repository_type": "dandi",
- "summary": "Whole-cell patch clamp recordings from surgically resected human cortical tissue.",
- "tags": [
- {
- "id": 6,
- "tag": "excitability"
- },
- {
- "id": 7,
- "tag": "human"
- },
- {
- "id": 8,
- "tag": "cortex"
- },
- {
- "id": 326,
- "tag": "DANDI:000293"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 262,
- "tag": "Homo sapiens - Human"
- }
- ],
- "timestamp_created": "2022-12-16 08:43:13.310387+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000293/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "5": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "draft",
- "id": 5,
- "name": "Electrophysiological properties of adult mouse spinal cord neurons - 22Q1_Ephys_DANDI",
- "repository_type": "dandi",
- "summary": "Whole-cell patch clamp recording of specific cell types in the adult mouse spinal cord. Neurons are either input defined, output defined or expressing specific molecular markers. ",
- "tags": [
- {
- "id": 319,
- "tag": "DANDI:000245"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 194,
- "tag": "Mus musculus - House mouse"
- }
- ],
- "timestamp_created": "2023-01-17 11:48:59.537288+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000245/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "6": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "main",
- "id": 6,
- "name": "OSBv2_Showcase salam",
- "repository_type": "github",
- "summary": "",
- "tags": [
- {
- "id": 1,
- "tag": "tutorial"
- },
- {
- "id": 2,
- "tag": "neuroml"
- },
- {
- "id": 3,
- "tag": "osbv2"
- },
- {
- "id": 4,
- "tag": "nwb"
- },
- {
- "id": 5,
- "tag": "netpyne"
- }
- ],
- "timestamp_created": "2023-01-17 11:50:23.873011+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/OSBv2_Showcase",
- "user": {
- "email": "filippo+8@metacell.us",
- "first_name": "Filippo",
- "id": "a2514035-c47f-4d8a-b22b-081d91a5ce6b",
- "last_name": "Ledda",
- "username": "a"
- },
- "user_id": "a2514035-c47f-4d8a-b22b-081d91a5ce6b"
- },
- "7": {
- "auto_sync": true,
- "content_types": "experimental,modeling",
- "content_types_list": [
- "experimental",
- "modeling"
- ],
- "default_context": "development",
- "id": 7,
- "name": "OSBv2_Showcase mnmn",
- "repository_type": "github",
- "summary": "mnmnknknknk",
- "tags": [
- {
- "id": 1,
- "tag": "tutorial"
- },
- {
- "id": 2,
- "tag": "neuroml"
- },
- {
- "id": 3,
- "tag": "osbv2"
- },
- {
- "id": 4,
- "tag": "nwb"
- },
- {
- "id": 5,
- "tag": "netpyne"
- }
- ],
- "timestamp_created": "2023-01-17 13:38:29.362115+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/OSBv2_Showcase",
- "user": {
- "email": "filippo+8@metacell.us",
- "first_name": "Filippo",
- "id": "a2514035-c47f-4d8a-b22b-081d91a5ce6b",
- "last_name": "Ledda",
- "username": "a"
- },
- "user_id": "a2514035-c47f-4d8a-b22b-081d91a5ce6b"
- },
- "8": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "main",
- "id": 8,
- "name": "OSBv2_Showcase",
- "repository_type": "github",
- "summary": "",
- "tags": [
- {
- "id": 1,
- "tag": "tutorial"
- },
- {
- "id": 2,
- "tag": "neuroml"
- },
- {
- "id": 3,
- "tag": "osbv2"
- },
- {
- "id": 4,
- "tag": "nwb"
- },
- {
- "id": 5,
- "tag": "netpyne"
- }
- ],
- "timestamp_created": "2023-01-17 13:42:33.863628+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/OSBv2_Showcase",
- "user": {
- "email": "filippo+8@metacell.us",
- "first_name": "Filippo",
- "id": "a2514035-c47f-4d8a-b22b-081d91a5ce6b",
- "last_name": "Ledda",
- "username": "a"
- },
- "user_id": "a2514035-c47f-4d8a-b22b-081d91a5ce6b"
- },
- "9": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "main",
- "id": 9,
- "name": "OSBv2_Showcase mnmnl,l,",
- "repository_type": "github",
- "summary": "",
- "tags": [
- {
- "id": 1,
- "tag": "tutorial"
- },
- {
- "id": 2,
- "tag": "neuroml"
- },
- {
- "id": 3,
- "tag": "osbv2"
- },
- {
- "id": 4,
- "tag": "nwb"
- },
- {
- "id": 5,
- "tag": "netpyne"
- }
- ],
- "timestamp_created": "2023-01-17 13:44:11.573113+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/OSBv2_Showcase",
- "user": {
- "email": "filippo+8@metacell.us",
- "first_name": "Filippo",
- "id": "a2514035-c47f-4d8a-b22b-081d91a5ce6b",
- "last_name": "Ledda",
- "username": "a"
- },
- "user_id": "a2514035-c47f-4d8a-b22b-081d91a5ce6b"
- },
- "14": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "main",
- "id": 14,
- "name": "OSBv2_Showcase",
- "repository_type": "github",
- "summary": "",
- "tags": [
- {
- "id": 1,
- "tag": "tutorial"
- },
- {
- "id": 2,
- "tag": "neuroml"
- },
- {
- "id": 3,
- "tag": "osbv2"
- },
- {
- "id": 4,
- "tag": "nwb"
- },
- {
- "id": 5,
- "tag": "netpyne"
- }
- ],
- "timestamp_created": "2023-01-18 07:48:28.279114+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/OSBv2_Showcase",
- "user": {
- "email": "filippo+8@metacell.us",
- "first_name": "Filippo",
- "id": "a2514035-c47f-4d8a-b22b-081d91a5ce6b",
- "last_name": "Ledda",
- "username": "a"
- },
- "user_id": "a2514035-c47f-4d8a-b22b-081d91a5ce6b"
- },
- "15": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 15,
- "name": "OSBv2_Showcase test refresh",
- "repository_type": "github",
- "summary": "",
- "tags": [
- {
- "id": 1,
- "tag": "tutorial"
- },
- {
- "id": 2,
- "tag": "neuroml"
- },
- {
- "id": 3,
- "tag": "osbv2"
- },
- {
- "id": 4,
- "tag": "nwb"
- },
- {
- "id": 5,
- "tag": "netpyne"
- }
- ],
- "timestamp_created": "2023-01-18 07:49:01.127691+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/OSBv2_Showcase",
- "user": {
- "email": "filippo+8@metacell.us",
- "first_name": "Filippo",
- "id": "a2514035-c47f-4d8a-b22b-081d91a5ce6b",
- "last_name": "Ledda",
- "username": "a"
- },
- "user_id": "a2514035-c47f-4d8a-b22b-081d91a5ce6b"
- },
- "16": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "main",
- "id": 16,
- "name": "OSBv2_Showcase test refresh 2",
- "repository_type": "github",
- "summary": "",
- "tags": [
- {
- "id": 1,
- "tag": "tutorial"
- },
- {
- "id": 2,
- "tag": "neuroml"
- },
- {
- "id": 3,
- "tag": "osbv2"
- },
- {
- "id": 4,
- "tag": "nwb"
- },
- {
- "id": 5,
- "tag": "netpyne"
- }
- ],
- "timestamp_created": "2023-01-18 07:50:37.309026+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/OSBv2_Showcase",
- "user": {
- "email": "filippo+8@metacell.us",
- "first_name": "Filippo",
- "id": "a2514035-c47f-4d8a-b22b-081d91a5ce6b",
- "last_name": "Ledda",
- "username": "a"
- },
- "user_id": "a2514035-c47f-4d8a-b22b-081d91a5ce6b"
- },
- "17": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "main",
- "id": 17,
- "name": "OSBv2_Showcasek ",
- "repository_type": "github",
- "summary": "",
- "tags": [
- {
- "id": 1,
- "tag": "tutorial"
- },
- {
- "id": 2,
- "tag": "neuroml"
- },
- {
- "id": 3,
- "tag": "osbv2"
- },
- {
- "id": 4,
- "tag": "nwb"
- },
- {
- "id": 5,
- "tag": "netpyne"
- }
- ],
- "timestamp_created": "2023-01-18 08:27:04.739494+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/OSBv2_Showcase",
- "user": {
- "email": "filippo+8@metacell.us",
- "first_name": "Filippo",
- "id": "a2514035-c47f-4d8a-b22b-081d91a5ce6b",
- "last_name": "Ledda",
- "username": "a"
- },
- "user_id": "a2514035-c47f-4d8a-b22b-081d91a5ce6b"
- },
- "18": {
- "auto_sync": true,
- "content_types": "experimental,modeling",
- "content_types_list": [
- "experimental",
- "modeling"
- ],
- "default_context": "main",
- "id": 18,
- "name": "OSBv2_Showcase kdj",
- "repository_type": "github",
- "summary": "",
- "tags": [
- {
- "id": 1,
- "tag": "tutorial"
- },
- {
- "id": 2,
- "tag": "neuroml"
- },
- {
- "id": 3,
- "tag": "osbv2"
- },
- {
- "id": 4,
- "tag": "nwb"
- },
- {
- "id": 5,
- "tag": "netpyne"
- }
- ],
- "timestamp_created": "2023-01-18 08:27:47.620821+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/OSBv2_Showcase",
- "user": {
- "email": "filippo+8@metacell.us",
- "first_name": "Filippo",
- "id": "a2514035-c47f-4d8a-b22b-081d91a5ce6b",
- "last_name": "Ledda",
- "username": "a"
- },
- "user_id": "a2514035-c47f-4d8a-b22b-081d91a5ce6b"
- },
- "19": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "master",
- "id": 19,
- "name": "nwb-explorer",
- "repository_type": "github",
- "summary": "",
- "tags": [
- {
- "id": 5,
- "tag": "netpyne"
- }
- ],
- "timestamp_created": "2023-01-18 08:59:08.305329+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/MetaCell/nwb-explorer",
- "user": {
- "email": "filippo+8@metacell.us",
- "first_name": "Filippo",
- "id": "a2514035-c47f-4d8a-b22b-081d91a5ce6b",
- "last_name": "Ledda",
- "username": "a"
- },
- "user_id": "a2514035-c47f-4d8a-b22b-081d91a5ce6b"
- },
- "20": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "nfs",
- "id": 20,
- "name": "cloud-harness",
- "repository_type": "github",
- "summary": "",
- "tags": [],
- "timestamp_created": "2023-01-18 09:30:23.925749+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/MetaCell/cloud-harness",
- "user": {
- "email": "filippo+8@metacell.us",
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- "timestamp_created": "2023-02-16 09:19:29.045161+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000012/draft",
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- "name": "Low-noise encoding of active touch by layer 4 in the somatosensory cortex",
- "repository_type": "dandi",
- "summary": "Data from \"Low-noise encoding of active touch by layer 4 in the somatosensory cortex\" Hires, Gutnisky et al. Elife 2015",
- "tags": [
- {
- "id": 195,
- "tag": "DANDI:000013"
- },
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- "id": 181,
- "tag": "DANDI"
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- {
- "id": 24,
- "tag": "NWB"
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- "id": 193,
- "tag": "House mouse"
- }
- ],
- "timestamp_created": "2023-02-16 09:19:36.872738+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000013/draft",
- "user": {
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- "name": "A Map of Anticipatory Activity in Mouse Motor Cortex",
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- "summary": "Data from \"A Map of Anticipatory Activity in Mouse Motor Cortex\" Chen et al. Neuron 2017",
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- "id": 196,
- "tag": "DANDI:000015"
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- "id": 24,
- "tag": "NWB"
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- "id": 193,
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- "timestamp_created": "2023-02-16 09:19:39.628271+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000015/draft",
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- "name": "Excitatory and inhibitory subnetworks are equally selective during decision-making and emerge simultaneously during learning",
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- "summary": "This package contains data, in NWB (Neurodata Without Borders) format, from the 4 mice included in \"Najafi, Farzaneh, Gamaleldin F. Elsayed, Robin Cao, Eftychios Pnevmatikakis, Peter E. Latham, John P. Cunningham, and Anne K. Churchland. \"Excitatory and inhibitory subnetworks are equally selective during decision-making and emerge simultaneously during learning.\" Neuron 105, no. 1 (2020): 165-179.\u201d Each NWB file represents the data and metadata associated with one recording session. In each NWB file, the metadata related to the session (mouse name, session date/time, lab/institution name, etc.) can be found under \"general\". Information related to ROI-segmentation such as ROI mask, ROI type (excitatory or inhibitory), poor or good quality, etc. can be found under \"modules/Image-Segmentation/pln-seg\". Trial information (e.g. start, end times, trial types, trial outcomes, etc.) can be found under \"trials\". Recorded trial-segmented neuronal responses aligned to different time event (e.g. stimulus start, animal choice, etc.) can be found under \"modules/ Trial-based-Segmentation\". A jupyter notebook presenting in detail how to work with NWB files is provided at https://github.com/ttngu207/najafi-2018-nwb/blob/master/notebooks/Najafi-2018_example.ipynb.",
- "tags": [
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- "id": 197,
- "tag": "DANDI:000016"
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- "timestamp_created": "2023-02-16 09:19:48.465132+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000016/draft",
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- "name": "Distributed coding of choice, action and engagement across the mouse brain",
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- "summary": "Data from \"Distributed coding of choice, action and engagement across the mouse brain\" Steinmetz et. al Nature 2019",
- "tags": [
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- "id": 30,
- "tag": "neuropixels"
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- "id": 198,
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- "id": 24,
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- "timestamp_created": "2023-02-16 09:19:49.743090+00:00",
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- "name": "Human ECoG speaking consonant-vowel syllables",
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- "summary": "The enclosed data is collected using a high-density 256-channel electrocorticography (ECoG) array implanted in human patients during treatment for epilepsy. The subjects are reading aloud consonant-vowel syllables from a list. The data was collected by Dr. Edward Chang and Dr. Kristofer Bouchard at the University of California, San Francisco, and curated by Dr. Kristofer Bouchard and Dr. Benjamin Dichter.\n\n\nData is organized by subject ID, and each file is a continuous recording session in Neurodata Without Borders (NWB) 2.0 format. Voltage traces are included for each of the recorded 256 channels. Microphone signal was recorded at the time but is removed for HIPAA compliance. Detailed hand-marked annotations are provided which mark what syllable was said, and the times of the start, consonant-vowel transition, and end of each syllable. A rest-period time is also included when the subject was silent, which can be used as a baseline. Hand-marked anatomical labels are included for electrodes in the relevant brain regions. All dates have been removed for HIPAA compliance and replaced with Jan 1, 1900.",
- "tags": [
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- "id": 31,
- "tag": "electrocorticography (ECoG)"
- },
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- "id": 32,
- "tag": "speech production"
- },
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- "id": 199,
- "tag": "DANDI:000019"
- },
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- "id": 181,
- "tag": "DANDI"
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- "id": 24,
- "tag": "NWB"
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- "id": 77,
- "tag": "Human"
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- "timestamp_created": "2023-02-16 09:19:50.974579+00:00",
- "timestamp_updated": "---",
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- "id": 50,
- "name": "Patch-seq recordings from mouse visual cortex",
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- "summary": "Whole-cell Patch-seq recordings from neurons of the mouse visual cortex from the Allen Institute for Brain Science, released in June 2020. The majority of cells in this dataset are GABAergic interneurons, but there are also a small number of glutamatergic neurons from layer 2/3 of the mouse visual cortex.",
- "tags": [
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- "id": 27,
- "tag": "Patch-seq"
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- "id": 29,
- "tag": "mouse"
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- "tag": "visual cortex"
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- "id": 34,
- "tag": "interneuron"
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- "id": 200,
- "tag": "DANDI:000020"
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- "id": 181,
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- "id": 24,
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- "timestamp_created": "2023-02-16 09:19:52.885831+00:00",
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- "name": "20191003_AIBS_mouse_ecephys_brain_observatory_1_1",
- "repository_type": "dandi",
- "summary": "Allen Institute October 2019 Mouse extracellular electrophysiology data approximately matching two-photon brain observatory stimulus set. \n\nFor more information, see https://portal.brain-map.org/explore/circuits/visual-coding-neuropixels\n\nData are subject to Allen Institute terms of use, available at: http://www.alleninstitute.org/legal/terms-use/",
- "tags": [
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- "id": 35,
- "tag": "electrophysiology"
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- "tag": "life sciences"
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- "tag": "machine learning"
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- "tag": "neurobiology"
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- "tag": "signal processing"
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- "tag": "DANDI:000021"
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- "id": 181,
- "tag": "DANDI"
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- "id": 24,
- "tag": "NWB"
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- "id": 193,
- "tag": "House mouse"
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- "timestamp_created": "2023-02-16 09:19:54.098887+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000021/draft",
- "user": {
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- "default_context": "draft",
- "id": 52,
- "name": "20191003_AIBS_mouse_ecephys_functional_connectivity",
- "repository_type": "dandi",
- "summary": "Allen Institute October 2019 Mouse extracellular electrophysiology data, collected under analogous conditions to the two-photon Brain Observatory imaging experiments, with mice shown a subset of stimuli with a higher number of repeats. \n\nFor more information, see https://portal.brain-map.org/explore/circuits/visual-coding-neuropixels\n\nData are subject to Allen Institute Terms of Use policy, available at: http://www.alleninstitute.org/legal/terms-use/\n",
- "tags": [
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- "id": 35,
- "tag": "electrophysiology"
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- "tag": "life sciences"
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- "tag": "machine learning"
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- "tag": "neurobiology"
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- "tag": "signal processing"
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- "id": 24,
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- "timestamp_created": "2023-02-16 09:19:55.349426+00:00",
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- "id": 53,
- "name": "Patch-seq recordings from human cortex (June 2020)",
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- "summary": "Whole-cell Patch-seq recordings from neurons of the human neocortex from the Allen Institute for Brain Science, released in June 2020.",
- "tags": [
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- "id": 27,
- "tag": "Patch-seq"
- },
- {
- "id": 7,
- "tag": "human"
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- "id": 40,
- "tag": "neocortex"
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- "id": 203,
- "tag": "DANDI:000023"
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- "id": 181,
- "tag": "DANDI"
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- "id": 24,
- "tag": "NWB"
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- "id": 77,
- "tag": "Human"
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- "id": 286,
- "tag": "layer 2/3"
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- "timestamp_created": "2023-02-16 09:19:56.683686+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000023/draft",
- "user": {
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- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "default_context": "draft",
- "id": 54,
- "name": "Example intracellular ephys data from LNMC & BBP",
- "repository_type": "dandi",
- "summary": "This is a single session showing example intracellular electrophysiology data collected at the Laboratory of Neural Microcircuitry, EPFL. This session holds a variety of different stimulation patterns. \n\nIt also serves as an example of the hierarchy of metadata tables (/general/intracellular_ephys/) and groups (/data_organization) storing sweeps of a complex experimental protocol.\n\nLoad this file in pynwb with load_namespaces = True.\n",
- "tags": [
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- "id": 204,
- "tag": "DANDI:000025"
- },
- {
- "id": 181,
- "tag": "DANDI"
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- {
- "id": 24,
- "tag": "NWB"
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- "id": 205,
- "tag": "Rattus norvegicus - Norway rat"
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- "timestamp_created": "2023-02-16 09:19:57.941421+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000025/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "id": 55,
- "name": "Human brain cell census for BA 44/45",
- "repository_type": "dandi",
- "summary": "Magnetic resonance imaging (MRI) is used to establish a macroscopic reference coordinate system of laminar and cytoarchitectural boundaries. Cell counting is obtained with both traditional immunohistochemistry, to provide a stereological gold standard, and with a custom-made inverted confocal light-sheet fluorescence microscope (LSM) for 3D imaging at cellular resolution. Finally, polarization-sensitive optical coherence tomography (PSOCT) enables registration of the distorted histological cell typing obtained with LSM to the MRI-based atlas coordinate system.",
- "tags": [
- {
- "id": 42,
- "tag": "multi-modal imaging"
- },
- {
- "id": 43,
- "tag": "MRI"
- },
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- "id": 44,
- "tag": "OCT"
- },
- {
- "id": 45,
- "tag": "SPIM"
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- {
- "id": 46,
- "tag": "human cortex"
- },
- {
- "id": 47,
- "tag": "Broca's area"
- },
- {
- "id": 48,
- "tag": "Motor cortex"
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- "id": 49,
- "tag": "Stereology"
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- "id": 206,
- "tag": "DANDI:000026"
- },
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- "id": 181,
- "tag": "DANDI"
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- "timestamp_created": "2023-02-16 09:20:01.372666+00:00",
- "timestamp_updated": "---",
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- "content_types": "experimental",
- "content_types_list": [
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- "default_context": "0.210831.2033",
- "id": 56,
- "name": "Test dataset for testing dandi-cli.",
- "repository_type": "dandi",
- "summary": "Should be ignored by regular mortals.\n\nATM contains only a few files from http://github.com/dandi-datasets/nwb_test_data which more or less appropriate (do not lack critical metadata) for testing",
- "tags": [
- {
- "id": 50,
- "tag": "development"
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- {
- "id": 207,
- "tag": "DANDI:000027"
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- "id": 181,
- "tag": "DANDI"
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- "id": 24,
- "tag": "NWB"
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- "id": 205,
- "tag": "Rattus norvegicus - Norway rat"
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- "timestamp_created": "2023-02-16 09:20:02.723903+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000027/draft",
- "user": {
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- "first_name": "OSB",
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- "last_name": "Admin",
- "username": "osbadmin"
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- "default_context": "draft",
- "id": 57,
- "name": "Simulated cortical Neuropixels recording with ground truth",
- "repository_type": "dandi",
- "summary": "A 10 minute Neuropixels recording simulated using the MEArec Python package (Buccino et al., 2020). The recording contains the spiking activity of 250 biophysically detailed neurons (200 excitatory and 50 inhibitory cells from the Neocortical Micro Circuit Portal with independent Poisson firing patterns, and additive Gaussian noise with 10uV standard deviation.",
- "tags": [
- {
- "id": 208,
- "tag": "DANDI:000028"
- },
- {
- "id": 181,
- "tag": "DANDI"
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- {
- "id": 24,
- "tag": "NWB"
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- {
- "id": 193,
- "tag": "House mouse"
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- ],
- "timestamp_created": "2023-02-16 09:20:04.006007+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000028/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "content_types_list": [
- "experimental"
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- "id": 58,
- "name": "Test dataset for development purposes",
- "repository_type": "dandi",
- "summary": "Should be ignored by regular mojgjhhj. fjrtalddgdfgdfgs, and not relied upon being static or ever correct.\n\u0414\u043e\u043b\u0436\u043d\u043e \u0431\u044b\u0442\u044c \u0432\u0432\u0435\u0434\u0435\u043d\u043e \u043d\u0430 \u0410\u043d\u0433\u043b\u0438\u0439\u0441\u043a\u043e\u043c, \u043d\u043e \u043f\u043e\u0447\u0435\u043c\u0443 \u0431\u044b \u043d\u0430\u043c \u043d\u0435 \u043f\u0440\u043e\u0432\u0435\u0440\u0438\u0442\u044c \u0432\u0441\u044e \u044d\u0442\u0443 \u043a\u0443\u0445\u043d\u044e \n\u0394\u0419\u05e7\u0645\u0e57\u3042\nabcdefghi",
- "tags": [
- {
- "id": 50,
- "tag": "development"
- },
- {
- "id": 209,
- "tag": "DANDI:000029"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 210,
- "tag": "Macaca mulatta - Rhesus monkey"
- }
- ],
- "timestamp_created": "2023-02-16 09:20:05.356536+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000029/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "59": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "0.211030.0713",
- "id": 59,
- "name": "SpikeInterface, a unified framework for spike sorting",
- "repository_type": "dandi",
- "summary": "SpikeInterface is a Python framework designed to make the analysis of extracellular electrophysiology data more accessible and standardized. The SpikeInterface documentation can be found at https://spikeinterface.readthedocs.io/en/latest/.\n\nThis dataset contains all recordings analysed in the paper: \"SpikeInterface, a unified framework for spike sorting.\" Alessio P. Buccino, Cole L. Hurwitz, Samuel Garcia, Jeremy Magland, Joshua H. Siegle, Roger Hurwitz, Matthias H. Hennig, eLife - doi: https://doi.org/10.7554/eLife.61834; ",
- "tags": [
- {
- "id": 51,
- "tag": "Spike Sorting"
- },
- {
- "id": 52,
- "tag": "extracellular electrophysiology"
- },
- {
- "id": 211,
- "tag": "DANDI:000034"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 193,
- "tag": "House mouse"
- }
- ],
- "timestamp_created": "2023-02-16 09:20:06.624265+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000034/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "60": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "0.211014.0808",
- "id": 60,
- "name": "Temperature-controlled intracellular Patch-seq recordings in mouse motor cortex",
- "repository_type": "dandi",
- "summary": " We used Patch-seq to combine patch-clamp recording, biocytin staining, and single-cell RNA sequencing of over 1300 neurons in adult mouse motor cortex, providing a comprehensive morpho-electric annotation of almost all transcriptomically defined neural cell types. This dataset contains rectangular stimulation of cells under temperature-controlled conditions (34 \u2103). See Dandiset #8 for the main dataset, recorded under the room temperature.",
- "tags": [
- {
- "id": 27,
- "tag": "Patch-seq"
- },
- {
- "id": 29,
- "tag": "mouse"
- },
- {
- "id": 8,
- "tag": "cortex"
- },
- {
- "id": 28,
- "tag": "motor cortex"
- },
- {
- "id": 212,
- "tag": "DANDI:000035"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 193,
- "tag": "House mouse"
- }
- ],
- "timestamp_created": "2023-02-16 09:20:07.951830+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000035/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "61": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "0.230515.1917",
- "id": 61,
- "name": "Allen Institute Openscope - Measuring Stimulus-Evoked Neurophysiological Differentiation in Distinct Populations of Neurons in Mouse Visual Cortex",
- "repository_type": "dandi",
- "summary": "Despite significant progress in understanding neural coding, it remains unclear how the coordinated activity of large populations of neurons relates to what an observer actually perceives. Since neurophysiological differences must underlie differences among percepts, differentiation analysis-quantifying distinct patterns of neurophysiological activity-has been proposed as an \"inside-out\" approach that addresses this question. This methodology contrasts with \"outside-in\" approaches such as feature tuning and decoding analyses, which are defined in terms of extrinsic experimental variables. Here, we used two-photon calcium imaging in mice of both sexes to systematically survey stimulus-evoked neurophysiological differentiation (ND) in excitatory neuronal populations in layers (L)2/3, L4, and L5 across five visual cortical areas (primary, lateromedial, anterolateral, posteromedial, and anteromedial) in response to naturalistic and phase-scrambled movie stimuli. We find that unscrambled stimuli evoke greater ND than scrambled stimuli specifically in L2/3 of the anterolateral and anteromedial areas, and that this effect is modulated by arousal state and locomotion. By contrast, decoding performance was far above chance and did not vary substantially across areas and layers. Differentiation also differed within the unscrambled stimulus set, suggesting that differentiation analysis may be used to probe the ethological relevance of individual stimuli.\n\nFor more details, consult the associated publication : https://doi.org/10.1523/eneuro.0280-21.2021",
- "tags": [
- {
- "id": 53,
- "tag": "two photon imaging"
- },
- {
- "id": 54,
- "tag": "visual stimuli"
- },
- {
- "id": 55,
- "tag": "mice"
- },
- {
- "id": 56,
- "tag": "openscope"
- },
- {
- "id": 213,
- "tag": "DANDI:000036"
- },
- {
- "id": 181,
- "tag": "DANDI"
- }
- ],
- "timestamp_created": "2023-02-16 09:20:09.212509+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000036/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "62": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "0.240209.1623",
- "id": 62,
- "name": "Allen Institute Openscope - Responses to inconsistent stimuli in somata and distal apical dendrites in primary visual cortex",
- "repository_type": "dandi",
- "summary": "This dataset was collected for the Credit Assignment project, as part of the Allen Institute for Brain Science's OpenScope project. The most up-to-date links to the publications associated with this dataset (a dataset descriptor paper and an analysis paper) can be found by going to the metadata Github repository, linked below.\n\nBriefly, mice were habituated to head-fixation on a running disc over a period of 11 days. Over the last 6 days, mice were presented with repeating stimulus sequences, with consistent features. These sessions are not included in the dataset, as imaging was not performed. Following habituation, sequences with inconsistent features were introduced over three sessions, while two-photon calcium imaging was performed in pyramidal neurons of primary visual cortex (VisP). Specifically, recordings for each mouse were made in one of four planes: L2/3 somata, L5 somata, L2/3 distal apical dendrites or L5 distal apical dendrites. As mice gained experience with the inconsistent sequences, responses to these events were found to evolve in opposite ways in the dendritic and somatic compartments.\n\nThe dataset includes 50 sessions total, recorded in 13 subjects, with at least 3 sessions per subject. Each session file includes: **(1)** ROI dF/F traces, **(2)** ROI masks, **(3)** ROI tracking information (where applicable), **(4)** running velocity traces, **(5)** pupil diameter traces, **(6)** pupil centroid position traces in x and y, **(7)** stimulus parameters. Note that gaze was not computed for this dataset. What is provided is the position of the pupil centroid in the pupil recording videos. In addition, a second, slightly larger version of each file was created, also including: **(8)** stimulus frame images (identifiable by `+image` in the file name). Lastly, a third, much larger version of each file was created, also including: **(9)** the motion corrected imaging stack (identifiable by `_obj-raw` in the file name).\n\nCertain sessions in this dataset were excluded from our analyses for quality control reasons. They are provided here, as the reasons we excluded them from our analyses may not pose a problem for all use cases. The metadata Github repository, linked below, provides detailed information about each session. \n\nRelease notes for each version of the dataset are provided in the CHANGES file.",
- "tags": [
- {
- "id": 57,
- "tag": "learning"
- },
- {
- "id": 40,
- "tag": "neocortex"
- },
- {
- "id": 58,
- "tag": "pyramidal neurons"
- },
- {
- "id": 59,
- "tag": "distal apical dendrites"
- },
- {
- "id": 60,
- "tag": "somata"
- },
- {
- "id": 61,
- "tag": "L2/3"
- },
- {
- "id": 62,
- "tag": "L5"
- },
- {
- "id": 63,
- "tag": "two-photon calcium imaging"
- },
- {
- "id": 64,
- "tag": "mouse VisP"
- },
- {
- "id": 65,
- "tag": "prediction"
- },
- {
- "id": 66,
- "tag": "credit assignment"
- },
- {
- "id": 214,
- "tag": "DANDI:000037"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 194,
- "tag": "Mus musculus - House mouse"
- }
- ],
- "timestamp_created": "2023-02-16 09:20:10.537814+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000037/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "63": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "0.230223.1216",
- "id": 63,
- "name": "Allen Institute \u2013 Contrast tuning in mouse visual cortex with calcium imaging",
- "repository_type": "dandi",
- "summary": "A two photon calcium imaging dataset from Allen Institute measuring responses to full-field drifting gratings (approx. 120x90 degrees of visual space) of 8 directions and 6 contrasts (5%, 10%, 20%, 40%, 60%, 80%). Mouse Cre lines expressing GCaMP6f were imaged to record responses of pyramidal neurons across cortical layers (Cux2: layer 2/3; Rorb: layer 4; Rbp4: layer 5; Ntsr1: layer 6) as well as inhibitory interneurons (Vip and Sst). All experimental sessions took place on the same data collection pipeline as the Allen Brain Observatory (see http://observatory.brain-map.org/visualcoding) and have the same visual stimulus monitor calibration and positioning, two photon imaging systems and image processing pipeline, and running wheel to track locomotion.\n\n Data are subject to Allen Institute Terms of Use policy, available at: http://www.alleninstitute.org/legal/terms-use/",
- "tags": [
- {
- "id": 67,
- "tag": "vision"
- },
- {
- "id": 33,
- "tag": "visual cortex"
- },
- {
- "id": 68,
- "tag": "inhibition"
- },
- {
- "id": 69,
- "tag": "inhibitory circuits"
- },
- {
- "id": 70,
- "tag": "circuit dynamics"
- },
- {
- "id": 71,
- "tag": "gain control"
- },
- {
- "id": 215,
- "tag": "DANDI:000039"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 193,
- "tag": "House mouse"
- }
- ],
- "timestamp_created": "2023-02-16 09:20:11.964425+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000039/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "64": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "0.250624.0419",
- "id": 64,
- "name": "Network Homeostasis and State Dynamics of Neocortical Sleep",
- "repository_type": "dandi",
- "summary": "Data was recorded using silicon probe electrodes in the frontal cortices of male Long Evans rats between 4-7 months of age. The design was to have no specific behavior, task or stimulus, rather the animal was left alone in it\u2019s home cage (which it lives in at all\ntimes). Data includes both local field potentials (LFP) and spikes. 11 total animals, 27 recording sessions, 1360 total units recorded, 1121 units considered stable, 995 putative excitatory units and 126 putative inhibitory units. Only recordings including a \u201cWAKE-SLEEP\u201d episode wherein at least 7 minutes of wake are followed by 20 minutes of sleep. On average 2 such WAKE-SLEEP episodes per recording session. ",
- "tags": [
- {
- "id": 72,
- "tag": "Firing patterns"
- },
- {
- "id": 73,
- "tag": "Sleep/awake states"
- },
- {
- "id": 74,
- "tag": "Sleep stages"
- },
- {
- "id": 75,
- "tag": "Homeostasis"
- },
- {
- "id": 216,
- "tag": "DANDI:000041"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 217,
- "tag": "Brown rat"
- }
- ],
- "timestamp_created": "2023-02-16 09:20:13.212226+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000041/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "65": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "draft",
- "id": 65,
- "name": "Human, macaque, and mouse L5 pyramidal neuron physiology",
- "repository_type": "dandi",
- "summary": "Patch clamp recordings from human premotor cortex, macaque M1 and mouse MOp.",
- "tags": [
- {
- "id": 27,
- "tag": "Patch-seq"
- },
- {
- "id": 48,
- "tag": "Motor cortex"
- },
- {
- "id": 76,
- "tag": "Betz cell"
- },
- {
- "id": 77,
- "tag": "Human"
- },
- {
- "id": 78,
- "tag": "Macaque"
- },
- {
- "id": 79,
- "tag": "Mouse"
- },
- {
- "id": 218,
- "tag": "DANDI:000043"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 193,
- "tag": "House mouse"
- }
- ],
- "timestamp_created": "2023-02-16 09:20:14.587463+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000043/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "66": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "0.250624.0426",
- "id": 66,
- "name": "Diversity in neural firing dynamics supports both rigid and learned hippocampal sequences",
- "repository_type": "dandi",
- "summary": "This data set is composed of eight bilateral silicon-probe multi-cellular electrophysiological recordings performed on four male Long-Evans rats in the Buzs\u00e1ki lab at NYU. These recordings were performed to assess the effect of novel spatial learning on hippocampal CA1 neural firing and LFP patterns in na\u00efve animals. Each session consisted of a long (~4 hour) PRE rest/sleep epoch home-cage recordings performed in a familiar room, followed by a Novel MAZE running epoch (~45 minutes) in which the animals were transferred to a novel room, and water-rewarded to run on a novel maze. These mazes were either A) a wooden 1.6m linear platform, B) a wooden 1m diameter circular platform or C) a 2m metal linear platform. Animals were rewarded either at both ends of the linear platform, or at a predetermined location on the circular platform. The animal was gently encouraged to run unidirectionally on the circular platform. After the MAZE epochs the animals were transferred back to their home-cage in the familiar room where a long (~4 hour) POST rest/sleep was recorded. All eight sessions were concatenated from the PRE, MAZE, and POST recording epochs. In addition to hippocampal electrophysiological recordings, neck EMG and head-mounted accelerometer signals were recorded, and the animal\u2019s position during MAZE running epochs was tracked via head-mounted LEDs.",
- "tags": [
- {
- "id": 219,
- "tag": "DANDI:000044"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 217,
- "tag": "Brown rat"
- }
- ],
- "timestamp_created": "2023-02-16 09:20:15.832550+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000044/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "67": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "0.211209.1413",
- "id": 67,
- "name": "IBL behavioral data",
- "repository_type": "dandi",
- "summary": "This dataset is a result of a multi-institution, cross country collaboration of labs, called International Brain Laboratory conducting standardized experiments on decision-making in mice. In the experiment, mice are shown a visual grating on screen with varying levels of contrast, and they are trained to rotate a wheel to move the on-screen stimulus from either side of their visual field to the center. These NWB files contain datasets corresponding to this wheel movement, camera footage of mice and information about the visual stimulus at every trial. \nPaper: \nAguillon, V., Angelaki, D., Bayer, H. M., Bonacchi, N., Carandini, M., Cazettes, F., Churchland, A. K., Chapuis, G., Dan, Y., Dewitt, E., Faulkner, M., Hamish, F., Haetzel, L., Hausser, M., Hofer, S., Hu, F., Khanal, A., Krasniak, C., Laranjeira, I., \u2026 Zador, A. (2020). A standardized and reproducible method to measure decision-making in mice. BioRxiv, 2020.01.17.909838. https://doi.org/10.1101/2020.01.17.909838",
- "tags": [
- {
- "id": 80,
- "tag": "International Brain Laboratory"
- },
- {
- "id": 220,
- "tag": "DANDI:000045"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 193,
- "tag": "House mouse"
- }
- ],
- "timestamp_created": "2023-02-16 09:20:17.901715+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000045/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "68": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "draft",
- "id": 68,
- "name": "Electrical and optical physiology in in vivo population-scale two-photon calcium imaging",
- "repository_type": "dandi",
- "summary": "Spiking activity and simultaneously recorded fluorescence signals in transgenic mice expressing GCaMP6\n\nWe present a dataset consisting of simultaneously measured fluorescence and spiking activity of pyramidal neurons in layer 2/3 of primary visual cortex in transgenic mouse lines expressing genetically-encoded calcium indicators (GECIs) GCaMP6s or GCaMP6f.\n\nReference: https://portal.brain-map.org/explore/circuits/oephys",
- "tags": [
- {
- "id": 221,
- "tag": "DANDI:000048"
- },
- {
- "id": 181,
- "tag": "DANDI"
- }
- ],
- "timestamp_created": "2023-02-16 09:20:19.191031+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000048/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "69": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "0.230223.1424",
- "id": 69,
- "name": "Allen Institute \u2013 TF x SF tuning in mouse visual cortex with calcium imaging",
- "repository_type": "dandi",
- "summary": "A two photon calcium imaging dataset from Allen Institute measuring responses to full-field drifting gratings (approx. 120x90 degrees of visual space) moving in 4 different directions, at 5 spatial frequencies (0.02, 0.04, 0.08, 0.16, 0.32 cpd), and 5 temporal frequencies (0.5, 1, 2, 4, 8 Hz). The ratio of TF/SF is speed (deg/sec) and the extent to which visual neurons exhibit speed tuning has been shown to vary across some cortical areas (Andermann et al. 2011).\nMouse Cre lines expressing GCaMPf were imaged to record responses of pyramidal neurons across cortical layers (Cux2: layer 2/3; Rorb: layer 4; Rbp4: layer 5; Ntsr1: layer 6) as well as somatostatin inhibitory interneurons (Sst). All Cre lines were imaged in VISp, and some (Cux2 and Sst) were also imaged in VISl, VISal, VISpm, VISam, and VISrl. All experimental sessions took place on the same data collection pipeline as the Allen Brain Observatory (see de Vries, Lecoq, Buice et al. 2020) and have the same visual stimulus monitor calibration and positioning, two photon imaging systems and image processing pipeline, and running wheel to track locomotion. Data are subject to Allen Institute Terms of Use policy, available at: http://www.alleninstitute.org/legal/terms-use/",
- "tags": [
- {
- "id": 79,
- "tag": "Mouse"
- },
- {
- "id": 222,
- "tag": "2-photon calcium imaging"
- },
- {
- "id": 33,
- "tag": "visual cortex"
- },
- {
- "id": 223,
- "tag": "DANDI:000049"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 193,
- "tag": "House mouse"
- }
- ],
- "timestamp_created": "2023-02-16 09:20:20.713691+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000049/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "70": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "draft",
- "id": 70,
- "name": "Allen Institute - Run Tuning in the Mouse Visual Cortex",
- "repository_type": "dandi",
- "summary": "Allen Institute for Brain Science, MindScope Project.",
- "tags": [
- {
- "id": 224,
- "tag": "DANDI:000050"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 193,
- "tag": "House mouse"
- }
- ],
- "timestamp_created": "2023-02-16 09:20:21.982025+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000050/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "71": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "draft",
- "id": 71,
- "name": "pons8-yo_16xdownsampled",
- "repository_type": "dandi",
- "summary": "Downsampled image of pons slice #8 stained with a nuclear dye. For testing only.\n",
- "tags": [
- {
- "id": 225,
- "tag": "DANDI:000051"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 77,
- "tag": "Human"
- }
- ],
- "timestamp_created": "2023-02-16 09:20:23.262047+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000051/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "72": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "draft",
- "id": 72,
- "name": "Pons8-BIDS-16xdownsampled",
- "repository_type": "dandi",
- "summary": "A test upload of Pons8 YO and Lectin, downsampled 16x using the BIDS schema",
- "tags": [
- {
- "id": 226,
- "tag": "DANDI:000052"
- },
- {
- "id": 181,
- "tag": "DANDI"
- }
- ],
- "timestamp_created": "2023-02-16 09:20:24.523327+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000052/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "73": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "0.210819.0345",
- "id": 73,
- "name": "Recordings from medial entorhinal cortex during linear track and open exploration",
- "repository_type": "dandi",
- "summary": "This dataset contains two task types. The first is tetrode recordings from medial entorhinal cortex during open field navigation with simultaneous inertial measurements of the head, and the second is Neuropixel recordings from medial entorhinal cortex during navigation down a virtual linear track with simultaneous eye measurements.",
- "tags": [
- {
- "id": 81,
- "tag": "neuropixel"
- },
- {
- "id": 82,
- "tag": "entorhinal cortex"
- },
- {
- "id": 228,
- "tag": "DANDI:000053"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 193,
- "tag": "House mouse"
- }
- ],
- "timestamp_created": "2023-02-16 09:20:25.810154+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000053/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "74": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "0.210819.1547",
- "id": 74,
- "name": "Plitt & Giocomo (2021) Experience Dependent Contextual Codes in the Hippocampus. Nat Neuro",
- "repository_type": "dandi",
- "summary": "Data included in Plitt & Giocomo (2021) Nature Neuroscience",
- "tags": [
- {
- "id": 229,
- "tag": "DANDI:000054"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 193,
- "tag": "House mouse"
- }
- ],
- "timestamp_created": "2023-02-16 09:20:27.079189+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000054/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "75": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "0.220127.0436",
- "id": 75,
- "name": "AJILE12: Long-term naturalistic human intracranial neural recordings and pose",
- "repository_type": "dandi",
- "summary": "Understanding the neural basis of human movement in naturalistic scenarios is critical for expanding neuroscience research beyond constrained laboratory paradigms. The neural correlates of unstructured, spontaneous movements in completely naturalistic settings have rarely been studied, due in large part to a lack of available data. Here, we present our Annotated Joints in Long-term Electrocorticography for 12 human participants (AJILE12) dataset, the largest human neurobehavioral dataset that is publicly available; the dataset was recorded opportunistically during passive clinical epilepsy monitoring. AJILE12 includes synchronized intracranial neural recordings and upper body pose trajectories across 55 semi-continuous days of naturalistic movements, along with relevant metadata, including thousands of wrist movement events and annotated behavioral states. Neural recordings are available at 500 Hz from at least 64 electrodes per participant, for a total of 1280 hours. Pose trajectories at 9 upper-body keypoints, including wrist, elbow, and shoulder joints, were sampled at 30 frames per second and estimated from 118 million video frames. In adherence with the FAIR data principles, we have shared AJILE12 on The Dandi Archive in the Neurodata Without Borders (NWB) data standard and developed a browser-based dashboard to facilitate data exploration and reuse.",
- "tags": [
- {
- "id": 230,
- "tag": "DANDI:000055"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 77,
- "tag": "Human"
- }
- ],
- "timestamp_created": "2023-02-16 09:20:28.417399+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000055/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "77": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "draft",
- "id": 77,
- "name": "MITU01 Dataset",
- "repository_type": "dandi",
- "summary": "7T MR structural images. B0 and B1+ code corrected parameter maps. ",
- "tags": [
- {
- "id": 231,
- "tag": "DANDI:000058"
- },
- {
- "id": 181,
- "tag": "DANDI"
- }
- ],
- "timestamp_created": "2023-02-16 09:20:30.911062+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000058/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "78": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "0.250624.0444",
- "id": 78,
- "name": "Cooling of Medial Septum Reveals Theta Phase Lag Coordination of Hippocampal Cell Assemblies",
- "repository_type": "dandi",
- "summary": "Hippocampal theta oscillations coordinate neuronal firing to support memory and spatial navigation. The medial septum (MS) is critical in theta generation by two possible mechanisms: either a unitary \u201cpacemaker\u201d timing signal is imposed on the hippocampal system, or it may assist in organizing target subcircuits within the phase space of theta oscillations. We used temperature manipulation of the MS to test these models. Cooling of the MS reduced both theta frequency and power and was associated with an enhanced incidence of errors in a spatial navigation task, but it did not affect spatial correlates of neurons. MS cooling decreased theta frequency oscillations of place cells and reduced distance-time compression but preserved distance-phase compression of place field sequences within the theta cycle. Thus, the septum is critical for sustaining precise theta phase coordination of cell assemblies in the hippocampal system, a mechanism needed for spatial memory.",
- "tags": [
- {
- "id": 232,
- "tag": "DANDI:000059"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 205,
- "tag": "Rattus norvegicus - Norway rat"
- }
- ],
- "timestamp_created": "2023-02-16 09:20:32.180782+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000059/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "79": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "draft",
- "id": 79,
- "name": "Dataset for Finkelstein, Fontolan et al. \"Attractor dynamics gate cortical information flow during decision-making\"",
- "repository_type": "dandi",
- "summary": "Extracellular electrophysiology recordings in anterior lateral motor cortex and in vibrissal sensory cortex in mice trained to detect optogenetic stimulation of the vibrissal sensory cortex.\n\nThe data analysis code for this dataset is available here: \n https://github.com/arsenyf/FinkelsteinFontolan_2021NN",
- "tags": [
- {
- "id": 28,
- "tag": "motor cortex"
- },
- {
- "id": 52,
- "tag": "extracellular electrophysiology"
- },
- {
- "id": 84,
- "tag": "decision-making"
- },
- {
- "id": 85,
- "tag": "attractor"
- },
- {
- "id": 86,
- "tag": "optogenetic stimulation"
- },
- {
- "id": 233,
- "tag": "DANDI:000060"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 193,
- "tag": "House mouse"
- }
- ],
- "timestamp_created": "2023-02-16 09:20:33.441243+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000060/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "80": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "0.250624.0426",
- "id": 80,
- "name": "Reactivations of emotional memory in the hippocampus\u2013amygdala system during sleep",
- "repository_type": "dandi",
- "summary": "The consolidation of context-dependent emotional memory requires communication between the hippocampus and the basolateral amygdala (BLA), but the mechanisms of this process are unknown. We recorded neuronal ensembles in the hippocampus and BLA while rats learned the location of an aversive air puff on a linear track, as well as during sleep before and after training. We found coordinated reactivations between the hippocampus and the BLA during non-REM sleep following training. These reactivations peaked during hippocampal sharp wave\u2013ripples (SPW-Rs) and involved a subgroup of BLA cells positively modulated during hippocampal SPW-Rs. Notably, reactivation was stronger for the hippocampus\u2013BLA correlation patterns representing the run direction that involved the air puff than for the 'safe' direction. These findings suggest that consolidation of contextual emotional memory occurs during ripple-reactivation of hippocampus\u2013amygdala circuits.",
- "tags": [
- {
- "id": 234,
- "tag": "DANDI:000061"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 217,
- "tag": "Brown rat"
- }
- ],
- "timestamp_created": "2023-02-16 09:20:34.702157+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000061/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "81": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "0.221025.1735",
- "id": 81,
- "name": "Simulation extension example",
- "repository_type": "dandi",
- "summary": "This is data produced by the Soltesz Lab NeuroH5 software (https://github.com/iraikov/neuroh5). The data has been converted to NWB using the ndx-simulation-output extension (https://github.com/catalystneuro/ndx-simulation-output).",
- "tags": [
- {
- "id": 235,
- "tag": "DANDI:000064"
- },
- {
- "id": 181,
- "tag": "DANDI"
- }
- ],
- "timestamp_created": "2023-02-16 09:20:36.033326+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000064/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "82": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "draft",
- "id": 82,
- "name": "Polymer probe recordings from hippocampus (LFP), OFC, NAc, and mPFC",
- "repository_type": "dandi",
- "summary": "Recordings made by Jason Chung in the Frank laboratory at UCSF using 64 channel polymer probes across 4 regions in an animal resting in a box. Note that the position data is duplicated, one copy for each epoch.",
- "tags": [
- {
- "id": 88,
- "tag": "polymer probe"
- },
- {
- "id": 35,
- "tag": "electrophysiology"
- },
- {
- "id": 89,
- "tag": "nucleus accumbens"
- },
- {
- "id": 90,
- "tag": "medial prefrontal cortex"
- },
- {
- "id": 91,
- "tag": "orbitofrontal cortex"
- },
- {
- "id": 92,
- "tag": "hippocampus"
- },
- {
- "id": 93,
- "tag": "sleep"
- },
- {
- "id": 287,
- "tag": "rat"
- },
- {
- "id": 288,
- "tag": "DANDI:000065"
- },
- {
- "id": 181,
- "tag": "DANDI"
- }
- ],
- "timestamp_created": "2023-02-16 09:20:37.248664+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000065/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "83": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "draft",
- "id": 83,
- "name": "Allen Mouse Common Coordinate Framework - Average Brain Template",
- "repository_type": "dandi",
- "summary": "The reference space or brain template was constructed as a population average of 1,675 young adult C57BL/6J mice brains imaged using serial two photon tomography (STPT) for the Allen Mouse Brain Connectivity Atlas. The average template was created from tissue autofluorescence detected in the red channel. To maximize input data and create a symmetrical atlas, each dataset was reflected across the midline, for a total of 3,350 (2 x 1,675) hemisphere datasets. Creation of the template followed a two-step iterative process: (1) We deformably registered each specimen to the current iteration of the template and computed an intensity average. (2) We then computed the average deformation field, inverted it, and applied it to the intensity average created in (1). This resulted in a volume with an average unbiased shape and intensity to be used as the template in the next iteration until convergence.\n\nThe axes the average template volume is a +X=Posterior, +Y=Inferior(Ventral) and +Z=Right frame with the origin at the corner of the volume.",
- "tags": [
- {
- "id": 237,
- "tag": "DANDI:000066"
- },
- {
- "id": 181,
- "tag": "DANDI"
- }
- ],
- "timestamp_created": "2023-02-16 09:20:38.530897+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000066/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "84": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "0.250624.0419",
- "id": 84,
- "name": "Behavior-dependent short-term assembly dynamics in the medial prefrontal cortex",
- "repository_type": "dandi",
- "summary": "Although short-term plasticity is believed to play a fundamental role in cortical computation, empirical evidence bearing on its role during behavior is scarce. Here we looked for the signature of short-term plasticity in the fine-timescale spiking relationships of a simultaneously recorded population of physiologically identified pyramidal cells and interneurons, in the medial prefrontal cortex of the rat, in a working memory task. On broader timescales, sequentially organized and transiently active neurons reliably differentiated between different trajectories of the rat in the maze. On finer timescales, putative monosynaptic interactions reflected short-term plasticity in their dynamic and predictable modulation across various aspects of the task, beyond a statistical accounting for the effect of the neurons' co-varying firing rates. Seeking potential mechanisms for such effects, we found evidence for both firing pattern\u2013dependent facilitation and depression, as well as for a supralinear effect of presynaptic coincidence on the firing of postsynaptic targets.",
- "tags": [
- {
- "id": 238,
- "tag": "DANDI:000067"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 217,
- "tag": "Brown rat"
- }
- ],
- "timestamp_created": "2023-02-16 09:20:39.777005+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000067/draft",
- "user": {
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- "summary": "This dataset contains sorted unit spiking times from a macaque performing a time-interval reproduction task. In the experimental task, the monkey was presented with two stimuli separated by a specific interval of time. The monkey then attempted to time their response such that the interval between the second stimulus and their response matched the interval separating the two stimuli. Neural activity was recorded from neural probes implanted in the dorsomedial frontal cortex. Provided as part of the Neural Latents Benchmark: https://neurallatents.github.io.",
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- "summary": "This dataset contains sorted unit spiking times and behavioral data from a macaque performing a delayed reaching task. The experimental task was a center-out reaching task with obstructing barriers forming a maze, resulting in a variety of straight and curved reaches. Neural activity was recorded from electrode arrays implanted in the motor cortex (M1) and dorsal premotor cortex (PMd). Cursor position, hand position, and eye position were also recorded during the experiment, and hand velocity was calculated offline from hand position. The provided data has been limited to 500 train trials and 100 test trials. Provided as part of the Neural Latents Benchmark: https://neurallatents.github.io.",
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- "name": "MC_Maze_Medium: macaque primary motor and dorsal premotor cortex spiking activity during delayed reaching",
- "repository_type": "dandi",
- "summary": "This dataset contains sorted unit spiking times and behavioral data from a macaque performing a delayed reaching task. The experimental task was a center-out reaching task with obstructing barriers forming a maze, resulting in a variety of straight and curved reaches. Neural activity was recorded from electrode arrays implanted in the motor cortex (M1) and dorsal premotor cortex (PMd). Cursor position, hand position, and eye position were also recorded during the experiment, and hand velocity was calculated offline from hand position. The provided data has been limited to 250 train trials and 100 test trials. Provided as part of the Neural Latents Benchmark: https://neurallatents.github.io.",
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- "default_context": "0.220113.0408",
- "id": 100,
- "name": "MC_Maze_Small: macaque primary motor and dorsal premotor cortex spiking activity during delayed reaching",
- "repository_type": "dandi",
- "summary": "This dataset contains sorted unit spiking times and behavioral data from a macaque performing a delayed reaching task. The experimental task was a center-out reaching task with obstructing barriers forming a maze, resulting in a variety of straight and curved reaches. Neural activity was recorded from electrode arrays implanted in the motor cortex (M1) and dorsal premotor cortex (PMd). Cursor position, hand position, and eye position were also recorded during the experiment, and hand velocity was calculated offline from hand position. The provided data has been limited to 100 train trials and 100 test trials. Provided as part of the Neural Latents Benchmark: https://neurallatents.github.io.",
- "tags": [
- {
- "id": 101,
- "tag": "Neural Latents Benchmark"
- },
- {
- "id": 102,
- "tag": "NLB"
- },
- {
- "id": 257,
- "tag": "DANDI:000140"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 242,
- "tag": "Rhesus monkey"
- }
- ],
- "timestamp_created": "2023-02-16 10:13:04.230012+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000140/draft",
- "user": {
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- "last_name": "Admin",
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "101": {
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- "experimental"
- ],
- "default_context": "0.211007.1926",
- "id": 101,
- "name": "20210923_AIBS_Patchseq_human",
- "repository_type": "dandi",
- "summary": "U01 Lein PatchSeq upload September 2021",
- "tags": [
- {
- "id": 27,
- "tag": "Patch-seq"
- },
- {
- "id": 7,
- "tag": "human"
- },
- {
- "id": 103,
- "tag": "neocortical"
- },
- {
- "id": 258,
- "tag": "DANDI:000142"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 77,
- "tag": "Human"
- }
- ],
- "timestamp_created": "2023-02-16 10:13:05.609810+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000142/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "102": {
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- "content_types": "experimental",
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- "experimental"
- ],
- "default_context": "draft",
- "id": 102,
- "name": "IHC Validation Data",
- "repository_type": "dandi",
- "summary": "Confocal images of constained CDI and commercially available antibodies to the same target in mouse and human brain tissues",
- "tags": [
- {
- "id": 259,
- "tag": "DANDI:000143"
- },
- {
- "id": 181,
- "tag": "DANDI"
- }
- ],
- "timestamp_created": "2023-02-16 10:13:06.844543+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000143/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "103": {
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- "experimental"
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- "default_context": "draft",
- "id": 103,
- "name": "croat-test",
- "repository_type": "dandi",
- "summary": "Testing",
- "tags": [
- {
- "id": 260,
- "tag": "DANDI:000144"
- },
- {
- "id": 181,
- "tag": "DANDI"
- }
- ],
- "timestamp_created": "2023-02-16 10:13:08.004199+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000144/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "104": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "0.221122.2256",
- "id": 104,
- "name": "PPC_Finger: human posterior parietal cortex recordings during attempted finger movements",
- "repository_type": "dandi",
- "summary": "This dataset contains neural activity and trial information from a tetraplegic human participant performing a brain-computer interface (BCI) finger press task. Neural activity was recorded from a 96-channel Utah array (Blackrock) implanted in the left posterior parietal cortex (PPC) at the junction of the postcentral and intraparietal sulci (PC-IP). On each trial, a finger cue, at a pseudorandom location on a screen, was selected. The participant immediately looked at the cue and pressed the cued finger until decoder feedback was shown (1.5 seconds after the cue).\n\nThis dataset includes sorted unit spiking times, finger cue, in-session classified finger, cue location, and trial timing.",
- "tags": [
- {
- "id": 104,
- "tag": "PPC"
- },
- {
- "id": 7,
- "tag": "human"
- },
- {
- "id": 105,
- "tag": "finger"
- },
- {
- "id": 261,
- "tag": "DANDI:000147"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 262,
- "tag": "Homo sapiens - Human"
- }
- ],
- "timestamp_created": "2023-02-16 10:13:09.206885+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000147/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "105": {
- "auto_sync": true,
- "content_types": "experimental",
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- "experimental"
- ],
- "default_context": "draft",
- "id": 105,
- "name": "Electrophysiological properties of adult mouse spinal cord neurons - 01_Oct_2021",
- "repository_type": "dandi",
- "summary": "Patch-clamp recording data from spinal cord neurons. Data was generated at Huizhong Tao's lab at USC(htao@usc.edu). The recording was performed by Can Tao(cantao@usc.edu) and Bo Peng(pengb@usc.edu).",
- "tags": [
- {
- "id": 263,
- "tag": "DANDI:000148"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 194,
- "tag": "Mus musculus - House mouse"
- }
- ],
- "timestamp_created": "2023-02-16 10:13:10.387576+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000148/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "106": {
- "auto_sync": true,
- "content_types": "experimental",
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- "experimental"
- ],
- "default_context": "draft",
- "id": 106,
- "name": "IBL ephys data",
- "repository_type": "dandi",
- "summary": "This dataset is a result of a multi-institution, cross country collaboration of labs, called International Brain Laboratory conducting standardized experiments on decision-making in mice. This dataset contains contains data similar to the dandiset https://dandiarchive.org/dandiset/000045 with additional ephys data.",
- "tags": [
- {
- "id": 264,
- "tag": "DANDI:000149"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 193,
- "tag": "House mouse"
- }
- ],
- "timestamp_created": "2023-02-16 10:13:11.568922+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000149/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "107": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "0.211118.1526",
- "id": 107,
- "name": "Aery Jones et al (2021) Dentate Gyrus and CA3 GABAergic Interneurons Bidirectionally Modulate Signatures of Internal and External Drive to CA1",
- "repository_type": "dandi",
- "summary": "The experiment consisted of three cohorts of PVCre, SSTCre, and PVCre/SSTCre mice injected with either AAV5-hSyn-DIO-hM4D(Gi)-mCherry (hM4D) or AAV5-hSyn-DIO-mCherry (empty vector) in DG and CA3, then injected with vehicle or CNO prior to recordings. Recordings from all layers of CA1, CA3, and DG were taken during home cage rest and linear track movement. Data are described in Aery Jones et al, 2021, bioRxiv: \"Dentate Gyrus and CA3 GABAergic Interneurons Bidirectionally Modulate Signatures of Internal and External Drive to CA1\". For more information about this data, please contact Emily Aery Jones, Yadong Huang, or Loren Frank.",
- "tags": [
- {
- "id": 92,
- "tag": "hippocampus"
- },
- {
- "id": 29,
- "tag": "mouse"
- },
- {
- "id": 106,
- "tag": "LFP"
- },
- {
- "id": 265,
- "tag": "DANDI:000165"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 193,
- "tag": "House mouse"
- }
- ],
- "timestamp_created": "2023-02-16 10:13:12.864708+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000165/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "108": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "0.250624.0434",
- "id": 108,
- "name": "Layer-Specific Physiological Features and Interlaminar Interactions in the Primary Visual Cortex of the Mouse",
- "repository_type": "dandi",
- "summary": "The relationship between mesoscopic local field potentials (LFPs) and single-neuron firing in the multi-layered neocortex is poorly understood. Simultaneous recordings from all layers in the primary visual cortex (V1) of the behaving mouse revealed functionally defined layers in V1. The depth of maximum spike power and sink-source distributions of LFPs provided consistent laminar landmarks across animals. Coherence of gamma oscillations (30-100 Hz) and spike-LFP coupling identified six physiological layers and further sublayers. Firing rates, burstiness, and other electrophysiological features of neurons displayed unique layer and brain state dependence. Spike transmission strength from layer 2/3 cells to layer 5 pyramidal cells and interneurons was stronger during waking compared with non-REM sleep but stronger during non-REM sleep among deep-layer excitatory neurons. A subset of deep-layer neurons was active exclusively in the DOWN state of non-REM sleep. These results bridge mesoscopic LFPs and single-neuron interactions with laminar structure in V1.",
- "tags": [
- {
- "id": 12,
- "tag": "current source density"
- },
- {
- "id": 13,
- "tag": "laminar recordings"
- },
- {
- "id": 8,
- "tag": "cortex"
- },
- {
- "id": 35,
- "tag": "electrophysiology"
- },
- {
- "id": 266,
- "tag": "DANDI:000166"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 193,
- "tag": "House mouse"
- }
- ],
- "timestamp_created": "2023-02-16 10:13:14.155445+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000166/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "109": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "0.230720.2001",
- "id": 109,
- "name": "Two photon calcium imaging of mice piriform cortex under passive odor presentation",
- "repository_type": "dandi",
- "summary": "Two-photon calcium imaging of mouse piriform cortex pyramidal population, under head-fixed condition and passive odor stimulus delivery. There were 10 different odors used (8 trials each), delivered at 10-second for each of the 30-second trial. Imaging was preprocessed with Suite2p. The data was collected by Simon Daste in the Fleischmann lab at Brown University. Showcase notebook available at: https://gitlab.com/fleischmann-lab/datasets/daste-odor-set-2021-11",
- "tags": [
- {
- "id": 267,
- "tag": "DANDI:000167"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 194,
- "tag": "Mus musculus - House mouse"
- }
- ],
- "timestamp_created": "2023-02-16 10:13:15.544762+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000167/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "110": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "draft",
- "id": 110,
- "name": "Simultaneous loose seal cell-attached recordings and two-photon imaging of GCaMP8 expressing mouse V1 neurons with drifting gratings visual stimuli",
- "repository_type": "dandi",
- "summary": "We tested the jGCaMP8 sensors in L2/3 pyramidal neurons of mouse primary visual cortex. We made a craniotomy over V1 and infected neurons with adeno-associated virus (AAV2/1-hSynapsin-1) encoding jGCaMP8 variants (s/m/f), jGCaMP7f, or XCaMP-Gf. 18-80 days after the virus injection, the mouse was anesthetized, and we surgically removed the cranial window and performed durotomy. The craniotomy was filled with 10-15 \u03bcL of 1.5% agarose, and a D-shaped coverslip was secured on top to suppress brain motion and leave access to the brain on the lateral side of the craniotomy. Then mice were lightly anesthetized and mounted under a custom two-photon microscope. Full-field, high-contrast drifting gratings were presented in each of eight directions to the contralateral eye. Two-photon imaging (122 Hz) was performed of L2/3 somata and neuropil combined with loose-seal, cell-attached electrophysiological recording of a single neuron in the field of view.",
- "tags": [
- {
- "id": 107,
- "tag": "2-photon"
- },
- {
- "id": 33,
- "tag": "visual cortex"
- },
- {
- "id": 108,
- "tag": "calcium"
- },
- {
- "id": 109,
- "tag": "spike"
- },
- {
- "id": 110,
- "tag": "action potential"
- },
- {
- "id": 111,
- "tag": "layer 2"
- },
- {
- "id": 112,
- "tag": "AAV"
- },
- {
- "id": 113,
- "tag": "adeno-associated virus"
- },
- {
- "id": 114,
- "tag": "jGCaMP8s"
- },
- {
- "id": 115,
- "tag": "jGCaMP8m"
- },
- {
- "id": 116,
- "tag": "jGCaMP8f"
- },
- {
- "id": 117,
- "tag": "jGCaMP7f"
- },
- {
- "id": 118,
- "tag": "XCaMP-Gf"
- },
- {
- "id": 268,
- "tag": "DANDI:000168"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 194,
- "tag": "Mus musculus - House mouse"
- }
- ],
- "timestamp_created": "2023-02-16 10:13:16.808419+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000168/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "111": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "0.220927.0404",
- "id": 111,
- "name": "Neural Spiking Data in Primary Somatosensory Cortex before and after Transcranial Focused Ultrasound Stimulation in Rats",
- "repository_type": "dandi",
- "summary": "In this study, we investigate how transcranial focused ultrasound (tFUS) modulates neural interaction and response to peripheral electrical limb stimulation through intracranial multi-electrode recordings in the rat somatosensory cortex. Rats were anesthetized using isoflurane anesthesia at 2%. Recordings were taken while delivering peripheral electrical stimulation once every 5 seconds to analyze the neural response in the rat S1HL region, before and after ultrasound. We delivered ultrasound for 5 minutes in a pulsed pattern at 5 different stimulation repetition frequencies (10 Hz, 50 Hz, 75 Hz, 100 Hz, and 125 Hz) to induce frequency dependent plasticity in a manner similar to that found following tetanic electrical stimulation. The fundamental frequency of ultrasound used was 0.5 MHz, the pulse repetition frequency (PRF) was 3 kHz, and the total duty cycle was 36%. This dataset includes spike timing data from the recordings including time before and after ultrasound stimulation, for both true ultrasound conditions and sham ultrasound conditions in which ultrasound is directed off target. Details of the study are in the following publication: S. Ramachandran, X. Niu, K. Yu, B. He, \"Transcranial ultrasound neuromodulation induces neuronal correlation change in the rat somatosensory cortex\", 2022 J. Neural Eng. 19 056002 https://pubmed.ncbi.nlm.nih.gov/35947970/. Please cite this publication if you would use a portion of the data. ",
- "tags": [
- {
- "id": 119,
- "tag": "Ultrasound"
- },
- {
- "id": 120,
- "tag": "Plasticity"
- },
- {
- "id": 121,
- "tag": "Rat"
- },
- {
- "id": 122,
- "tag": "tFUS"
- },
- {
- "id": 123,
- "tag": "Somatosensory Cortex"
- },
- {
- "id": 269,
- "tag": "DANDI:000173"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 205,
- "tag": "Rattus norvegicus - Norway rat"
- }
- ],
- "timestamp_created": "2023-02-16 10:13:18.072407+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000173/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "112": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "0.220103.2119",
- "id": 112,
- "name": "Visual cortical activity in mice performing naturalistic virtual foraging task",
- "repository_type": "dandi",
- "summary": "Large FOV two-photon calcium imaging dataset recorded from V1 L2/3 neurons from mouse performing a naturalistic foraging task in virtual reality.",
- "tags": [
- {
- "id": 270,
- "tag": "DANDI:000206"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 193,
- "tag": "House mouse"
- }
- ],
- "timestamp_created": "2023-02-16 10:13:19.284994+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000206/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "113": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "0.230530.1822",
- "id": 113,
- "name": "Data for: Neurons detect cognitive boundaries to structure episodic memories in humans (Zheng et al., 2022, Nat Neuro in press)",
- "repository_type": "dandi",
- "summary": "This dataset contains human single-neuron data recorded from the medial temporal lobe (MTL) during a set of experiments to explore the role of neurons that respond to cognitive boundaries. This dataset accompanies the paper cited below. Example code on how to plot this data can be found at https://github.com/rutishauserlab/cogboundary-zheng .\n\nReference (to be updated upon publication): Cognitive boundary signals in the human medial temporal lobe shape episodic memory representation. Jie Zheng, Andrea G\u00f3mez Palacio Schjetnan, Mar Yebra, Clayton Mosher, Suneil Kalia, Taufik A. Valiante, Adam N. Mamelak, Gabriel Kreiman, Ueli Rutishauser. bioRxiv 2021.01.16.426538. [Nat Neuro, in press, 2022]",
- "tags": [
- {
- "id": 124,
- "tag": "human single neuron"
- },
- {
- "id": 92,
- "tag": "hippocampus"
- },
- {
- "id": 125,
- "tag": "episodic memory"
- },
- {
- "id": 126,
- "tag": "event segmentation"
- },
- {
- "id": 127,
- "tag": "amygdala"
- },
- {
- "id": 128,
- "tag": "parahippocampal gyrus"
- },
- {
- "id": 129,
- "tag": "cognitive boundaries"
- },
- {
- "id": 130,
- "tag": "continuous experience"
- },
- {
- "id": 131,
- "tag": "ROH consortium"
- },
- {
- "id": 271,
- "tag": "DANDI:000207"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 262,
- "tag": "Homo sapiens - Human"
- }
- ],
- "timestamp_created": "2023-02-16 10:13:20.567204+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000207/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "114": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "0.230522.1918",
- "id": 114,
- "name": "20211223_AIBS_Patchseq_human",
- "repository_type": "dandi",
- "summary": "U01 Lein PatchSeq upload December 2021",
- "tags": [
- {
- "id": 27,
- "tag": "Patch-seq"
- },
- {
- "id": 7,
- "tag": "human"
- },
- {
- "id": 103,
- "tag": "neocortical"
- },
- {
- "id": 272,
- "tag": "DANDI:000209"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 77,
- "tag": "Human"
- }
- ],
- "timestamp_created": "2023-02-16 10:13:21.773180+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000209/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "115": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "draft",
- "id": 115,
- "name": "Tracking of Drosophila during egg-laying decisions",
- "repository_type": "dandi",
- "summary": "Dataset on the egg-laying behavior of flies used to understand how flies make egg-laying decisions. Each NWB file contains time series data from an individual fly: the x-y position of the fly, egg-deposition moments of the fly, and sucrose concentration underneath the fly. A variety of fly genotypes and a variety of environments (egg-laying chambers) were used. Data and methods are described in \"A rise-to-threshold signal for a relative value deliberation\" (https://www.biorxiv.org/content/10.1101/2021.09.23.461548v1) and \u201cAn internal expectation guides Drosophila egg-laying decisions\u201d (https://doi.org/10.1126/sciadv.abn3852). Please contact Vikram Vijayan and/or Gaby Maimon for more information including different download options and different raw/processed data formats.",
- "tags": [
- {
- "id": 132,
- "tag": "Drosophila"
- },
- {
- "id": 133,
- "tag": "egg laying"
- },
- {
- "id": 134,
- "tag": "flies"
- },
- {
- "id": 20,
- "tag": "decision making"
- },
- {
- "id": 135,
- "tag": "internal expectation"
- },
- {
- "id": 273,
- "tag": "DANDI:000212"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 274,
- "tag": "Drosophila melanogaster - Fruit fly"
- }
- ],
- "timestamp_created": "2023-02-16 10:13:23.122559+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000212/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "116": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "0.250624.0438",
- "id": 116,
- "name": "Transformation of a Spatial Map across the Hippocampal-Lateral Septal Circuit",
- "repository_type": "dandi",
- "summary": "The hippocampus constructs a map of the environment. How this \u201ccognitive map\u201d is utilized by other brain regions to guide behavior remains unexplored. To examine how neuronal firing patterns in the hippocampus are transmitted and transformed, we recorded neurons in its principal subcortical target, the lateral septum (LS). We observed that LS neurons carry reliable spatial information in the phase of action potentials, relative to hippocampal theta oscillations, while the firing rates of LS neurons remained uninformative. Furthermore, this spatial phase code had an anatomical microstructure within the LS and was bound to the hippocampal spatial code by synchronous gamma frequency cell assemblies. Using a data-driven model, we show that rate-independent spatial tuning arises through the dynamic weighting of CA1 and CA3 cell assemblies. Our findings demonstrate that transformation of the hippocampal spatial map depends on higher-order theta-dependent neuronal sequences.",
- "tags": [
- {
- "id": 92,
- "tag": "hippocampus"
- },
- {
- "id": 136,
- "tag": "lateral septum"
- },
- {
- "id": 35,
- "tag": "electrophysiology"
- },
- {
- "id": 275,
- "tag": "DANDI:000213"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 205,
- "tag": "Rattus norvegicus - Norway rat"
- }
- ],
- "timestamp_created": "2023-02-16 10:13:24.372506+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000213/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "117": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "0.220125.2004",
- "id": 117,
- "name": "Sniff-synchronized, gradient-guided olfactory search by freely moving mice -- Behavioral Dataset",
- "repository_type": "dandi",
- "summary": "This dataset contains the movement tracking, sniff recording, and trial statistics for the dataset used in the publication: Sniff-synchronized, gradient-guided olfactory search by freely moving mice in eLife (Findley et al. 2021)",
- "tags": [
- {
- "id": 276,
- "tag": "DANDI:000217"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 194,
- "tag": "Mus musculus - House mouse"
- }
- ],
- "timestamp_created": "2023-02-16 10:13:25.912515+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000217/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "118": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "0.250624.0439",
- "id": 118,
- "name": "Routing of Hippocampal Ripples to Subcortical Structures via the Lateral Septum",
- "repository_type": "dandi",
- "summary": "The mnemonic functions of hippocampal sharp wave ripples (SPW-Rs) have been studied extensively. Because hippocampal outputs affect not only cortical but also subcortical targets, we examined the impact of SPW-Rs on the firing patterns of lateral septal (LS) neurons in behaving rats. A large fraction of SPW-Rs were temporally locked to high-frequency oscillations (HFOs) (120\u2013180 Hz) in LS, with strongest coupling during non-rapid eye movement (NREM) sleep, followed by waking immobility. However, coherence and spike-local field potential (LFP) coupling between the two structures were low, suggesting that HFOs are generated locally within the LS GABAergic population. This hypothesis was supported by optogenetic induction of HFOs in LS. Spiking of LS neurons was largely independent of the sequential order of spiking in SPW-Rs but instead correlated with the magnitude of excitatory synchrony of the hippocampal output. Thus, LS is strongly activated by SPW-Rs and may convey hippocampal population events to its hypothalamic and brainstem targets.",
- "tags": [
- {
- "id": 92,
- "tag": "hippocampus"
- },
- {
- "id": 136,
- "tag": "lateral septum"
- },
- {
- "id": 137,
- "tag": "electrophyisology"
- },
- {
- "id": 277,
- "tag": "DANDI:000218"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 205,
- "tag": "Rattus norvegicus - Norway rat"
- }
- ],
- "timestamp_created": "2023-02-16 10:13:27.133551+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000218/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "119": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "draft",
- "id": 119,
- "name": "Two photon calcium imaging in the CA1 region of the hippocampus in neonatal mice.",
- "repository_type": "dandi",
- "summary": "We performed in vivo 2-photon calcium imaging in the CA1 region of the hippocampus in awake mouse pups aged between 5 and 12 days postnatal. We used GCaMP6s calcium indicator in WT mice or GCaMP6s and flex-tdTomato in GadCre mice to record calcium dynamics from both pyramidal cells and interneurons. The imaging data set was acquired at 8 Hz, in field of view of 400x400 \u00b5m. Simultaneously with imaging, we record the spontaneous motor behavior of the mouse pups.",
- "tags": [
- {
- "id": 278,
- "tag": "DANDI:000219"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 194,
- "tag": "Mus musculus - House mouse"
- }
- ],
- "timestamp_created": "2023-02-16 10:13:28.767193+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000219/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "120": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "draft",
- "id": 120,
- "name": "Electrophysiological properties of adult mouse spinal cord neurons - 25_Jan_2022",
- "repository_type": "dandi",
- "summary": "Patch-clamp recording data from spinal cord neurons. Data was generated at Huizhong Tao's lab at USC(htao@usc.edu). The recording was performed by Can Tao(cantao@usc.edu) and Bo Peng(pengb@usc.edu).",
- "tags": [
- {
- "id": 279,
- "tag": "DANDI:000220"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 194,
- "tag": "Mus musculus - House mouse"
- }
- ],
- "timestamp_created": "2023-02-16 10:13:29.933785+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000220/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "121": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "0.220307.1320",
- "id": 121,
- "name": "A midbrain-thalamus-cortex circuit reorganizes cortical dynamics to initiate movement",
- "repository_type": "dandi",
- "summary": "Data from \"A midbrain-thalamus-cortex circuit reorganizes cortical dynamics to initiate movement\" Inagaki & Chen et al\nExample codes to plot data is at https://github.com/hidehikoinagaki/InagakiAndChenEtAl2022",
- "tags": [
- {
- "id": 138,
- "tag": "Midbrain"
- },
- {
- "id": 139,
- "tag": "ALM"
- },
- {
- "id": 140,
- "tag": "motor planning"
- },
- {
- "id": 141,
- "tag": "movement initiation"
- },
- {
- "id": 295,
- "tag": "DANDI:000221"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 194,
- "tag": "Mus musculus - House mouse"
- }
- ],
- "timestamp_created": "2023-02-16 10:13:31.176465+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000221/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "122": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "0.220823.0826",
- "id": 122,
- "name": "Inferring monosynaptic connections from paired spine calcium imaging and large-scale recording of extracellular spiking",
- "repository_type": "dandi",
- "summary": "This dataset contains paired calcium imaging and high-density microelectrode array (HD-MEA) recordings from cortical embryonic cell cultures. \nThe data is used to infer monosynaptic connections using dendritic spine calcium traces and extracellular spiking.\nEach file includes:\n- raw extracellular recordings \n- spike-sorted units\n- imaging series\n- segmentation ROIs (of the target spines and adjacent dendritic shaft)",
- "tags": [
- {
- "id": 142,
- "tag": "calcium imaging; extracellular recordings; HD-MEA; spike sorting; dendritic spines"
- },
- {
- "id": 296,
- "tag": "DANDI:000223"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 205,
- "tag": "Rattus norvegicus - Norway rat"
- }
- ],
- "timestamp_created": "2023-02-16 10:13:32.382113+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000223/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "123": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "0.230607.1747",
- "id": 123,
- "name": "Active Touch and Self-Motion Encoding by Merkel Cell-Associated Afferents",
- "repository_type": "dandi",
- "summary": "Touch perception depends on integrating signals from multiple types of peripheral mechanoreceptors. Merkel-cell associated afferents are thought to play a major role in form perception by encoding surface features of touched objects. However, activity of Merkel afferents during active touch has not been directly measured. Here, we show that Merkel and unidentified slowly adapting afferents in the whisker system of behaving mice respond to both self-motion and active touch. Touch responses were dominated by sensitivity to bending moment (torque) at the base of the whisker and its rate of change and largely explained by a simple mechanical model. Self-motion responses encoded whisker position within a whisk cycle (phase), not absolute whisker angle, and arose from stresses reflecting whisker inertia and activity of specific muscles. Thus, Merkel afferents send to the brain multiplexed information about whisker position and surface features, suggesting that proprioception and touch converge at the earliest neural level.",
- "tags": [
- {
- "id": 297,
- "tag": "DANDI:000226"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 194,
- "tag": "Mus musculus - House mouse"
- }
- ],
- "timestamp_created": "2023-02-16 10:13:33.628682+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000226/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "124": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "draft",
- "id": 124,
- "name": "20220330_AIBS_Patchseq_human",
- "repository_type": "dandi",
- "summary": "U01 Lein PatchSeq upload March 2022",
- "tags": [
- {
- "id": 27,
- "tag": "Patch-seq"
- },
- {
- "id": 7,
- "tag": "human"
- },
- {
- "id": 103,
- "tag": "neocortical"
- },
- {
- "id": 298,
- "tag": "DANDI:000228"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 262,
- "tag": "Homo sapiens - Human"
- }
- ],
- "timestamp_created": "2023-02-16 10:13:34.848105+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000228/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "141": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "0.220805.1724",
- "id": 141,
- "name": " update 1- test release 0.7.0 - Drosophila visual neural responses to stochastic stimuli ",
- "repository_type": "dandi",
- "summary": "Associated Reference Publication: Excitatory and inhibitory neural dynamics jointly tune motion detection\nNeurons integrate excitatory and inhibitory signals to produce their outputs, but the role of input timing in this integration remains poorly understood. Motion detection is a paradigmatic example of this integration, since theories of motion detection rely on different delays in visual signals. These delays allow circuits to compare scenes at different times to calculate the direction and speed of motion. Different motion detection circuits have different velocity sensitivity, but it remains untested how the response dynamics of individual cell types drive this tuning. Here, we sped up or slowed down specific neuron types in Drosophila\u2019s motion detection circuit by manipulating ion channel expression. Altering the dynamics of individual neuron types upstream of motion detectors increased their sensitivity to fast or slow visual motion, exposing distinct roles for excitatory and inhibitory dynamics in tuning directional signals, including a role for the amacrine cell CT1. A circuit model constrained by functional data and anatomy qualitatively reproduced the observed tuning changes. Overall, these results reveal how excitatory and inhibitory dynamics together tune a canonical circuit computation.",
- "tags": [
- {
- "id": 1,
- "tag": "tutorial"
- }
- ],
- "timestamp_created": "2023-03-02 15:37:50.349608+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000296",
- "user": {
- "email": "simao@metacell.us",
- "first_name": "Sim\u00e3o",
- "id": "ee8a31d7-d54d-413c-a4c9-e140cf77404f",
- "last_name": "Bolota de Couto Sa",
- "username": "simao-osb"
- },
- "user_id": "ee8a31d7-d54d-413c-a4c9-e140cf77404f"
- },
- "143": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 143,
- "name": "NeuroMLlite Showcase",
- "repository_type": "github",
- "summary": "Work in progress...",
- "tags": [
- {
- "id": 610,
- "tag": "Generic"
- },
- {
- "id": 601,
- "tag": "Neocortex"
- },
- {
- "id": 604,
- "tag": "Network"
- },
- {
- "id": 612,
- "tag": "NeuroML2"
- },
- {
- "id": 540,
- "tag": "OSBv1"
- }
- ],
- "timestamp_created": "2023-03-31 13:52:10.868638+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/NeuroML/NeuroMLlite",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "144": {
- "auto_sync": true,
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- "default_context": "0.220805.1724",
- "id": 144,
- "name": "Drosophila visual neural responses to stochastic stimuli",
- "repository_type": "dandi",
- "summary": "Associated Reference Publication: Excitatory and inhibitory neural dynamics jointly tune motion detection\nNeurons integrate excitatory and inhibitory signals to produce their outputs, but the role of input timing in this integration remains poorly understood. Motion detection is a paradigmatic example of this integration, since theories of motion detection rely on different delays in visual signals. These delays allow circuits to compare scenes at different times to calculate the direction and speed of motion. Different motion detection circuits have different velocity sensitivity, but it remains untested how the response dynamics of individual cell types drive this tuning. Here, we sped up or slowed down specific neuron types in Drosophila\u2019s motion detection circuit by manipulating ion channel expression. Altering the dynamics of individual neuron types upstream of motion detectors increased their sensitivity to fast or slow visual motion, exposing distinct roles for excitatory and inhibitory dynamics in tuning directional signals, including a role for the amacrine cell CT1. A circuit model constrained by functional data and anatomy qualitatively reproduced the observed tuning changes. Overall, these results reveal how excitatory and inhibitory dynamics together tune a canonical circuit computation.",
- "tags": [
- {
- "id": 329,
- "tag": "DANDI:000296"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 274,
- "tag": "Drosophila melanogaster - Fruit fly"
- }
- ],
- "timestamp_created": "2023-04-13 17:21:22.563580+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000296/draft",
- "user": {
- "email": "info@opensourcebrain.org",
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- "145": {
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- "default_context": "main",
- "id": 145,
- "name": "NEURON course",
- "repository_type": "github",
- "summary": "",
- "tags": [
- {
- "id": 1,
- "tag": "tutorial"
- }
- ],
- "timestamp_created": "2023-05-12 08:20:09.996739+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/mcdougallab/neuron-course-june-2022",
- "user": {
- "email": "p.gl.eeson@gmail.com",
- "first_name": "Padraig6",
- "id": "b611c83e-483f-4b8c-a5c9-32ce5de9990f",
- "last_name": "Gleeson",
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- "user_id": "b611c83e-483f-4b8c-a5c9-32ce5de9990f"
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- "147": {
- "auto_sync": true,
- "content_types": "experimental",
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- "default_context": "0.240822.1759",
- "id": 147,
- "name": "Glia Accumulate Evidence that Actions Are Futile and Suppress Unsuccessful Behavior",
- "repository_type": "dandi",
- "summary": "When a behavior repeatedly fails to achieve its goal, animals often give up and become passive, which can be strategic for preserving energy or regrouping between attempts. It is unknown how the brain identifies behavioral failures and mediates this behavioral-state switch. In larval zebrafish swimming in virtual reality, visual feedback can be withheld so that swim attempts fail to trigger expected visual flow. After tens of seconds of such motor futility, animals became passive for similar durations. Whole-brain calcium imaging revealed noradrenergic neurons that responded specifically to failed swim attempts and radial astrocytes whose calcium levels accumulated with increasing numbers of failed attempts. Using cell ablation and optogenetic or chemogenetic activation, we found that noradrenergic neurons progressively activated brainstem radial astrocytes, which then suppressed swimming. Thus, radial astrocytes perform a computation critical for behavior: they accumulate evidence that current actions are ineffective and consequently drive changes in behavioral states.",
- "tags": [
- {
- "id": 159,
- "tag": "neuroscience"
- },
- {
- "id": 160,
- "tag": "glia"
- },
- {
- "id": 161,
- "tag": "astrocytes"
- },
- {
- "id": 162,
- "tag": "norepinephrine"
- },
- {
- "id": 163,
- "tag": "noradrenaline"
- },
- {
- "id": 164,
- "tag": "learned helplessness"
- },
- {
- "id": 165,
- "tag": "neuromodulation"
- },
- {
- "id": 166,
- "tag": "behavioral states"
- },
- {
- "id": 167,
- "tag": "evidence accumulation"
- },
- {
- "id": 168,
- "tag": "zebrafish"
- },
- {
- "id": 182,
- "tag": "DANDI:000350"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 305,
- "tag": "Danio rerio - Zebra fish"
- }
- ],
- "timestamp_created": "2023-11-27 17:44:17.412979+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000350/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "148": {
- "auto_sync": true,
- "content_types": "experimental",
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- ],
- "default_context": "draft",
- "id": 148,
- "name": "Jeong et al (2022) Mesolimbic dopamine release conveys causal associations",
- "repository_type": "dandi",
- "summary": "This dataset includes fiber photometry (NAcc) and behavioral data from Jeong et al., 2022: \"Mesolimbic dopamine release conveys causal associations\". Animals names and session numbers used for each figure can be found from 'Subject and session information' in Related resource.",
- "tags": [
- {
- "id": 184,
- "tag": "DANDI:000351"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 194,
- "tag": "Mus musculus - House mouse"
- }
- ],
- "timestamp_created": "2023-11-27 17:44:18.983514+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000351/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "149": {
- "auto_sync": true,
- "content_types": "experimental",
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- ],
- "default_context": "draft",
- "id": 149,
- "name": "Simultaneous loose seal cell-attached recordings and two-photon imaging of GCaMP8 expressing mouse V1 neurons with drifting gratings visual stimuli - RAW movies",
- "repository_type": "dandi",
- "summary": "We tested the jGCaMP8 sensors in L2/3 pyramidal neurons of mouse primary visual cortex. We made a craniotomy over V1 and infected neurons with adeno-associated virus (AAV2/1-hSynapsin-1) encoding jGCaMP8 variants (s/m/f), jGCaMP7f, or XCaMP-Gf. 18-80 days after the virus injection, the mouse was anesthetized, and we surgically removed the cranial window and performed durotomy. The craniotomy was filled with 10-15 \u03bcL of 1.5% agarose, and a D-shaped coverslip was secured on top to suppress brain motion and leave access to the brain on the lateral side of the craniotomy. Then mice were lightly anesthetized and mounted under a custom two-photon microscope. Full-field, high-contrast drifting gratings were presented in each of eight directions to the contralateral eye. Two-photon imaging (122 Hz) was performed of L2/3 somata and neuropil combined with loose-seal, cell-attached electrophysiological recording of a single neuron in the field of view. \nThis dataset contains the raw 2-photon videos, for registered movies see: https://dandiarchive.org/dandiset/000168/",
- "tags": [
- {
- "id": 348,
- "tag": "DANDI:000362"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 194,
- "tag": "Mus musculus - House mouse"
- }
- ],
- "timestamp_created": "2023-11-27 17:44:20.334477+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000362/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "150": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "0.231012.2129",
- "id": 150,
- "name": "Mesoscale Activity Map Dataset",
- "repository_type": "dandi",
- "summary": "Mesoscale Activity Map Project. Map behavior-related activity in a multi-regional network supporting memory-guided movement in mice. Anatomy-guided recordings from multiple connected brain regions, from anterior lateral motor cortex to the medulla.\n\nSupported by Simons Collaboration on the Global Brain, Janelia Visitor Project, NIH U19NS123714-01, R01NS112312, R01EB028171, McKnight foundation",
- "tags": [
- {
- "id": 349,
- "tag": "DANDI:000363"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 194,
- "tag": "Mus musculus - House mouse"
- }
- ],
- "timestamp_created": "2023-11-27 17:44:21.684493+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000363/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "151": {
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- "default_context": "draft",
- "id": 151,
- "name": "Large-scale neural recordings with single neuron resolution using Neuropixels probes in human cortex",
- "repository_type": "dandi",
- "summary": "Recent advances in multi-electrode array technology have made it possible to monitor large neuronal ensembles at cellular resolution in animal models. In humans, however, current approaches restrict recordings to few neurons per penetrating electrode or combine the signals of thousands of neurons in local field potential (LFP) recordings. Here, we describe a new probe variant and set of techniques which enable simultaneous recording from over 200 well-isolated cortical single units in human participants during intraoperative neurosurgical procedures using silicon Neuropixels probes. We characterized a diversity of extracellular waveforms with eight separable single unit classes, with differing firing rates, locations along the length of the electrode array, waveform spatial spread, and modulation by LFP events such as inter-ictal discharges and burst suppression. While some challenges remain in creating a turn-key recording system, high-density silicon arrays provide a path for studying human-specific cognitive processes and their dysfunction at unprecedented spatiotemporal resolution. ",
- "tags": [
- {
- "id": 350,
- "tag": "DANDI:000397"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 262,
- "tag": "Homo sapiens - Human"
- }
- ],
- "timestamp_created": "2023-11-27 17:44:22.854106+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000397/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "152": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
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- "default_context": "master",
- "id": 152,
- "name": "LFPy",
- "repository_type": "github",
- "summary": "",
- "tags": [
- {
- "id": 176,
- "tag": "ECoG"
- },
- {
- "id": 177,
- "tag": "MEG"
- },
- {
- "id": 106,
- "tag": "LFP"
- }
- ],
- "timestamp_created": "2023-12-05 14:00:39.554121+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/LFPy/LFPy",
- "user": {
- "email": "p.gleeson@gmail.com",
- "first_name": "Padraig",
- "id": "7089f659-90ad-4ed9-9715-2327f7e2e72f",
- "last_name": "Gleeson Admin",
- "username": "pgleeson"
- },
- "user_id": "7089f659-90ad-4ed9-9715-2327f7e2e72f"
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- "153": {
- "auto_sync": true,
- "content_types": "experimental",
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- "default_context": "develop",
- "id": 153,
- "name": "CH",
- "repository_type": "github",
- "summary": "",
- "tags": [],
- "timestamp_created": "2023-12-11 06:52:25.324253+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/MetaCell/cloud-harness",
- "user": {
- "email": "gopal@metacell.us",
- "first_name": "D. Gopal ",
- "id": "0db2937f-6534-434f-9e38-ff6ed1cbe395",
- "last_name": "Krishna",
- "username": "gopal"
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- "user_id": "0db2937f-6534-434f-9e38-ff6ed1cbe395"
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- "154": {
- "auto_sync": true,
- "content_types": "experimental",
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- "experimental"
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- "default_context": "master",
- "id": 154,
- "name": "DRF-YASG",
- "repository_type": "github",
- "summary": "",
- "tags": [
- {
- "id": 2,
- "tag": "neuroml"
- },
- {
- "id": 1,
- "tag": "tutorial"
- },
- {
- "id": 5,
- "tag": "netpyne"
- }
- ],
- "timestamp_created": "2023-12-11 07:02:24.820214+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/axnsan12/drf-yasg",
- "user": {
- "email": "gopal@metacell.us",
- "first_name": "D. Gopal ",
- "id": "0db2937f-6534-434f-9e38-ff6ed1cbe395",
- "last_name": "Krishna",
- "username": "gopal"
- },
- "user_id": "0db2937f-6534-434f-9e38-ff6ed1cbe395"
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- "155": {
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- "content_types": "experimental",
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- "experimental"
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- "default_context": "draft",
- "id": 155,
- "name": "Multiphoton imaging in macaque visual cortex (preliminary data)",
- "repository_type": "dandi",
- "summary": "Two- and three-photon imaging from V1/V2 labeled with GCaMP6s. Grating stimuli (sf x dir).",
- "tags": [
- {
- "id": 186,
- "tag": "DANDI:000347"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 347,
- "tag": "Macaca nemestrina - Pig-tailed macaque"
- }
- ],
- "timestamp_created": "2023-12-15 17:57:29.816642+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000347/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "156": {
- "auto_sync": true,
- "content_types": "experimental",
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- "default_context": "0.240123.1806",
- "id": 156,
- "name": "Dataset of human-single neuron activity during a Sternberg working memory task.",
- "repository_type": "dandi",
- "summary": "We present a dataset of 1809 single neurons recorded from the human medial temporal lobe (amygdala and hippocampus) and medial frontal lobe (anterior cingulate cortex, pre-supplementary motor area, ventral medial prefrontal cortex) across 41 sessions from 21 patients that underwent intracranial monitoring for epileptic activity. Subjects first performed a screening task (907 neurons), based on which we identified images for which highly selective cells were present in the medial temporal lobe. Subjects then performed a working memory task (902 neurons), in which they were sequentially presented with 1-3 images, and following a maintenance period, were asked if a probe was identical to one of the currently maintained images. This Neural data without borders (NWB) formatted dataset includes spike times, extracellular spike waveforms, stimuli presented, behavior, electrode locations, and subject demographics. As validation, we replicate previous findings on the existence of concept cells and their persistent activity during working memory maintenance. This dataset provides a substantial amount of rare human single neuron recordings together with behavior, thereby enabling investigation of the neural mechanisms of working memory at the single-neuron level.\n\nThis code accompanies the following data descriptor: \n* Kyzar M, Kami\u0144ski J, Brzezicka A, Reed CM, Chung JM, Mamelak AN, Rutishauser U. Dataset of human-single neuron activity during a Sternberg working memory task. Sci Data. 2024 Jan 18;11(1):89. doi: 10.1038/s41597-024-02943-8. PMID: 38238342; PMCID: PMC10796636.\n [Link to Paper](https://pubmed.ncbi.nlm.nih.gov/38238342/)\n* Sample code to access and analyze this dataset has been provided: https://github.com/rutishauserlab/workingmem-release-NWB\n",
- "tags": [
- {
- "id": 18,
- "tag": "cognitive neuroscience"
- },
- {
- "id": 19,
- "tag": "data standardization"
- },
- {
- "id": 280,
- "tag": "working memory"
- },
- {
- "id": 22,
- "tag": "neurophysiology"
- },
- {
- "id": 23,
- "tag": "neurosurgery"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 25,
- "tag": "open source"
- },
- {
- "id": 26,
- "tag": "single-neurons"
- },
- {
- "id": 281,
- "tag": "DANDI:000469"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 262,
- "tag": "Homo sapiens - Human"
- }
- ],
- "timestamp_created": "2023-12-15 18:25:14.295269+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000469/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "157": {
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- "content_types": "experimental",
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- "default_context": "draft",
- "id": 157,
- "name": "Test",
- "repository_type": "dandi",
- "summary": "Test data",
- "tags": [
- {
- "id": 282,
- "tag": "DANDI:000470"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
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- {
- "id": 194,
- "tag": "Mus musculus - House mouse"
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- ],
- "timestamp_created": "2023-12-15 18:30:57.250975+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000470/draft",
- "user": {
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- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "165": {
- "auto_sync": true,
- "content_types": "experimental",
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- "default_context": "0.250624.0430",
- "id": 165,
- "name": "Internally organized mechanisms of the head direction sense",
- "repository_type": "dandi",
- "summary": "The head-direction (HD) system functions as a compass, with member neurons robustly increasing their firing rates when the animal's head points in a specific direction. HD neurons may be driven by peripheral sensors or, as computational models postulate, internally generated (attractor) mechanisms. We addressed the contributions of stimulus-driven and internally generated activity by recording ensembles of HD neurons in the antero-dorsal thalamic nucleus and the post-subiculum of mice by comparing their activity in various brain states. The temporal correlation structure of HD neurons was preserved during sleep, characterized by a 60\u00b0-wide correlated neuronal firing (activity packet), both within and across these two brain structures. During rapid eye movement sleep, the spontaneous drift of the activity packet was similar to that observed during waking and accelerated tenfold during slow-wave sleep. These findings demonstrate that peripheral inputs impinge on an internally organized network, which provides amplification and enhanced precision of the HD signal.",
- "tags": [
- {
- "id": 283,
- "tag": "DANDI:000056"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 193,
- "tag": "House mouse"
- }
- ],
- "timestamp_created": "2023-12-18 13:22:46.591695+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000056/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "166": {
- "auto_sync": true,
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- "default_context": "draft",
- "id": 166,
- "name": "Light sheet imaging of the human brain",
- "repository_type": "dandi",
- "summary": "This dataset contains images of 1 mm sections of human brain tissue showing nuclei, NeuN+ cells and blood vessels. Each tissue section was first SHIELD-processed for protein protection and delipidated to clear the tissue. The tissues were stained with YOYO1 (nuclei), anti-NeuN antibody (with Rhodamine Red-X secondary antibody) and Lectin (blood vessel) for 8 days in total and then optically cleared using ExPROTOS (a refractive matching solution). The sample was imaged using light sheet microscopy at a resolution of ~2.5 um x 3.6 um x 2.5 um. Each slab was imaged using multiple stacks. Offset transforms are included with the dataset to enable reconstruction of each slab.",
- "tags": [
- {
- "id": 291,
- "tag": "DANDI:000108"
- },
- {
- "id": 181,
- "tag": "DANDI"
- }
- ],
- "timestamp_created": "2023-12-18 13:28:42.711971+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000108/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "167": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "0.230602.1643",
- "id": 167,
- "name": "Oxytocin neurons enable social transmission of maternal behaviour",
- "repository_type": "dandi",
- "summary": "Maternal care, including by non-biological parents, is important for offspring survival. Oxytocin which is released by the hypothalamic paraventricular nucleus (PVN), is a critical maternal hormone. In mice, oxytocin enables neuroplasticity in the auditory cortex for maternal recognition of pup distress. However, it is unclear how initial parental experience promotes hypothalamic signalling and cortical plasticity for reliable maternal care. Here we continuously monitored the behaviour of female virgin mice co-housed with an experienced mother and litter. This documentary approach was synchronized with neural recordings from the virgin PVN, including oxytocin neurons. These cells were activated as virgins were enlisted in maternal care by experienced mothers, who shepherded virgins into the nest and demonstrated pup retrieval. Virgins visually observed maternal retrieval, which activated PVN oxytocin neurons and promoted alloparenting. Thus rodents can acquire maternal behaviour by social transmission, providing a mechanism for adapting the brains of adult caregivers to infant needs via endogenous oxytocin.",
- "tags": [
- {
- "id": 155,
- "tag": "oxytocin"
- },
- {
- "id": 292,
- "tag": "alloparenting"
- },
- {
- "id": 293,
- "tag": "maternal behavior"
- },
- {
- "id": 294,
- "tag": "DANDI:000114"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 194,
- "tag": "Mus musculus - House mouse"
- }
- ],
- "timestamp_created": "2023-12-18 13:28:48.286680+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000114/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "168": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "0.220506.1516",
- "id": 168,
- "name": "Jacobsen 2022",
- "repository_type": "dandi",
- "summary": "Data for \"All-viral tracing of monosynaptic inputs to single birthdate-defined neurons in the intact brain\", Jacobsen et al 2022. \n\nPhotostimulation laser power: sessions are labelled with the set point power. Actual power can be derived as follows: (set [mW] | actual [mW]), (20 | 7.5), (40 | 15.1)\n",
- "tags": [
- {
- "id": 299,
- "tag": "DANDI:000230"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 194,
- "tag": "Mus musculus - House mouse"
- }
- ],
- "timestamp_created": "2023-12-18 13:29:34.268901+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000230/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "169": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "0.220904.1554",
- "id": 169,
- "name": "A detailed behavioral, videographic, and neural dataset on object recognition in mice",
- "repository_type": "dandi",
- "summary": "Mice adeptly use their whiskers to touch, recognize, and learn about objects in their environment. This behavior is enabled by computations performed by populations of neurons in the somatosensory cortex. To understand these computations, we trained mice to use their whiskers to recognize different shapes while we recorded activity in the barrel cortex, which processes whisker input. Here, we present a large dataset of high-speed video of the whiskers, along with rigorous tracking of the entire extent of multiple whiskers and every contact they made on the shape. We used spike sorting to identify individual neurons, which responded with precise timing to whisker contacts and motion. These data will be useful for understanding the behavioral strategies mice use to explore objects, as well as the neuronal dynamics that mediate those strategies. In addition, our carefully curated labeled data could be used to develop new computer vision algorithms for tracking body posture, or for extracting responses of individual neurons from large-scale neural recordings. For further description, see https://www.biorxiv.org/content/10.1101/2022.05.10.491259v1.",
- "tags": [
- {
- "id": 143,
- "tag": "mouse behavior"
- },
- {
- "id": 144,
- "tag": "whisker system"
- },
- {
- "id": 145,
- "tag": "somatosensory cortex"
- },
- {
- "id": 146,
- "tag": "barrel cortex"
- },
- {
- "id": 147,
- "tag": "object recognition"
- },
- {
- "id": 148,
- "tag": "shape discrimination"
- },
- {
- "id": 35,
- "tag": "electrophysiology"
- },
- {
- "id": 149,
- "tag": "pose tracking"
- },
- {
- "id": 150,
- "tag": "population recordings"
- },
- {
- "id": 151,
- "tag": "single unit recordings"
- },
- {
- "id": 300,
- "tag": "DANDI:000231"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 194,
- "tag": "Mus musculus - House mouse"
- }
- ],
- "timestamp_created": "2023-12-18 13:29:36.767866+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000231/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "170": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "0.240510.2038",
- "id": 170,
- "name": "Rule-based modulation of a sensorimotor transformation across cortical areas",
- "repository_type": "dandi",
- "summary": "Flexible responses to sensory stimuli based on changing rules are critical for adapting to a dynamic environment. However, it remains unclear how the brain encodes and uses rule information to guide behavior. Here, we made single-unit recordings while head-fixed mice performed a cross-modal sensory selection task where they switched between two rules: licking in response to tactile stimuli while rejecting visual stimuli, or vice versa. Along a cortical sensorimotor processing stream including the primary (S1) and secondary (S2) somatosensory areas, and the medial (MM) and anterolateral (ALM) motor areas, single-neuron activity distinguished between the two rules both prior to and in response to the tactile stimulus. We hypothesized that neural populations in these areas would show rule-dependent preparatory states, which would shape the subsequent sensory processing and behavior. This hypothesis was supported for the motor cortical areas (MM and ALM) by findings that (1) the current task rule could be decoded from pre-stimulus population activity; (2) neural subspaces containing the population activity differed between the two rules; and (3) optogenetic disruption of pre-stimulus states impaired task performance. Our findings indicate that flexible action selection in response to sensory input can occur via configuration of preparatory states in the motor cortex.",
- "tags": [
- {
- "id": 301,
- "tag": "DANDI:000232"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 194,
- "tag": "Mus musculus - House mouse"
- }
- ],
- "timestamp_created": "2023-12-18 13:29:38.375239+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000232/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "171": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "0.250624.0414",
- "id": 171,
- "name": "A metabolic function of the hippocampal sharp wave-ripple",
- "repository_type": "dandi",
- "summary": "The hippocampus has previously been implicated in both cognitive and endocrine functions. We simultaneously measured electrophysiological activity from the hippocampus and interstitial glucose concentrations in the body of freely behaving rats to identify an activity pattern that may link these disparate functions of the hippocampus. Here we report that clusters of sharp wave-ripples recorded from the hippocampus reliably predicted a decrease in peripheral glucose concentrations within about 10 min. This correlation was not dependent on circadian, ultradian or meal-triggered fluctuations, could be mimicked with optogenetically induced ripples in the hippocampus (but not in the parietal cortex) and was attenuated to chance levels by pharmacogenetically suppressing activity of the lateral septum, which is the major conduit between the hippocampus and the hypothalamus. Our findings demonstrate that a function of the sharp wave-ripple is to modulate peripheral glucose homeostasis, and offer a mechanism for the link between sleep disruption and blood glucose dysregulation in type 2 diabetes.",
- "tags": [
- {
- "id": 152,
- "tag": "glucose"
- },
- {
- "id": 302,
- "tag": "ecephys"
- },
- {
- "id": 154,
- "tag": "pharmacology"
- },
- {
- "id": 303,
- "tag": "DANDI:000233"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 205,
- "tag": "Rattus norvegicus - Norway rat"
- }
- ],
- "timestamp_created": "2023-12-18 13:29:39.790200+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000233/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "172": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "0.230316.1600",
- "id": 172,
- "name": "Thermoregulatory Responses Forebrain",
- "repository_type": "dandi",
- "summary": "Imaging in the forebrain of nac -/-; Elavl3-H2B:GCaMP6s +/-; vglut2a-mCherry +/- larval zebrafish during random wave temperature stimulus presentation",
- "tags": [
- {
- "id": 304,
- "tag": "DANDI:000235"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 305,
- "tag": "Danio rerio - Zebra fish"
- }
- ],
- "timestamp_created": "2023-12-18 13:29:41.213733+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000235/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "173": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "0.230316.2031",
- "id": 173,
- "name": "Thermoregulatory Responses Midbrain",
- "repository_type": "dandi",
- "summary": "Imaging in the midbrain of nac -/-; Elavl3-H2B:GCaMP6s +/-; vglut2a-mCherry +/- larval zebrafish during random wave temperature stimulus presentation",
- "tags": [
- {
- "id": 306,
- "tag": "DANDI:000236"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 305,
- "tag": "Danio rerio - Zebra fish"
- }
- ],
- "timestamp_created": "2023-12-18 13:29:42.460396+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000236/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "174": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "0.230316.1655",
- "id": 174,
- "name": "Thermoregulatory Responses Hindbrain",
- "repository_type": "dandi",
- "summary": "Imaging in the hindbrain of nac -/-; Elavl3-H2B:GCaMP6s +/-; vglut2a-mCherry +/- larval zebrafish during random wave temperature stimulus presentation",
- "tags": [
- {
- "id": 307,
- "tag": "DANDI:000237"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 305,
- "tag": "Danio rerio - Zebra fish"
- }
- ],
- "timestamp_created": "2023-12-18 13:29:43.669483+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000237/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "175": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "0.230316.1519",
- "id": 175,
- "name": "Thermoregulatory Responses Reticulospinal system",
- "repository_type": "dandi",
- "summary": "Imaging in the hindbrain and midbrain of nac -/-; Elavl3-H2B:GCaMP6s +/- larval zebrafish after reticulospinal backfills with Texas-Red Dextran during random wave temperature stimulus presentation",
- "tags": [
- {
- "id": 308,
- "tag": "DANDI:000238"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 305,
- "tag": "Danio rerio - Zebra fish"
- }
- ],
- "timestamp_created": "2023-12-18 15:07:55.928317+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000238/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "176": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "0.230607.1752",
- "id": 176,
- "name": "Cortical processing of flexible and context-dependent sensorimotor sequences",
- "repository_type": "dandi",
- "summary": "The brain generates complex sequences of movements that can be flexibly configured based on behavioural context or real-time sensory feedback, but how this occurs is not fully understood. Here we developed a \u2018sequence licking\u2019 task in which mice directed their tongue to a target that moved through a series of locations. Mice could rapidly branch the sequence online based on tactile feedback. Closed-loop optogenetics and electrophysiology revealed that the tongue and jaw regions of the primary somatosensory (S1TJ) and motor (M1TJ) cortices encoded and controlled tongue kinematics at the level of individual licks. By contrast, the tongue \u2018premotor\u2019 (anterolateral motor) cortex encoded latent variables including intended lick angle, sequence identity and progress towards the reward that marked successful sequence execution. Movement-nonspecific sequence branching signals occurred in the anterolateral motor cortex and M1TJ. Our results reveal a set of key cortical areas for flexible and context-informed sequence generation.",
- "tags": [
- {
- "id": 309,
- "tag": "DANDI:000239"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 194,
- "tag": "Mus musculus - House mouse"
- }
- ],
- "timestamp_created": "2023-12-18 15:07:57.339803+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000239/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "177": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "draft",
- "id": 177,
- "name": "MRI of human ex vivo brainstem",
- "repository_type": "dandi",
- "summary": "This dataset contains MRI images associated with an ex vivo specimen of a human brainstem.",
- "tags": [
- {
- "id": 310,
- "tag": "DANDI:000243"
- },
- {
- "id": 181,
- "tag": "DANDI"
- }
- ],
- "timestamp_created": "2023-12-18 15:07:58.650118+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000243/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "178": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "draft",
- "id": 178,
- "name": "One photon mesoscale calcium imaging of multiple cell types",
- "repository_type": "dandi",
- "summary": "One photon dual wavelength mesoscale calcium imaging of mouse isocortex. Includes data from awake and anesthetized subjects with excitatory neuron sensitive GECIs, and data from awake subjects with GECIs sensitive to three different inhibitory interneuron cell types (PV, SOM and VIP).",
- "tags": [
- {
- "id": 311,
- "tag": "DANDI:000244"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 194,
- "tag": "Mus musculus - House mouse"
- }
- ],
- "timestamp_created": "2023-12-18 15:07:59.728244+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000244/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "179": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "draft",
- "id": 179,
- "name": "developing CaMPARI3",
- "repository_type": "dandi",
- "summary": "This dataset contains in vivo and in vitro data for the development of CaMPARI3.",
- "tags": [
- {
- "id": 312,
- "tag": "DANDI:000246"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 194,
- "tag": "Mus musculus - House mouse"
- }
- ],
- "timestamp_created": "2023-12-18 15:08:01.861963+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000246/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "180": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "draft",
- "id": 180,
- "name": "Calcium imaging of egg-laying related neurons in head-fixed Drosophila",
- "repository_type": "dandi",
- "summary": "Datasets on 2-photon calcium imaging of oviposition descending neurons (oviDNs) as head-fixed flies walk and lay eggs on an agarose-laden wheel. Each NWB file contains time series data from an individual recording session from an individual fly: imaging data, behavior data, and stimulation data (if applicable). A variety of fly genotypes and a variety of environments (egg-laying wheels) were used. Data and methods are described in \"A rise-to-threshold signal for a relative value deliberation\" (https://www.biorxiv.org/content/10.1101/2021.09.23.461548v1). Please contact Vikram Vijayan and/or Gaby Maimon for more information including different download options and different raw/processed data formats.",
- "tags": [
- {
- "id": 132,
- "tag": "Drosophila"
- },
- {
- "id": 133,
- "tag": "egg laying"
- },
- {
- "id": 134,
- "tag": "flies"
- },
- {
- "id": 20,
- "tag": "decision making"
- },
- {
- "id": 313,
- "tag": "rise-to-threshold"
- },
- {
- "id": 314,
- "tag": "DANDI:000247"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 274,
- "tag": "Drosophila melanogaster - Fruit fly"
- }
- ],
- "timestamp_created": "2023-12-18 15:08:03.096881+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000247/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "181": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "0.230423.1416",
- "id": 181,
- "name": "Innate and plastic mechanisms for maternal behaviour in auditory cortex",
- "repository_type": "dandi",
- "summary": "Infant cries evoke powerful responses in parents. Whether parental animals are intrinsically sensitive to neonatal vocalizations, or instead learn about vocal cues for parenting responses is unclear. In mice, pup-naive virgin females do not recognize the meaning of pup distress calls, but retrieve isolated pups to the nest after having been co-housed with a mother and litte. Distress calls are variable, and require co-caring virgin mice to generalize across calls for reliable retrieval. Here we show that the onset of maternal behaviour in mice results from interactions between intrinsic mechanisms and experience-dependent plasticity in the auditory cortex. In maternal females, calls with inter-syllable intervals (ISIs) from 75 to 375 milliseconds elicited pup retrieval, and cortical responses were generalized across these ISIs. By contrast, naive virgins were neuronally and behaviourally sensitized to the most common (\u2018prototypical\u2019) ISIs. Inhibitory and excitatory neural responses were initially mismatched in the cortex of naive mice, with untuned inhibition and overly narrow excitation. During co-housing experiments, excitatory responses broadened to represent a wider range of ISIs, whereas inhibitory tuning sharpened to form a perceptual boundary. We presented synthetic calls during co-housing and observed that neurobehavioural responses adjusted to match these statistics, a process that required cortical activity and the hypothalamic oxytocin system. Neuroplastic mechanisms therefore build on an intrinsic sensitivity in the mouse auditory cortex, and enable rapid plasticity for reliable parenting behaviour.",
- "tags": [
- {
- "id": 155,
- "tag": "oxytocin"
- },
- {
- "id": 315,
- "tag": "DANDI:000249"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 194,
- "tag": "Mus musculus - House mouse"
- }
- ],
- "timestamp_created": "2023-12-18 15:08:04.312017+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000249/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "182": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "draft",
- "id": 182,
- "name": "High-resolution tracking of Drosophila during egg-laying",
- "repository_type": "dandi",
- "summary": "Dataset on the egg-laying behavior of flies used to understand the egg-laying behavioral sequence. Each NWB file contains time series data from an individual fly: the x-y position of the fly, the body length of the fly, egg-deposition moments of the fly, and other behavioral annotations related to egg laying. Data and methods are described in \"A rise-to-threshold signal for a relative value deliberation\" (https://www.biorxiv.org/content/10.1101/2021.09.23.461548v1). Please contact Vikram Vijayan and/or Gaby Maimon for more information including different download options and different raw/processed data formats.",
- "tags": [
- {
- "id": 132,
- "tag": "Drosophila"
- },
- {
- "id": 133,
- "tag": "egg laying"
- },
- {
- "id": 134,
- "tag": "flies"
- },
- {
- "id": 20,
- "tag": "decision making"
- },
- {
- "id": 316,
- "tag": "behavioral sequence"
- },
- {
- "id": 317,
- "tag": "DANDI:000250"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 274,
- "tag": "Drosophila melanogaster - Fruit fly"
- }
- ],
- "timestamp_created": "2023-12-18 15:08:05.429412+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000250/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "183": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "draft",
- "id": 183,
- "name": "A Unified Framework for Dopamine Signals across Timescales",
- "repository_type": "dandi",
- "summary": "This dandiset contains the data associated with \"A Unified Framework for Dopamine Signals across Timescales\" (Kim et al. 2020). It is comprised of fiber photometry data, single-unit recordings, stimulus variables, and behavioral measurements across a wide variety of experimental manipulations. ",
- "tags": [
- {
- "id": 318,
- "tag": "DANDI:000251"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 194,
- "tag": "Mus musculus - House mouse"
- }
- ],
- "timestamp_created": "2023-12-18 15:08:06.593088+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000251/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "184": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "0.230408.2207",
- "id": 184,
- "name": "Finger_RL: human intracortical recordings during attempted finger movements of right and left hands",
- "repository_type": "dandi",
- "summary": "This dataset contains single-neuron recordings from two tetraplegic human participants as they attempted individual finger movements. One participant had an electrode array implanted in the left posterior parietal cortex (PPC) at the junction of the postcentral and intraparietal sulci (PC-IP). The other participant had one electrode array implanted in the hand knob of the left motor cortex (MC) and one electrode array implanted in the superior parietal lobule (SPL) of the left PPC.",
- "tags": [
- {
- "id": 104,
- "tag": "PPC"
- },
- {
- "id": 7,
- "tag": "human"
- },
- {
- "id": 105,
- "tag": "finger"
- },
- {
- "id": 320,
- "tag": "MC"
- },
- {
- "id": 321,
- "tag": "posterior parietal cortex"
- },
- {
- "id": 28,
- "tag": "motor cortex"
- },
- {
- "id": 322,
- "tag": "ipsilateral"
- },
- {
- "id": 323,
- "tag": "DANDI:000252"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 262,
- "tag": "Homo sapiens - Human"
- }
- ],
- "timestamp_created": "2023-12-18 16:40:26.690989+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000252/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "185": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "draft",
- "id": 185,
- "name": "20220630_AIBS_Patchseq_human",
- "repository_type": "dandi",
- "summary": "U01 Lein PatchSeq upload June 2022",
- "tags": [
- {
- "id": 27,
- "tag": "Patch-seq"
- },
- {
- "id": 7,
- "tag": "human"
- },
- {
- "id": 324,
- "tag": "DANDI:000288"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 262,
- "tag": "Homo sapiens - Human"
- }
- ],
- "timestamp_created": "2023-12-18 16:40:28.289026+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000288/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "186": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "0.220708.1652",
- "id": 186,
- "name": "UHN whole-cell patch-clamp excitability recordings from mouse cortical neurons",
- "repository_type": "dandi",
- "summary": "Whole-cell patch clamp recordings from acute mouse brain slices of layer 5 cortex.",
- "tags": [
- {
- "id": 6,
- "tag": "excitability"
- },
- {
- "id": 8,
- "tag": "cortex"
- },
- {
- "id": 29,
- "tag": "mouse"
- },
- {
- "id": 325,
- "tag": "DANDI:000292"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 194,
- "tag": "Mus musculus - House mouse"
- }
- ],
- "timestamp_created": "2023-12-18 16:40:29.692699+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000292/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "187": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "draft",
- "id": 187,
- "name": "A multi-modal fitting approach to construct single-neuron models with patch-clamp and high-density microelectrode arrays",
- "repository_type": "dandi",
- "summary": "This dataset contains simultaneous intracellular whole-cell patch clamp and extracellular high-density microelectrode array (HD-MEA) recordings.\nIt includes data from two files, corresponding to two recorded neurons. Each NWB file contains several runs of 8 eCode protocols, with syncronized intracellular voltages, stimulus currents, and extracellular voltages.",
- "tags": [
- {
- "id": 156,
- "tag": "HD-MEA, patch-clamp, multimodal"
- },
- {
- "id": 327,
- "tag": "DANDI:000294"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 205,
- "tag": "Rattus norvegicus - Norway rat"
- }
- ],
- "timestamp_created": "2023-12-18 16:40:32.060309+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000294/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "188": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "draft",
- "id": 188,
- "name": "Electrophysiological properties of adult mouse spinal cord neurons - 22Q2_Ephys_DANDI",
- "repository_type": "dandi",
- "summary": "Whole-cell patch clamp recording of specific cell types in the adult mouse spinal cord. Neurons are either input defined, output defined or expressing specific molecular markers.",
- "tags": [
- {
- "id": 328,
- "tag": "DANDI:000295"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 194,
- "tag": "Mus musculus - House mouse"
- }
- ],
- "timestamp_created": "2023-12-18 16:40:33.280263+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000295/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "189": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "draft",
- "id": 189,
- "name": "UHN whole-cell patch-clamp excitability recordings from human cortical neurons",
- "repository_type": "dandi",
- "summary": "Whole-cell current clamp recordings from surgically resected human cortical tissue ",
- "tags": [
- {
- "id": 6,
- "tag": "excitability"
- },
- {
- "id": 7,
- "tag": "human"
- },
- {
- "id": 8,
- "tag": "cortex"
- },
- {
- "id": 330,
- "tag": "DANDI:000297"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 262,
- "tag": "Homo sapiens - Human"
- }
- ],
- "timestamp_created": "2023-12-18 16:40:35.907148+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000297/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "190": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "draft",
- "id": 190,
- "name": "Stephen Test Set",
- "repository_type": "dandi",
- "summary": "asdfalsdfswadbfnk",
- "tags": [
- {
- "id": 331,
- "tag": "DANDI:000299"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 205,
- "tag": "Rattus norvegicus - Norway rat"
- }
- ],
- "timestamp_created": "2023-12-18 16:40:37.084071+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000299/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "191": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "0.230806.0034",
- "id": 191,
- "name": "Extracellular electrophysiology unit data from mouse Superior Colliculus during whisker guided virtual navigation",
- "repository_type": "dandi",
- "summary": "Spatial awareness is often intentional, arising from deliberate actions towards a target, while at other times it emerges from unexpected motion in the scene. To navigate the environment, animals must differentiate the spatial cues generated by self-motion from object movements that originate externally. To reveal the neural basis of this ability, we examined the midbrain superior colliculus (SC), which contains multiple egocentric maps of sensorimotor space. By simulating whisker-guided navigation through a dynamic landscape, we discovered a transient neural response that selectively emerged for unexpected, externally generated tactile motion. This transient response only emerged when external motion either gained or lost contact with a whisker, arguing that sensorimotor expectations are specific to a somatotopic location. When external motion sustained contact with the same whiskers, neurons shifted their spike timing to follow the dynamics of self-generated tactile features. Thus, representations based on the timing of self-generated cues may surpass the spatial acuity of the whisker array. In conclusion, the SC contains complementary rate and temporal codes to differentiate external from self-generated tactile features.",
- "tags": [
- {
- "id": 332,
- "tag": "DANDI:000301"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 194,
- "tag": "Mus musculus - House mouse"
- }
- ],
- "timestamp_created": "2023-12-18 16:40:38.322603+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000301/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "192": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "draft",
- "id": 192,
- "name": "Habenular neurophysiology",
- "repository_type": "dandi",
- "summary": "Habenular neurophysiology data associated with Sylwestrak*, Jo*, Vesuna* et al. Cell (2022).",
- "tags": [
- {
- "id": 333,
- "tag": "DANDI:000302"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 194,
- "tag": "Mus musculus - House mouse"
- }
- ],
- "timestamp_created": "2023-12-18 16:40:39.600170+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000302/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "193": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "draft",
- "id": 193,
- "name": "20220917_AIBS_Patchseq_human",
- "repository_type": "dandi",
- "summary": "U01 Lein PatchSeq upload March 2022 - Mansvelder lab data",
- "tags": [
- {
- "id": 334,
- "tag": "DANDI:000337"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 262,
- "tag": "Homo sapiens - Human"
- }
- ],
- "timestamp_created": "2023-12-18 16:40:40.883439+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000337/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "194": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "draft",
- "id": 194,
- "name": "groupweight BMI",
- "repository_type": "dandi",
- "summary": "This dataset is the group-weight BMI experiment data. ",
- "tags": [
- {
- "id": 335,
- "tag": "BCI BMI"
- },
- {
- "id": 336,
- "tag": "DANDI:000338"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 210,
- "tag": "Macaca mulatta - Rhesus monkey"
- }
- ],
- "timestamp_created": "2023-12-18 16:40:42.177845+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000338/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "195": {
- "auto_sync": true,
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- "id": 195,
- "name": "Local Field Potential Recordings in the Primary Somatosensory Cortex before and after Transcranial Focused Ultrasound Stimulation in Rats",
- "repository_type": "dandi",
- "summary": "In this study, we investigate how transcranial focused ultrasound (tFUS) modulates neural interaction and response to peripheral electrical stimulation at hindlimb through intracranial multi-electrode recordings in the rat somatosensory cortex. Recordings were performed using a 32-channel NeuroNexus\u00ae multi-electrode array. Rats were anesthetized using isoflurane at 2%. Recordings were taken while delivering peripheral electrical stimulation once every 5 seconds to analyze the neural response in the rat S1HL region, before ultrasound for 30 minutes and then afterwards for an hour, in order to determine how the ultrasound modulated the electrical stimulation induced local field potential (LFP) waveforms. We delivered ultrasound for 5 minutes in a pulsed pattern at 5 levels of sonication repetition frequencies (SRF) (10 Hz, 50 Hz, 75 Hz, 100 Hz, and 125 Hz) to induce frequency dependent plasticity in a manner similar to that is found following tetanic electrical stimulation. We investigated whether delivering tFUS that alters connectivity/correlation between the targeted neurons may alter collective responses manifested in the modulated LFP waveforms. The applied fundamental frequency of ultrasound was 0.5 MHz, the pulse repetition frequency (PRF) was 3 kHz, and the total duty cycle was 36%. This dataset contains LFP recordings, with 32 channels for each datafile.\nIn each subject, recordings are provided with \"pre\" and \"post\" tFUS for two different frequencies (SRF), and most contain recordings during the delivery of ultrasound and during rest periods between sessions of different ultrasound parameters. For example, a single subject may include \"100Hz_pre\", \"100Hz_post\", \"50Hz_pre\", \"50Hz_post\", which are the pre and post tFUS recordings for the two used parameters, and then \"50Hz\" and \"100Hz\", which are the recordings taken during stimulation, and \"rest1\" and \"rest2\", which are the rest periods between sessions. These names are preceded by a label such as \"BH280\", which is the animal subject label. Ultrasound is delivered in a continuous paradigm, with pulses delivered at the stimulation repetition frequency continuously throughout the 5 minutes of stimulation. During the \"pre\" and \"post\" recordings, the peripheral electrical stimulation is delivered once every 5 seconds approximately. Electrical stimulation event trigger is not included in the dataset as it was not recorded due to using a separate system to deliver the electrical stimulation. We were using threshold detection on a channel of LFP recordings in order to detect the electrical stimulation events, in which events can be recognized by the quick rising of voltage. One could also approximate it by detecting the first event, and then add periods of 5 seconds to generate the rest of the trigger times.\nMore details about the experimental details can be found in our paper published by Journal of Neural Engineering (DOI: 10.1088/1741-2552/ac889f).",
- "tags": [
- {
- "id": 119,
- "tag": "Ultrasound"
- },
- {
- "id": 122,
- "tag": "tFUS"
- },
- {
- "id": 120,
- "tag": "Plasticity"
- },
- {
- "id": 337,
- "tag": "Somatosensory"
- },
- {
- "id": 121,
- "tag": "Rat"
- },
- {
- "id": 123,
- "tag": "Somatosensory Cortex"
- },
- {
- "id": 338,
- "tag": "DANDI:000339"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 205,
- "tag": "Rattus norvegicus - Norway rat"
- }
- ],
- "timestamp_created": "2023-12-18 16:40:43.497224+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000339/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "196": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
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- ],
- "default_context": "0.241220.1312",
- "id": 196,
- "name": "Temporal disparity of action potentials triggered in axon initial segments and distal axons in the neocortex",
- "repository_type": "dandi",
- "summary": "Patch-clamp recordings of Layer 1 interneurons in the human and rodent neocortex. Data comes from Gabor Tamas Lab (ELKH-SZTE Research Group for Cortical Microcircuits; University of Szeged, Hungary).",
- "tags": [
- {
- "id": 339,
- "tag": "Layer 1 interneurons"
- },
- {
- "id": 7,
- "tag": "human"
- },
- {
- "id": 340,
- "tag": "rodent"
- },
- {
- "id": 341,
- "tag": "in vitro"
- },
- {
- "id": 342,
- "tag": "in vivo"
- },
- {
- "id": 343,
- "tag": "Retroaxonal firing"
- },
- {
- "id": 344,
- "tag": "Persistent firing"
- },
- {
- "id": 345,
- "tag": "Retoaxonal action potentials"
- },
- {
- "id": 346,
- "tag": "DANDI:000341"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 205,
- "tag": "Rattus norvegicus - Norway rat"
- }
- ],
- "timestamp_created": "2023-12-18 16:40:44.762552+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000341/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "197": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
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- "default_context": "0.221208.1803",
- "id": 197,
- "name": "Scalable Thousand Channel Penetrating Microneedle Arrays on Flex for Multimodal and Large Area Coverage BrainMachine Interfaces",
- "repository_type": "dandi",
- "summary": "The Utah array powers cutting-edge projects for restoration of neurological function, such as BrainGate, but the underlying electrode technology has itself advanced little in the last three decades. Here, advanced dual-side lithographic microfabrication processes is exploited to demonstrate a 1024-channel penetrating silicon microneedle array (SiMNA) that is scalable in its recording capabilities and cortical coverage and is suitable for clinical translation. The SiMNA is the first penetrating microneedle array with a flexible backing that affords compliancy to brain movements. In addition, the SiMNA is optically transparent permitting simultaneous optical and electrophysiological interrogation of neuronal activity. The SiMNA is used to demonstrate reliable recordings of spontaneous and evoked field potentials and of single unit activity in chronically implanted mice for up to 196 days in response to optogenetic and to whisker air-puff stimuli. Significantly, the 1024-channel SiMNA establishes detailed spatiotemporal mapping of broadband brain activity in rats. This novel scalable and biocompatible SiMNA with its multimodal capability and sensitivity to broadband brain activity will accelerate the progress in fundamental neurophysiological investigations and establishes a new milestone for penetrating and large area coverage microelectrode arrays for brain\u2013machine interfaces.",
- "tags": [
- {
- "id": 351,
- "tag": "DANDI:000398"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 194,
- "tag": "Mus musculus - House mouse"
- }
- ],
- "timestamp_created": "2023-12-18 16:40:52.742527+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000398/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "198": {
- "auto_sync": true,
- "content_types": "experimental",
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- ],
- "default_context": "draft",
- "id": 198,
- "name": "All-optical physiology resolves a synaptic basis for behavioral time scale plasticity",
- "repository_type": "dandi",
- "summary": "Data included in Fan (2022) Cell",
- "tags": [
- {
- "id": 352,
- "tag": "DANDI:000399"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 194,
- "tag": "Mus musculus - House mouse"
- }
- ],
- "timestamp_created": "2023-12-18 16:40:53.885144+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000399/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "199": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "0.230307.2132",
- "id": 199,
- "name": "MICrONS Two Photon Functional Imaging",
- "repository_type": "dandi",
- "summary": "The light microscopic images were acquired from a cubic millimeter volume that spanned portions of primary visual cortex and three higher visual cortical areas. The volume was imaged in vivo by two-photon random access mesoscope (2P-RAM) from postnatal days P75 to P81 in a male mouse expressing a genetically encoded calcium indicator in excitatory cells, while the mouse viewed natural movies and parametric stimuli. The calcium imaging data includes the single-cell responses of an estimated 75,000 pyramidal cells imaged over a volume of approximately 1200 x 1100 x 500 \u03bcm3 (anteroposterior x mediolateral x radial depth). The center of the volume was placed at the junction of primary visual cortex (VISp) and three higher visual areas, lateromedial area (VISlm), rostrolateral area (VISrl) and anterolateral area (VISal). During imaging, the animal was head-restrained, and the stimulus was presented to the left visual field. Treadmill rotation (single axis) and video of the animal's left eye were captured throughout the scan, yielding the locomotion velocity, eye movements, and pupil diameter data included here.\n\nThe functional data were co-registered with electron microscopy (EM) data. The structural identifiers of the matched cells are added as plane segmentation columns extracted from the CAVE database. To access the latest revision see the notebook that is linked to this dandiset. The structural ids might not be present for all plane segmentations.",
- "tags": [
- {
- "id": 353,
- "tag": "DANDI:000402"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 194,
- "tag": "Mus musculus - House mouse"
- }
- ],
- "timestamp_created": "2023-12-18 16:40:55.290483+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000402/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "200": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "0.230605.2024",
- "id": 200,
- "name": "Monkey 2D cursor BMI",
- "repository_type": "dandi",
- "summary": "This dataset includes binned spike count data (chronic microwire arrays in PMd/M1) and brain-machine-interface behavioral data (2D cursor kinematics, target locations, trials) from Athalye, V*, Khanna, P*, Gowda S, Orsborn, AL, Costa RM**, Carmena, JC**, (2023) \"Invariant neural dynamics drive commands to control different movements\": https://www.biorxiv.org/content/10.1101/2021.08.27.457931v2. \n\nFor more information about this data, please contact Vivek Athalye and/or Preeya Khanna. \n\nCode for analyzing this data and re-creating manuscript figures is located: https://github.com/pkhanna104/bmi_dynamics_code and archived at https://zenodo.org/record/8006653",
- "tags": [
- {
- "id": 354,
- "tag": "neural population dynamics"
- },
- {
- "id": 28,
- "tag": "motor cortex"
- },
- {
- "id": 355,
- "tag": "motor control"
- },
- {
- "id": 356,
- "tag": "brain-machine interface"
- },
- {
- "id": 357,
- "tag": "neuroprosthetics"
- },
- {
- "id": 358,
- "tag": "optimal feedback control"
- },
- {
- "id": 359,
- "tag": "motor commands"
- },
- {
- "id": 360,
- "tag": "movement representations"
- },
- {
- "id": 361,
- "tag": "dynamical systems"
- },
- {
- "id": 362,
- "tag": "DANDI:000404"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 210,
- "tag": "Macaca mulatta - Rhesus monkey"
- }
- ],
- "timestamp_created": "2023-12-18 16:40:56.859123+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000404/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "201": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "draft",
- "id": 201,
- "name": "Gonzalez & Giocomo (2022) Parahippocampal neurons encode task-relevant information for goal-directed navigation",
- "repository_type": "dandi",
- "summary": "Data used in the Gonzalez & Giocomo (2022) manuscript. This contains session electrophysiological data and accompanying event metadata/time-series necessary to generate figures in the manuscript. Github link contains metadata files that contain information for each session, including if it is an open-field foraging session or a Tree-Maze session, and how many units were collected in it. Additional metadata includes unit matching across session and a detailed behavioral performance table.\n\nPre-print DOI: \nhttps://doi.org/10.1101/2022.12.15.520660\n\nGithub:\nhttps://github.com/alexgonzl/TMA\n",
- "tags": [
- {
- "id": 363,
- "tag": "DANDI:000405"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 205,
- "tag": "Rattus norvegicus - Norway rat"
- }
- ],
- "timestamp_created": "2023-12-18 16:40:58.009663+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000405/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "202": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "draft",
- "id": 202,
- "name": "IBL - Brain Wide Map [deprecated]",
- "repository_type": "dandi",
- "summary": "The International Brain lab (IBL) aims to understand the neural basis of decision-making in the mouse by gathering a whole-brain activity map composed of electrophysiological recordings pooled from multiple laboratories. We have systematically recorded from nearly all major brain areas with Neuropixels probes, using a grid system for unbiased sampling and replicating each recording site in at least two laboratories. These data have been used to construct a brain-wide map of activity at single-spike cellular resolution during a decision-making task. In addition to the map, this data set contains other information gathered during the task: sensory stimuli presented to the mouse; mouse decisions and response times; and mouse pose information from video recordings and DeepLabCut analysis.",
- "tags": [
- {
- "id": 80,
- "tag": "International Brain Laboratory"
- },
- {
- "id": 364,
- "tag": "multi-probe"
- },
- {
- "id": 365,
- "tag": "Neuropixels"
- },
- {
- "id": 366,
- "tag": "Allen Mouse Brain CCFv3"
- },
- {
- "id": 367,
- "tag": "Allen Mouse Brain Atlas"
- },
- {
- "id": 368,
- "tag": "head-fixed"
- },
- {
- "id": 84,
- "tag": "decision-making"
- },
- {
- "id": 369,
- "tag": "face-tracking"
- },
- {
- "id": 370,
- "tag": "DANDI:000409"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 194,
- "tag": "Mus musculus - House mouse"
- }
- ],
- "timestamp_created": "2023-12-18 16:40:59.347570+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000409/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "203": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "draft",
- "id": 203,
- "name": "Joshi et al (2023) Dynamic Synchronization between Hippocampal Spatial Representations and the Stepping Rhythm",
- "repository_type": "dandi",
- "summary": "This dateset includes electrophysiological data from from dorsal CA1 of rats running on a linear or w-shaped track. Please contact Abhilasha Joshi or Loren Frank for more information about this data. ",
- "tags": [
- {
- "id": 371,
- "tag": "DANDI:000410"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 205,
- "tag": "Rattus norvegicus - Norway rat"
- }
- ],
- "timestamp_created": "2023-12-18 16:41:00.569329+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000410/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "204": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "draft",
- "id": 204,
- "name": "test",
- "repository_type": "dandi",
- "summary": "It is a test to use DANDI archive, like hello world. I will not upload any neural data in this set.",
- "tags": [
- {
- "id": 372,
- "tag": "DANDI:000411"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 194,
- "tag": "Mus musculus - House mouse"
- }
- ],
- "timestamp_created": "2023-12-18 16:41:01.735553+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000411/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "205": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "0.250724.2224",
- "id": 205,
- "name": "Novel-familiar-novel WTrack (CA1-PFC)",
- "repository_type": "dandi",
- "summary": "Hippocampal-prefrontal recordings in rats (dorsal CA1 region of the hippocampus and primarily the prelimbic region of prefrontal cortex) during exposure to novel and familiar WTrack environments. Data includes spikes from single units, local field potential recordings, position (x, y, velocity), and trajectory information. Each file contains data from 3 behavioral epochs - Novel Wtrack (first exposure) - Familiar WTrack - Novel WTrack (second exposure)",
- "tags": [
- {
- "id": 373,
- "tag": "Hippocampus, Prefrontal cortex, Learning, Memory, Decision making"
- },
- {
- "id": 374,
- "tag": "DANDI:000447"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 205,
- "tag": "Rattus norvegicus - Norway rat"
- }
- ],
- "timestamp_created": "2023-12-18 16:41:02.889249+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000447/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "206": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "0.230421.1844",
- "id": 206,
- "name": "Time kinetics of the membrane potential at the cathode- and anode-facing poles of a cell induced by a train of 5 pulses at 833 kHz",
- "repository_type": "dandi",
- "summary": "Time-lapse recordings for the investigation of the relationship between the electroporation efficiency of nsEP and changes in the transmembrane potential (TMP). A strobe imaging synchronized with nsEP exposure was used. This allowed studying the nanosecond kinetics of TMP charging and relaxation, which is the primary effect of nsEP that rapidly charges the plasma membrane. The methodology involved pulsed laser fluorescence microscopy with voltage-sensitive FluoVolt dye-loaded cells that respond to TMP changes within nanoseconds. FluoVolt has a high sensitivity of about 10 % deltaF/F per 100 mV. During the imaging, a single short pulse laser flash is delivered at a precise time interval (addition of 25ns in each frame) before, during, or after nsEP exposure. The camera shutter opens in advance of and closes after the laser flash, capturing one TMP image per nsEP exposure. Supported by NIH 1R21EY034258",
- "tags": [
- {
- "id": 375,
- "tag": "DANDI:000448"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 376,
- "tag": "Cricetulus griseus - Cricetulus aureus"
- }
- ],
- "timestamp_created": "2023-12-18 16:41:04.313793+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000448/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "default_context": "0.230302.2331",
- "id": 207,
- "name": "Guide to the construction and use of an adaptive optics two-photon microscope with direct wavefront sensing",
- "repository_type": "dandi",
- "summary": "Two-photon microscopy, combined with appropriate optical labeling, has enabled the study of structure and function throughout animals and their organ systems, especially nervous systems. This methodology enables, for example, the measurement and tracking of sub-micrometer structures within brain cells, the spatio-temporal mapping of spikes in individual neurons, and the spatio-temporal mapping of transmitter release in individual synapses. Yet the spatial resolution of two-photon microscopy rapidly degrades as imaging is attempted at depths more than a few scattering lengths into tissue, i.e., below the superficial layers that constitute the top 300 to 400\u00a0\u00b5m of neocortex. To obviate this limitation, we measure the wavefront of the guide star at the focus of the excitation beam and utilize adaptive optics that alters the incident wavefront to achieve an improved focal volume. We describe the construction, calibration, and operation of a two-photon microscope that incorporates adaptive optics to restore diffraction-limited resolution throughout the nearly 900\u00a0\u00b5m depth of mouse cortex. Our realization utilizes a guide star formed by excitation of red-shifted dye within the blood serum to directly measure the wavefront. We incorporate predominantly commercial optical, optomechanical, mechanical, and electronic components; computer aided design models of the exceptional custom components are supplied. The resultant adaptive-optics two-photon microscope is modular and allows for expanded imaging and optical excitation capabilities. We demonstrate our methodology in mouse neocortex by imaging the morphology of somatostatin-expressing neurons that lie 700 \u00b5m beneath the pia, calcium dynamics of layer 5b projection neurons, and thalamocortical glutamate transmission to L4 neurons.",
- "tags": [
- {
- "id": 377,
- "tag": "DANDI:000454"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 194,
- "tag": "Mus musculus - House mouse"
- }
- ],
- "timestamp_created": "2023-12-18 16:41:05.507459+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000454/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "id": 208,
- "name": "Simultaneous electroencephalography, extracellular electrophysiology, and cortical electrical stimulation in head-fixed mice",
- "repository_type": "dandi",
- "summary": "In this set of experiments, we recorded neural signals using an electroencephalography (EEG) array and Neuropixels probes while directly electrically stimulating the cortex in awake and anesthetized head-fixed mice. Details of the experiments can be found in the associated manuscript (Claar, Rembado et al., 2023). Briefly, the recordings and stimulation commenced while the mouse was awake, free to rest or move on a rotating disc. After delivering a series of stimuli, anesthesia was induced with isoflurane (5% via inhalation). Once a surgical level of anesthesia was reached, the mouse was maintained unconscious (1-1.5% isoflurane) during the delivery of another series of stimuli. In some subjects another series of stimuli was delivered after the isoflurane was turned off, this epoch/state is referred to as \u201crecovery\u201d in the dataset.\n\nEach session file includes the following data: raw EEG signals from all 30 surface electrodes and the associated electrode information; raw LFP signals from all electrodes on all Neuropixels probes (if used) and the associated electrode information; spike times for all units (spike sorted with Kilosort 2.0) that passed our quality threshold with associated information (brain region, spike waveform duration, etc.); subject\u2019s speed computed from the rotation of the disc for the entire session; epochs marking when isoflurane was induced and when it was maintained; and a trial table containing information about every stimulus delivered throughout the session.\n\nAll sessions included an awake and an isoflurane epoch, but not all sessions included a recovery epoch. Some subjects received visual stimulation trials (visual stimuli presented on a screen in the subject\u2019s right field of view) interleaved with the electrical stimulation trials.",
- "tags": [
- {
- "id": 378,
- "tag": "EEG"
- },
- {
- "id": 365,
- "tag": "Neuropixels"
- },
- {
- "id": 379,
- "tag": "electrical stimulation"
- },
- {
- "id": 380,
- "tag": "brain states"
- },
- {
- "id": 381,
- "tag": "cortico-thalamic interactions"
- },
- {
- "id": 52,
- "tag": "extracellular electrophysiology"
- },
- {
- "id": 382,
- "tag": "DANDI:000458"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 194,
- "tag": "Mus musculus - House mouse"
- }
- ],
- "timestamp_created": "2023-12-18 16:41:06.667095+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000458/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "209": {
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- "default_context": "draft",
- "id": 209,
- "name": "Cohen Tickertapes Exploratory Data 1",
- "repository_type": "dandi",
- "summary": "Exploratory dataset for the second generation of molecular tickertapes in the Adam Cohen Lab.",
- "tags": [
- {
- "id": 383,
- "tag": "DANDI:000461"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 384,
- "tag": "Canis lupus familiaris - Dog"
- }
- ],
- "timestamp_created": "2023-12-18 16:41:07.984083+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000461/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "210": {
- "auto_sync": true,
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- "default_context": "0.230416.2132",
- "id": 210,
- "name": "HippocampusRewardDataset",
- "repository_type": "dandi",
- "summary": "Dataset that applies to the paper.\nKrishnan, S., Heer, C., Cherian, C. et al. Nat Commun 13, 6662 (2022). https://doi.org/10.1038/s41467-022-34465-5\n\nUploaded datasets include data from WT mice where mice underwent a reward expectation extinction task as described in Figures 1-3. Four datasets with DREADD manipulation of VTA dopaminergic neurons and controls are also included as described in Figure 4. All datasets are processed raw fluorescence obtained from suite2p. Behavior data is also included.\n\nScripts used for analysis can be found on https://github.com/seethakris/HPCrewardpaper",
- "tags": [
- {
- "id": 385,
- "tag": "hippocampus; dopamine; mice; reward; calcium imaging; VR based navigation; DREADD"
- },
- {
- "id": 386,
- "tag": "DANDI:000462"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 194,
- "tag": "Mus musculus - House mouse"
- }
- ],
- "timestamp_created": "2023-12-18 16:41:09.224047+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000462/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "211": {
- "auto_sync": true,
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- "id": 211,
- "name": "Electrophysiological Recordings in Anesthetized Rats in the Primary Somatosensory Cortex with Phased Ultrasound Array Stimulation",
- "repository_type": "dandi",
- "summary": "In these recordings, we test different intensities and PRFs (pulse repetition frequencies) of ultrasound stimulation using a phased ultrasound array to stimulate the somatosensory cortex of rats anesthetized with 2% isoflurane through inhalation. Recordings are taken using 32 channel Neuronexus electrodes. Ultrasound stimulation is delivered every 2.5 seconds, and each recording has either 200 or 500 trials. Detailed description about this dataset can be found in the following publication. Please cite the paper if you would use a portion of the dataset. Gao, H., Ramachandran, S., Yu, K., & He, B. (2025). Transcranial Focused Ultrasound Modulates Feedforward and Feedback Cortico-Thalamo-Cortical Pathways by Selectively Activating Excitatory Neurons. The Journal of Neuroscience, 45(23), e2218242025. https://doi.org/10.1523/JNEUROSCI.2218-24.2025",
- "tags": [
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- "id": 387,
- "tag": "DANDI:000463"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 205,
- "tag": "Rattus norvegicus - Norway rat"
- }
- ],
- "timestamp_created": "2023-12-18 16:41:10.304293+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000463/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "212": {
- "auto_sync": true,
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- "default_context": "0.230530.2349",
- "id": 212,
- "name": "Human brain mapping with multithousand-channel PtNRGrids resolves spatiotemporal dynamics",
- "repository_type": "dandi",
- "summary": "This dataset contains recordings from PtNRGrids, which are devices designed to record electrocorticography (ECoG) activities from the brain surface at high-spatial resolution. PtNRGrids used here were a square-shaped array with 1024 channels and a 150-\u00b5m pitch, which was implanted to record neural activity from the entire right primary somatosensory barrel cortex. The sensory response on the brain was evoked by delivering air puffs through a microcapillary tube to individually stimulate individual whiskers on the contralateral side. This dataset demonstrates the high-spatial resolution recording capability of PtNRGrids isolate functional cortical columns in sub-mm resolution from the surface of the brain.\n\n[Publication corresponding to this dataset] Tchoe, Youngbin, et al. \"Human brain mapping with multithousand-channel PtNRGrids resolves spatiotemporal dynamics.\" Science translational medicine 14.628 (2022): eabj1441.\n[Electrode mapping information & Basic analysis codes] Github: https://ytchoe.github.io/",
- "tags": [
- {
- "id": 388,
- "tag": "micro-ECoG, barrel cortex, high gamma activity"
- },
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- "id": 389,
- "tag": "DANDI:000465"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 205,
- "tag": "Rattus norvegicus - Norway rat"
- }
- ],
- "timestamp_created": "2023-12-18 16:41:11.470240+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000465/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "213": {
- "auto_sync": true,
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- "id": 213,
- "name": "Sparse and stereotyped encoding implicates a core glomerulus for ant alarm behavior",
- "repository_type": "dandi",
- "summary": "In these experiments, we recorded odor-evoked calcium responses in the antennal lobe of the clonal raider ant (Ooceraea biroi). Transgenic ants expressed GCaMP6s in olfactory sensory neurons, and the right antennal lobe was imaged using a two-photon microscope. A piezo device and resonant scanning galvanometer were used to image whole-antennal lobe volumes at a rate of 0.83 volumes per second. 33 z-planes were imaged at 5 micrometer intervals. In each recording, odor stimulus commenced after 3s and lasted for 5s. Negative control: paraffin oil. General odorant stimuli: isopropanol, ethylpyrazine, ethanol, 3-hexanone, propionic acid. Ant alarm pheromones: 4-methyl-3-heptanone, 4-methyl-3-heptanol, 4-methyl-3-hexanol, 6-methyl-5-hepten-2-one.\n\nExperiment key:\nGeneral odorant experiment subjects:\nsub-ant1-m10-d6-y2022\nsub-ant3-m10-d6-y2022\nsub-ant1-m10-d11-y2022\nsub-ant2-m10-d11-y2022\nsub-ant3-m10-d11-y2022\nsub-ant5-m10-d11-y2022\n\nBilateral antennal lobe imaging experiment subjects:\nsub-ant2-m2-d10-y2023\nsub-ant3-m2-d10-y2023\nsub-ant4-m2-d10-y2023\n\nUnilateral alarm pheromone imaging experiment subjects:\nsub-ant2-m4-d20-y2022\nsub-ant4-m4-d20-y2022\nsub-ant1-m4-d21-y2022\nsub-ant2-m4-d21-y2022\nsub-ant3-m4-d21-y2022\nsub-ant1-m4-d26-y2022\nsub-ant2-m4-d26-y2022\nsub-ant3-m4-d26-y2022\nsub-ant4-m4-d26-y2022\nsub-ant5-m4-d26-y2022\nsub-ant1-m4-d27-y2022\nsub-ant2-m4-d27-y2022\nsub-ant3-m4-d27-y2022",
- "tags": [
- {
- "id": 390,
- "tag": "antennal lobe; calcium imaging; chemosensation; clonal raider ant; communication; GCaMP; odor coding; olfaction; Ooceraea biroi; pheromone"
- },
- {
- "id": 391,
- "tag": "DANDI:000467"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 392,
- "tag": "Ooceraea biroi - Clonal raider ant"
- }
- ],
- "timestamp_created": "2023-12-18 16:41:12.816150+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000467/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "214": {
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- "id": 214,
- "name": "NeuroPAL volumetric images",
- "repository_type": "dandi",
- "summary": "Partially labeled NeuroPAL volumetric images produced by the Kato lab at UCSF as part of an effort to add to the corpus of existing labeled data to facilitate the development of automatic cell identification algorithms. We hope that making these datasets more easily accessible in a centralized location like DANDI will significantly speed up development by allowing new researchers to start working on algorithms without the need to build up their own full dataset of training data beforehand. \n\nAs part of this effort, we also propose a novel extension to the NWB data format to allow for multichannel volumetric data.\n\nContents:\n\nSubject (C. elegans subject) - contains relevant metadata about the experimental subject\n\nAcquisition, \"NeuroPALImageRaw\" (MultiChannelVolume) - contains the raw image and associated metadata with dimensions (X, Y, Z, C)\n\nProcessing, \"NeuroPAL\", \"VolumeSegmentation\" (VolumeSegmentation) - contains a list of neuron centers and associated IDs (X, Y, Z, weight, ID)\n\nProcessing, \"NeuroPAL\", \"ImagingVolume\" (ImagingVolume) - contains the metadata associated with the imaging acquisition\n\nProcessing, \"NeuroPAL\", \"OpticalChannelRefs\" (OpticalChannelReferences) - contains the order of the optical channels in the image\n\nProcessing, \"ProcessedImage\", \"Hist_match_med_filt\" - contains the processed NeuroPAL image with dimensions (X,Y,Z,C)",
- "tags": [
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- "id": 393,
- "tag": "DANDI:000472"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 394,
- "tag": "Caenorhabditis elegans"
- }
- ],
- "timestamp_created": "2023-12-18 16:51:25.267811+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000472/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "215": {
- "auto_sync": true,
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- "id": 215,
- "name": "Esr1+ hypothalamic-habenula neurons shape aversive states.",
- "repository_type": "dandi",
- "summary": "Prefrontal cortex (PFC) high-density extracellular recordings (Neuropixels) in head-fixed mice during an aversive-conditioning task. Neuronal responses to internally generated (i.e. pathway-specific optogenetic activation, see the main article for details) and externally derived (i.e. air puffs) aversive signals have been recorded.",
- "tags": [
- {
- "id": 365,
- "tag": "Neuropixels"
- },
- {
- "id": 79,
- "tag": "Mouse"
- },
- {
- "id": 395,
- "tag": "Head-fixed"
- },
- {
- "id": 396,
- "tag": "Lateral Hypothalamus"
- },
- {
- "id": 397,
- "tag": "Lateral Habenula"
- },
- {
- "id": 398,
- "tag": "Prefrontal cortex"
- },
- {
- "id": 399,
- "tag": "Aversion"
- },
- {
- "id": 400,
- "tag": "DANDI:000473"
- },
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- "id": 181,
- "tag": "DANDI"
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- {
- "id": 24,
- "tag": "NWB"
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- "id": 194,
- "tag": "Mus musculus - House mouse"
- }
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- "timestamp_created": "2023-12-18 16:51:26.503022+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000473/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "id": 216,
- "name": "State-dependent processing in visual cortex",
- "repository_type": "dandi",
- "summary": "Extracellular recordings from rabbit visual cortex neurons. Orientation testing with drifting grating stimuli. Hippocampal EEG for the state scoring procedure. ",
- "tags": [
- {
- "id": 401,
- "tag": "electrophysiology, signal processing"
- },
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- "id": 402,
- "tag": "DANDI:000481"
- },
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- "id": 181,
- "tag": "DANDI"
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- {
- "id": 24,
- "tag": "NWB"
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- "id": 403,
- "tag": "Oryctolagus cuniculus - Rabbits"
- }
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- "timestamp_created": "2023-12-18 16:51:28.041587+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000481/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "content_types": "experimental",
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- ],
- "default_context": "draft",
- "id": 217,
- "name": "State-dependent processing in visual cortex",
- "repository_type": "dandi",
- "summary": "Test upload. Extracellular recordings from rabbit visual cortex neurons. Orientation testing with drifting grating stimuli. Hippocampal EEG for the state scoring procedure.",
- "tags": [
- {
- "id": 404,
- "tag": "DANDI:000482"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 403,
- "tag": "Oryctolagus cuniculus - Rabbits"
- }
- ],
- "timestamp_created": "2023-12-18 16:51:29.171313+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000482/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "218": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
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- "default_context": "0.230421.2321",
- "id": 218,
- "name": "Dataset for \"Coregistration of heading to visual cues in retrosplenial cortex\"",
- "repository_type": "dandi",
- "summary": "These are all the accompanying data for the following publication:\nSit, K.K., Goard, M.J. Coregistration of heading to visual cues in retrosplenial cortex. Nat Commun 14, 1992 (2023). https://doi.org/10.1038/s41467-023-37704-5",
- "tags": [
- {
- "id": 405,
- "tag": "DANDI:000483"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 194,
- "tag": "Mus musculus - House mouse"
- }
- ],
- "timestamp_created": "2023-12-18 16:51:30.385064+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000483/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "219": {
- "auto_sync": true,
- "content_types": "experimental",
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- "default_context": "0.230602.2022",
- "id": 219,
- "name": "Allen Institute Openscope - Differential encoding of temporal context and expectation",
- "repository_type": "dandi",
- "summary": "This dataset was collected for the Predictive Coding project, as part of the Allen Institute for Brain Science's OpenScope project. \n\nThe experimental design involved visual stimulation with sequences of 4 natural scene images (ABCD) that are repeated many times, with an occasional rare oddball image in the 4th place in the sequence (ABCX). There are 10 unique oddball images which are each shown 10 times during the recording session. The main sequence (ABCD) is shown thousands of times. In addition to the oddball blocks there are control conditions where the 4 main sequence images and 10 oddball images are shown either entirely randomly, or where pairwise image transitions are maintained, but the overall sequence is shuffled (example pairs: AB, BC, CD, CX, XA, etc). \n\nDuring this stimulus paradigm, 2-photon calcium imaging was used to record neural activity in three cortical areas (one area per recording session): the primary visual cortex, higher order visual area PM, and the retrosplenial cortex, across multiple cortical depths. During the recordings, mice were free to run on a circular disk and running speed was measured, along with pupil diameter and eye position. In each mouse, two of the three areas were imaged, and the third had a retrograde tracer (rAAV-mRuby2) injected to label inputs to that region. No differences in physiology were identified between retrogradely labeled and non-labeled neurons, thus this information was not included in the primary study of this dataset. \n\nResults are provided in the form of normalized calcium traces (dF/F) for all recorded neurons, along with running speed, pupil measurements, and the timing of all stimulus events. ",
- "tags": [
- {
- "id": 40,
- "tag": "neocortex"
- },
- {
- "id": 58,
- "tag": "pyramidal neurons"
- },
- {
- "id": 63,
- "tag": "two-photon calcium imaging"
- },
- {
- "id": 64,
- "tag": "mouse VisP"
- },
- {
- "id": 65,
- "tag": "prediction"
- },
- {
- "id": 406,
- "tag": "predictive coding"
- },
- {
- "id": 407,
- "tag": "DANDI:000488"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 194,
- "tag": "Mus musculus - House mouse"
- }
- ],
- "timestamp_created": "2023-12-18 16:51:31.724978+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000488/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "220": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "0.230518.1811",
- "id": 220,
- "name": "The impact of the second phase amplitude (% to the first phase) on the electroporation efficiency (measured as YP emission)",
- "repository_type": "dandi",
- "summary": "Cells were electroporated by a train of 5 unipolar 600 ns pulses (0 percent) or bipolar 600 + 600 ns pulses (25, 50, 75, 100 percent) at 1 Hz. 25, 50, 75, and 100% represent the second pulse's amplitude in relation to the first pulse's amplitude. 0% represents a unipolar pulse, where no second pulse was applied. The electrodes were two parallel stainless-steel cylinders, 1.5 mm in diameter and 3 mm apart. Supported by NIH 1R21EY034258",
- "tags": [
- {
- "id": 408,
- "tag": "DANDI:000489"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 409,
- "tag": "Bos taurus - Cattle"
- }
- ],
- "timestamp_created": "2023-12-18 16:51:33.153996+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000489/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "221": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "0.230602.1307",
- "id": 221,
- "name": "BrainFlowZZZ",
- "repository_type": "dandi",
- "summary": "Dataset from the 2023 manuscript titled **_Sizes and Shapes of Perivascular Spaces Surrounding Murine Pial Arteries_** by Raicevic et al. DOI: 10.21203/rs.3.rs-2587250/v1. \n\n## Overview\nThe **14 datasets** from **9 subjects** include the original 3D two photon microscopy data from three channels which show tracer in the vessel, PVSs, and microspheres. Additionally, each dataset also includes the final binary segmentation of the PVS and vessel used to generate the model and statistics in the manuscript. Additional details regarding the subjects, tracer injection, image acquisition, and segmentation can be found in the manuscript at https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9949243/.\n\n## Content\nFor easier navigation, below is a mapping between the NWB file names and the datasets referenced in the manuscript.\n1. sub-21-07-19-b-act (Mouse 6, dataset K)\n2. sub-21-09-01-b-act (Mouse 8, dataset M)\n3. sub-21-09-20-b-act (Mouse 9, dataset N)\n4. sub-21-10-08-b-act (Mouse 7, dataset L)\n5. sub-BPN-M4 (Mouse 3, dataset E and F)\n6. sub-BPN-M6 (Mouse 4, dataset G and H)\n7. sub-BPN-M7 (Mouse 5, dataset I and J)\n8. sub-BPN-OLD-M2 (Mouse 1, dataset A and B)\n9. sub-BPN-OLD-M3 (Mouse 2, dataset C and D)\n\n## Data Reading Instructions\nThe .nwb files can be viewed using PyNWB or MatNWB. To install and set up, please visit . Below, we show how to open and view an .nwb file using MatNWB. \n### Loading the image data\n```matlab\nnwb = nwbRead(PATH_TO_NWB_FILE);\n\n% first check what color channels are present\n>> nwb.acquisition\nans = \n 3\u00d71 Set array with properties:\n TwoPhotonSeriesChanA: [types.core.TwoPhotonSeries]\n TwoPhotonSeriesChanB: [types.core.TwoPhotonSeries]\n TwoPhotonSeriesChanC: [types.core.TwoPhotonSeries]\n```\nThe above code load the .nwb file and the output tells us that there are three channels present in the nwb file, which are ChanA, ChanB, and ChanC. Then, to load the actual data from a channel,\n```matlab\n% load the image data from ChanA\n>> chanAdata = nwb.acquisition.get('TwoPhotonSeriesChanA').data.load();\n\n% check its shape\n>> size(chanAdata)\nans =\n 1 512 512 181\n```\n### Loading the segmentation masks\nFor an overview of the mask for ChanA, for example,\n```matlab\n>> nwb.processing.get('ophys').nwbdatainterface.get('ImageSegmentation').planesegmentation.get('PlaneSegmentationChanA').image_mask.data\nans = \n DataStub with properties:\n filename: '.\\sub-BPN-M4_ses-20210524-m1_obj-1c8nyxo_ophys.nwb'\n path: '/processing/ophys/ImageSegmentation/PlaneSegmentationChanA/image_mask'\n dims: [512 512 181]\n ndims: 3\n dataType: 'logical'\n```\nTo load the actual mask data into array (may take several seconds to load),\n```matlab\n% load mask from ChanA\n>> mask = nwb.processing.get('ophys').nwbdatainterface.get('ImageSegmentation').planesegmentation.get('PlaneSegmentationChanA').image_mask.data.load();\n\n% check its shape\n>> size(mask)\nans =\n 512 512 181\n```",
- "tags": [
- {
- "id": 410,
- "tag": "DANDI:000491"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 194,
- "tag": "Mus musculus - House mouse"
- }
- ],
- "timestamp_created": "2023-12-18 16:51:34.468218+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000491/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "222": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "draft",
- "id": 222,
- "name": "Test 2",
- "repository_type": "dandi",
- "summary": "try to upload EIS",
- "tags": [
- {
- "id": 411,
- "tag": "DANDI:000529"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 205,
- "tag": "Rattus norvegicus - Norway rat"
- }
- ],
- "timestamp_created": "2023-12-18 16:51:35.586711+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000529/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "223": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "0.230524.0416",
- "id": 223,
- "name": "Allen Institute Openscope - Effects of Periodic Visual Stimulation on Neural Activity in Mouse Visual Cortex",
- "repository_type": "dandi",
- "summary": "This study investigates the effects of periodic sensory stimulation (PSS) on the activity of neurons of different types in the mouse visual cortex. The PSS modality used is the flickering light visual stimulation. The dataset provides calcium imaging data from VIP (vasoactive intestinal peptide), SST (somatostatin), and PV (parvalbumin) expressing inhibitory neuron, as well as excitatory neurons in V1, in mice exposed to different visual stimulation conditions.\n \nThe visual stimulus is provided by an LED strip that is programmed for 4 conditions: 40 Hz flicker (gamma frequency), 8 Hz flicker (theta frequency), random frequency (light delivered with a random interval determined by a Poisson process with an average frequency of 40 Hz), and constant light on. Those conditions are reported in NWB file trial table. The LED strip was positioned in front of the mouse right eye in place of the visual stimulation screen used in (De Vries, Lecoq, Buice et al, Nature Neuroscience 2020). Light illumination started approximately 485 seconds into the experiment. The exact timing can be found in the stimulus table. Each mouse was recorded multiple times with individual cells matched. Each recording session only used one of the above stimulus conditions.\n \nThe data includes images from layers 2/3 and 5 (layer 4 instead of 5 for VIP) of the left visual cortex, capturing the contributions of superficial and deep cortical neurons to the network dynamics under visual PSS. The dataset was collected from 5 mice for SST, 6 mice for VIP, 2 mice for PV, and 2 mice for excitatory neurons. Mice were awake but not trained to perform any tasks. They were passively viewing the LED strip. All animal procedures were approved by the Institutional Animal Care and Use Committee (IACUC) at the Allen Institute for Brain Science in compliance with NIH guidelines.",
- "tags": [
- {
- "id": 412,
- "tag": "two-photon"
- },
- {
- "id": 413,
- "tag": "cortical recording"
- },
- {
- "id": 414,
- "tag": "gamma"
- },
- {
- "id": 415,
- "tag": "neuroprotection"
- },
- {
- "id": 14,
- "tag": "oscillations"
- },
- {
- "id": 54,
- "tag": "visual stimuli"
- },
- {
- "id": 416,
- "tag": "DANDI:000535"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 194,
- "tag": "Mus musculus - House mouse"
- }
- ],
- "timestamp_created": "2023-12-18 16:51:36.817084+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000535/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "224": {
- "auto_sync": true,
- "content_types": "experimental",
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- "default_context": "draft",
- "id": 224,
- "name": "Scaling of GEVI Fluorescence with 1P and 2P Illumination",
- "repository_type": "dandi",
- "summary": "This dataset contains videos demonstrating the fluorescence of Human Embryonic Kidney (HEK) cells transfected with common genetically encoded voltage indicators (GEVIs). ",
- "tags": [
- {
- "id": 417,
- "tag": "DANDI:000537"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 262,
- "tag": "Homo sapiens - Human"
- }
- ],
- "timestamp_created": "2023-12-18 16:51:37.997939+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000537/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "225": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "draft",
- "id": 225,
- "name": "Comparing the 1P and 2P Voltage Contrast of JEDI2P and Voltron2_JF525",
- "repository_type": "dandi",
- "summary": "This dataset demonstrates the voltage contrast of JEDI2P and Voltron2_JF525 under 1P and 2P illumination.",
- "tags": [
- {
- "id": 418,
- "tag": "DANDI:000538"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 262,
- "tag": "Homo sapiens - Human"
- }
- ],
- "timestamp_created": "2023-12-18 16:51:39.313726+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000538/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "226": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "0.230515.0530",
- "id": 226,
- "name": "Dataset for: A change in behavioral state switches the pattern of motor output that underlies rhythmic head and orofacial movements",
- "repository_type": "dandi",
- "summary": "Recorded multi-modal data (videography, respiration, electromyogram, wearable sensor signals, and human annotation) from rats performing naturalistic foraging and rearing behaviors in an open arena. Dataset for S.-M. Liao and D. Kleinfeld, Current Biology (2023). A change in behavioral state switches the pattern of motor output that underlies rhythmic head and orofacial movements. Dataset uploaded by the Kleinfeld Laboratory at University of California San Diego. Code can be found on https://rhythm-n-rodents.github.io/software/.",
- "tags": [
- {
- "id": 419,
- "tag": "breathing"
- },
- {
- "id": 420,
- "tag": "coupled oscillators"
- },
- {
- "id": 421,
- "tag": "electromyogram"
- },
- {
- "id": 422,
- "tag": "foraging"
- },
- {
- "id": 423,
- "tag": "muscles"
- },
- {
- "id": 424,
- "tag": "nose"
- },
- {
- "id": 425,
- "tag": "preBotzinger complex"
- },
- {
- "id": 426,
- "tag": "rearing"
- },
- {
- "id": 427,
- "tag": "vibrissae"
- },
- {
- "id": 428,
- "tag": "whiskers"
- },
- {
- "id": 429,
- "tag": "neck"
- },
- {
- "id": 430,
- "tag": "DANDI:000540"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 205,
- "tag": "Rattus norvegicus - Norway rat"
- }
- ],
- "timestamp_created": "2023-12-18 16:51:40.541660+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000540/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "227": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
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- "default_context": "0.241009.1457",
- "id": 227,
- "name": "NeuroPAL Microfluidic Chip Images and GCaMP activity",
- "repository_type": "dandi",
- "summary": "NeuroPAL Microfluidic chip images and GCaMP activity from \"NeuroPAL: A Multicolor Atlas for Whole-Brain Neuronal Identification in C. elegans\" and \"Extracting neural signals from semi-immobilized animals with deformable non-negative matrix factorization.\" ",
- "tags": [
- {
- "id": 431,
- "tag": "DANDI:000541"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 394,
- "tag": "Caenorhabditis elegans"
- }
- ],
- "timestamp_created": "2023-12-18 16:51:41.745425+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000541/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "228": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "0.230514.1148",
- "id": 228,
- "name": "Test Dataset",
- "repository_type": "dandi",
- "summary": "Test dataset for DataJoint uploads to DANDI",
- "tags": [
- {
- "id": 432,
- "tag": "DANDI:000544"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 194,
- "tag": "Mus musculus - House mouse"
- }
- ],
- "timestamp_created": "2023-12-18 16:51:42.878663+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000544/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "229": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "draft",
- "id": 229,
- "name": "Test set",
- "repository_type": "dandi",
- "summary": "Another test upload for DataJoint",
- "tags": [
- {
- "id": 433,
- "tag": "DANDI:000545"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 194,
- "tag": "Mus musculus - House mouse"
- }
- ],
- "timestamp_created": "2023-12-18 16:51:44.099015+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000545/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "230": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "draft",
- "id": 230,
- "name": "vStr_phase_stim",
- "repository_type": "dandi",
- "summary": "Extracellular ephys recording in the ventral Striatum",
- "tags": [
- {
- "id": 434,
- "tag": "DANDI:000546"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 194,
- "tag": "Mus musculus - House mouse"
- }
- ],
- "timestamp_created": "2023-12-18 16:51:45.235148+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000546/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "231": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "0.230822.1616",
- "id": 231,
- "name": "Perivascular Pumping of Cerebrospinal Fluid in the Brain with a Valve Mechanism",
- "repository_type": "dandi",
- "summary": "This dataset contains the 2-photon recordings of the penetrating arteries of mice, included in the project \"Perivascular Pumping of Cerebrospinal Fluid in the Brain with a Valve Mechanism\".",
- "tags": [
- {
- "id": 435,
- "tag": "DANDI:000547"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 194,
- "tag": "Mus musculus - House mouse"
- }
- ],
- "timestamp_created": "2023-12-18 16:51:46.594261+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000547/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "232": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "0.230519.1825",
- "id": 232,
- "name": "Effect of the number of pulses on electroporation by unipolar and 50 % bipolar pulses",
- "repository_type": "dandi",
- "summary": "Trains of 5, 10, or 15 pulses all at 1 Hz. Cells were electroporated by a train of 5, 10, or 15 unipolar 600 ns pulses (0 percent) or bipolar 600 + 600 ns pulses (50 percent) at 1 Hz. 50% represents the second pulse's amplitude in relation to the first pulse's amplitude. 0% represents a unipolar pulse, where no second pulse was applied. The electrodes were two parallel stainless-steel cylinders, 1.5 mm in diameter and 3 mm apart. Supported by NIH 1R21EY034258",
- "tags": [
- {
- "id": 436,
- "tag": "DANDI:000548"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 409,
- "tag": "Bos taurus - Cattle"
- }
- ],
- "timestamp_created": "2023-12-18 16:51:47.738085+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000548/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "233": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "0.230519.2043",
- "id": 233,
- "name": "Effect of the pulse duration on electroporation by unipolar and 50% bipolar pulses",
- "repository_type": "dandi",
- "summary": "Trains of 5 different duration pulses, all exposures were at 1 Hz. Cells were electroporated by a train of 5 unipolar 300ns, 1200ns, 50us, 100us, 500us or bipolar 300+300ns, 1200+1200ns, 50+50us, 100+100us, 500+500us pulses (second pulse's amplitude was 50% in relation to the first pulse's amplitude). The electrodes were two parallel stainless-steel cylinders, 1.5 mm in diameter and 3 mm apart. Supported by NIH 1R21EY034258",
- "tags": [
- {
- "id": 437,
- "tag": "DANDI:000549"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 409,
- "tag": "Bos taurus - Cattle"
- }
- ],
- "timestamp_created": "2023-12-18 16:51:48.948689+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000549/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "234": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "0.230520.1609",
- "id": 234,
- "name": "Pulse repetition rate",
- "repository_type": "dandi",
- "summary": "Effect of pulse repetition rate on electroporation by 5 600ns unipolar or 600+600ns bipolar pulses (second phase's amplitude was 50% in relation to the first pulse's amplitude), at 833kHz, 500kHz, 100kHz, 10kHz. The electrodes were two parallel stainless-steel cylinders, 1.5 mm in diameter and 3 mm apart. Supported by NIH 1R21EY034258\n",
- "tags": [
- {
- "id": 438,
- "tag": "DANDI:000550"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 409,
- "tag": "Bos taurus - Cattle"
- }
- ],
- "timestamp_created": "2023-12-18 16:51:50.165243+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000550/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "235": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "0.230630.2304",
- "id": 235,
- "name": "Preconfigured dynamics in the hippocampus are guided by embryonic birthdate and rate of neurogenesis",
- "repository_type": "dandi",
- "summary": "The incorporation of novel information into the hippocampal network is likely be constrained by its innate architecture and internally generated activity patterns. However, the origin, organization, and consequences of such patterns remain poorly understood. Here, we show that hippocampal network dynamics are affected by sequential neurogenesis. We birthdated CA1 pyramidal neurons with in-utero electroporation over 4 embryonic days encompassing the peak of hippocampal neurogenesis, and compared their functional features in freely moving, adult mice. Neurons of the same birthdate displayed distinct connectivity, coactivity across brain states, and assembly dynamics. Same birthdate hippocampal neurons were topographically organized, in that anatomically clustered (<500\u00b5m) neurons exhibited overlapping spatial representations. Overall, the wiring and functional features of CA1 pyramidal neurons reflected a combination of birthdate and the rate of neurogenesis. These observations demonstrate that sequential neurogenesis in embryonic development shapes the preconfigured forms of adult network dynamics.",
- "tags": [
- {
- "id": 439,
- "tag": "Hippocampus"
- },
- {
- "id": 440,
- "tag": "Neural circuits"
- },
- {
- "id": 441,
- "tag": "Development of the nervous system"
- },
- {
- "id": 442,
- "tag": "DANDI:000552"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 194,
- "tag": "Mus musculus - House mouse"
- }
- ],
- "timestamp_created": "2023-12-18 16:51:51.409405+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000552/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "236": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "0.230531.1237",
- "id": 236,
- "name": "Human brain mapping with multithousand-channel PtNRGrids resolves spatiotemporal dynamics",
- "repository_type": "dandi",
- "summary": "This dataset contains recordings from PtNRGrids, which are devices designed to record electrocorticography (ECoG) activities from the brain surface at high-spatial resolution. PtNRGrids used here were a square-shaped array with 1024 channels and a 150-\u00b5m pitch, which was implanted to record neural activity from the entire right primary somatosensory barrel cortex. The sensory response on the brain was evoked by delivering air puffs through a microcapillary tube to individually stimulate individual whiskers on the contralateral side. This dataset demonstrates the high-spatial resolution recording capability of PtNRGrids isolate functional cortical columns in sub-mm resolution from the surface of the brain.\n\n[Publication corresponding to this dataset] Tchoe, Youngbin, et al. \"Human brain mapping with multithousand-channel PtNRGrids resolves spatiotemporal dynamics.\" Science translational medicine 14.628 (2022): eabj1441.\n[Electrode mapping information & Basic analysis codes] Github: https://ytchoe.github.io/",
- "tags": [
- {
- "id": 443,
- "tag": "DANDI:000554"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 205,
- "tag": "Rattus norvegicus - Norway rat"
- }
- ],
- "timestamp_created": "2023-12-18 16:51:52.712008+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000554/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "237": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "0.240502.0456",
- "id": 237,
- "name": "Spontaneous behaviour is structured by reinforcement without explicit reward",
- "repository_type": "dandi",
- "summary": "Spontaneous animal behaviour is built from action modules that are concatenated by the brain into sequences. However, the neural mechanisms that guide the composition of naturalistic, self-motivated behaviour remain unknown. Here we show that dopamine systematically fluctuates in the dorsolateral striatum (DLS) as mice spontaneously express sub-second behavioural modules, despite the absence of task structure, sensory cues or exogenous reward. Photometric recordings and calibrated closed-loop optogenetic manipulations during open field behaviour demonstrate that DLS dopamine fluctuations increase sequence variation over seconds, reinforce the use of associated behavioural modules over minutes, and modulate the vigour with which modules are expressed, without directly influencing movement initiation or moment-to-moment kinematics. Although the reinforcing effects of optogenetic DLS dopamine manipulations vary across behavioural modules and individual mice, these differences are well predicted by observed variation in the relationships between endogenous dopamine and module use. Consistent with the possibility that DLS dopamine fluctuations act as a teaching signal, mice build sequences during exploration as if to maximize dopamine. Together, these findings suggest a model in which the same circuits and computations that govern action choices in structured tasks have a key role in sculpting the content of unconstrained, high-dimensional, spontaneous behavior.",
- "tags": [
- {
- "id": 444,
- "tag": "Basal Ganglia"
- },
- {
- "id": 440,
- "tag": "Neural circuits"
- },
- {
- "id": 445,
- "tag": "Reward"
- },
- {
- "id": 446,
- "tag": "DANDI:000559"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 262,
- "tag": "Homo sapiens - Human"
- }
- ],
- "timestamp_created": "2023-12-18 16:51:53.977911+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000559/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "238": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "0.241009.1504",
- "id": 238,
- "name": "C. elegans whole-brain neuroPAL and immobilized calcium imaging",
- "repository_type": "dandi",
- "summary": "All of the datasets here contain neuroPAL whole-brain structural images. A subset of these files also contain unstimulated calcium imaging data from the worm immobilized in a micro fluidic chip. Each dataset has ~30-50% of neuron centers labeled with cell IDs.",
- "tags": [
- {
- "id": 447,
- "tag": "DANDI:000565"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 394,
- "tag": "Caenorhabditis elegans"
- }
- ],
- "timestamp_created": "2023-12-18 16:51:55.659727+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000565/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "239": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "draft",
- "id": 239,
- "name": "ASAP4 data",
- "repository_type": "dandi",
- "summary": "Raw data for \"A positively tuned voltage indicator for extended electrical recordings in the brain\", Nature Methods 2023, https://doi.org/10.1038/s41592-023-01913-z",
- "tags": [
- {
- "id": 448,
- "tag": "DANDI:000566"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 274,
- "tag": "Drosophila melanogaster - Fruit fly"
- }
- ],
- "timestamp_created": "2023-12-18 16:51:56.807404+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000566/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "240": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "0.230705.1633",
- "id": 240,
- "name": "Probing subthreshold dynamics of hippocampal neurons by pulsed optogenetics",
- "repository_type": "dandi",
- "summary": "Understanding how excitatory (E) and inhibitory (I) inputs are integrated by neurons requires monitoring their subthreshold behavior. We probed the subthreshold dynamics using optogenetic depolarizing pulses in hippocampal neuronal assemblies in freely moving mice. Excitability decreased during sharp- wave ripples coupled with increased I. In contrast to this \u201cnegative gain,\u201d optogenetic probing showed increased within-field excitability in place cells by weakening I and unmasked stable place fields in initially non\u2013place cells. Neuronal assemblies active during sharp-wave ripples in the home cage predicted spatial overlap and sequences of place fields of both place cells and unmasked preexisting place fields of non\u2013place cells during track running. Thus, indirect probing of subthreshold dynamics in neuronal populations permits the disclosing of preexisting assemblies and modes of neuronal operations.",
- "tags": [
- {
- "id": 449,
- "tag": "DANDI:000568"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 194,
- "tag": "Mus musculus - House mouse"
- }
- ],
- "timestamp_created": "2023-12-18 16:51:57.916876+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000568/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "241": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "0.230706.1630",
- "id": 241,
- "name": "20230630_AIBS_Patchseq_nonhuman_primate",
- "repository_type": "dandi",
- "summary": "HMBA Lein PatchSeq upload (Q2 2023)",
- "tags": [
- {
- "id": 27,
- "tag": "Patch-seq"
- },
- {
- "id": 450,
- "tag": "non-human primate"
- },
- {
- "id": 451,
- "tag": "multimodal"
- },
- {
- "id": 452,
- "tag": "DANDI:000569"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 453,
- "tag": "Macaca nemestrina - Pigtail macaque"
- }
- ],
- "timestamp_created": "2023-12-18 16:51:59.285199+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000569/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "242": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "0.230706.1630",
- "id": 242,
- "name": "20230630_AIBS_Patchseq_human",
- "repository_type": "dandi",
- "summary": "U01 Lein Patch-seq data upload (Q2 2023)",
- "tags": [
- {
- "id": 27,
- "tag": "Patch-seq"
- },
- {
- "id": 7,
- "tag": "human"
- },
- {
- "id": 451,
- "tag": "multimodal"
- },
- {
- "id": 454,
- "tag": "DANDI:000570"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 262,
- "tag": "Homo sapiens - Human"
- }
- ],
- "timestamp_created": "2023-12-18 16:52:00.540907+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000570/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "243": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "0.250616.1143",
- "id": 243,
- "name": "Intracranial recordings using BCI2000 and the CorTec BrainInterchange",
- "repository_type": "dandi",
- "summary": "An Ecosystem of Technology and Protocols for Adaptive Neuromodulation Research in Humans\n\nThis study aims to develop an ecosystem for the purpose of neurmodulation using the Cortec BCI device and BCI2000 software.\n\nContact: For questions regarding this dataset, please contact mivalt.filip@mayo.edu or Miller.Kai@mayo.edu",
- "tags": [
- {
- "id": 455,
- "tag": "DANDI:000571"
- },
- {
- "id": 181,
- "tag": "DANDI"
- }
- ],
- "timestamp_created": "2023-12-18 16:52:01.687813+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000571/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "244": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "0.230826.0140",
- "id": 244,
- "name": "Activity map of a cortico-cerebellar loop underlying motor planning",
- "repository_type": "dandi",
- "summary": "Data from \"Activity map of a cortico-cerebellar loop underlying motor planning\" Jia Zhu, Hana Hasanbegovic, Liu D. Liu, Zhenyu Gao, Nuo Li. Nat Neurosci 2023\n\nAn activity map of the cerebellar cortex during a delayed response task in which mice used short-term memory to plan directional licking.\n\nSupported by Robert and Janice McNair Foundation, Whitehall Foundation, Alfred P. Sloan Foundation, Searle Scholars Program, Pew Scholars Program, NIH NS104781, NS112312, NS113110, McKnight Foundation, Simons Collaboration on the Global Brain.\n",
- "tags": [
- {
- "id": 456,
- "tag": "DANDI:000572"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 194,
- "tag": "Mus musculus - House mouse"
- }
- ],
- "timestamp_created": "2023-12-18 16:52:02.996937+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000572/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "245": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "0.250610.0938",
- "id": 245,
- "name": "Dataset of human medial temporal lobe neurons, scalp and intracranial EEG during a verbal working memory task",
- "repository_type": "dandi",
- "summary": "We present an electrophysiological dataset recorded from nine subjects during a verbal working memory task. Subjects were epilepsy patients undergoing intracranial monitoring for localization of epileptic seizures. Subjects performed a modified Sternberg task in which the encoding of memory items, maintenance, and recall were temporally separated. The dataset includes simultaneously recorded scalp EEG with the 10-20 system, intracranial EEG (iEEG) recorded with depth electrodes, waveforms and spike times of 1526 units recorded in the medial temporal lobe, and the MNI coordinates and anatomical labels of all intracranial electrodes. Subject characteristics and information on sessions (set size, match/mismatch, correct/incorrect, response, response time for each trial) are also provided. This dataset enables the investigation of working memory by providing simultaneous scalp EEG and iEEG recordings, which can be used for connectivity analysis, alongside hard to obtain unit recordings from humans.",
- "tags": [
- {
- "id": 457,
- "tag": "Electrophysiology"
- },
- {
- "id": 77,
- "tag": "Human"
- },
- {
- "id": 458,
- "tag": "Awake"
- },
- {
- "id": 459,
- "tag": "Local field potential"
- },
- {
- "id": 460,
- "tag": "Neuronal action potential"
- },
- {
- "id": 461,
- "tag": "Spikes"
- },
- {
- "id": 462,
- "tag": "Medial temporal lobe"
- },
- {
- "id": 439,
- "tag": "Hippocampus"
- },
- {
- "id": 463,
- "tag": "Entorhinal cortex"
- },
- {
- "id": 464,
- "tag": "Amygdala"
- },
- {
- "id": 465,
- "tag": "Scalp EEG"
- },
- {
- "id": 466,
- "tag": "Intracranial EEG"
- },
- {
- "id": 467,
- "tag": "Cognitive task"
- },
- {
- "id": 468,
- "tag": "Verbal working memory"
- },
- {
- "id": 469,
- "tag": "Epilepsy"
- },
- {
- "id": 470,
- "tag": "DANDI:000574"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 262,
- "tag": "Homo sapiens - Human"
- }
- ],
- "timestamp_created": "2023-12-18 16:52:04.240390+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000574/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "246": {
- "auto_sync": true,
- "content_types": "experimental",
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- ],
- "default_context": "0.231010.1811",
- "id": 246,
- "name": "Dataset of human medial temporal lobe neurons during a visual working memory task",
- "repository_type": "dandi",
- "summary": "We present an electrophysiological dataset recorded from thirteen subjects during a visual working memory task. Subjects were epilepsy patients undergoing intracranial monitoring for localization of epileptic seizures. Here, we recorded single neuron firing in 13 epilepsy patients (7 male) while they performed a visual working memory task. The task is a change detection task designed to examine the visual working memory of subjects. In each trial, arrays of colored squares were presented and had to be memorized. The number of squares determined the set size: 1, 2, 4 or 6. There was a total 192 trials per session. Each trial started with a warning signal (0.4 s) that was a red fixation dot. The fixation dot was then changed to black (0.4 \u2013 0.5 s, jittered). A memory array (encoding period, 0.8 s) was followed by a delay (retention interval, 0.9 s). After the delay, a test array was shown (2 s) followed by a jittered inter-trial interval of 1.3 to 2.3 s. The participants indicated by button press (\u201cSame\u201d or \u201cDifferent\u201d, forced choice) whether the test array differed from the memory array. If the arrays differed, only one square changed in colour, but all squares remained on the same location. The fixation dot was visible on the screen during the whole trial period. Eight different colours were used for the memory and test array (yellow, red, green, blue, magenta, cyan, grey, black). Before starting the sessions, participants conducted trial runs in a practice session to learn the task. In this session we verified if participants were colour-blind and could discriminate all colours. Practice sessions were repeated until the participant understood the task and was able to follow the pace of the trials.",
- "tags": [
- {
- "id": 471,
- "tag": "DANDI:000575"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 262,
- "tag": "Homo sapiens - Human"
- }
- ],
- "timestamp_created": "2023-12-18 16:52:05.421545+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000575/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "247": {
- "auto_sync": true,
- "content_types": "experimental",
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- "experimental"
- ],
- "default_context": "0.231010.1811",
- "id": 247,
- "name": "Dataset of neurons and intracranial EEG from human amygdala during aversive dynamic visual stimulation",
- "repository_type": "dandi",
- "summary": "We present an electrophysiological dataset collected from the amygdalae of nine subjects attending a visual dynamic stimulation of emotional aversive content. The subjects were patients affected by epilepsy who underwent preoperative invasive monitoring in the mesial temporal lobe. Subjects were presented with dynamic visual sequences of fearful faces (aversive condition), interleaved with sequences of neutral landscapes (neutral condition).\n\nWe provide simultaneous recordings of intracranial EEG (iEEG) and neuronal spike times and waveforms, and metadata related to the task, subjects, sessions and electrodes in the NIX standard. We technically validated this dataset and provide here the spike sorting quality metrics and the spectra of iEEG signals.\nThis dataset allows the investigation of amygdalar response to dynamic aversive stimuli at multiple spatial scales, from the macroscopic EEG to the neuronal firing in the human brain.",
- "tags": [
- {
- "id": 472,
- "tag": "DANDI:000576"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 262,
- "tag": "Homo sapiens - Human"
- }
- ],
- "timestamp_created": "2023-12-18 16:52:06.523011+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000576/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "248": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "0.230728.1727",
- "id": 248,
- "name": "Two-photon calcium imaging of mouse posterior cortical areas during dynamic navigation decisions (Tseng et al., 2022, Neuron)",
- "repository_type": "dandi",
- "summary": "This is the dataset for Tseng et al, \"Shared and specialized coding across posterior cortical areas for dynamic navigation decisions\" in Neuron (2022). The dataset contains calcium activity of >200,000 neurons recorded from 6 different cortical areas in mouse posterior cortex L2/3 and L5 using two-photon imaging, including V1 and secondary visual areas, retrosplenial cortex (RSC) and posterior parietal cortex (PPC), while the mice were performing a flexible decision-making task based on rule-switching during virtual navigation. There are total 300 behavior + imaging sessions collected from 8 mice. The neurons in each experiment have been registered into the Allen Institute Mouse Common Coordinate Framework (CCF) based on widefield retinotopy. In addition, these neurons contain fluorescent labels of retroAAV injected in one of the two sets of projection targets: an anterior part of anterior cingulate cortex/secondary motor cortex (ACC/M2) and striatum, or a posterior part of ACC/M2 and orbitofrontal cortex (OFC). \n\nPlease see the related paper for more details: https://doi.org/10.1016/j.neuron.2022.05.012\n\nAdditional resources:\n\n- Jupyter notebook for a tutorial to read and extract information from these NWB files: https://github.com/sytseng/Notebook_for_Dandiset_000579\n\n- NWB extension code for custom lab meta data (required for reading NWB files): https://github.com/sytseng/ndx-harvey-swac \n\n- Code and tutorials for fitting GLM to neural activity in Tensorflow 2: https://github.com/sytseng/GLM_Tensorflow_2",
- "tags": [
- {
- "id": 29,
- "tag": "mouse"
- },
- {
- "id": 8,
- "tag": "cortex"
- },
- {
- "id": 84,
- "tag": "decision-making"
- },
- {
- "id": 473,
- "tag": "navigation"
- },
- {
- "id": 474,
- "tag": "virtual reality"
- },
- {
- "id": 475,
- "tag": "two-photon imaging"
- },
- {
- "id": 476,
- "tag": "posterior cortex"
- },
- {
- "id": 321,
- "tag": "posterior parietal cortex"
- },
- {
- "id": 477,
- "tag": "retrosplenial cortex"
- },
- {
- "id": 33,
- "tag": "visual cortex"
- },
- {
- "id": 478,
- "tag": "rule-switching"
- },
- {
- "id": 479,
- "tag": "flexible decisions"
- },
- {
- "id": 480,
- "tag": "retrograde labeling"
- },
- {
- "id": 481,
- "tag": "DANDI:000579"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 194,
- "tag": "Mus musculus - House mouse"
- }
- ],
- "timestamp_created": "2023-12-18 16:52:07.777212+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000579/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "249": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "draft",
- "id": 249,
- "name": "Conjunctive Representation of Position, Direction, and Velocity in Entorhinal Cortex",
- "repository_type": "dandi",
- "summary": "The dataset includes spike times for recorded grid cells from the medial entorhinal cortex (MEC) in rats that explored two-dimensional environments. The behavioral data includes position from the tracking LEDs. \n\nThis sample was published in Sargolini et al. (Science, 2006).\n\nGrid cells in the medial entorhinal cortex (MEC) are part of an environment-independent spatial coordinate system. To determine how information about location, direction, and distance is integrated in the grid-cell network, we recorded from each principal cell layer of MEC in rats that explored two-dimensional environments. Whereas layer II was predominated by grid cells, grid cells colocalized with head-direction cells and conjunctive grid x head-direction cells in the deeper layers. All cell types were modulated by running speed. The conjunction of positional, directional, and translational information in a single MEC cell type may enable grid coordinates to be updated during self-motion-based navigation.\n",
- "tags": [
- {
- "id": 482,
- "tag": "DANDI:000582"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 205,
- "tag": "Rattus norvegicus - Norway rat"
- }
- ],
- "timestamp_created": "2023-12-18 16:52:09.100049+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000582/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "250": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "draft",
- "id": 250,
- "name": "A Novel Neuropathic Pain Treatment: Achieving Neuronal Inhibition with a Splti Ring Resonator",
- "repository_type": "dandi",
- "summary": "Thesis defense data set consisting of extracellular action potentials and postsynaptic potentials captured in Procambarus clarkii.",
- "tags": [
- {
- "id": 483,
- "tag": "DANDI:000615"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 484,
- "tag": "Procambarus clarkii - Red swamp crayfish"
- }
- ],
- "timestamp_created": "2023-12-18 16:52:10.209567+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000615/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "251": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "draft",
- "id": 251,
- "name": "SpikeForest ground truth datasets",
- "repository_type": "dandi",
- "summary": "The SpikeForest project contains a collection of electrophysiological recordings together with ground truth spiking information for the purpose of benchmarking the performance of spike sorting algorithms. In this dandiset we provide a subset of these recordings together with ground truth.\n\nThis dataset was prepared using the following script: https://github.com/flatironinstitute/spikeforest/blob/main/devel/dandiset/prepare_dandiset.py\n\nFor more information, see https://elifesciences.org/articles/55167",
- "tags": [
- {
- "id": 485,
- "tag": "DANDI:000618"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 194,
- "tag": "Mus musculus - House mouse"
- }
- ],
- "timestamp_created": "2023-12-18 16:52:11.349193+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000618/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "252": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "0.240227.2023",
- "id": 252,
- "name": "Data for: Multimodal single-neuron, intracranial EEG, and fMRI brain responses during movie watching in human patients",
- "repository_type": "dandi",
- "summary": "We present a multimodal dataset of intracranial recordings, fMRI, and eye tracking in 20 participants during movie watching. Recordings consist of single neurons, local field potential, and intracranial EEG activity acquired from depth electrodes targeting the amygdala, hippocampus, and medial frontal cortex implanted for monitoring of epileptic seizures. Participants watched an 8-min long excerpt from the video \"Bang! You're Dead\" and performed a recognition memory test for movie content. 3\u2009T fMRI activity was recorded prior to surgery in 11 of these participants while performing the same task. This NWB- and BIDS-formatted dataset includes spike times, field potential activity, behavior, eye tracking, electrode locations, demographics, and functional and structural MRI scans. For technical validation, we provide signal quality metrics, assess eye tracking quality, behavior, the tuning of cells and high-frequency broadband power field potentials to familiarity and event boundaries, and show brain-wide inter-subject correlations for fMRI. This dataset will facilitate the investigation of brain activity during movie watching, recognition memory, and the neural basis of the fMRI-BOLD signal.\n\nThis dataset accompanies the following data descriptor: Keles, U., Dubois, J., Le, K.J.M., Tyszka, J.M., Kahn, D.A., Reed, C.M., Chung, J.M., Mamelak, A.N., Adolphs, R. and Rutishauser, U. Multimodal single-neuron, intracranial EEG, and fMRI brain responses during movie watching in human patients. Sci Data 11, 214 (2024). [Link to paper](https://doi.org/10.1038/s41597-024-03029-1)\n\nSample code to access and analyze this dataset has been provided: https://github.com/rutishauserlab/bmovie-release-NWB-BIDS",
- "tags": [
- {
- "id": 486,
- "tag": "DANDI:000623"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 262,
- "tag": "Homo sapiens - Human"
- },
- {
- "id": 4739,
- "tag": "iEEG"
- },
- {
- "id": 4740,
- "tag": "movie watching"
- },
- {
- "id": 4741,
- "tag": "recognition memory"
- },
- {
- "id": 4742,
- "tag": "single-neuron"
- }
- ],
- "timestamp_created": "2023-12-18 16:52:12.470428+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000623/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "253": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "draft",
- "id": 253,
- "name": "A brainstem circuit for the expression of defensive facial reactions in rat",
- "repository_type": "dandi",
- "summary": "Chemoreceptors in the nasal epithelium can trigger an apneic reaction and a grimace in response to airborne irritants. Callado Perez et al. find that the underlying circuit does not involve olfaction. Rather, activation of neurons in the muralis subnucleus of the spinal trigeminal complex will inhibit the Pre-B\u00f6tzinger inhalation oscillator.",
- "tags": [
- {
- "id": 487,
- "tag": "DANDI:000624"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 205,
- "tag": "Rattus norvegicus - Norway rat"
- }
- ],
- "timestamp_created": "2023-12-18 16:52:13.717460+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000624/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "254": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "0.231114.0019",
- "id": 254,
- "name": "Molecularly Identified CA1 Interneuron Dynamics",
- "repository_type": "dandi",
- "summary": "This dataset was collected to examine the dynamics of mouse interneurons whose subtypes were molecularly identified. 231 ROIs were observed over 3 separate imaging sessions. For each session you will find the following:\n- Raw images (individual cropped ROIs)\n- DfOverF traces\n- Fluorescence traces\n- Subtype of each ROI (some are undetermined)\n- Timing of water rewards\n- Time-stamped position of subject\n\n\nData was collected by Tristan Geiller at the Losonczy Lab using two photon calcium imaging and head-fixed mice running on a voluntary treadmill.",
- "tags": [
- {
- "id": 222,
- "tag": "2-photon calcium imaging"
- },
- {
- "id": 34,
- "tag": "interneuron"
- },
- {
- "id": 92,
- "tag": "hippocampus"
- },
- {
- "id": 488,
- "tag": "ca1"
- },
- {
- "id": 29,
- "tag": "mouse"
- },
- {
- "id": 368,
- "tag": "head-fixed"
- },
- {
- "id": 489,
- "tag": "treadmill"
- },
- {
- "id": 490,
- "tag": "Losonczy Lab"
- },
- {
- "id": 491,
- "tag": "Columbia University"
- },
- {
- "id": 492,
- "tag": "DANDI:000625"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 194,
- "tag": "Mus musculus - House mouse"
- }
- ],
- "timestamp_created": "2023-12-18 16:52:15.057207+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000625/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "255": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "0.240501.1912",
- "id": 255,
- "name": "Extracellular recording along macaque ventral visual pathway during natural image free viewing",
- "repository_type": "dandi",
- "summary": "Recordings spanning six areas in the macaque ventral visual pathway (V1, V2 ,V4, PIT, CIT, AIT; primarily in CIT and AIT) including 679 experimental sessions, 883 hours, 13 monkeys, 4.6 million fixations, and thousands of natural images. For more information, see the journal article: https://www.nature.com/articles/s41593-024-01631-5.\n\nFor example code using these files, see the GitHub repository linked below under Related resources, containing code to reprocude the paper analyses. Please note that the NWB files hosted here are organized somewhat differently from the code examples, so please adapt the code accordingly.\n\nTo interactively explore the NWB files, a useful tool is HDFView (https://www.hdfgroup.org/downloads/hdfview/).",
- "tags": [
- {
- "id": 78,
- "tag": "Macaque"
- },
- {
- "id": 493,
- "tag": "Ventral stream"
- },
- {
- "id": 494,
- "tag": "Free viewing"
- },
- {
- "id": 495,
- "tag": "Natural images"
- },
- {
- "id": 496,
- "tag": "Extracellular electrophysiology"
- },
- {
- "id": 497,
- "tag": "DANDI:000628"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 210,
- "tag": "Macaca mulatta - Rhesus monkey"
- }
- ],
- "timestamp_created": "2023-12-18 16:52:16.281150+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000628/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
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- "last_name": "Admin",
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- "summary": "In the study, the impact of varying the electric field vector on the effectiveness of electroporation was examined, utilizing both paired-pulse trains, consisting of 5 pulses at 600 + 600 ns, and single-pulse trains with 5 pulses at 600 ns. These were applied to a BPAE cell monolayer at frequencies of either 1 Hz or 833 kHz. The focus was on assessing the alterations in electroporation efficiency, gauged through the changes in YoPro-1 emission when compared to the baseline established by a single-pulse train in the identical region of interest, which was set at 100%. The evaluation criteria included the angle at which the electric field vector direction alternated between two pulses within a pair. Introduction of pulses in pairs amplified the electroporation efficiency at smaller angles but resulted in an inhibition at larger angles, indicating a frequency-dependent relationship. The images captured during the experiments provided a comprehensive visualization of this effect, highlighting the nuanced impact of electric field vector modifications on electroporation efficiency. Supported by NIH 1R21EY034258",
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- "timestamp_created": "2023-12-18 16:52:20.257070+00:00",
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- "summary": "The efficiency of electroporation was evaluated in an experiment involving co-directional and cross-directional paired pulses using a triangular electrode array. BPAE cell monolayers were exposed to trains of four paired pulses, each consisting of 600 + 600 ns, at two distinct frequencies: 1 Hz and 770 kHz, with an amplitude of 10 kV/cm. In one scenario, the electric field direction remained consistent throughout each pair (co-directional). In another, the field direction was altered by 90\u00b0 (cross-directional). The electroporation efficiency was quantified through the cells\u2019 uptake of YoPro-1 dye, serving as a measure of the permeabilization of the cell membranes under varying electric field orientations and frequencies. Supported by NIH 1R21EY034258\n",
- "tags": [
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- "tag": "DANDI:000632"
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- "summary": "The difference in electroporation patterns produced by a train of single pulses and a train of paired pulses. Supported by NIH 1R21EY034258",
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- "timestamp_created": "2023-12-18 16:52:22.725123+00:00",
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- "summary": "Strobe photography, used at nanosecond resolution, captures the dynamic process of cell membrane charging and relaxation kinetics in cells treated with FluoVolt dye and exposed to electric pulses. This study uses a triangular electrode array where 300 ns pulses are applied alternately at a frequency of 1.67 MHz. The precise coordination of electric pulses and laser flashes, adjusted in 50 ns steps, allows for the detailed imaging of the cell's response. The electric field induces enhanced fluorescence at the cathode-facing side of the FluoVolt-loaded CHO cells and suppressed fluorescence at the anode-facing side. This research method provides a comprehensive and reliable examination of the cell membrane's behavior under electrical stimulation without causing damage, ensuring consistent observations to understand cellular responses to varying electrical stimuli. Supported by NIH 1R21EY034258",
- "tags": [
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- "tag": "DANDI:000634"
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- "tag": "DANDI"
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- "tag": "Cricetulus griseus - Cricetulus aureus"
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- "timestamp_created": "2023-12-18 16:52:23.976330+00:00",
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- "summary": "HMBA Lein PatchSeq upload (Q3 2023)",
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- "tag": "Macaca nemestrina"
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- "timestamp_created": "2023-12-18 16:52:25.293015+00:00",
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- "uri": "https://dandiarchive.org/dandiset/000635/draft",
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- "name": "Human interneuron patch-seq electrophysiology",
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- "summary": "Patch-seq electrophysiology data from human neocortical interneurons from acute and slice culture preparations, accompanying the manuscript \"Signature morpho-electric properties of diverse GABAergic interneurons in the human neocortex\" (https://www.biorxiv.org/content/10.1101/2022.11.08.515739).",
- "tags": [
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- "id": 7,
- "tag": "human"
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- "id": 451,
- "tag": "multimodal"
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- "id": 499,
- "tag": "patch-seq"
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- "id": 40,
- "tag": "neocortex"
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- "tag": "DANDI"
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- "id": 24,
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- "id": 77,
- "tag": "Human"
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- "timestamp_created": "2023-12-18 16:52:26.587360+00:00",
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- "uri": "https://dandiarchive.org/dandiset/000636/draft",
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- "name": "Neural Spike Time Response Data in Anesthetized Rats in the Primary Somatosensory Cortex with Phased Ultrasound Array Stimulation",
- "repository_type": "dandi",
- "summary": "In this study, we investigate the neuronal response to transcranial focused ultrasound (tFUS) stimulation on somatosensory cortex by using a 128-element array transducer. Intracranial recordings were performed using a 32-channel Neuronexus multi-electrode array from somatosensory cortex. Wistar rats were anesthetized using isoflurane at 2%. tFUS with different parameters was applied every 2.5s (\u00b110%). Data was recorded using a TDT system and MUA recordings were sorted using the Plexon Offline Sorter to determine the spike times.This dataset contains spike times of the sorted neural signals and event time for each tFUS trial. In these recordings, we test different pulse repetition frequencies (PRFs) (30Hz, 300Hz, 1500Hz, 3000Hz, and 4500Hz), ultrasound durations (UDs) (100\u00b5s, 200\u00b5s, and 400\u00b5s) of ultrasound stimulation to explore the neuronal response to tFUS. The pulse duration was kept at 67ms. Each recording has 500 trials. Detailed description about this dataset can be found in the following publication. Please cite the paper if you would use a portion of the dataset. Gao, H., Ramachandran, S., Yu, K., & He, B. (2025). Transcranial Focused Ultrasound Modulates Feedforward and Feedback Cortico-Thalamo-Cortical Pathways by Selectively Activating Excitatory Neurons. The Journal of Neuroscience, 45(23), e2218242025. https://doi.org/10.1523/JNEUROSCI.2218-24.2025",
- "tags": [
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- "tag": "DANDI:000637"
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- "timestamp_created": "2023-12-18 16:52:27.960721+00:00",
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- "uri": "https://dandiarchive.org/dandiset/000637/draft",
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- "id": 265,
- "name": "32-CH Local Field Potential Data During Probabilistic Reversal Learning Task",
- "repository_type": "dandi",
- "summary": "Male Long Evans Rats 7-12 months of age. 24 total animals. 256 sessions. 13 animals received a frontal traumatic brain injury (controlled cortical impact). 11 animals received Sham (no craniotomy no TBI) conditions. One week later, rats underwent a second surgery to implant 32 electrodes (Francoeur et al., Front. Psychiatry, 2021). Rats were trained to perform a self-paced probabilistic reversal learning task in a custom operant box with five noseports, stepper-motors to deliver water reward, houselight, and auditory tones. Local field potential (LFP) streams recorded simultaneously from 32 Brain Regions - recorded using a 32-Channel RHD headstage coupled to a RHD USB interface board (Intan Technologies). Open Ephys software at 1KHz band-pass filter set at 0.3-999Hz during acquisition. Lab-streaming-layer (LSL) was used to integrate physiology data with behavior. Physiology can be time-locked to trial onset (rat responds to start trial), response (rat choice between noseports), reward (time of reward delivery)",
- "tags": [
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- "id": 35,
- "tag": "electrophysiology"
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- "id": 509,
- "tag": "rodent behavior"
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- "id": 510,
- "tag": "reversal learning"
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- "tag": "traumatic brain injury"
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- "uri": "https://dandiarchive.org/dandiset/000640/draft",
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- "id": 266,
- "name": "Volumetric multiplex imaging of whole human and non-human primate brains",
- "repository_type": "dandi",
- "summary": "4mm SHIELD-processed human, macaque, and marmoset brain coronal sections, multi-round stained with DNA-labeled antibodies and Fluorescence In Situ Hybridization probes, and imaged with oblique fluorescence light sheet microscopes.",
- "tags": [
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- "id": 513,
- "tag": "DANDI:000674"
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- "id": 181,
- "tag": "DANDI"
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- "timestamp_created": "2023-12-18 16:52:30.510510+00:00",
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- "name": "Pupil and movement measurements during mouse auditory and visual discrimination",
- "repository_type": "dandi",
- "summary": "Pupil diameter, face motion energy, and locomotion speed measures recorded during sensory discrimination behavior of head-fixed mice. Subjects classify the frequency of an auditory tone cloud stimulus, or the angle of a drifting Gabor patch, at right or left lick ports. Data include 391 behavioral sessions from 13 subjects. For more information see the preprint at https://www.biorxiv.org/content/10.1101/2023.03.02.530651v2.",
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- "tag": "DANDI:000678"
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- "id": 181,
- "tag": "DANDI"
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- "id": 24,
- "tag": "NWB"
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- "id": 194,
- "tag": "Mus musculus - House mouse"
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- "timestamp_created": "2023-12-18 16:52:31.641819+00:00",
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- "uri": "https://dandiarchive.org/dandiset/000678/draft",
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- "name": "similarity-weighted interleaved learning",
- "repository_type": "dandi",
- "summary": "High-density silicon probe recordings from dorsal and intermediate CA1, primary visual cortex, and antero-lateral visual cortex in mice while they are exploring VR environments with different levels of similarity. The experiment was aimed at studying the content of replay across superficial and deep layers of visual cortex. ",
- "tags": [
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- "tag": "cortex layers"
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- "id": 92,
- "tag": "hippocampus"
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- "id": 57,
- "tag": "learning"
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- "tag": "memory"
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- "tag": "memory consolidation"
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- "default_context": "draft",
- "id": 269,
- "name": "An optical design enabling lightweight and large field-of-view head-mounted microscopes",
- "repository_type": "dandi",
- "summary": "Here we present a fluorescence microscope light path that enables imaging, during free behavior, of thousands of neurons in mice and hundreds of neurons in juvenile songbirds. The light path eliminates traditional illumination optics, allowing for head-mounted microscopes that have both a lower weight and a larger field of view (FOV) than previously possible. Using this light path, we designed two microscopes: one optimized for FOV (~4 mm FOV; 1.4 g), and the other optimized for weight (1.0 mm FOV; 1.0 g). \nThis dataset includes the calcium imaging data from our microscope optimized for weight. For this experiment, we stereotactically located a region of the mouse brain at coordinates associatied with primary visual and somatosensory regions, performed approximately 20 viral injections of GCaMP7f across a 4-mm-diameter region of cortex, and then implanted a 4-mm-diameter glass window in the skull. After letting each mouse recover, we installed our head-mounted microscope and allowed it to freely explore a circular maze while recording calcium activity for several minutes.",
- "tags": [
- {
- "id": 520,
- "tag": "DANDI:000691"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 194,
- "tag": "Mus musculus - House mouse"
- },
- {
- "id": 24,
- "tag": "NWB"
- }
- ],
- "timestamp_created": "2023-12-18 16:52:34.280726+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000691/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "270": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "0.240402.2118",
- "id": 270,
- "name": "Whole-brain spontaneous GCaMP activity with NeuroPAL cell ID information of semi-restricted worms",
- "repository_type": "dandi",
- "summary": "Spontaneous neuronal activities were extracted from GCaMP and tagRFP images, covering nearly all neurons in the nematode C. elegans brain. Cell segmentation and tracking were performed using 3DeeCellTracker (https://github.com/WenChentao/3DeeCellTracker). Neuronal identity information was derived from NeuroPAL signals with the NeuroPAL Auto-ID software (https://www.yeminilab.com/neuropal) and manual corrections. During the data acquisition, worms were semi-restricted in a microfluidic device (https://www.nature.com/articles/nature06292). Note: There are occasional transient failures in neuronal tracking. We recommend researchers to use a moving median filter (e.g., \u00b13) on the time series data to address this issue.",
- "tags": [
- {
- "id": 521,
- "tag": "DANDI:000692"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 394,
- "tag": "Caenorhabditis elegans"
- }
- ],
- "timestamp_created": "2023-12-18 16:52:35.430267+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000692/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "271": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "draft",
- "id": 271,
- "name": "The organization of context versus content coding in the hippocampus and neocortex",
- "repository_type": "dandi",
- "summary": "High-density silicon probe recordings from primary somatosensory cortex, posterior parietal cortex, and dorsal hippocampus (CA1) in head-fixed mice while running on a treadmill virtual reality task with different tactile cues.",
- "tags": [
- {
- "id": 522,
- "tag": "DANDI:000696"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 194,
- "tag": "Mus musculus - House mouse"
- }
- ],
- "timestamp_created": "2023-12-18 16:52:36.636699+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000696/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "272": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "draft",
- "id": 272,
- "name": "Laminar coding properties of visual object representations in the mouse neocortex across multiple contexts",
- "repository_type": "dandi",
- "summary": "High-density silicon probe recordings in the visual and parietal cortices during visual object recognition in the mouse.",
- "tags": [
- {
- "id": 523,
- "tag": "DANDI:000710"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 194,
- "tag": "Mus musculus - House mouse"
- }
- ],
- "timestamp_created": "2023-12-18 16:52:37.784135+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000710/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "273": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "0.231121.1730",
- "id": 273,
- "name": "Allen Institute - Visual Behavior - Optical Physiology",
- "repository_type": "dandi",
- "summary": "The Visual Behavior Ophys dataset was generated using in vivo 2-photon calcium imaging (also called optical physiology, or \u201cophys\u201d) to measure the activity of genetically identified neurons in the visual cortex of mice performing a go/no-go visual change detection task. Population of neurons were recorded over multiple days with varying sensory and behavioral contexts, including familiar and novel stimuli, and passive exposure sessions. This dataset can be used to evaluate the influence of experience, expectation, and task engagement on neural coding and dynamics in excitatory, Vip inhibitory, and Sst inhibitory cell populations. \n\nThe full ophys dataset includes neural and behavioral measurements from 107 well-trained mice during 703 in vivo 2-photon imaging sessions from 326 unique fields of view, resulting in a total of 50,476 cortical neurons recorded. The full behavioral training history of all imaged mice is also provided as part of the dataset, allowing investigation into task learning, behavioral strategy, and inter-animal variability. There are a total of 4,782 behavior sessions available for analysis.\n\nFull documentation of the Visual Behavior Ophys dataset and tutorials can be found here: https://allensdk.readthedocs.io/en/latest/visual_behavior_optical_physiology.html\n\nThe recommended route for interacting with these data is through the AllenSDK (https://github.com/AllenInstitute/AllenSDK/) which provides methods for downloading and processing data. Documentation of the AllenSDK can be found here: https://allensdk.readthedocs.io/en/latest/. \n\nThere are several metadata summary tables that are available as \"related resources\" associated with this DANDI-set. You can also use the AllenSDK to download these tables. See this notebook (https://allensdk.readthedocs.io/en/latest/_static/examples/nb/visual_behavior_ophys_data_access.html) for information on downloading the metadata and the associated NWB files.\n\nPublicly available pre-prints using this dataset include: \n\nStimulus novelty uncovers coding diversity in visual cortical circuits\nhttps://doi.org/10.1101/2023.02.14.528085 \n\nBehavioral strategy shapes activation of the Vip-Sst disinhibitory circuit in visual cortex\nhttps://doi.org/10.1101/2023.04.28.538575 \n\nFamiliarity modulated synapses model visual cortical circuit novelty responses\nhttps://doi.org/10.1101/2023.08.16.553635 ",
- "tags": [
- {
- "id": 29,
- "tag": "mouse"
- },
- {
- "id": 33,
- "tag": "visual cortex"
- },
- {
- "id": 524,
- "tag": "2-photon microscopy"
- },
- {
- "id": 525,
- "tag": "calcium imaging"
- },
- {
- "id": 526,
- "tag": "excitatory neurons"
- },
- {
- "id": 527,
- "tag": "inhibitory neurons"
- },
- {
- "id": 528,
- "tag": "novelty"
- },
- {
- "id": 529,
- "tag": "task engagement"
- },
- {
- "id": 530,
- "tag": "behavior"
- },
- {
- "id": 57,
- "tag": "learning"
- },
- {
- "id": 531,
- "tag": "change detection"
- },
- {
- "id": 532,
- "tag": "disinhibition"
- },
- {
- "id": 533,
- "tag": "DANDI:000711"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 194,
- "tag": "Mus musculus - House mouse"
- }
- ],
- "timestamp_created": "2023-12-18 16:52:39.228712+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000711/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "274": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "0.240702.1725",
- "id": 274,
- "name": "Allen Institute - Visual Behavior - Neuropixels",
- "repository_type": "dandi",
- "summary": "Data released here is for archival purposes. The recommended route for interacting with these data is through the AllenSDK (https://github.com/AllenInstitute/AllenSDK/) which provides methods for downloading and processing data. Documentation of the AllenSDK can be found here: https://allensdk.readthedocs.io/en/latest/. Full documentation of the Visual Behavior Neuropixels dataset and tutorials can be found here: https://allensdk.readthedocs.io/en/latest/visual_behavior_neuropixels.html ",
- "tags": [
- {
- "id": 534,
- "tag": "DANDI:000713"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 194,
- "tag": "Mus musculus - House mouse"
- }
- ],
- "timestamp_created": "2023-12-18 16:52:40.544691+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000713/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "275": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "0.241009.1516",
- "id": 275,
- "name": "Segmented and labeled NeuroPAL structural images",
- "repository_type": "dandi",
- "summary": "Segmented and labeled NeuroPAL datasets from \"Graphical-model framework for automated annotation of cell identities in dense cellular images\" by Shivesh Chaudhary, et al.",
- "tags": [
- {
- "id": 535,
- "tag": "DANDI:000714"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 394,
- "tag": "Caenorhabditis elegans"
- }
- ],
- "timestamp_created": "2023-12-18 16:52:41.762591+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000714/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "276": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "draft",
- "id": 276,
- "name": "NWB Cloud Benchmarks - HDF5",
- "repository_type": "dandi",
- "summary": "This dandiset is a collection of derived and generated assets used for rigorously assessing file configurations and their impact on performance in cloud environments.",
- "tags": [
- {
- "id": 536,
- "tag": "DANDI:000717"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 194,
- "tag": "Mus musculus - House mouse"
- },
- {
- "id": 4775,
- "tag": "benchmarking"
- },
- {
- "id": 4776,
- "tag": "cloud"
- },
- {
- "id": 4777,
- "tag": "performance"
- }
- ],
- "timestamp_created": "2023-12-18 16:52:42.990887+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000717/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "277": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "draft",
- "id": 277,
- "name": "Offline ensemble co-reactivation links memories across days",
- "repository_type": "dandi",
- "summary": "Memories are encoded in neural ensembles during learning and are\u00a0stabilized by post-learning reactivation. Integrating recent experiences into existing memories ensures that memories contain the most recently available information, but how the brain accomplishes this critical process remains unclear. Here we show that in mice, a strong aversive experience drives offline ensemble reactivation of not only the recent aversive memory but also a neutral memory formed 2 days before, linking fear of the recent aversive memory to the previous neutral memory. Fear specifically links retrospectively, but not prospectively, to neutral memories across days. Consistent with previous studies, we find that the recent aversive memory ensemble is reactivated during the offline period after learning. However, a strong aversive experience also increases co-reactivation of the aversive and neutral memory ensembles during the offline period. Ensemble co-reactivation occurs more during wake than during sleep. Finally, the expression of fear in the neutral context is associated with reactivation of the shared ensemble between the aversive and neutral memories. Collectively, these results demonstrate that offline ensemble co-reactivation is a neural mechanism by which memories are integrated across days.",
- "tags": [
- {
- "id": 537,
- "tag": "DANDI:000718"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 194,
- "tag": "Mus musculus - House mouse"
- },
- {
- "id": 4778,
- "tag": "aversive"
- },
- {
- "id": 4779,
- "tag": "co-activity"
- },
- {
- "id": 4780,
- "tag": "ensemble"
- },
- {
- "id": 92,
- "tag": "hippocampus"
- },
- {
- "id": 57,
- "tag": "learning"
- },
- {
- "id": 516,
- "tag": "memory"
- },
- {
- "id": 4781,
- "tag": "memory-linking"
- },
- {
- "id": 4782,
- "tag": "offline"
- },
- {
- "id": 4783,
- "tag": "reactivation"
- }
- ],
- "timestamp_created": "2023-12-18 16:52:44.228363+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000718/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "278": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "draft",
- "id": 278,
- "name": "NWB Cloud Benchmarks - Zarr",
- "repository_type": "dandi",
- "summary": "This dandiset is reserved by CatalystNeuro and will be published at a future point in time.",
- "tags": [
- {
- "id": 538,
- "tag": "DANDI:000719"
- },
- {
- "id": 181,
- "tag": "DANDI"
- }
- ],
- "timestamp_created": "2023-12-18 16:52:45.351100+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000719/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "279": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "0.240827.1809",
- "id": 279,
- "name": "Allen Institute - Visual Coding - Optical Physiology",
- "repository_type": "dandi",
- "summary": "From the Allen Institute Brain Observatory, the Visual Coding (optical physiology) dataset is a large-scale, standardized survey of physiological activity across the mouse visual cortex, hippocampus, and thalamus. This two-photon imaging dataset features visually evoked calcium responses from GCaMP6-expressing neurons in a range of cortical layers, visual areas, and Cre lines. We hope that experimentalists and modelers will use these comprehensive, open datasets as a testbed for theories of visual information processing.\n\nFull documentation of the Visual Coding Ophys dataset and tutorials can be found here: https://observatory.brain-map.org/visualcoding/\n\nThe Visual Coding Ecephys (NeuroPixels) dataset can be found here: https://dandiarchive.org/dandiset/000021\n\n",
- "tags": [
- {
- "id": 539,
- "tag": "DANDI:000728"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 194,
- "tag": "Mus musculus - House mouse"
- }
- ],
- "timestamp_created": "2023-12-18 16:52:46.600148+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000728/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "280": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 280,
- "name": "Primary Auditory Cortex network",
- "repository_type": "github",
- "summary": "",
- "tags": [
- {
- "id": 540,
- "tag": "OSBv1"
- },
- {
- "id": 541,
- "tag": "Pyramidal cell"
- },
- {
- "id": 542,
- "tag": "neuroConstruct"
- },
- {
- "id": 543,
- "tag": "Auditory system"
- },
- {
- "id": 544,
- "tag": "Detailed cell model"
- },
- {
- "id": 600,
- "tag": "GENESIS"
- },
- {
- "id": 601,
- "tag": "Neocortex"
- },
- {
- "id": 602,
- "tag": "Network model"
- },
- {
- "id": 603,
- "tag": "Rodent"
- }
- ],
- "timestamp_created": "2023-12-18 17:56:01.965658+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/ACnet2",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "281": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 281,
- "name": "Allen Institute & NeuroML",
- "repository_type": "github",
- "summary": "",
- "tags": [
- {
- "id": 540,
- "tag": "OSBv1"
- },
- {
- "id": 545,
- "tag": "Large scale brain initiative"
- },
- {
- "id": 601,
- "tag": "Neocortex"
- },
- {
- "id": 604,
- "tag": "Network"
- },
- {
- "id": 603,
- "tag": "Rodent"
- },
- {
- "id": 605,
- "tag": "SWC & others"
- }
- ],
- "timestamp_created": "2023-12-18 18:31:54.605116+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/AllenInstituteNeuroML",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "282": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 282,
- "name": "L5 Pyramidal Neuron - Almog and Korngreen 2014",
- "repository_type": "github",
- "summary": "Conversion to neuroConstruct and NeuroML of the L5 Pyramidal cell model described in:\n\nAlmog M, Korngreen A (2014) [A Quantitative Description of Dendritic Conductances and Its Application to Dendritic Excitation in Layer 5 Pyramidal Neurons](http://www.jneurosci.org/content/34/1/182) J Neurosci 34(1):182-196\n",
- "tags": [
- {
- "id": 540,
- "tag": "OSBv1"
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- "summary": "NEURON mod files for a Potassium current from the paper:\r\nBeech DJ, Barnes S.\r\nCharacterization of a voltage-gated K+ channel that accelerates \r\nthe rod response to dim light.\r\nNeuron 3:573-81 (1989).",
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- "summary": "Neuron mod and hoc files for the paper: Anderson, J.C. Binzegger, T., Kahana, O., Segev, I., and Martin, K.A.C Dendritic asymmetry cannot account for directional responses in visual cortex. Nature Neuroscience 2:820:824, 1999",
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- "name": "Pyramidal Neuron: Deep, Thalamic Relay and Reticular, Interneuron (Destexhe et al 1998, 2001)",
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- "summary": "This package shows single-compartment models of different classes of cortical neurons, such as the \"regular-spiking\", \"fast-spiking\" and \"bursting\" (LTS) neurons. The mechanisms included are the Na+ and K+ currents for generating action potentials (INa, IKd), the T-type calcium current (ICaT), and a slow voltage-dependent K+ current (IM). See http://cns.fmed.ulaval.ca/alain_demos.html",
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- "summary": "The classic HH model of squid axon membrane\r\nimplemented in NEURON.\r\nHodgkin, A.L., Huxley, A.F. (1952)",
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- "summary": "Modeling and experiments in the paper Chen K,Aradi I, Thom N,Eghbal-Ahmadi M, Baram TZ, and Soltesz I (2001) support the hypothesis that modified Ih currents strongly influence inhibitory inputs in CA1 cells and that the depolarizing shift in Ih activation plays a primary role in this process.\r\nPlease see the paper for details. Some modeling details are available at http://www.ucihs.uci.edu/anatomy/soltesz/supp.htm Correspondance should be addressed to isoltesz@uci.edu (modeling was done by Ildiko Aradi, iaradi@uci.edu)",
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- "id": 727,
- "tag": "Action Potential Initiation"
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- "name": "CA1 pyramidal neuron: effects of Lamotrigine on dendritic excitability (Poolos et al 2002)",
- "repository_type": "github",
- "summary": "NEURON mod files from N. Poolos, M. Migliore, and D. Johnston, Nature Neuroscience (2002).\r\nThe experimental and modeling results in this paper demonstrate for the first time that neuronal excitability can be altered by pharmaceuticals acting selectively on dendrites, and suggest an important role for Ih in controlling dendritic excitability and epileptogenesis.",
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- "tag": "Action Potentials"
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- "id": 469,
- "name": "Myelinated axon conduction velocity (Brill et al 1977)",
- "repository_type": "github",
- "summary": "Examines conduction velocity as function of\r\ninternodal length.",
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- "id": 728,
- "tag": "Axonal Action Potentials"
- },
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- "id": 576,
- "tag": "I K"
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- "timestamp_created": "2024-01-09 11:43:31.108694+00:00",
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- "last_name": "Admin",
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- ],
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- "id": 470,
- "name": "Temperature-Sensitive conduction at axon branch points (Westerfield et al 1978)",
- "repository_type": "github",
- "summary": "Propagation of impulses through branching regions of squid axons was examined experimentally and with computer simulations. The ratio of postbranch/prebranch diameters at which propagation failed was very sensitive to temperature.",
- "tags": [
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- "id": 728,
- "tag": "Axonal Action Potentials"
- },
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- "id": 745,
- "tag": "Conduction failure"
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- "id": 576,
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- "id": 577,
- "tag": "NEURON"
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- "tag": "ModelDB:9849"
- }
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- "timestamp_created": "2024-01-09 11:43:31.659831+00:00",
- "timestamp_updated": "---",
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- ],
- "default_context": "master",
- "id": 471,
- "name": "Conduction in uniform myelinated axons (Moore et al 1978)",
- "repository_type": "github",
- "summary": "Examines the relative sensitivity of the velocity of impulse propagation to changes in nodal and internodal parameters.",
- "tags": [
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- "id": 728,
- "tag": "Axonal Action Potentials"
- },
- {
- "id": 576,
- "tag": "I K"
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- "id": 574,
- "tag": "I Na,t"
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- "id": 564,
- "tag": "ModelDB"
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- "id": 735,
- "tag": "Multiple sclerosis"
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- "id": 577,
- "tag": "NEURON"
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- "id": 942,
- "tag": "ModelDB:9851"
- }
- ],
- "timestamp_created": "2024-01-09 11:43:32.130149+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/9851",
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- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
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- "472": {
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- "modeling"
- ],
- "default_context": "master",
- "id": 472,
- "name": "Site of impulse initiation in a neuron (Moore et al 1983)",
- "repository_type": "github",
- "summary": "Examines the effect of temperature, the taper of the axon hillock, and HH channel density on antidromic spike invasion into the soma and spike initiation under dendritic stimulation.",
- "tags": [
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- "id": 727,
- "tag": "Action Potential Initiation"
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- "id": 576,
- "tag": "I K"
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- "id": 574,
- "tag": "I Na,t"
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- "tag": "Simplified Models"
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- "id": 943,
- "tag": "ModelDB:9852"
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- "timestamp_created": "2024-01-09 11:43:32.591610+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/9852",
- "user": {
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- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
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- "id": 473,
- "name": "Current flow during PAP in squid axon at diameter change (Joyner et al 1980)",
- "repository_type": "github",
- "summary": "From the paper abstract: An impulse ... sees an increased electrical load at regions of increasing diameter or at branch points with certain morphologies. We present here theoretical and experimental studies on the changes in membrane current and axial current associated with diameter changes. The theoretical studies were done with numerical solutions for cable equations that were generalized to include a varying diameter; the Hodgkin-Huxley equations were used to represent the membrane properties. ... As an action potential approaches a region of increased electrical load, the action potential amplitude and rate of rise decrease, but there is a marked increase in the magnitude of the inward sodium current. ... (See paper for more details.)",
- "tags": [
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- "id": 728,
- "tag": "Axonal Action Potentials"
- },
- {
- "id": 576,
- "tag": "I K"
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- "id": 574,
- "tag": "I Na,t"
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- "id": 570,
- "tag": "Influence of Dendritic Geometry"
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- "id": 564,
- "tag": "ModelDB"
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- "id": 577,
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- "timestamp_created": "2024-01-09 11:43:33.055331+00:00",
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- "uri": "https://github.com/OpenSourceBrain/9853",
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- "first_name": "OSB",
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- "default_context": "master",
- "id": 474,
- "name": "Presynaptic calcium dynamics at neuromuscular junction (Stockbridge, Moore 1984)",
- "repository_type": "github",
- "summary": "The diffusion of calcium is effectively reduced\r\nby the ratio of bound to free calcium. Treating\r\nthe release magnitude as proportional to the\r\nfourth power of calcium concentration next to\r\nthe membrane gives reasonable facilitation\r\nwith very little release between spikes.",
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- "id": 572,
- "tag": "Calcium dynamics"
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- "id": 723,
- "tag": "Facilitation"
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- "tag": "ModelDB"
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- "id": 577,
- "tag": "NEURON"
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- "id": 724,
- "tag": "Short-term Synaptic Plasticity"
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- "id": 569,
- "tag": "Simplified Models"
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- "tag": "ModelDB:9888"
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- "timestamp_created": "2024-01-09 11:43:33.516572+00:00",
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- "uri": "https://github.com/OpenSourceBrain/9888",
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- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
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- "name": "Thalamic quiescence of spike and wave seizures (Lytton et al 1997)",
- "repository_type": "github",
- "summary": "A phase plane analysis of a two cell interaction between a thalamocortical neuron (TC) and a thalamic reticularis neuron (RE).",
- "tags": [
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- "id": 572,
- "tag": "Calcium dynamics"
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- "id": 575,
- "tag": "I T low threshold"
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- "id": 564,
- "tag": "ModelDB"
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- "id": 577,
- "tag": "NEURON"
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- "id": 585,
- "tag": "Oscillations"
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- "id": 720,
- "tag": "Temporal Pattern Generation"
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- "id": 946,
- "tag": "ModelDB:9889"
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- "timestamp_created": "2024-01-09 11:43:34.004390+00:00",
- "timestamp_updated": "---",
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- "first_name": "OSB",
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- "id": 476,
- "name": "Nerve terminal currents at lizard neuromuscular junction (Lindgren, Moore 1989)",
- "repository_type": "github",
- "summary": "Loose patch clamp measurement of presynaptic ionic currents at lizard neuromuscular junction compared with computer simulations.",
- "tags": [
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- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 576,
- "tag": "I K"
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- "id": 574,
- "tag": "I Na,t"
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- "tag": "Ion Channel Kinetics"
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- "timestamp_created": "2024-01-09 11:43:34.463741+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/10360",
- "user": {
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- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
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- "id": 477,
- "name": "Computer model of clonazepam's effect in thalamic slice (Lytton 1997)",
- "repository_type": "github",
- "summary": "Demonstration of the effect of a minor pharmacological synaptic\r\nchange at the network level. Clonazepam, a benzodiazepine, enhances\r\ninhibition but is paradoxically useful for certain types of\r\nseizures. This simulation shows how inhibition of\r\ninhibitory cells (the RE cells) produces this counter-intuitive\r\neffect.",
- "tags": [
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 566,
- "tag": "Bursting"
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- "tag": "Calcium dynamics"
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- {
- "id": 469,
- "tag": "Epilepsy"
- },
- {
- "id": 731,
- "tag": "I CAN"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 574,
- "tag": "I Na,t"
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- "id": 575,
- "tag": "I T low threshold"
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- "id": 564,
- "tag": "ModelDB"
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- {
- "id": 577,
- "tag": "NEURON"
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- {
- "id": 746,
- "tag": "Therapeutics"
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- "id": 948,
- "tag": "ModelDB:12631"
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- "timestamp_updated": "---",
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- "id": 478,
- "name": "Thalamic reticular neurons: the role of Ca currents (Destexhe et al 1996)",
- "repository_type": "github",
- "summary": "The experiments and modeling reported in this paper show how intrinsic bursting properties of RE cells may be explained by dendritic calcium currents.",
- "tags": [
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- "id": 727,
- "tag": "Action Potential Initiation"
- },
- {
- "id": 736,
- "tag": "Action Potentials"
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- "id": 579,
- "tag": "Active Dendrites"
- },
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- "id": 566,
- "tag": "Bursting"
- },
- {
- "id": 572,
- "tag": "Calcium dynamics"
- },
- {
- "id": 565,
- "tag": "Dendritic Action Potentials"
- },
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 575,
- "tag": "I T low threshold"
- },
- {
- "id": 570,
- "tag": "Influence of Dendritic Geometry"
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- {
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- "tag": "ModelDB"
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- "tag": "NEURON"
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- "tag": "Simplified Models"
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- {
- "id": 949,
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- "uri": "https://github.com/OpenSourceBrain/17663",
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- "first_name": "OSB",
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- "id": 479,
- "name": "Cerebellar purkinje cell: K and Ca channels regulate APs (Miyasho et al 2001)",
- "repository_type": "github",
- "summary": "We adopted De Schutter and Bower's model as the starting point, then modified the descriptions of\r\nseveral ion channels, such as the P-type Ca channel and the delayed rectifier K channel, and added class-E Ca channels and D-type K channels to the model. Our new model reproduces most of our experimental results and supports the conclusions of our experimental study that class-E Ca channels and D-type K channels are present and functioning in the dendrites of Purkinje neurons.",
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- {
- "id": 727,
- "tag": "Action Potential Initiation"
- },
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- "id": 736,
- "tag": "Action Potentials"
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- "tag": "Active Dendrites"
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- "tag": "Activity Patterns"
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- "id": 566,
- "tag": "Bursting"
- },
- {
- "id": 572,
- "tag": "Calcium dynamics"
- },
- {
- "id": 565,
- "tag": "Dendritic Action Potentials"
- },
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 730,
- "tag": "I A, slow"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 580,
- "tag": "I M"
- },
- {
- "id": 739,
- "tag": "I Na,p"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 582,
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- "summary": "Glutamatergic transmission at a principal neuron-interneuron synapse was investigated by dual whole-cell patch-clamp recording in rat hippocampal slices combined with morphological analysis and modeling. Simulations based on a compartmental model of the interneuron indicated that the rapid postsynaptic conductance change determines the shape and the somatodendritic integration of EPSPs, thus enabling interneurons to detect synchronous principal neuron activity.",
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- "summary": "This model allows the user to investigate faciliation and depression in a complex Monte Carlo model of the calyx of Held, a giant synapse in the mammalian auditory system (Graham et al, 2001)",
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- "tag": "Vestibular"
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- "timestamp_created": "2024-01-09 11:43:45.491614+00:00",
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- "id": 498,
- "name": "T-type Calcium currents (McRory et al 2001)",
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- "summary": "NEURON mod files for CaT currents from the paper\r\nMcRory et al., J.Biol.Chem. 276:3999 (2001).\r\nIn this paper, three members (alpha-1G, -1H, and -1I) of the LVA calcium channels family were studied. Kinetic parameters were derived from functional expression in transfected cells.",
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- "id": 575,
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- "id": 567,
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- "summary": "The somatopetal current transfer was studied in mathematical models of a reconstructed brainstem motoneuron with tonically activated excitatory synaptic inputs uniformly distributed over the dendritic arborization. See paper and below readme.txt for more information.",
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- "summary": "NEURON mod files for slow and fast K-DR, and K-A potassium currents in inhibitory interneurones of stratum oriens-alveus of the hippocampal CA1 region.",
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- "summary": "This simulation is based on the reference paper listed below.\r\nThis port was made by Roger D Traub and Maciej T Lazarewicz (mlazarew at seas.upenn.edu)\r\n\r\nThanks to Ashlen P Reid for help with porting a morphology of the cell.",
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- "summary": "Computer models were used to investigate passive properties of lateral geniculate nucleus thalamocortical cells and thalamic\r\ninterneurons based on in vitro whole-cell study. Two neurons of each type were characterized physiologically and morphologically. Differences in the attenuation of propagated signals depend on both cell morphology and signal frequency. See the paper for details.",
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- "name": "CA1 pyramidal neuron: effects of Ih on distal inputs (Migliore et al 2004)",
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- "summary": "NEURON mod files from the paper:\r\nM. Migliore, L. Messineo, M. Ferrante\r\nDendritic Ih selectively blocks temporal summation of unsynchronized distal inputs in CA1 pyramidal neurons, J.Comput. Neurosci. 16:5-13 (2004).\r\nThe model demonstrates how the dendritic Ih in pyramidal neurons could selectively suppress AP generation for a volley of excitatory afferents \r\nwhen they are asynchronously and distally activated.\r\n",
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- "id": 727,
- "tag": "Action Potential Initiation"
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- "summary": "Model of recurrent cyclic inhibition as described on p.119 of Friesen and Friesen (1994), which was slightly modified from Szekely's model (1965) of a network for producing alternating limb movements.",
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- "id": 578,
- "tag": "Activity Patterns"
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- "id": 566,
- "tag": "Bursting"
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- "name": "Serotonergic modulation of Aplysia sensory neurons (Baxter et al 1999)",
- "repository_type": "github",
- "summary": "The present study investigated how the modulation of these currents altered the spike duration\r\nand excitability of sensory neurons and examined the relative contributions\r\nof PKA- and PKC-mediated effects to the actions of 5-HT. A\r\nHodgkin-Huxley type model was developed that described the ionic\r\nconductances in the somata of sensory neurons. The descriptions of\r\nthese currents and their modulation were based largely on voltageclamp\r\ndata from sensory neurons. Simulations were preformed with\r\nthe program SNNAP (Simulator for Neural Networks and Action\r\nPotentials). The model was sufficient to replicate empirical data that\r\ndescribes the membrane currents, action potential waveform and\r\nexcitability as well as their modulation by application of 5-HT,\r\nincreased levels of adenosine cyclic monophosphate or application of\r\nactive phorbol esters. The results provide\r\nseveral predictions that warrant additional experimental investigation\r\nand illustrate the importance of considering indirect as well as direct\r\neffects of modulatory agents on the modulation of membrane currents. See paper for more details.",
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- "tag": "Action Potentials"
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- "id": 590,
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- "tag": "I CAN"
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- "name": "Enhanced Excitability in Hermissenda: modulation by 5-HT (Cai et al 2003)",
- "repository_type": "github",
- "summary": "Serotonin (5-HT) applied to the exposed but otherwise intact nervous system results in enhanced excitability\r\nof Hermissenda type-B photoreceptors. Several ion currents in the type-B photoreceptors are modulated\r\nby 5-HT, including the A-type K+ current (IK,A), sustained Ca2+ current (ICa,S), Ca-dependent K+ current (IK,Ca),\r\nand a hyperpolarization-activated inward rectifier current (Ih). In this study,we developed a computational model that\r\nreproduces physiological characteristics of type B photoreceptors, e.g. resting membrane potential, dark-adapted\r\nspike activity, spike width, and the amplitude difference between somatic and axonal spikes. We then used the\r\nmodel to investigate the contribution of different ion currents modulated by 5-HT to the magnitudes of enhanced\r\nexcitability produced by 5-HT. See paper for results and more details.",
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- "tag": "Action Potentials"
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- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 730,
- "tag": "I A, slow"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 589,
- "tag": "I L high threshold"
- },
- {
- "id": 721,
- "tag": "I N"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 729,
- "tag": "Invertebrate"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 757,
- "tag": "SNNAP"
- },
- {
- "id": 986,
- "tag": "ModelDB:34163"
- }
- ],
- "timestamp_created": "2024-01-11 13:52:06.482802+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/34163",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "516": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 516,
- "name": "Burst induced synaptic plasticity in Apysia sensorimotor neurons (Phares et al 2003)",
- "repository_type": "github",
- "summary": "The Aplysia sensorimotor synapse is a key site of plasticity for several simple forms of learning. Intracellular stimulation of sensory neurons to fire a burst of action potentials at 10 Hz for 1 sec led to significant\r\nhomosynaptic depression of postsynaptic responses. During the burst, the steady-state depressed phase of the postsynaptic response, which was only 20% of the initial EPSP of the burst, still contributed to firing the motor neuron. To explore the functional contribution of transient homosynaptic depression to the response of the motor neuron, computer simulations of the sensorimotor synapse with and without depression were compared. Depression allowed the motor\r\nneuron to produce graded responses over a wide range of presynaptic input strength. \r\nThus, synaptic depression increased the dynamic range of the sensorimotor synapse and can, in principle, have a profound effect on\r\ninformation processing. Please see paper for results and details.",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 722,
- "tag": "Depression"
- },
- {
- "id": 723,
- "tag": "Facilitation"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 730,
- "tag": "I A, slow"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 721,
- "tag": "I N"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 729,
- "tag": "Invertebrate"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 757,
- "tag": "SNNAP"
- },
- {
- "id": 758,
- "tag": "Sensory processing"
- },
- {
- "id": 725,
- "tag": "Synaptic Plasticity"
- },
- {
- "id": 987,
- "tag": "ModelDB:34168"
- }
- ],
- "timestamp_created": "2024-01-11 13:52:07.218212+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/34168",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "517": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 517,
- "name": "Caffeine-induced electrical oscillations in Aplysia neurons (Komendantov, Kononenko 2000)",
- "repository_type": "github",
- "summary": "It has been found that in cultured Aplysia neurons bath applications of 40 mM cafffeine evokes oscillations of the membrane potential with about a 40 mV amplitude with a frequency of 0.2 to 0.5 Hz. The most probable mechanism of these caffeine-induced oscillations is inhibition of voltage-activated outward potassium current and, as can be seen from our mathematical modeling, slowdown of inactivation of inward sodium current. It seems likely that these oscillations have a purely membrane origin. Please see paper for results and details.",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 566,
- "tag": "Bursting"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 729,
- "tag": "Invertebrate"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 757,
- "tag": "SNNAP"
- },
- {
- "id": 988,
- "tag": "ModelDB:34558"
- }
- ],
- "timestamp_created": "2024-01-11 13:52:07.744081+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/34558",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "518": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 518,
- "name": "I A in Kenyon cells resemble Shaker currents (Pelz et al 1999)",
- "repository_type": "github",
- "summary": "Cultured Kenyon cells from the mushroom body of the honeybee,\r\nApis mellifera, show a voltage-gated, fast transient K1 current that is\r\nsensitive to 4-aminopyridine, an A current. The kinetic properties of\r\nthis A current and its modulation by extracellular K1 ions were\r\ninvestigated in vitro with the whole cell patch-clamp technique. The\r\nA current was isolated from other voltage-gated currents either pharmacologically\r\nor with suitable voltage-clamp protocols. Hodgkin- and\r\nHuxley-style mathematical equations were used for the description of\r\nthis current and for the simulation of action potentials in a Kenyon cell\r\nmodel. The data of the A\r\ncurrent were incorporated into a reduced computational model of the\r\nvoltage-gated currents of Kenyon cells. In addition, the model contained\r\na delayed rectifier K current, a Na current, and a leakage\r\ncurrent. The model reproduces several experimental features and makes \r\npredictions. See paper for details and results.",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 729,
- "tag": "Invertebrate"
- },
- {
- "id": 567,
- "tag": "Ion Channel Kinetics"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 568,
- "tag": "Parameter Fitting"
- },
- {
- "id": 757,
- "tag": "SNNAP"
- },
- {
- "id": 989,
- "tag": "ModelDB:34560"
- }
- ],
- "timestamp_created": "2024-01-11 13:52:08.281603+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/34560",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "519": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 519,
- "name": "A network model of tail withdrawal in Aplysia (White et al 1993)",
- "repository_type": "github",
- "summary": "The contributions of monosynaptic and polysynaptic circuitry to the tail-withdrawal reflex in the marine mollusk Aplysia californica were assessed by the use of physiologically based neural network models. Effects of monosynaptic circuitry were examined by the use of a two-layer network model with four sensory neurons in the input layer and one motor neuron in the output layer. Results of these simulations indicated that the monosynaptic circuit could not account fully for long-duration responses of tail motor neurons elicited by tail stimulation.\r\nA three-layer network model was constructed by interposing a layer of two excitatory interneurons between the input and output layers of the two-layer network model. The three-layer model could account for long-duration responses in motor neurons. Sensory neurons are a known site of plasticity in Aplysia. Synaptic plasticity at more than one locus modified dramatically the input-output relationship of the three-layer network model. This feature gave the model redundancy in its plastic properties and points to the possibility of distributed memory in the circuitry mediating withdrawal reflexes in Aplysia.\r\nPlease see paper for more results and details.",
- "tags": [
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 566,
- "tag": "Bursting"
- },
- {
- "id": 723,
- "tag": "Facilitation"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 730,
- "tag": "I A, slow"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 589,
- "tag": "I L high threshold"
- },
- {
- "id": 721,
- "tag": "I N"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 729,
- "tag": "Invertebrate"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 757,
- "tag": "SNNAP"
- },
- {
- "id": 725,
- "tag": "Synaptic Plasticity"
- },
- {
- "id": 990,
- "tag": "ModelDB:34606"
- }
- ],
- "timestamp_created": "2024-01-11 13:52:08.765057+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/34606",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "520": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 520,
- "name": "CA3 pyramidal cell: rhythmogenesis in a reduced Traub model (Pinsky, Rinzel 1994)",
- "repository_type": "github",
- "summary": "Fig. 2A and 3 are reproduced in this simulation of Pinsky PF, Rinzel J (1994).",
- "tags": [
- {
- "id": 579,
- "tag": "Active Dendrites"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 589,
- "tag": "I L high threshold"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 759,
- "tag": "XPPAUT"
- },
- {
- "id": 991,
- "tag": "ModelDB:35358"
- }
- ],
- "timestamp_created": "2024-01-11 13:52:09.258486+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/35358",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "521": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 521,
- "name": "Stochastic LTP/LTD conditioning of a synapse (Migliore and Lansky 1999)",
- "repository_type": "github",
- "summary": "Protracted presynaptic activity can induce long-term potentiation\r\n(LTP) or long-term depression (LTD) of the synaptic strength. However,\r\nvirtually all the experiments testing how LTP and LTD depend on the\r\nconditioning input are carried out with trains of stimuli at constant\r\nfrequencies, whereas neurons in vivo most likely experience a stochastic\r\nvariation of interstimulus intervals. We used a computational model of\r\nsynaptic transmission to test if and to what extent the stochastic\r\nfluctuations of an input signal could alter the probability to change the\r\nstate of a synapse. See paper for conclusions.",
- "tags": [
- {
- "id": 722,
- "tag": "Depression"
- },
- {
- "id": 723,
- "tag": "Facilitation"
- },
- {
- "id": 749,
- "tag": "Long-term Synaptic Plasticity"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 760,
- "tag": "Post-Tetanic Potentiation"
- },
- {
- "id": 761,
- "tag": "QBasic/QuickBasic/Turbo Basic/VBA"
- },
- {
- "id": 725,
- "tag": "Synaptic Plasticity"
- },
- {
- "id": 992,
- "tag": "ModelDB:35781"
- }
- ],
- "timestamp_created": "2024-01-11 13:52:09.740186+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/35781",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "522": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 522,
- "name": "Auditory nerve model for predicting performance limits (Heinz et al 2001)",
- "repository_type": "github",
- "summary": "A computational auditory nerve (AN) model was developed for\r\nuse in modeling psychophysical experiments with normal and impaired\r\nhuman listeners. In this phenomenological model, many physiologically\r\nvulnerable response properties associated with the cochlear amplifier are\r\nrepresented by a single nonlinear control mechanism, see paper for details. Several model versions are described that\r\ncan be used to evaluate the relative effects of these nonlinear properties.",
- "tags": [
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 762,
- "tag": "Audition"
- },
- {
- "id": 755,
- "tag": "C or Cplusplus program"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 720,
- "tag": "Temporal Pattern Generation"
- },
- {
- "id": 993,
- "tag": "ModelDB:36834"
- }
- ],
- "timestamp_created": "2024-01-11 13:52:10.245357+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/36834",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "523": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 523,
- "name": "Model of cochlear membrane adapted (Peterson, Bogert 1950)",
- "repository_type": "github",
- "summary": "This model, adapted from Peterson and Bogert (1950), simulates the response of the gerbil basilar membrane to a pure tone stimulus. This model does not attempt to simulate the effect of outer hair cell motility. The program prompts the user for the stimulus frequency and the Q (quality factor) for the basilar membrane impedance. It then plots cochlear partition volume velocity, the pressure difference across the partition and the cochlear partition impedance as a function of cochlear location. More information on the actual computations are contained in comments within the m-file.",
- "tags": [
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 994,
- "tag": "ModelDB:36861"
- }
- ],
- "timestamp_created": "2024-01-11 13:52:10.728825+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/36861",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "524": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 524,
- "name": "Inner hair cell auditory nerve synapse model (Deligeorges, Mountain 1997)",
- "repository_type": "github",
- "summary": "This model simulates the response of the synapse between the inner hair cell and an auditory nerve fiber to a square voltage pulse applied to the IHC membrane. The model output is average firing rate. More details of this model can be found in: Deligeorges and Mountain.",
- "tags": [
- {
- "id": 762,
- "tag": "Audition"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 995,
- "tag": "ModelDB:36869"
- }
- ],
- "timestamp_created": "2024-01-11 13:52:11.193130+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/36869",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "525": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 525,
- "name": "Multiple modes of inner hair cell stimulation (Mountain, Cody 1999)",
- "repository_type": "github",
- "summary": "This model simulates the membrane potential of an inner hair cell for a sinusoidal stimulus to the hair bundle. It uses a 2-state Boltzmann model for the tension-gated conductance in the stereocilia and a linear model for the basolateral membrane. This model is based on the IHC model used in Mountain and Cody (1999).",
- "tags": [
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 720,
- "tag": "Temporal Pattern Generation"
- },
- {
- "id": 996,
- "tag": "ModelDB:36956"
- }
- ],
- "timestamp_created": "2024-01-11 13:52:11.682311+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/36956",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "526": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 526,
- "name": "Auditory nerve response model (Zhang et al 2001)",
- "repository_type": "github",
- "summary": "A phenomenological model was developed to describe responses of high-spontaneous-rate auditory-nerve (AN) fibers, including several nonlinear response properties. The implementation of this model represents a relatively simple phenomenological description of a single mechanism that underlies several important nonlinear response properties of AN fibers. The model provides a tool for studying the roles of these nonlinearities in the encoding of simple and complex sounds in the responses of populations of AN fibers.",
- "tags": [
- {
- "id": 755,
- "tag": "C or Cplusplus program"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 720,
- "tag": "Temporal Pattern Generation"
- },
- {
- "id": 997,
- "tag": "ModelDB:37103"
- }
- ],
- "timestamp_created": "2024-01-11 13:52:12.149863+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/37103",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "527": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 527,
- "name": "Auditory nerve response model (Tan, Carney 2003)",
- "repository_type": "github",
- "summary": "A computational model was developed to simulate the responses of auditory-nerve (AN) fibers in cat. The incorporation of both the level-independent frequency glide and the level-dependent compressive nonlinearity into a phenomenological model for the AN was the primary focus of this work. The ability of this model to process arbitrary sound inputs makes it a useful tool for studying peripheral auditory processing.",
- "tags": [
- {
- "id": 755,
- "tag": "C or Cplusplus program"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
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- {
- "id": 720,
- "tag": "Temporal Pattern Generation"
- },
- {
- "id": 998,
- "tag": "ModelDB:37129"
- }
- ],
- "timestamp_created": "2024-01-11 13:52:12.645998+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/37129",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "528": {
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- "modeling"
- ],
- "default_context": "master",
- "id": 528,
- "name": "Auditory nerve model with linear tuning (Heinz et al 2001)",
- "repository_type": "github",
- "summary": "A method for calculating psychophysical performance limits based on stochastic \r\nneural responses is introduced and compared to previous analytical methods for \r\nevaluating auditory discrimination of tone frequency and level. The method uses \r\nsignal detection theory and a computational model for a population of auditory \r\nnerve (AN) fiber responses. Please see paper for details.",
- "tags": [
- {
- "id": 755,
- "tag": "C or Cplusplus program"
- },
- {
- "id": 655,
- "tag": "MATLAB"
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- {
- "id": 564,
- "tag": "ModelDB"
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- {
- "id": 720,
- "tag": "Temporal Pattern Generation"
- },
- {
- "id": 999,
- "tag": "ModelDB:37436"
- }
- ],
- "timestamp_created": "2024-01-11 13:52:13.133991+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/37436",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "529": {
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- "modeling"
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- "default_context": "master",
- "id": 529,
- "name": "Thalamocortical augmenting response (Bazhenov et al 1998)",
- "repository_type": "github",
- "summary": "In the cortical model, augmenting responses were more powerful in the \"input\" layer compared with those in the \"output\" layer. Cortical stimulation of the network model produced augmenting responses in cortical neurons in distant cortical areas through corticothalamocortical loops and low-threshold intrathalamic augmentation. ... The predictions of the model were compared with in vivo recordings from neurons in cortical area 4 and thalamic ventrolateral nucleus of anesthetized cats. The known intrinsic properties of thalamic cells and thalamocortical interconnections can account for the basic properties of cortical augmenting responses. See reference for details. NEURON implementation note: cortical SU cells are getting slightly too little stimulation - reason unknown.",
- "tags": [
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 574,
- "tag": "I Na,t"
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- "id": 575,
- "tag": "I T low threshold"
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- "id": 564,
- "tag": "ModelDB"
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- {
- "id": 577,
- "tag": "NEURON"
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- {
- "id": 596,
- "tag": "Synaptic Integration"
- },
- {
- "id": 586,
- "tag": "Synchronization"
- },
- {
- "id": 1000,
- "tag": "ModelDB:37819"
- }
- ],
- "timestamp_created": "2024-01-11 13:52:13.630225+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/37819",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "530": {
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- "default_context": "master",
- "id": 530,
- "name": "CN pyramidal fusiform cell (Kanold, Manis 2001)",
- "repository_type": "github",
- "summary": "Pyramidal cells in the dorsal cochlear nucleus (DCN) show three characteristic discharge patterns in response tones: pauser, buildup, and regular firing. Experimental evidence suggests that a rapidly inactivating K+ current (I(KIF)) plays a critical role in generating these discharge patterns. To explore the role of I(KIF), we used a computational model based on the biophysical data. The model replicated the dependence of the discharge pattern on the magnitude and duration of hyperpolarizing prepulses, and I(KIF) was necessary to convey this dependence. Experimentally, half-inactivation voltage and kinetics of I(KIF) show wide variability. Varying these parameters in the model ... suggests that pyramidal cells can adjust their sensitivity to different temporal patterns of inhibition and excitation by modulating the kinetics of I(KIF). Overall, I(KIF) is a critical conductance controlling the excitability of DCN pyramidal cells. (See readme.txt and paper for details).\r\n\r\nAny questions regarding these implementations should be directed to:\r\npmanis@med.unc.edu\r\n\r\n2 April 2004\r\nPaul B Manis, Ph.D.",
- "tags": [
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 582,
- "tag": "I Sodium"
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- "id": 594,
- "tag": "I h"
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- "id": 564,
- "tag": "ModelDB"
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- "id": 577,
- "tag": "NEURON"
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- {
- "id": 596,
- "tag": "Synaptic Integration"
- },
- {
- "id": 720,
- "tag": "Temporal Pattern Generation"
- },
- {
- "id": 1001,
- "tag": "ModelDB:37856"
- }
- ],
- "timestamp_created": "2024-01-11 13:52:14.102032+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/37856",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "modeling"
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- "default_context": "master",
- "id": 531,
- "name": "CN bushy, stellate neurons (Rothman, Manis 2003)",
- "repository_type": "github",
- "summary": "Using kinetic data from three different K+ currents in acutely isolated neurons, a single electrical compartment model representing the soma of a ventral cochlear nucleus (VCN) neuron was created. The K+ currents include a fast transient current (IA), a slow-inactivating low-threshold current (ILT), and a noninactivating high-threshold current (IHT). The model also includes a fast-inactivating Na+ current, a hyperpolarization-activated cation current (Ih), and 1-50 auditory nerve synapses. With this model, the role IA, ILT, and IHT play in shaping the discharge patterns of VCN cells is explored. Simulation results indicate these currents have specific roles in shaping the firing patterns of stellate and bushy CN cells. (see readme.txt and the papers, esp 2003c, for details). Any questions regarding these implementations should be directed to: pmanis@med.unc.edu 2 April 2004 Paul B Manis, Ph.D.",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 762,
- "tag": "Audition"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 591,
- "tag": "I K,leak"
- },
- {
- "id": 589,
- "tag": "I L high threshold"
- },
- {
- "id": 739,
- "tag": "I Na,p"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 720,
- "tag": "Temporal Pattern Generation"
- },
- {
- "id": 1002,
- "tag": "ModelDB:37857"
- }
- ],
- "timestamp_created": "2024-01-11 13:52:14.584732+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/37857",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "532": {
- "auto_sync": true,
- "content_types": "modeling",
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- "modeling"
- ],
- "default_context": "master",
- "id": 532,
- "name": "Artificial neuron model (Izhikevich 2003, 2004, 2007)",
- "repository_type": "github",
- "summary": "A set of models is presented based on 2 related\r\nparameterizations to reproduce spiking and bursting behavior of multiple\r\ntypes of cortical neurons and thalamic neurons. These models combine the\r\nbiologically plausibility of Hodgkin Huxley-type dynamics and the\r\ncomputational efficiency of integrate-and-fire neurons. Using these\r\nmodel, one can simulate tens of thousands of spiking cortical neurons in\r\nreal time (1 ms resolution) using a desktop PC.",
- "tags": [
- {
- "id": 727,
- "tag": "Action Potential Initiation"
- },
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 568,
- "tag": "Parameter Fitting"
- },
- {
- "id": 569,
- "tag": "Simplified Models"
- },
- {
- "id": 732,
- "tag": "Tutorial/Teaching"
- },
- {
- "id": 1003,
- "tag": "ModelDB:39948"
- }
- ],
- "timestamp_created": "2024-01-11 13:52:15.081093+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/39948",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "533": {
- "auto_sync": true,
- "content_types": "modeling",
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- "modeling"
- ],
- "default_context": "master",
- "id": 533,
- "name": "Spiny neuron model with dopamine-induced bistability (Gruber et al 2003)",
- "repository_type": "github",
- "summary": "These files implement a model of dopaminergic modulation of voltage-gated currents (called kir2 and caL in the original paper). See spinycell.html for details of usage and implementation. For questions about this implementation, contact Ted Carnevale (ted.carnevale@yale.edu)",
- "tags": [
- {
- "id": 730,
- "tag": "I A, slow"
- },
- {
- "id": 591,
- "tag": "I K,leak"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 763,
- "tag": "Intrinsic plasticity"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 1004,
- "tag": "ModelDB:39949"
- }
- ],
- "timestamp_created": "2024-01-11 13:52:15.580829+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/39949",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "534": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 534,
- "name": "Sparsely connected networks of spiking neurons (Brunel 2000)",
- "repository_type": "github",
- "summary": "The dynamics of networks of sparsely connected excitatory and inhibitory integrate-and-fire neurons\r\nare studied analytically (and with simulations). The analysis reveals a rich repertoire of states, including synchronous states in which\r\nneurons fire regularly; asynchronous states with stationary global activity and very irregular individual cell activity;\r\nand states in which the global activity oscillates but individual cells fire irregularly, typically at rates lower than\r\nthe global oscillation frequency. See paper for more and details.",
- "tags": [
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 611,
- "tag": "NEST"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 569,
- "tag": "Simplified Models"
- },
- {
- "id": 587,
- "tag": "Spatio-temporal Activity Patterns"
- },
- {
- "id": 1005,
- "tag": "ModelDB:42020"
- }
- ],
- "timestamp_created": "2024-01-11 13:52:16.068794+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/42020",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "535": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 535,
- "name": "Kenyon cells in the honeybee (Wustenberg et al 2004)",
- "repository_type": "github",
- "summary": "The mushroom body of the insect brain is an important locus for olfactory information\r\nprocessing and associative learning. ... Current- and voltage-clamp analyses were\r\nperformed on cultured Kenyon cells from honeybees. ... Voltage-clamp analyses characterized a\r\nfast transient Na+ current (INa), a delayed rectifier K+ current (IK,V) and a fast transient K+ current\r\n(IK,A). Using the neurosimulator SNNAP, a Hodgkin-Huxley type model was developed and\r\nused to investigate the roles of the different currents during spiking. The model led to the\r\nprediction of a slow transient outward current (IK,ST) that was subsequently identified by reevaluating\r\nthe voltage-clamp data. Simulations indicated that the primary currents that underlie\r\nspiking are INa and IK,V, whereas IK,A and IK,ST primarily determined the responsiveness of the\r\nmodel to stimuli such constant or oscillatory injections of current. See paper for more details.",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 730,
- "tag": "I A, slow"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 591,
- "tag": "I K,leak"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 729,
- "tag": "Invertebrate"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 588,
- "tag": "Olfaction"
- },
- {
- "id": 757,
- "tag": "SNNAP"
- },
- {
- "id": 1006,
- "tag": "ModelDB:42022"
- }
- ],
- "timestamp_created": "2024-01-11 13:52:16.601453+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/42022",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "536": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 536,
- "name": "Touch Sensory Cells (T Cells) of the Leech (Cataldo et al. 2004) (Scuri et al. 2007)",
- "repository_type": "github",
- "summary": "Bursts of spikes in leech T cells produce an AHP, which results from activation of a Na+/K+ pump and \r\na Ca2+-dependent K+ current. Activity-dependent increases in the AHP are believed to induce conduction \r\nblock of spikes in several regions of the neuron, which in turn, may decrease presynaptic invasion of spikes and \r\nthereby decrease transmitter release. To explore this possibility, we used the neurosimulator SNNAP to develop \r\na multi-compartmental model of the T cell. Each compartment was modeled as an equivalent electrical circuit, \r\nin which some currents were regulated by intracellular Ca2+ and Na+. The membrane model consisted of \r\na membrane capacitance (Cm), for which we used the value 1 uF/cm2, in parallel with \r\ntwo inward currents (Na+ and Ca2+), two K+ currents, a leak current and pump current. \r\nThe model incorporated empirical data that describe the geometry of the cell and activity-dependent changes of the\r\nAHP (see paper for details). \r\nSimulations indicated that at some branching points, activity-dependent increases of the AHP reduced the number \r\nof spikes transmitted from the minor receptive field to the soma and beyond. \r\nThese results suggest that the AHP can regulate spike conduction within the presynaptic arborizations of the cell and \r\ncould in principle contribute to the synaptic depression that is correlated with increases in the AHP.",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 728,
- "tag": "Axonal Action Potentials"
- },
- {
- "id": 745,
- "tag": "Conduction failure"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 589,
- "tag": "I L high threshold"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 729,
- "tag": "Invertebrate"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 740,
- "tag": "Na/K pump"
- },
- {
- "id": 757,
- "tag": "SNNAP"
- },
- {
- "id": 741,
- "tag": "Sodium pump"
- },
- {
- "id": 764,
- "tag": "Touch"
- },
- {
- "id": 1007,
- "tag": "ModelDB:42036"
- }
- ],
- "timestamp_created": "2024-01-11 13:52:17.161911+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/42036",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "537": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 537,
- "name": "Effects of Acetyl-L-carnitine on neural transmission (Lombardo et al 2004)",
- "repository_type": "github",
- "summary": "Acetyl-L-carnitine is known to improve many aspects of the neural activity even if its exact role in neurotransmission is \r\nstill unknown. This study investigates the effects of acetyl-L-carnitine in T segmental sensory neurons of the leech Hirudo \r\nmedicinalis. These neurons are involved in some forms of neural plasticity associated with learning processes. \r\nTheir physiological firing is accompanied by a large afterhyperpolarization that is mainly due to the Na+/K+ ATPase \r\nactivity and partially to a Ca2+-dependent K+ current. A clear-cut hyperpolarization and a significant increase of the \r\nafterhyperpolarization have been recorded in T neurons of leeches injected with 2 mM acetyl-L-carnitine some days \r\nbefore. Acute treatments of 50 mM acetyl-L-carnitine induced similar effects in T cells of naive animals. \r\nMoreover, in these cells, widely arborized, the afterhyperpolarization seems to play an important role in determining \r\nthe action potential transmission at neuritic bifurcations. \r\nA computational model of a T cell has been previously developed considering detailed data for geometry and the \r\nmodulation of the pump current. Herein, we showed that to a larger afterhyperpolarization, due to the \r\nacetyl-L-carnitine-induced effects, corresponds a decrement in the number of action potentials \r\nreaching synaptic terminals.",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 728,
- "tag": "Axonal Action Potentials"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 589,
- "tag": "I L high threshold"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 729,
- "tag": "Invertebrate"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 740,
- "tag": "Na/K pump"
- },
- {
- "id": 757,
- "tag": "SNNAP"
- },
- {
- "id": 741,
- "tag": "Sodium pump"
- },
- {
- "id": 1008,
- "tag": "ModelDB:42037"
- }
- ],
- "timestamp_created": "2024-01-11 13:52:17.688514+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/42037",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "538": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
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- "default_context": "master",
- "id": 538,
- "name": "Squid axon (Hodgkin, Huxley 1952) (SNNAP)",
- "repository_type": "github",
- "summary": "The classic HH model of squid axon membrane\r\nimplemented in SNNAP.\r\nHodgkin, A.L., Huxley, A.F. (1952)",
- "tags": [
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- "id": 736,
- "tag": "Action Potentials"
- },
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- "id": 576,
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- "id": 574,
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- "timestamp_created": "2024-01-11 13:52:18.174308+00:00",
- "timestamp_updated": "---",
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- "name": "Morris-Lecar model of the barnacle giant muscle fiber (Morris, Lecar 1981)",
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- "summary": "... This paper presents an analysis of the possible modes of behavior available to a system of two noninactivating conductance mechanisms, and indicates a good correspondence to the types of behavior exhibited by barnacle fiber. The differential equations of a simple equivalent circuit for the fiber are dealt with by means of some of the mathematical techniques of nonlinear mechanics. General features of the system are (a) a propensity to produce damped or sustained oscillations over a rather broad parameter range, and (b) considerable latitude in the shape of the oscillatory potentials. It is concluded that for cells subject to changeable parameters (either from cell to cell or with time during cellular activity), a system dominated by two noninactivating conductances can exhibit varied oscillatory and bistable behavior. See paper for details.",
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- "timestamp_created": "2024-01-11 13:52:18.711891+00:00",
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- "name": "Minimal cell model (Av-Ron et al 1991)",
- "repository_type": "github",
- "summary": "The minimal cell model (MCM) is a reduced Hodgkin-Huxley model that can\r\nexhibit excitable and oscillatory behavior. It consists of two\r\nordinary differential equations, dV/dt for membrane voltage and dW/dt\r\nfor potassium activation and sodium inactivation. The MCM has a stable\r\nmembrane potential of -60mV. With constant input current of 10uA/cm2, it\r\nexhibits oscillations of 150Hz. It is based on the work by FitzHugh and\r\nRinzel.",
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- "id": 736,
- "tag": "Action Potentials"
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- "id": 584,
- "tag": "I Potassium"
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- "timestamp_created": "2024-01-11 13:52:19.222590+00:00",
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- "name": "Multiple modes of a conditional neural oscillator (Epstein, Marder 1990)",
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- "summary": "We present a model for a conditional bursting neuron consisting of five conductances: Hodgkin-Huxley type time- and voltage-dependent Na+ and K+ conductances, a calcium activated voltage-dependent K+ conductance, a calcium-inhibited time- and voltage-dependent Ca++ conductance, and a leakage Cl- conductance.\r\nDifferent bursting and silent modes and transitions between them are analyzed in the model and compared to bursting modes in experiment. See the paper for details.",
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- "tag": "Bursting"
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- "id": 583,
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- "timestamp_created": "2024-01-11 13:52:19.719991+00:00",
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- "id": 542,
- "name": "Spike propagation and bouton activation in terminal arborizations (Luscher, Shiner 1990)",
- "repository_type": "github",
- "summary": "Action potential propagation in axons with bifurcations involving short collaterals with synaptic boutons has been simulated ... The architecture of the terminal arborizations has a profound effect on the activation pattern of synapses, suggesting that terminal arborizations not only distribute neural information to postsynaptic cells but may also be able to process neural information presynaptically. Please see paper for details.",
- "tags": [
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- "id": 727,
- "tag": "Action Potential Initiation"
- },
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- "id": 736,
- "tag": "Action Potentials"
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- "id": 728,
- "tag": "Axonal Action Potentials"
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- "tag": "Detailed Neuronal Models"
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- "id": 576,
- "tag": "I K"
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- "id": 574,
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- "timestamp_created": "2024-01-11 13:52:20.209469+00:00",
- "timestamp_updated": "---",
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- "id": 543,
- "name": "Bursting activity of neuron R15 in Aplysia (Canavier et al 1991, Butera et al 1995)",
- "repository_type": "github",
- "summary": "An equivalent circuit model of the R15 bursting neuron in Aplysia has been combined with a fluid compartment model, resulting in a model that incorporates descriptions of most of the membrane ion channels that are known to exist in the somata of R15, as well as providing a Ca2+ balance on the cell. ... (from the second paper) we have implemented proposed mechanisms for the modulation of two ionic currents (IR and ISI) that play key roles in regulating its spontaneous electrical activity. The model was sufficient to simulate a wide range of endogenous activity in the presence of various concentrations of 5-HT or DA. See papers for more and details.",
- "tags": [
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- "id": 566,
- "tag": "Bursting"
- },
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- "id": 583,
- "tag": "I Calcium"
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- "id": 576,
- "tag": "I K"
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- "id": 574,
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- "id": 564,
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- "id": 585,
- "tag": "Oscillations"
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- "id": 757,
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- "id": 1014,
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- "timestamp_created": "2024-01-11 13:52:20.703660+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/42323",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "id": 544,
- "name": "Olfactory bulb mitral cell: synchronization by gap junctions (Migliore et al 2005)",
- "repository_type": "github",
- "summary": "In a realistic model of two electrically connected mitral cells,\r\nthe paper shows that the somatically-measured experimental properties\r\nof Gap Junctions (GJs) may correspond to a variety of different local coupling strengths\r\nand dendritic distributions of GJs in the tuft. The model suggests\r\nthat the propagation of the GJ-induced local tuft depolarization\r\nis a major mechanim for intraglomerular synchronization of mitral cells.",
- "tags": [
- {
- "id": 579,
- "tag": "Active Dendrites"
- },
- {
- "id": 565,
- "tag": "Dendritic Action Potentials"
- },
- {
- "id": 590,
- "tag": "I A"
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- "id": 576,
- "tag": "I K"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 570,
- "tag": "Influence of Dendritic Geometry"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 588,
- "tag": "Olfaction"
- },
- {
- "id": 586,
- "tag": "Synchronization"
- },
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- "id": 1015,
- "tag": "ModelDB:43039"
- }
- ],
- "timestamp_created": "2024-01-11 13:52:21.457269+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/43039",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "545": {
- "auto_sync": true,
- "content_types": "modeling",
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- "modeling"
- ],
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- "id": 545,
- "name": "CA1 pyramidal neuron: dendritic spike initiation (Gasparini et al 2004)",
- "repository_type": "github",
- "summary": "NEURON mod files from the paper:\r\nSonia Gasparini, Michele Migliore, and Jeffrey C. Magee\r\nOn the initiation and propagation of dendritic spikes in CA1 pyramidal neurons,\r\nJ. Neurosci., J. Neurosci. 24:11046-11056 (2004).",
- "tags": [
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- "id": 727,
- "tag": "Action Potential Initiation"
- },
- {
- "id": 736,
- "tag": "Action Potentials"
- },
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- "id": 579,
- "tag": "Active Dendrites"
- },
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- "id": 595,
- "tag": "Coincidence Detection"
- },
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- "id": 565,
- "tag": "Dendritic Action Potentials"
- },
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- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 574,
- "tag": "I Na,t"
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- "id": 594,
- "tag": "I h"
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- {
- "id": 564,
- "tag": "ModelDB"
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- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 1016,
- "tag": "ModelDB:44050"
- }
- ],
- "timestamp_created": "2024-01-11 13:52:21.970453+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/44050",
- "user": {
- "email": "info@opensourcebrain.org",
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- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "546": {
- "auto_sync": true,
- "content_types": "modeling",
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- "modeling"
- ],
- "default_context": "master",
- "id": 546,
- "name": "Sympathetic neuron (Wheeler et al 2004)",
- "repository_type": "github",
- "summary": "This study shows how synaptic convergence and plasticity can interact to generate synaptic gain in autonomic ganglia and thereby enhance homeostatic control. Using a conductance-based computational model of an idealized sympathetic neuron, we simulated the postganglionic response to noisy patterns of presynaptic activity and found that a threefold amplification in postsynaptic spike output can arise in ganglia, depending on the number and strength of nicotinic synapses, the presynaptic firing rate, the extent of presynaptic facilitation, and the expression of muscarinic and peptidergic excitation. See references for details.",
- "tags": [
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 766,
- "tag": "I CNG"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 580,
- "tag": "I M"
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- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 655,
- "tag": "MATLAB"
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- "id": 767,
- "tag": "MATLAB (web link to model)"
- },
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- "id": 564,
- "tag": "ModelDB"
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- "id": 768,
- "tag": "Synaptic Convergence"
- },
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- "id": 1017,
- "tag": "ModelDB:44972"
- }
- ],
- "timestamp_created": "2024-01-11 13:52:22.474516+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/44972",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "modeling"
- ],
- "default_context": "master",
- "id": 547,
- "name": "The activity phase of postsynaptic neurons (Bose et al 2004)",
- "repository_type": "github",
- "summary": "We show, in a simplified network consisting of an oscillator \r\ninhibiting a follower neuron, how the interaction between synaptic depression\r\nand a transient potassium current in the follower neuron determines the \r\nactivity phase of this neuron. We derive a mathematical expression to \r\ndetermine at what phase of the oscillation the follower neuron becomes \r\nactive. This expression can be used to understand which parameters determine\r\nthe phase of activity of the follower as the frequency of the oscillator is \r\nchanged. See paper for more.",
- "tags": [
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 566,
- "tag": "Bursting"
- },
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- "id": 590,
- "tag": "I A"
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- "id": 655,
- "tag": "MATLAB"
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- "id": 564,
- "tag": "ModelDB"
- },
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- "id": 585,
- "tag": "Oscillations"
- },
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- "id": 569,
- "tag": "Simplified Models"
- },
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- "id": 720,
- "tag": "Temporal Pattern Generation"
- },
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- "id": 759,
- "tag": "XPPAUT"
- },
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- "id": 1018,
- "tag": "ModelDB:45513"
- }
- ],
- "timestamp_created": "2024-01-11 13:52:22.957206+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/45513",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "548": {
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- "id": 548,
- "name": "Large cortex model with map-based neurons (Rulkov et al 2004)",
- "repository_type": "github",
- "summary": "We develop a new computationally efficient approach for the analysis of complex large-scale neurobiological networks. Its key element is the use of a new phenomenological model of a neuron capable of replicating important spike pattern characteristics and designed in the form of a system of difference equations (a map). ... Interconnected with synaptic currents these model neurons demonstrated responses very similar to those found with Hodgkin-Huxley models and in experiments. We illustrate the efficacy of this approach in simulations of one- and two-dimensional cortical network models consisting of regular spiking neurons and fast spiking interneurons to model sleep and activated states of the thalamocortical system. See paper for more.",
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- "id": 578,
- "tag": "Activity Patterns"
- },
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- "id": 755,
- "tag": "C or Cplusplus program"
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- "id": 564,
- "tag": "ModelDB"
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- {
- "id": 585,
- "tag": "Oscillations"
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- "id": 569,
- "tag": "Simplified Models"
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- "id": 592,
- "tag": "Sleep"
- },
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- "id": 587,
- "tag": "Spatio-temporal Activity Patterns"
- },
- {
- "id": 1019,
- "tag": "ModelDB:45525"
- }
- ],
- "timestamp_created": "2024-01-11 13:52:23.462327+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/45525",
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- "first_name": "OSB",
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- "last_name": "Admin",
- "username": "osbadmin"
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- "549": {
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- "id": 549,
- "name": "A single column thalamocortical network model (Traub et al 2005)",
- "repository_type": "github",
- "summary": "To better understand population phenomena in thalamocortical neuronal ensembles,\r\nwe have constructed a preliminary network model with 3,560 multicompartment neurons\r\n(containing soma, branching dendrites, and a portion of axon). Types of neurons included\r\nsuperficial pyramids (with regular spiking [RS] and fast rhythmic bursting [FRB] firing\r\nbehaviors); RS spiny stellates; fast spiking (FS) interneurons, with basket-type and axoaxonic\r\ntypes of connectivity, and located in superficial and deep cortical layers; low threshold spiking\r\n(LTS) interneurons, that contacted principal cell dendrites; deep pyramids, that could have RS or\r\nintrinsic bursting (IB) firing behaviors, and endowed either with non-tufted apical dendrites or\r\nwith long tufted apical dendrites; thalamocortical relay (TCR) cells; and nucleus reticularis\r\n(nRT) cells. To the extent possible, both electrophysiology and synaptic connectivity were\r\nbased on published data, although many arbitrary choices were necessary.",
- "tags": [
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
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- "id": 566,
- "tag": "Bursting"
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- {
- "id": 469,
- "tag": "Epilepsy"
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- "id": 710,
- "tag": "FORTRAN"
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- {
- "id": 590,
- "tag": "I A"
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- {
- "id": 730,
- "tag": "I A, slow"
- },
- {
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- "timestamp_created": "2024-01-11 13:52:24.073934+00:00",
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- "summary": "In this study we report theta-frequency (3-12 Hz)\r\nbursting and resonance in rat cerebellar granule cells and show that these neurons express a previously unidentified slow repolarizing K1 current (IK-slow ). Our experimental and modeling results indicate that IK-slow was necessary for both bursting and resonance. See paper for more.",
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- "id": 566,
- "tag": "Bursting"
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- "timestamp_created": "2024-01-11 13:52:24.576307+00:00",
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- "name": "Cerebellar Purkinje Cell: resurgent Na current and high frequency firing (Khaliq et al 2003)",
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- "summary": "These mod files supplied by Dr Raman are for the below two references. ... we modeled action potential firing by simulating eight currents directly recorded from Purkinje cells in both wild-type and (mutant) med mice.\r\nRegular, high-frequency firing was slowed in med Purkinje neurons. In addition to disrupted sodium currents, med neurons had small\r\nbut significant changes in potassium and leak currents. Simulations indicated that these modified non-sodium currents could not\r\naccount for the reduced excitability of med cells but instead slightly facilitated spiking. The loss of NaV1.6-specific kinetics, however,\r\nslowed simulated spontaneous activity. Together, the data suggest that across a range of conditions, sodium currents with a resurgent\r\ncomponent promote and accelerate firing. See papers for more and details.",
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- "id": 736,
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- "timestamp_created": "2024-01-11 13:52:25.082227+00:00",
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- "name": "Pyramidal neurons: IKHT offsets activation of IKLT to increase gain (Fernandez et al 2005)",
- "repository_type": "github",
- "summary": "This matlab model was supplied by Dr Fernandez. It provides the model specification for the below paper. The influence of a high threshold K current on low threshold K and Na currents (especially frequency-current relationships) are studied in the paper with both experiments and modeling. Please see the reference for more and details.",
- "tags": [
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- "id": 578,
- "tag": "Activity Patterns"
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- "id": 576,
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- "id": 574,
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- "id": 584,
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- "id": 769,
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- "timestamp_created": "2024-01-11 13:52:25.570040+00:00",
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- "name": "Spike timing detection in different forms of LTD (Doi et al 2005)",
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- "summary": "To understand the spike-timing detection mechanisms in cerebellar long-term depression (LTD), we developed a kinetic model of Ca dynamics within a Purkinje dendritic spine. In our kinetic simulation, IP3 was first produced via the metabotropic pathway of parallel fiber (PF) inputs, and the Ca influx in response to the climbing fiber (CF) input triggered regenerative Ca-induced Ca release from the internal stores via the IP3\r\nreceptors activated by the increased IP3. The delay in IP3 increase caused by the PF metabotropic pathway generated the optimal PF\u2013CF\r\ninterval. The Ca dynamics revealed a threshold for large Ca2 release that decreased as IP3 increased, and it coherently explained the\r\ndifferent forms of LTD. See paper for more and details.",
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- "id": 572,
- "tag": "Calcium dynamics"
- },
- {
- "id": 595,
- "tag": "Coincidence Detection"
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- "id": 722,
- "tag": "Depression"
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- "id": 750,
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- "id": 583,
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- "timestamp_created": "2024-01-11 13:52:26.085058+00:00",
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- "id": 554,
- "name": "Kinetic NMDA receptor model (Kampa et al 2004)",
- "repository_type": "github",
- "summary": "This kinetic NMDA receptor model is based on voltage-clamp recordings of NMDA receptor-mediated currents in nucleated patches of rat neocortical layer 5 pyramidal neurons (Kampa et al 2004 J Physiol), this model was fit with AxoGraph directly to experimental recordings in order to obtain the optimal values for the parameters. The demo shows the behaviour of a kinetic NMDA receptor model reproducing the data in figure 2.\r\nThe NMDA receptor model uses realistic rates of magnesium block and its effects on channel desensitisation. Presynaptic transmitter release is necessary for glutamate binding to the receptor. This model was written by Bjoern Kampa, Canberra, 2004.",
- "tags": [
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- "id": 567,
- "tag": "Ion Channel Kinetics"
- },
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- "id": 749,
- "tag": "Long-term Synaptic Plasticity"
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- "timestamp_created": "2024-01-11 13:52:26.594001+00:00",
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- "id": 555,
- "name": "Olfactory bulb granule cell: effects of odor deprivation (Saghatelyan et al 2005)",
- "repository_type": "github",
- "summary": "The model supports the experimental findings on the effects of postnatal odor deprivation, and shows that a -10mV shift in the\r\nNa activation or a reduction in the dendritic length of newborn GC\r\ncould independently explain the observed increase in excitability. \r\n",
- "tags": [
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- "id": 727,
- "tag": "Action Potential Initiation"
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- "id": 736,
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- "id": 576,
- "tag": "I K"
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- "id": 574,
- "tag": "I Na,t"
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- "id": 570,
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- "timestamp_created": "2024-01-11 13:52:27.084354+00:00",
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- "name": "Spontaneous firing caused by stochastic channel gating (Chow, White 1996)",
- "repository_type": "github",
- "summary": "NEURON implementation of model of stochastic channel gating, resulting in spontaneous firing. Qualitatively reproduces the phenomena described in \r\nthe reference.",
- "tags": [
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- "id": 727,
- "tag": "Action Potential Initiation"
- },
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- "id": 736,
- "tag": "Action Potentials"
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- "id": 578,
- "tag": "Activity Patterns"
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- "id": 728,
- "tag": "Axonal Action Potentials"
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- "id": 576,
- "tag": "I K"
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- "id": 582,
- "tag": "I Sodium"
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- "id": 567,
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- "id": 1027,
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- "timestamp_created": "2024-01-11 13:52:27.647805+00:00",
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- "id": 557,
- "name": "Fast oscillations in inhibitory networks (Maex, De Schutter 2003)",
- "repository_type": "github",
- "summary": "We observed a new phenomenon of resonant synchronization in computer-simulated networks of inhibitory neurons in which the synaptic current has a delayed onset, reflecting finite spike propagation and synaptic transmission times. At the resonant level of network excitation, all neurons fire synchronously and rhythmically with a period approximately four times the mean delay of the onset of the inhibitory synaptic current. ... By varying the axonal delay of the inhibitory connections, networks with a realistic synaptic kinetics can be tuned to frequencies from 40 to >200 Hz. ... We conclude that the delay of the synaptic current is the primary parameter controlling the oscillation frequency of inhibitory networks and propose that delay-induced synchronization is a mechanism for fast brain rhythms that depend on intact inhibitory synaptic transmission.",
- "tags": [
- {
- "id": 750,
- "tag": "GENESIS (web link to model)"
- },
- {
- "id": 590,
- "tag": "I A"
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- "id": 576,
- "tag": "I K"
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- "id": 581,
- "tag": "I K,Ca"
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- "id": 589,
- "tag": "I L high threshold"
- },
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- "id": 574,
- "tag": "I Na,t"
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- "id": 594,
- "tag": "I h"
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- "id": 564,
- "tag": "ModelDB"
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- "id": 585,
- "tag": "Oscillations"
- },
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- "id": 569,
- "tag": "Simplified Models"
- },
- {
- "id": 586,
- "tag": "Synchronization"
- },
- {
- "id": 1028,
- "tag": "ModelDB:50392"
- }
- ],
- "timestamp_created": "2024-01-11 13:52:28.246718+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/50392",
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- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
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- "id": 558,
- "name": "Neural model of two-interval discrimination (Machens et al 2005)",
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- "summary": "Two-interval discrimination involves comparison of two stimuli that are presented at different times. It has three phases: loading, in which the first stimulus is perceived and stored in working memory; maintenance of working memory; decision making, in which the second stimulus is perceived and compared with the first. In behaving monkeys, each phase is associated with characteristic firing activity of neurons in the prefrontal cortex. This model implements both working memory and decision making with a mutual inhibition network that reproduces all three phases of two-interval discrimination.\r\nMachens, C.K., Romo, R., and Brody, C.D.\r\nFlexible control of mutual inhibition: a neural model of two-interval discrimination.\r\nScience 307:1121-1124, 2005.",
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- "id": 771,
- "tag": "Action Selection/Decision Making"
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- "id": 559,
- "name": "Ribbon Synapse (Sikora et al 2005)",
- "repository_type": "github",
- "summary": "A model of the ribbon synapse was developed to replicate both pre- and postsynaptic functions of this glutamatergic juncture. The presynaptic portion of the model is rich in anatomical and physiological detail and includes multiple release sites for each ribbon based on anatomical studies of presynaptic terminals, presynaptic voltage at the terminal, the activation of voltage-gated calcium channels and a calcium-dependent release mechanism whose rate varies as a function of the calcium concentration that is monitored at two different sites which control both an ultrafast, docked pool of vesicles and a release ready pool of tethered vesicles. See paper for more and details.",
- "tags": [
- {
- "id": 572,
- "tag": "Calcium dynamics"
- },
- {
- "id": 589,
- "tag": "I L high threshold"
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- "id": 763,
- "tag": "Intrinsic plasticity"
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- "id": 577,
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- "id": 1030,
- "tag": "ModelDB:50997"
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- "timestamp_created": "2024-01-11 13:52:29.357282+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/50997",
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- "email": "info@opensourcebrain.org",
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- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
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- "560": {
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- "modeling"
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- "default_context": "master",
- "id": 560,
- "name": "Dorsal root ganglion (DRG) neuronal model (Amir, Devor 2003)",
- "repository_type": "github",
- "summary": "The model shows that an electrically excitable soma is not necessary for spike through-conduction in the t-shaped geometry of a dorsal root ganglion neuron axon. Electrical excitability of the soma is required, however, for soma spike invasion. See papers for details and more.",
- "tags": [
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- "id": 736,
- "tag": "Action Potentials"
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- {
- "id": 578,
- "tag": "Activity Patterns"
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- "id": 728,
- "tag": "Axonal Action Potentials"
- },
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- "id": 571,
- "tag": "Detailed Neuronal Models"
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- "id": 576,
- "tag": "I K"
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- "id": 574,
- "tag": "I Na,t"
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- {
- "id": 564,
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- "id": 577,
- "tag": "NEURON"
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- {
- "id": 1031,
- "tag": "ModelDB:51022"
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- "timestamp_created": "2024-01-11 13:52:29.851928+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/51022",
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- "id": 561,
- "name": "LTP in cerebellar mossy fiber-granule cell synapses (Saftenku 2002)",
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- "summary": "We simulated synaptic transmission and modified a simple model of long-term potentiation (LTP) and long-term depression (LTD) in order to describe long-term plasticity related changes in cerebellar mossy fiber-granule cell synapses. In our model, protein autophosphorylation, leading to the maintenance of long-term plasticity, is controlled by Ca2+ entry through the NMDA receptor channels. The observed nonlinearity in the development of long-term changes of EPSP in granule cells is explained by the difference in the rate constants of two independent autocatalytic processes.\r\n",
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- {
- "id": 749,
- "tag": "Long-term Synaptic Plasticity"
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- "timestamp_created": "2024-01-11 13:52:30.538387+00:00",
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- "summary": "Mossy cell loss and mossy fiber sprouting are two characteristic \r\n\r\nconsequences of repeated seizures and head trauma. However, their \r\n\r\nprecise contributions to the hyperexcitable state are not well \r\n\r\nunderstood. Because it is difficult, and frequently impossible, to \r\n\r\nindependently examine using experimental techniques whether it is the\r\n\r\nloss of mossy cells or the sprouting of mossy fibers that leads to \r\n\r\ndentate hyperexcitability, we built a biophysically realistic and \r\n\r\nanatomically representative computational model of the dentate gyrus\r\n\r\nto examine this question. The 527-cell model, containing granule, \r\n\r\nmossy, basket, and hilar cells with axonal projections to the \r\n\r\nperforant-path termination zone, showed that even weak mossy fiber \r\n\r\nsprouting (10-15% of the strong sprouting observed in the pilocarpine\r\n\r\nmodel of epilepsy) resulted in the spread of seizure-like activity to\r\n\r\nthe adjacent model hippocampal laminae after focal stimulation of the\r\n\r\nperforant path. See reference for more and details.",
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- "tag": "Activity Patterns"
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- "timestamp_created": "2024-01-11 13:52:31.082059+00:00",
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- "name": "Cortical network model of posttraumatic epileptogenesis (Bush et al 1999)",
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- "summary": "This simulation from Bush, Prince, and Miller 1999 shows the epileptiform response (Fig. 6C) to a brief single stimulation in a 500 cell\r\nnetwork of multicompartment models, some of which have active dendrites. The results which I obtained under Redhat Linux is shown in result.gif.\r\n\r\nOriginal 1997 code from Paul Bush modified slightly by Bill Lytton to make it work with\r\ncurrent version of NEURON (5.7.139). Thanks to Paul Bush and Ken Miller for\r\nmaking the code available.\r\n",
- "tags": [
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- "id": 579,
- "tag": "Active Dendrites"
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- "id": 571,
- "tag": "Detailed Neuronal Models"
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- "id": 469,
- "tag": "Epilepsy"
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- "id": 574,
- "tag": "I Na,t"
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- "timestamp_created": "2024-01-11 13:52:31.629225+00:00",
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- "name": "Motoneuron simulations for counting motor units (Major and Jones 2005)",
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- "summary": "Simulations of clinical methods to count the number of motoneurons/motor units in human patients. Models include stimulation of motor axons or voluntary activation and responses are measured as muscle tension or EMG.",
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- "timestamp_created": "2024-01-11 13:52:32.108878+00:00",
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- "name": "Paired turbulence and light effect on calcium increase in Hermissenda (Blackwell 2004)",
- "repository_type": "github",
- "summary": "The sea slug Hermissenda learns to associate light and hair cell stimulation, but not when the stimuli are temporally uncorrelated...These issues were addressed using a multi-compartmental computer model of phototransduction, calcium dynamics, and ionic currents of the Hermissenda photoreceptor...simulations show that a potassium leak channel, which closes with an increase in calcium, is required to produce both the untrained LLD and the enhanced LLD due to the decrease in voltage dependent potassium currents.",
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- "id": 572,
- "tag": "Calcium dynamics"
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- "id": 774,
- "tag": "Chemesis"
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- "id": 590,
- "tag": "I A"
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- "id": 583,
- "tag": "I Calcium"
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- "id": 581,
- "tag": "I K,Ca"
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- "id": 591,
- "tag": "I K,leak"
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- "id": 584,
- "tag": "I Potassium"
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- "tag": "I Sodium"
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- "tag": "I h"
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- "tag": "Invertebrate"
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- "id": 564,
- "tag": "ModelDB"
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- "id": 751,
- "tag": "Signaling pathways"
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- "id": 720,
- "tag": "Temporal Pattern Generation"
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- "id": 1036,
- "tag": "ModelDB:53427"
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- "timestamp_created": "2024-01-11 13:52:32.579173+00:00",
- "timestamp_updated": "---",
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- "id": 566,
- "name": "Compartmental model of a mitral cell (Popovic et al. 2005)",
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- "summary": "Usage of a morphologically realistic compartmental model of a mitral cell and data obtained from whole-cell patch-clamp and voltage-imaging experiments in order to explore passive parameter space in which reported low EPSP attenuation is observed.",
- "tags": [
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- "id": 727,
- "tag": "Action Potential Initiation"
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- "id": 591,
- "tag": "I K,leak"
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- "id": 564,
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- "tag": "Olfaction"
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- "tag": "ModelDB:53435"
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- "timestamp_created": "2024-01-11 13:52:33.097179+00:00",
- "timestamp_updated": "---",
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- "567": {
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- "default_context": "master",
- "id": 567,
- "name": "Discrete event simulation in the NEURON environment (Hines and Carnevale 2004)",
- "repository_type": "github",
- "summary": "A short introduction to how \"integrate and fire\" cells are implemented in NEURON. Network simulations that use only artificial spiking cells are extremely efficient, with runtimes proportional to the total number of synaptic inputs received and independent of the number of cells or problem time.",
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- "tag": "Methods"
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- "tag": "Tutorial/Teaching"
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- "id": 1038,
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- "timestamp_created": "2024-01-11 13:52:33.585022+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/53437",
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- "568": {
- "auto_sync": true,
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- "id": 568,
- "name": "Spatial gridding and temporal accuracy in NEURON (Hines and Carnevale 2001)",
- "repository_type": "github",
- "summary": "A heuristic for compartmentalization based on\r\nthe space constant at 100 Hz is proposed.\r\nThe paper also discusses spatio/temporal accuracy\r\nand the use of CVODE.",
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- "id": 756,
- "tag": "Methods"
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- "timestamp_created": "2024-01-11 13:52:34.059050+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/53451",
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- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
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- "id": 569,
- "name": "Method of probabilistic principle surfaces (PPS) (Chang and Ghosh 2001)",
- "repository_type": "github",
- "summary": "Principal curves and surfaces are nonlinear generalizations of principal\r\ncomponents and subspaces, respectively. They can provide insightful summary\r\nof high-dimensional data not typically attainable by classical linear\r\nmethods. See paper for more and details. The matlab code supplied at the authors website calculates probabilistic principle surfaces on benchmark data sets.",
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- "id": 767,
- "tag": "MATLAB (web link to model)"
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- "id": 756,
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- "id": 564,
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- "timestamp_created": "2024-01-11 13:52:34.517350+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/53457",
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- "id": 570,
- "name": "S cell network (Moss et al 2005)",
- "repository_type": "github",
- "summary": "Excerpts from the abstract:\r\nS cells form a chain of electrically coupled neurons that extends the length of the leech CNS and plays a critical role in sensitization during whole-body shortening. ...\r\nSerotonin ... increasedAP latency across the electrical synapse, suggesting that serotonin reduced coupling between S cells. ...\r\nSerotonin modulated \r\ninstantaneous AP frequency when APs were initiated in separate S \r\ncells and in a computational model of S cell activity following \r\nmechanosensory input. Thus, serotonergic modulation of S cell \r\nelectrical synapses may contribute to changes in the pattern of\r\nactivity in the S cell network. See paper for more.",
- "tags": [
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- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 584,
- "tag": "I Potassium"
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- "id": 582,
- "tag": "I Sodium"
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- "id": 729,
- "tag": "Invertebrate"
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- "id": 564,
- "tag": "ModelDB"
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- "id": 757,
- "tag": "SNNAP"
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- "id": 1041,
- "tag": "ModelDB:53559"
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- "timestamp_created": "2024-01-11 13:52:34.992390+00:00",
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- "uri": "https://github.com/OpenSourceBrain/53559",
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- "571": {
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- "id": 571,
- "name": "Tonic neuron in spinal lamina I: prolongation of subthreshold depol. (Prescott and De Koninck 2005)",
- "repository_type": "github",
- "summary": "Model demonstrates mechanism whereby two kinetically distinct inward currents act synergistically to prolong subthreshold depolarization. The important currents are a persistent Na current (with fast kinetics) and a persistent Ca current (with slower kinetics). Model also includes a slow K current and transient Ca current, in addition to standard HH currents. Model parameters are set to values used in Fig. 8A. Simulation shows prolonged depolarizations in response to two brief stimuli.\r\n",
- "tags": [
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- "id": 727,
- "tag": "Action Potential Initiation"
- },
- {
- "id": 572,
- "tag": "Calcium dynamics"
- },
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- "id": 754,
- "tag": "Delay"
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- "id": 583,
- "tag": "I Calcium"
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- "id": 581,
- "tag": "I K,Ca"
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- "id": 739,
- "tag": "I Na,p"
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- "id": 564,
- "tag": "ModelDB"
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- "id": 577,
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- "id": 775,
- "tag": "Nociception"
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- "id": 1042,
- "tag": "ModelDB:53569"
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- "timestamp_created": "2024-01-11 13:52:35.477471+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/53569",
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- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
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- "default_context": "main",
- "id": 572,
- "name": "Rat phrenic motor neuron (Amini et al 2004)",
- "repository_type": "github",
- "summary": "We have developed a model for the rat phrenic motor neuron (PMN) that robustly replicates many experimentally observed behaviors of PMNs in response to pharmacological, ionic, and electrical perturbations using a single set of parameters.",
- "tags": [
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- "id": 736,
- "tag": "Action Potentials"
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- "id": 776,
- "tag": "C or Cplusplus program (web link to model)"
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- "id": 581,
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- "id": 589,
- "tag": "I L high threshold"
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- "id": 721,
- "tag": "I N"
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- "id": 739,
- "tag": "I Na,p"
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- "id": 574,
- "tag": "I Na,t"
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- "id": 575,
- "tag": "I T low threshold"
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- "id": 567,
- "tag": "Ion Channel Kinetics"
- },
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- "id": 564,
- "tag": "ModelDB"
- },
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- "id": 777,
- "tag": "Spike Frequency Adaptation"
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- "id": 1043,
- "tag": "ModelDB:53572"
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- "timestamp_created": "2024-01-11 13:52:35.964480+00:00",
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- "name": "A model for interaural time difference sensitivity in the medial superior olive (Zhou et al 2005)",
- "repository_type": "github",
- "summary": "This model simulates responses of neurons to interaural time difference (ITD) in the medial superior olive (MSO) of the mammalian brainstem. The model has a bipolar cell structure and incorporates two anatomic observations in the MSO: (1) the axon arises from the dendrite that receives ipsilateral inputs and (2) inhibitory synapses are located primarily on the soma in adult animals. Fine adjustment of the best ITD is achieved by the interplay of somatic sodium currents and synaptic inhibitory currents. The model suggests a mechanism for dynamically \"fine-tuning\" the ITD sensitivity of MSO cells by the opponency between depolarizing sodium currents and hyperpolarizing inhibitory currents.",
- "tags": [
- {
- "id": 728,
- "tag": "Axonal Action Potentials"
- },
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- "id": 595,
- "tag": "Coincidence Detection"
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- "id": 584,
- "tag": "I Potassium"
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- "id": 582,
- "tag": "I Sodium"
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- "timestamp_created": "2024-01-11 13:52:36.480839+00:00",
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- "id": 574,
- "name": "Medial vestibular neuron models (Quadroni and Knopfel 1994)",
- "repository_type": "github",
- "summary": "The structure and the parameters of the model cells were chosen to reproduce the responses of type A and type B MVNns as described in electrophysiological recordings. The emergence of oscillatory firing under these two specific experimental conditions is consistent with electrophysiological recordings not used during construction of the model. We, therefore, suggest that these models have a high predictive value.",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 572,
- "tag": "Calcium dynamics"
- },
- {
- "id": 590,
- "tag": "I A"
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- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 589,
- "tag": "I L high threshold"
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- "id": 739,
- "tag": "I Na,p"
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- "id": 574,
- "tag": "I Na,t"
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- "id": 575,
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- "id": 1045,
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- "timestamp_created": "2024-01-11 13:52:36.976861+00:00",
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- "id": 575,
- "name": "T-type Ca current in thalamic neurons (Wang et al 1991)",
- "repository_type": "github",
- "summary": "A model of the transient, low-threshold voltage-dependent (T-type)\r\nCa2+ current is constructed using whole-cell voltage-clamp \r\ndata from enzymatically isolated rat thalamocortical relay neurons. \r\nThe T-type Ca2+ current is described according to the Hodgkin-Huxley \r\nscheme, using the m3h format, with rate constants determined from the experimental data.",
- "tags": [
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- "id": 578,
- "tag": "Activity Patterns"
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- "id": 575,
- "tag": "I T low threshold"
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- "id": 567,
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- "id": 1046,
- "tag": "ModelDB:53893"
- }
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- "timestamp_created": "2024-01-11 13:52:37.476012+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/53893",
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- "id": 576,
- "name": "C elegans pharynx simulation (Avery and Shtonda 2003)",
- "repository_type": "github",
- "summary": "Experimental obervations, measurements, and theoretical analysis of C. elegans pharynx feeding behavior function are reported in the paper. See the paper and the model files for more.",
- "tags": [
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- "id": 729,
- "tag": "Invertebrate"
- },
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- "id": 778,
- "tag": "Java"
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- "id": 564,
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- "id": 1047,
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- }
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- "timestamp_created": "2024-01-11 13:52:37.983503+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/53894",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "modeling"
- ],
- "default_context": "master",
- "id": 577,
- "name": "T channel currents (Vitko et al 2005)",
- "repository_type": "github",
- "summary": "Computer simulations predict that seven of the SNPs would increase firing of neurons, with three of them inducing oscillations at similar frequencises. 3 representative models from the paper have been submited: a wild-type (WT) recombinant Cav3.2 T-channel, and two of the\r\nmutants described in the Vitko et al., 2005 paper (C456S and R788C). See the paper for more and details.\r\n",
- "tags": [
- {
- "id": 469,
- "tag": "Epilepsy"
- },
- {
- "id": 575,
- "tag": "I T low threshold"
- },
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- "id": 567,
- "tag": "Ion Channel Kinetics"
- },
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- "id": 564,
- "tag": "ModelDB"
- },
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- "id": 577,
- "tag": "NEURON"
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- "id": 1048,
- "tag": "ModelDB:53965"
- }
- ],
- "timestamp_created": "2024-01-11 13:52:38.484489+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/53965",
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- "email": "info@opensourcebrain.org",
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- "578": {
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- "modeling"
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- "default_context": "master",
- "id": 578,
- "name": "NEUROFIT: fitting HH models to voltage clamp data (Willms 2002)",
- "repository_type": "github",
- "summary": "Publicly available software for accurate fitting of Hodgkin-Huxley models to voltage-clamp data... The set of parameter values for the model determined by this software yield current traces that are substantially closer to the observed data than those determined from the usual fitting method. This improvement is due to the fact that the software fits all of the parameters simultaneously utilizing all of the data rather than fitting steady-state and time constant parameters disjointly using peak currents and portions of the rising and falling phases... The software also incorporates a linear pre-estimation procedure to help in determining reasonable initial values for the full non-linear algorithm. See references for details and more.",
- "tags": [
- {
- "id": 776,
- "tag": "C or Cplusplus program (web link to model)"
- },
- {
- "id": 710,
- "tag": "FORTRAN"
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- "id": 756,
- "tag": "Methods"
- },
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- "id": 564,
- "tag": "ModelDB"
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- "id": 568,
- "tag": "Parameter Fitting"
- },
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- "id": 1049,
- "tag": "ModelDB:54141"
- }
- ],
- "timestamp_created": "2024-01-11 13:52:38.970393+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/54141",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "id": 579,
- "name": "Channel parameter estimation from current clamp and neuronal properties (Toth, Crunelli 2001)",
- "repository_type": "github",
- "summary": "In this paper, we present a method by which the activation and kinetic properties of INa, IK can be estimated from current-clamp data, more precisely from the time course of the action potential, provided some additional electrophysiological properties of the neurone are a priori known. See reference for details and more.",
- "tags": [
- {
- "id": 567,
- "tag": "Ion Channel Kinetics"
- },
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- "id": 756,
- "tag": "Methods"
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- "id": 564,
- "tag": "ModelDB"
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- {
- "id": 779,
- "tag": "Octave"
- },
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- "id": 1050,
- "tag": "ModelDB:54154"
- }
- ],
- "timestamp_created": "2024-01-11 13:52:39.464749+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/54154",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
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- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "580": {
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- "modeling"
- ],
- "default_context": "master",
- "id": 580,
- "name": "Olfactory receptor neuron model (Dougherty et al 2005)",
- "repository_type": "github",
- "summary": "Demonstration of ORN model by Dougherty, Wright and Yew (2005) PNAS 102: 10415-10420. This program, dwy_pnas_demo2, simulates the transduction current response of a single olfactory receptor neuron being stimulated by an odorant plume. The program is interactive in that a user can tweak parameter values and stimulus conditions. Also, users can save a configuration in a mat-file or export all aspects to a directory of text files. These text files can be read by other programs. There is also an import facility for importing text files from a directory that allows the user to specify their own data, pulses and parameters.",
- "tags": [
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 766,
- "tag": "I CNG"
- },
- {
- "id": 780,
- "tag": "I Cl,Ca"
- },
- {
- "id": 591,
- "tag": "I K,leak"
- },
- {
- "id": 567,
- "tag": "Ion Channel Kinetics"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
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- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 588,
- "tag": "Olfaction"
- },
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- "id": 585,
- "tag": "Oscillations"
- },
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- "id": 568,
- "tag": "Parameter Fitting"
- },
- {
- "id": 569,
- "tag": "Simplified Models"
- },
- {
- "id": 1051,
- "tag": "ModelDB:54896"
- }
- ],
- "timestamp_created": "2024-01-11 13:52:39.962636+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/54896",
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- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "581": {
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- "id": 581,
- "name": "AP initiation and propagation in type II cochlear ganglion cell (Hossain et al 2005)",
- "repository_type": "github",
- "summary": "The model of type II cochlear ganglion cell was based on the\r\nimmunostaining of the mouse auditory pathway. Specific antibodies were\r\nused to map the distribution of voltage-dependent sodium channels along\r\nthe two unmyelinated axon-like processes of the bipolar ganglion cells.\r\nThree distinct hot spots were detected. A high density of sodium\r\nchannels was present over the entire trajectory of sensory endings\r\nbeneath the outer hair cells (the most distal portion of the peripheral\r\naxon). The other two hot spots were localized in the initial segments of\r\nboth of the axons that flank the unmyelinated bipolar ganglion cell bodies.\r\n\r\nA biophysical model indicates that all three hot spots might play\r\nimportant roles in action potential initiation and propagation. For\r\ninstance, the hot spot in the receptor segment is important for\r\ntransforming the receptor potentials into a full blown action potential\r\n(Supplemental Fig. 1). The hot spots in the two paraganglionic axon\r\ninitial segments are there to ensure the successful propagation of\r\naction potentials from the peripheral to the central axon through the\r\ncell body.\r\n\r\nThe Readme.txt file provides step by step instructions on how to\r\nrecreate Figures 6 and 7 of Hossain et al., 2005 paper.",
- "tags": [
- {
- "id": 727,
- "tag": "Action Potential Initiation"
- },
- {
- "id": 762,
- "tag": "Audition"
- },
- {
- "id": 565,
- "tag": "Dendritic Action Potentials"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 580,
- "tag": "I M"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 564,
- "tag": "ModelDB"
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- "id": 577,
- "tag": "NEURON"
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- {
- "id": 1052,
- "tag": "ModelDB:54903"
- }
- ],
- "timestamp_created": "2024-01-11 13:52:40.571287+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/54903",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "582": {
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- "content_types": "modeling",
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- "modeling"
- ],
- "default_context": "master",
- "id": 582,
- "name": "CA1 pyramidal neuron: signal propagation in oblique dendrites (Migliore et al 2005)",
- "repository_type": "github",
- "summary": "NEURON mod files from the paper:\r\nM. Migliore, M. Ferrante, GA Ascoli (2005).\r\nThe model shows how the back- and forward propagation of action potentials in the oblique dendrites of CA1 neurons could be modulated by local properties such as morphology or active conductances.",
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- {
- "id": 727,
- "tag": "Action Potential Initiation"
- },
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 579,
- "tag": "Active Dendrites"
- },
- {
- "id": 565,
- "tag": "Dendritic Action Potentials"
- },
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 570,
- "tag": "Influence of Dendritic Geometry"
- },
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- "tag": "Ion Channel Kinetics"
- },
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- "id": 564,
- "tag": "ModelDB"
- },
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- "id": 577,
- "tag": "NEURON"
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- "id": 773,
- "tag": "neuroConstruct (web link to model)"
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- {
- "id": 1053,
- "tag": "ModelDB:55035"
- }
- ],
- "timestamp_created": "2024-01-11 13:52:41.048146+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/55035",
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- "email": "info@opensourcebrain.org",
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- "last_name": "Admin",
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- "default_context": "main",
- "id": 583,
- "name": "Regulation of KCNQ2/KCNQ3 current by G protein cycling (Suh et al 2004)",
- "repository_type": "github",
- "summary": "Receptor-mediated modulation of KCNQ channels regulates neuronal excitability. This study concerns\r\nthe kinetics and mechanism of M1 muscarinic receptor-mediated regulation of the cloned neuronal M channel, KCNQ2/KCNQ3 (Kv7.2/Kv7.3). ... observations were successfully described by a kinetic model representing biochemical steps of the signaling\r\ncascade using published rate constants where available. The model supports the following sequence of events for\r\nthis Gq-coupled signaling: A classical G-protein cycle, including competition for nucleotide-free G-protein by all\r\nnucleotide forms and an activation step requiring Mg2, followed by G-protein-stimulated phospholipase C and\r\nhydrolysis of PIP2, and finally PIP2 dissociation from binding sites for inositol lipid on the channels so that KCNQ\r\ncurrent was suppressed. See paper for details and more.",
- "tags": [
- {
- "id": 781,
- "tag": "G-protein coupled"
- },
- {
- "id": 580,
- "tag": "I M"
- },
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- "id": 567,
- "tag": "Ion Channel Kinetics"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
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- "id": 751,
- "tag": "Signaling pathways"
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- "id": 782,
- "tag": "Virtual Cell (web link to model)"
- },
- {
- "id": 1054,
- "tag": "ModelDB:55273"
- }
- ],
- "timestamp_created": "2024-01-11 13:52:41.526746+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/55273",
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- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "584": {
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- "content_types": "modeling",
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- "default_context": "main",
- "id": 584,
- "name": "Role of KCNQ1 and IKs in cardiac repolarization (Silva, Rudy 2005)",
- "repository_type": "github",
- "summary": "Detailed Markov models of IKs (the slow delayed rectifier K+ current) and its alpha-subunit KCNQ1 were developed. The model is compared to experiment in the paper. The role of IKs in disease and drug treatments is elucidated (the prevention of excessive action potential prolongation and development of arrhythmogenic early afterdepolarizations). See paper for more and details.",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 737,
- "tag": "Heart disease"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 783,
- "tag": "I_Ks"
- },
- {
- "id": 567,
- "tag": "Ion Channel Kinetics"
- },
- {
- "id": 784,
- "tag": "KCNQ1"
- },
- {
- "id": 785,
- "tag": "Long-QT"
- },
- {
- "id": 767,
- "tag": "MATLAB (web link to model)"
- },
- {
- "id": 748,
- "tag": "Markov-type model"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1055,
- "tag": "ModelDB:55748"
- }
- ],
- "timestamp_created": "2024-01-11 13:52:42.005907+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/55748",
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- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "585": {
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- "modeling"
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- "default_context": "master",
- "id": 585,
- "name": "Breakdown of accmmodation in nerve: a possible role for INAp (Hennings et al 2005)",
- "repository_type": "github",
- "summary": "The present modeling study suggests that persistent, low-threshold, rapidly activating\r\nsodium currents have a key role in breakdown of accommodation, and that breakdown of\r\naccommodation can be used as a tool for studying persistent sodium current under normal and\r\npathological conditions. See paper for more and details.",
- "tags": [
- {
- "id": 727,
- "tag": "Action Potential Initiation"
- },
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 786,
- "tag": "Electrotonus"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 739,
- "tag": "I Na,p"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 787,
- "tag": "Pathophysiology"
- },
- {
- "id": 1056,
- "tag": "ModelDB:55749"
- }
- ],
- "timestamp_created": "2024-01-11 13:52:42.494664+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/55749",
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- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "586": {
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- "content_types": "modeling",
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- "modeling"
- ],
- "default_context": "main",
- "id": 586,
- "name": "A dynamic model of the canine ventricular myocyte (Hund, Rudy 2004)",
- "repository_type": "github",
- "summary": "The Hund-Rudy dynamic (HRd) model is based on data from the canine epicardial ventricular myocyte. Rate-dependent phenomena associated with ion channel kinetics, action potential properties and Ca2+ handling are simulated by the model. See paper for more and details.",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 776,
- "tag": "C or Cplusplus program (web link to model)"
- },
- {
- "id": 737,
- "tag": "Heart disease"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 765,
- "tag": "I Chloride"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 567,
- "tag": "Ion Channel Kinetics"
- },
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- "id": 767,
- "tag": "MATLAB (web link to model)"
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- "id": 564,
- "tag": "ModelDB"
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- {
- "id": 740,
- "tag": "Na/K pump"
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- "id": 741,
- "tag": "Sodium pump"
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- "id": 1057,
- "tag": "ModelDB:55756"
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- "timestamp_created": "2024-01-11 13:52:42.977666+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/55756",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "587": {
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- "default_context": "main",
- "id": 587,
- "name": "Ventricular cell model (Guinea-pig-type) (Luo, Rudy 1991, +11 other papers!) (C++)",
- "repository_type": "github",
- "summary": "A mathematical model of the membrane action potential of the mammalian ventricular cell is introduced. The model is based, whenever possible, on recent single-cell and single-channel data and incorporates the possibility of changing extracellular potassium concentration [K]o. ... The results are consistent with recent experimental observations, and the model simulations relate these phenomena to the underlying ionic channel kinetics. See paper for more and details.",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 776,
- "tag": "C or Cplusplus program (web link to model)"
- },
- {
- "id": 737,
- "tag": "Heart disease"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 591,
- "tag": "I K,leak"
- },
- {
- "id": 589,
- "tag": "I L high threshold"
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- "id": 574,
- "tag": "I Na,t"
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- "id": 783,
- "tag": "I_Ks"
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- "id": 567,
- "tag": "Ion Channel Kinetics"
- },
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- "id": 564,
- "tag": "ModelDB"
- },
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- "id": 1058,
- "tag": "ModelDB:55859"
- }
- ],
- "timestamp_created": "2024-01-11 13:52:43.493930+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/55859",
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- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "588": {
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- "id": 588,
- "name": "Boundary effects influence velocity in transverse propagation of cardiac APs (Sperelakis et al 2005)",
- "repository_type": "github",
- "summary": "... earlier experiments were carried out with 2-dimensional\r\nsheets of cells: 2 \u00c3\u2014 3, 3 \u00c3\u2014 4, and 5 \u00c3\u2014 5 models (where the first number is the number of parallel\r\nchains and the second is the number of cells in each chain). The purpose of the present study was\r\nto enlarge the model size to 7 \u00c3\u2014 7, thus enabling the transverse velocities to be compared in models\r\nof different sizes (where all circuit parameters are identical in all models). This procedure should\r\nenable the significance of the role of edge (boundary) effects in transverse propagation to be\r\ndetermined. See paper for more and details.",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 788,
- "tag": "PSpice"
- },
- {
- "id": 1059,
- "tag": "ModelDB:56012"
- }
- ],
- "timestamp_created": "2024-01-11 13:52:43.989974+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/56012",
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- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "589": {
- "auto_sync": true,
- "content_types": "modeling",
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- "modeling"
- ],
- "default_context": "master",
- "id": 589,
- "name": "Persistent synchronized bursting activity in cortical tissues (Golomb et al 2005)",
- "repository_type": "github",
- "summary": "The program simulates a one-dimensional model of a cortical tissue with excitatory and inhibitory populations.\r\n",
- "tags": [
- {
- "id": 566,
- "tag": "Bursting"
- },
- {
- "id": 755,
- "tag": "C or Cplusplus program"
- },
- {
- "id": 469,
- "tag": "Epilepsy"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 591,
- "tag": "I K,leak"
- },
- {
- "id": 580,
- "tag": "I M"
- },
- {
- "id": 739,
- "tag": "I Na,p"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 586,
- "tag": "Synchronization"
- },
- {
- "id": 1060,
- "tag": "ModelDB:57905"
- }
- ],
- "timestamp_created": "2024-01-11 13:52:44.484760+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/57905",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "590": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 590,
- "name": "HERG K+ channels spike-frequency adaptation (Chiesa et al 1997)",
- "repository_type": "github",
- "summary": "Spike frequency adaptation has contributions from the IHERG current (encoded by the human eag-related gene\r\n(HERG); Warmke & Ganetzky, 1994), which develops with\r\nslow kinetics during depolarization and contributes to the\r\nrepolarization of the long action potentials typically present\r\nin the heart. IHERG is one of the delayed rectifier currents\r\n(IK(r)) of the heart, and HERG mutations are associated\r\nwith one of the cardiac arrhythmia LQT syndromes (LQT2).\r\nSee paper for more and details.\r\n",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 789,
- "tag": "I_HERG"
- },
- {
- "id": 785,
- "tag": "Long-QT"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 777,
- "tag": "Spike Frequency Adaptation"
- },
- {
- "id": 759,
- "tag": "XPPAUT"
- },
- {
- "id": 1061,
- "tag": "ModelDB:57910"
- }
- ],
- "timestamp_created": "2024-01-11 13:52:44.971994+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/57910",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "591": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 591,
- "name": "Consequences of HERG mutations in the long QT syndrome (Clancy, Rudy 2001)",
- "repository_type": "github",
- "summary": "This study demonstrates which mutations can prolong APD sufficiently to generate early \r\nafterdepolarizations (EADs), which may trigger life-threatening arrhythmias. The severity of the phenotype is shown to \r\ndepend on the specific kinetic changes and how they affect I(Kr) during the time course of the action potential. See paper for more and details. \r\n\r\n",
- "tags": [
- {
- "id": 737,
- "tag": "Heart disease"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 789,
- "tag": "I_HERG"
- },
- {
- "id": 567,
- "tag": "Ion Channel Kinetics"
- },
- {
- "id": 785,
- "tag": "Long-QT"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 759,
- "tag": "XPPAUT"
- },
- {
- "id": 1062,
- "tag": "ModelDB:58172"
- }
- ],
- "timestamp_created": "2024-01-11 13:52:45.492560+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/58172",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "592": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 592,
- "name": "Allosteric gating of K channels (Horrigan et al 1999)",
- "repository_type": "github",
- "summary": "Calcium sensitive large-conductance K channel conductance is controlled by both cytoplasmic calcium and membrane potential.\r\nExperimental data obtained by the inside out patch method can be understood in terms of a gating scheme where a central transition between a closed and an open conformation is allosterically regulated by the state of four independent and identical voltage sensors. See paper for more and details.",
- "tags": [
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 567,
- "tag": "Ion Channel Kinetics"
- },
- {
- "id": 756,
- "tag": "Methods"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 759,
- "tag": "XPPAUT"
- },
- {
- "id": 1063,
- "tag": "ModelDB:58195"
- }
- ],
- "timestamp_created": "2024-01-11 13:52:45.961806+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/58195",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "593": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 593,
- "name": "Ca(2+) oscillations based on Ca-induced Ca-release (Dupont et al 1991)",
- "repository_type": "github",
- "summary": "We consider a simple, minimal model for signal-induced Ca2+ oscillations based on Ca(2+)-induced Ca2+ release. The model takes into account the existence of two pools of intracellular Ca2+, namely, one sensitive to inositol 1,4,5 trisphosphate (InsP3) whose synthesis is elicited by the stimulus, and one insensitive to InsP3. See paper for more and details.",
- "tags": [
- {
- "id": 572,
- "tag": "Calcium dynamics"
- },
- {
- "id": 790,
- "tag": "Calcium waves"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 751,
- "tag": "Signaling pathways"
- },
- {
- "id": 569,
- "tag": "Simplified Models"
- },
- {
- "id": 759,
- "tag": "XPPAUT"
- },
- {
- "id": 1064,
- "tag": "ModelDB:58199"
- }
- ],
- "timestamp_created": "2024-01-11 13:52:46.426060+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/58199",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "594": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 594,
- "name": "Role of KCNQ1 and IKs in cardiac repolarization (Silva, Rudy 2005) (XPP)",
- "repository_type": "github",
- "summary": "Detailed Markov model of IKs (the slow delayed rectifier K+ current) is supplied here in XPP. The model is compared to experiment in the paper. The role of IKs in disease and drug treatments is elucidated (the prevention of excessive action potential prolongation and development of arrhythmogenic early afterdepolarizations). See also modeldb accession number 55748 code and reference for more and details. This XPP version of the model reproduces Figure 3C in the paper by default.\r\nThese model files were submitted by: Dr. Sheng-Nan Wu, Han-Dong Chang, Jiun-Shian Wu\r\nDepartment of Physiology\r\nNational Cheng Kung University Medical College\r\n",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 737,
- "tag": "Heart disease"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 783,
- "tag": "I_Ks"
- },
- {
- "id": 567,
- "tag": "Ion Channel Kinetics"
- },
- {
- "id": 784,
- "tag": "KCNQ1"
- },
- {
- "id": 785,
- "tag": "Long-QT"
- },
- {
- "id": 748,
- "tag": "Markov-type model"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 759,
- "tag": "XPPAUT"
- },
- {
- "id": 1065,
- "tag": "ModelDB:58581"
- }
- ],
- "timestamp_created": "2024-01-11 13:52:47.156703+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/58581",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "595": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 595,
- "name": "Coding of stimulus frequency by latency in thalamic networks (Golomb et al 2005)",
- "repository_type": "github",
- "summary": "The paper presents models of the rat vibrissa processing system including the\r\nposterior medial (POm) thalamus, ventroposterior medial (VPm) thalamus, and GABAB-\r\nmediated feedback inhibition from the reticular thalamic (Rt) nucleus.\r\nA clear match between the experimentally measured spike-rates and the\r\nnumerically calculated rates for the full model occurs when VPm thalamus receives stronger\r\nbrainstem input and weaker GABAB-mediated inhibition than POm thalamus.",
- "tags": [
- {
- "id": 755,
- "tag": "C or Cplusplus program"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 791,
- "tag": "Rate-coding model neurons"
- },
- {
- "id": 569,
- "tag": "Simplified Models"
- },
- {
- "id": 1066,
- "tag": "ModelDB:58582"
- }
- ],
- "timestamp_created": "2024-01-11 13:52:47.669002+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/58582",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "596": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 596,
- "name": "Proximal inhibition of Renshaw cells (Bui et al 2005)",
- "repository_type": "github",
- "summary": "Inhibitory synaptic inputs to Renshaw cells are concentrated on the\r\nsoma and the juxtasomatic dendrites. In the present study, we \r\ninvestigated whether this proximal bias leads to more effective \r\ninhibition under different neuronal operating conditions. Using \r\ncompartmental models based on detailed anatomical measurements of \r\nintracellularly stained Renshaw cells, we compared the inhibition \r\nproduced by GABAA synapses when\r\ndistributed with a proximal bias to the inhibition produced when the \r\nsame synapses were distributed uniformly. See paper for more and details.",
- "tags": [
- {
- "id": 727,
- "tag": "Action Potential Initiation"
- },
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 570,
- "tag": "Influence of Dendritic Geometry"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 792,
- "tag": "SABER"
- },
- {
- "id": 1067,
- "tag": "ModelDB:58957"
- }
- ],
- "timestamp_created": "2024-01-11 13:52:48.235988+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/58957",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "597": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 597,
- "name": "IA and IT interact to set first spike latency (Molineux et al 2005)",
- "repository_type": "github",
- "summary": "Using patch clamp and modeling, we illustrate that spike latency characteristics are the product of an interplay between I(A) and low-threshold calcium current (I(T)) that requires a steady-state difference in the inactivation parameters of the currents. Furthermore, we show that the unique first-spike latency characteristics of stellate cells have important implications for the integration of coincident IPSPs and EPSPs, such that inhibition can shift first-spike latency to differentially modulate the probability of firing.",
- "tags": [
- {
- "id": 727,
- "tag": "Action Potential Initiation"
- },
- {
- "id": 595,
- "tag": "Coincidence Detection"
- },
- {
- "id": 590,
- "tag": "I A"
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- {
- "id": 576,
- "tag": "I K"
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- {
- "id": 574,
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- {
- "id": 575,
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- "id": 655,
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- {
- "id": 564,
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- {
- "id": 1068,
- "tag": "ModelDB:59479"
- }
- ],
- "timestamp_created": "2024-01-11 13:52:48.711053+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/59479",
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- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "modeling"
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- "default_context": "master",
- "id": 598,
- "name": "Dendritic Na inactivation drives a decrease in ISI (Fernandez et al 2005)",
- "repository_type": "github",
- "summary": "We use a combination of dynamical analysis and electrophysiological recordings to demonstrate that spike broadening in dendrites is primarily caused by a cumulative inactivation of dendritic Na(+) current. We further show that a reduction in dendritic Na(+) current increases excitability by decreasing the interspike interval (ISI) and promoting burst firing.",
- "tags": [
- {
- "id": 579,
- "tag": "Active Dendrites"
- },
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 565,
- "tag": "Dendritic Action Potentials"
- },
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- "id": 576,
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- "id": 574,
- "tag": "I Na,t"
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- "id": 655,
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- "id": 564,
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- },
- {
- "id": 1069,
- "tag": "ModelDB:59480"
- }
- ],
- "timestamp_created": "2024-01-11 13:52:49.196010+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/59480",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "599": {
- "auto_sync": true,
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- "modeling"
- ],
- "default_context": "master",
- "id": 599,
- "name": "Continuum model of tubulin-driven neurite elongation (Graham et al 2006)",
- "repository_type": "github",
- "summary": "This model investigates the elongation over time of a single developing neurite (axon or dendrite). Our neurite growth model describes the elongation of a single,unbranched neurite in terms of the rate of extension of the microtubule cytoskeleton. The cytoskeleton is not explicitly modelled, but its construction is assumed to depend on the\r\navailable free tubulin at the growing neurite tip.",
- "tags": [
- {
- "id": 793,
- "tag": "Development"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 588,
- "tag": "Olfaction"
- },
- {
- "id": 1070,
- "tag": "ModelDB:59581"
- }
- ],
- "timestamp_created": "2024-01-11 13:52:49.665739+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/59581",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "600": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 600,
- "name": "Compartmental models of growing neurites (Graham and van Ooyen 2004)",
- "repository_type": "github",
- "summary": "Simulator for models of neurite outgrowth. The principle model is a biophysical model of neurite outgrowth described in Graham and van Ooyen (2004). In the model, branching depends on the concentration of a branch-determining substance in each terminal segment. The substance is produced in the cell body and is transported by active transport and diffusion to the terminals. The model reveals that transport-limited effects may give rise to the same modulation of branching as indicated by the stochastic BESTL model. Different limitations arise if transport is dominated by active transport or by diffusion.",
- "tags": [
- {
- "id": 793,
- "tag": "Development"
- },
- {
- "id": 778,
- "tag": "Java"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1071,
- "tag": "ModelDB:59582"
- }
- ],
- "timestamp_created": "2024-01-11 13:52:50.141815+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/59582",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "601": {
- "auto_sync": true,
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- "modeling"
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- "default_context": "master",
- "id": 601,
- "name": "Excitability of the soma in central nervous system neurons (Safronov et al 2000)",
- "repository_type": "github",
- "summary": "The ability of the soma of a spinal dorsal horn neuron, a spinal ventral horn neuron, and a hippocampal pyramidal neuron to generate action potentials was studied using experiments and computer simulations. By comparing recordings ... of a dorsal horn neuron with simulated responses, it was shown that computer models can be adequate for the study of somatic excitability. The modeled somata of both spinal neurons were unable to generate action potentials, showing only passive and local responses to current injections. ... In contrast to spinal neurons, the modeled soma of the hippocampal pyramidal neuron generated spikes with an overshoot of +9 mV. It is concluded that the somata of spinal neurons cannot generate action potentials and seem to resist their propagation from the axon to dendrites. ... See paper for more and details.\r\n",
- "tags": [
- {
- "id": 727,
- "tag": "Action Potential Initiation"
- },
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 567,
- "tag": "Ion Channel Kinetics"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 1072,
- "tag": "ModelDB:62266"
- }
- ],
- "timestamp_created": "2024-01-11 13:52:50.609660+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/62266",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "602": {
- "auto_sync": true,
- "content_types": "modeling",
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- "modeling"
- ],
- "default_context": "master",
- "id": 602,
- "name": "Inhibitory control by an integral feedback signal in prefrontal cortex (Miller and Wang 2006)",
- "repository_type": "github",
- "summary": "The prefrontal cortex (PFC) is known to be critical for inhibitory\r\ncontrol of behavior, but the underlying mechanisms are unclear.\r\nHere, we propose that inhibitory control can be instantiated by an\r\nintegral signal derived from working memory, another key function of the PFC. Specifically, we assume that an integrator converts\r\nexcitatory input into a graded mnemonic activity that provides an\r\ninhibitory signal (integral feedback control) to upstream afferent\r\nneurons. We demonstrate this scenario in a neuronal-network\r\nmodel for a temporal discrimination task... See paper for details\r\nand more.\r\n",
- "tags": [
- {
- "id": 771,
- "tag": "Action Selection/Decision Making"
- },
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 776,
- "tag": "C or Cplusplus program (web link to model)"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 719,
- "tag": "Pattern Recognition"
- },
- {
- "id": 569,
- "tag": "Simplified Models"
- },
- {
- "id": 794,
- "tag": "Working memory"
- },
- {
- "id": 759,
- "tag": "XPPAUT"
- },
- {
- "id": 1073,
- "tag": "ModelDB:62268"
- }
- ],
- "timestamp_created": "2024-01-11 13:52:51.078840+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/62268",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "603": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 603,
- "name": "A model for pituitary GH(3) lactotroph (Wu and Chang 2005)",
- "repository_type": "github",
- "summary": "The ATP-sensitive K(+) (K(ATP)) channels are composed of sulfonylurea receptor and inwardly rectifying K(+) channel (Kir6.2) subunit. These channels are regulated by intracellular ADP/ATP ratio and play a role in cellular metabolism. ... The objective of this study was to determine whether Diethyl pyrocarbonate (DEPC) modifies K(ATP)-channel activity in pituitary GH(3) cells. ... Simulation studies also demonstrated that the increased conductance of K(ATP)-channels used to mimic DEPC actions reduced the frequency of spontaneous action potentials and fluctuation of intracellular Ca(2+). The results indicate that chemical modification with DEPC enhances K(ATP)-channel activity and influences functional activities of pituitary GH(3) cells. See paper for more and details.",
- "tags": [
- {
- "id": 795,
- "tag": "ATP-senstive potassium current"
- },
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 567,
- "tag": "Ion Channel Kinetics"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 759,
- "tag": "XPPAUT"
- },
- {
- "id": 1074,
- "tag": "ModelDB:62272"
- }
- ],
- "timestamp_created": "2024-01-11 15:22:07.585651+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/62272",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "604": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 604,
- "name": "Spike frequency adaptation in spinal sensory neurones (Melnick et al 2004)",
- "repository_type": "github",
- "summary": "Using tight-seal recordings from rat spinal cord slices, intracellular\r\nlabelling and computer simulation, we analysed the mechanisms of spike\r\nfrequency adaptation in substantia gelatinosa (SG)\r\nneurones. Adapting-firing neurones (AFNs) generated short bursts of\r\nspikes during sustained depolarization and were mostly found in\r\nlateral SG. ... Ca2 + -dependent conductances do not contribute to\r\nadapting firing. Transient KA current was small and completely\r\ninactivated at resting potential suggesting that adapting firing was\r\nmainly generated by voltage-gated Na+ and delayed-rectifier K+ (KDR )\r\ncurrents. ... Computer simulation has further revealed that\r\ndown-regulation of Na+ conductance represents an effective mechanism\r\nfor the induction of firing adaptation. It is suggested that the\r\ncell-specific regulation of Na+ channel expression can be an important\r\nfactor underlying the diversity of firing patterns in SG neurones.\r\nSee paper for more and details.",
- "tags": [
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 724,
- "tag": "Short-term Synaptic Plasticity"
- },
- {
- "id": 777,
- "tag": "Spike Frequency Adaptation"
- },
- {
- "id": 1075,
- "tag": "ModelDB:62284"
- }
- ],
- "timestamp_created": "2024-01-11 15:22:08.295469+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/62284",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "605": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 605,
- "name": "Tonic firing in substantia gelatinosa neurons (Melnick et al 2004)",
- "repository_type": "github",
- "summary": "Ionic conductances underlying excitability in tonically firing neurons\r\n(TFNs) from substantia gelatinosa (SG) were studied by the patch-clamp\r\nmethod in rat spinal cord slices. ... Suppression of Ca2+ and KCA currents ... did not\r\nabolish the basic pattern of tonic firing, indicating that it was\r\ngenerated by voltage-gated Na+ and K+ currents. ...\r\n on the basis of present data, we created a model of TFN\r\nand showed that Na+ and KDR currents are sufficient to generate a\r\nbasic pattern of tonic firing. It is concluded that the balanced\r\ncontribution of all ionic conductances described here is important for\r\ngeneration and modulation of tonic firing in SG neurons. See paper for more and details.",
- "tags": [
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 574,
- "tag": "I Na,t"
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- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 1076,
- "tag": "ModelDB:62285"
- }
- ],
- "timestamp_created": "2024-01-11 15:22:08.915964+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/62285",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "606": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 606,
- "name": "Excitation-contraction coupling in an integrative heart cell model (Greenstein et al 2006)",
- "repository_type": "github",
- "summary": "\"... In this study, we generalize a recently developed analytical\r\napproach for deriving simplified mechanistic models of CICR\r\n(Ca(2+)-induced Ca(2+) release) to formulate an integrative model of\r\nthe canine cardiac myocyte which is computationally efficient. The\r\nresulting model faithfully reproduces experimentally measured\r\nproperties of EC (excitation-contraction) coupling and whole cell\r\nphenomena. The model is used to study the role of local redundancy in\r\nL-type Ca(2+) channel gating and the role of dyad configuration on EC\r\ncoupling. Simulations suggest that the characteristic steep rise in EC\r\ncoupling gain observed at hyperpolarized potentials is a result of\r\nincreased functional coupling between LCCs (L-type Ca(2+) channels)\r\nand RyRs (ryanodine-sensitive Ca(2+) release channels). We also\r\ndemonstrate mechanisms by which alterations in the early\r\nrepolarization phase of the action potential, resulting from reduction\r\nof the transient outward potassium current, alters properties of EC\r\ncoupling.\"",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 589,
- "tag": "I L high threshold"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1077,
- "tag": "ModelDB:62286"
- }
- ],
- "timestamp_created": "2024-01-11 15:22:09.413964+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/62286",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "607": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 607,
- "name": "Kv4.3, Kv1.4 encoded K(+) channel in heart cells (Greenstein et al 2000) (XPP)",
- "repository_type": "github",
- "summary": "A model of canine I:(to1) (the Ca(2+)-independent transient outward current) is formulated as the combination of Kv4.3 and Kv1.4 \r\ncurrents and is incorporated into an existing canine ventricular myocyte model. Simulations demonstrate strong \r\ncoupling between L-type Ca(2+) current and I:(Kv4.3) and predict a bimodal relationship between I:(Kv4.3) \r\ndensity and APD whereby perturbations in I:(Kv4.3) density may produce either prolongation or shortening of APD, \r\ndepending on baseline I:(to1) current level.\r\nThe model files were submitted by:\r\nDr. Sheng-Nan Wu, Dr. Ruey J. Sung, Ya-Jean Wang and Jiun-Shian Wu\r\ne-mail: snwu@mail.ncku.edu.tw\r\n",
- "tags": [
- {
- "id": 737,
- "tag": "Heart disease"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 567,
- "tag": "Ion Channel Kinetics"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 759,
- "tag": "XPPAUT"
- },
- {
- "id": 1078,
- "tag": "ModelDB:62287"
- }
- ],
- "timestamp_created": "2024-01-11 15:22:09.897044+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/62287",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "608": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 608,
- "name": "Kv4.3, Kv1.4 encoded K channel in heart cells & tachy. (Winslow et al 1999, Greenstein et al 2000)",
- "repository_type": "github",
- "summary": "(1999) We present a model of the canine midmyocardial ventricular action potential and Ca2+ transient. The model is used to estimate the degree of functional upregulation and downregulation of Na/Ca exchanger protein and sarcoplasmic reticulum Ca ATPase in heart failure using data obtained from 2 different experimental protocols.\r\n(2000): A model of canine I:(to1) (the Ca(2+)-independent transient outward current) is formulated as the combination of Kv4.3 and Kv1.4 \r\ncurrents and is incorporated into an existing canine ventricular myocyte model. Simulations demonstrate strong \r\ncoupling between L-type Ca(2+) current and I:(Kv4.3) and predict a bimodal relationship between I:(Kv4.3) \r\ndensity and APD whereby perturbations in I:(Kv4.3) density may produce either prolongation or shortening of APD, \r\ndepending on baseline I:(to1) current level.\r\nSee each paper for more and details.\r\n",
- "tags": [
- {
- "id": 737,
- "tag": "Heart disease"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 589,
- "tag": "I L high threshold"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 567,
- "tag": "Ion Channel Kinetics"
- },
- {
- "id": 778,
- "tag": "Java"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1079,
- "tag": "ModelDB:62654"
- }
- ],
- "timestamp_created": "2024-01-11 15:22:10.514560+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/62654",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "modeling"
- ],
- "default_context": "master",
- "id": 609,
- "name": "Markovian model for cardiac sodium channel (Clancy, Rudy 2002)",
- "repository_type": "github",
- "summary": "Complex physiological interactions determine the functional consequences of gene abnormalities and make mechanistic interpretation of phenotypes extremely difficult. A recent example is a single mutation in the C terminus of the cardiac Na(+) channel, 1795insD. The mutation causes two distinct clinical syndromes, long QT (LQT) and Brugada, leading to life-threatening cardiac arrhythmias. Coexistence of these syndromes is seemingly paradoxical; LQT is associated with enhanced Na(+) channel function, and Brugada with reduced function. Using a computational approach, we demonstrate that the 1795insD mutation exerts variable effects depending on the myocardial substrate. We develop Markov models of the wild-type and 1795insD cardiac Na(+) channels. See reference for more and details. The model files were submitted by: Dr. Jiun-Shian Wu, Dr. Sheng-Nan Wu, Dr. Ruey J. Sung, Han-Dong Chang.",
- "tags": [
- {
- "id": 796,
- "tag": "Brugada"
- },
- {
- "id": 737,
- "tag": "Heart disease"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 567,
- "tag": "Ion Channel Kinetics"
- },
- {
- "id": 785,
- "tag": "Long-QT"
- },
- {
- "id": 748,
- "tag": "Markov-type model"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 787,
- "tag": "Pathophysiology"
- },
- {
- "id": 759,
- "tag": "XPPAUT"
- },
- {
- "id": 1080,
- "tag": "ModelDB:62661"
- }
- ],
- "timestamp_created": "2024-01-11 15:22:10.988025+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/62661",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "610": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 610,
- "name": "Sodium currents activate without a delay (Baranauskas and Martina 2006)",
- "repository_type": "github",
- "summary": "Hodgkin and Huxley established that sodium currents in the squid giant\r\naxons activate after a delay, which is explained by the model of a\r\nchannel with three identical independent gates that all have to open\r\nbefore the channel can pass current (the HH model). It is assumed that\r\nthis model can adequately describe the sodium current activation time\r\ncourse in all mammalian central neurons, although there is no\r\nexperimental evidence to support such a conjecture. We performed high\r\ntemporal resolution studies of sodium currents gating in three types\r\nof central neurons. ... These results can be explained by a model with\r\ntwo closed states and one open state. ... This\r\nmodel captures all major properties of the sodium current\r\nactivation. In addition, the proposed model reproduces the observed\r\naction potential shape more accurately than the traditional HH model.\r\nSee paper for more and details.\r\n",
- "tags": [
- {
- "id": 727,
- "tag": "Action Potential Initiation"
- },
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 567,
- "tag": "Ion Channel Kinetics"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 1081,
- "tag": "ModelDB:62673"
- }
- ],
- "timestamp_created": "2024-01-11 15:22:11.792198+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/62673",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "611": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 611,
- "name": "Markovian model for single-channel recordings of Ik_1 in ventricular cells (Matsuoka et al 2003)",
- "repository_type": "github",
- "summary": "The interaction between many currents in a cardiac ventricular model are examined in this paper. One of the main contributions come from a current called IK_1. An XPP version of this model was supplied by\r\nHsieng-Jung Lai, Jiun-Shian Wu, Sheng-Nan Wu, Ruey J. Sung, Han-Dong\r\nChang. Please see paper and model for more and details.",
- "tags": [
- {
- "id": 797,
- "tag": "Cardiac pacemaking"
- },
- {
- "id": 737,
- "tag": "Heart disease"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 567,
- "tag": "Ion Channel Kinetics"
- },
- {
- "id": 748,
- "tag": "Markov-type model"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 759,
- "tag": "XPPAUT"
- },
- {
- "id": 1082,
- "tag": "ModelDB:62676"
- }
- ],
- "timestamp_created": "2024-01-11 15:22:12.363164+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/62676",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "612": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 612,
- "name": "Dichotomy of action-potential backpropagation in CA1 pyramidal neuron dendrites (Golding et al 2001)",
- "repository_type": "github",
- "summary": "From reference below and \r\nCorrigendum: J Neurophysiol 87:1a, 2002 (better versions of figures 2, 3, 5 and 7 because of poor print quality in the original article; as of 2/2006, these figures are perfectly fine in the PDF of the original article that is currently available from the publisher's WWW site).\r\nExamines the anatomical and biophysical factors that account for the fact that retrograde invasion of spikes into the apical dendritic tree past 300 um succeeds in some CA1 pyramidal neurons but fails in others.",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 579,
- "tag": "Active Dendrites"
- },
- {
- "id": 565,
- "tag": "Dendritic Action Potentials"
- },
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 570,
- "tag": "Influence of Dendritic Geometry"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 743,
- "tag": "NEURON (web link to model)"
- },
- {
- "id": 1083,
- "tag": "ModelDB:64167"
- }
- ],
- "timestamp_created": "2024-01-11 15:22:12.877191+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/64167",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "613": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 613,
- "name": "Voltage attenuation in CA1 pyramidal neuron dendrites (Golding et al 2005)",
- "repository_type": "github",
- "summary": "Voltage attenuation in the apical dendritic field of CA1 pyramidal neurons is particularly strong for epsps spreading toward the soma. High cytoplasmic resistivity and high membrane (leak) conductance appear to be the major determinants of voltage attenuation over most of the apical field, but H current may be responsible for as much as half of the attenuation of distal apical epsps.",
- "tags": [
- {
- "id": 579,
- "tag": "Active Dendrites"
- },
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 786,
- "tag": "Electrotonus"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 570,
- "tag": "Influence of Dendritic Geometry"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 743,
- "tag": "NEURON (web link to model)"
- },
- {
- "id": 596,
- "tag": "Synaptic Integration"
- },
- {
- "id": 1084,
- "tag": "ModelDB:64170"
- }
- ],
- "timestamp_created": "2024-01-11 15:22:13.364450+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/64170",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "614": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 614,
- "name": "Cardiac action potential based on Luo-Rudy phase 1 model (Luo and Rudy 1991), (Wu 2004)",
- "repository_type": "github",
- "summary": "A mathematical model of the membrane action potential of the mammalian \r\nventricular cell is introduced. The model is based, whenever possible, \r\non recent single-cell and single-channel data and incorporates the \r\npossibility of changing extracellular potassium concentration [K]o. The \r\nfast sodium current, INa, is characterized by fast upstroke velocity (Vmax \r\n= 400 V/sec) and slow recovery from inactivation. The time-independent \r\npotassium current, IK1, includes a negative-slope phase and displays \r\nsignificant crossover phenomenon as [K]o is varied. The time-dependent \r\npotassium current, IK, shows only a minimal degree of crossover. A novel \r\npotassium current that activates at plateau potentials is included in \r\nthe model. The simulated action potential duplicates the experimentally \r\nobserved effects of changes in [K]o on action potential duration and rest \r\npotential. See papers for more and details.",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 737,
- "tag": "Heart disease"
- },
- {
- "id": 567,
- "tag": "Ion Channel Kinetics"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 787,
- "tag": "Pathophysiology"
- },
- {
- "id": 759,
- "tag": "XPPAUT"
- },
- {
- "id": 1085,
- "tag": "ModelDB:64171"
- }
- ],
- "timestamp_created": "2024-01-11 15:22:13.841154+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/64171",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "615": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 615,
- "name": "Stochastic Ih and Na-channels in pyramidal neuron dendrites (Kole et al 2006)",
- "repository_type": "github",
- "summary": "The hyperpolarization-activated cation current (Ih) plays an important role in regulating neuronal excitability, yet its native single-channel properties in the brain are essentially unknown. Here we use variance-mean analysis to study the properties of single Ih channels in the apical dendrites of cortical layer 5 pyramidal neurons in vitro. ... In contrast to the uniformly distributed single-channel conductance, Ih channel number increases exponentially with distance, reaching densities as high as approximately 550 channels/microm2 at distal dendritic sites. These high channel densities generate significant membrane voltage noise. By incorporating a stochastic model of Ih single-channel gating into a morphologically realistic model of a layer 5 neuron, we show that this channel noise is higher in distal dendritic compartments and increased threefold with a 10-fold increased single-channel conductance (6.8 pS) but constant Ih current density. ... These data suggest that, in the face of high current densities, the small single-channel conductance of Ih is critical for maintaining the fidelity of action potential output. See paper for more and details.",
- "tags": [
- {
- "id": 579,
- "tag": "Active Dendrites"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 567,
- "tag": "Ion Channel Kinetics"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 1086,
- "tag": "ModelDB:64195"
- }
- ],
- "timestamp_created": "2024-01-11 15:22:14.310358+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/64195",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "616": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 616,
- "name": "Vomeronasal sensory neuron (Shimazaki et al 2006)",
- "repository_type": "github",
- "summary": "NEURON model files from the papers:\r\nShimazaki et al, Chem. Senses, epub ahead of print (2006)\r\nElectrophysiological properties and modeling of murine vomeronasal \r\nsensory neurons in acute slice preparations.\r\n\r\nThe model reproduces quantitatively the experimentally observed \r\nfiring rates of these neurons under a wide range of input currents.",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 1087,
- "tag": "ModelDB:64212"
- }
- ],
- "timestamp_created": "2024-01-11 15:22:14.773227+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/64212",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "617": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 617,
- "name": "Reciprocal regulation of rod and cone synapse by NO (Kourennyi et al 2004)",
- "repository_type": "github",
- "summary": "We constructed models of rod and cone photoreceptors\r\nusing NEURON software to predict how changes in Ca channels\r\nwould affect the light response in these cells and in\r\npostsynaptic horizontal cells.",
- "tags": [
- {
- "id": 572,
- "tag": "Calcium dynamics"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 765,
- "tag": "I Chloride"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 726,
- "tag": "Vision"
- },
- {
- "id": 1088,
- "tag": "ModelDB:64216"
- }
- ],
- "timestamp_created": "2024-01-11 15:22:15.341640+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/64216",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "618": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 618,
- "name": "Simulated light response in rod photoreceptors (Liu and Kourennyi 2004)",
- "repository_type": "github",
- "summary": "We developed a complete computer model of the rod, which accurately reproduced the main features of the light response and allowed us to demonstrate that it was suppression of Kx channels that was essential for slowing SLR and increasing excitability of rods. The results reported in this work further establish the importance of Kx channels in rod photoreceptor function.",
- "tags": [
- {
- "id": 727,
- "tag": "Action Potential Initiation"
- },
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 572,
- "tag": "Calcium dynamics"
- },
- {
- "id": 765,
- "tag": "I Chloride"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 589,
- "tag": "I L high threshold"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 1089,
- "tag": "ModelDB:64228"
- }
- ],
- "timestamp_created": "2024-01-11 15:22:15.852965+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/64228",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "619": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 619,
- "name": "Parallel network simulations with NEURON (Migliore et al 2006)",
- "repository_type": "github",
- "summary": "The NEURON simulation environment has been extended to support parallel network simulations.\r\nThe performance of three published network models with very different spike patterns exhibits superlinear speedup on Beowulf clusters.\r\n",
- "tags": [
- {
- "id": 756,
- "tag": "Methods"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 1090,
- "tag": "ModelDB:64229"
- }
- ],
- "timestamp_created": "2024-01-11 15:22:16.346398+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/64229",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "620": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 620,
- "name": "Biologically-plausible models for spatial navigation (Cannon et al 2003)",
- "repository_type": "github",
- "summary": "Hypotheses about how parahippocampal and hippocampal structures may be involved in spatial navigation tasks are implemented in a model of a virtual rat navigating through a virtual environment in search of a food reward. The model incorporates theta oscillations to separate encoding from retrieval and yields testable predictions about the phase relations of spiking activity to theta oscillations in different parts of the hippocampal formation at various stages of the behavioral task. See paper for more and details.",
- "tags": [
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 798,
- "tag": "Catacomb (web link to model)"
- },
- {
- "id": 749,
- "tag": "Long-term Synaptic Plasticity"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 799,
- "tag": "Place cell/field"
- },
- {
- "id": 569,
- "tag": "Simplified Models"
- },
- {
- "id": 800,
- "tag": "Spatial Navigation"
- },
- {
- "id": 725,
- "tag": "Synaptic Plasticity"
- },
- {
- "id": 1091,
- "tag": "ModelDB:64242"
- }
- ],
- "timestamp_created": "2024-01-11 15:22:16.825472+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/64242",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "621": {
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- "default_context": "master",
- "id": 621,
- "name": "A dynamical model of the basal ganglia (Leblois et al 2006)",
- "repository_type": "github",
- "summary": "We propose a new model for the function and dysfunction of the basal ganglia (BG). \r\nThe basal ganglia are a set of cerebral structures involved in motor control which \r\ndysfunction causes high-incidence pathologies such as Parkinson's disease (PD). \r\nTheir precise motor functions remain unknown. \r\nThe classical model of the BG that allowed for the discovery of new treatments \r\nfor PD seems today outdated in several respects. \r\nBased on experimental observations, our model proposes a simple dynamical framework \r\nfor the understanding of how BG may select motor programs to be executed. Moreover, \r\nwe explain how this ability is lost and how tremor-related oscillations in neuronal \r\nactivity may emerge in PD. \r\n",
- "tags": [
- {
- "id": 755,
- "tag": "C or Cplusplus program"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 801,
- "tag": "Parkinson's"
- },
- {
- "id": 787,
- "tag": "Pathophysiology"
- },
- {
- "id": 791,
- "tag": "Rate-coding model neurons"
- },
- {
- "id": 569,
- "tag": "Simplified Models"
- },
- {
- "id": 587,
- "tag": "Spatio-temporal Activity Patterns"
- },
- {
- "id": 1092,
- "tag": "ModelDB:64255"
- }
- ],
- "timestamp_created": "2024-01-11 15:22:17.321164+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/64255",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "622": {
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- "modeling"
- ],
- "default_context": "master",
- "id": 622,
- "name": "Steady-state Vm distribution of neurons subject to synaptic noise (Rudolph, Destexhe 2005)",
- "repository_type": "github",
- "summary": "This package simulates synaptic background activity similar to in vivo measurements using a model of fluctuating synaptic conductances, and compares the simulations with analytic estimates. The steady-state membrane potential (Vm) distribution is calculated numerically and compared with the \"extended\" analytic expression provided in the reference (see this paper for details).",
- "tags": [
- {
- "id": 564,
- "tag": "ModelDB"
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- {
- "id": 577,
- "tag": "NEURON"
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- {
- "id": 569,
- "tag": "Simplified Models"
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- "id": 744,
- "tag": "Synaptic noise"
- },
- {
- "id": 1093,
- "tag": "ModelDB:64259"
- }
- ],
- "timestamp_created": "2024-01-11 15:22:17.781681+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/64259",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "623": {
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- "content_types": "modeling",
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- "modeling"
- ],
- "default_context": "master",
- "id": 623,
- "name": "Learning spatial transformations through STDP (Davison, Fr\u00e9gnac 2006)",
- "repository_type": "github",
- "summary": "A common problem in tasks involving the integration of spatial information from multiple senses, or in sensorimotor coordination, is that different modalities represent space in different frames of reference. Coordinate transformations between different reference frames are therefore required. One way to achieve this relies on the encoding of spatial information using population codes. The set of network responses to stimuli in different locations (tuning curves) constitute a basis set of functions which can be combined\r\nlinearly through weighted synaptic connections in order to approximate non-linear transformations of the input variables. The question then arises how the appropriate synaptic connectivity is obtained. \r\n\r\nThis model shows that a network of spiking neurons can learn the coordinate transformation from one frame of reference to another, with connectivity that develops continuously in an unsupervised manner, based only on the correlations available in the environment, and with a biologically-realistic plasticity mechanism (spike timing-dependent plasticity).",
- "tags": [
- {
- "id": 749,
- "tag": "Long-term Synaptic Plasticity"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 802,
- "tag": "STDP"
- },
- {
- "id": 725,
- "tag": "Synaptic Plasticity"
- },
- {
- "id": 803,
- "tag": "Unsupervised Learning"
- },
- {
- "id": 1094,
- "tag": "ModelDB:64261"
- }
- ],
- "timestamp_created": "2024-01-11 15:22:18.253545+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/64261",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "624": {
- "auto_sync": true,
- "content_types": "modeling",
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- ],
- "default_context": "main",
- "id": 624,
- "name": "Simple model of barrel-specific segregation in cortex (Lu et al 2006)",
- "repository_type": "github",
- "summary": "Mice with a loss-of-function mutation of calcium/calmodulin-activated adenylyl cyclase I (AC1) - barrelless mice - have strikingly abherrent cortical development: the thalamic afferents into the barrel cortex do not segregate into whisker-specific barrels. Our paper investigates the link between this mutation and the \"barrelless\" phenotype, and demonstrates that the loss-of-function mutation leads to deficits in presynaptic mechanisms at the thalamocortical synapse.\r\n\r\nHow might presynaptic deficits disrupt whisker-specific segregation in the barrel cortex? We used a model to demonstrate one possibility: decrease in the release probability at the thalamocortical synapse (which is observed in the barrelless mutant) can influence the balance between LTP and LTD (in favor of LTD), which can disrupt whisker segregaton. Though how this occurs is easily explained with a conceptual model (described succinctly in the associated paper), we also produced a computational simulation of this phenomenon.",
- "tags": [
- {
- "id": 776,
- "tag": "C or Cplusplus program (web link to model)"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1095,
- "tag": "ModelDB:64266"
- }
- ],
- "timestamp_created": "2024-01-11 15:22:18.859646+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/64266",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "625": {
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- "content_types": "modeling",
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- "modeling"
- ],
- "default_context": "master",
- "id": 625,
- "name": "Dopaminergic cell bursting model (Kuznetsov et al 2006)",
- "repository_type": "github",
- "summary": "Dopaminergic neurons of the midbrain fire spontaneously at rates\r\n<10/s and ordinarily will not exceed this range even when driven with\r\nsomatic current injection. During spontaneous\r\nbursting of dopaminergic neurons in vivo, bursts related to reward\r\nexpectation in behaving animals, and bursts generated by dendritic\r\napplication of N-methyl-D-aspartate (NMDA) agonists, transient firing\r\nattains rates well above this range. We suggest a way such highfrequency\r\nfiring may occur in response to dendritic NMDA receptor\r\nactivation. We have extended the coupled oscillator model of the\r\ndopaminergic neuron, which represents the soma and dendrites as\r\nelectrically coupled compartments with different natural spiking frequencies,\r\nby addition of dendritic AMPA (voltage-independent) or\r\nNMDA (voltage-dependent) synaptic conductance. Both soma and\r\ndendrites contain a simplified version of the calcium-potassium mechanism\r\nknown to be the mechanism for slow spontaneous oscillation\r\nand background firing in dopaminergic cells. We show that because of its voltage dependence,\r\nNMDA receptor activation acts to amplify the effect on the\r\nsoma of the high-frequency oscillation of the dendrites, which is\r\nnormally too weak to exert a large influence on the overall oscillation\r\nfrequency of the neuron.",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
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- "id": 566,
- "tag": "Bursting"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
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- "id": 581,
- "tag": "I K,Ca"
- },
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- "id": 564,
- "tag": "ModelDB"
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- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 759,
- "tag": "XPPAUT"
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- {
- "id": 1096,
- "tag": "ModelDB:64285"
- }
- ],
- "timestamp_created": "2024-01-11 15:22:19.427550+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/64285",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
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- "username": "osbadmin"
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- "626": {
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- ],
- "default_context": "master",
- "id": 626,
- "name": "Dynamical model of olfactory bulb mitral cell (Rubin, Cleland 2006)",
- "repository_type": "github",
- "summary": "This four-compartment mitral cell exhibits endogenous subthreshold oscillations, phase resetting, and evoked spike phasing properties as described in electrophysiological studies of mitral cells. It is derived from the prior work of Davison et al (2000) and Bhalla and Bower (1993). See readme.txt for details.",
- "tags": [
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- "id": 566,
- "tag": "Bursting"
- },
- {
- "id": 754,
- "tag": "Delay"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 730,
- "tag": "I A, slow"
- },
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- "id": 583,
- "tag": "I Calcium"
- },
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- "id": 576,
- "tag": "I K"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 591,
- "tag": "I K,leak"
- },
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- "id": 589,
- "tag": "I L high threshold"
- },
- {
- "id": 739,
- "tag": "I Na,p"
- },
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- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
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- "id": 582,
- "tag": "I Sodium"
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- "id": 594,
- "tag": "I h"
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- {
- "id": 564,
- "tag": "ModelDB"
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- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 588,
- "tag": "Olfaction"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 569,
- "tag": "Simplified Models"
- },
- {
- "id": 586,
- "tag": "Synchronization"
- },
- {
- "id": 720,
- "tag": "Temporal Pattern Generation"
- },
- {
- "id": 1097,
- "tag": "ModelDB:64296"
- }
- ],
- "timestamp_created": "2024-01-11 15:22:19.965472+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/64296",
- "user": {
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- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "627": {
- "auto_sync": true,
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- ],
- "default_context": "master",
- "id": 627,
- "name": "Computational Model of a Central Pattern Generator (Cataldo et al 2006)",
- "repository_type": "github",
- "summary": "The buccal ganglia of Aplysia contain a central pattern generator (CPG) that mediates rhythmic movements of the foregut during feeding. This CPG is a multifunctional circuit and generates at least two types of buccal motor patterns (BMPs), one that mediates ingestion (iBMP) and another that mediates rejection (rBMP). The present study used a computational approach to examine the ways in which an ensemble of identified cells and synaptic connections function as a CPG. Hodgkin-Huxley-type models were developed that mimicked the biophysical properties of these cells and synaptic connections. The results suggest that the currently identified ensemble of cells is inadequate to produce rhythmic neural activity and that several key elements of the CPG remain to be identified.",
- "tags": [
- {
- "id": 765,
- "tag": "I Chloride"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 739,
- "tag": "I Na,p"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 729,
- "tag": "Invertebrate"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 757,
- "tag": "SNNAP"
- },
- {
- "id": 720,
- "tag": "Temporal Pattern Generation"
- },
- {
- "id": 1098,
- "tag": "ModelDB:65412"
- }
- ],
- "timestamp_created": "2024-01-11 15:22:20.460767+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/65412",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "628": {
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- "default_context": "master",
- "id": 628,
- "name": "CA1 pyramidal cell: I_NaP and I_M contributions to somatic bursting (Golomb et al 2006)",
- "repository_type": "github",
- "summary": "To study the mechanisms of bursting, we have constructed a\r\nconductance-based, one-compartment model of CA1 pyramidal neurons. In this neuron model,\r\nreduced [Ca2+]o is simulated by negatively shifting the activation curve of the persistent Na+ current\r\n(INaP), as indicated by recent experimental results. The neuron model accounts, with different\r\nparameter sets, for the diversity of firing patterns observed experimentally in both zero and normal\r\n[Ca2+]o. Increasing INaP in the neuron model induces bursting and increases the number of spikes\r\nwithin a burst, but is neither necessary nor sufficient for bursting. We show, using fast-slow analysis\r\nand bifurcation theory, that the M-type K+ current (IM) allows bursting by shifting neuronal behavior\r\nbetween a silent and a tonically-active state, provided the kinetics of the spike generating currents are\r\nsufficiently, though not extremely, fast. We suggest that bursting in CA1 pyramidal cells can be\r\nexplained by a single compartment *square bursting* mechanism with one slow variable, the\r\nactivation of IM. See paper for more and details.",
- "tags": [
- {
- "id": 804,
- "tag": "Bifurcation"
- },
- {
- "id": 566,
- "tag": "Bursting"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 580,
- "tag": "I M"
- },
- {
- "id": 739,
- "tag": "I Na,p"
- },
- {
- "id": 574,
- "tag": "I Na,t"
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- {
- "id": 564,
- "tag": "ModelDB"
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- {
- "id": 759,
- "tag": "XPPAUT"
- },
- {
- "id": 1099,
- "tag": "ModelDB:66268"
- }
- ],
- "timestamp_created": "2024-01-11 15:22:20.979740+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/66268",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "629": {
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- "modeling"
- ],
- "default_context": "master",
- "id": 629,
- "name": "CA1 pyramidal neuron synaptic integration (Li and Ascoli 2006, 2008)",
- "repository_type": "github",
- "summary": "The model shows how different input patterns (irregular & asynchronous,\r\nirregular & synchronous, regular & asynchronous, regular & synchronous)\r\naffect the neuron's output rate when 1000 synapses are distributed in\r\nthe proximal apical dendritic tree of a hippocampus CA1 pyramidal neuron.",
- "tags": [
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 590,
- "tag": "I A"
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- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 574,
- "tag": "I Na,t"
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- "id": 594,
- "tag": "I h"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 596,
- "tag": "Synaptic Integration"
- },
- {
- "id": 1100,
- "tag": "ModelDB:71312"
- }
- ],
- "timestamp_created": "2024-01-11 15:22:21.468777+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/71312",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
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- "630": {
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- "modeling"
- ],
- "default_context": "master",
- "id": 630,
- "name": "Activity dependent changes in motoneurones (Dai Y et al 2002, Gardiner et al 2002)",
- "repository_type": "github",
- "summary": "These two papers review various experimental papers and examine the effects of activity on motoneurons in a similar 5 compartment model with 10 active conductances. Included are slow (S) and fast (F) type and fast fatigue resistant (FR) and fast fatigable (FF) models corresponding to the types of motoneurons. See papers for more and details.",
- "tags": [
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 600,
- "tag": "GENESIS"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 576,
- "tag": "I K"
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- {
- "id": 589,
- "tag": "I L high threshold"
- },
- {
- "id": 721,
- "tag": "I N"
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- {
- "id": 739,
- "tag": "I Na,p"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 575,
- "tag": "I T low threshold"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 567,
- "tag": "Ion Channel Kinetics"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 569,
- "tag": "Simplified Models"
- },
- {
- "id": 732,
- "tag": "Tutorial/Teaching"
- },
- {
- "id": 1101,
- "tag": "ModelDB:71317"
- }
- ],
- "timestamp_created": "2024-01-11 15:22:22.098138+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/71317",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "631": {
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- "default_context": "master",
- "id": 631,
- "name": "Rat subthalamic projection neuron (Gillies and Willshaw 2006)",
- "repository_type": "github",
- "summary": "A computational model of the rat subthalamic nucleus projection neuron is constructed using electrophysiological and morphological data and a restricted set of channel specifications. The model cell exhibits a wide range of electrophysiological behaviors characteristic of rat subthalamic neurons. It reveals that a key set of three channels play a primary role in distinguishing behaviors: a high-voltage-activated calcium channel (Cav 1.2.-1.3), a low-voltage-activated calcium channel (Cav 3.-), and a small current calcium-activated potassium channel (KCa 2.1-2.3). See paper for more and details.",
- "tags": [
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- "id": 566,
- "tag": "Bursting"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 589,
- "tag": "I L high threshold"
- },
- {
- "id": 805,
- "tag": "I Mixed"
- },
- {
- "id": 721,
- "tag": "I N"
- },
- {
- "id": 739,
- "tag": "I Na,p"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 575,
- "tag": "I T low threshold"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 1102,
- "tag": "ModelDB:74298"
- }
- ],
- "timestamp_created": "2024-01-11 15:22:22.619501+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/74298",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "632": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 632,
- "name": "Excitatory and inhibitory interactions in populations of model neurons (Wilson and Cowan 1972)",
- "repository_type": "github",
- "summary": "Coupled nonlinear differential equations are derived for the dynamics\r\nof spatially localized populations containing both excitatory and inhibitory model\r\nneurons. Phase plane methods and numerical solutions are then used to investigate\r\npopulation responses to various types of stimuli. The results obtained show simple\r\nand multiple hysteresis phenomena and limit cycle activity. The latter is particularly\r\ninteresting since the frequency of the limit cycle oscillation is found to be a monotonic\r\nfunction of stimulus intensity. Finally, it is proved that the existence of limit cycle\r\ndynamics in response to one class of stimuli implies the existence of multiple stable\r\nstates and hysteresis in response to a different class of stimuli. The relation between\r\nthese findings and a number of experiments is discussed.",
- "tags": [
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 759,
- "tag": "XPPAUT"
- },
- {
- "id": 1103,
- "tag": "ModelDB:76879"
- }
- ],
- "timestamp_created": "2024-01-11 15:22:23.102643+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/76879",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "633": {
- "auto_sync": true,
- "content_types": "modeling",
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- "modeling"
- ],
- "default_context": "main",
- "id": 633,
- "name": "Scaling self-organizing maps to model large cortical networks (Bednar et al 2004)",
- "repository_type": "github",
- "summary": "Self-organizing computational models\r\nwith specific intracortical connections can\r\nexplain many functional features of visual\r\ncortex, such as topographic orientation and\r\nocular dominance maps. ... This article\r\nintroduces two techniques that make large simulations\r\npractical. \r\n\r\nFirst, we show how parameter\r\nscaling equations can be derived for\r\nlaterally connected self-organizing models.\r\nThese equations result in quantitatively equivalent\r\nmaps over a wide range of simulation\r\nsizes, making it possible to debug small simulations\r\nand then scale them up only when\r\nneeded. ...\r\nSecond, we use parameter\r\nscaling to implement a new growing map\r\nmethod called GLISSOM, which dramatically\r\nreduces the memory and computational\r\nrequirements of large self-organizing networks.\r\n\r\nSee paper for more and details.",
- "tags": [
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 588,
- "tag": "Olfaction"
- },
- {
- "id": 587,
- "tag": "Spatio-temporal Activity Patterns"
- },
- {
- "id": 720,
- "tag": "Temporal Pattern Generation"
- },
- {
- "id": 806,
- "tag": "Topographica (web link to model)"
- },
- {
- "id": 803,
- "tag": "Unsupervised Learning"
- },
- {
- "id": 1104,
- "tag": "ModelDB:76883"
- }
- ],
- "timestamp_created": "2024-01-11 15:22:23.722914+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/76883",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "634": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 634,
- "name": "An oscillatory neural model of multiple object tracking (Kazanovich and Borisyuk 2006)",
- "repository_type": "github",
- "summary": "An oscillatory neural network model of multiple object tracking is described. The model works with a set of identical visual objects moving around the screen. At the initial stage, the model selects into the focus of attention a subset of objects initially marked as targets. Other objects are used as distractors. The model aims to preserve the initial separation between targets and distractors while objects are moving. This is achieved by a proper interplay of synchronizing and desynchronizing interactions in a multilayer network, where each layer is responsible for tracking a single target. The results of the model simulation are presented and compared with experimental data. In agreement with experimental evidence, simulations with a larger number of targets have shown higher error rates. Also, the functioning of the model in the case of temporarily overlapping objects is presented.",
- "tags": [
- {
- "id": 755,
- "tag": "C or Cplusplus program"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 569,
- "tag": "Simplified Models"
- },
- {
- "id": 587,
- "tag": "Spatio-temporal Activity Patterns"
- },
- {
- "id": 1105,
- "tag": "ModelDB:79145"
- }
- ],
- "timestamp_created": "2024-01-11 15:22:24.243334+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/79145",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "635": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 635,
- "name": "Simulation study of Andersen-Tawil syndrome (Sung et al 2006)",
- "repository_type": "github",
- "summary": "Patients with Andersen-Tawil syndrome (ATS) mostly have mutations on the KCNJ2 gene producing loss of function or \r\ndominant-negative suppression of the inward rectifier K(+) channel Kir2.1. However, clinical manifestations of ATS \r\nincluding dysmorphic features, periodic paralysis (hypo-, hyper-, or normokalemic), long QT, and ventricular arrhythmias \r\n(VA) are considerably variable. Using a modified dynamic Luo-Rudy simulation model of cardiac ventricular myocyte, we \r\nelucidate the mechanisms of VA in ATS. We adopted a kinetic model of KCNJ2 in which channel block by Mg(+2) and \r\nspermine was incorporated. In this study, we attempt to examine the effects of KCNJ2 mutations on the ventricular action \r\npotential (AP), single-channel Markovian models were reformulated and incorporated into the dynamic Luo-Rudy model \r\nfor rapidly and slowly delayed rectifying K(+) currents and KCNJ2 channel. During pacing at 1.0 Hz with [K(+)]o at 5.4 \r\nmM, a stepwise 10% reduction of Kir2.1 channel conductance progressively prolonged the terminal repolarization phase \r\nof AP along with gradual depolarization of the resting membrane potential (RMP). At 90% reduction, early after-\r\ndepolarizations (EADs) became inducible and RMP was depolarized to -55.0 mV (control: -90.1 mV) followed by \r\nemergence of spontaneous action potentials (SAP). Both EADs and SAP were facilitated by a decrease in [K(+)]o and \r\nsuppressed by increase in [K(+)]o. beta-adrenergic stimulation enhanced delayed after-depolarizations (DADs) and could \r\nalso facilitate EADs as well as SAP in the setting of low [K(+)]o and reduced Kir2.1 channel conductance. In conclusion, \r\nthe spectrum of VA in ATS includes (1) triggered activity mediated by EADs and/or DADs, and (2) abnormal automaticity \r\nmanifested as SAP. These VA can be aggravated by a decrease in [K(+)]o and beta-adrenergic stimulation, and may \r\npotentially induce torsades de pointes and cause sudden death. In patients with ATS, the hypokalemic form of periodic \r\nparalysis should have the highest propensity to VA especially during physical activities.",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 755,
- "tag": "C or Cplusplus program"
- },
- {
- "id": 737,
- "tag": "Heart disease"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 589,
- "tag": "I L high threshold"
- },
- {
- "id": 805,
- "tag": "I Mixed"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 575,
- "tag": "I T low threshold"
- },
- {
- "id": 567,
- "tag": "Ion Channel Kinetics"
- },
- {
- "id": 785,
- "tag": "Long-QT"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 740,
- "tag": "Na/K pump"
- },
- {
- "id": 741,
- "tag": "Sodium pump"
- },
- {
- "id": 1106,
- "tag": "ModelDB:79237"
- }
- ],
- "timestamp_created": "2024-01-11 15:22:24.760362+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/79237",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "636": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 636,
- "name": "Action potential of striated muscle fiber (Adrian et al 1970)",
- "repository_type": "github",
- "summary": "1. Membrane currents during step depolarizations were determined by \r\na method in which three electrodes were inserted near the end of a \r\nfibre in the frog's sartorius muscle. The theoretical basis and \r\nlimitations of the method are discussed.\r\n2. Measurements of the membrane capacity (CM) and resting resistance \r\n(RM) derived from the current during a step change in membrane \r\npotential are consistent with values found by other methods.\r\n3. In fibres made mechanically inactive with hypertonic solutions \r\n(Ringer solution plus 350 mM sucrose) step depolarizations produced \r\nionic currents which resembled those of nerve in showing (a) an early \r\ntransient inward current, abolished by tetrodotoxin, which reversed \r\nwhen the depolarization was carried beyond an internal potential of \r\nabout +20 mV, (b) a delayed outward current, with a linear instantaneous \r\ncurrent\u00a1Xvoltage relation, and a mean equilibrium potential with a normal \r\npotassium concentration (2\u00a1P5 mM) of -85 mV.\r\n4. The reversal potential for the early current appears to be consistent\r\nwith the sodium equilibrium potential expected in hypertonic solutions.\r\n5. The variation of the equilibrium potential for the delayed current \r\n(V\u00a1\u00acK) with external potassium concentration suggests that the channel \r\nfor delayed current has a ratio of potassium to sodium permeability of \r\n30:1; this is less than the resting membrane where the ratio appears \r\nto be 100:1. V\u00a1\u00acK corresponds well with the membrane potential at the \r\nbeginning of the negative after-potential observed under similar conditions.\r\n6. The variation of V\u00a1\u00acK with the amount of current which has passed \r\nthrough the delayed channel suggests that potassium ions accumulate in a \r\nspace of between 1/3 and 1/6 of the fibre volume. If potassium accumulates in \r\nthe transverse tubular system (T system) much greater variation in V\u00a1\u00acK \r\nwould be expected.\r\n7. The delayed current is not maintained but is inactivated like the early \r\ncurrent. The inactivation is approximately exponential with a time constant \r\nof 0\u00a1P5 to 1 sec at 20\u00a2X C. The steady-state inactivation of the potassium \r\ncurrent is similar to that for the sodium current, but its voltage \r\ndependence is less steep and the potential for half inactivation is 20 mV \r\nrate more positive.\r\n8. Reconstructions of ionic currents were made in terms of the parameters\r\n(m, n, h) of the Hodgkin\u00a1XHuxley model for the squid axon, using constants \r\nwhich showed a similar dependence on voltage.\r\n9. Propagated action potentials and conduction velocities were computed for \r\nvarious conditions on the assumption that the T system behaves as if it were \r\na series resistance and capacity in parallel with surface capacity and the \r\nchannels for sodium, potassium and leak current. There was reasonable \r\nagreement with observed values, the main difference being that the \r\ncalculated velocities and rates of rise were somewhat less than those \r\nobserved experimentally.",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 759,
- "tag": "XPPAUT"
- },
- {
- "id": 1107,
- "tag": "ModelDB:79238"
- }
- ],
- "timestamp_created": "2024-01-11 15:22:25.357424+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/79238",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "637": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 637,
- "name": "Cardiac Atrial Cell (Courtemanche et al 1998) (C++)",
- "repository_type": "github",
- "summary": "The mechanisms underlying many important properties of the human atrial action potential (AP) \r\nare poorly understood. Using specific formulations of the K+, Na+, and Ca2+ currents based on \r\ndata recorded from human atrial myocytes, along with representations of pump, exchange, and \r\nbackground currents, we developed a mathematical model of the AP. The model AP resembles APs \r\nrecorded from human atrial samples and responds to rate changes, L-type Ca2+ current blockade, \r\nNa+/Ca2+ exchanger inhibition, and variations in transient outward current amplitude in a \r\nfashion similar to experimental recordings. Rate-dependent adaptation of AP duration, an \r\nimportant determinant of susceptibility to atrial fibrillation, was attributable to \r\nincomplete L-type Ca2+ current recovery from inactivation and incomplete delayed rectifier \r\ncurrent deactivation at rapid rates. Experimental observations of variable AP morphology \r\ncould be accounted for by changes in transient outward current density, as suggested \r\nexperimentally. We conclude that this mathematical model of the human atrial AP reproduces \r\na variety of observed AP behaviors and provides insights into the mechanisms of clinically \r\nimportant AP properties.\r\n",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 755,
- "tag": "C or Cplusplus program"
- },
- {
- "id": 737,
- "tag": "Heart disease"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 589,
- "tag": "I L high threshold"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 567,
- "tag": "Ion Channel Kinetics"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 740,
- "tag": "Na/K pump"
- },
- {
- "id": 787,
- "tag": "Pathophysiology"
- },
- {
- "id": 741,
- "tag": "Sodium pump"
- },
- {
- "id": 1108,
- "tag": "ModelDB:79461"
- }
- ],
- "timestamp_created": "2024-01-11 15:22:25.892073+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/79461",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "638": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 638,
- "name": "FS Striatal interneuron: K currents solve signal-to-noise problems (Kotaleski et al 2006)",
- "repository_type": "github",
- "summary": "... We show that a transient\r\npotassium (KA) current allows the Fast Spiking (FS) interneuron to strike a balance\r\nbetween sensitivity to correlated input and robustness to noise,\r\nthereby increasing its signal-to-noise ratio (SNR). First, a compartmental\r\nFS neuron model was created to match experimental data from\r\nstriatal FS interneurons in cortex\u2013striatum\u2013substantia nigra organotypic\r\ncultures. Densities of sodium, delayed rectifier, and KA channels\r\nwere optimized to replicate responses to somatic current injection.\r\nSpontaneous AMPA and GABA synaptic currents were\r\nadjusted to the experimentally measured amplitude, rise time, and\r\ninterevent interval histograms. Second, two additional adjustments\r\nwere required to emulate the remaining experimental observations.\r\nGABA channels were localized closer to the soma than AMPA\r\nchannels to match the synaptic population reversal potential. Correlation\r\namong inputs was required to produce the observed firing rate\r\nduring up-states. In this final model, KA channels were essential for\r\nsuppressing down-state spikes while allowing reliable spike generation\r\nduring up-states. ... Our results suggest that KA\r\nchannels allow FS interneurons to operate without a decrease in SNR\r\nduring conditions of increased dopamine, as occurs in response to\r\nreward or anticipated reward. See paper for more and details.",
- "tags": [
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 600,
- "tag": "GENESIS"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 567,
- "tag": "Ion Channel Kinetics"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 568,
- "tag": "Parameter Fitting"
- },
- {
- "id": 801,
- "tag": "Parkinson's"
- },
- {
- "id": 1109,
- "tag": "ModelDB:79465"
- }
- ],
- "timestamp_created": "2024-01-11 15:22:26.460855+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/79465",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "639": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 639,
- "name": "Differences between type A and B photoreceptors (Blackwell 2006)",
- "repository_type": "github",
- "summary": "In Hermissenda crassicornis, the memory of light associated with turbulence\r\nis stored as changes in intrinsic and synaptic currents in both\r\ntype A and type B photoreceptors. These photoreceptor types exhibit\r\nqualitatively different responses to light and current injection, and\r\nthese differences shape the spatiotemporal firing patterns that control\r\nbehavior. Thus the objective of the study was to identify the mechanisms\r\nunderlying these differences. The approach was to develop a\r\ntype B model that reproduced characteristics of type B photoreceptors\r\nrecorded in vitro, and then to create a type A model by modifying a\r\nselect number of ionic currents. Comparison of type A models with\r\ncharacteristics of type A photoreceptors recorded in vitro revealed that\r\ntype A and type B photoreceptors have five main differences, three\r\nthat have been characterized experimentally and two that constitute\r\nhypotheses to be tested with experiments in the future. See paper for more and details.",
- "tags": [
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 774,
- "tag": "Chemesis"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 575,
- "tag": "I T low threshold"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 729,
- "tag": "Invertebrate"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1110,
- "tag": "ModelDB:79471"
- }
- ],
- "timestamp_created": "2024-01-11 15:22:26.947840+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/79471",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "640": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 640,
- "name": "Dynamic dopamine modulation in the basal ganglia: Learning in Parkinson (Frank et al 2004,2005)",
- "repository_type": "github",
- "summary": "See README file for all info on how to run models under different tasks and simulated Parkinson's and medication conditions.",
- "tags": [
- {
- "id": 771,
- "tag": "Action Selection/Decision Making"
- },
- {
- "id": 807,
- "tag": "Emergent/PDPplusplus"
- },
- {
- "id": 808,
- "tag": "Hebbian plasticity"
- },
- {
- "id": 780,
- "tag": "I Cl,Ca"
- },
- {
- "id": 591,
- "tag": "I K,leak"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 801,
- "tag": "Parkinson's"
- },
- {
- "id": 787,
- "tag": "Pathophysiology"
- },
- {
- "id": 791,
- "tag": "Rate-coding model neurons"
- },
- {
- "id": 809,
- "tag": "Reinforcement Learning"
- },
- {
- "id": 569,
- "tag": "Simplified Models"
- },
- {
- "id": 725,
- "tag": "Synaptic Plasticity"
- },
- {
- "id": 1111,
- "tag": "ModelDB:79488"
- }
- ],
- "timestamp_created": "2024-01-11 15:23:48.822874+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/79488",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "641": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 641,
- "name": "Cerebellar purkinje cell: interacting Kv3 and Na currents influence firing (Akemann, Knopfel 2006)",
- "repository_type": "github",
- "summary": "Purkinje neurons spontaneously generate action potentials in the absence of synaptic drive and thereby exert a tonic, yet plastic, input to their target cells in the deep cerebellar nuclei. Purkinje neurons express two ionic currents with biophysical properties that are specialized for high-frequency firing: resurgent sodium currents and potassium currents mediated by Kv3.3. Numerical simulations indicated that Kv3.3 increases the spontaneous firing rate via cooperation with resurgent sodium currents. We conclude that the rate of spontaneous action potential firing of Purkinje neurons is controlled by the interaction of Kv3.3 potassium currents and resurgent sodium currents. See paper for more and details.",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 572,
- "tag": "Calcium dynamics"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 567,
- "tag": "Ion Channel Kinetics"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 1112,
- "tag": "ModelDB:80769"
- }
- ],
- "timestamp_created": "2024-01-11 15:23:49.444066+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/80769",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "642": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 642,
- "name": "Ih levels roles in bursting and regular-spiking subiculum pyramidal neurons (van Welie et al 2006)",
- "repository_type": "github",
- "summary": "Pyramidal neurons in the subiculum typically display either bursting\r\nor regular-spiking behavior. ... Here we report that bursting neurons\r\nposses a hyperpolarization-activated cation current (Ih) that is\r\ntwo-fold larger (conductance: 5.3 \u00c2\u00b1 0.5 nS) than in regularspiking\r\nneurons (2.2 \u00c2\u00b1 0.6 nS), while Ih exhibits similar voltage-dependent\r\nand kinetic properties in both classes of neurons. Bursting and\r\nregular-spiking neurons display similar morphology. The difference in\r\nIh between the two classes is not responsible for the distinct firing\r\npatterns, since neither pharmacological blockade of Ih nor enhancement\r\nof Ih using a dynamic clamp affects the qualitative firing\r\npatterns. Instead, the difference in Ih between bursting and\r\nregular-spiking neurons determines the temporal integration of evoked\r\nsynaptic input from the CA1 area. In response to 50 Hz stimulation,\r\nbursting neurons, with a large Ih, show ~50% less temporal summation\r\nthan regular-spiking neurons. ... A computer simulation model of a\r\nsubicular neuron with the properties of either a bursting or a\r\nregular-spiking neuron confirmed the pivotal role of Ih in temporal\r\nintegration of synaptic input. These data suggest that in the\r\nsubicular network, bursting neurons are better suited to discriminate\r\nthe content of high frequency input, such as that occurring during\r\ngamma oscillations, compared to regular-spiking neurons. See paper for more and details.\r\n",
- "tags": [
- {
- "id": 595,
- "tag": "Coincidence Detection"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 596,
- "tag": "Synaptic Integration"
- },
- {
- "id": 1113,
- "tag": "ModelDB:82364"
- }
- ],
- "timestamp_created": "2024-01-11 15:23:49.935286+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/82364",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "643": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 643,
- "name": "Information-processing in lamina-specific cortical microcircuits (Haeusler and Maass 2006)",
- "repository_type": "github",
- "summary": "A major challenge for computational neuroscience is to understand\r\nthe computational function of lamina-specific synaptic connection\r\npatterns in stereotypical cortical microcircuits.We approach this problem by studying ...\r\nthe dynamical system defined by more realistic cortical microcircuit\r\nmodels as a whole and by investigating the influence that its\r\nlaminar structure has on the transmission and fusion of information\r\nwithin this dynamical system. The circuit models that we examine\r\nconsist of Hodgkin--Huxley neurons with dynamic synapses... We investigate to what\r\nextent this cortical microcircuit template supports the accumulation\r\nand fusion of information contained in generic spike inputs into\r\nlayer 4 and layers 2/3 and how well it makes this information\r\naccessible to projection neurons in layers 2/3 and layer 5. ... We conclude that computer simulations\r\nof detailed lamina-specific cortical microcircuit models\r\nprovide new insight into computational consequences of anatomical\r\nand physiological data. See paper for more and details.",
- "tags": [
- {
- "id": 810,
- "tag": "CSIM (web link to model)"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 569,
- "tag": "Simplified Models"
- },
- {
- "id": 720,
- "tag": "Temporal Pattern Generation"
- },
- {
- "id": 1114,
- "tag": "ModelDB:82385"
- }
- ],
- "timestamp_created": "2024-01-11 15:23:50.464063+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/82385",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "644": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 644,
- "name": "Computational aspects of feedback in neural circuits (Maass et al 2006)",
- "repository_type": "github",
- "summary": "It had previously been shown that generic cortical microcircuit models\r\ncan perform complex real-time computations on continuous input\r\nstreams, provided that these computations can be carried out with a\r\nrapidly fading memory. We investigate ... the computational\r\ncapability of such circuits in the more realistic case where not only\r\nreadout neurons, but in addition a few neurons within the circuit have\r\nbeen trained for specific tasks. This is essentially equivalent to\r\nthe case where the output of trained readout neurons is fed back into\r\nthe circuit. We show that this new model overcomes the limitation of\r\na rapidly fading memory. In fact, we prove that in the idealized case\r\nwithout noise it can carry out any conceiv- able digital or analog\r\ncomputation on time-varying inputs. But even with noise the resulting\r\ncomputational model can perform a large class of biologically relevant\r\nreal-time computations that require a non-fading memory. ... In\r\nparticular we show that ... generic cortical microcircuits with\r\nfeedback provide a new model for working memory that is consistent\r\nwith a large set of biological constraints. See paper for more and details.",
- "tags": [
- {
- "id": 810,
- "tag": "CSIM (web link to model)"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 580,
- "tag": "I M"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 569,
- "tag": "Simplified Models"
- },
- {
- "id": 720,
- "tag": "Temporal Pattern Generation"
- },
- {
- "id": 1115,
- "tag": "ModelDB:82392"
- }
- ],
- "timestamp_created": "2024-01-11 15:23:50.981268+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/82392",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "645": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 645,
- "name": "High dimensional dynamics and low dimensional readouts in neural microcircuits (Haeusler et al 2006)",
- "repository_type": "github",
- "summary": "We investigate generic models for cortical microcircuits,\r\ni.e. recurrent circuits of integrate-and fire neurons with dynamic\r\nsynapses. These complex dynamic systems subserve the amazing\r\ninformation processing capabilities of the cortex, but are at the\r\npresent time very little understood. We analyze the transient dynamics\r\nof models for neural microcircuits from the point of view of one or\r\ntwo readout neurons that collapse the high dimensional transient\r\ndynamics of a neural circuit into a 1- or 2--dimensional output\r\nstream. See paper for more and details.\r\n",
- "tags": [
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 718,
- "tag": "Attractor Neural Network"
- },
- {
- "id": 810,
- "tag": "CSIM (web link to model)"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 569,
- "tag": "Simplified Models"
- },
- {
- "id": 1116,
- "tag": "ModelDB:82394"
- }
- ],
- "timestamp_created": "2024-01-11 15:23:51.443888+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/82394",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "646": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 646,
- "name": "Hysteresis in voltage gating of HCN channels (Elinder et al 2006, Mannikko et al 2005)",
- "repository_type": "github",
- "summary": "We found that HCN2 and HCN4 channels\r\nexpressed in oocytes from the frog Xenopus laevis do not display the\r\nactivation kinetic changes that we (previously) observed in spHCN and\r\nHCN1. However, HCN2 and HCN4 channels display changes in their tail\r\ncurrents, suggesting that these channels also undergo mode shifts and\r\nthat the conformational changes underlying the mode shifts are due to\r\nconserved aspects of HCN channels. With computer modelling, we show\r\nthat in channels with relatively slow opening kinetics and fast\r\nmode-shift transitions, such as HCN2 and HCN4 channels, the mode shift\r\neffects are not readily observable, except in the tail\r\nkinetics. Computer simulations of sino-atrial node action potentials\r\nsuggest that the HCN2 channel, together with the HCN1 channel, are\r\nimportant regulators of the heart firing frequency and that the mode\r\nshift is an important property to prevent arrhythmic firing. We\r\nconclude that although all HCN channels appear to undergo mode shifts\r\n\u2013 and thus may serve to prevent arrhythmic firing\r\n\u2013 it is mainly observable in ionic currents\r\nfrom HCN channels with faster kinetics. See papers for more and details.",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 737,
- "tag": "Heart disease"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 589,
- "tag": "I L high threshold"
- },
- {
- "id": 580,
- "tag": "I M"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 575,
- "tag": "I T low threshold"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 567,
- "tag": "Ion Channel Kinetics"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 761,
- "tag": "QBasic/QuickBasic/Turbo Basic/VBA"
- },
- {
- "id": 1117,
- "tag": "ModelDB:82758"
- }
- ],
- "timestamp_created": "2024-01-11 15:23:52.004498+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/82758",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "647": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 647,
- "name": "Irregular spiking in NMDA-driven prefrontal cortex neurons (Durstewitz and Gabriel 2006)",
- "repository_type": "github",
- "summary": "Slow N-Methyl-D-aspartic acid (NMDA) synaptic currents are assumed to strongly contribute to the persistently elevated firing rates observed in prefrontal cortex (PFC) during working memory. During persistent activity, spiking of many neurons is highly irregular. ... The highest interspike-interval (ISI) variability occurred in a transition regime where the subthreshold membrane potential distribution shifts from mono- to bimodality, ... Predictability within irregular ISI series was significantly higher than expected from a noise-driven linear process, indicating that it might best be described through complex (potentially chaotic) nonlinear deterministic processes. Accordingly, the phenomena observed in vitro could be reproduced in purely deterministic biophysical model neurons. High spiking irregularity in these models emerged within a chaotic, close-to-bifurcation regime characterized by a shift of the membrane potential distribution from mono- to bimodality and by similar ISI return maps as observed in vitro. ... NMDA-induced irregular dynamics may have important implications for computational processes during working memory and neural coding.",
- "tags": [
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 804,
- "tag": "Bifurcation"
- },
- {
- "id": 572,
- "tag": "Calcium dynamics"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 589,
- "tag": "I L high threshold"
- },
- {
- "id": 739,
- "tag": "I Na,p"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 794,
- "tag": "Working memory"
- },
- {
- "id": 1118,
- "tag": "ModelDB:82784"
- }
- ],
- "timestamp_created": "2024-01-11 15:23:52.511319+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/82784",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "648": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 648,
- "name": "Neocortical pyramidal neuron: deep; effects of dopamine (Durstewitz et al 2000)",
- "repository_type": "github",
- "summary": "\"... Simulated dopamine strongly enhanced high, delay-type activity but not low, spontaneous activity in the model network. Furthermore the strength of an afferent stimulation needed to disrupt delay-type activity increased with the magnitude of the dopamine-induced shifts in network parameters, making the currently active representation much more stable. Stability could be increased by dopamine-induced enhancements of the persistent Na(+) and N-methyl-D-aspartate (NMDA) conductances. Stability also was enhanced by a reduction in AMPA conductances. The increase in GABA(A) conductances that occurs after stimulation of dopaminergic D1 receptors was necessary in this context to prevent uncontrolled, spontaneous switches into high-activity states (i.e., spontaneous activation of task-irrelevant representations). In conclusion, the dopamine-induced changes in the biophysical properties of intrinsic ionic and synaptic conductances conjointly acted to highly increase stability of activated representations in PFC networks and at the same time retain control over network behavior and thus preserve its ability to adequately respond to task-related stimuli. ...\" See paper and references for more and details.",
- "tags": [
- {
- "id": 572,
- "tag": "Calcium dynamics"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 589,
- "tag": "I L high threshold"
- },
- {
- "id": 739,
- "tag": "I Na,p"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 1119,
- "tag": "ModelDB:82849"
- }
- ],
- "timestamp_created": "2024-01-11 15:23:53.028094+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/82849",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "649": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 649,
- "name": "Distributed computing tool for NEURON, NEURONPM (screensaver) (Calin-Jageman and Katz 2006)",
- "repository_type": "github",
- "summary": "\"... To lower the barrier for large-scale model analysis, we have developedNeuronPM,\r\na client/server application that creates a \u201cscreen-saver\u201d cluster\r\nfor running simulations in NEURON (Hines & Carnevale, 1997). ... The NeuronPM client is\r\na Windows-based screen saver, and the NeuronPM server can be hosted\r\non any Apache/PHP/MySQL server. ... Administrative\r\npanels make it simple to upload model files, define the parameters and\r\nconditions to vary, and then monitor client status and work progress.\r\nNeuronPM is open-source freeware and is available for download at\r\nhttp://neuronpm.homeip.net. ...\"",
- "tags": [
- {
- "id": 756,
- "tag": "Methods"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 811,
- "tag": "NEURONPM (web link to tool)"
- },
- {
- "id": 1120,
- "tag": "ModelDB:82891"
- }
- ],
- "timestamp_created": "2024-01-11 15:23:53.489836+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/82891",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "650": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 650,
- "name": "Networks of spiking neurons: a review of tools and strategies (Brette et al. 2007)",
- "repository_type": "github",
- "summary": "This package provides a series of codes that simulate networks of spiking neurons (excitatory and inhibitory, integrate-and-fire or Hodgkin-Huxley type, current-based or conductance-based synapses; some of them are event-based). The same networks are implemented in different simulators (NEURON, GENESIS, NEST, NCS, CSIM, XPP, SPLIT, MVAspike; there is also a couple of implementations in SciLab and C++).\r\nThe codes included in this package are benchmark simulations; see\r\nthe associated review paper (Brette et al. 2007). The \r\nmain goal is to provide a series of benchmark simulations of\r\nnetworks of spiking neurons, and demonstrate how these are implemented in the\r\ndifferent simulators overviewed in the paper. See also details in the\r\nenclosed file Appendix2.pdf, which describes these different \r\nbenchmarks. Some of these benchmarks were based on the \r\nVogels-Abbott model (Vogels TP and Abbott LF 2005).\r\n",
- "tags": [
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 645,
- "tag": "Brian"
- },
- {
- "id": 755,
- "tag": "C or Cplusplus program"
- },
- {
- "id": 812,
- "tag": "CSIM"
- },
- {
- "id": 600,
- "tag": "GENESIS"
- },
- {
- "id": 813,
- "tag": "MVASpike"
- },
- {
- "id": 756,
- "tag": "Methods"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 814,
- "tag": "NCS"
- },
- {
- "id": 611,
- "tag": "NEST"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 714,
- "tag": "PyNN"
- },
- {
- "id": 620,
- "tag": "Python"
- },
- {
- "id": 815,
- "tag": "SPLIT"
- },
- {
- "id": 816,
- "tag": "SciLab"
- },
- {
- "id": 759,
- "tag": "XPPAUT"
- },
- {
- "id": 1121,
- "tag": "ModelDB:83319"
- }
- ],
- "timestamp_created": "2024-01-11 15:23:54.017395+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/83319",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "651": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 651,
- "name": "A simulation method for the firing sequences of motor units (Jiang et al 2006)",
- "repository_type": "github",
- "summary": "\" ... a novel model based on the Hodgkin\u2013Huxley (HH) system is proposed, which has the ability to simulate\r\nthe complex neurodynamics of the firing sequences of motor neurons. The model is presented at the cellular level and network level,\r\nand some simulation results from a simple 3-neuron network are presented to demonstrate its applications.\" See paper for more and details.",
- "tags": [
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 569,
- "tag": "Simplified Models"
- },
- {
- "id": 1122,
- "tag": "ModelDB:83320"
- }
- ],
- "timestamp_created": "2024-01-11 15:23:54.605074+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/83320",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "652": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 652,
- "name": "Pyramidal neuron coincidence detection tuned by dendritic branching pattern (Schaefer et al 2003)",
- "repository_type": "github",
- "summary": "\"... We examined the relationship between dendritic arborization\r\nand the coupling between somatic and dendritic action potential\r\n(AP) initiation sites in layer 5 (L5) neocortical pyramidal neurons.\r\nCoupling was defined as the relative reduction in threshold for\r\ninitiation of a dendritic calcium AP due to a coincident\r\nback-propagating AP. Simulations based on reconstructions of\r\nbiocytin-filled cells showed that addition of oblique branches of the\r\nmain apical dendrite in close proximity to the soma (d < 140 um)\r\nincreases the coupling between the apical and axosomatic AP initiation\r\nzones, whereas incorporation of distal branches decreases\r\ncoupling. ... We conclude that variation in dendritic arborization may\r\nbe a key determinant of variability in coupling (49+-17%; range\r\n19-83%; n = 37) and is likely to outweigh the contribution made by\r\nvariations in active membrane properties. Thus coincidence detection\r\nof inputs arriving from different cortical layers is strongly\r\nregulated by differences in dendritic arborization.\"",
- "tags": [
- {
- "id": 727,
- "tag": "Action Potential Initiation"
- },
- {
- "id": 595,
- "tag": "Coincidence Detection"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 580,
- "tag": "I M"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 1123,
- "tag": "ModelDB:83344"
- }
- ],
- "timestamp_created": "2024-01-11 15:23:55.089373+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/83344",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "653": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 653,
- "name": "Homosynaptic plasticity in the tail withdrawal circuit (TWC) of Aplysia (Baxter and Byrne 2006)",
- "repository_type": "github",
- "summary": "The tail-withdrawal circuit of Aplysia provides a useful model system for investigating synaptic dynamics. Sensory neurons within the circuit manifest several forms of synaptic plasticity. Here, we developed a model of the circuit and investigated the ways in which depression (DEP) and potentiation (POT) contributed to information processing. DEP limited the amount of motor neuron activity that could be elicited by the monosynaptic pathway alone. POT within the monosynaptic pathway did not compensate for DEP. There was, however, a synergistic interaction between POT and the polysynaptic pathway. This synergism extended the dynamic range of the network, and the interplay between DEP and POT made the circuit respond preferentially to long-duration, low-frequency inputs.",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 722,
- "tag": "Depression"
- },
- {
- "id": 723,
- "tag": "Facilitation"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 721,
- "tag": "I N"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 760,
- "tag": "Post-Tetanic Potentiation"
- },
- {
- "id": 757,
- "tag": "SNNAP"
- },
- {
- "id": 758,
- "tag": "Sensory processing"
- },
- {
- "id": 724,
- "tag": "Short-term Synaptic Plasticity"
- },
- {
- "id": 725,
- "tag": "Synaptic Plasticity"
- },
- {
- "id": 586,
- "tag": "Synchronization"
- },
- {
- "id": 1124,
- "tag": "ModelDB:83472"
- }
- ],
- "timestamp_created": "2024-01-11 15:25:22.682252+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/83472",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "654": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 654,
- "name": "INa and IKv4.3 heterogeneity in canine LV myocytes (Flaim et al 2006)",
- "repository_type": "github",
- "summary": "\"The roles of sustained components of INa and IKv43 in shaping the\r\naction potentials (AP) of myocytes isolated from the canine left\r\nventricle (LV) have not been studied in detail. Here we investigate\r\nthe hypothesis that these two currents can contribute substantially to\r\nheterogeneity of early repolarization and arrhythmic\r\nrisk.... The resulting simulations illustrate ways in which KChIP2- and\r\nCa2+- dependent control of IKv43 can result in a sustained outward\r\ncurrent that can neutralize INaL in a rate- and myocyte\r\nsubtype-dependent manner. Both these currents appear to play\r\nsignificant roles in modulating AP duration and rate dependence in\r\nmidmyocardial myocytes. ... By design, these models allow upward\r\nintegration into organ models or may be used as a basis for further\r\ninvestigations into cellular heterogeneities.\" See paper for more\r\nand details.",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 737,
- "tag": "Heart disease"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 817,
- "tag": "I_Na,Ca"
- },
- {
- "id": 818,
- "tag": "I_SERCA"
- },
- {
- "id": 567,
- "tag": "Ion Channel Kinetics"
- },
- {
- "id": 819,
- "tag": "Late Na"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 748,
- "tag": "Markov-type model"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 738,
- "tag": "Na/Ca exchanger"
- },
- {
- "id": 740,
- "tag": "Na/K pump"
- },
- {
- "id": 741,
- "tag": "Sodium pump"
- },
- {
- "id": 1125,
- "tag": "ModelDB:83491"
- }
- ],
- "timestamp_created": "2024-01-11 15:25:23.268454+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/83491",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "655": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 655,
- "name": "Contibutions of input and history to motoneuron output (Powers et al 2005)",
- "repository_type": "github",
- "summary": "\"The present study presents results based\r\non recordings of noise-driven discharge in rat hypoglossal motoneurones ... First, we show that the hyperpolarizing trough is larger in Average Current Trajectories (ACTs)\r\ncalculated from spikes preceded by long interspike intervals, and minimal or absent in those\r\nbased on short interspike intervals. Second, we show that the trough is present for ACTs\r\ncalculated from the discharge of a threshold-crossing neurone model with a postspike after-\r\nhyperpolarization (AHP), but absent from those calculated from the discharge of a model\r\nwithout an AHP. We show that it is possible to represent noise-driven discharge using a\r\ntwo-component linear model that predicts discharge probability based on the sum of a feedback\r\nkernel and a stimulus kernel. The feedback kernel reflects the influence of prior discharge\r\nmediated by the AHP, and it increases in amplitude when AHP amplitude is increased by\r\npharmacological manipulations. Finally, we show that the predictions of this model are virtually\r\nidentical to those based on the first-order Wiener kernel. This suggests that the Wiener kernel\r\nderived from standard white-noise analysis of noise-driven discharge in neurones actually\r\nreflect the effects of both stimulus and discharge history.\" See paper for more and details.",
- "tags": [
- {
- "id": 820,
- "tag": "IGOR Pro"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 569,
- "tag": "Simplified Models"
- },
- {
- "id": 1126,
- "tag": "ModelDB:83508"
- }
- ],
- "timestamp_created": "2024-01-11 15:25:23.736536+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/83508",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "656": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 656,
- "name": "Prefrontal cortical mechanisms for goal-directed behavior (Hasselmo 2005)",
- "repository_type": "github",
- "summary": "\".. a model of prefrontal cortex function emphasizing\r\nthe influence of goal-related activity on the choice\r\nof the next motor output. ...\r\nDifferent neocortical minicolumns represent distinct sensory\r\ninput states and distinct motor output actions. The dynamics\r\nof each minicolumn include separate phases of encoding and\r\nretrieval. During encoding, strengthening of excitatory connections\r\nforms forward and reverse associations between each\r\nstate, the following action, and a subsequent state, which\r\nmay include reward. During retrieval, activity spreads from\r\nreward states throughout the network. The interaction of this\r\nspreading activity with a specific input state directs selection of\r\nthe next appropriate action. Simulations demonstrate how\r\nthese mechanisms can guide performance in a range of goal directed\r\ntasks, and provide a functional framework for some\r\nof the neuronal responses previously observed in the medial\r\nprefrontal cortex during performance of spatial memory tasks\r\nin rats.\"",
- "tags": [
- {
- "id": 767,
- "tag": "MATLAB (web link to model)"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 809,
- "tag": "Reinforcement Learning"
- },
- {
- "id": 569,
- "tag": "Simplified Models"
- },
- {
- "id": 1127,
- "tag": "ModelDB:83512"
- }
- ],
- "timestamp_created": "2024-01-11 15:25:24.294702+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/83512",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "657": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 657,
- "name": "A reinforcement learning example (Sutton and Barto 1998)",
- "repository_type": "github",
- "summary": "This MATLAB script demonstrates an example of reinforcement learning\r\nfunctions guiding the movements of an agent (a black square) in a\r\ngridworld environment. See at the top of the matlab script and the book for more details.\r\n",
- "tags": [
- {
- "id": 767,
- "tag": "MATLAB (web link to model)"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 809,
- "tag": "Reinforcement Learning"
- },
- {
- "id": 1128,
- "tag": "ModelDB:83514"
- }
- ],
- "timestamp_created": "2024-01-11 15:25:24.761154+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/83514",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "658": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 658,
- "name": "Hippocampal context-dependent retrieval (Hasselmo and Eichenbaum 2005)",
- "repository_type": "github",
- "summary": "\"... The model simulates the context-sensitive firing properties of hippocampal neurons including trial-specific firing during spatial\r\nalternation and trial by trial changes in theta phase precession on a linear track. ...\" See paper for more and details.",
- "tags": [
- {
- "id": 767,
- "tag": "MATLAB (web link to model)"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 809,
- "tag": "Reinforcement Learning"
- },
- {
- "id": 569,
- "tag": "Simplified Models"
- },
- {
- "id": 1129,
- "tag": "ModelDB:83516"
- }
- ],
- "timestamp_created": "2024-01-11 15:25:25.278037+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/83516",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "659": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 659,
- "name": "Fixed point attractor (Hasselmo et al 1995)",
- "repository_type": "github",
- "summary": "\"... In the model, cholinergic suppression of synaptic transmission at excitatory feedback synapses is shown to determine the extent to which activity depends upon new features of the afferent input versus components of previously stored representations. ...\" See paper for more and details. The MATLAB script demonstrates the model of fixed point attractors mediated by excitatory feedback with subtractive inhibition in a continuous firing rate model.\r\n",
- "tags": [
- {
- "id": 718,
- "tag": "Attractor Neural Network"
- },
- {
- "id": 767,
- "tag": "MATLAB (web link to model)"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 809,
- "tag": "Reinforcement Learning"
- },
- {
- "id": 569,
- "tag": "Simplified Models"
- },
- {
- "id": 1130,
- "tag": "ModelDB:83517"
- }
- ],
- "timestamp_created": "2024-01-11 15:25:26.081765+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/83517",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "660": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 660,
- "name": "Ambiguous Encoding and Distorted Perception (Carlson and Kawasaki 2006)",
- "repository_type": "github",
- "summary": "\"... In\r\nthe weakly electric fish Eigenmannia, P- and T-type primary afferent fibers are specialized for encoding the amplitude and phase,\r\nrespectively, of electrosensory stimuli. We used a stimulus estimation technique to quantify the ability of P- and T-units to encode\r\nrandom modulations in amplitude and phase. As expected, P-units exhibited a clear preference for encoding amplitude modulations,\r\nwhereas T-units exhibited a clear preference for encoding phase modulations. Surprisingly, both types of afferents also encoded their\r\nnonpreferred stimulus attribute when it was presented in isolation or when the preferred stimulus attribute was sufficiently weak.\r\nBecause afferent activity can be affected by modulations in either amplitude or phase, it is not possible to unambiguously distinguish\r\nbetween these two stimulus attributes by observing the activity of a single afferent fiber. Simple model neurons with a preference for\r\nencoding either amplitude or phase also encoded their nonpreferred stimulus attribute when it was presented in isolation, suggesting that\r\nsuch ambiguity is unavoidable. ... \" See paper for more and details.",
- "tags": [
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 821,
- "tag": "Sensory coding"
- },
- {
- "id": 1131,
- "tag": "ModelDB:83520"
- }
- ],
- "timestamp_created": "2024-01-11 15:25:26.614386+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/83520",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "661": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 661,
- "name": "Combination sensitivity and active conductances (Carlson and Kawasaki 2006)",
- "repository_type": "github",
- "summary": "\"... The weakly electric fish Gymnarchus discriminates the\r\nsign of the frequency difference (Df) between a neighbor\u2019s electric\r\norgan discharge (EOD) and its own EOD by comparing temporal\r\npatterns of amplitude modulation (AM) and phase modulation (PM).\r\nSign-selective neurons in the midbrain respond preferentially to either\r\npositive frequency differences (Df >0 selective) or negative frequency\r\ndifferences (Df <0 selective). To study the mechanisms of\r\ncombination sensitivity, we made whole cell intracellular recordings\r\nfrom sign-selective midbrain neurons in vivo and recorded postsynaptic\r\npotential (PSP) responses to AM, PM, Df >0, and Df <0.\r\n... Responses to the nonpreferred\r\nsign of Df, but not the preferred sign of Df, were substantially weaker\r\nthan linear predictions, causing a significant increase in the actual\r\ndegree of sign selectivity. By using various levels of current clamp\r\nand comparing our results to simple models of synaptic integration,\r\nwe demonstrate that this decreased response to the nonpreferred sign\r\nof Df is caused by a reduction in voltage-dependent excitatory\r\nconductances. This finding reveals that nonlinear decoders, in the\r\nform of voltage-dependent conductances, can enhance the selectivity\r\nof single neurons for particular combinations of stimulus attributes.\" See paper for more and details.",
- "tags": [
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 569,
- "tag": "Simplified Models"
- },
- {
- "id": 1132,
- "tag": "ModelDB:83521"
- }
- ],
- "timestamp_created": "2024-01-11 15:25:27.094532+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/83521",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "662": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 662,
- "name": "Subthreshold inact. of K channels modulates APs in bitufted interneurons (Korngreen et al 2005)",
- "repository_type": "github",
- "summary": "... In this study we show that in bitufted interneurones\r\nfrom layer 2/3 of the somatosensory cortex, the height and width of APs recorded at the\r\nsoma are sensitive to changes in the resting membrane potential, suggesting subthreshold\r\nactivity of voltage-gated conductances. Attributes of K+ currents examined in nucleated\r\npatches revealed a fast subthreshold-inactivating K+ conductance (Kf ) and a slow\r\nsuprathreshold-inactivating K+ conductance (Ks ). Simulations of these K+ conductances,\r\nincorporated into a Hodgkin\u2013Huxley-type model, suggested that during a single AP or during\r\nlow frequency trains of APs, subthreshold inactivation of Kf was the primary modulator of AP\r\nshape, whereas during trains of APs the shape was governed to a larger degree by Ks resulting\r\nin the generation of smaller and broader APs. ... Compartmental simulation\r\nof the back-propagating AP suggested a mechanism for the modulation of the back-propagating\r\nAP height and width by subthreshold activation of Kf . We speculate that this signal may\r\nmodulate retrograde GABA release and consequently depression of synaptic efficacy of excitatory\r\ninput from neighbouring pyramidal neurones.",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 567,
- "tag": "Ion Channel Kinetics"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 1133,
- "tag": "ModelDB:83523"
- }
- ],
- "timestamp_created": "2024-01-11 15:25:27.573455+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/83523",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "663": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 663,
- "name": "Cortex learning models (Weber at al. 2006, Weber and Triesch, 2006, Weber and Wermter 2006/7)",
- "repository_type": "github",
- "summary": "A simulator and the configuration files for three publications are\r\nprovided. First, \"A hybrid generative and predictive model of the motor\r\ncortex\" (Weber at al. 2006) which uses reinforcement learning to set up a\r\ntoy action scheme, then uses unsupervised learning to \"copy\" the learnt\r\naction, and an attractor network to predict the hidden code of the\r\nunsupervised network. Second, \"A Self-Organizing Map of Sigma-Pi Units\"\r\n(Weber and Wermter 2006/7) learns frame of reference transformations on\r\npopulation codes in an unsupervised manner. Third, \"A possible\r\nrepresentation of reward in the learning of saccades\" (Weber and Triesch,\r\n2006) implements saccade learning with two possible learning schemes for\r\nhorizontal and vertical saccades, respectively.",
- "tags": [
- {
- "id": 718,
- "tag": "Attractor Neural Network"
- },
- {
- "id": 755,
- "tag": "C or Cplusplus program"
- },
- {
- "id": 808,
- "tag": "Hebbian plasticity"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 588,
- "tag": "Olfaction"
- },
- {
- "id": 791,
- "tag": "Rate-coding model neurons"
- },
- {
- "id": 809,
- "tag": "Reinforcement Learning"
- },
- {
- "id": 803,
- "tag": "Unsupervised Learning"
- },
- {
- "id": 822,
- "tag": "Winner-take-all"
- },
- {
- "id": 1134,
- "tag": "ModelDB:83528"
- }
- ],
- "timestamp_created": "2024-01-11 15:25:28.045294+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/83528",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "664": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 664,
- "name": "Regulation of the firing pattern in dopamine neurons (Komendantov et al 2004)",
- "repository_type": "github",
- "summary": "Midbrain dopaminergic (DA) neurons in vivo exhibit two major firing patterns: single-spike firing and burst firing. The firing pattern expressed is dependent on both the intrinsic properties of the neurons and their excitatory and inhibitory synaptic inputs. Experimental data suggest that the activation of NMDA and GABAA receptors is crucial contributor to the initiation and suppression of burst firing, respectively, and that blocking calcium-activated potassium channels can facilitate burst firing. This multi-compartmental model of a DA neuron with a branching structure was developed and calibrated based on in vitro experimental data to explore the effects of different levels of activation of NMDA and GABAA receptors as well as the modulation of the SK current on the firing activity.",
- "tags": [
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 566,
- "tag": "Bursting"
- },
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 740,
- "tag": "Na/K pump"
- },
- {
- "id": 741,
- "tag": "Sodium pump"
- },
- {
- "id": 1135,
- "tag": "ModelDB:83547"
- }
- ],
- "timestamp_created": "2024-01-11 15:25:28.594563+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/83547",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "665": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 665,
- "name": "Role of active dendrites in rhythmically-firing neurons (Goldberg et al 2006)",
- "repository_type": "github",
- "summary": "\"The responsiveness of rhythmically-firing neurons to synaptic inputs is characterized by their phase response curve (PRC), which relates how weak somatic perturbations affect the timing of the next action potential. The shape of the somatic PRC is an important determinant of collective network dynamics. Here we study theoretically and experimentally the impact of distally-located synapses and dendritic nonlinearities on the synchronization properties of rhythmically firing neurons. Combining the theories of quasi-active cables and phase-coupled oscillators we derive an approximation for the dendritic responsiveness, captured by the neuron's dendritic PRC (dPRC). This closed-form expression indicates that the dPRCs are linearly-filtered versions of the somatic PRC, and that the filter characteristics are determined by the passive and active properties of the dendrite. ... collective dynamics can be qualitatively different depending on the location of the synapse, the neuronal firing rates and the dendritic nonlinearities.\" See paper for more and details.",
- "tags": [
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 823,
- "tag": "Phase Response Curves"
- },
- {
- "id": 596,
- "tag": "Synaptic Integration"
- },
- {
- "id": 586,
- "tag": "Synchronization"
- },
- {
- "id": 759,
- "tag": "XPPAUT"
- },
- {
- "id": 1136,
- "tag": "ModelDB:83558"
- }
- ],
- "timestamp_created": "2024-01-11 15:25:29.262798+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/83558",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "666": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 666,
- "name": "Spiking neuron model of the basal ganglia (Humphries et al 2006)",
- "repository_type": "github",
- "summary": "A spiking neuron model of the basal ganglia (BG) circuit (striatum, STN, GP, SNr). Includes: parallel anatomical channels; tonic dopamine; dopamine receptors in striatum, STN, and GP; burst-firing in STN; GABAa, AMPA, and NMDA currents; effects of synaptic location. Model demonstrates selection and switching of input signals. Replicates experimental data on changes in slow-wave (<1 Hz) and gamma-band oscillations within BG nuclei following lesions and pharmacological manipulations.",
- "tags": [
- {
- "id": 771,
- "tag": "Action Selection/Decision Making"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 801,
- "tag": "Parkinson's"
- },
- {
- "id": 573,
- "tag": "Rebound firing"
- },
- {
- "id": 592,
- "tag": "Sleep"
- },
- {
- "id": 1137,
- "tag": "ModelDB:83559"
- }
- ],
- "timestamp_created": "2024-01-11 15:25:29.965236+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/83559",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "667": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 667,
- "name": "Population-level model of the basal ganglia and action selection (Gurney et al 2001, 2004)",
- "repository_type": "github",
- "summary": "We proposed a new functional architecture for the basal ganglia (BG) based on the premise that these brain structures play a central role in behavioural action selection. The papers quantitatively describes the properties of the model using analysis and simulation. In the first paper, we show that the decomposition of the BG into selection and control pathways is supported in several ways. First, several elegant features are exposed--capacity scaling, enhanced selectivity and synergistic dopamine modulation--which might be expected to exist in a well designed action selection mechanism. Second, good matches between model GPe output and GPi and SNr output, and neurophysiological data, have been found. Third, the behaviour of the model as a signal selection mechanism has parallels with some kinds of action selection observed in animals under various levels of dopaminergic modulation.\r\n\r\nIn the second paper, we extend the BG model to include new connections, and show that action selection is maintained. In addition, we provide quantitative measures for defining different forms of selection, and methods for assessing performance changes in computational neuroscience models. \r\n\r\n\r\n",
- "tags": [
- {
- "id": 771,
- "tag": "Action Selection/Decision Making"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 801,
- "tag": "Parkinson's"
- },
- {
- "id": 824,
- "tag": "Simulink"
- },
- {
- "id": 1138,
- "tag": "ModelDB:83560"
- }
- ],
- "timestamp_created": "2024-01-11 15:25:30.509376+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/83560",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "668": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 668,
- "name": "Basal ganglia-thalamocortical loop model of action selection (Humphries and Gurney 2002)",
- "repository_type": "github",
- "summary": "We embed our basal ganglia model into a wider circuit containing the motor thalamocortical loop and thalamic reticular nucleus (TRN). Simulation of this extended model showed that the additions gave five main results which are desirable in a selection/switching mechanism. First, low salience actions (i.e. those with low urgency) could be selected. Second, the range of salience values over which actions could be switched between was increased. Third, the contrast between the selected and non-selected actions was enhanced via improved differentiation of outputs from the BG. Fourth, transient increases in the salience of a non-selected action were prevented from interrupting the ongoing action, unless the transient was of sufficient magnitude. Finally, the selection of the ongoing action persisted when a new closely matched salience action became active. The first result was facilitated by the thalamocortical loop; the rest were dependent on the presence of the TRN. Thus, we conclude that the results are consistent with these structures having clearly defined functions in action selection.",
- "tags": [
- {
- "id": 771,
- "tag": "Action Selection/Decision Making"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 801,
- "tag": "Parkinson's"
- },
- {
- "id": 824,
- "tag": "Simulink"
- },
- {
- "id": 1139,
- "tag": "ModelDB:83562"
- }
- ],
- "timestamp_created": "2024-01-11 15:25:31.045034+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/83562",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "669": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 669,
- "name": "A theory of ongoing activity in V1 (Goldberg et al 2004)",
- "repository_type": "github",
- "summary": "Ongoing spontaneous activity in the cerebral cortex exhibits\r\ncomplex spatiotemporal patterns in the absence of sensory stimuli. To elucidate the nature of\r\nthis ongoing activity, we present a theoretical treatment of two contrasting scenarios of cortical dynamics: (1) fluctuations about a single background state\r\nand (2) wandering among multiple \u201cattractor\u201d states, which\r\nencode a single or several stimulus features.\r\nStudying simplified network rate models of the primary\r\nvisual cortex (V1), we show that the single state scenario\r\nis characterized by fast and high-dimensional\r\nGaussian-like fluctuations, whereas in the multiple\r\nstate scenario the fluctuations are slow, low dimensional,\r\nand highly non-Gaussian. Studying a more realistic model that incorporates correlations in the feedforward input, spatially restricted cortical interactions,\r\nand an experimentally derived layout of pinwheels,\r\nwe show that recent optical-imaging data of ongoing\r\nactivity in V1 are consistent with the presence of either\r\na single background state or multiple attractor states\r\nencoding many features.",
- "tags": [
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 588,
- "tag": "Olfaction"
- },
- {
- "id": 791,
- "tag": "Rate-coding model neurons"
- },
- {
- "id": 587,
- "tag": "Spatio-temporal Activity Patterns"
- },
- {
- "id": 759,
- "tag": "XPPAUT"
- },
- {
- "id": 1140,
- "tag": "ModelDB:83570"
- }
- ],
- "timestamp_created": "2024-01-11 15:25:31.561425+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/83570",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "670": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 670,
- "name": "Modeling interactions in Aplysia neuron R15 (Yu et al 2004)",
- "repository_type": "github",
- "summary": "\"The biophysical properties of neuron R15 in Aplysia endow it with the ability to express multiple modes of oscillatory electrical activity, such as beating and bursting. Previous modeling studies examined the ways in which membrane conductances contribute to the electrical activity of R15 and the ways in which extrinsic modulatory inputs alter the membrane conductances by biochemical cascades and influence the electrical activity. The goals of the present study were to examine the ways in which electrical activity influences the biochemical cascades and what dynamical properties emerge from the ongoing interactions between electrical activity and these cascades.\" See paper for more and details.",
- "tags": [
- {
- "id": 727,
- "tag": "Action Potential Initiation"
- },
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 566,
- "tag": "Bursting"
- },
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 730,
- "tag": "I A, slow"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 721,
- "tag": "I N"
- },
- {
- "id": 739,
- "tag": "I Na,p"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 729,
- "tag": "Invertebrate"
- },
- {
- "id": 567,
- "tag": "Ion Channel Kinetics"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 759,
- "tag": "XPPAUT"
- },
- {
- "id": 1141,
- "tag": "ModelDB:83575"
- }
- ],
- "timestamp_created": "2024-01-11 15:25:32.098583+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/83575",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "671": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 671,
- "name": "Input Fluctuations effects on f-I curves (Arsiero et al. 2007)",
- "repository_type": "github",
- "summary": "\"... We examined in vitro frequency versus current (f-I) relationships of layer 5 (L5) pyramidal cells of the rat medial prefrontal cortex (mPFC) using fluctuating stimuli. ...our results show that mPFC L5 pyramidal neurons retain an increased sensitivity to input fluctuations, whereas their sensitivity to the input mean diminishes to near zero. This implies that the discharge properties of L5 mPFC neurons are well suited to encode input fluctuations rather than input mean in their firing rates, with important consequences for information processing and stability of persistent activity at the network level.\"",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 569,
- "tag": "Simplified Models"
- },
- {
- "id": 777,
- "tag": "Spike Frequency Adaptation"
- },
- {
- "id": 1142,
- "tag": "ModelDB:83590"
- }
- ],
- "timestamp_created": "2024-01-11 15:25:32.592636+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/83590",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "672": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 672,
- "name": "Linking STDP and Dopamine action to solve the distal reward problem (Izhikevich 2007)",
- "repository_type": "github",
- "summary": "\"... How does the brain know what firing patterns of what neurons are responsible for the reward if 1) the patterns are no longer there when the reward arrives and 2) all\r\nneurons and synapses are active during the waiting period to the\r\nreward? Here, we show how the conundrum is resolved by a model network\r\nof cortical spiking neurons with spike-timing-dependent plasticity\r\n(STDP) modulated by dopamine (DA). Although STDP is triggered by\r\nnearly coincident firing patterns on a millisecond timescale, slow\r\nkinetics of subsequent synaptic plasticity is sensitive to changes in\r\nthe extracellular DA concentration during the critical period of a few\r\nseconds. ... This study emphasizes the importance of precise firing\r\npatterns in brain dynamics and suggests how a global diffusive\r\nreinforcement signal in the form of extracellular DA can selectively\r\ninfluence the right synapses at the right time.\" See paper for more and details.",
- "tags": [
- {
- "id": 825,
- "tag": "Learning"
- },
- {
- "id": 749,
- "tag": "Long-term Synaptic Plasticity"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 802,
- "tag": "STDP"
- },
- {
- "id": 725,
- "tag": "Synaptic Plasticity"
- },
- {
- "id": 1143,
- "tag": "ModelDB:84167"
- }
- ],
- "timestamp_created": "2024-01-11 15:25:33.057561+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/84167",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "673": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 673,
- "name": "Extracellular Action Potential Simulations (Gold et al 2007)",
- "repository_type": "github",
- "summary": "This package recreates the the principal experiments described in (Gold, Henze and Koch, 2007) and includes the core code necessary to create your own Extracellular Action Potential Simulations.",
- "tags": [
- {
- "id": 734,
- "tag": "Extracellular Fields"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 1144,
- "tag": "ModelDB:84589"
- }
- ],
- "timestamp_created": "2024-01-11 15:25:33.571872+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/84589",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "674": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 674,
- "name": "Temporal decorrelation by intrinsic cellular dynamics (Wang et al 2003)",
- "repository_type": "github",
- "summary": "\"... Recent investigations in primary visual (V1) cortical neurons have\r\ndemonstrated that adaptation to prolonged changes in stimulus contrast\r\nis mediated in part through intrinsic ionic currents, a Ca2+\r\nactivated K+ current (IKCa) and especially a Na+ activated K+ current\r\n(IKNa). The present study was designed to test the hypothesis that\r\nthe activation of adaptation ionic currents may provide a cellular\r\nmechanism for temporal decorrelation in V1. A conductance-based\r\nneuron model was simulated, which included an IKCa and an IKNa. We\r\nshow that the model neuron reproduces the adaptive behavior of V1\r\nneurons in response to high contrast inputs. ...\". See paper for details and more.",
- "tags": [
- {
- "id": 755,
- "tag": "C or Cplusplus program"
- },
- {
- "id": 572,
- "tag": "Calcium dynamics"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 589,
- "tag": "I L high threshold"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 567,
- "tag": "Ion Channel Kinetics"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 720,
- "tag": "Temporal Pattern Generation"
- },
- {
- "id": 726,
- "tag": "Vision"
- },
- {
- "id": 1145,
- "tag": "ModelDB:84593"
- }
- ],
- "timestamp_created": "2024-01-11 15:25:34.040561+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/84593",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "675": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 675,
- "name": "Synaptic integration of an identified nonspiking interneuron in crayfish (Takashima et al 2006)",
- "repository_type": "github",
- "summary": "This GENESIS simulation shows how a single or compound excitatory synaptic potential evoked by mechanosensory stimulation spreads over the dendrites of the LDS interneuron that is one of the identified nonspiking interneurons in the central nervous system of crayfish Procambarus clarkii. The model is based on physiological experiments carried out by Akira Takashima using single-electrode voltage clamp techniques and also 3-D morphometry of the interneuron carried out by Ryou Hikosaka using confocal laser scanning microscopic techniques. The physiological and morphological studies were coordinated by Masakazu Takahata.",
- "tags": [
- {
- "id": 600,
- "tag": "GENESIS"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 570,
- "tag": "Influence of Dendritic Geometry"
- },
- {
- "id": 729,
- "tag": "Invertebrate"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 596,
- "tag": "Synaptic Integration"
- },
- {
- "id": 1146,
- "tag": "ModelDB:84599"
- }
- ],
- "timestamp_created": "2024-01-11 15:25:34.611145+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/84599",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "676": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 676,
- "name": "Zonisamide-induced inhibition of the firing of APs in hippocampal neurons (Huang et al. 2007)",
- "repository_type": "github",
- "summary": "Zonisamide (ZNS), a synthetic benzisoxazole derivative, has been used as an alternative choice in the treatment of epilepsy with a better efficacy and safety profile. However, little is known regarding the mechanism of ZNS actions on ion currents in neurons. We thus investigated its effect on ion currents in differentiated hippocampal 19-7 cells. The ZNS (30 uM) reversibly increased the amplitude of K+ outward currents and paxilline (1 uM) was effective in suppressing ZNS-induced increase of K+ outward currents. In inside-out configuration, ZNS (30 uM) applied to the intracellular face of the membrane did not alter single-channel conductance; however, it did enhance the activity of large-conductance Ca2+-activated K+ (BKCa) channels primarily by decreasing mean closed time. The EC50 value for ZNS-stimulated BKCa channels was 34 uM. This drug caused a left shift in the activation curve of BKCa channels with no change in the gating charge of these channels. ZNS at a concentration greater than 100 uM also reduced the amplitude of A-type K+ current in these cells. A simulation modeling based on hippocampal CA3 pyramidal neurons (Pinsky-Rinzel model) was also analyzed to investigate the inhibitory effect of ZNS on the firing of simulated action potentials. Taken together, this study suggests that in hippocampal neurons, during the exposure to ZNS, the ZNS-mediated effects on BKCa channels and IA could be one of the ionic mechanisms through which it affects neuronal excitability.",
- "tags": [
- {
- "id": 728,
- "tag": "Axonal Action Potentials"
- },
- {
- "id": 469,
- "tag": "Epilepsy"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 567,
- "tag": "Ion Channel Kinetics"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 759,
- "tag": "XPPAUT"
- },
- {
- "id": 1147,
- "tag": "ModelDB:84606"
- }
- ],
- "timestamp_created": "2024-01-11 15:25:35.093961+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/84606",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "677": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 677,
- "name": "Differential modulation of pattern and rate in a dopamine neuron model (Canavier and Landry 2006)",
- "repository_type": "github",
- "summary": "\"A stylized, symmetric, compartmental model of a dopamine neuron in vivo shows how rate and pattern can be modulated either concurrently or differentially. If two or more parameters in the model are varied concurrently, the baseline firing rate and the extent of bursting become decorrelated, which provides an explanation for the lack of a tight correlation in vivo and is consistent with some independence of the mechanisms that generate baseline firing rates versus bursting. ...\" See paper for more and details.\r\n",
- "tags": [
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 566,
- "tag": "Bursting"
- },
- {
- "id": 572,
- "tag": "Calcium dynamics"
- },
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 589,
- "tag": "I L high threshold"
- },
- {
- "id": 721,
- "tag": "I N"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 575,
- "tag": "I T low threshold"
- },
- {
- "id": 763,
- "tag": "Intrinsic plasticity"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 740,
- "tag": "Na/K pump"
- },
- {
- "id": 741,
- "tag": "Sodium pump"
- },
- {
- "id": 1148,
- "tag": "ModelDB:84612"
- }
- ],
- "timestamp_created": "2024-01-11 15:25:35.587828+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/84612",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "678": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 678,
- "name": "Method for counting motor units in mice (Major et al 2007)",
- "repository_type": "github",
- "summary": "\"... Our goal was to develop an efficient method\r\nto determine the number of motor neurons making functional connections\r\nto muscle in a transgenic mouse model of amyotrophic lateral\r\nsclerosis (ALS). We developed a novel protocol for motor unit\r\nnumber estimation (MUNE) using incremental stimulation. The\r\nmethod involves analysis of twitch waveforms using a new software\r\nprogram, ITS-MUNE, designed for interactive calculation of motor\r\nunit number. The method was validated by testing simulated twitch\r\ndata from a mathematical model of the neuromuscular system. Computer\r\nsimulations followed the same stimulus-response protocol and\r\nproduced waveform data that were indistinguishable from experiments.\r\n... The ITS-MUNE analysis method has the potential to quantitatively\r\nmeasure the progression of motor neuron diseases and therefore the\r\nefficacy of treatments designed to alleviate pathologic processes of\r\nmuscle denervation.\" The software is available for download under the \"ITS-MUNE software\" link at \r\n(see below for links).\"",
- "tags": [
- {
- "id": 767,
- "tag": "MATLAB (web link to model)"
- },
- {
- "id": 756,
- "tag": "Methods"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 787,
- "tag": "Pathophysiology"
- },
- {
- "id": 1149,
- "tag": "ModelDB:84627"
- }
- ],
- "timestamp_created": "2024-01-11 15:25:36.073485+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/84627",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "679": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 679,
- "name": "A cardiac cell simulator (Puglisi and Bers 2001), applied to the QT interval (Busjahn et al 2004)",
- "repository_type": "github",
- "summary": "\"LabHEART is an easy to use program that simulates the cardiac action potential, calcium transient and ionic currents. Key parameters such as ionic concentration, stimulus waveform and channel conductance can easily be changed by a click on an icon or dragging a slider.\r\n\r\nIt is a powerfull tool for teaching and researching cardiac electrophysiology.\"",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 737,
- "tag": "Heart disease"
- },
- {
- "id": 567,
- "tag": "Ion Channel Kinetics"
- },
- {
- "id": 767,
- "tag": "MATLAB (web link to model)"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 720,
- "tag": "Temporal Pattern Generation"
- },
- {
- "id": 732,
- "tag": "Tutorial/Teaching"
- },
- {
- "id": 1150,
- "tag": "ModelDB:84641"
- }
- ],
- "timestamp_created": "2024-01-11 15:25:36.605343+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/84641",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "680": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 680,
- "name": "Squid axon (Hodgkin, Huxley 1952) (LabAXON)",
- "repository_type": "github",
- "summary": "The classic HH model of squid axon membrane implemented in LabAXON. Hodgkin, A.L., Huxley, A.F. (1952)",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 729,
- "tag": "Invertebrate"
- },
- {
- "id": 767,
- "tag": "MATLAB (web link to model)"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1151,
- "tag": "ModelDB:84649"
- }
- ],
- "timestamp_created": "2024-01-11 15:25:37.153253+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/84649",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "681": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 681,
- "name": "Recording from rod bipolar axon terminals in situ (Oltedal et al 2007)",
- "repository_type": "github",
- "summary": "\"... Whole cell\r\nrecordings from axon terminals and cell bodies were used to investigate\r\nthe passive membrane properties of rod bipolar cells and analyzed\r\nwith a two-compartment equivalent electrical circuit model\r\ndeveloped by Mennerick et al. For both terminal- and soma-end\r\nrecordings, capacitive current decays were well fitted by biexponential\r\nfunctions. Computer simulations of simplified models of rod bipolar\r\ncells demonstrated that estimates of the capacitance of the axon\r\nterminal compartment can depend critically on the recording location,\r\nwith terminal-end recordings giving the best estimates. Computer\r\nsimulations and whole cell recordings demonstrated that terminal-end\r\nrecordings can yield more accurate estimates of the peak amplitude\r\nand kinetic properties of postsynaptic currents generated at the axon\r\nterminals due to increased electrotonic filtering of these currents when\r\nrecorded at the soma. ...\" See paper for more and details.",
- "tags": [
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 756,
- "tag": "Methods"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 1152,
- "tag": "ModelDB:84655"
- }
- ],
- "timestamp_created": "2024-01-11 15:25:37.742691+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/84655",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "682": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 682,
- "name": "Models of Na channels from a paper on the PKC control of I Na,P (Baker 2005)",
- "repository_type": "github",
- "summary": "\"The tetrodotoxin-resistant (TTX-r) persistent Na(+) current, attributed to Na(V)1.9, was recorded in small (< 25 mum apparent diameter) dorsal root ganglion (DRG) neurones cultured from P21 rats and from adult wild-type and Na(V)1.8 null mice. ... Numerical simulation of the up-regulation qualitatively reproduced changes in sensory neurone firing properties. ...\" Note: models of NaV1.8 and NaV1.9 and also persistent and transient Na channels that collectively model Nav 1.1, 1.6, and 1.7 are present in this model.",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 739,
- "tag": "I Na,p"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 567,
- "tag": "Ion Channel Kinetics"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 775,
- "tag": "Nociception"
- },
- {
- "id": 751,
- "tag": "Signaling pathways"
- },
- {
- "id": 1153,
- "tag": "ModelDB:85112"
- }
- ],
- "timestamp_created": "2024-01-11 15:25:38.391628+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/85112",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "683": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 683,
- "name": "Modeling temperature changes in AMPAR kinetics (Postlethwaite et al 2007)",
- "repository_type": "github",
- "summary": "This model was used to simulate glutamatergic, AMPA receptor mediated mEPSCs (miniature EPSCs, resulting from spontaneous vesicular transmitter release) at the calyx of Held synapse. It was used to assess the influence of temperature (physiological vs. subphysiological) on the amplitude and time course of mEPSCs. In the related paper, simulation results were directly compared to the experimental data, and it was concluded that an increase of temperature accelerates AMPA receptor kinetics.",
- "tags": [
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 826,
- "tag": "MCell"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 724,
- "tag": "Short-term Synaptic Plasticity"
- },
- {
- "id": 1154,
- "tag": "ModelDB:85981"
- }
- ],
- "timestamp_created": "2024-01-11 15:25:39.000269+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/85981",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "id": 684,
- "name": "TTX-R Na+ current effect on cell response (Herzog et al 2001)",
- "repository_type": "github",
- "summary": "\"Small dorsal root ganglion (DRG) neurons, which include nociceptors,\r\nexpress multiple voltage-gated sodium currents. In addition to a\r\nclassical fast inactivating tetrodotoxin-sensitive (TTX-S) sodium\r\ncurrent, many of these cells express a TTX-resistant (TTX-R) sodium\r\ncurrent that activates near -70 mV and is persistent at negative\r\npotentials. To investigate the possible contributions of this TTX-R\r\npersistent (TTX-RP) current to neuronal excitability, we carried out\r\ncomputer simulations using the Neuron program with TTX-S and -RP\r\ncurrents, fit by the Hodgkin-Huxley model, that closely matched the\r\ncurrents recorded from small DRG neurons. ...\" See paper for more and details.",
- "tags": [
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 739,
- "tag": "I Na,p"
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- "id": 574,
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- "id": 775,
- "tag": "Nociception"
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- "id": 1155,
- "tag": "ModelDB:86537"
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- "timestamp_created": "2024-01-11 15:25:39.483704+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/86537",
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- "id": 685,
- "name": "Model of calcium oscillations in olfactory cilia (Reidl et al. 2006)",
- "repository_type": "github",
- "summary": "Simulation of experiments on olfactory receptor neurons (ORNs). Focussing on the negative feedback that calcium (through calmodulin) has on its own influx through CNG channels, this model is able to reproduce both calcium oscillations as well as adaptation behaviour as seen in experiments done with ORNs.",
- "tags": [
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 572,
- "tag": "Calcium dynamics"
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- "id": 766,
- "tag": "I CNG"
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- "id": 567,
- "tag": "Ion Channel Kinetics"
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- "id": 655,
- "tag": "MATLAB"
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- {
- "id": 564,
- "tag": "ModelDB"
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- {
- "id": 588,
- "tag": "Olfaction"
- },
- {
- "id": 585,
- "tag": "Oscillations"
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- "id": 751,
- "tag": "Signaling pathways"
- },
- {
- "id": 569,
- "tag": "Simplified Models"
- },
- {
- "id": 720,
- "tag": "Temporal Pattern Generation"
- },
- {
- "id": 1156,
- "tag": "ModelDB:86538"
- }
- ],
- "timestamp_created": "2024-01-11 15:25:39.990206+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/86538",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
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- "id": 686,
- "name": "STDP and NMDAR Subunits (Gerkin et al. 2007)",
- "repository_type": "github",
- "summary": "The paper argues for competing roles of NR2A- and NR2B-containing NMDARs in spike-timing-dependent plasticity. This simple dynamical model recapitulates the results of STDP experiments involving selective blockers of NR2A- and NR2B-containing NMDARs, for which the stimuli are pre- and postsynaptic spikes in varying combinations. Experiments were done using paired recordings from glutamatergic neurons in rat hippocampal cultures. This model focuses on the dynamics of the putative potentiation and depression modules themselves, and their interaction For detailed dynamics involving NMDARs and Ca2+ transients, see Rubin et al., J. Neurophys., 2005.",
- "tags": [
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 820,
- "tag": "IGOR Pro"
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- "id": 749,
- "tag": "Long-term Synaptic Plasticity"
- },
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- "id": 564,
- "tag": "ModelDB"
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- {
- "id": 802,
- "tag": "STDP"
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- "id": 751,
- "tag": "Signaling pathways"
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- "id": 596,
- "tag": "Synaptic Integration"
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- {
- "id": 725,
- "tag": "Synaptic Plasticity"
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- "id": 822,
- "tag": "Winner-take-all"
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- "id": 1157,
- "tag": "ModelDB:87216"
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- "timestamp_created": "2024-01-11 15:25:40.484500+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/87216",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "687": {
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- "default_context": "master",
- "id": 687,
- "name": "Markov models of SCN1A (NaV1.1) applied to abnormal gating and epilepsy (Clancy and Kass 2004)",
- "repository_type": "github",
- "summary": "\"Recently, some forms of idiopathic epilepsy have been causally related to\r\ngenetic mutations in neuronal ion channels. To understand disease\r\nmechanisms, it is crucial to understand how a gene defect can disrupt\r\nchannel gating, which in turn can affect complex cellular dynamic\r\nprocesses. We develop a theoretical Markovian model of the neuronal\r\nNa+ channel NaV1.1 to explore and explain gating mechanisms underlying\r\ncellular excitability and physiological and pathophysiological\r\nmechanisms of abnormal neuronal excitability in the context of\r\nepilepsy. ...\"",
- "tags": [
- {
- "id": 755,
- "tag": "C or Cplusplus program"
- },
- {
- "id": 469,
- "tag": "Epilepsy"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 567,
- "tag": "Ion Channel Kinetics"
- },
- {
- "id": 748,
- "tag": "Markov-type model"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1158,
- "tag": "ModelDB:87278"
- }
- ],
- "timestamp_created": "2024-01-11 15:25:41.073049+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/87278",
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- "email": "info@opensourcebrain.org",
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- "688": {
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- "modeling"
- ],
- "default_context": "master",
- "id": 688,
- "name": "Amyloid beta (IA block) effects on a model CA1 pyramidal cell (Morse et al. 2010)",
- "repository_type": "github",
- "summary": "The model simulations provide evidence oblique dendrites in CA1 pyramidal neurons are susceptible to hyper-excitability by amyloid beta block of the transient K+ channel, IA. See paper for details.",
- "tags": [
- {
- "id": 579,
- "tag": "Active Dendrites"
- },
- {
- "id": 827,
- "tag": "Aging/Alzheimer`s"
- },
- {
- "id": 565,
- "tag": "Dendritic Action Potentials"
- },
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- "id": 571,
- "tag": "Detailed Neuronal Models"
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- {
- "id": 590,
- "tag": "I A"
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- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
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- "id": 589,
- "tag": "I L high threshold"
- },
- {
- "id": 721,
- "tag": "I N"
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- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 575,
- "tag": "I T low threshold"
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- {
- "id": 594,
- "tag": "I h"
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- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 787,
- "tag": "Pathophysiology"
- },
- {
- "id": 1159,
- "tag": "ModelDB:87284"
- }
- ],
- "timestamp_created": "2024-01-11 15:25:41.611895+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/87284",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
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- "username": "osbadmin"
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- "default_context": "main",
- "id": 689,
- "name": "Squid axon (Hodgkin, Huxley 1952) (SBML, XPP, other)",
- "repository_type": "github",
- "summary": "An SBML (and related XPP and other formats) implementation of the classic HH paper is available in the BIOMODELS database. See far below for links.",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 576,
- "tag": "I K"
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- {
- "id": 574,
- "tag": "I Na,t"
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- {
- "id": 729,
- "tag": "Invertebrate"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 828,
- "tag": "SBML (web link to model)"
- },
- {
- "id": 829,
- "tag": "XML (web link to model)"
- },
- {
- "id": 830,
- "tag": "XPP (web link to model)"
- },
- {
- "id": 1160,
- "tag": "ModelDB:87450"
- }
- ],
- "timestamp_created": "2024-01-11 15:25:42.138202+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/87450",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "690": {
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- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 690,
- "name": "Oscillating neurons in the cochlear nucleus (Bahmer Langner 2006a, b, and 2007)",
- "repository_type": "github",
- "summary": "\"Based on the physiological and anatomical data, we propose a model consisting of a minimum network of two choppers that are interconnected with a synaptic delay of 0.4 ms (Bahmer and Langner 2006a) . Such minimum delays have been found in different systems and in various animals (e.g. Hackett, Jackson, and Rubel 1982; Borst, Helmchen, and Sakmann 1995). The choppers receive input from both the auditory nerve and an onset neuron. This model can reproduce the mean, standard deviation, and coefficient of variation of the ISI and the dynamic features of AM coding of choppers.\"",
- "tags": [
- {
- "id": 762,
- "tag": "Audition"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 1161,
- "tag": "ModelDB:87454"
- }
- ],
- "timestamp_created": "2024-01-11 15:25:42.688372+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/87454",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "691": {
- "auto_sync": true,
- "content_types": "modeling",
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- "modeling"
- ],
- "default_context": "master",
- "id": 691,
- "name": "AP shape and parameter constraints in optimization of compartment models (Weaver and Wearne 2006)",
- "repository_type": "github",
- "summary": "\"... We construct an\r\nobjective function that includes both time-aligned action potential shape error and errors in firing rate and firing regularity. We then\r\nimplement a variant of simulated annealing that introduces a recentering algorithm to handle infeasible points outside the boundary\r\nconstraints. We show how our objective function captures essential features of neuronal firing patterns, and why our boundary\r\nmanagement technique is superior to previous approaches.\"",
- "tags": [
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 739,
- "tag": "I Na,p"
- },
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- "id": 574,
- "tag": "I Na,t"
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- "id": 756,
- "tag": "Methods"
- },
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- "id": 564,
- "tag": "ModelDB"
- },
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- "id": 577,
- "tag": "NEURON"
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- {
- "id": 568,
- "tag": "Parameter Fitting"
- },
- {
- "id": 1162,
- "tag": "ModelDB:87473"
- }
- ],
- "timestamp_created": "2024-01-11 15:25:43.163171+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/87473",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "692": {
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- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 692,
- "name": "CA1 pyramidal neurons: binding properties and the magical number 7 (Migliore et al. 2008)",
- "repository_type": "github",
- "summary": "NEURON files from the paper:\r\n\r\nSingle neuron binding properties and the magical number 7,\r\nby M. Migliore, G. Novara, D. Tegolo, Hippocampus, in press (2008).\r\n\r\nIn an extensive series of simulations with realistic morphologies and active properties, \r\nwe demonstrate how n radial (oblique) dendrites of these neurons may be used to bind n inputs \r\nto generate an output signal. \r\nThe results suggest a possible neural code as the most effective n-ple of dendrites that \r\ncan be used for short-term memory recollection of persons, objects, or places. \r\nOur analysis predicts a straightforward physiological explanation for the observed \r\npuzzling limit of about 7 short-term memory items that can be stored by humans.\r\n",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 771,
- "tag": "Action Selection/Decision Making"
- },
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- "id": 579,
- "tag": "Active Dendrites"
- },
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 595,
- "tag": "Coincidence Detection"
- },
- {
- "id": 565,
- "tag": "Dendritic Action Potentials"
- },
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 825,
- "tag": "Learning"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 719,
- "tag": "Pattern Recognition"
- },
- {
- "id": 587,
- "tag": "Spatio-temporal Activity Patterns"
- },
- {
- "id": 596,
- "tag": "Synaptic Integration"
- },
- {
- "id": 794,
- "tag": "Working memory"
- },
- {
- "id": 1163,
- "tag": "ModelDB:87535"
- }
- ],
- "timestamp_created": "2024-01-11 15:25:43.730305+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/87535",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "693": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 693,
- "name": "CA1 oriens alveus interneurons: signaling properties (Minneci et al. 2007)",
- "repository_type": "github",
- "summary": "The model supports the experimental findings showing that the dynamic interaction between cells with various firing patterns could differently affect GABAergic signaling, leading to a wide range of interneuronal communication within the hippocampal network.",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 579,
- "tag": "Active Dendrites"
- },
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 566,
- "tag": "Bursting"
- },
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 751,
- "tag": "Signaling pathways"
- },
- {
- "id": 1164,
- "tag": "ModelDB:87546"
- }
- ],
- "timestamp_created": "2024-01-11 15:25:44.240179+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/87546",
- "user": {
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- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "694": {
- "auto_sync": true,
- "content_types": "modeling",
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- "modeling"
- ],
- "default_context": "master",
- "id": 694,
- "name": "Slow wave propagation in the guinea-pig gastric antrum (Hirst et al. 2006, Edwards and Hirst 2006)",
- "repository_type": "github",
- "summary": "\"(Edwards and Hirst 2006) provides an electrical description of the propagation of slow waves and pacemaker potentials in the guinea-pig gastric antrum in anal and circumferential directions. As electrical conduction between laterally adjacent circular muscle bundles is regularly interrupted, anal conduction of pacemaker potentials was assumed to occur via an electrically interconnected chain of myenteric interstitial cells of Cajal (ICCMY). ICCMY were also connected resistively to serially connected compartments of longitudinal muscle. Circumferential conduction occurred in a circular smooth muscle bundle that was represented as a chain of electrically connected isopotential compartments: each compartment contained a proportion of intramuscular interstitial cells of Cajal (ICCIM) that are responsible for the regenerative component of the slow wave. The circular muscle layer, which contains ICCIM, and the ICCMY network incorporated a mechanism, modelled as a two-stage chemical reaction, which produces an intracellular messenger. ... The model generates pacemaker potentials and slow waves with propagation velocities similar to those determined in the physiological experiments described in the accompanying paper.\"",
- "tags": [
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 587,
- "tag": "Spatio-temporal Activity Patterns"
- },
- {
- "id": 720,
- "tag": "Temporal Pattern Generation"
- },
- {
- "id": 1165,
- "tag": "ModelDB:87581"
- }
- ],
- "timestamp_created": "2024-01-11 15:25:44.741925+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/87581",
- "user": {
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- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "695": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 695,
- "name": "Self-influencing synaptic plasticity (Tamosiunaite et al. 2007)",
- "repository_type": "github",
- "summary": "\"... Similar to a previous study (Saudargiene et al., 2004) we employ a differential\r\nHebbian learning rule to emulate spike-timing dependent\r\nplasticity and investigate how the interaction of dendritic\r\nand back-propagating spikes, as the post-synaptic signals,\r\ncould influence plasticity. ...\"",
- "tags": [
- {
- "id": 579,
- "tag": "Active Dendrites"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 802,
- "tag": "STDP"
- },
- {
- "id": 569,
- "tag": "Simplified Models"
- },
- {
- "id": 725,
- "tag": "Synaptic Plasticity"
- },
- {
- "id": 822,
- "tag": "Winner-take-all"
- },
- {
- "id": 1166,
- "tag": "ModelDB:87582"
- }
- ],
- "timestamp_created": "2024-01-11 15:25:45.366095+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/87582",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "696": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 696,
- "name": "Sodium channel mutations causing generalized epilepsy with febrile seizures + (Barela et al. 2006)",
- "repository_type": "github",
- "summary": "A novel mutation, R859C, in the Nav1.1 sodium channel was identified in a 4-generation, 33-member Caucasian family with a clinical presentation consistent with GEFS+. The mutation neutralizes a positively charged arginine in the domain 2 S4 voltage sensor of the Nav1.1 channel \u0192\u00d1 subunit. When the mutation was placed in the rat Nav1.1 channel and expressed in Xenopus oocytes, the mutant channel displayed a positive shift in the voltage-dependence of sodium channel activation, slower recovery from slow inactivation, and lower levels of current compared to the wild-type channel. Computational analysis suggests that neurons expressing the mutant channel have higher thresholds for firing a single action potential and for firing multiple action potentials, along with decreased repetitive firing. Therefore, this mutation should lead to decreased neuronal excitability, in contrast to most previous GEFS+ sodium channel mutations that have changes predicted to increase neuronal firing.",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 469,
- "tag": "Epilepsy"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 1167,
- "tag": "ModelDB:87585"
- }
- ],
- "timestamp_created": "2024-01-11 15:25:45.829199+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/87585",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "697": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 697,
- "name": "Cat auditory nerve model (Zilany and Bruce 2006, 2007)",
- "repository_type": "github",
- "summary": "\"This paper presents a computational model to simulate normal and impaired auditory-nerve (AN)\r\nfiber responses in cats. The model responses match physiological data over a wider dynamic range\r\nthan previous auditory models. This is achieved by providing two modes of basilar membrane\r\nexcitation to the inner hair cell (IHC) rather than one. ... The model responses are consistent with a wide range of\r\nphysiological data from both normal and impaired ears for stimuli presented at levels spanning the\r\ndynamic range of hearing.\"",
- "tags": [
- {
- "id": 767,
- "tag": "MATLAB (web link to model)"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 791,
- "tag": "Rate-coding model neurons"
- },
- {
- "id": 569,
- "tag": "Simplified Models"
- },
- {
- "id": 1168,
- "tag": "ModelDB:87751"
- }
- ],
- "timestamp_created": "2024-01-11 15:25:46.313777+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/87751",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "698": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 698,
- "name": "Cochlear implant models (Bruce et al. 1999a, b, c, 2000)",
- "repository_type": "github",
- "summary": "\"In a recent set of modeling studies we have developed a stochastic threshold model of auditory nerve response to single biphasic electrical pulses (Bruce et al., 1999c) and moderate rate (less than 800 pulses per second) pulse trains (Bruce et al., 1999a). In this article we derive an analytical approximation for the single-pulse model, which is then extended to describe the pulse-train model in the case of evenly timed, uniform pulses. This renewal-process description provides an accurate and computationally efficient model of electrical stimulation of single auditory nerve fibers by a cochlear implant that may be extended to other forms of electrical neural stimulation.\"",
- "tags": [
- {
- "id": 762,
- "tag": "Audition"
- },
- {
- "id": 767,
- "tag": "MATLAB (web link to model)"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 569,
- "tag": "Simplified Models"
- },
- {
- "id": 1169,
- "tag": "ModelDB:87760"
- }
- ],
- "timestamp_created": "2024-01-11 15:25:46.797504+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/87760",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "699": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 699,
- "name": "The role of ATP-sensitive potassium channels in a hippocampal neuron (Huang et al. 2007)",
- "repository_type": "github",
- "summary": "\"Hyperglycemia-related neuronal excitability and epileptic seizures \r\nare not uncommon in clinical practice. However, their underlying \r\nmechanism remains elusive. ATP-sensitive K(+) (K(ATP)) channels are \r\nfound in many excitable cells, including cardiac myocytes, \r\npancreatic beta cells, and neurons. These channels provide a link \r\nbetween the electrical activity of cell membranes and cellular \r\nmetabolism. We investigated the effects of higher extracellular \r\nglucose on hippocampal K(ATP) channel activities and neuronal \r\nexcitability. The cell-attached patch-clamp configuration on \r\ncultured hippocampal cells and a novel multielectrode recording \r\nsystem on hippocampal slices were employed. In addition, a \r\nsimulation modeling hippocampal CA3 pyramidal neurons (Pinsky-Rinzel \r\nmodel) was analyzed to investigate the role of K(ATP) channels in \r\nthe firing of simulated action potentials. ...\"",
- "tags": [
- {
- "id": 795,
- "tag": "ATP-senstive potassium current"
- },
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 566,
- "tag": "Bursting"
- },
- {
- "id": 469,
- "tag": "Epilepsy"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 759,
- "tag": "XPPAUT"
- },
- {
- "id": 1170,
- "tag": "ModelDB:87762"
- }
- ],
- "timestamp_created": "2024-01-11 15:25:47.274602+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/87762",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "700": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 700,
- "name": "Olfactory bulb network model of gamma oscillations (Bathellier et al. 2006; Lagier et al. 2007)",
- "repository_type": "github",
- "summary": "This model implements a network of 100 mitral cells connected with \r\nasynchronous inhibitory \"synapses\" that is meant to reproduce the \r\nGABAergic transmission of ensembles of connected granule cells. \r\nFor appropriate parameters of this special synapse the model generates \r\ngamma oscillations with properties very similar to what is observed \r\nin olfactory bulb slices (See Bathellier et al. 2006, Lagier et al. 2007).\r\nMitral cells are modeled as single compartment neurons with a small \r\nnumber of different voltage gated channels. Parameters were tuned to reproduce the\r\nfast subthreshold oscillation of the membrane potential observed experimentally\r\n(see Desmaisons et al. 1999).\r\n",
- "tags": [
- {
- "id": 755,
- "tag": "C or Cplusplus program"
- },
- {
- "id": 754,
- "tag": "Delay"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 739,
- "tag": "I Na,p"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 588,
- "tag": "Olfaction"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 1171,
- "tag": "ModelDB:91387"
- }
- ],
- "timestamp_created": "2024-01-11 15:25:47.815939+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/91387",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "701": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 701,
- "name": "Oxytocin and VIP involvement in prolactin secretion (Egli et al. 2004,2006, Bertram et al. 2006)",
- "repository_type": "github",
- "summary": "\"Prolactin (PRL) is secreted from lactotrophs of the anterior\r\npituitary gland of rats in a unique pattern in response to\r\nuterine cervical stimulation (CS) during mating. Surges of\r\nPRL secretion occur in response to relief from hypothalamic\r\ndopaminergic inhibition and stimulation by hypothalamic releasing\r\nneurohormones. In this study, we characterized the\r\nrole of oxytocin (OT) in this system and the involvement of\r\nvasoactive intestinal polypeptide (VIP) from the suprachiasmatic\r\nnucleus (SCN) in controlling OT and PRL secretion of\r\nCS rats. ... OT\r\nmeasurements of serial blood samples obtained from ovariectomized\r\n(OVX) CS rats displayed a prominent increase at\r\nthe time of the afternoon PRL peak. The injection of VIP antisense\r\noligonucleotides into the SCN abolished the afternoon\r\nincrease of OT and PRL in CS-OVX animals. These findings\r\nsuggest that VIP from the SCN contributes to the regulation\r\nof OT and PRL secretion in CS rats. We propose that in CS rats\r\nthe regulatory mechanism(s) for PRL secretion comprise coordinated\r\naction of neuroendocrine dopaminergic and OT\r\ncells, both governed by the daily rhythm of VIP-ergic output\r\nfrom the SCN. This hypothesis is illustrated with a mathematical model.\"",
- "tags": [
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 830,
- "tag": "XPP (web link to model)"
- },
- {
- "id": 1172,
- "tag": "ModelDB:91893"
- }
- ],
- "timestamp_created": "2024-01-11 15:25:48.349691+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/91893",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "702": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 702,
- "name": "Low dose of dopamine may stimulate prolactin secretion by increasing K currents (Tabak et al. 2006)",
- "repository_type": "github",
- "summary": "\".. We considered\r\nthe fast K+ currents flowing through large-conductance\r\nBK channels and through A-type channels. We developed a\r\nminimal lactotroph model to investigate the effects of these\r\ntwo currents. Both IBK and IA could transform the electrical\r\npattern of activity from spiking to bursting, but through\r\ndistinct mechanisms. IBK always increased the intracellular\r\nCa2+ concentration, while IA could either increase or\r\ndecrease it. Thus, the stimulatory effects of DA could be\r\nmediated by a fast K+ conductance which converts tonically\r\nspiking cells to bursters. In addition, the study illustrates that\r\na heterogeneous distribution of fast K+ conductances could\r\ncause heterogeneous lactotroph firing patterns.\"",
- "tags": [
- {
- "id": 566,
- "tag": "Bursting"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 830,
- "tag": "XPP (web link to model)"
- },
- {
- "id": 1173,
- "tag": "ModelDB:91898"
- }
- ],
- "timestamp_created": "2024-01-11 15:25:48.950482+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/91898",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "703": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 703,
- "name": "Endothelin action on pituitary latotrophs (Bertram et al. 2006)",
- "repository_type": "github",
- "summary": "Endothelin (ET-1, -2, and -3 designate three genes which produce different endothelin isopeptides) is a prolactin inhibiting substance of hypothalmic origin. ET-1 binding is part of at least four G protein signaling pathways in lactotrophs. The sequence of events in these pathways following the presentation of nano- and pico-molar concentrations of ET-1 is modeled in the paper.",
- "tags": [
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 818,
- "tag": "I_SERCA"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 751,
- "tag": "Signaling pathways"
- },
- {
- "id": 830,
- "tag": "XPP (web link to model)"
- },
- {
- "id": 1174,
- "tag": "ModelDB:91899"
- }
- ],
- "timestamp_created": "2024-01-11 15:25:49.682431+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/91899",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "704": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 704,
- "name": "Implementation issues in approximate methods for stochastic Hodgkin-Huxley models (Bruce 2007)",
- "repository_type": "github",
- "summary": "Four different algorithms for implementing Hodgkin\u2013Huxley models\r\nwith stochastic sodium channels: Strassberg and\r\nDeFelice (1993), Rubinstein (1995), Chow and White\r\n(1996), and Fox (1997) are compared.",
- "tags": [
- {
- "id": 767,
- "tag": "MATLAB (web link to model)"
- },
- {
- "id": 756,
- "tag": "Methods"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1175,
- "tag": "ModelDB:93315"
- }
- ],
- "timestamp_created": "2024-01-11 15:25:50.140702+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/93315",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "705": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 705,
- "name": "Lamprey spinal CPG neuron (Huss et al. 2007)",
- "repository_type": "github",
- "summary": "This is a model of a generic locomotor network neuron in the lamprey spinal cord. The given version is assumed to correspond to an interneuron; motoneurons can also be modelled by changing the dendritic tree morphology.",
- "tags": [
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 600,
- "tag": "GENESIS"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 783,
- "tag": "I_Ks"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 573,
- "tag": "Rebound firing"
- },
- {
- "id": 1176,
- "tag": "ModelDB:93319"
- }
- ],
- "timestamp_created": "2024-01-11 15:25:50.619324+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/93319",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "706": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 706,
- "name": "Activity dependent conductances in a neuron model (Liu et al. 1998)",
- "repository_type": "github",
- "summary": "\"... We present a model of a\r\nstomatogastric ganglion (STG) neuron in which several Ca2+-dependent\r\npathways are used to regulate the maximal conductances of membrane\r\ncurrents in an activity-dependent manner. Unlike previous models of\r\nthis type, the regulation and modification of maximal conductances by\r\nelectrical activity is unconstrained. The model has seven\r\nvoltage-dependent membrane currents and uses three Ca2+ sensors acting\r\non different time scales. ... The model suggests that neurons may regulate their\r\nconductances to maintain fixed patterns of electrical activity, rather\r\nthan fixed maximal conductances, and that the regulation process\r\nrequires feedback systems capable of reacting to changes of electrical\r\nactivity on a number of different time scales.\"",
- "tags": [
- {
- "id": 566,
- "tag": "Bursting"
- },
- {
- "id": 75,
- "tag": "Homeostasis"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 589,
- "tag": "I L high threshold"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 575,
- "tag": "I T low threshold"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 720,
- "tag": "Temporal Pattern Generation"
- },
- {
- "id": 1177,
- "tag": "ModelDB:93321"
- }
- ],
- "timestamp_created": "2024-01-11 15:25:51.109482+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/93321",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "707": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 707,
- "name": "Updated Tritonia Swim CPG (Calin-Jagemann et al. 2007)",
- "repository_type": "github",
- "summary": "Model of the 3-cell core CPG (DSI, C2, and VSI-B) mediating escape swimming in Tritonia diomedea. Cells use a hybrid integrate-and-fire scheme pioneered by Peter Getting. Each model cell is reconstructed from extensive physiological measurements to precisely mimic I-F curves, synaptic waveforms, and functional connectivity.",
- "tags": [
- {
- "id": 566,
- "tag": "Bursting"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 729,
- "tag": "Invertebrate"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 1178,
- "tag": "ModelDB:93325"
- }
- ],
- "timestamp_created": "2024-01-11 15:25:51.590555+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/93325",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "708": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 708,
- "name": "Classic model of the Tritonia Swim CPG (Getting, 1989)",
- "repository_type": "github",
- "summary": "Classic model developed by Petter Getting of the 3-cell core CPG (DSI, C2, and VSI-B) mediating escape swimming in Tritonia diomedea. Cells use a hybrid integrate-and-fire scheme pioneered by Peter Getting. Each model cell is reconstructed from extensive physiological measurements to precisely mimic I-F curves, synaptic waveforms, and functional connectivity. **However, continued physiological measurements show that Getting may have inadvertently incorporated modulatory and or polysynaptic effects -- the properties of this model do *not* match physiological measurements in rested preparations.** This simulation reconstructs the Getting model as reported in: Getting (1989) 'Reconstruction of small neural networks' In Methods in Neural Modeling, 1st ed, p. 171-196. See also, an earlier version of this model reported in Getting (1983). Every attempt has been made to replicate the 1989 model as precisely as possible.",
- "tags": [
- {
- "id": 566,
- "tag": "Bursting"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 729,
- "tag": "Invertebrate"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 1179,
- "tag": "ModelDB:93326"
- }
- ],
- "timestamp_created": "2024-01-11 15:25:52.094964+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/93326",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "709": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 709,
- "name": "Pyramidal Neuron Deep: Constrained by experiment (Dyhrfjeld-Johnsen et al. 2005)",
- "repository_type": "github",
- "summary": "\"... As a practical demonstration of the use of CoCoDat we\r\nconstructed a detailed computer model of an intrinsically\r\nbursting (IB) layer V pyramidal neuron from the rat barrel\r\ncortex supplementing experimental data (Schubert et al.,\r\n2001) with information extracted from the database. The\r\npyramidal neuron morphology (Fig. 10B) was reconstructed\r\nfrom histological sections of a biocytin-stained IB neuron\r\nusing the NeuroLucida software package...\"",
- "tags": [
- {
- "id": 566,
- "tag": "Bursting"
- },
- {
- "id": 600,
- "tag": "GENESIS"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 589,
- "tag": "I L high threshold"
- },
- {
- "id": 580,
- "tag": "I M"
- },
- {
- "id": 739,
- "tag": "I Na,p"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 575,
- "tag": "I T low threshold"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1180,
- "tag": "ModelDB:93349"
- }
- ],
- "timestamp_created": "2024-01-11 15:25:52.582274+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/93349",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "710": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 710,
- "name": "Efficient estimation of detailed single-neuron models (Huys et al. 2006)",
- "repository_type": "github",
- "summary": "\"Biophysically accurate multicompartmental models of individual neurons ... depend on a large number of parameters that are difficult to estimate. ... We propose a statistical approach to the automatic estimation of various biologically relevant parameters, including 1) the distribution of channel densities, 2) the spatiotemporal pattern of synaptic input, and 3) axial resistances across extended dendrites. ... We demonstrate that the method leads to accurate estimations on a wide variety of challenging model data sets that include up to about 10,000 parameters (roughly two orders of magnitude more than previously feasible) and describe how the method gives insights into the functional interaction of groups of channels.\"",
- "tags": [
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 756,
- "tag": "Methods"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1181,
- "tag": "ModelDB:93390"
- }
- ],
- "timestamp_created": "2024-01-11 15:25:53.057079+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/93390",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "711": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 711,
- "name": "Fast population coding (Huys et al. 2007)",
- "repository_type": "github",
- "summary": "\"Uncertainty coming from the noise in its neurons and the ill-posed nature of many tasks plagues neural computations. Maybe surprisingly, many studies show that the brain manipulates these forms of uncertainty in a probabilistically consistent and normative manner, and there is now a rich theoretical literature on the capabilities of populations of neurons to implement computations in the face of uncertainty. However, one major facet of uncertainty has received comparatively little attention: time. In a dynamic, rapidly changing world, data are only temporarily relevant. Here, we analyze the computational consequences of encoding stimulus trajectories in populations of neurons. ...\"",
- "tags": [
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 756,
- "tag": "Methods"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1182,
- "tag": "ModelDB:93394"
- }
- ],
- "timestamp_created": "2024-01-11 15:25:53.547720+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/93394",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "712": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 712,
- "name": "Mapping function onto neuronal morphology (Stiefel and Sejnowski 2007)",
- "repository_type": "github",
- "summary": "\"... We used an optimization procedure to find neuronal morphological\r\nstructures for two computational tasks: First, neuronal morphologies were selected for\r\nlinearly summing excitatory synaptic potentials (EPSPs); second, structures were\r\nselected that distinguished the temporal order of EPSPs. The solutions resembled the\r\nmorphology of real neurons. In particular the neurons optimized for linear summation\r\nelectrotonically separated their synapses, as found in avian nucleus laminaris neurons,\r\nand neurons optimized for spike-order detection had primary dendrites of significantly\r\ndifferent diameter, as found in the basal and apical dendrites of cortical pyramidal\r\nneurons. ...\"",
- "tags": [
- {
- "id": 570,
- "tag": "Influence of Dendritic Geometry"
- },
- {
- "id": 756,
- "tag": "Methods"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 803,
- "tag": "Unsupervised Learning"
- },
- {
- "id": 1183,
- "tag": "ModelDB:93398"
- }
- ],
- "timestamp_created": "2024-01-11 15:25:54.008011+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/93398",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "713": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 713,
- "name": "Periodicity in Na channel properties alters model neuron excitability (Majumdar and Sikdar 2007)",
- "repository_type": "github",
- "summary": "\"... We have shown earlier that the\r\nduration and amplitude of a prolonged depolarization alter all the steady state and kinetic parameters of rNav1.2a voltage gated Na\r\nchannel in a pseudo-oscillatory fashion. In the present study, we show that the Hodgkin\u2013Huxley voltage and time dependent rate constants\r\nof activation (am and bm) and fast inactivation (ah and bh), obtained from the analyses of Na currents and steady state activation\r\nand inactivation plots, following application of prepulses in both slow (1\u2013100 s) and fast (100\u20131000 ms) ranges, vary with the duration of\r\na prepulse in a pseudo-oscillatory manner. ...\"",
- "tags": [
- {
- "id": 469,
- "tag": "Epilepsy"
- },
- {
- "id": 600,
- "tag": "GENESIS"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 567,
- "tag": "Ion Channel Kinetics"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1184,
- "tag": "ModelDB:93416"
- }
- ],
- "timestamp_created": "2024-01-11 15:25:54.820369+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/93416",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "714": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 714,
- "name": "A neural model of Parkinson`s disease (Cutsuridis and Perantonis 2006, Cutsuridis 2006, 2007)",
- "repository_type": "github",
- "summary": "\"A neural model of neuromodulatory (dopamine) control of arm movements in Parkinson\u2019s disease (PD) bradykinesia was recently introduced [1, 2]. The model is multi-modular consisting of a basal ganglia module capable of selecting the most appropriate motor command in a given context, a cortical module for coordinating and executing the final motor commands, and a spino-musculo-skeletal module for guiding the arm to its final target and providing proprioceptive (feedback) input of the current state of the muscle and arm to higher cortical and lower spinal centers.\r\n... The new (extended) model [3] predicted that the reduced reciprocal disynaptic Ia inhibition in the DA depleted case doesn\u2019t lead to the co-contraction of antagonist motor units.\" See below readme and papers for more and details.",
- "tags": [
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 801,
- "tag": "Parkinson's"
- },
- {
- "id": 787,
- "tag": "Pathophysiology"
- },
- {
- "id": 1185,
- "tag": "ModelDB:93422"
- }
- ],
- "timestamp_created": "2024-01-11 15:25:55.310252+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/93422",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "715": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 715,
- "name": "Optimal deep brain stimulation of the subthalamic nucleus-a computational study (Feng et al. 2007)",
- "repository_type": "github",
- "summary": "Here, we use a biophysically-based model of spiking cells in the basal ganglia (Terman et al., Journal of Neuroscience, 22, 2963-2976, 2002; Rubin and Terman, Journal of Computational Neuroscience, 16, 211-235, 2004) to provide computational evidence that alternative temporal patterns of DBS inputs might be equally effective as the standard high-frequency waveforms, but require lower amplitudes. Within this model, DBS performance is assessed in two ways. First, we determine the extent to which DBS causes Gpi (globus pallidus pars interna) synaptic outputs, which are burstlike and synchronized in the unstimulated Parkinsonian state, to cease their pathological modulation of simulated thalamocortical cells. Second, we evaluate how DBS affects the GPi cells' auto- and cross-correlograms.",
- "tags": [
- {
- "id": 755,
- "tag": "C or Cplusplus program"
- },
- {
- "id": 831,
- "tag": "Deep brain stimulation"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 575,
- "tag": "I T low threshold"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 801,
- "tag": "Parkinson's"
- },
- {
- "id": 1186,
- "tag": "ModelDB:93449"
- }
- ],
- "timestamp_created": "2024-01-11 15:25:55.798154+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/93449",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "716": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 716,
- "name": "Inferring connection proximity in electrically coupled networks (Cali et al. 2007)",
- "repository_type": "github",
- "summary": "In order to explore electrical coupling in the nervous system and its network-level organization, it is imperative to map the electrical synaptic microcircuits, in analogy with in vitro studies on monosynaptic and disynaptic chemical coupling. However, walking from cell to cell over large distances with a glass pipette is challenging, and microinjection of (fluorescent) dyes diffusing through gap-junctions remains so far the only method available to decipher such microcircuits even though technical limitations exist.\r\n\r\nBased on circuit theory, we derived analytical descriptions of the AC electrical coupling in networks of isopotential cells. We then proposed an operative electrophysiological protocol to distinguish between direct electrical connections and connections involving one or more intermediate cells. \r\n\r\nThis method allows inferring the number of intermediate cells, generalizing the conventional coupling coefficient, which provides limited information. \r\n\r\nWe provide here some analysis and simulation scripts that used to test our method through computer simulations, in vitro recordings, theoretical and numerical methods.\r\n\r\nKey words: Gap-Junctions; Electrical Coupling; Networks; ZAP current; Impedance.\r\n",
- "tags": [
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 756,
- "tag": "Methods"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 788,
- "tag": "PSpice"
- },
- {
- "id": 832,
- "tag": "Sspice Symbolic SPICE"
- },
- {
- "id": 1187,
- "tag": "ModelDB:94321"
- }
- ],
- "timestamp_created": "2024-01-11 15:25:56.403897+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/94321",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "717": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 717,
- "name": "Turtle visual cortex model (Nenadic et al. 2003, Wang et al. 2005, Wang et al. 2006)",
- "repository_type": "github",
- "summary": "This is a model of the visual cortex of freshwater turtles that is based upon the\r\nknown anatomy and physiology of individual neurons. The model was published in three\r\npapers (Nenadic et al., 2003; Wang et al., 2005; Wang et al., 2006), which should be\r\nconsulted for full details on its construction. The model has also been used in several\r\npapers (Robbins and Senseman, 2004; Du et al., 2005; Du et al., 2006). It is\r\nimplemented in GENESIS (Bower and Beeman, 1998).",
- "tags": [
- {
- "id": 600,
- "tag": "GENESIS"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 589,
- "tag": "I L high threshold"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 587,
- "tag": "Spatio-temporal Activity Patterns"
- },
- {
- "id": 726,
- "tag": "Vision"
- },
- {
- "id": 1188,
- "tag": "ModelDB:94845"
- }
- ],
- "timestamp_created": "2024-01-11 15:25:56.892282+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/94845",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "718": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 718,
- "name": "Rod photoreceptor (Barnes and Hille 1989, Publio et al. 2006, Kourennyi and Liu et al. 2004)",
- "repository_type": "github",
- "summary": "This a conductance-based model of a rod photoreceptor cell based on other modeling works\r\n(Barnes and Hille 1989 and Publio et al. 2006 and Kourennyi and Liu et al. 2004 ). In this\r\nmodel four types of ionic channels identified in the inner segment of the rod: nonselective cation channel (h), delayed rectifying potassium channel (Kv), noninactivating potassium channel (Kx) and calcium channel (Ca) was used. \r\nThe model accurately reproduces the rod response when stimulated with a simulated photocurrent signal. We can show the effect of nonselective cation channel. The absence of this channel cause increasing the peak amplitude and the time to \r\nreach the peak of voltage response and absence of transient mode in this response.",
- "tags": [
- {
- "id": 572,
- "tag": "Calcium dynamics"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 780,
- "tag": "I Cl,Ca"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 567,
- "tag": "Ion Channel Kinetics"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 1189,
- "tag": "ModelDB:95870"
- }
- ],
- "timestamp_created": "2024-01-11 15:25:57.365572+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/95870",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
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- "auto_sync": true,
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- ],
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- "id": 719,
- "name": "Dentate gyrus granule cell: subthreshold signal processing (Schmidt-Hieber et al. 2007)",
- "repository_type": "github",
- "summary": "Detailed compartmental cable models of 8 hippocampal granule cells of adult mice were obtained from dual patch-clamp whole-cell recordings and subsequent 3D reconstructions. This code allows to reproduce figures 6-8 from the paper.",
- "tags": [
- {
- "id": 570,
- "tag": "Influence of Dendritic Geometry"
- },
- {
- "id": 564,
- "tag": "ModelDB"
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- "id": 577,
- "tag": "NEURON"
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- "id": 568,
- "tag": "Parameter Fitting"
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- "id": 596,
- "tag": "Synaptic Integration"
- },
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- "id": 1190,
- "tag": "ModelDB:95960"
- }
- ],
- "timestamp_created": "2024-01-11 15:25:57.831095+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/95960",
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- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "id": 720,
- "name": "Kinetics of the P2X7 receptor as expressed in Xenopus oocytes (Riedel et al. 2007a,b)",
- "repository_type": "github",
- "summary": "\"Human P2X7 receptors were expressed in Xenopus laevis oocytes and\r\nsingle channels were recorded using the patch-clamp technique in the\r\noutside-out configuration. ATP4- evoked two types of P2X7\r\nreceptor-mediated single channel currents characterized by short-lived\r\nand long-lived openings. ... The kinetics of the short channel\r\nopenings at negative membrane potentials fitted well to a linear\r\nC-C-C-O model with two ATP4- binding steps at equal binding sites\r\n....\" and \"Using the patch-clamp method, we studied the influence of\r\nexternal alkali and organic monovalent cations on the single-channel\r\nproperties of the adenosine triphosphate (ATP)-activated recombinant\r\nhuman P2X(7) receptor.\" See the references for more.",
- "tags": [
- {
- "id": 567,
- "tag": "Ion Channel Kinetics"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
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- "id": 775,
- "tag": "Nociception"
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- "id": 833,
- "tag": "QuB"
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- "id": 1191,
- "tag": "ModelDB:95990"
- }
- ],
- "timestamp_created": "2024-01-11 15:25:58.303048+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/95990",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
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- "auto_sync": true,
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- "modeling"
- ],
- "default_context": "master",
- "id": 721,
- "name": "Translating network models to parallel hardware in NEURON (Hines and Carnevale 2008)",
- "repository_type": "github",
- "summary": "Shows how to move a working network model written in NEURON from a serial processor to a parallel machine in such a way that the final result will produce numerically identical results on either serial or parallel hardware.",
- "tags": [
- {
- "id": 756,
- "tag": "Methods"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 569,
- "tag": "Simplified Models"
- },
- {
- "id": 1192,
- "tag": "ModelDB:96444"
- }
- ],
- "timestamp_created": "2024-01-11 15:25:58.774534+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/96444",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "722": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 722,
- "name": "Olfactory bulb mitral and granule cell: dendrodendritic microcircuits (Migliore and Shepherd 2008)",
- "repository_type": "github",
- "summary": "This model shows how backpropagating action potentials in the long lateral dendrites of mitral cells, together with granule cell actions on mitral cells within narrow columns forming glomerular units, can provide a mechanism to activate strong local inhibition between arbitrarily distant mitral cells. The simulations predict a new role for the dendrodendritic synapses in the multicolumnar organization of the granule cells.",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 579,
- "tag": "Active Dendrites"
- },
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 565,
- "tag": "Dendritic Action Potentials"
- },
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 588,
- "tag": "Olfaction"
- },
- {
- "id": 719,
- "tag": "Pattern Recognition"
- },
- {
- "id": 1193,
- "tag": "ModelDB:97263"
- }
- ],
- "timestamp_created": "2024-01-11 15:25:59.271834+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/97263",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
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- "modeling"
- ],
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- "id": 723,
- "name": "Vesicular pool simulations of synaptic depression (Aristizabal and Glavinovic 2004)",
- "repository_type": "github",
- "summary": "\"Synaptic release was simulated using a Simulink sequential storage model with three vesicular pools. Modeling was modular and easily extendable to the systems with greater number of vesicular pools, parallel input, or time-varying parameters. ... Finally, the method was tested experimentally using the rat phrenic-diaphragm neuromuscular junction.\"\r\nSee paper for more and details.",
- "tags": [
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 824,
- "tag": "Simulink"
- },
- {
- "id": 1194,
- "tag": "ModelDB:97274"
- }
- ],
- "timestamp_created": "2024-01-11 15:25:59.767706+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/97274",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "modeling"
- ],
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- "id": 724,
- "name": "Model of DARPP-32 phosphorylation in striatal medium spiny neurons (Lindskog et al. 2006)",
- "repository_type": "github",
- "summary": "The work describes a model of how transient calcium and dopamine inputs might affect phosphorylation of DARPP-32 in the medium spiny neurons in the striatum. The model is relevant for understanding both the \"three-factor rule\" for synaptic plasticity in corticostriatal synapses, and also for relating reinforcement learning theories to biology.",
- "tags": [
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 749,
- "tag": "Long-term Synaptic Plasticity"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 809,
- "tag": "Reinforcement Learning"
- },
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- "id": 751,
- "tag": "Signaling pathways"
- },
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- "id": 759,
- "tag": "XPPAUT"
- },
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- "id": 1195,
- "tag": "ModelDB:97743"
- }
- ],
- "timestamp_created": "2024-01-11 15:26:00.238453+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/97743",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "id": 725,
- "name": "Fast-spiking cortical interneuron (Golomb et al. 2007)",
- "repository_type": "github",
- "summary": "Cortical fast-spiking (FS) interneurons display highly variable electrophysiological properties. We hypothesize that this variability emerges naturally if one assumes a continuous distribution of properties in a small set of active channels. We construct a minimal, single-compartment conductance-based model of FS cells that includes transient Na+, delayed-rectifier K+, and slowly inactivating d-type K+ conductances. The model may display delay to firing. Stuttering (elliptic bursting) and subthreshold oscillations may be observed for small Na+ window current.",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 566,
- "tag": "Bursting"
- },
- {
- "id": 754,
- "tag": "Delay"
- },
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- "id": 730,
- "tag": "I A, slow"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 574,
- "tag": "I Na,t"
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- "id": 747,
- "tag": "I_KD"
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- "id": 564,
- "tag": "ModelDB"
- },
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- "id": 577,
- "tag": "NEURON"
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- "id": 834,
- "tag": "Stuttering"
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- "id": 759,
- "tag": "XPPAUT"
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- "id": 1196,
- "tag": "ModelDB:97747"
- }
- ],
- "timestamp_created": "2024-01-11 15:26:00.735586+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/97747",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "id": 726,
- "name": "Ion channel modeling with whole cell and a genetic algorithm (Gurkiewicz and Korngreen 2007)",
- "repository_type": "github",
- "summary": "\"... Here we show that a genetic search algorithm in combination with a gradient descent algorithm can be used to\r\nfit whole-cell voltage-clamp data to kinetic models with a high degree of accuracy. Previously, ion channel stimulation\r\ntraces were analyzed one at a time, the results of these analyses being combined to produce a picture of channel\r\nkinetics. Here the entire set of traces from all stimulation protocols are analysed simultaneously. The algorithm was\r\ninitially tested on simulated current traces produced by several Hodgkin-Huxley\u2013like and Markov chain models of\r\nvoltage-gated potassium and sodium channels. ... Finally, the algorithm was used for finding the kinetic parameters of several voltage-gated\r\nsodium and potassium channels models by matching its results to data recorded from layer 5 pyramidal neurons\r\nof the rat cortex in the nucleated outside-out patch configuration. The minimization scheme gives electrophysiologists\r\na tool for reproducing and simulating voltage-gated ion channel kinetics at the cellular level.\"",
- "tags": [
- {
- "id": 567,
- "tag": "Ion Channel Kinetics"
- },
- {
- "id": 748,
- "tag": "Markov-type model"
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- "tag": "Methods"
- },
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- "id": 564,
- "tag": "ModelDB"
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- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 743,
- "tag": "NEURON (web link to model)"
- },
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- "id": 1197,
- "tag": "ModelDB:97756"
- }
- ],
- "timestamp_created": "2024-01-11 15:26:01.244124+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/97756",
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- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "727": {
- "auto_sync": true,
- "content_types": "modeling",
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- "id": 727,
- "name": "Study of augmented Rubin and Terman 2004 deep brain stim. model in Parkinsons (Pascual et al. 2006)",
- "repository_type": "github",
- "summary": "\" ... The model by Rubin and Terman [31] represents one of the most comprehensive and biologically plausible models of DBS published recently. We examined the validity of the model, replicated its simulations and tested its robustness. While our simulations partially reproduced the results presented by Rubin and Terman [31], several issues were raised including the high complexity of the model in its non simplified form, the lack of robustness of the model with respect to small perturbations, the nonrealistic representation of the thalamus and the absence of time delays. Computational models are indeed necessary, but they may not be sufficient in their current forms to explain the effect of chronic electrical stimulation on the activity of the basal ganglia (BG) network in PD.\"",
- "tags": [
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 831,
- "tag": "Deep brain stimulation"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 589,
- "tag": "I L high threshold"
- },
- {
- "id": 574,
- "tag": "I Na,t"
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- {
- "id": 575,
- "tag": "I T low threshold"
- },
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- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 801,
- "tag": "Parkinson's"
- },
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- "id": 759,
- "tag": "XPPAUT"
- },
- {
- "id": 1198,
- "tag": "ModelDB:97850"
- }
- ],
- "timestamp_created": "2024-01-11 15:26:01.767981+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/97850",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "728": {
- "auto_sync": true,
- "content_types": "modeling",
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- "modeling"
- ],
- "default_context": "master",
- "id": 728,
- "name": "Rejuvenation model of dopamine neuron (Chan et al. 2007)",
- "repository_type": "github",
- "summary": "Model files for the paper C. Savio Chan, et al. 'Rejuvenation' protects neurons in mouse models of Parkinson's disease, Nature 447, 1081-1086(28 June 2007).",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 801,
- "tag": "Parkinson's"
- },
- {
- "id": 569,
- "tag": "Simplified Models"
- },
- {
- "id": 1199,
- "tag": "ModelDB:97860"
- }
- ],
- "timestamp_created": "2024-01-11 15:26:02.292001+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/97860",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "729": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 729,
- "name": "Mammalian Ventricular Cell (Beeler and Reuter 1977)",
- "repository_type": "github",
- "summary": "This classic model of ventricular myocardial fibres was implemented by Francois Gannier. \"... Four individual components of ionic current were formulated mathematically\r\nin terms of Hodgkin-Huxley type equations. The model incorporates\r\ntwo voltage- and time-dependent inward currents, the excitatory\r\ninward sodium current, illa, and a secondary or slow inward current,\r\nis, primarily carried by calcium ions. A time-independent outward\r\npotassium current, iK1, exhibiting inward-going rectification, and a voltage-\r\nand time-dependent outward current, i.1, primarily carried by potassium\r\nions, are further elements of the model....\"\r\n",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 567,
- "tag": "Ion Channel Kinetics"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 1200,
- "tag": "ModelDB:97863"
- }
- ],
- "timestamp_created": "2024-01-11 15:26:02.806788+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/97863",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "730": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 730,
- "name": "NEURON interfaces to MySQL and the SPUD feature extraction algorithm (Neymotin et al. 2008)",
- "repository_type": "github",
- "summary": "See the readme.txt for information on setting up this interface to a MySQL server from the NEURON simulator. Note the SPUD feature extraction algorithm includes its own readme in the spud directory.",
- "tags": [
- {
- "id": 756,
- "tag": "Methods"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 1201,
- "tag": "ModelDB:97868"
- }
- ],
- "timestamp_created": "2024-01-11 15:26:03.378577+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/97868",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "731": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 731,
- "name": "Neural Query System NQS Data-Mining From Within the NEURON Simulator (Lytton 2006)",
- "repository_type": "github",
- "summary": "NQS is a databasing program with a query command modeled loosely on the SQL select command.\r\nPlease see the manual NQS.pdf for details of use.\r\nAn NQS database must be populated with data to be used. This package includes MFP (model fingerprint) which provides an example of NQS use with the model provided in the modeldb folder (see readme for usage).",
- "tags": [
- {
- "id": 756,
- "tag": "Methods"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 1202,
- "tag": "ModelDB:97874"
- }
- ],
- "timestamp_created": "2024-01-11 15:26:03.843940+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/97874",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "732": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 732,
- "name": "Determinants of fast calcium dynamics in dendritic spines and dendrites (Cornelisse et al. 2007)",
- "repository_type": "github",
- "summary": "\"... Calcium influx time course and calcium extrusion rate were both in the same range for spines and dendrites when fitted with a dynamic multi-compartment model that included calcium binding kinetics and diffusion. In a subsequent analysis we used this model to investigate which parameters are critical determinants in spine calcium dynamics. The model confirmed the experimental findings: a higher SVR (surface-to-volume ratio) is not sufficient by itself to explain the faster rise time kinetics in spines, but only when paired with a lower buffer capacity in spines. Simulations at zero calcium-dye conditions show that calmodulin is more efficiently activated in spines, which indicates that spine morphology and buffering conditions in neocortical spines favor synaptic plasticity. ...\"",
- "tags": [
- {
- "id": 835,
- "tag": "CalC Calcium Calculator"
- },
- {
- "id": 572,
- "tag": "Calcium dynamics"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1203,
- "tag": "ModelDB:97903"
- }
- ],
- "timestamp_created": "2024-01-11 15:26:04.343772+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/97903",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "733": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 733,
- "name": "Cell splitting in neural networks extends strong scaling (Hines et al. 2008)",
- "repository_type": "github",
- "summary": "Neuron tree topology equations can be split into two subtrees and solved\r\non different processors with no change in accuracy, stability, or\r\ncomputational effort; communication costs involve only sending and\r\nreceiving two double precision values by each subtree at each time step.\r\nApplication of the cell splitting method to two published\r\nnetwork models exhibits good runtime scaling on twice as many\r\nprocessors as could be effectively used with whole-cell balancing.\r\n",
- "tags": [
- {
- "id": 756,
- "tag": "Methods"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 1204,
- "tag": "ModelDB:97917"
- }
- ],
- "timestamp_created": "2024-01-11 15:26:04.801431+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/97917",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "734": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 734,
- "name": "Roles of subthalamic nucleus and DBS in reinforcement conflict-based decision making (Frank 2006)",
- "repository_type": "github",
- "summary": "Deep brain stimulation (DBS) of the subthalamic nucleus dramatically improves the motor symptoms of Parkinson's disease, but causes cognitive side effects such as impulsivity. This model from Frank (2006) simulates the role of the subthalamic nucleus (STN) within the basal ganglia circuitry in decision making. The STN dynamically modulates network decision thresholds in proportion to decision conflict. The STN ``hold your horses'' signal adaptively allows the system more time to settle on the best choice when multiple options are valid. The model also replicates effects in Parkinson's patients on and off DBS in experiments designed to test the model (Frank et al, 2007).",
- "tags": [
- {
- "id": 771,
- "tag": "Action Selection/Decision Making"
- },
- {
- "id": 831,
- "tag": "Deep brain stimulation"
- },
- {
- "id": 807,
- "tag": "Emergent/PDPplusplus"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 801,
- "tag": "Parkinson's"
- },
- {
- "id": 791,
- "tag": "Rate-coding model neurons"
- },
- {
- "id": 573,
- "tag": "Rebound firing"
- },
- {
- "id": 809,
- "tag": "Reinforcement Learning"
- },
- {
- "id": 569,
- "tag": "Simplified Models"
- },
- {
- "id": 725,
- "tag": "Synaptic Plasticity"
- },
- {
- "id": 1205,
- "tag": "ModelDB:97972"
- }
- ],
- "timestamp_created": "2024-01-11 15:26:05.289637+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/97972",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "735": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 735,
- "name": "Neuronal population models of intracerebral EEG (Wendling et al. 2005)",
- "repository_type": "github",
- "summary": "\"... In this study, the authors relate electrophysiologic patterns typically observed during the transition from interictal to ictal activity in human mesial temporal lobe epilepsy (MTLE) to mechanisms (at a neuronal population level) involved in seizure generation through a computational model of EEG activity. Intracerebral EEG signals recorded from hippocampus in five patients with MTLE during four periods (during interictal activity, just before seizure onset, during seizure onset, and during ictal activity) were used to identify the three main parameters of a model of hippocampus EEG activity (related to excitation, slow dendritic inhibition and fast somatic inhibition). ... . Results demonstrated that the model generates very realistic signals for automatically identified parameters. They also showed that the transition from interictal to ictal activity cannot be simply explained by an increase in excitation and a decrease in inhibition but rather by time-varying ensemble interactions between pyramidal cells and local interneurons projecting to either their dendritic or perisomatic region (with slow and fast GABAA kinetics). Particularly, during preonset activity, an increasing dendritic GABAergic inhibition compensates a gradually increasing excitation up to a brutal drop at seizure onset when faster oscillations (beta and low gamma band, 15 to 40 Hz) are observed. ... These findings obtained from model identification in human temporal lobe epilepsy are in agreement with some results obtained experimentally, either on animal models of epilepsy or on the human epileptic tissue.\"",
- "tags": [
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 469,
- "tag": "Epilepsy"
- },
- {
- "id": 836,
- "tag": "GNUstep NeXTStep/OpenStep"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 791,
- "tag": "Rate-coding model neurons"
- },
- {
- "id": 720,
- "tag": "Temporal Pattern Generation"
- },
- {
- "id": 1206,
- "tag": "ModelDB:97983"
- }
- ],
- "timestamp_created": "2024-01-11 15:26:06.022723+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/97983",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "736": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 736,
- "name": "Fully Implicit Parallel Simulation of Single Neurons (Hines et al. 2008)",
- "repository_type": "github",
- "summary": "A 3-d reconstructed\r\nneuron model can be simulated in parallel on a dozen or so processors and experience almost linear\r\nspeedup. Network models can be simulated when\r\nthere are more processors than cells.\r\n",
- "tags": [
- {
- "id": 756,
- "tag": "Methods"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 1207,
- "tag": "ModelDB:97985"
- }
- ],
- "timestamp_created": "2024-01-11 15:27:36.848723+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/97985",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "737": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 737,
- "name": "Theta phase precession in a model CA3 place cell (Baker and Olds 2007)",
- "repository_type": "github",
- "summary": "\"... The present study concerns a neurobiologically based computational model of the emergence of theta phase precession in which the responses of a single model CA3 pyramidal cell are examined in the context of stimulation by realistic afferent spike trains including those of place cells in entorhinal cortex, dentate gyrus, and other CA3 pyramidal cells. \r\nSpike-timing dependent plasticity in the model CA3 pyramidal cell leads to a spatially correlated associational synaptic drive that subsequently creates a spatially asymmetric expansion of the model cell\u2019s place field. ...\r\nThrough selective manipulations of the model it is possible to decompose theta phase precession in CA3 into the separate contributing factors of inheritance from upstream afferents in the dentate gyrus and entorhinal cortex, the interaction of synaptically controlled increasing afferent drive with phasic inhibition, and the theta phase difference between dentate gyrus granule cell and CA3 pyramidal cell activity.\"",
- "tags": [
- {
- "id": 579,
- "tag": "Active Dendrites"
- },
- {
- "id": 755,
- "tag": "C or Cplusplus program"
- },
- {
- "id": 572,
- "tag": "Calcium dynamics"
- },
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 591,
- "tag": "I K,leak"
- },
- {
- "id": 589,
- "tag": "I L high threshold"
- },
- {
- "id": 580,
- "tag": "I M"
- },
- {
- "id": 805,
- "tag": "I Mixed"
- },
- {
- "id": 721,
- "tag": "I N"
- },
- {
- "id": 739,
- "tag": "I Na,p"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 575,
- "tag": "I T low threshold"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 825,
- "tag": "Learning"
- },
- {
- "id": 749,
- "tag": "Long-term Synaptic Plasticity"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 756,
- "tag": "Methods"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 799,
- "tag": "Place cell/field"
- },
- {
- "id": 809,
- "tag": "Reinforcement Learning"
- },
- {
- "id": 802,
- "tag": "STDP"
- },
- {
- "id": 724,
- "tag": "Short-term Synaptic Plasticity"
- },
- {
- "id": 569,
- "tag": "Simplified Models"
- },
- {
- "id": 725,
- "tag": "Synaptic Plasticity"
- },
- {
- "id": 1208,
- "tag": "ModelDB:98003"
- }
- ],
- "timestamp_created": "2024-01-11 15:27:37.361218+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/98003",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "738": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 738,
- "name": "D2 dopamine receptor modulation of interneuronal activity (Maurice et al. 2004)",
- "repository_type": "github",
- "summary": "\"... Using a combination of electrophysiological, molecular, and computational approaches, the studies reported here show that D2 dopamine receptor modulation of Na+ currents underlying autonomous spiking contributes to a slowing of discharge rate, such as that seen in vivo. Four lines of evidence support this conclusion. ... Fourth, simulation of cholinergic interneuron pacemaking revealed that a modest increase in the entry of Na+ channels into the slow-inactivated state was sufficient to account for the slowing of pacemaker discharge. These studies establish a cellular mechanism linking dopamine and the reduction in striatal cholinergic interneuron activity seen in the initial stages of associative learning.\" See paper for more and details.",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 801,
- "tag": "Parkinson's"
- },
- {
- "id": 1209,
- "tag": "ModelDB:98005"
- }
- ],
- "timestamp_created": "2024-01-11 15:27:37.921829+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/98005",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "739": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 739,
- "name": "Fronto-parietal visuospatial WM model with HH cells (Edin et al 2007)",
- "repository_type": "github",
- "summary": "1) J Cogn Neurosci: 3 structural mechanisms that had been hypothesized to underlie vsWM development during childhood were evaluated by simulating the model and comparing results to fMRI. It was concluded that inter-regional synaptic connection strength cause vsWM development.\r\n\r\n2) J Integr Neurosci: Given the importance of fronto-parietal connections, we tested whether connection asymmetry affected resistance to distraction. We drew the conclusion that stronger frontal connections are beneficial. By comparing model results to EEG, we concluded that the brain indeed has stronger frontal-to-parietal connections than vice versa.",
- "tags": [
- {
- "id": 718,
- "tag": "Attractor Neural Network"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 794,
- "tag": "Working memory"
- },
- {
- "id": 1210,
- "tag": "ModelDB:98017"
- }
- ],
- "timestamp_created": "2024-01-11 15:27:38.443640+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/98017",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "740": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 740,
- "name": "Studies of stimulus parameters for seizure disruption using NN simulations (Anderson et al. 2007)",
- "repository_type": "github",
- "summary": "Architecturally realistic neocortical model using seven classes of excitatory and inhibitory single compartment Hodgkin-Huxley cells. Wiring is adapted to minicolumn hypothesis and incorporates visual and neocortical data. Simulation demonstrates spontaneous bursting onset and cessation, and activity can be altered with external electric field.",
- "tags": [
- {
- "id": 566,
- "tag": "Bursting"
- },
- {
- "id": 755,
- "tag": "C or Cplusplus program"
- },
- {
- "id": 469,
- "tag": "Epilepsy"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 591,
- "tag": "I K,leak"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 726,
- "tag": "Vision"
- },
- {
- "id": 1211,
- "tag": "ModelDB:98902"
- }
- ],
- "timestamp_created": "2024-01-11 15:27:39.327837+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/98902",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "741": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 741,
- "name": "ERG current in repolarizing plateau potentials in dopamine neurons (Canavier et al 2007)",
- "repository_type": "github",
- "summary": "\"Blocking the small-conductance (SK) calcium-activated potassium channel promotes\r\nburst firing in dopamine neurons both in vivo and in vitro.\r\n...\r\nWe focus on the underlying plateau potential\r\noscillation generated in the presence of both apamin and TTX, so that\r\naction potentials are not considered. \r\n\r\nWe find that although the plateau\r\npotentials are mediated by a voltage-gated Ca2+ current, they do not\r\ndepend on the accumulation of cytosolic Ca2+, then use a computational\r\nmodel to test the hypothesis that the slowly voltage-activated\r\nether-a-go-go\u2013related gene (ERG) potassium current repolarizes the\r\nplateaus.\r\n\r\nThe model, which includes a material balance on calcium,\r\nis able to reproduce the time course of both membrane potential\r\nand somatic calcium concentration, and can also mimic the induction\r\nof plateau potentials by the calcium chelator BAPTA.\" See paper for more.",
- "tags": [
- {
- "id": 755,
- "tag": "C or Cplusplus program"
- },
- {
- "id": 572,
- "tag": "Calcium dynamics"
- },
- {
- "id": 710,
- "tag": "FORTRAN"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 589,
- "tag": "I L high threshold"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 789,
- "tag": "I_HERG"
- },
- {
- "id": 567,
- "tag": "Ion Channel Kinetics"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 1212,
- "tag": "ModelDB:100603"
- }
- ],
- "timestamp_created": "2024-01-11 15:27:39.835320+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/100603",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "742": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 742,
- "name": "CA3 pyramidal neuron: firing properties (Hemond et al. 2008)",
- "repository_type": "github",
- "summary": "In the paper, this model was used to identify how relative differences in K+ conductances,\r\nspecifically KC, KM, & KD, between cells contribute to the different characteristics of the\r\nthree types of firing patterns observed experimentally.\r\n",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 579,
- "tag": "Active Dendrites"
- },
- {
- "id": 566,
- "tag": "Bursting"
- },
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 731,
- "tag": "I CAN"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 589,
- "tag": "I L high threshold"
- },
- {
- "id": 580,
- "tag": "I M"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 575,
- "tag": "I T low threshold"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 1213,
- "tag": "ModelDB:101629"
- }
- ],
- "timestamp_created": "2024-01-11 15:27:40.355684+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/101629",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "743": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 743,
- "name": "Leech S Cell: Modulation of Excitability by Serotonin (Burrell and Crisp 2008)",
- "repository_type": "github",
- "summary": "Serotonergic modulation of the afterhyperpolarization (AHP) contributes to the regulation of the excitability of the leech S cell, a neuron critical for sensitization of the shortening reflex. Pharmacological and physiological data suggest that three currents contribute to the S cell's afterhyperpolarization: a charybdotoxin-sensitive, fast calcium-dependent potassium current (fAHP); a tubocurare-sensitive, calcium-dependent potassium current (mAHP); and, a saxitoxin-sensitive, afterdepolarization current (ADP). This single-compartment model of the S cell is constructed using fAHP, mAHP and ADP currents, and shows that reduction of the conductances to mimic the effects of serotonin is sufficient to enhance excitability (repetitive firing).",
- "tags": [
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 591,
- "tag": "I K,leak"
- },
- {
- "id": 589,
- "tag": "I L high threshold"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 757,
- "tag": "SNNAP"
- },
- {
- "id": 1214,
- "tag": "ModelDB:102279"
- }
- ],
- "timestamp_created": "2024-01-11 15:27:40.872502+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/102279",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "744": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 744,
- "name": "O-LM interneuron model (Lawrence et al. 2006)",
- "repository_type": "github",
- "summary": "Exploring the kinetics and distribution of the muscarinic potassium channel, IM, in 2 O-LM interneuron morphologies. Modulation of the ion channel by drugs such as XE991 (antagonist) and retigabine (agonist) are simulated in the models to examine the role of IM in spiking properties.",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 591,
- "tag": "I K,leak"
- },
- {
- "id": 589,
- "tag": "I L high threshold"
- },
- {
- "id": 580,
- "tag": "I M"
- },
- {
- "id": 721,
- "tag": "I N"
- },
- {
- "id": 575,
- "tag": "I T low threshold"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 567,
- "tag": "Ion Channel Kinetics"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 1215,
- "tag": "ModelDB:102288"
- }
- ],
- "timestamp_created": "2024-01-11 15:27:41.364985+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/102288",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "745": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 745,
- "name": "Elementary mechanisms producing facilitation of Cav2.1 (P/Q-type) channels",
- "repository_type": "github",
- "summary": "\"The regulation of Ca(V)2.1 (P/Q-type) channels by calmodulin (CaM) showcases the powerful Ca(2+) decoding capabilities of CaM in complex with the family of Ca(V)1-2 Ca(2+) channels. \r\n\r\nThroughout this family, CaM does not simply exert a binary on/off regulatory effect; rather, Ca(2+) binding to either the C- or N-terminal lobe of CaM alone can selectively trigger a distinct form of channel modulation. \r\n...\r\nCa(2+) binding to the C-terminal lobe induces Ca(2+)-dependent facilitation of opening (CDF), whereas the N-terminal lobe yields Ca(2+)-dependent inactivation of opening (CDI). \r\n...\r\nFurthermore, direct single-channel determinations of channel open probability (P(o)) and kinetic simulations demonstrate that CDF represents a genuine enhancement of open probability, without appreciable change of activation kinetics. \r\nThis enhanced-opening mechanism suggests that the CDF evoked during action-potential trains would produce not only larger, but longer-lasting Ca(2+) responses, an outcome with potential ramifications for short-term synaptic plasticity.\"\r\n",
- "tags": [
- {
- "id": 723,
- "tag": "Facilitation"
- },
- {
- "id": 742,
- "tag": "I p,q"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1216,
- "tag": "ModelDB:102871"
- }
- ],
- "timestamp_created": "2024-01-11 15:27:41.883254+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/102871",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "746": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 746,
- "name": "Ionic basis of alternans and Timothy Syndrome (Fox et al. 2002), (Zhu and Clancy 2007)",
- "repository_type": "github",
- "summary": "From Zhu and Clancy: \"... Here we\r\nemploy theoretical simulations to examine the effects of a Timothy Syndrome (TS) mutation\r\nin the L-type Ca2+ channel on cardiac dynamics over multiple\r\nscales, from a gene mutation to protein, cell, tissue, and finally the\r\nECG, to connect a defective Ca2+ channel to arrhythmia susceptibility. ...\"",
- "tags": [
- {
- "id": 755,
- "tag": "C or Cplusplus program"
- },
- {
- "id": 737,
- "tag": "Heart disease"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 589,
- "tag": "I L high threshold"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 783,
- "tag": "I_Ks"
- },
- {
- "id": 785,
- "tag": "Long-QT"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 738,
- "tag": "Na/Ca exchanger"
- },
- {
- "id": 740,
- "tag": "Na/K pump"
- },
- {
- "id": 741,
- "tag": "Sodium pump"
- },
- {
- "id": 720,
- "tag": "Temporal Pattern Generation"
- },
- {
- "id": 837,
- "tag": "Timothy Syndrome"
- },
- {
- "id": 1217,
- "tag": "ModelDB:104623"
- }
- ],
- "timestamp_created": "2024-01-11 15:27:42.374105+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/104623",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "747": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 747,
- "name": "Excitation-contraction coupling/mitochondrial energetics (ECME) model (Cortassa et al. 2006)",
- "repository_type": "github",
- "summary": "\"An intricate network of reactions is involved in matching energy supply with demand in the heart. This complexity\r\narises because energy production both modulates and is modulated by the electrophysiological and contractile activity of the\r\ncardiac myocyte. Here, we present an integrated mathematical model of the cardiac cell that links excitation-contraction\r\ncoupling with mitochondrial energy generation. The dynamics of the model are described by a system of 50 ordinary differential\r\nequations. The formulation explicitly incorporates cytoplasmic ATP-consuming processes associated with force generation and\r\nion transport, as well as the creatine kinase reaction. Changes in the electrical and contractile activity of the myocyte are\r\ncoupled to mitochondrial energetics through the ATP, Ca21, and Na1 concentrations in the myoplasmic and mitochondrial\r\nmatrix compartments. ...\"",
- "tags": [
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 755,
- "tag": "C or Cplusplus program"
- },
- {
- "id": 572,
- "tag": "Calcium dynamics"
- },
- {
- "id": 589,
- "tag": "I L high threshold"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 818,
- "tag": "I_SERCA"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 738,
- "tag": "Na/Ca exchanger"
- },
- {
- "id": 751,
- "tag": "Signaling pathways"
- },
- {
- "id": 720,
- "tag": "Temporal Pattern Generation"
- },
- {
- "id": 1218,
- "tag": "ModelDB:105383"
- }
- ],
- "timestamp_created": "2024-01-11 15:27:42.903289+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/105383",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "748": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 748,
- "name": "Nav1.6 sodium channel model in globus pallidus neurons (Mercer et al. 2007)",
- "repository_type": "github",
- "summary": "Model files for the paper Mercer JN, Chan CS, Tkatch T, Held J, Surmeier DJ. Nav1.6 sodium channels are critical to pacemaking and fast spiking in globus pallidus neurons.,J Neurosci. 2007 Dec 5;27(49):13552-66.",
- "tags": [
- {
- "id": 727,
- "tag": "Action Potential Initiation"
- },
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 739,
- "tag": "I Na,p"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 801,
- "tag": "Parkinson's"
- },
- {
- "id": 1219,
- "tag": "ModelDB:105385"
- }
- ],
- "timestamp_created": "2024-01-11 15:27:43.434619+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/105385",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "749": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 749,
- "name": "Temporal integration by stochastic recurrent network (Okamoto et al. 2007)",
- "repository_type": "github",
- "summary": "\"Temporal integration of externally or internally\r\ndriven information is required for a variety of cognitive\r\nprocesses. This computation is generally linked with graded rate\r\nchanges in cortical neurons, which typically appear during a delay\r\nperiod of cognitive task in the prefrontal and other cortical areas.\r\nHere, we present a neural network model to produce graded (climbing\r\nor descending) neuronal activity. Model neurons are interconnected\r\nrandomly by AMPA-receptor\u2013mediated fast excitatory synapses and\r\nare subject to noisy background excitatory and inhibitory synaptic\r\ninputs. In each neuron, a prolonged afterdepolarizing potential follows\r\nevery spike generation. Then, driven by an external input, the individual\r\nneurons display bimodal rate changes between a baseline state\r\nand an elevated firing state, with the latter being sustained by regenerated\r\nafterdepolarizing potentials. ...\"",
- "tags": [
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 755,
- "tag": "C or Cplusplus program"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1220,
- "tag": "ModelDB:105501"
- }
- ],
- "timestamp_created": "2024-01-11 15:27:44.073303+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/105501",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "750": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 750,
- "name": "A dual-Ca2+-sensor model for neurotransmitter release in a central synapse (Sun et al. 2007)",
- "repository_type": "github",
- "summary": "\"Ca2+-triggered synchronous neurotransmitter release is well described, but asynchronous release-in fact, its very existence-remains enigmatic. \r\nHere we report a quantitative description of asynchronous neurotransmitter release in calyx-of-Held synapses. \r\n...\r\nOur results reveal that release triggered in wild-type synapses at low Ca2+ concentrations is physiologically asynchronous, and that asynchronous release completely empties the readily releasable pool of vesicles during sustained elevations of Ca2+. \r\nWe propose a dual-Ca2+-sensor model of release that quantitatively describes the contributions of synchronous and asynchronous release under conditions of different presynaptic Ca2+ dynamics.\"",
- "tags": [
- {
- "id": 572,
- "tag": "Calcium dynamics"
- },
- {
- "id": 820,
- "tag": "IGOR Pro"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1221,
- "tag": "ModelDB:105506"
- }
- ],
- "timestamp_created": "2024-01-11 15:27:44.739858+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/105506",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "751": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 751,
- "name": "Tonic-clonic transitions in a seizure simulation (Lytton and Omurtag 2007)",
- "repository_type": "github",
- "summary": "\"... The authors have ... computationally manageable networks of moderate size consisting of 1,000 to 3,000 neurons with multiple intrinsic\r\nand synaptic properties. \r\n\r\nExperiments on these simulations demonstrated the presence of epileptiform behavior in the form of\r\nrepetitive high-intensity population events (clonic behavior) or\r\nlatch-up with near maximal activity (tonic behavior). \r\n\r\n...\r\nSeveral simulations revealed the importance of random coincident inputs to shift a network from\r\na low-activation to a high-activation epileptiform state. Finally, a\r\nsimulated anticonvulsant acting on excitability tended to preferentially\r\ndecrease tonic activity.\"\r\n",
- "tags": [
- {
- "id": 469,
- "tag": "Epilepsy"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 1222,
- "tag": "ModelDB:105507"
- }
- ],
- "timestamp_created": "2024-01-11 15:27:45.363204+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/105507",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "752": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 752,
- "name": "Effect of riluzole on action potential in cultured human skeletal muscle cells (Wang YJ et al. 2008)",
- "repository_type": "github",
- "summary": "Simulation studies also unraveled that both decreased conductance of I(Na) and increased conductance of I(K(Ca)) utilized to mimic riluzole\r\nactions in skeletal muscle cells could combine to decrease the amplitude of action potentials and increase the repolarization of action potentials.",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 759,
- "tag": "XPPAUT"
- },
- {
- "id": 1223,
- "tag": "ModelDB:105528"
- }
- ],
- "timestamp_created": "2024-01-11 15:27:45.912480+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/105528",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "753": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 753,
- "name": "CA1 pyramidal neuron: calculation of MRI signals (Cassara et al. 2008)",
- "repository_type": "github",
- "summary": "NEURON mod files from the paper:\r\nCassar\u00e0 AM, Hagberg GE, Bianciardi M, Migliore M, Maraviglia B.\r\nRealistic simulations of neuronal activity: A contribution to the debate on direct detection of neuronal currents by MRI.\r\nNeuroimage. 39:87-106 (2008).\r\n\r\nIn this paper, we use a detailed calculation of the magnetic field produced by the neuronal \r\ncurrents propagating over a hippocampal CA1 pyramidal neuron placed inside a cubic MR voxel of \r\nlength 1.2 mm to estimate the Magnetic Resonance signal.\r\n",
- "tags": [
- {
- "id": 579,
- "tag": "Active Dendrites"
- },
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 734,
- "tag": "Extracellular Fields"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 1224,
- "tag": "ModelDB:106551"
- }
- ],
- "timestamp_created": "2024-01-11 15:27:46.666266+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/106551",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "754": {
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- "modeling"
- ],
- "default_context": "master",
- "id": 754,
- "name": "JitCon: Just in time connectivity for large spiking networks (Lytton et al. 2008)",
- "repository_type": "github",
- "summary": "This simulation is primarily an illustration and is not well optimized for actually running large\r\n networks.\r\njitcon.mod contains a large amount of C level code, understanding of which requires some\r\n knowledge of Neuron internals",
- "tags": [
- {
- "id": 469,
- "tag": "Epilepsy"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 1225,
- "tag": "ModelDB:106891"
- }
- ],
- "timestamp_created": "2024-01-11 15:27:47.156808+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/106891",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "755": {
- "auto_sync": true,
- "content_types": "modeling",
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- "modeling"
- ],
- "default_context": "master",
- "id": 755,
- "name": "Calcium spikes in basal dendrites (Kampa and Stuart 2006)",
- "repository_type": "github",
- "summary": "This model was published in Kampa & Stuart (2006) J Neurosci 26(28):7424-32. The simulation creates two plots showing voltage and calcium changes in basal dendrites of layer 5 pyramidal neurons during action potential backpropagation. \r\n\r\ncreated by B. Kampa (2006)",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 579,
- "tag": "Active Dendrites"
- },
- {
- "id": 572,
- "tag": "Calcium dynamics"
- },
- {
- "id": 565,
- "tag": "Dendritic Action Potentials"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 589,
- "tag": "I L high threshold"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 582,
- "tag": "I Sodium"
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- {
- "id": 575,
- "tag": "I T low threshold"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 596,
- "tag": "Synaptic Integration"
- },
- {
- "id": 1226,
- "tag": "ModelDB:108458"
- }
- ],
- "timestamp_created": "2024-01-11 15:27:47.648051+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/108458",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "756": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 756,
- "name": "STDP depends on dendritic synapse location (Letzkus et al. 2006)",
- "repository_type": "github",
- "summary": "This model was published in Letzkus, Kampa & Stuart (2006) J Neurosci 26(41):10420-9. The simulation creates several plots showing voltage and NMDA current and conductance changes at different apical dendritic locations in layer 5 pyramidal neurons during STDP induction protocols. \r\n\r\nCreated by B. Kampa (2006).",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 579,
- "tag": "Active Dendrites"
- },
- {
- "id": 566,
- "tag": "Bursting"
- },
- {
- "id": 572,
- "tag": "Calcium dynamics"
- },
- {
- "id": 565,
- "tag": "Dendritic Action Potentials"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 589,
- "tag": "I L high threshold"
- },
- {
- "id": 580,
- "tag": "I M"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 575,
- "tag": "I T low threshold"
- },
- {
- "id": 749,
- "tag": "Long-term Synaptic Plasticity"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 802,
- "tag": "STDP"
- },
- {
- "id": 725,
- "tag": "Synaptic Plasticity"
- },
- {
- "id": 1227,
- "tag": "ModelDB:108459"
- }
- ],
- "timestamp_created": "2024-01-11 15:27:48.198892+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/108459",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "757": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 757,
- "name": "A microcircuit model of the frontal eye fields (Heinzle et al. 2007)",
- "repository_type": "github",
- "summary": "\" ... we show that the canonical circuit (Douglas et al. 1989, Douglas and Martin 1991) can,\r\nwith a few modifications, model the primate FEF. The spike-based network of integrate-and-fire neurons was tested in tasks that were\r\nused in electrophysiological experiments in behaving macaque monkeys. The dynamics of the model matched those of neurons observed\r\nin the FEF, and the behavioral results matched those observed in psychophysical experiments. The close relationship between the model\r\nand the cortical architecture allows a detailed comparison of the simulation results with physiological data and predicts details of the\r\nanatomical circuit of the FEF.\"",
- "tags": [
- {
- "id": 771,
- "tag": "Action Selection/Decision Making"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 587,
- "tag": "Spatio-temporal Activity Patterns"
- },
- {
- "id": 726,
- "tag": "Vision"
- },
- {
- "id": 1228,
- "tag": "ModelDB:110022"
- }
- ],
- "timestamp_created": "2024-01-11 15:27:48.744047+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/110022",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "758": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 758,
- "name": "Space clamp problems in neurons with voltage-gated conductances (Bar-Yehuda and Korngreen 2008)",
- "repository_type": "github",
- "summary": "\" ... using numerical simulations, we show that the distortions of voltage-gated K+ and Ca2+ currents are substantial even in neurons with short dendrites. The simulations also demonstrate that passive cable theory cannot be used to justify voltage-clamping of neurons, due to significant shunting to the reversal potential of the voltage-gated conductance during channel activation.\r\n... \"",
- "tags": [
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 570,
- "tag": "Influence of Dendritic Geometry"
- },
- {
- "id": 567,
- "tag": "Ion Channel Kinetics"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 1229,
- "tag": "ModelDB:110560"
- }
- ],
- "timestamp_created": "2024-01-11 15:27:49.264577+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/110560",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "759": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 759,
- "name": "Thalamic transformation of pallidal input (Hadipour-Niktarash 2006)",
- "repository_type": "github",
- "summary": "\"In Parkinson\u2019s disease, neurons of the internal segment of the globus pallidus (GPi) display the low-frequency tremor-related oscillations.\r\n\r\nThese oscillatory activities are transmitted to the thalamic relay nuclei.\r\n\r\nComputer models of the interacting thalamocortical (TC) and thalamic reticular (RE) neurons were used to explore how the TC-RE network processes the low-frequency oscillations of the GPi neurons. ...\"\r\n",
- "tags": [
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 575,
- "tag": "I T low threshold"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 801,
- "tag": "Parkinson's"
- },
- {
- "id": 1230,
- "tag": "ModelDB:111870"
- }
- ],
- "timestamp_created": "2024-01-11 15:27:49.774817+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/111870",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "760": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 760,
- "name": "Ca-dependent K Channel: kinetics from rat muscle (Moczydlowski, Latorre 1983) XPP",
- "repository_type": "github",
- "summary": "This is an XPP version of the classic KCa channel from Moczydlowski and Latorre 1983.",
- "tags": [
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 567,
- "tag": "Ion Channel Kinetics"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 759,
- "tag": "XPPAUT"
- },
- {
- "id": 1231,
- "tag": "ModelDB:111877"
- }
- ],
- "timestamp_created": "2024-01-11 15:27:50.236614+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/111877",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "761": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 761,
- "name": "Thalamocortical model of spike and wave seizures (Suffczynski et al. 2004)",
- "repository_type": "github",
- "summary": "SIMULINK macroscopic model of transitions between normal (spindle) activity and spike and wave (SW) discharges in the thalamocortical network. The model exhibits bistability properties and stochastic fluctuations present in the network may flip the system between the two operational states. The predictions of the model were compared with real EEG data in rats and humans. A possibility to abort an ictal state by a single counter stimulus is suggested by the model. \r\n",
- "tags": [
- {
- "id": 469,
- "tag": "Epilepsy"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 575,
- "tag": "I T low threshold"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 824,
- "tag": "Simulink"
- },
- {
- "id": 593,
- "tag": "Spindles"
- },
- {
- "id": 1232,
- "tag": "ModelDB:111880"
- }
- ],
- "timestamp_created": "2024-01-11 15:27:50.793670+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/111880",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "762": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 762,
- "name": "Kinetic properties of voltage gated Na channel (Nayak and Sikdar 2007)",
- "repository_type": "github",
- "summary": "Here we illustrate novel non-linear properties of voltage gated Na+ channel induced by sustained membrane depolarization. In cell-attached patch clamp recordings of rNav1.2 channels expressed in CHO cells, we found complex non-linear changes in the molecular kinetic properties, including channel dwell times and unitary conductance of single Na+ channels that were dependent on the extent of conditioning membrane depolarization.\r\nA \u201cmolecular memory\u201d phenomenon arises at longer depolarization characterized by clusters of dwell time events and strong autocorrelation in dwell times. Hidden Markov Modeling (HMM) ... suggested a possible explanation to the memory phenomenon.\r\nSee paper for more and details.",
- "tags": [
- {
- "id": 469,
- "tag": "Epilepsy"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 567,
- "tag": "Ion Channel Kinetics"
- },
- {
- "id": 748,
- "tag": "Markov-type model"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 838,
- "tag": "Yale HMM"
- },
- {
- "id": 1233,
- "tag": "ModelDB:111967"
- }
- ],
- "timestamp_created": "2024-01-11 15:27:51.265419+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/111967",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "763": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 763,
- "name": "Properties of aconitine-induced block of KDR current in NG108-15 neurons (Lin et al. 2008)",
- "repository_type": "github",
- "summary": "\"The effects of aconitine (ACO), a highly toxic alkaloid, on ion currents in differentiated NG108-15 neuronal cells were investigated in this study. ACO (0.3-30 microM) suppressed the amplitude of delayed rectifier K+ current (IK(DR)) in a concentration-dependent manner with an IC50 value of 3.1 microM. The presence of ACO enhanced the rate and extent of IK(DR) inactivation, although it had no effect on the initial activation phase of IK(DR). ... A modeled cell was designed to duplicate its inhibitory effect on spontaneous pacemaking. ... Taken together, the experimental data and simulations show that ACO can block delayed rectifier K+ channels of neurons in a concentration- and state-dependent manner. Changes in action potentials induced by ACO in neurons in vivo can be explained mainly by its blocking actions on IK(DR) and INa.\"",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 769,
- "tag": "I_KHT"
- },
- {
- "id": 567,
- "tag": "Ion Channel Kinetics"
- },
- {
- "id": 756,
- "tag": "Methods"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 569,
- "tag": "Simplified Models"
- },
- {
- "id": 759,
- "tag": "XPPAUT"
- },
- {
- "id": 1234,
- "tag": "ModelDB:112079"
- }
- ],
- "timestamp_created": "2024-01-11 15:27:51.817919+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/112079",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "764": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 764,
- "name": "Carbon nanotubes as electrical interfaces to neurons (Giugliano et al. 2008)",
- "repository_type": "github",
- "summary": "In the present NEURON model, we explore simple phenomenological models of the extracellular coupling, occurring at the neuron-metal microelectrode junction and (possibly) at the neuron-carbon nanotube junction.",
- "tags": [
- {
- "id": 734,
- "tag": "Extracellular Fields"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 1235,
- "tag": "ModelDB:112086"
- }
- ],
- "timestamp_created": "2024-01-11 15:27:52.292483+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/112086",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "765": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 765,
- "name": "Activity constraints on stable neuronal or network parameters (Olypher and Calabrese 2007)",
- "repository_type": "github",
- "summary": "\"In this study, we developed a general description of parameter combinations for which specified\r\ncharacteristics of neuronal or network activity are constant.\r\nOur approach is based on the implicit function theorem and is applicable\r\nto activity characteristics that smoothly depend on parameters.\r\nSuch smoothness is often intrinsic to neuronal systems when they are in\r\nstable functional states.\r\nThe conclusions about how parameters compensate each other, developed in this study, can thus be used even\r\nwithout regard to the specific mathematical model describing a particular\r\nneuron or neuronal network. ...\"",
- "tags": [
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 575,
- "tag": "I T low threshold"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 767,
- "tag": "MATLAB (web link to model)"
- },
- {
- "id": 756,
- "tag": "Methods"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1236,
- "tag": "ModelDB:112348"
- }
- ],
- "timestamp_created": "2024-01-11 15:27:52.765620+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/112348",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "766": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 766,
- "name": "Nigral dopaminergic neurons: effects of ethanol on Ih (Migliore et al. 2008)",
- "repository_type": "github",
- "summary": "We use a realistic computational model of dopaminergic neurons in vivo to suggest \r\nthat ethanol, through its effects on Ih, modifies the temporal structure of the spiking \r\nactivity. The model predicts that the dopamine level may increase much more during bursting \r\nthan pacemaking activity, especially in those brain regions with a slow dopamine clearance rate. \r\nThe results suggest that a selective pharmacological remedy could thus be devised against the \r\nrewarding effects of ethanol that are postulated to mediate alcohol abuse and addiction, \r\ntargeting the specific HCN genes expressed in dopaminergic neurons.",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 579,
- "tag": "Active Dendrites"
- },
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 839,
- "tag": "Alcohol Use Disorder"
- },
- {
- "id": 566,
- "tag": "Bursting"
- },
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 591,
- "tag": "I K,leak"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 740,
- "tag": "Na/K pump"
- },
- {
- "id": 787,
- "tag": "Pathophysiology"
- },
- {
- "id": 741,
- "tag": "Sodium pump"
- },
- {
- "id": 1237,
- "tag": "ModelDB:112359"
- }
- ],
- "timestamp_created": "2024-01-11 15:27:53.376969+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/112359",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "767": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 767,
- "name": "CellExcite: an efficient simulation environment for excitable cells (Bartocci et al. 2008)",
- "repository_type": "github",
- "summary": "\"We have developed CellExcite, a sophisticated simulation environment for excitable-cell networks. CellExcite allows the user to sketch a tissue of excitable cells, plan the stimuli to be applied during simulation, and customize the diffusion model. CellExcite adopts Hybrid Automata (HA) as the computational model in order to efficiently capture both discrete and continuous excitable-cell behavior.\"",
- "tags": [
- {
- "id": 840,
- "tag": "CellExcite"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 569,
- "tag": "Simplified Models"
- },
- {
- "id": 587,
- "tag": "Spatio-temporal Activity Patterns"
- },
- {
- "id": 1238,
- "tag": "ModelDB:112468"
- }
- ],
- "timestamp_created": "2024-01-11 15:27:53.853185+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/112468",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "768": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 768,
- "name": "CA1 pyramidal neuron: functional significance of axonal Kv7 channels (Shah et al. 2008)",
- "repository_type": "github",
- "summary": "The model used in this paper confirmed the experimental findings suggesting that axonal Kv7 channels are critically and uniquely required for determining the inherent spontaneous firing of \r\nhippocampal CA1 pyramids, independently of alterations in synaptic activity. \r\nThe model predicts that the axonal Kv7 density could be 3-5 times that at the soma.",
- "tags": [
- {
- "id": 727,
- "tag": "Action Potential Initiation"
- },
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 728,
- "tag": "Axonal Action Potentials"
- },
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 580,
- "tag": "I M"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 575,
- "tag": "I T low threshold"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 1239,
- "tag": "ModelDB:112546"
- }
- ],
- "timestamp_created": "2024-01-11 15:27:54.350438+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/112546",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "769": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 769,
- "name": "Spontaneous calcium oscillations in astrocytes (Lavrentovich and Hemkin 2008)",
- "repository_type": "github",
- "summary": "\" ... We propose here a mathematical model of how spontaneous Ca2+ \r\noscillations arise in astrocytes. This model uses the calcium-induced calcium release and inositol cross-coupling \r\nmechanisms coupled with a receptor-independent method for producing inositol (1,4,5)-trisphosphate as the heart \r\nof the model. By computationally mimicking experimental constraints we have found that this model provides \r\nresults that are qualitatively similar to experiment.\"",
- "tags": [
- {
- "id": 572,
- "tag": "Calcium dynamics"
- },
- {
- "id": 790,
- "tag": "Calcium waves"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 751,
- "tag": "Signaling pathways"
- },
- {
- "id": 569,
- "tag": "Simplified Models"
- },
- {
- "id": 759,
- "tag": "XPPAUT"
- },
- {
- "id": 1240,
- "tag": "ModelDB:112547"
- }
- ],
- "timestamp_created": "2024-01-11 15:27:54.834668+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/112547",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "770": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 770,
- "name": "Gap-junction coupled network activity depends on coupled dendrites diameter (Gansert et al. 2007)",
- "repository_type": "github",
- "summary": "\"... We have previously shown that the amplitude of electrical signals propagating across gap-junctionally coupled passive cables is maximized at a unique diameter. This suggests that threshold-dependent signals may propagate through gap junctions for a finite range of diameters around this optimal value. \r\nHere we examine the diameter dependence of action potential propagation across model networks of dendro-dendritically coupled neurons. The neurons in these models have passive soma and dendrites and an action potential-generating axon. We show that propagation of action potentials across gap junctions occurs only over a finite range of dendritic diameters and that propagation delay depends on this diameter. ...\". See paper for more and details.",
- "tags": [
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 604,
- "tag": "Network"
- },
- {
- "id": 569,
- "tag": "Simplified Models"
- },
- {
- "id": 587,
- "tag": "Spatio-temporal Activity Patterns"
- },
- {
- "id": 720,
- "tag": "Temporal Pattern Generation"
- },
- {
- "id": 1241,
- "tag": "ModelDB:112633"
- }
- ],
- "timestamp_created": "2024-01-11 15:27:55.422998+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/112633",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "771": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 771,
- "name": "Cerebellar Golgi cell (Solinas et al. 2007a, 2007b)",
- "repository_type": "github",
- "summary": "\"... Our results suggest that a complex complement of ionic mechanisms is needed to fine-tune separate aspects of the neuronal response dynamics. Simulations also suggest that the Golgi cell may exploit these mechanisms to obtain a fine regulation of timing of incoming mossy fiber responses and granular layer circuit oscillation and bursting.\"",
- "tags": [
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 580,
- "tag": "I M"
- },
- {
- "id": 739,
- "tag": "I Na,p"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 575,
- "tag": "I T low threshold"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 773,
- "tag": "neuroConstruct (web link to model)"
- },
- {
- "id": 1242,
- "tag": "ModelDB:112685"
- }
- ],
- "timestamp_created": "2024-01-11 15:27:55.904388+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/112685",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "772": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 772,
- "name": "Afferent Integration in the NAcb MSP Cell (Wolf et al. 2005)",
- "repository_type": "github",
- "summary": "\"We describe a computational model of the principal cell in the nucleus accumbens (NAcb), the medium spiny projection (MSP) neuron. \r\n\r\nThe model neuron, constructed in NEURON, includes all of the known ionic currents in these cells and receives synaptic input from simulated spike trains via NMDA, AMPA, and GABAA receptors. \r\n\r\n... results suggest that afferent information integration by the NAcb MSP cell may be compromised by pathology in which the NMDA current is altered or modulated, as has been proposed in both schizophrenia and addiction.\"\r\n",
- "tags": [
- {
- "id": 841,
- "tag": "Addiction"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 842,
- "tag": "I Krp"
- },
- {
- "id": 589,
- "tag": "I L high threshold"
- },
- {
- "id": 721,
- "tag": "I N"
- },
- {
- "id": 739,
- "tag": "I Na,p"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 843,
- "tag": "I Q"
- },
- {
- "id": 844,
- "tag": "I R"
- },
- {
- "id": 575,
- "tag": "I T low threshold"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 845,
- "tag": "Schizophrenia"
- },
- {
- "id": 1243,
- "tag": "ModelDB:112834"
- }
- ],
- "timestamp_created": "2024-01-11 15:27:56.436248+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/112834",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "773": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 773,
- "name": "Spike trains in Hodgkin\u2013Huxley model and ISIs of acupuncture manipulations (Wang et al. 2008)",
- "repository_type": "github",
- "summary": "The Hodgkin-Huxley equations (HH) are parameterized by a number of parameters \r\nand shows a variety of qualitatively different behaviors depending on the \r\nparameter values. Under stimulation of an external periodic voltage, the \r\nISIs (interspike intervals) of a HH model are investigated in this work, \r\nwhile the frequency of the voltage is taken as the controlling parameter. \r\nAs well-known, the science of acupuncture and moxibustion is an important \r\ncomponent of Traditional Chinese Medicine with a long history. Although there \r\nare a number of different acupuncture manipulations, the method for \r\ndistinguishing them is rarely investigated. With the idea of ISI, we study \r\nthe electrical signal time series at the spinal dorsal horn produced by \r\nthree different acupuncture manipulations in Zusanli point and present an \r\neffective way to distinguish them.\r\n",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 728,
- "tag": "Axonal Action Potentials"
- },
- {
- "id": 566,
- "tag": "Bursting"
- },
- {
- "id": 846,
- "tag": "Complementary and alternative medicine"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 569,
- "tag": "Simplified Models"
- },
- {
- "id": 759,
- "tag": "XPPAUT"
- },
- {
- "id": 1244,
- "tag": "ModelDB:112836"
- }
- ],
- "timestamp_created": "2024-01-11 15:27:56.930931+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/112836",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "774": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 774,
- "name": "Two-cell inhibitory network bursting dynamics captured in a one-dimensional map (Matveev et al 2007)",
- "repository_type": "github",
- "summary": "\" ... Here\r\nwe describe a simple method that allows us to investigate\r\nthe existence and stability of anti-phase bursting\r\nsolutions in a network of two spiking neurons, each\r\npossessing a T-type calcium current and coupled by\r\nreciprocal inhibition. \r\nWe derive a one-dimensional map\r\nwhich fully characterizes the genesis and regulation of\r\nanti-phase bursting arising from the interaction of the\r\nT-current properties with the properties of synaptic\r\ninhibition. ...\"",
- "tags": [
- {
- "id": 566,
- "tag": "Bursting"
- },
- {
- "id": 575,
- "tag": "I T low threshold"
- },
- {
- "id": 767,
- "tag": "MATLAB (web link to model)"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 1245,
- "tag": "ModelDB:112914"
- }
- ],
- "timestamp_created": "2024-01-11 15:27:57.406304+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/112914",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "775": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 775,
- "name": "Spikes,synchrony,and attentive learning by laminar thalamocort. circuits (Grossberg & Versace 2007)",
- "repository_type": "github",
- "summary": "\"... The model\r\nhereby clarifies, for the first time, how the following levels of brain organization coexist to realize\r\ncognitive processing properties that regulate fast learning and stable memory of brain representations:\r\nsingle cell properties, such as spiking dynamics, spike-timing-dependent plasticity (STDP), and\r\nacetylcholine modulation; detailed laminar thalamic and cortical circuit designs and their interactions;\r\naggregate cell recordings, such as current-source densities and local field potentials; and single cell and\r\nlarge-scale inter-areal oscillations in the gamma and beta frequency domains. ...\"",
- "tags": [
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 575,
- "tag": "I T low threshold"
- },
- {
- "id": 847,
- "tag": "KInNeSS (web link to model)"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 848,
- "tag": "NeuroML (web link to model)"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 719,
- "tag": "Pattern Recognition"
- },
- {
- "id": 802,
- "tag": "STDP"
- },
- {
- "id": 800,
- "tag": "Spatial Navigation"
- },
- {
- "id": 586,
- "tag": "Synchronization"
- },
- {
- "id": 794,
- "tag": "Working memory"
- },
- {
- "id": 829,
- "tag": "XML (web link to model)"
- },
- {
- "id": 1246,
- "tag": "ModelDB:112922"
- }
- ],
- "timestamp_created": "2024-01-11 15:27:58.023623+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/112922",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "776": {
- "auto_sync": true,
- "content_types": "modeling",
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- "modeling"
- ],
- "default_context": "master",
- "id": 776,
- "name": "Synchronization by D4 dopamine receptor-mediated phospholipid methylation (Kuznetsova, Deth 2008)",
- "repository_type": "github",
- "summary": "\"We describe a new molecular mechanism of\r\ndopamine-induced membrane protein modulation that\r\ncan tune neuronal oscillation frequency to attention related\r\ngamma rhythm. This mechanism is based on\r\nthe unique ability of D4 dopamine receptors (D4R)\r\nto carry out phospholipid methylation (PLM) that\r\nmay affect the kinetics of ion channels.\r\nWe show that by deceasing the inertia of the delayed rectifier potassium channel, a transition to 40 Hz oscillations can be achieved. ...\"",
- "tags": [
- {
- "id": 751,
- "tag": "Signaling pathways"
- },
- {
- "id": 569,
- "tag": "Simplified Models"
- },
- {
- "id": 586,
- "tag": "Synchronization"
- },
- {
- "id": 759,
- "tag": "XPPAUT"
- },
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 575,
- "tag": "I T low threshold"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 1247,
- "tag": "ModelDB:112968"
- }
- ],
- "timestamp_created": "2024-01-11 15:27:58.520452+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/112968",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "777": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 777,
- "name": "Stability of complex spike timing-dependent plasticity in cerebellar learning (Roberts 2007)",
- "repository_type": "github",
- "summary": "\"Dynamics of spike-timing dependent synaptic\r\nplasticity are analyzed for excitatory and inhibitory synapses\r\nonto cerebellar Purkinje cells. \r\n\r\nThe purpose of this study is\r\nto place theoretical constraints on candidate synaptic learning\r\nrules that determine the changes in synaptic efficacy\r\ndue to pairing complex spikes with presynaptic spikes in\r\nparallel fibers and inhibitory interneurons. \r\n...\"",
- "tags": [
- {
- "id": 849,
- "tag": "Java (web link to model)"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 802,
- "tag": "STDP"
- },
- {
- "id": 725,
- "tag": "Synaptic Plasticity"
- },
- {
- "id": 1248,
- "tag": "ModelDB:113426"
- }
- ],
- "timestamp_created": "2024-01-11 15:27:59.033859+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/113426",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "778": {
- "auto_sync": true,
- "content_types": "modeling",
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- "modeling"
- ],
- "default_context": "master",
- "id": 778,
- "name": "Computer simulations of neuron-glia interactions mediated by ion flux (Somjen et al. 2008)",
- "repository_type": "github",
- "summary": "\"...\r\nTo examine the effect of glial K+ uptake, we used a model neuron equipped with Na+, K+, Ca2+ and Cl−\r\nconductances, ion pumps and ion exchangers, surrounded by interstitial space and glia. \r\nThe glial membrane was either \u201cpassive\u201d, incorporating only leak channels and an ion\r\nexchange pump, or it had rectifying K+ channels. We computed ion fluxes, concentration changes and osmotic\r\nvolume changes.\r\n...\r\nWe conclude that voltage gated K+ currents can boost the effectiveness of the glial \u201cpotassium buffer\u201d\r\nand that this buffer function is important even at moderate or low levels of excitation, but especially so in pathological states.\"",
- "tags": [
- {
- "id": 572,
- "tag": "Calcium dynamics"
- },
- {
- "id": 469,
- "tag": "Epilepsy"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 739,
- "tag": "I Na,p"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 575,
- "tag": "I T low threshold"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 738,
- "tag": "Na/Ca exchanger"
- },
- {
- "id": 740,
- "tag": "Na/K pump"
- },
- {
- "id": 741,
- "tag": "Sodium pump"
- },
- {
- "id": 1249,
- "tag": "ModelDB:113446"
- }
- ],
- "timestamp_created": "2024-01-11 15:27:59.538252+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/113446",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "779": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 779,
- "name": "Distributed representation of perceptual categories in the auditory cortex (Kim and Bao 2008)",
- "repository_type": "github",
- "summary": "Examines the hypothesis that enlargement in cortical stimulus representation is a mechanism of categorical perception. Categorical perception is tested using discrimination and identification ability.",
- "tags": [
- {
- "id": 762,
- "tag": "Audition"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 850,
- "tag": "Perceptual Categories"
- },
- {
- "id": 1250,
- "tag": "ModelDB:113459"
- }
- ],
- "timestamp_created": "2024-01-11 15:28:00.028285+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/113459",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "780": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 780,
- "name": "Multiple mechanisms of short term plasticity at the calyx of Held (Hennig et al. 2008)",
- "repository_type": "github",
- "summary": "This is a new model of the short-term dynamics of glutamatergic synaptic transmission, which incorporates multiple mechanisms acting at differing sites and across a range of different time scales (ms to tens of seconds). In the paper, we show that this model can accurately reproduce the experimentally measured time-course of short term depression across different stimulus frequencies at the calyx of Held. The model demonstrates how multiple forms of activity-dependent modulation of release probability and vesicle pool depletion interact, and shows how stimulus-history-dependent recovery from synaptic depression can arise from dynamics on multiple time scales.",
- "tags": [
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 724,
- "tag": "Short-term Synaptic Plasticity"
- },
- {
- "id": 1251,
- "tag": "ModelDB:113649"
- }
- ],
- "timestamp_created": "2024-01-11 15:28:00.506037+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/113649",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "781": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 781,
- "name": "MEG of Somatosensory Neocortex (Jones et al. 2007)",
- "repository_type": "github",
- "summary": "\"... To make a direct and principled connection between the SI (somatosensory primary neocortex magnetoencephalography) waveform and underlying neural dynamics, we developed a biophysically realistic\r\ncomputational SI model that contained excitatory and inhibitory neurons in supragranular and infragranular layers. ... our model\r\nprovides a biophysically realistic solution to the MEG signal and can predict the electrophysiological correlates of human perception.\"\r\n",
- "tags": [
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 580,
- "tag": "I M"
- },
- {
- "id": 844,
- "tag": "I R"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 575,
- "tag": "I T low threshold"
- },
- {
- "id": 851,
- "tag": "Magnetoencephalography"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 764,
- "tag": "Touch"
- },
- {
- "id": 1252,
- "tag": "ModelDB:113732"
- }
- ],
- "timestamp_created": "2024-01-11 15:28:01.015779+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/113732",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "782": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 782,
- "name": "KInNeSS : a modular framework for computational neuroscience (Versace et al. 2008)",
- "repository_type": "github",
- "summary": "The xml files provided here implement a network of excitatory and inhibitory spiking neurons, governed by either Hodgkin-Huxley or quadratic integrate-and-fire dynamical equations. The code is used to demonstrate the capabilities of the KInNeSS software package for simulation of networks of spiking neurons. The simulation protocol used here is meant to facilitate the comparison of KInNeSS with other simulators reviewed in Brette et al. (2007). See the associated paper \"Versace et al. (2008) KInNeSS : a modular framework for computational neuroscience.\" for an extensive description of KInNeSS .",
- "tags": [
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 765,
- "tag": "I Chloride"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 852,
- "tag": "KInNeSS"
- },
- {
- "id": 756,
- "tag": "Methods"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 640,
- "tag": "NeuroML"
- },
- {
- "id": 1253,
- "tag": "ModelDB:113939"
- }
- ],
- "timestamp_created": "2024-01-11 15:28:01.534044+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/113939",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "783": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 783,
- "name": "Dendritic processing of excitatory synaptic input in GnRH neurons (Roberts et al. 2006)",
- "repository_type": "github",
- "summary": "\"... we used electrophysiological recordings and neuronal reconstructions to generate computer models of (Gonadotopin-Releasing Hormone) GnRH neurons to examine the effects of synaptic inputs at varying distances from the soma along dendrites. ... analysis of reduced morphology models indicated that this population of cells is unlikely to exhibit low-frequency tonic spiking in the absence of synaptic input. ... applying realistic patterns of synaptic input to modeled GnRH neurons indicates that synapses located more than about 30% of the average dendrite length from the soma cannot drive firing at frequencies consistent with neuropeptide release. Thus, processing of synaptic input to dendrites of GnRH neurons is probably more complex than simple summation.\"\r\n",
- "tags": [
- {
- "id": 600,
- "tag": "GENESIS"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 589,
- "tag": "I L high threshold"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 596,
- "tag": "Synaptic Integration"
- },
- {
- "id": 1254,
- "tag": "ModelDB:113949"
- }
- ],
- "timestamp_created": "2024-01-11 15:28:02.025880+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/113949",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "784": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 784,
- "name": "Hodgkin-Huxley model of persistent activity in prefrontal cortex neurons (Winograd et al. 2008)",
- "repository_type": "github",
- "summary": "The paper demonstrate a form of graded persistent activity activated by hyperpolarization. This phenomenon is modeled based on a slow calcium regulation of Ih, similar to that introduced\r\nearlier for thalamic neurons (see Destexhe et al., J Neurophysiol. 1996). The only difference is that the calcium signal is here provided by the high-threshold calcium current (instead of the low-threshold calcium current in thalamic neurons).",
- "tags": [
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 589,
- "tag": "I L high threshold"
- },
- {
- "id": 580,
- "tag": "I M"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 567,
- "tag": "Ion Channel Kinetics"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 1255,
- "tag": "ModelDB:113997"
- }
- ],
- "timestamp_created": "2024-01-11 15:28:02.545568+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/113997",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "785": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 785,
- "name": "Hippocampal basket cell gap junction network dynamics (Saraga et al. 2006)",
- "repository_type": "github",
- "summary": "2 cell network of hippocampal basket cells connected by gap junctions. Paper explores how distal gap junctions and active dendrites can tune network dynamics.",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 579,
- "tag": "Active Dendrites"
- },
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 754,
- "tag": "Delay"
- },
- {
- "id": 786,
- "tag": "Electrotonus"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 1256,
- "tag": "ModelDB:114047"
- }
- ],
- "timestamp_created": "2024-01-11 15:28:03.024817+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/114047",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "786": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 786,
- "name": "Effect of slowly inactivating IKdr to delayed firing of action potentials (Wu et al. 2008)",
- "repository_type": "github",
- "summary": "\"The properties of slowly inactivating delayed-rectifier K+ current (IKdr) were investigated in NG108-15 neuronal cells differentiated with long-term exposure to dibutyryl cyclic AMP. \r\n...\r\nThe computer model, in which state-dependent inactivation of IKdr was incorporated, was also implemented to predict the firing behavior present in NG108-15 cells. \r\n...\r\nOur theoretical work and the experimental results led us to propose a pivotal role of slowly inactivating IKdr in delayed firing of APs in NG108-15 cells. The results also suggest that aconitine modulation of IKdr gating is an important molecular mechanism through which it can contribute to neuronal firing.\"",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 754,
- "tag": "Delay"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 759,
- "tag": "XPPAUT"
- },
- {
- "id": 1257,
- "tag": "ModelDB:114108"
- }
- ],
- "timestamp_created": "2024-01-11 15:28:03.491544+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/114108",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "787": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 787,
- "name": "Systems-level modeling of neuronal circuits for leech swimming (Zheng et al. 2007)",
- "repository_type": "github",
- "summary": "\"This paper describes a mathematical model of the neuronal central pattern generator (CPG) that controls the rhythmic body motion of the swimming leech. The systems approach is employed to capture the neuronal dynamics essential for generating coordinated oscillations of cell membrane potentials by a simple CPG architecture with a minimal number of parameters. \r\n... parameter estimation leads to predictions regarding the synaptic coupling strength and intrinsic period gradient along the nerve cord, the latter of which agrees qualitatively with experimental observations.\"",
- "tags": [
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 569,
- "tag": "Simplified Models"
- },
- {
- "id": 720,
- "tag": "Temporal Pattern Generation"
- },
- {
- "id": 1258,
- "tag": "ModelDB:114230"
- }
- ],
- "timestamp_created": "2024-01-11 15:28:03.968778+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/114230",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "auto_sync": true,
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- "modeling"
- ],
- "default_context": "master",
- "id": 788,
- "name": "Brette-Gerstner model (Touboul and Brette 2008)",
- "repository_type": "github",
- "summary": "Brian code to simulate the Brette-Gerstner model and reproduce the figures of Touboul and Brette, Biol Cyber (2008).",
- "tags": [
- {
- "id": 645,
- "tag": "Brian"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 620,
- "tag": "Python"
- },
- {
- "id": 1259,
- "tag": "ModelDB:114242"
- }
- ],
- "timestamp_created": "2024-01-11 15:28:04.434417+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/114242",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
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- "auto_sync": true,
- "content_types": "modeling",
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- "modeling"
- ],
- "default_context": "master",
- "id": 789,
- "name": "A comparative computer simulation of dendritic morphology (Donohue and Ascoli 2008)",
- "repository_type": "github",
- "summary": "Morphological aspects of dendritic branching such branch lengths, taper rates,ratios of daughter radii, and bifurcation probabilities are measured from real cells. These morphometrics are then resampled to create virtual trees based on the current branch order, radius, path distance to the soma, or combination of the three.",
- "tags": [
- {
- "id": 570,
- "tag": "Influence of Dendritic Geometry"
- },
- {
- "id": 778,
- "tag": "Java"
- },
- {
- "id": 756,
- "tag": "Methods"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1260,
- "tag": "ModelDB:114310"
- }
- ],
- "timestamp_created": "2024-01-11 15:28:04.901367+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/114310",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "790": {
- "auto_sync": true,
- "content_types": "modeling",
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- "modeling"
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- "default_context": "master",
- "id": 790,
- "name": "Ionic mechanisms of bursting in CA3 pyramidal neurons (Xu and Clancy 2008)",
- "repository_type": "github",
- "summary": "\"... We present a single-compartment model of a CA3 hippocampal pyramidal neuron based on recent experimental data. We then use the model to determine the roles of primary depolarizing currents in burst generation.\r\nThe single compartment\r\nmodel incorporates accurate representations of sodium (Na+) channels (NaV1.1) and T-type calcium (Ca2+) channel subtypes\r\n(CaV3.1, CaV3.2, and CaV3.3).\r\nOur simulations predict the importance of Na+ and T-type Ca2+ channels in hippocampal\r\npyramidal cell bursting and reveal the distinct contribution of each subtype to burst morphology.\r\nWe also performed fastslow\r\nanalysis in a reduced comparable model, which shows that our model burst is generated as a result of the interaction\r\nof two slow variables, the T-type Ca2+ channel activation gate and the Ca2+-dependent potassium (K+) channel activation\r\ngate.\r\nThe model reproduces a range of experimentally observed phenomena including afterdepolarizing potentials, spike widening at the end of the burst, and rebound.\r\nFinally, we use the model to simulate the effects of two epilepsy-linked\r\nmutations: R1648H in NaV1.1 and C456S in CaV3.2, both of which result in increased cellular excitability.\"\r\n",
- "tags": [
- {
- "id": 566,
- "tag": "Bursting"
- },
- {
- "id": 755,
- "tag": "C or Cplusplus program"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 589,
- "tag": "I L high threshold"
- },
- {
- "id": 580,
- "tag": "I M"
- },
- {
- "id": 721,
- "tag": "I N"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 575,
- "tag": "I T low threshold"
- },
- {
- "id": 567,
- "tag": "Ion Channel Kinetics"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1261,
- "tag": "ModelDB:114337"
- }
- ],
- "timestamp_created": "2024-01-11 15:28:05.442018+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/114337",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "791": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 791,
- "name": "Activity dependent changes in dendritic spine density and spine structure (Crook et al. 2007)",
- "repository_type": "github",
- "summary": "\"... In this work, we extend previous modeling studies [27] by combining a model for activity-dependent spine density with one for\r\ncalcium-mediated spine stem restructuring.\r\n... Additional equations characterize the change in spine density along\r\nthe dendrite, the current balance equation for an individual spine\r\nhead, the change in calcium concentration in the spine head, and the\r\ndynamics of spine stem resistance.\r\n\r\nWe use computational studies to investigate the changes in spine\r\ndensity and structure for differing synaptic inputs and demonstrate\r\nthe effects of these changes on the input-output properties of the\r\ndendritic branch.\r\n... \"",
- "tags": [
- {
- "id": 572,
- "tag": "Calcium dynamics"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 596,
- "tag": "Synaptic Integration"
- },
- {
- "id": 725,
- "tag": "Synaptic Plasticity"
- },
- {
- "id": 1262,
- "tag": "ModelDB:114342"
- }
- ],
- "timestamp_created": "2024-01-11 15:28:05.968845+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/114342",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "792": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 792,
- "name": "Homeostatic synaptic plasticity (Rabinowitch and Segev 2006a,b)",
- "repository_type": "github",
- "summary": "(2006a): \"We investigated analytically and numerically the interplay between two opposing forms of synaptic plasticity: positive-feedback, long-term potentiation/depression (LTP/LTD), and negative-feedback, homeostatic synaptic plasticity (HSP). A detailed model of a CA1 pyramidal neuron, with numerous HSP-modifiable dendritic synapses, demonstrates that HSP may have an important role in selecting which spatial patterns of LTP/LTD are to last.\r\n...\r\nDespite the negative-feedback nature of HSP, under both local and global HSP, numerous synaptic \r\npotentiations/depressions can persist. These experimentally testable results imply that HSP could be significantly involved in shaping the spatial distribution of synaptic weights in the dendrites and not just normalizing it, as is currently believed.\"\r\n(2006b): \"Homeostatic synaptic plasticity (HSP) is an important mechanism attributed with the slow regulation of the neuron's activity. Whenever activity is chronically enhanced, HSP weakens the weights of the synapses in the dendrites and vice versa. Because dendritic morphology and its electrical properties partition the dendritic tree into functional compartments, we set out to explore the interplay between HSP and dendritic compartmentalization.\r\n...\r\nThe spatial distribution of synaptic weights throughout the dendrites will markedly differ under the local versus global HSP mechanisms. We suggest an experimental paradigm to unravel which type of HSP mechanism operates in the dendritic tree. The answer to this question will have important implications to our understanding of the functional organization of the neuron.\"\r\n",
- "tags": [
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 725,
- "tag": "Synaptic Plasticity"
- },
- {
- "id": 1263,
- "tag": "ModelDB:114355"
- }
- ],
- "timestamp_created": "2024-01-11 15:28:06.491354+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/114355",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "793": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 793,
- "name": "Impact of dendritic size and topology on pyramidal cell burst firing (van Elburg and van Ooyen 2010)",
- "repository_type": "github",
- "summary": "The code provided here was written to systematically investigate which of the\r\nphysical parameters controlled by dendritic morphology underlies the differences\r\nin spiking behaviour observed in different realizations of the\r\n'ping-pong'-model. Structurally varying dendritic topology and length in a\r\nsimplified model allows us to separate out the physical parameters derived from\r\nmorphology underlying burst firing.\r\nTo perform the parameter scans we created a new NEURON tool the\r\nMultipleRunControl which can be used to easily set up a parameter scan and write\r\nthe simulation results to file.\r\nUsing this code we found that not input conductance but the arrival time of the\r\nreturn current, as measured provisionally by the average electrotonic path\r\nlength, determines whether the pyramidal cell (with ping-pong model dynamics)\r\nwill burst or fire single spikes.",
- "tags": [
- {
- "id": 579,
- "tag": "Active Dendrites"
- },
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 566,
- "tag": "Bursting"
- },
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 580,
- "tag": "I M"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 570,
- "tag": "Influence of Dendritic Geometry"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 756,
- "tag": "Methods"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 569,
- "tag": "Simplified Models"
- },
- {
- "id": 587,
- "tag": "Spatio-temporal Activity Patterns"
- },
- {
- "id": 1264,
- "tag": "ModelDB:114359"
- }
- ],
- "timestamp_created": "2024-01-11 15:28:06.997973+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/114359",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "794": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 794,
- "name": "An allosteric kinetics of NMDARs in STDP (Urakubo et al. 2008)",
- "repository_type": "github",
- "summary": "\"... We developed a detailed biophysical model of STDP and found\r\nthat the model required spike timing-dependent distinct suppression of NMDARs by Ca2+-calmodulin.\r\n\r\nThis led us to predict an allosteric\r\nkinetics of NMDARs: a slow and rapid suppression of NMDARs by Ca2+-calmodulin with prespiking -> postspiking and postspiking -> prespiking, respectively.\r\n\r\nWe found that the allosteric kinetics, but not the conventional kinetics, is consistent with specific features of\r\namplitudes and peak time of NMDAR-mediated EPSPs in experiments.\r\n...\" See paper for more and details.",
- "tags": [
- {
- "id": 750,
- "tag": "GENESIS (web link to model)"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 567,
- "tag": "Ion Channel Kinetics"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 802,
- "tag": "STDP"
- },
- {
- "id": 751,
- "tag": "Signaling pathways"
- },
- {
- "id": 1265,
- "tag": "ModelDB:114365"
- }
- ],
- "timestamp_created": "2024-01-11 15:28:07.494477+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/114365",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "795": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 795,
- "name": "Na+ channel dependence of AP initiation in cortical pyramidal neuron (Kole et al. 2008)",
- "repository_type": "github",
- "summary": "In this simulation action potential initiation, action potential properties and the role of axon initial segment Na+ channels are investigated in a realistic model of a layer 5 pyramidal neuron axon initial segment. The main Na+ channel properties were constrained by experimental data and the axon initial segment was reconstructed. Model parameters were constrained by direct recordings at the axon initial segment.",
- "tags": [
- {
- "id": 727,
- "tag": "Action Potential Initiation"
- },
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 579,
- "tag": "Active Dendrites"
- },
- {
- "id": 728,
- "tag": "Axonal Action Potentials"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 580,
- "tag": "I M"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 1266,
- "tag": "ModelDB:114394"
- }
- ],
- "timestamp_created": "2024-01-11 15:28:07.986288+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/114394",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "796": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 796,
- "name": "A simplified model of NMDA oscillations in lamprey locomotor neurons (Huss et al. 2008)",
- "repository_type": "github",
- "summary": "Using experiments in conjunction with this simplified model, we sought to understand the basic mechanisms behind NMDA-induced oscillations in lamprey locomotor neurons, specifically (a) how the oscillation frequency depends on NMDA concentration and why, and (b) what the minimal number of components for generating NMDA oscillations is (in vitro and in the model).",
- "tags": [
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 569,
- "tag": "Simplified Models"
- },
- {
- "id": 759,
- "tag": "XPPAUT"
- },
- {
- "id": 1267,
- "tag": "ModelDB:114424"
- }
- ],
- "timestamp_created": "2024-01-11 15:28:08.468617+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/114424",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "797": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 797,
- "name": "Synergistic inhibitory action of oxcarbazepine on INa and IK (Huang et al. 2008)",
- "repository_type": "github",
- "summary": "\"Oxcarbazepine (OXC), one of the newer anti-epileptic drugs, has been demonstrating its efficacy on wide-spectrum neuropsychiatric disorders. \r\n... With the aid of patch-clamp technology, we first investigated the effects of OXC on ion currents in NG108-15 neuronal cells differentiated with cyclic AMP. \r\n\r\nWe found OXC ... caused a reversible reduction in the amplitude of voltage-gated Na+ current (INa) ...\r\nand produce(d) a significant prolongation in the recovery of INa inactivation. \r\n\r\n...\r\nMoreover, OXC could suppress the amplitude of delayed rectifier K+ current (IK(DR)), with no effect on M-type K+ current (IK(M)). \r\n\r\n...\r\nFurthermore, the simulations, based on hippocampal pyramidal neurons (Pinsky-Rinzel model) and a network of the Hodgkin-Huxley model, were analysed to investigate the effect of OXC on action potentials. \r\n\r\nTaken together, our results suggest that the synergistic blocking effects on INa and IK(DR) may contribute to the underlying mechanisms through which OXC affects neuronal function in vivo.\"\r\n",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 567,
- "tag": "Ion Channel Kinetics"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 569,
- "tag": "Simplified Models"
- },
- {
- "id": 759,
- "tag": "XPPAUT"
- },
- {
- "id": 1268,
- "tag": "ModelDB:114450"
- }
- ],
- "timestamp_created": "2024-01-11 15:28:08.954409+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/114450",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "798": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 798,
- "name": "Efffect of propofol on potassium current in cardiac H9c2 cells (Liu et al. 2008)",
- "repository_type": "github",
- "summary": "\"...\r\nThe effects \r\nof propofol, an intravenous anesthetic agent with a distinct chemical structure, \r\non ion currents of differentiated clonal cardiac (H9c2) cells were investigated \r\nin this study. \r\n\r\nPropofol ... suppressed the amplitude of delayed \r\nrectifier K(+) current (I(K(DR))) in a concentration-dependent manner with \r\nan IC(50) value of 36 muM. \r\n...\r\nPropofol (30 muM) had no effect on erg-mediated K(+) \r\ncurrent in these cells; however, it suppressed L-type Ca(2+) current (I(Ca,L)) \r\nof cardiac and skeletal types to a similar extent. \r\n...\r\nNumerical \r\nsimulations of I(K(DR)) based on a Markovian model reproduce the \r\nexperimental results and show that propofol-induced blockade of I(K(DR)) \r\nis associated with an decrease in forward rate of the activation process and \r\nan increase in transitional rate into the inactivated state. \r\n\r\n...\"",
- "tags": [
- {
- "id": 737,
- "tag": "Heart disease"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 783,
- "tag": "I_Ks"
- },
- {
- "id": 567,
- "tag": "Ion Channel Kinetics"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 759,
- "tag": "XPPAUT"
- },
- {
- "id": 1269,
- "tag": "ModelDB:114451"
- }
- ],
- "timestamp_created": "2024-01-11 15:28:09.540493+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/114451",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "799": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 799,
- "name": "CaMKII system exhibiting bistability with respect to calcium (Graupner and Brunel 2007)",
- "repository_type": "github",
- "summary": "\"... We present a detailed biochemical model of the CaMKII autophosphorylation and the protein signaling cascade governing the CaMKII dephosphorylation.\r\n... it is shown that the CaMKII system can qualitatively reproduce results of plasticity outcomes in response to spike-timing dependent plasticity (STDP) and presynaptic stimulation protocols.\r\nThis shows that the CaMKII protein network can account for both induction, through LTP/LTD-like transitions, and storage, due to its bistability, of synaptic changes.\"",
- "tags": [
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 749,
- "tag": "Long-term Synaptic Plasticity"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 751,
- "tag": "Signaling pathways"
- },
- {
- "id": 725,
- "tag": "Synaptic Plasticity"
- },
- {
- "id": 759,
- "tag": "XPPAUT"
- },
- {
- "id": 1270,
- "tag": "ModelDB:114452"
- }
- ],
- "timestamp_created": "2024-01-11 15:28:10.043527+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/114452",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "800": {
- "auto_sync": true,
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- "modeling"
- ],
- "default_context": "master",
- "id": 800,
- "name": "Contrast invariance by LGN synaptic depression (Banitt et al. 2007)",
- "repository_type": "github",
- "summary": "\"Simple cells in layer 4 of the primary visual cortex of the cat show contrast-invariant orientation tuning, in which the amplitude of the\r\npeak response is proportional to the stimulus contrast but the width of the tuning curve hardly changes with contrast. \r\n\r\nThis study uses a\r\ndetailed model of spiny stellate cells (SSCs) from cat area 17 to explain this property. \r\n\r\nThe model integrates our experimental data,\r\nincluding morphological and intrinsic membrane properties and the number and spatial distribution of four major synaptic input\r\nsources of the SSC: the dorsal lateral geniculate nucleus (dLGN) and three cortical sources. \r\n\r\n...\r\n\r\nThe model response is in close\r\nagreement with experimental results, in terms of both output spikes and membrane voltage (amplitude and fluctuations), with reasonable\r\nexceptions given that recurrent connections were not incorporated.\"",
- "tags": [
- {
- "id": 579,
- "tag": "Active Dendrites"
- },
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 564,
- "tag": "ModelDB"
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- "id": 577,
- "tag": "NEURON"
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- "tag": "Parameter Fitting"
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- "id": 719,
- "tag": "Pattern Recognition"
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- "id": 596,
- "tag": "Synaptic Integration"
- },
- {
- "id": 726,
- "tag": "Vision"
- },
- {
- "id": 1271,
- "tag": "ModelDB:114637"
- }
- ],
- "timestamp_created": "2024-01-11 15:28:10.537899+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/114637",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "801": {
- "auto_sync": true,
- "content_types": "modeling",
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- "modeling"
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- "default_context": "master",
- "id": 801,
- "name": "Globus pallidus multi-compartmental model neuron with realistic morphology (Gunay et al. 2008)",
- "repository_type": "github",
- "summary": "\"Globus pallidus (GP) neurons recorded in brain slices show significant variability in intrinsic electrophysiological properties. \r\n\r\nTo investigate how this variability arises, we manipulated the biophysical properties of GP neurons using computer simulations. \r\n\r\n\r\n...\r\nOur results indicated that most of the experimental variability could be matched by varying conductance densities, which we confirmed with additional partial block experiments. \r\n\r\nFurther analysis resulted in two key observations: (1) each voltage-gated conductance had effects on multiple measures such as action potential waveform and spontaneous or stimulated spike rates; and (2) the effect of each conductance was highly dependent on the background context of other conductances present. \r\n\r\nIn some cases, such interactions could reverse the effect of the density of one conductance on important excitability measures. \r\n...\"",
- "tags": [
- {
- "id": 579,
- "tag": "Active Dendrites"
- },
- {
- "id": 565,
- "tag": "Dendritic Action Potentials"
- },
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 600,
- "tag": "GENESIS"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 591,
- "tag": "I K,leak"
- },
- {
- "id": 589,
- "tag": "I L high threshold"
- },
- {
- "id": 739,
- "tag": "I Na,p"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 784,
- "tag": "KCNQ1"
- },
- {
- "id": 756,
- "tag": "Methods"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 568,
- "tag": "Parameter Fitting"
- },
- {
- "id": 801,
- "tag": "Parkinson's"
- },
- {
- "id": 1272,
- "tag": "ModelDB:114639"
- }
- ],
- "timestamp_created": "2024-01-11 15:28:11.099570+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/114639",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "802": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 802,
- "name": "High-Res. Recordings Using a Real-Time Computational Model of the Electrode (Brette et al. 2008)",
- "repository_type": "github",
- "summary": "\"Intracellular recordings of neuronal membrane potential are a central tool in neurophysiology.\r\n...\r\nWe introduce a computer-aided technique, Active Electrode Compensation (AEC), based on a digital model of the electrode interfaced in real time with the electrophysiological setup. \r\n...\r\nAEC should be particularly useful to characterize fast neuronal phenomena intracellularly in vivo.\"",
- "tags": [
- {
- "id": 767,
- "tag": "MATLAB (web link to model)"
- },
- {
- "id": 756,
- "tag": "Methods"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 743,
- "tag": "NEURON (web link to model)"
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- "id": 853,
- "tag": "Python (web link to model)"
- },
- {
- "id": 854,
- "tag": "Scilab (web link to model)"
- },
- {
- "id": 1273,
- "tag": "ModelDB:114643"
- }
- ],
- "timestamp_created": "2024-01-11 15:28:11.606347+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/114643",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "803": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 803,
- "name": "Axonal gap junctions produce fast oscillations in cerebellar Purkinje cells (Traub et al. 2008)",
- "repository_type": "github",
- "summary": "Examines how electrical coupling between proximal axons produces fast oscillations in cerebellar Purkinje cells.\r\nTraub RD, Middleton SJ, Knopfel T, Whittington MA (2008) Model of very fast (>75 Hz) network oscillations generated by electrical coupling between the proximal axons of cerebellar Purkinje cells. European Journal of Neuroscience.",
- "tags": [
- {
- "id": 710,
- "tag": "FORTRAN"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 580,
- "tag": "I M"
- },
- {
- "id": 739,
- "tag": "I Na,p"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 844,
- "tag": "I R"
- },
- {
- "id": 575,
- "tag": "I T low threshold"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 742,
- "tag": "I p,q"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 1274,
- "tag": "ModelDB:114654"
- }
- ],
- "timestamp_created": "2024-01-11 15:28:12.323305+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/114654",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "804": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 804,
- "name": "Laminar connectivity matrix simulation (Weiler et al 2008)",
- "repository_type": "github",
- "summary": "A routine that simulates the flow of activity within and across laminar levels in the local pyramidal neuron network, based on a connectivity matrix (W) measured by laser scanning photostimulation in mouse somatic motor cortex, and a very simple neural network simulation.",
- "tags": [
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 855,
- "tag": "Connectivity matrix"
- },
- {
- "id": 856,
- "tag": "Laminar Connectivity"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1275,
- "tag": "ModelDB:114655"
- }
- ],
- "timestamp_created": "2024-01-11 15:28:12.807780+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/114655",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "805": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 805,
- "name": "Olfactory bulb mitral and granule cell column formation (Migliore et al. 2007)",
- "repository_type": "github",
- "summary": "In the olfactory bulb, the processing units for odor discrimination are believed \r\nto involve dendrodendritic synaptic interactions between mitral and granule cells. \r\nThere is increasing anatomical evidence that these cells are organized in columns, \r\nand that the columns processing a given odor are arranged in widely distributed arrays. \r\nExperimental evidence is lacking on the underlying learning mechanisms for how these \r\ncolumns and arrays are formed. \r\nWe have used a simplified realistic circuit model to test the hypothesis that \r\ndistributed connectivity can self-organize through an activity-dependent dendrodendritic \r\nsynaptic mechanism. \r\nThe results point to action potentials propagating in the mitral cell lateral dendrites \r\nas playing a critical role in this mechanism, and suggest a novel and robust learning \r\nmechanism for the development of distributed processing units in a cortical structure.\r\n",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 579,
- "tag": "Active Dendrites"
- },
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 565,
- "tag": "Dendritic Action Potentials"
- },
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 825,
- "tag": "Learning"
- },
- {
- "id": 749,
- "tag": "Long-term Synaptic Plasticity"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 588,
- "tag": "Olfaction"
- },
- {
- "id": 725,
- "tag": "Synaptic Plasticity"
- },
- {
- "id": 1276,
- "tag": "ModelDB:114665"
- }
- ],
- "timestamp_created": "2024-01-11 15:28:13.295100+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/114665",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "806": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 806,
- "name": "GPi/GPe neuron models (Johnson and McIntyre 2008)",
- "repository_type": "github",
- "summary": "Model files for two types of non-human primate neurons used in the paper: simplified versions of 1) a GPi neuron and 2) a GPe axon collateralizing in GPi en route to STN.",
- "tags": [
- {
- "id": 728,
- "tag": "Axonal Action Potentials"
- },
- {
- "id": 734,
- "tag": "Extracellular Fields"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 801,
- "tag": "Parkinson's"
- },
- {
- "id": 569,
- "tag": "Simplified Models"
- },
- {
- "id": 1277,
- "tag": "ModelDB:114685"
- }
- ],
- "timestamp_created": "2024-01-11 15:28:13.832170+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/114685",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "807": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 807,
- "name": "High frequency oscillations induced in three gap-junction coupled neurons (Tseng et al. 2008)",
- "repository_type": "github",
- "summary": "Here we showed experimentally that high frequency oscillations (up to 600 Hz) were easily induced in a purely gap-junction coupled network by simple two stimuli with very short interval. The root cause is that the second elicited spike suffered from slow propagation speed and failure to transmit through a low-conductance junction. Similiar results were also obtained in these simulation.",
- "tags": [
- {
- "id": 727,
- "tag": "Action Potential Initiation"
- },
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 728,
- "tag": "Axonal Action Potentials"
- },
- {
- "id": 745,
- "tag": "Conduction failure"
- },
- {
- "id": 754,
- "tag": "Delay"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 1278,
- "tag": "ModelDB:114735"
- }
- ],
- "timestamp_created": "2024-01-11 15:28:14.326536+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/114735",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "808": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 808,
- "name": "Axonal NaV1.6 Sodium Channels in AP Initiation of CA1 Pyramidal Neurons (Royeck et al. 2008)",
- "repository_type": "github",
- "summary": "\"...\r\n\r\nWe show that the Na+ channel NaV1.6 displays a striking aggregation at the AIS\r\nof cortical neurons.\r\n\r\n\r\n...\r\nIn combination with simulations using a realistic\r\ncomputer model of a CA1 pyramidal cell, our results imply that a hyperpolarized\r\nvoltage-dependence of activation of AIS NaV1.6 channels is important both in\r\ndetermining spike threshold and localizing spike initiation to the AIS. \r\n\r\n...\r\nThese results suggest that NaV1.6 subunits at the AIS contribute significantly to\r\nits role as spike trigger zone and shape repetitive discharge properties of CA1 neurons.\"\r\n",
- "tags": [
- {
- "id": 727,
- "tag": "Action Potential Initiation"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 589,
- "tag": "I L high threshold"
- },
- {
- "id": 580,
- "tag": "I M"
- },
- {
- "id": 721,
- "tag": "I N"
- },
- {
- "id": 739,
- "tag": "I Na,p"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 843,
- "tag": "I Q"
- },
- {
- "id": 575,
- "tag": "I T low threshold"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 742,
- "tag": "I p,q"
- },
- {
- "id": 567,
- "tag": "Ion Channel Kinetics"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 720,
- "tag": "Temporal Pattern Generation"
- },
- {
- "id": 1279,
- "tag": "ModelDB:115356"
- }
- ],
- "timestamp_created": "2024-01-11 15:28:15.129189+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/115356",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "809": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 809,
- "name": "Generalized Carnevale-Hines algorithm (van Elburg and van Ooyen 2009)",
- "repository_type": "github",
- "summary": "Demo illustrating the behaviour of the integrate-and-fire model in the parameter regime relevant for the generalized event-based Carnevale-Hines integration scheme. The demo includes the improved implementation of the IntFire4 mechanism.\r\n",
- "tags": [
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 569,
- "tag": "Simplified Models"
- },
- {
- "id": 1280,
- "tag": "ModelDB:115357"
- }
- ],
- "timestamp_created": "2024-01-11 15:28:15.672997+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/115357",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "810": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 810,
- "name": "Human Attentional Networks: A Connectionist Model (Wang and Fan 2007)",
- "repository_type": "github",
- "summary": "\"... We describe a connectionist model of human attentional networks to explore the\r\npossible interplays among the networks from a computational\r\nperspective. This model is developed in the framework of\r\nleabra (local, error-driven, and associative, biologically realistic\r\nalgorithm) and simultaneously involves these attentional networks\r\nconnected in a biologically inspired way. ...\r\n\r\n\r\nWe evaluate the model by simulating the empirical data collected on normal human\r\nsubjects using the Attentional Network Test (ANT).\r\n\r\nThe simulation results fit the experimental data well.\r\n\r\nIn addition, we show that the same model, with a single parameter change that\r\naffects executive control, is able to simulate the empirical data collected\r\nfrom patients with schizophrenia.\r\n\r\nThis model represents a plausible connectionist explanation for the functional structure\r\nand interaction of human attentional networks.\"\r\n",
- "tags": [
- {
- "id": 771,
- "tag": "Action Selection/Decision Making"
- },
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 807,
- "tag": "Emergent/PDPplusplus"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 845,
- "tag": "Schizophrenia"
- },
- {
- "id": 822,
- "tag": "Winner-take-all"
- },
- {
- "id": 1281,
- "tag": "ModelDB:115813"
- }
- ],
- "timestamp_created": "2024-01-11 15:28:16.167138+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/115813",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "811": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 811,
- "name": "Neural modeling of an internal clock (Yamazaki and Tanaka 2008)",
- "repository_type": "github",
- "summary": "\"We studied a simple random recurrent inhibitory network. Despite its simplicity, the dynamics was so rich that activity patterns of neurons\r\nevolved with time without recurrence due to random recurrent connections\r\namong neurons. The sequence of activity patterns was generated\r\nby the trigger of an external signal, and the generation was stable against\r\nnoise.... Therefore, a\r\ntime passage from the trigger of an external signal could be represented by\r\nthe sequence of activity patterns, suggesting that this model could work\r\nas an internal clock. ...\"",
- "tags": [
- {
- "id": 755,
- "tag": "C or Cplusplus program"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 791,
- "tag": "Rate-coding model neurons"
- },
- {
- "id": 587,
- "tag": "Spatio-temporal Activity Patterns"
- },
- {
- "id": 720,
- "tag": "Temporal Pattern Generation"
- },
- {
- "id": 1282,
- "tag": "ModelDB:115966"
- }
- ],
- "timestamp_created": "2024-01-11 15:28:16.687004+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/115966",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "812": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 812,
- "name": "Polychronization: Computation With Spikes (Izhikevich 2005)",
- "repository_type": "github",
- "summary": "\"We present a minimal spiking network that can polychronize, that is,\r\nexhibit reproducible time-locked but not synchronous firing patterns\r\nwith millisecond precision, as in synfire braids. \r\n\r\nThe network consists\r\nof cortical spiking neurons with axonal conduction delays and spiketiming-\r\ndependent plasticity (STDP); a ready-to-use MATLAB code is\r\nincluded. \r\n\r\nIt exhibits sleeplike oscillations, gamma (40 Hz) rhythms,\r\nconversion of firing rates to spike timings, and other interesting regimes.\r\n\r\n...\r\nTo our surprise, the number of\r\ncoexisting polychronous groups far exceeds the number of neurons in\r\nthe network, resulting in an unprecedented memory capacity of the\r\nsystem. \r\n\r\n...\"",
- "tags": [
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 776,
- "tag": "C or Cplusplus program (web link to model)"
- },
- {
- "id": 767,
- "tag": "MATLAB (web link to model)"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 802,
- "tag": "STDP"
- },
- {
- "id": 569,
- "tag": "Simplified Models"
- },
- {
- "id": 587,
- "tag": "Spatio-temporal Activity Patterns"
- },
- {
- "id": 720,
- "tag": "Temporal Pattern Generation"
- },
- {
- "id": 1283,
- "tag": "ModelDB:115968"
- }
- ],
- "timestamp_created": "2024-01-11 15:28:17.157478+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/115968",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "813": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 813,
- "name": "Axonal Projection and Interneuron Types (Helmstaedter et al. 2008)",
- "repository_type": "github",
- "summary": "\"Interneurons in layer 2/3 (L2/3) of the somatosensory cortex show\r\n4 types of axonal projection patterns with reference to the laminae\r\nand borders of columns in rat barrel cortex (Helmstaedter et al.\r\n2008a). \r\n\r\nHere, we analyzed the dendritic geometry and electrical\r\nexcitability of these interneurons. \r\n\r\n...\r\nWe conclude that\r\n1) dendritic polarity is correlated to intrinsic electrical excitability,\r\nand 2) the axonal projection pattern represents an independent\r\nclassifier of interneurons.\r\n\"",
- "tags": [
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 589,
- "tag": "I L high threshold"
- },
- {
- "id": 580,
- "tag": "I M"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 570,
- "tag": "Influence of Dendritic Geometry"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 743,
- "tag": "NEURON (web link to model)"
- },
- {
- "id": 1284,
- "tag": "ModelDB:116053"
- }
- ],
- "timestamp_created": "2024-01-11 15:28:17.653776+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/116053",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "814": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 814,
- "name": "CA1 pyramidal neuron synaptic integration (Jarsky et al. 2005)",
- "repository_type": "github",
- "summary": "\"The perforant-path projection to the hippocampus forms synapses in the apical tuft of CA1 pyramidal neurons. \r\n\r\nWe used computer modeling to examine the function of these distal synaptic inputs, which led to three predictions that we confirmed in experiments using rat hippocampal slices. \r\n\r\n...\r\n\r\nThis 'gating' of dendritic spike propagation may be an important activation mode of CA1 pyramidal neurons, and its modulation by neurotransmitters or long-term, activity-dependent plasticity may be an important feature of dendritic integration during mnemonic processing in the hippocampus.\"\r\n",
- "tags": [
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 570,
- "tag": "Influence of Dendritic Geometry"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 743,
- "tag": "NEURON (web link to model)"
- },
- {
- "id": 596,
- "tag": "Synaptic Integration"
- },
- {
- "id": 1285,
- "tag": "ModelDB:116084"
- }
- ],
- "timestamp_created": "2024-01-11 15:28:18.127041+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/116084",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "815": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 815,
- "name": "Code to calc. spike-trig. ave (STA) conduct. from Vm (Pospischil et al. 2007, Rudolph et al. 2007)",
- "repository_type": "github",
- "summary": "PYTHON code to calculate spike-triggered average (STA) conductances from intracellular recordings, according to the method published by Pospischil et al., J Neurophysiol, 2007. The method consists of a maximum likelihood estimate of the conductance STA, from the voltage STA (which is calculated from the data). The method was tested using models and dynamic-clamp experiments; for details, see the original publication (Pospischil et al., 2007). The first application of this method to experimental data was from intracellular recordings in awake cat cerebral cortex (Rudolph et al., 2007).",
- "tags": [
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 756,
- "tag": "Methods"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 620,
- "tag": "Python"
- },
- {
- "id": 592,
- "tag": "Sleep"
- },
- {
- "id": 1286,
- "tag": "ModelDB:116086"
- }
- ],
- "timestamp_created": "2024-01-11 15:28:18.608994+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/116086",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "816": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 816,
- "name": "Lateral dendrodenditic inhibition in the Olfactory Bulb (David et al. 2008)",
- "repository_type": "github",
- "summary": "Mitral cells, the principal output neurons of the olfactory bulb, receive direct synaptic activation from primary sensory neurons. Shunting inhibitory inputs delivered by granule cell interneurons onto mitral cell lateral dendrites are believed to influence spike timing and underlie coordinated field potential oscillations. Lateral dendritic shunt conductances delayed spiking to a degree dependent on both their electrotonic distance and phase of onset. Recurrent inhibition significantly narrowed the distribution of mitral cell spike times, illustrating a tendency towards coordinated synchronous activity. This result suggests an essential role for early mechanisms of temporal coordination in olfaction. The model was adapted from Davison et al, 2003, but include additional noise mechanisms, long lateral dendrite, and specific synaptic point processes.",
- "tags": [
- {
- "id": 579,
- "tag": "Active Dendrites"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 589,
- "tag": "I L high threshold"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 588,
- "tag": "Olfaction"
- },
- {
- "id": 569,
- "tag": "Simplified Models"
- },
- {
- "id": 586,
- "tag": "Synchronization"
- },
- {
- "id": 720,
- "tag": "Temporal Pattern Generation"
- },
- {
- "id": 1287,
- "tag": "ModelDB:116094"
- }
- ],
- "timestamp_created": "2024-01-11 15:28:19.098859+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/116094",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "817": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 817,
- "name": "Biophysical and phenomenological models of spike-timing dependent plasticity (Badoual et al. 2006)",
- "repository_type": "github",
- "summary": "\"Spike-timing dependent plasticity (STDP) is a form of associative synaptic modification which depends\r\non the respective timing of pre- and post-synaptic spikes. \r\n\r\nThe biophysical mechanisms underlying this\r\nform of plasticity are currently not known. \r\n\r\nWe present here a biophysical model which captures the\r\ncharacteristics of STDP, such as its frequency dependency, and the effects of spike pair or spike triplet\r\ninteractions. \r\n...\r\nA simplified phenomenological\r\nmodel is also derived...\"",
- "tags": [
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 580,
- "tag": "I M"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 749,
- "tag": "Long-term Synaptic Plasticity"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 802,
- "tag": "STDP"
- },
- {
- "id": 569,
- "tag": "Simplified Models"
- },
- {
- "id": 725,
- "tag": "Synaptic Plasticity"
- },
- {
- "id": 1288,
- "tag": "ModelDB:116096"
- }
- ],
- "timestamp_created": "2024-01-11 15:28:19.654327+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/116096",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "818": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 818,
- "name": "Dynamics of Spike Initiation (Prescott et al. 2008)",
- "repository_type": "github",
- "summary": "\"Transduction of graded synaptic input into trains of all-or-none action potentials (spikes) is a crucial step in neural coding.\r\n\r\nHodgkin identified three classes of neurons with qualitatively different analog-to-digital transduction properties. \r\n\r\nDespite widespread use of this classification scheme, a generalizable explanation of its biophysical basis has not been described. \r\n\r\nWe recorded from spinal sensory neurons representing each class and reproduced their transduction properties in a minimal\r\nmodel. With phase plane and bifurcation analysis, each class of excitability was shown to derive from distinct spike initiating dynamics. \r\n\r\nExcitability could be converted between all three classes by varying single parameters; moreover, several\r\nparameters, when varied one at a time, had functionally equivalent effects on excitability. From this, we conclude that the\r\nspike-initiating dynamics associated with each of Hodgkin\u2019s classes represent different outcomes in a nonlinear competition\r\nbetween oppositely directed, kinetically mismatched currents. ...\"",
- "tags": [
- {
- "id": 727,
- "tag": "Action Potential Initiation"
- },
- {
- "id": 804,
- "tag": "Bifurcation"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 821,
- "tag": "Sensory coding"
- },
- {
- "id": 569,
- "tag": "Simplified Models"
- },
- {
- "id": 759,
- "tag": "XPPAUT"
- },
- {
- "id": 1289,
- "tag": "ModelDB:116123"
- }
- ],
- "timestamp_created": "2024-01-11 15:28:20.176706+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/116123",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "819": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 819,
- "name": "Multimodal stimuli learning in hawkmoths (Balkenius et al. 2008)",
- "repository_type": "github",
- "summary": "The moth Macroglossum stellatarum can learn the color and sometimes the odor of a rewarding food\r\nsource.\r\n\r\nWe present data from 20 different experiments with different combinations of blue and yellow\r\nartificial flowers and the two odors, honeysuckle and lavender. \r\n\r\n... \r\nThree computational models were tested in the same experimental situations as the real\r\nmoths and their predictions were compared with the experimental data. \r\n\r\n...\r\nNeither the\r\nRescorla\u2013Wagner model nor a learning model with independent learning for each stimulus component\r\nwere able to explain the experimental data. \r\n\r\nWe present the new hawkmoth learning model, which\r\nassumes that the moth learns a template for the sensory attributes of the rewarding stimulus. \r\n\r\nThis\r\nmodel produces behavior that closely matches that of the real moth in all 20 experiments.",
- "tags": [
- {
- "id": 771,
- "tag": "Action Selection/Decision Making"
- },
- {
- "id": 776,
- "tag": "C or Cplusplus program (web link to model)"
- },
- {
- "id": 825,
- "tag": "Learning"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 569,
- "tag": "Simplified Models"
- },
- {
- "id": 1290,
- "tag": "ModelDB:116312"
- }
- ],
- "timestamp_created": "2024-01-11 15:28:20.799440+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/116312",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "820": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 820,
- "name": "A Model of Selection between Stimulus and Place Strategy in a Hawkmoth (Balkenius et al. 2004)",
- "repository_type": "github",
- "summary": "\"In behavioral experiments, the hawkmoth Deilephila elpenor can learn both the \r\ncolor and the position of artificial flowers.\r\n\r\n...\r\n\r\nWe show how a computational model can reproduce the behavior in the experimental situation.\r\n\r\nThe aim of the model is to investigate which learning and behavior selection strategies are \r\nnecessary to reproduce the behavior observed in the experiment.\r\n\r\nThe model is based on behavioral data and the sensitivities of the moth photoreceptors. \r\n\r\nThe model consists of a number of interacting behavior systems that are triggered by \r\nspecific stimuli and control specific behaviors. \r\n\r\nThe ability of the moth to learn the colors of different flowers and the adaptive processes involved \r\nin the choice between stimulus-approach and place-approach strategies are reproduced very accurately by the model. \r\nThe model has implications both for further studies of the ecology of the animal and for robotic systems.\"\r\n",
- "tags": [
- {
- "id": 776,
- "tag": "C or Cplusplus program (web link to model)"
- },
- {
- "id": 825,
- "tag": "Learning"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1291,
- "tag": "ModelDB:116313"
- }
- ],
- "timestamp_created": "2024-01-11 15:28:21.285020+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/116313",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "821": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 821,
- "name": "Pyramidal neurons switch from integrators to resonators (Prescott et al. 2008)",
- "repository_type": "github",
- "summary": "During wakefulness, pyramidal neurons in the intact brain are bombarded by synaptic\r\ninput that causes tonic depolarization, increased membrane conductance (i.e. shunting), and\r\nnoisy fluctuations in membrane potential; by comparison, pyramidal neurons in acute slices\r\ntypically experience little background input.\r\n\r\nSuch differences in operating conditions can compromise extrapolation of in vitro data to explain \r\nneuronal operation in vivo.\r\n\r\n...\r\n\r\n in slice experiments, we show that\r\nCA1 hippocampal pyramidal cells switch from integrators to resonators, i.e. from class 1 to class\r\n2 excitability.\r\n\r\nThe switch is explained by increased outward current contributed by the M-type\r\npotassium current IM\r\n...\r\nThus, even so-called \u201cintrinsic\u201d properties may differ qualitatively between in vitro and in vivo conditions.",
- "tags": [
- {
- "id": 804,
- "tag": "Bifurcation"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 580,
- "tag": "I M"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 569,
- "tag": "Simplified Models"
- },
- {
- "id": 596,
- "tag": "Synaptic Integration"
- },
- {
- "id": 759,
- "tag": "XPPAUT"
- },
- {
- "id": 1292,
- "tag": "ModelDB:116386"
- }
- ],
- "timestamp_created": "2024-01-11 15:28:21.746285+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/116386",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "822": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 822,
- "name": "NEURON + Python (Hines et al. 2009)",
- "repository_type": "github",
- "summary": "The NEURON simulation program now allows Python to be used alone or in\r\ncombination with NEURON's traditional Hoc interpreter. Adding Python to\r\nNEURON has the immediate benefit of making available a very extensive\r\nsuite of analysis tools written for engineering and science. It also\r\ncatalyzes NEURON software development by offering users a modern programming\r\ntool that is recognized for its flexibility and power to create and \r\nmaintain complex programs. At the same time, nothing is lost because\r\nall existing models written in Hoc, including GUI tools, continue to\r\nwork without change and are also available within the Python context.\r\nAn example of the benefits of Python availability is the use of the xml\r\nmodule in implementing NEURON's Import3D and CellBuild tools to read MorphML and\r\nNeuroML model specifications.",
- "tags": [
- {
- "id": 756,
- "tag": "Methods"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 640,
- "tag": "NeuroML"
- },
- {
- "id": 620,
- "tag": "Python"
- },
- {
- "id": 1293,
- "tag": "ModelDB:116491"
- }
- ],
- "timestamp_created": "2024-01-11 15:28:22.225588+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/116491",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "823": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 823,
- "name": "Modulation of septo-hippocampal theta activity by GABAA receptors (Hajos et al. 2004)",
- "repository_type": "github",
- "summary": "Theta frequency oscillation of the septo-hippocampal system has been considered as a prominent activity associated with cognitive function and affective processes.\r\n\r\n...\r\n\r\nIn the present experiments we applied a combination of computational and physiological techniques to explore the functional role of GABAA receptors in theta oscillation.\r\n\r\n...\r\n\r\nIn parallel to these experimental observations, a computational model has been constructed by implementing a septal GABA neuron model with a CA1 hippocampal model containing three types of neurons (including oriens and basket interneurons and pyramidal cells; latter modeled by multicompartmental techniques; for detailed model description with network parameters see online addendum: http://geza.kzoo.edu/theta).\r\n\r\nThis connectivity made the network capable of simulating the responses of the septo-hippocampal circuitry to the modulation of GABAA transmission, and the presently described computational model proved suitable to reveal several aspects of pharmacological modulation of GABAA receptors.\r\n\r\n In addition, computational findings indicated different roles of distinctively located GABAA receptors in theta generation.",
- "tags": [
- {
- "id": 600,
- "tag": "GENESIS"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 580,
- "tag": "I M"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 1294,
- "tag": "ModelDB:116567"
- }
- ],
- "timestamp_created": "2024-01-11 15:28:22.727869+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/116567",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "824": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 824,
- "name": "A Model of Multiple Spike Initiation Zones in the Leech C-interneuron (Crisp 2009)",
- "repository_type": "github",
- "summary": "The leech C-interneuron and its electrical synapse with the S-interneuron exhibit unusual properties: an asymmetric delay when impulses travel from one soma to the other, and graded C-interneuron impulse amplitudes under elevated divalent cation concentrations. These properties have been simulated using a SNNAP model in which the C-interneuron has multiple, independent spike initiation zones associated with individual electrical junctions with the C-interneuron.",
- "tags": [
- {
- "id": 727,
- "tag": "Action Potential Initiation"
- },
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 591,
- "tag": "I K,leak"
- },
- {
- "id": 739,
- "tag": "I Na,p"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 757,
- "tag": "SNNAP"
- },
- {
- "id": 1295,
- "tag": "ModelDB:116575"
- }
- ],
- "timestamp_created": "2024-01-11 15:28:23.231977+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/116575",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "825": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 825,
- "name": "Currents contributing to decision making in neurons B31-B32 of Aplysia (Hurwitz et al. 2008)",
- "repository_type": "github",
- "summary": "\"Biophysical properties of neurons contributing to the ability of an animal to decide whether or not to respond were examined. \r\n\r\nB31/B32, two pairs of bilaterally symmetrical Aplysia neurons, are major participants in deciding to initiate a buccal motor program, the neural correlate of a consummatory feeding response. \r\n\r\nB31/B32 respond to an adequate stimulus after a delay, during which time additional stimuli influence the decision to respond. \r\n\r\nB31/B32 then respond with a ramp depolarization followed by a sustained soma depolarization and axon spiking that is the expression of a commitment to respond to food. \r\n\r\nFour currents contributing to decision making in B31/B32 were characterized, and their functional effects were determined, in current- and voltage-clamp experiments and with simulations. ...\r\n\r\nHodgkin-Huxley kinetic analyses were performed on the outward currents. \r\n\r\nSimulations using equations from these analyses showed that IK-V and IK-A slow the ramp depolarization preceding the sustained depolarization. \r\n\r\nThe three outward currents contribute to braking the B31/B32 depolarization and keeping the sustained depolarization at a constant voltage. \r\n\r\nThe currents identified are sufficient to explain the properties of B31/B32 that play a role in generating the decision to feed.\"",
- "tags": [
- {
- "id": 771,
- "tag": "Action Selection/Decision Making"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 757,
- "tag": "SNNAP"
- },
- {
- "id": 1296,
- "tag": "ModelDB:116606"
- }
- ],
- "timestamp_created": "2024-01-11 15:28:23.766016+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/116606",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "826": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 826,
- "name": "Dentate gyrus granule cell: calcium and calcium-dependent conductances (Aradi and Holmes 1999)",
- "repository_type": "github",
- "summary": "We have constructed a detailed model of a hippocampal dentate granule (DG) cell that includes nine different channel types. \r\nChannel densities and distributions were chosen to reproduce reported physiological responses observed in normal solution and when blockers were applied. \r\n\r\nThe model was used to explore the contribution of each channel type to spiking behavior with particular emphasis on the mechanisms underlying postspike events. \r\n\r\n...\r\nThe model was used to predict changes in channel densities that could lead to epileptogenic burst discharges and to predict the effect of altered buffering capacity on firing behavior. \r\n\r\nWe conclude that the clustered spatial distributions of calcium related channels, the presence of slow delayed rectifier potassium currents in dendrites, and calcium buffering properties, together, might explain the resistance of DG cells to the development of epileptogenic burst discharges.",
- "tags": [
- {
- "id": 566,
- "tag": "Bursting"
- },
- {
- "id": 572,
- "tag": "Calcium dynamics"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 589,
- "tag": "I L high threshold"
- },
- {
- "id": 721,
- "tag": "I N"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 575,
- "tag": "I T low threshold"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 1297,
- "tag": "ModelDB:116740"
- }
- ],
- "timestamp_created": "2024-01-11 15:28:24.253034+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/116740",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "827": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 827,
- "name": "Spine neck plasticity controls postsynaptic calcium signals (Grunditz et al. 2008)",
- "repository_type": "github",
- "summary": "This model was set up to dissect the relative contribution of different channels to \r\nthe spine calcium transients measured at single spines.\r\n",
- "tags": [
- {
- "id": 572,
- "tag": "Calcium dynamics"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 844,
- "tag": "I R"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 1298,
- "tag": "ModelDB:116769"
- }
- ],
- "timestamp_created": "2024-01-11 15:28:24.738523+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/116769",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "828": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 828,
- "name": "Robust Reservoir Generation by Correlation-Based Learning (Yamazaki & Tanaka 2008)",
- "repository_type": "github",
- "summary": "\"Reservoir computing (RC) is a new framework for neural computation. \r\nA reservoir is usually a recurrent neural network with fixed random connections. \r\n\r\nIn this article, we propose an RC model in which the connections in the reservoir are modifiable. \r\n\r\n...\r\nWe apply our RC model to trace eyeblink conditioning. \r\n\r\nThe reservoir bridged the gap of an interstimulus interval between the conditioned and unconditioned stimuli, and a readout neuron was able to learn and express the timed conditioned response.\"\r\n",
- "tags": [
- {
- "id": 755,
- "tag": "C or Cplusplus program"
- },
- {
- "id": 825,
- "tag": "Learning"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 791,
- "tag": "Rate-coding model neurons"
- },
- {
- "id": 587,
- "tag": "Spatio-temporal Activity Patterns"
- },
- {
- "id": 720,
- "tag": "Temporal Pattern Generation"
- },
- {
- "id": 1299,
- "tag": "ModelDB:116806"
- }
- ],
- "timestamp_created": "2024-01-11 15:28:25.209775+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/116806",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "829": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 829,
- "name": "Broadening of activity with flow across neural structures (Lytton et al. 2008)",
- "repository_type": "github",
- "summary": "\"Synfire chains have long been suggested as a substrate for perception and information processing in the nervous system. \r\n\r\nHowever, embedding activation chains in a densely connected nervous matrix risks spread of signal that will obscure or obliterate the message. \r\n\r\nWe used computer modeling and physiological measurements in rat hippocampus to assess this problem of activity broadening.\r\n\r\nWe simulated a series of neural modules with feedforward propagation and random connectivity within each module and from one module to the next. ...\"",
- "tags": [
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 587,
- "tag": "Spatio-temporal Activity Patterns"
- },
- {
- "id": 720,
- "tag": "Temporal Pattern Generation"
- },
- {
- "id": 1300,
- "tag": "ModelDB:116830"
- }
- ],
- "timestamp_created": "2024-01-11 15:28:25.688329+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/116830",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "830": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 830,
- "name": "Multicompartmental cerebellar granule cell model (Diwakar et al. 2009)",
- "repository_type": "github",
- "summary": "A detailed multicompartmental model was used to study neuronal electroresponsiveness of cerebellar granule cells in rats. Here we show that, in cerebellar granule cells, Na+ channels are enriched in the axon, especially in the hillock, but almost absent from soma and dendrites. Numerical simulations indicated that granule cells have a compact electrotonic structure allowing EPSPs to diffuse with little attenuation from dendrites to axon. The spike arose almost simultaneously along the whole axonal ascending branch and invaded the hillock, whose activation promoted spike back-propagation with marginal delay (<200 micros) and attenuation (<20 mV) into the somato-dendritic compartment. For details check the cited article.",
- "tags": [
- {
- "id": 727,
- "tag": "Action Potential Initiation"
- },
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 579,
- "tag": "Active Dendrites"
- },
- {
- "id": 728,
- "tag": "Axonal Action Potentials"
- },
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 730,
- "tag": "I A, slow"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 580,
- "tag": "I M"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 763,
- "tag": "Intrinsic plasticity"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 1301,
- "tag": "ModelDB:116835"
- }
- ],
- "timestamp_created": "2024-01-11 15:28:26.165940+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/116835",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "831": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 831,
- "name": "Reward modulated STDP (Legenstein et al. 2008)",
- "repository_type": "github",
- "summary": "\"...\r\nThis article provides tools for an analytic treatment of reward-modulated\r\nSTDP, which allows us to predict under which conditions reward-modulated STDP will achieve a desired learning\r\neffect.\r\n\r\nThese analytical results imply that neurons can learn through reward-modulated STDP to classify not only spatial but\r\nalso temporal firing patterns of presynaptic neurons. \r\n\r\nThey also can learn to respond to specific presynaptic firing patterns\r\nwith particular spike patterns. \r\n\r\nFinally, the resulting learning theory predicts that even difficult credit-assignment problems,\r\nwhere it is very hard to tell which synaptic weights should be modified in order to increase the global reward for the system,\r\ncan be solved in a self-organizing manner through reward-modulated STDP. \r\n\r\nThis yields an explanation for a fundamental\r\nexperimental result on biofeedback in monkeys by Fetz and Baker. \r\n\r\nIn this experiment monkeys were rewarded for\r\nincreasing the firing rate of a particular neuron in the cortex and were able to solve this extremely difficult credit assignment\r\nproblem. \r\n...\r\nIn addition our model\r\ndemonstrates that reward-modulated STDP can be applied to all synapses in a large recurrent neural network without\r\nendangering the stability of the network dynamics.\"",
- "tags": [
- {
- "id": 857,
- "tag": "Biofeedback"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 858,
- "tag": "PCSIM"
- },
- {
- "id": 719,
- "tag": "Pattern Recognition"
- },
- {
- "id": 620,
- "tag": "Python"
- },
- {
- "id": 809,
- "tag": "Reinforcement Learning"
- },
- {
- "id": 859,
- "tag": "Reward-modulated STDP"
- },
- {
- "id": 802,
- "tag": "STDP"
- },
- {
- "id": 587,
- "tag": "Spatio-temporal Activity Patterns"
- },
- {
- "id": 1302,
- "tag": "ModelDB:116837"
- }
- ],
- "timestamp_created": "2024-01-11 15:28:26.643847+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/116837",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "832": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 832,
- "name": "The virtual slice setup (Lytton et al. 2008)",
- "repository_type": "github",
- "summary": "\"In an effort to design a simulation environment that is more similar to that of neurophysiology, we introduce a virtual slice setup in the NEURON simulator. \r\n\r\nThe virtual slice setup runs continuously and permits parameter changes, including changes to synaptic weights and time course and to intrinsic cell properties. \r\n\r\nThe virtual slice setup permits shocks to be applied at chosen locations and activity to be sampled intra- or extracellularly from chosen locations. ...\"",
- "tags": [
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 1303,
- "tag": "ModelDB:116838"
- }
- ],
- "timestamp_created": "2024-01-11 15:28:27.124524+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/116838",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "833": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 833,
- "name": "Thalamic interneuron multicompartment model (Zhu et al. 1999)",
- "repository_type": "github",
- "summary": "This is an attempt to recreate a set of simulations originally performed in 1994 under NEURON version 3 and last tested in 1999. When I ran it now it did not behave exactly the same as previously which I suspect is due to some minor mod file changes on my side rather than due to any differences among versions. \r\n\r\nAfter playing around with the parameters a little bit I was able to get something that looks generally like a physiological trace in \r\nJ Neurophysiol, 81:702--711, 1999, fig. 8b top trace. \r\n\r\nThis sad preface is simply offered in order to encourage anyone who is interested in this model to make and post fixes. I'm happy to help out.\r\n\r\nSimulation by JJ Zhu\r\n\r\nTo run\r\nnrnivmodl\r\nnrngui.hoc\r\n\r\n",
- "tags": [
- {
- "id": 566,
- "tag": "Bursting"
- },
- {
- "id": 731,
- "tag": "I CAN"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 591,
- "tag": "I K,leak"
- },
- {
- "id": 589,
- "tag": "I L high threshold"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 575,
- "tag": "I T low threshold"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 1304,
- "tag": "ModelDB:116862"
- }
- ],
- "timestamp_created": "2024-01-11 15:28:27.621324+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/116862",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "834": {
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- "modeling"
- ],
- "default_context": "master",
- "id": 834,
- "name": "High frequency stimulation of the Subthalamic Nucleus (Rubin and Terman 2004)",
- "repository_type": "github",
- "summary": "\" ... Using a computational model, this paper considers the hypothesis that DBS works by replacing pathologically rhythmic\r\nbasal ganglia output with tonic, high frequency firing.\r\n\r\nIn our simulations of parkinsonian conditions, rhythmic inhibition from GPi to the thalamus compromises the ability of thalamocortical relay (TC) cells to respond to depolarizing inputs, such as sensorimotor signals.\r\n\r\nHigh frequency stimulation of STN regularizes GPi firing, and this restores TC responsiveness, despite the increased frequency and amplitude of GPi inhibition to thalamus that result.\r\n\r\nWe provide a mathematical phase plane analysis of the mechanisms that determine TC relay capabilities in\r\nnormal, parkinsonian, and DBS states in a reduced model.\r\n\r\nThis analysis highlights the differences in deinactivation of the low-threshold calcium T -current that we observe in TC cells in these different conditions. ...\"\r\n",
- "tags": [
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 831,
- "tag": "Deep brain stimulation"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 575,
- "tag": "I T low threshold"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 801,
- "tag": "Parkinson's"
- },
- {
- "id": 759,
- "tag": "XPPAUT"
- },
- {
- "id": 1305,
- "tag": "ModelDB:116867"
- }
- ],
- "timestamp_created": "2024-01-11 15:28:28.176213+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/116867",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "835": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 835,
- "name": "Python demo of the VmT method to extract conductances from single Vm traces (Pospischil et al. 2009)",
- "repository_type": "github",
- "summary": "This python code implements a method to estimate synaptic conductances from single membrane potential traces (the \"VmT method\"), as described in Pospischil et al. (2009). The method uses a maximum likelihood procedure and was successfully tested using models and dynamic-clamp experiments in vitro (see paper for details).",
- "tags": [
- {
- "id": 756,
- "tag": "Methods"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 620,
- "tag": "Python"
- },
- {
- "id": 1306,
- "tag": "ModelDB:116870"
- }
- ],
- "timestamp_created": "2024-01-11 15:28:28.687380+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/116870",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "836": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 836,
- "name": "A spiking model of cortical broadcast and competition (Shanahan 2008)",
- "repository_type": "github",
- "summary": "\"This paper presents a computer model of cortical broadcast and competition based on spiking neurons and inspired by\r\nthe hypothesis of a global neuronal workspace underlying conscious information processing in the human brain. In the\r\nmodel, the hypothesised workspace is realised by a collection of recurrently interconnected regions capable of sustaining\r\nand disseminating a reverberating spatial pattern of activation. ...\"",
- "tags": [
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 569,
- "tag": "Simplified Models"
- },
- {
- "id": 587,
- "tag": "Spatio-temporal Activity Patterns"
- },
- {
- "id": 720,
- "tag": "Temporal Pattern Generation"
- },
- {
- "id": 794,
- "tag": "Working memory"
- },
- {
- "id": 1307,
- "tag": "ModelDB:116871"
- }
- ],
- "timestamp_created": "2024-01-11 15:28:29.170693+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/116871",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "837": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 837,
- "name": "Synaptic plasticity can produce and enhance direction selectivity (Carver et al, 2008)",
- "repository_type": "github",
- "summary": "\" ... We propose a parsimonious model of motion processing that generates direction selective responses using short-term synaptic depression and can reproduce salient features of direction selectivity found in a population of neurons in the midbrain of the weakly electric fish Eigenmannia virescens. \r\n\r\nThe model achieves direction selectivity with an elementary Reichardt motion detector: information from spatially separated receptive fields converges onto a neuron via dynamically different pathways. \r\n\r\nIn the model, these differences arise from convergence of information through distinct synapses that either exhibit or do not exhibit short-term synaptic depression\u2014short-term depression produces phase-advances relative to nondepressing synapses. ...\"\r\n",
- "tags": [
- {
- "id": 722,
- "tag": "Depression"
- },
- {
- "id": 860,
- "tag": "Direction Selectivity"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 768,
- "tag": "Synaptic Convergence"
- },
- {
- "id": 1308,
- "tag": "ModelDB:116901"
- }
- ],
- "timestamp_created": "2024-01-11 15:28:29.711826+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/116901",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "838": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 838,
- "name": "Spike frequency adaptation in the LGMD (Peron and Gabbiani 2009)",
- "repository_type": "github",
- "summary": "This model is used in the referenced paper to demonstrate that a model of an SK-like calcium-sensitive potassium (KCa) conductance can replicate the spike frequency adaptation (SFA) of the locust lobula giant movement detector (LGMD) neuron. The model simulates current injection experiments with and without KCa block in the LGMD, as well as visual stimulation experiments with and without KCa block.",
- "tags": [
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 842,
- "tag": "I Krp"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 777,
- "tag": "Spike Frequency Adaptation"
- },
- {
- "id": 726,
- "tag": "Vision"
- },
- {
- "id": 1309,
- "tag": "ModelDB:116945"
- }
- ],
- "timestamp_created": "2024-01-11 15:28:30.184499+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/116945",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "839": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 839,
- "name": "Fly lobular plate VS cell (Borst and Haag 1996, et al. 1997, et al. 1999)",
- "repository_type": "github",
- "summary": "In a series of papers the authors conducted experiments to develop understanding and models of fly visual system HS, CS, and VS neurons. This model recreates the VS neurons from those papers with enough success to merit approval by Borst although some discrepancies remain (see readme).",
- "tags": [
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 861,
- "tag": "I_K,Na"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 862,
- "tag": "Reliability"
- },
- {
- "id": 726,
- "tag": "Vision"
- },
- {
- "id": 1310,
- "tag": "ModelDB:116956"
- }
- ],
- "timestamp_created": "2024-01-11 15:28:30.832683+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/116956",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "840": {
- "auto_sync": true,
- "content_types": "modeling",
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- "modeling"
- ],
- "default_context": "master",
- "id": 840,
- "name": "Data-driven, HH-type model of the lateral pyloric (LP) cell in the STG (Nowotny et al. 2008)",
- "repository_type": "github",
- "summary": "This model was developed using voltage clamp data and existing LP models to assemble an initial set of currents which were then adjusted by extensive fitting to a long data set of an isolated LP neuron. The main points of the work are\r\na) automatic fitting is difficult but works when the method is carefully adjusted to the problem (and the initial guess is good enough).\r\nb) The resulting model (in this case) made reasonable predictions for manipulations not included in the original data set, e.g., blocking some of the ionic currents.\r\nc) The model is reasonably robust against changes in parameters but the different parameters vary a lot in this respect.\r\nd) The model is suitable for use in a network and has been used for this purpose (Ivanchenko et al. 2008)",
- "tags": [
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 566,
- "tag": "Bursting"
- },
- {
- "id": 755,
- "tag": "C or Cplusplus program"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 580,
- "tag": "I M"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 729,
- "tag": "Invertebrate"
- },
- {
- "id": 756,
- "tag": "Methods"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 568,
- "tag": "Parameter Fitting"
- },
- {
- "id": 863,
- "tag": "Parameter sensitivity"
- },
- {
- "id": 1311,
- "tag": "ModelDB:116957"
- }
- ],
- "timestamp_created": "2024-01-11 15:28:31.336380+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/116957",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "841": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 841,
- "name": "Effects of synaptic location and timing on synaptic integration (Rall 1964)",
- "repository_type": "github",
- "summary": "Reproduces figures 5 - 8 from \r\nRall, W.\r\nTheoretical significance of dendritic trees for neuronal input-output relations.\r\nIn: Neural Theory and Modeling, ed. Reiss, R.F., Palo Alto: Stanford University Press (1964).",
- "tags": [
- {
- "id": 786,
- "tag": "Electrotonus"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 569,
- "tag": "Simplified Models"
- },
- {
- "id": 596,
- "tag": "Synaptic Integration"
- },
- {
- "id": 1312,
- "tag": "ModelDB:116981"
- }
- ],
- "timestamp_created": "2024-01-11 15:28:31.813696+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/116981",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "842": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 842,
- "name": "CA1 pyramidal neuron: h channel-dependent deficit of theta oscill. resonance (Marcelin et al. 2008)",
- "repository_type": "github",
- "summary": "This model was used to confirm and support experimental data\r\nsuggesting that the neuronal/circuitry changes associated with temporal lobe epilepsy,\r\nincluding Ih-dependent inductive mechanisms, can disrupt hippocampal theta function.\r\n",
- "tags": [
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 469,
- "tag": "Epilepsy"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 1313,
- "tag": "ModelDB:116983"
- }
- ],
- "timestamp_created": "2024-01-11 15:28:32.283423+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/116983",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "843": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 843,
- "name": "Working memory circuit with branched dendrites (Morita 2008)",
- "repository_type": "github",
- "summary": "This is a rate-coding model of the neocortical spatial working memory circuit incorporating multiple dendritic branches of the individual pyramidal cell in order to examine how nonlinear dendritic integration, combined with the nonuniform distribution of the external input, affects the behavior of the whole circuit.",
- "tags": [
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 794,
- "tag": "Working memory"
- },
- {
- "id": 1314,
- "tag": "ModelDB:117204"
- }
- ],
- "timestamp_created": "2024-01-11 15:28:32.759211+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/117204",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "844": {
- "auto_sync": true,
- "content_types": "modeling",
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- "modeling"
- ],
- "default_context": "master",
- "id": 844,
- "name": "Excitability of PFC Basal Dendrites (Acker and Antic 2009)",
- "repository_type": "github",
- "summary": "\".. We\r\ncarried out multi-site voltage-sensitive dye imaging of membrane potential transients from thin basal\r\nbranches of prefrontal cortical pyramidal neurons before and after application of channel blockers. We\r\nfound that backpropagating action potentials (bAPs) are predominantly controlled by voltage-gated\r\nsodium and A-type potassium channels. In contrast, pharmacologically blocking the delayed rectifier\r\npotassium, voltage-gated calcium or Ih, conductance had little effect on dendritic action potential\r\npropagation. Optically recorded bAP waveforms were quantified and multicompartmental modeling\r\n(NEURON) was used to link the observed behavior with the underlying biophysical properties. The\r\nbest-fit model included a non-uniform sodium channel distribution with decreasing conductance with\r\ndistance from the soma, together with a non-uniform (increasing) A-type potassium conductance. AP\r\namplitudes decline with distance in this model, but to a lesser extent than previously thought. We used\r\nthis model to explore the mechanisms underlying two sets of published data involving high frequency\r\ntrains of action potentials, and the local generation of sodium spikelets. ...\"",
- "tags": [
- {
- "id": 579,
- "tag": "Active Dendrites"
- },
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 572,
- "tag": "Calcium dynamics"
- },
- {
- "id": 565,
- "tag": "Dendritic Action Potentials"
- },
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 589,
- "tag": "I L high threshold"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 575,
- "tag": "I T low threshold"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 568,
- "tag": "Parameter Fitting"
- },
- {
- "id": 1315,
- "tag": "ModelDB:117207"
- }
- ],
- "timestamp_created": "2024-01-11 15:28:33.240461+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/117207",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "845": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 845,
- "name": "Hodgkin-Huxley simplifed 2D and 3D models (Lundstrom et al. 2009)",
- "repository_type": "github",
- "summary": "\"Neuronal responses are often characterized by the\r\nfiring rate as a function of the stimulus mean, or the f\u2013I curve.\r\n\r\nWe introduce a novel classification of neurons into Types A,\r\nB−, and B+ according to how f\u2013I curves are modulated by\r\ninput fluctuations. ...\"\r\n",
- "tags": [
- {
- "id": 804,
- "tag": "Bifurcation"
- },
- {
- "id": 755,
- "tag": "C or Cplusplus program"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 569,
- "tag": "Simplified Models"
- },
- {
- "id": 720,
- "tag": "Temporal Pattern Generation"
- },
- {
- "id": 759,
- "tag": "XPPAUT"
- },
- {
- "id": 1316,
- "tag": "ModelDB:117330"
- }
- ],
- "timestamp_created": "2024-01-11 15:28:33.779886+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/117330",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "846": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 846,
- "name": "Quantal neurotransmitter release kinetics with fixed and mobile Ca2+ buffers (Gilmanov et al. 2008)",
- "repository_type": "github",
- "summary": "\"... In this work, we used computer modeling of\r\nquanta release kinetics with various levels of calcium influx\r\nand in the presence of endogenous calcium buffers with\r\nvarying mobilities. \r\n\r\nThe results of this modeling revealed\r\nthe desynchronization of quanta release under low calcium\r\ninflux in the presence of an endogenous fixed calcium\r\nbuffer, with a diffusion coefficient much smaller than that\r\nof free Ca2+, and synchronization occurred upon adding a\r\nmobile buffer. This corresponds to changes in secretion\r\ntime course parameters found experimentally ...\"\r\n",
- "tags": [
- {
- "id": 572,
- "tag": "Calcium dynamics"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 864,
- "tag": "Pascal (web link to model)"
- },
- {
- "id": 1317,
- "tag": "ModelDB:117351"
- }
- ],
- "timestamp_created": "2024-01-11 15:28:34.247392+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/117351",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "847": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 847,
- "name": "Numerical Integration of Izhikevich and HH model neurons (Stewart and Bair 2009)",
- "repository_type": "github",
- "summary": "The Parker-Sochacki method is a new technique for the numerical integration of differential equations applicable to many neuronal models.\r\nUsing this method, the solution order can be adapted according to the local conditions at each time step, enabling adaptive error control without changing the integration timestep. \r\nWe apply the Parker-Sochacki method to the Izhikevich \u2018simple\u2019 model and a Hodgkin-Huxley\r\ntype neuron, comparing the results with those obtained using the Runge-Kutta and Bulirsch-Stoer methods.",
- "tags": [
- {
- "id": 755,
- "tag": "C or Cplusplus program"
- },
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 756,
- "tag": "Methods"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 569,
- "tag": "Simplified Models"
- },
- {
- "id": 1318,
- "tag": "ModelDB:117361"
- }
- ],
- "timestamp_created": "2024-01-11 15:28:34.719010+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/117361",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "848": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 848,
- "name": "Competition for AP initiation sites in a circuit controlling simple learning (Cruz et al. 2007)",
- "repository_type": "github",
- "summary": "\"The spatial and temporal patterns of action potential initiations were studied in a behaving leech preparation to determine the basis of increased firing that accompanies sensitization, a form of non-associative learning requiring the\r\nS-interneurons.\r\n\r\n...\r\nThe S-interneurons, one in each ganglion and linked by electrical synapses with both neighbors to form a chain, are interposed between sensory\r\nand motor neurons.\r\n\r\n...\r\n the single site with the largest initiation rate, the S-cell in the\r\nstimulated segment, suppressed initiations in adjacent ganglia.\r\n\r\nExperiments showed this was both because (1) it received the earliest, greatest input and (2) the delayed synaptic\r\ninput to the adjacent S-cells coincided with the action potential refractory period.\r\n\r\nA compartmental model of the S-cell and its inputs showed that a simple, intrinsic mechanism of inexcitability after each action potential may account for suppression of impulse initiations.\r\n\r\nThus, a non-synaptic competition between neurons alters synaptic integration in the chain.\r\n\r\nIn one mode, inputs to different sites sum independently, whereas in another, synaptic input to a single site precisely specifies the overall pattern of activity.\"\r\n",
- "tags": [
- {
- "id": 727,
- "tag": "Action Potential Initiation"
- },
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 591,
- "tag": "I K,leak"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 587,
- "tag": "Spatio-temporal Activity Patterns"
- },
- {
- "id": 1319,
- "tag": "ModelDB:117459"
- }
- ],
- "timestamp_created": "2024-01-11 15:28:35.201487+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/117459",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "849": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 849,
- "name": "Rat alpha7 nAChR desensitization is modulated by W55 (Gay et al. 2008)",
- "repository_type": "github",
- "summary": "\"The rat alpha7 nicotinic acetylcholine receptor (nAChR) can undergo rapid onset of desensitization; however, the mechanisms of desensitization are largely unknown. \r\n\r\nThe contribution of a tryptophan (W) residue at position 55 of the rat alpha7 nAChR subunit, which lies within the beta2 strand, was studied by mutating it to other hydrophobic and/or aromatic amino acids, followed by voltage-clamp experiments in Xenopus oocytes. \r\n\r\nWhen mutated to alanine, the alpha7-W55A nAChR desensitized more slowly, and recovered from desensitization more rapidly, than wildtype alpha7 nAChRs. \r\n\r\nThe contribution of desensitization was validated by kinetic modelling. ...\"",
- "tags": [
- {
- "id": 567,
- "tag": "Ion Channel Kinetics"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 865,
- "tag": "Pascal/Delphi"
- },
- {
- "id": 1320,
- "tag": "ModelDB:117508"
- }
- ],
- "timestamp_created": "2024-01-11 15:28:35.682981+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/117508",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "850": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 850,
- "name": "Reverse-time correlation analysis for idealized orientation tuning dynamics (Kovacic et al. 2008)",
- "repository_type": "github",
- "summary": "\"A theoretical analysis is presented of a\r\nreverse-time correlation method used in experimentally\r\ninvestigating orientation tuning dynamics of\r\nneurons in the primary visual cortex.\r\n\r\nAn exact mathematical\r\ncharacterization of the method is developed,\r\nand its connection with the Volterra\u2013Wiener nonlinear\r\nsystems theory is described.\r\n\r\nVarious mathematical\r\nconsequences and possible physiological implications\r\nof this analysis are illustrated using exactly solvable\r\nidealized models of orientation tuning.\"",
- "tags": [
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 756,
- "tag": "Methods"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 726,
- "tag": "Vision"
- },
- {
- "id": 1321,
- "tag": "ModelDB:117514"
- }
- ],
- "timestamp_created": "2024-01-11 15:28:36.143632+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/117514",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "851": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 851,
- "name": "Experimental and modeling studies of desensitization of P2X3 receptors (Sokolova et al. 2006)",
- "repository_type": "github",
- "summary": "\"The function of ATP-activated P2X3 receptors involved in pain sensation is modulated by desensitization, a phenomenon poorly understood.\r\n\r\nThe present study used patch-clamp recording from cultured rat or mouse sensory neurons and kinetic\r\nmodeling to clarify the properties of P2X3 receptor desensitization.\r\n\r\n...\r\nDesensitization properties were well accounted for by a cyclic model in which\r\nreceptors could be desensitized from either open or closed\r\nstates.\r\n\r\nRecovery was assumed to be a multistate process with distinct kinetics dependent on the agonist-dependent dissociation rate from desensitized receptors.\r\n\r\n...\r\nBy using subthreshold concentrations of an HAD (high-affinity desensitization)-potent agonist, it might be possible\r\nto generate sustained inhibition of P2X3 receptors for controlling\r\nchronic pain.\"",
- "tags": [
- {
- "id": 567,
- "tag": "Ion Channel Kinetics"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 775,
- "tag": "Nociception"
- },
- {
- "id": 865,
- "tag": "Pascal/Delphi"
- },
- {
- "id": 1322,
- "tag": "ModelDB:117691"
- }
- ],
- "timestamp_created": "2024-01-11 15:28:36.608634+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/117691",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "852": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 852,
- "name": "Simulation system of spinal cord motor nuclei and assoc. nerves and muscles (Cisi and Kohn 2008)",
- "repository_type": "github",
- "summary": "A Web-based simulation system of the spinal\r\ncord circuitry responsible for muscle control is described.\r\nThe simulator employs two-compartment motoneuron\r\nmodels for S, FR and FF types, with synaptic inputs acting\r\nthrough conductance variations. \r\n\r\nFour motoneuron pools\r\nwith their associated interneurons are represented in the\r\nsimulator, with the possibility of inclusion of more than\r\n2,000 neurons and 2,000,000 synapses. \r\n\r\n... \r\nInputs to the motoneuron pool come from populations of\r\ninterneurons (Ia reciprocal inhibitory interneurons, Ib\r\ninterneurons, and Renshaw cells) and from stochastic point\r\nprocesses associated with descending tracts. \r\n\r\n...\r\nThe generation of the H-reflex\r\nby the Ia-motoneuron pool system and its modulation\r\nby spinal cord interneurons is included in the simulation\r\nsystem.\r\n",
- "tags": [
- {
- "id": 849,
- "tag": "Java (web link to model)"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 720,
- "tag": "Temporal Pattern Generation"
- },
- {
- "id": 1323,
- "tag": "ModelDB:117810"
- }
- ],
- "timestamp_created": "2024-01-11 15:28:37.062494+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/117810",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "853": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 853,
- "name": "Spike Response Model simulator (Jolivet et al. 2004, 2006, 2008)",
- "repository_type": "github",
- "summary": "The Spike Response Model (SRM) optimized on the experimental data in the Single-Neuron modelling Competition ( www.incf.org/community/competitions ) for edition 2007 and edition 2008. The Spike Response Model is a simplified model of neuronal excitability where current linearly integrates to an artificial threshold. After the spike, the threshold is augmented and the voltage follows a voltage kernel that is the average voltage trace during and after a spike. The parameters were chosen to best fit the observed spike times with a method outlined in Jolivet et al. (2006).",
- "tags": [
- {
- "id": 727,
- "tag": "Action Potential Initiation"
- },
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 568,
- "tag": "Parameter Fitting"
- },
- {
- "id": 569,
- "tag": "Simplified Models"
- },
- {
- "id": 1324,
- "tag": "ModelDB:117966"
- }
- ],
- "timestamp_created": "2024-01-11 15:28:37.751852+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/117966",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "854": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 854,
- "name": "Roles of I(A) and morphology in AP prop. in CA1 pyramidal cell dendrites (Acker and White 2007)",
- "repository_type": "github",
- "summary": "\" ...Using conductance-based models of CA1 pyramidal cells, we show that underlying \u201ctraveling wave attractors\u201d control action potential propagation in the apical dendrites. \r\n\r\nBy computing these attractors, we dissect and quantify the effects of IA channels and dendritic morphology on bAP amplitudes. \r\n\r\nWe find that non-uniform activation properties of IA can lead to backpropagation failure similar to that observed experimentally in these cells. \r\n... \"",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 579,
- "tag": "Active Dendrites"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 570,
- "tag": "Influence of Dendritic Geometry"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 759,
- "tag": "XPPAUT"
- },
- {
- "id": 1325,
- "tag": "ModelDB:118014"
- }
- ],
- "timestamp_created": "2024-01-11 15:28:38.317615+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/118014",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "855": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 855,
- "name": "Reduction of nonlinear ODE systems possessing multiple scales (Clewley et al. 2005)",
- "repository_type": "github",
- "summary": "\" ... We introduce a combined numerical and analytical technique that aids the identification of structure in a class of systems of nonlinear ordinary differential\r\nequations (ODEs) that are commonly applied in dynamical models of physical processes.\r\n... \r\nThese methods have been incorporated into a new software tool named Dssrt, which we demonstrate\r\non a limit cycle of a synaptically driven Hodgkin\u2013Huxley neuron model.\"",
- "tags": [
- {
- "id": 804,
- "tag": "Bifurcation"
- },
- {
- "id": 767,
- "tag": "MATLAB (web link to model)"
- },
- {
- "id": 756,
- "tag": "Methods"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 866,
- "tag": "Multiscale"
- },
- {
- "id": 830,
- "tag": "XPP (web link to model)"
- },
- {
- "id": 1326,
- "tag": "ModelDB:118020"
- }
- ],
- "timestamp_created": "2024-01-11 15:28:38.790234+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/118020",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
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- "modeling"
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- "default_context": "master",
- "id": 856,
- "name": "A model of the femur-tibia control system in stick insects (Stein et al. 2008)",
- "repository_type": "github",
- "summary": "We studied the femur-tibia joint control system of the insect leg, and its switch between resistance reflex in posture control and \"active reaction\" in walking. The \"active reaction\" is basically a reversal of the resistance reflex. Both responses are elicited by the same sensory input and the same neuronal network (the femur-tibia network). \r\nThe femur-tibia network was modeled by fitting the responses of model neurons to those obtained in animals. Each implemented neuron has a physiological counterpart. The strengths of 16 interneuronal pathways that integrate sensory input were then assigned three different values and varied independently, generating a database of more than 43 million network variants. The uploaded version contains the model that best represented the resistance reflex. Please see the README for more help.\r\nWe demonstrate that the combinatorial code of interneuronal pathways determines motor output. A switch between different behaviors such as standing to walking can thus be achieved by altering the strengths of selected sensory integration pathways.\r\n",
- "tags": [
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 729,
- "tag": "Invertebrate"
- },
- {
- "id": 867,
- "tag": "MadSim"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 596,
- "tag": "Synaptic Integration"
- },
- {
- "id": 1327,
- "tag": "ModelDB:118092"
- }
- ],
- "timestamp_created": "2024-01-11 15:28:39.311052+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/118092",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "857": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 857,
- "name": "Ca3 pyramidal neuron: membrane response near rest (Hemond et al. 2009)",
- "repository_type": "github",
- "summary": "In this paper, the model was used to show how the temporal summation of excitatory inputs in CA3 pyramidal neurons was affected by the presence of Ih in the dendrites in a frequency- and distance-dependent fashion.",
- "tags": [
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 596,
- "tag": "Synaptic Integration"
- },
- {
- "id": 1328,
- "tag": "ModelDB:118098"
- }
- ],
- "timestamp_created": "2024-01-11 15:28:39.819130+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/118098",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "858": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 858,
- "name": "Evaluation of stochastic diff. eq. approximation of ion channel gating models (Bruce 2009)",
- "repository_type": "github",
- "summary": "Fox and Lu derived an algorithm based on stochastic differential equations for approximating the kinetics of ion channel gating that is simpler and faster than \"exact\" algorithms for simulating Markov process models of channel gating.\r\n\r\nHowever, the approximation may not be sufficiently accurate to predict statistics of action potential generation in some cases.\r\n\r\nThe objective of this study was to develop a framework for analyzing the inaccuracies and determining their origin.\r\n\r\nSimulations of a patch of membrane with voltage-gated sodium and potassium channels were performed using an exact algorithm for the kinetics of channel gating and the approximate algorithm of Fox & Lu.\r\n...\r\nThe results indicate that: (i) the source of the inaccuracy is that the Fox & Lu algorithm does not adequately describe the combined behavior of the multiple activation particles in each sodium and potassium channel, and (ii) the accuracy does not improve with increasing numbers of channels.",
- "tags": [
- {
- "id": 567,
- "tag": "Ion Channel Kinetics"
- },
- {
- "id": 767,
- "tag": "MATLAB (web link to model)"
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- {
- "id": 756,
- "tag": "Methods"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1329,
- "tag": "ModelDB:118195"
- }
- ],
- "timestamp_created": "2024-01-11 15:28:40.284510+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/118195",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "859": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 859,
- "name": "Tag Trigger Consolidation (Clopath and Ziegler et al. 2008)",
- "repository_type": "github",
- "summary": "This model simulates different phases of LTP/D, i.e. the induction or early phase, the setting of synaptic tags, a trigger process for protein synthesis, and a slow transition leading to synaptic consolidation namely the late phase of synaptic plasticity. The model explains a large body of experimental data on synaptic tagging and capture, cross-tagging, and the late phases of LTP and LTD. Moreover, the model accounts for the dependence of LTP and LTD induction on voltage and presynaptic stimulation frequency.",
- "tags": [
- {
- "id": 749,
- "tag": "Long-term Synaptic Plasticity"
- },
- {
- "id": 772,
- "tag": "Maintenance"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 620,
- "tag": "Python"
- },
- {
- "id": 569,
- "tag": "Simplified Models"
- },
- {
- "id": 725,
- "tag": "Synaptic Plasticity"
- },
- {
- "id": 1330,
- "tag": "ModelDB:118199"
- }
- ],
- "timestamp_created": "2024-01-11 15:28:40.745670+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/118199",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "860": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 860,
- "name": "Multisensory integration in the superior colliculus: a neural network model (Ursino et al. 2009)",
- "repository_type": "github",
- "summary": "\" ... The model includes three distinct neural areas:\r\ntwo unimodal areas (auditory and visual) are devoted to a\r\ntopological representation of external stimuli, and communicate\r\nvia synaptic connections with a third downstream\r\narea (in the SC) responsible for multisensory integration.\r\n\r\nThe present simulations show that the model, with a single\r\nset of parameters, can mimic various responses to different\r\ncombinations of external stimuli including the inverse\r\neffectiveness, both in terms of multisensory enhancement\r\nand contrast, the existence of within- and cross-modality\r\nsuppression between spatially disparate stimuli, a reduction\r\nof network settling time in response to cross-modal stimuli\r\ncompared with individual stimuli.\r\n...\"",
- "tags": [
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 762,
- "tag": "Audition"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 726,
- "tag": "Vision"
- },
- {
- "id": 1331,
- "tag": "ModelDB:118261"
- }
- ],
- "timestamp_created": "2024-01-11 15:28:41.209225+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/118261",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "861": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 861,
- "name": "Moose/PyMOOSE: interoperable scripting in Python for MOOSE (Ray and Bhalla 2008)",
- "repository_type": "github",
- "summary": "\" ... We report the integration of Python scripting with the Multi-scale Object Oriented Simulation Environment (MOOSE). MOOSE is a general-purpose simulation system for compartmental neuronal models and for models of signaling pathways based on chemical kinetics. We show how the Python-scripting version of MOOSE, PyMOOSE, combines the power of a compiled simulator with the versatility and ease of use of Python. ... \"",
- "tags": [
- {
- "id": 868,
- "tag": "MOOSE/PyMOOSE (web link to method)"
- },
- {
- "id": 756,
- "tag": "Methods"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 751,
- "tag": "Signaling pathways"
- },
- {
- "id": 1332,
- "tag": "ModelDB:118326"
- }
- ],
- "timestamp_created": "2024-01-11 15:28:41.666388+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/118326",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "862": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 862,
- "name": "Gap junction coupled network of striatal fast spiking interneurons (Hjorth et al. 2009)",
- "repository_type": "github",
- "summary": "Gap junctions between striatal FS neurons has very weak ability to synchronise spiking. Input uncorrelated between neighbouring neurons is shunted, while correlated input is not.",
- "tags": [
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 600,
- "tag": "GENESIS"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 861,
- "tag": "I_K,Na"
- },
- {
- "id": 567,
- "tag": "Ion Channel Kinetics"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 586,
- "tag": "Synchronization"
- },
- {
- "id": 1333,
- "tag": "ModelDB:118389"
- }
- ],
- "timestamp_created": "2024-01-11 15:28:42.139770+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/118389",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "863": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 863,
- "name": "Phase oscillator models for lamprey central pattern generators (Varkonyi et al. 2008)",
- "repository_type": "github",
- "summary": "In our paper, Varkonyi et al. 2008, we derive phase oscillator models for the lamprey central pattern generator from two biophysically based segmental models. We\r\nstudy intersegmental coordination and show how these models can provide stable intersegmental phase lags observed in real animals.\r\n",
- "tags": [
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 568,
- "tag": "Parameter Fitting"
- },
- {
- "id": 863,
- "tag": "Parameter sensitivity"
- },
- {
- "id": 823,
- "tag": "Phase Response Curves"
- },
- {
- "id": 587,
- "tag": "Spatio-temporal Activity Patterns"
- },
- {
- "id": 720,
- "tag": "Temporal Pattern Generation"
- },
- {
- "id": 1334,
- "tag": "ModelDB:118392"
- }
- ],
- "timestamp_created": "2024-01-11 15:28:42.616376+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/118392",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "864": {
- "auto_sync": true,
- "content_types": "modeling",
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- "modeling"
- ],
- "default_context": "master",
- "id": 864,
- "name": "Odor supported place cell model and goal navigation in rodents (Kulvicius et al. 2008)",
- "repository_type": "github",
- "summary": "\" ...\r\nHere we model odor supported place cells by using a simple feed-forward network and analyze the impact of olfactory cues on place cell formation and spatial navigation. \r\n\r\nThe obtained place cells are used to solve a goal navigation task by a novel mechanism based on self-marking by odor patches combined with a Q-learning algorithm. \r\n\r\nWe also analyze the impact of place cell remapping on goal directed behavior when switching between two environments. \r\n...\"",
- "tags": [
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 588,
- "tag": "Olfaction"
- },
- {
- "id": 799,
- "tag": "Place cell/field"
- },
- {
- "id": 791,
- "tag": "Rate-coding model neurons"
- },
- {
- "id": 809,
- "tag": "Reinforcement Learning"
- },
- {
- "id": 800,
- "tag": "Spatial Navigation"
- },
- {
- "id": 1335,
- "tag": "ModelDB:118434"
- }
- ],
- "timestamp_created": "2024-01-11 15:28:43.080251+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/118434",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "865": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 865,
- "name": "Virtual Retina: biological retina simulator, with contrast gain control (Wohrer and Kornprobst 2009)",
- "repository_type": "github",
- "summary": "\"We propose a new retina simulation software, called Virtual Retina, which transforms a video into spike trains.\r\n\r\nOur goal is twofold: Allow large scale simulations (up to 100,000 neurons) in reasonable processing times and keep a strong biological plausibility, taking into account implementation constraints. \r\n\r\n...\r\nThis software will be an evolutionary tool for neuroscientists that need realistic large-scale input spike trains in subsequent treatments, and for educational purposes.\"",
- "tags": [
- {
- "id": 776,
- "tag": "C or Cplusplus program (web link to model)"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 569,
- "tag": "Simplified Models"
- },
- {
- "id": 1336,
- "tag": "ModelDB:118524"
- }
- ],
- "timestamp_created": "2024-01-11 15:28:43.634387+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/118524",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "866": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 866,
- "name": "Calyx of Held, short term plasticity (Yang Z et al. 2009)",
- "repository_type": "github",
- "summary": "This model investigates mechanisms contributing to short term plasticity at the calyx of Held, a giant glutamatergic synapse in the mammalian brainstem auditory system. It is a stochastic version of the model described in:\r\n \r\nHennig, M., Postlethwaite, M., Forsythe, I.D. and Graham, B.P. (2007). A biophysical model of short-term plasticity at the calyx of Held. \r\nNeurocomputing, 70:1626-1629.\r\n\r\nThis version introduces stochastic vesicle recycling and release. It has been used to investigate the information transmission\r\nproperties of this synapse, as detailed in:\r\n\r\nYang, Z., Hennig, M., Postlethwaite, M., Forsythe, I.D. and Graham, B.P. (2008). \r\nWide-band information transmission at the calyx of Held. Neural Computation, 21(4):991-1018.\r\n",
- "tags": [
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 724,
- "tag": "Short-term Synaptic Plasticity"
- },
- {
- "id": 753,
- "tag": "Vestibular"
- },
- {
- "id": 1337,
- "tag": "ModelDB:118554"
- }
- ],
- "timestamp_created": "2024-01-11 15:28:44.091127+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/118554",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "867": {
- "auto_sync": true,
- "content_types": "modeling",
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- "modeling"
- ],
- "default_context": "master",
- "id": 867,
- "name": "Response properties of neocort. neurons to temporally modulated noisy inputs (Koendgen et al. 2008)",
- "repository_type": "github",
- "summary": "Neocortical neurons are classified by current\u2013frequency relationship. This is a static description and it may be inadequate to interpret neuronal responses to time-varying stimuli. \r\n\r\nTheoretical studies (Brunel et al., 2001; Fourcaud-Trocm\u00e9 et al. 2003; Fourcaud-Trocm\u00e9 and Brunel 2005; Naundorf et al. 2005) suggested that single-cell dynamical response properties are necessary to interpret ensemble responses to fast input transients. Further, it was shown that input-noise linearizes and boosts the response bandwidth, and that the interplay between the barrage of noisy synaptic currents and the spike-initiation mechanisms determine the dynamical properties of the firing rate. \r\n\r\nIn order to allow a reader to explore such simulations, we prepared a simple NEURON implementation of the experiments performed in K\u00f6ndgen et al., 2008 (see also Fourcaud-Trocm\u00e9 al. 2003; Fourcaud-Trocm\u00e9 and Brunel 2005).\r\n\r\nIn addition, we provide sample MATLAB routines for exploring the sandwich model proposed in K\u00f6ndgen et al., 2008, employing a simple frequdency-domain filtering.\r\n\r\nThe simulations and the MATLAB routines are based on the linear response properties of layer 5 pyramidal cells estimated by injecting a superposition of a small-amplitude sinusoidal wave and a background noise, as in K\u00f6ndgen et al., 2008.",
- "tags": [
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 756,
- "tag": "Methods"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 568,
- "tag": "Parameter Fitting"
- },
- {
- "id": 791,
- "tag": "Rate-coding model neurons"
- },
- {
- "id": 1338,
- "tag": "ModelDB:118631"
- }
- ],
- "timestamp_created": "2024-01-11 15:28:44.558785+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/118631",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "868": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 868,
- "name": "Drosophila projection neuron electrotonic structure (Gouwens and Wilson 2009)",
- "repository_type": "github",
- "summary": "We address the issue of how electrical signals propagate in Drosophila neurons by modeling the electrotonic structure of the antennal lobe projection neurons innervating glomerulus DM1. The readme file contains instructions for running the model.",
- "tags": [
- {
- "id": 786,
- "tag": "Electrotonus"
- },
- {
- "id": 729,
- "tag": "Invertebrate"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 1339,
- "tag": "ModelDB:118662"
- }
- ],
- "timestamp_created": "2024-01-11 15:28:45.049987+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/118662",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "869": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 869,
- "name": "Permeation and inactivation of CaV1.2 Ca2+ channels (Babich et al. 2007)",
- "repository_type": "github",
- "summary": "The authors present data and a kinetics model of the CaV1.2 channel supporting the idea that Ca2+ block of the pore generates the U-shaped inactivation curve.",
- "tags": [
- {
- "id": 869,
- "tag": "CalC Calcium Calculator (web link to model)"
- },
- {
- "id": 589,
- "tag": "I L high threshold"
- },
- {
- "id": 567,
- "tag": "Ion Channel Kinetics"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1340,
- "tag": "ModelDB:118759"
- }
- ],
- "timestamp_created": "2024-01-11 15:28:45.676498+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/118759",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "870": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 870,
- "name": "Facilitation model based on bound Ca2+ (Matveev et al. 2006)",
- "repository_type": "github",
- "summary": "\"Facilitation is a transient stimulation-induced increase in synaptic response, a\r\nubiquitous form of short-term synaptic plasticity that can regulate\r\nsynaptic transmission on fast time scales. \r\n\r\nIn their pioneering work, Katz and Miledi and Rahamimoff demonstrated the dependence of\r\nfacilitation on presynaptic Ca2+ influx and proposed that facilitation\r\nresults from the accumulation of residual Ca2+ bound to vesicle\r\nrelease triggers. \r\n\r\nHowever, this bound Ca2+ hypothesis appears to contradict the evidence that \r\nfacilitation is reduced by exogenous Ca2+ buffers. \r\n\r\nThis conclusion led to a widely held view that facilitation\r\nmust depend solely on the accumulation of Ca2+ in free form. \r\n\r\nHere we consider a more realistic implementation of the bound Ca2+\r\nmechanism, taking into account spatial diffusion of Ca2+, and show\r\nthat a model with slow Ca2+ unbinding steps can retain sensitivity to\r\nfree residual Ca2+. \r\n...\"",
- "tags": [
- {
- "id": 869,
- "tag": "CalC Calcium Calculator (web link to model)"
- },
- {
- "id": 572,
- "tag": "Calcium dynamics"
- },
- {
- "id": 723,
- "tag": "Facilitation"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1341,
- "tag": "ModelDB:118797"
- }
- ],
- "timestamp_created": "2024-01-11 15:28:46.273904+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/118797",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "871": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 871,
- "name": "Loss of phase-locking in non-weakly coupled inhib. networks of type-I neurons (Oh and Matveev 2009)",
- "repository_type": "github",
- "summary": "...\r\nHere we examine the loss of\r\nsynchrony caused by an increase in inhibitory coupling\r\nin networks of type-I Morris\u2013Lecar model oscillators,\r\nwhich is characterized by a period-doubling cascade\r\nand leads to mode-locked states with alternation in the\r\nfiring order of the two cells, as reported recently by\r\nMaran and Canavier (J Comput Nerosci, 2008) for a\r\nnetwork of Wang-Buzs\u00e1ki model neurons. \r\n\r\nAlthough\r\nalternating-order firing has been previously reported as\r\na near-synchronous state, we show that the stable phase\r\ndifference between the spikes of the two Morris\u2013Lecar\r\ncells can constitute as much as 70% of the unperturbed\r\noscillation period. \r\n\r\nFurther, we examine the generality\r\nof this phenomenon for a class of type-I oscillators that\r\nare close to their excitation thresholds, and provide\r\nan intuitive geometric description of such \u201cleap-frog\u201d\r\ndynamics. \r\n...\"",
- "tags": [
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 767,
- "tag": "MATLAB (web link to model)"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 569,
- "tag": "Simplified Models"
- },
- {
- "id": 586,
- "tag": "Synchronization"
- },
- {
- "id": 720,
- "tag": "Temporal Pattern Generation"
- },
- {
- "id": 1342,
- "tag": "ModelDB:118799"
- }
- ],
- "timestamp_created": "2024-01-11 15:28:46.760530+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/118799",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "872": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 872,
- "name": "Stochastic automata network Markov model descriptors of coupled Ca2+ channels (Nguyen et al. 2005)",
- "repository_type": "github",
- "summary": "\"... Here we present a formalism by which mathematical models for Ca2+-regulated Ca2+ release sites\r\nare derived from stochastic models of single-channel gating that include Ca2+ activation, Ca2+\r\ninactivation, or both. \r\n\r\nSuch models are stochastic automata networks (SANs) that involve a large\r\nnumber of functional transitions, that is, the transition probabilities of the infinitesimal generator\r\nmatrix of one of the automata (i.e., an individual channel) may depend on the local [Ca2+] and\r\nthus the state of the other channels. Simulation and analysis of the SAN descriptors representing\r\nhomogeneous clusters of intracellular Ca2+ channels show that (1) release site density can modify\r\nboth the steady-state open probability and stochastic excitability of Ca2+ release sites, (2) Ca2+\r\ninactivation is not a requirement for Ca2+ puffs or sparks, and (3) a single-channel model with a\r\nbell-shaped open probability curve does not lead to release site activity that is a biphasic function of\r\nrelease site density.\r\n...\"",
- "tags": [
- {
- "id": 869,
- "tag": "CalC Calcium Calculator (web link to model)"
- },
- {
- "id": 572,
- "tag": "Calcium dynamics"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 567,
- "tag": "Ion Channel Kinetics"
- },
- {
- "id": 748,
- "tag": "Markov-type model"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1343,
- "tag": "ModelDB:118894"
- }
- ],
- "timestamp_created": "2024-01-11 15:28:47.236737+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/118894",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "873": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 873,
- "name": "CA1 pyramidal neurons: effects of a Kv7.2 mutation (Miceli et al. 2009)",
- "repository_type": "github",
- "summary": "NEURON mod files from the paper:\r\nMiceli et al, Neutralization of a unique, negatively-charged residue in the voltage sensor \r\nof K(V)7.2 subunits in a sporadic case of benign familial neonatal seizures, Neurobiol Dis., in press (2009).\r\nIn this paper, the model revealed that the gating changes introduced by a mutation in K(v)7.2 \r\ngenes encoding for the neuronal KM current in a case of benign familial neonatal seizures,\r\nincreased cell firing frequency, thereby triggering the neuronal hyperexcitability which underlies the observed neonatal epileptic condition.\r\n",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 579,
- "tag": "Active Dendrites"
- },
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 580,
- "tag": "I M"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 575,
- "tag": "I T low threshold"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 567,
- "tag": "Ion Channel Kinetics"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 1344,
- "tag": "ModelDB:118986"
- }
- ],
- "timestamp_created": "2024-01-11 15:28:47.737646+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/118986",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "874": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 874,
- "name": "Facilitation through buffer saturation (Matveev et al. 2004)",
- "repository_type": "github",
- "summary": "\"... Using computer simulations, we\r\nstudy the magnitude of synaptic facilitation (SF) that can be achieved by a buffer saturation mechanism (BSM), and explore its dependence on the\r\nendogenous buffering properties.\r\n...\"",
- "tags": [
- {
- "id": 869,
- "tag": "CalC Calcium Calculator (web link to model)"
- },
- {
- "id": 572,
- "tag": "Calcium dynamics"
- },
- {
- "id": 723,
- "tag": "Facilitation"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 725,
- "tag": "Synaptic Plasticity"
- },
- {
- "id": 1345,
- "tag": "ModelDB:119153"
- }
- ],
- "timestamp_created": "2024-01-11 15:28:48.243552+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/119153",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "875": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 875,
- "name": "STDP promotes synchrony of inhibitory networks in the presence of heterogeneity (Talathi et al 2008)",
- "repository_type": "github",
- "summary": "\"Recently Haas et al. (J Neurophysiol 96:\r\n3305\u20133313, 2006), observed a novel form of spike timing\r\ndependent plasticity (iSTDP) in GABAergic synaptic\r\ncouplings in layer II of the entorhinal cortex. Depending\r\non the relative timings of the presynaptic input at\r\ntime tpre and the postsynaptic excitation at time tpost,\r\nthe synapse is strengthened (delta_t = t(post) - t(pre) > 0) or\r\nweakened (delta_t < 0). The temporal dynamic range of\r\nthe observed STDP rule was found to lie in the higher\r\ngamma frequency band (> or = 40 Hz), a frequency range\r\nimportant for several vital neuronal tasks. In this paper\r\nwe study the function of this novel form of iSTDP in\r\nthe synchronization of the inhibitory neuronal network.\r\nIn particular we consider a network of two unidirectionally\r\ncoupled interneurons (UCI) and two mutually\r\ncoupled interneurons (MCI), in the presence of\r\nheterogeneity in the intrinsic firing rates of each coupled\r\nneuron. ...\"",
- "tags": [
- {
- "id": 755,
- "tag": "C or Cplusplus program"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 802,
- "tag": "STDP"
- },
- {
- "id": 1346,
- "tag": "ModelDB:119159"
- }
- ],
- "timestamp_created": "2024-01-11 15:28:48.708368+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/119159",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "876": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 876,
- "name": "New and corrected simulations of synaptic facilitation (Matveev et al. 2002)",
- "repository_type": "github",
- "summary": "\"A three-dimensional presynaptic calcium diffusion model developed to account for characteristics of transmitter release\r\nwas modified to provide for binding of calcium to a receptor and subsequent triggering of exocytosis. \r\n\r\nWhen low affinity (20 FLM) and\r\nrapid kinetics were assumed for the calcium receptor triggering exocytosis, and stimulus parameters were selected to match those\r\nof experiments, the simulations predicted a virtual invariance of the time course of transmitter release to paired stimulation,\r\nstimulation with pulses of different amplitude, and stimulation in different calcium solutions. \r\n...\"",
- "tags": [
- {
- "id": 869,
- "tag": "CalC Calcium Calculator (web link to model)"
- },
- {
- "id": 572,
- "tag": "Calcium dynamics"
- },
- {
- "id": 723,
- "tag": "Facilitation"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1347,
- "tag": "ModelDB:119214"
- }
- ],
- "timestamp_created": "2024-01-11 15:28:49.262124+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/119214",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "877": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 877,
- "name": "Modelling reduced excitability in aged CA1 neurons as a Ca-dependent process (Markaki et al. 2005)",
- "repository_type": "github",
- "summary": "\"We use a multi-compartmental model of a CA1 pyramidal cell to study changes in hippocampal excitability that result from aging-induced alterations in calcium-dependent membrane mechanisms.\r\n\r\nThe model incorporates N- and L-type calcium channels which are respectively coupled to fast and slow afterhyperpolarization potassium channels.\r\n\r\nModel parameters are calibrated using physiological data.\r\n\r\nComputer simulations reproduce the decreased excitability of aged CA1 cells, which results from increased internal calcium accumulation, subsequently larger postburst slow afterhyperpolarization, and enhanced spike frequency adaptation.\r\n\r\nWe find that aging-induced alterations in CA1 excitability can be modelled with simple coupling mechanisms that selectively link specific types of calcium channels to specific calcium-dependent potassium channels.\"",
- "tags": [
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 827,
- "tag": "Aging/Alzheimer`s"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 589,
- "tag": "I L high threshold"
- },
- {
- "id": 580,
- "tag": "I M"
- },
- {
- "id": 721,
- "tag": "I N"
- },
- {
- "id": 739,
- "tag": "I Na,p"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 844,
- "tag": "I R"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 1348,
- "tag": "ModelDB:119266"
- }
- ],
- "timestamp_created": "2024-01-11 15:28:49.790053+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/119266",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "878": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 878,
- "name": "Computational neuropharmacology of CA1 pyramidal neuron (Ferrante et al. 2008)",
- "repository_type": "github",
- "summary": "In this paper, the model was used to show how neuroactive drugs targeting different neuronal mechanisms affect the signal integration in CA1 pyramidal neuron. Ferrante M, Blackwell KT, Migliore M, Ascoli GA (2008)",
- "tags": [
- {
- "id": 727,
- "tag": "Action Potential Initiation"
- },
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 827,
- "tag": "Aging/Alzheimer`s"
- },
- {
- "id": 469,
- "tag": "Epilepsy"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 801,
- "tag": "Parkinson's"
- },
- {
- "id": 787,
- "tag": "Pathophysiology"
- },
- {
- "id": 845,
- "tag": "Schizophrenia"
- },
- {
- "id": 777,
- "tag": "Spike Frequency Adaptation"
- },
- {
- "id": 596,
- "tag": "Synaptic Integration"
- },
- {
- "id": 1349,
- "tag": "ModelDB:119283"
- }
- ],
- "timestamp_created": "2024-01-11 15:28:50.320240+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/119283",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "879": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 879,
- "name": "Transmitter release and Ca diffusion models (Yamada and Zucker 1992)",
- "repository_type": "github",
- "summary": "\"A three-dimensional presynaptic calcium diffusion model developed to account for characteristics of transmitter release was modified to provide for binding of calcium to a receptor and subsequent triggering of exocytosis. ...\"",
- "tags": [
- {
- "id": 869,
- "tag": "CalC Calcium Calculator (web link to model)"
- },
- {
- "id": 572,
- "tag": "Calcium dynamics"
- },
- {
- "id": 723,
- "tag": "Facilitation"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1350,
- "tag": "ModelDB:120115"
- }
- ],
- "timestamp_created": "2024-01-11 15:28:50.797766+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/120115",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "880": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 880,
- "name": "TTX-R Na+ current effect on cell response (Herzog et al 2001) (MATLAB)",
- "repository_type": "github",
- "summary": "\"Small dorsal root ganglion (DRG) neurons, which include nociceptors, express multiple voltage-gated sodium currents. In addition to a classical fast inactivating tetrodotoxin-sensitive (TTX-S) sodium current, many of these cells express a TTX-resistant (TTX-R) sodium current that activates near -70 mV and is persistent at negative potentials. To investigate the possible contributions of this TTX-R persistent (TTX-RP) current to neuronal excitability, we carried out computer simulations using the Neuron program with TTX-S and -RP currents, fit by the Hodgkin-Huxley model, that closely matched the currents recorded from small DRG neurons. ...\" See paper for more and details.",
- "tags": [
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 739,
- "tag": "I Na,p"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 567,
- "tag": "Ion Channel Kinetics"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 775,
- "tag": "Nociception"
- },
- {
- "id": 1351,
- "tag": "ModelDB:120117"
- }
- ],
- "timestamp_created": "2024-01-11 15:28:51.278854+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/120117",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "881": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 881,
- "name": "A finite volume method for stochastic integrate-and-fire models (Marpeau et al. 2009)",
- "repository_type": "github",
- "summary": "\"The stochastic integrate and fire neuron is\r\none of the most commonly used stochastic models\r\nin neuroscience.\r\n\r\nAlthough some cases are analytically\r\ntractable, a full analysis typically calls for numerical\r\nsimulations.\r\n\r\nWe present a fast and accurate finite volume\r\nmethod to approximate the solution of the associated\r\nFokker-Planck equation. ...\"",
- "tags": [
- {
- "id": 870,
- "tag": "FORTRAN (web link to a model)"
- },
- {
- "id": 756,
- "tag": "Methods"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 569,
- "tag": "Simplified Models"
- },
- {
- "id": 1352,
- "tag": "ModelDB:120137"
- }
- ],
- "timestamp_created": "2024-01-11 15:28:51.746598+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/120137",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "882": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 882,
- "name": "A kinetic model unifying presynaptic short-term facilitation and depression (Lee et al. 2009)",
- "repository_type": "github",
- "summary": "\"...\r\n\r\nHere, we propose a unified theory of synaptic short-term plasticity based on realistic yet tractable and testable model descriptions of the underlying intracellular biochemical processes. \r\n\r\nAnalysis of the model equations leads to a closed-form solution of the resonance frequency, a function of several critical biophysical parameters, as the single key indicator of the propensity for synaptic facilitation or depression under repetitive stimuli. \r\n\r\nThis integrative model is supported by a broad range of transient and frequency response experimental data including those from facilitating, depressing or mixed-mode synapses. \r\n... the model provides the reasons behind the switching behavior between facilitation and depression observed in experiments. ...\"\r\n",
- "tags": [
- {
- "id": 572,
- "tag": "Calcium dynamics"
- },
- {
- "id": 722,
- "tag": "Depression"
- },
- {
- "id": 723,
- "tag": "Facilitation"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 824,
- "tag": "Simulink"
- },
- {
- "id": 725,
- "tag": "Synaptic Plasticity"
- },
- {
- "id": 1353,
- "tag": "ModelDB:120184"
- }
- ],
- "timestamp_created": "2024-01-11 15:28:52.238886+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/120184",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "883": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 883,
- "name": "Multistability of clustered states in a globally inhibitory network (Chandrasekaran et al. 2009)",
- "repository_type": "github",
- "summary": "\"We study a network of m identical excitatory cells projecting excitatory synaptic connections onto a single inhibitory interneuron, which is reciprocally coupled to all excitatory cells through inhibitory synapses possessing short-term synaptic depression.\r\n\r\nWe find that such a network with global inhibition possesses multiple stable activity patterns with distinct periods, characterized by the clustering of the excitatory cells into synchronized sub-populations.\r\n\r\nWe prove the existence and stability of n-cluster solutions in a m-cell network.\r\n\r\n... Implications for temporal coding and memory storage are discussed.\"",
- "tags": [
- {
- "id": 718,
- "tag": "Attractor Neural Network"
- },
- {
- "id": 722,
- "tag": "Depression"
- },
- {
- "id": 767,
- "tag": "MATLAB (web link to model)"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 724,
- "tag": "Short-term Synaptic Plasticity"
- },
- {
- "id": 569,
- "tag": "Simplified Models"
- },
- {
- "id": 720,
- "tag": "Temporal Pattern Generation"
- },
- {
- "id": 1354,
- "tag": "ModelDB:120227"
- }
- ],
- "timestamp_created": "2024-01-11 15:28:53.043448+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/120227",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "884": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 884,
- "name": "Contribution of ATP-sensitive potassium channels in the neuronal network (Huang et al. 2009)",
- "repository_type": "github",
- "summary": "Epileptic seizures in diabetic hyperglycemia (DH) are not uncommon. \r\n\r\nThis study aimed to determine the acute behavioral, pathological, and electrophysiological effects of status epilepticus (SE) on diabetic animals. \r\n\r\n...\r\n\r\nWe also used a simulation model to evaluate intracellular adenosine triphosphate (ATP) and neuroexcitability.\r\n\r\n...\r\nIn the simulation, increased intracellular ATP concentration promoted action potential firing.\r\n\r\nThis finding that rats with DH had more brain damage after SE than rats without diabetes suggests the importance of intensively treating hyperglycemia and seizures in diabetic patients with epilepsy.",
- "tags": [
- {
- "id": 795,
- "tag": "ATP-senstive potassium current"
- },
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 469,
- "tag": "Epilepsy"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 759,
- "tag": "XPPAUT"
- },
- {
- "id": 1355,
- "tag": "ModelDB:120243"
- }
- ],
- "timestamp_created": "2024-01-11 15:28:53.589158+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/120243",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "885": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 885,
- "name": "Action potential of adult rat ventricle (Wang et al. 2008)",
- "repository_type": "github",
- "summary": "\"Aconitine (ACO), a highly toxic diterpenoid alkaloid, is recognized to have effects \r\non cardiac voltage-gated Na(+) channels. However, it remains unknown whether it has \r\nany effects on K(+) currents. The effects of ACO on ion currents in differentiated \r\nclonal cardiac (H9c2) cells and in cultured neonatal rat ventricular myocytes were \r\ninvestigated in this study. ...\" The rat action potential in this simulation was played back into the cell for experiments reported in this paper.",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 759,
- "tag": "XPPAUT"
- },
- {
- "id": 1356,
- "tag": "ModelDB:120246"
- }
- ],
- "timestamp_created": "2024-01-11 15:28:54.081488+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/120246",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "886": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 886,
- "name": "A nicotinic acetylcholine receptor kinetic model (Edelstein et al. 1996)",
- "repository_type": "github",
- "summary": "Nicotinic acetylcholine receptors are transmembrane\r\noligomeric proteins that mediate interconversions\r\nbetween open and closed channel states under the\r\ncontrol of neurotransmitters. \r\n\r\n..\r\n\r\nIn order to represent the functional properties of such\r\nreceptors, we have developed a kinetic model that links\r\nconformational interconversion rates to agonist binding\r\nand extends the general principles of the Monod-\r\nWyman-Changeux model of allosteric transitions. \r\n\r\n...\r\nApplication of the model to the peripheral nicotinic acetylcholine receptor\r\n(nAChR) accounts for the main properties of ligand-gating,\r\nincluding single-channel events, and several new\r\nrelationships are predicted.\r\n...\r\nIn terms of future developments, the analysis presented here provides\r\na physical basis for constructing more biologically realistic\r\nmodels of synaptic modulation that may be applied to\r\nartificial neural networks.\r\n",
- "tags": [
- {
- "id": 871,
- "tag": "BioPAX (web link to model)"
- },
- {
- "id": 872,
- "tag": "CellML (web link to model)"
- },
- {
- "id": 567,
- "tag": "Ion Channel Kinetics"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 828,
- "tag": "SBML (web link to model)"
- },
- {
- "id": 854,
- "tag": "Scilab (web link to model)"
- },
- {
- "id": 782,
- "tag": "Virtual Cell (web link to model)"
- },
- {
- "id": 829,
- "tag": "XML (web link to model)"
- },
- {
- "id": 830,
- "tag": "XPP (web link to model)"
- },
- {
- "id": 1357,
- "tag": "ModelDB:120320"
- }
- ],
- "timestamp_created": "2024-01-11 15:28:54.552335+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/120320",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "887": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 887,
- "name": "Nodose sensory neuron (Schild et al. 1994, Schild and Kunze 1997)",
- "repository_type": "github",
- "summary": "This is a simulink implementation of the model described in Schild et al. 1994, and Schild and Kunze 1997 papers on Nodose sensory neurons. These papers describe the sensitivity these models have to their parameters and the match of the models to experimental data.",
- "tags": [
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 572,
- "tag": "Calcium dynamics"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 721,
- "tag": "I N"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 575,
- "tag": "I T low threshold"
- },
- {
- "id": 767,
- "tag": "MATLAB (web link to model)"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 738,
- "tag": "Na/Ca exchanger"
- },
- {
- "id": 568,
- "tag": "Parameter Fitting"
- },
- {
- "id": 863,
- "tag": "Parameter sensitivity"
- },
- {
- "id": 1358,
- "tag": "ModelDB:120521"
- }
- ],
- "timestamp_created": "2024-01-11 15:28:55.125378+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/120521",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "888": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 888,
- "name": "Sodium potassium ATPase pump (Chapman et al. 1983)",
- "repository_type": "github",
- "summary": "The electrochemical properties of a widely accepted six-step reaction scheme for the Na,K-ATPase have been studied by computer simulation.",
- "tags": [
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 740,
- "tag": "Na/K pump"
- },
- {
- "id": 741,
- "tag": "Sodium pump"
- },
- {
- "id": 1359,
- "tag": "ModelDB:120692"
- }
- ],
- "timestamp_created": "2024-01-11 15:28:55.617271+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/120692",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "889": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 889,
- "name": "Generating oscillatory bursts from a network of regular spiking neurons (Shao et al. 2009)",
- "repository_type": "github",
- "summary": "Avian nucleus isthmi pars parvocellularis (Ipc) neurons are reciprocally connected with the tectal layer 10 (L10) neurons and respond with oscillatory bursts to visual stimulation. To elucidate mechanisms of oscillatory bursting in this network of regularly spiking neurons, we investigated an experimentally constrained model of coupled leaky integrate-and-fire neurons with spike-rate adaptation. The model reproduces the observed Ipc oscillatory bursting in response to simulated visual stimulation.",
- "tags": [
- {
- "id": 566,
- "tag": "Bursting"
- },
- {
- "id": 755,
- "tag": "C or Cplusplus program"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 726,
- "tag": "Vision"
- },
- {
- "id": 1360,
- "tag": "ModelDB:120783"
- }
- ],
- "timestamp_created": "2024-01-11 15:28:56.149647+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/120783",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "890": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 890,
- "name": "Membrane potential changes in dendritic spines during APs and synaptic input (Palmer & Stuart 2009)",
- "repository_type": "github",
- "summary": "\" ...\r\nFinally, we used simulations of our experimental observations in\r\nmorphologically realistic models to estimate spine neck resistance.\r\n\r\nThese simulations indicated that spine neck resistance ranges up\r\nto ~500 M Ohm.\r\n\r\nSpine neck resistances of this magnitude reduce somatic EPSPs by ~15%,\r\nindicating that the spine neck is unlikely to act as a physical device\r\nto significantly modify synaptic strength.\"",
- "tags": [
- {
- "id": 579,
- "tag": "Active Dendrites"
- },
- {
- "id": 570,
- "tag": "Influence of Dendritic Geometry"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 596,
- "tag": "Synaptic Integration"
- },
- {
- "id": 1361,
- "tag": "ModelDB:120798"
- }
- ],
- "timestamp_created": "2024-01-11 15:28:56.665455+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/120798",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "891": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 891,
- "name": "A model of beta-adrenergic modulation of IKs in the guinea-pig ventricle (Severi et al. 2009)",
- "repository_type": "github",
- "summary": "Detailed understanding of IKs gating complexity may provide clues on the mechanisms of cardiac repolarization instability and the resulting arrhythmias. We developed and tested a kinetic Markov model to interpret physiologically relevant IKs properties, including pause-dependency and modulation by beta-adrenergic receptors (beta-AR). The model was developed from the Silva & Rudy formulation. Parameters were optimized on control and ISO experimental data, respectively.",
- "tags": [
- {
- "id": 783,
- "tag": "I_Ks"
- },
- {
- "id": 567,
- "tag": "Ion Channel Kinetics"
- },
- {
- "id": 748,
- "tag": "Markov-type model"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 824,
- "tag": "Simulink"
- },
- {
- "id": 1362,
- "tag": "ModelDB:120835"
- }
- ],
- "timestamp_created": "2024-01-11 15:28:57.139314+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/120835",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "892": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 892,
- "name": "Mechanisms of very fast oscillations in axon networks coupled by gap junctions (Munro, Borgers 2010)",
- "repository_type": "github",
- "summary": "Axons connected by gap junctions can produce very fast oscillations (VFOs, > 80 Hz) when stimulated randomly at a low rate. The models here explore the mechanisms of VFOs that can be seen in an axonal plexus, (Munro & Borgers, 2009): a large network model of an axonal plexus, small network models of axons connected by gap junctions, and an implementation of the model underlying figure 12 in Traub et al. (1999) .\r\n\r\nThe large network model consists of 3,072 5-compartment axons connected in a random network. The 5-compartment axons are the 5 axonal compartments from the CA3 pyramidal cell model in Traub et al. (1994) with a fixed somatic voltage. The random network has the same parameters as the random network in Traub et al. (1999), and axons are stimulated randomly via a Poisson process with a rate of 2/s/axon. \r\n\r\nThe small network models simulate waves propagating through small networks of axons connected by gap junctions to study how local connectivity affects the refractory period.\r\n",
- "tags": [
- {
- "id": 728,
- "tag": "Axonal Action Potentials"
- },
- {
- "id": 755,
- "tag": "C or Cplusplus program"
- },
- {
- "id": 745,
- "tag": "Conduction failure"
- },
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 469,
- "tag": "Epilepsy"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 1363,
- "tag": "ModelDB:120907"
- }
- ],
- "timestamp_created": "2024-01-11 15:28:57.622158+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/120907",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "893": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 893,
- "name": "Electrically-coupled Retzius neurons (Vazquez et al. 2009)",
- "repository_type": "github",
- "summary": "\"Dendritic electrical coupling increases the number of effective synaptic inputs\r\nonto neurons by allowing the direct spread of synaptic potentials from one\r\nneuron to another. \r\n\r\nHere we studied the summation of excitatory postsynaptic potentials (EPSPs) produced \r\nlocally and arriving from the coupled neuron (transjunctional) in pairs of \r\nelectrically-coupled Retzius neurons of the leech.\r\n\r\nWe combined paired recordings of EPSPs, the production of artificial EPSPs\r\n(APSPs) in neuron pairs with different coupling coefficients and simulations of\r\nEPSPs produced in the coupled dendrites. \r\n...\"",
- "tags": [
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 596,
- "tag": "Synaptic Integration"
- },
- {
- "id": 1364,
- "tag": "ModelDB:120910"
- }
- ],
- "timestamp_created": "2024-01-11 15:28:58.183903+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/120910",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "894": {
- "auto_sync": true,
- "content_types": "modeling",
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- "modeling"
- ],
- "default_context": "master",
- "id": 894,
- "name": "Effects of KIR current inactivation in NAc Medium Spiny Neurons (Steephen and Manchanda 2009)",
- "repository_type": "github",
- "summary": "\"Inward rectifying potassium (KIR) currents in medium spiny (MS) neurons of nucleus accumbens inactivate significantly in ~40% of the neurons but not in the rest, which may lead to differences in input processing by these two groups. \r\n\r\nUsing a 189-compartment computational model of the MS neuron, we investigate the influence of this property using injected current as well as spatiotemporally distributed synaptic inputs. \r\n\r\nOur study demonstrates that KIR current inactivation facilitates depolarization, firing frequency and firing onset in these neurons. ...\"",
- "tags": [
- {
- "id": 727,
- "tag": "Action Potential Initiation"
- },
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 754,
- "tag": "Delay"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 730,
- "tag": "I A, slow"
- },
- {
- "id": 731,
- "tag": "I CAN"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 842,
- "tag": "I Krp"
- },
- {
- "id": 589,
- "tag": "I L high threshold"
- },
- {
- "id": 739,
- "tag": "I Na,p"
- },
- {
- "id": 844,
- "tag": "I R"
- },
- {
- "id": 575,
- "tag": "I T low threshold"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 742,
- "tag": "I p,q"
- },
- {
- "id": 567,
- "tag": "Ion Channel Kinetics"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 596,
- "tag": "Synaptic Integration"
- },
- {
- "id": 1365,
- "tag": "ModelDB:121060"
- }
- ],
- "timestamp_created": "2024-01-11 15:28:58.725169+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/121060",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "895": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 895,
- "name": "Submyelin Potassium accumulation in Subthalamic neuron (STN) axons (Bellinger et al. 2008)",
- "repository_type": "github",
- "summary": "\"To better understand the direct effects of DBS (Deep brain stimulation) on central neurons, a computational model of a myelinated axon has been constructed which includes the effects of K+ accumulation within the peri-axonal space.\r\nUsing best estimates of anatomic and electrogenic model parameters for in vivo STN axons, the model predicts a functional block along the axon due to K+ accumulation in the submyelin space.\r\n...\r\nThese results suggest that therapeutic DBS of the STN likely results in a functional block for many STN axons, although a subset of STN axons may also be activated at the stimulating frequency.\r\n\"",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 728,
- "tag": "Axonal Action Potentials"
- },
- {
- "id": 831,
- "tag": "Deep brain stimulation"
- },
- {
- "id": 873,
- "tag": "Depolarization block"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 739,
- "tag": "I Na,p"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 783,
- "tag": "I_Ks"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 740,
- "tag": "Na/K pump"
- },
- {
- "id": 741,
- "tag": "Sodium pump"
- },
- {
- "id": 1366,
- "tag": "ModelDB:121253"
- }
- ],
- "timestamp_created": "2024-01-11 15:28:59.237738+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/121253",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "896": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 896,
- "name": "Small world networks of Type I and Type II Excitable Neurons (Bogaard et al. 2009)",
- "repository_type": "github",
- "summary": "Implemented with NEURON 5.9, four model neurons with varying excitability properties affect the spatiotemporal patterning of small world networks of homogeneous and heterogeneous cell population.",
- "tags": [
- {
- "id": 469,
- "tag": "Epilepsy"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 587,
- "tag": "Spatio-temporal Activity Patterns"
- },
- {
- "id": 586,
- "tag": "Synchronization"
- },
- {
- "id": 1367,
- "tag": "ModelDB:121259"
- }
- ],
- "timestamp_created": "2024-01-11 15:28:59.832010+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/121259",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "897": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 897,
- "name": "Thalamic neuron: Modeling rhythmic neuronal activity (Meuth et al. 2005)",
- "repository_type": "github",
- "summary": "The authors use an in vitro cell model of a single acutely isolated thalamic neuron in the NEURON simulation environment to address and discuss questions in an undergraduate course. Topics covered include passive electrical properties, composition of action potentials, trains of action potentials, multicompartment modeling, and research topics. The paper includes detailed instructions on how to run the simulations in the appendix.",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 566,
- "tag": "Bursting"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 589,
- "tag": "I L high threshold"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 575,
- "tag": "I T low threshold"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 732,
- "tag": "Tutorial/Teaching"
- },
- {
- "id": 1368,
- "tag": "ModelDB:121600"
- }
- ],
- "timestamp_created": "2024-01-11 15:29:00.323418+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/121600",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "898": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 898,
- "name": "Software for teaching neurophysiology of neuronal circuits (Grisham et al. 2008)",
- "repository_type": "github",
- "summary": "\"To circumvent the many problems in teaching neurophysiology as a \u201cwet lab,\u201d we developed SWIMMY, a virtual fish that swims by moving its virtual tail by means of a virtual neural circuit.\r\n...\r\nUsing SWIMMY, students (1) review the basics of neurophysiology, (2) identify the neurons in the circuit, (3) ascertain the neurons\u2019 synaptic interconnections, (4) discover which cells generate the motor pattern of swimming, (5) discover how the rhythm is generated, and finally (6) use an animation that corresponds to the activity of the motoneurons to discover the behavioral effects produced by various lesions and explain them in terms of their neural underpinnings.\r\n...\"",
- "tags": [
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 743,
- "tag": "NEURON (web link to model)"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 732,
- "tag": "Tutorial/Teaching"
- },
- {
- "id": 1369,
- "tag": "ModelDB:121628"
- }
- ],
- "timestamp_created": "2024-01-11 15:29:00.797706+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/121628",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "899": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 899,
- "name": "Model of SK current`s influence on precision in Globus Pallidus Neurons (Deister et al. 2009)",
- "repository_type": "github",
- "summary": "\" ... In numerical simulations, the availability of both Na+ and A-type K+ channels during autonomous firing were reduced when SK channels were removed, and a nearly equal reduction in Na+ and K+ subthreshold-activated ion channel availability produced a large decrease in the neuron's slope conductance near threshold. \r\n\r\nThis change made the neuron more sensitive to intrinsically generated noise.\r\n\r\nIn vivo, this change would also enhance the sensitivity of GP (Globus Pallidus) neurons to small synaptic inputs.\"\r\n",
- "tags": [
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 739,
- "tag": "I Na,p"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 874,
- "tag": "Noise Sensitivity"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 1370,
- "tag": "ModelDB:122329"
- }
- ],
- "timestamp_created": "2024-01-11 15:29:01.289126+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/122329",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "900": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 900,
- "name": "Investigation of different targets in deep brain stimulation for Parkinson`s (Pirini et al. 2009)",
- "repository_type": "github",
- "summary": "\"We investigated by a computational model of the basal ganglia the different network effects of deep brain stimulation (DBS) for Parkinson\u2019s disease (PD) in different target sites in the subthalamic nucleus (STN), the globus pallidus pars interna (GPi), and the globus pallidus pars externa (GPe). \r\n\r\nA cellular-based model of the basal ganglia system (BGS), based on the model proposed by Rubin and Terman (J Comput Neurosci 16:211\u2013235, 2004), was developed.\r\n...\r\nOur results suggest that DBS in the STN could functionally restore the TC relay activity, while DBS in the GPe and in the GPi could functionally over-activate and inhibit it, respectively.\r\n\r\nOur results are consistent with the experimental and the clinical evidences on the network effects of DBS.\"\r\n",
- "tags": [
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 831,
- "tag": "Deep brain stimulation"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 575,
- "tag": "I T low threshold"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 801,
- "tag": "Parkinson's"
- },
- {
- "id": 1371,
- "tag": "ModelDB:122369"
- }
- ],
- "timestamp_created": "2024-01-11 15:29:01.774187+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/122369",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "901": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 901,
- "name": "Tight junction model of CNS myelinated axons (Devaux and Gow 2008)",
- "repository_type": "github",
- "summary": "Two models are included:\r\n1) a myelinated axon is represented by an equivalent circuit with a double cable design but includes a tight junction in parallel with the myelin membrane RC circuit (called double cable model, DCM).\r\n\r\n2) a myelinated axon is represented by an equivalent circuit with a double cable design but includes a tight junction in series with the myelin RC circuit (called tight junction model, TJM).\r\n\r\nThese models have been used to simulate data from compound action potentials measured in mouse optic nerve from Claudin 11-null mice in Fig. 6 of:\r\nDevaux, J.J. & Gow, A. (2008) Tight Junctions Potentiate The Insulative Properties Of Small CNS Myelinated Axons. J Cell Biol 183, 909-921.\r\n",
- "tags": [
- {
- "id": 728,
- "tag": "Axonal Action Potentials"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 591,
- "tag": "I K,leak"
- },
- {
- "id": 580,
- "tag": "I M"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 1372,
- "tag": "ModelDB:122442"
- }
- ],
- "timestamp_created": "2024-01-11 15:29:02.486440+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/122442",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "902": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 902,
- "name": "CONFIGR: a vision-based model for long-range figure completion (Carpenter et al. 2007)",
- "repository_type": "github",
- "summary": "\"CONFIGR (CONtour FIgure GRound) is a computational model based on\r\nprinciples of\r\nbiological vision that completes sparse and noisy image figures.\r\n\r\nWithin an integrated\r\nvision/recognition system, CONFIGR posits an initial recognition\r\nstage which identifies figure\r\npixels from spatially local input information.\r\n\r\nThe resulting, and typically incomplete, figure is\r\nfed back to the \u201cearly vision\u201d stage for long-range completion via\r\nfilling-in.\r\n\r\nThe reconstructed\r\nimage is then re-presented to the recognition system for global\r\nfunctions such as object\r\nrecognition.\r\n\r\n...\r\nMulti-scale simulations illustrate the\r\nvision/recognition system. \r\n\r\n...\"\r\n",
- "tags": [
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 719,
- "tag": "Pattern Recognition"
- },
- {
- "id": 1373,
- "tag": "ModelDB:123086"
- }
- ],
- "timestamp_created": "2024-01-11 15:29:02.965887+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/123086",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "903": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 903,
- "name": "Effect of voltage sensitive fluorescent proteins on neuronal excitability (Akemann et al. 2009)",
- "repository_type": "github",
- "summary": "\"Fluorescent protein voltage sensors are recombinant proteins that are designed as genetically encoded cellular\r\nprobes of membrane potential using mechanisms of voltage-dependent modulation of fluorescence. \r\n\r\nSeveral such proteins,\r\nincluding VSFP2.3 and VSFP3.1, were recently reported with reliable function in mammalian cells. \r\n\r\n...\r\n\r\nExpression of these proteins in cell membranes is accompanied by additional dynamic membrane capacitance, ...\r\n\r\nWe used recordings of\r\nsensing currents and fluorescence responses of VSFP2.3 and of VSFP3.1 to derive kinetic models of the voltage-dependent\r\nsignaling of these proteins. \r\n\r\nUsing computational neuron simulations, we quantitatively investigated the perturbing effects of\r\nsensing capacitance on the input/output relationship in two central neuron models, a cerebellar Purkinje and a layer 5 pyramidal\r\nneuron. \r\n... \". The Purkinje cell model is included in ModelDB.",
- "tags": [
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1374,
- "tag": "ModelDB:123453"
- },
- {
- "id": 577,
- "tag": "NEURON"
- }
- ],
- "timestamp_created": "2024-01-12 09:29:35.908495+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/123453",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "904": {
- "auto_sync": true,
- "content_types": "modeling",
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- "modeling"
- ],
- "default_context": "master",
- "id": 904,
- "name": "Hodgkin-Huxley models of different classes of cortical neurons (Pospischil et al. 2008)",
- "repository_type": "github",
- "summary": "\"We review here the development of Hodgkin-\r\nHuxley (HH) type models of cerebral cortex and thalamic\r\nneurons for network simulations.\r\n\r\nThe intrinsic electrophysiological\r\nproperties of cortical neurons were analyzed from\r\nseveral preparations, and we selected the four most prominent\r\nelectrophysiological classes of neurons.\r\n\r\nThese four classes\r\nare 'fast spiking', 'regular spiking', 'intrinsically bursting'\r\nand 'low-threshold spike' cells. For each class, we fit 'minimal'\r\nHH type models to experimental data.\r\n...\"",
- "tags": [
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 589,
- "tag": "I L high threshold"
- },
- {
- "id": 580,
- "tag": "I M"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 575,
- "tag": "I T low threshold"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1375,
- "tag": "ModelDB:123623"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 568,
- "tag": "Parameter Fitting"
- },
- {
- "id": 569,
- "tag": "Simplified Models"
- }
- ],
- "timestamp_created": "2024-01-12 09:29:36.859223+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/123623",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "905": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 905,
- "name": "Encoding and retrieval in a model of the hippocampal CA1 microcircuit (Cutsuridis et al. 2009)",
- "repository_type": "github",
- "summary": "This NEURON code implements a small network model (100 pyramidal cells\r\nand 4 types of inhibitory interneuron) of storage and recall of patterns\r\nin the CA1 region of the mammalian hippocampus. Patterns of PC activity\r\nare stored either by a predefined weight matrix generated by Hebbian learning,\r\nor by STDP at CA3 Schaffer collateral AMPA synapses.",
- "tags": [
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 855,
- "tag": "Connectivity matrix"
- },
- {
- "id": 825,
- "tag": "Learning"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1376,
- "tag": "ModelDB:123815"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 719,
- "tag": "Pattern Recognition"
- },
- {
- "id": 802,
- "tag": "STDP"
- },
- {
- "id": 1377,
- "tag": "Storage/recall"
- },
- {
- "id": 720,
- "tag": "Temporal Pattern Generation"
- }
- ],
- "timestamp_created": "2024-01-12 09:29:37.477484+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/123815",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "906": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 906,
- "name": "Na channel mutations in the dentate gyrus (Thomas et al. 2009)",
- "repository_type": "github",
- "summary": "These are source files to generate the data in Figure 6 from\r\n\"Mossy fiber sprouting interacts with sodium channel\r\nmutations to increase dentate gyrus excitability\" Thomas EA, Reid CA, Petrou S,\r\nEpilepsia (2009)",
- "tags": [
- {
- "id": 469,
- "tag": "Epilepsy"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 591,
- "tag": "I K,leak"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 567,
- "tag": "Ion Channel Kinetics"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1378,
- "tag": "ModelDB:123848"
- },
- {
- "id": 1379,
- "tag": "parplex"
- }
- ],
- "timestamp_created": "2024-01-12 09:29:38.082016+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/123848",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "907": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 907,
- "name": "Action Potential initiation and backpropagation in Neocortical L5 Pyramidal Neuron (Hu et al. 2009)",
- "repository_type": "github",
- "summary": "\"...Previous computational studies have yielded conflicting conclusions\r\nabout the role of Na+ channel density and biophysical properties in\r\naction potential initiation as a result of inconsistent estimates of\r\nchannel density. Our modeling studies integrated the immunostaining\r\nand electrophysiological results and showed that the lowest\r\nthreshold for action potential initiation at the distal AIS was largely\r\ndetermined by the density of low-threshold Nav1.6 channels ... Distinct from the function of Nav1.6 channel, the Nav1.2 channel\r\nmay control action potential backpropagation because of its high\r\ndensity at the proximal AIS and high threshold. ... In conclusion, distal AIS accumulation of Nav1.6 channels determines\r\nthe low threshold for action potential initiation; whereas\r\nproximal AIS accumulation of Nav1.2 channels sets the threshold for\r\nthe generation of somatodendritic potentials and ensures action\r\npotential backpropagation to the soma and dendrites. Thus, Nav1.6\r\nand Nav1.2 channels serve distinct functions in action potential\r\ninitiation and backpropagation.\"",
- "tags": [
- {
- "id": 727,
- "tag": "Action Potential Initiation"
- },
- {
- "id": 728,
- "tag": "Axonal Action Potentials"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 580,
- "tag": "I M"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 567,
- "tag": "Ion Channel Kinetics"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1380,
- "tag": "ModelDB:123897"
- },
- {
- "id": 577,
- "tag": "NEURON"
- }
- ],
- "timestamp_created": "2024-01-12 09:29:38.679898+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/123897",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "908": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 908,
- "name": "Complex CA1-neuron to study AP initiation (Wimmer et al. 2010)",
- "repository_type": "github",
- "summary": "Complex model of a pyramidal CA1-neuron, adapted from Royeck, M., et al. Role of axonal NaV1.6 sodium channels in action potential\r\ninitiation of CA1 pyramidal neurons. Journal of neurophysiology 100, 2361-2380\r\n(2008).\r\nIt contains a biophysically realistic morphology comprising 265 compartments (829 segments) and 15 different distributed Ca2+- and/or voltage-dependent conductances.",
- "tags": [
- {
- "id": 727,
- "tag": "Action Potential Initiation"
- },
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 469,
- "tag": "Epilepsy"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 591,
- "tag": "I K,leak"
- },
- {
- "id": 589,
- "tag": "I L high threshold"
- },
- {
- "id": 580,
- "tag": "I M"
- },
- {
- "id": 721,
- "tag": "I N"
- },
- {
- "id": 739,
- "tag": "I Na,p"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 575,
- "tag": "I T low threshold"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 742,
- "tag": "I p,q"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1381,
- "tag": "ModelDB:123927"
- },
- {
- "id": 577,
- "tag": "NEURON"
- }
- ],
- "timestamp_created": "2024-01-12 09:29:39.339050+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/123927",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "909": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 909,
- "name": "Oscillations, phase-of-firing coding and STDP: an efficient learning scheme (Masquelier et al. 2009)",
- "repository_type": "github",
- "summary": "The model demonstrates how a common oscillatory drive for a group of neurons formats and reliabilizes their spike times - through an activation-to-phase conversion - so that repeating activation patterns can be easily detected and learned by a downstream neuron equipped with STDP, and then recognized in just one oscillation cycle.",
- "tags": [
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 645,
- "tag": "Brian"
- },
- {
- "id": 595,
- "tag": "Coincidence Detection"
- },
- {
- "id": 749,
- "tag": "Long-term Synaptic Plasticity"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1382,
- "tag": "ModelDB:123928"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 719,
- "tag": "Pattern Recognition"
- },
- {
- "id": 620,
- "tag": "Python"
- },
- {
- "id": 802,
- "tag": "STDP"
- },
- {
- "id": 587,
- "tag": "Spatio-temporal Activity Patterns"
- },
- {
- "id": 725,
- "tag": "Synaptic Plasticity"
- },
- {
- "id": 586,
- "tag": "Synchronization"
- },
- {
- "id": 720,
- "tag": "Temporal Pattern Generation"
- },
- {
- "id": 803,
- "tag": "Unsupervised Learning"
- }
- ],
- "timestamp_created": "2024-01-12 09:29:39.979783+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/123928",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "910": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 910,
- "name": "Oscillation and coding in a proposed NN model of insect olfaction (Horcholle-Bossavit et al. 2007)",
- "repository_type": "github",
- "summary": "\"For the analysis of coding mechanisms in the insect olfactory system, a fully connected network of synchronously updated\r\nMcCulloch and Pitts neurons (MC-P type) was (previously) developed. ... Considering the update time as an intrinsic clock, this \u201cDynamic\r\nNeural Filter\u201d (DNF), which maps regions of input space into spatio-temporal sequences of neuronal activity, is able to produce\r\nexact binary codes extracted from the synchronized activities recorded at the level of projection neurons (PN) in the locust antennal\r\nlobe (AL) in response to different odors\r\n...\r\nWe find synaptic matrices which lead to both the emergence of robust oscillations and spatio-temporal patterns, using a\r\nformal criterion, based on a Normalized Euclidian Distance (NED), in order to measure the use of the temporal dimension as a\r\ncoding dimension by the DNF. Similarly to biological PN, the activity of excitatory neurons in the model can be both phase-locked\r\nto different cycles of oscillations which (is reminiscent of the) local field potential (LFP), and nevertheless exhibit dynamic behavior complex\r\nenough to be the basis of spatio-temporal codes.\"",
- "tags": [
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1383,
- "tag": "ModelDB:123986"
- },
- {
- "id": 588,
- "tag": "Olfaction"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 719,
- "tag": "Pattern Recognition"
- },
- {
- "id": 587,
- "tag": "Spatio-temporal Activity Patterns"
- }
- ],
- "timestamp_created": "2024-01-12 09:29:40.651637+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/123986",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "911": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 911,
- "name": "Neural model of frog ventilatory rhythmogenesis (Horcholle-Bossavit and Quenet 2009)",
- "repository_type": "github",
- "summary": "\"In the adult frog respiratory system, periods of rhythmic movements of the buccal floor are interspersed\r\nby lung ventilation episodes. \r\n\r\nThe ventilatory activity results from the interaction of two hypothesized\r\noscillators in the brainstem. \r\n\r\nHere, we model these oscillators with two coupled neural networks, whose\r\nco-activation results in the emergence of new dynamics. \r\n\r\n..\r\nThe biological interest of this formal model is illustrated by\r\nthe persistence of the relevant dynamical features when perturbations are introduced in the model, i.e.\r\ndynamic noises and architecture modifications. \r\n\r\nThe implementation of the networks with clock-driven\r\ncontinuous time neurones provides simulations with physiological time scales.\"",
- "tags": [
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1384,
- "tag": "ModelDB:123987"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 586,
- "tag": "Synchronization"
- },
- {
- "id": 720,
- "tag": "Temporal Pattern Generation"
- }
- ],
- "timestamp_created": "2024-01-12 09:29:41.256907+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/123987",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "912": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 912,
- "name": "Synaptic integration in tuft dendrites of layer 5 pyramidal neurons (Larkum et al. 2009)",
- "repository_type": "github",
- "summary": "Simulations used in the paper. Voltage responses to current injections in different tuft locations; NMDA and calcium spike generation. Summation of multiple input distribution.",
- "tags": [
- {
- "id": 579,
- "tag": "Active Dendrites"
- },
- {
- "id": 565,
- "tag": "Dendritic Action Potentials"
- },
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 591,
- "tag": "I K,leak"
- },
- {
- "id": 589,
- "tag": "I L high threshold"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 742,
- "tag": "I p,q"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1385,
- "tag": "ModelDB:124043"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 596,
- "tag": "Synaptic Integration"
- }
- ],
- "timestamp_created": "2024-01-12 09:29:41.859499+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/124043",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "913": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 913,
- "name": "A network model of the vertebrate retina (Publio et al. 2009)",
- "repository_type": "github",
- "summary": "In this work, we use a minimal conductance-based model of the ON rod pathways in the vertebrate retina to study the effects of electrical synaptic coupling via gap junctions among rods and among AII amacrine cells on the dynamic range of the retina. The model is also used to study the effects of the maximum conductance of rod hyperpolarization activated current Ih on the dynamic range of the retina, allowing a study of the interrelations between this intrinsic membrane parameter with those two retina connectivity characteristics.",
- "tags": [
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1386,
- "tag": "ModelDB:124063"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 758,
- "tag": "Sensory processing"
- }
- ],
- "timestamp_created": "2024-01-12 09:29:42.484532+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/124063",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- ],
- "default_context": "master",
- "id": 914,
- "name": "A contracting model of the basal ganglia (Girard et al. 2008)",
- "repository_type": "github",
- "summary": "Basal ganglia model : selection processes between channels, dynamics controlled by contraction analysis, rate-coding model of neurons based on locally projected dynamical systems (lPDS).",
- "tags": [
- {
- "id": 771,
- "tag": "Action Selection/Decision Making"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1387,
- "tag": "ModelDB:124111"
- },
- {
- "id": 620,
- "tag": "Python"
- }
- ],
- "timestamp_created": "2024-01-12 09:29:43.045680+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/124111",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "915": {
- "auto_sync": true,
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- ],
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- "id": 915,
- "name": "Dentate Gyrus Feed-forward inhibition (Ferrante et al. 2009)",
- "repository_type": "github",
- "summary": "In this paper, the model was used to show how that FFI can change a steeply sigmoidal input-output (I/O) curve into a double-sigmoid typical of buffer systems.",
- "tags": [
- {
- "id": 727,
- "tag": "Action Potential Initiation"
- },
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 567,
- "tag": "Ion Channel Kinetics"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1388,
- "tag": "ModelDB:124291"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 874,
- "tag": "Noise Sensitivity"
- },
- {
- "id": 587,
- "tag": "Spatio-temporal Activity Patterns"
- },
- {
- "id": 586,
- "tag": "Synchronization"
- }
- ],
- "timestamp_created": "2024-01-12 09:29:43.618473+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/124291",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
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- "modeling"
- ],
- "default_context": "master",
- "id": 916,
- "name": "Alternative time representation in dopamine models (Rivest et al. 2009)",
- "repository_type": "github",
- "summary": "Combines a long short-term memory (LSTM) model of the cortex to a temporal difference learning (TD) model of the basal ganglia. Code to run simulations similar to the published data: Rivest, F, Kalaska, J.F., Bengio, Y. (2009) Alternative time representation in dopamine models. Journal of Computational Neuroscience. \r\nSee http://dx.doi.org/10.1007/s10827-009-0191-1 for details.",
- "tags": [
- {
- "id": 808,
- "tag": "Hebbian plasticity"
- },
- {
- "id": 778,
- "tag": "Java"
- },
- {
- "id": 825,
- "tag": "Learning"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1389,
- "tag": "ModelDB:124329"
- },
- {
- "id": 791,
- "tag": "Rate-coding model neurons"
- },
- {
- "id": 809,
- "tag": "Reinforcement Learning"
- },
- {
- "id": 803,
- "tag": "Unsupervised Learning"
- },
- {
- "id": 794,
- "tag": "Working memory"
- }
- ],
- "timestamp_created": "2024-01-12 09:29:44.208674+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/124329",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
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- "auto_sync": true,
- "content_types": "modeling",
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- "modeling"
- ],
- "default_context": "master",
- "id": 917,
- "name": "Epilepsy may be caused by very small functional changes in ion channels (Thomas et al. 2009)",
- "repository_type": "github",
- "summary": "We used a previously published model of the dentate gyrus with varying degrees of mossy fibre sprouting.We preformed a sensitivity analysis where we systematically varied individual properties of ion channels. The results predict that genetic variations in the properties of sodium channels are likely to have the biggest impact on network excitability. Furthermore, these changes may be as small as 1mV, which is currently undetectable using standard experimental practices.",
- "tags": [
- {
- "id": 469,
- "tag": "Epilepsy"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 591,
- "tag": "I K,leak"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1390,
- "tag": "ModelDB:124392"
- },
- {
- "id": 1379,
- "tag": "parplex"
- }
- ],
- "timestamp_created": "2024-01-12 09:29:44.878959+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/124392",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "918": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 918,
- "name": "Dendritic Na+ spike initiation and backpropagation of APs in active dendrites (Nevian et al. 2007)",
- "repository_type": "github",
- "summary": "NEURON model used to create simulations shown in figure 6 of the paper. The model includes two point processes; one for dendritic spike initiation and the other for somatic action potential generation. The effect of filtering by imperfect recording electrode can be examined in somatic and dendritic locations.",
- "tags": [
- {
- "id": 727,
- "tag": "Action Potential Initiation"
- },
- {
- "id": 579,
- "tag": "Active Dendrites"
- },
- {
- "id": 565,
- "tag": "Dendritic Action Potentials"
- },
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 721,
- "tag": "I N"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1391,
- "tag": "ModelDB:124394"
- },
- {
- "id": 577,
- "tag": "NEURON"
- }
- ],
- "timestamp_created": "2024-01-12 09:29:45.455141+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/124394",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "919": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 919,
- "name": "Dentate gyrus (Morgan et al. 2007, 2008, Santhakumar et al. 2005, Dyhrfjeld-Johnsen et al. 2007)",
- "repository_type": "github",
- "summary": "This model was implemented by Rob Morgan in the Soltesz lab at UC Irvine. It is a scaleable model of the rat dentate gyrus including four cell types. This model runs in serial (on a single processor) and has been published at the size of 50,000 granule cells (with proportional numbers of the other cells).",
- "tags": [
- {
- "id": 469,
- "tag": "Epilepsy"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1392,
- "tag": "ModelDB:124513"
- },
- {
- "id": 577,
- "tag": "NEURON"
- }
- ],
- "timestamp_created": "2024-01-12 09:29:46.047816+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/124513",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "920": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 920,
- "name": "Reduced leech heart interneuron (Channell et al. 2009)",
- "repository_type": "github",
- "summary": "\"Spiking and bursting patterns of neurons are characterized by a high degree of variability.\r\n\r\nA single neuron can demonstrate endogenously various bursting patterns, changing in response to external disturbances\r\ndue to synapses, or to intrinsic factors such as channel noise.\r\n\r\nWe argue that in a model of the leech heart interneuron existing variations of bursting patterns are\r\nsignificantly enhanced by a small noise.\r\n\r\nIn the absence of noise this model shows periodic bursting with fixed\r\nnumbers of interspikes for most parameter values. ...\"\r\n",
- "tags": [
- {
- "id": 1393,
- "tag": "CONTENT"
- },
- {
- "id": 1394,
- "tag": "Dynamics Solver"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1395,
- "tag": "ModelDB:125125"
- }
- ],
- "timestamp_created": "2024-01-12 09:29:46.669145+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/125125",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "921": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 921,
- "name": "CA1 pyramidal neuron to study INaP properties and repetitive firing (Uebachs et al. 2010)",
- "repository_type": "github",
- "summary": "A model of a CA1 pyramidal neuron containing a biophysically realistic morphology and 15 distributed voltage and Ca2+-dependent conductances. Repetitive firing is modulated by maximal conductance and the\r\nvoltage dependence of the persistent Na+ current (INaP).",
- "tags": [
- {
- "id": 795,
- "tag": "ATP-senstive potassium current"
- },
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 469,
- "tag": "Epilepsy"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 731,
- "tag": "I CAN"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 591,
- "tag": "I K,leak"
- },
- {
- "id": 580,
- "tag": "I M"
- },
- {
- "id": 739,
- "tag": "I Na,p"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 742,
- "tag": "I p,q"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1396,
- "tag": "ModelDB:125152"
- },
- {
- "id": 577,
- "tag": "NEURON"
- }
- ],
- "timestamp_created": "2024-01-12 09:29:47.299437+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/125152",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "922": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 922,
- "name": "Simulation studies on mechanisms of levetiracetam-mediated inhibition of IK(DR) (Huang et al. 2009)",
- "repository_type": "github",
- "summary": "Levetiracetam (LEV) is an S-enantiomer pyrrolidone derivative with established antiepileptic \r\nefficacy in generalized epilepsy and partial epilepsy. However, its effects on ion currents \r\nand membrane potential remain largely unclear. In this study, we investigated the effect of \r\nLEV on differentiated NG108-15 neurons. \r\n...\r\nSimulation studies in a modified \r\nHodgkin-Huxley neuron and network unraveled that the reduction of slowly inactivating IK(DR) resulted \r\nin membrane depolarization accompanied by termination of the firing of action potentials in a \r\nstochastic manner. Therefore, the inhibitory effects on slowly inactivating IK(DR) (Kv3.1-encoded \r\ncurrent) may constitute one of the underlying mechanisms through which LEV affects neuronal activity \r\nin vivo.",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 769,
- "tag": "I_KHT"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1397,
- "tag": "ModelDB:125154"
- },
- {
- "id": 759,
- "tag": "XPPAUT"
- }
- ],
- "timestamp_created": "2024-01-12 09:29:47.881500+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/125154",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "923": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 923,
- "name": "Maximum entropy model to predict spatiotemporal spike patterns (Marre et al. 2009)",
- "repository_type": "github",
- "summary": "This MATLAB code implements a model-based analysis of spike trains.\r\nThe analysis predicts the occurrence of spatio-temporal patterns of\r\nspikes in the data, and is based on a maximum entropy principle by\r\nincluding both spatial and temporal correlations. The approach is\r\napplicable to unit recordings from any region of the brain.\r\n\r\nThe code is based on Marre, et al., 2009.\r\n\r\nThe MATLAB code was written by Sami El Boustani and Olivier Marre.\r\n",
- "tags": [
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 1398,
- "tag": "Maximum entropy models"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1399,
- "tag": "ModelDB:125290"
- }
- ],
- "timestamp_created": "2024-01-12 09:29:48.453727+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/125290",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "924": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 924,
- "name": "Availability of low-threshold Ca2+ current in retinal ganglion cells (Lee SC et al. 2003)",
- "repository_type": "github",
- "summary": "\"... we measured T-type current of isolated\r\ngoldfish retinal ganglion cells with perforated-patch voltageclamp\r\nmethods in solutions containing a normal extracellular Ca2+\r\nconcentration.\r\n\r\nThe voltage sensitivities and rates of current activation,\r\ninactivation, deactivation, and recovery from inactivation were similar\r\nto those of expressed +1G (CaV3.1) Ca2+ channel clones, except that\r\nthe rate of deactivation was significantly faster.\r\n\r\nWe reproduced the\r\namplitude and kinetics of measured T currents with a numerical\r\nsimulation based on a kinetic model developed for an +1G Ca2+\r\nchannel.\r\n\r\nFinally, we show that this model predicts the increase of\r\nT-type current made available between resting potential and spike\r\nthreshold by repetitive hyperpolarizations presented at rates that are\r\nwithin the bandwidth of signals processed in situ by these neurons.\"",
- "tags": [
- {
- "id": 575,
- "tag": "I T low threshold"
- },
- {
- "id": 567,
- "tag": "Ion Channel Kinetics"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1400,
- "tag": "ModelDB:125378"
- },
- {
- "id": 577,
- "tag": "NEURON"
- }
- ],
- "timestamp_created": "2024-01-12 09:29:49.036874+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/125378",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "925": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 925,
- "name": "Spike propagation in dendrites with stochastic ion channels (Diba et al. 2006)",
- "repository_type": "github",
- "summary": "\"We investigate the effects of the stochastic nature\r\nof ion channels on the faithfulness, precision and reproducibility\r\nof electrical signal transmission in weakly active,\r\ndendritic membrane under in vitro conditions. \r\n\r\n...\r\n\r\nWe numerically simulate the effects of stochastic ion\r\nchannels on the forward and backward propagation of dendritic\r\nspikes in Monte-Carlo simulations on a reconstructed\r\nlayer 5 pyramidal neuron. \r\n\r\nWe report that in most instances\r\nthere is little variation in timing or amplitude for a single\r\nBPAP, while variable backpropagation can occur for trains\r\nof action potentials. \r\n\r\nAdditionally, we find that the generation\r\nand forward propagation of dendritic Ca2+ spikes are\r\nsusceptible to channel variability. This indicates limitations\r\non computations that depend on the precise timing of Ca2+\r\nspikes.\"",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 579,
- "tag": "Active Dendrites"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1401,
- "tag": "ModelDB:125385"
- },
- {
- "id": 577,
- "tag": "NEURON"
- }
- ],
- "timestamp_created": "2024-01-12 09:29:49.621160+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/125385",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "926": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 926,
- "name": "Respiratory central pattern generator network in mammalian brainstem (Rubin et al. 2009)",
- "repository_type": "github",
- "summary": "This model is a reduced version of a spatially organized respiratory central pattern generation network consisting of four neuronal populations (pre-I, early-I, post-I, and aug-E). In this reduction, each population is represented by a single neuron, in an activity-based framework (which includes the persistent sodium current for the pre-I population). The model includes three sources of external drive and can produce several experimentally observed rhythms.",
- "tags": [
- {
- "id": 739,
- "tag": "I Na,p"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1402,
- "tag": "ModelDB:125529"
- },
- {
- "id": 720,
- "tag": "Temporal Pattern Generation"
- },
- {
- "id": 759,
- "tag": "XPPAUT"
- }
- ],
- "timestamp_created": "2024-01-12 09:29:50.226884+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/125529",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "927": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 927,
- "name": "Ca2+-activated I_CAN and synaptic depression promotes network-dependent oscil. (Rubin et al. 2009)",
- "repository_type": "github",
- "summary": "\"... the preBotzinger complex...\r\nwe present and analyze a\r\nmathematical model demonstrating an unconventional mechanism\r\nof rhythm generation in which glutamatergic synapses and the\r\nshort-term depression of excitatory transmission play key rhythmogenic\r\nroles. \r\n\r\nRecurrent synaptic excitation triggers postsynaptic Ca2+-\r\nactivated nonspecific cation current (ICAN) to initiate a network-wide\r\nburst. \r\n\r\nRobust depolarization due to ICAN also causes voltage-dependent\r\nspike inactivation, which diminishes recurrent excitation and\r\nthus attenuates postsynaptic Ca2+ accumulation. \r\n...\"",
- "tags": [
- {
- "id": 566,
- "tag": "Bursting"
- },
- {
- "id": 776,
- "tag": "C or Cplusplus program (web link to model)"
- },
- {
- "id": 731,
- "tag": "I CAN"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1403,
- "tag": "ModelDB:125649"
- },
- {
- "id": 1404,
- "tag": "NeuronetExperimenter (web link to model)"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 830,
- "tag": "XPP (web link to model)"
- }
- ],
- "timestamp_created": "2024-01-12 09:29:50.872412+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/125649",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "928": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 928,
- "name": "Ca2+ current versus Ca2+ channel cooperativity of exocytosis (Matveev et al. 2009)",
- "repository_type": "github",
- "summary": "\"... While varying extracellular or intracellular Ca2+ concentration assesses the intrinsic biochemical Ca2+ cooperativity of \r\nneurotransmitter release, varying the number of open Ca2+ channels using pharmacological channel block or the tail current \r\ntitration probes the cooperativity between individual Ca2+ channels in triggering exocytosis. \r\n...\r\n\r\nHere we provide a detailed analysis of the Ca2+ sensitivity measures probed by these experimental\r\nprotocols, present simple expressions for special cases, and demonstrate the distinction between the Ca2+ current cooperativity, defined\r\nby the relationship between exocytosis rate and the whole-terminal Ca2+ current magnitude, and the underlying Ca2+ channel cooperativity,\r\ndefined as the average number of channels involved in the release of a single vesicle. \r\n...\r\nFurther, we use three-dimensional computational modeling of buffered Ca2+\r\ndiffusion to analyze these distinct Ca2+ cooperativity measures, and demonstrate the role of endogenous Ca2+ buffers on such measures.\r\n\r\nWe show that buffers can either increase or decrease the Ca2+ current cooperativity of exocytosis, depending on their concentration and\r\nthe single-channel Ca2+ current.\"",
- "tags": [
- {
- "id": 869,
- "tag": "CalC Calcium Calculator (web link to model)"
- },
- {
- "id": 572,
- "tag": "Calcium dynamics"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1405,
- "tag": "ModelDB:125676"
- }
- ],
- "timestamp_created": "2024-01-12 09:29:51.443014+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/125676",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "929": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 929,
- "name": "Deterministic chaos in a mathematical model of a snail neuron (Komendantov and Kononenko 1996)",
- "repository_type": "github",
- "summary": "\"Chaotic regimes in a mathematical model of pacemaker activity in the bursting neurons of a snail Helix pomatia, have been investigated.\r\n\r\nThe model includes a slow-wave generating mechanism, a spike-generating mechanism, an inward Ca current, intracellular Ca ions, [Ca2+]in, their fast buffering and uptake by intracellular Ca stores, and a [Ca2+]in-inhibited Ca current.\r\n\r\nChemosensitive voltage-activated conductance, gB*, responsible for termination of the spike burst, and chemosensitive sodium conductance, gNa*, responsible for the depolarization phase of the slow-wave, were used as control parameters.\r\n...\r\nTime courses of the membrane potential and [Ca2+]in were employed to analyse different regimes in the model. \r\n...\"",
- "tags": [
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 566,
- "tag": "Bursting"
- },
- {
- "id": 572,
- "tag": "Calcium dynamics"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 729,
- "tag": "Invertebrate"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1406,
- "tag": "ModelDB:125683"
- },
- {
- "id": 759,
- "tag": "XPPAUT"
- }
- ],
- "timestamp_created": "2024-01-12 09:29:52.013657+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/125683",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "930": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 930,
- "name": "Balance of excitation and inhibition (Carvalho and Buonomano 2009)",
- "repository_type": "github",
- "summary": "\" ... \r\nHere, theoretical analyses reveal that excitatory synaptic\r\nstrength controls the threshold of the neuronal\r\ninput-output function, while inhibitory plasticity\r\nalters the threshold and gain.\r\n\r\nExperimentally, changes in the balance of excitation and inhibition\r\nin CA1 pyramidal neurons also altered their input-output\r\nfunction as predicted by the model.\r\n\r\nThese results support the existence of two functional\r\nmodes of plasticity that can be used to optimize\r\ninformation processing: threshold and gain plasticity.\"",
- "tags": [
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1407,
- "tag": "ModelDB:125689"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 596,
- "tag": "Synaptic Integration"
- }
- ],
- "timestamp_created": "2024-01-12 09:29:52.617091+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/125689",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "931": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 931,
- "name": "Hippocampus CA1: Temporal sensitivity of signaling pathways underlying LTP (Kim et al. 2010)",
- "repository_type": "github",
- "summary": "Temporal sensitivity of signaling pathways underlying L-LTP. Single compartment, deterministic model of calcium and dopamine activated pathways, leading to CaMKII and PKA activation. Experimental verification of model prediction.",
- "tags": [
- {
- "id": 749,
- "tag": "Long-term Synaptic Plasticity"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1408,
- "tag": "ModelDB:125733"
- },
- {
- "id": 751,
- "tag": "Signaling pathways"
- },
- {
- "id": 759,
- "tag": "XPPAUT"
- }
- ],
- "timestamp_created": "2024-01-12 09:29:53.313541+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/125733",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "932": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 932,
- "name": "Calcium waves in neuroblastoma cells (Fink et al. 2000)",
- "repository_type": "github",
- "summary": "Uses a model of IP3-mediated release of Ca from endoplasmic reticulum (ER) to study how initiation and propagation of Ca waves are affected by cell geometry, spatial distributions of ER and IP3 generation, and diffusion of Ca and mobile buffer.\r\n",
- "tags": [
- {
- "id": 572,
- "tag": "Calcium dynamics"
- },
- {
- "id": 790,
- "tag": "Calcium waves"
- },
- {
- "id": 818,
- "tag": "I_SERCA"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1409,
- "tag": "ModelDB:125745"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 782,
- "tag": "Virtual Cell (web link to model)"
- }
- ],
- "timestamp_created": "2024-01-12 09:29:54.003382+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/125745",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "933": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 933,
- "name": "Huntington`s disease model (Gambazzi et al. 2010)",
- "repository_type": "github",
- "summary": "\"Although previous studies of Huntington\u2019s disease (HD) have addressed many potential mechanisms of striatal neuron dysfunction and death, it is also known based on clinical findings that cortical function is dramatically disrupted in HD. With respect to disease etiology, however, the specific molecular and neuronal circuit bases for the cortical effects of mutant huntingtin (htt) have remained largely unknown. \r\n\r\nIn the present work we studied the relation between the molecular effects of mutant htt fragments in cortical cells and the corresponding behavior of cortical neuron microcircuits using a novel cellular model of HD. We observed that a transcript-selective diminution in activity-dependent BDNF expression preceded the onset of a synaptic connectivity deficit in ex vivo cortical networks, which manifested as decreased spontaneous collective burst-firing behavior measured by multi-electrode array substrates. Decreased BDNF expression was determined to be a significant contributor to network-level dysfunction, as shown by the ability of exogenous BDNF to ameliorate cortical microcircuit burst firing. \r\n\r\nThe molecular determinants of the dysregulation of activity-dependent BDNF expression by mutant htt appear to be distinct from previously elucidated mechanisms, as they do not involve known NRSF/REST-regulated promoter sequences, but instead result from dysregulation of BDNF exon IV and VI transcription. These data elucidate a novel HD-related deficit in BDNF gene regulation as a plausible mechanism of cortical neuron hypoconnectivity and cortical function deficits in HD. Moreover, the novel model paradigm established here is well-suited to further mechanistic and drug screening research applications.\r\n\r\nA simple mathematical model is proposed to interpret the observations and to explore the impact of specific synaptic dysfunctions on network activity. Interestingly, the model predicts a decrease in synaptic connectivity to be an early effect of mutant huntingtin in cortical neurons, supporting the hypothesis of decreased, rather than increased, synchronized cortical firing in HD.\"",
- "tags": [
- {
- "id": 755,
- "tag": "C or Cplusplus program"
- },
- {
- "id": 1410,
- "tag": "Huntington's"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1411,
- "tag": "ModelDB:125748"
- },
- {
- "id": 787,
- "tag": "Pathophysiology"
- }
- ],
- "timestamp_created": "2024-01-12 09:29:54.581683+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/125748",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "934": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 934,
- "name": "Long-term adaptation with power-law dynamics (Zilany et al. 2009)",
- "repository_type": "github",
- "summary": "...\r\nA model of rate adaptation at the synapse between inner hair cells and auditory-nerve\r\n(AN) fibers that includes both exponential and power-law dynamics is presented here.\r\n\r\nExponentially\r\nadapting components with rapid and short-term time constants, which are mainly responsible for\r\nshaping onset responses, are followed by two parallel paths with power-law adaptation that provide\r\nslowly and rapidly adapting responses.\r\n\r\n...\r\nThe proposed model is capable of accurately predicting several sets of AN data,\r\nincluding amplitude-modulation transfer functions, long-term adaptation, forward masking, and\r\nadaptation to increments and decrements in the amplitude of an ongoing stimulus.",
- "tags": [
- {
- "id": 762,
- "tag": "Audition"
- },
- {
- "id": 776,
- "tag": "C or Cplusplus program (web link to model)"
- },
- {
- "id": 767,
- "tag": "MATLAB (web link to model)"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1412,
- "tag": "ModelDB:125855"
- }
- ],
- "timestamp_created": "2024-01-12 09:29:55.144992+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/125855",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "935": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 935,
- "name": "A Fast Rhythmic Bursting Cell: in vivo cell modeling (Lee 2007)",
- "repository_type": "github",
- "summary": "One of the cellular mechanisms underlying the generation of gamma oscillations is a type of cortical pyramidal neuron named fast rhythmic bursting (FRB) cells. After cells from cats' primary visual cortices were filled with Neurobiotin, the brains were cut, and the cells were photographed. One FRB cell was chosen to be confocaled, reconstructed with Neurolucida software, and generated a detailed multi-compartmental model in the NEURON program. We explore firing properties of FRB cells and the role of enhanced Na+ conductance.",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 566,
- "tag": "Bursting"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 739,
- "tag": "I Na,p"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 861,
- "tag": "I_K,Na"
- },
- {
- "id": 817,
- "tag": "I_Na,Ca"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1413,
- "tag": "ModelDB:125857"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 587,
- "tag": "Spatio-temporal Activity Patterns"
- },
- {
- "id": 726,
- "tag": "Vision"
- }
- ],
- "timestamp_created": "2024-01-12 09:29:55.770826+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/125857",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "936": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 936,
- "name": "Integrate and fire model code for spike-based coincidence-detection (Heinz et al. 2001, others)",
- "repository_type": "github",
- "summary": "Model code relevant to three papers; two on level discrimination and one on masked detection at low frequencies.",
- "tags": [
- {
- "id": 762,
- "tag": "Audition"
- },
- {
- "id": 776,
- "tag": "C or Cplusplus program (web link to model)"
- },
- {
- "id": 595,
- "tag": "Coincidence Detection"
- },
- {
- "id": 767,
- "tag": "MATLAB (web link to model)"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1414,
- "tag": "ModelDB:126052"
- },
- {
- "id": 569,
- "tag": "Simplified Models"
- }
- ],
- "timestamp_created": "2024-01-12 09:29:56.340535+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/126052",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "937": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 937,
- "name": "Model of neural responses to amplitude-modulated tones (Nelson and Carney 2004)",
- "repository_type": "github",
- "summary": "\"A phenomenological model with time-varying excitation and inhibition was developed to study\r\npossible neural mechanisms underlying changes in the representation of temporal envelopes along\r\nthe auditory pathway. A modified version of an existing auditory-nerve model (Zhang et al., J.\r\nAcoust. Soc. Am. 109, 648\u2013670 (2001) was used to provide inputs to higher hypothetical\r\nprocessing centers. \r\n\r\nModel responses were compared directly to published physiological data at three\r\nlevels: the auditory nerve, ventral cochlear nucleus, and inferior colliculus.\r\n...\"",
- "tags": [
- {
- "id": 762,
- "tag": "Audition"
- },
- {
- "id": 776,
- "tag": "C or Cplusplus program (web link to model)"
- },
- {
- "id": 767,
- "tag": "MATLAB (web link to model)"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1415,
- "tag": "ModelDB:126096"
- },
- {
- "id": 586,
- "tag": "Synchronization"
- }
- ],
- "timestamp_created": "2024-01-12 09:29:56.917791+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/126096",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "938": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 938,
- "name": "A kinetic model of dopamine- and calcium-dependent striatal synaptic plasticity (Nakano et al. 2010)",
- "repository_type": "github",
- "summary": "A signaling pathway model of spines that express D1-type dopamine receptors was constructed to analyze the dynamic mechanisms of dopamine- and calcium-dependent plasticity. \r\n\r\nThe model incorporated all major signaling molecules, including dopamine- and cyclic AMP-regulated phosphoprotein with a molecular weight of 32 kDa (DARPP32), as well as AMPA receptor trafficking in the post-synaptic membrane. Simulations with dopamine and calcium inputs reproduced dopamine- and calcium-dependent plasticity. \r\n\r\nFurther in silico experiments revealed that the positive feedback loop consisted of protein kinase A (PKA), protein phosphatase 2A (PP2A), and the phosphorylation site at threonine 75 of DARPP-32 (Thr75) served as the major switch for inducing LTD and LTP. \r\n\r\nThe present model elucidated the mechanisms involved in bidirectional regulation of corticostriatal synapses and will allow for further exploration into causes and therapies for dysfunctions such as drug addiction.\"",
- "tags": [
- {
- "id": 600,
- "tag": "GENESIS"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1416,
- "tag": "ModelDB:126098"
- },
- {
- "id": 751,
- "tag": "Signaling pathways"
- }
- ],
- "timestamp_created": "2024-01-12 09:29:57.470876+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/126098",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "939": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 939,
- "name": "Encoding and discrimination of vowel-like sounds (Tan and Carney 2005)",
- "repository_type": "github",
- "summary": "\"The sensitivity of listeners to changes in the center frequency of vowel-like harmonic complexes as\r\na function of the center frequency of the complex cannot be explained by changes in the level of the\r\nstimulus [Lyzenga and Horst, J. Acoust. Soc. Am. 98, 1943\u20131955 (1995)]. \r\n\r\nRather, a complex pattern\r\nof sensitivity is seen; for a spectrum with a triangular envelope, the greatest sensitivity occurs when\r\nthe center frequency falls between harmonics, whereas for a spectrum with a trapezoidal envelope,\r\ngreatest sensitivity occurs when the center frequency is aligned with a harmonic.\r\n\r\nIn this study, the\r\nthresholds of a population model of auditory-nerve (AN) fibers were quantitatively compared to\r\nthese trends in psychophysical thresholds.\r\n\r\nSingle-fiber and population model responses were\r\nevaluated in terms of both average discharge rate and the combination of rate and timing\r\ninformation.\r\n...\"",
- "tags": [
- {
- "id": 762,
- "tag": "Audition"
- },
- {
- "id": 776,
- "tag": "C or Cplusplus program (web link to model)"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1417,
- "tag": "ModelDB:126371"
- },
- {
- "id": 720,
- "tag": "Temporal Pattern Generation"
- }
- ],
- "timestamp_created": "2024-01-12 09:29:58.042759+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/126371",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "940": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 940,
- "name": "Auditory nerve spontaneous rate histograms (Jackson and Carney 2005)",
- "repository_type": "github",
- "summary": "Histograms of spontaneous rate estimates of auditory nerve are well reproduced by models with two or three spontaneous rates and long range dependence.",
- "tags": [
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 762,
- "tag": "Audition"
- },
- {
- "id": 776,
- "tag": "C or Cplusplus program (web link to model)"
- },
- {
- "id": 767,
- "tag": "MATLAB (web link to model)"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1418,
- "tag": "ModelDB:126389"
- }
- ],
- "timestamp_created": "2024-01-12 09:29:58.606050+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/126389",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "941": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 941,
- "name": "Response properties of an integrate and fire model (Zhang and Carney 2005)",
- "repository_type": "github",
- "summary": "\"A computational technique is described for calculation of the interspike interval and poststimulus time histograms for the responses of an\r\nintegrate-and-fire model to arbitrary inputs.\r\n...\r\nFor stationary inputs, the regularity of the output was studied in detail for various model parameters.\r\n\r\nFor nonstationary inputs, the effects of the model parameters on the output synchronization index were explored.\r\n\r\n... these response properties have been reported for some cells in the ventral cochlear nucleus in the auditory brainstem.\r\n\"",
- "tags": [
- {
- "id": 762,
- "tag": "Audition"
- },
- {
- "id": 776,
- "tag": "C or Cplusplus program (web link to model)"
- },
- {
- "id": 767,
- "tag": "MATLAB (web link to model)"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1419,
- "tag": "ModelDB:126392"
- }
- ],
- "timestamp_created": "2024-01-12 09:29:59.227288+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/126392",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "942": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 942,
- "name": "Spike-Timing-Based Computation in Sound Localization (Goodman and Brette 2010)",
- "repository_type": "github",
- "summary": "\" ...\r\nIn neuron models consisting of spectro-temporal filtering and spiking\r\nnonlinearity, we found that the binaural structure induced by spatialized sounds is mapped to synchrony patterns that\r\ndepend on source location rather than on source signal. \r\n\r\nLocation-specific synchrony patterns would then result in the\r\nactivation of location-specific assemblies of postsynaptic neurons. \r\n\r\nWe designed a spiking neuron model which exploited\r\nthis principle to locate a variety of sound sources in a virtual acoustic environment using measured human head-related\r\ntransfer functions.\r\n...\"",
- "tags": [
- {
- "id": 645,
- "tag": "Brian"
- },
- {
- "id": 595,
- "tag": "Coincidence Detection"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1420,
- "tag": "ModelDB:126465"
- },
- {
- "id": 620,
- "tag": "Python"
- },
- {
- "id": 586,
- "tag": "Synchronization"
- }
- ],
- "timestamp_created": "2024-01-12 09:29:59.822268+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/126465",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "943": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 943,
- "name": "Asynchronous irregular and up/down states in excitatory and inhibitory NNs (Destexhe 2009)",
- "repository_type": "github",
- "summary": "\"Randomly-connected networks of integrate-and-fire (IF) neurons are known to display asynchronous irregular (AI) activity states, which resemble the discharge activity recorded in the cerebral cortex of awake animals. \r\n\r\n...\r\nHere, we investigate the occurrence of AI states in networks of nonlinear IF neurons, such as the adaptive exponential IF (Brette-Gerstner-Izhikevich) model. This model can display intrinsic properties such as low-threshold spike (LTS), regular spiking (RS) or fast-spiking (FS). We successively investigate the oscillatory and AI dynamics of thalamic, cortical and thalamocortical networks using such models.\r\n...\"",
- "tags": [
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1421,
- "tag": "ModelDB:126466"
- },
- {
- "id": 714,
- "tag": "PyNN"
- },
- {
- "id": 587,
- "tag": "Spatio-temporal Activity Patterns"
- }
- ],
- "timestamp_created": "2024-01-12 09:30:00.410372+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/126466",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "944": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 944,
- "name": "Cardiac sarcomere dynamics (Negroni and Lascano 1996)",
- "repository_type": "github",
- "summary": "\"A muscle model establishing the link between cross-bridge dynamics and intracellular Ca2+ kinetics was assessed by simulation of experiments performed in isolated cardiac muscle.\r\n\r\nThe model is composed by the series arrangement of muscle units formed by inextensible thick and thin filaments in parallel with an elastic element.\r\n\r\nAttached cross-bridges act as independent force generators whose force is linearly related to the elongation of their elastic structure.\r\n\r\nCa2+ kinetics is described by a four-state system of sites on the thin filament associated with troponin C: sites with free troponin C (T), sites with Ca2+ bound to troponin C (TCa); sites with Ca2+ bound to troponin C and attached cross-bridges (TCa*); and sites with troponin C not associated with Ca2+ and attached cross-bridges (T*).\r\n\r\nThe intracellular Ca2+ concentration ([Ca2+]) is controlled solely by the sarcoplasmic reticulum through an inflow function and a saturated outflow pump function.\r\n...\"",
- "tags": [
- {
- "id": 572,
- "tag": "Calcium dynamics"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1422,
- "tag": "ModelDB:126467"
- },
- {
- "id": 577,
- "tag": "NEURON"
- }
- ],
- "timestamp_created": "2024-01-12 09:30:00.973351+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/126467",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "945": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 945,
- "name": "Formation of synfire chains (Jun and Jin 2007)",
- "repository_type": "github",
- "summary": "\"Temporally precise sequences of neuronal spikes that span hundreds of milliseconds are observed in many brain areas,\r\nincluding songbird premotor nucleus, cat visual cortex, and primary motor cortex.\r\n\r\nSynfire chains\u2014networks in which groups of\r\nneurons are connected via excitatory synapses into a unidirectional chain\u2014are thought to underlie the generation of such\r\nsequences. \r\n\r\nIt is unknown, however, how synfire chains can form in local neural circuits, especially for long chains. \r\n\r\nHere, we\r\nshow through computer simulation that long synfire chains can develop through spike-time dependent synaptic plasticity and\r\naxon remodeling\u2014the pruning of prolific weak connections that follows the emergence of a finite number of strong\r\nconnections. \r\n...\"",
- "tags": [
- {
- "id": 755,
- "tag": "C or Cplusplus program"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1423,
- "tag": "ModelDB:126471"
- },
- {
- "id": 802,
- "tag": "STDP"
- },
- {
- "id": 587,
- "tag": "Spatio-temporal Activity Patterns"
- },
- {
- "id": 720,
- "tag": "Temporal Pattern Generation"
- },
- {
- "id": 726,
- "tag": "Vision"
- }
- ],
- "timestamp_created": "2024-01-12 09:30:01.532020+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/126471",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "946": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 946,
- "name": "Models analysis for auditory-nerve synapse (Zhang and Carney 2005)",
- "repository_type": "github",
- "summary": "\"A general mathematical approach was proposed to study phenomenological models of the\r\ninner-hair-cell and auditory-nerve (AN) synapse complex. Two models (Meddis, 1986; Westerman\r\nand Smith, 1988) were studied using this unified approach. The responses of both models to a\r\nconstant-intensity stimulus were described mathematically, and the relationship between model\r\nparameters and response characteristics was investigated. ...\". The paper then modifies these\r\nto make a more physiologically realistic model.\r\n",
- "tags": [
- {
- "id": 762,
- "tag": "Audition"
- },
- {
- "id": 767,
- "tag": "MATLAB (web link to model)"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1424,
- "tag": "ModelDB:126489"
- }
- ],
- "timestamp_created": "2024-01-12 09:30:02.113583+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/126489",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "947": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 947,
- "name": "Predicting formant-frequency discrimination in noise (Tan and Carney 2006)",
- "repository_type": "github",
- "summary": "\"To better understand how the auditory system extracts speech signals in the presence of noise,\r\ndiscrimination thresholds for the second formant frequency were predicted with simulations of\r\nauditory-nerve responses.\r\n\r\nThese predictions employed either average-rate information or combined\r\nrate and timing information, and either populations of model fibers tuned across a wide range of\r\nfrequencies or a subset of fibers tuned to a restricted frequency range.\r\n\r\nIn general, combined temporal\r\nand rate information for a small population of model fibers tuned near the formant frequency was\r\nmost successful in replicating the trends reported in behavioral data for formant-frequency\r\ndiscrimination. ...\"",
- "tags": [
- {
- "id": 762,
- "tag": "Audition"
- },
- {
- "id": 776,
- "tag": "C or Cplusplus program (web link to model)"
- },
- {
- "id": 595,
- "tag": "Coincidence Detection"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1425,
- "tag": "ModelDB:126598"
- }
- ],
- "timestamp_created": "2024-01-12 09:30:02.849069+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/126598",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "948": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 948,
- "name": "Models for diotic and dichotic detection (Davidson et al. 2009)",
- "repository_type": "github",
- "summary": "Several psychophysical models for masked detection were evaluated using reproducible noises.\r\n\r\nThe data were hit and false-alarm rates from three psychophysical studies of detection of 500-Hz tones\r\nin reproducible noise under diotic (N0S0) and dichotic (N0Spi) conditions with four stimulus\r\nbandwidths (50, 100, 115, and 2900 Hz).\r\n\r\nDiotic data were best predicted by an energy-based multiple-detector model that linearly combined stimulus energies at the outputs of several\r\ncritical-band filters.\r\n\r\nThe tone-plus-noise trials in the dichotic data were best predicted by models that\r\nlinearly combined either the average values or the standard deviations of interaural time and level\r\ndifferences; however, these models offered no predictions for noise-alone responses.\r\n\r\n...\". The Breebart et al. 2001 and the Dau et al. 1996 models are supplied at the Carney lab web site.",
- "tags": [
- {
- "id": 762,
- "tag": "Audition"
- },
- {
- "id": 776,
- "tag": "C or Cplusplus program (web link to model)"
- },
- {
- "id": 767,
- "tag": "MATLAB (web link to model)"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1426,
- "tag": "ModelDB:126636"
- }
- ],
- "timestamp_created": "2024-01-12 09:30:03.603981+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/126636",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "949": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 949,
- "name": "A simplified cerebellar Purkinje neuron (the PPR model) (Brown et al. 2011)",
- "repository_type": "github",
- "summary": "These models were implemented in NEURON by Sherry-Ann Brown in the laboratory of Leslie M. Loew.\r\n\r\nThe files reproduce Figures 2c-f from Brown et al, 2011 \"Virtual NEURON: a Strategy For Merged Biochemical and Electrophysiological Modeling\".\r\n",
- "tags": [
- {
- "id": 579,
- "tag": "Active Dendrites"
- },
- {
- "id": 565,
- "tag": "Dendritic Action Potentials"
- },
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 580,
- "tag": "I M"
- },
- {
- "id": 739,
- "tag": "I Na,p"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 742,
- "tag": "I p,q"
- },
- {
- "id": 570,
- "tag": "Influence of Dendritic Geometry"
- },
- {
- "id": 763,
- "tag": "Intrinsic plasticity"
- },
- {
- "id": 756,
- "tag": "Methods"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1427,
- "tag": "ModelDB:126637"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 569,
- "tag": "Simplified Models"
- },
- {
- "id": 596,
- "tag": "Synaptic Integration"
- }
- ],
- "timestamp_created": "2024-01-12 09:30:04.199531+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/126637",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "950": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 950,
- "name": "NAcc medium spiny neuron: effects of cannabinoid withdrawal (Spiga et al. 2010)",
- "repository_type": "github",
- "summary": "Cannabinoid withdrawal produces a hypofunction of dopaminergic neurons targeting medium spiny neurons (MSN) of the forebrain. Administration of a CB1 receptor antagonist to control rats provoked structural abnormalities, reminiscent of those observed in withdrawal conditions and support the regulatory role of cannabinoids in neurogenesis, axonal growth and synaptogenesis. Experimental observations were incorporated into a realistic computational model which predicts a strong reduction in the excitability of morphologically-altered MSN, yielding a significant reduction in action potential output. These paper provided direct morphological evidence for functional abnormalities associated with cannabinoid dependence at the level of dopaminergic neurons and their post synaptic counterpart, supporting a hypodopaminergic state as a distinctive feature of the \u201caddicted brain\u201d.",
- "tags": [
- {
- "id": 727,
- "tag": "Action Potential Initiation"
- },
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 579,
- "tag": "Active Dendrites"
- },
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 841,
- "tag": "Addiction"
- },
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 730,
- "tag": "I A, slow"
- },
- {
- "id": 842,
- "tag": "I Krp"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1428,
- "tag": "ModelDB:126640"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 596,
- "tag": "Synaptic Integration"
- }
- ],
- "timestamp_created": "2024-01-12 09:30:04.797354+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/126640",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
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- "default_context": "master",
- "id": 951,
- "name": "CA1 pyramidal neuron: rebound spiking (Ascoli et al.2010)",
- "repository_type": "github",
- "summary": "The model demonstrates that CA1 pyramidal neurons support rebound spikes mediated by hyperpolarization-activated inward current (Ih), and normally masked by A-type potassium channels (KA). Partial KA reduction confined to one or few branches of the apical tuft may be sufficient to elicit a local spike following a train of synaptic inhibition. These data suggest that the plastic regulation of KA can provide a dynamic switch to unmask post-inhibitory spiking in CA1 pyramidal neurons, further increasing the signal processing power of the CA1 synaptic microcircuitry.",
- "tags": [
- {
- "id": 727,
- "tag": "Action Potential Initiation"
- },
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 579,
- "tag": "Active Dendrites"
- },
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 565,
- "tag": "Dendritic Action Potentials"
- },
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 763,
- "tag": "Intrinsic plasticity"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1429,
- "tag": "ModelDB:126776"
- },
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- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 596,
- "tag": "Synaptic Integration"
- }
- ],
- "timestamp_created": "2024-01-12 09:30:05.430005+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/126776",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "modeling"
- ],
- "default_context": "master",
- "id": 952,
- "name": "CA3 pyramidal neuron (Safiulina et al. 2010)",
- "repository_type": "github",
- "summary": "In this review some of the recent work carried out in our laboratory concerning the functional\r\nrole of GABAergic signalling at immature mossy fibres (MF)-CA3 principal cell synapses has\r\nbeen highlighted. To compare the relative strength of CA3 pyramidal cell\r\noutput in relation to their MF glutamatergic or GABAergic inputs in postnatal\r\ndevelopment, a realistic model was constructed taking into account the different\r\nbiophysical properties of these synapses.\r\n",
- "tags": [
- {
- "id": 727,
- "tag": "Action Potential Initiation"
- },
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 579,
- "tag": "Active Dendrites"
- },
- {
- "id": 566,
- "tag": "Bursting"
- },
- {
- "id": 565,
- "tag": "Dendritic Action Potentials"
- },
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 589,
- "tag": "I L high threshold"
- },
- {
- "id": 580,
- "tag": "I M"
- },
- {
- "id": 721,
- "tag": "I N"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 575,
- "tag": "I T low threshold"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1430,
- "tag": "ModelDB:126814"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 777,
- "tag": "Spike Frequency Adaptation"
- },
- {
- "id": 596,
- "tag": "Synaptic Integration"
- },
- {
- "id": 720,
- "tag": "Temporal Pattern Generation"
- }
- ],
- "timestamp_created": "2024-01-12 09:30:06.096654+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/126814",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "953": {
- "auto_sync": true,
- "content_types": "modeling",
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- "modeling"
- ],
- "default_context": "master",
- "id": 953,
- "name": "CN bushy, stellate neurons (Rothman, Manis 2003) (Brian)",
- "repository_type": "github",
- "summary": "Cochlear neuron model of Rothman & Manis (2003). Adapted from the Neuron implementation.",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 645,
- "tag": "Brian"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 591,
- "tag": "I K,leak"
- },
- {
- "id": 589,
- "tag": "I L high threshold"
- },
- {
- "id": 739,
- "tag": "I Na,p"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1431,
- "tag": "ModelDB:126899"
- },
- {
- "id": 620,
- "tag": "Python"
- },
- {
- "id": 720,
- "tag": "Temporal Pattern Generation"
- }
- ],
- "timestamp_created": "2024-01-12 09:34:36.611736+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/126899",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "954": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 954,
- "name": "Alcohol excites Cerebellar Golgi Cells by inhibiting the Na+/K+ ATPase (Botta et al.2010)",
- "repository_type": "github",
- "summary": "Patch-clamp in cerebellar slices and computer modeling show that ethanol excites Golgi cells by inhibiting the Na+/K+ ATPase. In particular, voltage-clamp recordings of Na+/K+ ATPase currents indicated that ethanol partially inhibits this pump and this effect could be mimicked by low concentrations of the Na+/K+ ATPase blocker ouabain. The partial inhibition of Na+/K+ ATPase in a computer model of the Golgi cell reproduced these experimental findings that established a novel mechanism of action of ethanol on neural excitability.",
- "tags": [
- {
- "id": 839,
- "tag": "Alcohol Use Disorder"
- },
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 748,
- "tag": "Markov-type model"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1432,
- "tag": "ModelDB:127021"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 740,
- "tag": "Na/K pump"
- }
- ],
- "timestamp_created": "2024-01-12 09:34:37.173882+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/127021",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "955": {
- "auto_sync": true,
- "content_types": "modeling",
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- "modeling"
- ],
- "default_context": "master",
- "id": 955,
- "name": "Control of vibrissa motoneuron firing (Harish and Golomb 2010)",
- "repository_type": "github",
- "summary": "We construct and analyze a single-compartment, conductance-based model of vibrissa motoneurons. Low firing rates are supported in extended regimes by adaptation currents and the minimal firing rate decreases with the persistent sodium conductance gNaP and increases with M-potassium \r\nand h-cation conductances. Suprathreshold resonance results from the locking properties of vMN firing to stimuli and from reduction of firing rates at low frequencies by slow M and afterhyperpolarization potassium conductances. h conductance only slightly affects the suprathreshold resonance. When a vMN is subjected to a small periodic CPG input, serotonergically induced gNaP elevation may transfer the system from quiescence to a firing state that is highly\r\nlocked to the CPG input.\r\n",
- "tags": [
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 580,
- "tag": "I M"
- },
- {
- "id": 739,
- "tag": "I Na,p"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 1433,
- "tag": "I_AHP"
- },
- {
- "id": 1434,
- "tag": "Locking, mixed mode"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1435,
- "tag": "ModelDB:127022"
- },
- {
- "id": 759,
- "tag": "XPPAUT"
- }
- ],
- "timestamp_created": "2024-01-12 09:34:37.796393+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/127022",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "956": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 956,
- "name": "Pipette and membrane patch geometry effects on GABAa currents patch-clamp exps (Moroni et al. 2011)",
- "repository_type": "github",
- "summary": "Ion currents, mediated by GABAa-receptors in outside-out membrane patches, may alter the concentration of Chloride ions inside the pipette and the membrane patch.\r\n\r\nGABAa-receptors are in fact ionotropic synaptic receptors, selective to Chloride ions. Therefore, chloride fluxes across the membrane patch correlate to GABAa-receptor opening.\r\n\r\nChloride ions accumulation, depletion and diffusion, inside the pipette and the membrane patch, affect by definition the Chloride equilibrium (i.e. Nernst) electrical potential. This in turn changes the ionic driving force underlying GABAa-mediated currents.\r\n\r\nIt follows that, in case of very small volumes and confined geometries, voltage-clamp recordings of GABAa-receptor currents carry information on both i) Chloride diffusion and ii) receptor kinetics.\r\n\r\nThe relevance of (i) and (ii) have been studied numerically by defining a 1-dimensional biophysical model, released here to the interested user.",
- "tags": [
- {
- "id": 765,
- "tag": "I Chloride"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1436,
- "tag": "ModelDB:127190"
- }
- ],
- "timestamp_created": "2024-01-12 09:34:38.402351+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/127190",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "957": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 957,
- "name": "Network topologies for producing limited sustained activation (Kaiser and Hilgetag 2010)",
- "repository_type": "github",
- "summary": "Uses networks of cellular automata to test hypotheses about network topologies that can produce limited, sustained activity. Inspired by empirically-based ideas about neocortical architecture, but conceived and implemented at a level of abstraction that is not closely linked to empirical observations.",
- "tags": [
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 855,
- "tag": "Connectivity matrix"
- },
- {
- "id": 767,
- "tag": "MATLAB (web link to model)"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1437,
- "tag": "ModelDB:127192"
- }
- ],
- "timestamp_created": "2024-01-12 09:34:39.047958+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/127192",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "958": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 958,
- "name": "Spatial summation of excitatory and inhibitory inputs in pyramidal neurons (Hao et al. 2010)",
- "repository_type": "github",
- "summary": "\"... Based on realistic modeling and experiments in rat hippocampal\r\nslices, we derived a simple arithmetic rule for spatial summation\r\nof concurrent excitatory glutamatergic inputs (E) and inhibitory\r\nGABAergic inputs (I). \r\n\r\nThe somatic response can be well approximated\r\nas the sum of the excitatory postsynaptic potential (EPSP), the inhibitory\r\npostsynaptic potential (IPSP), and a nonlinear term proportional\r\nto their product (k*EPSP*IPSP), where the coefficient k reflects the\r\nstrength of shunting effect.\r\n...\"",
- "tags": [
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 570,
- "tag": "Influence of Dendritic Geometry"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1438,
- "tag": "ModelDB:127305"
- },
- {
- "id": 743,
- "tag": "NEURON (web link to model)"
- },
- {
- "id": 596,
- "tag": "Synaptic Integration"
- }
- ],
- "timestamp_created": "2024-01-12 09:34:39.646447+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/127305",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "959": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 959,
- "name": "A model of the temporal pattern generator of C. elegans egg-laying behavior (Zhang et. al 2010)",
- "repository_type": "github",
- "summary": "\"... We suggest that the HSN neuron is the executive neuron driving egg-laying events. We propose that the VC neurons act as \"single egg counters\" that inhibit HSN activity for short periods in response to individual egg-laying events. We further propose that the uv1 neuroendocrine cells are \"cluster counters\", which inhibit HSN activity for longer periods and are responsible for the time constant of the inactive phase. Together they form an integrated circuit that drives the clustered egg-laying pattern. ...\"",
- "tags": [
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1439,
- "tag": "ModelDB:127321"
- },
- {
- "id": 1440,
- "tag": "R (web link to model)"
- },
- {
- "id": 569,
- "tag": "Simplified Models"
- },
- {
- "id": 720,
- "tag": "Temporal Pattern Generation"
- }
- ],
- "timestamp_created": "2024-01-12 09:34:40.134218+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/127321",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "960": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 960,
- "name": "A two-stage model of dendritic integration in CA1 pyramidal neurons (Katz et al. 2009)",
- "repository_type": "github",
- "summary": "\"... In a two-stage integration model, inputs contribute directly to dendritic spikes, and outputs from multiple branches sum in the axon. ... We used serial-section electron microscopy to reconstruct individual apical oblique dendritic branches of CA1 pyramidal neurons and observe a synapse distribution consistent with the two-stage integration model. Computational modeling suggests that the observed synapse distribution enhances the contribution of each dendritic branch to neuronal output.\"",
- "tags": [
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1441,
- "tag": "ModelDB:127351"
- },
- {
- "id": 743,
- "tag": "NEURON (web link to model)"
- },
- {
- "id": 596,
- "tag": "Synaptic Integration"
- }
- ],
- "timestamp_created": "2024-01-12 09:34:40.626197+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/127351",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "961": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 961,
- "name": "Prediction for the presence of voltage-gated Ca2+ channels in myelinated central axons (Brown 2003)",
- "repository_type": "github",
- "summary": "\"The objective of this current study was to investigate whether voltage gated Ca(2+) channels are present \r\non axons of the adult rat optic nerve (RON).\r\n\r\nSimulations of axonal excitability using a Hodgkin-Huxley based \r\none-compartment model incorporating I(Na), I(K) and leak currents were used to predict conditions under \r\nwhich the potential contribution of a Ca(2+) current to an evoked action potential could be measured. \r\n\r\n... , as predicted by the simulation, reducing the repolarizing effect of I(K) by adding the \r\nK(+) channel blocker 4-AP revealed a Ca(2+) component on the repolarizing phase of the action potential that \r\nwas blocked by the Ca(2+) channel inhibitor nifedipine.\"\r\n",
- "tags": [
- {
- "id": 728,
- "tag": "Axonal Action Potentials"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1442,
- "tag": "ModelDB:127355"
- },
- {
- "id": 569,
- "tag": "Simplified Models"
- },
- {
- "id": 732,
- "tag": "Tutorial/Teaching"
- },
- {
- "id": 759,
- "tag": "XPPAUT"
- }
- ],
- "timestamp_created": "2024-01-12 09:34:41.184227+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/127355",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "962": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 962,
- "name": "Basal ganglia network model of subthalamic deep brain stimulation (Hahn and McIntyre 2010)",
- "repository_type": "github",
- "summary": "Basal ganglia network model of parkinsonian activity and subthalamic deep brain stimulation in non-human primates from the article \r\n\r\nInstructions are provided in the README.txt file. Contact hahnp@ccf.org if you have any questions about the implementation of the model. Please include \"ModelDB - BGnet\" in the subject heading.",
- "tags": [
- {
- "id": 566,
- "tag": "Bursting"
- },
- {
- "id": 831,
- "tag": "Deep brain stimulation"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1443,
- "tag": "ModelDB:127388"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 801,
- "tag": "Parkinson's"
- }
- ],
- "timestamp_created": "2024-01-12 09:34:41.689980+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/127388",
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- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
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- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "id": 963,
- "name": "Regulation of firing frequency in a midbrain dopaminergic neuron model (Kuznetsova et al. 2010)",
- "repository_type": "github",
- "summary": "A dopaminergic (DA) neuron model with a morphologicaly realistic dendritic architecture. The model captures several salient features of DA neurons under different pharmacological manipulations and exhibits depolarization block for sufficiently high current pulses applied to the soma.",
- "tags": [
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
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- "id": 589,
- "tag": "I L high threshold"
- },
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- "id": 721,
- "tag": "I N"
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- "id": 574,
- "tag": "I Na,t"
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- "id": 575,
- "tag": "I T low threshold"
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- "id": 564,
- "tag": "ModelDB"
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- "id": 1444,
- "tag": "ModelDB:127507"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 740,
- "tag": "Na/K pump"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 720,
- "tag": "Temporal Pattern Generation"
- }
- ],
- "timestamp_created": "2024-01-12 09:34:42.206242+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/127507",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "id": 964,
- "name": "Temporal and spatial characteristics of vibrissa responses to motor commands (Simony et al. 2010)",
- "repository_type": "github",
- "summary": "\"A mechanistic description of the generation of whisker movements is essential for understanding the control of whisking and vibrissal\r\nactive touch. We explore how facial-motoneuron spikes are translated, via an intrinsic muscle, to whisker movements. This is achieved by\r\nconstructing, simulating, and analyzing a computational, biomechanical model of the motor plant, and by measuring spiking to movement\r\ntransformations at small and large angles using high-precision whisker tracking in vivo. \r\n...\r\nThe model provides a direct translation from motoneuron spikes to whisker movements\r\nand can serve as a building block in closed-loop motor\u2013sensory models of active touch.\"",
- "tags": [
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1445,
- "tag": "ModelDB:127512"
- }
- ],
- "timestamp_created": "2024-01-12 09:34:43.141964+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/127512",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
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- "modeling"
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- "id": 965,
- "name": "Comparison of full and reduced globus pallidus models (Hendrickson 2010)",
- "repository_type": "github",
- "summary": "In this paper, we studied what features of realistic full model activity patterns can and cannot be preserved by morphologically reduced models. To this end, we reduced the morphological complexity of a full globus pallidus neuron model possessing active dendrites and compared its spontaneous and driven responses to those of the reduced models.",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 579,
- "tag": "Active Dendrites"
- },
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 600,
- "tag": "GENESIS"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 730,
- "tag": "I A, slow"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
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- "id": 739,
- "tag": "I Na,p"
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- {
- "id": 756,
- "tag": "Methods"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1446,
- "tag": "ModelDB:127728"
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- {
- "id": 791,
- "tag": "Rate-coding model neurons"
- },
- {
- "id": 569,
- "tag": "Simplified Models"
- },
- {
- "id": 596,
- "tag": "Synaptic Integration"
- }
- ],
- "timestamp_created": "2024-01-12 09:34:43.721480+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/127728",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "966": {
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- "content_types": "modeling",
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- "id": 966,
- "name": "Global structure, robustness, and modulation of neuronal models (Goldman et al. 2001)",
- "repository_type": "github",
- "summary": "\"The electrical characteristics of many neurons are remarkably\r\nrobust in the face of changing internal and external conditions.\r\n\r\nAt the same time, neurons can be highly sensitive to neuromodulators.\r\n\r\nWe find correlates of this dual robustness and\r\nsensitivity in a global analysis of the structure of a\r\nconductance-based model neuron.\r\n...\"",
- "tags": [
- {
- "id": 566,
- "tag": "Bursting"
- },
- {
- "id": 755,
- "tag": "C or Cplusplus program"
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- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
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- "id": 589,
- "tag": "I L high threshold"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
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- "id": 584,
- "tag": "I Potassium"
- },
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- "id": 575,
- "tag": "I T low threshold"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1447,
- "tag": "ModelDB:127878"
- },
- {
- "id": 823,
- "tag": "Phase Response Curves"
- },
- {
- "id": 720,
- "tag": "Temporal Pattern Generation"
- }
- ],
- "timestamp_created": "2024-01-12 09:34:44.252059+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/127878",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "967": {
- "auto_sync": true,
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- "modeling"
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- "default_context": "master",
- "id": 967,
- "name": "Spectral method and high-order finite differences for nonlinear cable (Omurtag and Lytton 2010)",
- "repository_type": "github",
- "summary": "We use high-order approximation schemes for the space derivatives in the nonlinear cable equation and investigate the behavior of numerical solution errors by using exact solutions, where available, and grid convergence. The space derivatives are numerically approximated by means of differentiation matrices. A flexible form for the injected current is used that can be adjusted smoothly from a very broad to a narrow peak, which leads, for the passive cable, to a simple, exact solution. We provide comparisons with exact solutions in an unbranched passive cable, the convergence of solutions with progressive refinement of the grid in an active cable, and the simulation of spike initiation in a biophysically realistic single-neuron model.\r\n",
- "tags": [
- {
- "id": 727,
- "tag": "Action Potential Initiation"
- },
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 579,
- "tag": "Active Dendrites"
- },
- {
- "id": 565,
- "tag": "Dendritic Action Potentials"
- },
- {
- "id": 591,
- "tag": "I K,leak"
- },
- {
- "id": 861,
- "tag": "I_K,Na"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 756,
- "tag": "Methods"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1448,
- "tag": "ModelDB:127887"
- }
- ],
- "timestamp_created": "2024-01-12 09:34:44.791172+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/127887",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "968": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 968,
- "name": "Generating coherent patterns of activity from chaotic neural networks (Sussillo and Abbott 2009)",
- "repository_type": "github",
- "summary": "\"Neural circuits display complex activity patterns both\r\nspontaneously and when responding to a stimulus or\r\ngenerating a motor output.\r\n\r\nHow are these two forms\r\nof activity related? \r\n\r\nWe develop a procedure called\r\nFORCE learning for modifying synaptic strengths\r\neither external to or within a model neural network\r\nto change chaotic spontaneous activity into a wide\r\nvariety of desired activity patterns.\r\n...\r\n Our results\r\nreproduce data on premovement activity in motor\r\nand premotor cortex, and suggest that synaptic plasticity\r\nmay be a more rapid and powerful modulator of\r\nnetwork activity than generally appreciated.\"",
- "tags": [
- {
- "id": 767,
- "tag": "MATLAB (web link to model)"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1449,
- "tag": "ModelDB:127967"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 791,
- "tag": "Rate-coding model neurons"
- },
- {
- "id": 720,
- "tag": "Temporal Pattern Generation"
- }
- ],
- "timestamp_created": "2024-01-12 09:34:45.396852+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/127967",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "969": {
- "auto_sync": true,
- "content_types": "modeling",
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- "modeling"
- ],
- "default_context": "master",
- "id": 969,
- "name": "Accurate and fast simulation of channel noise in conductance-based model neurons (Linaro et al 2011)",
- "repository_type": "github",
- "summary": "We introduce and operatively present a general method to simulate channel noise in conductance-based model neurons, with modest computational overheads.\r\n\r\nOur approach may be considered as an accurate generalization of previous proposal methods,\r\nto the case of voltage-, ion-, and ligand-gated channels with arbitrary complexity.\r\n\r\nWe focus on the discrete Markov process descriptions, routinely employed in experimental\r\nidentification of voltage-gated channels and synaptic receptors.",
- "tags": [
- {
- "id": 755,
- "tag": "C or Cplusplus program"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 567,
- "tag": "Ion Channel Kinetics"
- },
- {
- "id": 748,
- "tag": "Markov-type model"
- },
- {
- "id": 756,
- "tag": "Methods"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1450,
- "tag": "ModelDB:127992"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 620,
- "tag": "Python"
- },
- {
- "id": 569,
- "tag": "Simplified Models"
- }
- ],
- "timestamp_created": "2024-01-12 09:34:45.994236+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/127992",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "970": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 970,
- "name": "Olfactory bulb cluster formation (Migliore et al. 2010)",
- "repository_type": "github",
- "summary": "Functional roles of distributed synaptic clusters in the mitral-granule cell network of the olfactory bulb.",
- "tags": [
- {
- "id": 727,
- "tag": "Action Potential Initiation"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1451,
- "tag": "ModelDB:127995"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 588,
- "tag": "Olfaction"
- },
- {
- "id": 724,
- "tag": "Short-term Synaptic Plasticity"
- }
- ],
- "timestamp_created": "2024-01-12 09:34:46.494562+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/127995",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "971": {
- "auto_sync": true,
- "content_types": "modeling",
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- "modeling"
- ],
- "default_context": "main",
- "id": 971,
- "name": "Rapid desynchronization of an electrically coupled Golgi cell network (Vervaeke et al. 2010)",
- "repository_type": "github",
- "summary": "Electrical synapses between interneurons contribute to synchronized firing and network oscillations in the brain. However, little is known about how such networks respond to excitatory synaptic input. In addition to detailed electrophysiological recordings and histological investigations of electrically coupled Golgi cells in the cerebellum, a detailed network model of these cells was created. The cell models are based on reconstructed Golgi cell morphologies and the active conductances are taken from an earlier abstract Golgi cell model (Solinas et al 2007, accession no. 112685). Our results show that gap junction coupling can sometimes be inhibitory and either promote network synchronization or trigger rapid network desynchronization depending on the synaptic input. The model is available as a neuroConstruct project and can executable scripts can be generated for the NEURON simulator.",
- "tags": [
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 589,
- "tag": "I L high threshold"
- },
- {
- "id": 580,
- "tag": "I M"
- },
- {
- "id": 739,
- "tag": "I Na,p"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 1433,
- "tag": "I_AHP"
- },
- {
- "id": 567,
- "tag": "Ion Channel Kinetics"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1452,
- "tag": "ModelDB:127996"
- },
- {
- "id": 848,
- "tag": "NeuroML (web link to model)"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 586,
- "tag": "Synchronization"
- },
- {
- "id": 773,
- "tag": "neuroConstruct (web link to model)"
- }
- ],
- "timestamp_created": "2024-01-12 09:34:47.003699+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/127996",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "972": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 972,
- "name": "Stochastic ion channels and neuronal morphology (Cannon et al. 2010)",
- "repository_type": "github",
- "summary": "\"... We introduce and\r\nvalidate new computational tools that enable efficient generation and simulation of models containing stochastic ion\r\nchannels distributed across dendritic and axonal membranes.\r\n\r\nComparison of five morphologically distinct neuronal cell\r\ntypes reveals that when all simulated neurons contain identical densities of stochastic ion channels, the amplitude of\r\nstochastic membrane potential fluctuations differs between cell types and depends on sub-cellular location.\r\n\r\n...\" The code is downloadable and more information is available at http://www.psics.org/",
- "tags": [
- {
- "id": 727,
- "tag": "Action Potential Initiation"
- },
- {
- "id": 565,
- "tag": "Dendritic Action Potentials"
- },
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 570,
- "tag": "Influence of Dendritic Geometry"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1453,
- "tag": "ModelDB:128043"
- },
- {
- "id": 1454,
- "tag": "PSICS"
- }
- ],
- "timestamp_created": "2024-01-12 09:34:47.628412+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/128043",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "973": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 973,
- "name": "Generic Bi-directional Real-time Neural Interface (Zrenner et al. 2010)",
- "repository_type": "github",
- "summary": "Matlab/Simulink toolkit for generic multi-channel short-latency bi-directional neural-computer interactions. High-bandwidth (> 10 megabit per second) neural recording data can be analyzed in real-time while simultaneously generating specific complex electrical stimulation feedback with deterministically timed responses at sub-millisecond resolution. The commercially available 60-channel extracellular multi-electrode recording and stimulation set-up (Multichannelsystems GmbH MEA60) is used as an example hardware implementation.",
- "tags": [
- {
- "id": 755,
- "tag": "C or Cplusplus program"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 756,
- "tag": "Methods"
- },
- {
- "id": 564,
- "tag": "ModelDB"
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- {
- "id": 1455,
- "tag": "ModelDB:128068"
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- {
- "id": 824,
- "tag": "Simulink"
- }
- ],
- "timestamp_created": "2024-01-12 09:34:48.136798+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/128068",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "974": {
- "auto_sync": true,
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- "modeling"
- ],
- "default_context": "master",
- "id": 974,
- "name": "Fast sodium channel gating in mossy fiber axons (Schmidt-Hieber et al. 2010)",
- "repository_type": "github",
- "summary": "\"... To study the mechanisms underlying AP initiation in unmyelinated hippocampal mossy fibers of adult mice, we recorded sodium currents in axonal and somatic membrane patches. \r\n\r\nWe demonstrate that sodium channel density in the proximal axon is ~5 times higher than in the soma. \r\n\r\nFurthermore, sodium channel activation and inactivation are ~2 times faster. \r\n\r\nModeling revealed that the fast activation localized the initiation site to the proximal axon even upon strong synaptic stimulation, while fast inactivation contributed to energy-efficient membrane charging during APs. ...\"",
- "tags": [
- {
- "id": 727,
- "tag": "Action Potential Initiation"
- },
- {
- "id": 564,
- "tag": "ModelDB"
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- "id": 1456,
- "tag": "ModelDB:128079"
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- "id": 577,
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- "timestamp_created": "2024-01-12 09:34:48.638274+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/128079",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "975": {
- "auto_sync": true,
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- "modeling"
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- "default_context": "master",
- "id": 975,
- "name": "Short term plasticity at the cerebellar granule cell (Nieus et al. 2006)",
- "repository_type": "github",
- "summary": "The model reproduces short term plasticity of the mossy fibre to granule cell synapse. To reproduce synaptic currents recorded in experiments, a model of presynaptic release was used to determine the concentration of glutamate in the synaptic cleft that ultimately determined a synaptic response. The parameters of facilitation and depression were determined deconvolving AMPA EPSCs.",
- "tags": [
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1457,
- "tag": "ModelDB:128446"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 724,
- "tag": "Short-term Synaptic Plasticity"
- }
- ],
- "timestamp_created": "2024-01-12 09:34:49.139072+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/128446",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "976": {
- "auto_sync": true,
- "content_types": "modeling",
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- "modeling"
- ],
- "default_context": "master",
- "id": 976,
- "name": "Leaky integrate-and-fire model of spike frequency adaptation in the LGMD (Gabbiani and Krapp 2006)",
- "repository_type": "github",
- "summary": "This will reproduce Figure 9 of Gabbiani and Krapp (2006) J Neurophysiol 96:2951-2962.\r\n\r\nThe figure simply shows that a leaky-integrate-and-fire model cannot reproduce spike frequency adaptation as it is seen experimentally in \r\nthe LGMD neuron.\r\n",
- "tags": [
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1458,
- "tag": "ModelDB:128449"
- },
- {
- "id": 777,
- "tag": "Spike Frequency Adaptation"
- }
- ],
- "timestamp_created": "2024-01-12 09:34:49.643483+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/128449",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "977": {
- "auto_sync": true,
- "content_types": "modeling",
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- "modeling"
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- "default_context": "master",
- "id": 977,
- "name": "On stochastic diff. eq. models for ion channel noise in Hodgkin-Huxley neurons (Goldwyn et al. 2010)",
- "repository_type": "github",
- "summary": "\" ... We analyze three SDE models that have been proposed as approximations to the Markov chain model: one that describes the states of the ion channels and two that describe the states of the ion channel subunits. We show that the former channel-based approach can capture the distribution of channel noise and its effect on spiking in a Hodgkin-Huxley neuron model to a degree not previously demonstrated, but the latter two subunit-based approaches cannot. ...\"",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 710,
- "tag": "FORTRAN"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 567,
- "tag": "Ion Channel Kinetics"
- },
- {
- "id": 756,
- "tag": "Methods"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1459,
- "tag": "ModelDB:128502"
- },
- {
- "id": 874,
- "tag": "Noise Sensitivity"
- }
- ],
- "timestamp_created": "2024-01-12 09:34:50.161969+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/128502",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "978": {
- "auto_sync": true,
- "content_types": "modeling",
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- "modeling"
- ],
- "default_context": "master",
- "id": 978,
- "name": "Mathematical model for windup (Aguiar et al. 2010)",
- "repository_type": "github",
- "summary": "\"Windup is characterized as a frequency-dependent\r\nincrease in the number of evoked action potentials in dorsal\r\nhorn neurons in response to electrical stimulation of afferent C-fibers.\r\n... \r\nThe approach presented here relies on mathematical and\r\ncomputational analysis to study the mechanism(s) underlying windup.\r\n\r\nFrom experimentally obtained windup profiles, we extract the time\r\nscale of the facilitation mechanisms that may support the characteristics\r\nof windup.\r\n\r\nGuided by these values and using simulations of a\r\nbiologically realistic compartmental model of a wide dynamic range\r\n(WDR) neuron, we are able to assess the contribution of each\r\nmechanism for the generation of action potentials windup.\r\n...\"",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 589,
- "tag": "I L high threshold"
- },
- {
- "id": 721,
- "tag": "I N"
- },
- {
- "id": 739,
- "tag": "I Na,p"
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- "id": 574,
- "tag": "I Na,t"
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- "id": 655,
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- "id": 1460,
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- "id": 577,
- "tag": "NEURON"
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- ],
- "timestamp_created": "2024-01-12 09:34:50.700989+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/128559",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "modeling"
- ],
- "default_context": "master",
- "id": 979,
- "name": "Grid cell oscillatory interference with noisy network oscillators (Zilli and Hasselmo 2010)",
- "repository_type": "github",
- "summary": "To examine whether an oscillatory interference model of grid cell activity could work if the oscillators were noisy neurons, we implemented these simulations. Here the oscillators are networks (either synaptically- or gap-junction--coupled) of one or more noisy neurons (either Izhikevich's simple model or a Hodgkin-Huxley--type biophysical model) which drive a postsynaptic cell (which may be integrate-and-fire, resonate-and-fire, or the simple model) which should fire spatially as a grid cell if the simulation is successful.",
- "tags": [
- {
- "id": 1461,
- "tag": "Grid cell"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 591,
- "tag": "I K,leak"
- },
- {
- "id": 739,
- "tag": "I Na,p"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1462,
- "tag": "ModelDB:128812"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 569,
- "tag": "Simplified Models"
- },
- {
- "id": 777,
- "tag": "Spike Frequency Adaptation"
- },
- {
- "id": 586,
- "tag": "Synchronization"
- }
- ],
- "timestamp_created": "2024-01-12 09:34:51.218995+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/128812",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "980": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 980,
- "name": "Medial reticular formation of the brainstem: anatomy and dynamics (Humphries et al. 2006, 2007)",
- "repository_type": "github",
- "summary": "A set of models to study the medial reticular formation (mRF) of the brainstem. We developed a collection of algorithms to derive the adult-state wiring of the model: one set a stochastic model; the other set mimicking the developmental process. We found that the anatomical models had small-world properties, irrespective of the choice of algorithm; and that the cluster-like organisation of the mRF may have arisen to minimise wiring costs. (The model code includes options to be run as dynamic models; papers examining these dynamics are included in the .zip file).",
- "tags": [
- {
- "id": 771,
- "tag": "Action Selection/Decision Making"
- },
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 855,
- "tag": "Connectivity matrix"
- },
- {
- "id": 793,
- "tag": "Development"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1463,
- "tag": "ModelDB:128816"
- },
- {
- "id": 758,
- "tag": "Sensory processing"
- }
- ],
- "timestamp_created": "2024-01-12 09:34:51.781229+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/128816",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "981": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 981,
- "name": "Dopamine-modulated medium spiny neuron, reduced model (Humphries et al. 2009)",
- "repository_type": "github",
- "summary": "We extended Izhikevich's reduced model of the striatal medium spiny neuron (MSN) to account for dopaminergic modulation of its intrinsic ion channels and synaptic inputs. We tuned our D1 and D2 receptor MSN models using data from a recent (Moyer et al, 2007) large-scale compartmental model. Our new models capture the input-output relationships for both current injection and spiking input with remarkable accuracy, despite the order of magnitude decrease in system size. They also capture the paired pulse facilitation shown by MSNs. Our dopamine models predict that synaptic effects dominate intrinsic effects for all levels of D1 and D2 receptor activation. Our analytical work on these models predicts that the MSN is never bistable. Nonetheless, these MSN models can produce a spontaneously bimodal membrane potential similar to that recently observed in vitro following application of NMDA agonists. We demonstrate that this bimodality is created by modelling the agonist effects as slow, irregular and massive jumps in NMDA conductance and, rather than a form of bistability, is due to the voltage-dependent blockade of NMDA receptors",
- "tags": [
- {
- "id": 727,
- "tag": "Action Potential Initiation"
- },
- {
- "id": 804,
- "tag": "Bifurcation"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1464,
- "tag": "ModelDB:128818"
- },
- {
- "id": 568,
- "tag": "Parameter Fitting"
- },
- {
- "id": 801,
- "tag": "Parkinson's"
- },
- {
- "id": 569,
- "tag": "Simplified Models"
- }
- ],
- "timestamp_created": "2024-01-12 09:34:52.294575+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/128818",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "982": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 982,
- "name": "Striatal GABAergic microcircuit, dopamine-modulated cell assemblies (Humphries et al. 2009)",
- "repository_type": "github",
- "summary": "To begin identifying potential dynamically-defined computational elements within the striatum, we constructed a new three-dimensional model of the striatal microcircuit's connectivity, and instantiated this with our dopamine-modulated neuron models of the MSNs and FSIs. A new model of gap junctions between the FSIs was introduced and tuned to experimental data. We introduced a novel multiple spike-train analysis method, and apply this to the outputs of the model to find groups of synchronised neurons at multiple time-scales. We found that, with realistic in vivo background input, small assemblies of synchronised MSNs spontaneously appeared, consistent with experimental observations, and that the number of assemblies and the time-scale of synchronisation was strongly dependent on the simulated concentration of dopamine. We also showed that feed-forward inhibition from the FSIs counter-intuitively increases the firing rate of the MSNs.",
- "tags": [
- {
- "id": 771,
- "tag": "Action Selection/Decision Making"
- },
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 855,
- "tag": "Connectivity matrix"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1465,
- "tag": "ModelDB:128874"
- },
- {
- "id": 801,
- "tag": "Parkinson's"
- },
- {
- "id": 587,
- "tag": "Spatio-temporal Activity Patterns"
- },
- {
- "id": 586,
- "tag": "Synchronization"
- },
- {
- "id": 720,
- "tag": "Temporal Pattern Generation"
- }
- ],
- "timestamp_created": "2024-01-12 09:34:52.810398+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/128874",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "983": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 983,
- "name": "Synthesis of spatial tuning functions from theta cell spike trains (Welday et al., 2011)",
- "repository_type": "github",
- "summary": "A single compartment model reproduces the firing rate maps of place, grid, and boundary cells by receiving inhibitory inputs from theta cells. The theta cell spike trains are modulated by the rat's movement velocity in such a way that phase interference among their burst pattern creates spatial envelope function which simulate the firing rate maps.",
- "tags": [
- {
- "id": 1466,
- "tag": "Envelope synthesis"
- },
- {
- "id": 1461,
- "tag": "Grid cell"
- },
- {
- "id": 739,
- "tag": "I Na,p"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1467,
- "tag": "ModelDB:129067"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 799,
- "tag": "Place cell/field"
- },
- {
- "id": 586,
- "tag": "Synchronization"
- }
- ],
- "timestamp_created": "2024-01-12 09:34:53.365421+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/129067",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "984": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 984,
- "name": "Continuous time stochastic model for neurite branching (van Elburg 2011)",
- "repository_type": "github",
- "summary": "\"In this paper we introduce a continuous time stochastic neurite branching model closely related to the discrete time stochastic BES-model. The discrete time BES-model is underlying current attempts to simulate cortical development, but is difficult to analyze. The new continuous time formulation facilitates analytical treatment thus allowing us to examine the structure of the model more closely. ...\"",
- "tags": [
- {
- "id": 755,
- "tag": "C or Cplusplus program"
- },
- {
- "id": 793,
- "tag": "Development"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1468,
- "tag": "ModelDB:129071"
- }
- ],
- "timestamp_created": "2024-01-12 09:34:53.859777+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/129071",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "985": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 985,
- "name": "Increased computational accuracy in multi-compartmental cable models (Lindsay et al. 2005)",
- "repository_type": "github",
- "summary": "Compartmental models of dendrites are the most widely used tool for investigating their electrical\r\nbehaviour. \r\n\r\nTraditional models assign a single potential to a compartment. \r\n\r\nThis potential is associated with the membrane potential at the centre of the segment represented by the compartment.\r\n\r\nAll input to that segment, independent of its location on the segment, is assumed to act at the centre of the segment with the potential of the\r\ncompartment. \r\n\r\nBy contrast, the compartmental model introduced in this article assigns a potential to each end of a\r\nsegment, and takes into account the location of input to a segment on the model solution by partitioning the effect of\r\nthis input between the axial currents at the proximal and distal boundaries of segments.\r\n\r\nFor a given neuron, the new and traditional approaches to compartmental modelling use the same number of locations at which the membrane\r\npotential is to be determined, and lead to ordinary differential equations that are structurally identical. However, the\r\nsolution achieved by the new approach gives an order of magnitude better accuracy and precision than that achieved\r\nby the latter in the presence of point process input.",
- "tags": [
- {
- "id": 755,
- "tag": "C or Cplusplus program"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 756,
- "tag": "Methods"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1469,
- "tag": "ModelDB:129149"
- },
- {
- "id": 577,
- "tag": "NEURON"
- }
- ],
- "timestamp_created": "2024-01-12 09:34:54.385672+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/129149",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "986": {
- "auto_sync": true,
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- "default_context": "master",
- "id": 986,
- "name": "Intracortical synaptic potential modulation by presynaptic somatic potential (Shu et al. 2006, 2007)",
- "repository_type": "github",
- "summary": "\" ... Here we show that the voltage fluctuations associated with\r\ndendrosomatic synaptic activity propagate significant distances\r\nalong the axon, and that modest changes in the somatic membrane\r\npotential of the presynaptic neuron modulate the amplitude\r\nand duration of axonal action potentials and, through a Ca21-\r\ndependent mechanism, the average amplitude of the postsynaptic\r\npotential evoked by these spikes. \r\n\r\nThese results indicate that\r\nsynaptic activity in the dendrite and soma controls not only the\r\npattern of action potentials generated, but also the amplitude of\r\nthe synaptic potentials that these action potentials initiate in local\r\ncortical circuits, resulting in synaptic transmission that is a\r\nmixture of triggered and graded (analogue) signals.\"",
- "tags": [
- {
- "id": 727,
- "tag": "Action Potential Initiation"
- },
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 589,
- "tag": "I L high threshold"
- },
- {
- "id": 580,
- "tag": "I M"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 1433,
- "tag": "I_AHP"
- },
- {
- "id": 747,
- "tag": "I_KD"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1470,
- "tag": "ModelDB:135787"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 596,
- "tag": "Synaptic Integration"
- }
- ],
- "timestamp_created": "2024-01-12 09:34:55.296784+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/135787",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "987": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 987,
- "name": "Action potential reconstitution from measured current waveforms (Alle et al. 2009)",
- "repository_type": "github",
- "summary": "This NEURON code reconstitutes action potentials in a model of a hippocampal mossy fiber from experimentally measured sodium, potassium and calcium current waveforms as described in Alle et al. (2009).\r\n",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1471,
- "tag": "ModelDB:135838"
- },
- {
- "id": 577,
- "tag": "NEURON"
- }
- ],
- "timestamp_created": "2024-01-12 09:34:55.865463+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/135838",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "988": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 988,
- "name": "AP back-prop. explains threshold variability and rapid rise (McCormick et al. 2007, Yu et al. 2008)",
- "repository_type": "github",
- "summary": "This simple axon-soma model explained how the rapid rising phase in the somatic spike is derived from the propagated axon initiated spike,\r\nand how the somatic spike threshold variance is affected by spike propagation.",
- "tags": [
- {
- "id": 727,
- "tag": "Action Potential Initiation"
- },
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 589,
- "tag": "I L high threshold"
- },
- {
- "id": 580,
- "tag": "I M"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 575,
- "tag": "I T low threshold"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 1433,
- "tag": "I_AHP"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1472,
- "tag": "ModelDB:135839"
- },
- {
- "id": 577,
- "tag": "NEURON"
- }
- ],
- "timestamp_created": "2024-01-12 09:34:56.402350+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/135839",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "989": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 989,
- "name": "Selective control of cortical axonal spikes by a slowly inactivating K+ current (Shu et al. 2007)",
- "repository_type": "github",
- "summary": "We discovered a low-threshold, slowly inactivating K+ current, containing Kv1.2 alpha subunits, in axon initial segment, playing a key role in the modulation of spike threshold and spike duration as well as\r\nthe spike timing in prefrontal cortex layer V pyramidal cell of ferrets and rats.\r\nA kd.mod file implements this D current and put it in the axonal model: Neuron_Dcurrent.hoc. Run the model to see the gradual modulation effect over seconds on spike shape.",
- "tags": [
- {
- "id": 727,
- "tag": "Action Potential Initiation"
- },
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1473,
- "tag": "ModelDB:135898"
- },
- {
- "id": 577,
- "tag": "NEURON"
- }
- ],
- "timestamp_created": "2024-01-12 09:34:56.923358+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/135898",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "990": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 990,
- "name": "High frequency oscillations in a hippocampal computational model (Stacey et al. 2009)",
- "repository_type": "github",
- "summary": "\"... Using a physiological computer model of hippocampus, we investigate random synaptic activity\r\n(noise) as a potential initiator of HFOs (high-frequency oscillations).\r\n\r\nWe explore parameters necessary to produce these oscillations and quantify the response\r\nusing the tools of stochastic resonance (SR) and coherence resonance\r\n(CR).\r\n... \r\n\r\nOur results show that, under normal coupling conditions, synaptic noise was able to produce\r\ngamma (30\u2013100 Hz) frequency oscillations.\r\n\r\n\r\nSynaptic noise generated HFOs in the ripple range (100\u2013200 Hz) when the network had\r\nparameters similar to pathological findings in epilepsy: increased gap\r\njunctions or recurrent synaptic connections, loss of inhibitory interneurons\r\nsuch as basket cells, and increased synaptic noise.\r\n\r\n...\r\nWe propose that increased synaptic noise and physiological coupling mechanisms are sufficient to generate gamma\r\noscillations and that pathologic changes in noise and coupling similar\r\nto those in epilepsy can produce abnormal ripples.\"\r\n",
- "tags": [
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1474,
- "tag": "ModelDB:135902"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- }
- ],
- "timestamp_created": "2024-01-12 09:34:57.462345+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/135902",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "991": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 991,
- "name": "Network recruitment to coherent oscillations in a hippocampal model (Stacey et al. 2011)",
- "repository_type": "github",
- "summary": "\"... Here we demonstrate, via a detailed computational model, a mechanism whereby physiological noise and coupling initiate oscillations and then recruit neighboring tissue, in a manner well described by a combination of Stochastic Resonance and Coherence Resonance.\r\n\r\n We develop a novel statistical method to quantify recruitment using several measures of network synchrony.\r\n\r\nThis measurement demonstrates that oscillations spread via preexisting network connections such as interneuronal connections, recurrent synapses, and gap junctions, provided that neighboring cells also receive sufficient inputs in the form of random synaptic noise.\r\n\r\n...\"\r\n",
- "tags": [
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1475,
- "tag": "ModelDB:135903"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- }
- ],
- "timestamp_created": "2024-01-12 09:34:57.999944+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/135903",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "992": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 992,
- "name": "Modelling enteric neuron populations and muscle fed-state motor patterns (Chambers et al. 2011)",
- "repository_type": "github",
- "summary": "\"After a meal, the gastrointestinal tract exhibits a set of behaviours known as the fed state.\r\n... Segmentation manifests as rhythmic local constrictions that do not propagate along the intestine.\r\n...\r\nWe investigated the enteric circuits that regulate segmentation focusing on a central feature of the ENS: a recurrent excitatory network of intrinsic sensory neurons (ISNs) which are characterized by prolonged after-hyperpolarizing potentials (AHPs) following their action potentials.\r\n...\"",
- "tags": [
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1476,
- "tag": "ModelDB:136024"
- },
- {
- "id": 824,
- "tag": "Simulink"
- }
- ],
- "timestamp_created": "2024-01-12 09:34:58.509614+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/136024",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "993": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 993,
- "name": "Functional structure of mitral cell dendritic tuft (Djurisic et al. 2008)",
- "repository_type": "github",
- "summary": "The computational modeling component of Djurisic et al. 2008 addressed two primary questions: whether amplification by active currents is necessary to explain the relatively mild attenuation suffered by tuft EPSPs spreading along the primary dendrite to the soma; what accounts for the relatively uniform peak EPSP amplitude throughout the tuft. These simulations show that passive spread from tuft to soma is sufficient to yield the low attenuation of tuft EPSPs, and that random distribution of a biologically plausible number of excitatory synapses throughout the tuft can produce the experimentally observed uniformity of depolarization.\r\n",
- "tags": [
- {
- "id": 579,
- "tag": "Active Dendrites"
- },
- {
- "id": 565,
- "tag": "Dendritic Action Potentials"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1477,
- "tag": "ModelDB:136026"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 588,
- "tag": "Olfaction"
- },
- {
- "id": 596,
- "tag": "Synaptic Integration"
- }
- ],
- "timestamp_created": "2024-01-12 09:34:59.112210+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/136026",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "994": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 994,
- "name": "Synaptic information transfer in computer models of neocortical columns (Neymotin et al. 2010)",
- "repository_type": "github",
- "summary": "\"...\r\nWe sought to measure how the activity of the network alters information flow from inputs to output patterns. \r\nInformation handling by the network reflected the degree of internal connectivity. ...\r\nWith greater connectivity strength, the recurrent network translated activity and information due to contribution of activity from intrinsic network dynamics. \r\n...\r\nAt still higher internal synaptic strength, the network corrupted the external information, producing a state where little external information came through.\r\nThe association of increased information retrieved from the network with increased gamma power supports the notion of gamma oscillations playing a role in information processing.\"\r\n",
- "tags": [
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 1478,
- "tag": "Information transfer"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1479,
- "tag": "ModelDB:136095"
- },
- {
- "id": 577,
- "tag": "NEURON"
- }
- ],
- "timestamp_created": "2024-01-12 09:34:59.714392+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/136095",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "995": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 995,
- "name": "Multiscale model of olfactory receptor neuron in mouse (Dougherty 2009)",
- "repository_type": "github",
- "summary": "Collection of XPP (.ode) files simulating the signal transduction (slow) and action potential (fast) currents in the olfactory receptor neuron of mouse. Collection contains model configured for dual odorant pulse delivery and model configured for prolonged odorant delivery. For those interested more in transduction processes, each whole cell recording model comes with a counter part file configured to show just the slow transduction current for ease of use and convenience. These transduction-only models typically run faster than the full multi-scale models but do not demonstrate action potentials.",
- "tags": [
- {
- "id": 727,
- "tag": "Action Potential Initiation"
- },
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 728,
- "tag": "Axonal Action Potentials"
- },
- {
- "id": 781,
- "tag": "G-protein coupled"
- },
- {
- "id": 1480,
- "tag": "I ANO2"
- },
- {
- "id": 766,
- "tag": "I CNG"
- },
- {
- "id": 780,
- "tag": "I Cl,Ca"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 861,
- "tag": "I_K,Na"
- },
- {
- "id": 817,
- "tag": "I_Na,Ca"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1481,
- "tag": "ModelDB:136097"
- },
- {
- "id": 866,
- "tag": "Multiscale"
- },
- {
- "id": 738,
- "tag": "Na/Ca exchanger"
- },
- {
- "id": 588,
- "tag": "Olfaction"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 568,
- "tag": "Parameter Fitting"
- },
- {
- "id": 751,
- "tag": "Signaling pathways"
- },
- {
- "id": 569,
- "tag": "Simplified Models"
- },
- {
- "id": 759,
- "tag": "XPPAUT"
- }
- ],
- "timestamp_created": "2024-01-12 09:35:00.391814+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/136097",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "996": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 996,
- "name": "Cerebellar Nucleus Neuron (Steuber, Schultheiss, Silver, De Schutter & Jaeger, 2010)",
- "repository_type": "github",
- "summary": "This is the GENESIS 2.3 implementation of a multi-compartmental deep cerebellar nucleus (DCN) neuron model with a full dendritic morphology and appropriate active conductances. We generated a good match of our simulations with DCN current clamp data we recorded in acute slices, including the heterogeneity in the rebound responses. We then examined how inhibitory and excitatory synaptic input interacted with these intrinsic conductances to control DCN firing. We found that the output spiking of the model reflected the ongoing balance of excitatory and inhibitory input rates and that changing the level of inhibition performed an additive operation. Rebound firing following strong Purkinje cell input bursts was also possible, but only if the chloride reversal potential was more negative than -70 mV to allow de-inactivation of rebound currents. Fast rebound bursts due to T-type calcium current and slow rebounds due to persistent sodium current could be differentially regulated by synaptic input, and the pattern of these rebounds was further influenced by HCN current. Our findings suggest that active properties of DCN neurons could play a crucial role for signal processing in the cerebellum.",
- "tags": [
- {
- "id": 579,
- "tag": "Active Dendrites"
- },
- {
- "id": 566,
- "tag": "Bursting"
- },
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 600,
- "tag": "GENESIS"
- },
- {
- "id": 739,
- "tag": "I Na,p"
- },
- {
- "id": 575,
- "tag": "I T low threshold"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 763,
- "tag": "Intrinsic plasticity"
- },
- {
- "id": 567,
- "tag": "Ion Channel Kinetics"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1482,
- "tag": "ModelDB:136175"
- },
- {
- "id": 791,
- "tag": "Rate-coding model neurons"
- },
- {
- "id": 573,
- "tag": "Rebound firing"
- },
- {
- "id": 596,
- "tag": "Synaptic Integration"
- }
- ],
- "timestamp_created": "2024-01-12 09:35:01.063451+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/136175",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- ],
- "default_context": "master",
- "id": 997,
- "name": "CA1 stratum radiatum interneuron multicompartmental model (Katona et al. 2011)",
- "repository_type": "github",
- "summary": "The model examines dendritic NMDA-spike generation and propagation\r\nin the dendrites of CA1 stratum radiatum interneurons. It contains\r\nNMDA-channels in a clustered pattern on a dendrite and K-channels. The\r\nsimulation shows the whole NMDA spike and the rising phase of the\r\ntraces in separate windows.\r\n",
- "tags": [
- {
- "id": 727,
- "tag": "Action Potential Initiation"
- },
- {
- "id": 579,
- "tag": "Active Dendrites"
- },
- {
- "id": 565,
- "tag": "Dendritic Action Potentials"
- },
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 576,
- "tag": "I K"
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- "id": 574,
- "tag": "I Na,t"
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- {
- "id": 564,
- "tag": "ModelDB"
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- "id": 1483,
- "tag": "ModelDB:136176"
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- "id": 577,
- "tag": "NEURON"
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- ],
- "timestamp_created": "2024-01-12 09:35:01.594931+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/136176",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "modeling"
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- "default_context": "master",
- "id": 998,
- "name": "Myelinated nerve fibre myelin resistance dependent on extracellular K+ level (Brazhe et al. 2010)",
- "repository_type": "github",
- "summary": "Excitation leads to rise in paranodal [K]e under the myelin. This causes structural changes in myelin structure and resistance. Current model aims to simulate this aspect. This is a space-clamped model of a double-cable nerve fibre.",
- "tags": [
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 591,
- "tag": "I K,leak"
- },
- {
- "id": 739,
- "tag": "I Na,p"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 783,
- "tag": "I_Ks"
- },
- {
- "id": 1484,
- "tag": "Intermittent block"
- },
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- "id": 1485,
- "tag": "Lua"
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- {
- "id": 564,
- "tag": "ModelDB"
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- "id": 1486,
- "tag": "ModelDB:136296"
- },
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- "id": 740,
- "tag": "Na/K pump"
- }
- ],
- "timestamp_created": "2024-01-12 09:35:02.124075+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/136296",
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- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
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- "name": "Wang-Buzsaki Interneuron (Talathi et al., 2010)",
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- "summary": "The submitted code provides the relevant C++ files, matlabfiles and the data files essential to reproduce the figures in the JCNS paper titled Control of neural synchrony using channelrhodopsin-2: A computational study.",
- "tags": [
- {
- "id": 755,
- "tag": "C or Cplusplus program"
- },
- {
- "id": 564,
- "tag": "ModelDB"
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- {
- "id": 1487,
- "tag": "ModelDB:136308"
- },
- {
- "id": 586,
- "tag": "Synchronization"
- }
- ],
- "timestamp_created": "2024-01-12 09:35:02.642225+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/136308",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "modeling"
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- "id": 1000,
- "name": "Neocort. pyramidal cells subthreshold somatic voltage controls spike propagation (Munro Kopell 2012)",
- "repository_type": "github",
- "summary": "There is suggestive evidence that pyramidal cell axons in neocortex may be coupled by gap junctions into an ``axonal plexus\" capable of generating Very Fast Oscillations (VFOs) with frequencies exceeding 80 Hz. It is not obvious, however, how a pyramidal cell in such a network could control its output when action potentials are free to propagate from the axons of other pyramidal cells into its own axon. We address this problem by means of simulations based on 3D reconstructions of pyramidal cells from rat somatosensory cortex. We show that somatic depolarization enables propagation via gap junctions into the initial segment and main axon, while somatic hyperpolarization disables it. We show further that somatic voltage cannot effectively control action potential propagation through gap junctions on minor collaterals; action potentials may therefore propagate freely from such collaterals regardless of somatic voltage. In previous work, VFOs are all but abolished during the hyperpolarization phase of slow-oscillations induced by anesthesia in vivo. This finding constrains the density of gap junctions on collaterals in our model and suggests that axonal sprouting due to cortical lesions may result in abnormally high gap junction density on collaterals, leading in turn to excessive VFO activity and hence to epilepsy via kindling.",
- "tags": [
- {
- "id": 728,
- "tag": "Axonal Action Potentials"
- },
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 469,
- "tag": "Epilepsy"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
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- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
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- "id": 1488,
- "tag": "ModelDB:136309"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- }
- ],
- "timestamp_created": "2024-01-12 09:35:03.178337+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/136309",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
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- "id": 1001,
- "name": "Modeling local field potentials (Bedard et al. 2004)",
- "repository_type": "github",
- "summary": "This demo simulates a model of local field potentials (LFP) with\r\nvariable resistivity. This model reproduces the low-pass\r\nfrequency filtering properties of extracellular potentials. The\r\nmodel considers inhomogeneous spatial profiles of conductivity\r\nand permittivity, which result from the multiple media (fluids,\r\nmembranes, vessels, ...) composing the extracellular space around\r\nneurons. Including non-constant profiles of conductivity enables\r\nthe model to display frequency filtering properties, ie slow\r\nevents such as EPSPs/IPSPs are less attenuated than fast events\r\nsuch as action potentials. The demo simulates Fig 6 of the\r\npaper.",
- "tags": [
- {
- "id": 734,
- "tag": "Extracellular Fields"
- },
- {
- "id": 564,
- "tag": "ModelDB"
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- "id": 1489,
- "tag": "ModelDB:136310"
- },
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- "id": 577,
- "tag": "NEURON"
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- ],
- "timestamp_created": "2024-01-12 09:35:03.677220+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/136310",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1002": {
- "auto_sync": true,
- "content_types": "modeling",
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- "modeling"
- ],
- "default_context": "master",
- "id": 1002,
- "name": "Globus pallidus neuron models with differing dendritic Na channel expression (Edgerton et al., 2010)",
- "repository_type": "github",
- "summary": "A set of 9 multi-compartmental rat GP neuron models (585 compartments) differing only in their expression of dendritic fast sodium channels were compared in their synaptic integration properties. Dendritic fast sodium channels were found to increase the importance of distal synapses (both excitatory AND inhibitory), increase spike timing variability with in vivo-like synaptic input, and make the model neurons highly sensitive to clustered synchronous excitation.",
- "tags": [
- {
- "id": 727,
- "tag": "Action Potential Initiation"
- },
- {
- "id": 579,
- "tag": "Active Dendrites"
- },
- {
- "id": 595,
- "tag": "Coincidence Detection"
- },
- {
- "id": 565,
- "tag": "Dendritic Action Potentials"
- },
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 600,
- "tag": "GENESIS"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 739,
- "tag": "I Na,p"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 570,
- "tag": "Influence of Dendritic Geometry"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1490,
- "tag": "ModelDB:136315"
- },
- {
- "id": 596,
- "tag": "Synaptic Integration"
- }
- ],
- "timestamp_created": "2024-01-12 09:35:04.188063+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/136315",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1003": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1003,
- "name": "Neural transformations on spike timing information (Tripp and Eliasmith 2007)",
- "repository_type": "github",
- "summary": "\" ... Here we employ computational methods to show that an ensemble\r\nof neurons firing at a constant mean rate can induce arbitrarily\r\nchosen temporal current patterns in postsynaptic cells. ...\"\r\n",
- "tags": [
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
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- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1491,
- "tag": "ModelDB:136380"
- },
- {
- "id": 720,
- "tag": "Temporal Pattern Generation"
- }
- ],
- "timestamp_created": "2024-01-12 09:35:05.229821+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/136380",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "1004": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1004,
- "name": "Action potential-evoked Na+ influx are similar in axon and soma (Fleidervish et al. 2010)",
- "repository_type": "github",
- "summary": "\"In cortical pyramidal neurons, the axon initial segment (AIS) is pivotal in synaptic integration.\r\n\r\nIt has been asserted that this is because there is a high density of Na+ channels in the AIS. \r\n\r\nHowever, we found that action potential-associated Na+ flux, as measured by high-speed fluorescence Na+ imaging, was about threefold larger in the rat AIS than in the soma. \r\n\r\nSpike-evoked Na+ flux in the AIS and the first node of Ranvier was similar and was eightfold lower in basal dendrites.\r\n\r\n...\r\nIn computer simulations, these data were consistent with the known features of action potential generation in these neurons.\"",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 579,
- "tag": "Active Dendrites"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1492,
- "tag": "ModelDB:136715"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 569,
- "tag": "Simplified Models"
- }
- ],
- "timestamp_created": "2024-01-12 09:35:05.847036+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/136715",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "1005": {
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- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1005,
- "name": "STDP allows fast rate-modulated coding with Poisson-like spike trains (Gilson et al. 2011)",
- "repository_type": "github",
- "summary": "The model demonstrates that a neuron equipped with STDP robustly detects repeating rate patterns among its afferents, from which the spikes are generated on the fly using inhomogenous Poisson sampling, provided those rates have narrow temporal peaks (10-20ms) - a condition met by many experimental Post-Stimulus Time Histograms (PSTH).",
- "tags": [
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 645,
- "tag": "Brian"
- },
- {
- "id": 595,
- "tag": "Coincidence Detection"
- },
- {
- "id": 1478,
- "tag": "Information transfer"
- },
- {
- "id": 825,
- "tag": "Learning"
- },
- {
- "id": 749,
- "tag": "Long-term Synaptic Plasticity"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1493,
- "tag": "ModelDB:136717"
- },
- {
- "id": 874,
- "tag": "Noise Sensitivity"
- },
- {
- "id": 719,
- "tag": "Pattern Recognition"
- },
- {
- "id": 620,
- "tag": "Python"
- },
- {
- "id": 802,
- "tag": "STDP"
- },
- {
- "id": 569,
- "tag": "Simplified Models"
- },
- {
- "id": 587,
- "tag": "Spatio-temporal Activity Patterns"
- },
- {
- "id": 725,
- "tag": "Synaptic Plasticity"
- },
- {
- "id": 803,
- "tag": "Unsupervised Learning"
- }
- ],
- "timestamp_created": "2024-01-12 09:35:06.420848+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/136717",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1006": {
- "auto_sync": true,
- "content_types": "modeling",
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- "modeling"
- ],
- "default_context": "master",
- "id": 1006,
- "name": "Single neuron with dynamic ion concentrations (Cressman et al. 2009)",
- "repository_type": "github",
- "summary": "These are the full and reduced models of a generic single neuron with dynamic ion concentrations as described in Cressman et al., Journal of Computational Neuroscience (2009) 26:159\u2013170.",
- "tags": [
- {
- "id": 566,
- "tag": "Bursting"
- },
- {
- "id": 755,
- "tag": "C or Cplusplus program"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1494,
- "tag": "ModelDB:136773"
- },
- {
- "id": 759,
- "tag": "XPPAUT"
- }
- ],
- "timestamp_created": "2024-01-12 09:35:06.943713+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/136773",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1007": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1007,
- "name": "Population models of temporal differentiation (Tripp and Eliasmith 2010)",
- "repository_type": "github",
- "summary": "\"Temporal derivatives are computed by a wide variety of neural circuits, but the problem of performing this computation accurately has received little theoretical study. \r\n\r\nHere we systematically compare the performance of diverse networks that calculate derivatives using cell-intrinsic adaptation and synaptic depression dynamics, feedforward network dynamics, and recurrent network dynamics. \r\n\r\nExamples of each type of network are compared by quantifying the errors they introduce into the calculation and their rejection of high-frequency input noise. \r\n...\"",
- "tags": [
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1495,
- "tag": "ModelDB:136799"
- },
- {
- "id": 678,
- "tag": "Nengo"
- },
- {
- "id": 569,
- "tag": "Simplified Models"
- },
- {
- "id": 720,
- "tag": "Temporal Pattern Generation"
- }
- ],
- "timestamp_created": "2024-01-12 09:35:07.461344+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/136799",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1008": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1008,
- "name": "Biophysically realistic neural modeling of the MEG mu rhythm (Jones et al. 2009)",
- "repository_type": "github",
- "summary": "\"Variations in cortical oscillations in the alpha (7\u201314 Hz) and beta (15\u201329 Hz) range have been correlated with attention, working memory, and stimulus detection. The mu rhythm recorded with magnetoencephalography (MEG) is a prominent oscillation generated by Rolandic cortex containing alpha and beta bands. Despite its prominence, the neural mechanisms regulating mu are unknown. We characterized the ongoing MEG mu rhythm from a localized source in the finger representation of primary somatosensory (SI) cortex. Subjects showed variation in the relative expression of mu-alpha or mu-beta, which were nonoverlapping for roughly 50% of their respective durations on single trials. To delineate the origins of this rhythm, a biophysically principled computational neural model of SI was developed, with distinct laminae, inhibitory and excitatory neurons, and feedforward (FF, representative of lemniscal thalamic drive) and feedback (FB, representative of higher-order cortical drive or input from nonlemniscal thalamic nuclei) inputs defined by the laminar location of their postsynaptic effects. ...\"",
- "tags": [
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 575,
- "tag": "I T low threshold"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1496,
- "tag": "ModelDB:136803"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 764,
- "tag": "Touch"
- }
- ],
- "timestamp_created": "2024-01-12 09:35:08.004856+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/136803",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1009": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1009,
- "name": "Democratic population decisions result in robust policy-gradient learning (Richmond et al. 2011)",
- "repository_type": "github",
- "summary": "This model demonstrates the use of GPU programming (with CUDA) to simulate a two-layer network of Integrate-and-Fire neurons with varying degrees of recurrent connectivity and to investigate its ability to learn a simplified navigation task using a learning rule stemming from Reinforcement Learning, a policy-gradient rule.",
- "tags": [
- {
- "id": 755,
- "tag": "C or Cplusplus program"
- },
- {
- "id": 825,
- "tag": "Learning"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1497,
- "tag": "ModelDB:136807"
- },
- {
- "id": 822,
- "tag": "Winner-take-all"
- }
- ],
- "timestamp_created": "2024-01-12 09:35:08.536087+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/136807",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1010": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1010,
- "name": "Parameter estimation for Hodgkin-Huxley based models of cortical neurons (Lepora et al. 2011)",
- "repository_type": "github",
- "summary": "Simulation and fitting of two-compartment (active soma, passive dendrite) \r\nfor different classes of cortical neurons. The fitting technique \r\nindirectly matches neuronal currents derived from somatic membrane \r\npotential data rather than fitting the voltage traces directly. \r\nThe method uses an analytic solution for the somatic ion channel \r\nmaximal conductances given approximate models of the channel kinetics, \r\nmembrane dynamics and dendrite. This approach is tested on model-derived \r\ndata for various cortical neurons. \r\n",
- "tags": [
- {
- "id": 600,
- "tag": "GENESIS"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 589,
- "tag": "I L high threshold"
- },
- {
- "id": 580,
- "tag": "I M"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 575,
- "tag": "I T low threshold"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1498,
- "tag": "ModelDB:136808"
- },
- {
- "id": 568,
- "tag": "Parameter Fitting"
- },
- {
- "id": 863,
- "tag": "Parameter sensitivity"
- },
- {
- "id": 569,
- "tag": "Simplified Models"
- }
- ],
- "timestamp_created": "2024-01-12 09:35:09.091935+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/136808",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1011": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1011,
- "name": "A model of unitary responses from A/C and PP synapses in CA3 pyramidal cells (Baker et al. 2010)",
- "repository_type": "github",
- "summary": "The model was used to reproduce experimentally determined mean synaptic response characteristics of unitary AMPA and NMDA synaptic stimulations in CA3 pyramidal cells with the objective of inferring the most likely response properties of the corresponding types of synapses. The model is primarily concerned with passive cells, but models of active dendrites are included.",
- "tags": [
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1499,
- "tag": "ModelDB:137259"
- },
- {
- "id": 577,
- "tag": "NEURON"
- }
- ],
- "timestamp_created": "2024-01-12 09:35:09.724964+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/137259",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1012": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1012,
- "name": "Effect of trp-like current on APs during exposure to sinusoidal voltage (Chen et al. 2010)",
- "repository_type": "github",
- "summary": "\"...\r\nPrevious work showed that magnetic electrical field-induced antinoceptive action is mediated by activation of capsaicin-sensitive sensory afferents. In this study, a modified Hodgkin-Huxley model, in which TRP-like current (I-TRP) was incorporated, was implemented to predict the firing behavior of action potentials (APs), as the model neuron was exposed to sinusoidal changes in externally-applied voltage. \r\n\r\n...\r\nOur simulation results suggest that modulation of TRP-like channels functionally expressed in small-diameter peripheral sensory neurons should be an important mechanism through which it can contribute to the firing pattern of APs.\"",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 1500,
- "tag": "I trp"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1501,
- "tag": "ModelDB:137263"
- },
- {
- "id": 569,
- "tag": "Simplified Models"
- },
- {
- "id": 732,
- "tag": "Tutorial/Teaching"
- },
- {
- "id": 759,
- "tag": "XPPAUT"
- }
- ],
- "timestamp_created": "2024-01-12 09:35:10.337127+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/137263",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1013": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1013,
- "name": "Striatal GABAergic microcircuit, spatial scales of dynamics (Humphries et al, 2010)",
- "repository_type": "github",
- "summary": "The main thrust of this paper was the development of the 3D anatomical network of the striatum's GABAergic microcircuit. We grew dendrite and axon models for the MSNs and FSIs and extracted probabilities for the presence of these neurites as a function of distance from the soma. From these, we found the probabilities of intersection between the neurites of two neurons given their inter-somatic distance, and used these to construct three-dimensional striatal networks. These networks were examined for their predictions for the distributions of the numbers and distances of connections for all the connections in the microcircuit. We then combined the neuron models from a previous model (Humphries et al, 2009; ModelDB ID: 128874) with the new anatomical model. We used this new complete striatal model to examine the impact of the anatomical network on the firing properties of the MSN and FSI populations, and to study the influence of all the inputs to one MSN within the network.",
- "tags": [
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 855,
- "tag": "Connectivity matrix"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1502,
- "tag": "ModelDB:137502"
- },
- {
- "id": 587,
- "tag": "Spatio-temporal Activity Patterns"
- },
- {
- "id": 822,
- "tag": "Winner-take-all"
- }
- ],
- "timestamp_created": "2024-01-12 09:35:10.866522+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/137502",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1014": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1014,
- "name": "Model of long range transmission of gamma oscillation (Murray 2007)",
- "repository_type": "github",
- "summary": "\"...\r\nA minimal mathematical model was developed for a\r\npreliminary study of long-range neural transmission of gamma\r\noscillation from the CA3 to the entorhinal cortex via the CAI\r\nregion of the hippocampus, a subset within a larger complex set of\r\npathways. A module was created for each local population of\r\nneurons with common intrinsic properties and connectivity to\r\nsimplify the connection process and make the model more flexible.\r\nThree modules were created using MATLAB Simulink\u00ae and tested\r\nto confirm that they transmit gamma through the system. The\r\nmodel also revealed that a portion of the signal from CAI to the\r\nentorhinal cortex may be lost in transmission under certain\r\nconditions.\"",
- "tags": [
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1503,
- "tag": "ModelDB:137505"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 569,
- "tag": "Simplified Models"
- }
- ],
- "timestamp_created": "2024-01-12 09:35:11.387996+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/137505",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1015": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1015,
- "name": "Sensory feedback in an oscillatory interference model of place cell activity (Monaco et al. 2011)",
- "repository_type": "github",
- "summary": "Many animals use a form of dead reckoning known as 'path integration' to maintain a sense of their location as they explore the world. However, internal motion signals and the neural activity that integrates them can be noisy, leading inevitably to inaccurate position estimates. The rat hippocampus and entorhinal cortex support a flexible system of spatial representation that is critical to spatial learning and memory. The position signal encoded by this system is thought to rely on path integration, but it must be recalibrated by familiar landmarks to maintain accuracy. To explore the interaction between path integration and external landmarks, we present a model of hippocampal activity based on the interference of theta-frequency oscillations that are modulated by realistic animal movements around a track. We show that spatial activity degrades with noise, but introducing external cues based on direct sensory feedback can prevent this degradation. When these cues are put into conflict with each other, their interaction produces a diverse array of response changes that resembles experimental observations. Feedback driven by attending to landmarks may be critical to navigation and spatial memory in mammals.",
- "tags": [
- {
- "id": 1466,
- "tag": "Envelope synthesis"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1504,
- "tag": "ModelDB:137676"
- },
- {
- "id": 874,
- "tag": "Noise Sensitivity"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 1505,
- "tag": "Phase interference"
- },
- {
- "id": 799,
- "tag": "Place cell/field"
- },
- {
- "id": 620,
- "tag": "Python"
- },
- {
- "id": 791,
- "tag": "Rate-coding model neurons"
- },
- {
- "id": 569,
- "tag": "Simplified Models"
- },
- {
- "id": 587,
- "tag": "Spatio-temporal Activity Patterns"
- },
- {
- "id": 586,
- "tag": "Synchronization"
- }
- ],
- "timestamp_created": "2024-01-12 09:35:12.065085+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/137676",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1016": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1016,
- "name": "Laminar analysis of excitatory circuits in vibrissal motor and sensory cortex (Hooks et al. 2011)",
- "repository_type": "github",
- "summary": "\"...\r\nWe mapped local excitatory pathways in each area (primary motor cortex (vM1), primary somatosensory cortex (vS1;\r\nbarrel cortex), and secondary somatosensory cortex (S2)) across all cortical layers using glutamate uncaging and laser scanning photostimulation. \r\n\r\nWe analyzed these maps to derive laminar connectivity matrices describing the average strengths of pathways between individual neurons in\r\ndifferent layers and between entire cortical layers. ...\"",
- "tags": [
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 855,
- "tag": "Connectivity matrix"
- },
- {
- "id": 856,
- "tag": "Laminar Connectivity"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1506,
- "tag": "ModelDB:137743"
- },
- {
- "id": 764,
- "tag": "Touch"
- },
- {
- "id": 1507,
- "tag": "Whisking"
- }
- ],
- "timestamp_created": "2024-01-12 09:35:12.747464+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/137743",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1017": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1017,
- "name": "CA1 pyramidal: Stochastic amplification of KCa in Ca2+ microdomains (Stanley et al. 2011)",
- "repository_type": "github",
- "summary": "This minimal model investigates stochastic amplification of calcium-activated potassium (KCa) currents. Amplification results from calcium being released in short high amplitude pulses associated with the stochastic gating of calcium channels in microdomains. This model predicts that such pulsed release of calcium significantly increases subthreshold SK2 currents above what would be produced by standard deterministic models. However, there is little effect on a simple sAHP current kinetic scheme. This suggests that calcium stochasticity and microdomains should be considered when modeling certain KCa currents near subthreshold conditions.",
- "tags": [
- {
- "id": 579,
- "tag": "Active Dendrites"
- },
- {
- "id": 572,
- "tag": "Calcium dynamics"
- },
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 1433,
- "tag": "I_AHP"
- },
- {
- "id": 567,
- "tag": "Ion Channel Kinetics"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 748,
- "tag": "Markov-type model"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1508,
- "tag": "ModelDB:137745"
- },
- {
- "id": 874,
- "tag": "Noise Sensitivity"
- }
- ],
- "timestamp_created": "2024-01-12 09:35:13.269238+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/137745",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1018": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1018,
- "name": "Spike exchange methods for a Blue Gene/P supercomputer (Hines et al., 2011)",
- "repository_type": "github",
- "summary": "Tests several spike exchange methods on a Blue Gene/P supercomputer on up to 64K cores.",
- "tags": [
- {
- "id": 756,
- "tag": "Methods"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1509,
- "tag": "ModelDB:137845"
- },
- {
- "id": 577,
- "tag": "NEURON"
- }
- ],
- "timestamp_created": "2024-01-12 09:35:13.908061+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/137845",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1019": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1019,
- "name": "GP Neuron, somatic and dendritic phase response curves (Schultheiss et al. 2011)",
- "repository_type": "github",
- "summary": "Phase response analysis of a GP neuron model showing type I PRCs for somatic inputs and type II PRCs for dendritic excitation. Analysis of intrinsic currents underlying type II dendritic PRCs.",
- "tags": [
- {
- "id": 579,
- "tag": "Active Dendrites"
- },
- {
- "id": 600,
- "tag": "GENESIS"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1510,
- "tag": "ModelDB:137846"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 801,
- "tag": "Parkinson's"
- },
- {
- "id": 823,
- "tag": "Phase Response Curves"
- },
- {
- "id": 596,
- "tag": "Synaptic Integration"
- },
- {
- "id": 586,
- "tag": "Synchronization"
- }
- ],
- "timestamp_created": "2024-01-12 09:35:14.704094+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/137846",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1020": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1020,
- "name": "Vectorized algorithms for spiking neural network simulation (Brette and Goodman 2011)",
- "repository_type": "github",
- "summary": "\"... We describe a set of algorithms to simulate large spiking neural networks\r\nefficiently with high-level languages using vector-based operations.\r\nThese algorithms constitute the core of Brian, a spiking neural network\r\nsimulator written in the Python language. Vectorized simulation makes\r\nit possible to combine the flexibility of high-level languages with the\r\ncomputational efficiency usually associated with compiled languages.\"",
- "tags": [
- {
- "id": 1511,
- "tag": "Brian (web link to method)"
- },
- {
- "id": 756,
- "tag": "Methods"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1512,
- "tag": "ModelDB:137989"
- },
- {
- "id": 853,
- "tag": "Python (web link to model)"
- }
- ],
- "timestamp_created": "2024-01-12 09:35:15.231214+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/137989",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1021": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1021,
- "name": "HMM of Nav1.7 WT and F1449V (Gurkiewicz et al. 2011)",
- "repository_type": "github",
- "summary": "Neuron mod files for the WT and F1449V Na+ currents from the paper:\r\nKinetic Modeling of Nav1.7 Provides Insight Into Erythromelalgia-associated F1449V Mutation\r\nM. Gurkiewicz, A. Korngreen, S. Waxman, and A. Lampert. J.Neurophysiol. (2011).\r\n\r\nThe parameters for the K65, K53 and K63 transitions were derived from microscopic reversibility relationships in the model.",
- "tags": [
- {
- "id": 1513,
- "tag": "Erythromelalgia"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1514,
- "tag": "ModelDB:138082"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 775,
- "tag": "Nociception"
- }
- ],
- "timestamp_created": "2024-01-12 09:35:15.757577+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/138082",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1022": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1022,
- "name": "CA1 pyramidal neuron: schizophrenic behavior (Migliore et al. 2011)",
- "repository_type": "github",
- "summary": "NEURON files from the paper: A modeling study suggesting how a reduction in the context-dependent input on CA1 pyramidal neurons could generate schizophrenic behavior. by M. Migliore, I. De Blasi, D. Tegolo, R. Migliore, Neural Networks,(2011), doi:10.1016/j.neunet.2011.01.001. Starting from the experimentally supported assumption on hippocampal neurons we explore an experimentally testable prediction at the single neuron level. The model shows how and to what extent a pathological hypofunction of a contextdependent distal input on a CA1 neuron can generate hallucinations by altering the normal recall of objects on which the neuron has been previously tuned. The results suggest that a change in the context during the recall phase may cause an occasional but very significant change in the set of active dendrites used for features recognition, leading to a distorted perception of objects.",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 579,
- "tag": "Active Dendrites"
- },
- {
- "id": 595,
- "tag": "Coincidence Detection"
- },
- {
- "id": 565,
- "tag": "Dendritic Action Potentials"
- },
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 1515,
- "tag": "Hallucinations"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 570,
- "tag": "Influence of Dendritic Geometry"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1516,
- "tag": "ModelDB:138205"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 845,
- "tag": "Schizophrenia"
- },
- {
- "id": 596,
- "tag": "Synaptic Integration"
- }
- ],
- "timestamp_created": "2024-01-12 09:35:16.279069+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/138205",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1023": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1023,
- "name": "Stochastic 3D model of neonatal rat spinal motoneuron (Ostroumov 2007)",
- "repository_type": "github",
- "summary": "\" ... Although existing models of motoneurons have indicated the distributed role of certain conductances in\r\nregulating firing, it is unclear how the spatial distribution of certain currents is ultimately shaping motoneuron output. \r\n\r\nThus, it would be helpful to\r\nbuild a bridge between histological and electrophysiological data. \r\n\r\nThe present report is based on the construction of a 3D motoneuron model based\r\non available parameters applicable to the neonatal spinal cord. ...\"",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 579,
- "tag": "Active Dendrites"
- },
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 570,
- "tag": "Influence of Dendritic Geometry"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1517,
- "tag": "ModelDB:138273"
- },
- {
- "id": 577,
- "tag": "NEURON"
- }
- ],
- "timestamp_created": "2024-01-12 09:35:16.860525+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/138273",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1024": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1024,
- "name": "Mechanisms of magnetic stimulation of central nervous system neurons (Pashut et al. 2011)",
- "repository_type": "github",
- "summary": "Transcranial magnetic stimulation (TMS) is a widely applied tool for probing cognitive function in humans and is one of the best tools for clinical treatments and interfering with cognitive tasks. Surprisingly, while TMS has been commercially available for decades, the cellular mechanisms underlying magnetic stimulation remain unclear. Here we investigate these mechanisms using compartmental modeling. We generated a numerical scheme allowing simulation of the physiological response to magnetic stimulation of neurons with arbitrary morphologies and active properties. Computational experiments using this scheme suggested that TMS affects neurons in the central nervous system (CNS) primarily by somatic stimulation.",
- "tags": [
- {
- "id": 727,
- "tag": "Action Potential Initiation"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 1518,
- "tag": "Magnetic stimulation"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1519,
- "tag": "ModelDB:138321"
- },
- {
- "id": 577,
- "tag": "NEURON"
- }
- ],
- "timestamp_created": "2024-01-12 09:35:17.390665+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/138321",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1025": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1025,
- "name": "Emergence of physiological oscillation frequencies in neocortex simulations (Neymotin et al. 2011)",
- "repository_type": "github",
- "summary": "\"Coordination of neocortical oscillations has been hypothesized to underlie the \"binding\" essential to cognitive function.\r\n\r\nHowever, the mechanisms that generate neocortical oscillations in physiological frequency bands remain unknown.\r\n\r\nWe hypothesized that interlaminar relations in neocortex would provide multiple intermediate loops that would play particular roles in generating oscillations, adding different dynamics to the network.\r\n\r\nWe simulated networks from sensory neocortex using 9 columns of event-driven rule-based neurons wired according to anatomical data and driven with random white-noise synaptic inputs.\r\n...\"",
- "tags": [
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 856,
- "tag": "Laminar Connectivity"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1520,
- "tag": "ModelDB:138379"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 586,
- "tag": "Synchronization"
- }
- ],
- "timestamp_created": "2024-01-12 09:35:17.925238+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/138379",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1026": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1026,
- "name": "Controlling KCa channels with different Ca2+ buffering models in Purkinje cell (Anwar et al. 2012)",
- "repository_type": "github",
- "summary": "In this work, we compare the dynamics of different buffering models during generation of a dendritic Ca2+ spike in a single compartment model of a Purkinje cell dendrite. The Ca2+ buffering models used are 1) a single Ca2+ pool, 2) two Ca2+ pools respectively for the fast and slow transients, 3) a detailed calcium model with buffers, pump (Schmidt et al., 2003), and diffusion and 4) a calcium model with buffers, pump and diffusion compensation. The parameters of single pool and double pool are tuned, using Neurofitter (Van Geit et al., 2007), to approximate the behavior of detailed calcium dynamics over range of 0.5 \u00c2\u00b5M to 8 \u00c2\u00b5M of intracellular calcium. The diffusion compensation is modeled using a buffer-like mechanism called DCM. To use DCM robustly for different diameter compartments, its parameters are estimated, using Neurofitter (Van Geit et al., 2007), as a function of compartment diameter (0.8 \u00c2\u00b5m-20 \u00c2\u00b5m).",
- "tags": [
- {
- "id": 572,
- "tag": "Calcium dynamics"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1521,
- "tag": "ModelDB:138382"
- },
- {
- "id": 577,
- "tag": "NEURON"
- }
- ],
- "timestamp_created": "2024-01-12 09:35:18.439438+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/138382",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1027": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 1027,
- "name": "Gamma and theta rythms in biophysical models of hippocampus circuits (Kopell et al. 2011)",
- "repository_type": "github",
- "summary": "\" ... the main rhythms displayed by the hippocampus, the gamma (30\u201390 Hz) and theta (4\u201312 Hz) rhythms. We concentrate on modeling\r\nin vitro experiments, but with an eye toward possible in vivo implications. ...\r\nWe use simpler biophysical models; all cells have a single compartment only, and the\r\ninterneurons are restricted to two types: fast-spiking (FS) basket cells and oriens\r\nlacunosum-moleculare (O-LM) cells. \r\n... , we aim not so much at reproducing dynamics in great detail, but at clarifying the essential mechanisms underlying the production of the rhythms and their interactions (Kopell, 2005). ...\"\r\n",
- "tags": [
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 767,
- "tag": "MATLAB (web link to model)"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1522,
- "tag": "ModelDB:138421"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- }
- ],
- "timestamp_created": "2024-01-12 09:35:18.976401+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/138421",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1028": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 1028,
- "name": "Prefrontal\u2013striatal Parkinsons comp. model of multicue category learning (Moustafa and Gluck 2011)",
- "repository_type": "github",
- "summary": "\"...\r\nIn this\r\nmodel, PFC dopamine is key for attentional learning, whereas\r\nbasal ganglia dopamine, consistent with other models, is key for\r\nreinforcement and motor learning.\r\n\r\nThe model assumes that competitive\r\ndynamics among PFC neurons is the neural mechanism\r\nunderlying stimulus selection with limited attentional resources,\r\nwhereas competitive dynamics among striatal neurons is the\r\nneural mechanism underlying action selection. \r\n\r\nAccording to our\r\nmodel, PD is associated with decreased phasic and tonic dopamine\r\nlevels in both PFC and basal ganglia. \r\n...\"",
- "tags": [
- {
- "id": 767,
- "tag": "MATLAB (web link to model)"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1523,
- "tag": "ModelDB:138631"
- },
- {
- "id": 801,
- "tag": "Parkinson's"
- }
- ],
- "timestamp_created": "2024-01-12 09:35:19.569473+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/138631",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1029": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 1029,
- "name": "A neurocomputational model of classical conditioning phenomena (Moustafa et al. 2009)",
- "repository_type": "github",
- "summary": "\"... Here, we show that the same information-processing function proposed\r\nfor the hippocampal region in the Gluck and Myers (1993) model can also be implemented in\r\na network without using the backpropagation algorithm. Instead, our newer instantiation of\r\nthe theory uses only (a) Hebbian learning methods which match more closely with synaptic\r\nand associative learning mechanisms ascribed to the hippocampal region and (b) a more\r\nplausible representation of input stimuli. \r\nWe demonstrate here that this new more\r\nbiologically plausible model is able to simulate various behavioral effects, including latent\r\ninhibition, acquired equivalence, sensory preconditioning, negative patterning, and context\r\nshift effects. \r\n...\"",
- "tags": [
- {
- "id": 825,
- "tag": "Learning"
- },
- {
- "id": 767,
- "tag": "MATLAB (web link to model)"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1524,
- "tag": "ModelDB:138634"
- },
- {
- "id": 758,
- "tag": "Sensory processing"
- }
- ],
- "timestamp_created": "2024-01-12 09:35:20.058525+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/138634",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1030": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1030,
- "name": "Stochastic versions of the Hodgkin-Huxley equations (Goldwyn, Shea-Brown 2011)",
- "repository_type": "github",
- "summary": "A Matlab gui for simulating different channel noise models using the Hodgkin-Huxley equations. Methods provided and reviewed in Goldwyn and Shea-Brown (2011) are: current noise, subunit noise, conductance noise, and Markov chain, as well as the standard deterministic Hodgkin-Huxley model.",
- "tags": [
- {
- "id": 727,
- "tag": "Action Potential Initiation"
- },
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 567,
- "tag": "Ion Channel Kinetics"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 748,
- "tag": "Markov-type model"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1525,
- "tag": "ModelDB:138950"
- }
- ],
- "timestamp_created": "2024-01-12 09:35:20.563411+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/138950",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1031": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1031,
- "name": "Modular grid cell responses as a basis for hippocampal remapping (Monaco and Abbott 2011)",
- "repository_type": "github",
- "summary": "\"Hippocampal place fields, the local regions of activity recorded from place cells in exploring rodents, can undergo large changes in relative\r\nlocation during remapping.\r\n\r\nThis process would appear to require some form of modulated global input.\r\n\r\nGrid-cell responses recorded from layer II of medial entorhinal cortex in rats have been observed to realign concurrently with hippocampal remapping, making them a candidate input source.\r\n\r\nHowever, this realignment occurs coherently across colocalized ensembles of grid cells (Fyhn et al., 2007).\r\n\r\nThe hypothesized entorhinal contribution to remapping depends on whether this coherence extends to all grid cells, which is currently\r\nunknown.\r\n\r\nWe study whether dividing grid cells into small numbers of independently realigning modules can both account for this\r\nlocalized coherence and allow for hippocampal remapping.\r\n...\"",
- "tags": [
- {
- "id": 855,
- "tag": "Connectivity matrix"
- },
- {
- "id": 1461,
- "tag": "Grid cell"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1526,
- "tag": "ModelDB:138951"
- },
- {
- "id": 719,
- "tag": "Pattern Recognition"
- },
- {
- "id": 799,
- "tag": "Place cell/field"
- },
- {
- "id": 620,
- "tag": "Python"
- },
- {
- "id": 791,
- "tag": "Rate-coding model neurons"
- },
- {
- "id": 569,
- "tag": "Simplified Models"
- },
- {
- "id": 587,
- "tag": "Spatio-temporal Activity Patterns"
- }
- ],
- "timestamp_created": "2024-01-12 09:35:21.086665+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/138951",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1032": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1032,
- "name": "A Neural mass computational model of the Thalamocorticothalamic circuitry (Bhattacharya et al. 2011)",
- "repository_type": "github",
- "summary": "The model presented here is a bio-physically plausible version of a simple thalamo-cortical neural mass computational model proposed by Lopes da Silva in 1974 to simulate brain EEG activity within the alpha band (8-13 Hz). The thalamic and cortical circuitry are presented as separate modules in this model with cell populations as in biology. The connectivity between cell populations are as reported by Sherman, S. in Scholarpedia, 2006. The values of the synaptic connectivity parameters are as reported by Van Horn et al, 2000. In our paper (doi:10.1016/j.neunet.2011.02.009), we study the model behaviour while varying the values of the synaptic connectivity parameters (Cyyy) in the model about their respective 'basal' (intial) values.",
- "tags": [
- {
- "id": 827,
- "tag": "Aging/Alzheimer`s"
- },
- {
- "id": 1527,
- "tag": "Brain Rhythms"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1528,
- "tag": "ModelDB:138970"
- },
- {
- "id": 824,
- "tag": "Simulink"
- }
- ],
- "timestamp_created": "2024-01-12 09:35:21.595559+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/138970",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1033": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1033,
- "name": "Interacting synaptic conductances during, distorting, voltage clamp (Poleg-Polsky and Diamond 2011)",
- "repository_type": "github",
- "summary": "This simulation examines the accuracy of the voltage clamp technique\r\nin detecting the excitatory and the inhibitory components of the\r\nsynaptic drive.",
- "tags": [
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 721,
- "tag": "I N"
- },
- {
- "id": 570,
- "tag": "Influence of Dendritic Geometry"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1529,
- "tag": "ModelDB:139150"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 596,
- "tag": "Synaptic Integration"
- }
- ],
- "timestamp_created": "2024-01-12 09:35:22.132471+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/139150",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1034": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1034,
- "name": "Single neuron with ion concentrations to model anoxic depolarization (Zandt et al. 2011)",
- "repository_type": "github",
- "summary": "A minimal single neuron model, including changing ion concentrations and homeostasis mechanisms. It shows the sudden depolarization that occurs after prolonged anoxia/ischemia.",
- "tags": [
- {
- "id": 1530,
- "tag": "Anoxic depolarization"
- },
- {
- "id": 1531,
- "tag": "I Cl, leak"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 591,
- "tag": "I K,leak"
- },
- {
- "id": 1532,
- "tag": "I Na, leak"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1533,
- "tag": "ModelDB:139266"
- },
- {
- "id": 740,
- "tag": "Na/K pump"
- }
- ],
- "timestamp_created": "2024-01-12 09:35:22.643451+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/139266",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1035": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1035,
- "name": "A spatially extended model for macroscopic spike-wave discharges (Taylor and Baier 2011)",
- "repository_type": "github",
- "summary": "A spatially extended neural field model for generating spike-wave based on the Amari (1977) model implemented in MATLAB.",
- "tags": [
- {
- "id": 1527,
- "tag": "Brain Rhythms"
- },
- {
- "id": 566,
- "tag": "Bursting"
- },
- {
- "id": 469,
- "tag": "Epilepsy"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1534,
- "tag": "ModelDB:139296"
- }
- ],
- "timestamp_created": "2024-01-12 09:35:23.258097+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/139296",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1036": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1036,
- "name": "Bursting respiratory net: clustered architecture gives large phase diff`s (Fietkiewicz et al 2011)",
- "repository_type": "github",
- "summary": "Using a previous model of respiratory rhythm generation, we modified the network architecture such that cells can be segregated into two clusters. Cells within a given cluster burst with smaller phase differences than do cells from different clusters. This may explain the large phase differences seen experimentally, as reported in the paper.",
- "tags": [
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 566,
- "tag": "Bursting"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1535,
- "tag": "ModelDB:139418"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 1536,
- "tag": "Respiratory control"
- }
- ],
- "timestamp_created": "2024-01-12 09:35:23.757723+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/139418",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1037": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1037,
- "name": "Ketamine disrupts theta modulation of gamma in a computer model of hippocampus (Neymotin et al 2011)",
- "repository_type": "github",
- "summary": "\"Abnormalities in oscillations have been suggested to play a role in schizophrenia. \r\n\r\nWe studied theta-modulated gamma oscillations in a computer model of hippocampal CA3 in vivo with and\r\nwithout simulated application of ketamine, an NMDA receptor antagonist and psychotomimetic.\r\n\r\nNetworks of 1200 multi-compartment neurons (pyramidal, basket and oriens-lacunosum moleculare,\r\nOLM, cells) generated theta and gamma oscillations from intrinsic network dynamics: basket cells\r\nprimarily generated gamma and amplified theta, while OLM cells strongly contributed to theta.\r\n...\"",
- "tags": [
- {
- "id": 1527,
- "tag": "Brain Rhythms"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 589,
- "tag": "I L high threshold"
- },
- {
- "id": 1478,
- "tag": "Information transfer"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1537,
- "tag": "ModelDB:139421"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 787,
- "tag": "Pathophysiology"
- },
- {
- "id": 620,
- "tag": "Python"
- },
- {
- "id": 845,
- "tag": "Schizophrenia"
- },
- {
- "id": 586,
- "tag": "Synchronization"
- },
- {
- "id": 746,
- "tag": "Therapeutics"
- }
- ],
- "timestamp_created": "2024-01-12 09:35:24.295379+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/139421",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1038": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 1038,
- "name": "Mathematics for Neuroscientists (Gabbiani and Cox 2010)",
- "repository_type": "github",
- "summary": "This textbook provides a good source for learning the mathematics relevant to computational neuroscience and also the neuroscience itself. There are 232 computer code examples from the book available through the http://www.elsevierdirect.com/companions/9780123748829/pictures/code/index.html code link here and in the below page copied from the books companion web site.",
- "tags": [
- {
- "id": 767,
- "tag": "MATLAB (web link to model)"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1538,
- "tag": "ModelDB:139457"
- },
- {
- "id": 732,
- "tag": "Tutorial/Teaching"
- }
- ],
- "timestamp_created": "2024-01-12 09:35:24.958125+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/139457",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1039": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1039,
- "name": "L5b PC model constrained for BAC firing and perisomatic current step firing (Hay et al., 2011)",
- "repository_type": "github",
- "summary": "\"...\r\nL5b pyramidal cells have been the subject of extensive experimental and modeling studies, yet conductance-based models of these cells that faithfully reproduce both their perisomatic Na+-spiking behavior as well as key dendritic active properties, including Ca2+ spikes and back-propagating action potentials, are still lacking.\r\n\r\nBased on a large body of experimental recordings from both the soma and dendrites of L5b pyramidal cells in adult rats, we characterized key features of the somatic and dendritic firing and quantified their statistics.\r\n\r\nWe used these features to constrain the density of a set of ion channels over the soma and dendritic surface via multi-objective optimization with an evolutionary algorithm, thus generating a set of detailed conductance-based models that faithfully replicate the back-propagating action potential activated Ca2+ spike firing and the perisomatic firing response to current steps, as well as the experimental variability of the properties.\r\n...\r\nThe models we present provide several experimentally-testable predictions and can serve as a powerful tool for theoretical investigations of the contribution of single-cell dynamics to network activity and its computational capabilities.\r\n\"",
- "tags": [
- {
- "id": 579,
- "tag": "Active Dendrites"
- },
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 730,
- "tag": "I A, slow"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 589,
- "tag": "I L high threshold"
- },
- {
- "id": 580,
- "tag": "I M"
- },
- {
- "id": 739,
- "tag": "I Na,p"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 575,
- "tag": "I T low threshold"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1539,
- "tag": "ModelDB:139653"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 568,
- "tag": "Parameter Fitting"
- }
- ],
- "timestamp_created": "2024-01-12 09:35:25.648455+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/139653",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1040": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1040,
- "name": "Frog second-order vestibular neuron models (Rossert et al. 2011)",
- "repository_type": "github",
- "summary": "This implements spiking Hodgkin-Huxley type models of tonic and phasic second-order vestibular neurons. Models fitted to intracellular spike and membrane potential recordings from frog (Rana temporaria). The models can be stimulated by intracellular step current, frequency current (ZAP) or synaptic stimulation.",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 575,
- "tag": "I T low threshold"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1540,
- "tag": "ModelDB:139654"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 758,
- "tag": "Sensory processing"
- },
- {
- "id": 569,
- "tag": "Simplified Models"
- },
- {
- "id": 753,
- "tag": "Vestibular"
- }
- ],
- "timestamp_created": "2024-01-12 09:35:26.215517+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/139654",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1041": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1041,
- "name": "Hippocampus CA1: Simulations of LTP signaling pathways (Kim M et al. 2011)",
- "repository_type": "github",
- "summary": "This is a multi-compartmental, stochastic version of the Kim et al. 2010 paper. There are a few additional reactions, and some of the rate constants have been updated. It addresses the role of molecule anchoring in PKA dependent hippocampal LTP.\r\n",
- "tags": [
- {
- "id": 749,
- "tag": "Long-term Synaptic Plasticity"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1541,
- "tag": "ModelDB:139655"
- },
- {
- "id": 1542,
- "tag": "NeuroRD"
- },
- {
- "id": 751,
- "tag": "Signaling pathways"
- }
- ],
- "timestamp_created": "2024-01-12 09:35:26.724441+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/139655",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1042": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1042,
- "name": "Cerebellar cortex oscil. robustness from Golgi cell gap jncs (Simoes de Souza and De Schutter 2011)",
- "repository_type": "github",
- "summary": "\" ... Previous one-dimensional network modeling of the cerebellar granular layer has been successfully\r\nlinked with a range of cerebellar cortex oscillations observed in vivo. However, the recent discovery of gap\r\njunctions between Golgi cells (GoCs), which may cause oscillations by themselves, has raised the question of how\r\ngap-junction coupling affects GoC and granular-layer oscillations. To investigate this question, we developed a\r\nnovel two-dimensional computational model of the GoC-granule cell (GC) circuit with and without gap junctions\r\nbetween GoCs. ...\"",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1543,
- "tag": "ModelDB:139656"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 586,
- "tag": "Synchronization"
- }
- ],
- "timestamp_created": "2024-01-12 09:35:27.228263+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/139656",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1043": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1043,
- "name": "Superior paraolivary nucleus neuron (Kopp-Scheinpflug et al. 2011)",
- "repository_type": "github",
- "summary": "This is a model of neurons in the brainstem superior paraolivary nucleus (SPN), which produce very salient offset firing during sound stimulation. Rebound offset firing is triggered by IPSPs coming from the medial nucleus of the trapezoid body (MNTB). This model shows that AP firing can emerge from inhibition through integration of large IPSPs, driven by an\r\nextremely negative chloride reversal potential, combined with a large hyperpolarization-\r\nactivated non-specific cationic current (IH), with a secondary contribution from a T-type calcium conductance (ITCa). As a result, tiny gaps in sound stimuli of just 3-4ms can elicit reliable APs that signal such brief offsets.",
- "tags": [
- {
- "id": 727,
- "tag": "Action Potential Initiation"
- },
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 575,
- "tag": "I T low threshold"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1544,
- "tag": "ModelDB:139657"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 573,
- "tag": "Rebound firing"
- }
- ],
- "timestamp_created": "2024-01-12 09:35:27.772003+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/139657",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1044": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1044,
- "name": "Model of peristalsis in the dorsal blood vessel of Lumbriculus variegatus (Halfmann and Crisp 2011)",
- "repository_type": "github",
- "summary": "The blackworm, Lumbriculus variegatus, has a segmented dorsal blood vessel that acts as a peristaltic pump to move blood through its closed circulatory system. Here, we conducted a kinematic study using videography and computational modeling as a first step toward understanding the control of DBV pulsation. A simple feed-forward system of distributed, coupled neuronal oscillators is a sufficient model was a sufficient model to explain the control of pulsation in the blackworm.",
- "tags": [
- {
- "id": 729,
- "tag": "Invertebrate"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1545,
- "tag": "ModelDB:139760"
- },
- {
- "id": 620,
- "tag": "Python"
- }
- ],
- "timestamp_created": "2024-01-12 09:35:28.315566+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/139760",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1045": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1045,
- "name": "Reconstructing cerebellar granule layer evoked LFP using convolution (ReConv) (Diwakar et al. 2011)",
- "repository_type": "github",
- "summary": "The model allows reconstruction of evoked local field potentials as seen in the cerebellar granular layer. The approach uses a detailed model of cerebellar granule neuron to generate data traces and then uses a \"ReConv\" or jittered repetitive convolution technique to reproduce post-synaptic local field potentials in the granular layer. The algorithm was used to generate both in vitro and in vivo evoked LFP and reflected the changes seen during LTP and LTD, when such changes were induced in the underlying neurons by modulating release probability of synapses and sodium channel regulated intrinsic excitability of the cells.",
- "tags": [
- {
- "id": 1546,
- "tag": "Evoked LFP"
- },
- {
- "id": 734,
- "tag": "Extracellular Fields"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 1531,
- "tag": "I Cl, leak"
- },
- {
- "id": 576,
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- "id": 580,
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- "tag": "Octave"
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- "timestamp_created": "2024-01-12 09:35:28.857371+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/139883",
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- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "id": 1046,
- "name": "Hyperconnectivity, slow synapses in PFC mental retardation and autism model (Testa-Silva et al 2011)",
- "repository_type": "github",
- "summary": "The subdirectory 'matlab' contains MATLAB scripts (The Mathworks, USA) that can be used to reproduce the panels of Figures 4-5.\r\n\r\nThis directory contains files to reproduce sample computer simulations presented in the 2011 paper authored by\r\n\r\nMeredith, R., Testa-Silva, G., Loebel, A., Giugliano, M., de Kock, C.; Mansvelder, H. \r\n\"Hyperconnectivity and slow synapses in prefrontal cortex of a model for mental retardation and autism\".\r\n\r\n\r\nABSTRACT\r\n\"... We propose that these findings are tightly linked: using a network model, we show that slower synapses are essential to counterbalance hyperconnectivity in order to maintain a dynamic range of excitatory activity. However, the slow synaptic time constants induce decreased responsiveness to low frequency stimulation, which may explain deficits in integration and information processing in attentional neuronal networks in neurodevelopmental disorders.\"",
- "tags": [
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- "id": 578,
- "tag": "Activity Patterns"
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- "tag": "Oscillations"
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- "id": 724,
- "tag": "Short-term Synaptic Plasticity"
- }
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- "timestamp_created": "2024-01-12 09:35:29.432767+00:00",
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- "uri": "https://github.com/OpenSourceBrain/140033",
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- "last_name": "Admin",
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- "name": "Dorsal root ganglion (DRG) neuronal model (Kovalsky et al. 2009)",
- "repository_type": "github",
- "summary": "This model, diverged from oscillatory parameters seen in live cells and failed to produce characteristic ectopic discharge patterns. Here we show that use of a more complete set of Na+ conductances--which includes several delayed components--enables simulation of the entire repertoire of oscillation-triggered electrogenic phenomena seen in live dorsal root ganglion (DRG) neurons. This includes a physiological window of induction and natural patterns of spike discharge. An INa+ component at 2-20 ms was particularly important, even though it represented only a tiny fraction of overall INa+ amplitude. With the addition of a delayed rectifier IK+ the singlet firing seen in some DRG neurons can also be simulated. The model reveals the key conductances that underlie afferent ectopia, conductances that are potentially attractive targets in the search for more effective treatments of neuropathic pain.",
- "tags": [
- {
- "id": 566,
- "tag": "Bursting"
- },
- {
- "id": 576,
- "tag": "I K"
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- "id": 582,
- "tag": "I Sodium"
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- "id": 567,
- "tag": "Ion Channel Kinetics"
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- "tag": "Late Na"
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- "id": 564,
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- "id": 1549,
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- "tag": "NEURON"
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- "id": 787,
- "tag": "Pathophysiology"
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- "timestamp_created": "2024-01-12 09:35:29.983448+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/140038",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
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- "id": 1048,
- "name": "A simple integrative electrophysiological model of bursting GnRH neurons (Csercsik et al. 2011)",
- "repository_type": "github",
- "summary": "In this paper a modular model of the GnRH\r\nneuron is presented. For the aim of simplicity, the\r\ncurrents corresponding to fast time scales and action\r\npotential generation are described by an impulsive system,\r\nwhile the slower currents and calcium dynamics\r\nare described by usual ordinary differential equations\r\n(ODEs). The model is able to reproduce the depolarizing\r\nafterpotentials, afterhyperpolarization, periodic\r\nbursting behavior and the corresponding calcium transients\r\nobserved in the case of GnRH neurons.",
- "tags": [
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- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 579,
- "tag": "Active Dendrites"
- },
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- "id": 566,
- "tag": "Bursting"
- },
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- "id": 572,
- "tag": "Calcium dynamics"
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- "id": 767,
- "tag": "MATLAB (web link to model)"
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- "id": 564,
- "tag": "ModelDB"
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- "id": 1550,
- "tag": "ModelDB:140246"
- }
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- "timestamp_created": "2024-01-12 09:35:30.526398+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/140246",
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- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "modeling"
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- "id": 1049,
- "name": "A multi-compartment model for interneurons in the dLGN (Halnes et al. 2011)",
- "repository_type": "github",
- "summary": "This model for dLGN interneurons is presented in two parameterizations (P1 & P2), which were fitted to current-clamp data from two different interneurons (IN1 & IN2). The model qualitatively reproduces the responses in IN1 & IN2 under 8 different experimental condition, and quantitatively reproduces the I/O-relations (#spikes elicited as a function of injected current).",
- "tags": [
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- "id": 579,
- "tag": "Active Dendrites"
- },
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 731,
- "tag": "I CAN"
- },
- {
- "id": 589,
- "tag": "I L high threshold"
- },
- {
- "id": 805,
- "tag": "I Mixed"
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- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 575,
- "tag": "I T low threshold"
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- "id": 1433,
- "tag": "I_AHP"
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- {
- "id": 564,
- "tag": "ModelDB"
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- "id": 1551,
- "tag": "ModelDB:140249"
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- {
- "id": 577,
- "tag": "NEURON"
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- {
- "id": 573,
- "tag": "Rebound firing"
- }
- ],
- "timestamp_created": "2024-01-12 09:35:31.045114+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/140249",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "auto_sync": true,
- "content_types": "modeling",
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- "modeling"
- ],
- "default_context": "master",
- "id": 1050,
- "name": "Firing patterns in stuttering fast-spiking interneurons (Klaus et al. 2011)",
- "repository_type": "github",
- "summary": "This is a morphologically extended version of the fast-spiking interneuron by Golomb et al. (2007).\r\n\r\nThe model captures the stuttering firing pattern and subthreshold oscillations in response to step current input as observed in many cortical and striatal fast-spiking cells.",
- "tags": [
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 600,
- "tag": "GENESIS"
- },
- {
- "id": 730,
- "tag": "I A, slow"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1552,
- "tag": "ModelDB:140254"
- },
- {
- "id": 1553,
- "tag": "PGENESIS"
- },
- {
- "id": 834,
- "tag": "Stuttering"
- }
- ],
- "timestamp_created": "2024-01-12 09:35:31.626438+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/140254",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "content_types": "modeling",
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- ],
- "default_context": "master",
- "id": 1051,
- "name": "Four cortical interneuron subtypes (Kubota et al. 2011)",
- "repository_type": "github",
- "summary": "\" ... Using electron microscopy and serial reconstructions, we analyzed the dendritic trees of\r\nfour morphologically distinct neocortical interneuron subtypes to reveal two underlying organizational\r\nprinciples common to all.\r\n\r\nFirst, cross-sectional areas at any given point within a dendrite were proportional\r\nto the summed length of all dendritic segments distal to that point.\r\n\r\n...\r\nSecond, dendritic cross-sections\r\nbecame progressively more elliptical at more proximal, larger diameter, dendritic locations.\r\n\r\nFinally,\r\ncomputer simulations revealed that these conserved morphological features limit distance dependent\r\nfiltering of somatic EPSPs and facilitate distribution of somatic depolarization into all dendritic\r\ncompartments.\r\n...\"",
- "tags": [
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- "id": 564,
- "tag": "ModelDB"
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- {
- "id": 1554,
- "tag": "ModelDB:140299"
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- "id": 577,
- "tag": "NEURON"
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- "timestamp_created": "2024-01-12 09:35:32.140370+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/140299",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "default_context": "master",
- "id": 1052,
- "name": "Calcium and potassium currents of olfactory bulb juxtaglomerular cells (Masurkar and Chen 2011)",
- "repository_type": "github",
- "summary": "Inward and outward currents of the olfactory bulb juxtaglomerular cells are characterized in the experiments and modeling in these two Masurkar and Chen 2011 papers.",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 589,
- "tag": "I L high threshold"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 575,
- "tag": "I T low threshold"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 769,
- "tag": "I_KHT"
- },
- {
- "id": 567,
- "tag": "Ion Channel Kinetics"
- },
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- "id": 564,
- "tag": "ModelDB"
- },
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- "id": 1555,
- "tag": "ModelDB:140462"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 588,
- "tag": "Olfaction"
- }
- ],
- "timestamp_created": "2024-01-12 09:35:32.663724+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/140462",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "modeling"
- ],
- "default_context": "master",
- "id": 1053,
- "name": "Cancelling redundant input in ELL pyramidal cells (Bol et al. 2011)",
- "repository_type": "github",
- "summary": "The paper investigates the property of the electrosensory lateral line lobe (ELL) of the brain of weakly electric fish to cancel predictable stimuli. Electroreceptors on the skin encode all signals in their firing activity, but superficial pyramidal (SP) cells in the ELL that receive this feedforward input do not respond to constant sinusoidal signals. This cancellation putatively occurs using a network of feedback delay lines and burst-induced synaptic plasticity between the delay lines and the SP cell that learns to cancel the redundant input. Biologically, the delay lines are parallel fibres from cerebellar-like granule cells in the eminentia granularis posterior.\r\n\r\nA model of this network (e.g. electroreceptors, SP cells, delay lines and burst-induced plasticity) was constructed to test whether the current knowledge of how the network operates is sufficient to cancel redundant stimuli. \r\n",
- "tags": [
- {
- "id": 579,
- "tag": "Active Dendrites"
- },
- {
- "id": 857,
- "tag": "Biofeedback"
- },
- {
- "id": 566,
- "tag": "Bursting"
- },
- {
- "id": 755,
- "tag": "C or Cplusplus program"
- },
- {
- "id": 565,
- "tag": "Dendritic Action Potentials"
- },
- {
- "id": 825,
- "tag": "Learning"
- },
- {
- "id": 749,
- "tag": "Long-term Synaptic Plasticity"
- },
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- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1556,
- "tag": "ModelDB:140465"
- },
- {
- "id": 874,
- "tag": "Noise Sensitivity"
- },
- {
- "id": 802,
- "tag": "STDP"
- },
- {
- "id": 725,
- "tag": "Synaptic Plasticity"
- },
- {
- "id": 803,
- "tag": "Unsupervised Learning"
- }
- ],
- "timestamp_created": "2024-01-12 09:35:33.462999+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/140465",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1054": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1054,
- "name": "Shaping of action potentials by different types of BK channels (Jaffe et al., 2011)",
- "repository_type": "github",
- "summary": "Dentate gyrus granule cells highly express the beta4 accessory subunit which confer BK channels with type II properties. The properties of heterologously-expressed BK channels (with and without the beta4 subunit) were used to construct channel models. These were then used to study how they affect single action potentials and trains of spikes in a model dentate gyrus granule cells (based on Aradi and Holmes, 1999).",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1557,
- "tag": "ModelDB:140471"
- },
- {
- "id": 577,
- "tag": "NEURON"
- }
- ],
- "timestamp_created": "2024-01-12 09:35:33.992373+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/140471",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1055": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1055,
- "name": "Dipole Localization Kit (Mechler & Victor, 2012)",
- "repository_type": "github",
- "summary": "We localize a single neuron from the spatial sample of its EAP\r\namplitudes recorded with a multisite probe (with 6 or more independent\r\nmeasurement sites or channels, e.g., a silicon polytrode, a stepped\r\ntetrode, etc.) This is an inverse problem and we solve it by fitting a\r\nmodel to the EAPs that consists of a volume conductor model of the\r\nneural tissue (known), a realistic model of the probe (known), and a\r\nsingle dipole current source of the model neuron (unknown). The dipole\r\nis free to change position, size, and orientation (a total of 6\r\nparameters) at each moment during the action potential.",
- "tags": [
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 756,
- "tag": "Methods"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1558,
- "tag": "ModelDB:140599"
- }
- ],
- "timestamp_created": "2024-01-12 09:35:34.512896+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/140599",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1056": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1056,
- "name": "CA3 Radiatum/Lacunosum-Moleculare interneuron, Ih (Anderson et al. 2011)",
- "repository_type": "github",
- "summary": "\"The present study examines the biophysical\r\nproperties and functional implications of Ih in hippocampal\r\narea CA3 interneurons with somata in strata radiatum and\r\nlacunosum-moleculare.... The functional\r\nconsequences of Ih were examined with regard to temporal\r\nsummation and impedance measurements. ...\r\nFrom impedance measurements, we\r\nfound that Ih did not confer theta-band resonance, but\r\nflattened the impedance\u2013frequency relations instead. ... Finally, a model of Ih was employed in\r\ncomputational analyses to confirm and elaborate upon the\r\ncontributions of Ih to impedance and temporal summation.\"",
- "tags": [
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1559,
- "tag": "ModelDB:140732"
- }
- ],
- "timestamp_created": "2024-01-12 09:35:35.015014+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/140732",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1057": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1057,
- "name": "Motoneuron model of self-sustained firing after spinal cord injury (Kurian et al. 2011)",
- "repository_type": "github",
- "summary": "\" ...\r\nDuring the acute-stage of spinal cord injury (SCI), the endogenous ability to generate plateaus is lost; however, during the chronic-stage of SCI, plateau potentials reappear with prolonged self-sustained firing that has been implicated in the development of spasticity. In this work, we extend previous modeling studies to systematically investigate the mechanisms underlying the generation of plateau potentials in motoneurons, including the influences of specific ionic currents, the morphological characteristics of the soma and dendrite, and the interactions between persistent inward currents and synaptic input.\r\n...\"",
- "tags": [
- {
- "id": 579,
- "tag": "Active Dendrites"
- },
- {
- "id": 731,
- "tag": "I CAN"
- },
- {
- "id": 1560,
- "tag": "I Ca,p"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 739,
- "tag": "I Na,p"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 763,
- "tag": "Intrinsic plasticity"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1561,
- "tag": "ModelDB:140788"
- },
- {
- "id": 569,
- "tag": "Simplified Models"
- },
- {
- "id": 596,
- "tag": "Synaptic Integration"
- },
- {
- "id": 759,
- "tag": "XPPAUT"
- }
- ],
- "timestamp_created": "2024-01-12 09:35:35.532501+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/140788",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1058": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1058,
- "name": "Detailed passive cable model of Dentate Gyrus Basket Cells (Norenberg et al. 2010)",
- "repository_type": "github",
- "summary": "Fast-spiking, parvalbumin-expressing basket cells (BCs) play a key role in feedforward and feedback inhibition in the hippocampus. \r\n...\r\nTo quantitatively address this question, we developed detailed passive cable models of BCs in the dentate gyrus based on dual somatic or somatodendritic recordings and complete morphologic reconstructions. \r\n\r\nBoth specific membrane capacitance and axial resistivity were comparable to those of pyramidal neurons, but the average somatodendritic specific membrane resistance (R(m)) was substantially lower in BCs. \r\n\r\nFurthermore, R(m) was markedly nonuniform, being lowest in soma and proximal dendrites, intermediate in distal dendrites, and highest in the axon. \r\n...\r\nFurther computational analysis revealed that these unique cable properties accelerate the time course of synaptic potentials at the soma in response to fast inputs, while boosting the efficacy of slow distal inputs. \r\n\r\nThese properties will facilitate both rapid phasic and efficient tonic activation of BCs in hippocampal microcircuits.\r\n",
- "tags": [
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1562,
- "tag": "ModelDB:140789"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 568,
- "tag": "Parameter Fitting"
- }
- ],
- "timestamp_created": "2024-01-12 09:35:36.062333+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/140789",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1059": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1059,
- "name": "Dendritic Discrimination of Temporal Input Sequences (Branco et al. 2010)",
- "repository_type": "github",
- "summary": "Compartmental model of a layer 2/3 pyramidal cell in the rat somatosensory cortex, exploring NMDA-dependent sensitivity to the temporal sequence of synaptic activation.",
- "tags": [
- {
- "id": 860,
- "tag": "Direction Selectivity"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1563,
- "tag": "ModelDB:140828"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 587,
- "tag": "Spatio-temporal Activity Patterns"
- },
- {
- "id": 596,
- "tag": "Synaptic Integration"
- }
- ],
- "timestamp_created": "2024-01-12 09:35:36.565538+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/140828",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1060": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1060,
- "name": "Computational Surgery (Lytton et al. 2011)",
- "repository_type": "github",
- "summary": "Figure 2 in\r\n Neocortical simulation for epilepsy surgery guidance: Localization and intervention,\r\n by William W. Lytton, Samuel A. Neymotin, Jason C. Wester, and Diego Contreras\r\n in Computational Surgery and Dual Training, Springer, 2011\r\n",
- "tags": [
- {
- "id": 469,
- "tag": "Epilepsy"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1564,
- "tag": "ModelDB:140881"
- },
- {
- "id": 577,
- "tag": "NEURON"
- }
- ],
- "timestamp_created": "2024-01-12 09:35:37.068082+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/140881",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1061": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 1061,
- "name": "Event-related simulation of neural processing in complex visual scenes (Mihalas et al. 2011)",
- "repository_type": "github",
- "summary": "\"... We here present an environment for the\r\nimplementation of large networks of generalized integrate-and-fire\r\nneurons which uses an asynchronous event-based algorithm.\r\n...\r\nThe neuronal network to be simulated\r\nand all parameters are defined in extendible markup language.\r\nA model of the primate early visual system is implemented. The\r\nuse of the tool is illustrated by simulating the processing of both\r\nsimple and complex visual scenes through retina, thalamus and\r\nprimary visual cortex.\"",
- "tags": [
- {
- "id": 1565,
- "tag": "ERNST (Event Related Neuronal Simulation Tool) (web link to model)"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1566,
- "tag": "ModelDB:140964"
- },
- {
- "id": 758,
- "tag": "Sensory processing"
- },
- {
- "id": 726,
- "tag": "Vision"
- },
- {
- "id": 829,
- "tag": "XML (web link to model)"
- }
- ],
- "timestamp_created": "2024-01-12 09:35:37.628352+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/140964",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1062": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1062,
- "name": "Measuring neuronal identification quality in ensemble recordings (isoitools) (Neymotin et al. 2011)",
- "repository_type": "github",
- "summary": "\"... Here we describe information theoretic\r\nmeasures of action potential waveform isolation applicable to any dataset, that have an intuitive,\r\nuniversal interpretation, and that are not dependent on the methods or choice of parameters for\r\nsingle unit isolation, and that have been validated using a dataset.\"",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 755,
- "tag": "C or Cplusplus program"
- },
- {
- "id": 734,
- "tag": "Extracellular Fields"
- },
- {
- "id": 756,
- "tag": "Methods"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1567,
- "tag": "ModelDB:141061"
- }
- ],
- "timestamp_created": "2024-01-12 09:35:38.216873+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/141061",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1063": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1063,
- "name": "Relative spike time coding and STDP-based orientation selectivity in V1 (Masquelier 2012)",
- "repository_type": "github",
- "summary": "Phenomenological spiking model of the cat early visual system. We show how natural vision can drive spike time correlations on sufficiently fast time scales to lead to the acquisition of orientation-selective V1 neurons through STDP. This is possible without reference times such as stimulus onsets, or saccade landing times. But even when such reference times are available, we demonstrate that the relative spike times encode the images more robustly than the absolute ones.",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 755,
- "tag": "C or Cplusplus program"
- },
- {
- "id": 595,
- "tag": "Coincidence Detection"
- },
- {
- "id": 793,
- "tag": "Development"
- },
- {
- "id": 1478,
- "tag": "Information transfer"
- },
- {
- "id": 825,
- "tag": "Learning"
- },
- {
- "id": 749,
- "tag": "Long-term Synaptic Plasticity"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1568,
- "tag": "ModelDB:141062"
- },
- {
- "id": 1569,
- "tag": "Orientation selectivity"
- },
- {
- "id": 719,
- "tag": "Pattern Recognition"
- },
- {
- "id": 802,
- "tag": "STDP"
- },
- {
- "id": 587,
- "tag": "Spatio-temporal Activity Patterns"
- },
- {
- "id": 725,
- "tag": "Synaptic Plasticity"
- },
- {
- "id": 586,
- "tag": "Synchronization"
- },
- {
- "id": 720,
- "tag": "Temporal Pattern Generation"
- },
- {
- "id": 803,
- "tag": "Unsupervised Learning"
- },
- {
- "id": 726,
- "tag": "Vision"
- },
- {
- "id": 822,
- "tag": "Winner-take-all"
- }
- ],
- "timestamp_created": "2024-01-12 09:35:39.107943+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/141062",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1064": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1064,
- "name": "Role of Ih in firing patterns of cold thermoreceptors (Orio et al., 2012)",
- "repository_type": "github",
- "summary": "\" ... Here we investigated the role of Ih in cold-sensitive (CS) nerve endings, where cold sensory transduction actually takes place. Corneal CS nerve endings in mice show a rhythmic spiking activity at neutral skin temperature that switches to bursting mode when the temperature is lowered. \r\n...\r\nMathematical modeling shows that the firing phenotype of CS nerve endings from HCN1-/- mice can be reproduced by replacing HCN1 channels with the slower HCN2 channels rather than by abolishing Ih. We propose that Ih carried by HCN1 channels helps tune the frequency of the oscillation and the length of bursts underlying regular spiking in cold thermoreceptors, having important implications for neural coding of cold sensation. \r\n\"",
- "tags": [
- {
- "id": 566,
- "tag": "Bursting"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 739,
- "tag": "I Na,p"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1570,
- "tag": "ModelDB:141063"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 821,
- "tag": "Sensory coding"
- },
- {
- "id": 758,
- "tag": "Sensory processing"
- },
- {
- "id": 569,
- "tag": "Simplified Models"
- }
- ],
- "timestamp_created": "2024-01-12 09:35:39.885742+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/141063",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1065": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1065,
- "name": "A four compartmental model for ABPD complex in crustacean pyloric network (Maran et al. 2011)",
- "repository_type": "github",
- "summary": "\"Central pattern generators (CPGs) frequently include bursting neurons that serve as pacemakers for rhythm generation.\r\n\r\nPhase resetting curves (PRCs) can provide insight into mechanisms underlying phase locking in such circuits.\r\n\r\nPRCs were constructed for a pacemaker bursting complex in the pyloric circuit in the stomatogastric ganglion of the lobster and crab.\r\n...\"",
- "tags": [
- {
- "id": 566,
- "tag": "Bursting"
- },
- {
- "id": 755,
- "tag": "C or Cplusplus program"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1571,
- "tag": "ModelDB:141192"
- }
- ],
- "timestamp_created": "2024-01-12 09:35:40.469364+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/141192",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1066": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1066,
- "name": "Multiscale interactions between chemical and electric signaling in LTP (Bhalla 2011)",
- "repository_type": "github",
- "summary": "\"Synaptic plasticity leads to long-term changes in excitability, whereas cellular homeostasis maintains\r\nexcitability. Both these processes involve interactions between molecular events, electrical events, and\r\nnetwork activity. Here I explore these intersections with a multilevel model that embeds molecular events\r\nfollowing synaptic calcium influx into a multicompartmental electrical model of a CA1 hippocampal\r\nneuron. ...\"",
- "tags": [
- {
- "id": 600,
- "tag": "GENESIS"
- },
- {
- "id": 75,
- "tag": "Homeostasis"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 1433,
- "tag": "I_AHP"
- },
- {
- "id": 749,
- "tag": "Long-term Synaptic Plasticity"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1572,
- "tag": "ModelDB:141226"
- },
- {
- "id": 866,
- "tag": "Multiscale"
- },
- {
- "id": 725,
- "tag": "Synaptic Plasticity"
- }
- ],
- "timestamp_created": "2024-01-12 09:35:41.023196+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/141226",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1067": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1067,
- "name": "Cerebellar long-term depression (LTD) (Antunes and De Schutter 2012)",
- "repository_type": "github",
- "summary": "Many cellular processes involve small number of molecules and undergo stochastic fluctuations in their levels of activity. Among these processes is cerebellar long-term depression (LTD), a form of synaptic plasticity expressed as a reduction in the number of synaptic AMPA receptors (AMPARs) in Purkinje cells. Using a stochastic model of the signaling network and mechanisms of AMPAR trafficking involved in LTD, we show that the network activity in single synapses switches between two discrete stable states (LTD and non-LTD). Stochastic fluctuations affecting more intensely the level of activity of a few components of the network lead to the probabilistic induction of LTD and threshold dithering. The non-uniformly distributed stochasticity of the network allows the stable occurrence of several different macroscopic levels of depression, determining the experimentally observed sigmoidal relationship between the magnitude of depression and the concentration of the triggering signal.",
- "tags": [
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1573,
- "tag": "ModelDB:141270"
- },
- {
- "id": 1574,
- "tag": "STEPS"
- },
- {
- "id": 725,
- "tag": "Synaptic Plasticity"
- }
- ],
- "timestamp_created": "2024-01-12 09:35:41.567943+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/141270",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1068": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1068,
- "name": "Simple and accurate Diffusion Approximation algor. for stochastic ion channels (Orio & Soudry 2012)",
- "repository_type": "github",
- "summary": "\" ... We derived the (Stochastic Differential Equations) SDE explicitly for any given ion channel kinetic scheme. The resulting generic equations were surprisingly simple and interpretable \u2013 allowing an easy, transparent and efficient (Diffusion Approximation) DA implementation, avoiding unnecessary approximations. The algorithm was tested in a voltage clamp simulation and in two different current clamp simulations, yielding the same results as (Markov Chains) MC modeling. Also, the simulation efficiency of this DA method demonstrated considerable superiority over MC methods, except when short time steps or low channel numbers were used.\"",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 748,
- "tag": "Markov-type model"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1575,
- "tag": "ModelDB:141272"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 816,
- "tag": "SciLab"
- },
- {
- "id": 1576,
- "tag": "Stochastic simulation"
- }
- ],
- "timestamp_created": "2024-01-12 09:35:42.348132+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/141272",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1069": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
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- "default_context": "master",
- "id": 1069,
- "name": "Engaging distinct oscillatory neocortical circuits (Vierling-Claassen et al. 2010)",
- "repository_type": "github",
- "summary": "\"Selective optogenetic drive of fast-spiking (FS) interneurons (INs) leads to enhanced local field potential (LFP) power across the traditional \u201cgamma\u201d frequency band (20\u201380 Hz; Cardin et al., 2009).\r\n\r\nIn contrast, drive to regular-spiking (RS) pyramidal cells enhances power at lower frequencies, with a peak at 8 Hz.\r\n\r\nThe first result is consistent with previous computational studies emphasizing the role of FS and the time constant of GABAA synaptic inhibition in gamma rhythmicity.\r\n\r\nHowever, the same theoretical models do not typically predict low-frequency LFP enhancement with RS drive.\r\n\r\nTo develop hypotheses as to how the same network can support these contrasting behaviors, we constructed a biophysically principled network model of primary somatosensory neocortex containing FS, RS, and low-threshold spiking (LTS) INs. ...\"",
- "tags": [
- {
- "id": 1527,
- "tag": "Brain Rhythms"
- },
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
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- "id": 1546,
- "tag": "Evoked LFP"
- },
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- "id": 583,
- "tag": "I Calcium"
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- "id": 576,
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- "id": 581,
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- "id": 580,
- "tag": "I M"
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- "id": 574,
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- "id": 575,
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- "tag": "I h"
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- "id": 564,
- "tag": "ModelDB"
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- "id": 1577,
- "tag": "ModelDB:141273"
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- "id": 577,
- "tag": "NEURON"
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- {
- "id": 585,
- "tag": "Oscillations"
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- {
- "id": 764,
- "tag": "Touch"
- }
- ],
- "timestamp_created": "2024-01-12 09:35:42.985803+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/141273",
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- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "id": 1070,
- "name": "Biophysically detailed model of the mouse sino-atrial node cell (Kharche et al. 2011)",
- "repository_type": "github",
- "summary": "This model is developed to study the role of various electrophysiological mechanisms in generating cardiac pacemaking action potentials (APs).The model incorporates membrane ionic currents and intracellular mechanisms contributing to spontaneous mouse SAN APs. The model was validated by testing the functional roles of individual membrane currents in one and multiple parameter analyses.The roles of intracellular Ca2+-handling mechanisms on cardiac pacemaking were also investigated in the model.",
- "tags": [
- {
- "id": 727,
- "tag": "Action Potential Initiation"
- },
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 755,
- "tag": "C or Cplusplus program"
- },
- {
- "id": 572,
- "tag": "Calcium dynamics"
- },
- {
- "id": 797,
- "tag": "Cardiac pacemaking"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 721,
- "tag": "I N"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 789,
- "tag": "I_HERG"
- },
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- "id": 784,
- "tag": "KCNQ1"
- },
- {
- "id": 564,
- "tag": "ModelDB"
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- {
- "id": 1578,
- "tag": "ModelDB:141274"
- },
- {
- "id": 738,
- "tag": "Na/Ca exchanger"
- },
- {
- "id": 740,
- "tag": "Na/K pump"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- }
- ],
- "timestamp_created": "2024-01-12 09:35:43.533805+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/141274",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1071": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1071,
- "name": "Prosthetic electrostimulation for information flow repair in a neocortical simulation (Kerr 2012)",
- "repository_type": "github",
- "summary": "This model is an extension of a model ( http://modeldb.yale.edu/138379 ) recently published in Frontiers in Computational Neuroscience. This model consists of 4700 event-driven, rule-based neurons, wired according to anatomical data, and driven by both white-noise synaptic inputs and a sensory signal recorded from a rat thalamus. Its purpose is to explore the effects of cortical damage, along with the repair of this damage via a neuroprosthesis.",
- "tags": [
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 1527,
- "tag": "Brain Rhythms"
- },
- {
- "id": 831,
- "tag": "Deep brain stimulation"
- },
- {
- "id": 765,
- "tag": "I Chloride"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 1478,
- "tag": "Information transfer"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1579,
- "tag": "ModelDB:141505"
- },
- {
- "id": 577,
- "tag": "NEURON"
- }
- ],
- "timestamp_created": "2024-01-12 09:35:44.047013+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/141505",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1072": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1072,
- "name": "Network model with neocortical architecture (Anderson et al 2007,2012; Azhar et al 2012)",
- "repository_type": "github",
- "summary": "Architecturally realistic neocortical model using seven classes of excitatory and inhibitory single compartment Hodgkin-Huxley cells. This is an addendum to ModelDB Accession # 98902, Studies of stimulus parameters for seizure disruption (Anderson et al. 2007). Wiring is adapted from the minicolumn hypothesis and incorporates visual and neocortical wiring data. Simulation demonstrates spontaneous bursting onset and cessation. This activity can be induced by random fluctuations in the surrounding background input.",
- "tags": [
- {
- "id": 566,
- "tag": "Bursting"
- },
- {
- "id": 755,
- "tag": "C or Cplusplus program"
- },
- {
- "id": 469,
- "tag": "Epilepsy"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 591,
- "tag": "I K,leak"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1580,
- "tag": "ModelDB:141507"
- },
- {
- "id": 726,
- "tag": "Vision"
- }
- ],
- "timestamp_created": "2024-01-12 09:35:44.559396+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/141507",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1073": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1073,
- "name": "Basal ganglia-thalamic network model for deep brain stimulation (So et al. 2012)",
- "repository_type": "github",
- "summary": "This is a model of the basal ganglia-thalamic network, modified from the Rubin and Terman model (High frequency stimulation of the Subthalamic Nucleus, Rubin and Terman 2004). We subsequently used this model to investigate the effectiveness of STN and GPi DBS as well as lesion when various proportions of local cells and fibers of passage were activated or silenced. The BG network exhibited characteristics consistent with published experimental data, both on the level of single cells and on the network level. Perhaps most notably, and in contrast to the original RT model, the changes in the thalamic error index with changes in the DBS frequency matched well the changes in clinical symptoms with changes in DBS frequency.",
- "tags": [
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 566,
- "tag": "Bursting"
- },
- {
- "id": 831,
- "tag": "Deep brain stimulation"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 1531,
- "tag": "I Cl, leak"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 575,
- "tag": "I T low threshold"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1581,
- "tag": "ModelDB:141699"
- },
- {
- "id": 801,
- "tag": "Parkinson's"
- }
- ],
- "timestamp_created": "2024-01-12 09:35:45.174600+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/141699",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1074": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 1074,
- "name": "Mathematical Foundations of Neuroscience (Ermentrout and Terman 2010)",
- "repository_type": "github",
- "summary": "Ermentrout and Terman's book on dynamical systems and computational methods in neuroscience has associated computer code available at http://www.math.pitt.edu/~bard/bardware/neurobook/allodes.html. The main emphasis in the book is on single-neuron biophysics and there is also systems neuroscience theory and applications to networks. The electronic text of the book is freely available!",
- "tags": [
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1582,
- "tag": "ModelDB:141835"
- },
- {
- "id": 732,
- "tag": "Tutorial/Teaching"
- },
- {
- "id": 830,
- "tag": "XPP (web link to model)"
- }
- ],
- "timestamp_created": "2024-01-12 09:35:45.743415+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/141835",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1075": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1075,
- "name": "Two Models for synaptic input statistics for the MSO neuron model (Jercog et al. 2010)",
- "repository_type": "github",
- "summary": "The model is a point neuron model with ionic currents from Rothman & Mannis (2003) and with an update of the low threshold potassium current (IKLT) measured in-vitro by Mathews & Jercog et al (2010).\r\nThis model in conjunction with the synaptic input models presented here has been used to gain insight into mechanisms that account for experimentally observed asymmetries in ITD tuning (Brand et al, 2002).\r\nAsymmetry and displacement of the ITD response function is achieved in the model by the interplay between asymmetry of the excitatory inputs arriving from the two sides and the precise voltage dependent activation of IKLT.\r\nIn Jercog et al (2010) we propose two different mathematical ways, physiologically plausible scenarios, of generating the asymmetry in the bilateral synaptic input events. Here, we present two models for simulating the stochastic synaptic input trains.",
- "tags": [
- {
- "id": 762,
- "tag": "Audition"
- },
- {
- "id": 755,
- "tag": "C or Cplusplus program"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1583,
- "tag": "ModelDB:141991"
- },
- {
- "id": 1584,
- "tag": "Synaptic-input statistic"
- }
- ],
- "timestamp_created": "2024-01-12 09:35:46.419240+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/141991",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1076": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 1076,
- "name": "Efficient simulation environment for modeling large-scale cortical processing (Richert et al. 2011)",
- "repository_type": "github",
- "summary": "\"We have developed a spiking neural network simulator, which is both easy to use and computationally efficient, for the generation of large-scale computational neuroscience models. The simulator implements current or conductance based Izhikevich neuron networks, having spike-timing dependent plasticity and short-term plasticity. ...\"",
- "tags": [
- {
- "id": 776,
- "tag": "C or Cplusplus program (web link to model)"
- },
- {
- "id": 749,
- "tag": "Long-term Synaptic Plasticity"
- },
- {
- "id": 756,
- "tag": "Methods"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1585,
- "tag": "ModelDB:142062"
- },
- {
- "id": 802,
- "tag": "STDP"
- },
- {
- "id": 724,
- "tag": "Short-term Synaptic Plasticity"
- }
- ],
- "timestamp_created": "2024-01-12 09:35:47.017385+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/142062",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1077": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1077,
- "name": "Hippocampal CA3 network and circadian regulation (Stanley et al. 2013)",
- "repository_type": "github",
- "summary": "This model produces the hippocampal CA3 neural network model used \r\nin the paper below. It has two modes of operation, a default mode and a circadian mode. In the circadian mode, parameters are swept through a range of values. \r\nThis model can be quite easily adapted to produce theta and gamma oscillations, as certain parameter sweeps will reveal (see Figures). BASH scripts interact with GENESIS\r\n2.3 to implement parameter sweeps.\r\nThe model contains four cell types derived from prior papers.\r\nCA3 pyramidal are derived from Traub et al (1991); Basket, \r\nstratum oriens (O-LM), and Medial Septal GABAergic\r\n(MSG) interneurons are taken from Hajos et al (2004).",
- "tags": [
- {
- "id": 1527,
- "tag": "Brain Rhythms"
- },
- {
- "id": 1586,
- "tag": "Circadian Rhythms"
- },
- {
- "id": 469,
- "tag": "Epilepsy"
- },
- {
- "id": 600,
- "tag": "GENESIS"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1587,
- "tag": "ModelDB:142104"
- }
- ],
- "timestamp_created": "2024-01-12 09:35:47.536905+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/142104",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1078": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1078,
- "name": "Rate model of a cortical RS-FS-LTS network (Hayut et al. 2011)",
- "repository_type": "github",
- "summary": "A rate model of cortical networks composed of RS, FS and LTS neurons. Synaptic depression is modelled according to the Tsodyks-Markram scheme.",
- "tags": [
- {
- "id": 755,
- "tag": "C or Cplusplus program"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1588,
- "tag": "ModelDB:142199"
- },
- {
- "id": 791,
- "tag": "Rate-coding model neurons"
- },
- {
- "id": 724,
- "tag": "Short-term Synaptic Plasticity"
- }
- ],
- "timestamp_created": "2024-01-12 09:35:48.068978+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/142199",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1079": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1079,
- "name": "FRAT: An amygdala-centered model of fear conditioning (Krasne et al. 2011)",
- "repository_type": "github",
- "summary": "Model of Pavlovian fear conditioning and extinction (due to neuromodulator-controlled LTP on principal cells and inhibory interneurons)occur in amygdala and contextual representations are learned in hippocampus. Many properties of fear conditioning are accounted for.",
- "tags": [
- {
- "id": 825,
- "tag": "Learning"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1589,
- "tag": "ModelDB:142273"
- }
- ],
- "timestamp_created": "2024-01-12 09:35:48.561945+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/142273",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1080": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1080,
- "name": "Ion concentration dynamics as a mechanism for neuronal bursting (Barreto & Cressman 2011)",
- "repository_type": "github",
- "summary": "\"We describe a simple conductance-based model neuron that includes intra and\r\nextracellular ion concentration dynamics and show that this model exhibits periodic\r\nbursting. The bursting arises as the fast-spiking behavior of the neuron is modulated\r\nby the slow oscillatory behavior in the ion concentration variables and vice versa. By\r\nseparating these time scales and studying the bifurcation structure of the neuron, we catalog\r\nseveral qualitatively different bursting profiles that are strikingly similar to those seen in\r\nexperimental preparations. Our work suggests that ion concentration dynamics may play an\r\nimportant role in modulating neuronal excitability in real biological systems.\"",
- "tags": [
- {
- "id": 566,
- "tag": "Bursting"
- },
- {
- "id": 755,
- "tag": "C or Cplusplus program"
- },
- {
- "id": 873,
- "tag": "Depolarization block"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1590,
- "tag": "ModelDB:142630"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 569,
- "tag": "Simplified Models"
- },
- {
- "id": 759,
- "tag": "XPPAUT"
- }
- ],
- "timestamp_created": "2024-01-12 09:35:49.126971+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/142630",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1081": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1081,
- "name": "Fisher and Shannon information in finite neural populations (Yarrow et al. 2012)",
- "repository_type": "github",
- "summary": "Here we model populations of rate-coding neurons with bell-shaped tuning curves and multiplicative Gaussian noise. This Matlab code supports the calculation of information theoretic (mutual information, stimulus-specific information, stimulus-specific surprise) and Fisher-based measures (Fisher information, I_Fisher, SSI_Fisher) in these population models. The information theoretic measures are computed by Monte Carlo integration, which allows computationally-intensive decompositions of the mutual information to be computed for relatively large populations (hundreds of neurons).",
- "tags": [
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1591,
- "tag": "ModelDB:142990"
- },
- {
- "id": 791,
- "tag": "Rate-coding model neurons"
- }
- ],
- "timestamp_created": "2024-01-12 09:35:49.764652+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/142990",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1082": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1082,
- "name": "ClC-2 channels regulate neuronal excitability, not intracellular Cl- levels (Ratte & Prescott 2011)",
- "repository_type": "github",
- "summary": "\"The model is for a generic, single compartment neuron with multiple ion currents. The most notable mechanisms include ClC-2 (a rectifying chloride-leak channel) and KCC2 (potassium chloride co-transporter 2). A significant feature of the model is that it tracks intracellular chloride concentration. Moreover, the GABA-A receptor is modeled as passing both chloride and bicarbonate ions, which is important for proper calculation of the GABA reversal potential. Ornstein-Unlenbeck processes to simulate synaptic inhibition and excitation are also included.\"\r\n",
- "tags": [
- {
- "id": 1592,
- "tag": "Chloride regulation"
- },
- {
- "id": 1531,
- "tag": "I Cl, leak"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1593,
- "tag": "ModelDB:142993"
- },
- {
- "id": 759,
- "tag": "XPPAUT"
- }
- ],
- "timestamp_created": "2024-01-12 09:35:50.259566+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/142993",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1083": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1083,
- "name": "Explaining pathological changes in axonal excitability by dynamical analysis (Coggan et al. 2011)",
- "repository_type": "github",
- "summary": "\"... To help decipher the biophysical basis for \u2018paroxysmal\u2019\r\nspiking, we replicated afterdischarge (i.e. continued spiking after a brief stimulus) in a\r\nminimal conductance-based axon model.\r\n\r\n...\r\nA perturbation\r\ncould abruptly switch the system between two (quasi-)stable attractor states: rest and\r\nrepetitive spiking.\r\n...\r\n Initiation of afterdischarge was explained by activation of the\r\npersistent inward current forcing the system to cross a saddle point that separates the basins of\r\nattraction associated with each attractor.\r\n\r\nTermination of afterdischarge was explained by the\r\nattractor associated with repetitive spiking being destroyed.\r\n...\r\nThe model also explains other features of\r\nparoxysmal symptoms, including temporal summation and refractoriness.\"",
- "tags": [
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1594,
- "tag": "ModelDB:143072"
- },
- {
- "id": 775,
- "tag": "Nociception"
- },
- {
- "id": 759,
- "tag": "XPPAUT"
- }
- ],
- "timestamp_created": "2024-01-12 09:35:50.797602+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/143072",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1084": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1084,
- "name": "STDP and oscillations produce phase-locking (Muller et al. 2011)",
- "repository_type": "github",
- "summary": "\"... In this note, we investigate a simple mechanism for learning precise LFP-to-spike coupling in feed-forward networks \u2013 the reliable, periodic modulation of presynaptic firing rates during oscillations, coupled with spike-timing dependent plasticity. When oscillations are within the biological range (2\u2013150 Hz), firing rates of the inputs change on a timescale highly relevant to spike-timing dependent plasticity (STDP). Through analytic and computational methods, we find points of stable phase-locking for a neuron with plastic input synapses.\r\n\r\nThese points correspond to precise phase-locking behavior in the feed-forward network. The location of these points depends on the oscillation frequency of the inputs, the STDP time constants, and the balance of potentiation and de-potentiation in the STDP rule.\r\n...\"\r\n",
- "tags": [
- {
- "id": 645,
- "tag": "Brian"
- },
- {
- "id": 749,
- "tag": "Long-term Synaptic Plasticity"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1595,
- "tag": "ModelDB:143083"
- },
- {
- "id": 620,
- "tag": "Python"
- }
- ],
- "timestamp_created": "2024-01-12 09:35:51.292953+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/143083",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1085": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1085,
- "name": "Phase response curve of a globus pallidal neuron (Fujita et al. 2011)",
- "repository_type": "github",
- "summary": "We investigated how changes in ionic conductances alter the phase response curve (PRC) of a globus pallidal (GP) neuron and stability of a synchronous activity of a GP network, using a single-compartmental conductance-based neuron model. The results showed the PRC and the stability were influenced by changes in the persistent sodium current, the Kv3 potassium, the M-type potassium and the calcium-dependent potassium current.",
- "tags": [
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 730,
- "tag": "I A, slow"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 580,
- "tag": "I M"
- },
- {
- "id": 739,
- "tag": "I Na,p"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 784,
- "tag": "KCNQ1"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1596,
- "tag": "ModelDB:143100"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 801,
- "tag": "Parkinson's"
- },
- {
- "id": 823,
- "tag": "Phase Response Curves"
- },
- {
- "id": 586,
- "tag": "Synchronization"
- }
- ],
- "timestamp_created": "2024-01-12 09:35:51.853484+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/143100",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1086": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1086,
- "name": "Effects of the membrane AHP on the Lateral Superior Olive (LSO) (Zhou & Colburn 2010)",
- "repository_type": "github",
- "summary": "This simulation study investigated how membrane afterhyperpolarization (AHP) influences spiking activity of neurons in the Lateral Superior Olive (LSO). The model incorporates a general integrate-and-fire spiking mechanism with a first-order adaptation channel. Simulations focus on differentiating the effects of GAHP, tauAHP, and input strength on (1) spike interval statistics, such as negative serial correlation and chopper onset, and (2) neural sensitivity to interaural level difference (ILD) of LSO neurons. The model simulated electrophysiological data collected in cat LSO (Tsuchitani and Johnson, 1985).",
- "tags": [
- {
- "id": 727,
- "tag": "Action Potential Initiation"
- },
- {
- "id": 762,
- "tag": "Audition"
- },
- {
- "id": 873,
- "tag": "Depolarization block"
- },
- {
- "id": 1433,
- "tag": "I_AHP"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1597,
- "tag": "ModelDB:143114"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 569,
- "tag": "Simplified Models"
- },
- {
- "id": 777,
- "tag": "Spike Frequency Adaptation"
- }
- ],
- "timestamp_created": "2024-01-12 09:35:52.424272+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/143114",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1087": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1087,
- "name": "Extraction and classification of three cortical neuron types (Mensi et al. 2012)",
- "repository_type": "github",
- "summary": "This script proposes a new convex fitting procedure that allows the parameters estimation of a large class of stochastic Integrate-and-Fire model upgraded with spike-triggered current and moving threshold from patch-clamp experiments (i.e. given the injected current and the recorded membrane potential).\r\nThis script applies the method described in the paper to estimate the parameters of a reference model from a single voltage trace and the corresponding input current and evaluate the performance of the fitted model on a separated test set.",
- "tags": [
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1598,
- "tag": "ModelDB:143148"
- }
- ],
- "timestamp_created": "2024-01-12 09:35:52.949356+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/143148",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1088": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1088,
- "name": "Phase precession through acceleration of local theta rhythm (Castro & Aguiar 2011)",
- "repository_type": "github",
- "summary": "\"... Here we\r\npresent a biophysical spiking model for phase precession in\r\nhippocampal CA1 which focuses on the interaction between\r\nplace cells and local inhibitory interneurons.\r\n\r\nThe model\u2019s\r\nfunctional block is composed of a place cell (PC) connected\r\nwith a local inhibitory cell (IC) which is modulated by the\r\npopulation theta rhythm.\r\n\r\nBoth cells receive excitatory inputs\r\nfrom the entorhinal cortex (EC).\r\n...\"\r\n",
- "tags": [
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1599,
- "tag": "ModelDB:143248"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 799,
- "tag": "Place cell/field"
- },
- {
- "id": 586,
- "tag": "Synchronization"
- }
- ],
- "timestamp_created": "2024-01-12 09:35:53.463843+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/143248",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1089": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1089,
- "name": "Effects of eugenol on the firing of action potentials in NG108-15 neurons (Huang et al. 2011)",
- "repository_type": "github",
- "summary": "\"Rationale: Eugenol (EUG, 4-allyl-2-methoxyphenol), the main component of essential oil extracted from cloves, has various uses in medicine because of its potential to modulate neuronal excitability. \r\n\r\nHowever, its effects on the ionic mechanisms remains incompletely understood. \r\n\r\nObjectives: We aimed to investigate EUG`s effects on neuronal ionic currents and excitability, especially on voltage-gated ion currents, and to verify the effects on a hyperexcitability-temporal lobe seizure model. \r\n\r\nMethods: With the aid of patch-clamp technology, we first investigated the effects of EUG on ionic currents in NG108-15 neuronal cells differentiated with cyclic AMP. We then used modified Pinsky-Rinzel simulation modeling to evaluate its effects on spontaneous action potentials (APs). \r\n\r\nFinally, we investigated its effects on pilocarpine-induced seizures in rats. \r\n\r\nResults: EUG depressed the transient and late components of INa in the neurons. \r\n\r\nIt not only increased the degree of INa inactivation, but specifically suppressed the non-inactivating INa (INa(NI)). \r\n\r\n... In addition, EUG diminished L-type Ca2+ current and delayed rectifier K+ current only at higher concentrations. EUG`s effects on APs frequency reduction was verified by the simulation modeling. \r\n\r\nIn pilocarpine-induced seizures, the EUG-treated rats showed no shorter seizure latency but a lower seizure severity and mortality than the control rats. \r\n\r\n...\r\nConclusion: The synergistic blocking effects of INa and INa(NI) contributes to the main mechanism through which EUG affects the firing of neuronal APs and modulate neuronal hyperexcitability such as pilocarpine-induced temporal lobe seizures.\"",
- "tags": [
- {
- "id": 795,
- "tag": "ATP-senstive potassium current"
- },
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 739,
- "tag": "I Na,p"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 567,
- "tag": "Ion Channel Kinetics"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1600,
- "tag": "ModelDB:143253"
- },
- {
- "id": 569,
- "tag": "Simplified Models"
- },
- {
- "id": 759,
- "tag": "XPPAUT"
- }
- ],
- "timestamp_created": "2024-01-12 09:35:53.964933+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/143253",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1090": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1090,
- "name": "Spike repolarization in axon collaterals (Foust et al. 2011)",
- "repository_type": "github",
- "summary": "Voltage sensing dye experiments and simulations characterize the location and re-polarizing function of Kv1 channels in cortical neurons.\r\n\"... (the papers) results indicate that action potential-induced synaptic transmission may operate through a mix of analog\u2013digital transmission owing to the properties of Kv1 channels in axon collaterals and presynaptic boutons.\"",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 747,
- "tag": "I_KD"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1601,
- "tag": "ModelDB:143442"
- },
- {
- "id": 577,
- "tag": "NEURON"
- }
- ],
- "timestamp_created": "2024-01-12 09:35:54.493915+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/143442",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1091": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 1091,
- "name": "Simulations of oscillations in piriform cortex (Wilson & Bower 1992)",
- "repository_type": "github",
- "summary": "\"1. A large-scale computer model of the piriform cortex was\r\nconstructed on the basis of the known anatomic and physiological\r\norganization of this region.\r\n2. The oscillatory field potential and electroencephalographic\r\n(EEG) activity generated by the model was compared with actual\r\nphysiological results. The model was able to produce patterns of\r\nactivity similar to those recorded physiologically in response to\r\nboth weak and strong electrical shocks to the afferent input. The\r\nmodel also generated activity patterns similar to EEGs recorded in\r\nbehaving animals.\r\n3. ...\"",
- "tags": [
- {
- "id": 1546,
- "tag": "Evoked LFP"
- },
- {
- "id": 734,
- "tag": "Extracellular Fields"
- },
- {
- "id": 750,
- "tag": "GENESIS (web link to model)"
- },
- {
- "id": 765,
- "tag": "I Chloride"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1602,
- "tag": "ModelDB:143446"
- },
- {
- "id": 588,
- "tag": "Olfaction"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- }
- ],
- "timestamp_created": "2024-01-12 09:35:55.007237+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/143446",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1092": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 1092,
- "name": "Principles of Computational Modelling in Neuroscience (Book) (Sterratt et al. 2011)",
- "repository_type": "github",
- "summary": "\"... This book provides a step-by-step account of how to model the neuron and neural circuitry to understand the nervous system at all levels, from ion channels to networks. Starting with a simple model of the neuron as an electrical circuit, gradually more details are added to include the effects of neuronal morphology, synapses, ion channels and intracellular signaling. The principle of abstraction is explained through chapters on simplifying models, and how simplified models can be used in networks. This theme is continued in a final chapter on modeling the development of the nervous system. Requiring an elementary background in neuroscience and some high school mathematics, this textbook is an ideal basis for a course on computational neuroscience.\"",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 579,
- "tag": "Active Dendrites"
- },
- {
- "id": 566,
- "tag": "Bursting"
- },
- {
- "id": 572,
- "tag": "Calcium dynamics"
- },
- {
- "id": 831,
- "tag": "Deep brain stimulation"
- },
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1603,
- "tag": "ModelDB:143602"
- },
- {
- "id": 743,
- "tag": "NEURON (web link to model)"
- },
- {
- "id": 569,
- "tag": "Simplified Models"
- },
- {
- "id": 732,
- "tag": "Tutorial/Teaching"
- }
- ],
- "timestamp_created": "2024-01-12 09:35:55.577567+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/143602",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1093": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1093,
- "name": "Compartmentalization of GABAergic inhibition by dendritic spines (Chiu et al. 2013)",
- "repository_type": "github",
- "summary": "A spiny dendrite model supports the hypothesis that only inhibitory inputs on spine heads, not shafts, compartmentalizes inhibition of calcium signals to spine heads as seen in paired inhibition with back-propagating action potential experiments on prefrontal cortex layer 2/3 pyramidal neurons in mouse (Chiu et al. 2013).",
- "tags": [
- {
- "id": 565,
- "tag": "Dendritic Action Potentials"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 589,
- "tag": "I L high threshold"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 570,
- "tag": "Influence of Dendritic Geometry"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1604,
- "tag": "ModelDB:143604"
- },
- {
- "id": 577,
- "tag": "NEURON"
- }
- ],
- "timestamp_created": "2024-01-12 09:35:56.241383+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/143604",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1094": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1094,
- "name": "Thalamic network model of deep brain stimulation in essential tremor (Birdno et al. 2012)",
- "repository_type": "github",
- "summary": "\"... Thus the decreased effectiveness\r\nof temporally irregular DBS trains is due to long pauses in the\r\nstimulus trains, not the degree of temporal irregularity alone.\r\n\r\nWe also\r\nconducted computer simulations of neuronal responses to the experimental\r\nstimulus trains using a biophysical model of the thalamic\r\nnetwork.\r\n\r\nTrains that suppressed tremor in volunteers also suppressed\r\nfluctuations in thalamic transmembrane potential at the frequency\r\nassociated with cerebellar burst-driver inputs.\r\n\r\nClinical and computational\r\nfindings indicate that DBS suppresses tremor by masking burst-driver\r\ninputs to the thalamus and that pauses in stimulation prevent\r\nsuch masking. Although stimulation of other anatomic targets may\r\nprovide tremor suppression, we propose that the most relevant neuronal\r\ntargets for effective tremor suppression are the afferent cerebellar\r\nfibers that terminate in the thalamus.\"\r\n",
- "tags": [
- {
- "id": 727,
- "tag": "Action Potential Initiation"
- },
- {
- "id": 728,
- "tag": "Axonal Action Potentials"
- },
- {
- "id": 831,
- "tag": "Deep brain stimulation"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1605,
- "tag": "ModelDB:143633"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 720,
- "tag": "Temporal Pattern Generation"
- },
- {
- "id": 746,
- "tag": "Therapeutics"
- }
- ],
- "timestamp_created": "2024-01-12 09:35:56.749067+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/143633",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1095": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1095,
- "name": "Active dendritic action potential propagation (Casale & McCormick 2011)",
- "repository_type": "github",
- "summary": "This model explores the dendritic sodium and potassium conductances needed to recapitulate voltage-sensitive dye optical recordings of thalamic interneuron dendrites in the dorsal lateral geniculate nucleus. Model ion channels were selected based on pharmacological data.",
- "tags": [
- {
- "id": 1606,
- "tag": "Conductance distributions"
- },
- {
- "id": 565,
- "tag": "Dendritic Action Potentials"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 769,
- "tag": "I_KHT"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1607,
- "tag": "ModelDB:143635"
- },
- {
- "id": 577,
- "tag": "NEURON"
- }
- ],
- "timestamp_created": "2024-01-12 09:35:57.265590+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/143635",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1096": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1096,
- "name": "Simulations of motor unit discharge patterns (Powers et al. 2011)",
- "repository_type": "github",
- "summary": "\" ...\r\nTo estimate the potential contributions of PIC (Persistent Inward Current) activation and synaptic input patterns to\r\nmotor unit discharge patterns, we examined the responses of a set of cable\r\nmotoneuron models to different patterns of excitatory and inhibitory\r\ninputs.\r\n\r\nThe models were first tuned to approximate the current- and\r\nvoltage-clamp responses of low- and medium-threshold spinal motoneurons\r\nstudied in decerebrate cats and then driven with different patterns of\r\nexcitatory and inhibitory inputs.\r\n\r\nThe responses of the models to excitatory\r\ninputs reproduced a number of features of human motor unit\r\ndischarge.\r\n\r\nHowever, the pattern of rate modulation was strongly influenced\r\nby the temporal and spatial pattern of concurrent inhibitory inputs.\r\n\r\nThus, even though PIC activation is likely to exert a strong influence on\r\nfiring rate modulation, PIC activation in combination with different\r\npatterns of excitatory and inhibitory synaptic inputs can produce a wide\r\nvariety of motor unit discharge patterns.\"",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 566,
- "tag": "Bursting"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1608,
- "tag": "ModelDB:143671"
- },
- {
- "id": 577,
- "tag": "NEURON"
- }
- ],
- "timestamp_created": "2024-01-12 09:35:57.795181+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/143671",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1097": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1097,
- "name": "CA1 pyramidal neuron: depolarization block (Bianchi et al. 2012)",
- "repository_type": "github",
- "summary": "NEURON files from the paper: On the mechanisms underlying the depolarization block in the spiking dynamics of CA1 pyramidal neurons\r\nby D.Bianchi, A. Marasco, A.Limongiello, C.Marchetti, H.Marie,B.Tirozzi, M.Migliore (2012). J Comput. Neurosci. In press. DOI: 10.1007/s10827-012-0383-y.\r\nExperimental findings shown that under sustained input current of increasing strength neurons eventually stop firing, entering a depolarization block.\r\nWe analyze the spiking dynamics of CA1 pyramidal neuron models using the same set of ionic currents on both an accurate morphological reconstruction and on its reduction to a single-compartment.\r\n The results show the specic ion channel properties and kinetics that are needed to\r\nreproduce the experimental findings, and how their interplay can drastically modulate the neuronal dynamics and the input current range leading to depolarization block.",
- "tags": [
- {
- "id": 804,
- "tag": "Bifurcation"
- },
- {
- "id": 873,
- "tag": "Depolarization block"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 580,
- "tag": "I M"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 1433,
- "tag": "I_AHP"
- },
- {
- "id": 1609,
- "tag": "Mathematica"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1610,
- "tag": "ModelDB:143719"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 569,
- "tag": "Simplified Models"
- }
- ],
- "timestamp_created": "2024-01-12 09:35:58.398362+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/143719",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1098": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1098,
- "name": "Inhibitory plasticity balances excitation and inhibition (Vogels et al. 2011)",
- "repository_type": "github",
- "summary": "\"Cortical neurons receive balanced excitatory and inhibitory synaptic currents.\r\n\r\nSuch a balance could be\r\nestablished and maintained in an experience-dependent manner by synaptic plasticity at inhibitory\r\nsynapses.\r\n\r\nWe show that this mechanism provides an explanation for the sparse firing patterns observed\r\nin response to natural stimuli and fits well with a recently observed interaction of excitatory and\r\ninhibitory receptive field plasticity.\r\n\r\n...\r\nOur results suggest an essential\r\nrole of inhibitory plasticity in the formation and maintenance of functional cortical circuitry.\"",
- "tags": [
- {
- "id": 645,
- "tag": "Brian"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1611,
- "tag": "ModelDB:143751"
- },
- {
- "id": 620,
- "tag": "Python"
- },
- {
- "id": 802,
- "tag": "STDP"
- },
- {
- "id": 725,
- "tag": "Synaptic Plasticity"
- }
- ],
- "timestamp_created": "2024-01-12 09:35:58.988602+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/143751",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1099": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1099,
- "name": "Competition model of pheromone ratio detection (Zavada et al. 2011)",
- "repository_type": "github",
- "summary": "For some closely related sympatric moth species, recognizing a specific pheromone component concentration ratio is essential for mating success. We propose and test a minimalist competition-based feed-forward neuronal model capable of detecting a certain ratio of pheromone components independently of overall concentration. This model represents an elementary recognition unit for binary mixtures which we propose is entirely contained in the macroglomerular complex (MGC) of the male moth. A set of such units, along with projection neurons (PNs), can provide the input to higher brain centres. We found that (1) accuracy is mainly achieved by maintaining a certain ratio of connection strengths between olfactory receptor neurons (ORN) and local neurons (LN), much less by properties of the interconnections between the competing LNs proper. (2) successful ratio recognition is achieved using latency-to-first-spike in the LN populations which. (3) longer durations of the competition process between LNs did not result in higher recognition accuracy.",
- "tags": [
- {
- "id": 755,
- "tag": "C or Cplusplus program"
- },
- {
- "id": 1612,
- "tag": "CNrun"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1613,
- "tag": "ModelDB:143753"
- },
- {
- "id": 588,
- "tag": "Olfaction"
- },
- {
- "id": 758,
- "tag": "Sensory processing"
- },
- {
- "id": 569,
- "tag": "Simplified Models"
- },
- {
- "id": 542,
- "tag": "neuroConstruct"
- }
- ],
- "timestamp_created": "2024-01-12 09:35:59.545515+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/143753",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1100": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1100,
- "name": "Point process framework for modeling electrical stimulation of auditory nerve (Goldwyn et al. 2012)",
- "repository_type": "github",
- "summary": "A point process model of the auditory nerve that provides a compact and accurate description of neural responses to electric stimulation. Inspired by the framework of generalized linear models, the model consists of a cascade of linear and nonlinear stages. A semi-analytical procedure uniquely determines each parameter in the model on the basis of fundamental statistics from recordings of single fiber responses to electric stimulation, including threshold, relative spread, jitter, and chronaxie. The model also accounts for refractory and summation effects that influence the responses of auditory nerve fibers to high pulse rate stimulation.",
- "tags": [
- {
- "id": 762,
- "tag": "Audition"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1614,
- "tag": "ModelDB:143760"
- }
- ],
- "timestamp_created": "2024-01-12 09:36:00.118113+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/143760",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1101": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1101,
- "name": "Grid cell spatial firing models (Zilli 2012)",
- "repository_type": "github",
- "summary": "This package contains MATLAB implementations of most models (published from 2005 to 2011) of the hexagonal firing field arrangement of grid cells.",
- "tags": [
- {
- "id": 718,
- "tag": "Attractor Neural Network"
- },
- {
- "id": 1461,
- "tag": "Grid cell"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1615,
- "tag": "ModelDB:144006"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 800,
- "tag": "Spatial Navigation"
- }
- ],
- "timestamp_created": "2024-01-12 09:36:00.680413+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/144006",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1102": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1102,
- "name": "LGMD Variability and logarithmic compression in dendrites (Jones and Gabbiani, 2012, 2012B)",
- "repository_type": "github",
- "summary": "A compartmental model of the LGMD with a simplified, rake shaped, excitatory dendrite. It receives spontaneous input and excitatory and inhibitory synaptic inputs triggered by visual stimuli. It generates realistic responses to looming through the velocity dependent scaling and delay of individual excitatory synaptic inputs, with variability. We use the model to show that the key determinants of output variability are spontaneous input and temporal jitter of the excitatory inputs, rather than variability in magnitude of individual inputs (2012B, J Neurophysiol). We also use the model to analyze the transformation of the excitatory signals through the visual pathway; concluding that the representation of stimulus velocity is transformed from an expansive relationship at the level of the LGMD inputs to a logarithmic one at the level of its membrane potential (2012, J Neurosci).\r\n",
- "tags": [
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1616,
- "tag": "ModelDB:144007"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 758,
- "tag": "Sensory processing"
- },
- {
- "id": 726,
- "tag": "Vision"
- }
- ],
- "timestamp_created": "2024-01-12 09:36:01.262410+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/144007",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1103": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1103,
- "name": "Epileptic seizure model with Morris-Lecar neurons (Beverlin and Netoff 2011)",
- "repository_type": "github",
- "summary": "Here we use phase-response curves (PRC) from Morris-Lecar (M-L) model neurons with synaptic depression and gradually decrease input current to cells within a network simulation. This method effectively decreases firing rates resulting in a shift to greater network synchrony illustrating a possible mechanism of the transition phenomenon. PRCs are measured from the M-L conductance based model cell with a range of input currents within the limit cycle. A large network of 3000 excitatory neurons is simulated with a network topology generated from second-order statistics which allows a range of population synchrony. The population synchrony of the oscillating cells is measured with the Kuramoto order parameter, which reveals a transition from tonic to clonic phase exhibited by our model network.",
- "tags": [
- {
- "id": 469,
- "tag": "Epilepsy"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1617,
- "tag": "ModelDB:144010"
- }
- ],
- "timestamp_created": "2024-01-12 09:36:02.098213+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/144010",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1104": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1104,
- "name": "Perturbation sensitivity implies high noise and suggests rate coding in cortex (London et al. 2010)",
- "repository_type": "github",
- "summary": "\"... The network simulations\r\nwere also based on a previously published model(Latham et al. 2000), but with modifications to\r\nallow the addition and detection of extra spikes (see Supplementary Information,\r\nsection 7).\"",
- "tags": [
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 755,
- "tag": "C or Cplusplus program"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1618,
- "tag": "ModelDB:144027"
- }
- ],
- "timestamp_created": "2024-01-12 09:36:02.618150+00:00",
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- "name": "Synchrony by synapse location (McTavish et al. 2012)",
- "repository_type": "github",
- "summary": "This model considers synchrony between mitral cells induced via shared\r\ngranule cell interneurons while taking into account the spatial\r\nconstraints of the system. In particular, since inhibitory inputs\r\ndecay passively along the lateral dendrites, this model demonstrates\r\nthat an optimal arrangement of the inhibitory synapses will be near\r\nthe cell bodies of the relevant mitral cells.",
- "tags": [
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- "id": 590,
- "tag": "I A"
- },
- {
- "id": 576,
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- "tag": "Olfaction"
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- "tag": "Synchronization"
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- "timestamp_created": "2024-01-12 09:36:03.109476+00:00",
- "timestamp_updated": "---",
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- "name": "Layer V PFC pyramidal neuron used to study persistent activity (Sidiropoulou & Poirazi 2012)",
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- "summary": "\"... Here, we use a compartmental modeling approach to search for discriminatory features in the properties of incoming stimuli to a PFC pyramidal neuron and/or its response that signal which of these stimuli will result in persistent activity emergence. \r\n\r\nFurthermore, we use our modeling approach to study cell-type specific differences in persistent activity properties, via implementing a regular spiking (RS) and an intrinsic bursting (IB) model neuron. \r\n...\r\nCollectively, our results pinpoint to specific features of the neuronal response to a given stimulus that code for its ability to induce persistent activity and predict differential roles of RS and IB neurons in persistent activity expression.\r\n\"",
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- "id": 578,
- "tag": "Activity Patterns"
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- "tag": "Detailed Neuronal Models"
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- "timestamp_created": "2024-01-12 09:36:03.614270+00:00",
- "timestamp_updated": "---",
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- "name": "Surround Suppression in V1 via Withdraw of Balanced Local Excitation in V1 (Shushruth 2012)",
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- "summary": "The model is mean-field network models, which is set up as a so-called ring-model, i. e. it is a highly idealized model of an orientation hypercolumn in primary visual cortex. Long-range intra-areal and inter-areal feedback connections are modeled phenomenologically as an external input. In this model, there are recurrent interactions via short-range local connections between orientation columns, but not between hypercolumns.",
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- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
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- "id": 1621,
- "tag": "ModelDB:144096"
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- "id": 726,
- "tag": "Vision"
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- "timestamp_created": "2024-01-12 09:36:04.213666+00:00",
- "timestamp_updated": "---",
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- "modeling"
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- "id": 1108,
- "name": "Cortical pyramidal neuron, phase response curve (Stiefel et al 2009)",
- "repository_type": "github",
- "summary": "Three models of increasing complexity all showing a switch from type II (biphasic) to type I (monophasic) phase response curves with a cholinergic down-modulation of K+ conductances.",
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- "id": 736,
- "tag": "Action Potentials"
- },
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- "id": 580,
- "tag": "I M"
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- "id": 739,
- "tag": "I Na,p"
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- "id": 564,
- "tag": "ModelDB"
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- "id": 1622,
- "tag": "ModelDB:144372"
- },
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- "tag": "NEURON"
- }
- ],
- "timestamp_created": "2024-01-12 09:36:04.716920+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/144372",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "default_context": "master",
- "id": 1109,
- "name": "Hodgkin-Huxley model of persistent activity in PFC neurons (Winograd et al. 2008) (NEURON python)",
- "repository_type": "github",
- "summary": "The paper demonstrate a form of graded persistent activity activated by hyperpolarization. This phenomenon is modeled based on a slow calcium regulation of Ih, similar to that introduced\r\nearlier for thalamic neurons (see Destexhe et al., J Neurophysiol. 1996). The only difference is that the calcium signal is here provided by the high-threshold calcium current (instead of the low-threshold calcium current in thalamic neurons).",
- "tags": [
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 589,
- "tag": "I L high threshold"
- },
- {
- "id": 580,
- "tag": "I M"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 567,
- "tag": "Ion Channel Kinetics"
- },
- {
- "id": 564,
- "tag": "ModelDB"
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- {
- "id": 1623,
- "tag": "ModelDB:144376"
- },
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- "id": 577,
- "tag": "NEURON"
- }
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- "timestamp_created": "2024-01-12 09:36:05.275426+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/144376",
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- "email": "info@opensourcebrain.org",
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- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
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- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "id": 1110,
- "name": "A multiphysics neuron model for cellular volume dynamics (Lee et al. 2011)",
- "repository_type": "github",
- "summary": "This paper introduces a novel neuron model, where the cell volume is a time-varying variable and multiple physical principles are combined to build governing equations. Using this model, we analyzed neuronal volume responses during excitation, which elucidated the waveforms of fast intrinsic optical signals observed experimentally across the literature. In addition, we analyzed volume responses on a longer time scale with repetitive stimulation to study the characteristics of slow cell swelling.",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 1624,
- "tag": "Cellular volume dynamics"
- },
- {
- "id": 1531,
- "tag": "I Cl, leak"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 861,
- "tag": "I_K,Na"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1625,
- "tag": "ModelDB:144380"
- },
- {
- "id": 740,
- "tag": "Na/K pump"
- },
- {
- "id": 1626,
- "tag": "Osmosis-driven water flux"
- }
- ],
- "timestamp_created": "2024-01-12 09:36:06.049401+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/144380",
- "user": {
- "email": "info@opensourcebrain.org",
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- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "1111": {
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- "modeling"
- ],
- "default_context": "master",
- "id": 1111,
- "name": "Dendro-dendritic synaptic circuit (Shepherd Brayton 1979)",
- "repository_type": "github",
- "summary": "A NEURON simulation has been created to model the passive spread of an EPSP from a mitral cell synapse on a granule cell spine. The EPSP was shown to propagate subthreshold through the dendritic shaft into an adjacent spine with significant amplitude (figure 2B).",
- "tags": [
- {
- "id": 570,
- "tag": "Influence of Dendritic Geometry"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1627,
- "tag": "ModelDB:144385"
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- {
- "id": 577,
- "tag": "NEURON"
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- "id": 588,
- "tag": "Olfaction"
- }
- ],
- "timestamp_created": "2024-01-12 09:36:06.548526+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/144385",
- "user": {
- "email": "info@opensourcebrain.org",
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- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "default_context": "main",
- "id": 1112,
- "name": "Lobster STG pyloric network model with calcium sensor (Gunay & Prinz 2010) (Prinz et al. 2004)",
- "repository_type": "github",
- "summary": "This pyloric network model simulator is a C/C++ program that saves 384 different calcium sensor values that are candidates for activity sensors (Gunay and Prinz, 2010). The simulator was used to scan all of the 20 million pyloric network models that were previously collected in a database (Prinz et al, 2004).",
- "tags": [
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 566,
- "tag": "Bursting"
- },
- {
- "id": 776,
- "tag": "C or Cplusplus program (web link to model)"
- },
- {
- "id": 572,
- "tag": "Calcium dynamics"
- },
- {
- "id": 75,
- "tag": "Homeostasis"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 576,
- "tag": "I K"
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- "id": 581,
- "tag": "I K,Ca"
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- "id": 574,
- "tag": "I Na,t"
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- {
- "id": 564,
- "tag": "ModelDB"
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- {
- "id": 1628,
- "tag": "ModelDB:144387"
- }
- ],
- "timestamp_created": "2024-01-12 09:36:07.064363+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/144387",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "1113": {
- "auto_sync": true,
- "content_types": "modeling",
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- "modeling"
- ],
- "default_context": "master",
- "id": 1113,
- "name": "CA1 pyramidal neurons: effects of Kv7 (M-) channels on synaptic integration (Shah et al. 2011)",
- "repository_type": "github",
- "summary": "NEURON mod files from the paper:\r\nShah et al., 2011.\r\n\r\nIn this study, using a combination of electrophysiology\r\nand computational modelling, we show that these channels selectively influence peri-somatic but not dendritic post-synaptic excitatory synaptic potential (EPSP) integration in CA1 pyramidal cells. This may be important for their relative contributions to physiological processes such as synaptic plasticity as well as patho-physiological conditions such as epilepsy.",
- "tags": [
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 576,
- "tag": "I K"
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- {
- "id": 580,
- "tag": "I M"
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- "id": 574,
- "tag": "I Na,t"
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- {
- "id": 594,
- "tag": "I h"
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- "id": 1433,
- "tag": "I_AHP"
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- "id": 564,
- "tag": "ModelDB"
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- {
- "id": 1629,
- "tag": "ModelDB:144392"
- },
- {
- "id": 577,
- "tag": "NEURON"
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- {
- "id": 596,
- "tag": "Synaptic Integration"
- }
- ],
- "timestamp_created": "2024-01-12 09:36:07.577508+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/144392",
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- "email": "info@opensourcebrain.org",
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- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "content_types": "modeling",
- "content_types_list": [
- "modeling"
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- "default_context": "master",
- "id": 1114,
- "name": "CA1 pyramidal cell: reconstructed axonal arbor and failures at weak gap junctions (Vladimirov 2011)",
- "repository_type": "github",
- "summary": "Model of pyramidal CA1 cells connected by gap junctions in their axons.\r\nCell geometry is based on anatomical reconstruction of rat CA1 cell (NeuroMorpho.Org ID: NMO_00927) with long axonal arbor.\r\n\r\nModel init_2cells.hoc shows failures of second spike propagation in a spike doublet, depending on conductance of an axonal gap junction.\r\n\r\nModel init_ring.hoc shows that spike failure result in reentrant oscillations of a spike in a loop of axons connected by gap junctions, where one gap junction is weak.\r\n\r\nThe paper shows that in random networks of axons connected by gap junctions, oscillations are driven by single pacemaker loop of axons. The shortest loop, around which a spike can travel, is the most likely pacemaker.\r\nThis principle allows us to predict the frequency of oscillations from network connectivity and visa versa. We propose that this type of oscillations corresponds to so-called fast ripples in epileptic hippocampus.",
- "tags": [
- {
- "id": 728,
- "tag": "Axonal Action Potentials"
- },
- {
- "id": 745,
- "tag": "Conduction failure"
- },
- {
- "id": 469,
- "tag": "Epilepsy"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 580,
- "tag": "I M"
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- {
- "id": 574,
- "tag": "I Na,t"
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- "id": 584,
- "tag": "I Potassium"
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- "id": 564,
- "tag": "ModelDB"
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- {
- "id": 1630,
- "tag": "ModelDB:144401"
- },
- {
- "id": 577,
- "tag": "NEURON"
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- {
- "id": 585,
- "tag": "Oscillations"
- }
- ],
- "timestamp_created": "2024-01-12 09:36:08.095133+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/144401",
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- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "auto_sync": true,
- "content_types": "modeling",
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- "modeling"
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- "default_context": "master",
- "id": 1115,
- "name": "A Moth MGC Model-A HH network with quantitative rate reduction (Buckley & Nowotny 2011)",
- "repository_type": "github",
- "summary": "We provide the model used in Buckley & Nowotny (2011). It consists of a network of Hodgkin Huxley neurons coupled by slow GABA_B synapses which is run alongside a quantitative reduction described in the associated paper.",
- "tags": [
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 804,
- "tag": "Bifurcation"
- },
- {
- "id": 755,
- "tag": "C or Cplusplus program"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 591,
- "tag": "I K,leak"
- },
- {
- "id": 580,
- "tag": "I M"
- },
- {
- "id": 1532,
- "tag": "I Na, leak"
- },
- {
- "id": 843,
- "tag": "I Q"
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- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1631,
- "tag": "ModelDB:144403"
- },
- {
- "id": 866,
- "tag": "Multiscale"
- }
- ],
- "timestamp_created": "2024-01-12 09:36:08.772458+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/144403",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1116": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
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- "default_context": "master",
- "id": 1116,
- "name": "Cerebellar gain and timing control model (Yamazaki & Tanaka 2007)(Yamazaki & Nagao 2012)",
- "repository_type": "github",
- "summary": "This paper proposes a hypothetical computational mechanism for unified gain and timing control in the cerebellum. The hypothesis is justified by computer simulations of a large-scale spiking network model of the cerebellum.",
- "tags": [
- {
- "id": 755,
- "tag": "C or Cplusplus program"
- },
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 825,
- "tag": "Learning"
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- {
- "id": 564,
- "tag": "ModelDB"
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- {
- "id": 1632,
- "tag": "ModelDB:144416"
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- {
- "id": 758,
- "tag": "Sensory processing"
- },
- {
- "id": 587,
- "tag": "Spatio-temporal Activity Patterns"
- }
- ],
- "timestamp_created": "2024-01-12 09:36:09.350427+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/144416",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "auto_sync": true,
- "content_types": "modeling",
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- "modeling"
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- "default_context": "master",
- "id": 1117,
- "name": "Linear vs non-linear integration in CA1 oblique dendrites (G\u00f3mez Gonz\u00e1lez et al. 2011)",
- "repository_type": "github",
- "summary": "The hippocampus in well known for its role in learning and memory processes. The CA1 region is the output of the hippocampal formation and pyramidal neurons in this region are the elementary units responsible for the processing and transfer of information to the cortex. Using this detailed single neuron model, it is investigated the conditions under which individual CA1 pyramidal neurons process incoming information in a complex (non-linear) as opposed to a passive (linear) manner.\r\nThis detailed compartmental model of a CA1 pyramidal neuron is based on one described previously (Poirazi, 2003). The model was adapted to five different reconstructed morphologies for this study, and slightly modified to fit the experimental data of (Losonczy, 2006), and to incorporate evidence in pyramidal neurons for the non-saturation of NMDA receptor-mediated conductances by single glutamate pulses. We first replicate the main findings of (Losonczy, 2006), including the very brief window for nonlinear integration using single-pulse stimuli. We then show that double-pulse stimuli increase a CA1 pyramidal neuron\u2019s tolerance for input asynchrony by at last an order of magnitude. Therefore, it is shown using this model, that the time window for nonlinear integration is extended by more than an order of magnitude when inputs are short bursts as opposed to single spikes.\r\n",
- "tags": [
- {
- "id": 579,
- "tag": "Active Dendrites"
- },
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 731,
- "tag": "I CAN"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 739,
- "tag": "I Na,p"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 1433,
- "tag": "I_AHP"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1633,
- "tag": "ModelDB:144450"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 596,
- "tag": "Synaptic Integration"
- }
- ],
- "timestamp_created": "2024-01-12 09:36:09.857361+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/144450",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1118": {
- "auto_sync": true,
- "content_types": "modeling",
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- "modeling"
- ],
- "default_context": "master",
- "id": 1118,
- "name": "Connection-set Algebra (CSA) for the representation of connectivity in NN models (Djurfeldt 2012)",
- "repository_type": "github",
- "summary": "\"The connection-set algebra (CSA) is a novel\r\nand general formalism for the description of connectivity\r\nin neuronal network models, from small-scale to\r\nlarge-scale structure. ... The expressiveness of CSA\r\nmakes prototyping of network structure easy. A C++\r\nversion of the algebra has been implemented and used\r\nin a large-scale neuronal network simulation (Djurfeldt\r\net al., IBM J Res Dev 52(1/2):31\u201342, 2008b) and an\r\nimplementation in Python has been publicly released.\"",
- "tags": [
- {
- "id": 755,
- "tag": "C or Cplusplus program"
- },
- {
- "id": 756,
- "tag": "Methods"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1634,
- "tag": "ModelDB:144455"
- },
- {
- "id": 620,
- "tag": "Python"
- }
- ],
- "timestamp_created": "2024-01-12 09:36:10.365976+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/144455",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1119": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1119,
- "name": "CA1 pyramidal neuron dendritic spine with plasticity (O`Donnell et al. 2011)",
- "repository_type": "github",
- "summary": "Biophysical model of a dendritic spine and adjacent dendrite with synapse. Model parameters adjusted to fit CA3-CA1 Shaffer collateral synapse data from literature. Model includes both electrical and Ca2+ dynamics, including AMPARs, NMDARs, 4 types of CaV channel, and leak conductance. Spine and synapse are plastic according to Ca2+ dependent rule.\r\n\r\nThe aim of the model is to explore the effects of dendritic spine structural plasticity on the rules of synaptic plasticity.",
- "tags": [
- {
- "id": 572,
- "tag": "Calcium dynamics"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1635,
- "tag": "ModelDB:144463"
- },
- {
- "id": 725,
- "tag": "Synaptic Plasticity"
- }
- ],
- "timestamp_created": "2024-01-12 09:36:10.879597+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/144463",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1120": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1120,
- "name": "Markov Chain-based Stochastic Shielding Hodgkin Huxley Model (Schmandt, Galan 2012)",
- "repository_type": "github",
- "summary": "Markov Chain-based Stochastic Shielding Hodgkin Huxley Model (Schmandt, Galan 2012)",
- "tags": [
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 567,
- "tag": "Ion Channel Kinetics"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 756,
- "tag": "Methods"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1636,
- "tag": "ModelDB:144468"
- }
- ],
- "timestamp_created": "2024-01-12 09:39:32.390588+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/144468",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1121": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1121,
- "name": "Functional consequences of cortical circuit abnormalities on gamma in schizophrenia (Spencer 2009)",
- "repository_type": "github",
- "summary": "\"Schizophrenia is characterized by cortical circuit abnormalities, which might be reflected in\r\ngamma-frequency (30\u2013100 Hz) oscillations in the electroencephalogram. Here we used a computational\r\nmodel of cortical circuitry to examine the effects that neural circuit abnormalities might have\r\non gamma generation and network excitability. The model network consisted of 1000 leaky integrateand-\r\nfi re neurons with realistic connectivity patterns and proportions of neuron types [pyramidal\r\ncells (PCs), regular-spiking inhibitory interneurons, and fast-spiking interneurons (FSIs)].\r\n...\r\nThe results of this study suggest that a multimodal\r\napproach, combining non-invasive neurophysiological and structural measures, might be\r\nable to distinguish between different neural circuit abnormalities in schizophrenia patients.\r\n...\"\r\n",
- "tags": [
- {
- "id": 1527,
- "tag": "Brain Rhythms"
- },
- {
- "id": 1637,
- "tag": "IDL"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1638,
- "tag": "ModelDB:144477"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 845,
- "tag": "Schizophrenia"
- },
- {
- "id": 569,
- "tag": "Simplified Models"
- }
- ],
- "timestamp_created": "2024-01-12 09:39:33.024284+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/144477",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1122": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1122,
- "name": "Nodes of Ranvier with left-shifted Nav channels (Boucher et al. 2012)",
- "repository_type": "github",
- "summary": "The two programs CLSRanvier.f and propagation.f simulate the excitability of a myelinated axon with injured nodes of Ranvier.\r\nThe injury is simulated as the Coupled Left Shift (CLS) of the activation(V) and inactivation(V) (availability) of a fraction of Nav channels.",
- "tags": [
- {
- "id": 727,
- "tag": "Action Potential Initiation"
- },
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 745,
- "tag": "Conduction failure"
- },
- {
- "id": 873,
- "tag": "Depolarization block"
- },
- {
- "id": 710,
- "tag": "FORTRAN"
- },
- {
- "id": 75,
- "tag": "Homeostasis"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 591,
- "tag": "I K,leak"
- },
- {
- "id": 1532,
- "tag": "I Na, leak"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1639,
- "tag": "ModelDB:144481"
- },
- {
- "id": 740,
- "tag": "Na/K pump"
- },
- {
- "id": 787,
- "tag": "Pathophysiology"
- },
- {
- "id": 741,
- "tag": "Sodium pump"
- }
- ],
- "timestamp_created": "2024-01-12 09:39:33.639779+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/144481",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1123": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1123,
- "name": "Pyramidal neuron conductances state and STDP (Delgado et al. 2010)",
- "repository_type": "github",
- "summary": "Neocortical neurons in vivo process each of their individual inputs in the context of ongoing synaptic background activity, produced by the thousands of presynaptic partners a typical neuron has. That background activity affects multiple aspects of neuronal and network function. However, its effect on the induction of spike-timing dependent plasticity (STDP) is not clear.\r\nUsing the present biophysically-detailed computational model, it is not only able to replicate the conductance-dependent shunting of dendritic potentials (Delgado et al,2010), but show that synaptic background can truncate calcium dynamics within dendritic spines, in a way that affects potentiation more strongly than depression.\r\nThis program uses a simplified layer 2/3 pyramidal neuron constructed in NEURON.\r\nIt was similar to the model of Traub et al., J Neurophysiol. (2003), and consisted of a soma, an apical shaft, distal dendrites, five basal dendrites, an axon, and a single spine. The spine\u2019s location was variable along the apical shaft (initial 50 μm) and apical. The axon contained an axon hillock region, an initial segment, segments with myelin, and nodes of Ranvier, in order to have realistic action potential generation. For more information about the model see supplemental material, Delgado et al 2010.",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 762,
- "tag": "Audition"
- },
- {
- "id": 572,
- "tag": "Calcium dynamics"
- },
- {
- "id": 1606,
- "tag": "Conductance distributions"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 739,
- "tag": "I Na,p"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 1433,
- "tag": "I_AHP"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1640,
- "tag": "ModelDB:144482"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 802,
- "tag": "STDP"
- }
- ],
- "timestamp_created": "2024-01-12 09:39:34.164589+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/144482",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1124": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1124,
- "name": "Reflected SDE Hodgkin-Huxley Model (Dangerfield et al. 2012)",
- "repository_type": "github",
- "summary": "Matlab code for simulating channel noise using the original Hodgkin-Huxley equations and a variant of the Hodkgin-Huxley model from (Bruce, Annals Bio Eng, Vol 36, pp 824-838, 2009). Methods used in simulation are SSA, SDE method and RSDE method.",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 567,
- "tag": "Ion Channel Kinetics"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1641,
- "tag": "ModelDB:144489"
- }
- ],
- "timestamp_created": "2024-01-12 09:39:34.706979+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/144489",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1125": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1125,
- "name": "CA1 pyramidal neuron: synaptically-induced bAP predicts synapse location (Sterratt et al. 2012)",
- "repository_type": "github",
- "summary": "This is an adaptation of Poirazi et al.'s (2003) CA1 model that is used to measure BAP-induced voltage and calcium signals in spines after simulated Schaffer\r\ncollateral synapse stimulation. In the model, the peak calcium concentration is highly\r\ncorrelated with soma-synapse distance under a number of physiologically-realistic\r\nsuprathreshold stimulation regimes and for a range of dendritic morphologies. There are also simulations demonstrating that peak calcium can be used to set up a synaptic democracy\r\nin a homeostatic manner, whereby synapses regulate their synaptic strength on the\r\nbasis of the difference between peak calcium and a uniform target value.",
- "tags": [
- {
- "id": 565,
- "tag": "Dendritic Action Potentials"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 589,
- "tag": "I L high threshold"
- },
- {
- "id": 580,
- "tag": "I M"
- },
- {
- "id": 805,
- "tag": "I Mixed"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 844,
- "tag": "I R"
- },
- {
- "id": 575,
- "tag": "I T low threshold"
- },
- {
- "id": 1433,
- "tag": "I_AHP"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1642,
- "tag": "ModelDB:144490"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 725,
- "tag": "Synaptic Plasticity"
- }
- ],
- "timestamp_created": "2024-01-12 09:39:35.221601+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/144490",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1126": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1126,
- "name": "Stochastic versions of the Hodgkin-Huxley equations (Goldwyn, Shea-Brown 2011) (pylab)",
- "repository_type": "github",
- "summary": "A pylab version from Alan Leggitt for simulating different channel noise models using the Hodgkin-Huxley equations. Methods provided and reviewed in Goldwyn and Shea-Brown (2011) are: current noise, subunit noise, conductance noise, and Markov chain, as well as the standard deterministic Hodgkin-Huxley model.",
- "tags": [
- {
- "id": 727,
- "tag": "Action Potential Initiation"
- },
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 567,
- "tag": "Ion Channel Kinetics"
- },
- {
- "id": 748,
- "tag": "Markov-type model"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1643,
- "tag": "ModelDB:144499"
- },
- {
- "id": 620,
- "tag": "Python"
- }
- ],
- "timestamp_created": "2024-01-12 09:39:35.749349+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/144499",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1127": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1127,
- "name": "Inferior Olive, subthreshold oscillations (Torben-Nielsen, Segev, Yarom 2012)",
- "repository_type": "github",
- "summary": "The Inferior Olive is a brain structure in which neurons are solely connected to each other through gap-junctions. Its behavior is characterized by spontaneous subthreshold oscillation, frequency changes in the subthreshold oscillation, stable phase differences between neurons, and propagating waves of activity.\r\n\r\nOur model based on actual IO topology can reproduce these behaviors and provides a mechanistic explanation thereof.",
- "tags": [
- {
- "id": 575,
- "tag": "I T low threshold"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1644,
- "tag": "ModelDB:144502"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- }
- ],
- "timestamp_created": "2024-01-12 09:39:36.279155+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/144502",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1128": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1128,
- "name": "Duration-tuned neurons from the inferior colliculus of the big brown bat (Aubie et al. 2009)",
- "repository_type": "github",
- "summary": "dtnet is a generalized neural network simulator written in C++ with an easy to use XML description language to generate arbitrary neural networks and then run simulations covering many different parameter values. For example, you can specify ranges of parameter values for several different connection weights and then automatically run simulations over all possible parameters. Graphing ability is built in as long as the free, open-source, graphing application GLE (http://glx.sourceforge.net/) is installed.\r\n\r\nIncluded in the examples folder are simulation descriptions that were used to generate the results in Aubie et al. (2009). Refer to the README file for instructions on compiling and running these examples.\r\n\r\nThe most recent source code can be obtained from GitHub: https://github.com/baubie/dtnet\r\n",
- "tags": [
- {
- "id": 755,
- "tag": "C or Cplusplus program"
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- "id": 595,
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- "id": 754,
- "tag": "Delay"
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- "id": 564,
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- "tag": "ModelDB:144509"
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- "tag": "Rebound firing"
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- "tag": "Simplified Models"
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- "timestamp_created": "2024-01-12 09:39:36.773134+00:00",
- "timestamp_updated": "---",
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- "name": "Duration-tuned neurons from the inferior colliculus of vertebrates (Aubie et al. 2012)",
- "repository_type": "github",
- "summary": "These models reproduce the responses of duration-tuned neurons in the auditory midbrain of the big brown bat, the rat, the mouse and the frog (Aubie et al. 2012). They are written in the Python interface to NEURON and a subset of the figures from Aubie et al. (2012) are pre-set in run.py (raw data is generated and a separate graphing program must be used to visualize the results).",
- "tags": [
- {
- "id": 762,
- "tag": "Audition"
- },
- {
- "id": 595,
- "tag": "Coincidence Detection"
- },
- {
- "id": 1646,
- "tag": "Duration Selectivity"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
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- "id": 564,
- "tag": "ModelDB"
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- "id": 1647,
- "tag": "ModelDB:144511"
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- "tag": "NEURON"
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- "id": 620,
- "tag": "Python"
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- "id": 758,
- "tag": "Sensory processing"
- },
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- "id": 569,
- "tag": "Simplified Models"
- }
- ],
- "timestamp_created": "2024-01-12 09:39:37.299339+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/144511",
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- "id": 1130,
- "name": "Half-center oscillator database of leech heart interneuron model (Doloc-Mihu & Calabrese 2011)",
- "repository_type": "github",
- "summary": "We have created a database (HCO-db) of instances of a half-center oscillator computational model [Hill et al., 2001] for analyzing how neuronal parameters influence network activity. We systematically explored the parameter space of about 10.4 million simulated HCO instances and corresponding isolated neuron model simulations obtained by varying a set of selected parameters (maximal conductance of intrinsic and synaptic currents) in all combinations using a brute-force approach. We classified these HCO instances by their activity characteristics into identifiable groups. We built an efficient relational database table (HCO-db) with the resulting instances characteristics.",
- "tags": [
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 566,
- "tag": "Bursting"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 739,
- "tag": "I Na,p"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 594,
- "tag": "I h"
- },
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- "id": 729,
- "tag": "Invertebrate"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1648,
- "tag": "ModelDB:144518"
- },
- {
- "id": 1649,
- "tag": "MySQL (web link to model)"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- }
- ],
- "timestamp_created": "2024-01-12 09:39:37.851607+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/144518",
- "user": {
- "email": "info@opensourcebrain.org",
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- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "id": 1131,
- "name": "Cardiac action potentials and pacemaker activity of sinoatrial node (DiFrancesco & Noble 1985)",
- "repository_type": "github",
- "summary": "\"Equations have been developed to describe cardiac action potentials and pacemaker activity. The model takes account of extensive developments in experimental work ...\"",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
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- "id": 1650,
- "tag": "ModelDB:144520"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 738,
- "tag": "Na/Ca exchanger"
- },
- {
- "id": 740,
- "tag": "Na/K pump"
- }
- ],
- "timestamp_created": "2024-01-12 09:39:38.383877+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/144520",
- "user": {
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- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- ],
- "default_context": "master",
- "id": 1132,
- "name": "STD-dependent and independent encoding of Input irregularity as spike rate (Luthman et al. 2011)",
- "repository_type": "github",
- "summary": "\"... We use a\r\nconductance-based model of a CN neuron to study the\r\neffect of the regularity of Purkinje cell spiking on CN\r\nneuron activity.\r\n\r\nWe find that increasing the irregularity of\r\nPurkinje cell activity accelerates the CN neuron spike rate\r\nand that the mechanism of this recoding of input irregularity\r\nas output spike rate depends on the number of Purkinje\r\ncells converging onto a CN neuron.\r\n...\"\r\n",
- "tags": [
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 589,
- "tag": "I L high threshold"
- },
- {
- "id": 739,
- "tag": "I Na,p"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 575,
- "tag": "I T low threshold"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1651,
- "tag": "ModelDB:144523"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 724,
- "tag": "Short-term Synaptic Plasticity"
- },
- {
- "id": 720,
- "tag": "Temporal Pattern Generation"
- }
- ],
- "timestamp_created": "2024-01-12 09:39:38.964969+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/144523",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "auto_sync": true,
- "content_types": "modeling",
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- "modeling"
- ],
- "default_context": "master",
- "id": 1133,
- "name": "State and location dependence of action potential metabolic cost (Hallermann et al., 2012)",
- "repository_type": "github",
- "summary": "With this model of a layer 5 pyramidal neuron the state and location dependence of the ATP usage and the metabolic efficiency of action potentials can be analyzed. Model parameters were constrained by direct subcellular recordings at dendritic, somatic and axonal compartments.",
- "tags": [
- {
- "id": 727,
- "tag": "Action Potential Initiation"
- },
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1652,
- "tag": "ModelDB:144526"
- },
- {
- "id": 577,
- "tag": "NEURON"
- }
- ],
- "timestamp_created": "2024-01-12 09:39:39.561309+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/144526",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
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- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1134,
- "name": "Reinforcement learning of targeted movement (Chadderdon et al. 2012)",
- "repository_type": "github",
- "summary": "\"Sensorimotor control has traditionally been considered from a control theory perspective, without relation to neurobiology. In contrast, here we utilized a spiking-neuron model of motor cortex and trained it to perform a simple movement task, which consisted of rotating a single-joint \u201cforearm\u201d to a target. Learning was based on a reinforcement mechanism analogous to that of the dopamine system. This provided a global reward or punishment signal in response to decreasing or increasing distance from hand to target, respectively. Output was partially driven by Poisson motor babbling, creating stochastic movements that could then be shaped by learning. The virtual forearm consisted of a single segment rotated around an elbow joint, controlled by flexor and extensor muscles. ...\"",
- "tags": [
- {
- "id": 749,
- "tag": "Long-term Synaptic Plasticity"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1653,
- "tag": "ModelDB:144538"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 809,
- "tag": "Reinforcement Learning"
- },
- {
- "id": 859,
- "tag": "Reward-modulated STDP"
- },
- {
- "id": 569,
- "tag": "Simplified Models"
- },
- {
- "id": 725,
- "tag": "Synaptic Plasticity"
- }
- ],
- "timestamp_created": "2024-01-12 09:39:40.270090+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/144538",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1135,
- "name": "CA1 pyramidal neuron: Ih current (Migliore et al. 2012)",
- "repository_type": "github",
- "summary": "NEURON files from the paper:\r\nMigliore M, Migliore R (2012) Know Your Current Ih: Interaction with a Shunting Current Explains the Puzzling Effects of Its Pharmacological or\r\nPathological Modulations. PLoS ONE 7(5): e36867.\r\ndoi:10.1371/journal.pone.0036867.\r\n\r\n\r\nExperimental findings on the effects of Ih current modulation, which is particularly involved in epilepsy, appear to be inconsistent. In the paper, using a realistic model we show how and why a shunting current, such as that carried by TASK-like channels, dependent on the Ih peak conductance is able to explain virtually all experimental findings on Ih up- or down-regulation by modulators or pathological conditions.\r\n",
- "tags": [
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 469,
- "tag": "Epilepsy"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 580,
- "tag": "I M"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1654,
- "tag": "ModelDB:144541"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 596,
- "tag": "Synaptic Integration"
- }
- ],
- "timestamp_created": "2024-01-12 09:39:40.904809+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/144541",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
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- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1136,
- "name": "Hopfield and Brody model (Hopfield, Brody 2000) (NEURON+python)",
- "repository_type": "github",
- "summary": "Demonstration of Hopfield-Brody snychronization using artificial cells in NEURON+python.",
- "tags": [
- {
- "id": 718,
- "tag": "Attractor Neural Network"
- },
- {
- "id": 595,
- "tag": "Coincidence Detection"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1655,
- "tag": "ModelDB:144549"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 719,
- "tag": "Pattern Recognition"
- },
- {
- "id": 620,
- "tag": "Python"
- },
- {
- "id": 586,
- "tag": "Synchronization"
- },
- {
- "id": 720,
- "tag": "Temporal Pattern Generation"
- }
- ],
- "timestamp_created": "2024-01-12 09:39:41.514973+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/144549",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1137": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1137,
- "name": "Rhesus Monkey Layer 3 Pyramidal Neurons: V1 vs PFC (Amatrudo, Weaver et al. 2012)",
- "repository_type": "github",
- "summary": "Whole-cell patch-clamp recordings and high-resolution 3D morphometric analyses of layer 3 pyramidal neurons in in vitro slices of monkey primary visual cortex (V1) and dorsolateral granular prefrontal cortex (dlPFC) revealed that neurons in these two brain areas possess highly distinctive structural and functional properties. ... Three-dimensional reconstructions of V1 and dlPFC neurons were incorporated into computational models containing Hodgkin-Huxley and AMPA- and GABAA-receptor gated channels. Morphology alone largely accounted for observed passive physiological properties, but led to AP firing rates that differed more than observed empirically, and to synaptic responses that opposed empirical results. Accordingly, modeling predicts that active channel conductances differ between V1 and dlPFC neurons. The unique features of V1 and dlPFC neurons are likely fundamental\r\ndeterminants of area-specific network behavior. The compact electrotonic arbor and increased excitability of V1 neurons support the rapid signal integration required for early processing of visual information. The greater connectivity and dendritic complexity of dlPFC neurons likely\r\nsupport higher level cognitive functions including working memory and planning.",
- "tags": [
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 1606,
- "tag": "Conductance distributions"
- },
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 786,
- "tag": "Electrotonus"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 721,
- "tag": "I N"
- },
- {
- "id": 570,
- "tag": "Influence of Dendritic Geometry"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1656,
- "tag": "ModelDB:144553"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 726,
- "tag": "Vision"
- }
- ],
- "timestamp_created": "2024-01-12 09:39:42.069629+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/144553",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1138": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1138,
- "name": "Computing with neural synchrony (Brette 2012)",
- "repository_type": "github",
- "summary": "\"... In a heterogeneous neural population, it appears that synchrony patterns represent structure or sensory invariants in stimuli, which can then be detected by postsynaptic neurons. The required neural circuitry can spontaneously emerge with spike-timing-dependent plasticity. Using examples in different sensory modalities, I show that this allows simple neural circuits to extract relevant information from realistic sensory stimuli, for example to identify a fluctuating odor in the presence of distractors. ...\"",
- "tags": [
- {
- "id": 645,
- "tag": "Brian"
- },
- {
- "id": 75,
- "tag": "Homeostasis"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1657,
- "tag": "ModelDB:144560"
- },
- {
- "id": 588,
- "tag": "Olfaction"
- },
- {
- "id": 620,
- "tag": "Python"
- },
- {
- "id": 573,
- "tag": "Rebound firing"
- },
- {
- "id": 862,
- "tag": "Reliability"
- },
- {
- "id": 802,
- "tag": "STDP"
- },
- {
- "id": 569,
- "tag": "Simplified Models"
- },
- {
- "id": 725,
- "tag": "Synaptic Plasticity"
- },
- {
- "id": 586,
- "tag": "Synchronization"
- }
- ],
- "timestamp_created": "2024-01-12 09:39:42.578429+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/144560",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1139": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1139,
- "name": "Voltage-based STDP synapse (Clopath et al. 2010)",
- "repository_type": "github",
- "summary": "Implementation of the STDP rule by Clopath et al., Nat. Neurosci. 13(3):344-352,2010\r\nSTDP mechanism added to the AlphaSynapse in NEURON.",
- "tags": [
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1658,
- "tag": "ModelDB:144566"
- },
- {
- "id": 577,
- "tag": "NEURON"
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- {
- "id": 620,
- "tag": "Python"
- },
- {
- "id": 802,
- "tag": "STDP"
- }
- ],
- "timestamp_created": "2024-01-12 09:39:43.408703+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/144566",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "modeling"
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- "default_context": "master",
- "id": 1140,
- "name": "Large scale model of the olfactory bulb (Yu et al., 2013)",
- "repository_type": "github",
- "summary": "The readme file currently contains links to the results for all the 72 odors investigated in the paper, and the movie showing the network activity during learning of odor k3-3 (an aliphatic ketone).\r\n",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 579,
- "tag": "Active Dendrites"
- },
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 566,
- "tag": "Bursting"
- },
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1659,
- "tag": "ModelDB:144570"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 588,
- "tag": "Olfaction"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 719,
- "tag": "Pattern Recognition"
- },
- {
- "id": 596,
- "tag": "Synaptic Integration"
- },
- {
- "id": 725,
- "tag": "Synaptic Plasticity"
- },
- {
- "id": 586,
- "tag": "Synchronization"
- },
- {
- "id": 720,
- "tag": "Temporal Pattern Generation"
- },
- {
- "id": 803,
- "tag": "Unsupervised Learning"
- }
- ],
- "timestamp_created": "2024-01-12 09:39:43.991915+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/144570",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "1141": {
- "auto_sync": true,
- "content_types": "modeling",
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- "modeling"
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- "default_context": "master",
- "id": 1141,
- "name": "Thalamic neuron, zebra finch DLM: Integration of pallidal and cortical inputs (Goldberg et al. 2012)",
- "repository_type": "github",
- "summary": "This is a single-compartment model of a zebra finch thalamic relay neuron from nucleus DLM. It is used to explore the interaction between cortex-like glutamatergic input and pallidum-like GABAergic input as they control the spiking output of these neurons.",
- "tags": [
- {
- "id": 1609,
- "tag": "Mathematica"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1660,
- "tag": "ModelDB:144572"
- },
- {
- "id": 573,
- "tag": "Rebound firing"
- },
- {
- "id": 596,
- "tag": "Synaptic Integration"
- }
- ],
- "timestamp_created": "2024-01-12 09:39:44.541948+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/144572",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "auto_sync": true,
- "content_types": "modeling",
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- "modeling"
- ],
- "default_context": "master",
- "id": 1142,
- "name": "Parametric computation and persistent gamma in a cortical model (Chambers et al. 2012)",
- "repository_type": "github",
- "summary": "Using the Traub et al (2005) model of the cortex we determined how 33 synaptic strength parameters control gamma oscillations. We used fractional factorial design to reduce the number of runs required to 4096. We found an expected multiplicative interaction between parameters.",
- "tags": [
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 591,
- "tag": "I K,leak"
- },
- {
- "id": 861,
- "tag": "I_K,Na"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1661,
- "tag": "ModelDB:144579"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 863,
- "tag": "Parameter sensitivity"
- }
- ],
- "timestamp_created": "2024-01-12 09:39:45.058119+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/144579",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1143": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1143,
- "name": "Boolean network-based analysis of the apoptosis network (Mai and Liu 2009)",
- "repository_type": "github",
- "summary": "\"To understand the design principles of the molecular interaction network associated with the\r\nirreversibility of cell apoptosis and the stability of cell surviving, we constructed a Boolean network integrating both the intrinsic and extrinsic pro-apoptotic pathways with pro-survival signal transduction pathways.\r\nWe performed statistical analyses of the dependences of cell fate on initial\r\nstates and on input signals.\r\nThe analyses reproduced the well-known pro- and anti-apoptotic effects of\r\nkey external signals and network components. We found that the external GF signal by itself did not change the apoptotic ratio from randomly chosen initial states when there is no external TNF signal, but can significantly offset apoptosis induced by the TNF signal. ...\"",
- "tags": [
- {
- "id": 1662,
- "tag": "Apoptosis"
- },
- {
- "id": 1663,
- "tag": "Boolean network"
- },
- {
- "id": 756,
- "tag": "Methods"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1664,
- "tag": "ModelDB:144586"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 620,
- "tag": "Python"
- },
- {
- "id": 751,
- "tag": "Signaling pathways"
- }
- ],
- "timestamp_created": "2024-01-12 09:39:45.575666+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/144586",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1144": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1144,
- "name": "Modulation of hippocampal rhythms by electric fields and network topology (Berzhanskaya et al. 2013)",
- "repository_type": "github",
- "summary": "\u201c\u2026 Here we present experimental and computational evidence of the interplay among hippocampal synaptic circuitry, neuronal morphology, external electric fields, and network activity.\r\n\r\nElectrophysiological data are used to constrain and validate an anatomically and biophysically realistic model of area CA1 containing pyramidal cells and two interneuron types: dendritic- and perisomatic-targeting.\r\n\r\nWe report two lines of results: addressing the network structure capable of generating theta-modulated gamma rhythms, and demonstrating electric field effects on those rhythms. First, theta-modulated gamma rhythms require specific inhibitory connectivity.\r\n\r\n\u2026\r\n\r\nThe second major finding is that subthreshold electric fields robustly alter the balance between different rhythms.\r\n\r\n\u2026\u201d",
- "tags": [
- {
- "id": 1527,
- "tag": "Brain Rhythms"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1665,
- "tag": "ModelDB:144589"
- },
- {
- "id": 577,
- "tag": "NEURON"
- }
- ],
- "timestamp_created": "2024-01-12 09:39:46.107602+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/144589",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1145": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1145,
- "name": "Network model with dynamic ion concentrations (Ullah et al. 2009)",
- "repository_type": "github",
- "summary": "This is a network model composed of 100 excitatory and 100 inhibitory neurons with dynamic ion concentrations as described in \"The Influence of Sodium and Potassium Dynamics on Excitability, Seizures, and the Stability of Persistent States: II. Network and Glia Dynamics (2009) Journal of Computational Neuroscience, 26:171-183\".",
- "tags": [
- {
- "id": 469,
- "tag": "Epilepsy"
- },
- {
- "id": 710,
- "tag": "FORTRAN"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1666,
- "tag": "ModelDB:144590"
- }
- ],
- "timestamp_created": "2024-01-12 09:39:46.615752+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/144590",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1146": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1146,
- "name": "CA1 pyramidal neurons: effects of Alzheimer (Culmone and Migliore 2012)",
- "repository_type": "github",
- "summary": "The model predicts possible therapeutic treatments of Alzheimers's Disease in terms of pharmacological manipulations of channels' kinetic and activation properties. The results suggest how and which mechanism can be targeted by a drug to restore the original firing conditions. The simulations reproduce somatic membrane potential in control conditions, when 90% of membrane is affected by AD (Fig.4A of the paper), and after treatment (Fig.4B of the paper).\r\n",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 579,
- "tag": "Active Dendrites"
- },
- {
- "id": 827,
- "tag": "Aging/Alzheimer`s"
- },
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1667,
- "tag": "ModelDB:144976"
- },
- {
- "id": 577,
- "tag": "NEURON"
- }
- ],
- "timestamp_created": "2024-01-12 09:39:47.118727+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/144976",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1147": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1147,
- "name": "Method for deriving general HH neuron model`s spiking input-output relation (Soudry & Meir 2014)",
- "repository_type": "github",
- "summary": "We derived in paper a method to find semi-analytic input-output relations for general HH-like neuron models (firing rates, spectra, linear filters)under sparse spike stimulation. Here we demonstrate the applicability of this method to various HH-type models (HH with slow sodium inactivation, with slow pottasium inactivation, with synaptic STD and other various extensions).",
- "tags": [
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 756,
- "tag": "Methods"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1668,
- "tag": "ModelDB:144993"
- }
- ],
- "timestamp_created": "2024-01-12 09:39:47.611114+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/144993",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1148": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1148,
- "name": "Hypocretin and Locus Coeruleus model neurons (Carter et al 2012)",
- "repository_type": "github",
- "summary": "Conductance based model of the hypocretin neurons (HCRT) and another one of the Locus Coeruleus one (LC). The HCRT drive the LCs via the HCRT receptor on the LCs. The LCs lead to the awakening of the mice if the number of spikes raises over 10 spikes in 10 seconds window.",
- "tags": [
- {
- "id": 755,
- "tag": "C or Cplusplus program"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 575,
- "tag": "I T low threshold"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1669,
- "tag": "ModelDB:145162"
- }
- ],
- "timestamp_created": "2024-01-12 09:39:48.180474+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/145162",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1149": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1149,
- "name": "Neurophysiological impact of inactivation pathways in A-type K+ channels (Fineberg et al 2012)",
- "repository_type": "github",
- "summary": "These models predict the differential effects of varying pathways of inactivation (closed state inactivation, CSI, or open state inactivation, OSI). Specifically, Markov models of Kv4 potassium channels with CSI or CSI+OSI were inserted into the CA1 pyramidal neuron model from Migliore et al (1999; ModelDB accession #2796) to determine the neurophysiological impact of inactivation pathways. Furthermore, Markov models of Kv4.2 and Kv3.4 channels are used to illustrate a method by which to test what pathway of inactivation a channel uses.",
- "tags": [
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 567,
- "tag": "Ion Channel Kinetics"
- },
- {
- "id": 1670,
- "tag": "IonChannelLab"
- },
- {
- "id": 748,
- "tag": "Markov-type model"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1671,
- "tag": "ModelDB:145672"
- },
- {
- "id": 577,
- "tag": "NEURON"
- }
- ],
- "timestamp_created": "2024-01-12 09:39:48.686222+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/145672",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1150": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1150,
- "name": "Circadian clock model based on protein sequestration (simple version) (Kim & Forger 2012)",
- "repository_type": "github",
- "summary": "\"\u2026 To understand the biochemical mechanisms of this timekeeping, we have developed a detailed mathematical model of the mammalian circadian clock. \r\n\r\nOur model can accurately predict diverse experimental data including the phenotypes of mutations or knockdown of clock genes as well as the time courses and relative expression of clock transcripts and proteins. \r\n\r\nUsing this model, we show how a universal motif of circadian timekeeping, where repressors tightly bind activators rather than directly binding to DNA, can generate oscillations when activators and repressors are in stoichiometric balance. \r\n\u2026\"",
- "tags": [
- {
- "id": 755,
- "tag": "C or Cplusplus program"
- },
- {
- "id": 1586,
- "tag": "Circadian Rhythms"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 1609,
- "tag": "Mathematica"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1672,
- "tag": "ModelDB:145800"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 704,
- "tag": "SBML"
- },
- {
- "id": 569,
- "tag": "Simplified Models"
- },
- {
- "id": 759,
- "tag": "XPPAUT"
- }
- ],
- "timestamp_created": "2024-01-12 09:39:49.301782+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/145800",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1151": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1151,
- "name": "Circadian clock model in mammals (detailed version) (Kim & Forger 2012)",
- "repository_type": "github",
- "summary": "\"\u2026 To understand the biochemical mechanisms of this timekeeping, we have developed a detailed mathematical model of the mammalian circadian clock. \r\n\r\nOur model can accurately predict diverse experimental data including the phenotypes of mutations or knockdown of clock genes as well as the time courses and relative expression of clock transcripts and proteins. \r\n\r\nUsing this model, we show how a universal motif of circadian timekeeping, where repressors tightly bind activators rather than directly binding to DNA, can generate oscillations when activators and repressors are in stoichiometric balance. \r\n\u2026\"",
- "tags": [
- {
- "id": 1527,
- "tag": "Brain Rhythms"
- },
- {
- "id": 1586,
- "tag": "Circadian Rhythms"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 1609,
- "tag": "Mathematica"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1673,
- "tag": "ModelDB:145801"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 759,
- "tag": "XPPAUT"
- }
- ],
- "timestamp_created": "2024-01-12 09:39:49.797670+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/145801",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1152": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1152,
- "name": "Oversampling method to extract excitatory and inhibitory conductances (Bedard et al. 2012)",
- "repository_type": "github",
- "summary": "\" ...\r\nWe present here a new method that allows\r\nextracting estimates of the full time course of excitatory and inhibitory conductances from single-trial\r\nVm recordings.\r\n\r\nThis method is based on oversampling of the Vm . We test the method numerically using\r\nmodels of increasing complexity.\r\n\r\nFinally, the method is evaluated using controlled conductance injection\r\nin cortical neurons in vitro using the dynamic-clamp technique.\r\n...\"",
- "tags": [
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 756,
- "tag": "Methods"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1674,
- "tag": "ModelDB:145803"
- },
- {
- "id": 568,
- "tag": "Parameter Fitting"
- }
- ],
- "timestamp_created": "2024-01-12 09:39:50.310006+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/145803",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1153": {
- "auto_sync": true,
- "content_types": "modeling",
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- "modeling"
- ],
- "default_context": "master",
- "id": 1153,
- "name": "A fast model of voltage-dependent NMDA Receptors (Moradi et al. 2013)",
- "repository_type": "github",
- "summary": "These are two or triple-exponential models of the voltage-dependent NMDA receptors. Conductance of these receptors increase voltage-dependently with a \"Hodgkin and Huxley-type\" gating style that is also depending on glutamate-binding. Time course of the gating of these receptors in response to glutamate are also changing voltage-dependently. Temperature sensitivity and desensitization of these receptor are also taken into account.\r\nThree previous kinetic models that are able to simulate the voltage-dependence of the NMDARs are also imported to the NMODL. These models are not temperature sensitive. \r\n\r\nThese models are compatible with the \"event delivery system\" of NEURON. Parameters that are reported in our paper are applicable to CA1 pyramidal cell dendrites.",
- "tags": [
- {
- "id": 567,
- "tag": "Ion Channel Kinetics"
- },
- {
- "id": 749,
- "tag": "Long-term Synaptic Plasticity"
- },
- {
- "id": 756,
- "tag": "Methods"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1675,
- "tag": "ModelDB:145836"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 569,
- "tag": "Simplified Models"
- }
- ],
- "timestamp_created": "2024-01-12 09:39:51.240755+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/145836",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1154": {
- "auto_sync": true,
- "content_types": "modeling",
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- "modeling"
- ],
- "default_context": "main",
- "id": 1154,
- "name": "A CORF computational model of a simple cell that relies on LGN input (Azzopardi & Petkov 2012)",
- "repository_type": "github",
- "summary": "\"...\r\n\r\nWe propose a computational model that uses as afferent inputs the responses of model LGN cells with center-surround receptive fields (RFs) and we refer to it as a Combination of Receptive Fields (CORF) model. \r\n\r\nWe use shifted gratings as test stimuli and simulated reverse correlation to explore the nature of the proposed model. \r\n\r\nWe study its behavior regarding the effect of contrast on its response and orientation bandwidth as well as the effect of an orthogonal mask on the response to an optimally oriented stimulus.\r\n\r\nWe also evaluate and compare the performances of the CORF and GF (Gabor Filter) models regarding contour detection, using two public data sets of images of natural scenes with associated contour ground truths.\r\n\r\n...\r\n\r\nThe proposed CORF model is more realistic than the GF model and is more effective in contour detection, which is assumed to be the primary biological role of simple cells.\"",
- "tags": [
- {
- "id": 767,
- "tag": "MATLAB (web link to model)"
- },
- {
- "id": 756,
- "tag": "Methods"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1676,
- "tag": "ModelDB:145882"
- },
- {
- "id": 569,
- "tag": "Simplified Models"
- }
- ],
- "timestamp_created": "2024-01-12 09:39:51.867258+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/145882",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1155": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1155,
- "name": "NMDA subunit effects on Calcium and STDP (Evans et al. 2012)",
- "repository_type": "github",
- "summary": "Effect of NMDA subunit on spike timing dependent plasticity.",
- "tags": [
- {
- "id": 572,
- "tag": "Calcium dynamics"
- },
- {
- "id": 600,
- "tag": "GENESIS"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 730,
- "tag": "I A, slow"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 589,
- "tag": "I L high threshold"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 575,
- "tag": "I T low threshold"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1677,
- "tag": "ModelDB:145917"
- },
- {
- "id": 802,
- "tag": "STDP"
- }
- ],
- "timestamp_created": "2024-01-12 09:39:52.410637+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/145917",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1156": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1156,
- "name": "A generic MAPK cascade model for random parameter sampling analysis (Mai and Liu 2013)",
- "repository_type": "github",
- "summary": "A generic three-tier MAPK cascade model constructed by comparing previous MAPK models covering a range of biosystems. Pseudo parameters and random sampling were employed for qualitative analysis. A range of kinetic behaviors of MAPK activation, including ultrasensitivity, bistability, transient activation and oscillation, were successfully reproduced in this generic model. The mechanisms were revealed by statistic analysis of the parameter sets.",
- "tags": [
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 756,
- "tag": "Methods"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1678,
- "tag": "ModelDB:146024"
- }
- ],
- "timestamp_created": "2024-01-12 09:39:52.941607+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/146024",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1157": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1157,
- "name": "A set of reduced models of layer 5 pyramidal neurons (Bahl et al. 2012)",
- "repository_type": "github",
- "summary": "These are the NEURON files for 10 different models of a reduced L5 pyramidal neuron. The parameters were obtained by automatically fitting the models to experimental data using a multi objective evolutionary search strategy. Details on the algorithm can be found at \r\nhttp://www.g-node.org/emoo and in Bahl et al. (2012).\r\n",
- "tags": [
- {
- "id": 727,
- "tag": "Action Potential Initiation"
- },
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 579,
- "tag": "Active Dendrites"
- },
- {
- "id": 572,
- "tag": "Calcium dynamics"
- },
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 730,
- "tag": "I A, slow"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 580,
- "tag": "I M"
- },
- {
- "id": 739,
- "tag": "I Na,p"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 756,
- "tag": "Methods"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1679,
- "tag": "ModelDB:146026"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 568,
- "tag": "Parameter Fitting"
- },
- {
- "id": 569,
- "tag": "Simplified Models"
- }
- ],
- "timestamp_created": "2024-01-12 09:39:53.550742+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/146026",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1158": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1158,
- "name": "Olfactory bulb mitral cell gap junction NN model: burst firing and synchrony (O`Connor et al. 2012)",
- "repository_type": "github",
- "summary": "In a network of 6 mitral cells connected by gap junction in the apical dendrite tuft, continuous current injections of 0.06 nA are injected into 20 locations in the apical tufts of two of the mitral cells. The current injections into one of the cells starts 10 ms after the other to generate asynchronous firing in the cells (Migliore et al. 2005 protocol). Firing of the cells is asynchronous for the first 120 ms. However after the burst firing phase is completed the firing in all cells becomes synchronous.",
- "tags": [
- {
- "id": 579,
- "tag": "Active Dendrites"
- },
- {
- "id": 566,
- "tag": "Bursting"
- },
- {
- "id": 572,
- "tag": "Calcium dynamics"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 589,
- "tag": "I L high threshold"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 570,
- "tag": "Influence of Dendritic Geometry"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1680,
- "tag": "ModelDB:146030"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 588,
- "tag": "Olfaction"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 586,
- "tag": "Synchronization"
- }
- ],
- "timestamp_created": "2024-01-12 09:39:54.101276+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/146030",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1159": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1159,
- "name": "Opponent-channel model of the cortical representation of auditory space (Briley et al., 2012)",
- "repository_type": "github",
- "summary": "This is the computational opponent-channel model used by Briley et al. (2012) to model electroencephalographic (EEG) responses from human auditory cortex to abrupt shifts in sound-source location and to predict psychophysical measures of spatial acuity. The zip file contains both a Matlab and an Excel implementation of the model. Details of use are contained within each file.",
- "tags": [
- {
- "id": 762,
- "tag": "Audition"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1681,
- "tag": "ModelDB:146050"
- },
- {
- "id": 758,
- "tag": "Sensory processing"
- }
- ],
- "timestamp_created": "2024-01-12 09:39:54.624411+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/146050",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1160": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1160,
- "name": "Ca1 pyramidal neuron: reduction model (Marasco et al. 2012)",
- "repository_type": "github",
- "summary": "\"... Here we introduce a new, automatic and fast method to map realistic neurons into equivalent reduced models running up to >40 times faster while maintaining a very high accuracy of the membrane potential dynamics during synaptic inputs, and a direct link with experimental observables. The mapping of arbitrary sets of synaptic inputs, without additional fine tuning, would also allow the convenient and efficient implementation of a new generation of large-scale simulations of brain regions reproducing the biological variability observed in real neurons, with unprecedented advances to understand higher brain functions.\"",
- "tags": [
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1682,
- "tag": "ModelDB:146376"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 569,
- "tag": "Simplified Models"
- }
- ],
- "timestamp_created": "2024-01-12 09:39:55.139961+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/146376",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1161": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1161,
- "name": "Mean Field Equations for Two-Dimensional Integrate and Fire Models (Nicola and Campbell, 2013)",
- "repository_type": "github",
- "summary": "The zip file contains the files used to perform numerical simulation and bifurcation studies of large networks of two-dimensional integrate and fire neurons and of the corresponding mean field models derived in our paper. The neural models used are the Izhikevich model and the Adaptive Exponential model.",
- "tags": [
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 756,
- "tag": "Methods"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1683,
- "tag": "ModelDB:146499"
- }
- ],
- "timestamp_created": "2024-01-12 09:39:55.667146+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/146499",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1162": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1162,
- "name": "Paradoxical GABA-mediated excitation (Lewin et al. 2012)",
- "repository_type": "github",
- "summary": "\"GABA is the key inhibitory neurotransmitter in the adult central nervous system, but in some circumstances can lead to a paradoxical excitation that has been causally implicated in diverse pathologies from endocrine stress responses to diseases of excitability including neuropathic pain and temporal lobe epilepsy. \r\n\r\nWe undertook a computational modeling approach to determine plausible ionic mechanisms of GABAA-dependent excitation in isolated post-synaptic CA1 hippocampal neurons because it may constitute a trigger for pathological synchronous epileptiform discharge. \r\n\r\nIn particular, the interplay intracellular chloride accumulation via the GABAA receptor and extracellular potassium accumulation via the K/Cl co-transporter KCC2 in promoting GABAA-mediated excitation is complex. \r\n...\"",
- "tags": [
- {
- "id": 566,
- "tag": "Bursting"
- },
- {
- "id": 755,
- "tag": "C or Cplusplus program"
- },
- {
- "id": 1684,
- "tag": "Ca pump"
- },
- {
- "id": 572,
- "tag": "Calcium dynamics"
- },
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 469,
- "tag": "Epilepsy"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 589,
- "tag": "I L high threshold"
- },
- {
- "id": 580,
- "tag": "I M"
- },
- {
- "id": 739,
- "tag": "I Na,p"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 575,
- "tag": "I T low threshold"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 1685,
- "tag": "KCC2"
- },
- {
- "id": 748,
- "tag": "Markov-type model"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1686,
- "tag": "ModelDB:146504"
- },
- {
- "id": 1687,
- "tag": "NKCC1"
- },
- {
- "id": 738,
- "tag": "Na/Ca exchanger"
- },
- {
- "id": 740,
- "tag": "Na/K pump"
- }
- ],
- "timestamp_created": "2024-01-12 09:39:56.224379+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/146504",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1163": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1163,
- "name": "Functional impact of dendritic branch point morphology (Ferrante et al., 2013)",
- "repository_type": "github",
- "summary": "\" ... Here, we first quantified the morphological variability of branch points from two-photon images of rat CA1 pyramidal neurons. We then investigated the geometrical features affecting spike initiation, propagation, and timing with a computational model validated by glutamate uncaging experiments. The results suggest that even subtle membrane readjustments at branch point could drastically alter the ability of synaptic input to generate, propagate, and time action potentials.\"",
- "tags": [
- {
- "id": 727,
- "tag": "Action Potential Initiation"
- },
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 579,
- "tag": "Active Dendrites"
- },
- {
- "id": 804,
- "tag": "Bifurcation"
- },
- {
- "id": 745,
- "tag": "Conduction failure"
- },
- {
- "id": 565,
- "tag": "Dendritic Action Potentials"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 570,
- "tag": "Influence of Dendritic Geometry"
- },
- {
- "id": 1478,
- "tag": "Information transfer"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1688,
- "tag": "ModelDB:146509"
- },
- {
- "id": 577,
- "tag": "NEURON"
- }
- ],
- "timestamp_created": "2024-01-12 09:39:56.900594+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/146509",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1164": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1164,
- "name": "Reconstrucing sleep dynamics with data assimilation (Sedigh-Sarvestani et al., 2012)",
- "repository_type": "github",
- "summary": "We have developed a framework, based on the unscented Kalman filter, for estimating hidden states and parameters of a network model of sleep. The network model includes firing rates and neurotransmitter output of 5 cell-groups in the rat brain.",
- "tags": [
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1689,
- "tag": "ModelDB:146554"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 568,
- "tag": "Parameter Fitting"
- },
- {
- "id": 592,
- "tag": "Sleep"
- },
- {
- "id": 732,
- "tag": "Tutorial/Teaching"
- },
- {
- "id": 1690,
- "tag": "unscented Kalman filter"
- }
- ],
- "timestamp_created": "2024-01-12 09:39:57.497382+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/146554",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1165": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1165,
- "name": "Nonlinear dendritic processing in barrel cortex spiny stellate neurons (Lavzin et al. 2012)",
- "repository_type": "github",
- "summary": "This is a multi-compartmental simulation of a spiny stellate neuron which is stimulated by a thalamocortical (TC) and cortico-cortical (CC) inputs. No other cells are explicitly modeled; the presynaptic network activation is represented by the number of active synapses. Preferred and non \u2013preferred thalamic directions thus correspond to larder/smaller number of TC synapses. This simulation revealed that randomly activated synapses can cooperatively trigger global NMDA spikes, which involve participation of most of the dendritic tree. Surprisingly, we found that although the voltage profile of the cell was uniform, the calcium influx was restricted to \u2018hot spots\u2019 which correspond to synaptic clusters or large conductance synapses",
- "tags": [
- {
- "id": 579,
- "tag": "Active Dendrites"
- },
- {
- "id": 1684,
- "tag": "Ca pump"
- },
- {
- "id": 572,
- "tag": "Calcium dynamics"
- },
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 860,
- "tag": "Direction Selectivity"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1691,
- "tag": "ModelDB:146565"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 596,
- "tag": "Synaptic Integration"
- },
- {
- "id": 1507,
- "tag": "Whisking"
- }
- ],
- "timestamp_created": "2024-01-12 09:39:58.143979+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/146565",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1166": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1166,
- "name": "Olfactory bulb network: neurogenetic restructuring and odor decorrelation (Chow et al. 2012)",
- "repository_type": "github",
- "summary": "Adult neurogenesis in the olfactory bulb has been shown experimentally\r\nto contribute to perceptual learning. Using a computational network\r\nmodel we show that fundamental aspects of the adult neurogenesis\r\nobserved in the olfactory bulb -- the persistent addition of new\r\ninhibitory granule cells to the network, their activity-dependent\r\nsurvival, and the reciprocal character of their synapses with the\r\nprincipal mitral cells -- are sufficient to restructure the network\r\nand to alter its encoding of odor stimuli adaptively so as to reduce\r\nthe correlations between the bulbar representations of similar\r\nstimuli. The model captures the experimentally observed\r\nrole of neurogenesis in perceptual learning and the enhanced response\r\nof young granule cells to novel stimuli. Moreover, it makes specific\r\npredictions for the type of odor enrichment that should be effective\r\nin enhancing the ability of animals to discriminate similar odor\r\nmixtures. NSF grant DMS-0719944.\r\n",
- "tags": [
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 1662,
- "tag": "Apoptosis"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1692,
- "tag": "ModelDB:146583"
- },
- {
- "id": 1693,
- "tag": "Neurogenesis"
- },
- {
- "id": 588,
- "tag": "Olfaction"
- },
- {
- "id": 791,
- "tag": "Rate-coding model neurons"
- },
- {
- "id": 758,
- "tag": "Sensory processing"
- }
- ],
- "timestamp_created": "2024-01-12 09:39:58.652137+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/146583",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1167": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1167,
- "name": "Modeling the effects of dopamine on network synchronization (Komek et al. 2012)",
- "repository_type": "github",
- "summary": "Dopamine modulates cortical circuit activity in part through its actions on GABAergic interneurons, including increasing the excitability of fast-spiking interneurons. Though such effects have been demonstrated in single cells, there are no studies that examine how such mechanisms may lead to the effects of dopamine at a neural network level. In this study, we investigated the effects of dopamine on synchronization in two simulated neural networks; one biophysical model composed of Wang-Buzsaki neurons and a reduced model with theta neurons. In both models, we show that parametrically varying the levels of dopamine, modeled through the changes in the excitability of interneurons, reveals an inverted-U shaped relationship, with low gamma band power at both low and high dopamine levels and optimal synchronization at intermediate levels. Moreover, such a relationship holds when the external input is both tonic and periodic at gamma band range. Together, our results indicate that dopamine can modulate cortical gamma band synchrony in an inverted-U fashion and that the physiologic effects of dopamine on single fast-spiking interneurons can give rise to such non-monotonic effects at the network level.",
- "tags": [
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1694,
- "tag": "ModelDB:146734"
- },
- {
- "id": 586,
- "tag": "Synchronization"
- },
- {
- "id": 759,
- "tag": "XPPAUT"
- }
- ],
- "timestamp_created": "2024-01-12 09:39:59.331023+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/146734",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1168": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1168,
- "name": "ACh modulation in olfactory bulb and piriform cortex (de Almeida et al. 2013;Devore S, et al. 2014)",
- "repository_type": "github",
- "summary": "This matlab code was used in the papers de Almeida, Idiart and Linster, (2013), Devore S, de Almeida L, Linster C (2014) .\r\nThis work uses a computational model of the OB and PC and their common cholinergic inputs to investigate how bulbar cholinergic modulation affects cortical odor processing.",
- "tags": [
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1695,
- "tag": "ModelDB:146813"
- },
- {
- "id": 874,
- "tag": "Noise Sensitivity"
- },
- {
- "id": 588,
- "tag": "Olfaction"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 725,
- "tag": "Synaptic Plasticity"
- },
- {
- "id": 586,
- "tag": "Synchronization"
- }
- ],
- "timestamp_created": "2024-01-12 09:40:00.128228+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/146813",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1169": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1169,
- "name": "Motor cortex microcircuit simulation based on brain activity mapping (Chadderdon et al. 2014)",
- "repository_type": "github",
- "summary": "\"...\r\nWe developed a computational\r\nmodel based primarily on a unified set of brain activity mapping\r\nstudies of mouse M1.\r\nThe simulation consisted of 775 spiking neurons of\r\n10 cell types with detailed population-to-population connectivity.\r\n\r\nStatic\r\nanalysis of connectivity with graph-theoretic tools revealed that the corticostriatal\r\npopulation showed strong centrality, suggesting that would\r\nprovide a network hub.\r\n...\r\nBy demonstrating the effectiveness of combined static\r\nand dynamic analysis, our results show how static brain maps can be\r\nrelated to the results of brain activity mapping.\"",
- "tags": [
- {
- "id": 856,
- "tag": "Laminar Connectivity"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1696,
- "tag": "ModelDB:146949"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- }
- ],
- "timestamp_created": "2024-01-12 09:40:00.760287+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/146949",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1170": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1170,
- "name": "Constructed Tessellated Neuronal Geometries (CTNG) (McDougal et al. 2013)",
- "repository_type": "github",
- "summary": "We present an algorithm to form watertight 3D surfaces consistent with\r\nthe point-and-diameter based neuronal morphology descriptions widely\r\nused with spatial electrophysiology simulators.\r\n\r\n...\r\n\r\nThis (point-and-diameter)\r\nrepresentation is well-suited for electrophysiology simulations, where\r\nthe space constants are larger than geometric ambiguities. However,\r\nthe simple interpretations used for pure electrophysiological\r\nsimulation produce geometries unsuitable for multi-scale models that\r\nalso involve three-dimensional reaction\u2013diffusion, as such models have\r\nsmaller space constants.\r\n\r\n...\r\n\r\nAlthough one cannot exactly reproduce an\r\noriginal neuron's full shape from point-and-diameter data, our new\r\nconstructive tessellated neuronal geometry (CTNG) algorithm uses\r\nconstructive solid geometry to define a plausible reconstruction\r\nwithout gaps or cul-de-sacs.\r\n\r\nCTNG then uses \u201cconstructive cubes\u201d to\r\nproduce a watertight triangular mesh of the neuron surface, suitable\r\nfor use in reaction\u2013diffusion simulations.\r\n...\"",
- "tags": [
- {
- "id": 755,
- "tag": "C or Cplusplus program"
- },
- {
- "id": 1697,
- "tag": "Cython"
- },
- {
- "id": 756,
- "tag": "Methods"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1698,
- "tag": "ModelDB:146950"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 620,
- "tag": "Python"
- }
- ],
- "timestamp_created": "2024-01-12 09:40:01.259052+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/146950",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1171": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1171,
- "name": "Motion Clouds: Synthesis of random textures for motion perception (Leon et al. 2012)",
- "repository_type": "github",
- "summary": "We describe a framework to generate random texture movies with controlled information content. In particular, these stimuli can be made closer to naturalistic textures compared to usual stimuli such as gratings and random-dot kinetograms. We simplified the definition to parametrically define these \"Motion Clouds\" around the most prevalent feature axis (mean and bandwith): direction, spatial frequency, orientation.",
- "tags": [
- {
- "id": 1466,
- "tag": "Envelope synthesis"
- },
- {
- "id": 756,
- "tag": "Methods"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1699,
- "tag": "ModelDB:146953"
- },
- {
- "id": 1700,
- "tag": "Motion Detection"
- },
- {
- "id": 874,
- "tag": "Noise Sensitivity"
- },
- {
- "id": 568,
- "tag": "Parameter Fitting"
- },
- {
- "id": 719,
- "tag": "Pattern Recognition"
- },
- {
- "id": 850,
- "tag": "Perceptual Categories"
- },
- {
- "id": 620,
- "tag": "Python"
- },
- {
- "id": 758,
- "tag": "Sensory processing"
- },
- {
- "id": 587,
- "tag": "Spatio-temporal Activity Patterns"
- },
- {
- "id": 720,
- "tag": "Temporal Pattern Generation"
- }
- ],
- "timestamp_created": "2024-01-12 09:40:01.810345+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/146953",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1172": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1172,
- "name": "A large-scale model of the functioning brain (spaun) (Eliasmith et al. 2012)",
- "repository_type": "github",
- "summary": "\" ... In this work, we present a\r\n2.5-million-neuron model of the brain (called \u201cSpaun\u201d) that bridges this gap (between neural activity and biological function) by exhibiting many different\r\nbehaviors. The model is presented only with visual image sequences, and it draws all of its responses with\r\na physically modeled arm. Although simplified, the model captures many aspects of neuroanatomy,\r\nneurophysiology, and psychological behavior, which we demonstrate via eight diverse tasks.\"",
- "tags": [
- {
- "id": 825,
- "tag": "Learning"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1701,
- "tag": "ModelDB:147103"
- },
- {
- "id": 678,
- "tag": "Nengo"
- },
- {
- "id": 809,
- "tag": "Reinforcement Learning"
- },
- {
- "id": 726,
- "tag": "Vision"
- }
- ],
- "timestamp_created": "2024-01-12 09:40:02.343828+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/147103",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1173": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1173,
- "name": "Structure-dynamics relationships in bursting neuronal networks revealed (M\u00e4ki-Marttunen et al. 2013)",
- "repository_type": "github",
- "summary": "This entry includes tools for generating and analyzing network structure, and for running the neuronal network simulations on them.",
- "tags": [
- {
- "id": 566,
- "tag": "Bursting"
- },
- {
- "id": 855,
- "tag": "Connectivity matrix"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 591,
- "tag": "I K,leak"
- },
- {
- "id": 580,
- "tag": "I M"
- },
- {
- "id": 739,
- "tag": "I Na,p"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 756,
- "tag": "Methods"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1702,
- "tag": "ModelDB:147117"
- },
- {
- "id": 611,
- "tag": "NEST"
- },
- {
- "id": 620,
- "tag": "Python"
- },
- {
- "id": 724,
- "tag": "Short-term Synaptic Plasticity"
- },
- {
- "id": 586,
- "tag": "Synchronization"
- }
- ],
- "timestamp_created": "2024-01-12 09:40:02.869356+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/147117",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1174": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1174,
- "name": "Synaptic scaling balances learning in a spiking model of neocortex (Rowan & Neymotin 2013)",
- "repository_type": "github",
- "summary": "Learning in the brain requires complementary mechanisms: potentiation and activity-dependent homeostatic scaling. We introduce synaptic scaling to a biologically-realistic spiking model of neocortex which can learn changes in oscillatory rhythms using STDP, and show that scaling is necessary to balance both positive and negative changes in input from potentiation and atrophy. We discuss some of the issues that arise when considering synaptic scaling in such a model, and show that scaling regulates activity whilst allowing learning to remain unaltered.",
- "tags": [
- {
- "id": 75,
- "tag": "Homeostasis"
- },
- {
- "id": 825,
- "tag": "Learning"
- },
- {
- "id": 749,
- "tag": "Long-term Synaptic Plasticity"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1703,
- "tag": "ModelDB:147141"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 620,
- "tag": "Python"
- },
- {
- "id": 802,
- "tag": "STDP"
- },
- {
- "id": 725,
- "tag": "Synaptic Plasticity"
- }
- ],
- "timestamp_created": "2024-01-12 09:40:03.439537+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/147141",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1175": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1175,
- "name": "Biophysical model for field potentials of networks of I&F neurons (beim Graben & Serafim 2013)",
- "repository_type": "github",
- "summary": "\"...\r\nStarting from a reduced three-compartment model of a single pyramidal neuron, we derive an observation model for dendritic dipole currents in extracellular space and thereby for the dendritic field potential (DFP) that contributes to the local field potential (LFP) of a neural population. \r\n...\r\nOur reduced three-compartment scheme allows to derive networks of leaky integrate-and-fire (LIF) models, which facilitates comparison with existing neural network and observation models. \r\n...\"",
- "tags": [
- {
- "id": 645,
- "tag": "Brian"
- },
- {
- "id": 734,
- "tag": "Extracellular Fields"
- },
- {
- "id": 564,
- "tag": "ModelDB"
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- {
- "id": 1704,
- "tag": "ModelDB:147172"
- },
- {
- "id": 620,
- "tag": "Python"
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- ],
- "timestamp_created": "2024-01-12 09:40:03.972345+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/147172",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
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- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "id": 1176,
- "name": "Neuronvisio: a gui with 3D capabilities for NEURON (Mattioni et al. 2012)",
- "repository_type": "github",
- "summary": "\"The NEURON simulation environment is a commonly used tool to perform electrical simulation of neurons and neuronal networks. \r\n\r\nThe NEURON User Interface, based on the now discontinued InterViews library, provides some limited facilities to explore models and to plot their simulation results. \r\n\r\nOther limitations include the inability to generate a three-dimensional visualization, no standard mean to save the results of simulations, or to store the model geometry within the results. \r\n\r\nNeuronvisio (http://neuronvisio.org) aims to address these deficiencies through a set of well designed python APIs and provides an improved UI, allowing users to explore and interact with the model. \r\n...\"",
- "tags": [
- {
- "id": 756,
- "tag": "Methods"
- },
- {
- "id": 564,
- "tag": "ModelDB"
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- "id": 1705,
- "tag": "ModelDB:147185"
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- "id": 848,
- "tag": "NeuroML (web link to model)"
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- "id": 1706,
- "tag": "Neuronvisio (web link to model)"
- }
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- "timestamp_created": "2024-01-12 09:40:04.481207+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/147185",
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- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
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- "name": "Dendritic signals command firing dynamics in a Cerebellar Purkinje Cell model (Genet et al. 2010)",
- "repository_type": "github",
- "summary": "This model endows the dendrites of a reconstructed Purkinje cells (PC) with the mechanism of Ca-dependent plateau potentials and spikes described in Genet, S., and B. Delord. 2002. A biophysical model of nonlinear dynamics underlying plateau potentials and calcium spikes in Purkinje cell dendrites. J. Neurophysiol. 88:2430\u20132444). It is a part of a comprehensive mathematical study suggesting that active electric signals in the dendrites of PC command epochs of firing and silencing of the PC soma.",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 579,
- "tag": "Active Dendrites"
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- "id": 1684,
- "tag": "Ca pump"
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- "id": 572,
- "tag": "Calcium dynamics"
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- "id": 1606,
- "tag": "Conductance distributions"
- },
- {
- "id": 565,
- "tag": "Dendritic Action Potentials"
- },
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- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
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- "id": 1560,
- "tag": "I Ca,p"
- },
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- "id": 576,
- "tag": "I K"
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- {
- "id": 564,
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- "id": 1707,
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- "timestamp_created": "2024-01-12 09:40:05.022354+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/147218",
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- "name": "Composite spiking network/neural field model of Parkinsons (Kerr et al 2013)",
- "repository_type": "github",
- "summary": "This code implements a composite model of Parkinson's disease (PD). The\r\ncomposite model consists of a leaky integrate-and-fire spiking neuronal\r\nnetwork model being driven by output from a neural field model (instead\r\nof the more usual white noise drive). Three different sets of parameters\r\nwere used for the field model: one with basal ganglia parameters based\r\non data from healthy individuals, one based on data from individuals\r\nwith PD, and one purely thalamocortical model. The aim of this model is\r\nto explore how the different dynamical patterns in each each of these\r\nfield models affects the activity in the network model.",
- "tags": [
- {
- "id": 765,
- "tag": "I Chloride"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 582,
- "tag": "I Sodium"
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- "id": 1478,
- "tag": "Information transfer"
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- "tag": "Methods"
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- "id": 1708,
- "tag": "ModelDB:147366"
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- "id": 743,
- "tag": "NEURON (web link to model)"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 801,
- "tag": "Parkinson's"
- },
- {
- "id": 620,
- "tag": "Python"
- }
- ],
- "timestamp_created": "2024-01-12 09:40:05.582446+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/147366",
- "user": {
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- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "modeling"
- ],
- "default_context": "master",
- "id": 1179,
- "name": "IP3R model comparison (Hituri and Linne 2013)",
- "repository_type": "github",
- "summary": "In this study, four models of IP3R (Othmer and Tang, 1993; Dawson et al., 2003; Fraiman and Dawson, 2004; Doi et al., 2005) were selected among many to examine their behavior and compare them with experimental data available in literature.\r\n\r\nThe provided MATLAB script (run_IP3R_P0.m) will run the simulations and plot Figure 2A in \r\nthe paper.\r\n",
- "tags": [
- {
- "id": 790,
- "tag": "Calcium waves"
- },
- {
- "id": 567,
- "tag": "Ion Channel Kinetics"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1709,
- "tag": "ModelDB:147367"
- },
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- "id": 1574,
- "tag": "STEPS"
- }
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- "timestamp_created": "2024-01-12 09:40:06.157354+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/147367",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "content_types": "modeling",
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- "modeling"
- ],
- "default_context": "master",
- "id": 1180,
- "name": "Direct recruitment of S1 pyramidal cells and interneurons via ICMS (Overstreet et al., 2013)",
- "repository_type": "github",
- "summary": "Study of the pyramidal cells and interneurons recruited by intracortical microstimulation in primary somatosensory cortex. Code includes morphological models for seven types of pyramidal cells and eight types of interneurons, NEURON code to simulate ICMS, and an artificial reconstruction of a 3D slab of cortex implemented in MATLAB.",
- "tags": [
- {
- "id": 739,
- "tag": "I Na,p"
- },
- {
- "id": 783,
- "tag": "I_Ks"
- },
- {
- "id": 1710,
- "tag": "Intracortical Microstimulation"
- },
- {
- "id": 655,
- "tag": "MATLAB"
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- "id": 564,
- "tag": "ModelDB"
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- "id": 1711,
- "tag": "ModelDB:147460"
- },
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- "id": 577,
- "tag": "NEURON"
- }
- ],
- "timestamp_created": "2024-01-12 09:40:06.681448+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/147460",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1181": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1181,
- "name": "Storing serial order in intrinsic excitability: a working memory model (Conde-Sousa & Aguiar 2013)",
- "repository_type": "github",
- "summary": "\" \u2026 Here we present a model for working\r\nmemory which relies on the modulation of the intrinsic excitability properties of neurons, instead of synaptic plasticity, to retain novel information for periods of seconds to minutes. \r\n\r\nWe show that it is possible to effectively use this mechanism to store the serial order in a sequence of patterns of activity.\r\n\u2026\r\nThe presented model exhibits properties which\r\nare in close agreement with experimental results in working\r\nmemory. ...\r\n\"\r\n",
- "tags": [
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1712,
- "tag": "ModelDB:147461"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 794,
- "tag": "Working memory"
- }
- ],
- "timestamp_created": "2024-01-12 09:40:07.182857+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/147461",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "auto_sync": true,
- "content_types": "modeling",
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- "modeling"
- ],
- "default_context": "main",
- "id": 1182,
- "name": "A detailed and fast model of extracellular recordings (Camunas-Mesa & Qurioga 2013)",
- "repository_type": "github",
- "summary": "\"We present a novel method to generate realistic simulations of extracellular recordings. The simulations were obtained by superimposing the activity of neurons placed randomly in a cube of brain tissue. Detailed models of individual neurons were used to reproduce the extracellular action potentials of close-by neurons. ...\"",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 734,
- "tag": "Extracellular Fields"
- },
- {
- "id": 767,
- "tag": "MATLAB (web link to model)"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1713,
- "tag": "ModelDB:147487"
- }
- ],
- "timestamp_created": "2024-01-12 09:40:07.707957+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/147487",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1183": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1183,
- "name": "Altered complexity in layer 2/3 pyramidal neurons (Luuk van der Velden et al. 2012)",
- "repository_type": "github",
- "summary": "\" ... Our experimental results show that hypercomplexity of the apical dendritic tuft of layer 2/3 pyramidal neurons affects neuronal excitability by reducing the amount of spike frequency adaptation. \r\n\r\nThis difference in firing pattern, related to a higher dendritic complexity, was accompanied by an altered development of the afterhyperpolarization slope with successive action potentials. \r\n\r\nOur abstract and realistic neuronal models, which allowed manipulation of the dendritic complexity, showed similar effects on neuronal excitability and confirmed the impact of apical dendritic complexity.\r\n\r\nAlterations of dendritic complexity, as observed in several pathological conditions such as neurodegenerative diseases or neurodevelopmental disorders, may thus not only affect the input to layer 2/3 pyramidal neurons but also shape their firing pattern and consequently alter the information processing in the cortex.\"",
- "tags": [
- {
- "id": 1684,
- "tag": "Ca pump"
- },
- {
- "id": 570,
- "tag": "Influence of Dendritic Geometry"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1714,
- "tag": "ModelDB:147514"
- },
- {
- "id": 577,
- "tag": "NEURON"
- }
- ],
- "timestamp_created": "2024-01-12 09:40:08.205586+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/147514",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1184": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1184,
- "name": "BCM-like synaptic plasticity with conductance-based models (Narayanan Johnston, 2010)",
- "repository_type": "github",
- "summary": "\" ...\r\nAlthough the BCM-like plasticity framework\r\nhas been a useful formulation to understand synaptic plasticity\r\nand metaplasticity, a mechanism for the activity-dependent regulation\r\nof this modification threshold has remained an open question. In this\r\nsimulation study based on CA1 pyramidal cells, we use a modification\r\nof the calcium-dependent hypothesis proposed elsewhere and show\r\nthat a change in the hyperpolarization-activated, nonspecific-cation h\r\ncurrent is capable of shifting the modification threshold. \r\n...\"",
- "tags": [
- {
- "id": 579,
- "tag": "Active Dendrites"
- },
- {
- "id": 572,
- "tag": "Calcium dynamics"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1715,
- "tag": "ModelDB:147538"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 725,
- "tag": "Synaptic Plasticity"
- }
- ],
- "timestamp_created": "2024-01-12 09:40:08.776645+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/147538",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1185": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1185,
- "name": "Resonance properties through Chirp stimulus responses (Narayanan Johnston 2007, 2008)",
- "repository_type": "github",
- "summary": "...we constructed a simple, single-compartment\r\nmodel with Ih as the only active current... we found that both resonance frequency and resonance strength increased monotonically with the increase in the h conductance, supporting the notion of a direct, graded relationship between h conductance and resonance properties... (Narayanan and Johnston, 2007). ...we show that the h channels introduce an apparent negative delay in the local voltage response of these neurons with respect to the injected current within the theta frequency range... we found that the total inductive phase increased monotonically with the h conductance, whereas it had a bell-shaped dependence on both the membrane voltage and the half-maximal activation voltage for the h conductance. (Narayanan and Johnston, 2008).",
- "tags": [
- {
- "id": 1606,
- "tag": "Conductance distributions"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 567,
- "tag": "Ion Channel Kinetics"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1716,
- "tag": "ModelDB:147539"
- },
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- "id": 577,
- "tag": "NEURON"
- }
- ],
- "timestamp_created": "2024-01-12 09:40:09.336859+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/147539",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1186,
- "name": "Chirp stimulus responses in a morphologically realistic model (Narayanan and Johnston, 2007)",
- "repository_type": "github",
- "summary": "...we built a multicompartmental model with a morphologically realistic three-dimensional reconstruction of a CA1 pyramidal neuron. The only active conductance we added to the model was the h conductance. ... We conclude that experimentally observed gradient in density of h channels could theoretically account for experimentally observed gradient in resonance properties (Narayanan and Johnston, 2007).",
- "tags": [
- {
- "id": 579,
- "tag": "Active Dendrites"
- },
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 594,
- "tag": "I h"
- },
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- "id": 567,
- "tag": "Ion Channel Kinetics"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1717,
- "tag": "ModelDB:147578"
- },
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- "id": 577,
- "tag": "NEURON"
- }
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- "timestamp_created": "2024-01-12 09:40:09.871213+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/147578",
- "user": {
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- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 1187,
- "name": "Cytoplasmic electric fields and electroosmosis (Andreev 2013)",
- "repository_type": "github",
- "summary": "The paper presents two mathematical models describing the role of electroosmosis in the transport of the negatively charged messenger proteins to the negatively charged nucleus and in the recovery of the fluorescence after photobleaching. The parameters of the models were derived from the extensive review of the literature data. Computer simulations were performed within the COMSOL 4.2a software environment. The first model demonstrated that the presence of electroosmosis might intensify the flux of messenger proteins to the nucleus and allow the efficient transport of the negatively charged phosphorylated messenger proteins against the electrostatic repulsion of the negatively charged nucleus. The second model revealed that the presence of the electroosmotic flow made the time of fluorescence recovery dependent on the position of the bleaching spot relative to cellular membrane.",
- "tags": [
- {
- "id": 1718,
- "tag": "COMSOL (web link to model)"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1719,
- "tag": "ModelDB:147740"
- }
- ],
- "timestamp_created": "2024-01-12 09:40:10.370564+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/147740",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
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- "default_context": "master",
- "id": 1188,
- "name": "Human sleep/wake cycle (Rempe et al. 2010)",
- "repository_type": "github",
- "summary": "This model simulates sleep in the human brain and is consistent with both the flip/flop concept and the two-process model of sleep regulation. The model also gives a possible mechanism for the changes in sleep timing seen in narcolepsy.",
- "tags": [
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1720,
- "tag": "ModelDB:147748"
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- "id": 592,
- "tag": "Sleep"
- },
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- "id": 759,
- "tag": "XPPAUT"
- }
- ],
- "timestamp_created": "2024-01-12 09:40:10.858170+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/147748",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "modeling"
- ],
- "default_context": "master",
- "id": 1189,
- "name": "Region-specific atrophy in dendrites (Narayanan, Narayan, Chattarji, 2005)",
- "repository_type": "github",
- "summary": "...in this study, we develop an algorithm that uses statistics from precise morphometric analyses to systematically remodel neuronal reconstructions. We use the distribution function of the ratio of two normal distributed random variables to specify the probabilities of remodeling along various regions of the dendritic arborization. We then use these probabilities to drive an iterative algorithm for manipulating the dendritic tree in a region-specific manner. As a test, we apply this framework to a well characterized example of dendritic remodeling: stress-induced dendritic atrophy in hippocampal CA3 pyramidal cells. We show that our pruning algorithm is capable of eliciting atrophy that matches biological data from rodent models of chronic stress.\r\n ",
- "tags": [
- {
- "id": 755,
- "tag": "C or Cplusplus program"
- },
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- "id": 570,
- "tag": "Influence of Dendritic Geometry"
- },
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- "id": 564,
- "tag": "ModelDB"
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- "id": 1721,
- "tag": "ModelDB:147756"
- }
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- "timestamp_created": "2024-01-12 09:40:11.352433+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/147756",
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- "email": "info@opensourcebrain.org",
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- "modeling"
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- "default_context": "master",
- "id": 1190,
- "name": "Amyloid-beta effects on release probability and integration at CA3-CA1 synapses (Romani et al. 2013)",
- "repository_type": "github",
- "summary": "The role of amyloid beta (A\u00df) in brain function and in the pathogenesis of Alzheimer\u2019s disease remains elusive.\r\nRecent publications reported that an increase in A\u00df concentration perturbs presynaptic release in hippocampal neurons, in particular by increasing release probability of CA3-CA1 synapses. The model predics how this alteration can affect synaptic plasticity and signal integration. The results suggest that the perturbation of release probability induced by increased A\u00df can significantly alter the spike probability of CA1 pyramidal neurons and thus contribute to abnormal hippocampal function during Alzheimer\u2019s disease.",
- "tags": [
- {
- "id": 827,
- "tag": "Aging/Alzheimer`s"
- },
- {
- "id": 722,
- "tag": "Depression"
- },
- {
- "id": 723,
- "tag": "Facilitation"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 580,
- "tag": "I M"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 1433,
- "tag": "I_AHP"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1722,
- "tag": "ModelDB:147757"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 724,
- "tag": "Short-term Synaptic Plasticity"
- },
- {
- "id": 596,
- "tag": "Synaptic Integration"
- },
- {
- "id": 725,
- "tag": "Synaptic Plasticity"
- }
- ],
- "timestamp_created": "2024-01-12 09:40:11.876408+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/147757",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "modeling"
- ],
- "default_context": "master",
- "id": 1191,
- "name": "Impact of dendritic atrophy on intrinsic and synaptic excitability (Narayanan & Chattarji, 2010)",
- "repository_type": "github",
- "summary": "These simulations examined the atrophy induced changes in electrophysiological properties of CA3 pyramidal neurons. We found these neurons change from bursting to regular spiking as atrophy increases. Region-specific atrophy induced region-specific increases in synaptic excitability in a passive dendritic tree. All dendritic compartments of an atrophied \r\nneuron had greater synaptic excitability and a larger voltage transfer to the soma than the control neuron.\r\n",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 579,
- "tag": "Active Dendrites"
- },
- {
- "id": 1606,
- "tag": "Conductance distributions"
- },
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- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 589,
- "tag": "I L high threshold"
- },
- {
- "id": 580,
- "tag": "I M"
- },
- {
- "id": 721,
- "tag": "I N"
- },
- {
- "id": 574,
- "tag": "I Na,t"
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- "id": 575,
- "tag": "I T low threshold"
- },
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- "id": 594,
- "tag": "I h"
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- "id": 1433,
- "tag": "I_AHP"
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- "id": 570,
- "tag": "Influence of Dendritic Geometry"
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- "tag": "ModelDB"
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- "id": 1723,
- "tag": "ModelDB:147867"
- },
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- "id": 577,
- "tag": "NEURON"
- }
- ],
- "timestamp_created": "2024-01-12 09:40:12.496722+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/147867",
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- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
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- ],
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- "id": 1192,
- "name": "Development of orientation-selective simple cell receptive fields (Rishikesh and Venkatesh, 2003)",
- "repository_type": "github",
- "summary": "Implementation of a computational model for the development of\r\nsimple-cell receptive fields spanning the regimes before and after eye-opening. The before eye-opening period is governed by a correlation-based rule from Miller (Miller, J. Neurosci., 1994), and the post eye-opening period is governed by a self-organizing, experience-dependent dynamics derived in the reference below.",
- "tags": [
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- "id": 755,
- "tag": "C or Cplusplus program"
- },
- {
- "id": 793,
- "tag": "Development"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1724,
- "tag": "ModelDB:147929"
- },
- {
- "id": 1569,
- "tag": "Orientation selectivity"
- },
- {
- "id": 791,
- "tag": "Rate-coding model neurons"
- },
- {
- "id": 803,
- "tag": "Unsupervised Learning"
- },
- {
- "id": 726,
- "tag": "Vision"
- },
- {
- "id": 822,
- "tag": "Winner-take-all"
- }
- ],
- "timestamp_created": "2024-01-12 09:40:13.211196+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/147929",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1193": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 1193,
- "name": "Towards a virtual C. elegans (Palyanov et al. 2012)",
- "repository_type": "github",
- "summary": "\"... Here we present a detailed demonstration of a virtual C. elegans\r\naimed at integrating these data in the form of a 3D dynamic model operating in a simulated physical environment. Our current\r\ndemonstration includes a realistic flexible worm body model, muscular system and a partially implemented ventral neural cord.\r\nOur virtual C. elegans demonstrates successful forward and backward locomotion when sending sinusoidal patterns of neuronal\r\nactivity to groups of motor neurons. \r\n...\"",
- "tags": [
- {
- "id": 776,
- "tag": "C or Cplusplus program (web link to model)"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1725,
- "tag": "ModelDB:147938"
- },
- {
- "id": 587,
- "tag": "Spatio-temporal Activity Patterns"
- }
- ],
- "timestamp_created": "2024-01-12 09:40:13.726219+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/147938",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "1194": {
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- "content_types": "modeling",
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- "modeling"
- ],
- "default_context": "master",
- "id": 1194,
- "name": "Spiking GridPlaceMap model (Pilly & Grossberg, PLoS One, 2013)",
- "repository_type": "github",
- "summary": "Development of spiking grid cells and place cells in the entorhinal-hippocampal system to represent positions in large spaces",
- "tags": [
- {
- "id": 727,
- "tag": "Action Potential Initiation"
- },
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 1527,
- "tag": "Brain Rhythms"
- },
- {
- "id": 855,
- "tag": "Connectivity matrix"
- },
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 793,
- "tag": "Development"
- },
- {
- "id": 1461,
- "tag": "Grid cell"
- },
- {
- "id": 1531,
- "tag": "I Cl, leak"
- },
- {
- "id": 567,
- "tag": "Ion Channel Kinetics"
- },
- {
- "id": 825,
- "tag": "Learning"
- },
- {
- "id": 749,
- "tag": "Long-term Synaptic Plasticity"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1726,
- "tag": "ModelDB:148035"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 719,
- "tag": "Pattern Recognition"
- },
- {
- "id": 799,
- "tag": "Place cell/field"
- },
- {
- "id": 596,
- "tag": "Synaptic Integration"
- },
- {
- "id": 725,
- "tag": "Synaptic Plasticity"
- },
- {
- "id": 803,
- "tag": "Unsupervised Learning"
- }
- ],
- "timestamp_created": "2024-01-12 09:40:14.249238+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/148035",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1195": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1195,
- "name": "CA1 pyramidal neuron: effects of R213Q and R312W Kv7.2 mutations (Miceli et al. 2013)",
- "repository_type": "github",
- "summary": "NEURON mod files from the paper:\r\n\r\nMiceli et al, Genotype\u2013phenotype correlations in neonatal epilepsies caused by mutations in the voltage sensor of Kv7.2 potassium channel subunits, PNAS 2013 Feb 25. [Epub ahead of print]\r\n\r\nIn this paper, functional studies revealed that in homomeric or heteromeric configuration with KV7.2 and/or KV7.3 subunits, R213W and \r\nR213Q mutations markedly destabilized the open state, causing a dramatic decrease in channel voltage sensitivity.\r\nModeling these channels in CA1 hippocampal pyramidal cells revealed that both mutations increased cell firing frequency,\r\nwith the R213Q mutation prompting more dramatic functional changes compared with the R213W mutation.",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 579,
- "tag": "Active Dendrites"
- },
- {
- "id": 469,
- "tag": "Epilepsy"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 580,
- "tag": "I M"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1727,
- "tag": "ModelDB:148094"
- },
- {
- "id": 577,
- "tag": "NEURON"
- }
- ],
- "timestamp_created": "2024-01-12 09:40:14.782545+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/148094",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "auto_sync": true,
- "content_types": "modeling",
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- ],
- "default_context": "master",
- "id": 1196,
- "name": "Effects of Chloride accumulation and diffusion on GABAergic transmission (Jedlicka et al 2011)",
- "repository_type": "github",
- "summary": "\"In the CNS, prolonged activation of GABA(A) receptors (GABA(A)Rs) has been shown to evoke biphasic postsynaptic responses, consisting of an initial hyperpolarization followed by a depolarization. \r\n\r\nA potential mechanism underlying the depolarization is an acute chloride (Cl(-)) accumulation resulting in a shift of the GABA(A) reversal potential (E(GABA)).\r\n\r\nThe amount of GABA-evoked Cl(-) accumulation and accompanying depolarization depends on presynaptic and postsynaptic properties of GABAergic transmission, as well as on cellular morphology and regulation of Cl(-) intracellular concentration ([Cl(-)](i)).\r\n\r\nTo analyze the influence of these factors on the Cl(-) and voltage behavior, we studied spatiotemporal dynamics of activity-dependent [Cl(-)](i) changes in multicompartmental models of hippocampal cells based on realistic morphological data.\r\n...\"",
- "tags": [
- {
- "id": 1592,
- "tag": "Chloride regulation"
- },
- {
- "id": 765,
- "tag": "I Chloride"
- },
- {
- "id": 1728,
- "tag": "I_HCO3"
- },
- {
- "id": 570,
- "tag": "Influence of Dendritic Geometry"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1729,
- "tag": "ModelDB:148253"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 724,
- "tag": "Short-term Synaptic Plasticity"
- }
- ],
- "timestamp_created": "2024-01-12 09:40:15.296907+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/148253",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1197": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1197,
- "name": "Circadian clock model in mammals (PK/PD model) (Kim & Forger 2013)",
- "repository_type": "github",
- "summary": "A systems pharmacology model of the mammalian circadian clock including PF-670462 (CK1d/e inhibitor).",
- "tags": [
- {
- "id": 1586,
- "tag": "Circadian Rhythms"
- },
- {
- "id": 1609,
- "tag": "Mathematica"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1730,
- "tag": "ModelDB:148320"
- },
- {
- "id": 823,
- "tag": "Phase Response Curves"
- },
- {
- "id": 746,
- "tag": "Therapeutics"
- }
- ],
- "timestamp_created": "2024-01-12 09:40:15.851492+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/148320",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1198": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1198,
- "name": "Failure of Deep Brain Stimulation in a basal ganglia neuronal network model (Dovzhenok et al. 2013)",
- "repository_type": "github",
- "summary": "\"\u2026 Recently, a lot of interest has been devoted to desynchronizing delayed feedback deep brain stimulation (DBS).\r\n...\r\nThis study explores the action of delayed feedback stimulation on partially synchronized oscillatory dynamics, similar to what one observes experimentally in parkinsonian patients.\r\n\u2026\"\r\n\r\nImplemented by Andrey Dovzhenok, to whom questions should be addressed.",
- "tags": [
- {
- "id": 831,
- "tag": "Deep brain stimulation"
- },
- {
- "id": 1560,
- "tag": "I Ca,p"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 575,
- "tag": "I T low threshold"
- },
- {
- "id": 1433,
- "tag": "I_AHP"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1731,
- "tag": "ModelDB:148637"
- },
- {
- "id": 801,
- "tag": "Parkinson's"
- },
- {
- "id": 586,
- "tag": "Synchronization"
- },
- {
- "id": 759,
- "tag": "XPPAUT"
- }
- ],
- "timestamp_created": "2024-01-12 09:40:16.437572+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/148637",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1199": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1199,
- "name": "Neuronal morphology goes digital ... (Parekh & Ascoli 2013)",
- "repository_type": "github",
- "summary": "An illustration of a NEURON model and why reconstructing morphologies\r\nis useful in this regard (i.e. investigating spatial/temporal aspect\r\nof how different currents and voltage propagate in dendrites).",
- "tags": [
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 594,
- "tag": "I h"
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- {
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- "timestamp_created": "2024-01-12 09:40:16.951734+00:00",
- "timestamp_updated": "---",
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- "id": 1200,
- "name": "CA1 pyramidal neuron: action potential backpropagation (Gasparini & Migliore 2015)",
- "repository_type": "github",
- "summary": "\" ... the investigation of AP backpropagation and its functional roles has greatly benefitted from computational models that use biophysically and morphologically accurate implementations. ...\" This model entry recreates figures 2 and 4 from the paper illustrating how conductance densities of voltage gated channels (fig 2) and the timing of synaptic input with backpropagating action potentials (fig 4) affects membrane voltage trajectories.",
- "tags": [
- {
- "id": 727,
- "tag": "Action Potential Initiation"
- },
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- "id": 736,
- "tag": "Action Potentials"
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- "id": 579,
- "tag": "Active Dendrites"
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- "id": 576,
- "tag": "I K"
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- "id": 574,
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- "id": 564,
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- "tag": "ModelDB:148646"
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- "id": 577,
- "tag": "NEURON"
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- "id": 596,
- "tag": "Synaptic Integration"
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- "timestamp_created": "2024-01-12 09:40:17.465580+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/148646",
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- "modeling"
- ],
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- "id": 1201,
- "name": "Using Strahler's analysis to reduce realistic models (Marasco et al, 2013)",
- "repository_type": "github",
- "summary": "Building on our previous work (Marasco et al., (2012)), we present a general reduction method based on Strahler's analysis of neuron\r\nmorphologies. We show that, without any fitting or tuning procedures, it is\r\npossible to map any morphologically and biophysically accurate neuron model\r\ninto an equivalent reduced version. Using this method for Purkinje cells, we\r\ndemonstrate how run times can be reduced up to 200-fold, while accurately taking into account the effects of arbitrarily located and activated\r\nsynaptic inputs.\r\n",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 579,
- "tag": "Active Dendrites"
- },
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 1684,
- "tag": "Ca pump"
- },
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 575,
- "tag": "I T low threshold"
- },
- {
- "id": 570,
- "tag": "Influence of Dendritic Geometry"
- },
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- "id": 564,
- "tag": "ModelDB"
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- "id": 1734,
- "tag": "ModelDB:149000"
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- "id": 577,
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- "id": 596,
- "tag": "Synaptic Integration"
- }
- ],
- "timestamp_created": "2024-01-12 09:40:18.066823+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/149000",
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- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
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- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "modeling"
- ],
- "default_context": "master",
- "id": 1202,
- "name": "Preserving axosomatic spiking features despite diverse dendritic morphology (Hay et al., 2013)",
- "repository_type": "github",
- "summary": "The authors found that linearly scaling the ion channel conductance densities of a reference model with the conductance load in 28 3D reconstructed layer 5 thick-tufted pyramidal cells was necessary to match the experimental statistics of these cells electrical firing properties.",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 730,
- "tag": "I A, slow"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 589,
- "tag": "I L high threshold"
- },
- {
- "id": 739,
- "tag": "I Na,p"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 575,
- "tag": "I T low threshold"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1735,
- "tag": "ModelDB:149100"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 568,
- "tag": "Parameter Fitting"
- },
- {
- "id": 863,
- "tag": "Parameter sensitivity"
- }
- ],
- "timestamp_created": "2024-01-12 09:40:18.718769+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/149100",
- "user": {
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- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
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- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "auto_sync": true,
- "content_types": "modeling",
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- "modeling"
- ],
- "default_context": "master",
- "id": 1203,
- "name": "Rescue of plasticity by a computationally predicted protocol (Liu et al. 2013)",
- "repository_type": "github",
- "summary": "\" ... A computational model,\r\nwhich simulated molecular processes underlying long-term\r\nsynaptic facilitation (LTF) induction, predicted a rescue protocol of five pulses of 5-HT at non-uniform interstimulus\r\nintervals that overcame the consequences of reduced CREB-binding protein (CBP) and restored LTF. ...\"",
- "tags": [
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1736,
- "tag": "ModelDB:149162"
- },
- {
- "id": 751,
- "tag": "Signaling pathways"
- },
- {
- "id": 759,
- "tag": "XPPAUT"
- }
- ],
- "timestamp_created": "2024-01-12 09:40:19.592910+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/149162",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "auto_sync": true,
- "content_types": "modeling",
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- "modeling"
- ],
- "default_context": "master",
- "id": 1204,
- "name": "State dependent drug binding to sodium channels in the dentate gyrus (Thomas & Petrou 2013)",
- "repository_type": "github",
- "summary": "A Markov model of sodium channels was developed that includes drug binding to fast inactivated states. This was incorporated into a model of the dentate gyrus to investigate the effects of anti-epileptic drugs on neuron and network properties.",
- "tags": [
- {
- "id": 572,
- "tag": "Calcium dynamics"
- },
- {
- "id": 1737,
- "tag": "Drug binding"
- },
- {
- "id": 469,
- "tag": "Epilepsy"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 1433,
- "tag": "I_AHP"
- },
- {
- "id": 567,
- "tag": "Ion Channel Kinetics"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 748,
- "tag": "Markov-type model"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1738,
- "tag": "ModelDB:149174"
- },
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- "id": 577,
- "tag": "NEURON"
- }
- ],
- "timestamp_created": "2024-01-12 09:40:20.122932+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/149174",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
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- "auto_sync": true,
- "content_types": "modeling",
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- "modeling"
- ],
- "default_context": "master",
- "id": 1205,
- "name": "Roles of essential kinases in induction of late hippocampal LTP (Smolen et al., 2006)",
- "repository_type": "github",
- "summary": "\"\u2026 Convergence of multiple kinase activities to induce L-LTP helps to generate a threshold whereby the amount of L-LTP varies steeply with the number of brief (tetanic) electrical stimuli. The model simulates tetanic, -burst, pairing-induced, and chemical L-LTP, as well as L-LTP due to synaptic tagging. The model also simulates inhibition of L-LTP by inhibition of MAPK, CAMKII, PKA, or CAMKIV. The model predicts results of experiments to delineate mechanisms underlying L-LTP induction and expression.\r\n\u2026\"\r\n",
- "tags": [
- {
- "id": 1739,
- "tag": "CREB"
- },
- {
- "id": 778,
- "tag": "Java"
- },
- {
- "id": 749,
- "tag": "Long-term Synaptic Plasticity"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1740,
- "tag": "ModelDB:149175"
- },
- {
- "id": 751,
- "tag": "Signaling pathways"
- },
- {
- "id": 725,
- "tag": "Synaptic Plasticity"
- }
- ],
- "timestamp_created": "2024-01-12 09:40:20.645227+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/149175",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "auto_sync": true,
- "content_types": "modeling",
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- "modeling"
- ],
- "default_context": "master",
- "id": 1206,
- "name": "Olfactory Computations in Mitral-Granule cell circuits (Migliore & McTavish 2013)",
- "repository_type": "github",
- "summary": "Model files for the entry \"Olfactory Computations in Mitral-Granule Cell Circuits\" of the Springer Encyclopedia of Computational Neuroscience by Michele Migliore and Tom Mctavish.\r\n\r\nThe simulations illustrate two typical Mitral-Granule cell circuits in the olfactory bulb of vertebrates: distance-independent lateral inhibition and gating effects.\r\n",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 579,
- "tag": "Active Dendrites"
- },
- {
- "id": 565,
- "tag": "Dendritic Action Potentials"
- },
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 763,
- "tag": "Intrinsic plasticity"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1741,
- "tag": "ModelDB:149415"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 588,
- "tag": "Olfaction"
- }
- ],
- "timestamp_created": "2024-01-12 09:40:21.153779+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/149415",
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- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
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- "default_context": "main",
- "id": 1207,
- "name": "Modeling conductivity profiles in the deep neocortical pyramidal neuron (Wang K et al. 2013)",
- "repository_type": "github",
- "summary": "\"With the rapid increase in the number of technologies aimed at observing\r\nelectric activity inside the brain, scientists have felt the urge to create\r\nproper links between intracellular- and extracellular-based experimental\r\napproaches. Biophysical models at both physical scales have been formalized\r\nunder assumptions that impede the creation of such links. In this\r\nwork, we address this issue by proposing amulticompartment model that\r\nallows the introduction of complex extracellular and intracellular resistivity\r\nprofiles. This model accounts for the geometrical and electrotonic\r\nproperties of any type of neuron through the combination of four devices:\r\nthe integrator, the propagator, the 3D connector, and the collector. ...\"",
- "tags": [
- {
- "id": 1606,
- "tag": "Conductance distributions"
- },
- {
- "id": 565,
- "tag": "Dendritic Action Potentials"
- },
- {
- "id": 1546,
- "tag": "Evoked LFP"
- },
- {
- "id": 734,
- "tag": "Extracellular Fields"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
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- "id": 594,
- "tag": "I h"
- },
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- "id": 783,
- "tag": "I_Ks"
- },
- {
- "id": 570,
- "tag": "Influence of Dendritic Geometry"
- },
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- "id": 767,
- "tag": "MATLAB (web link to model)"
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- "id": 564,
- "tag": "ModelDB"
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- "id": 1742,
- "tag": "ModelDB:149737"
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- "id": 743,
- "tag": "NEURON (web link to model)"
- }
- ],
- "timestamp_created": "2024-01-12 09:40:21.807111+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/149737",
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- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "auto_sync": true,
- "content_types": "modeling",
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- "default_context": "master",
- "id": 1208,
- "name": "A two-layer biophysical olfactory bulb model of cholinergic neuromodulation (Li and Cleland 2013)",
- "repository_type": "github",
- "summary": "This is a two-layer biophysical olfactory bulb (OB) network model to study cholinergic neuromodulation. Simulations show that nicotinic receptor activation sharpens mitral cell receptive field, while muscarinic receptor activation enhances network synchrony and gamma oscillations. This general model suggests that the roles of nicotinic and muscarinic receptors in OB are both distinct and complementary to one another, together regulating the effects of ascending cholinergic inputs on olfactory bulb transformations.",
- "tags": [
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 731,
- "tag": "I CAN"
- },
- {
- "id": 1560,
- "tag": "I Ca,p"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 1531,
- "tag": "I Cl, leak"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 589,
- "tag": "I L high threshold"
- },
- {
- "id": 580,
- "tag": "I M"
- },
- {
- "id": 739,
- "tag": "I Na,p"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 575,
- "tag": "I T low threshold"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 783,
- "tag": "I_Ks"
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- "id": 655,
- "tag": "MATLAB"
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- "tag": "ModelDB"
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- "id": 1743,
- "tag": "ModelDB:149739"
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- {
- "id": 577,
- "tag": "NEURON"
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- "id": 1744,
- "tag": "Neuromodulation"
- },
- {
- "id": 588,
- "tag": "Olfaction"
- },
- {
- "id": 821,
- "tag": "Sensory coding"
- },
- {
- "id": 758,
- "tag": "Sensory processing"
- }
- ],
- "timestamp_created": "2024-01-12 09:40:22.342327+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/149739",
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- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1209,
- "name": "Competing oscillator 5-cell circuit and Parameterscape plotting (Gutierrez et al. 2013)",
- "repository_type": "github",
- "summary": "Our 5-cell model consists of competing fast and slow oscillators connected to a hub neuron with electrical and inhibitory synapses. Motivated by the Stomatogastric Ganglion (STG) circuit in the crab, we explored the patterns of coordination in the network as a function of the electrical coupling and inhibitory synapse strengths with the help of a novel visualization method that we call the \"Parameterscape.\" The code submitted here will allow you to run circuit simulations and to produce a Parameterscape with the results.",
- "tags": [
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 594,
- "tag": "I h"
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- "id": 564,
- "tag": "ModelDB"
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- "id": 1745,
- "tag": "ModelDB:149910"
- },
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- "id": 569,
- "tag": "Simplified Models"
- }
- ],
- "timestamp_created": "2024-01-12 09:40:22.877845+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/149910",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "auto_sync": true,
- "content_types": "modeling",
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- "modeling"
- ],
- "default_context": "master",
- "id": 1210,
- "name": "Distributed synaptic plasticity and spike timing (Garrido et al. 2013)",
- "repository_type": "github",
- "summary": "Here we have used a computational model to simulate the impact of multiple distributed synaptic weights in the cerebellar granular layer network. In response to mossy fiber bursts, synaptic weights at multiple connections played a crucial role to regulate spike number and positioning in granule cells. Interestingly, different combinations of synaptic weights optimized either first-spike timing precision or spike number, efficiently controlling transmission and filtering properties. These results predict that distributed synaptic plasticity regulates the emission of quasi-digital spike patterns on the millisecond time scale and allows the cerebellar granular layer to flexibly control burst transmission along the mossy fiber pathway.",
- "tags": [
- {
- "id": 1746,
- "tag": "EDLUT"
- },
- {
- "id": 749,
- "tag": "Long-term Synaptic Plasticity"
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- "tag": "MATLAB"
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- {
- "id": 1747,
- "tag": "ModelDB:149913"
- }
- ],
- "timestamp_created": "2024-01-12 09:40:23.471335+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/149913",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1211": {
- "auto_sync": true,
- "content_types": "modeling",
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- "modeling"
- ],
- "default_context": "master",
- "id": 1211,
- "name": "Prob. Inference of Short-Term Synaptic Plasticity in Neocort. Microcircuits (Costa et al. 2013)",
- "repository_type": "github",
- "summary": "\" ... As a solution (for Short Term Plasticity (STP) inference), we introduce a Bayesian formulation, which yields the posterior distribution over the model parameters given the data. First, we show that common STP protocols yield broad distributions over some model parameters. Using our result we propose a experimental protocol to more accurately determine synaptic dynamics parameters. Next, we infer the model parameters using experimental data from three different neocortical excitatory connection types. This reveals connection-specific distributions, which we use to classify synaptic dynamics. Our approach to demarcate connection-specific synaptic dynamics is an important improvement on the state of the art and reveals novel features from existing data.\"",
- "tags": [
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1748,
- "tag": "ModelDB:149914"
- },
- {
- "id": 724,
- "tag": "Short-term Synaptic Plasticity"
- }
- ],
- "timestamp_created": "2024-01-12 09:40:23.978735+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/149914",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "content_types": "modeling",
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- "modeling"
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- "default_context": "master",
- "id": 1212,
- "name": "KV1 channel governs cerebellar output to thalamus (Ovsepian et al. 2013)",
- "repository_type": "github",
- "summary": "The output of the cerebellum to the motor axis of the central nervous system is\r\norchestrated mainly by synaptic inputs and intrinsic pacemaker activity of deep cerebellar nuclear\r\n(DCN) projection neurons. Herein, we demonstrate that the soma of these cells is enriched with\r\nKV1 channels produced by mandatory multi-merization of KV1.1, 1.2 alpha andKV beta2 subunits. Being\r\nconstitutively active, the K+ current (IKV1) mediated by these channels stabilizes the rate and\r\nregulates the temporal precision of self-sustained firing of these neurons. \r\n...\r\nThrough the use of multi-compartmental modelling and ... the physiological significance of the described functions for processing\r\nand communication of information from the lateral DCN to thalamic relay nuclei is established.",
- "tags": [
- {
- "id": 579,
- "tag": "Active Dendrites"
- },
- {
- "id": 566,
- "tag": "Bursting"
- },
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 731,
- "tag": "I CAN"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 589,
- "tag": "I L high threshold"
- },
- {
- "id": 739,
- "tag": "I Na,p"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 575,
- "tag": "I T low threshold"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 783,
- "tag": "I_Ks"
- },
- {
- "id": 763,
- "tag": "Intrinsic plasticity"
- },
- {
- "id": 567,
- "tag": "Ion Channel Kinetics"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1749,
- "tag": "ModelDB:150024"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 573,
- "tag": "Rebound firing"
- }
- ],
- "timestamp_created": "2024-01-12 09:40:24.593440+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/150024",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1213": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1213,
- "name": "An attractor network model of grid cells and theta-nested gamma oscillations (Pastoll et al 2013)",
- "repository_type": "github",
- "summary": "A two population spiking continuous attractor model of grid cells. This model combines the attractor dynamics with theta-nested gamma oscillatory activity. It reproduces the behavioural response of grid cells (grid fields) in medial entorhinal cortex, while at the same time allowing for nested gamma oscillations of post-synaptic currents.",
- "tags": [
- {
- "id": 718,
- "tag": "Attractor Neural Network"
- },
- {
- "id": 645,
- "tag": "Brian"
- },
- {
- "id": 1461,
- "tag": "Grid cell"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1750,
- "tag": "ModelDB:150031"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 620,
- "tag": "Python"
- }
- ],
- "timestamp_created": "2024-01-12 09:40:25.141673+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/150031",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1214": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1214,
- "name": "Distributed cerebellar plasticity implements adaptable gain control (Garrido et al., 2013)",
- "repository_type": "github",
- "summary": "We tested the role of plasticity distributed over multiple synaptic sites (Hansel et al., 2001; Gao et al., 2012) by generating an analog cerebellar model embedded into a control loop connected to a robotic simulator. The robot used a three-joint arm and performed repetitive fast manipulations with different masses along an 8-shape trajectory. In accordance with biological evidence, the cerebellum model was endowed with both LTD and LTP at the PF-PC, MF-DCN and PC-DCN synapses. This resulted in a network scheme whose effectiveness was extended considerably compared to one including just PF-PC synaptic plasticity. Indeed, the system including distributed plasticity reliably self-adapted to manipulate different masses and to learn the arm-object dynamics over a time course that included fast learning and consolidation, along the lines of what has been observed in behavioral tests. In particular, PF-PC plasticity operated as a time correlator between the actual input state and the system error, while MF-DCN and PC-DCN plasticity played a key role in generating the gain controller. This model suggests that distributed synaptic plasticity allows generation of the complex learning properties of the cerebellum.",
- "tags": [
- {
- "id": 755,
- "tag": "C or Cplusplus program"
- },
- {
- "id": 749,
- "tag": "Long-term Synaptic Plasticity"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1751,
- "tag": "ModelDB:150067"
- },
- {
- "id": 824,
- "tag": "Simulink"
- }
- ],
- "timestamp_created": "2024-01-12 09:40:25.675424+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/150067",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1215": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1215,
- "name": "Biologically Constrained Basal Ganglia model (BCBG model) (Lienard, Girard 2014)",
- "repository_type": "github",
- "summary": "We studied the physiology and function of the basal ganglia through the design of mean-field models of the whole basal ganglia. The parameterizations are optimized with multi-objective evolutionary algorithm to respect best a collection of numerous anatomical data and electrophysiological data. The main outcomes of our study are: \u2022 The strength of the GPe to GPi/SNr connection does not support opposed activities in the GPe and GPi/SNr. \u2022 STN and MSN target more the GPe than the GPi/SNr. \u2022 Selection arises from the structure of the basal ganglia, without properly segregated direct and indirect pathways and without specific inputs from pyramidal tract neurons of the cortex. Selection is enhanced when the projection from GPe to GPi/SNr has a diffuse pattern.",
- "tags": [
- {
- "id": 771,
- "tag": "Action Selection/Decision Making"
- },
- {
- "id": 755,
- "tag": "C or Cplusplus program"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1752,
- "tag": "ModelDB:150206"
- },
- {
- "id": 568,
- "tag": "Parameter Fitting"
- },
- {
- "id": 801,
- "tag": "Parkinson's"
- },
- {
- "id": 787,
- "tag": "Pathophysiology"
- },
- {
- "id": 822,
- "tag": "Winner-take-all"
- }
- ],
- "timestamp_created": "2024-01-12 09:40:26.267481+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/150206",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1216": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1216,
- "name": "A Method for Prediction of Receptor Activation in the Simulation of Synapses (Montes et al. 2013)",
- "repository_type": "github",
- "summary": "A machine-learning based method that can accurately predict relevant aspects of the behavior of synapses, such as the activation of synaptic receptors, at very low computational cost. The method is designed to learn patterns and general principles from previous Monte Carlo simulations and to predict synapse behavior from them. The resulting procedure is accurate, automatic and can predict synapse behavior under experimental conditions that are different to the ones used during the learning phase. Since our method efficiently reduces the computational costs, it is suitable for the simulation of the vast number of synapses that occur in the mammalian brain.",
- "tags": [
- {
- "id": 778,
- "tag": "Java"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1753,
- "tag": "ModelDB:150207"
- },
- {
- "id": 1754,
- "tag": "R"
- },
- {
- "id": 569,
- "tag": "Simplified Models"
- }
- ],
- "timestamp_created": "2024-01-12 09:40:26.763684+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/150207",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1217": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1217,
- "name": "Emergence of Connectivity Motifs in Networks of Model Neurons (Vasilaki, Giugliano 2014)",
- "repository_type": "github",
- "summary": "Recent evidence suggests that short-term dynamics of excitatory synaptic transmission is correlated to stereotypical connectivity motifs. \r\nWe show that these connectivity motifs emerge in networks of model neurons, from the interactions between short-term synaptic dynamics (SD) and long-term spike-timing dependent plasticity (STDP).",
- "tags": [
- {
- "id": 755,
- "tag": "C or Cplusplus program"
- },
- {
- "id": 855,
- "tag": "Connectivity matrix"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1755,
- "tag": "ModelDB:150211"
- },
- {
- "id": 588,
- "tag": "Olfaction"
- },
- {
- "id": 569,
- "tag": "Simplified Models"
- }
- ],
- "timestamp_created": "2024-01-12 09:40:27.256093+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/150211",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1218": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1218,
- "name": "Reliability of Morris-Lecar neurons with added T, h, and AHP currents (Zeldenrust et al. 2013)",
- "repository_type": "github",
- "summary": "We investigated the reliability of the timing of spikes in a spike train in a Morris-Lecar model with several extensions. A frozen Gaussian noise current, superimposed on a DC current, was injected. The neuron responded with spike trains that showed trial-to-trial variability. The reliability depends on the shape (steepness) of the current input versus spike frequency output curve. The model also allowed to study the contribution of three relevant ionic membrane currents to reliability: a T-type calcium current, a cation selective h-current and a calcium dependent potassium current in order to allow bursting, investigate the consequences of a more complex current-frequency relation and produce realistic firing rates.",
- "tags": [
- {
- "id": 566,
- "tag": "Bursting"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 575,
- "tag": "I T low threshold"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 1433,
- "tag": "I_AHP"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1756,
- "tag": "ModelDB:150217"
- },
- {
- "id": 862,
- "tag": "Reliability"
- },
- {
- "id": 759,
- "tag": "XPPAUT"
- }
- ],
- "timestamp_created": "2024-01-12 09:40:27.771609+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/150217",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1219": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1219,
- "name": "Fast convergence of cerebellar learning (Luque et al. 2015)",
- "repository_type": "github",
- "summary": "The cerebellum is known to play a critical role in learning relevant patterns of activity for adaptive motor control, but the underlying network mechanisms are only partly understood. The classical long-term synaptic plasticity between parallel fibers (PFs) and Purkinje cells (PCs), which is driven by the inferior olive (IO), can only account for limited aspects of learning. Recently, the role of additional forms of plasticity in the granular layer, molecular layer and deep cerebellar nuclei (DCN) has been considered. In particular, learning at DCN synapses allows for generalization, but convergence to a stable state requires hundreds of repetitions. In this paper we have explored the putative role of the IO-DCN connection by endowing it with adaptable weights and exploring its implications in a closed-loop robotic manipulation task. Our results show that IO-DCN plasticity accelerates convergence of learning by up to two orders of magnitude without conflicting with the generalization properties conferred by DCN plasticity. Thus, this model suggests that multiple distributed learning mechanisms provide a key for explaining the complex properties of procedural learning and open up new experimental questions for synaptic plasticity in the cerebellar network.",
- "tags": [
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1757,
- "tag": "ModelDB:150225"
- },
- {
- "id": 802,
- "tag": "STDP"
- },
- {
- "id": 824,
- "tag": "Simulink"
- }
- ],
- "timestamp_created": "2024-01-12 09:40:28.291262+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/150225",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1220": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1220,
- "name": "MEC layer II stellate cell: Synaptic mechanisms of grid cells (Schmidt-Hieber & Hausser 2013)",
- "repository_type": "github",
- "summary": "This study investigates the cellular mechanisms of grid field generation in Medial Entorhinal Cortex (MEC) layer II stellate cells.",
- "tags": [
- {
- "id": 718,
- "tag": "Attractor Neural Network"
- },
- {
- "id": 1461,
- "tag": "Grid cell"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 766,
- "tag": "I CNG"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1758,
- "tag": "ModelDB:150239"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 799,
- "tag": "Place cell/field"
- },
- {
- "id": 620,
- "tag": "Python"
- },
- {
- "id": 800,
- "tag": "Spatial Navigation"
- },
- {
- "id": 596,
- "tag": "Synaptic Integration"
- }
- ],
- "timestamp_created": "2024-01-12 09:40:28.857267+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/150239",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1221": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1221,
- "name": "A Model Circuit of Thalamocortical Convergence (Behuret et al. 2013)",
- "repository_type": "github",
- "summary": "\u201c\u2026\r\nUsing dynamic-clamp techniques in thalamic slices in vitro, we combined theoretical and experimental\r\napproaches to implement a realistic hybrid retino-thalamo-cortical pathway mixing biological cells and simulated circuits.\r\n\u2026\r\nThe study of\r\nthe impact of the simulated cortical input on the global retinocortical signal transfer efficiency revealed a novel control\r\nmechanism resulting from the collective resonance of all thalamic relay neurons. \r\nWe show here that the transfer efficiency\r\nof sensory input transmission depends on three key features: i) the number of thalamocortical cells involved in the many-to-one\r\nconvergence from thalamus to cortex, ii) the statistics of the corticothalamic synaptic bombardment and iii) the level of\r\ncorrelation imposed between converging thalamic relay cells. \r\nIn particular, our results demonstrate counterintuitively that\r\nthe retinocortical signal transfer efficiency increases when the level of correlation across thalamic cells decreases. \r\n\u2026\u201d\r\n",
- "tags": [
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 580,
- "tag": "I M"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 575,
- "tag": "I T low threshold"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1759,
- "tag": "ModelDB:150240"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 768,
- "tag": "Synaptic Convergence"
- }
- ],
- "timestamp_created": "2024-01-12 09:40:29.416582+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/150240",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1222": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1222,
- "name": "Sensorimotor cortex reinforcement learning of 2-joint virtual arm reaching (Neymotin et al. 2013)",
- "repository_type": "github",
- "summary": "\"...\r\nWe developed a model of sensory and motor neocortex consisting\r\nof 704 spiking model-neurons. Sensory and motor populations included excitatory cells\r\nand two types of interneurons. Neurons were interconnected with AMPA/NMDA, and\r\nGABAA synapses. We trained our model using spike-timing-dependent reinforcement\r\nlearning to control a 2-joint virtual arm to reach to a fixed target. \r\n...\r\n\"",
- "tags": [
- {
- "id": 825,
- "tag": "Learning"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1760,
- "tag": "ModelDB:150245"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 809,
- "tag": "Reinforcement Learning"
- },
- {
- "id": 859,
- "tag": "Reward-modulated STDP"
- },
- {
- "id": 802,
- "tag": "STDP"
- },
- {
- "id": 758,
- "tag": "Sensory processing"
- },
- {
- "id": 725,
- "tag": "Synaptic Plasticity"
- }
- ],
- "timestamp_created": "2024-01-12 09:40:29.948519+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/150245",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "1223": {
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- "modeling"
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- "default_context": "master",
- "id": 1223,
- "name": "Multiscale simulation of the striatal medium spiny neuron (Mattioni & Le Novere 2013)",
- "repository_type": "github",
- "summary": "\"\u2026 We present a new event-driven algorithm to synchronize different neuronal\r\nmodels, which decreases computational time and avoids superfluous synchronizations.\r\n\r\nThe algorithm is implemented in the TimeScales framework. \r\n\r\nWe demonstrate its use by simulating a new multiscale model of the Medium Spiny Neuron of the Neostriatum.\r\n\r\nThe model comprises over a thousand dendritic spines, where the electrical model interacts with the\r\nrespective instances of a biochemical model.\r\n\r\nOur results show that a multiscale model is able to exhibit changes of synaptic\r\nplasticity as a result of the interaction between electrical and biochemical signaling.\r\n\u2026\"",
- "tags": [
- {
- "id": 572,
- "tag": "Calcium dynamics"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 730,
- "tag": "I A, slow"
- },
- {
- "id": 731,
- "tag": "I CAN"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 842,
- "tag": "I Krp"
- },
- {
- "id": 739,
- "tag": "I Na,p"
- },
- {
- "id": 574,
- "tag": "I Na,t"
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- {
- "id": 843,
- "tag": "I Q"
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- {
- "id": 844,
- "tag": "I R"
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- "id": 575,
- "tag": "I T low threshold"
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- "id": 564,
- "tag": "ModelDB"
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- {
- "id": 1761,
- "tag": "ModelDB:150284"
- },
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- "id": 866,
- "tag": "Multiscale"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 620,
- "tag": "Python"
- },
- {
- "id": 751,
- "tag": "Signaling pathways"
- },
- {
- "id": 725,
- "tag": "Synaptic Plasticity"
- }
- ],
- "timestamp_created": "2024-01-12 09:40:30.488878+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/150284",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1224": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1224,
- "name": "A 1000 cell network model for Lateral Amygdala (Kim et al. 2013)",
- "repository_type": "github",
- "summary": "1000 Cell Lateral Amygdala model for investigation of plasticity and memory storage during Pavlovian Conditioning.",
- "tags": [
- {
- "id": 1684,
- "tag": "Ca pump"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 589,
- "tag": "I L high threshold"
- },
- {
- "id": 580,
- "tag": "I M"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 1433,
- "tag": "I_AHP"
- },
- {
- "id": 825,
- "tag": "Learning"
- },
- {
- "id": 749,
- "tag": "Long-term Synaptic Plasticity"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1762,
- "tag": "ModelDB:150288"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 1744,
- "tag": "Neuromodulation"
- },
- {
- "id": 724,
- "tag": "Short-term Synaptic Plasticity"
- },
- {
- "id": 725,
- "tag": "Synaptic Plasticity"
- }
- ],
- "timestamp_created": "2024-01-12 09:40:31.027751+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/150288",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1225": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1225,
- "name": "Network bursts in cultured NN result from different adaptive mechanisms (Masquelier & Deco 2013)",
- "repository_type": "github",
- "summary": "It is now well established that cultured neuron networks are spontaneously active, and tend to synchronize. Synchronous events typically involve the whole network, and have thus been termed \u201cnetwork spikes\u201d (NS). Using experimental recordings and numerical simulations, we show here that the inter-NS interval statistics are complex, and allow inferring the neural mechanisms at work, in particular the adaptive ones, and estimating a number of parameters to which we cannot access experimentally.",
- "tags": [
- {
- "id": 645,
- "tag": "Brian"
- },
- {
- "id": 566,
- "tag": "Bursting"
- },
- {
- "id": 722,
- "tag": "Depression"
- },
- {
- "id": 723,
- "tag": "Facilitation"
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- "id": 1433,
- "tag": "I_AHP"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1763,
- "tag": "ModelDB:150437"
- },
- {
- "id": 620,
- "tag": "Python"
- },
- {
- "id": 724,
- "tag": "Short-term Synaptic Plasticity"
- },
- {
- "id": 777,
- "tag": "Spike Frequency Adaptation"
- },
- {
- "id": 586,
- "tag": "Synchronization"
- },
- {
- "id": 720,
- "tag": "Temporal Pattern Generation"
- }
- ],
- "timestamp_created": "2024-01-12 09:40:31.593660+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/150437",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1226": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1226,
- "name": "Spontaneous weakly correlated excitation and inhibition (Tan et al. 2013)",
- "repository_type": "github",
- "summary": "Brian code for Tan et al. 2013.",
- "tags": [
- {
- "id": 645,
- "tag": "Brian"
- },
- {
- "id": 564,
- "tag": "ModelDB"
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- {
- "id": 1764,
- "tag": "ModelDB:150440"
- },
- {
- "id": 620,
- "tag": "Python"
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- {
- "id": 726,
- "tag": "Vision"
- }
- ],
- "timestamp_created": "2024-01-12 09:40:32.193886+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/150440",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1227": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1227,
- "name": "Interaural time difference detection by slowly integrating neurons (Vasilkov Tikidji-Hamburyan 2012)",
- "repository_type": "github",
- "summary": "For localization of a sound source, animals and humans process the microsecond interaural time differences of arriving sound waves. How nervous systems, consisting of elements with time constants of about and more than 1 ms, can reach such high precision is still an open question. This model shows that population of 10000 slowly integrating Hodgkin-Huxley neurons with inhibitory and excitatory inputs (EI neurons) can detect minute temporal disparities in input signals which are significantly less than any time constant in the system.",
- "tags": [
- {
- "id": 762,
- "tag": "Audition"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1765,
- "tag": "ModelDB:150445"
- },
- {
- "id": 577,
- "tag": "NEURON"
- }
- ],
- "timestamp_created": "2024-01-12 09:40:32.673407+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/150445",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1228": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1228,
- "name": "Synaptic gating at axonal branches, and sharp-wave ripples with replay (Vladimirov et al. 2013)",
- "repository_type": "github",
- "summary": "The computational model of in vivo sharp-wave ripples with place cell replay. Excitatory post-synaptic potentials at dendrites gate antidromic spikes arriving from the axonal collateral, and thus determine when the soma and the main axon fire. The model allows synchronous replay of pyramidal cells during sharp-wave ripple event, and the replay is possible in both forward and reverse directions.",
- "tags": [
- {
- "id": 727,
- "tag": "Action Potential Initiation"
- },
- {
- "id": 728,
- "tag": "Axonal Action Potentials"
- },
- {
- "id": 1527,
- "tag": "Brain Rhythms"
- },
- {
- "id": 745,
- "tag": "Conduction failure"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 591,
- "tag": "I K,leak"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 1433,
- "tag": "I_AHP"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1766,
- "tag": "ModelDB:150446"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 799,
- "tag": "Place cell/field"
- },
- {
- "id": 586,
- "tag": "Synchronization"
- }
- ],
- "timestamp_created": "2024-01-12 09:40:33.231830+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/150446",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1229": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1229,
- "name": "L5 pyr. cell spiking control by oscillatory inhibition in distal apical dendrites (Li et al 2013)",
- "repository_type": "github",
- "summary": "This model examined how distal oscillatory inhibition influences the firing of a biophysically-detailed layer 5 pyramidal neuron model.",
- "tags": [
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 1532,
- "tag": "I Na, leak"
- },
- {
- "id": 763,
- "tag": "Intrinsic plasticity"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1767,
- "tag": "ModelDB:150538"
- },
- {
- "id": 577,
- "tag": "NEURON"
- }
- ],
- "timestamp_created": "2024-01-12 09:40:33.809979+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/150538",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1230": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1230,
- "name": "Calcium waves and mGluR-dependent synaptic plasticity in CA1 pyr. neurons (Ashhad & Narayanan 2013)",
- "repository_type": "github",
- "summary": "A morphologically realistic, conductance-based model equipped with kinetic schemes that govern several calcium signalling modules and pathways in CA1 pyramidal neurons",
- "tags": [
- {
- "id": 579,
- "tag": "Active Dendrites"
- },
- {
- "id": 1684,
- "tag": "Ca pump"
- },
- {
- "id": 572,
- "tag": "Calcium dynamics"
- },
- {
- "id": 790,
- "tag": "Calcium waves"
- },
- {
- "id": 781,
- "tag": "G-protein coupled"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 589,
- "tag": "I L high threshold"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 575,
- "tag": "I T low threshold"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1768,
- "tag": "ModelDB:150551"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 751,
- "tag": "Signaling pathways"
- },
- {
- "id": 725,
- "tag": "Synaptic Plasticity"
- }
- ],
- "timestamp_created": "2024-01-12 09:40:34.339989+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/150551",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1231": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1231,
- "name": "Single compartment Dorsal Lateral Medium Spiny Neuron w/ NMDA and AMPA (Biddell and Johnson 2013)",
- "repository_type": "github",
- "summary": "A biophysical single compartment model of the dorsal lateral striatum medium spiny neuron is presented here. The model is an implementation then adaptation of a previously described model (Mahon et al. 2002). The model has been adapted to include NMDA and AMPA receptor models that have been fit to dorsal lateral striatal neurons. The receptor models allow for excitation by other neuron models.",
- "tags": [
- {
- "id": 831,
- "tag": "Deep brain stimulation"
- },
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 730,
- "tag": "I A, slow"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 591,
- "tag": "I K,leak"
- },
- {
- "id": 842,
- "tag": "I Krp"
- },
- {
- "id": 1532,
- "tag": "I Na, leak"
- },
- {
- "id": 739,
- "tag": "I Na,p"
- },
- {
- "id": 783,
- "tag": "I_Ks"
- },
- {
- "id": 825,
- "tag": "Learning"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1769,
- "tag": "ModelDB:150556"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 588,
- "tag": "Olfaction"
- },
- {
- "id": 801,
- "tag": "Parkinson's"
- },
- {
- "id": 724,
- "tag": "Short-term Synaptic Plasticity"
- }
- ],
- "timestamp_created": "2024-01-12 09:40:34.871447+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/150556",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1232": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1232,
- "name": "Striatal Output Neuron (Mahon, Deniau, Charpier, Delord 2000)",
- "repository_type": "github",
- "summary": "Striatal output neurons (SONs) integrate glutamatergic synaptic inputs originating from the cerebral cortex. In vivo electrophysiological data have shown that a prior depolarization of SONs induced a short-term (1 sec)increase in their membrane excitability, which facilitated the ability of corticostriatal synaptic potentials to induce firing. Here we propose, using a computational model of SONs, that the use-dependent, short-term increase in the responsiveness of SONs mainly results from the slow kinetics of a voltage-dependent, slowly inactivating potassium A-current. This mechanism confers on SONs a form of intrinsic short-term memory that optimizes the synaptic input\u00e2\u20ac\u201coutput relationship as a function of their past activation.",
- "tags": [
- {
- "id": 727,
- "tag": "Action Potential Initiation"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 842,
- "tag": "I Krp"
- },
- {
- "id": 739,
- "tag": "I Na,p"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 783,
- "tag": "I_Ks"
- },
- {
- "id": 567,
- "tag": "Ion Channel Kinetics"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1770,
- "tag": "ModelDB:150621"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 724,
- "tag": "Short-term Synaptic Plasticity"
- }
- ],
- "timestamp_created": "2024-01-12 09:40:35.411584+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/150621",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1233": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1233,
- "name": "Revised opponent-channel model of auditory space cortical representation (Briley & Summerfield 2013)",
- "repository_type": "github",
- "summary": "This is the computational opponent-channel model used by Briley et al. (2013) to model electroencephalographic (EEG) responses from the auditory cortices of young, younger-old and older-old adults to abrupt shifts in sound-source location, and to predict each groups' psychophysical measures of spatial acuity.",
- "tags": [
- {
- "id": 762,
- "tag": "Audition"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1771,
- "tag": "ModelDB:150622"
- },
- {
- "id": 758,
- "tag": "Sensory processing"
- }
- ],
- "timestamp_created": "2024-01-12 09:40:35.997014+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/150622",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1234": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 1234,
- "name": "Stochastic calcium mechanisms cause dendritic calcium spike variability (Anwar et al. 2013)",
- "repository_type": "github",
- "summary": "\" ...\r\nIn single Purkinje cells, spontaneous and synaptically evoked\r\ndendritic calcium bursts come in a variety of shapes with a variable number of\r\nspikes. \r\n\r\nThe mechanisms causing this variability have never been investigated thoroughly.\r\n\r\nIn this study, a detailed computational model employing novel simulation routines is\r\napplied to identify the roles that stochastic ion channels, spatial arrangements of ion\r\nchannels and stochastic intracellular calcium have towards producing calcium burst\r\nvariability.\r\n\u2026\r\nOur findings suggest that stochastic intracellular calcium\r\nmechanisms play a crucial role in dendritic calcium spike generation and are, therefore, an\r\nessential consideration in studies of neuronal excitability and plasticity.\"",
- "tags": [
- {
- "id": 579,
- "tag": "Active Dendrites"
- },
- {
- "id": 1684,
- "tag": "Ca pump"
- },
- {
- "id": 572,
- "tag": "Calcium dynamics"
- },
- {
- "id": 565,
- "tag": "Dendritic Action Potentials"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 575,
- "tag": "I T low threshold"
- },
- {
- "id": 742,
- "tag": "I p,q"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1772,
- "tag": "ModelDB:150635"
- },
- {
- "id": 1773,
- "tag": "STEPS (web link to model)"
- }
- ],
- "timestamp_created": "2024-01-12 09:40:36.553568+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/150635",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1235": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1235,
- "name": "Auditory cortex layer IV network model (Beeman 2013)",
- "repository_type": "github",
- "summary": "\"... The primary objective of this modeling study was to determine the effects of axonal conduction velocity (often neglected, but significant), as well as synaptic time constants, on the ability of such a network to create and propagate cortical waves. ... The model is also being used to study the interaction between single and two-tone input and normal background activity, and the effects of synaptic depression from thalamic inputs. The simulation scripts have the additional purpose of serving as tutorial examples for the construction of cortical networks with GENESIS. The present model has fostered the development of the G-3 Python network analysis and visualization tools used in this study... It is my hope that this short tutorial and the example\r\nsimulation scripts can provide a head start for a graduate student or\r\npostdoc who is beginning a cortical modeling project.\r\n\"",
- "tags": [
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 600,
- "tag": "GENESIS"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1774,
- "tag": "ModelDB:150678"
- },
- {
- "id": 732,
- "tag": "Tutorial/Teaching"
- }
- ],
- "timestamp_created": "2024-01-12 09:40:37.202348+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/150678",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1236": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1236,
- "name": "Model of arrhythmias in a cardiac cells network (Casaleggio et al. 2014)",
- "repository_type": "github",
- "summary": "\" ... Here we explore the possible processes leading to the occasional onset and termination of the (usually) non-fatal arrhythmias widely observed in the heart.\r\n\r\nUsing a computational model of a two-dimensional network of cardiac cells, we tested the hypothesis that an ischemia alters the properties of the gap junctions inside the ischemic area.\r\n...\r\n In conclusion, our model strongly supports the hypothesis that non-fatal arrhythmias can develop from post-ischemic alteration of the electrical connectivity in a relatively small area of the cardiac cell network, and suggests experimentally testable predictions on their possible treatments.\"",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 1606,
- "tag": "Conductance distributions"
- },
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 737,
- "tag": "Heart disease"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1775,
- "tag": "ModelDB:150691"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 587,
- "tag": "Spatio-temporal Activity Patterns"
- }
- ],
- "timestamp_created": "2024-01-12 09:40:37.758894+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/150691",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1237": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1237,
- "name": "Crayfish hybrid experimental model (Chung et al. 2015)",
- "repository_type": "github",
- "summary": "The Crayfish hybrid experimental model is an AnimatLab v1 neuromechanical model of the crayfish thorax and 5th walking leg that provides a virtual periphery to the live crayfish central nervous system. Run in real time, levator and depressor muscles are excited by motor nerve discharges of the CNS. Up and down movement of the leg shortens and stretches a model stretch receptor that controls movement of a real stretch receptor that provides sensory feedback to the CNS. Real-time sensory feedback provided by the model increases the locomotor cycle frequency by three-fold.",
- "tags": [
- {
- "id": 1776,
- "tag": "AnimatLab v1"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1777,
- "tag": "ModelDB:150697"
- }
- ],
- "timestamp_created": "2024-01-12 09:40:38.320978+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/150697",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1238": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1238,
- "name": "Crayfish hybrid simulation model (Bacque-Cazenave et al. 2014)",
- "repository_type": "github",
- "summary": "A neuromechanical model of the crayfish leg and thorax and the postural and locomotor circuitry built and run in AnimatLab v1. The model simulates experiments run with the BCI preparation model in which the model was linked in real time to the in vivo crayfish thoracic nerve cord. The model shows that current understanding of the neural circuitry can account for the increase in locomotor frequency when the sensori-motor feedback loop is intact.",
- "tags": [
- {
- "id": 1776,
- "tag": "AnimatLab v1"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1778,
- "tag": "ModelDB:150698"
- },
- {
- "id": 1779,
- "tag": "Posture and locomotion"
- }
- ],
- "timestamp_created": "2024-01-12 09:40:39.008536+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/150698",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1239": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1239,
- "name": "Computational modelling of channelrhodopsin-2 photocurrent characteristics (Stefanescu et al. 2013)",
- "repository_type": "github",
- "summary": "The codes are directly related with the results presented in the manuscript; in brief, it is a computational investigation on the effects of optogenetic actuation on excitatory and inhibitory neurons when 3- and 4- state model is used to implement the ChR2 kinetics. Different parameters of optostimulation are investigated and the results compared with experimental data previously published by other research groups.",
- "tags": [
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1780,
- "tag": "ModelDB:150804"
- }
- ],
- "timestamp_created": "2024-01-12 09:40:39.537011+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/150804",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1240": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1240,
- "name": "Dynamic cortical interlaminar interactions (Carracedo et al. 2013)",
- "repository_type": "github",
- "summary": "\"... Here we demonstrate the mechanism underlying a purely neocortical delta rhythm generator and show a remarkable laminar, cell subtype and local subcircuit delineation between delta\r\nand nested theta rhythms. We show that spike timing during delta-nested theta rhythms controls an iterative, reciprocal interaction between deep and superficial cortical layers resembling the unsupervised learning processes proposed for laminar neural networks by Hinton and colleagues ... and mimicking the alternating cortical dynamics of sensory and memory processing during wakefulness.\"\r\n",
- "tags": [
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 566,
- "tag": "Bursting"
- },
- {
- "id": 710,
- "tag": "FORTRAN"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 730,
- "tag": "I A, slow"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 589,
- "tag": "I L high threshold"
- },
- {
- "id": 580,
- "tag": "I M"
- },
- {
- "id": 739,
- "tag": "I Na,p"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1781,
- "tag": "ModelDB:150806"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 592,
- "tag": "Sleep"
- }
- ],
- "timestamp_created": "2024-01-12 09:40:40.073465+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/150806",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1241": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1241,
- "name": "Grid cells from place cells (Castro & Aguiar, 2014)",
- "repository_type": "github",
- "summary": "\" ...Here we present a novel model for the emergence of gridlike firing patterns that stands on two key hypotheses: (1) spatial information in GCs is provided from PC activity and (2) grid fields result from a combined synaptic plasticity mechanism involving inhibitory and excitatory neurons mediating the connections between PCs and GCs. ...\"",
- "tags": [
- {
- "id": 1461,
- "tag": "Grid cell"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1782,
- "tag": "ModelDB:150846"
- },
- {
- "id": 799,
- "tag": "Place cell/field"
- },
- {
- "id": 791,
- "tag": "Rate-coding model neurons"
- },
- {
- "id": 725,
- "tag": "Synaptic Plasticity"
- }
- ],
- "timestamp_created": "2024-01-12 09:40:40.590675+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/150846",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1242": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1242,
- "name": "Calcium influx during striatal upstates (Evans et al. 2013)",
- "repository_type": "github",
- "summary": "\"...\r\nTo\r\ninvestigate the mechanisms that underlie the relationship between\r\ncalcium and AP timing, we have developed a realistic biophysical\r\nmodel of a medium spiny neuron (MSN).\r\n...\r\nUsing this model, we found that either the slow inactivation of\r\ndendritic sodium channels (NaSI) or the calcium inactivation of\r\nvoltage-gated calcium channels (CDI) can cause high calcium corresponding\r\nto early APs and lower calcium corresponding to later APs.\r\n\r\nWe found that only CDI can account for the experimental observation\r\nthat sensitivity to AP timing is dependent on NMDA receptors.\r\n\r\nAdditional simulations demonstrated a mechanism by which MSNs\r\ncan dynamically modulate their sensitivity to AP timing and show that\r\nsensitivity to specifically timed pre- and postsynaptic pairings (as in\r\nspike timing-dependent plasticity protocols) is altered by the timing of\r\nthe pairing within the upstate.\r\n\u2026\"",
- "tags": [
- {
- "id": 572,
- "tag": "Calcium dynamics"
- },
- {
- "id": 600,
- "tag": "GENESIS"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 730,
- "tag": "I A, slow"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 842,
- "tag": "I Krp"
- },
- {
- "id": 589,
- "tag": "I L high threshold"
- },
- {
- "id": 721,
- "tag": "I N"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 844,
- "tag": "I R"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1783,
- "tag": "ModelDB:150912"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 802,
- "tag": "STDP"
- }
- ],
- "timestamp_created": "2024-01-12 09:40:41.102792+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/150912",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1243": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1243,
- "name": "Effects of increasing CREB on storage and recall processes in a CA1 network (Bianchi et al. 2014)",
- "repository_type": "github",
- "summary": "Several recent results suggest that boosting the CREB pathway improves hippocampal-dependent memory in healthy rodents and restores this type of\r\nmemory in an AD mouse model. However, not much is known about how CREB-dependent neuronal alterations in synaptic strength, excitability and\r\nLTP can boost memory formation in the complex architecture of a neuronal network. Using a model of a CA1 microcircuit, we investigate whether\r\nhippocampal CA1 pyramidal neuron properties altered by increasing CREB activity may contribute to improve memory storage and recall. With a set of patterns presented to a network, we find that the pattern recall quality under AD-like conditions is significantly better when boosting CREB function with respect to control. The results are robust and consistent upon increasing the synaptic damage expected by AD progression, supporting the idea that the use of CREB-based therapies could provide a new approach\r\nto treat AD.",
- "tags": [
- {
- "id": 827,
- "tag": "Aging/Alzheimer`s"
- },
- {
- "id": 1739,
- "tag": "CREB"
- },
- {
- "id": 1684,
- "tag": "Ca pump"
- },
- {
- "id": 873,
- "tag": "Depolarization block"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 1531,
- "tag": "I Cl, leak"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 580,
- "tag": "I M"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 1433,
- "tag": "I_AHP"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1784,
- "tag": "ModelDB:151126"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 802,
- "tag": "STDP"
- },
- {
- "id": 1377,
- "tag": "Storage/recall"
- }
- ],
- "timestamp_created": "2024-01-12 09:40:41.653533+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/151126",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1244": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1244,
- "name": "Ih tunes oscillations in an In Silico CA3 model (Neymotin et al. 2013)",
- "repository_type": "github",
- "summary": "\" ... We investigated oscillatory control using a multiscale computer model of hippocampal CA3, where each cell class\r\n(pyramidal, basket, and oriens-lacunosum moleculare cells), contained type-appropriate isoforms of Ih.\r\n\r\nOur model\r\ndemonstrated that modulation of pyramidal and basket Ih allows tuning theta and gamma oscillation frequency and\r\namplitude. Pyramidal Ih also controlled cross-frequency coupling (CFC) and allowed shifting gamma generation towards\r\nparticular phases of the theta cycle, effected via Ih\u2019s ability to set pyramidal excitability. ...\"",
- "tags": [
- {
- "id": 1527,
- "tag": "Brain Rhythms"
- },
- {
- "id": 1606,
- "tag": "Conductance distributions"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 591,
- "tag": "I K,leak"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
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- "timestamp_created": "2024-01-12 09:40:42.216906+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/151282",
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- "name": "Gating of steering signals through phasic modulation of reticulospinal neurons (Kozlov et al. 2014)",
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- "summary": "\" ... We use the lamprey as a model for investigating the role of this\r\nphasic modulation of the reticulospinal activity, because the\r\nbrainstem\u2013spinal cord networks are known down to the cellular level in\r\nthis phylogenetically oldest extant vertebrate.\r\n\r\nWe describe how the phasic modulation of reticulospinal activity from\r\nthe spinal CPG ensures reliable steering/turning commands without the\r\nneed for a very precise timing of on- or offset, by using a\r\nbiophysically detailed large-scale (19,600 model neurons and 646,800\r\nsynapses) computational model of the lamprey brainstem\u2013spinal cord\r\nnetwork.\r\n\r\nTo verify that the simulated neural network can control body\r\nmovements, including turning, the spinal activity is fed to a\r\nmechanical model of lamprey swimming.\r\n...\"",
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- "id": 566,
- "tag": "Bursting"
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- "id": 571,
- "tag": "Detailed Neuronal Models"
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- "timestamp_created": "2024-01-12 09:40:42.772032+00:00",
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- "uri": "https://github.com/OpenSourceBrain/151338",
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- "id": 1246,
- "name": "Excitatory synaptic interactions in pyramidal neuron dendrites (Behabadi et al. 2012)",
- "repository_type": "github",
- "summary": "\" ...\r\nWe hypothesized that if two excitatory pathways bias their synaptic projections towards proximal vs. distal ends of the basal branches, the very different local spike thresholds and attenuation factors for inputs near and far from the soma might provide the basis for a classical-contextual functional asymmetry. Supporting this possibility, we found both in compartmental models and electrophysiological recordings in brain slices that the responses of basal dendrites to spatially separated inputs are indeed strongly asymmetric.\r\n...\"",
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- {
- "id": 579,
- "tag": "Active Dendrites"
- },
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- "id": 565,
- "tag": "Dendritic Action Potentials"
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- "timestamp_created": "2024-01-12 09:40:43.308189+00:00",
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- "name": "Recurrent discharge in a reduced model of cat spinal motoneuron (Balbi et al, 2013)",
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- "summary": "Following a distal stimulation of a motor fibre, only a fraction of spinal motoneurons are able to produce a re-excitation of the initial segment leading to an orthodromically conducted action potential, known as recurrent discharge. In order to show the reciprocal interplay of the axonal initial segment and the soma leading to recurrent discharge in detail, a reduced model of a cat spinal motoneuron was developed.",
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- "tag": "I K"
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- "timestamp_created": "2024-01-12 09:40:43.881756+00:00",
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- "summary": "We construct an electric compartment model of the striatal medium spiny neuron with a realistic morphology and predict the calcium responses in the synaptic spines with variable timings of the glutamatergic and dopaminergic inputs and the postsynaptic action potentials.\r\nThe model was validated by reproducing the responses to current inputs and could predict the electric and calcium responses to glutamatergic inputs and back-propagating action potential in the proximal and distal synaptic spines during up and down states.",
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- "timestamp_created": "2024-01-12 09:40:44.572782+00:00",
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- "name": "DBS of a multi-compartment model of subthalamic nucleus projection neurons (Miocinovic et al. 2006)",
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- "summary": "We built a comprehensive computational model of subthalamic nucleus (STN) deep brain stimulation (DBS) in parkinsonian macaques to study the effects of stimulation in a controlled environment. The model consisted of three fundamental components: 1) a three-dimensional (3D) anatomical model of the macaque basal ganglia, 2) a finite element model of the DBS electrode and electric field transmitted to the tissue medium, and 3) multicompartment biophysical models of STN projection neurons, GPi fibers of passage, and internal capsule fibers of passage. Populations of neurons were positioned within the 3D anatomical model. Neurons were stimulated with electrode positions and stimulation parameters defined as clinically effective in two parkinsonian monkeys. The model predicted axonal activation of STN neurons and GPi fibers during STN DBS. Model predictions regarding the degree of GPi fiber activation matched well with experimental recordings in both monkeys.",
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- "id": 727,
- "tag": "Action Potential Initiation"
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- "id": 736,
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- "tag": "Deep brain stimulation"
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- "id": 801,
- "tag": "Parkinson's"
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- "timestamp_created": "2024-01-12 09:40:45.246370+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/151460",
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- "name": "Sympathetic Preganglionic Neurone (Briant et al. 2014)",
- "repository_type": "github",
- "summary": "A model of a sympathetic preganglionic neurone of muscle vasoconstrictor-type.",
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- "id": 727,
- "tag": "Action Potential Initiation"
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- "id": 736,
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- "tag": "Parameter Fitting"
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- "tag": "Temporal Pattern Generation"
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- "timestamp_created": "2024-01-12 09:40:45.848718+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/151482",
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- "id": 1251,
- "name": "Simulating ion channel noise in an auditory brainstem neuron model (Schmerl & McDonnell 2013)",
- "repository_type": "github",
- "summary": "\" ... Here we demonstrate that biophysical models of channel noise can give rise to two\r\nkinds of recently discovered stochastic facilitation effects in a Hodgkin-Huxley-like model of auditory brainstem\r\nneurons. The first, known as slope-based stochastic resonance (SBSR), enables phasic neurons to emit action\r\npotentials that can encode the slope of inputs that vary slowly relative to key time constants in the model. \r\n\r\nThe\r\nsecond, known as inverse stochastic resonance (ISR), occurs in tonically firing neurons when small levels of\r\nnoise inhibit tonic firing and replace it with burstlike dynamics. ...\"\r\nPreprint available at http://arxiv.org/abs/1311.2643",
- "tags": [
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- "id": 736,
- "tag": "Action Potentials"
- },
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- "id": 762,
- "tag": "Audition"
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- "id": 804,
- "tag": "Bifurcation"
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- "id": 566,
- "tag": "Bursting"
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- "id": 584,
- "tag": "I Potassium"
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- "id": 582,
- "tag": "I Sodium"
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- "id": 594,
- "tag": "I h"
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- "id": 567,
- "tag": "Ion Channel Kinetics"
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- "tag": "Methods"
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- "id": 1793,
- "tag": "ModelDB:151483"
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- "id": 874,
- "tag": "Noise Sensitivity"
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- "timestamp_created": "2024-01-12 09:40:46.458326+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/151483",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "default_context": "main",
- "id": 1252,
- "name": "Voltage and light-sensitive Channelrhodopsin-2 model (ChR2) (Williams et al. 2013)",
- "repository_type": "github",
- "summary": "\" ... \r\nFocusing on one of the most widely used ChR2 mutants\r\n(H134R) with enhanced current, we collected a comprehensive\r\nexperimental data set of the response of this ion channel to different\r\nirradiances and voltages, and used these data to develop a model of\r\nChR2 with empirically-derived voltage- and irradiance- dependence,\r\nwhere parameters were fine-tuned via simulated annealing\r\noptimization.\r\n\r\nThis ChR2 model offers: 1) accurate inward rectification\r\nin the current-voltage response across irradiances; 2)\r\nempirically-derived voltage- and light-dependent kinetics (activation,\r\ndeactivation and recovery from inactivation); and 3) accurate\r\namplitude and morphology of the response across voltage and irradiance\r\nsettings. \r\n\r\nTemperature-scaling factors (Q10) were derived and model kinetics was\r\nadjusted to physiological temperatures.\r\n... \"",
- "tags": [
- {
- "id": 1794,
- "tag": "Channelrhodopsin (ChR)"
- },
- {
- "id": 567,
- "tag": "Ion Channel Kinetics"
- },
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- "id": 767,
- "tag": "MATLAB (web link to model)"
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- "id": 756,
- "tag": "Methods"
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- "id": 564,
- "tag": "ModelDB"
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- "id": 1795,
- "tag": "ModelDB:151549"
- }
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- "timestamp_created": "2024-01-12 09:40:46.977864+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/151549",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1253": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1253,
- "name": "Tapered whiskers are required for active tactile sensation (Hires et al. 2013)",
- "repository_type": "github",
- "summary": "\" ... \r\nThe diverse shapes of facial whiskers reflect distinct ecological niches. Rodent whiskers\r\nare conical, often with a remarkably linear taper. \r\n\r\nHere we use theoretical and experimental methods\r\nto analyze interactions of mouse whiskers with objects. \r\n... \"\r\n\r\nThis is a quasi-static solution of the bending of an isolated whisker.\r\n\r\nFor Fig. 2, stable solution, use: theta=-0.174533 rad.\r\n\r\nUse \"Bndryval -> Show\" in XPPAUT.\r\n",
- "tags": [
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1796,
- "tag": "ModelDB:151677"
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- "id": 759,
- "tag": "XPPAUT"
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- ],
- "timestamp_created": "2024-01-12 09:40:47.769221+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/151677",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "1254": {
- "auto_sync": true,
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- "default_context": "master",
- "id": 1254,
- "name": "3D model of the olfactory bulb (Migliore et al. 2014)",
- "repository_type": "github",
- "summary": "This entry contains a link to a full HD version of movie 1 and the NEURON code of the paper:\r\n\"Distributed organization of a brain microcircuit analysed by three-dimensional modeling: the olfactory bulb\" by M Migliore, F Cavarretta, ML Hines, and GM Shepherd.",
- "tags": [
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- "id": 736,
- "tag": "Action Potentials"
- },
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- "id": 579,
- "tag": "Active Dendrites"
- },
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- "id": 578,
- "tag": "Activity Patterns"
- },
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- "id": 566,
- "tag": "Bursting"
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- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 574,
- "tag": "I Na,t"
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- {
- "id": 564,
- "tag": "ModelDB"
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- "id": 1797,
- "tag": "ModelDB:151681"
- },
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- "id": 577,
- "tag": "NEURON"
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- {
- "id": 588,
- "tag": "Olfaction"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 719,
- "tag": "Pattern Recognition"
- },
- {
- "id": 596,
- "tag": "Synaptic Integration"
- },
- {
- "id": 725,
- "tag": "Synaptic Plasticity"
- },
- {
- "id": 586,
- "tag": "Synchronization"
- },
- {
- "id": 720,
- "tag": "Temporal Pattern Generation"
- },
- {
- "id": 803,
- "tag": "Unsupervised Learning"
- }
- ],
- "timestamp_created": "2024-01-12 09:40:48.286205+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/151681",
- "user": {
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- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "id": 1255,
- "name": "Current Dipole in Laminar Neocortex (Lee et al. 2013)",
- "repository_type": "github",
- "summary": "Laminar neocortical model in NEURON/Python, adapted from Jones et al 2009.\r\n\r\nhttps://bitbucket.org/jonescompneurolab/corticaldipole",
- "tags": [
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 1798,
- "tag": "Current Dipole"
- },
- {
- "id": 1799,
- "tag": "Gamma oscillations"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 580,
- "tag": "I M"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 575,
- "tag": "I T low threshold"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 851,
- "tag": "Magnetoencephalography"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1800,
- "tag": "ModelDB:151685"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 743,
- "tag": "NEURON (web link to model)"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 620,
- "tag": "Python"
- },
- {
- "id": 853,
- "tag": "Python (web link to model)"
- },
- {
- "id": 720,
- "tag": "Temporal Pattern Generation"
- },
- {
- "id": 764,
- "tag": "Touch"
- }
- ],
- "timestamp_created": "2024-01-12 09:40:48.884748+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/151685",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "name": "Stochastic model of the olfactory cilium transduction and adaptation (Antunes et al 2014)",
- "repository_type": "github",
- "summary": "\" ... In this work, we have combined stochastic computational modeling and\r\n a systematic pharmacological study of different signaling pathways to\r\n investigate their impact during short-term adaptation (STA).\r\n\r\n...\r\nThese results suggest that G-coupled\r\n receptors (GPCRs) cycling is involved with the occurrence of STA. To\r\n gain insights on the dynamical aspects of this process, we developed\r\n a stochastic computational model. The model consists of the olfactory\r\n transduction currents mediated by the cyclic nucleotide gated (CNG)\r\n channels and calcium ion (Ca2+)-activated chloride (CAC) channels,\r\n and the dynamics of their respective ligands, cAMP and Ca2+, and it\r\n simulates the EOG (electroolfactogram)\r\nresults obtained under different experimental\r\n conditions through changes in the amplitude and duration of cAMP and\r\n Ca2+ response, two second messengers implicated with STA\r\n occurrence. The model reproduced the experimental data for each\r\n pharmacological treatment and provided a mechanistic explanation for\r\n the action of GPCR cycling in the levels of second messengers\r\n modulating the levels of STA. All together, these experimental and\r\n theoretical results indicate the existence of a mechanism of\r\n regulation of STA by signaling pathways that control GPCR cycling and\r\n tune the levels of second messengers in OSNs, and not only by CNG\r\n channel desensitization as previously thought. \"",
- "tags": [
- {
- "id": 1801,
- "tag": "COPASI"
- },
- {
- "id": 572,
- "tag": "Calcium dynamics"
- },
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 567,
- "tag": "Ion Channel Kinetics"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1802,
- "tag": "ModelDB:151686"
- },
- {
- "id": 588,
- "tag": "Olfaction"
- },
- {
- "id": 751,
- "tag": "Signaling pathways"
- }
- ],
- "timestamp_created": "2024-01-12 09:40:49.505114+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/151686",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1257": {
- "auto_sync": true,
- "content_types": "modeling",
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- "modeling"
- ],
- "default_context": "master",
- "id": 1257,
- "name": "Statistics of symmetry measure for networks of neurons (Esposito et al. 2014)",
- "repository_type": "github",
- "summary": "The code reproduces Figures 1, 2, 3A and 3C from Esposito et al \"Measuring symmetry, asymmetry and randomness in neural networks\". It provides the statistics of the symmetry measure defined in the paper for networks of neurons with random connections drawn from uniform and gaussian distributions.",
- "tags": [
- {
- "id": 855,
- "tag": "Connectivity matrix"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1803,
- "tag": "ModelDB:151692"
- }
- ],
- "timestamp_created": "2024-01-12 09:40:50.052748+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/151692",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1258": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1258,
- "name": "CA1 pyramidal neurons: effect of external electric field from power lines (Cavarretta et al. 2014)",
- "repository_type": "github",
- "summary": "The paper discusses the effects induced by an electric field at power lines frequency.",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 579,
- "tag": "Active Dendrites"
- },
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 565,
- "tag": "Dendritic Action Potentials"
- },
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 734,
- "tag": "Extracellular Fields"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1804,
- "tag": "ModelDB:151731"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 596,
- "tag": "Synaptic Integration"
- }
- ],
- "timestamp_created": "2024-01-12 09:40:50.632404+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/151731",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1259": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1259,
- "name": "Model of repetitive firing in Grueneberg ganglion olfactory neurons (Liu et al., 2012)",
- "repository_type": "github",
- "summary": "This model is constructed based on properties of Na+ and K+ currents observed in whole-cell patch clamp recordings of mouse Grueneberg ganglion neurons in acute slices. Two distinct Na+ conductances representing the TTX-sensitive and TTX-resistant currents and one delayed rectifier K+ currrent are included. By modulating the maximal conductances of Na+ currents, one can reproduce the regular, phasic, and sporadic patterns of repetitive firing found in the patch clamp experiments.",
- "tags": [
- {
- "id": 727,
- "tag": "Action Potential Initiation"
- },
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 591,
- "tag": "I K,leak"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1805,
- "tag": "ModelDB:151817"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 588,
- "tag": "Olfaction"
- },
- {
- "id": 573,
- "tag": "Rebound firing"
- },
- {
- "id": 1789,
- "tag": "Recurrent Discharge"
- },
- {
- "id": 720,
- "tag": "Temporal Pattern Generation"
- }
- ],
- "timestamp_created": "2024-01-12 09:40:51.167085+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/151817",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1260": {
- "auto_sync": true,
- "content_types": "modeling",
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- "modeling"
- ],
- "default_context": "master",
- "id": 1260,
- "name": "Ionic mechanisms of dendritic spikes (Almog and Korngreen 2014)",
- "repository_type": "github",
- "summary": "We used a combined experimental and numerical parameter peeling procedure was implemented to optimize a detailed ionic mechanism for the generation and propagation of dendritic spikes in neocortical L5 pyramidal neurons. \r\n\r\nRun the cc_run.hoc to get a demo for dendritic calcium spike generated by coincidence of a back-propagating AP and distal synaptic input.",
- "tags": [
- {
- "id": 1684,
- "tag": "Ca pump"
- },
- {
- "id": 565,
- "tag": "Dendritic Action Potentials"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 731,
- "tag": "I CAN"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 1806,
- "tag": "ModelDB:151825"
- },
- {
- "id": 577,
- "tag": "NEURON"
- }
- ],
- "timestamp_created": "2024-01-12 09:40:51.684089+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/151825",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1261": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1261,
- "name": "Electrodiffusive astrocytic and extracellular ion concentration dynamics model (Halnes et al. 2013)",
- "repository_type": "github",
- "summary": "An electrodiffusive formalism was developed for computing the dynamics of the membrane potential\r\nand ion concentrations in the intra- and extracellular space in a one-dimensional geometry (cable). This (general) formalism was implemented in a model of astrocytes exchanging K+, Na+ and Cl- ions with the extracellular space (ECS). \r\nA limited region (0< x1 yr) persistence of groups of strong synapses. A unimodal weight distribution results. For stability of this distribution it proved\r\nessential to incorporate resource competition between synapses organized into small clusters. ...\"",
- "tags": [
- {
- "id": 849,
- "tag": "Java (web link to model)"
- },
- {
- "id": 749,
- "tag": "Long-term Synaptic Plasticity"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2070,
- "tag": "ModelDB:185875"
- }
- ],
- "timestamp_created": "2024-01-12 09:56:05.791822+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/185875",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1497": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1497,
- "name": "CA3 Network Model of Epileptic Activity (Sanjay et. al, 2015)",
- "repository_type": "github",
- "summary": "This computational study investigates how a CA3 neuronal network consisting of pyramidal cells, basket cells and OLM interneurons becomes epileptic when dendritic inhibition to pyramidal cells is impaired due to the dysfunction of OLM interneurons. After standardizing the baseline activity (theta-modulated gamma oscillations), systematic changes are made in the connectivities between the neurons, as a result of step-wise impairment of dendritic inhibition.",
- "tags": [
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 1527,
- "tag": "Brain Rhythms"
- },
- {
- "id": 469,
- "tag": "Epilepsy"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2071,
- "tag": "ModelDB:186768"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 787,
- "tag": "Pathophysiology"
- },
- {
- "id": 620,
- "tag": "Python"
- }
- ],
- "timestamp_created": "2024-01-12 09:56:06.290752+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/186768",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1498": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1498,
- "name": "H-currents effect on the fluctuation of gamma/beta oscillations (Avella-Gonzalez et al., 2015)",
- "repository_type": "github",
- "summary": "This model was designed to study the impact of H-currents on\r\nthe dynamics of cortical oscillations, and in paticular on\r\nthe occurrence of high and low amplitude episodes (HAE, LAE) in network oscillations.\r\nThe H-current is a slow, hyperpolarization-activated, depolarizing current\r\nthat contributes to neuronal resonance and membrane potential.\r\n\r\nWe characterized amplitude fluctuations in network oscillations by measuring \r\nthe average durations of HAEs and LAEs, and explored\r\nhow these were modulated by trains of external spikes, both in \r\nthe presence and absence of H-channels. \r\n\r\nWe looked at HAE duration, the frequency\r\nand power of network oscillations, and the effect\r\nof H-channels on the temporal voltage profile in single cells.\r\n\r\nWe found that H-currents increased the oscillation frequency and, in combination with external spikes, representing input from areas outside the network, strongly decreased the synchrony of firing. As a consequence, the oscillation power and the duration of episodes during which the network exhibited high-amplitude oscillations were greatly reduced in the presence of H-channels.",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2072,
- "tag": "ModelDB:186977"
- },
- {
- "id": 577,
- "tag": "NEURON"
- }
- ],
- "timestamp_created": "2024-01-12 09:56:06.807103+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/186977",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1499": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1499,
- "name": "Anoxic depolarization, recovery: effect of brain regions and extracellular space (Hubel et al. 2016)",
- "repository_type": "github",
- "summary": "The extent of anoxic depolarization (AD), the initial electrophysiological event during ischemia, determines the degree of brain region-specific neuronal damage. Neurons in higher brain regions have stronger ADs and are more easily injured than neurons in lower brain region. The mechanism leading to such differences is not clear. We use a computational model based on a Hodgkin-Huxley framework which includes neural spiking dynamics, processes of ion accumulation, and homeostatic mechanisms like vascular coupling and Na/K-exchange pumps. We show that a large extracellular space (ECS) explains the recovery failure in high brain regions. A phase-space analysis shows that with a large ECS recovery from AD through potassium regulation is impossible. The code 'time_series.ode' can be used to simulate AD for a large and a small ECS and show the different behaviors. The code \u2018continuations.ode\u2019 can be used to show the fixed point structure. Depending on our choice of large or small ECS the fixed point curve implies the presence/absence of a recovery threshold that defines the potassium clearance demand.",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 873,
- "tag": "Depolarization block"
- },
- {
- "id": 75,
- "tag": "Homeostasis"
- },
- {
- "id": 765,
- "tag": "I Chloride"
- },
- {
- "id": 1531,
- "tag": "I Cl, leak"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 591,
- "tag": "I K,leak"
- },
- {
- "id": 1532,
- "tag": "I Na, leak"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 861,
- "tag": "I_K,Na"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2073,
- "tag": "ModelDB:187213"
- },
- {
- "id": 740,
- "tag": "Na/K pump"
- },
- {
- "id": 787,
- "tag": "Pathophysiology"
- },
- {
- "id": 1808,
- "tag": "Potassium buffering"
- },
- {
- "id": 741,
- "tag": "Sodium pump"
- },
- {
- "id": 759,
- "tag": "XPPAUT"
- }
- ],
- "timestamp_created": "2024-01-12 09:56:07.338217+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/187213",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "name": "A model of the T-junction of a C-fiber sensory neuron (Sundt et al. 2015)",
- "repository_type": "github",
- "summary": "The effect of geometry and ionic mechanisms on spike propagation through the T-junction of an unmyelinated sensory neuron.",
- "tags": [
- {
- "id": 745,
- "tag": "Conduction failure"
- },
- {
- "id": 583,
- "tag": "I Calcium"
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- "id": 576,
- "tag": "I K"
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- "id": 581,
- "tag": "I K,Ca"
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- "id": 580,
- "tag": "I M"
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- "id": 584,
- "tag": "I Potassium"
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- "id": 582,
- "tag": "I Sodium"
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- "id": 564,
- "tag": "ModelDB"
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- "id": 2074,
- "tag": "ModelDB:187473"
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- "id": 740,
- "tag": "Na/K pump"
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- ],
- "timestamp_created": "2024-01-12 09:56:07.878372+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/187473",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
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- "name": "Layer V pyramidal cell model with reduced morphology (M\u00e4ki-Marttunen et al 2018)",
- "repository_type": "github",
- "summary": "\" ... In this work, we develop and apply an automated, stepwise method for fitting a neuron model to data with fine spatial resolution, such as that achievable with voltage sensitive dyes (VSDs) and Ca2+ imaging.\r\n...\r\nWe apply our method to simulated data from layer 5 pyramidal cells (L5PCs) and construct a model with reduced neuronal morphology. We connect the reduced-morphology neurons into a network and validate against simulated data from a high-resolution L5PC network model. ...\"",
- "tags": [
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 730,
- "tag": "I A, slow"
- },
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- "id": 583,
- "tag": "I Calcium"
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- "id": 581,
- "tag": "I K,Ca"
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- "id": 589,
- "tag": "I L high threshold"
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- "id": 580,
- "tag": "I M"
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- "id": 739,
- "tag": "I Na,p"
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- "id": 574,
- "tag": "I Na,t"
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- "id": 575,
- "tag": "I T low threshold"
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- "tag": "I h"
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- "tag": "ModelDB:187474"
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- "tag": "Python"
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- "timestamp_created": "2024-01-12 09:56:08.467012+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/187474",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
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- "id": 1502,
- "name": "An ion-based model for swelling of neurons and astrocytes (Hubel & Ullah 2016)",
- "repository_type": "github",
- "summary": "The programs describe ion dynamics and osmosis-driven cellular swelling. \u201ccode_fig3.ode\u201d shows a \r\nscenario of permanent cessation of energy supply / Na/K-pump activity, and the induced transition from \r\nnormal conditions to the Donnan equilibrium for an isolated neuron and its extracellular space. \r\n\r\n\u201ccode_Fig7.ode\u201d shows spreading depolarization induced by an interruption of energy supply in a model \r\nconsisting of a neuron, a glia cell and the extracellular space. The simulations show the evolution of ion\r\nconcentrations, Nernst potentials, the membrane potential, gating variables and cellular volumes.",
- "tags": [
- {
- "id": 1530,
- "tag": "Anoxic depolarization"
- },
- {
- "id": 873,
- "tag": "Depolarization block"
- },
- {
- "id": 765,
- "tag": "I Chloride"
- },
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- "id": 1531,
- "tag": "I Cl, leak"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 591,
- "tag": "I K,leak"
- },
- {
- "id": 1532,
- "tag": "I Na, leak"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 742,
- "tag": "I p,q"
- },
- {
- "id": 861,
- "tag": "I_K,Na"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2076,
- "tag": "ModelDB:187599"
- },
- {
- "id": 740,
- "tag": "Na/K pump"
- },
- {
- "id": 1626,
- "tag": "Osmosis-driven water flux"
- },
- {
- "id": 1899,
- "tag": "Spreading depression"
- },
- {
- "id": 1974,
- "tag": "Volume transmission"
- },
- {
- "id": 759,
- "tag": "XPPAUT"
- }
- ],
- "timestamp_created": "2024-01-12 09:56:10.113374+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/187599",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
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- "id": 1503,
- "name": "Hodgkin\u2013Huxley model with fractional gating (Teka et al. 2016)",
- "repository_type": "github",
- "summary": "We use fractional order derivatives to model the kinetic dynamics of the gate variables for the potassium and sodium conductances of the Hodgkin-Huxley model. Our results show that power-law dynamics of the different gate variables result\r\nin a wide range of action potential shapes and spiking patterns, even in the case where the model was stimulated with constant current. As a consequence, power-law behaving conductances result in an increase in the number of spiking patterns a neuron can generate and, we propose, expand the computational capacity of the neuron.",
- "tags": [
- {
- "id": 727,
- "tag": "Action Potential Initiation"
- },
- {
- "id": 736,
- "tag": "Action Potentials"
- },
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- "id": 566,
- "tag": "Bursting"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 591,
- "tag": "I K,leak"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 567,
- "tag": "Ion Channel Kinetics"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
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- "id": 767,
- "tag": "MATLAB (web link to model)"
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- "id": 564,
- "tag": "ModelDB"
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- "id": 2077,
- "tag": "ModelDB:187600"
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- {
- "id": 777,
- "tag": "Spike Frequency Adaptation"
- }
- ],
- "timestamp_created": "2024-01-12 09:56:10.668823+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/187600",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1504,
- "name": "Inhibition of bAPs and Ca2+ spikes in a multi-compartment pyramidal neuron model (Wilmes et al 2016)",
- "repository_type": "github",
- "summary": "\"Synaptic plasticity is thought to induce memory traces in the brain that are the foundation of learning. To ensure the stability of these traces in the presence of further learning, however, a regulation of plasticity appears beneficial. Here, we take up the recent suggestion that dendritic inhibition can switch plasticity of excitatory synapses on and off by gating backpropagating action potentials (bAPs) and calcium spikes, i.e., by gating the coincidence signals required for Hebbian forms of plasticity. We analyze temporal and spatial constraints of such a gating and investigate whether it is possible to suppress bAPs without a simultaneous annihilation of the forward-directed information flow via excitatory postsynaptic potentials (EPSPs). In a computational analysis of conductance-based multi-compartmental models, we demonstrate that a robust control of bAPs and calcium spikes is possible in an all-or-none manner, enabling a binary switch of coincidence signals and plasticity. ...\"",
- "tags": [
- {
- "id": 565,
- "tag": "Dendritic Action Potentials"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
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- "id": 2078,
- "tag": "ModelDB:187603"
- },
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- "id": 577,
- "tag": "NEURON"
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- "id": 620,
- "tag": "Python"
- },
- {
- "id": 596,
- "tag": "Synaptic Integration"
- },
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- "id": 725,
- "tag": "Synaptic Plasticity"
- }
- ],
- "timestamp_created": "2024-01-12 09:56:11.285173+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/187603",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "content_types": "modeling",
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- "modeling"
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- "default_context": "master",
- "id": 1505,
- "name": "Hippocampal CA1 NN with spontaneous theta, gamma: full scale & network clamp (Bezaire et al 2016)",
- "repository_type": "github",
- "summary": "This model is a full-scale, biologically constrained rodent hippocampal CA1 network model that includes 9 cells types (pyramidal cells and 8 interneurons) with realistic proportions of each and realistic connectivity between the cells. In addition, the model receives realistic numbers of afferents from artificial cells representing hippocampal CA3 and entorhinal cortical layer III. The model is fully scaleable and parallelized so that it can be run at small scale on a personal computer or large scale on a supercomputer. The model network exhibits spontaneous theta and gamma rhythms without any rhythmic input. The model network can be perturbed in a variety of ways to better study the mechanisms of CA1 network dynamics. Also see online code at http://bitbucket.org/mbezaire/ca1 and further information at http://mariannebezaire.com/models/ca1",
- "tags": [
- {
- "id": 855,
- "tag": "Connectivity matrix"
- },
- {
- "id": 1799,
- "tag": "Gamma oscillations"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 591,
- "tag": "I K,leak"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 856,
- "tag": "Laminar Connectivity"
- },
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- "id": 756,
- "tag": "Methods"
- },
- {
- "id": 564,
- "tag": "ModelDB"
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- {
- "id": 2079,
- "tag": "ModelDB:187604"
- },
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- "id": 577,
- "tag": "NEURON"
- },
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- "id": 743,
- "tag": "NEURON (web link to model)"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- }
- ],
- "timestamp_created": "2024-01-12 09:56:11.829037+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/187604",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1506,
- "name": "Endocannabinoid dynamics gate spike-timing dependent depression and potentiation (Cui et al 2016)",
- "repository_type": "github",
- "summary": "The endocannabinoid (eCB) system is considered involved in synaptic depression.\r\nRecent reports have also linked eCBs to synaptic potentiation. However it is not known how eCB signaling may support such bidirectionality. To question the mechanisms of this phenomena in spike-timing dependent plasticity (STDP) at corticostriatal synapses, we combined electrophysiology experiments with biophysical modeling. We demonstrate that STDP is controlled by eCB levels and dynamics: prolonged and moderate levels of eCB lead to eCB-mediated long-term depression (eCB-tLTD) while short and large eCB transients produce eCB-mediated long-term potentiation (eCB-tLTP). Therefore, just like neurotransmitters glutamate or GABA, eCB form a bidirectional system.",
- "tags": [
- {
- "id": 1684,
- "tag": "Ca pump"
- },
- {
- "id": 572,
- "tag": "Calcium dynamics"
- },
- {
- "id": 595,
- "tag": "Coincidence Detection"
- },
- {
- "id": 710,
- "tag": "FORTRAN"
- },
- {
- "id": 781,
- "tag": "G-protein coupled"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 1531,
- "tag": "I Cl, leak"
- },
- {
- "id": 589,
- "tag": "I L high threshold"
- },
- {
- "id": 818,
- "tag": "I_SERCA"
- },
- {
- "id": 567,
- "tag": "Ion Channel Kinetics"
- },
- {
- "id": 749,
- "tag": "Long-term Synaptic Plasticity"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2080,
- "tag": "ModelDB:187605"
- },
- {
- "id": 1744,
- "tag": "Neuromodulation"
- },
- {
- "id": 568,
- "tag": "Parameter Fitting"
- },
- {
- "id": 863,
- "tag": "Parameter sensitivity"
- },
- {
- "id": 620,
- "tag": "Python"
- },
- {
- "id": 802,
- "tag": "STDP"
- },
- {
- "id": 751,
- "tag": "Signaling pathways"
- },
- {
- "id": 725,
- "tag": "Synaptic Plasticity"
- }
- ],
- "timestamp_created": "2024-01-12 09:56:12.493601+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/187605",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1507": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1507,
- "name": "CA1 pyramidal neuron synaptic integration (Bloss et al. 2016)",
- "repository_type": "github",
- "summary": "\"... We examined synaptic connectivity\r\nbetween molecularly defined inhibitory interneurons\r\nand CA1 pyramidal cell dendrites using\r\ncorrelative light-electron microscopy and large-volume\r\narray tomography. We show that interneurons\r\ncan be highly selective in their connectivity to specific\r\ndendritic branch types and, furthermore,\r\nexhibit precisely targeted connectivity to the origin\r\nor end of individual branches. Computational simulations\r\nindicate that the observed subcellular\r\ntargeting enables control over the nonlinear integration\r\nof synaptic input or the initiation and\r\nbackpropagation of action potentials in a branchselective\r\nmanner. Our results demonstrate that\r\nconnectivity between interneurons and pyramidal\r\ncell dendrites is more precise and spatially segregated\r\nthan previously appreciated, which may be\r\na critical determinant of how inhibition shapes dendritic\r\ncomputation.\"",
- "tags": [
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2081,
- "tag": "ModelDB:187610"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 596,
- "tag": "Synaptic Integration"
- }
- ],
- "timestamp_created": "2024-01-12 09:56:13.135343+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/187610",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1508": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1508,
- "name": "Pleiotropic effects of SCZ-associated genes (M\u00e4ki-Marttunen et al. 2017)",
- "repository_type": "github",
- "summary": "Python and MATLAB scripts for studying the dual effects of SCZ-related genes on layer 5 pyramidal cell firing and sinoatrial node cell pacemaking properties. The study is based on two L5PC models (Hay et al. 2011, Almog & Korngreen 2014) and SANC models (Kharche et al. 2011, Severi et al. 2012).",
- "tags": [
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 730,
- "tag": "I A, slow"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 589,
- "tag": "I L high threshold"
- },
- {
- "id": 580,
- "tag": "I M"
- },
- {
- "id": 739,
- "tag": "I Na,p"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 575,
- "tag": "I T low threshold"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 818,
- "tag": "I_SERCA"
- },
- {
- "id": 1931,
- "tag": "Kir"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2082,
- "tag": "ModelDB:187615"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 738,
- "tag": "Na/Ca exchanger"
- },
- {
- "id": 740,
- "tag": "Na/K pump"
- },
- {
- "id": 620,
- "tag": "Python"
- },
- {
- "id": 845,
- "tag": "Schizophrenia"
- }
- ],
- "timestamp_created": "2024-01-12 09:56:13.672805+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/187615",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1509": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1509,
- "name": "Axon growth model (Diehl et al. 2016)",
- "repository_type": "github",
- "summary": "The model describes the elongation over time of an axon from a small neurite to its steady-state length. The elongation depends on the availability of tubulin dimers in the growth cone. The dimers are produced in the soma and then transported along the axon to the growth cone.\r\n\r\nMathematically the model consists of a partial differential equation coupled with two nonlinear ordinary differential equations. \r\n\r\nThe code implements a spatial scaling to deal with the growing (and shrinking) domain and a temporal scaling to deal with evolutions on different time scales. Further, the numerical scheme is chosen to fully utilize the structure of the problems. To summarize, this results in fast and reliable axon growth simulations.",
- "tags": [
- {
- "id": 793,
- "tag": "Development"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2083,
- "tag": "ModelDB:187687"
- },
- {
- "id": 863,
- "tag": "Parameter sensitivity"
- }
- ],
- "timestamp_created": "2024-01-12 09:56:14.209030+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/187687",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
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- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1510,
- "name": "Microsaccades and synchrony coding in the retina (Masquelier et al. 2016)",
- "repository_type": "github",
- "summary": "We show that microsaccades (MS) enable efficient synchrony-based coding among the primate retinal ganglion cells (RGC). We find that each MS causes certain RGCs to fire synchronously, namely those whose receptive fields contain contrast edges after the MS. The emitted synchronous spike volley thus rapidly transmits the most salient edges of the stimulus. We demonstrate that the readout could be done rapidly by simple coincidence-detector neurons, and that the required connectivity could emerge spontaneously with spike timing-dependent plasticity.",
- "tags": [
- {
- "id": 755,
- "tag": "C or Cplusplus program"
- },
- {
- "id": 595,
- "tag": "Coincidence Detection"
- },
- {
- "id": 1478,
- "tag": "Information transfer"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2084,
- "tag": "ModelDB:188423"
- },
- {
- "id": 719,
- "tag": "Pattern Recognition"
- },
- {
- "id": 802,
- "tag": "STDP"
- },
- {
- "id": 821,
- "tag": "Sensory coding"
- },
- {
- "id": 758,
- "tag": "Sensory processing"
- },
- {
- "id": 587,
- "tag": "Spatio-temporal Activity Patterns"
- },
- {
- "id": 586,
- "tag": "Synchronization"
- }
- ],
- "timestamp_created": "2024-01-12 09:56:14.740791+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/188423",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1511": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 1511,
- "name": "The neocortical microcircuit collaboration portal (Markram et al. 2015)",
- "repository_type": "github",
- "summary": "\"This portal provides an online public resource of the Blue Brain Project's first release of a digital reconstruction of the microcircuitry of juvenile Rat somatosensory cortex, access to experimental data sets used in the reconstruction, and the resulting models.\"",
- "tags": [
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2085,
- "tag": "ModelDB:188543"
- },
- {
- "id": 743,
- "tag": "NEURON (web link to model)"
- },
- {
- "id": 848,
- "tag": "NeuroML (web link to model)"
- },
- {
- "id": 587,
- "tag": "Spatio-temporal Activity Patterns"
- }
- ],
- "timestamp_created": "2024-01-12 09:56:15.290563+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/188543",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1512": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1512,
- "name": "Parallelizing large networks in NEURON (Lytton et al. 2016)",
- "repository_type": "github",
- "summary": "\"Large multiscale neuronal network simulations and\r\ninnovative neurotechnologies are required for development of these models requires\r\ndevelopment of new simulation technologies.\r\n\r\nWe describe here the current use of\r\nthe NEURON simulator with MPI (message passing interface) for simulation in\r\nthe domain of moderately large networks on commonly available High\r\nPerformance Computers (HPCs).\r\n\r\nWe discuss the\r\nbasic layout of such simulations, including the methods of simulation setup, the\r\nrun-time spike passing paradigm and post-simulation data storage and data\r\nmanagement approaches.\r\n\r\nWe also compare three types of\r\nnetworks, ...\"\r\n",
- "tags": [
- {
- "id": 756,
- "tag": "Methods"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2086,
- "tag": "ModelDB:188544"
- },
- {
- "id": 866,
- "tag": "Multiscale"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 659,
- "tag": "NetPyNE"
- },
- {
- "id": 569,
- "tag": "Simplified Models"
- }
- ],
- "timestamp_created": "2024-01-12 09:56:15.867709+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/188544",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1513": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 1513,
- "name": "Multiscale modeling of epileptic seizures (Naze et al. 2015)",
- "repository_type": "github",
- "summary": "\" ... In the context of epilepsy, the functional properties of the network at the source of a seizure are disrupted by a possibly large set of factors at the cellular and molecular levels. It is therefore needed to sacrifice some biological accuracy to model seizure dynamics in favor of macroscopic realizations. Here, we present a neuronal network model that convenes both neuronal and network representations with the goal to describe brain dynamics involved in the development of epilepsy. We compare our modeling results with animal in vivo recordings to validate our approach in the context of seizures. ...\"",
- "tags": [
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 566,
- "tag": "Bursting"
- },
- {
- "id": 469,
- "tag": "Epilepsy"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2087,
- "tag": "ModelDB:188552"
- },
- {
- "id": 866,
- "tag": "Multiscale"
- },
- {
- "id": 853,
- "tag": "Python (web link to model)"
- }
- ],
- "timestamp_created": "2024-01-12 09:56:16.372466+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/188552",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1514": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1514,
- "name": "CA1 pyramidal cells, basket cells, ripples (Malerba et al 2016)",
- "repository_type": "github",
- "summary": "Model of CA1 pyramidal layer Ripple activity, triggered when receiving current input (to represent CA3 sharp-waves). \r\nCells are Adaptive-Exponential Integrate and Fire neurons, receiving independent OU noise.",
- "tags": [
- {
- "id": 1527,
- "tag": "Brain Rhythms"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2088,
- "tag": "ModelDB:188977"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 592,
- "tag": "Sleep"
- }
- ],
- "timestamp_created": "2024-01-12 09:56:16.878940+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/188977",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1515": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1515,
- "name": "Fully continuous Pinsky-Rinzel model for bifurcation analysis (Atherton et al. 2016)",
- "repository_type": "github",
- "summary": "The original, 2-compartment, CA3 cell, Pinsky-Rinzel model (Pinsky, Rinzel 1994) has several discontinuous functions that prevent the use of standard bifurcation analysis tools to study the model. Here we present a modified, fully continuous system that captures the behaviour of the original model, while permitting the use of available numerical continuation software to perform full-system bifurcation and fast-slow analysis in XPPAUT.",
- "tags": [
- {
- "id": 804,
- "tag": "Bifurcation"
- },
- {
- "id": 566,
- "tag": "Bursting"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2089,
- "tag": "ModelDB:189088"
- },
- {
- "id": 620,
- "tag": "Python"
- },
- {
- "id": 830,
- "tag": "XPP (web link to model)"
- },
- {
- "id": 759,
- "tag": "XPPAUT"
- }
- ],
- "timestamp_created": "2024-01-12 09:56:17.367621+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/189088",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1516": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1516,
- "name": "Striatal Spiny Projection Neuron (SPN) plasticity rule (Jedrzejewska-Szmek et al 2016)",
- "repository_type": "github",
- "summary": "Striatal Spiny Projection Neuron (SPN) plasticity rule (Jedrzejewska-Szmek et al 2016)",
- "tags": [
- {
- "id": 572,
- "tag": "Calcium dynamics"
- },
- {
- "id": 600,
- "tag": "GENESIS"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2090,
- "tag": "ModelDB:189153"
- },
- {
- "id": 725,
- "tag": "Synaptic Plasticity"
- }
- ],
- "timestamp_created": "2024-01-12 09:56:17.857034+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/189153",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1517": {
- "auto_sync": true,
- "content_types": "modeling",
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- "modeling"
- ],
- "default_context": "master",
- "id": 1517,
- "name": "Multitarget pharmacology for Dystonia in M1 (Neymotin et al 2016)",
- "repository_type": "github",
- "summary": "\" ... We developed a multiscale model of primary motor cortex, ranging from molecular, up to cellular, and network levels, containing 1715 compartmental model neurons with multiple ion channels and intracellular molecular dynamics. We wired the model based on electrophysiological data obtained from mouse motor cortex circuit mapping experiments. We used the model to reproduce patterns of heightened activity seen in dystonia by applying independent random variations in parameters to identify pathological parameter sets. ...\"",
- "tags": [
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 2042,
- "tag": "Beta oscillations"
- },
- {
- "id": 1684,
- "tag": "Ca pump"
- },
- {
- "id": 572,
- "tag": "Calcium dynamics"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 589,
- "tag": "I L high threshold"
- },
- {
- "id": 580,
- "tag": "I M"
- },
- {
- "id": 721,
- "tag": "I N"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 575,
- "tag": "I T low threshold"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 747,
- "tag": "I_KD"
- },
- {
- "id": 818,
- "tag": "I_SERCA"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2091,
- "tag": "ModelDB:189154"
- },
- {
- "id": 866,
- "tag": "Multiscale"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 787,
- "tag": "Pathophysiology"
- },
- {
- "id": 620,
- "tag": "Python"
- },
- {
- "id": 1919,
- "tag": "Reaction-diffusion"
- }
- ],
- "timestamp_created": "2024-01-12 09:56:18.421657+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/189154",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1518": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1518,
- "name": "Axonal HH-model for temperature stimulation (Fribance et al 2016)",
- "repository_type": "github",
- "summary": "\"... To analyze the temperature effect, our study modified\r\nthe classical HH axonal model by incorporating a membrane\r\ncapacitance-temperature relationship. The modified model\r\nsuccessfully simulated the generation and propagation of action\r\npotentials induced by a rapid increase in local temperature\r\nwhen the Curie temperature of membrane capacitance is below\r\n40 \u00b0C, while the classical model failed to simulate the\r\naxonal excitation by temperature stimulation. The new model\r\npredicts that a rapid increase in local temperature produces a\r\nrapid increase in membrane capacitance, which causes an inward\r\nmembrane current across the membrane capacitor strong\r\nenough to depolarize the membrane and generate an action\r\npotential. ...\"",
- "tags": [
- {
- "id": 727,
- "tag": "Action Potential Initiation"
- },
- {
- "id": 861,
- "tag": "I_K,Na"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2092,
- "tag": "ModelDB:189155"
- }
- ],
- "timestamp_created": "2024-01-12 09:56:19.159009+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/189155",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1519": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1519,
- "name": "A detailed data-driven network model of prefrontal cortex (Hass et al 2016)",
- "repository_type": "github",
- "summary": "Data-based PFC-like circuit with layer 2/3 and 5, synaptic clustering, four types of interneurons and cell-type specific short-term synaptic plasticity; neuron parameters fitted to in vitro data, all other parameters constrained by experimental literature. Reproduces key features of in vivo resting state activity without specific tuning.",
- "tags": [
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 755,
- "tag": "C or Cplusplus program"
- },
- {
- "id": 856,
- "tag": "Laminar Connectivity"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 756,
- "tag": "Methods"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2093,
- "tag": "ModelDB:189160"
- }
- ],
- "timestamp_created": "2024-01-12 09:56:19.716600+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/189160",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1520": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1520,
- "name": "Functional properties of dendritic gap junctions in Cerebellar Golgi cells (Szoboszlay et al. 2016)",
- "repository_type": "github",
- "summary": "\" ... We investigated the properties of gap junctions\r\nin cerebellar interneurons by combining paired\r\nsomato-somatic and somato-dendritic recordings,\r\nanatomical reconstructions, immunohistochemistry,\r\nelectron microscopy, and modeling. By fitting\r\ndetailed compartmental models of Golgi cells to\r\ntheir somato-dendritic voltage responses, we determined\r\ntheir passive electrical properties and the\r\nmean gap junction conductance (0.9 nS). ...\"",
- "tags": [
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2094,
- "tag": "ModelDB:189186"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 542,
- "tag": "neuroConstruct"
- }
- ],
- "timestamp_created": "2024-01-12 09:56:20.361208+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/189186",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1521": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1521,
- "name": "Goldfish Mauthner cell (Medan et al 2017)",
- "repository_type": "github",
- "summary": "\" ...In fish, evasion of a diving bird that breaks the water surface depends on integrating visual and auditory stimuli with very different characteristics. How do neurons process such differential sensory inputs at the dendritic level? For that we studied the Mauthner-cells (M-cells) in the goldfish startle circuit, which receive visual and auditory inputs via two separate dendrites, both accessible for in vivo recordings. We asked if electrophysiological membrane properties and dendrite morphology, studied in vivo, play a role in selective sensory processing in the M-cell. Our results show that anatomical and electrophysiological differences between the dendrites combine to produce stronger attenuation of visually evoked post synaptic potentials (PSPs) than to auditory evoked PSPs. Interestingly, our recordings showed also cross-modal dendritic interaction, as auditory evoked PSPs invade the ventral dendrite (VD) as well as the opposite, visual PSPs invade the lateral dendrite (LD). However, these interactions were asymmetrical with auditory PSPs being more prominent in the VD than visual PSPs in the LD. Modelling experiments imply that this asymmetry is caused by active conductances expressed in the proximal segments of the VD. ...\"",
- "tags": [
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2095,
- "tag": "ModelDB:189308"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 620,
- "tag": "Python"
- },
- {
- "id": 758,
- "tag": "Sensory processing"
- }
- ],
- "timestamp_created": "2024-01-12 09:56:21.088013+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/189308",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1522": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1522,
- "name": "A mathematical model of evoked calcium dynamics in astrocytes (Handy et al 2017)",
- "repository_type": "github",
- "summary": "\" ...Here we present a qualitative analysis of a recent mathematical model of astrocyte calcium responses. We show how the major response types are generated in the model as a result of the underlying bifurcation structure. By varying key channel parameters, mimicking blockers used by experimentalists, we manipulate this underlying bifurcation structure and predict how the distributions of responses can change. We find that store-operated calcium channels, plasma membrane bound channels with little activity during calcium transients, have a surprisingly strong effect, underscoring the importance of considering these channels in both experiments and mathematical settings. ...\"",
- "tags": [
- {
- "id": 804,
- "tag": "Bifurcation"
- },
- {
- "id": 1684,
- "tag": "Ca pump"
- },
- {
- "id": 572,
- "tag": "Calcium dynamics"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 818,
- "tag": "I_SERCA"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2096,
- "tag": "ModelDB:189344"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 759,
- "tag": "XPPAUT"
- }
- ],
- "timestamp_created": "2024-01-12 09:56:21.802761+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/189344",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "1523": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1523,
- "name": "Modeling epileptic seizure induced by depolarization block (Kim & Dykamp 2017)",
- "repository_type": "github",
- "summary": "\"The inhibitory restraint necessary to suppress\r\naberrant activity can fail when inhibitory neurons cease to\r\ngenerate action potentials as they enter depolarization block.\r\nWe investigate possible bifurcation structures that arise at\r\nthe onset of seizure-like activity resulting from depolarization\r\nblock in inhibitory neurons. Networks of conductance based\r\nexcitatory and inhibitory neurons are simulated to\r\ncharacterize different types of transitions to the seizure\r\nstate, and a mean field model is developed to verify the generality\r\nof the observed phenomena of excitatory-inhibitory\r\ndynamics. ...\"\r\n",
- "tags": [
- {
- "id": 645,
- "tag": "Brian"
- },
- {
- "id": 873,
- "tag": "Depolarization block"
- },
- {
- "id": 469,
- "tag": "Epilepsy"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2097,
- "tag": "ModelDB:189346"
- }
- ],
- "timestamp_created": "2024-01-12 09:56:22.471663+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/189346",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1524": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1524,
- "name": "Multiplication by NMDA receptors in Direction Selective Ganglion cells (Poleg-Polsky & Diamond 2016)",
- "repository_type": "github",
- "summary": "The model demonstrates how signal amplification with NMDARs depends on the synaptic environment. When direction selectivity (DS) detection is mediated by DS inhibition, NMDARs multiply other synaptic conductances. In the case of DS tuned excitation, NMDARs contribute additively.",
- "tags": [
- {
- "id": 860,
- "tag": "Direction Selectivity"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2098,
- "tag": "ModelDB:189347"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 596,
- "tag": "Synaptic Integration"
- },
- {
- "id": 726,
- "tag": "Vision"
- }
- ],
- "timestamp_created": "2024-01-12 09:56:22.967963+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/189347",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1525": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1525,
- "name": "Muscle spindle feedback circuit (Moraud et al, 2016)",
- "repository_type": "github",
- "summary": "Here, we developed a computational model of the muscle spindle feedback circuits of the rat ankle that predicts the interactions between Epidural Stimulation and spinal circuit dynamics during gait.",
- "tags": [
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 739,
- "tag": "I Na,p"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2099,
- "tag": "ModelDB:189786"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 1744,
- "tag": "Neuromodulation"
- },
- {
- "id": 620,
- "tag": "Python"
- },
- {
- "id": 758,
- "tag": "Sensory processing"
- }
- ],
- "timestamp_created": "2024-01-12 09:56:23.482122+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/189786",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
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- "content_types": "modeling",
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- "modeling"
- ],
- "default_context": "master",
- "id": 1526,
- "name": "Model of Type 3 firing in neurons (Clay et al 2008)",
- "repository_type": "github",
- "summary": "An ionic model for Type 3 firing in neurons (Clay et al 2008)\r\n\r\nSome neurons fire only once in response to a sustained depolarizing current pulse, type 3 behavior. One example, surprisingly, is the squid giant axon. The Hodgkin-Huxley (HH) model of this preparation fires repetitively for these conditions \u2013 type 2, a result that is not observed experimentally as shown in the above paper. Changing one parameter of their model of IK is sufficient to mimic the result.",
- "tags": [
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2100,
- "tag": "ModelDB:189922"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 620,
- "tag": "Python"
- }
- ],
- "timestamp_created": "2024-01-12 09:56:23.984038+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/189922",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1527": {
- "auto_sync": true,
- "content_types": "modeling",
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- "modeling"
- ],
- "default_context": "master",
- "id": 1527,
- "name": "Macroscopic model of epilepsy (Fietkiewicz & Loparo 2016)",
- "repository_type": "github",
- "summary": "Simulates epileptiform EEG. Original model used for Figure 2 in Fietkiewicz and Loparo 2016. The MATLAB program uses Euler integration to create the basic plot in Figure 2. The model is based on the original model specified in Wendling F, Bartolomei F, Bellanger JJ, Chauvel P. Epileptic fast activity can be explained by a model of impaired GABAergic dendritic inhibition. Eur J Neurosci, 2002;15(9):1499-1508.",
- "tags": [
- {
- "id": 469,
- "tag": "Epilepsy"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2101,
- "tag": "ModelDB:189946"
- }
- ],
- "timestamp_created": "2024-01-12 09:56:24.498125+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/189946",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1528": {
- "auto_sync": true,
- "content_types": "modeling",
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- "modeling"
- ],
- "default_context": "master",
- "id": 1528,
- "name": "Modeling single neuron LFPs and extracellular potentials with LFPsim (Parasuram et al. 2016)",
- "repository_type": "github",
- "summary": "LFPsim - Simulation scripts to compute Local Field Potentials (LFP) from cable compartmental models of neurons and networks implemented in the NEURON simulation environment.",
- "tags": [
- {
- "id": 734,
- "tag": "Extracellular Fields"
- },
- {
- "id": 756,
- "tag": "Methods"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2102,
- "tag": "ModelDB:190140"
- },
- {
- "id": 577,
- "tag": "NEURON"
- }
- ],
- "timestamp_created": "2024-01-12 09:56:25.039510+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/190140",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1529": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1529,
- "name": "Dorsal root ganglion (primary somatosensory) neurons (Rho & Prescott 2012)",
- "repository_type": "github",
- "summary": "In this paper, we demonstrate how dorsal root ganglion (DRG) neuron excitability can become pathologically altered, as occurs in neuropathic pain. Specifically, we reproduce pathological changes in spiking pattern (from transient to repetitive spiking) and the development of membrane potential oscillations and bursting.",
- "tags": [
- {
- "id": 727,
- "tag": "Action Potential Initiation"
- },
- {
- "id": 804,
- "tag": "Bifurcation"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2103,
- "tag": "ModelDB:190261"
- },
- {
- "id": 775,
- "tag": "Nociception"
- },
- {
- "id": 759,
- "tag": "XPPAUT"
- }
- ],
- "timestamp_created": "2024-01-12 09:56:25.544422+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/190261",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1530": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1530,
- "name": "Signaling pathways underlying LTP in hippocampal CA1 pyramidal cells (Jedrzejewska-Szmek et al 2017)",
- "repository_type": "github",
- "summary": "\" ...We investigated whether the diverse experimental evidence can be unified by creating a spatial, mechanistic model of multiple signaling pathways in hippocampal CA1 neurons. Our results show that the combination of activity of several key kinases can predict the occurrence of long-lasting forms of LTP for multiple experimental protocols. ...\"",
- "tags": [
- {
- "id": 749,
- "tag": "Long-term Synaptic Plasticity"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2104,
- "tag": "ModelDB:190304"
- },
- {
- "id": 1542,
- "tag": "NeuroRD"
- },
- {
- "id": 751,
- "tag": "Signaling pathways"
- }
- ],
- "timestamp_created": "2024-01-12 09:56:26.099545+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/190304",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1531": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1531,
- "name": "Inhibition and glial-K+ interaction leads to diverse seizure transition modes (Ho & Truccolo 2016)",
- "repository_type": "github",
- "summary": "\"How focal seizures initiate and evolve in human neocortex remains a fundamental problem in neuroscience. Here, we use biophysical neuronal network models of neocortical patches to study how the interaction between inhibition and extracellular potassium ([K+]o) dynamics may contribute to different types of focal seizures. Three main types of propagated focal seizures observed in recent intracortical microelectrode recordings in humans were modelled ...\"",
- "tags": [
- {
- "id": 566,
- "tag": "Bursting"
- },
- {
- "id": 755,
- "tag": "C or Cplusplus program"
- },
- {
- "id": 754,
- "tag": "Delay"
- },
- {
- "id": 469,
- "tag": "Epilepsy"
- },
- {
- "id": 1799,
- "tag": "Gamma oscillations"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 1433,
- "tag": "I_AHP"
- },
- {
- "id": 567,
- "tag": "Ion Channel Kinetics"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2105,
- "tag": "ModelDB:190306"
- },
- {
- "id": 1808,
- "tag": "Potassium buffering"
- }
- ],
- "timestamp_created": "2024-01-12 09:56:26.601478+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/190306",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1532": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1532,
- "name": "Spatial structure from diffusive synaptic plasticity (Sweeney and Clopath, 2016)",
- "repository_type": "github",
- "summary": "In this paper we propose a new form of Hebbian synaptic plasticity which is mediated by a diffusive neurotransmitter. The effects of this diffusive plasticity are implemented in networks of rate-based neurons, and lead to the emergence of spatial structure in the synaptic connectivity of the network.",
- "tags": [
- {
- "id": 808,
- "tag": "Hebbian plasticity"
- },
- {
- "id": 749,
- "tag": "Long-term Synaptic Plasticity"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2106,
- "tag": "ModelDB:190311"
- },
- {
- "id": 620,
- "tag": "Python"
- },
- {
- "id": 1974,
- "tag": "Volume transmission"
- }
- ],
- "timestamp_created": "2024-01-12 09:56:27.116241+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/190311",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
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- "auto_sync": true,
- "content_types": "modeling",
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- "modeling"
- ],
- "default_context": "master",
- "id": 1533,
- "name": "Effects of electric fields on cognitive functions (Migliore et al 2016)",
- "repository_type": "github",
- "summary": "The paper discusses the effects induced by an electric field at power lines frequency on neuronal activity during cognitive processes.",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 565,
- "tag": "Dendritic Action Potentials"
- },
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 734,
- "tag": "Extracellular Fields"
- },
- {
- "id": 1799,
- "tag": "Gamma oscillations"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2107,
- "tag": "ModelDB:190559"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 719,
- "tag": "Pattern Recognition"
- },
- {
- "id": 587,
- "tag": "Spatio-temporal Activity Patterns"
- },
- {
- "id": 596,
- "tag": "Synaptic Integration"
- }
- ],
- "timestamp_created": "2024-01-12 09:56:27.633527+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/190559",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1534": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1534,
- "name": "Supervised learning in spiking neural networks with FORCE training (Nicola & Clopath 2017)",
- "repository_type": "github",
- "summary": "The code contained in the zip file runs FORCE training for various examples from the paper:\r\n\r\nFigure 2 (Oscillators and Chaotic Attractor)\r\nFigure 3 (Ode to Joy) \r\nFigure 4 (Song Bird Example)\r\nFigure 5 (Movie Example) \r\n\r\nSupplementary Figures 10-12 (Classifier)\r\nSupplementary Ode to Joy Example \r\nSupplementary Figure 2 (Oscillator Panel) \r\nSupplementary Figure 17 (Long Ode to Joy) \r\n\r\nNote that due to file size limitations, the supervisors for Figures 4/5 are not included. \r\n\r\nSee \r\nNicola, W., & Clopath, C. (2016). Supervised Learning in Spiking Neural Networks with FORCE Training. arXiv preprint arXiv:1609.02545.\r\nfor further details. \r\n ",
- "tags": [
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2108,
- "tag": "ModelDB:190565"
- }
- ],
- "timestamp_created": "2024-01-12 09:56:28.172176+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/190565",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1535": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
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- ],
- "default_context": "main",
- "id": 1535,
- "name": "Theory of sequence memory in neocortex (Hawkins & Ahmad 2016)",
- "repository_type": "github",
- "summary": "\"... First we show that a neuron with several thousand synapses segregated on active dendrites can recognize hundreds of independent patterns of cellular activity even in the presence of large amounts of noise and pattern variation. We then propose a neuron model where patterns detected on proximal dendrites lead to action potentials, defining the classic receptive field of the neuron, and patterns detected on basal and apical dendrites act as predictions by slightly depolarizing the neuron without generating an action potential. By this mechanism, a neuron can predict its activation in hundreds of independent contexts. We then present a network model based on neurons with these properties that learns time-based sequences. ...\"",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 579,
- "tag": "Active Dendrites"
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- "id": 564,
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- },
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- "id": 2109,
- "tag": "ModelDB:190610"
- },
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- "id": 853,
- "tag": "Python (web link to model)"
- },
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- "id": 569,
- "tag": "Simplified Models"
- }
- ],
- "timestamp_created": "2024-01-12 09:56:28.683802+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/190610",
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- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "modeling"
- ],
- "default_context": "master",
- "id": 1536,
- "name": "Grid cell model with compression effects (Raudies & Hasselmo, 2015)",
- "repository_type": "github",
- "summary": "We present a model for compression of grid cell firing in modules to changes in barrier location.",
- "tags": [
- {
- "id": 1461,
- "tag": "Grid cell"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2110,
- "tag": "ModelDB:194881"
- }
- ],
- "timestamp_created": "2024-01-12 09:56:29.268234+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/194881",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
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- "auto_sync": true,
- "content_types": "modeling",
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- "modeling"
- ],
- "default_context": "master",
- "id": 1537,
- "name": "Hippocampal spiking model for context dependent behavior (Raudies & Hasselmo 2014)",
- "repository_type": "github",
- "summary": "Our model simulates the effect of context dependent behavior using discrete inputs to drive spiking activity representing place and item followed sequentially by a discrete representation of the motor actions involving a response to an item (digging for food) or the movement to a different item (movement to a different pot for food). This simple network was able to consistently learn the context-dependent responses.",
- "tags": [
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2111,
- "tag": "ModelDB:194882"
- }
- ],
- "timestamp_created": "2024-01-12 09:56:29.749705+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/194882",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1538": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1538,
- "name": "Deep belief network learns context dependent behavior (Raudies, Zilli, Hasselmo 2014)",
- "repository_type": "github",
- "summary": "We tested a rule generalization capability with a Deep Belief Network (DBN), Multi-Layer Perceptron network, and the combination of a DBN with a linear perceptron (LP). Overall, the combination of the DBN and LP had the highest success rate for generalization.",
- "tags": [
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2112,
- "tag": "ModelDB:194883"
- }
- ],
- "timestamp_created": "2024-01-12 09:56:30.239965+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/194883",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1539,
- "name": "Motor system model with reinforcement learning drives virtual arm (Dura-Bernal et al 2017)",
- "repository_type": "github",
- "summary": "\"We implemented a model of the motor system with the following components: dorsal premotor cortex (PMd), primary motor cortex (M1), spinal cord and musculoskeletal arm (Figure 1). PMd modulated M1 to select the target to reach, M1 excited the descending spinal cord neurons that drove the arm muscles, and received arm proprioceptive feedback (information about the arm position) via the ascending spinal cord neurons. \r\nThe large-scale model of M1 consisted of 6,208 spiking Izhikevich model neurons [37] of four types: regular-firing and bursting pyramidal neurons, and fast-spiking and low-threshold-spiking interneurons. These were distributed across cortical layers 2/3, 5A, 5B and 6, with cell properties, proportions, locations, connectivity, weights and delays drawn primarily from mammalian experimental data [38], [39], and described in detail in previous work [29]. The network included 486,491 connections, with synapses modeling properties of four different receptors ...\"",
- "tags": [
- {
- "id": 825,
- "tag": "Learning"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2113,
- "tag": "ModelDB:194897"
- },
- {
- "id": 1966,
- "tag": "Motor control"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 620,
- "tag": "Python"
- },
- {
- "id": 809,
- "tag": "Reinforcement Learning"
- },
- {
- "id": 859,
- "tag": "Reward-modulated STDP"
- },
- {
- "id": 802,
- "tag": "STDP"
- },
- {
- "id": 758,
- "tag": "Sensory processing"
- }
- ],
- "timestamp_created": "2024-01-12 09:56:30.750704+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/194897",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1540": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1540,
- "name": "Stochastic and periodic inputs tune ongoing oscillations (Hutt et al. 2016)",
- "repository_type": "github",
- "summary": "\" ... We here analyze a network of recurrently connected spiking neurons with time delay displaying stable synchronous dynamics. Using mean-field and stability analyses, we investigate the influence of dynamic inputs on the frequency of firing rate oscillations. ...\"",
- "tags": [
- {
- "id": 755,
- "tag": "C or Cplusplus program"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2114,
- "tag": "ModelDB:195206"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- }
- ],
- "timestamp_created": "2024-01-12 09:56:31.242667+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/195206",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1541": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1541,
- "name": "Automated metadata suggester (McDougal et al 2018)",
- "repository_type": "github",
- "summary": "This code provides an abstract processing method that predicts keywords for model entries in ModelDB.",
- "tags": [
- {
- "id": 756,
- "tag": "Methods"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2115,
- "tag": "ModelDB:195555"
- },
- {
- "id": 620,
- "tag": "Python"
- }
- ],
- "timestamp_created": "2024-01-12 09:56:31.753893+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/195555",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1542": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1542,
- "name": "Concentration dependent nonlinear K+ and Cl- leak current (Huang et al. 2015)",
- "repository_type": "github",
- "summary": "\"In their seminal works on squid giant axons, Hodgkin, and Huxley\r\napproximated the membrane leak current as Ohmic, i.e., linear, since\r\nin their preparation, sub-threshold current rectification due to the\r\ninfluence of ionic concentration is negligible.\r\n\r\nMost studies on\r\nmammalian neurons have made the same, largely untested,\r\nassumption. \r\n\r\nHere we show that the membrane time constant and input\r\nresistance of mammalian neurons (when other major voltage-sensitive\r\nand ligand-gated ionic currents are discounted) varies non-linearly\r\nwith membrane voltage, following the prediction of a\r\nGoldman-Hodgkin-Katz-based passive membrane model.\r\n...\" (see paper for details and more).\r\n",
- "tags": [
- {
- "id": 1531,
- "tag": "I Cl, leak"
- },
- {
- "id": 591,
- "tag": "I K,leak"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2116,
- "tag": "ModelDB:195569"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 620,
- "tag": "Python"
- }
- ],
- "timestamp_created": "2024-01-12 09:56:32.240752+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/195569",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1543": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1543,
- "name": "Computer models of corticospinal neurons replicate in vitro dynamics (Neymotin et al. 2017)",
- "repository_type": "github",
- "summary": "\"Corticospinal neurons (SPI), thick-tufted pyramidal neurons in motor\r\ncortex layer 5B that project caudally via the medullary pyramids,\r\ndisplay distinct class-specific electrophysiological properties in\r\nvitro: strong sag with hyperpolarization, lack of adaptation, and a\r\nnearly linear frequency-current (FI) relationship. We used our\r\nelectrophysiological data to produce a pair of large archives of SPI\r\nneuron computer models in two model classes: 1. Detailed models with\r\nfull reconstruction; 2. Simplified models with 6 compartments. We\r\nused a PRAXIS and an evolutionary multiobjective optimization (EMO) in\r\nsequence to determine ion channel conductances. \r\n...\"",
- "tags": [
- {
- "id": 579,
- "tag": "Active Dendrites"
- },
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 1684,
- "tag": "Ca pump"
- },
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 589,
- "tag": "I L high threshold"
- },
- {
- "id": 721,
- "tag": "I N"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 747,
- "tag": "I_KD"
- },
- {
- "id": 1931,
- "tag": "Kir"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2117,
- "tag": "ModelDB:195615"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 568,
- "tag": "Parameter Fitting"
- },
- {
- "id": 620,
- "tag": "Python"
- },
- {
- "id": 569,
- "tag": "Simplified Models"
- }
- ],
- "timestamp_created": "2024-01-12 09:56:32.777766+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/195615",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1544": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 1544,
- "name": "ModFossa: a library for modeling ion channels using Python (Ferneyhough et al 2016)",
- "repository_type": "github",
- "summary": "ModFossa: a library for modeling ion channels using Python (Ferneyhough et al 2016)",
- "tags": [
- {
- "id": 567,
- "tag": "Ion Channel Kinetics"
- },
- {
- "id": 756,
- "tag": "Methods"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2118,
- "tag": "ModelDB:195626"
- },
- {
- "id": 853,
- "tag": "Python (web link to model)"
- }
- ],
- "timestamp_created": "2024-01-12 09:56:33.296997+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/195626",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1545": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1545,
- "name": "Models of visual topographic map alignment in the Superior Colliculus (Tikidji-Hamburyan et al 2016)",
- "repository_type": "github",
- "summary": "We develop two novel computational models of\r\nvisual map alignment in the SC that incorporate distinct activity-dependent\r\ncomponents. First, a Correlational Model assumes that V1 inputs achieve alignment\r\nwith established retinal inputs through simple correlative firing mechanisms. A second\r\nIntegrational Model assumes that V1 inputs contribute to the firing of SC neurons\r\nduring alignment. Both models accurately replicate in vivo findings in wild type,\r\ntransgenic and combination mutant mouse models, suggesting either activity-dependent\r\nmechanism is plausible.",
- "tags": [
- {
- "id": 855,
- "tag": "Connectivity matrix"
- },
- {
- "id": 1697,
- "tag": "Cython"
- },
- {
- "id": 793,
- "tag": "Development"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2119,
- "tag": "ModelDB:195658"
- },
- {
- "id": 620,
- "tag": "Python"
- },
- {
- "id": 726,
- "tag": "Vision"
- }
- ],
- "timestamp_created": "2024-01-12 09:56:33.848081+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/195658",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1546": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 1546,
- "name": "Multiple dynamical modes of thalamic relay neurons (Wang XJ 1994)",
- "repository_type": "github",
- "summary": "The (Wang 1994) papers model was replicated in python by (Detorakis 2016). \"The model is conductance-based and takes advantage of the\r\ninterplay between a T-type calcium current and a non-specific cation sag current and\r\nthus, it is able to generate spindle and delta rhythms.\" The model also generates intermittent phase locking, non periodic firing, bursts, and tonic spike patterns.",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 804,
- "tag": "Bifurcation"
- },
- {
- "id": 566,
- "tag": "Bursting"
- },
- {
- "id": 572,
- "tag": "Calcium dynamics"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2120,
- "tag": "ModelDB:195659"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 853,
- "tag": "Python (web link to model)"
- },
- {
- "id": 592,
- "tag": "Sleep"
- },
- {
- "id": 593,
- "tag": "Spindles"
- }
- ],
- "timestamp_created": "2024-01-12 09:56:34.358097+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/195659",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1547": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1547,
- "name": "LGMD with 3D morphology and active dendrites (Dewell & Gabbiani 2018)",
- "repository_type": "github",
- "summary": "This is a model of the locust LGMD looming sensitive neuron from Dewell & Gabbiani 2018. The morphology was constructed based on 2-photon imaging, and active conductances throughout the neuron were based on sharp electrode recordings in vivo.",
- "tags": [
- {
- "id": 579,
- "tag": "Active Dendrites"
- },
- {
- "id": 1684,
- "tag": "Ca pump"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 580,
- "tag": "I M"
- },
- {
- "id": 575,
- "tag": "I T low threshold"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 747,
- "tag": "I_KD"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2121,
- "tag": "ModelDB:195666"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 587,
- "tag": "Spatio-temporal Activity Patterns"
- },
- {
- "id": 596,
- "tag": "Synaptic Integration"
- },
- {
- "id": 726,
- "tag": "Vision"
- }
- ],
- "timestamp_created": "2024-01-12 09:56:34.884356+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/195666",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1548": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1548,
- "name": "Human L2/3 pyramidal cells with low Cm values (Eyal et al. 2016)",
- "repository_type": "github",
- "summary": "The advanced cognitive capabilities of the human brain are often attributed to our recently evolved neocortex. However, it is not known whether the basic building blocks of human neocortex, the pyramidal neurons, possess unique biophysical properties that might impact on cortical computations. Here we show that layer 2/3 pyramidal neurons from human temporal cortex (HL2/3 PCs) have a specific membrane capacitance (Cm) of ~0.5 \u00b5F/cm2, half of the commonly accepted \u201cuniversal\u201d value (~1 \u00b5F/cm2) for biological membranes. This finding was predicted by fitting in vitro voltage transients to theoretical transients then validated by direct measurement of Cm in nucleated patch experiments. Models of 3D reconstructed HL2/3 PCs demonstrated that such low Cm value significantly enhances both synaptic charge-transfer from dendrites to soma and spike propagation along the axon. This is the first demonstration that human cortical neurons have distinctive membrane properties, suggesting important implications for signal processing in human neocortex.",
- "tags": [
- {
- "id": 727,
- "tag": "Action Potential Initiation"
- },
- {
- "id": 2122,
- "tag": "Membrane Properties"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2123,
- "tag": "ModelDB:195667"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 568,
- "tag": "Parameter Fitting"
- },
- {
- "id": 620,
- "tag": "Python"
- }
- ],
- "timestamp_created": "2024-01-12 09:56:35.416699+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/195667",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "auto_sync": true,
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- "modeling"
- ],
- "default_context": "main",
- "id": 1549,
- "name": "Cognitive and motor cortico-basal ganglia interactions during decision making (Guthrie et al 2013)",
- "repository_type": "github",
- "summary": "This is a re-implementation of Guthrie et al 2013 by Topalidou and Rougier 2015. The original study investigated how multiple level action selection\r\ncould be performed by the basal ganglia.",
- "tags": [
- {
- "id": 771,
- "tag": "Action Selection/Decision Making"
- },
- {
- "id": 825,
- "tag": "Learning"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2124,
- "tag": "ModelDB:195731"
- },
- {
- "id": 801,
- "tag": "Parkinson's"
- },
- {
- "id": 853,
- "tag": "Python (web link to model)"
- }
- ],
- "timestamp_created": "2024-01-12 09:56:35.971725+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/195731",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1550": {
- "auto_sync": true,
- "content_types": "modeling",
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- "modeling"
- ],
- "default_context": "main",
- "id": 1550,
- "name": "Speed/accuracy trade-off between the habitual and the goal-directed processes (Kermati et al. 2011)",
- "repository_type": "github",
- "summary": "\"This study is a reference implementation of Keramati, Dezfouli, and Piray 2011 that\r\nproposed an arbitration mechanism between a goal-directed strategy and a habitual\r\nstrategy, used to model the behavior of rats in instrumental conditionning tasks. The\r\nhabitual strategy is the Kalman Q-Learning from Geist, Pietquin, and Fricout 2009. We\r\nreplicate the results of the first task, i.e. the devaluation experiment with two states\r\nand two actions. ...\"",
- "tags": [
- {
- "id": 771,
- "tag": "Action Selection/Decision Making"
- },
- {
- "id": 825,
- "tag": "Learning"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2125,
- "tag": "ModelDB:195856"
- },
- {
- "id": 853,
- "tag": "Python (web link to model)"
- },
- {
- "id": 809,
- "tag": "Reinforcement Learning"
- }
- ],
- "timestamp_created": "2024-01-12 09:56:36.497322+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/195856",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1551": {
- "auto_sync": true,
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- ],
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- "id": 1551,
- "name": "Borderline Personality Disorder (Berdahl, 2010)",
- "repository_type": "github",
- "summary": "This research developed a neural network simulation constrained by known neuroanatomy and neurophysiology to generate ideas about the etiology of Borderline Personality Disorder. The simulations suggest an important role for the amygdala-ventromedial prefrontal cortex-amygdala circuit.",
- "tags": [
- {
- "id": 2126,
- "tag": "Borderline Personality Disorder (BPD)"
- },
- {
- "id": 755,
- "tag": "C or Cplusplus program"
- },
- {
- "id": 749,
- "tag": "Long-term Synaptic Plasticity"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2127,
- "tag": "ModelDB:195886"
- }
- ],
- "timestamp_created": "2024-01-12 09:56:37.021424+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/195886",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1552": {
- "auto_sync": true,
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- "modeling"
- ],
- "default_context": "master",
- "id": 1552,
- "name": "Reinforcement Learning with Forgetting: Linking Sustained Dopamine to Motivation (Kato Morita 2016)",
- "repository_type": "github",
- "summary": "\"It has been suggested that dopamine (DA) represents\r\nreward-prediction-error (RPE) defined in reinforcement learning and\r\ntherefore DA responds to unpredicted but not predicted\r\nreward.\r\n\r\nHowever, recent studies have found DA response sustained\r\ntowards predictable reward in tasks involving self-paced behavior, and\r\nsuggested that this response represents a motivational signal.\r\n\r\nWe have previously shown that RPE can sustain if there is\r\ndecay/forgetting of learned-values, which can be implemented as decay\r\nof synaptic strengths storing learned-values. This account, however,\r\ndid not explain the suggested link between tonic/sustained DA and\r\nmotivation. In the present work, we explored the motivational effects\r\nof the value-decay in self-paced approach behavior, modeled as a\r\nseries of \u2018Go\u2019 or \u2018No-Go\u2019 selections towards a goal. Through\r\nsimulations, we found that the value-decay can enhance motivation,\r\nspecifically, facilitate fast goal-reaching, albeit\r\ncounterintuitively.\r\n...\"\r\n",
- "tags": [
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2128,
- "tag": "ModelDB:195890"
- },
- {
- "id": 809,
- "tag": "Reinforcement Learning"
- }
- ],
- "timestamp_created": "2024-01-12 09:56:37.798941+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/195890",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1553": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1553,
- "name": "HH model neuron of the Suprachiasmatic Nucleus including a persistent Na+ channel (Paul et al 2016)",
- "repository_type": "github",
- "summary": "Hodgkin-Huxley style model for a neuron of the Suprachiasmatic Nucleus (SCN). Modified from DeWoskin et al, PNAS, 2015 to include a persistent sodium current. The model is used to study the role of the kinase GSK3 in regulating the electrical activity of SCN neurons through a persistent sodium current.",
- "tags": [
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 591,
- "tag": "I K,leak"
- },
- {
- "id": 1532,
- "tag": "I Na, leak"
- },
- {
- "id": 739,
- "tag": "I Na,p"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2129,
- "tag": "ModelDB:196197"
- }
- ],
- "timestamp_created": "2024-01-12 09:56:38.331064+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/196197",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1554": {
- "auto_sync": true,
- "content_types": "modeling",
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- "modeling"
- ],
- "default_context": "main",
- "id": 1554,
- "name": "A dendritic disinhibitory circuit mechanism for pathway-specific gating (Yang et al. 2016)",
- "repository_type": "github",
- "summary": "\"While reading a book in a noisy caf\u00e9, how does your brain \u2018gate in\u2019 visual information while filtering out auditory stimuli? Here we propose a mechanism for such flexible routing of information flow in a complex brain network (pathway-specific gating), tested using a network model of pyramidal neurons and three classes of interneurons with connection probabilities constrained by data. We find that if inputs from different pathways cluster on a pyramidal neuron dendrite, a pathway can be gated-on by a disinhibitory circuit motif. ...\"",
- "tags": [
- {
- "id": 771,
- "tag": "Action Selection/Decision Making"
- },
- {
- "id": 762,
- "tag": "Audition"
- },
- {
- "id": 1478,
- "tag": "Information transfer"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2130,
- "tag": "ModelDB:206227"
- },
- {
- "id": 853,
- "tag": "Python (web link to model)"
- },
- {
- "id": 791,
- "tag": "Rate-coding model neurons"
- },
- {
- "id": 725,
- "tag": "Synaptic Plasticity"
- },
- {
- "id": 726,
- "tag": "Vision"
- }
- ],
- "timestamp_created": "2024-01-12 09:56:38.860185+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/206227",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1555": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1555,
- "name": "Cortex-Basal Ganglia-Thalamus network model (Kumaravelu et al. 2016)",
- "repository_type": "github",
- "summary": "\" ... We developed a biophysical network model comprising of the closed loop cortical-basal ganglia-thalamus circuit representing the healthy and parkinsonian rat brain. The network properties of the model were validated by comparing responses evoked in basal ganglia (BG) nuclei by cortical (CTX) stimulation to published experimental results. A key emergent property of the model was generation of low-frequency network oscillations. Consistent with their putative pathological role, low-frequency oscillations in model BG neurons were exaggerated in the parkinsonian state compared to the healthy condition. ...\"",
- "tags": [
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 831,
- "tag": "Deep brain stimulation"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 589,
- "tag": "I L high threshold"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 575,
- "tag": "I T low threshold"
- },
- {
- "id": 1433,
- "tag": "I_AHP"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2131,
- "tag": "ModelDB:206232"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 801,
- "tag": "Parkinson's"
- }
- ],
- "timestamp_created": "2024-01-12 09:56:39.527816+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/206232",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1556": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1556,
- "name": "A multilayer cortical model to study seizure propagation across microdomains (Basu et al. 2015)",
- "repository_type": "github",
- "summary": "A realistic neural network was used to simulate a region of neocortex to obtain extracellular LFPs from \u2018virtual micro-electrodes\u2019 and produce test data for comparison with multisite microelectrode recordings. A model was implemented in the GENESIS neurosimulator. A simulated region of cortex was represented by layers 2/3, 5/6 (interneurons and pyramidal cells) and layer 4 stelate cells, spaced at 25 \u00b5m in each horizontal direction. Pyramidal cells received AMPA and NMDA inputs from neighboring cells at the basal and apical dendrites.\r\nThe LFP data was generated by simulating 16-site electrode array with the help of \u2018efield\u2019 objects arranged at the predetermined positions with respect to the surface of the simulated network. The LFP for the model is derived from a weighted average of the current sources summed over all cellular compartments. Cell models were taken from from Traub et al. (2005) J Neurophysiol 93(4):2194-232.",
- "tags": [
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 469,
- "tag": "Epilepsy"
- },
- {
- "id": 600,
- "tag": "GENESIS"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 730,
- "tag": "I A, slow"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 589,
- "tag": "I L high threshold"
- },
- {
- "id": 580,
- "tag": "I M"
- },
- {
- "id": 739,
- "tag": "I Na,p"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 575,
- "tag": "I T low threshold"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2132,
- "tag": "ModelDB:206238"
- }
- ],
- "timestamp_created": "2024-01-12 09:56:40.168385+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/206238",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1557": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1557,
- "name": "CA1 pyramidal neuron: dendritic Ca2+ inhibition (Muellner et al. 2015)",
- "repository_type": "github",
- "summary": "In our experimental study, we combined\r\npaired patch-clamp recordings and two-photon\r\nCa2+ imaging to quantify inhibition exerted by individual GABAergic contacts on hippocampal pyramidal cell dendrites. We observed that Ca2+ transients from back-propagating action potentials were significantly reduced during simultaneous activation of individual nearby GABAergic synapses. To simulate dendritic Ca2+ inhibition by individual GABAergic synapses, we employed a multi-compartmental CA1 pyramidal cell model with\r\ndetailed morphology, voltage-gated channel distributions, and calcium dynamics, based with modifications on the model of Poirazi et al.,\r\n2003, modelDB accession # 20212.",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 579,
- "tag": "Active Dendrites"
- },
- {
- "id": 572,
- "tag": "Calcium dynamics"
- },
- {
- "id": 565,
- "tag": "Dendritic Action Potentials"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2133,
- "tag": "ModelDB:206244"
- },
- {
- "id": 577,
- "tag": "NEURON"
- }
- ],
- "timestamp_created": "2024-01-12 09:56:40.748000+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/206244",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1558": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1558,
- "name": "Model of memory linking through memory allocation (Kastellakis et al. 2016)",
- "repository_type": "github",
- "summary": "Here, we present a simplified, biophysically inspired network model that incorporates multiple plasticity processes and explains linking of information at three different levels: (a) learning of a single associative memory (b) rescuing of a weak memory when paired with a strong one and (c) linking of multiple memories across time. By dissecting synaptic from intrinsic plasticity and neuron-wide from dendritically restricted protein capture, the model reveals a simple, unifying principle: Linked memories share synaptic clusters within the dendrites of overlapping populations of neurons",
- "tags": [
- {
- "id": 579,
- "tag": "Active Dendrites"
- },
- {
- "id": 755,
- "tag": "C or Cplusplus program"
- },
- {
- "id": 776,
- "tag": "C or Cplusplus program (web link to model)"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2134,
- "tag": "ModelDB:206249"
- }
- ],
- "timestamp_created": "2024-01-12 09:56:41.293278+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/206249",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1559": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1559,
- "name": "DCN fusiform cell (Ceballos et al. 2016)",
- "repository_type": "github",
- "summary": "Dorsal cochlear nucleus principal neurons, fusiform neurons, display heterogeneous spontaneous action potential activity and thus represent an appropriate model to study the role of different conductances in establishing firing heterogeneity. Particularly, fusiform neurons are divided into quiet, with no spontaneous firing, or active neurons, presenting spontaneous, regular firing. These modes are determined by the expression levels of an intrinsic membrane conductance, an inwardly rectifying potassium current (IKir). We used a computational model to test whether other subthreshold conductances vary homeostatically to maintain membrane excitability constant across the two subtypes. We found that Ih expression covaries specifically with IKir in order to maintain membrane resistance constant. The impact of Ih on membrane resistance is dependent on the level of IKir expression, being much smaller in quiet neurons with bigger IKir, but Ih variations are not relevant for creating the quiet and active phenotypes. We conclude that in fusiform neurons the variations of their different subthreshold conductances are limited to specific conductances in order to create firing heterogeneity and maintain membrane homeostasis.",
- "tags": [
- {
- "id": 75,
- "tag": "Homeostasis"
- },
- {
- "id": 1532,
- "tag": "I Na, leak"
- },
- {
- "id": 739,
- "tag": "I Na,p"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 747,
- "tag": "I_KD"
- },
- {
- "id": 1931,
- "tag": "Kir"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2135,
- "tag": "ModelDB:206252"
- },
- {
- "id": 577,
- "tag": "NEURON"
- }
- ],
- "timestamp_created": "2024-01-12 09:56:41.822345+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/206252",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1560": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 1560,
- "name": "BDNF morphological contributions to AP enhancement (Galati et al. 2016)",
- "repository_type": "github",
- "summary": "\" ... We quantified BDNF\u2019s effect on\r\ncultured cortical neuron morphological parameters and found that BDNF stimulates\r\ndendrite growth and addition of dendrites while increasing both excitatory and inhibitory\r\npresynaptic inputs in a spatially restricted manner. To gain insight into how these\r\ncombined changes in neuron structure and synaptic input impact AP generation, we\r\nused the morphological parameters we gathered to generate computational models.\r\nSimulations suggest that BDNF-induced neuron morphologies generate more APs\r\nunder a wide variety of conditions. ...\"",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 579,
- "tag": "Active Dendrites"
- },
- {
- "id": 793,
- "tag": "Development"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2136,
- "tag": "ModelDB:206256"
- },
- {
- "id": 743,
- "tag": "NEURON (web link to model)"
- }
- ],
- "timestamp_created": "2024-01-12 09:56:42.357242+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/206256",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1561": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1561,
- "name": "Cerebellum granule cell FHF (Dover et al. 2016)",
- "repository_type": "github",
- "summary": "\"Neurons in vertebrate central nervous systems initiate and conduct sodium action potentials in distinct subcellular compartments that differ architecturally and electrically. Here, we report several unanticipated passive and active properties of the cerebellar granule cell's unmyelinated axon. Whereas spike initiation at the axon initial segment relies on sodium channel (Nav)-associated fibroblast growth factor homologous factor (FHF) proteins to delay Nav inactivation, distal axonal Navs show little FHF association or FHF requirement for high-frequency transmission, velocity and waveforms of conducting action potentials. ...'",
- "tags": [
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 580,
- "tag": "I M"
- },
- {
- "id": 739,
- "tag": "I Na,p"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 1931,
- "tag": "Kir"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2137,
- "tag": "ModelDB:206267"
- },
- {
- "id": 577,
- "tag": "NEURON"
- }
- ],
- "timestamp_created": "2024-01-12 09:56:42.933524+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/206267",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1562": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1562,
- "name": "Comparing correlation responses to motion estimation models (Salazar-Gatzimas et al. 2016)",
- "repository_type": "github",
- "summary": "Code to generate responses of HRC-like and BL-like model elementary motion detectors to correlated noise stimuli, including two models with more realistic temporal filtering.",
- "tags": [
- {
- "id": 729,
- "tag": "Invertebrate"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2138,
- "tag": "ModelDB:206310"
- },
- {
- "id": 1700,
- "tag": "Motion Detection"
- }
- ],
- "timestamp_created": "2024-01-12 09:56:43.562718+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/206310",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1563": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1563,
- "name": "Spatially-varying glutamate diffusion coefficient at CA1 synaptic cleft space (Gupta et al. 2016)",
- "repository_type": "github",
- "summary": "Due to the heterogeneous macromolecular crowding and geometrical irregularity at central excitatory synapses, the diffusion coefficient of glutamate may exhibit spatial variation across the cleft space. To take into account the effect of emergent cleft heterogeneity on the generation of excitatory postsynaptic currents (EPSCs), a gamma statistical distribution of the glutamate diffusion coefficient is considered and, using the principle of superstatistics, the glutamate transients are computed as well as the activation of AMPA receptors is performed. This model demonstrates the numerical simulation of the Brownian diffusion of glutamate under distributed diffusion coefficient, the subsequent stochastic activation of AMPA receptors using Milstein-Nicoll scheme and modified Gillespie algorithm with minimum time-step correction, and the eventual stochastic profile of EPSC generation. The study is based on the CA1 synapses located at the dendrites of CA1 pyramidal neurons in the mammalian hippocampal region.",
- "tags": [
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2139,
- "tag": "ModelDB:206328"
- },
- {
- "id": 1919,
- "tag": "Reaction-diffusion"
- },
- {
- "id": 725,
- "tag": "Synaptic Plasticity"
- }
- ],
- "timestamp_created": "2024-01-12 09:56:44.067510+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/206328",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1564": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1564,
- "name": "Large-scale neural model of visual short-term memory (Ulloa, Horwitz 2016; Horwitz, et al. 2005,...)",
- "repository_type": "github",
- "summary": "Large-scale neural model of visual short term memory embedded into a 998-node connectome. The model simulates electrical activity across neuronal populations of a number of brain regions and converts that activity into fMRI and MEG time-series. The model uses a neural simulator developed at the Brain Imaging and Modeling Section of the National Institutes of Health.",
- "tags": [
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2140,
- "tag": "ModelDB:206337"
- },
- {
- "id": 620,
- "tag": "Python"
- },
- {
- "id": 794,
- "tag": "Working memory"
- }
- ],
- "timestamp_created": "2024-01-12 09:56:44.553503+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/206337",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1565": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 1565,
- "name": "Continuous lateral oscillations as a mechanism for taxis in Drosophila larvae (Wystrach et al 2016)",
- "repository_type": "github",
- "summary": "\" ...Our analysis of larvae motion reveals a rhythmic, continuous lateral oscillation of the anterior body, encompassing all head-sweeps, small or large, without breaking the oscillatory rhythm. Further, we show that an agent-model that embeds this hypothesis reproduces a surprising number of taxis signatures observed in larvae. Also, by coupling the sensory input to a neural oscillator in continuous time, we show that the mechanism is robust and biologically plausible. ...\"",
- "tags": [
- {
- "id": 771,
- "tag": "Action Selection/Decision Making"
- },
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 729,
- "tag": "Invertebrate"
- },
- {
- "id": 767,
- "tag": "MATLAB (web link to model)"
- },
- {
- "id": 2141,
- "tag": "Mathematica (web link to model)"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2142,
- "tag": "ModelDB:206356"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- }
- ],
- "timestamp_created": "2024-01-12 09:56:45.048044+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/206356",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1566": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1566,
- "name": "Inverse stochastic resonance of cerebellar Purkinje cell (Buchin et al. 2016)",
- "repository_type": "github",
- "summary": "This code shows the simulations of the adaptive exponential integrate-and-fire model (http://www.scholarpedia.org/article/Adaptive_exponential_integrate-and-fire_model) at different stimulus conditions. The parameters of the model were tuned to the Purkinje cell of cerebellum to reproduce the inhibiion of these cells by noisy current injections. Similar experimental protocols were also applied to the detailed biophysical model of Purkinje cells, de Shutter & Bower (1994) model. The repository also includes the XPPaut version of the model with the corresponding bifurcation analysis.",
- "tags": [
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 1478,
- "tag": "Information transfer"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2143,
- "tag": "ModelDB:206364"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 744,
- "tag": "Synaptic noise"
- },
- {
- "id": 759,
- "tag": "XPPAUT"
- }
- ],
- "timestamp_created": "2024-01-12 09:56:45.584005+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/206364",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1567": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1567,
- "name": "Subiculum network model with dynamic chloride/potassium homeostasis (Buchin et al 2016)",
- "repository_type": "github",
- "summary": "This is the code implementing the single neuron and spiking neural network dynamics. The network has the dynamic ion concentrations of extracellular potassium and intracellular chloride. The code contains multiple parameter variations to study various mechanisms of the neural excitability in the context of chloride homeostasis.",
- "tags": [
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 1527,
- "tag": "Brain Rhythms"
- },
- {
- "id": 566,
- "tag": "Bursting"
- },
- {
- "id": 1592,
- "tag": "Chloride regulation"
- },
- {
- "id": 469,
- "tag": "Epilepsy"
- },
- {
- "id": 734,
- "tag": "Extracellular Fields"
- },
- {
- "id": 75,
- "tag": "Homeostasis"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 765,
- "tag": "I Chloride"
- },
- {
- "id": 1531,
- "tag": "I Cl, leak"
- },
- {
- "id": 591,
- "tag": "I K,leak"
- },
- {
- "id": 580,
- "tag": "I M"
- },
- {
- "id": 1532,
- "tag": "I Na, leak"
- },
- {
- "id": 739,
- "tag": "I Na,p"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 1728,
- "tag": "I_HCO3"
- },
- {
- "id": 1685,
- "tag": "KCC2"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2144,
- "tag": "ModelDB:206365"
- },
- {
- "id": 740,
- "tag": "Na/K pump"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 1808,
- "tag": "Potassium buffering"
- },
- {
- "id": 759,
- "tag": "XPPAUT"
- }
- ],
- "timestamp_created": "2024-01-12 09:56:46.147261+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/206365",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1568": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1568,
- "name": "Dentate Gyrus model including Granule cells with dendritic compartments (Chavlis et al 2017)",
- "repository_type": "github",
- "summary": "Here we investigate the role of dentate granule cell dendrites in pattern separation. The model consists of point neurons (Integrate and fire) and in principal neurons, the granule cells, we have incorporated various number of dendrites.",
- "tags": [
- {
- "id": 645,
- "tag": "Brian"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2145,
- "tag": "ModelDB:206372"
- },
- {
- "id": 2064,
- "tag": "Pattern Separation"
- },
- {
- "id": 620,
- "tag": "Python"
- }
- ],
- "timestamp_created": "2024-01-12 09:56:46.682989+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/206372",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1569": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1569,
- "name": "Feedforward inhibition in pyramidal cells (Ferrante & Ascoli 2015)",
- "repository_type": "github",
- "summary": "\"Feedforward inhibition (FFI) enables pyramidal cells in area CA1 of the hippocampus\r\n(CA1PCs) to remain easily excitable while faithfully representing a broad range of\r\nexcitatory inputs without quickly saturating. Despite the cortical ubiquity of FFI,\r\nits specific function is not completely understood. FFI in CA1PCs is mediated by\r\ntwo physiologically and morphologically distinct GABAergic interneurons: fast-spiking,\r\nperisomatic-targeting basket cells and regular-spiking, dendritic-targeting bistratified\r\ncells. These two FFI pathways might create layer-specific computational sub-domains\r\nwithin the same CA1PC, but teasing apart their specific contributions remains\r\nexperimentally challenging. We implemented a biophysically realistic model of CA1PCs\r\nusing 40 digitally reconstructed morphologies and constraining synaptic numbers,\r\nlocations, amplitude, and kinetics with available experimental data. ...\"",
- "tags": [
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2146,
- "tag": "ModelDB:206378"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 596,
- "tag": "Synaptic Integration"
- }
- ],
- "timestamp_created": "2024-01-12 09:56:47.271918+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/206378",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1570": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1570,
- "name": "Excitability of DA neurons and their regulation by synaptic input (Morozova et al. 2016a, 2016b)",
- "repository_type": "github",
- "summary": "This code contains conductance-based models of Dopaminergic (DA) and GABAergic neurons, used in Morozova et al 2016 PLOS Computational Biology paper in order to study the type of excitability of the DA neurons and how it is influenced by the intrinsic and synaptic currents. We identified the type of excitability by calculating bifurcation diagrams and F-I curves using XPP file. This model was also used in Morozova et al 2016 J. Neurophysiology paper in order to study the effect of synchronization in GABAergic inputs on the firing dynamics of the DA neuron.",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 804,
- "tag": "Bifurcation"
- },
- {
- "id": 566,
- "tag": "Bursting"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2147,
- "tag": "ModelDB:206380"
- },
- {
- "id": 768,
- "tag": "Synaptic Convergence"
- },
- {
- "id": 759,
- "tag": "XPPAUT"
- }
- ],
- "timestamp_created": "2024-01-12 09:56:47.781348+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/206380",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1571": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1571,
- "name": "In vivo imaging of dentate gyrus mossy cells in behaving mice (Danielson et al 2017)",
- "repository_type": "github",
- "summary": "Mossy cells in the hilus of the dentate gyrus constitute a major excitatory principal cell type in the mammalian hippocampus, however, it remains unknown how these cells behave in vivo. Here, we have used two-photon Ca2+ imaging to monitor the activity of mossy cells in awake, behaving mice. We find that mossy cells are significantly more active than dentate granule cells in vivo, exhibit significant spatial tuning during head-fixed spatial navigation, and undergo robust remapping of their spatial representations in response to contextual manipulation. Our results provide the first characterization of mossy cells in the behaving animal and demonstrate their active participation in spatial coding and contextual representation.",
- "tags": [
- {
- "id": 645,
- "tag": "Brian"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2148,
- "tag": "ModelDB:206397"
- },
- {
- "id": 2064,
- "tag": "Pattern Separation"
- },
- {
- "id": 620,
- "tag": "Python"
- }
- ],
- "timestamp_created": "2024-01-12 09:56:48.285559+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/206397",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1572": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1572,
- "name": "Spikelet generation and AP initiation in a L5 neocortical pyr neuron (Michalikova et al. 2017) Fig 1",
- "repository_type": "github",
- "summary": "The article by Michalikova et al. (2017) explores the generation of spikelets in cortical pyramidal neurons. The model cell, adapted from Hu et al. (2009), is a layer V pyramidal neuron. The cell is stimulated by fluctuating synaptic inputs and generates somatic APs and spikelets in response. The spikelets are initiated as APs at the AIS that do not activate the soma.",
- "tags": [
- {
- "id": 727,
- "tag": "Action Potential Initiation"
- },
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 728,
- "tag": "Axonal Action Potentials"
- },
- {
- "id": 786,
- "tag": "Electrotonus"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2149,
- "tag": "ModelDB:206398"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 620,
- "tag": "Python"
- }
- ],
- "timestamp_created": "2024-01-12 09:56:48.824484+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/206398",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1573": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1573,
- "name": "Spikelet generation and AP initiation in a simplified pyr neuron (Michalikova et al. 2017) Fig 3",
- "repository_type": "github",
- "summary": "The article by Michalikova et al. (2017) explores the generation of spikelets in cortical pyramidal neurons.\r\nThis package contains code for simulating the model with simplified morphology shown in Figs 3 and S2.",
- "tags": [
- {
- "id": 727,
- "tag": "Action Potential Initiation"
- },
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 728,
- "tag": "Axonal Action Potentials"
- },
- {
- "id": 786,
- "tag": "Electrotonus"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2150,
- "tag": "ModelDB:206400"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 620,
- "tag": "Python"
- }
- ],
- "timestamp_created": "2024-01-12 09:56:49.364122+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/206400",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1574": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1574,
- "name": "Earthworm medial giant fiber conduction velocity across electrical synapses (Heller, Crisp 2016)",
- "repository_type": "github",
- "summary": "The earthworm medial giant fiber (MGF) is composed of many neurons electrically coupled by high fidelity gap junctions. In addition, the MGF exhibits a distinct taper in diameter from anterior to posterior. The role of these gap junctions and their interaction with axonal taper in predicting conduction velocity has not been studied closely in the annelid. A model of an electrical synapse in the MGF was created to investigate the influence of, and interaction between, these two parameters.",
- "tags": [
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2151,
- "tag": "ModelDB:206405"
- },
- {
- "id": 620,
- "tag": "Python"
- }
- ],
- "timestamp_created": "2024-01-12 09:56:49.862731+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/206405",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1575": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1575,
- "name": "A network of AOB mitral cells that produces infra-slow bursting (Zylbertal et al. 2017)",
- "repository_type": "github",
- "summary": "Infra-slow rhythmic neuronal activity with very long (> 10 s) period duration was described in many brain areas but little is known about the role of this activity and the mechanisms that produce it. Here we combine experimental and computational methods to show that synchronous infra-slow bursting activity in mitral cells of the mouse accessory olfactory bulb (AOB) emerges from interplay between intracellular dynamics and network connectivity. In this novel mechanism, slow intracellular Na+ dynamics endow AOB mitral cells with a weak tendency to burst, which is further enhanced and stabilized by chemical and electrical synapses between them. Combined with the unique topology of the AOB network, infra-slow bursting enables integration and binding of multiple chemosensory stimuli over prolonged time scale.\r\nThe example protocol simulates a two-glomeruli network with a single shared cell. Although each glomerulus is stimulated at a different time point, the activity of the entire population becomes synchronous (see paper Fig. 8)",
- "tags": [
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 566,
- "tag": "Bursting"
- },
- {
- "id": 731,
- "tag": "I CAN"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2152,
- "tag": "ModelDB:207695"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 738,
- "tag": "Na/Ca exchanger"
- },
- {
- "id": 740,
- "tag": "Na/K pump"
- },
- {
- "id": 588,
- "tag": "Olfaction"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 2058,
- "tag": "Persistent activity"
- },
- {
- "id": 620,
- "tag": "Python"
- },
- {
- "id": 586,
- "tag": "Synchronization"
- }
- ],
- "timestamp_created": "2024-01-12 09:56:50.380484+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/207695",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1576": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1576,
- "name": "Infraslow intrinsic rhythmogenesis in a subset of AOB projection neurons (Gorin et al 2016)",
- "repository_type": "github",
- "summary": "We investigated patterns of spontaneous neuronal activity in mouse accessory olfactory bulb mitral cells, the direct neural link between vomeronasal sensory input and limbic output. Both in vitro and in vivo, we identify a subpopulation of mitral cells that exhibit slow stereotypical rhythmic discharge. In intrinsically rhythmogenic neurons, these periodic activity patterns are maintained in absence of fast synaptic drive. The physiological mechanism underlying mitral cell autorhythmicity involves cyclic activation of three interdependent ionic conductances: subthreshold persistent Na(+) current, R-type Ca(2+) current, and Ca(2+)-activated big conductance K(+) current. Together, the interplay of these distinct conductances triggers infraslow intrinsic oscillations with remarkable periodicity, a default output state likely to affect sensory processing in limbic circuits. The model reproduces the intrinsic firing in a reconstructed single AOB mitral cell with ion channels kinetics fitted to experimental measurements of their steady state and time course.",
- "tags": [
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 739,
- "tag": "I Na,p"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 844,
- "tag": "I R"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2153,
- "tag": "ModelDB:217783"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 588,
- "tag": "Olfaction"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 758,
- "tag": "Sensory processing"
- }
- ],
- "timestamp_created": "2024-01-12 09:56:50.941107+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/217783",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1577": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1577,
- "name": "Regulation of motoneuron excitability by KCNQ/Kv7 modulators (Lombardo & Harrington 2016)",
- "repository_type": "github",
- "summary": "\" ... Computer simulations confirmed that pharmacological enhancement\r\nof KCNQ/Kv7 channel (M current) activity decreases excitability and\r\nalso suggested that the effects of inhibition of KCNQ/Kv7 channels on\r\nthe excitability of spinal MNs do not depend on a direct effect in\r\nthese neurons but likely on spinal cord synaptic partners. These\r\nresults indicate that KCNQ/Kv7 channels have a fundamental role in the\r\nmodulation of the excitability of spinal MNs acting both in these\r\nneurons and in their local presynaptic partners. ...\"",
- "tags": [
- {
- "id": 728,
- "tag": "Axonal Action Potentials"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 580,
- "tag": "I M"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2154,
- "tag": "ModelDB:217882"
- },
- {
- "id": 577,
- "tag": "NEURON"
- }
- ],
- "timestamp_created": "2024-01-12 09:56:51.568671+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/217882",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1578": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1578,
- "name": "Parallel cortical inhibition processing enables context-dependent behavior (Kuchibhotla et al. 2016)",
- "repository_type": "github",
- "summary": "Physical features of sensory stimuli are fixed, but sensory perception is context dependent. The precise mechanisms that\r\ngovern contextual modulation remain unknown. Here, we trained mice to switch between two contexts: passively listening to pure tones and performing a recognition task for the same stimuli. Two-photon imaging showed that many excitatory neurons in auditory cortex were suppressed during behavior, while some cells became more active. Whole-cell recordings showed that excitatory inputs were affected only modestly by context, but inhibition was more sensitive, with PV+, SOM+, and VIP+ interneurons balancing inhibition and disinhibition within the network. Cholinergic modulation was involved in context switching, with cholinergic axons increasing activity during behavior and directly depolarizing inhibitory cells. Network modeling captured these findings, but only when modulation coincidently drove all three interneuron subtypes, ruling out either inhibition or disinhibition alone as sole mechanism for active engagement. Parallel processing of cholinergic modulation by cortical interneurons therefore enables context-dependent behavior.",
- "tags": [
- {
- "id": 762,
- "tag": "Audition"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2155,
- "tag": "ModelDB:217958"
- },
- {
- "id": 791,
- "tag": "Rate-coding model neurons"
- },
- {
- "id": 758,
- "tag": "Sensory processing"
- }
- ],
- "timestamp_created": "2024-01-12 09:56:52.168969+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/217958",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1579": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 1579,
- "name": "Reverberatory bursts propagation and synchronization in developing cultured NNs (Huang et al 2016)",
- "repository_type": "github",
- "summary": "\"Developing networks of neural systems can exhibit spontaneous,\r\nsynchronous activities called neural bursts, which can be important in\r\nthe organization of functional neural circuits.\r\n\r\n...\r\n\r\nUsing a propagation model we infer the spreading\r\nspeed of the spiking activity, which increases as the culture ages.\r\n\r\nWe\r\nperform computer simulations of the system using a physiological model\r\nof spiking networks in two spatial dimensions and find the parameters\r\nthat reproduce the observed resynchronization of spiking in the\r\nbursts.\r\n\r\nAn analysis of the simulated dynamics suggests that the\r\ndepletion of synaptic resources causes the resynchronization.\r\n\r\nThe spatial propagation dynamics of the simulations match well with\r\nobservations over the course of a burst and point to an interplay of\r\nthe synaptic efficacy and the noisy neural self-activation in\r\nproducing the morphology of the bursts.\"",
- "tags": [
- {
- "id": 566,
- "tag": "Bursting"
- },
- {
- "id": 776,
- "tag": "C or Cplusplus program (web link to model)"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2156,
- "tag": "ModelDB:218015"
- },
- {
- "id": 586,
- "tag": "Synchronization"
- }
- ],
- "timestamp_created": "2024-01-12 09:56:52.663204+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/218015",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1580": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1580,
- "name": "Supervised learning with predictive coding (Whittington & Bogacz 2017)",
- "repository_type": "github",
- "summary": "\"To effciently learn from feedback, cortical networks need to update synaptic weights\r\non multiple levels of cortical hierarchy. An effective and well-known algorithm for\r\ncomputing such changes in synaptic weights is the error back-propagation algorithm. However, in the back-propagation algorithm, the change in synaptic weights\r\nis a complex function of weights and activities of neurons not directly connected\r\nwith the synapse being modified, whereas the changes in biological synapses are\r\ndetermined only by the activity of pre-synaptic and post-synaptic neurons. Several\r\nmodels have been proposed that approximate the back-propagation algorithm with\r\nlocal synaptic plasticity, but these models require complex external control over the\r\nnetwork or relatively complex plasticity rules. Here we show that a network developed in the predictive coding framework can efficiently perform supervised learning\r\nfully autonomously, employing only simple local Hebbian plasticity. ...\"",
- "tags": [
- {
- "id": 808,
- "tag": "Hebbian plasticity"
- },
- {
- "id": 825,
- "tag": "Learning"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2157,
- "tag": "ModelDB:218084"
- },
- {
- "id": 725,
- "tag": "Synaptic Plasticity"
- }
- ],
- "timestamp_created": "2024-01-12 09:56:53.150116+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/218084",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1581": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1581,
- "name": "Hybrid oscillatory interference / continuous attractor NN of grid cell firing (Bush & Burgess 2014)",
- "repository_type": "github",
- "summary": "Matlab code to simulate a hybrid oscillatory interference - continuous attractor network model of grid cell firing in pyramidal and stellate cells of rodent medial entorhinal cortex",
- "tags": [
- {
- "id": 1461,
- "tag": "Grid cell"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2158,
- "tag": "ModelDB:218085"
- }
- ],
- "timestamp_created": "2024-01-12 09:56:53.665772+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/218085",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1582": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1582,
- "name": "Changes of ionic concentrations during seizure transitions (Gentiletti et al. 2016)",
- "repository_type": "github",
- "summary": "\"... In order to\r\ninvestigate the respective roles of synaptic interactions and\r\nnonsynaptic mechanisms in seizure transitions, we developed a\r\ncomputational model of hippocampal cells, involving the extracellular\r\nspace, realistic dynamics of Na+, K+, Ca2+ and Cl - ions, glial uptake\r\nand extracellular diffusion mechanisms. We show that the network\r\nbehavior with fixed ionic concentrations may be quite different from\r\nthe neurons\u2019 behavior when more detailed modeling of ionic dynamics is\r\nincluded. In particular, we show that in the extended model strong\r\ndischarge of inhibitory interneurons may result in long lasting\r\naccumulation of extracellular K+, which sustains the depolarization of\r\nthe principal cells and causes their pathological discharges.\r\n...\"\r\n",
- "tags": [
- {
- "id": 469,
- "tag": "Epilepsy"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 591,
- "tag": "I K,leak"
- },
- {
- "id": 589,
- "tag": "I L high threshold"
- },
- {
- "id": 580,
- "tag": "I M"
- },
- {
- "id": 1532,
- "tag": "I Na, leak"
- },
- {
- "id": 739,
- "tag": "I Na,p"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 1433,
- "tag": "I_AHP"
- },
- {
- "id": 1685,
- "tag": "KCC2"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2159,
- "tag": "ModelDB:222321"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 740,
- "tag": "Na/K pump"
- },
- {
- "id": 1919,
- "tag": "Reaction-diffusion"
- },
- {
- "id": 569,
- "tag": "Simplified Models"
- },
- {
- "id": 586,
- "tag": "Synchronization"
- }
- ],
- "timestamp_created": "2024-01-12 09:56:54.176380+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/222321",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1583": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1583,
- "name": "Synaptic integration by MEC neurons (Justus et al. 2017)",
- "repository_type": "github",
- "summary": "Pyramidal cells, stellate cells and fast-spiking interneurons receive running speed dependent glutamatergic input from septo-entorhinal projections. These models simulate the integration of this input by the different MEC celltypes.",
- "tags": [
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2160,
- "tag": "ModelDB:222359"
- },
- {
- "id": 577,
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- ],
- "timestamp_created": "2024-01-12 09:56:54.736291+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/222359",
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- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
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- "id": 1584,
- "name": "Model of a BDNF feedback loop (Zhang et al 2016)",
- "repository_type": "github",
- "summary": "\"Inhibitory avoidance (IA) training in rodents initiates a molecular\r\ncascade within hippocampal neurons. This cascade contributes to the\r\ntransition of short- to long-term memory (i.e., consolidation). Here,\r\na differential equation-based model was developed to describe a\r\npositive feedback loop within this molecular cascade. The feedback\r\nloop begins with an IA-induced release of brain-derived neurotrophic\r\nfactor (BDNF), which in turn leads to rapid phosphorylation of the\r\ncAMP response element-binding protein (pCREB), and a subsequent\r\nincrease in the level of the beta isoform of the CCAAT/enhancer binding\r\nprotein (C/EBPbeta). \r\n ... \" See paper for more.",
- "tags": [
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- "id": 564,
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- "id": 2161,
- "tag": "ModelDB:222715"
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- "timestamp_created": "2024-01-12 09:56:55.232521+00:00",
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- "summary": "These NEURON simulations show the effect of prolonged inactivation of sodium channels on attenuation of trains of backpropagating action potentials (bAPs). The new sodium channel model is a Markov model derived using a state-mutating genetic algorithm, as described in the paper.\r\n",
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- "id": 736,
- "tag": "Action Potentials"
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- "tag": "I Sodium"
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- "timestamp_created": "2024-01-12 09:56:55.740741+00:00",
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- "name": "Brain networks simulators - a comparative study (Tikidji-Hamburyan et al 2017)",
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- "summary": "\" ... In this article, we select the three most popular simulators, as determined by the number of models in the ModelDB database, such as NEURON, GENESIS, and BRIAN, and perform an independent evaluation of these simulators. In addition, we study NEST, one of the lead simulators of the Human Brain Project. First, we study them based on one of the most important characteristics, the range of supported models. Our investigation reveals that brain network simulators may be biased toward supporting a specific set of models. ... we carry out an evaluation using two case studies: a large network with simplified neural and synaptic models and a small network with detailed models. These two case studies allow us to avoid any bias toward a particular software package ...\"",
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- "id": 645,
- "tag": "Brian"
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- "tag": "ModelDB:222725"
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- "id": 611,
- "tag": "NEST"
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- "timestamp_created": "2024-01-12 09:56:56.318202+00:00",
- "timestamp_updated": "---",
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- "id": 1587,
- "name": "Distance-dependent synaptic strength in CA1 pyramidal neurons (Menon et al. 2013)",
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- "summary": "Menon et al. (2013) describes the experimentally-observed variation in synaptic AMPA and NMDA conductance as a function of distance from the soma. This model explores the effect of this variation on somatic EPSPs and dendritic spike initiation, as compared to the case of uniform AMPA and NMDA conductance.",
- "tags": [
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- "id": 590,
- "tag": "I A"
- },
- {
- "id": 576,
- "tag": "I K"
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- "timestamp_created": "2024-01-12 09:56:56.843366+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/222726",
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- "id": 1588,
- "name": "A model of cerebellar LTD including RKIP inactivation of Raf and MEK (Hepburn et al 2017)",
- "repository_type": "github",
- "summary": "An updated stochastic model of cerebellar Long Term Depression (LTD) with improved realism. Dissociation of Raf kinase inhibitor protein (RKIP) from Mitogen-activated protein kinase kinase (MEK) and Raf kinase are added to an earlier published model. Calcium dynamics is updated as a constant-rate influx to more closely match experiment. AMPA receptor interactions are improved by adding phosphorylation and dephosphorylation of AMPA receptors when bound to glutamate receptor interacting protein (GRIP). The model is tuned to reproduce experimental calcium peak vs LTD amplitude curves accurately at 4 different calcium pulse durations.",
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- "id": 749,
- "tag": "Long-term Synaptic Plasticity"
- },
- {
- "id": 564,
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- "timestamp_created": "2024-01-12 09:56:57.372183+00:00",
- "timestamp_updated": "---",
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- "name": "A simple model of neuromodulatory state-dependent synaptic plasticity (Pedrosa and Clopath, 2016)",
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- "summary": "The model is used to illustrate the role of neuromodulators in cortical plasticity. The model consists of a feedforward network with 1 postsynaptic neuron with plastic synaptic weights. These weights are updated through a spike-timing-dependent plasticity rule. \r\n\"First, we explore the ability of neuromodulators to gate plasticity by reshaping the learning window for spike-timing-dependent plasticity. Using a simple computational model, we implement four different learning rules and demonstrate their effects on receptive field plasticity. We then compare the neuromodulatory effects of upregulating learning rate versus the effects of upregulating neuronal activity. \"",
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- "id": 825,
- "tag": "Learning"
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- "timestamp_created": "2024-01-12 09:56:57.887561+00:00",
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- "name": "Interneuron Specific 3 Interneuron Model (Guet-McCreight et al, 2016)",
- "repository_type": "github",
- "summary": "In this paper we develop morphologically detailed multi-compartment models of Hippocampal CA1 interneuron specific 3 interneurons using cell current-clamp recordings and dendritic calcium imaging data. In doing so, we developed several variant models, as outlined in the associated README.html file.",
- "tags": [
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- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 579,
- "tag": "Active Dendrites"
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- "id": 578,
- "tag": "Activity Patterns"
- },
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- "id": 873,
- "tag": "Depolarization block"
- },
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- "id": 571,
- "tag": "Detailed Neuronal Models"
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- "id": 590,
- "tag": "I A"
- },
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- "id": 739,
- "tag": "I Na,p"
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- "id": 574,
- "tag": "I Na,t"
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- "tag": "Ion Channel Kinetics"
- },
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- "id": 564,
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- "id": 2168,
- "tag": "ModelDB:223031"
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- "timestamp_created": "2024-01-12 09:56:58.392504+00:00",
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- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
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- "id": 1591,
- "name": "Ca2+ oscillations in single astrocytes (Lavrentovich and Hemkin 2008) (python) (Manninen et al 2017)",
- "repository_type": "github",
- "summary": "We tested the reproducibility and comparability of four astrocyte models (Manninen, Havela, Linne, 2017). Model by Lavrentovich and Hemkin (2008) was one of them. We implemented and ran the model by Lavrentovich and Hemkin (2008) using Jupyter Notebook. Model code produces results of Figure 1 in Manninen, Havela, Linne (2017).",
- "tags": [
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- "id": 572,
- "tag": "Calcium dynamics"
- },
- {
- "id": 564,
- "tag": "ModelDB"
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- "id": 2169,
- "tag": "ModelDB:223144"
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- "tag": "Python"
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- "id": 751,
- "tag": "Signaling pathways"
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- "timestamp_created": "2024-01-12 09:56:59.063121+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/223144",
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- ],
- "default_context": "master",
- "id": 1592,
- "name": "Glutamate-evoked Ca2+ oscillations in single astrocytes (De Pitta et al. 2009) (Manninen et al 2017)",
- "repository_type": "github",
- "summary": "We tested the reproducibility and comparability of four astrocyte models (Manninen, Havela, Linne, 2017). Model by De Pitta et al. (2009) was one of them. We implemented and ran the model by De Pitta et al. (2009) using Jupyter Notebook. Model code produces results of Figure 1 and Figures 3-5 in Manninen, Havela, Linne (2017).",
- "tags": [
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- "id": 572,
- "tag": "Calcium dynamics"
- },
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- "id": 564,
- "tag": "ModelDB"
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- "id": 2170,
- "tag": "ModelDB:223269"
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- "tag": "Oscillations"
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- "tag": "Python"
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- "id": 751,
- "tag": "Signaling pathways"
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- "timestamp_created": "2024-01-12 09:56:59.608339+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/223269",
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- "first_name": "OSB",
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- "default_context": "master",
- "id": 1593,
- "name": "Spontaneous calcium oscillations in single astrocytes (Riera et al. 2011) (Manninen et al 2017)",
- "repository_type": "github",
- "summary": "We tested the reproducibility and comparability of four astrocyte models (Manninen, Havela, Linne, 2017). Model by Riera et al. (2011) was one of them. We implemented and ran the model by Riera et al. (2011) using Jupyter Notebook. Model codes produce results of Figures 1 and 2 in Manninen, Havela, Linne (2017).",
- "tags": [
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- "id": 572,
- "tag": "Calcium dynamics"
- },
- {
- "id": 564,
- "tag": "ModelDB"
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- "id": 2171,
- "tag": "ModelDB:223273"
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- "id": 620,
- "tag": "Python"
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- "id": 751,
- "tag": "Signaling pathways"
- }
- ],
- "timestamp_created": "2024-01-12 09:57:00.124702+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/223273",
- "user": {
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- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
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- "id": 1594,
- "name": "Glutamate-evoked Ca2+ oscillations in single astrocytes (Modified from Dupont et al. 2011)",
- "repository_type": "github",
- "summary": "We tested the reproducibility and comparability of four astrocyte models (Manninen, Havela, Linne, 2017). Model by Dupont et al. (2011) was one of them, but we had to modify the model to get more similar results as in the original publication. We implemented and ran the modified model using Jupyter Notebook. Model code produces results of Figure 1 and Figures 3-5 in Manninen, Havela, Linne (2017).",
- "tags": [
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- "id": 572,
- "tag": "Calcium dynamics"
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- "id": 564,
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- "id": 2172,
- "tag": "ModelDB:223274"
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- "id": 620,
- "tag": "Python"
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- "id": 751,
- "tag": "Signaling pathways"
- }
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- "timestamp_created": "2024-01-12 09:57:00.654496+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/223274",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "1595": {
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- "content_types": "modeling",
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- "default_context": "main",
- "id": 1595,
- "name": "Reproducibility and comparability of models for astrocyte Ca2+ excitability (Manninen et al 2017)",
- "repository_type": "github",
- "summary": "We tested the reproducibility and comparability of four astrocyte models (Manninen, Havela, Linne, 2017). We implemented and ran the python models using Jupyter Notebook. Model code produces results of Figure 1 and Figures 3-5 and partly Figure 2 in Manninen, Havela, Linne (2017).",
- "tags": [
- {
- "id": 572,
- "tag": "Calcium dynamics"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2173,
- "tag": "ModelDB:223648"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 853,
- "tag": "Python (web link to model)"
- },
- {
- "id": 751,
- "tag": "Signaling pathways"
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- ],
- "timestamp_created": "2024-01-12 09:57:01.163257+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/223648",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "1596": {
- "auto_sync": true,
- "content_types": "modeling",
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- "default_context": "master",
- "id": 1596,
- "name": "Distinct current modules shape cellular dynamics in model neurons (Alturki et al 2016)",
- "repository_type": "github",
- "summary": "\" ... We hypothesized that currents are grouped into distinct\r\nmodules that shape specific neuronal characteristics or signatures,\r\nsuch as resting potential, sub-threshold oscillations,\r\nand spiking waveforms, for several classes of\r\nneurons. For such a grouping to occur, the currents within\r\none module should have minimal functional interference\r\nwith currents belonging to other modules. This condition\r\nis satisfied if the gating functions of currents in the same\r\nmodule are grouped together on the voltage axis; in contrast,\r\nsuch functions are segregated along the voltage axis\r\nfor currents belonging to different modules. We tested this\r\nhypothesis using four published example case models and\r\nfound it to be valid for these classes of neurons. ...\"",
- "tags": [
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 756,
- "tag": "Methods"
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- "id": 564,
- "tag": "ModelDB"
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- {
- "id": 2174,
- "tag": "ModelDB:223649"
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- {
- "id": 577,
- "tag": "NEURON"
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- "id": 588,
- "tag": "Olfaction"
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- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 569,
- "tag": "Simplified Models"
- }
- ],
- "timestamp_created": "2024-01-12 09:57:01.736800+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/223649",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1597": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 1597,
- "name": "Species-specific wiring for direction selectivity in the mammalian retina (Ding et al 2016)",
- "repository_type": "github",
- "summary": "\" ... Here we present a detailed connectomic reconstruction\r\nof SAC circuitry in mouse retina and describe two previously unknown features of synapse distributions along SAC\r\ndendrites: input and output synapses are segregated, with inputs restricted to proximal dendrites; and the distribution\r\nof inhibitory inputs is fundamentally different from that observed in rabbit retina. An anatomically constrained SAC\r\nnetwork model suggests that SAC\u2013SAC wiring differences between mouse and rabbit retina underlie distinct contributions\r\nof synaptic inhibition to velocity and contrast tuning and receptive field structure. In particular, the model indicates\r\nthat mouse connectivity enables SACs to encode lower linear velocities that account for smaller eye diameter, thereby\r\nconserving angular velocity tuning. These predictions are confirmed with calcium imaging of mouse SAC dendrites\r\nresponding to directional stimuli. ...\"",
- "tags": [
- {
- "id": 572,
- "tag": "Calcium dynamics"
- },
- {
- "id": 860,
- "tag": "Direction Selectivity"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2175,
- "tag": "ModelDB:223890"
- },
- {
- "id": 2176,
- "tag": "NeuronC (web link to model)"
- }
- ],
- "timestamp_created": "2024-01-12 09:57:02.415339+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/223890",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1598": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1598,
- "name": "Rat LGN Thalamocortical Neuron (Connelly et al 2015, 2016)",
- "repository_type": "github",
- "summary": "\" ... Here, combining data from\r\nfluorescence-targeted dendritic recordings and Ca2+ imaging from\r\nlow-threshold spiking cells in rat brain slices with computational\r\nmodeling, the cellular mechanism responsible for LTS (Low Threshold Spike) generation is\r\nestablished. ...\" \" ... Using dendritic recording, 2-photon glutamate uncaging, and\r\ncomputational modeling, we investigated how rat dorsal lateral\r\ngeniculate nucleus thalamocortical neurons integrate excitatory\r\ncorticothalamic feedback. ...\"",
- "tags": [
- {
- "id": 727,
- "tag": "Action Potential Initiation"
- },
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 579,
- "tag": "Active Dendrites"
- },
- {
- "id": 572,
- "tag": "Calcium dynamics"
- },
- {
- "id": 565,
- "tag": "Dendritic Action Potentials"
- },
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 575,
- "tag": "I T low threshold"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2177,
- "tag": "ModelDB:223891"
- },
- {
- "id": 577,
- "tag": "NEURON"
- }
- ],
- "timestamp_created": "2024-01-12 09:57:02.947083+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/223891",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1599": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1599,
- "name": "Pyramidal neurons with mutated SCN2A gene (Nav1.2) (Ben-Shalom et al 2017)",
- "repository_type": "github",
- "summary": "Model of pyramidal neurons that either hyper or hypo excitable due to SCN2A mutations. Mutations are taken from patients with ASD or Epilepsy ",
- "tags": [
- {
- "id": 2178,
- "tag": "Autism spectrum disorder"
- },
- {
- "id": 469,
- "tag": "Epilepsy"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2179,
- "tag": "ModelDB:223955"
- },
- {
- "id": 577,
- "tag": "NEURON"
- }
- ],
- "timestamp_created": "2024-01-12 09:57:03.475510+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/223955",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1600": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1600,
- "name": "Model of CA1 activity during working memory task (Spera et al. 2016)",
- "repository_type": "github",
- "summary": "\"The cellular processes underlying individual differences in the Woring Memory Capacity (WMC) of humans are essentially unknown. Psychological experiments suggest that subjects with lower working memory capacity (LWMC), with respect to subjects with higher capacity (HWMC), take more time to recall items from a list because they search through a larger set of items and are much more susceptible to interference during retrieval. ... In this paper, we investigate the possible underlying mechanisms at the single neuron level by using a computational model of hippocampal CA1 pyramidal neurons, which have been suggested to be deeply involved in the recognition of specific items. ...\"",
- "tags": [
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2180,
- "tag": "ModelDB:223962"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 794,
- "tag": "Working memory"
- }
- ],
- "timestamp_created": "2024-01-12 09:57:04.021008+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/223962",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1601": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 1601,
- "name": "Phase-locking analysis with transcranial magneto-acoustical stimulation (Yuan et al 2017)",
- "repository_type": "github",
- "summary": "\"Transcranial magneto-acoustical stimulation (TMAS) uses ultrasonic waves and a static magnetic field to generate electric current in nerve tissues for the purpose of modulating neuronal activities. It has the advantage of high spatial resolution and penetration depth. Neuronal firing rhythms carry and transmit nerve information in neural systems. In this study, we investigated the phase-locking characteristics of neuronal firing rhythms with TMAS based on the Hodgkin-Huxley neuron model. The simulation results indicate that the modulation frequency of ultrasound can affect the phase-locking behaviors. The results of this study may help us to explain the potential firing mechanism of TMAS.\"",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 734,
- "tag": "Extracellular Fields"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 1434,
- "tag": "Locking, mixed mode"
- },
- {
- "id": 767,
- "tag": "MATLAB (web link to model)"
- },
- {
- "id": 1518,
- "tag": "Magnetic stimulation"
- },
- {
- "id": 756,
- "tag": "Methods"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2181,
- "tag": "ModelDB:224843"
- }
- ],
- "timestamp_created": "2024-01-12 09:57:04.586476+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/224843",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1602": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1602,
- "name": "Impedance spectrum in cortical tissue: implications for LFP signal propagation (Miceli et al. 2017)",
- "repository_type": "github",
- "summary": "\" ... Here, we performed a detailed investigation of the frequency dependence of the conductivity within cortical tissue at microscopic distances using small current amplitudes within the typical (neuro)physiological micrometer and sub-nanoampere range. We investigated the propagation of LFPs, induced by extracellular electrical current injections via patch-pipettes, in acute rat brain slice preparations containing the somatosensory cortex in vitro using multielectrode arrays. Based on our data, we determined the cortical tissue conductivity over a 100-fold increase in signal frequency (5-500\r\nHz). Our results imply at most very weak\r\n frequency-dependent effects within the frequency range of physiological LFPs. Using biophysical modeling, we estimated the impact of different putative impedance spectra. Our results indicate that frequency dependencies of the order measured here and in most other studies have negligible impact on the typical analysis and modeling of LFP signals from extracellular brain recordings.\"",
- "tags": [
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 734,
- "tag": "Extracellular Fields"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 730,
- "tag": "I A, slow"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 589,
- "tag": "I L high threshold"
- },
- {
- "id": 739,
- "tag": "I Na,p"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 756,
- "tag": "Methods"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2182,
- "tag": "ModelDB:224923"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 620,
- "tag": "Python"
- },
- {
- "id": 569,
- "tag": "Simplified Models"
- }
- ],
- "timestamp_created": "2024-01-12 09:57:05.443538+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/224923",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1603": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 1603,
- "name": "Sloppy morphological tuning in identified neurons of the crustacean STG (Otopalik et al 2017)",
- "repository_type": "github",
- "summary": "\" ...Theoretical studies suggest that morphology is tightly tuned to minimize wiring and conduction delay of synaptic events. We utilize high-resolution confocal microscopy and custom computational tools to characterize the morphologies of four neuron types in the stomatogastric ganglion (STG) of the crab Cancer borealis. Macroscopic branching patterns and fine cable properties are variable within and across neuron types. We compare these neuronal structures to synthetic minimal spanning neurite trees constrained by a wiring cost equation and find that STG neurons do not adhere to prevailing hypotheses regarding wiring optimization principles. In this highly-modulated and oscillating circuit, neuronal structures appear to be governed by a space-filling mechanism that outweighs the cost of inefficient wiring.\"",
- "tags": [
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 570,
- "tag": "Influence of Dendritic Geometry"
- },
- {
- "id": 729,
- "tag": "Invertebrate"
- },
- {
- "id": 756,
- "tag": "Methods"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2183,
- "tag": "ModelDB:224998"
- },
- {
- "id": 743,
- "tag": "NEURON (web link to model)"
- },
- {
- "id": 853,
- "tag": "Python (web link to model)"
- }
- ],
- "timestamp_created": "2024-01-12 09:57:05.987150+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/224998",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1604": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1604,
- "name": "A model of optimal learning with redundant synaptic connections (Hiratani & Fukai 2018)",
- "repository_type": "github",
- "summary": "This is a detailed neuron model of non-parametric near-optimal latent model acquisition using multisynaptic connections between pre- and postsynaptic neurons.",
- "tags": [
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2184,
- "tag": "ModelDB:225075"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 620,
- "tag": "Python"
- },
- {
- "id": 725,
- "tag": "Synaptic Plasticity"
- }
- ],
- "timestamp_created": "2024-01-12 09:57:06.492438+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/225075",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1605": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1605,
- "name": "CA1 pyr cell: Inhibitory modulation of spatial selectivity+phase precession (Grienberger et al 2017)",
- "repository_type": "github",
- "summary": "Spatially uniform synaptic inhibition enhances spatial selectivity and temporal coding in CA1 place cells by suppressing broad out-of-field excitation.",
- "tags": [
- {
- "id": 579,
- "tag": "Active Dendrites"
- },
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 2185,
- "tag": "Feature selectivity"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2186,
- "tag": "ModelDB:225080"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 799,
- "tag": "Place cell/field"
- },
- {
- "id": 620,
- "tag": "Python"
- },
- {
- "id": 724,
- "tag": "Short-term Synaptic Plasticity"
- },
- {
- "id": 800,
- "tag": "Spatial Navigation"
- },
- {
- "id": 596,
- "tag": "Synaptic Integration"
- }
- ],
- "timestamp_created": "2024-01-12 09:57:07.031957+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/225080",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1606": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1606,
- "name": "Na+ Signals in olfactory bulb neurons (granule cell model) (Ona-Jodar et al. 2017)",
- "repository_type": "github",
- "summary": "Simulations of Na+ during action potentials in granule cells replicated the behaviors observed in experiments.",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 579,
- "tag": "Active Dendrites"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2187,
- "tag": "ModelDB:225086"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 588,
- "tag": "Olfaction"
- },
- {
- "id": 620,
- "tag": "Python"
- }
- ],
- "timestamp_created": "2024-01-12 09:57:07.581890+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/225086",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1607": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1607,
- "name": "Parallel STEPS: Large scale stochastic spatial reaction-diffusion simulat. (Chen & De Schutter 2017)",
- "repository_type": "github",
- "summary": "\" ... In this paper, we describe an MPI-based,\r\nparallel operator-splitting implementation for stochastic spatial reaction-diffusion\r\nsimulations with irregular tetrahedral meshes. The performance of our implementation\r\nis first examined and analyzed with simulations of a simple model. We then demonstrate\r\nits application to real-world research by simulating the reaction-diffusion components\r\nof a published calcium burst model in both Purkinje neuron sub-branch and full dendrite\r\nmorphologies...\"",
- "tags": [
- {
- "id": 566,
- "tag": "Bursting"
- },
- {
- "id": 572,
- "tag": "Calcium dynamics"
- },
- {
- "id": 756,
- "tag": "Methods"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2188,
- "tag": "ModelDB:225089"
- },
- {
- "id": 1919,
- "tag": "Reaction-diffusion"
- },
- {
- "id": 1574,
- "tag": "STEPS"
- }
- ],
- "timestamp_created": "2024-01-12 09:57:08.120890+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/225089",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1608": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1608,
- "name": "COREM: configurable retina simulator (Mart\u00ednez-Ca\u00f1ada et al., 2016)",
- "repository_type": "github",
- "summary": "COREM is a configurable simulator for retina modeling that has been implemented within the framework of the Human Brain Project (HBP). The software platform can be interfaced with neural simulators (e.g., NEST) to connect with models of higher visual areas and with the Neurorobotics Platform of the HBP. The code is implemented in C++ and computations of spatiotemporal equations are optimized by means of recursive filtering techniques and multithreading.\r\n\r\nMost retina simulators are more focused on fitting specific retina functions. By contrast, the versatility of COREM allows the configuration of different retina models using a set of basic retina computational primitives. We implemented a series of retina models by combining these primitives to characterize some of the best-known phenomena observed in the retina: adaptation to the mean light intensity and temporal contrast, and differential motion sensitivity.\r\n\r\nThe code has been extensively tested in Linux. The software can be also adapted to Mac OS. Installation instructions as well as the user manual can be found in the Github repository: https://github.com/pablomc88/COREM",
- "tags": [
- {
- "id": 755,
- "tag": "C or Cplusplus program"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2189,
- "tag": "ModelDB:225095"
- },
- {
- "id": 726,
- "tag": "Vision"
- }
- ],
- "timestamp_created": "2024-01-12 09:57:08.669466+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/225095",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1609": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1609,
- "name": "A spiking NN for amplification of feature-selectivity with specific connectivity (Sadeh et al 2015)",
- "repository_type": "github",
- "summary": "The model simulates large-scale inhibition-dominated spiking networks with different degrees of recurrent specific connectivity. It shows how feature-specific connectivity leads to a linear amplification of feedforward tuning, as reported in recent electrophysiological single-neuron recordings in rodent neocortex. Moreover, feature-specific connectivity leads to the emergence of feature-selective reverberating activity, and entails pattern completion in network responses.",
- "tags": [
- {
- "id": 2185,
- "tag": "Feature selectivity"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2190,
- "tag": "ModelDB:225301"
- },
- {
- "id": 611,
- "tag": "NEST"
- },
- {
- "id": 1569,
- "tag": "Orientation selectivity"
- },
- {
- "id": 853,
- "tag": "Python (web link to model)"
- },
- {
- "id": 758,
- "tag": "Sensory processing"
- }
- ],
- "timestamp_created": "2024-01-12 09:57:09.292282+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/225301",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1610": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1610,
- "name": "Effect of ionic diffusion on extracellular potentials (Halnes et al 2016)",
- "repository_type": "github",
- "summary": "\"Recorded potentials in the extracellular space (ECS) of the brain is a\r\nstandard measure of population activity in neural\r\ntissue. Computational models that simulate the relationship between\r\nthe ECS potential and its underlying neurophysiological processes are\r\ncommonly used in the interpretation of such measurements. Standard\r\nmethods, such as volume-conductor theory and current-source density\r\ntheory, assume that diffusion has a negligible effect on the ECS\r\npotential, at least in the range of frequencies picked up by most\r\nrecording systems. This assumption remains to be verified. We here\r\npresent a hybrid simulation framework that accounts for diffusive\r\neffects on the ECS potential. ...\"",
- "tags": [
- {
- "id": 734,
- "tag": "Extracellular Fields"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2191,
- "tag": "ModelDB:225311"
- },
- {
- "id": 577,
- "tag": "NEURON"
- }
- ],
- "timestamp_created": "2024-01-12 09:57:09.793845+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/225311",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1611": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 1611,
- "name": "A comparison of mathematical models of mood in bipolar disorder (Cochran et al. 2017)",
- "repository_type": "github",
- "summary": "\" ... we evaluated existing models of mood in BP (Bipolar Disorder) (...) and two new models we proposed here (...). Each model makes different assumptions about mood dynamics. Our objective was to differentiate between models using only\r\ntime courses of mood. ...\"",
- "tags": [
- {
- "id": 2192,
- "tag": "Bipolar Disorder (BP)"
- },
- {
- "id": 767,
- "tag": "MATLAB (web link to model)"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2193,
- "tag": "ModelDB:225428"
- }
- ],
- "timestamp_created": "2024-01-12 09:57:10.292993+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/225428",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1612": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 1612,
- "name": "Neuron-based control mechanisms for a robotic arm and hand (Singh et al 2017)",
- "repository_type": "github",
- "summary": "\"A robotic arm and hand controlled by simulated neurons is\r\npresented. The robot makes use of a biological neuron simulator using\r\na point neural model. ... The robot performs a simple pick-and-place\r\ntask.\r\n...\r\nAs another benefit, it is hoped that further work\r\nwill also lead to a better understanding of human and other animal\r\nneural processing, particularly for physical motion. This is a\r\nmultidisciplinary approach combining cognitive neuroscience, robotics,\r\nand psychology.\"",
- "tags": [
- {
- "id": 756,
- "tag": "Methods"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2194,
- "tag": "ModelDB:225552"
- },
- {
- "id": 1969,
- "tag": "NEST (web link to model)"
- }
- ],
- "timestamp_created": "2024-01-12 09:57:10.816053+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/225552",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1613": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 1613,
- "name": "Collection of simulated data from a thalamocortical network model (Glabska, Chintaluri, Wojcik 2017)",
- "repository_type": "github",
- "summary": "\"A major challenge in experimental data analysis\r\nis the validation of analytical methods in a fully controlled\r\nscenario where the justification of the interpretation can\r\nbe made directly and not just by plausibility.\r\n\r\n...\r\nOne solution is to use simulations of realistic\r\nmodels to generate ground truth data.\r\n\r\nIn neuroscience, creating such data requires plausible models of\r\nneural activity, access to high performance computers, expertise and\r\ntime to prepare and run the simulations, and to process the output.\r\n\r\nTo facilitate such validation tests of analytical methods we provide\r\nrich data sets including intracellular voltage traces, transmembrane\r\ncurrents, morphologies, and spike times.\r\n\r\n...\r\nThe data were generated using the\r\nlargest publicly available multicompartmental model of thalamocortical\r\nnetwork (Traub et al. 2005), with activity evoked by different thalamic stimuli.\"\r\n",
- "tags": [
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 566,
- "tag": "Bursting"
- },
- {
- "id": 469,
- "tag": "Epilepsy"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 730,
- "tag": "I A, slow"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 589,
- "tag": "I L high threshold"
- },
- {
- "id": 580,
- "tag": "I M"
- },
- {
- "id": 739,
- "tag": "I Na,p"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 575,
- "tag": "I T low threshold"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 756,
- "tag": "Methods"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2195,
- "tag": "ModelDB:225583"
- },
- {
- "id": 743,
- "tag": "NEURON (web link to model)"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 853,
- "tag": "Python (web link to model)"
- },
- {
- "id": 569,
- "tag": "Simplified Models"
- },
- {
- "id": 592,
- "tag": "Sleep"
- },
- {
- "id": 593,
- "tag": "Spindles"
- },
- {
- "id": 720,
- "tag": "Temporal Pattern Generation"
- }
- ],
- "timestamp_created": "2024-01-12 09:57:11.363969+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/225583",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1614": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1614,
- "name": "Reproducing infra-slow oscillations with dopaminergic modulation (Kobayashi et al 2017)",
- "repository_type": "github",
- "summary": "\" ... In this paper, to reproduce ISO (Infra-Slow Oscillations) in neural networks, we show that dopaminergic modulation of STDP is essential. More specifically, we discovered a close relationship between two dopaminergic effects: modulation of the STDP function and generation of ISO. We therefore, numerically investigated the relationship in detail and proposed a possible mechanism by which ISO is generated.\"",
- "tags": [
- {
- "id": 755,
- "tag": "C or Cplusplus program"
- },
- {
- "id": 749,
- "tag": "Long-term Synaptic Plasticity"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2196,
- "tag": "ModelDB:225818"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 802,
- "tag": "STDP"
- },
- {
- "id": 725,
- "tag": "Synaptic Plasticity"
- }
- ],
- "timestamp_created": "2024-01-12 09:57:11.911185+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/225818",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1615": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1615,
- "name": "High entrainment constrains synaptic depression in a globular bushy cell (Rudnicki & Hemmert 2017)",
- "repository_type": "github",
- "summary": "\" ... Here we show how different levels of synaptic depression shape firing\r\nproperties of GBCs in in vivo-like conditions using computer simulations.\r\nWe analyzed how an interplay of synaptic depression (0 % to 70 %) and the\r\nnumber of auditory nerve fiber inputs (10 to 70) contributes to the\r\nvariability of the experimental data from previous studies. ... Overall, this study helps to understand how synaptic\r\nproperties shape temporal processing in the auditory system. It also integrates,\r\ncompares, and reconciles results of various experimental studies.\"",
- "tags": [
- {
- "id": 762,
- "tag": "Audition"
- },
- {
- "id": 1511,
- "tag": "Brian (web link to method)"
- },
- {
- "id": 722,
- "tag": "Depression"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2197,
- "tag": "ModelDB:225904"
- },
- {
- "id": 743,
- "tag": "NEURON (web link to model)"
- },
- {
- "id": 853,
- "tag": "Python (web link to model)"
- },
- {
- "id": 724,
- "tag": "Short-term Synaptic Plasticity"
- },
- {
- "id": 777,
- "tag": "Spike Frequency Adaptation"
- }
- ],
- "timestamp_created": "2024-01-12 09:57:12.421809+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/225904",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1616": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1616,
- "name": "CRH modulates excitatory transmission and network physiology in hippocampus (Gunn et al. 2017)",
- "repository_type": "github",
- "summary": "This model simulates the effects of CRH on sharp waves in a rat CA1/CA3 model. It uses the frequency of the sharp waves as an output of the network.",
- "tags": [
- {
- "id": 1527,
- "tag": "Brain Rhythms"
- },
- {
- "id": 645,
- "tag": "Brian"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2198,
- "tag": "ModelDB:225906"
- },
- {
- "id": 620,
- "tag": "Python"
- }
- ],
- "timestamp_created": "2024-01-12 09:57:12.948558+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/225906",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1617": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1617,
- "name": "Dopamine neuron of the vent. periaqu. gray and dors. raphe nucleus (vlPAG/DRN) (Dougalis et al 2017)",
- "repository_type": "github",
- "summary": "The following computer model describes the electrophysiological properties of dopamine (DA) neurons of the ventrolateral periaquaductal gray and dorsal raphe nucleus (vlPAG/DRN). \r\nthe model and how to replicate Figures 7-10 of the manuscript (Dougalis et al., 2017 J Comput Neurosci).\r\n\r\nSUMMARY:\r\nWe have conducted a voltage-clamp study to provide\r\na kinetic description of major sodium, potassium and\r\ncalcium ionic currents operant on adult DA vlPAG/DRN neurons in brain slices obtained from pitx3-GFP mice. Based on experimentally derived voltage-clamp data, we then constructed a simplified, conductance-based,\r\nHodgkin and Huxley-type, computer model and validated its behaviour against in vitro neurophysiological data. Using simulations in the computational DA model, we explored the contribution of individual ionic currents in vlPAG/DRN DA neuron\u2019s spontaneous firing, pacemaker frequency and threshold for spike frequency adaptation in silico.\r\nThe data presented here extend our previous physiological characterization (Dougalis et al. 2012) and argue that DA neurons of the vlPAG/DRN express autorhythmicity in the absence of synaptic transmission via the interplay of potassium and sodium currents without the absolute need of calcium currents. The properties of the ionic currents recorded here (IH current, IA current), the lack of small oscillating potentials in the presence of sodium channel blockers taken together with the mechanisms for autorhythmicity (reliance more on sodium rather than calcium currents) also support further the idea that vlPAG/DRN DA neurons are operationally similar to VTA, rather than SNc, DA neurons. In particular, the properties of a slowly inactivating IA current in conjunction with the small and slowly activating IH current described herein pinpoint that vlPAG/DRN DA neurons are most similar to prefrontal cortex or medial shell of nucleus accumbens projecting DA neurons (see Lammel et al. 2008, 2011).",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 873,
- "tag": "Depolarization block"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 1531,
- "tag": "I Cl, leak"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 580,
- "tag": "I M"
- },
- {
- "id": 739,
- "tag": "I Na,p"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 575,
- "tag": "I T low threshold"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 567,
- "tag": "Ion Channel Kinetics"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2199,
- "tag": "ModelDB:226010"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 777,
- "tag": "Spike Frequency Adaptation"
- }
- ],
- "timestamp_created": "2024-01-12 09:57:13.500000+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/226010",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1618": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1618,
- "name": "Mechanisms underlying different onset patterns of focal seizures (Wang Y et al 2017)",
- "repository_type": "github",
- "summary": "\"Focal seizures are episodes of pathological brain activity that appear to arise from a \r\nlocalised area of the brain. The onset patterns of focal seizure activity have been studied \r\nintensively, and they have largely been distinguished into two types { low amplitude \r\nfast oscillations (LAF), or high amplitude spikes (HAS). Here we explore whether these \r\ntwo patterns arise from fundamentally different mechanisms. Here, we use a previously \r\nestablished computational model of neocortical tissue, and validate it as an adequate \r\nmodel using clinical recordings of focal seizures. We then reproduce the two onset \r\npatterns in their most defining properties and investigate the possible mechanisms \r\nunderlying the different focal seizure onset patterns in the model. ...\"\r\n",
- "tags": [
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 2042,
- "tag": "Beta oscillations"
- },
- {
- "id": 469,
- "tag": "Epilepsy"
- },
- {
- "id": 1799,
- "tag": "Gamma oscillations"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2200,
- "tag": "ModelDB:226074"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 587,
- "tag": "Spatio-temporal Activity Patterns"
- }
- ],
- "timestamp_created": "2024-01-12 09:57:14.055152+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/226074",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1619": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1619,
- "name": "VTA dopamine neuron (Tarfa, Evans, and Khaliq 2017)",
- "repository_type": "github",
- "summary": "In our model of a midbrain VTA dopamine neuron, we show that the decay kinetics of the A-type potassium current can control the timing of rebound action potentials.",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 600,
- "tag": "GENESIS"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 730,
- "tag": "I A, slow"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 589,
- "tag": "I L high threshold"
- },
- {
- "id": 721,
- "tag": "I N"
- },
- {
- "id": 1532,
- "tag": "I Na, leak"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 844,
- "tag": "I R"
- },
- {
- "id": 575,
- "tag": "I T low threshold"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 567,
- "tag": "Ion Channel Kinetics"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2201,
- "tag": "ModelDB:226254"
- }
- ],
- "timestamp_created": "2024-01-12 09:57:14.600195+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/226254",
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- "name": "Optimal balance predicts/explains amplitude and decay time of iPSGs (Kim & Fiorillo 2017)",
- "repository_type": "github",
- "summary": "\"Synaptic inhibition counterbalances excitation, but it is not known what constitutes optimal\r\ninhibition. We previously proposed that perfect balance is achieved when the peak of an\r\nexcitatory postsynaptic potential (EPSP) is exactly at spike threshold, so that the slightest\r\nvariation in excitation determines whether a spike is generated. Using simulations, we show\r\nthat the optimal inhibitory postsynaptic conductance (IPSG) increases in amplitude and\r\ndecay rate as synaptic excitation increases from 1 to 800 Hz. As further proposed by theory,\r\nwe show that optimal IPSG parameters can be learned through anti-Hebbian rules. ...\"",
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- "id": 75,
- "tag": "Homeostasis"
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- "timestamp_created": "2024-01-12 09:57:15.151577+00:00",
- "timestamp_updated": "---",
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- "summary": "A simple result of Gidon & Segev 2012 was provided where distal (off-path) inhibition is demonstrated to be more effective than proximal (on-path) inhibition in a ball and stick neuron.",
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- "id": 564,
- "tag": "ModelDB"
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- "tag": "Synaptic Integration"
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- "timestamp_created": "2024-01-12 09:57:15.701747+00:00",
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- "summary": "\" ... In this study,\r\nwe devised a simple, fast computational model that can be tailored to\r\nany cortical neuron not only for reproducing but also for predicting a\r\nvariety of spike responses to greatly fluctuating currents. The key\r\nfeatures of this model are a multi-timescale adaptive threshold\r\npredictor and a nonresetting leaky integrator. This model is capable\r\nof reproducing a rich variety of neuronal spike responses, including\r\nregular spiking, intrinsic bursting, fast spiking, and chattering, by\r\nadjusting only three adaptive threshold parameters.\r\n...\"",
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- "timestamp_created": "2024-01-12 09:57:16.237952+00:00",
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- "name": "Linking dynamics of the inhibitory network to the input structure (Komarov & Bazhenov 2016)",
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- "summary": "Code to model 10 all-to-all coupled inhibitory neurons.",
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- "summary": "\" ... In this study,\r\nwe devised a simple, fast computational model that can be tailored to\r\nany cortical neuron not only for reproducing but also for predicting a\r\nvariety of spike responses to greatly fluctuating currents. The key\r\nfeatures of this model are a multi-timescale adaptive threshold\r\npredictor and a nonresetting leaky integrator. This model is capable\r\nof reproducing a rich variety of neuronal spike responses, including\r\nregular spiking, intrinsic bursting, fast spiking, and chattering, by\r\nadjusting only three adaptive threshold parameters.\r\n...\"",
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- "timestamp_created": "2024-01-12 09:57:17.249998+00:00",
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- "name": "A model of antennal lobe of bee (Chen JY et al. 2015)",
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- "summary": "\" ... Here we use calcium imaging to reveal how responses across antennal lobe projection neurons change after association of an input odor with appetitive reinforcement. After appetitive conditioning to 1-hexanol, the representation of an odor mixture containing 1-hexanol becomes more similar to this odor and less similar to the background odor acetophenone. We then apply computational modeling to investigate how changes in synaptic connectivity can account for the observed plasticity. Our study suggests that experience-dependent modulation of inhibitory interactions in the antennal lobe aids perception of salient odor components mixed with behaviorally irrelevant background odors.\"",
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- "tag": "Learning"
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- "timestamp_created": "2024-01-12 09:57:17.751708+00:00",
- "timestamp_updated": "---",
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- "name": "Neural mass model of the sleeping cortex (Weigenand et al 2014)",
- "repository_type": "github",
- "summary": "Generates typical EEG data of sleeping Humans for sleep stages N2/N3 as well as wakefulness",
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- "timestamp_created": "2024-01-12 09:57:18.382638+00:00",
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- "name": "Neural mass model of spindle generation in the isolated thalamus (Schellenberger Costa et al. 2016)",
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- "summary": "The model generates different oscillatory patterns in the thalamus, including delta and spindle band oscillations.",
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- "tag": "Activity Patterns"
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- "id": 762,
- "tag": "Audition"
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- "tag": "I K,Ca"
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- "tag": "Oscillations"
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- "id": 592,
- "tag": "Sleep"
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- "tag": "Spindles"
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- "name": "Neural mass model of the sleeping thalamocortical system (Schellenberger Costa et al 2016)",
- "repository_type": "github",
- "summary": "This paper generates typical human EEG data of sleep stages N2/N3 as well as wakefulness and REM sleep.",
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- "name": "Neural mass model of the neocortex under sleep regulation (Costa et al 2016)",
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- "summary": "This model generates typical human EEG patterns of sleep stages N2/N3 as well as wakefulness and REM. It further contains a sleep regulatory component, that lets the model transition between those stages independently",
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- "tag": "Activity Patterns"
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- "tag": "Simplified Models"
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- "timestamp_created": "2024-01-12 09:57:20.153955+00:00",
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- "name": "5-neuron-model of neocortex for producing realistic extracellular AP shapes (Van Dijck et al. 2012)",
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- "summary": "This is a 5-neuron model of neocortex, containing one tufted layer-5 pyramidal cell, two non-tufted pyramidal cells, and two inhibitory interneurons. It was used to reproduce extracellular spike shapes in a study comparing algorithms for spike sorting and electrode selection. The neuron models are adapted from Dyhrfjeld-Johnsen et al. (2005).",
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- "tag": "GENESIS"
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- "timestamp_created": "2024-01-12 09:57:20.668612+00:00",
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- "summary": "Action potential initiation in a multi-compartmental model with cooperatively gating Na channels in the axon initial segment.\r\n",
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- "tag": "Action Potential Initiation"
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- "tag": "Action Potentials"
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- "tag": "Detailed Neuronal Models"
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- "tag": "I K"
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- "tag": "I Na,t"
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- "tag": "ModelDB"
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- "tag": "ModelDB:227005"
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- "timestamp_created": "2024-01-12 09:57:21.179952+00:00",
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- "id": 1632,
- "name": "Hotspots of dendritic spine turnover facilitates new spines and NN sparsity (Frank et al 2018) ",
- "repository_type": "github",
- "summary": "Model for the following publication: \r\n\r\nAdam C. Frank, Shan Huang, Miou Zhou, Amos Gdalyahu, George Kastellakis, Panayiota Poirazi, Tawnie K. Silva, Ximiao Wen, Joshua T. Trachtenberg, and Alcino J. Silva\r\n\r\nHotspots of Dendritic Spine Turnover Facilitate Learning-related Clustered Spine Addition and Network Sparsity\r\n",
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- "id": 579,
- "tag": "Active Dendrites"
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- "tag": "C or Cplusplus program"
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- "id": 725,
- "tag": "Synaptic Plasticity"
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- "timestamp_created": "2024-01-12 09:57:21.697931+00:00",
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- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1633": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 1633,
- "name": "Neuronify: An Educational Simulator for Neural Circuits (Dragly et al 2017)",
- "repository_type": "github",
- "summary": "\"Neuronify, a new educational software application (app) providing an interactive way of learning about\r\nneural networks, is described. Neuronify allows students with no programming experience to easily build\r\nand explore networks in a plug-and-play manner picking network elements (neurons, stimulators, recording\r\ndevices) from a menu. The app is based on the commonly used integrate-and-fire type model neuron and\r\nhas adjustable neuronal and synaptic parameters. ...\"",
- "tags": [
- {
- "id": 825,
- "tag": "Learning"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2216,
- "tag": "ModelDB:227114"
- },
- {
- "id": 2217,
- "tag": "Neuronify (web link to model)"
- },
- {
- "id": 732,
- "tag": "Tutorial/Teaching"
- }
- ],
- "timestamp_created": "2024-01-12 09:57:22.214343+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/227114",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1634": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1634,
- "name": "Discrimination on behavioral time-scales mediated by reaction-diffusion in dendrites (Bhalla 2017)",
- "repository_type": "github",
- "summary": "Sequences of events are ubiquitous in sensory, motor, and cognitive function. Key computational\r\n operations, including pattern recognition, event prediction, and plasticity, involve neural\r\n discrimination of spatio-temporal sequences. Here we show that synaptically-driven reaction\r\ndiffusion pathways on dendrites can perform sequence discrimination on behaviorally relevant\r\n time-scales. We used abstract signaling models to show that selectivity arises when inputs at\r\n successive locations are aligned with, and amplified by, propagating chemical waves triggered by\r\n previous inputs. We incorporated biological detail using sequential synaptic input onto spines in\r\n morphologically, electrically, and chemically detailed pyramidal neuronal models based on rat data.",
- "tags": [
- {
- "id": 572,
- "tag": "Calcium dynamics"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 589,
- "tag": "I L high threshold"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 1838,
- "tag": "MOOSE/PyMOOSE"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2218,
- "tag": "ModelDB:227318"
- },
- {
- "id": 719,
- "tag": "Pattern Recognition"
- },
- {
- "id": 1919,
- "tag": "Reaction-diffusion"
- },
- {
- "id": 751,
- "tag": "Signaling pathways"
- },
- {
- "id": 725,
- "tag": "Synaptic Plasticity"
- }
- ],
- "timestamp_created": "2024-01-12 09:57:22.708550+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/227318",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1635": {
- "auto_sync": true,
- "content_types": "modeling",
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- "modeling"
- ],
- "default_context": "master",
- "id": 1635,
- "name": "Cerebellar granular layer (Maex and De Schutter 1998)",
- "repository_type": "github",
- "summary": "Circuit model of the granular layer representing a one-dimensional array of single-compartmental granule cells (grcs) and Golgi cells (Gocs). This paper examines the effects of feedback inhibition (grc -> Goc -> grc) versus feedforward inhibition (mossy fibre -> Goc -> grc) on synchronization and oscillatory behaviour.",
- "tags": [
- {
- "id": 600,
- "tag": "GENESIS"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 589,
- "tag": "I L high threshold"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 747,
- "tag": "I_KD"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2219,
- "tag": "ModelDB:227363"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 586,
- "tag": "Synchronization"
- }
- ],
- "timestamp_created": "2024-01-12 09:57:23.220224+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/227363",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1636": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1636,
- "name": "Pallidostriatal projections promote beta oscillations (Corbit, Whalen, et al 2016)",
- "repository_type": "github",
- "summary": "This model consists of an inhibitory loop combining the projections from GPe neurons back to the striatum (shown experimentally to predominantly affect fast spiking interneurons, FSIs), together with the coupling from FSIs to medium spiny neurons (MSNs) in the striatum, along with the projections from MSNs to GPe. All models are in the Hodgkin-Huxley formalism, adapted from previously published models for each cell type. The connected circuit produces irregular activity under control conditions, but increasing FSI-to-MSN connectivity as observed experimentally under dopamine depletion yields exaggerated beta oscillations and synchrony. Additional mechanistic aspects are also explored.",
- "tags": [
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2220,
- "tag": "ModelDB:227577"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 586,
- "tag": "Synchronization"
- },
- {
- "id": 759,
- "tag": "XPPAUT"
- }
- ],
- "timestamp_created": "2024-01-12 09:57:23.756526+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/227577",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1637": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 1637,
- "name": "A neural mass model of cross frequency coupling (Chehelcheraghi et al 2017)",
- "repository_type": "github",
- "summary": "\"Electrophysiological signals of cortical activity show a range of possible frequency and\r\namplitude modulations, both within and across regions, collectively known as cross-frequency\r\ncoupling. To investigate whether these modulations could be considered as manifestations\r\nof the same underlying mechanism, we developed a neural mass model. The\r\nmodel provides five out of the theoretically proposed six different coupling types. ...\"",
- "tags": [
- {
- "id": 1799,
- "tag": "Gamma oscillations"
- },
- {
- "id": 767,
- "tag": "MATLAB (web link to model)"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2221,
- "tag": "ModelDB:227677"
- }
- ],
- "timestamp_created": "2024-01-12 09:57:24.236336+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/227677",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1638": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1638,
- "name": "Model for K-ATP mediated bursting in mSNc DA neurons (Knowlton et al 2018)",
- "repository_type": "github",
- "summary": "\"Burst firing in medial substantia nigra dopamine (mSN DA) neurons has been selectively linked to novelty-induced exploration behavior in mice. Burst firing in mSN DA neurons, in contrast to lateral SN DA neurons, requires functional ATP-sensitive potassium channels (K-ATP) both in vitro and in vivo. However, the precise role of K-ATP channels in promoting burst firing is un-known. We show experimentally that L-type calcium channel activity in mSN DA neurons en-hances open probability of K-ATP channels. We then generated a mathematical model to study the role of Ca2+ dynamics driving K-ATP channel function in mSN DA neurons during bursting. ...\"",
- "tags": [
- {
- "id": 795,
- "tag": "ATP-senstive potassium current"
- },
- {
- "id": 566,
- "tag": "Bursting"
- },
- {
- "id": 755,
- "tag": "C or Cplusplus program"
- },
- {
- "id": 1684,
- "tag": "Ca pump"
- },
- {
- "id": 572,
- "tag": "Calcium dynamics"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 567,
- "tag": "Ion Channel Kinetics"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2222,
- "tag": "ModelDB:227678"
- }
- ],
- "timestamp_created": "2024-01-12 09:57:24.824340+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/227678",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1639": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1639,
- "name": "Models for cortical UP-DOWN states in a bistable inhibitory-stabilized network (Jercog et al 2017)",
- "repository_type": "github",
- "summary": "In the idling brain, neuronal circuits transition between periods of sustained firing (UP state) and quiescence (DOWN state), a pattern the mechanisms of which remain unclear. We analyzed spontaneous cortical population activity from anesthetized rats and found that UP and DOWN durations were highly variable and that population rates showed no significant decay during UP periods. \r\nWe built a network rate model with excitatory (E) and inhibitory (I) populations exhibiting a novel bistable regime between a quiescent and an inhibition-stabilized state of arbitrarily low rate, where fluctuations triggered state transitions. In addition, we implemented these mechanisms in a more biophysically realistic spiking network, where DOWN-to-UP transitions are caused by synchronous high-amplitude events impinging onto the network.\r\n",
- "tags": [
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 755,
- "tag": "C or Cplusplus program"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2223,
- "tag": "ModelDB:227972"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 777,
- "tag": "Spike Frequency Adaptation"
- }
- ],
- "timestamp_created": "2024-01-12 09:57:25.368093+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/227972",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1640": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 1640,
- "name": "Phosphoinositide-Dependent Signaling in Sympathetic Neurons (SCG) (Kruse et al. 2016)",
- "repository_type": "github",
- "summary": "Phosphatidylinositol 4,5-bisphosphate [PI(4,5)P2] is a minor phospholipid in the cytoplasmic leaflet of the plasma membrane. Depletion of PI(4,5)P2 via phospholipase C-mediated hydrolysis leads to a decrease in exocytosis and alters electrical excitability in neurons. Restoration of PI(4,5)P2 is essential for a return to basal neuronal activity. However, the dynamics of phosphoinositide metabolism have not been analyzed in neurons. We studied the dynamics of phosphoinositide metabolism in sympathetic neu- rons upon muscarinic stimulation and used the kinetic information to develop a quantitative description of neuronal phospho- inositide metabolism. The measurements and analysis show a several-fold faster synthesis of PI(4,5)P2 in sympathetic neurons than in an electrically nonexcitable cell line, and provide a framework for future studies of PI(4,5)P2-dependent processes in neurons.",
- "tags": [
- {
- "id": 580,
- "tag": "I M"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2224,
- "tag": "ModelDB:227978"
- },
- {
- "id": 782,
- "tag": "Virtual Cell (web link to model)"
- }
- ],
- "timestamp_created": "2024-01-12 09:57:25.899072+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/227978",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1641": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1641,
- "name": "Nicotinic control of dopamine release in nucleus accumbens (Maex et al. 2014)",
- "repository_type": "github",
- "summary": "Minimal model of the VTA (ventral segmental area) representing two (GABA versus dopamine) neuron populations and two subtypes of nicotinic receptors (alpha4beta2 versus alpha7). The model is used to tell apart circuit from receptor mechanisms in the nicotinic control of dopamine release and its pharmacological manipulation.",
- "tags": [
- {
- "id": 841,
- "tag": "Addiction"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2225,
- "tag": "ModelDB:228337"
- },
- {
- "id": 1744,
- "tag": "Neuromodulation"
- },
- {
- "id": 787,
- "tag": "Pathophysiology"
- },
- {
- "id": 791,
- "tag": "Rate-coding model neurons"
- },
- {
- "id": 845,
- "tag": "Schizophrenia"
- },
- {
- "id": 569,
- "tag": "Simplified Models"
- },
- {
- "id": 1974,
- "tag": "Volume transmission"
- },
- {
- "id": 759,
- "tag": "XPPAUT"
- }
- ],
- "timestamp_created": "2024-01-12 09:57:26.482761+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/228337",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1642": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 1642,
- "name": "Human seizures couple across spatial scales through travelling wave dynamics (Martinet et al 2017)",
- "repository_type": "github",
- "summary": "\" ... We show that during seizure large-scale neural populations spanning centimetres of cortex coordinate with small neural groups spanning cortical columns, and provide evidence that rapidly propagating waves of activity underlie this increased inter-scale coupling. We develop a corresponding computational model to propose specific mechanisms\u2014namely, the effects of an increased extracellular potassium concentration diffusing in space\u2014that support the observed spatiotemporal dynamics. Understanding the multi-scale, spatiotemporal dynamics of human seizures\u2014and connecting these dynamics to specific biological mechanisms\u2014promises new insights to treat this devastating disease.",
- "tags": [
- {
- "id": 469,
- "tag": "Epilepsy"
- },
- {
- "id": 767,
- "tag": "MATLAB (web link to model)"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2226,
- "tag": "ModelDB:228373"
- },
- {
- "id": 587,
- "tag": "Spatio-temporal Activity Patterns"
- }
- ],
- "timestamp_created": "2024-01-12 09:57:27.060694+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/228373",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1643": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1643,
- "name": "L4 cortical barrel NN model receiving thalamic input during whisking or touch (Gutnisky et al. 2017)",
- "repository_type": "github",
- "summary": "Excitatory neurons in layer 4 (L4) in the barrel cortex respond relatively strongly to touch but not to whisker movement (Yu et al., Nat. Neurosci. 2016). The model explains the mechanism underlying this effect. The network is settled to filter out most stationary inputs. Brief touch input passes through because it takes time until feed-forward inhibition silences excitatory neurons receiving brief and strong thalamic excitation.",
- "tags": [
- {
- "id": 755,
- "tag": "C or Cplusplus program"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2227,
- "tag": "ModelDB:228596"
- },
- {
- "id": 758,
- "tag": "Sensory processing"
- },
- {
- "id": 764,
- "tag": "Touch"
- },
- {
- "id": 1507,
- "tag": "Whisking"
- }
- ],
- "timestamp_created": "2024-01-12 09:57:27.617198+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/228596",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1644": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1644,
- "name": "Firing patterns of CA3 hippocampal neurons (Soldado-Magraner et al. 2019)",
- "repository_type": "github",
- "summary": "\" ... Here we demonstrate that the intrinsic firing patterns of CA3 neurons of the rat hippocampus in vitro undergo rapid long-term plasticity in response to a few minutes of only subthreshold synaptic conditioning. This plasticity on the spike-timing could also be induced by intrasomatic injection of subthreshold depolarizing pulses and was blocked by kinase inhibitors, indicating that discharge dynamics are modulated locally. Cluster analysis of firing patterns before and after conditioning revealed systematic transitions towards adapting and intrinsic burst behaviours, irrespective of the patterns initially exhibited by the cells. We used a conductance-based model to decide appropriate pharmacological blockade, and found that the observed transitions are likely due to recruitment of low-voltage calcium and Kv7 potassium conductances. We conclude that CA3 neurons adapt their conductance profile to the subthreshold activity of their input, so that their intrinsic firing pattern is not a static signature, but rather a reflection of their history of subthreshold activity. In this way, recurrent output from CA3 neurons may collectively shape the temporal dynamics of their embedding circuits.\"",
- "tags": [
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2228,
- "tag": "ModelDB:228599"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 620,
- "tag": "Python"
- },
- {
- "id": 569,
- "tag": "Simplified Models"
- }
- ],
- "timestamp_created": "2024-01-12 09:57:28.151983+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/228599",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1645": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1645,
- "name": "Theory and simulation of integrate-and-fire neurons driven by shot noise (Droste & Lindner 2017)",
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- "summary": "This is a closed-loop respiratory control model incorporating a central pattern generator (CPG), the Butera-Rinzel-Smith (BRS) model, together with lung mechanics, oxygen handling, and chemosensory components. The closed-loop system exhibits bistability of bursting and tonic spiking. Bursting corresponds to coexistence of eupnea-like breathing, with normal minute ventilation and blood oxygen level. Tonic spiking corresponds to a tachypnea-like state, with pathologically reduced minute ventilation and critically low blood oxygen. In our paper, we use the closed-loop system to demonstrate robustness to changes in metabolic demand, spontaneous autoresuscitation in response to hypoxia, and the distinct mechanisms that underlie rhythmogenesis in the intact control circuit vs. the isolated, open-loop CPG.",
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- "name": "Distance-dependent inhibition in the hippocampus (Str\u00fcber et al. 2017)",
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- "summary": "Network model of a hippocampal circuit including interneurons and principal cells. Amplitude and decay time course of inhibitory synapses can be systematically changed for different distances between connected cells. Various forms of excitatory drives can be administered to the network including spatially structured input.",
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- "summary": "\"Connectome-based modeling of large-scale brain network dynamics enables causal in silico interrogation of the brain\u2019s\r\nstructure-function relationship, necessitating the close integration of diverse neuroinformatics fields.\r\nHere we extend the open-source simulation software The Virtual Brain to whole mouse brain network modeling\r\nbased on individual diffusion Magnetic Resonance Imaging (dMRI)-based or tracer-based detailed mouse connectomes.\r\nWe provide practical examples on how to use The Virtual Mouse Brain to simulate brain activity, such as seizure\r\npropagation and the switching behavior of the resting state dynamics in health and disease.\r\nThe Virtual Mouse Brain enables theoretically driven experimental planning and ways to test predictions in the\r\nnumerous strains of mice available to study brain function in normal and pathological conditions.\"",
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- "summary": "Code for simulating macroscopic currents of sodium channels (Nav1.1. to Nav1.9), by means of a single kinetic model. Intensity-voltage curves, normalized conductance-voltage relationship, steady-state availability and recovery from inactivation are simulated.",
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- "tag": "Coincidence Detection"
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- "summary": "\"Oscillations of neural activity emerge when many neurons repeatedly activate together and are observed in many brain regions, particularly during sleep and attention. Their functional role is still debated, but could be associated with normal cognitive processes such as memory formation or with pathologies such as schizophrenia and autism. Powerful oscillations are also a hallmark of epileptic seizures. Therefore, we wondered what mechanism could regulate oscillations. A type of neuronal coupling, called gap junctions, has been shown to promote synchronization between inhibitory neurons. Computational models show that when gap junctions are strong, neurons synchronize together. Moreover recent investigations show that the gap junction coupling strength is not static but plastic and dependent on the firing properties of the neurons. Thus, we developed a model of gap junction plasticity in a network of inhibitory and excitatory neurons. We show that gap junction plasticity can maintain the right amount of oscillations to prevent pathologies from emerging. Finally, we show that gap junction plasticity serves an additional functional role and allows for efficient and robust information transfer.\"",
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- "summary": "\" ... Based on a large body of experimental recordings from both the soma and dendrites of L5b pyramidal cells in adult rats, we characterized key features of the somatic and dendritic firing and quantified their statistics. We used these features to constrain the density of a set of ion channels over the soma and dendritic surface via multi-objective optimization with an evolutionary algorithm, thus generating a set of detailed conductance-based models that faithfully replicate the back-propagating action potential activated Ca(2+) spike firing and the perisomatic firing response to current steps, as well as the experimental variability of the properties. Furthermore, we show a useful way to analyze model parameters with our sets of models, which enabled us to identify some of the mechanisms responsible for the dynamic properties of L5b pyramidal cells as well as mechanisms that are sensitive to morphological changes. ...\"",
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- "default_context": "master",
- "id": 1658,
- "name": "Dendritic properties control energy efficiency of APs in cortical pyramidal cells (Yi et al 2017)",
- "repository_type": "github",
- "summary": "Neural computation is performed by transforming input signals into sequences of action potentials (APs), which is metabolically expensive and limited by the energy available to the brain. The energy efficiency of single AP has important consequences for the computational power of the cell, which is determined by its biophysical properties and morphologies. Here we adopt biophysically-based two-compartment models to investigate how dendrites affect energy efficiency of APs in cortical pyramidal neurons. We measure the Na+ entry during the spike and examine how it is efficiently used for generating AP depolarization. We show that increasing the proportion of dendritic area or coupling conductance between two chambers decreases Na+ entry efficiency of somatic AP. Activating inward Ca2+ current in dendrites results in dendritic spike, which increases AP efficiency. Activating Ca2+-activated outward K+ current in dendrites, however, decreases Na+ entry efficiency. We demonstrate that the active and passive dendrites take effects by altering the overlap between Na+ influx and internal current flowing from soma to dendrite. We explain a fundamental link between dendritic properties and AP efficiency, which is essential to interpret how neural computation consumes metabolic energy and how the biophysics and morphology contributes to such consumption.",
- "tags": [
- {
- "id": 727,
- "tag": "Action Potential Initiation"
- },
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 579,
- "tag": "Active Dendrites"
- },
- {
- "id": 565,
- "tag": "Dendritic Action Potentials"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2244,
- "tag": "ModelDB:230329"
- }
- ],
- "timestamp_created": "2024-01-12 09:57:35.840817+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/230329",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1659": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1659,
- "name": "Feature integration drives probabilistic behavior in Fly escape response (von Reyn et al 2017)",
- "repository_type": "github",
- "summary": "\"... A Linear Model for Visual Feature Integration in the GF (Drosophila Giant Fiber)\r\nCircuit.\r\nTo test our hypothesis that the GFs linearly integrate the separately\r\nencoded features of looming stimulus size and angular\r\nvelocity, we developed a model to predict GF membrane potential\r\nacross visual stimuli (Figure 8A). In this four-component\r\nmodel, the GFs linearly sum two excitatory components\u2014\r\nnon-LC4(Type 4 lobula columnar neurons)-mediated angular size excitation and LC4-mediated\r\nangular velocity excitation\u2014and two inhibitory components\u2014\r\nnon-LC4- and LC4-mediated angular size inhibition.\"\r\n",
- "tags": [
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2245,
- "tag": "ModelDB:230400"
- },
- {
- "id": 726,
- "tag": "Vision"
- }
- ],
- "timestamp_created": "2024-01-12 09:57:36.348974+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/230400",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1660": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1660,
- "name": "Hyperbolic model (Daneshzand et al 2017)",
- "repository_type": "github",
- "summary": "A modified Izhikevich neuron model to address the switching patterns of neuronal firing seen in Parkinson's Disease.",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2246,
- "tag": "ModelDB:230562"
- }
- ],
- "timestamp_created": "2024-01-12 09:57:36.871553+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/230562",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1661": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 1661,
- "name": "Dendrites enable a robust mechanism for neuronal stimulus selectivity (Caze et al 2017)",
- "repository_type": "github",
- "summary": "\"... Using a multi-subunit nonlinear model, we\r\ndemonstrate that stimulus selectivity can arise from the spatial\r\ndistribution of synapses. We propose this as a general mechanism for\r\ninformation processing by neurons possessing dendritic\r\ntrees. Moreover, we show that this implementation of stimulus\r\nselectivity increases the neuron's robustness to synaptic and\r\ndendritic failure. ...\"",
- "tags": [
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2247,
- "tag": "ModelDB:230578"
- },
- {
- "id": 743,
- "tag": "NEURON (web link to model)"
- },
- {
- "id": 853,
- "tag": "Python (web link to model)"
- },
- {
- "id": 2248,
- "tag": "Stimulus selectivity"
- }
- ],
- "timestamp_created": "2024-01-12 09:57:37.374282+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/230578",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1662": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1662,
- "name": "L5 PFC pyramidal neurons (Papoutsi et al. 2017)",
- "repository_type": "github",
- "summary": "\" ... Here, we use a\r\nmodeling approach to investigate whether and how the morphology of the\r\nbasal tree mediates the functional output of neurons. We implemented\r\n57 basal tree morphologies of layer 5 prefrontal pyramidal neurons of\r\nthe rat and identified morphological types which were characterized by\r\ndifferent response features, forming distinct functional types. These\r\ntypes were robust to a wide range of manipulations (distribution of\r\nactive ionic mechanisms, NMDA conductance, somatic and apical tree\r\nmorphology or the number of activated synapses) and supported\r\ndifferent temporal coding schemes at both the single neuron and the\r\nmicrocircuit level.\r\nWe predict that the basal tree morphological\r\ndiversity among neurons of the same class mediates their segregation\r\ninto distinct functional pathways.\r\n...\"",
- "tags": [
- {
- "id": 579,
- "tag": "Active Dendrites"
- },
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 589,
- "tag": "I L high threshold"
- },
- {
- "id": 721,
- "tag": "I N"
- },
- {
- "id": 739,
- "tag": "I Na,p"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 844,
- "tag": "I R"
- },
- {
- "id": 575,
- "tag": "I T low threshold"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 1433,
- "tag": "I_AHP"
- },
- {
- "id": 783,
- "tag": "I_Ks"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2249,
- "tag": "ModelDB:230811"
- },
- {
- "id": 577,
- "tag": "NEURON"
- }
- ],
- "timestamp_created": "2024-01-12 09:57:38.015575+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/230811",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1663": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1663,
- "name": "Computational analysis of NN activity and spatial reach of sharp wave-ripples (Canakci et al 2017)",
- "repository_type": "github",
- "summary": "Network oscillations of different frequencies, durations and amplitudes are hypothesized to coordinate information processing and transfer across brain areas. Among these oscillations, hippocampal sharp wave-ripple complexes (SPW-Rs) are one of the most prominent. SPW-Rs occurring in the hippocampus are suggested to play essential roles in memory consolidation as well as information transfer to the neocortex. To-date, most of the knowledge about SPW-Rs comes from experimental studies averaging responses from neuronal populations monitored by conventional microelectrodes. In this work, we investigate spatiotemporal characteristics of SPW-Rs and how microelectrode size and distance influence SPW-R recordings using a biophysical model of hippocampus. We also explore contributions from neuronal spikes and synaptic potentials to SPW-Rs based on two different types of network activity. Our study suggests that neuronal spikes from pyramidal cells contribute significantly to ripples while high amplitude sharp waves mainly arise from synaptic activity. Our simulations on spatial reach of SPW-Rs show that the amplitudes of sharp waves and ripples exhibit a steep decrease with distance from the network and this effect is more prominent for smaller area electrodes. Furthermore, the amplitude of the signal decreases strongly with increasing electrode surface area as a result of averaging. The relative decrease is more pronounced when the recording electrode is closer to the source of the activity. Through simulations of field potentials across a high-density microelectrode array, we demonstrate the importance of finding the ideal spatial resolution for capturing SPW-Rs with great sensitivity. Our work provides insights on contributions from spikes and synaptic potentials to SPW-Rs and describes the effect of measurement configuration on LFPs to guide experimental studies towards improved SPW-R recordings.",
- "tags": [
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2250,
- "tag": "ModelDB:230861"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 587,
- "tag": "Spatio-temporal Activity Patterns"
- }
- ],
- "timestamp_created": "2024-01-12 09:57:38.669176+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/230861",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1664": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1664,
- "name": "The cannula artifact (Chandler & Hodgkin 1965)",
- "repository_type": "github",
- "summary": "Chandler and Hodgkin 1965 describes how using a high impedance electrode can lead to squid axon recordings that appear to overshoot the sodium reversal potential, thus resolving controversial recordings at the time.",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 756,
- "tag": "Methods"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2251,
- "tag": "ModelDB:230888"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 732,
- "tag": "Tutorial/Teaching"
- }
- ],
- "timestamp_created": "2024-01-12 09:57:39.272379+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/230888",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1665": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 1665,
- "name": "MATLAB for brain and cognitive scientists (Cohen 2017)",
- "repository_type": "github",
- "summary": "\" ... MATLAB for Brain and Cognitive Scientists takes readers from beginning to intermediate and advanced levels of MATLAB programming, helping them gain real expertise in applications that they will use in their work.\r\n\r\nThe book offers a mix of instructive text and rigorous explanations of MATLAB code along with programming tips and tricks. The goal is to teach the reader how to program data analyses in neuroscience and psychology. Readers will learn not only how to but also how not to program, with examples of bad code that they are invited to correct or improve. Chapters end with exercises that test and develop the skills taught in each chapter. Interviews with neuroscientists and cognitive scientists who have made significant contributions to their field using MATLAB appear throughout the book. ...\"",
- "tags": [
- {
- "id": 734,
- "tag": "Extracellular Fields"
- },
- {
- "id": 767,
- "tag": "MATLAB (web link to model)"
- },
- {
- "id": 756,
- "tag": "Methods"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2252,
- "tag": "ModelDB:230929"
- },
- {
- "id": 732,
- "tag": "Tutorial/Teaching"
- }
- ],
- "timestamp_created": "2024-01-12 09:57:39.785400+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/230929",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1666": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1666,
- "name": "Conductance-based model of Layer-4 in the barrel cortex (Argaman et Golomb 2017)",
- "repository_type": "github",
- "summary": "Layer 4 in the mouse barrel cortex includes hundreds of inhibitory PV neurons and thousands of excitatory neurons. Despite this fact, its dynamical state is similar to a balanced state of large neuronal circuits.",
- "tags": [
- {
- "id": 755,
- "tag": "C or Cplusplus program"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2253,
- "tag": "ModelDB:231105"
- },
- {
- "id": 758,
- "tag": "Sensory processing"
- },
- {
- "id": 1507,
- "tag": "Whisking"
- }
- ],
- "timestamp_created": "2024-01-12 09:57:40.295574+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/231105",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1667": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1667,
- "name": "Orientation preference in L23 V1 pyramidal neurons (Park et al 2019)",
- "repository_type": "github",
- "summary": "\"Pyramidal neurons integrate synaptic inputs from basal and apical dendrites to generate stimulus-specific responses. It has been proposed that feed-forward inputs to basal dendrites drive a neuron\u2019s stimulus preference, while feedback inputs to apical dendrites sharpen selectivity. However, how a neuron\u2019s dendritic domains relate to its functional selectivity has not been demonstrated experimentally. We performed 2-photon dendritic micro-dissection on layer-2/3 pyramidal neurons in mouse primary visual cortex. We found that removing the apical dendritic tuft did not alter orientation-tuning. Furthermore, orientation-tuning curves were remarkably robust to the removal of basal dendrites: ablation of 2 basal dendrites was needed to cause a small shift in orientation preference, without significantly altering tuning width. Computational modeling corroborated our results and put limits on how orientation preferences among basal dendrites differ in order to reproduce the post-ablation data. In conclusion, neuronal orientation-tuning appears remarkably robust to loss of dendritic input.\"",
- "tags": [
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 589,
- "tag": "I L high threshold"
- },
- {
- "id": 580,
- "tag": "I M"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 575,
- "tag": "I T low threshold"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2254,
- "tag": "ModelDB:231185"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 726,
- "tag": "Vision"
- }
- ],
- "timestamp_created": "2024-01-12 09:57:40.838855+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/231185",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1668": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1668,
- "name": "CN bushy, stellate neurons (Rothman, Manis 2003) (Brian 2)",
- "repository_type": "github",
- "summary": "This model is an updated version of Romain Brette's adaptation of Rothman & Manis (2003). The model now uses Brian 2 instead of Brian 1 and can be configured to use n cells instead of a single cell. The included figure shows that Brian 2 is more efficient than Brian 1 once the number of cells exceeds 1,000.",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 645,
- "tag": "Brian"
- },
- {
- "id": 2255,
- "tag": "Brian 2"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 591,
- "tag": "I K,leak"
- },
- {
- "id": 589,
- "tag": "I L high threshold"
- },
- {
- "id": 739,
- "tag": "I Na,p"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2256,
- "tag": "ModelDB:231238"
- },
- {
- "id": 620,
- "tag": "Python"
- },
- {
- "id": 720,
- "tag": "Temporal Pattern Generation"
- }
- ],
- "timestamp_created": "2024-01-12 09:57:41.468440+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/231238",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1669": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1669,
- "name": "Development of modular activity of grid cells (Urdapilleta et al 2017)",
- "repository_type": "github",
- "summary": "This study explores the self-organization of modular activity of grid cells",
- "tags": [
- {
- "id": 755,
- "tag": "C or Cplusplus program"
- },
- {
- "id": 1461,
- "tag": "Grid cell"
- },
- {
- "id": 808,
- "tag": "Hebbian plasticity"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2257,
- "tag": "ModelDB:231392"
- },
- {
- "id": 791,
- "tag": "Rate-coding model neurons"
- }
- ],
- "timestamp_created": "2024-01-12 09:57:42.056689+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/231392",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1670": {
- "auto_sync": true,
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- "name": "Specific inhibition of dendritic plateau potential in striatal projection neurons (Du et al 2017)",
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- "summary": "We explored dendritic plateau potentials in a biophysically detailed SPN model. We coupled the dendritic plateaus to different types of inhibitions (dendritic fast and slow inhibitions, perisomatic inhibition from FS interneurons , etc.) We found the inhibition provides precise control over the plateau potential, and thus the spiking output of SPNs.",
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- {
- "id": 600,
- "tag": "GENESIS"
- },
- {
- "id": 590,
- "tag": "I A"
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- "id": 730,
- "tag": "I A, slow"
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- "id": 583,
- "tag": "I Calcium"
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- "id": 576,
- "tag": "I K"
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- "id": 581,
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- "id": 589,
- "tag": "I L high threshold"
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- "id": 739,
- "tag": "I Na,p"
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- {
- "id": 574,
- "tag": "I Na,t"
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- "id": 843,
- "tag": "I Q"
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- "id": 844,
- "tag": "I R"
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- "id": 1931,
- "tag": "Kir"
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- {
- "id": 564,
- "tag": "ModelDB"
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- "id": 2258,
- "tag": "ModelDB:231416"
- }
- ],
- "timestamp_created": "2024-01-12 09:57:42.570403+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/231416",
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- "email": "info@opensourcebrain.org",
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- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "id": 1671,
- "name": "Shaping NMDA spikes by timed synaptic inhibition on L5PC (Doron et al. 2017)",
- "repository_type": "github",
- "summary": "This work (published in \"Timed synaptic inhibition shapes NMDA spikes,\r\ninfluencing local dendritic processing\r\nand global I/O properties of cortical neurons\", Doron et al, Cell Reports, 2017), examines the effect of timed inhibition over dendritic NMDA spikes on L5PC (Based on Hay et al., 2011) and CA1 cell (Based on Grunditz et al. 2008 and Golding et al. 2001).",
- "tags": [
- {
- "id": 579,
- "tag": "Active Dendrites"
- },
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 730,
- "tag": "I A, slow"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 589,
- "tag": "I L high threshold"
- },
- {
- "id": 580,
- "tag": "I M"
- },
- {
- "id": 739,
- "tag": "I Na,p"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 575,
- "tag": "I T low threshold"
- },
- {
- "id": 594,
- "tag": "I h"
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- {
- "id": 564,
- "tag": "ModelDB"
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- "id": 2259,
- "tag": "ModelDB:231427"
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- "id": 577,
- "tag": "NEURON"
- }
- ],
- "timestamp_created": "2024-01-12 09:57:43.127268+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/231427",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "auto_sync": true,
- "content_types": "modeling",
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- "modeling"
- ],
- "default_context": "master",
- "id": 1672,
- "name": "Model for concentration invariant odor coding based on primacy hypothesis (Wilson et al 2017)",
- "repository_type": "github",
- "summary": "\"... Here we\r\npropose that, in olfaction, a small and relatively stable set\r\ncomprised of the earliest activated receptors forms a code for\r\nconcentration-invariant odor identity. One prediction of this \u201cprimacy\r\ncoding\u201d scheme is that decisions based on odor identity can be made\r\nsolely using early odor-evoked neural activity. Using an optogenetic\r\nmasking paradigm, we define the sensory integration time necessary for\r\nodor identification and demonstrate that animals can use information\r\noccurring <100ms after inhalation onset to identify odors.\r\n... We\r\npropose a computational model demonstrating how such a code can be\r\nread by neural circuits of the olfactory system.\"",
- "tags": [
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2260,
- "tag": "ModelDB:231814"
- },
- {
- "id": 588,
- "tag": "Olfaction"
- }
- ],
- "timestamp_created": "2024-01-12 09:57:43.660504+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/231814",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1673": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1673,
- "name": "Vertical system (VS) fly cells with biophysics (Dan et al 2018)",
- "repository_type": "github",
- "summary": "\"The fly visual system offers a unique opportunity to explore computations performed by single neurons. Two previous studies characterized, in vivo, the receptive field (RF) of the vertical system (VS) cells of the blowfly (calliphora vicina), both intracellularly in the axon, and, independently using Ca2+ imaging, in hundreds of distal dendritic branchlets. We integrated this information into detailed passive cable and compartmental models of 3D reconstructed VS cells. Within a given VS cell type, the transfer resistance (TR) from different branchlets to the axon differs substantially, suggesting that they contribute unequally to the shaping of the axonal RF. ...\"",
- "tags": [
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2261,
- "tag": "ModelDB:231815"
- },
- {
- "id": 577,
- "tag": "NEURON"
- }
- ],
- "timestamp_created": "2024-01-12 09:57:44.161737+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/231815",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1674": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1674,
- "name": "GC model (Beining et al 2017)",
- "repository_type": "github",
- "summary": "A companion modeldb entry (NEURON only) to modeldb accession number 231862.",
- "tags": [
- {
- "id": 1606,
- "tag": "Conductance distributions"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 591,
- "tag": "I K,leak"
- },
- {
- "id": 580,
- "tag": "I M"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 2062,
- "tag": "Kir2 leak"
- },
- {
- "id": 756,
- "tag": "Methods"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2262,
- "tag": "ModelDB:231818"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 1693,
- "tag": "Neurogenesis"
- }
- ],
- "timestamp_created": "2024-01-12 09:57:44.745711+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/231818",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "auto_sync": true,
- "content_types": "modeling",
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- "modeling"
- ],
- "default_context": "master",
- "id": 1675,
- "name": "The neuro-electronic junction (planar and engulfed electrodes) (Massobrio et al 2018)",
- "repository_type": "github",
- "summary": "Models of the neuron, planar (GP\u00b5E) and mushroom-shaped (GM\u00b5E) microelectrodes, neuro-electronic junction (microelectrode-electrolyte interface, cleft effect, and protein-glycocalyx electric double layer) are presented. Then, neuronal electrical activity is simulated by HSPICE software, and analyzed as a function of the most sensitive biophysical models parameters such as the neuron-microelectrode cleft width, spreading and seal resistances, ion-channel densities, double-layer properties, and microelectrode geometries.",
- "tags": [
- {
- "id": 2263,
- "tag": "HSPICE"
- },
- {
- "id": 756,
- "tag": "Methods"
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- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2264,
- "tag": "ModelDB:231849"
- },
- {
- "id": 2265,
- "tag": "ngspice"
- }
- ],
- "timestamp_created": "2024-01-12 09:57:45.312444+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/231849",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "1676": {
- "auto_sync": true,
- "content_types": "modeling",
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- "modeling"
- ],
- "default_context": "master",
- "id": 1676,
- "name": "Modelling the effects of short and random proto-neural elongations (de Wiljes et al 2017)",
- "repository_type": "github",
- "summary": "\"To understand how neurons and nervous systems first evolved, we need\r\nan account of the origins of neural elongations: why did neural\r\nelongations (axons and dendrites) first originate, such that they\r\ncould become the central component of both neurons and nervous\r\nsystems? Two contrasting conceptual accounts provide different answers\r\nto this question. Braitenberg's vehicles provide the iconic\r\nillustration of the dominant input-output (IO) view. Here, the basic\r\nrole of neural elongations is to connect sensors to effectors, both\r\nsituated at different positions within the body. For this function,\r\nneural elongations are thought of as comparatively long and specific\r\nconnections, which require an articulated body involving substantial\r\ndevelopmental processes to build. Internal coordination (IC) models\r\nstress a different function for early nervous systems. Here, the\r\ncoordination of activity across extended parts of a multicellular body\r\nis held central, in particular, for the contractions of (muscle)\r\ntissue. An IC perspective allows the hypothesis that the earliest\r\nproto-neural elongations could have been functional even when they\r\nwere initially simple, short and random connections, as long as they\r\nenhanced the patterning of contractile activity across a multicellular\r\nsurface. The present computational study provides a proof of concept\r\nthat such short and random neural elongations can play this\r\nrole. ...\"",
- "tags": [
- {
- "id": 2255,
- "tag": "Brian 2"
- },
- {
- "id": 2266,
- "tag": "Early evolution"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2267,
- "tag": "ModelDB:231859"
- },
- {
- "id": 620,
- "tag": "Python"
- }
- ],
- "timestamp_created": "2024-01-12 09:57:45.826013+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/231859",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1677": {
- "auto_sync": true,
- "content_types": "modeling",
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- "modeling"
- ],
- "default_context": "master",
- "id": 1677,
- "name": "Mature and young adult-born dentate granule cell models (T2N interface) (Beining et al. 2017)",
- "repository_type": "github",
- "summary": "... Here, we present T2N, a powerful\r\ninterface to control NEURON with Matlab and TREES toolbox, which\r\nsupports generating models stable over a broad range of reconstructed\r\nand synthetic morphologies. We illustrate this for a novel,\r\nhighly-detailed active model of dentate granule cells (GCs)\r\nreplicating a wide palette of experiments from various labs. By\r\nimplementing known differences in ion channel composition and\r\nmorphology, our model reproduces data from mouse or rat, mature or\r\nadult-born GCs as well as pharmacological interventions and epileptic\r\nconditions.\r\n\r\n... T2N is suitable for creating robust models useful for\r\nlarge-scale networks that could lead to novel predictions. ...\"\r\nSee modeldb accession number 231818 for NEURON only code.",
- "tags": [
- {
- "id": 1606,
- "tag": "Conductance distributions"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 591,
- "tag": "I K,leak"
- },
- {
- "id": 580,
- "tag": "I M"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 2062,
- "tag": "Kir2 leak"
- },
- {
- "id": 767,
- "tag": "MATLAB (web link to model)"
- },
- {
- "id": 756,
- "tag": "Methods"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2268,
- "tag": "ModelDB:231862"
- },
- {
- "id": 743,
- "tag": "NEURON (web link to model)"
- },
- {
- "id": 1693,
- "tag": "Neurogenesis"
- },
- {
- "id": 2269,
- "tag": "T2N (web link to model)"
- }
- ],
- "timestamp_created": "2024-01-12 09:57:46.369215+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/231862",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1678": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1678,
- "name": "Model of the cerebellar granular network (Sudhakar et al 2017)",
- "repository_type": "github",
- "summary": "\"The granular layer, which mainly consists of granule and Golgi cells, is the first stage of the cerebellar cortex and processes spatiotemporal information transmitted by mossy fiber inputs with a wide variety of firing patterns. To study its dynamics at multiple time scales in response to inputs approximating real spatiotemporal patterns, we constructed a large-scale 3D network model of the granular layer. ...\"",
- "tags": [
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 739,
- "tag": "I Na,p"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 575,
- "tag": "I T low threshold"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2270,
- "tag": "ModelDB:232023"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 587,
- "tag": "Spatio-temporal Activity Patterns"
- },
- {
- "id": 586,
- "tag": "Synchronization"
- },
- {
- "id": 822,
- "tag": "Winner-take-all"
- }
- ],
- "timestamp_created": "2024-01-12 09:57:46.969791+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/232023",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1679": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 1679,
- "name": "Behavioral time scale synaptic plasticity underlies CA1 place fields (Bittner et al. 2017)",
- "repository_type": "github",
- "summary": "\" ... Place fields could be produced\r\nin vivo in a single trial by potentiation of input that arrived seconds before and after complex\r\nspiking.The potentiated synaptic input was not initially coincident with action potentials or\r\ndepolarization.This rule, named behavioral timescale synaptic plasticity, abruptly modifies inputs\r\nthat were neither causal nor close in time to postsynaptic activation. ...\", \" ... To determine if the above plasticity rule could\r\nbe observed under more realistic model conditions,\r\nwe constructed and optimized a biophysically\r\ndetailed model and attempted to fully account\r\nfor the experimental data. ... \"",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 572,
- "tag": "Calcium dynamics"
- },
- {
- "id": 808,
- "tag": "Hebbian plasticity"
- },
- {
- "id": 825,
- "tag": "Learning"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2271,
- "tag": "ModelDB:232074"
- },
- {
- "id": 743,
- "tag": "NEURON (web link to model)"
- },
- {
- "id": 799,
- "tag": "Place cell/field"
- },
- {
- "id": 725,
- "tag": "Synaptic Plasticity"
- }
- ],
- "timestamp_created": "2024-01-12 09:57:47.493566+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/232074",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1680": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 1680,
- "name": "Dipolar extracellular potentials generated by axonal projections (McColgan et al 2017)",
- "repository_type": "github",
- "summary": "\" ... Here, we established experimentally and\r\ntheoretically that contributions of axons to EFPs can be significant. Modeling action\r\npotentials propagating along axons, we showed that EFPs were prominent in the\r\npresence of terminal zones where axons branch and terminate in close succession, as\r\nfound in many brain regions. Our models predicted a dipolar far field and a polarity\r\nreversal at the center of the terminal zone. ...\"",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2272,
- "tag": "ModelDB:232094"
- },
- {
- "id": 743,
- "tag": "NEURON (web link to model)"
- },
- {
- "id": 853,
- "tag": "Python (web link to model)"
- }
- ],
- "timestamp_created": "2024-01-12 09:57:47.988610+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/232094",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1681": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1681,
- "name": "Statistical Long-term Synaptic Plasticity (statLTSP) (Costa et al 2017)",
- "repository_type": "github",
- "summary": "In this paper we introduce a new statistical view of long-term synaptic plasticity, in which the postsynaptic responses are optimised towards a bound (or target). This in turn explains a wide range of experimental data.",
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- "id": 749,
- "tag": "Long-term Synaptic Plasticity"
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- "id": 655,
- "tag": "MATLAB"
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- "id": 2273,
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- "timestamp_created": "2024-01-12 09:57:48.473411+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/232096",
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- "id": 1682,
- "name": "2D model of olfactory bulb gamma oscillations (Li and Cleland 2017)",
- "repository_type": "github",
- "summary": "This is a biophysical model of the olfactory bulb (OB) that contains three types of neurons: mitral cells, granule cells and periglomerular cells. The model is used to study the cellular and synaptic mechanisms of OB gamma oscillations. We concluded that OB gamma oscillations can be best modeled by the coupled oscillator architecture termed pyramidal resonance inhibition network gamma (PRING).",
- "tags": [
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2274,
- "tag": "ModelDB:232097"
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- "id": 577,
- "tag": "NEURON"
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- {
- "id": 588,
- "tag": "Olfaction"
- }
- ],
- "timestamp_created": "2024-01-12 09:57:49.023834+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/232097",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- ],
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- "id": 1683,
- "name": "Zebrafish Mauthner-cell model (Watanabe et al 2017)",
- "repository_type": "github",
- "summary": "The NEURON model files encode the channel generator and firing simulator for simulating development and differentiation of the Mauthner cell (M-cell) excitability in zebrafish. The channel generator enables us to generate arbitrary Na+ and K+ channels by changing parameters of a Hodgkin-Huxley model under emulation of two-electrode voltage-clamp recordings in Xenopus oocyte system. The firing simulator simulates current-clamp recordings to generate firing patterns of the model M-cell, which are implemented with arbitrary-generated basic Na+ and K+ conductances and low-threshold K+ channels Kv7.4/KCNQ4 and sole Kv1.1 or Kv1.1 coexpressed with Kvbeta2.",
- "tags": [
- {
- "id": 566,
- "tag": "Bursting"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 580,
- "tag": "I M"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
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- "id": 769,
- "tag": "I_KHT"
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- "id": 770,
- "tag": "I_KLT"
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- "id": 567,
- "tag": "Ion Channel Kinetics"
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- {
- "id": 564,
- "tag": "ModelDB"
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- "id": 2275,
- "tag": "ModelDB:232813"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 777,
- "tag": "Spike Frequency Adaptation"
- }
- ],
- "timestamp_created": "2024-01-12 09:57:49.571909+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/232813",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
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- "username": "osbadmin"
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- "id": 1684,
- "name": "Electrical activity of the suprachiasmatic nuclei (Stinchcombe et al. 2017)",
- "repository_type": "github",
- "summary": "A network of SCN neurons coupled though GABA synapses with a light input current.",
- "tags": [
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2276,
- "tag": "ModelDB:232855"
- }
- ],
- "timestamp_created": "2024-01-12 09:57:50.135081+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/232855",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "1685": {
- "auto_sync": true,
- "content_types": "modeling",
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- ],
- "default_context": "master",
- "id": 1685,
- "name": "Basal ganglia motor function and the inverse kinematics calculation (Salimi-Badr et al 2017)",
- "repository_type": "github",
- "summary": "The computational model to study the possible correlation between Basal Ganglia (BG) function and solving the Inverse Kinematics (IK).",
- "tags": [
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2277,
- "tag": "ModelDB:232875"
- },
- {
- "id": 801,
- "tag": "Parkinson's"
- },
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- "id": 824,
- "tag": "Simulink"
- }
- ],
- "timestamp_created": "2024-01-12 09:57:50.822103+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/232875",
- "user": {
- "email": "info@opensourcebrain.org",
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- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
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- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "1686": {
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- "id": 1686,
- "name": "Thalamocortical Relay cell under current clamp in high-conductance state (Zeldenrust et al 2018)",
- "repository_type": "github",
- "summary": "Mammalian thalamocortical relay (TCR) neurons switch their firing activity between a tonic spiking and a bursting regime. In a combined experimental and computational study, we investigated the features in the input signal that single spikes and bursts in the output spike train represent and how this code is influenced by the membrane voltage state of the neuron. \r\n\r\nIdentical frozen Gaussian noise current traces were injected into TCR neurons in rat brain slices to adjust, fine-tune and validate a three-compartment TCR model cell (Destexhe et al. 1998, accession number 279). Three currents were added: an h-current (Destexhe et al. 1993,1996, accession number 3343), a high-threshold calcium current and a calcium-\r\nactivated potassium current (Huguenard & McCormick 1994, accession number 3808). \r\n\r\nThe information content carried by the various types of events in the signal as well as by the whole signal was calculated. Bursts phase-lock to and transfer information at lower frequencies than single spikes. On depolarization the neuron transits smoothly from the predominantly bursting regime to a spiking regime, in which it is more sensitive to high-frequency fluctuations. \r\n\r\nFinally, the model was used to in the more realistic \u201chigh-conductance state\u201d (Destexhe et al. 2001, accession number 8115), while being stimulated with a Poisson input (Brette et al. 2007, Vogels & Abbott 2005, accession number 83319), where fluctuations are caused by (synaptic) conductance changes instead of current injection. Under \u201cstandard\u201d conditions bursts are difficult to initiate, given the high degree of inactivation of the T-type calcium current. Strong and/or precisely timed inhibitory currents were able to remove this inactivation.\r\n",
- "tags": [
- {
- "id": 566,
- "tag": "Bursting"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 589,
- "tag": "I L high threshold"
- },
- {
- "id": 575,
- "tag": "I T low threshold"
- },
- {
- "id": 594,
- "tag": "I h"
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- "id": 1478,
- "tag": "Information transfer"
- },
- {
- "id": 564,
- "tag": "ModelDB"
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- "id": 2278,
- "tag": "ModelDB:232876"
- },
- {
- "id": 577,
- "tag": "NEURON"
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- {
- "id": 573,
- "tag": "Rebound firing"
- },
- {
- "id": 821,
- "tag": "Sensory coding"
- }
- ],
- "timestamp_created": "2024-01-12 09:57:51.481958+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/232876",
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- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
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- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "1687": {
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- "default_context": "master",
- "id": 1687,
- "name": "Smoothing of, and parameter estimation from, noisy biophysical recordings (Huys & Paninski 2009)",
- "repository_type": "github",
- "summary": "\" ... Sequential Monte Carlo (\u201cparticle filtering\u201d) methods, in combination with a detailed biophysical description of a cell, are used for principled, model-based smoothing of noisy recording data. We also provide an alternative formulation of smoothing where the neural nonlinearities are estimated in a non-parametric manner. Biophysically important parameters of detailed models (such as channel densities, intercompartmental conductances, input resistances, and observation noise) are inferred automatically from noisy data via expectation-maximisation. ...\"",
- "tags": [
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 655,
- "tag": "MATLAB"
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- "id": 756,
- "tag": "Methods"
- },
- {
- "id": 564,
- "tag": "ModelDB"
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- "id": 2279,
- "tag": "ModelDB:232913"
- },
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- "id": 568,
- "tag": "Parameter Fitting"
- }
- ],
- "timestamp_created": "2024-01-12 09:57:52.060733+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/232913",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "1688": {
- "auto_sync": true,
- "content_types": "modeling",
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- "modeling"
- ],
- "default_context": "master",
- "id": 1688,
- "name": "Modeling dendritic spikes and plasticity (Bono and Clopath 2017)",
- "repository_type": "github",
- "summary": "Biophysical model and reduced neuron model with voltage-dependent plasticity.",
- "tags": [
- {
- "id": 2255,
- "tag": "Brian 2"
- },
- {
- "id": 565,
- "tag": "Dendritic Action Potentials"
- },
- {
- "id": 564,
- "tag": "ModelDB"
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- "id": 2280,
- "tag": "ModelDB:232914"
- },
- {
- "id": 620,
- "tag": "Python"
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- {
- "id": 802,
- "tag": "STDP"
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- {
- "id": 725,
- "tag": "Synaptic Plasticity"
- }
- ],
- "timestamp_created": "2024-01-12 09:57:52.570921+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/232914",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "1689": {
- "auto_sync": true,
- "content_types": "modeling",
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- "default_context": "master",
- "id": 1689,
- "name": "A mathematical model of a neurovascular unit (Dormanns et al 2015, 2016) (Farrs & David 2011)",
- "repository_type": "github",
- "summary": "Here a lumped parameter numerical model of a neurovascular unit is presented, representing an intercellular communication system based on ion exchange through pumps and channels between neurons, astrocytes, smooth muscle cells, endothelial cells, and the spaces between these cells: the synaptic cleft between the neuron and astrocyte, the perivascular space between the astrocyte and SMC, and the extracellular space surrounding the cells. \r\nThe model contains various cellular and chemical pathways such as potassium, astrocytic calcium, and nitric oxide.\r\nThe model is able to simulate neurovascular coupling, the process characterised by an increase in neuronal activity followed by a rapid dilation of local blood vessels and hence increased blood supply providing oxygen and glucose to cells in need.",
- "tags": [
- {
- "id": 572,
- "tag": "Calcium dynamics"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 1931,
- "tag": "Kir"
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- "id": 655,
- "tag": "MATLAB"
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- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2281,
- "tag": "ModelDB:232956"
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- {
- "id": 1808,
- "tag": "Potassium buffering"
- }
- ],
- "timestamp_created": "2024-01-12 09:57:53.073003+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/232956",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1690": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1690,
- "name": "Sequential neuromodulation of Hebbian plasticity in reward-based navigation (Brzosko et al 2017)",
- "repository_type": "github",
- "summary": "\" ...Here, we\r\ndemonstrate that sequential neuromodulation of STDP by acetylcholine and dopamine offers an\r\nefficacious model of reward-based navigation. Specifically, our experimental data in mouse\r\nhippocampal slices show that acetylcholine biases STDP toward synaptic depression, whilst\r\nsubsequent application of dopamine converts this depression into potentiation. Incorporating this\r\nbidirectional neuromodulation-enabled correlational synaptic learning rule into a computational\r\nmodel yields effective navigation toward changing reward locations, as in natural foraging\r\nbehavior. ...\"",
- "tags": [
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2282,
- "tag": "ModelDB:233396"
- },
- {
- "id": 809,
- "tag": "Reinforcement Learning"
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- {
- "id": 859,
- "tag": "Reward-modulated STDP"
- }
- ],
- "timestamp_created": "2024-01-12 09:57:53.615328+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/233396",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "1691": {
- "auto_sync": true,
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- "modeling"
- ],
- "default_context": "master",
- "id": 1691,
- "name": "A unified thalamic model of multiple distinct oscillations (Li, Henriquez and Fr\u00f6hlich 2017)",
- "repository_type": "github",
- "summary": "We present a unified model of the thalamus that is capable of independently generating multiple distinct oscillations (delta, spindle, alpha and gamma oscillations) under different levels of acetylcholine (ACh) and norepinephrine (NE) modulation corresponding to different physiological conditions (deep sleep, light sleep, relaxed wakefulness and attention). The model also shows that entrainment of thalamic oscillations is state-dependent.",
- "tags": [
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 1527,
- "tag": "Brain Rhythms"
- },
- {
- "id": 755,
- "tag": "C or Cplusplus program"
- },
- {
- "id": 1799,
- "tag": "Gamma oscillations"
- },
- {
- "id": 731,
- "tag": "I CAN"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 591,
- "tag": "I K,leak"
- },
- {
- "id": 589,
- "tag": "I L high threshold"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 575,
- "tag": "I T low threshold"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 1433,
- "tag": "I_AHP"
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- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2283,
- "tag": "ModelDB:233509"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 592,
- "tag": "Sleep"
- }
- ],
- "timestamp_created": "2024-01-12 09:57:54.125478+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/233509",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1692": {
- "auto_sync": true,
- "content_types": "modeling",
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- "modeling"
- ],
- "default_context": "master",
- "id": 1692,
- "name": "Hebbian learning in a random network for PFC modeling (Lindsay, et al. 2017)",
- "repository_type": "github",
- "summary": "Creates a random model that replicates the inputs and outputs of PFC cells during a complex task. Then executes Hebbian learning in the model and performs a set of analyses on the output. A portion of this model's analysis requires code from: https://github.com/brian-lau/highdim",
- "tags": [
- {
- "id": 825,
- "tag": "Learning"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2284,
- "tag": "ModelDB:234097"
- }
- ],
- "timestamp_created": "2024-01-12 09:57:54.644417+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/234097",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1693": {
- "auto_sync": true,
- "content_types": "modeling",
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- "modeling"
- ],
- "default_context": "master",
- "id": 1693,
- "name": "Spinal circuits controlling limb coordination and gaits in quadrupeds (Danner et al 2017)",
- "repository_type": "github",
- "summary": "Simulation of spinal neural networks involved in the central control of interlimb coordination and speed-dependent gait expression in quadrupeds.",
- "tags": [
- {
- "id": 755,
- "tag": "C or Cplusplus program"
- },
- {
- "id": 739,
- "tag": "I Na,p"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2285,
- "tag": "ModelDB:234101"
- }
- ],
- "timestamp_created": "2024-01-12 09:57:55.157728+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/234101",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1694": {
- "auto_sync": true,
- "content_types": "modeling",
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- "modeling"
- ],
- "default_context": "master",
- "id": 1694,
- "name": "Calculating the consequences of left-shifted Nav channel activity in sick cells (Joos et al 2018)",
- "repository_type": "github",
- "summary": "\"Two features common to diverse sick excitable cells are \u201cleaky\u201d Nav channels and bleb damage-damaged membranes. The bleb damage, we have argued, causes a channel kinetics based \u201cleakiness.\u201d Recombinant (node of Ranvier type) Nav1.6 channels voltage-clamped in mechanically-blebbed cell-attached patches undergo a damage intensity dependent kinetic change. Specifically, they experience a coupled hyperpolarizing (left) shift of the activation and inactivation processes. The biophysical observations on Nav1.6 currents formed the basis of Nav-Coupled Left Shift (Nav-CLS) theory. Node of Ranvier excitability can be modeled with Nav-CLS imposed at varying LS intensities and with varying fractions of total nodal membrane affected. Mild damage from which sick excitable cells might recover is of most interest pathologically. Accordingly, Na+/K+ ATPase (pump) activity was included in the modeling. As we described more fully in our other recent reviews, Nav-CLS in nodes with pumps proves sufficient to predict many of the pathological excitability phenomena reported for sick excitable cells. ...\"",
- "tags": [
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 567,
- "tag": "Ion Channel Kinetics"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2286,
- "tag": "ModelDB:234111"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 740,
- "tag": "Na/K pump"
- },
- {
- "id": 620,
- "tag": "Python"
- },
- {
- "id": 732,
- "tag": "Tutorial/Teaching"
- }
- ],
- "timestamp_created": "2024-01-12 09:57:55.701729+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/234111",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1695": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1695,
- "name": "A spiking neural network model of the Lateral Geniculate Nucleus (Sen-Bhattacharya et al 2017)",
- "repository_type": "github",
- "summary": "Using Izhikevich's spiking neuron models, to build a network with a biologically informed synaptic layout emulating the Lateral Geniculate Nucleus.",
- "tags": [
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2287,
- "tag": "ModelDB:234118"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 2288,
- "tag": "SpiNNaker"
- },
- {
- "id": 720,
- "tag": "Temporal Pattern Generation"
- }
- ],
- "timestamp_created": "2024-01-12 09:57:56.228116+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/234118",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1696": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1696,
- "name": "Knox implementation of Destexhe 1998 spike and wave oscillation model (Knox et al 2018)",
- "repository_type": "github",
- "summary": "\" ...The aim of this study was to use an established thalamocortical computer model to determine how T-type calcium channels work in concert with cortical excitability to contribute to pathogenesis and treatment response in CAE.\r\n\r\nMETHODS:\r\nThe model is comprised of cortical pyramidal, cortical inhibitory, thalamocortical relay, and thalamic reticular single-compartment neurons, implemented with Hodgkin-Huxley model ion channels and connected by AMPA, GABAA , and GABAB synapses. Network behavior was simulated for different combinations of T-type calcium channel conductance, inactivation time, steady state activation/inactivation shift, and cortical GABAA conductance.\r\n\r\nRESULTS:\r\nDecreasing cortical GABAA conductance and increasing T-type calcium channel conductance converted spindle to spike and wave oscillations; smaller changes were required if both were changed in concert. In contrast, left shift of steady state voltage activation/inactivation did not lead to spike and wave oscillations, whereas right shift reduced network propensity for oscillations of any type....\"",
- "tags": [
- {
- "id": 591,
- "tag": "I K,leak"
- },
- {
- "id": 580,
- "tag": "I M"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 575,
- "tag": "I T low threshold"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2289,
- "tag": "ModelDB:234233"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 593,
- "tag": "Spindles"
- }
- ],
- "timestamp_created": "2024-01-12 09:57:56.765828+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/234233",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1697": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1697,
- "name": "Spike-timing dependent inhibitory plasticity for gating bAPs (Wilmes et al 2017)",
- "repository_type": "github",
- "summary": "\"Inhibition is known to influence the forward-directed flow of information within neurons. However, also regulation of backward-directed signals, such as backpropagating action potentials (bAPs), can enrich the functional repertoire of local circuits. Inhibitory\r\ncontrol of bAP spread, for example, can provide a switch for the plasticity of excitatory synapses. Although such a mechanism is\r\npossible, it requires a precise timing of inhibition to annihilate bAPs without impairment of forward-directed excitatory information flow. Here, we propose a specific learning rule for inhibitory synapses to automatically generate the correct timing to gate bAPs in pyramidal cells when embedded in a local circuit of feedforward inhibition. Based on computational modeling of multi-compartmental neurons with physiological properties, we demonstrate that a learning rule with anti-Hebbian shape can establish the\r\nrequired temporal precision. ...\"",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 579,
- "tag": "Active Dendrites"
- },
- {
- "id": 565,
- "tag": "Dendritic Action Potentials"
- },
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 825,
- "tag": "Learning"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2290,
- "tag": "ModelDB:234241"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 802,
- "tag": "STDP"
- },
- {
- "id": 725,
- "tag": "Synaptic Plasticity"
- }
- ],
- "timestamp_created": "2024-01-12 09:57:57.285558+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/234241",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1698": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1698,
- "name": "Basal Ganglia motor-circuit for kinematic planning of arm movements (Salimi-Badr et al 2017)",
- "repository_type": "github",
- "summary": "A mathematical model of BG for kinematic planning.",
- "tags": [
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2291,
- "tag": "ModelDB:234313"
- },
- {
- "id": 824,
- "tag": "Simulink"
- }
- ],
- "timestamp_created": "2024-01-12 09:57:57.795756+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/234313",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1699": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1699,
- "name": "Mesoscopic dynamics from AdEx recurrent networks (Zerlaut et al JCNS 2018)",
- "repository_type": "github",
- "summary": "We present a mean-field model of networks of Adaptive Exponential (AdEx) integrate-and-fire neurons, with conductance-based synaptic interactions. We study a network of regular-spiking (RS) excitatory neurons and fast-spiking (FS) inhibitory neurons. We use a Master Equation formalism, together with a semi-analytic approach to the transfer function of AdEx neurons to describe the average dynamics of the coupled populations. We compare the predictions of this mean-field model to simulated networks of RS-FS cells, first at the level of the spontaneous activity of the network, which is well predicted by the analytical description. Second, we investigate the response of the network to time-varying external input, and show that the mean-field model predicts the response time course of the population. Finally, to model VSDi signals, we consider a one-dimensional ring model made of interconnected RS-FS mean-field units.",
- "tags": [
- {
- "id": 2255,
- "tag": "Brian 2"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2292,
- "tag": "ModelDB:234992"
- },
- {
- "id": 620,
- "tag": "Python"
- },
- {
- "id": 726,
- "tag": "Vision"
- }
- ],
- "timestamp_created": "2024-01-12 09:57:58.299628+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/234992",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1700": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1700,
- "name": "A computational approach/model to explore NMDA receptors functions (Keller et al 2017)",
- "repository_type": "github",
- "summary": "\"...\r\nHere, we describe a general computational method\r\naiming at developing kinetic Markov-chain based models of NMDARs\r\nsubtypes capable of reproducing various experimental\r\nresults.\r\n\r\nThese models are then used to make predictions on\r\nadditional (non-obvious) properties and on their role in synaptic\r\nfunction under various physiological and pharmacological\r\nconditions.\r\n\r\n\r\nFor the purpose of this book chapter, we will focus\r\non the method used to develop a NMDAR model that includes\r\npharmacological site of action of different compounds. Notably,\r\nthis elementary model can subsequently be included in a neuron\r\nmodel (not described in detail here) to explore the impact of\r\ntheir differential distribution on synaptic functions.\"",
- "tags": [
- {
- "id": 567,
- "tag": "Ion Channel Kinetics"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2293,
- "tag": "ModelDB:235002"
- }
- ],
- "timestamp_created": "2024-01-12 09:57:58.837333+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/235002",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1701": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1701,
- "name": "Paradoxical effect of fAHP amplitude on gain in dentate gyrus granule cells (Jaffe & Brenner 2018)",
- "repository_type": "github",
- "summary": "The afterhyperpolarization (AHP) is canonically viewed as a major factor underlying the\r\nrefractory period, serving to limit neuronal firing rate. We recently reported (Wang et al, \r\nJ. Neurophys. 116:456, 2016) that enhancing the amplitude of the fast AHP in \r\na relatively slowly firing neuron (versus fast spiking neurons), augments neuronal excitability\r\nin dentate gyrus granule neurons expressing gain-of-function BK channels. Here we present a novel, \r\nquantitative hypothesis for how varying the amplitude of the fast AHP (fAHP) can, paradoxically, \r\ninfluence a subsequent spike tens of milliseconds later.",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 739,
- "tag": "I Na,p"
- },
- {
- "id": 575,
- "tag": "I T low threshold"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2294,
- "tag": "ModelDB:235052"
- },
- {
- "id": 577,
- "tag": "NEURON"
- }
- ],
- "timestamp_created": "2024-01-12 09:57:59.424573+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/235052",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1702": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1702,
- "name": "Sparse connectivity is required for decorrelation, pattern separation (Cayco-Gajic et al 2017)",
- "repository_type": "github",
- "summary": "\" ... To investigate the structural and functional determinants of pattern separation we built models of the cerebellar input layer with spatially correlated input patterns, and systematically varied their synaptic connectivity. ...\"",
- "tags": [
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2295,
- "tag": "ModelDB:235053"
- },
- {
- "id": 2064,
- "tag": "Pattern Separation"
- },
- {
- "id": 620,
- "tag": "Python"
- }
- ],
- "timestamp_created": "2024-01-12 09:58:00.208208+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/235053",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1703": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1703,
- "name": "Perfect Integrate and fire with noisy adaptation or fractional noise (Richard et al 2018)",
- "repository_type": "github",
- "summary": "\"Here we show that a purely Markovian integrate-and-fire (IF) model, with a noisy slow adaptation term, can generate interspike intervals (ISIs) that appear as having Long-range dependency (LRD). However a proper analysis shows that this is not the case asymptotically. For comparison, we also consider a new model of individual IF neuron with fractional (non-Markovian) noise. The correlations of its spike trains are studied and proven to have LRD, unlike classical IF models.\"",
- "tags": [
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2296,
- "tag": "ModelDB:235054"
- },
- {
- "id": 620,
- "tag": "Python"
- }
- ],
- "timestamp_created": "2024-01-12 09:58:00.745343+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/235054",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1704": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1704,
- "name": "Neuromorphic muscle spindle model (Vannucci et al 2017)",
- "repository_type": "github",
- "summary": "A fully spike-based, biologically inspired mechanism for the translation of proprioceptive feedback.",
- "tags": [
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2297,
- "tag": "ModelDB:235123"
- },
- {
- "id": 611,
- "tag": "NEST"
- },
- {
- "id": 2288,
- "tag": "SpiNNaker"
- },
- {
- "id": 593,
- "tag": "Spindles"
- }
- ],
- "timestamp_created": "2024-01-12 09:58:01.295388+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/235123",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1705": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1705,
- "name": "Robust modulation of integrate-and-fire models (Van Pottelbergh et al 2018)",
- "repository_type": "github",
- "summary": "\"By controlling the state of neuronal populations, neuromodulators ultimately affect behavior. A key neuromodulation mechanism is the alteration of neuronal excitability via the modulation of ion channel expression. This type of neuromodulation is normally studied with conductance-based models, but those models are computationally challenging for large-scale network simulations needed in population studies. This article studies the modulation properties of the multiquadratic integrate-and-fire model, a generalization of the classical quadratic integrate-and-fire model. The model is shown to combine the computational economy of integrate-and-fire modeling and the physiological interpretability of conductance-based modeling. It is therefore a good candidate for affordable computational studies of neuromodulation in large networks.\"",
- "tags": [
- {
- "id": 727,
- "tag": "Action Potential Initiation"
- },
- {
- "id": 804,
- "tag": "Bifurcation"
- },
- {
- "id": 645,
- "tag": "Brian"
- },
- {
- "id": 2255,
- "tag": "Brian 2"
- },
- {
- "id": 566,
- "tag": "Bursting"
- },
- {
- "id": 754,
- "tag": "Delay"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2298,
- "tag": "ModelDB:235138"
- },
- {
- "id": 866,
- "tag": "Multiscale"
- },
- {
- "id": 1744,
- "tag": "Neuromodulation"
- }
- ],
- "timestamp_created": "2024-01-12 09:58:01.814084+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/235138",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1706": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1706,
- "name": "Role of the AIS in the control of spontaneous frequency of dopaminergic neurons (Meza et al 2017)",
- "repository_type": "github",
- "summary": "Computational modeling showed that the\r\nsize of the Axon Initial Segment (AIS), but not its position within the somatodendritic domain, is the major causal determinant of the tonic firing rate in the intact model, by virtue of the higher intrinsic frequency of the isolated AIS. Further mechanistic analysis of the relationship between neuronal morphology and firing rate showed that dopaminergic neurons function as a coupled oscillator whose frequency of discharge results from a compromise between AIS and somatodendritic oscillators.",
- "tags": [
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 589,
- "tag": "I L high threshold"
- },
- {
- "id": 721,
- "tag": "I N"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 575,
- "tag": "I T low threshold"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2299,
- "tag": "ModelDB:235320"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 740,
- "tag": "Na/K pump"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 2236,
- "tag": "Pacemaking mechanism"
- },
- {
- "id": 720,
- "tag": "Temporal Pattern Generation"
- }
- ],
- "timestamp_created": "2024-01-12 09:58:02.339693+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/235320",
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- "id": 1707,
- "name": "Model of cerebellar parallel fiber-Purkinje cell LTD and LTP (Gallimore et al 2018)",
- "repository_type": "github",
- "summary": "Model of cerebellar parallel fiber-Purkinje cell LTD and LTP implemented in Matlab Simbiology",
- "tags": [
- {
- "id": 722,
- "tag": "Depression"
- },
- {
- "id": 825,
- "tag": "Learning"
- },
- {
- "id": 749,
- "tag": "Long-term Synaptic Plasticity"
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- "id": 2300,
- "tag": "ModelDB:235376"
- },
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- "id": 725,
- "tag": "Synaptic Plasticity"
- }
- ],
- "timestamp_created": "2024-01-12 09:58:02.917275+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/235376",
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- "last_name": "Admin",
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- "id": 1708,
- "name": "Cellular and Synaptic Mechanisms Differentiate Mitral & Superficial Tufted Cells (Jones et al 2020)",
- "repository_type": "github",
- "summary": "\"To evaluate how... different electrophysiological aspects contributed to spiking of the output MCs and sTCs, we used computational modeling. By exchanging the different cell properties in our modeled MCs and sTCs, we could evaluate each property's contribution to spiking differences between these cell types. This analysis suggested that the higher sensitivity of spiking in sTCs vs. MCs reflected both their larger monosynaptic OSN signal as well as their higher input resistance, while their smaller prolonged currents had a modest opposing effect. Taken together, our results indicate that both synaptic and intrinsic cellular features contribute to the production of parallel output channels in the olfactory bulb.\"",
- "tags": [
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2301,
- "tag": "ModelDB:267013"
- },
- {
- "id": 577,
- "tag": "NEURON"
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- "tag": "Python"
- }
- ],
- "timestamp_created": "2024-01-12 10:20:33.288720+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/267013",
- "user": {
- "email": "info@opensourcebrain.org",
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- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
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- "id": 1709,
- "name": "Efficient simulation of 3D reaction-diffusion in models of neurons (McDougal et al, 2022)",
- "repository_type": "github",
- "summary": "Validation, visualization, and analysis scripts for NEURON's 3D reaction-diffusion support.",
- "tags": [
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- "id": 756,
- "tag": "Methods"
- },
- {
- "id": 564,
- "tag": "ModelDB"
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- "id": 2302,
- "tag": "ModelDB:267018"
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- "tag": "NEURON"
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- "id": 620,
- "tag": "Python"
- },
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- "id": 1919,
- "tag": "Reaction-diffusion"
- }
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- "timestamp_created": "2024-01-12 10:20:33.903678+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/267018",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "modeling"
- ],
- "default_context": "main",
- "id": 1710,
- "name": "Grid cell-to-place cell transformation model w AD-related synaptic loss (Ness and Schultz 2021)",
- "repository_type": "github",
- "summary": "Simulation of grid-cell-to-place cell transformation with interneuron-mediated feedback inhibition, BCM learning and synaptic turnover. Generates place cell activity with stable place cell density over time. Excitatory synapse and/or inhibitory synapse loss can be implemented to analyse the effect of synaptic loss on place cell function.",
- "tags": [
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2303,
- "tag": "ModelDB:267023"
- },
- {
- "id": 620,
- "tag": "Python"
- }
- ],
- "timestamp_created": "2024-01-12 10:20:34.555604+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/267023",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
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- "auto_sync": true,
- "content_types": "modeling",
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- "modeling"
- ],
- "default_context": "main",
- "id": 1711,
- "name": "M1 and M4 intrinsically photosensitive retinal ganglion cells (Stinchcombe et al. 2021)",
- "repository_type": "github",
- "summary": "Conductance-based models of the somatic membrane voltage in M1 and M4 intrinsically photosensitive retinal ganglion cells.",
- "tags": [
- {
- "id": 1586,
- "tag": "Circadian Rhythms"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2304,
- "tag": "ModelDB:267026"
- }
- ],
- "timestamp_created": "2024-01-12 10:20:35.126627+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/267026",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1712": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 1712,
- "name": "Model for pancreatic beta-cells (Law et al. 2020)",
- "repository_type": "github",
- "summary": "This model is used to explain how chronic stimulation of pancreatic beta-cells can lead to compensation that restores calcium oscillations and electrical bursting.",
- "tags": [
- {
- "id": 566,
- "tag": "Bursting"
- },
- {
- "id": 572,
- "tag": "Calcium dynamics"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2305,
- "tag": "ModelDB:267027"
- },
- {
- "id": 759,
- "tag": "XPPAUT"
- }
- ],
- "timestamp_created": "2024-01-12 10:20:35.722588+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/267027",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1713": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 1713,
- "name": "Cortical Interneuron & Pyramidal Cell Model of Cortical Spreading Depression (Stein & Harris 2022)",
- "repository_type": "github",
- "summary": "This 2-cell cortical circuit model consists of a negative feedback loop between a single compartment pyramidal cell and a single compartment interneuron. Ion concentrations in the extra- and intracellular spaces are included in the model. The model is used to test the contribution of cortical inhibitory interneurons to the initiation of cortical spreading depression, as characterized by spike block in the pyramidal cell. Results show that interneuronal inhibition provides a wider dynamic range to the circuit and generally improves stability against spike block. Despite these beneficial effects, strong interneuronal firing contributed to rapidly changing extracellular ion concentrations, which facilitated hyperexcitation and led to spike block first in the interneuron and then in the pyramidal cell. The model results demonstrate that while the role of interneurons in cortical microcircuits is complex, they are critical to the initiation of pyramidal cell spike block and CSD. See reference below for more details.",
- "tags": [
- {
- "id": 710,
- "tag": "FORTRAN"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2306,
- "tag": "ModelDB:267033"
- },
- {
- "id": 1899,
- "tag": "Spreading depression"
- }
- ],
- "timestamp_created": "2024-01-12 10:20:36.233728+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/267033",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1714": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 1714,
- "name": "Growth Rules for Repair of Asynch Irregular Networks after Peripheral Lesions (Sinha et al 2021)",
- "repository_type": "github",
- "summary": "A model of peripheral lesions and the resulting activity-dependent rewiring in a simplified balanced cortical network model that\r\nexhibits biologically realistic Asynchronous Irregular (AI) activity, used to derive activity dependent growth rules\r\nfor different synaptic elements: dendritic and axonal.",
- "tags": [
- {
- "id": 2307,
- "tag": "Balanced networks"
- },
- {
- "id": 2308,
- "tag": "Homeostatic plasticity"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2309,
- "tag": "ModelDB:267035"
- },
- {
- "id": 611,
- "tag": "NEST"
- },
- {
- "id": 2310,
- "tag": "Neurite growth"
- },
- {
- "id": 2311,
- "tag": "Neurite loss"
- },
- {
- "id": 787,
- "tag": "Pathophysiology"
- },
- {
- "id": 2312,
- "tag": "Structural plasticity"
- }
- ],
- "timestamp_created": "2024-01-12 10:20:36.865785+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/267035",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1715": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 1715,
- "name": "PING, ING and CHING network models for Gamma oscillations in cortex (Susin and Destexhe 2021)",
- "repository_type": "github",
- "summary": "These models were published at:\r\n\r\nSusin E, Destexhe A. 2021. Integration, coincidence detection and resonance in networks of spiking neurons expressing gamma oscillations and asynchronous states. bioRxiv doi: 10.1101/2021.05.03.442436 \r\n\r\n\r\nIn this article, we constructed conductance-based network models of gamma oscillations, based on different cell types found in cerebral cortex: Regular Spiking (RS), Fast Spiking (FS) and Chattering cells. The models were adjusted to extracellular unit recordings in humans, where gamma oscillations always coexist with the asynchronous firing mode. We considered three different mechanisms to generate Gamma, first a mechanism based on the interaction between pyramidal neurons and interneurons (PING), second a mechanism in which gamma is generated in interneuron networks (ING) and third, a mechanism which relies on gamma oscillations generated by pacemaker Chattering neurons (CHING). We found that in all cases, the presence of Gamma oscillations tends to diminish the responsiveness of the networks to external inputs. We tested different paradigms and found none in which Gamma oscillations would favor information flow compared to asynchronous states.",
- "tags": [
- {
- "id": 2255,
- "tag": "Brian 2"
- },
- {
- "id": 1799,
- "tag": "Gamma oscillations"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2313,
- "tag": "ModelDB:267039"
- }
- ],
- "timestamp_created": "2024-01-12 10:20:37.389346+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/267039",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1716": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 1716,
- "name": "Leaky Integrate and Fire Neuron Model of Context Integration (Calvin, Redish 2021)",
- "repository_type": "github",
- "summary": "The maintenance of the contextual information has been shown to be sensitive to changes in excitation-inhbition (EI) balance. We constructed a multi-structure, biophysically-realistic agent that could perform context-integration as is assessed by the dot probe expectancy task. The agent included a perceptual network, a working memory network, and a decision making system and was capable of successfully performing the dot probe expectancy task. Systemic manipulation of the agent\u2019s EI balance produced localized dysfunction of the memory structure, which resulted in schizophrenia-like deficits at context integration.",
- "tags": [
- {
- "id": 718,
- "tag": "Attractor Neural Network"
- },
- {
- "id": 1532,
- "tag": "I Na, leak"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2314,
- "tag": "ModelDB:267046"
- },
- {
- "id": 620,
- "tag": "Python"
- },
- {
- "id": 794,
- "tag": "Working memory"
- }
- ],
- "timestamp_created": "2024-01-12 10:20:37.905631+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/267046",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1717": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 1717,
- "name": "Two-neuron conductance-based model with dynamic ion concentrations to study NaV1.1 channel mutations",
- "repository_type": "github",
- "summary": "Gain of function mutations of SCN1A, the gene coding for the voltage-gated sodium channel NaV1.1, cause familial hemiplegic migraine type 3 (FHM-3), whereas loss of function mutations cause different types of epilepsy. \r\n\r\nTo study those mutations, we developed a two-neuron conductance-based model of interconnected GABAergic and pyramidal glutamatergic neurons, with dynamic ion concentrations. We modeled FHM-3 mutations with persistent sodium current in the GABAergic neuron and epileptogenic mutations by decreasing the fast-inactivating sodium conductance in the GABAergic neuron.",
- "tags": [
- {
- "id": 469,
- "tag": "Epilepsy"
- },
- {
- "id": 1531,
- "tag": "I Cl, leak"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 591,
- "tag": "I K,leak"
- },
- {
- "id": 1532,
- "tag": "I Na, leak"
- },
- {
- "id": 739,
- "tag": "I Na,p"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 1433,
- "tag": "I_AHP"
- },
- {
- "id": 1685,
- "tag": "KCC2"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2315,
- "tag": "ModelDB:267047"
- },
- {
- "id": 1687,
- "tag": "NKCC1"
- },
- {
- "id": 740,
- "tag": "Na/K pump"
- },
- {
- "id": 2316,
- "tag": "Spreading depolarization"
- },
- {
- "id": 759,
- "tag": "XPPAUT"
- }
- ],
- "timestamp_created": "2024-01-12 10:20:38.434045+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/267047",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1718": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 1718,
- "name": "Reconstructed neuron (cerebellar, hippocampal, striatal) sims using predicted diameters (Reed et al)",
- "repository_type": "github",
- "summary": "Many neuron morphologies in NeuroMorpho.org do not contain accurate dendritic diameters that are needed for simulations. We used a set of archives which did have realistic morphologies to derive equations predicting dendritic diameter, and to create morphologies using the predictions.\r\nThe equations and new morphologies are derived by\r\n1. extracting morphology features from swc files (morph_feature_extract.py)\r\n2. using multiple regression to derive equations predicting diameter, (morph_feature_extract.py )\r\n3. using the equations to create the new morphology files from original swc file (shape_shifter.py).\r\nThe python programs are all available from github.com/neurord/ShapeShifter\r\nWe simulated the original morphologies and the morphologies with predicted diameter in Moose, evaluating the response to current injection and synaptic input. The code provided implements those simulations",
- "tags": [
- {
- "id": 1838,
- "tag": "MOOSE/PyMOOSE"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2317,
- "tag": "ModelDB:267048"
- }
- ],
- "timestamp_created": "2024-01-12 10:20:38.999059+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/267048",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1719": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 1719,
- "name": "Information trans. through Entopeduncular nucleus modified by synaptic plasticity (Gorodetsky et al)",
- "repository_type": "github",
- "summary": "Multicompartmental model of EP neuron was created using automatic parameter optimization. We included both short term plasticity and long term plasticity. We simulated the response to inputs from globus pallidus, striatum and subthalamic nucleus. We show that dopamine long term plasticity enhances information transmission from striatum and reduces GPe and STN information transmission.",
- "tags": [
- {
- "id": 766,
- "tag": "I CNG"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 2318,
- "tag": "IK Bkca"
- },
- {
- "id": 2319,
- "tag": "IK Skca"
- },
- {
- "id": 747,
- "tag": "I_KD"
- },
- {
- "id": 1838,
- "tag": "MOOSE/PyMOOSE"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2320,
- "tag": "ModelDB:267049"
- }
- ],
- "timestamp_created": "2024-01-12 10:20:39.587207+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/267049",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1720": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1720,
- "name": "Conditions for synaptic specificity in maintenance phase of synaptic plasticity (Huertas et al, '22)",
- "repository_type": "github",
- "summary": "Long-lasting effects on synaptic efficacies are associated with the sustained increase in concentration of specific proteins like PKM?. Assuming that the long-term maintenance of synaptic plasticity is accomplished by a molecular switch we perform simulations using the reaction-diffusion package in NEURON and analytical calculations to determine the limits of synapse specificity during maintenance.",
- "tags": [
- {
- "id": 825,
- "tag": "Learning"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2321,
- "tag": "ModelDB:267050"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 1919,
- "tag": "Reaction-diffusion"
- },
- {
- "id": 725,
- "tag": "Synaptic Plasticity"
- }
- ],
- "timestamp_created": "2024-01-12 10:20:40.186070+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/267050",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1721": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1721,
- "name": "Spinal Dorsal Horn Network Model (Medlock et al 2022)",
- "repository_type": "github",
- "summary": "To explore spinal dorsal horn (SDH) network function, we developed a computational model of the circuit that is tightly constrained by experimental data. Our model comprises conductance-based model neurons that reproduce the characteristic firing patterns of excitatory and inhibitory spinal neurons. Excitatory spinal neuron subtypes defined by calretinin, somatostatin, delta-opioid receptor, protein kinase C gamma, or vesicular glutamate transporter 3 expression or by transient/central spiking/morphology and inhibitory neuron subtypes defined by parvalbumin or dynorphin expression or by islet morphology were synaptically connected according to available qualitative data. Synaptic weights were adjusted to produce firing in projection neurons, defined by neurokinin-1 expression, matching experimentally measured responses to a range of mechanical stimulus intensities. Input to the circuit was provided by three types of afferents (A\u00df, Ad, and C-fibres) whose firing rates were also matched to experimental data.",
- "tags": [
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2322,
- "tag": "ModelDB:267056"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 659,
- "tag": "NetPyNE"
- },
- {
- "id": 2323,
- "tag": "Pain processing"
- },
- {
- "id": 758,
- "tag": "Sensory processing"
- }
- ],
- "timestamp_created": "2024-01-12 10:20:40.697357+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/267056",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1722": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1722,
- "name": "Realistic amplifier model (Ol\u00e1h et al. 2021)",
- "repository_type": "github",
- "summary": "\"... we built a model that was verified by small axonal recordings. The model accurately recreated actual action potential measurements with typical recording artefacts and predicted the native electrical behavior. The simulations verified that recording instruments substantially filter voltage recordings. Moreover, we revealed that instrumentation directly interferes with local signal generation depending on the size of the recorded structures, which complicates the interpretation of recordings from smaller structures, such as axons. However, our model offers a straightforward approach that predicts the native waveforms of fast voltage signals and the underlying conductances even from the smallest neuronal structures...\"",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2324,
- "tag": "ModelDB:267063"
- },
- {
- "id": 577,
- "tag": "NEURON"
- }
- ],
- "timestamp_created": "2024-01-12 10:20:41.282521+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/267063",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1723": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1723,
- "name": "A model of ventral Hippocampal CA1 pyramidal neurons of Tg2576 AD mice (Spoleti et al. 2021)",
- "repository_type": "github",
- "summary": "Gradual decline in cognitive and non-cognitive functions are considered clinical hallmarks of Alzheimer's Disease (AD). Post-mortem autoptic analysis shows the presence of amyloid \u00df deposits, neuroinflammation and severe brain atrophy. However, brain circuit alterations and cellular derailments, assessed in very early stages of AD, still remain elusive. The understanding of these early alterations is crucial to tackle defective mechanisms.\r\n\r\nIn a previous study we proved that the Tg2576 mouse model of AD displays functional deficits in the dorsal hippocampus and relevant behavioural AD-related alterations. We had shown that these deficits in Tg2576 mice correlate with the precocious degeneration of dopamine (DA) neurons in the Ventral Tegmental Area (VTA) and can be restored by L-DOPA treatment. Due to the distinct functionality and connectivity of dorsal versus ventral hippocampus, here we investigated neuronal excitability and synaptic functionality in the ventral CA1 hippocampal sub-region of Tg2576 mice. We found an age-dependent alteration of cell excitability and firing in pyramidal neurons starting at 3 months of age, that correlates with reduced levels in the ventral CA1 of tyrosine hydroxylase \u2013 the rate-limiting enzyme of DA synthesis. Additionally, at odds with the dorsal hippocampus, we found no alterations in basal glutamatergic transmission and long-term plasticity of ventral neurons in 8-month old Tg2576 mice compared to age-matched controls. Last, we used computational analysis to model the early derailments of firing properties observed and hypothesize that the neuronal alterations found could depend on dysfunctional sodium and potassium conductances, leading to anticipated depolarization-block of action potential firing. The present study depicts that impairment of cell excitability and homeostatic control of firing in ventral CA1 pyramidal neurons is a prodromal feature in Tg2576 AD mice.\r\n",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 827,
- "tag": "Aging/Alzheimer`s"
- },
- {
- "id": 873,
- "tag": "Depolarization block"
- },
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 2325,
- "tag": "Excitability"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 731,
- "tag": "I CAN"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 580,
- "tag": "I M"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2326,
- "tag": "ModelDB:267066"
- },
- {
- "id": 577,
- "tag": "NEURON"
- }
- ],
- "timestamp_created": "2024-01-12 10:20:41.802718+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/267066",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1724": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 1724,
- "name": "Hyperexcitability from Nav1.2 channel loss in neocortical pyramidal cells (Spratt et al 2021)",
- "repository_type": "github",
- "summary": "Based on the Layer 5 thick-tufted pyramidal cell from the Blue Brain Project, we modify the distribution of the sodium channel Nav1.2 to recapitulate an increase in excitability observed in ex vivo slice experiments.",
- "tags": [
- {
- "id": 589,
- "tag": "I L high threshold"
- },
- {
- "id": 580,
- "tag": "I M"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 575,
- "tag": "I T low threshold"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2327,
- "tag": "ModelDB:267067"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 620,
- "tag": "Python"
- }
- ],
- "timestamp_created": "2024-01-12 10:20:42.365688+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/267067",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1725": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 1725,
- "name": "Dynamics of ERK signaling pathways during L-LTP induction(Miningou et al 2021)",
- "repository_type": "github",
- "summary": "Biochemical model of five signaling pathways (3 activated by cAMP and 2 activated by calcium) leading to ERK activation during L-LTP induction. Simulations show that calcium and cAMP work synergistically to activate ERK and that stimuli given with large inter-trial intervals activate more ERK than shorter intervals. Epac and RasGRF pathways contribute to early dynamics and PKA and CaMKII contribute to late dynamics of ERK activation.",
- "tags": [
- {
- "id": 749,
- "tag": "Long-term Synaptic Plasticity"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2328,
- "tag": "ModelDB:267073"
- },
- {
- "id": 1542,
- "tag": "NeuroRD"
- },
- {
- "id": 1919,
- "tag": "Reaction-diffusion"
- },
- {
- "id": 1576,
- "tag": "Stochastic simulation"
- }
- ],
- "timestamp_created": "2024-01-12 10:20:43.025439+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/267073",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1726": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 1726,
- "name": "Interactions among kinase cascades underlying LTP in Aplysia sensory neurons (Zhang et al 2021)",
- "repository_type": "github",
- "summary": "Computational model incorporating positive and negative feedback loops of proteins in Aplysia to study \"the dynamics of kinase activity produced by different stimulus protocols and predict the critical roles of kinase interactions in the dynamics of these pathways.\"",
- "tags": [
- {
- "id": 749,
- "tag": "Long-term Synaptic Plasticity"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2329,
- "tag": "ModelDB:267086"
- },
- {
- "id": 759,
- "tag": "XPPAUT"
- }
- ],
- "timestamp_created": "2024-01-12 10:20:43.699938+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/267086",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1727": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 1727,
- "name": "Dynamics of ramping bursts in a respiratory pre-Botzinger Complex model (Abdulla et al, 2021)",
- "repository_type": "github",
- "summary": "This single-neuron model is, to the authors' knowledge, the first to capture the pre-inspiratory ramping aspects of preBotzinger Complex inspiratory neurons' activity patterns, in which relatively slow tonic spiking gradually progresses to faster spiking and a full-blown burst, with a corresponding gradual development of an underlying plateau potential. The key to this pattern is the incorporation of the dynamics of the extracellular potassium ion concentration, which is here integrated into an existing model for pre-BotC neuron bursting along with some parameter adjustments. Using fast-slow decomposition, this activity can be shown to be a form of parabolic bursting, but with burst termination at a homoclinic bifurcation rather than at a SNIC bifurcation.",
- "tags": [
- {
- "id": 566,
- "tag": "Bursting"
- },
- {
- "id": 2330,
- "tag": "Dynamic extracellular concentrations"
- },
- {
- "id": 2162,
- "tag": "I Na, slow inactivation"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2331,
- "tag": "ModelDB:267093"
- },
- {
- "id": 2332,
- "tag": "Ramping"
- },
- {
- "id": 759,
- "tag": "XPPAUT"
- }
- ],
- "timestamp_created": "2024-01-12 10:20:44.229130+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/267093",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1728": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1728,
- "name": "Look-Up Table Synapse (LUTsyn) models for AMPA and NMDA (Pham et al., 2021)",
- "repository_type": "github",
- "summary": "Fast input-output synapse model of glutamatergic receptors AMPA and NMDA that can capture nonlinear interactions via look-up table abstraction. Speeds are comparable to 'linear' exponential synapses.\r\n\r\nDownload LUT files at: https://senselab.med.yale.edu/modeldb/data/267103/LUTs.zip",
- "tags": [
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2333,
- "tag": "ModelDB:267103"
- },
- {
- "id": 866,
- "tag": "Multiscale"
- },
- {
- "id": 577,
- "tag": "NEURON"
- }
- ],
- "timestamp_created": "2024-01-12 10:20:44.755807+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/267103",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1729": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1729,
- "name": "DG adult-born granule cell: nonlinear a5-GABAARs control AP firing (Lodge et al, 2021)",
- "repository_type": "github",
- "summary": "GABA can depolarize immature neurons close to the action potential (AP) threshold in development and adult neurogenesis. Nevertheless, GABAergic synapses effectively inhibit AP firing in newborn granule cells of the adult hippocampus as early as 2 weeks post mitosis. Parvalbumin and dendrite-targeting somatostatin interneurons activate a5-subunit containing GABAA receptors (a5-GABAARs) in young neurons, which show a voltage dependent conductance profile with increasing conductance around the AP threshold. The present computational models show that the depolarized GABA reversal potential promotes NMDA receptor activation. However, the voltage-dependent conductance of a5-GABAARs in young neurons is crucial for inhibition of AP firing to generate balanced and sparse firing activity. ",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 793,
- "tag": "Development"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 842,
- "tag": "I Krp"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2334,
- "tag": "ModelDB:267106"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 1693,
- "tag": "Neurogenesis"
- },
- {
- "id": 2064,
- "tag": "Pattern Separation"
- },
- {
- "id": 596,
- "tag": "Synaptic Integration"
- }
- ],
- "timestamp_created": "2024-01-12 10:20:45.284870+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/267106",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1730": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 1730,
- "name": "The electrodiffusive neuron-extracellular-glia (edNEG) model (S\u00e6tra et al. 2021)",
- "repository_type": "github",
- "summary": "\"... We here present the electrodiffusive neuron-extracellular-glia (edNEG) model, which we believe is the first model to combine compartmental neuron modeling with an electrodiffusive framework for intra- and extracellular ion concentration dynamics in a local piece of neuro-glial brain tissue. The edNEG model (i) keeps track of all intraneuronal, intraglial, and extracellular ion concentrations and electrical potentials, (ii) accounts for action potentials and dendritic calcium spikes in neurons, (iii) contains a neuronal and glial homeostatic machinery that gives physiologically realistic ion concentration dynamics, (iv) accounts for electrodiffusive transmembrane, intracellular, and extracellular ionic movements, and (v) accounts for glial and neuronal swelling caused by osmotic transmembrane pressure gradients. The edNEG model accounts for the concentration-dependent effects on ECS potentials that the standard models neglect. Using the edNEG model, we analyze these effects by splitting the extracellular potential into three components: one due to neural sink/source configurations, one due to glial sink/source configurations, and one due to extracellular diffusive currents ...\"",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 572,
- "tag": "Calcium dynamics"
- },
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 2335,
- "tag": "Electrodiffusion"
- },
- {
- "id": 734,
- "tag": "Extracellular Fields"
- },
- {
- "id": 75,
- "tag": "Homeostasis"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 1531,
- "tag": "I Cl, leak"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 591,
- "tag": "I K,leak"
- },
- {
- "id": 1532,
- "tag": "I Na, leak"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 1433,
- "tag": "I_AHP"
- },
- {
- "id": 1685,
- "tag": "KCC2"
- },
- {
- "id": 1931,
- "tag": "Kir"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2336,
- "tag": "ModelDB:267116"
- },
- {
- "id": 1687,
- "tag": "NKCC1"
- },
- {
- "id": 738,
- "tag": "Na/Ca exchanger"
- },
- {
- "id": 740,
- "tag": "Na/K pump"
- },
- {
- "id": 1626,
- "tag": "Osmosis-driven water flux"
- }
- ],
- "timestamp_created": "2024-01-12 10:20:45.853205+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/267116",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1731": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 1731,
- "name": "Switching circuit for optimal context integration during static + moving contexts (Voina et al 2022)",
- "repository_type": "github",
- "summary": "The brain processes information at all times and much of that information is context-dependent.The visual system presents an important example: processing is ongoing, but the context changes dramatically when an animal is still vs. running. How is context-dependent information processing achieved? We take inspiration from recent neurophysiology studies on the role of distinct cell types in primary visual cortex (V1). We find that relatively few \u201cswitching units\u201d \u2014 akin to the VIP neuron type in V1 in that they turn on and off in the running vs. still context and have connections to and from the main population \u2014 are sufficient to drive context dependent image processing. We demonstrate this in a model of feature integration and in a test of image denoising. The underlying circuit architecture illustrates a concrete computational role for the multiple cell types under increasing study across the brain, and may inspire more flexible neurally inspired computing architectures.",
- "tags": [
- {
- "id": 855,
- "tag": "Connectivity matrix"
- },
- {
- "id": 2337,
- "tag": "Context integration"
- },
- {
- "id": 860,
- "tag": "Direction Selectivity"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2338,
- "tag": "ModelDB:267120"
- },
- {
- "id": 1569,
- "tag": "Orientation selectivity"
- },
- {
- "id": 620,
- "tag": "Python"
- },
- {
- "id": 2339,
- "tag": "Receptive field"
- },
- {
- "id": 2248,
- "tag": "Stimulus selectivity"
- }
- ],
- "timestamp_created": "2024-01-12 10:20:46.420534+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/267120",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1732": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 1732,
- "name": "Layer-specific pyramidal cell props underlie diverse ACC motor + limbic networks (Medalla et al '21)",
- "repository_type": "github",
- "summary": "\"A MATLAB-based model of pyramidal-interneuron network was extended from [modeldb.yale.edu/138421]... to simulate how intrinsic biophysical properties and inhibition can affect network synchrony and oscillatory frequencies in ACC L3 and L5... Four different networks were simulated depending on a subset of empirically derived biophysical, morphological and connectional properties of lamina- and target- specific ACC pyramidal neurons... our model is constrained by in vitro whole cell patch clamp recording data from the soma.\"",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2340,
- "tag": "ModelDB:267128"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 777,
- "tag": "Spike Frequency Adaptation"
- }
- ],
- "timestamp_created": "2024-01-12 10:20:46.950951+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/267128",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
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- "auto_sync": true,
- "content_types": "modeling",
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- "modeling"
- ],
- "default_context": "main",
- "id": 1733,
- "name": "Resurgent sodium transient current in zebra finch RA (Zemel et al., 2021)",
- "repository_type": "github",
- "summary": "RA projection neurons in zebra finches display different levels of resurgent INa through development. This work reports that projection neurons in the adult zebra finch song nucleus RA display: 1) robust high-frequency firing, 2) ultra-short half-width spike waveforms, 3) superfast Na+ current inactivation kinetics and 4) large resurgent Na+ currents (INaR). Dynamic clamping provides evidence of INaR role in neuronal excitability. The model is composed by one gate with an activating and one inactivating particle which describe a transient inward current triggered by neuronal depolarization.",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 820,
- "tag": "IGOR Pro"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2341,
- "tag": "ModelDB:267132"
- },
- {
- "id": 1966,
- "tag": "Motor control"
- }
- ],
- "timestamp_created": "2024-01-12 10:20:47.485736+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/267132",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1734": {
- "auto_sync": true,
- "content_types": "modeling",
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- "modeling"
- ],
- "default_context": "main",
- "id": 1734,
- "name": "The electrodiffusive Pinsky-Rinzel (edPR) model (S\u00e6tra et al., 2020)",
- "repository_type": "github",
- "summary": "The edPR model is \"what we may refer to as \u201ca minimal neuronal model that\r\nhas it all\u201d. By \u201chas it all\u201d, we mean that it (1) has a spatial extension, (2) considers both extracellular- and \r\nintracellular dynamics, (3) keeps track of all ion concentrations (Na+, K+, Ca2+, and\r\nCl-) in all compartments, (4) keeps track of all electrical potentials in all compartments, \r\n(5) has differential expression of ion channels in soma versus dendrites, \r\nand can fire somatic APs and dendritic calcium spikes, \r\n(6) contains the homeostatic machinery that ensures that it maintains a realistic dynamics in the membrane potential\r\nand all ion concentrations during long-time activity, and (7) accounts for transmembrane,\r\nintracellular and extracellular ionic movements due to both diffusion and electrical migration,\r\nand thus ensures a consistent relationship between ion concentrations and electrical charge.\r\nBeing based on a unified framework for intra- and extracellular dynamics, the model\r\nthus accounts for possible ephaptic effects from extracellular dynamics, as neglected in \r\nstandard feedforward models based on volume conductor theory. By \u201cminimal\u201d\r\nwe simply mean that we reduce the number of spatial compartments to the minimal, which in\r\nthis case is four, i.e., two neuronal compartments (a soma and a dendrite), plus two extracellular \r\ncompartments (outside soma and outside dendrite). Technically, the model was \r\nconstructed by adding homeostatic mechanisms and ion concentration dynamics to an existing\r\nmodel, i.e., the two-compartment Pinsky-Rinzel (PR) model, and embedding in it a \r\nconsistent electrodiffusive framework, i.e., the previously developed Kirchhoff-Nernst-Planck framework.\"",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 873,
- "tag": "Depolarization block"
- },
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 2335,
- "tag": "Electrodiffusion"
- },
- {
- "id": 75,
- "tag": "Homeostasis"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 1531,
- "tag": "I Cl, leak"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 591,
- "tag": "I K,leak"
- },
- {
- "id": 1532,
- "tag": "I Na, leak"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 1433,
- "tag": "I_AHP"
- },
- {
- "id": 1685,
- "tag": "KCC2"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2342,
- "tag": "ModelDB:267139"
- },
- {
- "id": 1687,
- "tag": "NKCC1"
- },
- {
- "id": 738,
- "tag": "Na/Ca exchanger"
- },
- {
- "id": 740,
- "tag": "Na/K pump"
- },
- {
- "id": 620,
- "tag": "Python"
- }
- ],
- "timestamp_created": "2024-01-12 10:20:48.072686+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/267139",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1735": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1735,
- "name": "Long-Term Inactivation of Na+ Channels as a Mech of Adaptation in CA1 Pyr Cells (Upchurch et al '22)",
- "repository_type": "github",
- "summary": "\"... Ramps were applied to CA1 pyramidal neurons from male rats in vitro (slice electrophysiology) and in silico (multi-compartmental NEURON model). Under control conditions, CA1 neurons fired more action potentials at higher frequencies on the up-ramp versus the down-ramp. This effect was more pronounced for dendritic compared to somatic ramps. We incorporated a four-state Markov scheme for NaV1.6 channels into our model and calibrated the spatial dependence of long-term inactivation according to the literature; this spatial dependence was sufficient to explain the difference in dendritic versus somatic ramps. Long-term inactivation reduced the firing frequency by decreasing open-state occupancy, and reduced spike amplitude during trains by decreasing occupancy in closed states, which comprise the available pool...\"",
- "tags": [
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 589,
- "tag": "I L high threshold"
- },
- {
- "id": 580,
- "tag": "I M"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 844,
- "tag": "I R"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 575,
- "tag": "I T low threshold"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 747,
- "tag": "I_KD"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2343,
- "tag": "ModelDB:267140"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 799,
- "tag": "Place cell/field"
- }
- ],
- "timestamp_created": "2024-01-12 10:20:48.639850+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/267140",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1736": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1736,
- "name": "Spatial constrains of GABAergic rheobase shift (Lombardi et al., 2021)",
- "repository_type": "github",
- "summary": "In this models we investigated how the threshold eGABA, at which GABAergic inhibition switches to excitation, depends on the spatiotemporal constrains in a ball-and-stick neurons and a neurons with a topology derived from an reconstructed neuron.",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 793,
- "tag": "Development"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2344,
- "tag": "ModelDB:267142"
- },
- {
- "id": 577,
- "tag": "NEURON"
- }
- ],
- "timestamp_created": "2024-01-12 10:20:49.300452+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/267142",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1737": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 1737,
- "name": "Long- and short-term history effects in a spiking network model of statistical learning (Maes et al accepted)",
- "repository_type": "github",
- "summary": "We map inverse transform learning onto spiking networks. We show that the model manages to learn from repeated observations of a variable and samples from the target distribution during spontaneous dynamics.",
- "tags": [
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2345,
- "tag": "ModelDB:267144"
- }
- ],
- "timestamp_created": "2024-01-12 10:20:49.822107+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/267144",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1738": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 1738,
- "name": "Active intrinsic conductances in networks, transients, activity, plasticity (Akosy and Shouval 2021)",
- "repository_type": "github",
- "summary": "\"... we show that by including a small number of additional active conductances we can produce recurrent networks that are both more robust and exhibit firing-rate statistics that are more consistent with experimental results. We show that this holds both for bi-stable recurrent networks, which are thought to underlie working memory and for slowly decaying networks which might underlie the estimation of interval timing. We also show that by including these conductances, such networks can be trained to using a simple learning rule to predict temporal intervals that are an order of magnitude larger than those that can be trained in networks of leaky integrate and fire neurons.\"",
- "tags": [
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2346,
- "tag": "ModelDB:267145"
- }
- ],
- "timestamp_created": "2024-01-12 10:20:50.476433+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/267145",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1739": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1739,
- "name": "Central Nervous System tadpole model in Matlab and NEURON-Python (Ferrario et al, 2021)",
- "repository_type": "github",
- "summary": "This is the source code for three compuational models used for generating connectivity and swimming dynamics of spinal cord and hindbrain neurons in the Xenopus tadpoles using biological data. The model reproduces the initiation, continuation, termination and accelaration of forward swimming.",
- "tags": [
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2347,
- "tag": "ModelDB:267146"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 620,
- "tag": "Python"
- }
- ],
- "timestamp_created": "2024-01-12 10:20:51.105699+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/267146",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1740": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 1740,
- "name": "Initiation of spreading depolarization by GABAergic neuron hyperactivity & NaV 1.1 (Chever et al 21)",
- "repository_type": "github",
- "summary": "Experimentally, we show that acute pharmacological activation of NaV1.1 (the main Na+ channel of interneurons) or optogenetic-induced hyperactivity of GABAergic interneurons is sufficient to ignite CSD in the neocortex by spiking-generated extracellular K+ build-up. Neither GABAergic nor glutamatergic synaptic transmission were required for CSD initiation. CSD was not generated in other brain areas, suggesting that this is a neocortex-specific mechanism of CSD initiation. Gain-of-function mutations of NaV1.1 (SCN1A) cause Familial Hemiplegic Migraine type-3 (FHM3), a subtype of migraine with aura, of which CSD is the neurophysiological correlate. Our results provide the mechanism linking NaV1.1 gain-of-function to CSD generation in FHM3.\r\n\r\nThose findings are supported by the two-neuron conductance-based model with dynamic ion concentrations we developed.",
- "tags": [
- {
- "id": 2330,
- "tag": "Dynamic extracellular concentrations"
- },
- {
- "id": 1531,
- "tag": "I Cl, leak"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 591,
- "tag": "I K,leak"
- },
- {
- "id": 1532,
- "tag": "I Na, leak"
- },
- {
- "id": 739,
- "tag": "I Na,p"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 1433,
- "tag": "I_AHP"
- },
- {
- "id": 1685,
- "tag": "KCC2"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2348,
- "tag": "ModelDB:267157"
- },
- {
- "id": 1687,
- "tag": "NKCC1"
- },
- {
- "id": 740,
- "tag": "Na/K pump"
- },
- {
- "id": 2316,
- "tag": "Spreading depolarization"
- },
- {
- "id": 759,
- "tag": "XPPAUT"
- }
- ],
- "timestamp_created": "2024-01-12 10:20:51.684177+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/267157",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1741": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 1741,
- "name": "Accelerating with FlyBrainLab discovery of the functional logic of Drosophila brain (Lazar et al 21)",
- "repository_type": "github",
- "summary": "In recent years, a wealth of Drosophila neuroscience data have become available including cell type and connectome/synaptome datasets for both the larva and adult fly. To facilitate integration across data modalities and to accelerate the understanding of the functional logic of the fruit fly brain, we have developed FlyBrainLab, a unique open-source computing platform that integrates 3D exploration and visualization of diverse datasets with interactive exploration of the functional logic of modeled executable brain circuits. FlyBrainLab\u2019s User Interface, Utilities Libraries and Circuit Libraries bring together neuroanatomical, neurogenetic and electrophysiological datasets with computational models of different researchers for validation and comparison within the same platform. Seeking to transcend the limitations of the connectome/synaptome, FlyBrainLab also provides libraries for molecular transduction arising in sensory coding in vision/olfaction. Together with sensory neuron activity data, these libraries serve as entry points for the exploration, analysis, comparison, and evaluation of circuit functions of the fruit fly brain.",
- "tags": [
- {
- "id": 756,
- "tag": "Methods"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2349,
- "tag": "ModelDB:267165"
- }
- ],
- "timestamp_created": "2024-01-12 10:20:52.305411+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/267165",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1742": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 1742,
- "name": "Locus Coeruleus blocking model (Chowdhury et al.)",
- "repository_type": "github",
- "summary": "\"... Here, we show that Locus Coeruleus (LC) cells projecting to dCA1 have a key permissive role in contextual memory linking, without affecting contextual memory formation, and that this effect is mediated by dopamine. Additionally, we found that LC to dCA1 projecting neurons modulate the excitability of dCA1 neurons, and the extent of overlap between dCA1 memory ensembles, as well as the stability of coactivity patterns within these ensembles...\"",
- "tags": [
- {
- "id": 755,
- "tag": "C or Cplusplus program"
- },
- {
- "id": 572,
- "tag": "Calcium dynamics"
- },
- {
- "id": 2325,
- "tag": "Excitability"
- },
- {
- "id": 808,
- "tag": "Hebbian plasticity"
- },
- {
- "id": 749,
- "tag": "Long-term Synaptic Plasticity"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2350,
- "tag": "ModelDB:267173"
- },
- {
- "id": 620,
- "tag": "Python"
- },
- {
- "id": 2351,
- "tag": "Synaptic Tagging and Capture"
- }
- ],
- "timestamp_created": "2024-01-12 10:20:52.847213+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/267173",
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- "summary": "Knowledge of motor cortex connectivity is of great value in cognitive neuroscience, in order to provide a better understanding of motor organization and its alterations in pathological conditions. Traditional methods provide connectivity estimations which may vary depending on the task. This work aims to propose a new method for motor connectivity assessment based on the hypothesis of a task-independent connectivity network, assuming nonlinear behavior. The model considers six cortical regions of interest (ROIs) involved in hand movement. The dynamics of each region is simulated using a neural mass model, which reproduces the oscillatory activity through the interaction among four neural populations. Parameters of the model have been assigned to simulate both power spectral densities and coherences of a patient with left-hemisphere stroke during: resting condition, movement of the affected and movement of the unaffected hand. The presented model can simulate the three conditions using a single set of connectivity parameters, assuming that only inputs to the ROIs change from one condition to the other. The proposed procedure represents an innovative method to assess a brain circuit, which does not rely on a task-dependent connectivity network, and allows brain rhythms and desynchronization to be assessed on a quantitative basis. \r\n",
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- "timestamp_created": "2024-01-12 10:20:53.437944+00:00",
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- "uri": "https://github.com/OpenSourceBrain/267174",
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- "name": "Spinal motoneuron recruitment regulated by ionic channels during fictive locomotion (Zhang & Dai 20)",
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- "summary": "\"... we investigated the channel mechanism regulating the motoneuron recruitment. Three types of motoneuron pools including slow (S), fatigue-resistant (FR) and fast-fatigable (FF) motoneurons were constructed based on the membrane proprieties of cat lumbar motoneurons. The transient sodium (NaT), persistent sodium (NaP), delayed-rectifier potassium [K(DR)], Ca2+-dependent K+ [K(AHP)] and L-type calcium (CaL) channels were included in the models...\"",
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- "id": 576,
- "tag": "I K"
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- "id": 589,
- "tag": "I L high threshold"
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- "name": "HH model of SCN neurons including a transient K+ channel (Bano-Otalora et al 2021)",
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- "summary": "This MATLAB code is associated with the paper \"Daily electrical activity in the master circadian clock of a diurnal mammal\" by Beatriz Bano-Otalora, Matthew J Moye, Timothy Brown, Robert J Lucas, Casey O Diekman, Mino DC Belle. eLife 2021; 10:e68719\r\nDOI: https://doi.org/10.7554/eLife.68179\r\n\r\nIt simulates a Hodgkin-Huxley-type model of the electrical activity of suprachiasmatic nucleus (SCN) neurons in the diurnal rodent Rhabdomys pumilio. Model parameters were inferred from current-clamp recordings using data assimilation (DA) algorithms available at https://github.com/mattmoye/neuroDA",
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- "id": 736,
- "tag": "Action Potentials"
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- "id": 1586,
- "tag": "Circadian Rhythms"
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- "timestamp_created": "2024-01-12 10:20:54.499021+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/267183",
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- "name": "Neuromusculoskeletal modeling with neural and finite element models (Volk et al, 2021)",
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- "summary": "\"In this study, we present a predictive NMS model that uses an embedded neural architecture within a finite element (FE) framework to simulate muscle activation. A previously developed neuromuscular model of a motor neuron was embedded into a simple FE musculoskeletal model. Input stimulation profiles from literature were simulated in the FE NMS model to verify effective integration of the software platforms. Motor unit recruitment and rate coding capabilities of the model were evaluated. The integrated model reproduced previously published output muscle forces with an average error of 0.0435 N. The integrated model effectively demonstrated motor unit recruitment and rate coding in the physiological range based upon motor unit discharge rates and muscle force output.\"",
- "tags": [
- {
- "id": 710,
- "tag": "FORTRAN"
- },
- {
- "id": 731,
- "tag": "I CAN"
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- "id": 583,
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- "id": 576,
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- "id": 581,
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- "id": 2355,
- "tag": "ModelDB:267184"
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- "id": 1966,
- "tag": "Motor control"
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- "id": 659,
- "tag": "NetPyNE"
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- "id": 791,
- "tag": "Rate-coding model neurons"
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- "timestamp_created": "2024-01-12 10:20:55.057491+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/267184",
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- "id": 1747,
- "name": "Biophysical models of AWCon and RMD C. elegans neurons (M. Nicoletti at al. 2019)",
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- "summary": "Here are presented the Hodgkin-Huxley models of AWCon and RMD cells of the C. elegans nervous system as reported in Nicoletti et al. 2019. Cells are stimulated both in voltage and current clamp.",
- "tags": [
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 2318,
- "tag": "IK Bkca"
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- "id": 2319,
- "tag": "IK Skca"
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- "id": 564,
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- "id": 2356,
- "tag": "ModelDB:267187"
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- "id": 759,
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- "timestamp_created": "2024-01-12 10:20:55.590540+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/267187",
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- "email": "info@opensourcebrain.org",
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- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
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- "default_context": "master",
- "id": 1748,
- "name": "Computational model of cerebellar tDCS (Zhang et al., 2021)",
- "repository_type": "github",
- "summary": "This archive contains models used in (Zhang et al. 2021) and simulates Purkinje cell, granule cell, and deep cerebellar neuron activities under cerebellar tDCS (transcranial direct current stimulation).",
- "tags": [
- {
- "id": 564,
- "tag": "ModelDB"
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- "tag": "ModelDB:267189"
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- "timestamp_created": "2024-01-12 10:20:56.101898+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/267189",
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- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
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- "id": 1749,
- "name": "eLIF and mAdExp: energy-based integrate-and-fire neurons (Fardet and Levina 2020)",
- "repository_type": "github",
- "summary": "The eLIF and mAdExp neurons respectively extend the leaky integrate-and-fire and adaptive exponential (AdExp) neuron models.\r\nThey include a new variable modelling the availability of energy substrate and model constraints that energy availability may have on the subthreshold and spiking dynamics.\r\nIn the paper, we show how these models can reproduce complex dynamics and prove especially useful to model metabolic disruption, for instance in large-scale models of epilepsy or other diseases with metabolic components, such as Alzheimer, or Parkinson.\r\nGit repository: https://git.sr.ht/~tfardet/elif-madexp",
- "tags": [
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- "id": 1530,
- "tag": "Anoxic depolarization"
- },
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- "id": 2255,
- "tag": "Brian 2"
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- "id": 873,
- "tag": "Depolarization block"
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- "id": 2358,
- "tag": "Energy consumption"
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- "id": 2359,
- "tag": "ModelDB:267201"
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- "id": 611,
- "tag": "NEST"
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- "id": 577,
- "tag": "NEURON"
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- "id": 573,
- "tag": "Rebound firing"
- },
- {
- "id": 569,
- "tag": "Simplified Models"
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- "id": 777,
- "tag": "Spike Frequency Adaptation"
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- "timestamp_created": "2024-01-12 10:20:56.787178+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/267201",
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- "id": 1750,
- "name": "Cat Locomotion and Paw-Shaking Central Pattern Generator Model (Parker et al 2021)",
- "repository_type": "github",
- "summary": "We suggest that the cat paw-shaking response is generated as a transient response of the locomotor CPG. Our general prediction is that this CPG is multifunctional, and in addition to the locomotor rhythm, it can generate a transient, ten-times faster, paw-shake-like response to a stimulus. In our multistable half-center oscillator (HCO) CPG model, we applied perturbations to the locomotor pattern which resulted in a transient paw-shake-like pattern that eventually returned back to the locomotor pattern. We showed that the inactivation of the slow inward current that drives the locomotor rhythm produced asymmetry of the transient flexor and extensor activity in a symmetric HCO model. To test predictions from our model about the transient nature of the paw-shake response, we compared burst durations (BDs) and interburst intervals (IBIs) of the model half-centers in consecutive cycles of paw-shake-like responses with the with the BD and IBI of electromyographic (EMG) activity bursts of cat hindlimb flexors and extensors recorded during a paw-shake response. In both cases, we found similar asymmetric trends in the BD and IBI throughout a paw-shake response.",
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- "id": 755,
- "tag": "C or Cplusplus program"
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- "tag": "ModelDB:267219"
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- "timestamp_created": "2024-01-12 10:20:57.444919+00:00",
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- "uri": "https://github.com/OpenSourceBrain/267219",
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- "name": "Hippocampal CA1 microcircuit model including somatic and dendritic inhibition",
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- "summary": "Here, we investigate the role of (dis)inhibition on the lateral entorhinal cortex (LEC) induced dendritic spikes on hippocampal CA1 pyramidal cells. The circuit model consists of pyramidal, SST+, CCK+, CR+/VIP+, and CCK+/VIP+ cells.",
- "tags": [
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- "id": 579,
- "tag": "Active Dendrites"
- },
- {
- "id": 1684,
- "tag": "Ca pump"
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- "id": 565,
- "tag": "Dendritic Action Potentials"
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- "id": 590,
- "tag": "I A"
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- "id": 583,
- "tag": "I Calcium"
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- "id": 576,
- "tag": "I K"
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- "id": 581,
- "tag": "I K,Ca"
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- "id": 580,
- "tag": "I M"
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- "id": 1532,
- "tag": "I Na, leak"
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- "id": 574,
- "tag": "I Na,t"
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- "id": 594,
- "tag": "I h"
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- "id": 2318,
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- "tag": "ModelDB:267221"
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- "timestamp_created": "2024-01-12 10:20:58.027743+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/267221",
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- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
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- "id": 1752,
- "name": "Mauthner cell with two pre-synaptic cells, an inhibitory and an excitatory cell (Orr et al 2021)",
- "repository_type": "github",
- "summary": "To study the role of endocannabinoids system in the modulation of social status-dependent zebrafish motor behavior, we constructed a neuronal network, which consists of Mauthner cell with two pre-synaptic cells, an inhibitory cell and an excitatory cell.",
- "tags": [
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 576,
- "tag": "I K"
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- "id": 581,
- "tag": "I K,Ca"
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- "tag": "ModelDB:267222"
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- "timestamp_created": "2024-01-12 10:20:58.580455+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/267222",
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- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
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- "username": "osbadmin"
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- "default_context": "main",
- "id": 1753,
- "name": "phenomenological model of the mouse circadian pacemaker",
- "repository_type": "github",
- "summary": "A phenomenological model of the mouse circadian pacemaker as found in the suprachiasmatic nucleus. The model is intrinsically rhythmic and responds to light input.",
- "tags": [
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- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
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- {
- "id": 2363,
- "tag": "ModelDB:267250"
- }
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- "timestamp_created": "2024-01-12 10:20:59.111336+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/267250",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "default_context": "main",
- "id": 1754,
- "name": "Mouse Episodic and Continuous Locomotion CPG (Sharples et al, 2022)",
- "repository_type": "github",
- "summary": "We modeled the locomotion CPG in neonatal mice, and our model produces both episodic and continuous locomotion, similar to activity seen in experimental recordings of motor neurons in the isolated spinal cords of neonatal mice. Our model is presented in Sharples SA, Parker J, Cruz JM, Vargas A, Lognon AP, Cheng N, Young L, Shonak A, Cymbalyuk G, Whelan PJ. Mechanisms of Episodic Rhythmicity Contributions of h-and Na+/K+ pump currents to the generation of episodic and continuous rhythmic activities. 2021. Frontiers in Cellular Neuroscience. 579. Accepted.",
- "tags": [
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- "id": 755,
- "tag": "C or Cplusplus program"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 591,
- "tag": "I K,leak"
- },
- {
- "id": 1532,
- "tag": "I Na, leak"
- },
- {
- "id": 2162,
- "tag": "I Na, slow inactivation"
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- "id": 594,
- "tag": "I h"
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- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2364,
- "tag": "ModelDB:267253"
- },
- {
- "id": 740,
- "tag": "Na/K pump"
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- ],
- "timestamp_created": "2024-01-12 10:20:59.625468+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/267253",
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- "name": "Spreading Depolarization in Brain Slices (Kelley et al. 2022)",
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- "summary": "A tissue-scale model of spreading depolarization (SD) in brain slices.\r\nWe used the NEURON simulator's reaction-diffusion framework to implement embed thousands of neurons \r\n(based on the the model from Wei et al. 2014)\r\nin the extracellular space of a brain slice, which is itself embedded in an bath solution.\r\nWe initiate SD in the slice by elevating extracellular K+ in a spherical region at the center of the slice.\r\nEffects of hypoxia and propionate on the slice were modeled by appropriate changes to the volume fraction \r\nand tortuosity of the extracellular space and oxygen/chloride concentrations.",
- "tags": [
- {
- "id": 1531,
- "tag": "I Cl, leak"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 591,
- "tag": "I K,leak"
- },
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- "id": 1532,
- "tag": "I Na, leak"
- },
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- "id": 574,
- "tag": "I Na,t"
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- "tag": "KCC2"
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- "id": 577,
- "tag": "NEURON"
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- "id": 1687,
- "tag": "NKCC1"
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- {
- "id": 740,
- "tag": "Na/K pump"
- },
- {
- "id": 1919,
- "tag": "Reaction-diffusion"
- },
- {
- "id": 2316,
- "tag": "Spreading depolarization"
- },
- {
- "id": 1899,
- "tag": "Spreading depression"
- }
- ],
- "timestamp_created": "2024-01-12 10:21:00.284465+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/267259",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "id": 1756,
- "name": "Particle-Swarm Based Modelling Reveals Two Distinct Classes of CRH^{PVN} Neurons (Lameu et al 2022)",
- "repository_type": "github",
- "summary": "\"... We developed a computational modelling platform that uses particle swarm optimization to rapidly and accurately fit biophysical neuron models to patched CRHPVN neurons. A model was fitted to each patched neuron without the use of dynamic clamping, or other procedures requiring sophisticated inputs and fitting algorithms. Any neuron undergoing standard current clamp step protocols for a few minutes can be fitted by this procedure...\"",
- "tags": [
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- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
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- "id": 2366,
- "tag": "ModelDB:267260"
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- "timestamp_created": "2024-01-12 10:21:00.886996+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/267260",
- "user": {
- "email": "info@opensourcebrain.org",
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- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
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- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "id": 1757,
- "name": "piriform plus endopiriform circuit model. Pyramidal cells, multipolar neurons, interneurons.",
- "repository_type": "github",
- "summary": "An extension of the model of piriform cortex published in Reviews in the Neurosciences, by R.D. Traub, Yuhai Tu, Miles A. Whittington",
- "tags": [
- {
- "id": 710,
- "tag": "FORTRAN"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2367,
- "tag": "ModelDB:267280"
- },
- {
- "id": 586,
- "tag": "Synchronization"
- }
- ],
- "timestamp_created": "2024-01-12 10:21:01.382418+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/267280",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "1758": {
- "auto_sync": true,
- "content_types": "modeling",
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- "modeling"
- ],
- "default_context": "main",
- "id": 1758,
- "name": "Hyperpolarization-activated inward current and dynamic range of electrical synapse (Stein et al '22)",
- "repository_type": "github",
- "summary": "Electrical synaptic transmission and voltage-gated ionic currents are often studied independently from one another. This model allows to study the interactions between the hyperpolarization-activated inward ionic current and a rectifying electrical synapse. Two single compartment nonspiking neurons are coupled through a rectifying electrical synapse. Current pulses are applied into the presynaptic neuron. The amplitude of the electrical postsynaptic potentials is measured. Ih can be added to either the pre- or postsynaptic neuron, or both. The cells represent the the MCN1 and LG neurons in the crab stomatogastric ganglion.",
- "tags": [
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 729,
- "tag": "Invertebrate"
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- "id": 1609,
- "tag": "Mathematica"
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- {
- "id": 564,
- "tag": "ModelDB"
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- "id": 2368,
- "tag": "ModelDB:267286"
- }
- ],
- "timestamp_created": "2024-01-12 10:21:02.252689+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/267286",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
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- "id": 1759,
- "name": "Simulations of modulation of HCN channels in L5PCs (M\u00e4ki-Marttunen and M\u00e4ki-Marttunen, 2022)",
- "repository_type": "github",
- "summary": "\"... In this work, we build upon existing biophysically detailed models of thick-tufted layer V pyramidal cells and model the effects of over- and under-expression of Ih channels as well as their neuromodulation by dopamine (gain of Ih function) and acetylcholine (loss of Ih function). We show that Ih channels facilitate the action potentials of layer V pyramidal cells in response to proximal dendritic stimulus while they hinder the action potentials in response to distal dendritic stimulus at the apical dendrite. We also show that the inhibitory action of the Ih channels in layer V pyramidal cells is due to the interactions between Ih channels and a hot zone of low voltage-activated Ca2+ channels at the apical dendrite. Our simulations suggest that a combination of Ih-enhancing neuromodulation at the proximal apical dendrite and Ih-inhibiting modulation at the distal apical dendrite can increase the layer V pyramidal excitability more than any of the two neuromodulators alone...\"",
- "tags": [
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2369,
- "tag": "ModelDB:267293"
- },
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- "id": 577,
- "tag": "NEURON"
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- "id": 1744,
- "tag": "Neuromodulation"
- }
- ],
- "timestamp_created": "2024-01-12 10:21:02.853735+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/267293",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "auto_sync": true,
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- "id": 1760,
- "name": "Distributed working memory in large-scale macaque brain model (Mejias and Wang, 2022)",
- "repository_type": "github",
- "summary": "This code simulates working memory in a large-scale cortical network of the macaque brain. The model is constrained by anatomical data and provides a simple framework to explain the widespread activation of cortical areas during working memory.",
- "tags": [
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
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- "id": 2370,
- "tag": "ModelDB:267295"
- },
- {
- "id": 794,
- "tag": "Working memory"
- }
- ],
- "timestamp_created": "2024-01-12 10:21:03.394082+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/267295",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "1761": {
- "auto_sync": true,
- "content_types": "modeling",
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- ],
- "default_context": "main",
- "id": 1761,
- "name": "A model of working memory for encoding multiple items (Ursino et al, in press)",
- "repository_type": "github",
- "summary": "We present an original neural network model, based on oscillating neural masses, to investigate mechanisms at the basis of working memory in different conditions. Simulations show that the trained network is able to desynchronize up to nine items without a fixed order using the gamma rhythm. Moreover, the network can replicate a sequence of items using a gamma rhythm nested inside a theta rhythm. The reduction in some parameters, mainly concerning the strength of GABAergic synapses, induce memory alterations which mimic neurological deficits. Finally, the network, isolated from the external environment simulates an\u201cimagination phase\u201d.",
- "tags": [
- {
- "id": 1799,
- "tag": "Gamma oscillations"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2371,
- "tag": "ModelDB:267297"
- }
- ],
- "timestamp_created": "2024-01-12 10:21:03.929561+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/267297",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "1762": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
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- ],
- "default_context": "master",
- "id": 1762,
- "name": "Acetylcholine Boosts Dendritic NMDA Spikes in a CA3 Pyramidal Neuron Model (Humphries et al., 2021)",
- "repository_type": "github",
- "summary": "This model was used to compare the nonlinearity of NMDA inputs between dendritic sections in a CA3 pyramidal neuron as well as investigate the effect of cholinergic modulation/potassium channel inhibition on this dendritic NMDA-mediated nonlinearity.",
- "tags": [
- {
- "id": 579,
- "tag": "Active Dendrites"
- },
- {
- "id": 565,
- "tag": "Dendritic Action Potentials"
- },
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2372,
- "tag": "ModelDB:267298"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 1744,
- "tag": "Neuromodulation"
- },
- {
- "id": 620,
- "tag": "Python"
- }
- ],
- "timestamp_created": "2024-01-12 10:21:04.480597+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/267298",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1763,
- "name": "Morphological determinants of action potential dynamics in substantia nigra (Moubarak et al 2022)",
- "repository_type": "github",
- "summary": "This model allows to simulate pacemaking activity in 37 fully reconstructed neurons. Calcium and sodium conductances vary by 11 increments in the Axon bearing dendrite part to simulate a 11*11*37 models. For each model Action potential (AP) properties are measured : frequency, amplitude, Threshold, Half duration, max first and second derivative. AP and conductances traces are then saved in a csv file.",
- "tags": [
- {
- "id": 727,
- "tag": "Action Potential Initiation"
- },
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 579,
- "tag": "Active Dendrites"
- },
- {
- "id": 1684,
- "tag": "Ca pump"
- },
- {
- "id": 565,
- "tag": "Dendritic Action Potentials"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 2319,
- "tag": "IK Skca"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2373,
- "tag": "ModelDB:267306"
- },
- {
- "id": 577,
- "tag": "NEURON"
- }
- ],
- "timestamp_created": "2024-01-12 10:21:05.028471+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/267306",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "auto_sync": true,
- "content_types": "modeling",
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- "modeling"
- ],
- "default_context": "master",
- "id": 1764,
- "name": "Hippocampal CA3 thorny and a-thorny principal neuron models (Linaro et al in review)",
- "repository_type": "github",
- "summary": "This repository contains two populations of biophysically detailed models of murine hippocampal CA3 pyramidal neurons based on the two principal cell types that comprise this region. They are the result of a data-driven approach aimed at optimizing the model parameters by utilizing high-resolution morphological reconstructions and patch-clamp electrophysiology data together with a multi-objective optimization algorithm.\r\n\r\nThe models quantitatively match the cell type-specific firing phenotypes and recapitulate the intrinsic population-level variability observed in the data. Additionally, the conductance values found by the optimization algorithm are consistent with differentially expressed ion channel genes in single-cell transcriptomic data for the two cell types.\r\n\r\nThe models have further been employed to investigate the cell type-specific biophysical properties involved in the generation of complex-spiking output driven by synaptic input and to show that a-thorny bursting cells are capable of encoding more information in their firing output than their counterparts, thorny regular spiking neurons.\r\n\r\nReference:\r\n\r\nLinaro D, Levy MJ, and Hunt, DL. Cell type-specific mechanisms of information transfer in data-driven biophysical models of hippocampal CA3 principal neurons. (2022) PLOS Computational Biology",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 566,
- "tag": "Bursting"
- },
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 2325,
- "tag": "Excitability"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 739,
- "tag": "I Na,p"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 1478,
- "tag": "Information transfer"
- },
- {
- "id": 564,
- "tag": "ModelDB"
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- "id": 2374,
- "tag": "ModelDB:267307"
- },
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- "id": 577,
- "tag": "NEURON"
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- "id": 568,
- "tag": "Parameter Fitting"
- },
- {
- "id": 596,
- "tag": "Synaptic Integration"
- }
- ],
- "timestamp_created": "2024-01-12 10:21:05.596855+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/267307",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 1765,
- "name": "A modified Morris-Lecar model with gM and gAHP (Yang et al., 2022)",
- "repository_type": "github",
- "summary": "The model code for BioRxiv https://www.biorxiv.org/content/10.1101/2020.12.04.410787\r\n\r\nPlease see readme.txt to get started. ",
- "tags": [
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 2358,
- "tag": "Energy consumption"
- },
- {
- "id": 580,
- "tag": "I M"
- },
- {
- "id": 1433,
- "tag": "I_AHP"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2375,
- "tag": "ModelDB:267309"
- }
- ],
- "timestamp_created": "2024-01-12 10:21:06.174920+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/267309",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "content_types": "modeling",
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- "modeling"
- ],
- "default_context": "main",
- "id": 1766,
- "name": "Modulation of cortical Up-Down state switching by astrocytes (Moyse & Berry, 2022)",
- "repository_type": "github",
- "summary": "Recent experimental studies have suggested that the astrocytes of the local network can actually control the emergence of Up-Down regimes. Here we propose and study a neural net-\r\nwork model to explore the implication of astrocytes in this dynamical phenomenon. We consider three populations of cells: excitatory neurons, inhibitory neurons and astrocytes, interconnected by gliotransmission events, from neurons to astrocytes and back. We derive two models for this three-population system: a rate model and a stochastic\r\nspiking neural network with thousands of neurons and astrocytes. In numerical simulations of these three-population models, the presence of astrocytes is indeed observed\r\nto promote the emergence of Up-Down regimes with realistic characteristics.",
- "tags": [
- {
- "id": 804,
- "tag": "Bifurcation"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2376,
- "tag": "ModelDB:267310"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- }
- ],
- "timestamp_created": "2024-01-12 10:21:06.699398+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/267310",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1767": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1767,
- "name": "Depolarization Enhacement of Dendritic Spike Propagation (Bock et al 2022)",
- "repository_type": "github",
- "summary": "This model shows that small subthreshold depolarization of the soma powerfully enhances the propagation of dendritic spikes, through inactivation of dendritic A-type potassium channels.",
- "tags": [
- {
- "id": 572,
- "tag": "Calcium dynamics"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 844,
- "tag": "I R"
- },
- {
- "id": 575,
- "tag": "I T low threshold"
- },
- {
- "id": 594,
- "tag": "I h"
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- {
- "id": 564,
- "tag": "ModelDB"
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- {
- "id": 2377,
- "tag": "ModelDB:267311"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 620,
- "tag": "Python"
- },
- {
- "id": 725,
- "tag": "Synaptic Plasticity"
- }
- ],
- "timestamp_created": "2024-01-12 10:21:07.263536+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/267311",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "default_context": "main",
- "id": 1768,
- "name": "Lateral entorhinal cortex network model (Traub and Whittington, in press)",
- "repository_type": "github",
- "summary": "Circuits of multicompartment cells, including fan cells, layer 2 and layer 3 pyramidal cells, and multiple interneuron types; developed from model of piriform cortex (Traub, Tu and Whittington, Reviews in the Neurosciences), and Traub and Whittington, PNAS 2022",
- "tags": [
- {
- "id": 710,
- "tag": "FORTRAN"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2378,
- "tag": "ModelDB:267318"
- }
- ],
- "timestamp_created": "2024-01-12 10:21:07.839405+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/267318",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "content_types": "modeling",
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- "id": 1769,
- "name": "Phasic dopamine changes, Hebbian mechs during reversal learning in striatum (Schirru et al in press)",
- "repository_type": "github",
- "summary": "A model simulating probabilistic action selection in the basal ganglia and reversal learning, with the possibility to use different versions of the Hebb rule and a flexible behavior for dopamine phasic changes ",
- "tags": [
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2379,
- "tag": "ModelDB:267324"
- },
- {
- "id": 809,
- "tag": "Reinforcement Learning"
- }
- ],
- "timestamp_created": "2024-01-12 10:21:08.361916+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/267324",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "auto_sync": true,
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- "default_context": "main",
- "id": 1770,
- "name": "Patterns of synchronization in 2D networks of inhibitory neurons (Miller et al, 2022)",
- "repository_type": "github",
- "summary": "We study sychronization in a 2D network of instrinsically oscillatory inhibitory neurons with connections to first nearest neighbours (horizontally, vertically and diagonally) and second nearest neighbours (horizonally and vertically)",
- "tags": [
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 2162,
- "tag": "I Na, slow inactivation"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2380,
- "tag": "ModelDB:267329"
- },
- {
- "id": 586,
- "tag": "Synchronization"
- }
- ],
- "timestamp_created": "2024-01-12 10:21:08.976715+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/267329",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "id": 1771,
- "name": "Cerebellar Model for the Optokinetic Response (Kim and Lim 2021)",
- "repository_type": "github",
- "summary": "We consider a cerebellar spiking neural network for the optokinetic response (OKR). Individual granule (GR) cells exhibit diverse spiking patterns which are in-phase, anti-phase, or complex out-of-phase with respect to their population-averaged firing activity. Then, these diversely-recoded signals via parallel fibers (PFs) from GR cells are effectively depressed by the error-teaching signals via climbing fibers from the inferior olive which are also in-phase ones. Synaptic weights at in-phase PF-Purkinje cell (PC) synapses of active GR cells are strongly depressed via strong long-term depression (LTD), while those at anti-phase and complex out-of-phase PF-PC synapses are weakly depressed through weak LTD. This kind of \u2018\u2018effective\u2019\u2019 depression at the PF-PC synapses causes a big modulation in firings of PCs, which then exert effective inhibitory coordination on the vestibular nucleus (VN) neuron (which evokes OKR). For the firing of the VN neuron, the learning gain degree, corresponding to the modulation gain ratio, increases with increasing the learning cycle, and it saturates.",
- "tags": [
- {
- "id": 755,
- "tag": "C or Cplusplus program"
- },
- {
- "id": 2381,
- "tag": "Effective Optokinetic Response (OKR)"
- },
- {
- "id": 825,
- "tag": "Learning"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2382,
- "tag": "ModelDB:267334"
- },
- {
- "id": 758,
- "tag": "Sensory processing"
- }
- ],
- "timestamp_created": "2024-01-12 10:21:09.516607+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/267334",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "1772": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 1772,
- "name": "MEC PV-positive fast-spiking interneuron network generates theta-nested fast oscillations",
- "repository_type": "github",
- "summary": "We use a computational model of a network of Fast-Spiking Parvalbumin-positive Basket Cells to study its synchronizing properties. The intrinsic properties of neurons, properties of chemical synapses and of gap junctions are calibrated using electrophysiological recordings in mice Medial Entorhinal Cortex slices. The neurons synchronize, generating Fast Oscillations nested in an external theta drive. We show how gap junctions are necessary for the generation of the oscillations, how hyperpolarizing chemical synapses give rise to more robust fast oscillations, compared to shunting ones, and how short-term depression in the chemical synapses confine the fast oscillation on a narrow range of phases from the external theta drive.",
- "tags": [
- {
- "id": 1527,
- "tag": "Brain Rhythms"
- },
- {
- "id": 2255,
- "tag": "Brian 2"
- },
- {
- "id": 2325,
- "tag": "Excitability"
- },
- {
- "id": 1799,
- "tag": "Gamma oscillations"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2383,
- "tag": "ModelDB:267338"
- },
- {
- "id": 724,
- "tag": "Short-term Synaptic Plasticity"
- },
- {
- "id": 2384,
- "tag": "Theta oscillations"
- }
- ],
- "timestamp_created": "2024-01-12 10:21:10.088683+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/267338",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "id": 1773,
- "name": "Explainable AI for spatial navigation based on hippocampal circuitry (Coppolino + Migliore 2023)",
- "repository_type": "github",
- "summary": "Learning to navigate a complex environment is not a difficult task for a mammal. For example, finding\r\nthe correct way to exit a maze following a sequence of cues, does not need a long training session. Just\r\na single or a few runs through a new environment is, in most cases, sufficient to learn an exit path\r\nstarting from anywhere in the maze. This ability is in striking contrast with the well-known difficulty\r\nthat any deep learning algorithm has in learning a trajectory through a sequence of objects. Being\r\nable to learn an arbitrarily long sequence of objects to reach a specific place could take, in general,\r\nprohibitively long training sessions. This is a clear indication that current artificial intelligence methods\r\nare essentially unable to capture the way in which a real brain implements a cognitive function. In\r\nprevious work, we have proposed a proof-of-principle model demonstrating how, using hippocampal\r\ncircuitry, it is possible to learn an arbitrary sequence of known objects in a single trial. We called\r\nthis model SLT (Single Learning Trial). In the current work, we extend this model, which we will call\r\ne-STL, to introduce the capability of navigating a classic four-arms maze to learn, in a single trial,\r\nthe correct path to reach an exit ignoring dead ends. We show the conditions under which the e-\r\nSLT network, including cells coding for places, head-direction, and objects, can robustly and efficiently\r\nimplement a fundamental cognitive function. The results shed light on the possible circuit organization\r\nand operation of the hippocampus and may represent the building block of a new generation of\r\nartificial intelligence algorithms for spatial navigation.",
- "tags": [
- {
- "id": 860,
- "tag": "Direction Selectivity"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2385,
- "tag": "ModelDB:267339"
- },
- {
- "id": 2058,
- "tag": "Persistent activity"
- },
- {
- "id": 799,
- "tag": "Place cell/field"
- },
- {
- "id": 714,
- "tag": "PyNN"
- },
- {
- "id": 620,
- "tag": "Python"
- }
- ],
- "timestamp_created": "2024-01-12 10:21:10.632231+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/267339",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "1774": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 1774,
- "name": "AIS model of L5 cortical pyramidal neuron (Filipis et al., 2023)",
- "repository_type": "github",
- "summary": "In neocortical layer-5 pyramidal neurons, the action potential (AP) is generated in the axon initial segment\r\n(AIS) when the membrane potential (Vm) reaches the threshold for activation of NaV1.6 and Nav1.2 voltage-\r\ngated Na+ channels, that differ in spatial distribution and biophysical properties. Here, we used ultrafast Na+, Vm\r\nand Ca2+ imaging in combination with pharmacological blocks of different channels to demonstrate the exclusive\r\nrole of each of them in shaping the generating AP. We mimicked the experimental results with this NEURON model where the role of the different ion channels tested reproduced the experimental evidence.\r\n\r\nNav1.2 and BK channels interaction shapes the action potential in the axon initial segment\r\nDOI: 10.1113/JP283801",
- "tags": [
- {
- "id": 727,
- "tag": "Action Potential Initiation"
- },
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 728,
- "tag": "Axonal Action Potentials"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 582,
- "tag": "I Sodium"
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- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2386,
- "tag": "ModelDB:267355"
- },
- {
- "id": 577,
- "tag": "NEURON"
- }
- ],
- "timestamp_created": "2024-01-12 10:21:11.235800+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/267355",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1775": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 1775,
- "name": "Pacemaking, Bursting, and Depolarization Block in Midbrain Dopamine Neurons (Knowlton et al. 2022)",
- "repository_type": "github",
- "summary": "Pacemaking, Bursting, and Depolarization Block in Midbrain Dopamine Neurons (Knowlton et al. 2022)",
- "tags": [
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2387,
- "tag": "ModelDB:267357"
- },
- {
- "id": 577,
- "tag": "NEURON"
- }
- ],
- "timestamp_created": "2024-01-12 10:21:11.762358+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/267357",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1776": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 1776,
- "name": "A modified Morris-Lecar with TRPC4 & GIRK (Tian et al. 2022)",
- "repository_type": "github",
- "summary": "Simulates differential activation of TRPC4 and GIRK channel to reproduce various spiking patterns underlying Gq/11\u2013Gi/o coincidence signals.\r\nThe attached code reproduces Fig.5B-F in Tian et al. 2022. Please see readme.txt to get started.",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 566,
- "tag": "Bursting"
- },
- {
- "id": 731,
- "tag": "I CAN"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 1433,
- "tag": "I_AHP"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2388,
- "tag": "ModelDB:267363"
- },
- {
- "id": 751,
- "tag": "Signaling pathways"
- }
- ],
- "timestamp_created": "2024-01-12 10:21:12.282128+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/267363",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1777": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 1777,
- "name": "Exact mean-field models for Izhikevich networks (Chen and Campbell 2022)",
- "repository_type": "github",
- "summary": "Main code on time series and bifurcation diagrams from the paper L. Chen and S. A. Campbell, Exact mean-field models for spiking neural networks with adaptation (preprint: https://arxiv.org/abs/2203.08341)",
- "tags": [
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2389,
- "tag": "ModelDB:267382"
- },
- {
- "id": 569,
- "tag": "Simplified Models"
- },
- {
- "id": 777,
- "tag": "Spike Frequency Adaptation"
- },
- {
- "id": 759,
- "tag": "XPPAUT"
- }
- ],
- "timestamp_created": "2024-01-12 10:21:12.887876+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/267382",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1778": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1778,
- "name": "NeuroGPU example on L5_TTPC1_cADpyr232_1 (Ben-Shalom 2022)(Ramaswamy et al., 2015)",
- "repository_type": "github",
- "summary": "This shows an example use case of building NeuroGPU simulation around a model pyramidal cell from the BBP portal. While the simulation can be run without python, we show how to update the parameters and run the simulation in python.",
- "tags": [
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2390,
- "tag": "ModelDB:267384"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 2391,
- "tag": "NeuroGPU"
- },
- {
- "id": 620,
- "tag": "Python"
- }
- ],
- "timestamp_created": "2024-01-12 10:21:13.436460+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/267384",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1779": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1779,
- "name": "A 3D population model of midget retinal ganglion cells at the human fovea (Italiano et al, 2022)",
- "repository_type": "github",
- "summary": "A robust means of generating eccentricity-dependent and morphologically realistic and three-dimensional populations of midget retinal ganglion cells at the central human retina (specifically, at the (para-)foveal region).",
- "tags": [
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2392,
- "tag": "ModelDB:267391"
- },
- {
- "id": 577,
- "tag": "NEURON"
- }
- ],
- "timestamp_created": "2024-01-12 10:21:13.949009+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/267391",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1780": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 1780,
- "name": "A sensorimotor-spinal cord model (Hoshino et al. 2022)",
- "repository_type": "github",
- "summary": "To elucidate how the flattening of sensory tuning due to a deficit in tonic inhibition slows motor responses, we simulated a neural network model in which a sensory cortical network (NS) and a motor cortical network (NM) are reciprocally connected, and the NM projects to spinal motoneurons (Mns). The NS was presented with a feature stimulus and the reaction time of Mns was measured. The flattening of sensory tuning in NS caused by decreasing the centration of GABA in extracellular space resulted in a decrease in the stimulus-sensitive NM pyramidal cell activity while increasing the stimulus-insensitive NM pyramidal cell activity, thereby prolonging the reaction time of Mns to the applied feature stimulus. We suggest that a reduction in extracellular GABA concentration in sensory cortex may interfere with selective activation in motor cortex, leading to slowing the activation of spinal motoneurons and therefore to slowing motor responses.",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 755,
- "tag": "C or Cplusplus program"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2393,
- "tag": "ModelDB:267395"
- }
- ],
- "timestamp_created": "2024-01-12 10:21:14.465842+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/267395",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1781": {
- "auto_sync": true,
- "content_types": "modeling",
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- "modeling"
- ],
- "default_context": "master",
- "id": 1781,
- "name": "A focal seizure model with ion concentration changes (Gentiletti et al., 2022)",
- "repository_type": "github",
- "summary": "Computer model was used to investigate the possible mechanisms of seizure initiation, progression and termination. The model was developed by complementing the Hodgkin-Huxley equations with activity-dependent changes in intra- and extracellular ion concentrations. The model incorporates a number of ionic mechanisms such as: active and passive membrane currents, inhibitory synaptic GABAA currents, Na/K pump, KCC2 cotransporter, glial K buffering, radial diffusion between extracellular space and bath, and longitudinal diffusion between dendritic and somatic compartments in pyramidal cells.",
- "tags": [
- {
- "id": 1684,
- "tag": "Ca pump"
- },
- {
- "id": 2330,
- "tag": "Dynamic extracellular concentrations"
- },
- {
- "id": 469,
- "tag": "Epilepsy"
- },
- {
- "id": 731,
- "tag": "I CAN"
- },
- {
- "id": 1531,
- "tag": "I Cl, leak"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 591,
- "tag": "I K,leak"
- },
- {
- "id": 589,
- "tag": "I L high threshold"
- },
- {
- "id": 580,
- "tag": "I M"
- },
- {
- "id": 1532,
- "tag": "I Na, leak"
- },
- {
- "id": 739,
- "tag": "I Na,p"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 1433,
- "tag": "I_AHP"
- },
- {
- "id": 1728,
- "tag": "I_HCO3"
- },
- {
- "id": 1685,
- "tag": "KCC2"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2394,
- "tag": "ModelDB:267499"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 740,
- "tag": "Na/K pump"
- },
- {
- "id": 1626,
- "tag": "Osmosis-driven water flux"
- }
- ],
- "timestamp_created": "2024-01-12 10:21:15.007339+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/267499",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1782": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 1782,
- "name": "L2/3 V1 Pyramidal Cell model (modified Park et al., 2019; a/n: 231185) (Petousakis et al., 2023)",
- "repository_type": "github",
- "summary": "",
- "tags": [
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 589,
- "tag": "I L high threshold"
- },
- {
- "id": 580,
- "tag": "I M"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 575,
- "tag": "I T low threshold"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2395,
- "tag": "ModelDB:267501"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 726,
- "tag": "Vision"
- }
- ],
- "timestamp_created": "2024-01-12 10:21:15.558367+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/267501",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1783": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1783,
- "name": "Effects of Dopamine Modulation and KIR Inactivation in NAc Medium Spiny Neurons (Steephen 2011)",
- "repository_type": "github",
- "summary": "Due to the involvement of nucleus accumbens (NAc) medium spiny neurons (MSNs) in diverse behaviors, their excitability changes can have broad functional significance. Dopamine modulates the biophysical behavior of MSNs. In ~40% of MSNs, inward rectifying potassium (KIR) currents inactivate significantly, imparting greater excitability. Employing a 189-compartment computational model of the MSN and using spatiotemporally distributed synaptic inputs, the regulation of excitability by KIR inactivation and dopaminergic modulation was investigated and quantitatively characterized. It was shown that by forming different combinations, these regulating agents could fine tune MSN excitability across a wide range. With existing evidence indicating MSNs with and without KIR inactivation to be the likely targets for D2- and D1-receptor mediated modulations, respectively, the present findings suggest that dopaminergic channel modulation may intensify the existing excitability difference between them by suppressing the excitability of MSNs without KIR inactivation while further enhancing the excitability of the more excitable MSNs with KIR inactivation. On the other hand, the combined modulation of channels and synapses by dopamine may reverse the relative excitability of one cell type with respect to the other.\r\n\r\nThis model contains a complete biophysical model of MSN cell. The application allows the user to vary the cell properties by choosing the type of KIR channels included (inKIR or non-inKIR), the type of Dopamine receptors (D1R or D2R) and the modulation mechanism (Intrinsic modulation , Intrinsic-synaptic modulation, or No modulation). The user can also choose between the single pulse current clamp stimulation or a physiologically realistic synaptic stimulation scheme. More details are available in the Help provided with the application.",
- "tags": [
- {
- "id": 727,
- "tag": "Action Potential Initiation"
- },
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 754,
- "tag": "Delay"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 730,
- "tag": "I A, slow"
- },
- {
- "id": 731,
- "tag": "I CAN"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 842,
- "tag": "I Krp"
- },
- {
- "id": 589,
- "tag": "I L high threshold"
- },
- {
- "id": 739,
- "tag": "I Na,p"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 844,
- "tag": "I R"
- },
- {
- "id": 575,
- "tag": "I T low threshold"
- },
- {
- "id": 742,
- "tag": "I p,q"
- },
- {
- "id": 567,
- "tag": "Ion Channel Kinetics"
- },
- {
- "id": 1931,
- "tag": "Kir"
- },
- {
- "id": 2396,
- "tag": "Kir, inactivating"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2397,
- "tag": "ModelDB:267508"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 1744,
- "tag": "Neuromodulation"
- },
- {
- "id": 596,
- "tag": "Synaptic Integration"
- }
- ],
- "timestamp_created": "2024-01-12 10:21:16.122968+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/267508",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1784": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1784,
- "name": "Cell-type specific integration of feedforward and feedback synaptic inputs (Ridner et al, 2022)",
- "repository_type": "github",
- "summary": "Simple compartmental model is used to explore and predict channel mechanisms that underlie differences in non-integration of synaptic inputs to posterior parietal cortex pyramidal subtypes, namely regular spiking cell and intrinsically bursting cell.",
- "tags": [
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 575,
- "tag": "I T low threshold"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2398,
- "tag": "ModelDB:267509"
- },
- {
- "id": 577,
- "tag": "NEURON"
- }
- ],
- "timestamp_created": "2024-01-12 10:21:16.706250+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/267509",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1785": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 1785,
- "name": "Physiological noise facilitates multiplexed coding of vibrotactile signals in somatosensory cortex",
- "repository_type": "github",
- "summary": "Simulations were conducted using a modified AdEx model. All simulations were performed in Brian2 with the Euler-Maruyama algorithm with fixed time step of 10 \u00b5s .",
- "tags": [
- {
- "id": 2255,
- "tag": "Brian 2"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2399,
- "tag": "ModelDB:267510"
- }
- ],
- "timestamp_created": "2024-01-12 10:21:17.217626+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/267510",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1786": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1786,
- "name": "Biophysically detailed model of somatosensory thalamocortical circuit",
- "repository_type": "github",
- "summary": "Large-scale biophysically detailed model of somatosensory thalamocortical circuits in NetPyNE",
- "tags": [
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 566,
- "tag": "Bursting"
- },
- {
- "id": 572,
- "tag": "Calcium dynamics"
- },
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2400,
- "tag": "ModelDB:267511"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 620,
- "tag": "Python"
- },
- {
- "id": 724,
- "tag": "Short-term Synaptic Plasticity"
- },
- {
- "id": 725,
- "tag": "Synaptic Plasticity"
- }
- ],
- "timestamp_created": "2024-01-12 10:21:17.750247+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/267511",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1787": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1787,
- "name": "Axonal subthreshold voltage signaling along hippocampal mossy fiber (Kamiya 2022)",
- "repository_type": "github",
- "summary": "Subthreshold depolarization of soma passively propagates into the axons for a substantial distance and thereby caused enhancement of the transmitter release from the axon terminals of hippocampal mossy fibers. Here we developed the granule cell-mossy fiber model implemented with axonal sodium potassium and calcium channels and explored the mechanisms underlying analog modulation of the action potential-evoked transmitter release by subthreshold voltage signaling along the axons. Action potential-induced calcium entry to the terminals was reduced, while subthreshold depolarization itself caused small calcium entry.",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 2401,
- "tag": "Analog coding"
- },
- {
- "id": 728,
- "tag": "Axonal Action Potentials"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2402,
- "tag": "ModelDB:267512"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 2403,
- "tag": "Subthreshold signaling"
- }
- ],
- "timestamp_created": "2024-01-12 10:21:19.624489+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/267512",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1788": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 1788,
- "name": "Scaffold model of mouse CA1 hippocampus. (Gandolfi et al 2022)",
- "repository_type": "github",
- "summary": "The model allows to connect point neurons based on probability clouds generated on morpho-anatomical landmarks",
- "tags": [
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2404,
- "tag": "ModelDB:267531"
- },
- {
- "id": 620,
- "tag": "Python"
- }
- ],
- "timestamp_created": "2024-01-12 10:21:20.363448+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/267531",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1789": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 1789,
- "name": "Realistic barrel cortical column - Matlab (Huang et al., 2022)",
- "repository_type": "github",
- "summary": "Reconstructed rodent barrel cortical column (thalamic filter-and-fire input, L4 and L2/3 spiking neurons) based on measured distributions, so each run will create a different connectivity). Includes 13 types of inhibitory and excitatory neurons, implemented as Izhikevich neurons. Includes both a Matlab and a Python (NetPyNe) implementation.",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 572,
- "tag": "Calcium dynamics"
- },
- {
- "id": 749,
- "tag": "Long-term Synaptic Plasticity"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2405,
- "tag": "ModelDB:267550"
- },
- {
- "id": 821,
- "tag": "Sensory coding"
- },
- {
- "id": 2406,
- "tag": "Spatial connectivity"
- },
- {
- "id": 777,
- "tag": "Spike Frequency Adaptation"
- },
- {
- "id": 596,
- "tag": "Synaptic Integration"
- },
- {
- "id": 725,
- "tag": "Synaptic Plasticity"
- }
- ],
- "timestamp_created": "2024-01-12 10:21:20.952061+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/267550",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1790": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 1790,
- "name": "Realistic barrel cortical column - NetPyNE (Huang et al., 2022)",
- "repository_type": "github",
- "summary": "Reconstructed rodent barrel cortical column (thalamic filter-and-fire input, L4 and L2/3 spiking neurons) based on measured distributions, so each run will create a different connectivity). Includes 13 types of inhibitory and excitatory neurons, implemented as Izhikevich neurons. Includes both a Matlab and a Python (NetPyNe) implementation.",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 572,
- "tag": "Calcium dynamics"
- },
- {
- "id": 749,
- "tag": "Long-term Synaptic Plasticity"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2407,
- "tag": "ModelDB:267551"
- },
- {
- "id": 659,
- "tag": "NetPyNE"
- },
- {
- "id": 821,
- "tag": "Sensory coding"
- },
- {
- "id": 2406,
- "tag": "Spatial connectivity"
- },
- {
- "id": 777,
- "tag": "Spike Frequency Adaptation"
- },
- {
- "id": 596,
- "tag": "Synaptic Integration"
- },
- {
- "id": 725,
- "tag": "Synaptic Plasticity"
- }
- ],
- "timestamp_created": "2024-01-12 10:21:21.491406+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/267551",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1791": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 1791,
- "name": "Spiny Projection Neuron Ca2+ based plasticity is robust to in vivo spike train (Dorman&Blackwell)",
- "repository_type": "github",
- "summary": "\"...we address the sensitivity of plasticity to trial-to-trial variability and delineate how spatiotemporal synaptic input patterns produce plasticity with in vivo-like conditions using a data-driven computational model with a calcium-based plasticity rule. Using in vivo spike train recordings as inputs, we show that plasticity is strongly robust to trial-to-trial variability of spike timing, and derive general synaptic plasticity rules describing how spatiotemporal patterns of synaptic inputs control the magnitude and direction of plasticity...\"",
- "tags": [
- {
- "id": 572,
- "tag": "Calcium dynamics"
- },
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 730,
- "tag": "I A, slow"
- },
- {
- "id": 1480,
- "tag": "I ANO2"
- },
- {
- "id": 842,
- "tag": "I Krp"
- },
- {
- "id": 589,
- "tag": "I L high threshold"
- },
- {
- "id": 721,
- "tag": "I N"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 844,
- "tag": "I R"
- },
- {
- "id": 575,
- "tag": "I T low threshold"
- },
- {
- "id": 2318,
- "tag": "IK Bkca"
- },
- {
- "id": 1931,
- "tag": "Kir"
- },
- {
- "id": 825,
- "tag": "Learning"
- },
- {
- "id": 1838,
- "tag": "MOOSE/PyMOOSE"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2408,
- "tag": "ModelDB:267552"
- },
- {
- "id": 620,
- "tag": "Python"
- },
- {
- "id": 725,
- "tag": "Synaptic Plasticity"
- }
- ],
- "timestamp_created": "2024-01-12 10:21:22.025593+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/267552",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1792": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 1792,
- "name": "Network dynamics of electrically coupled pituitary cells (Fazli and Bertram, 2022)",
- "repository_type": "github",
- "summary": "The model simulates a network of electrically coupled pituitary cells that are intrinsic bursters. The cells are homogeneous and the coupling is weak.",
- "tags": [
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2409,
- "tag": "ModelDB:267561"
- },
- {
- "id": 620,
- "tag": "Python"
- }
- ],
- "timestamp_created": "2024-01-12 10:21:22.628752+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/267561",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1793": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 1793,
- "name": "Model for pusatile insulin secretion at basal levels of glucose (Fletcher et al, 2022)",
- "repository_type": "github",
- "summary": "This model describes the basis of pulsatile insulin secretion from islet beta-cells at basal levels of glucose, where the cells are not electrically active.",
- "tags": [
- {
- "id": 795,
- "tag": "ATP-senstive potassium current"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2410,
- "tag": "ModelDB:267562"
- },
- {
- "id": 759,
- "tag": "XPPAUT"
- }
- ],
- "timestamp_created": "2024-01-12 10:21:23.134832+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/267562",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1794": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 1794,
- "name": "A model for early afterdepolarizations in the cardiomyocyte action potential (Kimrey et al., 2022)",
- "repository_type": "github",
- "summary": "The model demonstrates a common dynamic mechanism for calcium-dependent and calcium-independent early afterdepolarizations in cardiomyocytes.",
- "tags": [
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2411,
- "tag": "ModelDB:267563"
- },
- {
- "id": 759,
- "tag": "XPPAUT"
- }
- ],
- "timestamp_created": "2024-01-12 10:21:23.654341+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/267563",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1795": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 1795,
- "name": "Integrated Oscillator Model for pancreatic islet beta-cells (Marinelli et al., 2022)",
- "repository_type": "github",
- "summary": "This version of the Integrated Oscillator Model for pancreatic beta-cells includes variables for oxidative phosphorylation, as well as glycolysis, electrical activity, and calcium dynamics.",
- "tags": [
- {
- "id": 795,
- "tag": "ATP-senstive potassium current"
- },
- {
- "id": 566,
- "tag": "Bursting"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2412,
- "tag": "ModelDB:267564"
- },
- {
- "id": 759,
- "tag": "XPPAUT"
- }
- ],
- "timestamp_created": "2024-01-12 10:21:24.406545+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/267564",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1796": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 1796,
- "name": "Model for pancreatic beta-cells with two isoforms of PFK (Marinelli et al., 2022)",
- "repository_type": "github",
- "summary": "This version of the Integrated Oscillator Model has two PFK isoforms, as well as modules for oxidative phosphorylation, electrical activity, and intracellular calcium.",
- "tags": [
- {
- "id": 795,
- "tag": "ATP-senstive potassium current"
- },
- {
- "id": 566,
- "tag": "Bursting"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2413,
- "tag": "ModelDB:267565"
- },
- {
- "id": 759,
- "tag": "XPPAUT"
- }
- ],
- "timestamp_created": "2024-01-12 10:21:24.978273+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/267565",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1797": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 1797,
- "name": "Stochastic model for pituitary corticotrophs (Duncan et al., 2022)",
- "repository_type": "github",
- "summary": "This model describes the electrical activity of pituitary corticotrophs, in which bursting occurs due to the stochastic opening of BK-type potassium channels.",
- "tags": [
- {
- "id": 566,
- "tag": "Bursting"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2414,
- "tag": "ModelDB:267566"
- }
- ],
- "timestamp_created": "2024-01-12 10:21:25.500579+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/267566",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1798": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 1798,
- "name": "Parallel Tempering MCMC on Liu et al 1998 (Wang et al 2022)",
- "repository_type": "github",
- "summary": "\"... we propose using a particular Markov chain Monte Carlo (MCMC) algorithm, which has the advantage of inferring parameters in a Bayesian framework. The Bayesian approach is designed to be suitable for multimodal solutions to inverse problems. We introduce and demonstrate the method using a three-channel HH model. We then focus on the inference of nine parameters in an eight-channel HH model, which we analyze in detail. We explore how the MCMC algorithm can uncover complex relationships between inferred parameters using five injected current levels. The MCMC method provides as a result a nine-dimensional posterior distribution, which we analyze visually with solution maps or landscapes of the possible parameter sets...\"",
- "tags": [
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 861,
- "tag": "I_K,Na"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2415,
- "tag": "ModelDB:267583"
- },
- {
- "id": 620,
- "tag": "Python"
- }
- ],
- "timestamp_created": "2024-01-12 10:21:26.006172+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/267583",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1799": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 1799,
- "name": "Simulations of Reaching Adaptation and Control (Crevecoeur et al., 2022)",
- "repository_type": "github",
- "summary": "The code provided is the one that was used to produce the simulations in Fig. 6. The main script is script_AC.m, which calls several subroutines. The routine script_AC.m defines the online learning rates and simulate a series of trials with either only offline learning, or both offline and online learning. The offline component of learning is identical for the two series. It calls adaptiveReaching.m and adaptiveLQG.m. The former defines the model matrices and the latter runs the simulation of a movement trajectory. Importantly, these two subroutines are the same as those published with our previous study (Crevecoeur et al., eNeuro, 7(1), 2020) and can be accessed at this link: http://modeldb.yale.edu/261466 . Two other functions are added to the model files: the functions expfit.m and expfitdual.m, which are called to extract the time constants associated with exponential models including one or two decay rates, respectively. The routines also use the function nlinfit.m and nlparci.m of the Statistics and Machine Learning Toolbox (Mathworks, Matlab R2017b).",
- "tags": [
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2416,
- "tag": "ModelDB:267586"
- }
- ],
- "timestamp_created": "2024-01-12 10:21:26.518240+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/267586",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1800": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1800,
- "name": "Human L5 Cortical Circuit (Guet-McCreight)",
- "repository_type": "github",
- "summary": "We used L5 Pyr neuron models fit to electrophysiology data from younger and older individuals to simulate detailed human layer 5 microcircuits. These circuits also included detailed parvalbumin+ (PV), somatostatin+ (SST), and vasoactivate intestinal polypeptide+ (VIP) inhibitory interneuron models.",
- "tags": [
- {
- "id": 827,
- "tag": "Aging/Alzheimer`s"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 580,
- "tag": "I M"
- },
- {
- "id": 739,
- "tag": "I Na,p"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 2319,
- "tag": "IK Skca"
- },
- {
- "id": 2417,
- "tag": "LFPy"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2418,
- "tag": "ModelDB:267587"
- },
- {
- "id": 577,
- "tag": "NEURON"
- }
- ],
- "timestamp_created": "2024-01-12 10:21:27.103957+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/267587",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1801": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 1801,
- "name": "Decorrelation in the developing visual thalamus (Tikidji-Hamburyan et al, accepted)",
- "repository_type": "github",
- "summary": "The developing visual thalamus and cortex extract positional information encoded in\r\nthe correlated activity of retinal ganglion cells by synaptic plasticity, allowing for the refinement of\r\nconnectivity. Here, we use a biophysical model of the visual thalamus during the initial visual circuit\r\nrefinement period to explore the role of synaptic and circuit properties in the regulation of such\r\nneural correlations. We find that the NMDA receptor dominance, combined with weak recurrent\r\nexcitation and inhibition characteristic of this age, prevents the emergence of spike-\u00adcorrelations\r\nbetween thalamocortical neurons on the millisecond timescale. Such precise correlations, which\r\nwould emerge due to the broad, unrefined connections from the retina to the thalamus, reduce the\r\nspatial information contained by thalamic spikes, and therefore we term them \"parasitic\" correlations.\r\nOur results suggest that developing synapses and circuits evolved mechanisms to compensate for\r\nsuch detrimental parasitic correlations arising from the unrefined and immature circuit.",
- "tags": [
- {
- "id": 793,
- "tag": "Development"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 589,
- "tag": "I L high threshold"
- },
- {
- "id": 739,
- "tag": "I Na,p"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 575,
- "tag": "I T low threshold"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2419,
- "tag": "ModelDB:267589"
- },
- {
- "id": 577,
- "tag": "NEURON"
- }
- ],
- "timestamp_created": "2024-01-12 10:21:27.728052+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/267589",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1802": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 1802,
- "name": "Purkinje cell dendritic tree selection in early cerebellar development (Kato + De Schutter)",
- "repository_type": "github",
- "summary": "\"The study presents the first computational model that simultaneously simulates Purkinje cell growth and the dynamics of granule cell migrations during the first two postnatal weeks, allowing exploration of the role of physical and synaptic interactions upon dendritic selection. The model suggests that interaction with parallel fibers is important to establish the distinct planar morphology of Purkinje cell dendrites. Specific rules to select which dendritic trees to keep or retract result in larger winner trees with more synaptic contacts than using random selection. A rule based on afferent synaptic activity was less effective than rules based on dendritic size or numbers of synapses.\"",
- "tags": [
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2420,
- "tag": "ModelDB:267591"
- },
- {
- "id": 2421,
- "tag": "NeuroDevSim"
- },
- {
- "id": 620,
- "tag": "Python"
- }
- ],
- "timestamp_created": "2024-01-12 10:21:28.253593+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/267591",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1803": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1803,
- "name": "LGMD - ON excitation to dendritic field C",
- "repository_type": "github",
- "summary": "Neuron model code used in \"Contrast-polarity specific mapping improves efficiency of neuronal computation for collision detection\". This model adapts previous LGMD model to investigate the effects of newly discovered ON excitation impinging on dendritic field C",
- "tags": [
- {
- "id": 579,
- "tag": "Active Dendrites"
- },
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 580,
- "tag": "I M"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 747,
- "tag": "I_KD"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2422,
- "tag": "ModelDB:267594"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 587,
- "tag": "Spatio-temporal Activity Patterns"
- },
- {
- "id": 596,
- "tag": "Synaptic Integration"
- },
- {
- "id": 726,
- "tag": "Vision"
- }
- ],
- "timestamp_created": "2024-01-12 10:21:28.823194+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/267594",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1804": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1804,
- "name": "Human layer 2/3 cortical microcircuits in health and depression (Yao et al, 2022)",
- "repository_type": "github",
- "summary": "Human layer 2/3 cortical microcircuits in health and depression (Yao et al, 2022)",
- "tags": [
- {
- "id": 722,
- "tag": "Depression"
- },
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 580,
- "tag": "I M"
- },
- {
- "id": 739,
- "tag": "I Na,p"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 2319,
- "tag": "IK Skca"
- },
- {
- "id": 2417,
- "tag": "LFPy"
- },
- {
- "id": 2423,
- "tag": "Major Depression Disease (MDD)"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2424,
- "tag": "ModelDB:267595"
- },
- {
- "id": 577,
- "tag": "NEURON"
- }
- ],
- "timestamp_created": "2024-01-12 10:21:29.460460+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/267595",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1805": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 1805,
- "name": "ELL Medium Ganglion Cell (Mormyrid fish) (Muller et al, accepted)",
- "repository_type": "github",
- "summary": "\"In addition to the action potentials used for axonal signaling, many neurons generate dendritic 'spikes' associated with synaptic plasticity. However, in order to control both plasticity and signaling, synaptic inputs must be able to differentially modulate the firing of these two spike types. Here we investigate this issue in the electrosensory lobe (ELL) of weakly electric mormyrid fish, where separate control over axonal and dendritic spikes is essential for the transmission of learned predictive signals from inhibitory interneurons to the output stage of the circuit. Through a combination of experimental and modeling studies, we uncover a novel mechanism by which sensory input selectively modulates the rate of dendritic spiking by adjusting the amplitude of backpropagating axonal action potentials. Interestingly, this mechanism does not require spatially segregated synaptic inputs or dendritic compartmentalization, but relies instead on an electrotonically distant spike initiation site in the axon\u2014a common biophysical feature of neurons. \"",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 579,
- "tag": "Active Dendrites"
- },
- {
- "id": 728,
- "tag": "Axonal Action Potentials"
- },
- {
- "id": 565,
- "tag": "Dendritic Action Potentials"
- },
- {
- "id": 75,
- "tag": "Homeostasis"
- },
- {
- "id": 861,
- "tag": "I_K,Na"
- },
- {
- "id": 825,
- "tag": "Learning"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2425,
- "tag": "ModelDB:267596"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 620,
- "tag": "Python"
- },
- {
- "id": 725,
- "tag": "Synaptic Plasticity"
- }
- ],
- "timestamp_created": "2024-01-12 10:21:30.007678+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/267596",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1806": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 1806,
- "name": "Adaptive Generalized Leaky Integrate-and-Fire Model (AGLIF) (Marasco et al., 2023)",
- "repository_type": "github",
- "summary": "Adaptive Generalized Leaky Integrate-and-Fire Model (AGLIF) (Marasco et al., 2023)",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2426,
- "tag": "ModelDB:267598"
- },
- {
- "id": 611,
- "tag": "NEST"
- },
- {
- "id": 620,
- "tag": "Python"
- }
- ],
- "timestamp_created": "2024-01-12 10:21:30.533116+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/267598",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1807": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 1807,
- "name": "Cholinergic Modulation Shifts the Response of CA1 Pyramidal Cells to Depolarizing Ramps via TRPM4 Channels with Potential Implications for Place Cell Firing (Combe et al., 2023)",
- "repository_type": "github",
- "summary": "Model of Cholinergic modulation of a CA1 pyramidal cell through TRPM4, includes a nanodomain",
- "tags": [
- {
- "id": 2427,
- "tag": "I TRPM4"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2428,
- "tag": "ModelDB:267599"
- },
- {
- "id": 577,
- "tag": "NEURON"
- }
- ],
- "timestamp_created": "2024-01-12 10:21:31.048385+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/267599",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1808": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 1808,
- "name": "Heterogeneous axon model (Zang et al, accepted)",
- "repository_type": "github",
- "summary": "The Na+ channels that are important for action potentials show rapid inactivation, a state in which they do not conduct, although the membrane potential remains depolarized. Rapid inactivation is a determinant of millisecond scale phenomena, such as spike shape and refractory period. Na+ channels also inactivate orders of magnitude more slowly, and this slow inactivation has impacts on excitability over much longer time scales than those of a single spike or a single inter-spike interval. Here, we focus on the contribution of slow inactivation to the resilience of axonal excitability when ion channels are unevenly distributed along the axon. We study models in which the voltage-gated Na+ and K+ channels are unevenly distributed along axons with different variances, capturing the heterogeneity that biological axons display. In the absence of slow inactivation, many conductance distributions result in spontaneous tonic activity. Faithful axonal propagation is achieved with the introduction of Na+ channel slow inactivation. This \u201cnormalization\u201d effect depends on relations between the kinetics of slow inactivation and the firing frequency. Consequently, neurons with characteristically different firing frequencies will need to implement different sets of channel properties to achieve resilience. The results of this study demonstrate the importance of the intrinsic biophysical properties of ion channels in normalizing axonal function.",
- "tags": [
- {
- "id": 727,
- "tag": "Action Potential Initiation"
- },
- {
- "id": 728,
- "tag": "Axonal Action Potentials"
- },
- {
- "id": 745,
- "tag": "Conduction failure"
- },
- {
- "id": 591,
- "tag": "I K,leak"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 747,
- "tag": "I_KD"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2429,
- "tag": "ModelDB:267610"
- },
- {
- "id": 577,
- "tag": "NEURON"
- }
- ],
- "timestamp_created": "2024-01-12 10:21:31.807180+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/267610",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1809": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 1809,
- "name": "On the long time behaviour of single stochastic Hodgkin-Huxley neurons (H\u00f6pfner 2023)",
- "repository_type": "github",
- "summary": "This is the R program associated to the paper \r\nR. Hoepfner \r\nOn the long time behaviour of \r\nsingle stochastic Hodgkin-Huxley neurons with constant signal, \r\nand a construction of circuits of interacting neurons \r\nshowing self-organized rhythmic interactions \r\nMathematical Neuroscience and Applications, to appear \r\narXiv:2203:16160 ",
- "tags": [
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2430,
- "tag": "ModelDB:267611"
- },
- {
- "id": 1754,
- "tag": "R"
- },
- {
- "id": 1576,
- "tag": "Stochastic simulation"
- }
- ],
- "timestamp_created": "2024-01-12 10:21:32.338108+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/267611",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1810": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 1810,
- "name": "Dendritic mechanisms underlying the formation of a Place Cell (Mazzara et al. 2023)",
- "repository_type": "github",
- "summary": "Dendritic mechanisms underlying the formation of a Place Cell (Mazzara et al. 2023)",
- "tags": [
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2431,
- "tag": "ModelDB:267613"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 799,
- "tag": "Place cell/field"
- }
- ],
- "timestamp_created": "2024-01-12 10:21:32.895052+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/267613",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1811": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 1811,
- "name": "HH-type model of fast-spiking parvalbumin interneurons in spinal dorsal horn (Ma et al, 2023)",
- "repository_type": "github",
- "summary": "This code is a Hodgkin-Huxley type model of parvalbumin-expressing interneurons (PVINs) in the dorsal horn of the spinal cord. This model is adopted from Bischop et al. 2012 and reparametrized to fit the electrical activity of spinal dorsal horn PVINs from naive mice. It reproduces the firing behavior change from tonic to transient observed in PVINs following nerve injury, which is achieved by a reduction in cytosolic calcium buffer concentration. The bifurcation analysis of PVIN model further explains how the firing pattern transits as the injection current increases, in a manner similar to that seen in our transient firing PVIN recordings. The code also includes an \u201cin vivo-like\u201d neural circuit model of A\u00df fiber-mediate nociceptive neural circuit. The circuit model is stimulated by Poisson-distributed excitatory synaptic currents representing the presynaptic inputs from the A\u00df fibers. It includes the PVIN model above and another HH type model describing the excitability of a PVIN post-synaptic target: the excitatory interneuron expressing protein kinase C gamma (PKCgIN). The A\u00df fiber-like presynaptic current was applied on both the inhibitory PVIN model and the excitatory PKCgIN model, the latter of which also received inhibitory synaptic input from the PVIN model.",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 804,
- "tag": "Bifurcation"
- },
- {
- "id": 572,
- "tag": "Calcium dynamics"
- },
- {
- "id": 2325,
- "tag": "Excitability"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 567,
- "tag": "Ion Channel Kinetics"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2432,
- "tag": "ModelDB:267614"
- },
- {
- "id": 2323,
- "tag": "Pain processing"
- },
- {
- "id": 777,
- "tag": "Spike Frequency Adaptation"
- },
- {
- "id": 1576,
- "tag": "Stochastic simulation"
- },
- {
- "id": 759,
- "tag": "XPPAUT"
- }
- ],
- "timestamp_created": "2024-01-12 10:21:33.476870+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/267614",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1812": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 1812,
- "name": "Activity-dependent broadening of axonal spikes by inactivating K channels (Zheng & Kamiya 2023)",
- "repository_type": "github",
- "summary": "\"Simulation of use-dependent changes in axonal K and Ca currents during action potentials propagating along hippocampal mossy fibers. The model resembling inactivating axonal K current caused a broadening of action potentials, while replacement with a non-inactivating model abolished the use-dependent changes.\"\r\nReference:\r\n1. Zheng F, Kamiya H (2023) Simulation test for impartment of use-dependent plasticity by inactivation of axonal potassium channels on hippocampal mossy fibers. Front Cell Neurosci doi: 10.3389/fncel.2023.1154910",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 2401,
- "tag": "Analog coding"
- },
- {
- "id": 728,
- "tag": "Axonal Action Potentials"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 721,
- "tag": "I N"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 844,
- "tag": "I R"
- },
- {
- "id": 742,
- "tag": "I p,q"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2433,
- "tag": "ModelDB:267617"
- },
- {
- "id": 577,
- "tag": "NEURON"
- }
- ],
- "timestamp_created": "2024-01-12 10:21:34.112003+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/267617",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1813": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 1813,
- "name": "Hybrid NEURON-COMSOL sciatic nerve model with extracellular TIME stimulation (Xie et al, accepted)",
- "repository_type": "github",
- "summary": "A toolkit that automates the NEURON-to-COMSOL and COMSOL-to-NEURON pipeline. It converts a NEURON nerve model to a COMSOL nerve model. It uses TIME electrode to extracellularly stimulate the nerve. It meshes and studies the COMSOL model, and exports the generated extracellular voltage values to the NEURON model. The generated COMSOL model consists of a cubic simulation box. Inside the simulation box is a cylindrical nerve defined by users. The nerve consists of cylindrical fascicles, which consist of cylindrical fibres. A TIME electrode is inserted transversally into the nerve. The TIME electrode consists of a cuboid substrate of type P25N Polyimide and a cylindrical stimulating electrode recessed at its centre. Orientation is towards x-axis. Unit of length is in micrometre. ",
- "tags": [
- {
- "id": 1826,
- "tag": "COMSOL"
- },
- {
- "id": 734,
- "tag": "Extracellular Fields"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2434,
- "tag": "ModelDB:267618"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 620,
- "tag": "Python"
- }
- ],
- "timestamp_created": "2024-01-12 10:21:34.668725+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/267618",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1814": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 1814,
- "name": "LIP and FEF rhythmic attention model (Aussel et al. 2023)",
- "repository_type": "github",
- "summary": "This model investigates how theta-rhythmic performance in an attentional task can emerge from the dynamics of the Lateral IntraParietal area (LIP) and the Frontal Eye Fields (FEF) when stimulated by the medial-dorsal pulvinar.",
- "tags": [
- {
- "id": 2255,
- "tag": "Brian 2"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 580,
- "tag": "I M"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2435,
- "tag": "ModelDB:267619"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- }
- ],
- "timestamp_created": "2024-01-12 10:21:35.235749+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/267619",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1815": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 1815,
- "name": "A single compartment model of Drosophila motor neuron (Megwa et al 2023)",
- "repository_type": "github",
- "summary": "This is a single compartment model aparted from Drosophilia larval crawl motor neuron data as described in\r\nMegwa, Pascual, Gunay, Pulver, Prinz (2023). The model contains Fast and Slow Potassium currents, Transient and Persistent Sodium Currents, Sodium and Potassium Leak Currents, and a NA/K Pump. No Calcium and Potassium concentrations aren't tracked.",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 566,
- "tag": "Bursting"
- },
- {
- "id": 2211,
- "tag": "Electrical-chemical"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 591,
- "tag": "I K,leak"
- },
- {
- "id": 1532,
- "tag": "I Na, leak"
- },
- {
- "id": 739,
- "tag": "I Na,p"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 783,
- "tag": "I_Ks"
- },
- {
- "id": 1478,
- "tag": "Information transfer"
- },
- {
- "id": 729,
- "tag": "Invertebrate"
- },
- {
- "id": 2122,
- "tag": "Membrane Properties"
- },
- {
- "id": 2436,
- "tag": "Memory"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2437,
- "tag": "ModelDB:267620"
- },
- {
- "id": 740,
- "tag": "Na/K pump"
- },
- {
- "id": 620,
- "tag": "Python"
- },
- {
- "id": 569,
- "tag": "Simplified Models"
- },
- {
- "id": 741,
- "tag": "Sodium pump"
- }
- ],
- "timestamp_created": "2024-01-12 10:21:35.857819+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/267620",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1816": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 1816,
- "name": "LP neuron model database (Zang and Marder 2023)",
- "repository_type": "github",
- "summary": "Biological neurons show significant cell-to-cell variability but have the striking ability to maintain their key firing properties in the face of unpredictable perturbations and stochas- tic noise. Using a population of multi-compartment models consisting of soma, neurites, and axon for the lateral pyloric neuron in the crab stomatogastric ganglion, we explored how rebound bursting is preserved when the 14 channel conductances in each model are all randomly varied. The coupling between the axon and other compartments is critical for the ability of the axon to spike during bursts and consequently determines the set of successful solutions. When the coupling deviates from a biologically realistic range, the neuronal tolerance of conductance variations is lessened. Thus, the gross morphological features of these neurons enhance their robustness to perturbations of channel densities and expand the space of individual variability that can maintain a desired output pattern.",
- "tags": [
- {
- "id": 566,
- "tag": "Bursting"
- },
- {
- "id": 729,
- "tag": "Invertebrate"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2438,
- "tag": "ModelDB:267621"
- },
- {
- "id": 577,
- "tag": "NEURON"
- }
- ],
- "timestamp_created": "2024-01-12 10:21:36.436268+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/267621",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1817": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 1817,
- "name": "Biophysically Realistic Network Model of the Wild-Type and Degenerate Retina (Ly et al 2022)",
- "repository_type": "github",
- "summary": "Please read the readme.txt file before running any code.\r\n\r\nObjective: A major reason for poor visual outcomes provided by existing retinal prostheses is the limited knowledge of the impact of photoreceptor loss on retinal remodelling and its subsequent impact on neural responses to electrical stimulation. Computational network models of the neural retina assist in the understanding of normal retinal function but can be also useful for investigating diseased retinal responses to electrical stimulation. \r\nApproach: We developed and validated a biophysically detailed discrete neuronal network model of the retina in the software package NEURON. The model includes rod and cone photoreceptors, ON and OFF bipolar cell pathways, amacrine and horizontal cells and finally, ON and OFF retinal ganglion cells with detailed network connectivity and neural intrinsic properties. By accurately controlling the network parameters, we simulated the impact of varying levels of degeneration on retinal electrical function.\r\nMain results: Our model was able to reproduce characteristic monophasic and biphasic oscillatory patterns seen in ON and OFF neurons during retinal degeneration. Oscillatory activity occurred at 3 Hz with partial photoreceptor loss and at 6 Hz when all photoreceptor input to the retina was removed. Oscillations were found to gradually weaken, then disappear when synapses and gap junctions were destroyed in the inner retina. Without requiring any changes to intrinsic cellular properties of individual inner retinal neurons, our results suggest that changes in connectivity alone were sufficient to give rise to neural oscillations during photoreceptor degeneration, and significant network connectivity destruction in the inner retina terminated the oscillations.\r\nSignificance: Our results provide a platform for further understanding physiological retinal changes with progressive photoreceptor and inner retinal degeneration. Furthermore, our model can be used to guide future stimulation strategies for retinal prostheses to benefit patients at different stages of disease progression, particularly in the early and mid-stages of retinal degeneration.",
- "tags": [
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- "id": 564,
- "tag": "ModelDB"
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- "id": 726,
- "tag": "Vision"
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- "timestamp_created": "2024-01-12 10:21:36.952958+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/267646",
- "user": {
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- "id": 1818,
- "name": "FNS spiking neural simulator; LIFL neuron model, event-driven simulation (Susi et al 2021)",
- "repository_type": "github",
- "summary": "FNS is an event-driven Spiking Neural Network simulator, oriented to data-driven simulations.\r\nFNS combines spiking/synaptic level description with the event-driven approach, allowing the user to define heterogeneous modules and multi-scale connectivity with delayed connections and plastic synapses, providing fast simulations at the same time. A novel parallelization strategy is also implemented in order to further speed up simulations.\r\nFNS is based on the Leaky-Integrate and Fire with Latency (LIFL) spiking neuron model, that combines some realistic neurocomputational features to low computational complexity.\r\nFNS is written in Java, distributed as open source and protected by the GPL license.",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 1527,
- "tag": "Brain Rhythms"
- },
- {
- "id": 855,
- "tag": "Connectivity matrix"
- },
- {
- "id": 2440,
- "tag": "FNS Neural Simulator"
- },
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- "id": 778,
- "tag": "Java"
- },
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- "id": 564,
- "tag": "ModelDB"
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- "id": 2441,
- "tag": "ModelDB:267647"
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- {
- "id": 802,
- "tag": "STDP"
- }
- ],
- "timestamp_created": "2024-01-12 10:21:37.484468+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/267647",
- "user": {
- "email": "info@opensourcebrain.org",
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- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
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- "id": 1819,
- "name": "DRG nociceptors from wild-type and Fhf2-KO mice. Fhf2 gene knockout blocks heat nociception. (Marra et al., 2023)",
- "repository_type": "github",
- "summary": "We employ electrophysiological and computational methods to show that the heat nociception deficit in Fhf2 knockout mice can be explained by the combined effects of elevated temperature and FHF2 deficiency on the fast inactivation gating of Na v 1.7 and tetrodotoxin-resistant sodium channels expressed in dorsal root ganglion C-fibers.",
- "tags": [
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- "id": 736,
- "tag": "Action Potentials"
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- "id": 583,
- "tag": "I Calcium"
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- "id": 584,
- "tag": "I Potassium"
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- "id": 582,
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- "id": 2442,
- "tag": "ModelDB:267661"
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- "id": 775,
- "tag": "Nociception"
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- "id": 1823,
- "tag": "Temperature"
- }
- ],
- "timestamp_created": "2024-01-12 10:21:38.021202+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/267661",
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- "id": 1820,
- "name": "A model of ASIC1a and synaptic cleft pH modulating wind-up in wide dynamic range neurons (Delrocq)",
- "repository_type": "github",
- "summary": "We introduce a model of ASIC1a homomeric (and heteromeric) ion channel inserted into a pre-existing model of wide dynamic range (WDR) neuron of the spinal cord together with a novel synaptic cleft acidification mechanism. This computational model shows a dual contribution of the ASIC1a channels to wind-up, a facilitation mechanism of WDR neurons, which has been verified experimentally: inhibiting or maximally activating ASICs reduce wind-up. The wind-up inhibition by activation of ASICs is likely mediated by calcium influx and calcium-activated potassium channels.",
- "tags": [
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 723,
- "tag": "Facilitation"
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- "id": 583,
- "tag": "I Calcium"
- },
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- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 567,
- "tag": "Ion Channel Kinetics"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2443,
- "tag": "ModelDB:267666"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 2323,
- "tag": "Pain processing"
- },
- {
- "id": 620,
- "tag": "Python"
- }
- ],
- "timestamp_created": "2024-01-12 10:21:38.562164+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/267666",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "content_types": "modeling",
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- "id": 1821,
- "name": "The STN-GPe network; subthalamic nucleus, prototypic GPe, and arkypallidal GPe neurons (Kitano 2023)",
- "repository_type": "github",
- "summary": "The STN-GPe network; subthalamic nucleus, prototypic GPe, and arkypallidal GPe neurons (Kitano 2023)",
- "tags": [
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 730,
- "tag": "I A, slow"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 739,
- "tag": "I Na,p"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 575,
- "tag": "I T low threshold"
- },
- {
- "id": 594,
- "tag": "I h"
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- "id": 784,
- "tag": "KCNQ1"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2444,
- "tag": "ModelDB:267669"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 801,
- "tag": "Parkinson's"
- }
- ],
- "timestamp_created": "2024-01-12 10:21:39.149882+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/267669",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "1822": {
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- "content_types": "modeling",
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- ],
- "default_context": "main",
- "id": 1822,
- "name": "CA1 pyr cell: phenomenological NMDAR-based model of synaptic plasticity (Dainauskas et al 2023)",
- "repository_type": "github",
- "summary": "This Python code implements a phenomenological NMDA receptor-based voltage-dependent model of synaptic plasticity for CA3-CA1 synapse and shows weight changes of a synapse placed on a two-compartmental model of a hippocampal CA1 pyramidal neuron for spike-timing-dependent synaptic plasticity (STDP) and frequency-dependent synaptic plasticity stimulation protocols. The developed model predicts altered learning rules in synapses formed on the apical dendrites of the detailed compartmental model of CA1 pyramidal neuron in the presence of the GluN2B-NMDA receptor hypofunction.",
- "tags": [
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2445,
- "tag": "ModelDB:267680"
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- {
- "id": 620,
- "tag": "Python"
- },
- {
- "id": 802,
- "tag": "STDP"
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- {
- "id": 725,
- "tag": "Synaptic Plasticity"
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- ],
- "timestamp_created": "2024-01-12 10:21:39.690466+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/267680",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "id": 1823,
- "name": "Single neuron models of four types of L1 mouse Interneurons: Canpy, NGFC, alpha7 and VIP cells",
- "repository_type": "github",
- "summary": "Neocortical Layer 1 (L1) consists of the distal dendrites of pyramidal cells and GABAergic interneurons (INs) and receives extensive long-range \u201ctop-down\u201d projections, but L1 INs remain poorly understood. In this work, we systematically examined the distinct dominant electrophysiological features for four unique IN subtypes in L1 that were previously identified from mice of either gender: Canopy cells\r\nshow an irregular firing pattern near rheobase; Neurogliaform cells (NGFCs) are\r\nlate-spiking, and their firing rate accelerates during current injections; cells with strong\r\nexpression of the a7 nicotinic receptor (a7 cells), display onset (rebound) bursting;\r\nvasoactive intestinal peptide (VIP) expressing cells exhibit high input resistance, strong\r\nadaptation, and irregular firing. Computational modeling revealed that these diverse\r\nneurophysiological features could be explained by an extended\r\nexponential-integrate-and-fire neuron model with varying contributions of a slowly\r\ninactivating K+ channel (SIK), a T-type Ca2+ channel, and a spike-triggered\r\nCa2+-dependent K+ channel. In particular, we show that irregular firing results from\r\nsquare-wave bursting through a fast-slow analysis. Furthermore, we demonstrate that\r\nirregular firing is frequently observed in VIP cells due to the interaction between strong\r\nadaptation and a SIK channel. At last, we reveal that the VIP and a7 cell models\r\nresonant with Alpha/Theta band input through a dynamic gain analysis.",
- "tags": [
- {
- "id": 2255,
- "tag": "Brian 2"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 575,
- "tag": "I T low threshold"
- },
- {
- "id": 564,
- "tag": "ModelDB"
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- {
- "id": 2446,
- "tag": "ModelDB:267682"
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- "timestamp_created": "2024-01-12 10:21:40.235055+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/267682",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "id": 1824,
- "name": "Theta-gamma phase amplitude coupling in a hippocampal CA1 microcircuit (Ponzi et al. 2023)",
- "repository_type": "github",
- "summary": "Using a data-driven model of a hippocampal microcircuit, we demonstrate that theta-gamma phase amplitude coupling (PAC) can naturally emerge from a single feedback mechanism involving an inhibitory and excitatory neuron population, which interplay to generate theta frequency periodic bursts of higher frequency gamma..",
- "tags": [
- {
- "id": 1684,
- "tag": "Ca pump"
- },
- {
- "id": 1799,
- "tag": "Gamma oscillations"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 731,
- "tag": "I CAN"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 589,
- "tag": "I L high threshold"
- },
- {
- "id": 580,
- "tag": "I M"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 575,
- "tag": "I T low threshold"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 747,
- "tag": "I_KD"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2447,
- "tag": "ModelDB:267686"
- },
- {
- "id": 659,
- "tag": "NetPyNE"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 2384,
- "tag": "Theta oscillations"
- }
- ],
- "timestamp_created": "2024-01-12 10:21:40.800700+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/267686",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1825": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 1825,
- "name": "Stoney vs Histed: Quantifying spatial effects of intracortical microstims (Kumaravelu et al 2022)",
- "repository_type": "github",
- "summary": "\"...We implemented a biophysically-based computational model of a cortical column comprising neurons with realistic morphology and representative synapses. We quantified the spatial effects of single pulses and short trains of ICMS, including the volume of activated neurons and the density of activated neurons as a function of stimulation intensity...\"",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 1710,
- "tag": "Intracortical Microstimulation"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
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- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2448,
- "tag": "ModelDB:267691"
- },
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- "id": 577,
- "tag": "NEURON"
- }
- ],
- "timestamp_created": "2024-01-12 10:21:41.328373+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/267691",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 1826,
- "name": "Human and mouse Purkinje cell models (Masoli et al., 2024)",
- "repository_type": "github",
- "summary": "New Purkinje cell models based on Masoli et al. 2015 and 2017. \r\nThe main differences are: mouse and human morphologies.\r\nRevised ionic channels distribution",
- "tags": [
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2449,
- "tag": "ModelDB:267694"
- },
- {
- "id": 577,
- "tag": "NEURON"
- }
- ],
- "timestamp_created": "2024-01-12 10:21:41.838072+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/267694",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1827": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 1827,
- "name": "Aplysia LTF model (Liu et al, 2020; Zhang et al, 2021; Liu et al 2022)",
- "repository_type": "github",
- "summary": "Aplysia LTF model (Liu et al, 2020; Zhang et al, 2021; Liu et al 2022)",
- "tags": [
- {
- "id": 2436,
- "tag": "Memory"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2450,
- "tag": "ModelDB:267695"
- },
- {
- "id": 759,
- "tag": "XPPAUT"
- }
- ],
- "timestamp_created": "2024-01-12 10:21:42.357705+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/267695",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1828": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 1828,
- "name": "Glial voltage dynamics driven by Kir & K2P currents (Janjic et al 2023)",
- "repository_type": "github",
- "summary": "The almost linear current-voltage relationship of most glial membranes results from multiple non-linear potassium leaky-pore or background conductances. The corresponding channel types develop and deregulate independently, some of them asymmetrically \u2013 producing non-monotonic I-V curves. The consequences of those alterations on whole-cell voltage responses have not been explored. We developed a minimal ordinary differential equation model of voltage dynamics incorporating detailed models of the different potassium currents based on electrophysiological recordings. Parametrically inducing some of the reported changes in rectification of glial Kir currents resulted in instability of the nominal resting membrane potential and the appearance of a second, much more depolarized resting state. If prolonged glial depolarizations prove plausible such bistability would change the present understanding of glial Vm dynamics.",
- "tags": [
- {
- "id": 804,
- "tag": "Bifurcation"
- },
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 1931,
- "tag": "Kir"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2451,
- "tag": "ModelDB:267696"
- },
- {
- "id": 759,
- "tag": "XPPAUT"
- }
- ],
- "timestamp_created": "2024-01-12 10:21:43.021657+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/267696",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1829": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 1829,
- "name": "Relating anatomical and biophysical properties to motoneuron excitabilty (Moustafa et al. 2023)",
- "repository_type": "github",
- "summary": "Nonlinear dynamical analysis of spinal motoneuron reveals effects of SK, CaL channels, and cell morphology on excitability, with implications for pathophysiology of ALS.\r\n\r\n\r\n",
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- "id": 804,
- "tag": "Bifurcation"
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- "id": 2325,
- "tag": "Excitability"
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- "id": 581,
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- "id": 589,
- "tag": "I L high threshold"
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- "id": 721,
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- "id": 582,
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- "tag": "IK Skca"
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- "id": 569,
- "tag": "Simplified Models"
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- "timestamp_created": "2024-01-12 10:21:43.565516+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/267710",
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- "id": 1830,
- "name": "Dorsal Column Fiber Stimulation model (Gilbert et al. 2022)",
- "repository_type": "github",
- "summary": "This model was used in Gilbert et al. 2022. This model was used to estimate rat dorsal column fiber responses to epidural spinal cord stimulation pulses.",
- "tags": [
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- "id": 578,
- "tag": "Activity Patterns"
- },
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- "id": 564,
- "tag": "ModelDB"
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- "tag": "ModelDB:267728"
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- "tag": "Python"
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- "timestamp_created": "2024-01-12 10:21:44.105825+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/267728",
- "user": {
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- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
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- "id": 1831,
- "name": "Biochemical Systems Theory Model of TNFa related pathways (Sasidharakurup and Diwakar 2020)",
- "repository_type": "github",
- "summary": "\"In this study, a computational model of AD and PD have been modelled using biochemical systems theory, and shows how Tumour Necrosis Factor alpha (TNFa) regulated neuroinflammation, oxidative stress and insulin pathways can dysregulate its downstream signalling cascade that lead to neurodegeneration observed in AD and PD. The experimental data for initial conditions for this model and validation of the model was based on data reported in literature. In simulations, elevations in the aggregations of major proteins involved in the pathology of AD and PD including amyloid beta, alpha synuclein, tau have been modelled. Abnormal aggregation of these proteins and hyperphosphorylation of tau were observed in the model\"",
- "tags": [
- {
- "id": 827,
- "tag": "Aging/Alzheimer`s"
- },
- {
- "id": 1662,
- "tag": "Apoptosis"
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- "id": 2454,
- "tag": "CellDesigner"
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- "tag": "ModelDB:267735"
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- "id": 801,
- "tag": "Parkinson's"
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- "timestamp_created": "2024-01-12 10:21:44.616509+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/267735",
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- "name": "Biochemical Systems Theory Model of SARS-CoV-2 infection network (Sasidharakurup et al., 2021)",
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- "summary": "\"We report here a mathematical model of SARS-CoV-2 infection pathway network with cytokine storm, oxidative stress, thrombosis, insulin resistance, and nitric oxide (NO) pathways. The biochemical systems theory model shows autocrine loops with positive feedback enabling excessive immune response, cytokines, transcription factors, and interferons, which can imbalance homeostasis of the system.\"",
- "tags": [
- {
- "id": 2456,
- "tag": "COVID-19"
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- "id": 2454,
- "tag": "CellDesigner"
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- "id": 751,
- "tag": "Signaling pathways"
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- "timestamp_created": "2024-01-12 10:21:45.146973+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/267736",
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- "name": "A computational model for fast skeletal muscle (Kim and Heckman, accepted)",
- "repository_type": "github",
- "summary": "A computational framework for investigating the dynamic variation in the calcium-force relationship during force generation under physiological conditions of neural excitation and muscle length in intact fast skeletal muscles",
- "tags": [
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- "id": 564,
- "tag": "ModelDB"
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- {
- "id": 2458,
- "tag": "ModelDB:267738"
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- "id": 1966,
- "tag": "Motor control"
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- "id": 577,
- "tag": "NEURON"
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- "timestamp_created": "2024-01-12 10:21:45.773992+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/267738",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "id": 1834,
- "name": "CA1 pyramidal populations after high frequency head impacts (Chapman, et al., 2023)",
- "repository_type": "github",
- "summary": "\"... we generated in silico models of CA1 pyramidal neurons from current clamp data of control mice and mice that sustained HFHI. We use a directed evolution algorithm with a crowding penalty to generate a large and unbiased population of plausible models for each group that approximated the experimental features. The HFHI neuron model population showed decreased voltage gated sodium conductance and a general increase in potassium channel conductance. We used partial least squares regression analysis to identify combinations of channels that may account for CA1 hypoexcitability after HFHI. The hypoexcitability phenotype in models was linked to A- and M-type potassium channels in combination, but not by any single channel correlations. We provide an open access set of CA1 pyramidal neuron models for both control and HFHI conditions that can be used to predict the effects of pharmacological interventions in TBI models.\"",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
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- "id": 731,
- "tag": "I CAN"
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- "id": 583,
- "tag": "I Calcium"
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- {
- "id": 581,
- "tag": "I K,Ca"
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- "id": 580,
- "tag": "I M"
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- {
- "id": 584,
- "tag": "I Potassium"
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- "id": 582,
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- "tag": "ModelDB:267742"
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- "id": 577,
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- "id": 2461,
- "tag": "eFEL"
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- "id": 2592,
- "tag": "BluePyOpt"
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- "timestamp_created": "2024-01-12 10:21:46.555817+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/267742",
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- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
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- "id": 1835,
- "name": "Hippocampus CA1 OLM cell multicompartment conductance-based model (Sun et al. 2023)",
- "repository_type": "github",
- "summary": "Referred to as FULL in the reference paper. Is a multicompartment conductance-based model, with simplified calcium buffering and diffusion compared to the previous iteration.",
- "tags": [
- {
- "id": 1606,
- "tag": "Conductance distributions"
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- {
- "id": 1983,
- "tag": "Conductances estimation"
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- {
- "id": 590,
- "tag": "I A"
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- {
- "id": 581,
- "tag": "I K,Ca"
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- {
- "id": 580,
- "tag": "I M"
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- "id": 574,
- "tag": "I Na,t"
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- "id": 594,
- "tag": "I h"
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- "id": 747,
- "tag": "I_KD"
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- "id": 564,
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- "id": 2462,
- "tag": "ModelDB:267754"
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- "id": 577,
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- "id": 620,
- "tag": "Python"
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- ],
- "timestamp_created": "2024-01-12 10:21:47.163638+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/267754",
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- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
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- "default_context": "main",
- "id": 1836,
- "name": "Role of synchrony in sensation and the basis for paresthesia-free spinal cord stimulation (Sagalajev et al., 2024)",
- "repository_type": "github",
- "summary": "We showed that DC axons are activated synchronously during c-SCS (50 Hz) and asynchronously during kf-SCS. Through experiments and computational simulations, we explained the basis for and consequences of desynchronization, showing that asynchronous spikes are sufficient to mediate pain relief whereas synchronous spikes are necessary for paresthesia.",
- "tags": [
- {
- "id": 655,
- "tag": "MATLAB"
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- {
- "id": 564,
- "tag": "ModelDB"
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- "id": 2463,
- "tag": "ModelDB:267768"
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- "id": 577,
- "tag": "NEURON"
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- "id": 620,
- "tag": "Python"
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- {
- "id": 586,
- "tag": "Synchronization"
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- "id": 659,
- "tag": "NetPyNE"
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- "timestamp_created": "2024-01-12 10:21:47.712206+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/267768",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "default_context": "main",
- "id": 1837,
- "name": "Estimating the effects of slicing on the electrophysiological properties of spinal motoneurons under normal and disease conditions (Mousa and Elbasiouny 2021)",
- "repository_type": "github",
- "summary": "Although slice recordings from motoneurons are being widely used, the effects of slicing on the measured motoneuron electrical properties under normal and disease conditions have not been assessed. Using high-fidelity cell models of neonatal WT and SOD cells, we examined the effects of slice thickness, soma position within the slice, and slice orientation. Our results offer information that enhances the rigor of MN electrophysiological data measured from the slice preparation under normal and disease conditions.",
- "tags": [
- {
- "id": 579,
- "tag": "Active Dendrites"
- },
- {
- "id": 2325,
- "tag": "Excitability"
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- {
- "id": 564,
- "tag": "ModelDB"
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- "id": 2464,
- "tag": "ModelDB:2001735"
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- "id": 1966,
- "tag": "Motor control"
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- "id": 577,
- "tag": "NEURON"
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- "timestamp_created": "2024-01-12 10:21:48.323763+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/2001735",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "content_types": "modeling",
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- "default_context": "main",
- "id": 1838,
- "name": "Tutorial: Using NEURON for Neuromechanical Simulations (Fietkiewicz et al., 2023)",
- "repository_type": "github",
- "summary": "Multiple models demonstrate concepts for neuromechanical simulations using pointers. Includes graphical interfaces that can be used to learn and verify pointer syntax.",
- "tags": [
- {
- "id": 566,
- "tag": "Bursting"
- },
- {
- "id": 572,
- "tag": "Calcium dynamics"
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- "id": 756,
- "tag": "Methods"
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- "id": 564,
- "tag": "ModelDB"
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- "id": 2465,
- "tag": "ModelDB:2014814"
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- "id": 577,
- "tag": "NEURON"
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- "id": 1536,
- "tag": "Respiratory control"
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- "id": 732,
- "tag": "Tutorial/Teaching"
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- ],
- "timestamp_created": "2024-01-12 10:21:48.933913+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/2014814",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "default_context": "main",
- "id": 1839,
- "name": "Different responses of mice and rats hippocampus CA1 pyramidal neurons to in vitro and in vivo-like inputs (vitale et al., 2023)",
- "repository_type": "github",
- "summary": "",
- "tags": [
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- "id": 736,
- "tag": "Action Potentials"
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- {
- "id": 1684,
- "tag": "Ca pump"
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- "id": 1606,
- "tag": "Conductance distributions"
- },
- {
- "id": 1983,
- "tag": "Conductances estimation"
- },
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- "id": 571,
- "tag": "Detailed Neuronal Models"
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- "id": 2325,
- "tag": "Excitability"
- },
- {
- "id": 731,
- "tag": "I CAN"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 747,
- "tag": "I_KD"
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- {
- "id": 567,
- "tag": "Ion Channel Kinetics"
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- "id": 564,
- "tag": "ModelDB"
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- "id": 2466,
- "tag": "ModelDB:2014816"
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- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 596,
- "tag": "Synaptic Integration"
- }
- ],
- "timestamp_created": "2024-01-12 10:21:49.531371+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/2014816",
- "user": {
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- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "1840": {
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- "content_types": "modeling",
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- "default_context": "main",
- "id": 1840,
- "name": "Minimal model for human ventricular action potentials (Bueno-Orovio et al 2008)",
- "repository_type": "github",
- "summary": "Modeling the dynamics of wave propagation in human ventricular tissue and studying wave stability require models that reproduce realistic characteristics in tissue. We present a minimal ventricular (MV) human model that is designed to reproduce important tissue-level characteristics of epicardial, endocardial and midmyocardial cells, including action potential (AP) amplitudes and morphologies, upstroke velocities, steady-state action potential duration (APD) and conduction velocity (CV) restitution curves, minimum APD, and minimum diastolic interval. The model is then compared with three previously published human ventricular cell models, the Priebe and Beuckelmann (PB), the Ten Tusscher-Noble-Noble-Panfilov (TNNP), and the Iyer-Mazhari-Winslow (IMW). For the first time, the stability of reentrant waves for all four models is analyzed, and quantitative comparisons are made among the models in single cells and in tissue. The PB, TNNP, and IMW models exhibit quantitative differences in APD and CV rate adaptation, as well as completely different reentrant wave dynamics of quasi-breakup, stability, and breakup, respectively. All the models have dominant frequencies comparable to clinical values except for the IMW model, which has a large range of frequencies extending beyond the clinical range for both ventricular tachycardia (VT) and ventricular fibrillation (VF). The TNNP and IMW models possess a large degree of short-term memory and we show for the first time the existence of memory in CV restitution. The MV model also can be fitted to reproduce the dynamics of other models and is computationally more efficient: the times required to simulate the MV, TNNP, PB and IMW models follow the ratio 1:31:50:8084.",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
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- "id": 564,
- "tag": "ModelDB"
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- "id": 2467,
- "tag": "ModelDB:2014817"
- },
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- "id": 759,
- "tag": "XPPAUT"
- }
- ],
- "timestamp_created": "2024-01-12 10:21:50.064479+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/2014817",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "default_context": "main",
- "id": 1841,
- "name": "Hippocampal synaptic plasticity in Alzheimer's disease (Dainauskas et al., 2023)",
- "repository_type": "github",
- "summary": "This model analyses altered hippocampal synaptic plasticity and its rescue under the Alzheimer's disease (AD) conditions, when the concentrations of AD-related peptides, such as the amyloid precursor protein intracellular domain (AICD) and amyloid beta (A\u03b2), are increased. The phenomenological NMDA receptor-based voltage-dependent model is used to model synaptic modifications at the CA3-CA1 synapses onto the multicompartmental CA1 pyramidal neuron. The modeling results show that partial blockade of Glu2NB-NMDAR-gated channel restores intrinsic excitability of a CA1 pyramidal neuron and rescues long-term potentiation in AICD and A\u03b2 conditions. The model is implemented in Python and NEURON.",
- "tags": [
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2468,
- "tag": "ModelDB:2014822"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 620,
- "tag": "Python"
- },
- {
- "id": 725,
- "tag": "Synaptic Plasticity"
- }
- ],
- "timestamp_created": "2024-01-12 10:21:50.588241+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/2014822",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1842": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 1842,
- "name": "ffian: Fluid Flow In Astrocyte Networks (S\u00e6tra et al. 2023)",
- "repository_type": "github",
- "summary": "ffian is an implementation of the KNP continuity equations for a one-dimensional system containing two compartments: one representing an astrocyte network (ICS) and one representing the extracellular space (ECS). ffian.The model takes both transmembrane- and compartmental fluid flow into account and predicts the evolution in time and distribution in space of the volume fractions, ion concentrations (Na+, K+, Cl-), electrical potentials, and hydrostatic pressures in the ICS and ECS.\r\n\r\nExample simulations and installation guidelines can be found here: https://github.com/martejulie/fluid-flow-in-astrocyte-networks",
- "tags": [
- {
- "id": 1624,
- "tag": "Cellular volume dynamics"
- },
- {
- "id": 2211,
- "tag": "Electrical-chemical"
- },
- {
- "id": 2335,
- "tag": "Electrodiffusion"
- },
- {
- "id": 75,
- "tag": "Homeostasis"
- },
- {
- "id": 1531,
- "tag": "I Cl, leak"
- },
- {
- "id": 1532,
- "tag": "I Na, leak"
- },
- {
- "id": 1931,
- "tag": "Kir"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2469,
- "tag": "ModelDB:2014830"
- },
- {
- "id": 740,
- "tag": "Na/K pump"
- },
- {
- "id": 1808,
- "tag": "Potassium buffering"
- },
- {
- "id": 620,
- "tag": "Python"
- }
- ],
- "timestamp_created": "2024-01-12 10:21:51.121580+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/2014830",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1843": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 1843,
- "name": "A neural network model of mathematics anxiety: The role of attention (Rose et al., 2023)",
- "repository_type": "github",
- "summary": "Anxiety about performing numerical calculations is becoming an increasingly important issue. Termed mathematics anxiety, this condition negatively impacts performance in numerical tasks which can affect education outcomes and future employment. The disruption account proposes poor performance is due to anxiety disrupting limited attentional and inhibitory resources leaving fewer cognitive resources for the current task. This study provides the first neural network model of math anxiety. The model simulates performance in two commonly-used tasks related to math anxiety: the numerical Stroop and symbolic number comparison. Different model modifications were used to simulate high and low math-anxious conditions by modifying attentional processes and learning; these model modifications address different theories of math anxiety. The model simulations suggest that math anxiety is associated with reduced attention to numerical stimuli. These results are consistent with the disruption account and the attentional control theory where anxiety decreases goal-directed attention and increases stimulus-driven attention. ",
- "tags": [
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2470,
- "tag": "ModelDB:2014833"
- }
- ],
- "timestamp_created": "2024-01-12 10:21:51.628757+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/2014833",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1844": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 1844,
- "name": "Exploring the role of K\u04e7lliker-Fuse nucleus in breathing variability via mathematical modeling (John et al., 2023)",
- "repository_type": "github",
- "summary": "We explore the dynamics of K\u04e7lliker-Fuse nucleus (KF), which is involved in regulating normal breathing, controlling active abdominal expiration during increased ventilation, and is also known to play a role in the development of breathing abnormalities associated with Rett syndrome (RTT). We present reduced computational models of the respiratory core neurons along with the KF unit that simulate both normal and RTT-like breathing patterns. These models provide a general framework for understanding KF dynamics and potential network interactions.",
- "tags": [
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 739,
- "tag": "I Na,p"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2471,
- "tag": "ModelDB:2014996"
- },
- {
- "id": 1536,
- "tag": "Respiratory control"
- },
- {
- "id": 759,
- "tag": "XPPAUT"
- }
- ],
- "timestamp_created": "2024-01-12 10:21:52.186027+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/2014996",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1845": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 1845,
- "name": "Frequency-dependent pattern separation in a biophysical model of the dentate gyrus, (Singh et al., 2023)",
- "repository_type": "github",
- "summary": "Background and Objectives: Mnemonic discrimination (MD) may be dependent on oscillatory perforant path input frequencies to the hippocampus in a \u201cU\u201d shaped fashion, where some studies show that slow and fast input frequencies support MD, while other studies show that intermediate frequencies disrupt MD. We hypothesise that pattern separation (PS) underlies frequency-dependent MD performance. We aim to study, in a computational model of the hippocampal dentate gyrus (DG), the network and cellular mechanisms governing this putative \u201cU\u201d shaped PS relationship. \r\nMethods: We implemented a biophysical model of the DG that produces the hypothesised \u201cU\u201d-shaped input frequency-PS relationship, and its associated oscillatory electrophysiological signatures. We subsequently evaluated the network\u2019s PS ability using an adapted spatiotemporal task. We undertook systematic lesion studies to identify the network-level mechanisms driving the \u201cU\u201d shaped input frequency-PS relationship. A minimal circuit of a single granule cell (GC) stimulated with oscillatory inputs was also used to study potential cellular-level mechanisms.\r\nResults: Lesioning synapses onto GCs did not impact the \u201cU\u201d-shaped input frequency-PS relationship. Furthermore, GC inhibition limits PS performance for fast frequency inputs, while enhancing PS for slow frequency inputs. GC interspike interval was found to be input frequency dependent in a \u201cU\u201d-shaped fashion, paralleling frequency-dependent PS observed at the network level. Additionally, GCs showed an attenuated firing response for fast frequency inputs.\r\nConclusions: Independent of network-level inhibition, GCs may intrinsically be capable of producing a \u201cU\u201d shaped input frequency-PS relationship. GCs may preferentially decorrelate slow and fast inputs via spike timing reorganisation and high frequency filtering. ",
- "tags": [
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2472,
- "tag": "ModelDB:2014998"
- },
- {
- "id": 577,
- "tag": "NEURON"
- }
- ],
- "timestamp_created": "2024-01-12 10:21:52.713722+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/2014998",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1846": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 1846,
- "name": "A multiscale predictive digital twin for neurocardiac modulation (Yang et al., 2023)",
- "repository_type": "github",
- "summary": "Cardiac function is tightly regulated by the autonomic nervous system (ANS). Activation of the sympathetic nervous system increases cardiac output by increasing heart rate and stroke volume, while parasympathetic nerve stimulation instantly slows heart rate. Importantly, imbalance in autonomic control of the heart has been implicated in the development of arrhythmias and heart failure. Understanding of the mechanisms and effects of autonomic stimulation is a major challenge because synapses in different regions of the heart result in multiple changes to heart function. For example, nerve synapses on the sinoatrial node (SAN) impact pacemaking, while synapses on contractile cells alter contraction and arrhythmia vulnerability. Here, we present a multiscale neurocardiac modelling and simulator tool that predicts the effect of efferent stimulation of the sympathetic and parasympathetic branches of the ANS on the cardiac SAN and ventricular myocardium. The model includes a layered representation of the ANS and reproduces firing properties measured experimentally. Model parameters are derived from experiments and atomistic simulations. The model is a first prototype of a digital twin that is applied to make predictions across all system scales, from subcellular signalling to pacemaker frequency to tissue level responses. We predict conditions under which autonomic imbalance induces proarrhythmia and can be modified to prevent or inhibit arrhythmia. In summary, the multiscale model constitutes a predictive digital twin framework to test and guide high-throughput prediction of novel neuromodulatory therapy. KEY POINTS: A multi-layered model representation of the autonomic nervous system that includes sympathetic and parasympathetic branches, each with sparse random intralayer connectivity, synaptic dynamics and conductance based integrate-and-fire neurons generates firing patterns in close agreement with experiment. A key feature of the neurocardiac computational model is the connection between the autonomic nervous system and both pacemaker and contractile cells, where modification to pacemaker frequency drives initiation of electrical signals in the contractile cells. We utilized atomic-scale molecular dynamics simulations to predict the association and dissociation rates of noradrenaline with the \u03b2-adrenergic receptor. Multiscale predictions demonstrate how autonomic imbalance may increase proclivity to arrhythmias or be used to terminate arrhythmias. The model serves as a first step towards a digital twin for predicting neuromodulation to prevent or reduce disease. ",
- "tags": [
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 755,
- "tag": "C or Cplusplus program"
- },
- {
- "id": 793,
- "tag": "Development"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2473,
- "tag": "ModelDB:2014999"
- }
- ],
- "timestamp_created": "2024-01-12 10:21:53.535610+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/2014999",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1847": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 1847,
- "name": "Cold-Temperature Coding with Bursting and Spiking Based on TRP Channel Dynamics in Drosophila Larva Sensory Neurons (Maksymchuk, N., A. Sakurai, D.N. Cox, and G.S. Cymbalyuk, 2023)",
- "repository_type": "github",
- "summary": "Temperature sensation involves thermosensitive TRP (thermoTRP) and non-TRP channels. Drosophila larval Class III (CIII) neurons serve as the primary cold nociceptors and express a suite of thermoTRP channels implicated in noxious cold sensation. Using this computational model, we explain the distinction in the occurrence of the two CIII cold-evoked patterns bursting and spiking using the dynamics of a thermoTRP current. A two-parameter activity map (Temperature, constant TRP current conductance) marks parameters that support silent, spiking, and bursting regimes. Projecting on the map the instantaneous TRP conductance, governed by activation and inactivation processes, reflects temperature coding responses as a path across silent, spiking, or bursting domains on the map. The map sheds light on how various parameter sets for TRP kinetics represent various types of cold-evoked responses. Our results indicate that bursting detects the high rate of temperature change, whereas tonic spiking could reflect both the rate of change and magnitude of steady cold temperature.",
- "tags": [
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 566,
- "tag": "Bursting"
- },
- {
- "id": 1500,
- "tag": "I trp"
- },
- {
- "id": 729,
- "tag": "Invertebrate"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2474,
- "tag": "ModelDB:2015412"
- },
- {
- "id": 775,
- "tag": "Nociception"
- },
- {
- "id": 821,
- "tag": "Sensory coding"
- },
- {
- "id": 1823,
- "tag": "Temperature"
- },
- {
- "id": 2475,
- "tag": "Temporal Coding"
- },
- {
- "id": 720,
- "tag": "Temporal Pattern Generation"
- }
- ],
- "timestamp_created": "2024-01-12 10:21:54.134158+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/2015412",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1848": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 1848,
- "name": "Transient and Steady-State Properties of Drosophila Sensory Neurons Coding Noxious Cold Temperature; (Maksymchuk, N., Sakurai, A., Cox, D. N., & Cymbalyuk, G. 2022) ",
- "repository_type": "github",
- "summary": "Coding noxious cold signals, such as the magnitude and rate of temperature change, play essential roles in the survival of organisms. We combined electrophysiological and computational neuroscience methods to investigate the neural dynamics of Drosophila larva cold-sensing Class III (CIII) neurons.\r\nWe developed a biophysical model of CIII neurons using a generalized description of transient receptor potential (TRP) current kinetics with temperature-dependent activation and Ca2+-dependent inactivation. This model recapitulated the key features of the spiking rate responses found in experiments and suggested mechanisms explaining the transient and steady-state activity of the CIII neurons at different cold temperatures and rates of their decrease and increase. We conclude that CIII neurons encode at least three types of cold sensory information: the rate of temperature decrease by a peak of the firing rate, the magnitude of cold temperature by the rate of steady spiking activity, and direction of temperature change by spiking activity augmentation or suppression corresponding to temperature decrease and increase, respectively. ",
- "tags": [
- {
- "id": 1500,
- "tag": "I trp"
- },
- {
- "id": 729,
- "tag": "Invertebrate"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2476,
- "tag": "ModelDB:2015413"
- },
- {
- "id": 775,
- "tag": "Nociception"
- },
- {
- "id": 821,
- "tag": "Sensory coding"
- },
- {
- "id": 1823,
- "tag": "Temperature"
- }
- ],
- "timestamp_created": "2024-01-12 10:21:54.686714+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/2015413",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1849": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 1849,
- "name": "Zebrafish Mauthner escape circuit with dopamine, gaba, and glycine (Clements et al., accepted)",
- "repository_type": "github",
- "summary": "We used zebrafish (Danio rerio) as a model organism to examine how social dominance influences the activation of swimming and the Mauthner mediated startle escape behaviors. We show that the status-dependent shift in behavior patterns whereby dominants increase swimming and reduce sensitivity of startle escape while subordinates reduce their swimming and increase startle sensitivity is regulated by the synergistic interactions of dopaminergic, glycinergic, and GABAergic inputs to shift the balance of activation of the underlying motor circuits. Neurocomputational modeling of the empirical results shows that drd1b functions as the molecular regulator to facilitate the shift between excitatory and inhibitory pathways. The results illustrate how reconfiguration in network dynamics serves as an adaptive strategy to cope with changes in the social environment and are likely conserved and applicable to other social species. \r\n\r\n",
- "tags": [
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2477,
- "tag": "ModelDB:2015414"
- },
- {
- "id": 759,
- "tag": "XPPAUT"
- }
- ],
- "timestamp_created": "2024-01-12 10:21:55.197354+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/2015414",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1850": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 1850,
- "name": "Hypothalamic CRH neurons represent physiological memory of positive and negative experience (F\u00fczesi et al., 2023)",
- "repository_type": "github",
- "summary": "Recalling a salient experience provokes specific behaviors and changes in the physiology or internal state. Relatively little is known about how physiological memories are encoded. Here we examined the neural substrates of physiological memory by probing CRHPVN neurons of mice, which control the endocrine response to stress. We demonstrate these cells show contextual memory following exposure to a stimulus with negative or positive valence. Specifically, a negative stimulus invokes a two-factor learning rule that favors an increase in the activity of weak cells during recall. In contrast, the contextual memory of positive valence relies on a one-factor rule to decrease the activity of all neurons. Finally, the aversive memory in CRHPVN neurons outlasts the behavioral response. These observations provide new information about how specific physiological memories of aversive and appetitive experiences are encoded and demonstrate that behavioral readouts may not accurately reflect physiological changes invoked by the memory of salient experiences.",
- "tags": [
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2478,
- "tag": "ModelDB:2015420"
- }
- ],
- "timestamp_created": "2024-01-12 10:21:55.716758+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/2015420",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1851": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 1851,
- "name": "Time-dependent homeostatic mechanisms underlie Brain-Derived Neurotrophic Factor action on neural circuitry (O'Neill, 2023)",
- "repository_type": "github",
- "summary": "",
- "tags": [
- {
- "id": 2255,
- "tag": "Brian 2"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2479,
- "tag": "ModelDB:2015421"
- }
- ],
- "timestamp_created": "2024-01-12 10:21:56.239966+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/2015421",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1852": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 1852,
- "name": "A biophysical model of thalamocortical network switching under propofol (Soplata et al., 2023)",
- "repository_type": "github",
- "summary": "This is a model of the cortex of (Benita et al., 2012), the thalamus of (Soplata et al., 2017), and simple AMPAergic thalamocortical and corticothalamic connections between them, built using the Matlab-based Dynasim simulator. We used this to investigate how slow wave and alpha oscillations interact under propofol anesthesia, including neuromodulatory changes.",
- "tags": [
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 1684,
- "tag": "Ca pump"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 591,
- "tag": "I K,leak"
- },
- {
- "id": 1532,
- "tag": "I Na, leak"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 575,
- "tag": "I T low threshold"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 861,
- "tag": "I_K,Na"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2480,
- "tag": "ModelDB:2015422"
- },
- {
- "id": 604,
- "tag": "Network"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 592,
- "tag": "Sleep"
- },
- {
- "id": 586,
- "tag": "Synchronization"
- }
- ],
- "timestamp_created": "2024-01-12 10:21:56.783963+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/2015422",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1853": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1853,
- "name": "A model for recurrent spreading depolarizations (Conte et al. 2017)",
- "repository_type": "github",
- "summary": "A detailed biophysical model for a neuron/astrocyte network is developed in order to explore mechanisms responsible for cortical spreading depolarizations. This includes a model for the Na+-glutamate transporter, which allows for a detailed description of reverse glutamate uptake. In particular, we consider the specific roles of elevated extracellular glutamate and K+ in the initiation, propagation and recurrence of spreading depolarizations.",
- "tags": [
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 1531,
- "tag": "I Cl, leak"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 739,
- "tag": "I Na,p"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2481,
- "tag": "ModelDB:235377"
- },
- {
- "id": 2482,
- "tag": "Na-glutamate transporter"
- },
- {
- "id": 740,
- "tag": "Na/K pump"
- },
- {
- "id": 1808,
- "tag": "Potassium buffering"
- },
- {
- "id": 2316,
- "tag": "Spreading depolarization"
- },
- {
- "id": 1899,
- "tag": "Spreading depression"
- },
- {
- "id": 759,
- "tag": "XPPAUT"
- }
- ],
- "timestamp_created": "2024-01-12 18:30:39.235596+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/235377",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1854": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1854,
- "name": "The origin of different spike and wave-like events (Hall et al 2017)",
- "repository_type": "github",
- "summary": "Acute In vitro models have revealed a great deal of information about\r\nmechanisms underlying many types of epileptiform activity. However,\r\nfew examples exist that shed light on spike and wave (SpW) patterns of\r\npathological activity. SpW are seen in many epilepsy syndromes, both\r\ngeneralised and focal, and manifest across the entire age\r\nspectrum. They are heterogeneous in terms of their severity, symptom\r\nburden and apparent anatomical origin (thalamic, neocortical or both),\r\nbut any relationship between this heterogeneity and underlying\r\npathology remains elusive. Here we demonstrate that physiological\r\ndelta frequency rhythms act as an effective substrate to permit\r\nmodelling of SpW of cortical origin and may help to address this\r\nissue.\r\n...\"",
- "tags": [
- {
- "id": 469,
- "tag": "Epilepsy"
- },
- {
- "id": 710,
- "tag": "FORTRAN"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 730,
- "tag": "I A, slow"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 589,
- "tag": "I L high threshold"
- },
- {
- "id": 580,
- "tag": "I M"
- },
- {
- "id": 739,
- "tag": "I Na,p"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 575,
- "tag": "I T low threshold"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2483,
- "tag": "ModelDB:235561"
- }
- ],
- "timestamp_created": "2024-01-12 18:30:40.288388+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/235561",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1855": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1855,
- "name": "Unbalanced peptidergic inhibition in superficial cortex underlies seizure activity (Hall et al 2015)",
- "repository_type": "github",
- "summary": "\" ...Loss of tonic neuromodulatory excitation, mediated by nicotinic acetylcholine or serotonin (5HT3A) receptors, of 5HT3-immunopositive interneurons caused an increase in amplitude and slowing of the delta rhythm until each period became the \"wave\" component of the spike and wave discharge. As with the normal delta rhythm, the wave of a spike and wave discharge originated in cortical layer 5. In contrast, the \"spike\" component of the spike and wave discharge originated from a relative failure of fast inhibition in layers 2/3-switching pyramidal cell action potential outputs from single, sparse spiking during delta rhythms to brief, intense burst spiking, phase-locked to the field spike. The mechanisms underlying this loss of superficial layer fast inhibition, and a concomitant increase in slow inhibition, appeared to be precipitated by a loss of neuropeptide Y (NPY)-mediated local circuit inhibition and a subsequent increase in vasoactive intestinal peptide (VIP)-mediated disinhibition. Blockade of NPY Y1 receptors was sufficient to generate spike and wave discharges, whereas blockade of VIP receptors almost completely abolished this form of epileptiform activity. These data suggest that aberrant, activity-dependent neuropeptide corelease can have catastrophic effects on neocortical dynamics.\"",
- "tags": [
- {
- "id": 469,
- "tag": "Epilepsy"
- },
- {
- "id": 710,
- "tag": "FORTRAN"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 730,
- "tag": "I A, slow"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 589,
- "tag": "I L high threshold"
- },
- {
- "id": 580,
- "tag": "I M"
- },
- {
- "id": 739,
- "tag": "I Na,p"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 575,
- "tag": "I T low threshold"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2484,
- "tag": "ModelDB:235768"
- }
- ],
- "timestamp_created": "2024-01-12 18:30:41.157317+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/235768",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1856": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1856,
- "name": "A model of slow motor unit (Kim, 2017)",
- "repository_type": "github",
- "summary": "Cav1.3 channels in motoneuron dendrites are actively involved during normal motor activities. To investigate the effects of the activation of motoneuron Cav1.3 channels on force production, a model motor unit was built based on best-available data. The simulation results suggest that force potentiation induced by Cav1.3 channel activation is strongly modulated not only by firing history of the motoneuron but also by length variation of the muscle as well as neuromodulation inputs from the brainstem.",
- "tags": [
- {
- "id": 579,
- "tag": "Active Dendrites"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 1433,
- "tag": "I_AHP"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2485,
- "tag": "ModelDB:235769"
- },
- {
- "id": 577,
- "tag": "NEURON"
- }
- ],
- "timestamp_created": "2024-01-12 18:30:42.232732+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/235769",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1857": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1857,
- "name": "The role of glutamate in neuronal ion homeostasis: spreading depolarization (Hubel et al 2017)",
- "repository_type": "github",
- "summary": "This model includes ion concentration dynamics (sodium, potassium, chloride) inside and outside the neuron, the exchange of ions with glia and blood vessels, volume dynamics of neuron, glia, and extracellular space, glutamate homeostasis involving release by neuron and uptake by both neuron and glia. Spreading depolarization is used as a case study.",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 75,
- "tag": "Homeostasis"
- },
- {
- "id": 1531,
- "tag": "I Cl, leak"
- },
- {
- "id": 591,
- "tag": "I K,leak"
- },
- {
- "id": 1532,
- "tag": "I Na, leak"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2486,
- "tag": "ModelDB:235774"
- },
- {
- "id": 740,
- "tag": "Na/K pump"
- },
- {
- "id": 759,
- "tag": "XPPAUT"
- }
- ],
- "timestamp_created": "2024-01-12 18:30:42.780600+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/235774",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1858": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1858,
- "name": "Cortical oscillations and the basal ganglia (Fountas & Shanahan 2017)",
- "repository_type": "github",
- "summary": "\"Although brain oscillations involving the basal ganglia (BG) have been\r\nthe target of extensive research, the main focus lies\r\ndisproportionally on oscillations generated within the BG circuit\r\nrather than other sources, such as cortical areas. We remedy this here\r\nby investigating the influence of various cortical frequency bands on\r\nthe intrinsic effective connectivity of the BG, as well as the role of\r\nthe latter in regulating cortical behaviour. To do this, we construct\r\na detailed neural model of the complete BG circuit based on fine-tuned\r\nspiking neurons, with both electrical and chemical synapses as well as\r\nshort-term plasticity between structures. As a measure of effective\r\nconnectivity, we estimate information transfer between nuclei by means\r\nof transfer entropy. Our model successfully reproduces firing and\r\noscillatory behaviour found in both the healthy and Parkinsonian\r\nBG. We found that, indeed, effective connectivity changes dramatically\r\nfor different cortical frequency bands and phase offsets, which are\r\nable to modulate (or even block) information flow in the three major\r\nBG pathways. ...\"",
- "tags": [
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 645,
- "tag": "Brian"
- },
- {
- "id": 1478,
- "tag": "Information transfer"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2487,
- "tag": "ModelDB:236306"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 801,
- "tag": "Parkinson's"
- },
- {
- "id": 787,
- "tag": "Pathophysiology"
- },
- {
- "id": 724,
- "tag": "Short-term Synaptic Plasticity"
- },
- {
- "id": 725,
- "tag": "Synaptic Plasticity"
- }
- ],
- "timestamp_created": "2024-01-12 18:30:43.287930+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/236306",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1859": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1859,
- "name": "Electrotonic transform and EPSCs for WT and Q175+/- spiny projection neurons (Goodliffe et al 2018)",
- "repository_type": "github",
- "summary": "This model achieves electrotonic transform and computes mean inward and outward attenuation from 0 to 500 Hz input; and randomly activates synapses along dendrites to simulate AMPAR mediated EPSCs.\r\nFor electrotonic analysis, in Elec folder, the entry file is MSNelec_transform.hoc. \r\nFor EPSC simulation, in Syn folder, the entry file is randomepsc.hoc. Run read_EPSCsims_mdb_alone.m next with the simulated parameter values specified to compute the mean EPSC.",
- "tags": [
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 786,
- "tag": "Electrotonus"
- },
- {
- "id": 1410,
- "tag": "Huntington's"
- },
- {
- "id": 2122,
- "tag": "Membrane Properties"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2488,
- "tag": "ModelDB:236310"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 1584,
- "tag": "Synaptic-input statistic"
- }
- ],
- "timestamp_created": "2024-01-12 18:30:43.845625+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/236310",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1860": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1860,
- "name": "2 Distinct Classes of L2 and L3 Pyramidal Neurons in Human Temporal Cortex (Deitcher et al 2017)",
- "repository_type": "github",
- "summary": "\"There have been few quantitative characterizations of the\r\nmorphological, biophysical, and cable properties of neurons in the\r\nhuman neocortex. We employed feature-based statistical methods on a\r\nrare data set of 60 3D reconstructed pyramidal neurons from L2 and L3\r\nin the human temporal cortex (HL2/L3 PCs) removed after brain\r\nsurgery. Of these cells, 25 neurons were also characterized\r\nphysiologically. Thirty-two morphological features were analyzed\r\n(e.g., dendritic surface area, 36 333 \u00b1 18 157 \u00b5m2; number of basal\r\ntrees, 5.55 \u00b1 1.47; dendritic diameter, 0.76 \u00b1 0.28 \u00b5m).\r\n\r\n\r\n...\r\nA novel descriptor for apical dendritic\r\ntopology yielded 2 distinct classes, termed hereby as \u201cslim-tufted\u201d\r\nand \u201cprofuse-tufted\u201d HL2/L3 PCs; the latter class tends to fire at\r\nhigher rates. Thus, our morpho-electrotonic analysis shows 2 distinct\r\nclasses of HL2/L3 PCs.\"",
- "tags": [
- {
- "id": 786,
- "tag": "Electrotonus"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2489,
- "tag": "ModelDB:236429"
- },
- {
- "id": 577,
- "tag": "NEURON"
- }
- ],
- "timestamp_created": "2024-01-12 18:30:44.651219+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/236429",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1861": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 1861,
- "name": "Differential interactions between Notch and ID factors control neurogenesis (Boareto et al 2017)",
- "repository_type": "github",
- "summary": "\"During embryonic and adult neurogenesis, neural stem cells (NSCs)\r\ngenerate the correct number and types of neurons in a temporospatial\r\nfashion. Control of NSC activity and fate is crucial for brain\r\nformation and homeostasis. Neurogenesis in the embryonic and adult\r\nbrain differ considerably, but Notch signaling and inhibitor of\r\nDNA-binding (ID) factors are pivotal in both. Notch and ID factors\r\nregulate NSC maintenance; however, it has been difficult to evaluate\r\nhow these pathways potentially interact. Here, we combined\r\nmathematical modeling with analysis of single-cell transcriptomic data\r\nto elucidate unforeseen interactions between the Notch and ID factor\r\npathways. ...\"\r\n",
- "tags": [
- {
- "id": 793,
- "tag": "Development"
- },
- {
- "id": 75,
- "tag": "Homeostasis"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2490,
- "tag": "ModelDB:236439"
- },
- {
- "id": 1693,
- "tag": "Neurogenesis"
- },
- {
- "id": 853,
- "tag": "Python (web link to model)"
- },
- {
- "id": 751,
- "tag": "Signaling pathways"
- }
- ],
- "timestamp_created": "2024-01-12 18:30:45.133252+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/236439",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1862": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 1862,
- "name": "PyRhO: A multiscale optogenetics simulation platform (Evans et al 2016)",
- "repository_type": "github",
- "summary": "\"... we present an integrated suite of open-source, multi-scale\r\ncomputational tools called PyRhO. The purpose of developing PyRhO is\r\nthree-fold: (i) to characterize new (and existing) opsins by\r\nautomatically fitting a minimal set of experimental data to three-,\r\nfour-, or six-state kinetic models, (ii) to simulate these models at\r\nthe channel, neuron and network levels, and (iii) provide functional\r\ninsights through model selection and virtual experiments in\r\nsilico. The module is written in Python with an additional\r\nIPython/Jupyter notebook based GUI, allowing models to be fit,\r\nsimulations to be run and results to be shared through simply\r\ninteracting with a webpage. The seamless integration of model fitting\r\nalgorithms with simulation environments (including NEURON and Brian2)\r\nfor these virtual opsins will enable neuroscientists to gain a\r\ncomprehensive understanding of their behavior and rapidly identify the\r\nmost suitable variant for application in a particular biological\r\nsystem. ...\"",
- "tags": [
- {
- "id": 2491,
- "tag": "Brian 2 (web link to model)"
- },
- {
- "id": 567,
- "tag": "Ion Channel Kinetics"
- },
- {
- "id": 756,
- "tag": "Methods"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2492,
- "tag": "ModelDB:236446"
- },
- {
- "id": 743,
- "tag": "NEURON (web link to model)"
- },
- {
- "id": 568,
- "tag": "Parameter Fitting"
- },
- {
- "id": 853,
- "tag": "Python (web link to model)"
- }
- ],
- "timestamp_created": "2024-01-12 18:30:45.630426+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/236446",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1863": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 1863,
- "name": "NeuroManager: a workflow analysis based simulation management engine (Stockton & Santamaria 2015)",
- "repository_type": "github",
- "summary": "\"We developed NeuroManager, an object-oriented simulation management\r\nsoftware engine for computational neuroscience. NeuroManager automates\r\nthe workflow of simulation job submissions when using heterogeneous\r\ncomputational resources, simulators, and simulation tasks. The\r\nobject-oriented approach (1) provides flexibility to adapt to a\r\nvariety of neuroscience simulators, (2) simplifies the use of\r\nheterogeneous computational resources, from desktops to super computer\r\nclusters, and (3) improves tracking of simulator/simulation\r\nevolution. We implemented NeuroManager in MATLAB, a widely used\r\nengineering and scientific language, for its signal and image\r\nprocessing tools, prevalence in electrophysiology analysis, and\r\nincreasing use in college Biology education. To design and develop\r\nNeuroManager we analyzed the workflow of simulation submission for a\r\nvariety of simulators, operating systems, and computational resources,\r\nincluding the handling of input parameters, data, models, results, and\r\nanalyses. ...\"\r\n",
- "tags": [
- {
- "id": 767,
- "tag": "MATLAB (web link to model)"
- },
- {
- "id": 756,
- "tag": "Methods"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2493,
- "tag": "ModelDB:237160"
- },
- {
- "id": 743,
- "tag": "NEURON (web link to model)"
- },
- {
- "id": 848,
- "tag": "NeuroML (web link to model)"
- }
- ],
- "timestamp_created": "2024-01-12 18:30:46.145711+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/237160",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1864": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 1864,
- "name": "Effects of Guanfacine and Phenylephrine on a model of working memory (Duggins et al 2017)",
- "repository_type": "github",
- "summary": "\"We use a spiking neural network model of working memory (WM) capable of performing the spatial delayed response task (DRT) to investigate two drugs that affect WM: guanfacine (GFC) and phenylephrine (PHE). In this model, the loss of information over time results from changes in the spiking neural activity through recurrent connections. We reproduce the standard forgetting curve and then show that this curve changes in the presence of GFC and PHE, whose application is simulated by manipulating functional, neural, and biophysical properties of the model. ... We compare our model to both electrophysiological data from neurons in monkey dorsolateral prefrontal cortex and to behavioral evidence from monkeys performing the DRT.\"",
- "tags": [
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2494,
- "tag": "ModelDB:237323"
- },
- {
- "id": 853,
- "tag": "Python (web link to model)"
- },
- {
- "id": 794,
- "tag": "Working memory"
- }
- ],
- "timestamp_created": "2024-01-12 18:30:46.646770+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/237323",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1865": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 1865,
- "name": "Active dendritic integration in robust and precise grid cell firing (Schmidt-Hieber et al 2017)",
- "repository_type": "github",
- "summary": "\"... Whether active dendrites contribute to the generation of the\r\ndual temporal and rate codes characteristic of grid cell output is\r\nunknown. We show that dendrites of medial entorhinal cortex neurons\r\nare highly excitable and exhibit a supralinear input\u2013output function\r\nin vitro, while in vivo recordings reveal membrane potential\r\nsignatures consistent with recruitment of active dendritic\r\nconductances. By incorporating these nonlinear dynamics into grid cell\r\nmodels, we show that they can sharpen the precision of the temporal\r\ncode and enhance the robustness of the rate code, thereby supporting a\r\nstable, accurate representation of space under varying environmental\r\nconditions. Our results suggest that active dendrites may therefore\r\nconstitute a key cellular mechanism for ensuring reliable spatial\r\nnavigation.\"",
- "tags": [
- {
- "id": 579,
- "tag": "Active Dendrites"
- },
- {
- "id": 718,
- "tag": "Attractor Neural Network"
- },
- {
- "id": 2495,
- "tag": "Brian (web link to model)"
- },
- {
- "id": 776,
- "tag": "C or Cplusplus program (web link to model)"
- },
- {
- "id": 565,
- "tag": "Dendritic Action Potentials"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 1433,
- "tag": "I_AHP"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2496,
- "tag": "ModelDB:237326"
- },
- {
- "id": 743,
- "tag": "NEURON (web link to model)"
- },
- {
- "id": 568,
- "tag": "Parameter Fitting"
- },
- {
- "id": 800,
- "tag": "Spatial Navigation"
- },
- {
- "id": 744,
- "tag": "Synaptic noise"
- }
- ],
- "timestamp_created": "2024-01-12 18:30:47.241242+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/237326",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1866": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 1866,
- "name": "Synaptic damage underlies EEG abnormalities in postanoxic encephalopathy (Ruijter et al 2017)",
- "repository_type": "github",
- "summary": "\"... In postanoxic coma, EEG patterns indicate the severity of encephalopathy and typically evolve in time. We aim to improve the understanding of pathophysiological mechanisms underlying these EEG abnormalities.\r\n...\r\nWe used a mean field model comprising excitatory and inhibitory neurons, local synaptic connections, and input from thalamic afferents. Anoxic damage is modeled as aggravated short-term synaptic depression, with gradual recovery over many hours. Additionally, excitatory neurotransmission is potentiated, scaling with the severity of anoxic encephalopathy. Simulations were compared with continuous EEG recordings of 155 comatose patients after cardiac arrest. ...\"",
- "tags": [
- {
- "id": 722,
- "tag": "Depression"
- },
- {
- "id": 749,
- "tag": "Long-term Synaptic Plasticity"
- },
- {
- "id": 767,
- "tag": "MATLAB (web link to model)"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2497,
- "tag": "ModelDB:237348"
- },
- {
- "id": 724,
- "tag": "Short-term Synaptic Plasticity"
- },
- {
- "id": 725,
- "tag": "Synaptic Plasticity"
- }
- ],
- "timestamp_created": "2024-01-12 18:30:47.750681+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/237348",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1867": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1867,
- "name": "A systems model of Parkinson\u2019s disease using biochemical systems theory (Sasidharakurup et al. 2017)",
- "repository_type": "github",
- "summary": "Major pathways involving in Parkinson's disease (PD) such as alphasynuclein aggregation, dopamine \r\nsynthesis, lewy body formation, tau phosphorylation, parkin, and apoptosis were modeled \r\nusing stochastic differential equations. Pathways were modeled and simulated using the \r\nbiochemical pathway visualization program CellDesigner, a modeling tool for gene-regulatory \r\nand biochemical networks that support graphical notation and listing of symbols. The model allows \r\na qualitative analysis of PD and a key signalling pathways for evaluating PD treatment conditions \r\nrelating pathophysiology to molecular concentration changes recorded in experiments.",
- "tags": [
- {
- "id": 2454,
- "tag": "CellDesigner"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2498,
- "tag": "ModelDB:237466"
- },
- {
- "id": 801,
- "tag": "Parkinson's"
- },
- {
- "id": 787,
- "tag": "Pathophysiology"
- },
- {
- "id": 751,
- "tag": "Signaling pathways"
- }
- ],
- "timestamp_created": "2024-01-12 18:30:48.240936+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/237466",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1868": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1868,
- "name": "SCZ-associated variant effects on L5 pyr cell NN activity and delta osc. (Maki-Marttunen et al 2018)",
- "repository_type": "github",
- "summary": "\" \u2026 Here, using computational modeling,\r\nwe show that a common biomarker of schizophrenia, namely, an increase in delta-oscillation power, may be a direct\r\nconsequence of altered expression or kinetics of voltage-gated ion channels or calcium transporters. Our model of a circuit\r\nof layer V pyramidal cells highlights multiple types of schizophrenia-related variants that contribute to altered dynamics in\r\nthe delta frequency band. Moreover, our model predicts that the same membrane mechanisms that increase the layer V\r\npyramidal cell network gain and response to delta-frequency oscillations may also cause a decit in a single-cell correlate of\r\nthe prepulse inhibition, which is a behavioral biomarker highly associated with schizophrenia.\"",
- "tags": [
- {
- "id": 1684,
- "tag": "Ca pump"
- },
- {
- "id": 730,
- "tag": "I A, slow"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 591,
- "tag": "I K,leak"
- },
- {
- "id": 589,
- "tag": "I L high threshold"
- },
- {
- "id": 580,
- "tag": "I M"
- },
- {
- "id": 739,
- "tag": "I Na,p"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 575,
- "tag": "I T low threshold"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 2417,
- "tag": "LFPy"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2499,
- "tag": "ModelDB:237469"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 620,
- "tag": "Python"
- },
- {
- "id": 845,
- "tag": "Schizophrenia"
- }
- ],
- "timestamp_created": "2024-01-12 18:30:48.782344+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/237469",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1869": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 1869,
- "name": "Heterosynaptic Spike-Timing-Dependent Plasticity (Hiratani & Fukai 2017)",
- "repository_type": "github",
- "summary": "\"The balance between excitatory and inhibitory inputs is a key feature of cortical dynamics. Such a balance is arguably preserved in dendritic branches, yet its underlying mechanism and functional roles remain unknown. In this study, we developed computational models of heterosynaptic spike-timing-dependent plasticity (STDP) to show that the excitatory/inhibitory balance in dendritic branches is robustly achieved through heterosynaptic interactions between excitatory and inhibitory synapses. The model reproduces key features of experimental heterosynaptic STDP well, and provides analytical insights. ...\"",
- "tags": [
- {
- "id": 579,
- "tag": "Active Dendrites"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2500,
- "tag": "ModelDB:237555"
- },
- {
- "id": 853,
- "tag": "Python (web link to model)"
- },
- {
- "id": 802,
- "tag": "STDP"
- },
- {
- "id": 725,
- "tag": "Synaptic Plasticity"
- }
- ],
- "timestamp_created": "2024-01-12 18:30:49.337173+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/237555",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1870": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1870,
- "name": "Stochastic layer V pyramidal neuron: interpulse interval coding and noise (Singh & Levy 2017)",
- "repository_type": "github",
- "summary": "Layer V pyramidal neuron with stochastic Na channels. Supports evidence for interpulse interval coding and has very detailed AIS with Nav1.2 and Nav1.6 channels.",
- "tags": [
- {
- "id": 727,
- "tag": "Action Potential Initiation"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2501,
- "tag": "ModelDB:237594"
- },
- {
- "id": 577,
- "tag": "NEURON"
- }
- ],
- "timestamp_created": "2024-01-12 18:30:49.805857+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/237594",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1871": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1871,
- "name": "Fast Spiking Basket cells (Tzilivaki et al 2019)",
- "repository_type": "github",
- "summary": "\"Interneurons are critical for the proper functioning of neural circuits. While often morphologically complex, dendritic integration and its role in neuronal output have been ignored for decades, treating interneurons as linear point neurons. Exciting new findings suggest that interneuron dendrites support complex, nonlinear computations: sublinear integration of EPSPs in the cerebellum, coupled to supralinear calcium accumulations and supralinear voltage integration in the hippocampus. These findings challenge the point neuron dogma and call for a new theory of interneuron arithmetic. Using detailed, biophysically constrained models, we predict that dendrites of FS basket cells in both hippocampus and mPFC come in two flavors: supralinear, supporting local sodium spikes within large-volume branches and sublinear, in small-volume branches. Synaptic activation of varying sets of these dendrites leads to somatic firing variability that cannot be explained by the point neuron reduction. Instead, a 2-stage Artificial Neural Network (ANN), with both sub- and supralinear hidden nodes, captures most of the variance. We propose that FS basket cells have substantially expanded computational capabilities sub-served by their non-linear dendrites and act as a 2-layer ANN.\"",
- "tags": [
- {
- "id": 579,
- "tag": "Active Dendrites"
- },
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2502,
- "tag": "ModelDB:237595"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 620,
- "tag": "Python"
- }
- ],
- "timestamp_created": "2024-01-12 18:30:50.291559+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/237595",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1872": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1872,
- "name": "A model of neurovascular coupling and the BOLD response (Mathias et al 2017, Kenny et al 2018)",
- "repository_type": "github",
- "summary": "Here a lumped parameter numerical model of a neurovascular unit is presented, representing an intercellular communication system based on ion exchange through pumps and channels between neurons, astrocytes, smooth muscle cells, endothelial cells, and the spaces between these cells: the synaptic cleft between the neuron and astrocyte, the perivascular space between the astrocyte and SMC, and the extracellular space surrounding the cells. \r\nThe model contains various cellular and chemical pathways such as potassium, astrocytic calcium, and nitric oxide. \r\nThe model is able to simulate neurovascular coupling, the process characterised by an increase in neuronal activity followed by a rapid dilation of local blood vessels and hence increased blood supply providing oxygen and glucose to cells in need. \r\nThe model also incorporates the BOLD response.",
- "tags": [
- {
- "id": 727,
- "tag": "Action Potential Initiation"
- },
- {
- "id": 572,
- "tag": "Calcium dynamics"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2503,
- "tag": "ModelDB:237604"
- },
- {
- "id": 1808,
- "tag": "Potassium buffering"
- }
- ],
- "timestamp_created": "2024-01-12 18:30:50.956369+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/237604",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1873": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1873,
- "name": "Striatal D1R medium spiny neuron, including a subcellular DA cascade (Lindroos et al 2018)",
- "repository_type": "github",
- "summary": "We are investigating how dopaminergic modulation of single channels can be combined to make the D1R possitive MSN more excitable. We also connect multiple channels to substrates of a dopamine induced subcellular cascade to highlight that the classical pathway is too slow to explain DA induced kinetics in the subsecond range (Howe and Dombeck, 2016. doi: 10.1038/nature18942)",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 2211,
- "tag": "Electrical-chemical"
- },
- {
- "id": 781,
- "tag": "G-protein coupled"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 730,
- "tag": "I A, slow"
- },
- {
- "id": 731,
- "tag": "I CAN"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 591,
- "tag": "I K,leak"
- },
- {
- "id": 842,
- "tag": "I Krp"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 844,
- "tag": "I R"
- },
- {
- "id": 575,
- "tag": "I T low threshold"
- },
- {
- "id": 1931,
- "tag": "Kir"
- },
- {
- "id": 2122,
- "tag": "Membrane Properties"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2504,
- "tag": "ModelDB:237653"
- },
- {
- "id": 866,
- "tag": "Multiscale"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 1744,
- "tag": "Neuromodulation"
- },
- {
- "id": 620,
- "tag": "Python"
- },
- {
- "id": 744,
- "tag": "Synaptic noise"
- }
- ],
- "timestamp_created": "2024-01-12 18:30:51.504677+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/237653",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1874": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 1874,
- "name": "State-dependent rhythmogenesis in a half-center locomotor CPG (Ausborn et al 2017)",
- "repository_type": "github",
- "summary": "\"The spinal locomotor central pattern generator (CPG) generates\r\nrhythmic activity with alternating flexion and extension phases. This\r\nrhythmic pattern is likely to result from inhibitory interactions\r\nbetween neural populations representing flexor and extensor\r\nhalf-centers. However, it is unclear whether the flexor-extensor CPG\r\nhas a quasi-symmetric organization with both half-centers critically\r\ninvolved in rhythm generation, features an asymmetric organization\r\nwith flexor-driven rhythmogenesis, or comprises a pair of\r\nintrinsically rhythmic half-centers. There are experimental data that\r\nsupport each of the above concepts but appear to be inconsistent with\r\nthe others. In this theoretical/modeling study, we present and analyze\r\na CPG model architecture that can operate in different regimes\r\nconsistent with the above three concepts depending on conditions,\r\nwhich are defined by external excitatory drives to CPG\r\nhalf-centers. We show that control of frequency and phase durations\r\nwithin each regime depends on network dynamics, defined by the\r\nregime-dependent expression of the half-centers' intrinsic rhythmic\r\ncapabilities and the operating phase transition mechanisms (escape\r\nvs. release). Our study suggests state dependency in locomotor CPG\r\noperation and proposes explanations for seemingly contradictory\r\nexperimental data.\"",
- "tags": [
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 739,
- "tag": "I Na,p"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2505,
- "tag": "ModelDB:237685"
- },
- {
- "id": 2506,
- "tag": "NSM (web link to model)"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 720,
- "tag": "Temporal Pattern Generation"
- }
- ],
- "timestamp_created": "2024-01-12 18:30:52.035668+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/237685",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "modeling"
- ],
- "default_context": "master",
- "id": 1875,
- "name": "Perceptual judgments via sensory-motor interaction assisted by cortical GABA (Hoshino et al 2018)",
- "repository_type": "github",
- "summary": "\"Recurrent input to sensory cortex, via long-range reciprocal projections between motor and sensory cortices, is essential\r\nfor accurate perceptual judgments. GABA levels in sensory cortices correlate with perceptual performance. We simulated\r\na neuron-astrocyte network model to investigate how top-down, feedback signaling from a motor network (Nmot) to a\r\nsensory network (Nsen) affects perceptual judgments in association with ambient (extracellular) GABA levels. In the Nsen,\r\nastrocytic transporters modulated ambient GABA levels around pyramidal cells. A simple perceptual task was implemented:\r\ndetection of a feature stimulus presented to the Nsen. ...\"",
- "tags": [
- {
- "id": 755,
- "tag": "C or Cplusplus program"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2507,
- "tag": "ModelDB:237727"
- }
- ],
- "timestamp_created": "2024-01-12 18:30:52.494876+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/237727",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "1876": {
- "auto_sync": true,
- "content_types": "modeling",
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- "modeling"
- ],
- "default_context": "master",
- "id": 1876,
- "name": "Single excitatory axons form clustered synapses onto CA1 pyramidal cell dendrites (Bloss et al 2018)",
- "repository_type": "github",
- "summary": "\" ... Here we show that single presynaptic axons form multiple, spatially clustered inputs onto the distal, but not proximal, dendrites of CA1 pyramidal neurons. These compound connections exhibit ultrastructural features indicative of strong synapses and occur much more commonly in entorhinal than in thalamic afferents. Computational simulations revealed that compound connections depolarize dendrites in a biophysically efficient manner, owing to their inherent spatiotemporal clustering. ...\"",
- "tags": [
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2508,
- "tag": "ModelDB:237728"
- },
- {
- "id": 577,
- "tag": "NEURON"
- }
- ],
- "timestamp_created": "2024-01-12 18:30:53.020090+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/237728",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1877": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1877,
- "name": "Model of the Xenopus tadpole swimming spinal network (Roberts et al. 2014)",
- "repository_type": "github",
- "summary": "This is a NEURON-python and MATLAB simulation code for generating anatomical or probabilistic connectivity and simulating the neuronal dynamics of the neuronal network controlling swimming in Xenopus tadpoles. For more details about this model, see Ferrario et al, 2018, eLife and Roberts et al, 2014, J of Neurosci",
- "tags": [
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 855,
- "tag": "Connectivity matrix"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 783,
- "tag": "I_Ks"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2509,
- "tag": "ModelDB:238332"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- }
- ],
- "timestamp_created": "2024-01-12 18:33:15.234201+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/238332",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1878": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1878,
- "name": "Synchronized oscillations of clock gene expression in the choroid plexus (Myung et al 2018)",
- "repository_type": "github",
- "summary": "Our model simulates synchronized rhythms in the clock gene expression found in the choroid plexus. These synchronized oscillations, primarily mediated by gap junctions, showed interesting relationships between their amplitude, oscillation frequency, and coupling strength (gap junction density) in our experimental data. The model is based on coupled Poincar\u00e9 oscillators and replicates this phenomenon via a non-zero \"twist\" in each cell.",
- "tags": [
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 1586,
- "tag": "Circadian Rhythms"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 1609,
- "tag": "Mathematica"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2510,
- "tag": "ModelDB:238338"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 620,
- "tag": "Python"
- },
- {
- "id": 586,
- "tag": "Synchronization"
- },
- {
- "id": 720,
- "tag": "Temporal Pattern Generation"
- }
- ],
- "timestamp_created": "2024-01-12 18:33:16.178793+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/238338",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1879": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 1879,
- "name": "Comprehensive models of human cortical pyramidal neurons (Eyal et al 2018)",
- "repository_type": "github",
- "summary": "\"We present detailed models of pyramidal cells from human neocortex, including models on their excitatory synapses, dendritic spines, dendritic NMDA- and somatic/axonal Na+ spikes that provided new insights into signal processing and computational capabilities of these principal cells. Six human layer 2 and layer 3 pyramidal cells (HL2/L3 PCs) were modeled, integrating detailed anatomical and physiological data from both fresh and postmortem tissues from human temporal cortex. The models predicted particularly large AMPA- and NMDA- conductances per synaptic contact (0.88 nS and 1.31nS, respectively) and a steep dependence of the NMDA-conductance on voltage...\"",
- "tags": [
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2511,
- "tag": "ModelDB:238347"
- },
- {
- "id": 743,
- "tag": "NEURON (web link to model)"
- },
- {
- "id": 853,
- "tag": "Python (web link to model)"
- }
- ],
- "timestamp_created": "2024-01-12 18:33:16.856284+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/238347",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1880": {
- "auto_sync": true,
- "content_types": "modeling",
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- "modeling"
- ],
- "default_context": "main",
- "id": 1880,
- "name": "Generating neuron geometries for detailed 3D simulations using AnaMorph (Morschel et al 2017)",
- "repository_type": "github",
- "summary": "\"Generating realistic and complex computational domains for numerical simulations is often a challenging task. In neuroscientific research, more and more one-dimensional morphology data is becoming publicly available through databases. This data, however, only contains point and diameter information not suitable for detailed three-dimensional simulations. In this paper, we present a novel framework, AnaMorph, that automatically generates water-tight surface meshes from one-dimensional point-diameter files. These surface triangulations can be used to simulate the electrical and biochemical behavior of the underlying cell. ...\"",
- "tags": [
- {
- "id": 776,
- "tag": "C or Cplusplus program (web link to model)"
- },
- {
- "id": 756,
- "tag": "Methods"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2512,
- "tag": "ModelDB:238449"
- }
- ],
- "timestamp_created": "2024-01-12 18:33:17.489402+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/238449",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1881": {
- "auto_sync": true,
- "content_types": "modeling",
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- "modeling"
- ],
- "default_context": "master",
- "id": 1881,
- "name": "Using NEURON for reaction-diffusion modeling of extracellular dynamics (Newton et al 2018)",
- "repository_type": "github",
- "summary": "Development of credible clinically-relevant brain simulations has been slowed due to a focus on electrophysiology in computational neuroscience, neglecting the multiscale whole-tissue modeling approach used for simulation in most other organ systems. We have now begun to extend the NEURON simulation platform in this direction by adding extracellular modeling. NEURON's extracellular reaction-diffusion is supported by an intuitive Python-based where/who/what command sequence, derived from that used for intracellular reaction diffusion, to support coarse-grained macroscopic extracellular models. This simulation specification separates the expression of the conceptual model and parameters from the underlying numerical methods. In the volume-averaging approach used, the macroscopic model of tissue is characterized by free volume fraction\u2014the proportion of space in which species are able to diffuse, and tortuosity\u2014the average increase in path length due to obstacles. These tissue characteristics can be defined within particular spatial regions, enabling the modeler to account for regional differences, due either to intrinsic organization, particularly gray vs. white matter, or to pathology such as edema. We illustrate simulation development using spreading depression, a pathological phenomenon thought to play roles in migraine, epilepsy and stroke.",
- "tags": [
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2513,
- "tag": "ModelDB:238892"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 1919,
- "tag": "Reaction-diffusion"
- }
- ],
- "timestamp_created": "2024-01-12 18:33:18.092165+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/238892",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1882": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1882,
- "name": "Neuromuscular network model of gut motility (Barth et al 2017)",
- "repository_type": "github",
- "summary": "Here we develop an integrated neuromechanical model of the ENS and assess neurostimulation strategies for enhancing gut motility. The model includes a network of enteric neurons, smooth muscle fibers, and interstitial cells of Cajal, which regulate propulsion of a virtual pellet in a model of gut motility.",
- "tags": [
- {
- "id": 2255,
- "tag": "Brian 2"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2514,
- "tag": "ModelDB:238911"
- },
- {
- "id": 620,
- "tag": "Python"
- }
- ],
- "timestamp_created": "2024-01-12 18:33:18.814744+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/238911",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "1883": {
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- "default_context": "master",
- "id": 1883,
- "name": "A state-space model to quantify common input to motor neurons (Feeney et al 2017)",
- "repository_type": "github",
- "summary": "\"... We introduce a space-state model in which the discharge activity\r\nof motor neurons is modeled as inhomogeneous Poisson processes\r\nand propose a method to quantify an abstract latent trajectory\r\nthat represents the common input received by motor neurons. The\r\napproach also approximates the variation in synaptic noise in the\r\ncommon input signal. The model is validated with four data sets:\r\na simulation of 120 motor units, a pair of integrate-and-fire\r\nneurons with a Renshaw cell providing inhibitory feedback, the\r\ndischarge activity of 10 integrate-and-fire neurons, and the\r\ndischarge times of concurrently active motor units during an\r\nisometric voluntary contraction. The simulations revealed that a\r\nlatent state-space model is able to quantify the trajectory and\r\nvariability of the common input signal across all four\r\nconditions. When compared with the cumulative spike train method\r\nof characterizing common input, the state-space approach was more\r\nsensitive to the details of the common input current and was less\r\ninfluenced by the duration of the signal. The state-space\r\napproach appears to be capable of detecting rather modest changes\r\nin common input signals across conditions.\"\r\n",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2515,
- "tag": "ModelDB:238912"
- },
- {
- "id": 744,
- "tag": "Synaptic noise"
- }
- ],
- "timestamp_created": "2024-01-12 18:33:19.377816+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/238912",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1884": {
- "auto_sync": true,
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- "modeling"
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- "default_context": "master",
- "id": 1884,
- "name": "Morphological determinants of dendritic arborization neurons in Drosophila larva (Nanda et al 2018)",
- "repository_type": "github",
- "summary": "\"Pairing in vivo imaging and computational modeling of dendritic\r\narborization (da) neurons from the fruit fly larva provides a unique\r\nwindow into neuronal growth and underlying molecular processes. We\r\nimage, reconstruct, and analyze the morphology of wild-type,\r\nRNAi-silenced, and mutant da neurons. We then use local and global\r\nrule-based stochastic simulations to generate artificial arbors, and\r\nidentify the parameters that statistically best approximate the real\r\ndata. We observe structural homeostasis in all da classes, where an\r\nincrease in size of one dendritic stem is compensated by a reduction\r\nin the other stems of the same neuron. Local rule models show that\r\nbifurcation probability is determined by branch order, while branch\r\nlength depends on path distance from the soma. Global rule simulations\r\nsuggest that most complex morphologies tend to be constrained by\r\nresource optimization, while simpler neuron classes privilege path\r\ndistance conservation. Genetic manipulations affect both the local\r\nand global optimal parameters, demonstrating functional\r\nperturbations in growth mechanisms.\"\r\n",
- "tags": [
- {
- "id": 804,
- "tag": "Bifurcation"
- },
- {
- "id": 75,
- "tag": "Homeostasis"
- },
- {
- "id": 570,
- "tag": "Influence of Dendritic Geometry"
- },
- {
- "id": 778,
- "tag": "Java"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2516,
- "tag": "ModelDB:238916"
- }
- ],
- "timestamp_created": "2024-01-12 18:33:20.038451+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/238916",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1885": {
- "auto_sync": true,
- "content_types": "modeling",
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- "modeling"
- ],
- "default_context": "main",
- "id": 1885,
- "name": "LFP signature of monosynaptic thalamocortical connection (Hagen et al 2017)",
- "repository_type": "github",
- "summary": "\"A resurgence has taken place in recent years in the use of the\r\nextracellularly recorded local field potential (LFP) to investigate\r\nneural network activity. To probe monosynaptic thalamic activation of\r\ncortical postsynaptic target cells, so called spike-trigger-averaged\r\nLFP (stLFP) signatures have been measured. In these experiments, the\r\ncortical LFP is measured by multielectrodes covering several cortical\r\nlamina and averaged on spontaneous spikes of thalamocortical (TC)\r\ncells. Using a well established forward-modeling scheme, we\r\ninvestigated the biophysical origin of this stLFP signature with\r\nsimultaneous synaptic activation of cortical layer-4 neurons,\r\nmimicking the effect of a single afferent spike from a single TC\r\nneuron.\r\n...\"",
- "tags": [
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 1546,
- "tag": "Evoked LFP"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2517,
- "tag": "ModelDB:238920"
- },
- {
- "id": 743,
- "tag": "NEURON (web link to model)"
- }
- ],
- "timestamp_created": "2024-01-12 18:33:20.595681+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/238920",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1886": {
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- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1886,
- "name": "Short Term Depression, Presynaptic Inhib., Neuron Diversity Roles in Antennal Lobe (Wei & Lo 2020)",
- "repository_type": "github",
- "summary": "Short Term Depression, Presynaptic Inhib., Neuron Diversity Roles in Antennal Lobe (Wei & Lo 2020)",
- "tags": [
- {
- "id": 755,
- "tag": "C or Cplusplus program"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2518,
- "tag": "ModelDB:238959"
- },
- {
- "id": 724,
- "tag": "Short-term Synaptic Plasticity"
- }
- ],
- "timestamp_created": "2024-01-12 18:33:21.085709+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/238959",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "repository_type": "github",
- "summary": "\"The detailed knowledge of C. elegans connectome for 3 decades has not contributed dramatically to our understanding of worm\u2019s behavior. One of main reasons for this situation has been the lack of data on the type of synaptic signaling between particular neurons in the worm\u2019s connectome. The aim of this study was to determine synaptic polarities for each connection in a small pre-motor circuit controlling locomotion. Even in this compact network of just 7 neurons the space of all possible patterns of connection types (excitation vs. inhibition) is huge. To deal effectively with this combinatorial problem we devised a novel and relatively fast technique based on genetic algorithms and large-scale parallel computations, which we combined with detailed neurophysiological modeling of interneuron dynamics and compared the theory to the available behavioral data. As a result of these massive computations, we found that the optimal connectivity pattern that matches the best locomotory data is the one in which all interneuron connections are inhibitory, even those terminating on motor neurons. ...\"",
- "tags": [
- {
- "id": 729,
- "tag": "Invertebrate"
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- {
- "id": 849,
- "tag": "Java (web link to model)"
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- "timestamp_created": "2024-01-12 18:33:21.940458+00:00",
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- "uri": "https://github.com/OpenSourceBrain/238985",
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- "name": "Logarithmic distributions prove that intrinsic learning is Hebbian (Scheler 2017)",
- "repository_type": "github",
- "summary": "\"In this paper, we present data for the lognormal distributions of spike rates,\r\nsynaptic weights and intrinsic excitability (gain) for neurons in various brain\r\nareas, such as auditory or visual cortex, hippocampus, cerebellum, striatum,\r\nmidbrain nuclei. We find a remarkable consistency of heavy-tailed, specifically\r\nlognormal, distributions for rates, weights and gains in all brain areas\r\nexamined. The difference between strongly recurrent and feed-forward\r\nconnectivity (cortex vs. striatum and cerebellum), neurotransmitter (GABA\r\n(striatum) or glutamate (cortex)) or the level of activation (low in cortex, high in\r\nPurkinje cells and midbrain nuclei) turns out to be irrelevant for this feature.\r\nLogarithmic scale distribution of weights and gains appears to be a general,\r\nfunctional property in all cases analyzed. We then created a generic neural\r\nmodel to investigate adaptive learning rules that create and maintain lognormal\r\ndistributions. We conclusively demonstrate that not only weights, but also\r\nintrinsic gains, need to have strong Hebbian learning in order to produce and\r\nmaintain the experimentally attested distributions. This provides a solution to\r\nthe long-standing question about the type of plasticity exhibited by intrinsic\r\nexcitability.\"",
- "tags": [
- {
- "id": 825,
- "tag": "Learning"
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- {
- "id": 655,
- "tag": "MATLAB"
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- "id": 2520,
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- "id": 725,
- "tag": "Synaptic Plasticity"
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- "timestamp_created": "2024-01-12 18:33:22.485867+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/239003",
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- "email": "info@opensourcebrain.org",
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- "id": 1889,
- "name": "Extracellular stimulation of myelinated axon (Reilly 2016)",
- "repository_type": "github",
- "summary": "This is an implementation of an established \"electrostimulation model\" subjected to a set of stimulation protocols. Such models and protocols are used to predict the response of neural tissue to stimulation by electromagnetic fields or direct application of extracellular current in order to \"evaluate the efficacy and safety of medical devices, or to develop guidelines or standards on acceptible incidental exposure that may not be related to patient exposure for medical purposes.\"",
- "tags": [
- {
- "id": 734,
- "tag": "Extracellular Fields"
- },
- {
- "id": 576,
- "tag": "I K"
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- "id": 582,
- "tag": "I Sodium"
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- "id": 564,
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- "id": 2521,
- "tag": "ModelDB:239006"
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- "id": 577,
- "tag": "NEURON"
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- "timestamp_created": "2024-01-12 18:33:23.045180+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/239006",
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- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
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- "id": 1890,
- "name": "Locational influence of dendritic PIC on input-output properties of spinal motoneurons (Kim 2017)",
- "repository_type": "github",
- "summary": "How does the dendritic location of calcium persistent inward current (Ca-PIC) influence dendritic excitability and firing behavior across the spinal motoneuron pool? This issue was investigated developing a model motoneuron pool where model parameters were analytically determined to reflect key motoneuron type-specific properties experimentally identified. The simulation results point out the negative relationship between the distance of Ca-PIC source from the soma and cell recruitment threshold as a basis underlying the systematic variation in input-output properties of motoneurons over the motoneuron pool.",
- "tags": [
- {
- "id": 579,
- "tag": "Active Dendrites"
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- "id": 583,
- "tag": "I Calcium"
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- "id": 584,
- "tag": "I Potassium"
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- "id": 582,
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- "tag": "I_AHP"
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- "id": 564,
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- "tag": "ModelDB:239039"
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- "tag": "XPPAUT"
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- "timestamp_created": "2024-01-12 18:33:24.369359+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/239039",
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- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
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- "id": 1891,
- "name": "Analytical modelling of temperature effects on an AMPA-type synapse (Kufel & Wojcik 2018)",
- "repository_type": "github",
- "summary": "This code was used in the construction of the model developed in the paper. It is a modified version of the simulation developed by Postlethwaite et al. 2007 - for details of modifications refer to the main body of Kufel & Wojcik (2018).",
- "tags": [
- {
- "id": 826,
- "tag": "MCell"
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- "id": 756,
- "tag": "Methods"
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- "id": 564,
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- "id": 2523,
- "tag": "ModelDB:239072"
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- "id": 620,
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- "id": 1823,
- "tag": "Temperature"
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- "timestamp_created": "2024-01-12 18:33:25.275227+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/239072",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "id": 1892,
- "name": "Evolving simple models of diverse dynamics in hippocampal neuron types (Venkadesh et al 2018)",
- "repository_type": "github",
- "summary": "\" ... we present an automated pipeline based on evolutionary algorithms to quantitatively reproduce features of various classes of neuronal spike patterns using the Izhikevich model. Employing experimental data from Hippocampome.org, a comprehensive knowledgebase of neuron types in the rodent hippocampus, we demonstrate that our approach reliably fit Izhikevich models to nine distinct classes of experimentally recorded spike patterns, including\r\ndelayed spiking, spiking with adaptation, stuttering, and bursting. ...\"",
- "tags": [
- {
- "id": 566,
- "tag": "Bursting"
- },
- {
- "id": 754,
- "tag": "Delay"
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- "id": 849,
- "tag": "Java (web link to model)"
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- "id": 2524,
- "tag": "ModelDB:239103"
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- "id": 777,
- "tag": "Spike Frequency Adaptation"
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- "id": 834,
- "tag": "Stuttering"
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- ],
- "timestamp_created": "2024-01-12 18:33:26.026721+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/239103",
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- "name": "Sensory-evoked responses of L5 pyramidal tract neurons (Egger et al 2020)",
- "repository_type": "github",
- "summary": "This is the L5 pyramidal tract neuron (L5PT) model from Egger, Narayanan et al., Neuron 2020.\r\n\r\nIt allows investigating how synaptic inputs evoked by different sensory stimuli are integrated by the complex intrinsic properties of L5PTs.\r\n\r\nThe model is constrained by anatomical measurements of the subcellular synaptic input patterns to L5PT neurons, in vivo measurements of sensory-evoked responses of different populations of neurons providing these synaptic inputs, and in vitro measurements constraining the biophysical properties of the soma, dendrites and axon (note: the biophysical model is based on the work by Hay et al., Plos Comp Biol 2011).\r\n\r\nThe model files provided here allow performing simulations and analyses presented in Figures 3, 4 and 5.",
- "tags": [
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- "id": 579,
- "tag": "Active Dendrites"
- },
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
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- "id": 583,
- "tag": "I Calcium"
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- "id": 576,
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- "id": 581,
- "tag": "I K,Ca"
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- "id": 580,
- "tag": "I M"
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- "id": 739,
- "tag": "I Na,p"
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- "id": 2248,
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- "timestamp_created": "2024-01-12 18:33:26.631422+00:00",
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- "uri": "https://github.com/OpenSourceBrain/239145",
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- "id": 1894,
- "name": "A neuronal circuit simulator for non Monte Carlo analysis of neuronal noise (Kilinc & Demir 2018)",
- "repository_type": "github",
- "summary": "cirsiumNeuron is a neuronal circuit simulator that can directly and efficiently compute characterizations of stochastic behavior, i.e., noise, for multi-neuron circuits. In cirsiumNeuron, we utilize a general modeling framework for biological neuronal circuits which systematically captures the nonstationary stochastic behavior of the ion channels and the synaptic processes. In this framework, we employ fine-grained, discrete-state, continuous-time Markov Chain (MC) models of both ion channels and synaptic processes in a unified manner. Our modeling framework can automatically generate the corresponding coarse-grained, continuous-state, continuous-time Stochastic Differential Equation (SDE) models. In addition, for the stochastic characterization of neuronal variability and noise, we have implemented semi-analytical, non Monte Carlo analysis techniques that work both in time and frequency domains, which were previously developed for analog electronic circuits. In these semi-analytical noise evaluation schemes, (differential) equations that directly govern probabilistic characterizations in the form of correlation functions (time domain) or spectral densities (frequency domain) are first derived analytically, and then solved numerically. These semi-analytical noise analysis techniques correctly and accurately capture the second order statistics (mean, variance, autocorrelation, and power spectral density) of the underlying neuronal processes as compared with Monte Carlo simulations.",
- "tags": [
- {
- "id": 1531,
- "tag": "I Cl, leak"
- },
- {
- "id": 584,
- "tag": "I Potassium"
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- "id": 655,
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- "id": 748,
- "tag": "Markov-type model"
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- "id": 1576,
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- "id": 744,
- "tag": "Synaptic noise"
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- "tag": "cirsiumNeuron"
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- "timestamp_created": "2024-01-12 18:37:11.738775+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/239146",
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- "id": 1895,
- "name": "DynaSim: a MATLAB toolbox for neural modeling and simulation (Sherfey et al 2018)",
- "repository_type": "github",
- "summary": "\"DynaSim is an open-source MATLAB/GNU Octave toolbox for rapid prototyping of neural models and batch simulation management. It is designed to speed up and simplify the process of generating, sharing, and exploring network models of neurons with one or more compartments. Models can be specified by equations directly (similar to XPP or the Brian simulator) or by lists of predefined or custom model components. The higher-level specification supports arbitrarily complex population models and networks of interconnected populations. DynaSim also includes a large set of features that simplify exploring model dynamics over parameter spaces, running simulations in parallel using both multicore processors and high-performance computer clusters, and analyzing and plotting large numbers of simulated data sets in parallel. It also includes a graphical user interface (DynaSim GUI) that supports full functionality without requiring user programming. The software has been implemented in MATLAB to enable advanced neural modeling using MATLAB, given its popularity and a growing interest in modeling neural systems....\"",
- "tags": [
- {
- "id": 2528,
- "tag": "DynaSim (web link to model)"
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- "timestamp_created": "2024-01-12 18:37:12.283922+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/239161",
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- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
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- "id": 1896,
- "name": "Phase response theory in sparsely + strongly connected inhibitory NNs (Tikidji-Hamburyan et al 2019)",
- "repository_type": "github",
- "summary": "Phase response theory in sparsely + strongly connected inhibitory NNs (Tikidji-Hamburyan et al 2019)",
- "tags": [
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2530,
- "tag": "ModelDB:239177"
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- {
- "id": 577,
- "tag": "NEURON"
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- "id": 620,
- "tag": "Python"
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- "timestamp_created": "2024-01-12 18:37:12.876254+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/239177",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "content_types": "modeling",
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- ],
- "default_context": "main",
- "id": 1897,
- "name": "Brain Dynamics Toolbox (Heitmann & Breakspear 2016, 2017, 2018)",
- "repository_type": "github",
- "summary": "\"The Brain Dynamics Toolbox is open-source software for simulating dynamical systems in neuroscience. It is for researchers and students who wish to explore mathematical models of brain function using Matlab. It includes a graphical tool for simulating dynamical systems in real-time as well as command-line tools for scripting large-scale simulations.\"",
- "tags": [
- {
- "id": 2531,
- "tag": "Brain Dynamics Toolbox (web link to model)"
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- "id": 767,
- "tag": "MATLAB (web link to model)"
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- "id": 564,
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- "tag": "ModelDB:239388"
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- "timestamp_created": "2024-01-12 18:37:13.399411+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/239388",
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- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "default_context": "main",
- "id": 1898,
- "name": "Vibration-sensitive Honeybee interneurons (Ai et al 2017)",
- "repository_type": "github",
- "summary": "\"Female honeybees use the \u201cwaggle dance\u201d to communicate the location of nectar sources to their hive mates. Distance information is encoded in the duration of the waggle phase (von Frisch, 1967). During the waggle phase, the dancer produces trains of vibration pulses, which are detected by the follower bees via Johnston's organ located on the antennae. To uncover the neural mechanisms underlying the encoding of distance information in the waggle dance follower, we investigated morphology, physiology, and immunohistochemistry of interneurons arborizing in the primary auditory center of the honeybee (Apis mellifera). We identified major interneuron types, named DL-Int-1, DL-Int-2, and bilateral DL-dSEG-LP, that responded with different spiking patterns to vibration pulses applied to the antennae. Experimental and computational analyses suggest that inhibitory connection plays a role in encoding and processing the duration of vibration pulse trains in the primary auditory center of the honeybee.\"",
- "tags": [
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 762,
- "tag": "Audition"
- },
- {
- "id": 2491,
- "tag": "Brian 2 (web link to model)"
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- {
- "id": 729,
- "tag": "Invertebrate"
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- {
- "id": 564,
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- {
- "id": 2533,
- "tag": "ModelDB:239413"
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- "timestamp_created": "2024-01-12 18:37:13.926475+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/239413",
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- "username": "osbadmin"
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- "default_context": "main",
- "id": 1899,
- "name": "NN for proto-object based contour integration and figure-ground segregation (Hu & Niebur 2017)",
- "repository_type": "github",
- "summary": "\"Visual processing of objects makes use of both\r\nfeedforward and feedback streams of information. However, the nature of feedback signals is largely unknown, as\r\nis the identity of the neuronal populations in lower visual\r\nareas that receive them. Here, we develop a recurrent neural\r\nmodel to address these questions in the context of contour\r\nintegration and figure-ground segregation. A key feature\r\nof our model is the use of grouping neurons whose activity represents tentative objects (\u201cproto-objects\u201d) based on\r\nthe integration of local feature information. Grouping neurons receive input from an organized set of local feature\r\nneurons, and project modulatory feedback to those same\r\nneurons. ...\"",
- "tags": [
- {
- "id": 767,
- "tag": "MATLAB (web link to model)"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2534,
- "tag": "ModelDB:239418"
- },
- {
- "id": 726,
- "tag": "Vision"
- }
- ],
- "timestamp_created": "2024-01-12 18:37:14.413336+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/239418",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "default_context": "master",
- "id": 1900,
- "name": "Purkinje cell: Synaptic activation predicts voltage control of burst-pause (Masoli & D'Angelo 2017)",
- "repository_type": "github",
- "summary": "\"The dendritic processing in cerebellar Purkinje cells (PCs), which integrate synaptic inputs coming from hundreds of thousands granule cells and molecular layer interneurons, is still unclear. Here we have tested a leading hypothesis maintaining that the significant PC output code is represented by burst-pause responses (BPRs), by simulating PC responses in a biophysically detailed model that allowed to systematically explore a broad range of input patterns. BPRs were generated by input bursts and were more prominent in Zebrin positive than Zebrin negative (Z+ and Z-) PCs. Different combinations of parallel fiber and molecular layer interneuron synapses explained type I, II and III responses observed in vivo. BPRs were generated intrinsically by Ca-dependent K channel activation in the somato-dendritic compartment and the pause was reinforced by molecular layer interneuron inhibition. BPRs faithfully reported the duration and intensity of synaptic inputs, such that synaptic conductance tuned the number of spikes and release probability tuned their regularity in the millisecond range. ...\"",
- "tags": [
- {
- "id": 566,
- "tag": "Bursting"
- },
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 564,
- "tag": "ModelDB"
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- {
- "id": 2535,
- "tag": "ModelDB:239421"
- },
- {
- "id": 577,
- "tag": "NEURON"
- }
- ],
- "timestamp_created": "2024-01-12 18:37:14.904458+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/239421",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "auto_sync": true,
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- "id": 1901,
- "name": "Feedforward network undergoing Up-state-mediated plasticity (Gonzalez-Rueda et al. 2018)",
- "repository_type": "github",
- "summary": "Using whole-cell recordings and optogenetic stimulation of presynaptic input in anaesthetized mice, we show that synaptic plasticity rules are gated by cortical dynamics. Up states are biased towards depression such that presynaptic stimulation alone leads to synaptic depression, while connections contributing to postsynaptic spiking are protected against this synaptic weakening. We\r\nfind that this novel activity-dependent and input-specific downscaling mechanism has two important computational advantages: 1) improved signal-to-noise ratio, and 2) preservation of previously stored information. Thus, these synaptic plasticity rules provide an attractive mechanism for SWS-related synaptic downscaling and circuit refinement.\r\n\r\nWe simulate a feedforward network of neurons undergoing Up-state-mediated plasticity. Under this plasticity rule, presynaptic spikes alone lead to synaptic depression, whereas those followed by postsynaptic spikes within 10 ms are not changed.",
- "tags": [
- {
- "id": 75,
- "tag": "Homeostasis"
- },
- {
- "id": 564,
- "tag": "ModelDB"
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- {
- "id": 2536,
- "tag": "ModelDB:239427"
- },
- {
- "id": 620,
- "tag": "Python"
- },
- {
- "id": 802,
- "tag": "STDP"
- },
- {
- "id": 592,
- "tag": "Sleep"
- },
- {
- "id": 725,
- "tag": "Synaptic Plasticity"
- }
- ],
- "timestamp_created": "2024-01-12 18:37:15.414120+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/239427",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1902": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1902,
- "name": "Drosophila T4 neuron (Gruntman et al 2018)",
- "repository_type": "github",
- "summary": "Passive, multi-compartment conductance-based model of a T4 cell. The model reproduces the neuron's response to moving stimuli via integration of spatially offset fast excitatory and slow inhibitory inputs.",
- "tags": [
- {
- "id": 729,
- "tag": "Invertebrate"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2537,
- "tag": "ModelDB:239435"
- },
- {
- "id": 577,
- "tag": "NEURON"
- }
- ],
- "timestamp_created": "2024-01-12 18:37:15.926481+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/239435",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1903": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1903,
- "name": "A basal ganglia model of aberrant learning (Ursino et al. 2018)",
- "repository_type": "github",
- "summary": "A comprehensive, biologically inspired neurocomputational model of action selection in the Basal Ganglia allows simulation of dopamine induced aberrant learning in Parkinsonian subjects. In particular, the model simulates the Alternate Finger Tapping motor task as an indicator of bradykinesia.",
- "tags": [
- {
- "id": 749,
- "tag": "Long-term Synaptic Plasticity"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2538,
- "tag": "ModelDB:239530"
- },
- {
- "id": 801,
- "tag": "Parkinson's"
- },
- {
- "id": 725,
- "tag": "Synaptic Plasticity"
- }
- ],
- "timestamp_created": "2024-01-12 18:37:16.387778+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/239530",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1904": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1904,
- "name": "PyMUS: A Python based Motor Unit Simulator (Kim & Kim 2018)",
- "repository_type": "github",
- "summary": "PyMUS is a simulation software that allows for integrative investigations on the input-output processing of the motor unit system in a hierarchical manner from a single channel to the entire system behavior. Using PyMUS, a single motoneuron, muscle unit and motor unit can be separately simulated under a wide range of experimental input protocols.",
- "tags": [
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 1433,
- "tag": "I_AHP"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2539,
- "tag": "ModelDB:239535"
- },
- {
- "id": 1966,
- "tag": "Motor control"
- },
- {
- "id": 620,
- "tag": "Python"
- }
- ],
- "timestamp_created": "2024-01-12 18:37:16.892443+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/239535",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1905": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1905,
- "name": "Computational endophenotypes in addiction (Fiore et al 2018)",
- "repository_type": "github",
- "summary": "\"... here we simulated phenotypic\r\nvariations in addiction symptomology and responses to putative\r\ntreatments, using both a neural model, based on cortico-striatal\r\ncircuit dynamics, and an algorithmic model of reinforcement\r\nlearning. These simulations rely on the widely accepted assumption\r\nthat both the ventral, model-based, goal-directed system and the\r\ndorsal, model-free, habitual system are vulnerable to\r\nextra-physiologic dopamine reinforcements triggered by addictive\r\nrewards. We found that endophenotypic differences in the balance\r\nbetween the two circuit or control systems resulted in an inverted\r\nU-shape in optimal choice behavior. Specifically, greater unbalance\r\nled to a higher likelihood of developing addiction and more severe\r\ndrug-taking behaviors.\r\n...\"",
- "tags": [
- {
- "id": 841,
- "tag": "Addiction"
- },
- {
- "id": 825,
- "tag": "Learning"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2540,
- "tag": "ModelDB:239540"
- },
- {
- "id": 809,
- "tag": "Reinforcement Learning"
- }
- ],
- "timestamp_created": "2024-01-12 18:37:17.499781+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/239540",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1906": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1906,
- "name": "PKMZ synthesis and AMPAR regulation in late long-term synaptic potentiation (Helfer & Shultz 2018)",
- "repository_type": "github",
- "summary": "Stochastic simulation of a set of molecular reactions that implement late long-term potentiation (L-LTP). The model is able to account for a wide range of empirical results, including induction and maintenance of late-phase LTP, cellular memory reconsolidation and the effects of different pharmaceutical interventions.",
- "tags": [
- {
- "id": 755,
- "tag": "C or Cplusplus program"
- },
- {
- "id": 749,
- "tag": "Long-term Synaptic Plasticity"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2541,
- "tag": "ModelDB:239541"
- },
- {
- "id": 725,
- "tag": "Synaptic Plasticity"
- }
- ],
- "timestamp_created": "2024-01-12 18:37:18.018920+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/239541",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1907": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1907,
- "name": "Motoneuron pool input-output function (Powers & Heckman 2017)",
- "repository_type": "github",
- "summary": "\"Although motoneurons have often been considered\r\nto be fairly linear transducers of synaptic input, recent evidence\r\nsuggests that strong persistent inward currents (PICs) in motoneurons\r\nallow neuromodulatory and inhibitory synaptic inputs to induce large\r\nnonlinearities in the relation between the level of excitatory input and\r\nmotor output. To try to estimate the possible extent of this nonlinearity,\r\nwe developed a pool of model motoneurons designed to replicate\r\nthe characteristics of motoneuron input-output properties measured in\r\nmedial gastrocnemius motoneurons in the decerebrate cat with voltage-\r\nclamp and current-clamp techniques. We drove the model pool\r\nwith a range of synaptic inputs consisting of various mixtures of\r\nexcitation, inhibition, and neuromodulation. We then looked at the\r\nrelation between excitatory drive and total pool output. Our results\r\nrevealed that the PICs not only enhance gain but also induce a strong\r\nnonlinearity in the relation between the average firing rate of the\r\nmotoneuron pool and the level of excitatory input. The relation\r\nbetween the total simulated force output and input was somewhat\r\nmore linear because of higher force outputs in later-recruited units. ...\"",
- "tags": [
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2542,
- "tag": "ModelDB:239582"
- },
- {
- "id": 577,
- "tag": "NEURON"
- }
- ],
- "timestamp_created": "2024-01-12 18:37:18.550472+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/239582",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1908": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1908,
- "name": "Adjusted regularization of cortical covariance (Vinci et al 2018)",
- "repository_type": "github",
- "summary": "Graphical Lasso with Adjusted Regularization (GAR) useful to estimate functional connectivity.",
- "tags": [
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2543,
- "tag": "ModelDB:239741"
- },
- {
- "id": 1754,
- "tag": "R"
- }
- ],
- "timestamp_created": "2024-01-12 18:37:19.058325+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/239741",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1909": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1909,
- "name": "Signaling pathways In D1R containing striatal spiny projection neurons (Blackwell et al 2018)",
- "repository_type": "github",
- "summary": "We implemented a mechanistic model of signaling pathways activated by dopamine D1 receptors, acetylcholine receptors, and glutamate. We use our novel, computationally efficient simulator, NeuroRD, to simulate stochastic interactions both within and between dendritic spines. Results show that the combined activity of several key plasticity molecules correctly predicts the occurrence of either LTP, LTD or no plasticity for numerous experimental protocols.",
- "tags": [
- {
- "id": 839,
- "tag": "Alcohol Use Disorder"
- },
- {
- "id": 781,
- "tag": "G-protein coupled"
- },
- {
- "id": 749,
- "tag": "Long-term Synaptic Plasticity"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2544,
- "tag": "ModelDB:239744"
- },
- {
- "id": 1542,
- "tag": "NeuroRD"
- },
- {
- "id": 751,
- "tag": "Signaling pathways"
- }
- ],
- "timestamp_created": "2024-01-12 18:37:19.573050+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/239744",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1910": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1910,
- "name": "Cortical feedback alters visual response properties of dLGN relay cells (Mart\u00ednez-Ca\u00f1ada et al 2018)",
- "repository_type": "github",
- "summary": "Network model that includes biophysically detailed, single-compartment and multicompartment neuron models of relay-cells and interneurons in the dLGN and a population of orientation-selective layer 6 simple cells, consisting of pyramidal cells (PY). We have considered two different arrangements of synaptic feedback from the ON and OFF zones in the visual cortex to the dLGN: phase-reversed (\u2018push-pull\u2019) and phase-matched (\u2018push-push\u2019), as well as different spatial extents of the corticothalamic projection pattern. This project is the result of a research work and its associated publication is: (Mart\u00ednez-Ca\u00f1ada et al 2018).\r\nInstallation instructions as well as the latest version can be found in the Github repository: https://github.com/CINPLA/biophysical_thalamocortical_system",
- "tags": [
- {
- "id": 2417,
- "tag": "LFPy"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2545,
- "tag": "ModelDB:239878"
- },
- {
- "id": 611,
- "tag": "NEST"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 620,
- "tag": "Python"
- },
- {
- "id": 726,
- "tag": "Vision"
- }
- ],
- "timestamp_created": "2024-01-12 18:37:20.059945+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/239878",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1911": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1911,
- "name": "Parallel odor processing by mitral and middle tufted cells in the OB (Cavarretta et al 2016, 2018)",
- "repository_type": "github",
- "summary": "\"[...] experimental findings suggest that\r\nMC and mTC may encode parallel and complementary odor representations. We\r\nhave analyzed the functional roles of these pathways by using a morphologically\r\nand physiologically realistic three-dimensional model to explore the MC and\r\nmTC microcircuits in the glomerular layer and deeper plexiform layers. [...]\"\r\n",
- "tags": [
- {
- "id": 727,
- "tag": "Action Potential Initiation"
- },
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 579,
- "tag": "Active Dendrites"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 783,
- "tag": "I_Ks"
- },
- {
- "id": 749,
- "tag": "Long-term Synaptic Plasticity"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2546,
- "tag": "ModelDB:240116"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 588,
- "tag": "Olfaction"
- },
- {
- "id": 719,
- "tag": "Pattern Recognition"
- },
- {
- "id": 821,
- "tag": "Sensory coding"
- },
- {
- "id": 758,
- "tag": "Sensory processing"
- },
- {
- "id": 587,
- "tag": "Spatio-temporal Activity Patterns"
- },
- {
- "id": 596,
- "tag": "Synaptic Integration"
- },
- {
- "id": 586,
- "tag": "Synchronization"
- },
- {
- "id": 720,
- "tag": "Temporal Pattern Generation"
- }
- ],
- "timestamp_created": "2024-01-12 18:37:20.565840+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/240116",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
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- "id": 1912,
- "name": "External Tufted Cell Model (Ryan Viertel, Alla Borisyuk 2019)",
- "repository_type": "github",
- "summary": "ODE model of the Mammalian External Tufted Cell",
- "tags": [
- {
- "id": 755,
- "tag": "C or Cplusplus program"
- },
- {
- "id": 1560,
- "tag": "I Ca,p"
- },
- {
- "id": 576,
- "tag": "I K"
- },
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- "id": 739,
- "tag": "I Na,p"
- },
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- "id": 574,
- "tag": "I Na,t"
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- "id": 2547,
- "tag": "ModelDB:240364"
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- "id": 759,
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- ],
- "timestamp_created": "2024-01-12 18:37:21.187346+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/240364",
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- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
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- "id": 1913,
- "name": "First-Spike-Based Visual Categorization Using Reward-Modulated STDP (Mozafari et al. 2018)",
- "repository_type": "github",
- "summary": "\"...Here, for the first time,\r\nwe show that (Reinforcement Learning) RL can be used efficiently to train a spiking neural\r\nnetwork (SNN) to perform object recognition in natural images\r\nwithout using an external classifier. We used a feedforward\r\nconvolutional SNN and a temporal coding scheme where the\r\nmost strongly activated neurons fire first, while less activated\r\nones fire later, or not at all. In the highest layers, each neuron\r\nwas assigned to an object category, and it was assumed that\r\nthe stimulus category was the category of the first neuron to\r\nfire. ...\"\r\n",
- "tags": [
- {
- "id": 2548,
- "tag": "C#"
- },
- {
- "id": 564,
- "tag": "ModelDB"
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- "id": 2549,
- "tag": "ModelDB:240369"
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- "id": 809,
- "tag": "Reinforcement Learning"
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- "id": 859,
- "tag": "Reward-modulated STDP"
- },
- {
- "id": 802,
- "tag": "STDP"
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- {
- "id": 2475,
- "tag": "Temporal Coding"
- },
- {
- "id": 726,
- "tag": "Vision"
- },
- {
- "id": 822,
- "tag": "Winner-take-all"
- }
- ],
- "timestamp_created": "2024-01-12 18:37:21.824574+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/240369",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "default_context": "master",
- "id": 1914,
- "name": "Effect of cortical D1 receptor sensitivity on working memory maintenance (Reneaux & Gupta 2018)",
- "repository_type": "github",
- "summary": "Alterations in cortical D1 receptor density and reactivity of dopamine-binding sites, collectively termed as D1 receptor-sensitivity in the present study, have been experimentally shown to affect the working memory maintenance during delay-period. However, computational models addressing the effect of D1 receptor-sensitivity are lacking. A quantitative neural mass model of the prefronto-mesoprefrontal system has been proposed to take into account the effect of variation in cortical D1 receptor-sensitivity on working memory maintenance during delay. The model computes the delay-associated equilibrium states/operational points of the system for different values of D1 receptor-sensitivity through the nullcline and bifurcation analysis. Further, to access the robustness of the working memory maintenance during delay in the presence of alteration in D1 receptor-sensitivity, numerical simulations of the stochastic formulation of the model are performed to obtain the global potential landscape of the dynamics.\r\n",
- "tags": [
- {
- "id": 804,
- "tag": "Bifurcation"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2550,
- "tag": "ModelDB:240382"
- },
- {
- "id": 845,
- "tag": "Schizophrenia"
- },
- {
- "id": 1576,
- "tag": "Stochastic simulation"
- },
- {
- "id": 794,
- "tag": "Working memory"
- }
- ],
- "timestamp_created": "2024-01-12 18:37:22.320579+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/240382",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "default_context": "main",
- "id": 1915,
- "name": "MDD: the role of glutamate dysfunction on Cingulo-Frontal NN dynamics (Ramirez-Mahaluf et al 2017)",
- "repository_type": "github",
- "summary": "\" ...Currently, no mechanistic framework describes how network dynamics, glutamate, and serotonin interact to explain MDD symptoms and treatments. Here, we built a biophysical computational model of 2 areas (vACC and dlPFC) that can switch between emotional and cognitive processing. (Major Depression Disease) MDD networks were simulated by slowing glutamate decay in vACC and demonstrated sustained vACC activation. ...\"",
- "tags": [
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 2042,
- "tag": "Beta oscillations"
- },
- {
- "id": 2495,
- "tag": "Brian (web link to model)"
- },
- {
- "id": 831,
- "tag": "Deep brain stimulation"
- },
- {
- "id": 1799,
- "tag": "Gamma oscillations"
- },
- {
- "id": 2423,
- "tag": "Major Depression Disease (MDD)"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2551,
- "tag": "ModelDB:240954"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- }
- ],
- "timestamp_created": "2024-01-12 18:37:22.820551+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/240954",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "id": 1916,
- "name": "Extracellular fields for a three-dimensional network of cells using NEURON (Appukuttan et al 2017)",
- "repository_type": "github",
- "summary": "\" ... In the present work, we demonstrate a technique to couple the extracellular fields of individual cells within the NEURON simulation environment. The existing features of the simulator are extended by explicitly defining current balance equations, resulting in the coupling of the extracellular fields of adjacent cells. ...\"",
- "tags": [
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- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 733,
- "tag": "Ephaptic coupling"
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- "id": 734,
- "tag": "Extracellular Fields"
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- "tag": "Methods"
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- "id": 564,
- "tag": "ModelDB"
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- "id": 2552,
- "tag": "ModelDB:240957"
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- "id": 577,
- "tag": "NEURON"
- }
- ],
- "timestamp_created": "2024-01-12 18:37:23.299287+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/240957",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1917": {
- "auto_sync": true,
- "content_types": "modeling",
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- "modeling"
- ],
- "default_context": "master",
- "id": 1917,
- "name": "CA1 pyramidal neuron: Persistent Na current mediates steep synaptic amplification (Hsu et al 2018)",
- "repository_type": "github",
- "summary": "This paper shows that persistent sodium current critically contributes to the subthreshold nonlinear dynamics of CA1 pyramidal neurons and promotes rapidly reversible conversion between place-cell and silent-cell in the hippocampus. A simple model built with realistic axo-somatic voltage-gated sodium channels in CA1 (Carter et al., 2012; Neuron 75, 1081\u20131093) demonstrates that the biophysics of persistent sodium current is sufficient to explain the synaptic amplification effects. A full model built previously (Grienberger et al., 2017; Nature Neuroscience, 20(3): 417\u2013426) with detailed morphology, ion channel types and biophysical properties of CA1 place cells naturally reproduces the steep voltage dependence of synaptic responses.",
- "tags": [
- {
- "id": 579,
- "tag": "Active Dendrites"
- },
- {
- "id": 1606,
- "tag": "Conductance distributions"
- },
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 786,
- "tag": "Electrotonus"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 580,
- "tag": "I M"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 567,
- "tag": "Ion Channel Kinetics"
- },
- {
- "id": 748,
- "tag": "Markov-type model"
- },
- {
- "id": 2122,
- "tag": "Membrane Properties"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2553,
- "tag": "ModelDB:240960"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 799,
- "tag": "Place cell/field"
- },
- {
- "id": 2554,
- "tag": "Synaptic Amplification"
- },
- {
- "id": 596,
- "tag": "Synaptic Integration"
- }
- ],
- "timestamp_created": "2024-01-12 18:37:23.795886+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/240960",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "1918": {
- "auto_sync": true,
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- "id": 1918,
- "name": "Actions of Rotenone on ionic currents and MEPPs in Mouse Hippocampal Neurons (Huang et al 2018) ",
- "repository_type": "github",
- "summary": "\" ... With the aid of patch-clamp technology and simulation modeling,\r\nthe effects of (Rotenone) Rot on membrane ion currents present in\r\nmHippoE-14 cells were investigated. Results: Addition of Rot produced\r\nan inhibitory action on the peak amplitude of INa ...; however,\r\nneither activation nor inactivation kinetics of INa was changed during\r\ncell exposure to this compound. Addition of Rot produced little or no\r\nmodifications in the steady-state inactivation curve of INa. Rot\r\nincreased the amplitude of Ca2+-activated Cl- current in response to\r\nmembrane depolarization ... . Moreover, when these cells were exposed\r\nto 10 \u00b5M Rot, a specific population of ATP-sensitive K+ channels\r\n... was measured, despite its inability to alter single-channel\r\nconductance. Under current clamp condition, the frequency of miniature\r\nend-plate potentials in mHippoE-14 cells was significantly raised in\r\nthe presence of Rot (10 \u00b5M) with no changes in their amplitude and\r\ntime course of rise and decay. In simulated model of hippocampal\r\nneurons incorporated with chemical autaptic connection, increased\r\nautaptic strength to mimic the action of Rot was noted to change the\r\nbursting pattern with emergence of subthreshold\r\npotentials. Conclusions: The Rot effects presented herein might exert\r\na significant action on functional activities of hippocampal neurons\r\noccurring in vivo. \"",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 566,
- "tag": "Bursting"
- },
- {
- "id": 733,
- "tag": "Ephaptic coupling"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
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- "id": 747,
- "tag": "I_KD"
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- "id": 564,
- "tag": "ModelDB"
- },
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- "id": 2555,
- "tag": "ModelDB:240961"
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- "id": 759,
- "tag": "XPPAUT"
- }
- ],
- "timestamp_created": "2024-01-12 18:37:24.335759+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/240961",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
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- "id": 1919,
- "name": "AP initiation, propagation, and cortical invasion in a Layer 5 pyramidal cell (Anderson et 2018)",
- "repository_type": "github",
- "summary": "\" ... High frequency (~130 Hz) deep brain stimulation (DBS) of\r\nthe subthalamic region is an established clinical therapy for the\r\ntreatment of late stage Parkinson's disease (PD). Direct modulation of\r\nthe hyperdirect pathway, defined as cortical layer V pyramidal neurons\r\nthat send an axon collateral to the subthalamic nucleus (STN), has\r\nemerged as a possible component of the therapeutic mechanisms.\r\n...We found robust AP propagation throughout the complex axonal\r\narbor of the hyperdirect neuron. Even at therapeutic DBS frequencies,\r\nstimulation induced APs could reach all of the intracortical axon\r\nterminals with ~100% fidelity. The functional result of this high\r\nfrequency axonal driving of the thousands of synaptic connections made\r\nby each directly stimulated hyperdirect neuron is a profound synaptic\r\nsuppression that would effectively disconnect the neuron from the\r\ncortical circuitry. ...\"",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 831,
- "tag": "Deep brain stimulation"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2556,
- "tag": "ModelDB:241160"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 801,
- "tag": "Parkinson's"
- }
- ],
- "timestamp_created": "2024-01-12 18:37:24.994579+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/241160",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1920": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1920,
- "name": "Biophysically realistic neuron models for simulation of cortical stimulation (Aberra et al. 2018)",
- "repository_type": "github",
- "summary": "This archive instantiates the single-cell cortical models used in (Aberra et al. 2018) and sets up extracellular stimulation with either a point-current source, to simulate intracortical microstimulation (ICMS), or a uniform E-field distribution, with a monophasic, rectangular pulse waveform in both cases. ",
- "tags": [
- {
- "id": 727,
- "tag": "Action Potential Initiation"
- },
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2557,
- "tag": "ModelDB:241165"
- },
- {
- "id": 577,
- "tag": "NEURON"
- }
- ],
- "timestamp_created": "2024-01-12 18:37:25.609888+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/241165",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1921": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 1921,
- "name": "M-current in a collision detection neuron (LGMD model) (Dewell & Gabbiani 2018) ",
- "repository_type": "github",
- "summary": "\" ...In this study, we demonstrate that the LGMD (Lobula Giant Movement Detector) neuron exhibits a large M\r\ncurrent, generated by noninactivating K\u0002 channels, that shortens the temporal window of dendritic integration, regulates a firing mode switch between burst and isolated spiking, increases the precision of spike timing, and increases the reliability of spike propagation to\r\ndownstream motor centers. ...\"",
- "tags": [
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 580,
- "tag": "I M"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 2122,
- "tag": "Membrane Properties"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2558,
- "tag": "ModelDB:241169"
- },
- {
- "id": 577,
- "tag": "NEURON"
- }
- ],
- "timestamp_created": "2024-01-12 18:37:26.158456+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/241169",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1922": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1922,
- "name": "Role of afferent-hair cell connectivity in determining spike train regularity (Holmes et al 2017)",
- "repository_type": "github",
- "summary": "\"Vestibular bouton afferent terminals in turtle utricle\r\ncan be categorized into four types depending on their location and\r\nterminal arbor structure: lateral extrastriolar (LES), striolar, juxtastriolar,\r\nand medial extrastriolar (MES). The terminal arbors of these\r\nafferents differ in surface area, total length, collecting area, number of\r\nboutons, number of bouton contacts per hair cell, and axon diameter\r\n(Huwe JA, Logan CJ, Williams B, Rowe MH, Peterson EH. J\r\nNeurophysiol 113: 2420 \u20132433, 2015). To understand how differences\r\nin terminal morphology and the resulting hair cell inputs might affect\r\nafferent response properties, we modeled representative afferents\r\nfrom each region, using reconstructed bouton afferents. ...\"",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 589,
- "tag": "I L high threshold"
- },
- {
- "id": 580,
- "tag": "I M"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 747,
- "tag": "I_KD"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2559,
- "tag": "ModelDB:241240"
- },
- {
- "id": 577,
- "tag": "NEURON"
- }
- ],
- "timestamp_created": "2024-01-12 18:37:26.652231+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/241240",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "auto_sync": true,
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- "default_context": "master",
- "id": 1923,
- "name": "Contribution of the axon initial segment to APs recorded extracellularly (Telenczuk et al 2018)",
- "repository_type": "github",
- "summary": "\"... It\r\nwas recently proposed that at onset of an (Action Potential) AP the soma and the (Axon Initial Segment) AIS form\r\na dipole.\r\n\r\nWe study the extracellular signature (the extracellular\r\naction potential, EAP) generated by such a dipole.\r\n\r\nFirst, we\r\ndemonstrate the formation of the dipole and its extracellular\r\nsignature in detailed morphological models of a reconstructed\r\npyramidal neuron.\r\n\r\nThen, we study the EAP waveform and its spatial\r\ndependence in models with axonal AP initiation and contrast it with\r\nthe EAP obtained in models with somatic AP initiation.\r\n\r\nWe show that in\r\nthe models with axonal AP initiation the dipole forms between\r\nsomatodendritic compartments and the AIS, and not between soma and\r\ndendrites as in the classical models.\r\n...\"",
- "tags": [
- {
- "id": 727,
- "tag": "Action Potential Initiation"
- },
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 728,
- "tag": "Axonal Action Potentials"
- },
- {
- "id": 734,
- "tag": "Extracellular Fields"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2560,
- "tag": "ModelDB:241796"
- },
- {
- "id": 743,
- "tag": "NEURON (web link to model)"
- },
- {
- "id": 853,
- "tag": "Python (web link to model)"
- }
- ],
- "timestamp_created": "2024-01-12 18:37:27.155167+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/241796",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1924": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1924,
- "name": "Genetic, biochemical and bioelectrical dynamics in pattern regulation (Pietak & Levin 2017)",
- "repository_type": "github",
- "summary": "\"Gene regulatory networks (GRNs) describe interactions between gene\r\nproducts and transcription factors that control gene expression. In\r\ncombination with reaction\u2013diffusion models, GRNs have enhanced\r\ncomprehension of biological pattern formation. However, although it is\r\nwell known that biological systems exploit an interplay of genetic and\r\nphysical mechanisms, instructive factors such as transmembrane\r\npotential (Vmem) have not been integrated into full GRN models. Here\r\nwe extend regulatory networks to include bioelectric signalling,\r\ndeveloping a novel synthesis: the bioelectricity-integrated gene and\r\nreaction (BIGR) network.\r\n...\"",
- "tags": [
- {
- "id": 2561,
- "tag": "BETSE (web link to model)"
- },
- {
- "id": 2211,
- "tag": "Electrical-chemical"
- },
- {
- "id": 75,
- "tag": "Homeostasis"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2562,
- "tag": "ModelDB:241826"
- },
- {
- "id": 1919,
- "tag": "Reaction-diffusion"
- },
- {
- "id": 751,
- "tag": "Signaling pathways"
- }
- ],
- "timestamp_created": "2024-01-12 18:37:27.727526+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/241826",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1925": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1925,
- "name": "Place and grid cells in a loop (Renn\u00f3-Costa & Tort 2017)",
- "repository_type": "github",
- "summary": "This model implements a loop circuit between place and grid cells. The model was used to explain place cell remapping and grid cell realignment. Grid cell model as a continuous attractor network. Place cells have recurrent attractor network. Rate models implemented with E%-MAX winner-take-all network dynamics, with gamma cycle time-step.",
- "tags": [
- {
- "id": 1799,
- "tag": "Gamma oscillations"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2563,
- "tag": "ModelDB:241932"
- },
- {
- "id": 2064,
- "tag": "Pattern Separation"
- },
- {
- "id": 799,
- "tag": "Place cell/field"
- },
- {
- "id": 620,
- "tag": "Python"
- },
- {
- "id": 791,
- "tag": "Rate-coding model neurons"
- },
- {
- "id": 725,
- "tag": "Synaptic Plasticity"
- },
- {
- "id": 822,
- "tag": "Winner-take-all"
- }
- ],
- "timestamp_created": "2024-01-12 18:37:28.214119+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/241932",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1926": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1926,
- "name": "Convergence regulates synchronization-dependent AP transfer in feedforward NNs (Sailamul et al 2017)",
- "repository_type": "github",
- "summary": "We study how synchronization-dependent spike transfer can be affected by the structure of convergent feedforward wiring. \r\n\r\nWe implemented computer simulations of model neural networks: a source and a target layer connected with different types of convergent wiring rules. In the Gaussian-Gaussian (GG) model, both the connection probability and the strength are given as Gaussian distribution as a function of spatial distance. In the Uniform-Constant (UC) and Uniform-Exponential (UE) models, the connection probability density is a uniform constant within a certain range, but the connection strength is set as a constant value or an exponentially decaying function, respectively.\r\n\r\nThen we examined how the spike transfer function is modulated under these conditions, while static or synchronized input patterns were introduced to simulate different levels of feedforward spike synchronization. \r\nWe observed that the synchronization-dependent modulation of the transfer function appeared noticeably different for each convergence condition. The modulation of the spike transfer function was largest in the UC model, and smallest in the UE model. Our analysis showed that this difference was induced by the different spike weight distributions that was generated from convergent synapses in each model.\r\n\r\n Our results suggest that the structure of the feedforward convergence is a crucial factor for correlation-dependent spike control, thus must be considered important to understand the mechanism of information transfer in the brain.",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 1531,
- "tag": "I Cl, leak"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 575,
- "tag": "I T low threshold"
- },
- {
- "id": 1478,
- "tag": "Information transfer"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2564,
- "tag": "ModelDB:241979"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 768,
- "tag": "Synaptic Convergence"
- },
- {
- "id": 586,
- "tag": "Synchronization"
- }
- ],
- "timestamp_created": "2024-01-12 18:37:28.780243+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/241979",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1927": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 1927,
- "name": "Modeling brain dynamics in brain tumor patients using the Virtual Brain (Aerts et al 2018)",
- "repository_type": "github",
- "summary": "\"Presurgical planning for brain tumor resection aims at delineating\r\neloquent tissue in the vicinity of the lesion to spare during\r\nsurgery. \r\n... we simulated large-scale brain dynamics in 25\r\nhuman brain tumor patients and 11 human control participants using The\r\nVirtual Brain, an open-source neuroinformatics platform. Local and\r\nglobal model parameters of the Reduced Wong\u2013Wang model were\r\nindividually optimized and compared between brain tumor patients and\r\ncontrol subjects. In addition, the relationship between model\r\nparameters and structural network topology and cognitive performance\r\nwas assessed. Results showed (1) significantly improved prediction\r\naccuracy of individual functional connectivity when using individually\r\noptimized model parameters; (2) local model parameters that can\r\ndifferentiate between regions directly affected by a tumor, regions\r\ndistant from a tumor, and regions in a healthy brain; and (3)\r\ninteresting associations between individually optimized model\r\nparameters and structural network topology and cognitive performance.\"",
- "tags": [
- {
- "id": 2565,
- "tag": "Brain Tumor"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2566,
- "tag": "ModelDB:243212"
- },
- {
- "id": 2567,
- "tag": "The Virtual Brain (web link to model)"
- }
- ],
- "timestamp_created": "2024-01-12 18:37:29.355689+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/243212",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1928": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1928,
- "name": "Model of the hippocampus over the sleep-wake cycle using Hodgkin-Huxley neurons (Aussel et al 2018)",
- "repository_type": "github",
- "summary": "\" ...we propose a\r\ncomputational model of the hippocampal formation based on a\r\nrealistic topology and synaptic connectivity, and we analyze the\r\neffect of different changes on the network, namely the variation\r\nof synaptic conductances, the variations of the CAN channel\r\nconductance and the variation of inputs. By using a detailed\r\nsimulation of intracerebral recordings, we show that this is able\r\nto reproduce both the theta-nested gamma oscillations that are\r\nseen in awake brains and the sharp-wave ripple complexes measured\r\nduring slow-wave sleep. The results of our simulations support\r\nthe idea that the functional connectivity of the hippocampus,\r\nmodulated by the sleep-wake variations in Acetylcholine\r\nconcentration, is a key factor in controlling its rhythms.\"",
- "tags": [
- {
- "id": 2255,
- "tag": "Brian 2"
- },
- {
- "id": 1799,
- "tag": "Gamma oscillations"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2568,
- "tag": "ModelDB:243350"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 592,
- "tag": "Sleep"
- },
- {
- "id": 2384,
- "tag": "Theta oscillations"
- }
- ],
- "timestamp_created": "2024-01-12 18:37:29.829309+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/243350",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1929": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1929,
- "name": "Voltage- and Branch-specific Climbing Fiber Responses in Purkinje Cells (Zang et al 2018)",
- "repository_type": "github",
- "summary": "\"Climbing fibers (CFs) provide instructive signals driving cerebellar\r\nlearning, but mechanisms causing the variable CF responses in Purkinje\r\ncells (PCs) are not fully understood. Using a new experimentally\r\nvalidated PC model, we unveil the ionic mechanisms underlying\r\nCF-evoked distinct spike waveforms on different parts of the PC. We\r\ndemonstrate that voltage can gate both the amplitude and the spatial\r\nrange of CF-evoked Ca2+ influx by the availability of K+\r\ncurrents.\r\n...\r\nThe voltage- and\r\nbranch-specific CF responses can increase dendritic computational\r\ncapacity and enable PCs to actively integrate CF signals.\"",
- "tags": [
- {
- "id": 727,
- "tag": "Action Potential Initiation"
- },
- {
- "id": 579,
- "tag": "Active Dendrites"
- },
- {
- "id": 1684,
- "tag": "Ca pump"
- },
- {
- "id": 565,
- "tag": "Dendritic Action Potentials"
- },
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 739,
- "tag": "I Na,p"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2569,
- "tag": "ModelDB:243446"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 596,
- "tag": "Synaptic Integration"
- }
- ],
- "timestamp_created": "2024-01-12 18:37:30.355898+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/243446",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1930": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1930,
- "name": "SHOT-CA3, RO-CA1 Training, & Simulation CODE in models of hippocampal replay (Nicola & Clopath 2019)",
- "repository_type": "github",
- "summary": "In this code, we model the interaction between the medial septum and hippocampus as a FORCE trained, dual oscillator model. One oscillator corresponds to the medial septum and serves as an input, while a FORCE trained network of LIF neurons acts as a model of the CA3. We refer to this entire model as the Septal Hippocampal Oscillator Theta (or SHOT) network. \r\n\r\nThe code contained in this upload allows a user to train a SHOT network, train a population of reversion interneurons, and simulate the SHOT-CA3 and RO-CA1 networks after training. The code scripts are labeled to correspond to the figure from the manuscript. \r\n\r\n",
- "tags": [
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 2436,
- "tag": "Memory"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2570,
- "tag": "ModelDB:243447"
- }
- ],
- "timestamp_created": "2024-01-12 18:37:30.889265+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/243447",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1931": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1931,
- "name": "Computational model of bladder small DRG neuron soma (Mandge & Manchanda 2018)",
- "repository_type": "github",
- "summary": "Bladder small DRG neurons, which are putative nociceptors pivotal to urinary bladder function, express more than a dozen different ionic membrane mechanisms: ion channels, pumps and exchangers. Small-conductance Ca2+-activated K+ (SKCa) channels which were earlier thought to be gated solely by intracellular Ca2+ concentration ([Ca]i ) have recently been shown to exhibit inward rectification with respect to membrane potential. The effect of SKCa inward rectification on the excitability of these neurons is unknown. Furthermore, studies on the role of KCa channels in repetitive firing and their contributions to different types of afterhyperpolarization (AHP) in these neurons are lacking. In order to study these phenomena, we first constructed and validated a biophysically detailed single compartment model of bladder small DRG soma constrained by physiological data. The model includes twenty-two major known membrane mechanisms along with intracellular Ca2+ dynamics comprising Ca2+ diffusion, cytoplasmic buffering, and endoplasmic reticulum (ER) and mitochondrial mechanisms. Using modelling studies, we show that inward rectification of SKCa is an important parameter regulating neuronal repetitive firing and that its absence reduces action potential (AP) firing frequency. We also show that SKCa is more potent in reducing AP spiking than the large-conductance KCa channel (BKCa) in these neurons. Moreover, BKCa was found to contribute to the fast AHP (fAHP) and SKCa to the medium-duration (mAHP) and slow AHP (sAHP). We also report that the slow inactivating A-type K+ channel (slow KA) current in these neurons is composed of 2 components: an initial fast inactivating (time constant ~ 25-100 ms) and a slow inactivating (time constant ~ 200-800 ms) current. We discuss the implications of our findings, and how our detailed model can help further our understanding of the role of C-fibre afferents in the physiology of urinary bladder as well as in certain disorders.",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 1684,
- "tag": "Ca pump"
- },
- {
- "id": 572,
- "tag": "Calcium dynamics"
- },
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 730,
- "tag": "I A, slow"
- },
- {
- "id": 2571,
- "tag": "I Ca SOCC"
- },
- {
- "id": 780,
- "tag": "I Cl,Ca"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 589,
- "tag": "I L high threshold"
- },
- {
- "id": 580,
- "tag": "I M"
- },
- {
- "id": 721,
- "tag": "I N"
- },
- {
- "id": 2162,
- "tag": "I Na, slow inactivation"
- },
- {
- "id": 739,
- "tag": "I Na,p"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 844,
- "tag": "I R"
- },
- {
- "id": 575,
- "tag": "I T low threshold"
- },
- {
- "id": 1963,
- "tag": "I TRPM8"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 742,
- "tag": "I p,q"
- },
- {
- "id": 2318,
- "tag": "IK Bkca"
- },
- {
- "id": 2319,
- "tag": "IK Skca"
- },
- {
- "id": 861,
- "tag": "I_K,Na"
- },
- {
- "id": 747,
- "tag": "I_KD"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2572,
- "tag": "ModelDB:243448"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 738,
- "tag": "Na/Ca exchanger"
- },
- {
- "id": 740,
- "tag": "Na/K pump"
- },
- {
- "id": 775,
- "tag": "Nociception"
- }
- ],
- "timestamp_created": "2024-01-12 18:37:31.419454+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/243448",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1932": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1932,
- "name": "Disentangling astroglial physiology with a realistic cell model in silico (Savtchenko et al 2018)",
- "repository_type": "github",
- "summary": "\"Electrically non-excitable astroglia take up neurotransmitters, buffer extracellular K+ and generate Ca2+ signals that release molecular regulators of neural circuitry. The underlying machinery remains enigmatic, mainly because the sponge-like astrocyte morphology has been difficult to access experimentally or explore theoretically. Here, we systematically incorporate multi-scale, tri-dimensional astroglial architecture into a realistic multi-compartmental cell model, which we constrain by empirical tests and integrate into the NEURON computational biophysical environment. This approach is implemented as a flexible astrocyte-model builder ASTRO. As a proof-of-concept, we explore an in silico astrocyte to evaluate basic cell physiology features inaccessible experimentally. ...\"",
- "tags": [
- {
- "id": 755,
- "tag": "C or Cplusplus program"
- },
- {
- "id": 572,
- "tag": "Calcium dynamics"
- },
- {
- "id": 790,
- "tag": "Calcium waves"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 1931,
- "tag": "Kir"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 2122,
- "tag": "Membrane Properties"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2573,
- "tag": "ModelDB:243508"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 1808,
- "tag": "Potassium buffering"
- },
- {
- "id": 1974,
- "tag": "Volume transmission"
- }
- ],
- "timestamp_created": "2024-01-12 18:37:32.063054+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/243508",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1933": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1933,
- "name": "QIF method to estimate synaptic conductances (Vich et al 2017)",
- "repository_type": "github",
- "summary": "\"Subthreshold fluctuations in neuronal membrane potential traces\r\ncontain nonlinear components, and employing nonlinear models might\r\nimprove the statistical inference. We propose a new strategy to\r\nestimate synaptic conductances, which has been tested using in silico\r\ndata and applied to in vivo recordings. The model is constructed to\r\ncapture the nonlinearities caused by subthreshold activated currents,\r\nand the estimation procedure can discern between excitatory and\r\ninhibitory conductances using only one membrane potential trace.\r\n... The results show an improvement\r\ncompared to existent procedures for the models tested here.\"\r\n",
- "tags": [
- {
- "id": 1983,
- "tag": "Conductances estimation"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2574,
- "tag": "ModelDB:243510"
- }
- ],
- "timestamp_created": "2024-01-12 18:37:32.617617+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/243510",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1934": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1934,
- "name": "An oscillatory neural autoencoder based on frequency modulation and multiplexing (Soman et al 2018)",
- "repository_type": "github",
- "summary": "\" ... We propose here an oscillatory neural network model that performs the function of an autoencoder. The model is a hybrid of rate-coded neurons and neural oscillators. Input signals modulate the frequency of the neural encoder oscillators. These signals are then multiplexed using a network of rate-code neurons that has afferent Hebbian and lateral anti-Hebbian connectivity, termed as Lateral Anti Hebbian Network (LAHN). Finally the LAHN output is de-multiplexed using an output neural layer which is a combination of adaptive Hopf and Kuramoto oscillators for the signal reconstruction. The Kuramoto-Hopf combination performing demodulation is a novel way of describing a neural phase-locked loop. The proposed model is tested using both synthetic signals and real world EEG signals. The proposed model arises out of the general motivation to construct biologically inspired, oscillatory versions of some of the standard neural network models, and presents itself as an autoencoder network based on oscillatory neurons applicable to time series signals. As a demonstration, the model is applied to compression of EEG signals.\"",
- "tags": [
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2575,
- "tag": "ModelDB:243595"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- }
- ],
- "timestamp_created": "2024-01-12 18:37:33.127402+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/243595",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1935": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1935,
- "name": "Human somatosensory and motor axon pair to compare thresholds (Gaines et al 2018)",
- "repository_type": "github",
- "summary": "These motor and sensory axon models are based on the MRG axon model and the Howells motor and sensory compartment models. They take into account known differences in the channel properties between sensory and motor neurons.",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 793,
- "tag": "Development"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2576,
- "tag": "ModelDB:243841"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 764,
- "tag": "Touch"
- }
- ],
- "timestamp_created": "2024-01-12 18:37:33.629515+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/243841",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1936": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1936,
- "name": "Action potential of mouse urinary bladder smooth muscle (Mahapatra et al 2018)",
- "repository_type": "github",
- "summary": "Urinary incontinence is associated with enhanced spontaneous phasic contractions of the detrusor smooth muscle (DSM). Although a complete understanding of the etiology of these spontaneous contractions is not yet established, it is suggested that the spontaneously evoked action potentials (sAPs) in DSM cells initiate and modulate the contractions. In order to further our understanding of the ionic mechanisms underlying sAP generation, we present here a biophysically detailed computational model of a single DSM cell. First, we constructed mathematical models for nine ion channels found in DSM cells based on published experimental data: two voltage-gated Ca2+ ion channels, an hyperpolarization-activated ion channel, two voltage-gated K+ ion channels, three Ca2+-activated K+ ion channels and a non-specific background leak ion channel. Incorporating these channels, our DSM model is capable of reproducing experimentally recorded spike-type sAPs of varying configurations, ranging from sAPs displaying after-hyperpolarizations to sAPs displaying after-depolarizations. Our model, constrained heavily by physiological data, provides a powerful tool to investigate the ionic mechanisms underlying the genesis of DSM electrical activity, which can further shed light on certain aspects of urinary bladder function and dysfunction.",
- "tags": [
- {
- "id": 795,
- "tag": "ATP-senstive potassium current"
- },
- {
- "id": 727,
- "tag": "Action Potential Initiation"
- },
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 572,
- "tag": "Calcium dynamics"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 589,
- "tag": "I L high threshold"
- },
- {
- "id": 575,
- "tag": "I T low threshold"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 2318,
- "tag": "IK Bkca"
- },
- {
- "id": 2319,
- "tag": "IK Skca"
- },
- {
- "id": 567,
- "tag": "Ion Channel Kinetics"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2577,
- "tag": "ModelDB:243842"
- },
- {
- "id": 577,
- "tag": "NEURON"
- }
- ],
- "timestamp_created": "2024-01-12 18:37:34.124886+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/243842",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1937": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 1937,
- "name": "A biophysical model of vestibular ganglion neurons (Hight & Kalluri 2016, Ventura & Kalluri 2018) ",
- "repository_type": "github",
- "summary": "A single compartment model in Matlab to represent vestibular ganglion neurons' somatic ion channels and their influence on firing patterns. Model is connected to a synthetic synaptic conductance to examine the relative influence of synaptic inputs and low-voltage gated potassium conductances on spike patterns.",
- "tags": [
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 769,
- "tag": "I_KHT"
- },
- {
- "id": 770,
- "tag": "I_KLT"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2578,
- "tag": "ModelDB:244202"
- },
- {
- "id": 569,
- "tag": "Simplified Models"
- }
- ],
- "timestamp_created": "2024-01-12 18:37:34.922811+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/244202",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1938": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1938,
- "name": "A full-scale cortical microcircuit spiking network model (Shimoura et al 2018)",
- "repository_type": "github",
- "summary": "Reimplementation in BRIAN 2 simulator of a full-scale cortical microcircuit containing two cell types (excitatory and inhibitory) distributed in four layers, and represents the cortical network below a surface of 1 mm\u00b2 (Potjans & Diesmann, 2014).",
- "tags": [
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 2255,
- "tag": "Brian 2"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2579,
- "tag": "ModelDB:244261"
- }
- ],
- "timestamp_created": "2024-01-12 18:37:35.416424+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/244261",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1939": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 1939,
- "name": "Deconstruction of cortical evoked potentials generated by subthalamic DBS (Kumaravelu et al 2018)",
- "repository_type": "github",
- "summary": "\"...\r\nHigh frequency deep brain stimulation (DBS) of the\r\nsubthalamic nucleus (STN) suppresses parkinsonian motor symptoms and\r\nmodulates cortical activity.\r\n\r\n...\r\n\r\nCortical evoked potentials (cEP) generated by STN DBS reflect\r\nthe response of cortex to subcortical stimulation, and the goal was to\r\ndetermine the neural origin of cEP using a two-step approach.\r\n\r\nFirst,\r\nwe recorded cEP over ipsilateral primary motor cortex during different\r\nfrequencies of STN DBS in awake healthy and unilateral 6-OHDA lesioned\r\nparkinsonian rats.\r\n\r\nSecond, we used a biophysically-based model of the\r\nthalamocortical network to deconstruct the neural origin of the\r\ncEP. The in vivo cEP included short (R1), intermediate (R2) and\r\nlong-latency (R3) responses. Model-based cortical responses to\r\nsimulated STN DBS matched remarkably well the in vivo responses.\r\n\r\nR1\r\nwas generated by antidromic activation of layer 5 pyramidal neurons,\r\nwhile recurrent activation of layer 5 pyramidal neurons via excitatory\r\naxon collaterals reproduced R2. R3 was generated by polysynaptic\r\nactivation of layer 2/3 pyramidal neurons via the\r\ncortico-thalamic-cortical pathway.\r\n\r\nAntidromic activation of the\r\nhyperdirect pathway and subsequent intracortical and\r\ncortico-thalamo-cortical synaptic interactions were sufficient to\r\ngenerate cEP by STN DBS, and orthodromic activation through basal\r\nganglia-thalamus-cortex pathways was not required. These results\r\ndemonstrate the utility of cEP to determine the neural elements\r\nactivated by STN DBS that might modulate cortical activity and\r\ncontribute to the suppression of parkinsonian symptoms.\"",
- "tags": [
- {
- "id": 831,
- "tag": "Deep brain stimulation"
- },
- {
- "id": 1546,
- "tag": "Evoked LFP"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 589,
- "tag": "I L high threshold"
- },
- {
- "id": 739,
- "tag": "I Na,p"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 575,
- "tag": "I T low threshold"
- },
- {
- "id": 1433,
- "tag": "I_AHP"
- },
- {
- "id": 747,
- "tag": "I_KD"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2580,
- "tag": "ModelDB:244262"
- },
- {
- "id": 577,
- "tag": "NEURON"
- }
- ],
- "timestamp_created": "2024-01-12 18:37:35.983723+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/244262",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1940": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1940,
- "name": "Excitotoxic loss of dopaminergic cells in PD (Muddapu et al 2019)",
- "repository_type": "github",
- "summary": "\"... A\r\ncouple of the proposed mechanisms, however, show\r\npotential for the\r\ndevelopment of a novel line of PD (Parkinson's disease) therapeutics. One of these\r\nmechanisms is the peculiar metabolic vulnerability of SNc (Substantia Nigra pars compacta) cells\r\ncompared to other dopaminergic clusters; the other is the SubThalamic\r\nNucleus (STN)-induced excitotoxicity in SNc. To investigate the latter\r\nhypothesis computationally, we developed a spiking neuron\r\nnetwork-model of SNc-STN-GPe system. In the model, prolonged\r\nstimulation of SNc cells by an overactive STN leads to an increase in\r\n\u2018stress\u2019 variable; when the stress in a SNc neuron exceeds a stress\r\nthreshold, the neuron dies. The model shows that the interaction\r\nbetween SNc and STN involves a positive-feedback due to which, an\r\ninitial loss of SNc cells that crosses a threshold causes a\r\nrunaway-effect, leading to an inexorable loss of SNc cells, strongly\r\nresembling the process of neurodegeneration. The model further\r\nsuggests a link between the two aforementioned mechanisms of SNc cell\r\nloss. Our simulation results show that the excitotoxic cause of SNc\r\ncell loss might initiate by weak-excitotoxicity mediated by energy\r\ndeficit, followed by strong-excitotoxicity, mediated by a disinhibited\r\nSTN. A variety of conventional therapies were simulated to test their\r\nefficacy in slowing down SNc cell loss. Among them, glutamate\r\ninhibition, dopamine restoration, subthalamotomy and deep brain\r\nstimulation showed superior neuroprotective-effects in the proposed\r\nmodel.\"",
- "tags": [
- {
- "id": 831,
- "tag": "Deep brain stimulation"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2581,
- "tag": "ModelDB:244384"
- },
- {
- "id": 801,
- "tag": "Parkinson's"
- }
- ],
- "timestamp_created": "2024-01-12 18:37:36.505617+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/244384",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1941": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1941,
- "name": "STDP and BDNF in CA1 spines (Solinas et al. 2019)",
- "repository_type": "github",
- "summary": "Storing memory traces in the brain is essential for learning and memory formation. Memory traces are created by joint electrical activity in neurons that are interconnected by synapses and allow transferring electrical activity from a sending (presynaptic) to a receiving (postsynaptic) neuron. During learning, neurons that are co-active can tune synapses to become more effective. This process is called synaptic plasticity or long-term potentiation (LTP). Timing-dependent LTP (t-LTP) is a physiologically relevant type of synaptic plasticity that results from repeated sequential firing of action potentials (APs) in pre- and postsynaptic neurons. T-LTP is observed during learning in vivo and is a cellular correlate of memory formation. T-LTP can be elicited by different rhythms of synaptic activity that recruit distinct synaptic growth processes underlying t-LTP. The protein brain-derived neurotrophic factor (BDNF) is released at synapses and mediates synaptic growth in response to specific rhythms of t-LTP stimulation, while other rhythms mediate BDNF-independent t-LTP. \r\nHere, we developed a realistic computational model that accounts for our previously published experimental results of BDNF-independent 1:1 t-LTP (pairing of 1 presynaptic with 1 postsynaptic AP) and BDNF-dependent 1:4 t-LTP (pairing of 1 presynaptic with 4 postsynaptic APs). The model explains the magnitude and time course of both t-LTP forms and allows predicting t-LTP properties that result from altered BDNF turnover. \r\nSince BDNF levels are decreased in demented patients, understanding the function of BDNF in memory processes is of utmost importance to counteract Alzheimer\u2019s disease.",
- "tags": [
- {
- "id": 723,
- "tag": "Facilitation"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 747,
- "tag": "I_KD"
- },
- {
- "id": 749,
- "tag": "Long-term Synaptic Plasticity"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2582,
- "tag": "ModelDB:244412"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 802,
- "tag": "STDP"
- },
- {
- "id": 724,
- "tag": "Short-term Synaptic Plasticity"
- }
- ],
- "timestamp_created": "2024-01-12 18:37:37.052776+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/244412",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1942": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1942,
- "name": "Voltage and light-sensitive Channelrhodopsin-2 model (ChR2-H134R) (Williams et al. 2013) (NEURON)",
- "repository_type": "github",
- "summary": "\" ... Focusing on one of the most widely used ChR2 mutants (H134R) with enhanced current, we collected a comprehensive experimental data set of the response of this ion channel to different irradiances and voltages, and used these data to develop a model of ChR2 with empirically-derived voltage- and irradiance- dependence, where parameters were fine-tuned via simulated annealing optimization. This ChR2 model offers: 1) accurate inward rectification in the current-voltage response across irradiances; 2) empirically-derived voltage- and light-dependent kinetics (activation, deactivation and recovery from inactivation); and 3) accurate amplitude and morphology of the response across voltage and irradiance settings. Temperature-scaling factors (Q10) were derived and model kinetics was adjusted to physiological temperatures. ... \" ",
- "tags": [
- {
- "id": 1794,
- "tag": "Channelrhodopsin (ChR)"
- },
- {
- "id": 567,
- "tag": "Ion Channel Kinetics"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2583,
- "tag": "ModelDB:244414"
- },
- {
- "id": 577,
- "tag": "NEURON"
- }
- ],
- "timestamp_created": "2024-01-12 18:37:37.638947+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/244414",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1943": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1943,
- "name": "CA1 pyramidal neuron (Combe et al 2018)",
- "repository_type": "github",
- "summary": "\"Gamma oscillations are thought to play a role in learning and memory. Two distinct bands, slow (25-50 Hz) and fast (65-100 Hz) gamma, have been identified in area CA1 of the rodent hippocampus. Slow gamma is phase-locked to activity in area CA3 and presumably driven by the Schaffer collaterals. We used a combination of computational modeling and in vitro electrophysiology in hippocampal slices of male rats to test whether CA1 neurons responded to Schaffer collateral stimulation selectively at slow gamma frequencies, and to identify the mechanisms involved. Both approaches demonstrated that in response to temporally precise input at Schaffer collaterals, CA1 pyramidal neurons fire preferentially in the slow gamma range regardless of whether the input is at fast or slow gamma frequencies, suggesting frequency selectivity in CA1 output with respect to CA3 input. In addition, phase-locking, assessed by the vector strength, was more precise for slow gamma than fast gamma input. ...\"",
- "tags": [
- {
- "id": 1799,
- "tag": "Gamma oscillations"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 589,
- "tag": "I L high threshold"
- },
- {
- "id": 580,
- "tag": "I M"
- },
- {
- "id": 739,
- "tag": "I Na,p"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 575,
- "tag": "I T low threshold"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2584,
- "tag": "ModelDB:244416"
- },
- {
- "id": 577,
- "tag": "NEURON"
- }
- ],
- "timestamp_created": "2024-01-12 18:37:38.555233+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/244416",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1944": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1944,
- "name": "Human sleep-wake regulatory network model (Gleit et al 2013, Booth et al 2017)",
- "repository_type": "github",
- "summary": "A physiologically-based mathematical model of a sleep-wake regulatory network model for human sleep. The model simulates neurotransmitter-mediated interactions among hypothalamic and brainstem neuronal populations that promote wake, rapid eye movement (REM) sleep and non-REM (NREM) sleep. A neuronal population firing rate model formalism is used. The circadian rhythm pacemaker neuronal population, the suprachiasmatic nucleus (SCN), modulates activity in the wake- and sleep-promoting populations to entrain sleep-wake behavior to the ~24h circadian rhythm. A circadian clock oscillator model drives a 24h variation in the SCN firing rate and can be entrained to an externally imposed light:dark cycle. The default parameters replicate typical human sleep entrained to an external 14h:10h light:dark cycle",
- "tags": [
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2585,
- "tag": "ModelDB:244485"
- },
- {
- "id": 592,
- "tag": "Sleep"
- }
- ],
- "timestamp_created": "2024-01-12 18:37:39.301002+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/244485",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1945": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1945,
- "name": "Determinants of the intracellular and extracellular waveforms in DA neurons (Lopez-Jury et al 2018)",
- "repository_type": "github",
- "summary": "To systematically address the contribution of AIS, dendritic and somatic compartments to shaping the two-component action potentials (APs), we modeled APs of male mouse and rat dopaminergic neurons. A parsimonious two-domain model, with high (AIS) and lower (dendro-somatic) Na+ conductance, reproduced the notch in the temporal derivatives, but not in the extracellular APs, regardless of morphology. The notch was only revealed when somatic active currents were reduced, constraining the model to three domains. Thus, an initial AIS spike is followed by an actively generated spike by the axon-bearing dendrite (ABD), in turn followed mostly passively by the soma. Larger AISs and thinner ABD (but not soma-to-AIS distance) accentuate the AIS component.",
- "tags": [
- {
- "id": 727,
- "tag": "Action Potential Initiation"
- },
- {
- "id": 734,
- "tag": "Extracellular Fields"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 589,
- "tag": "I L high threshold"
- },
- {
- "id": 721,
- "tag": "I N"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 575,
- "tag": "I T low threshold"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2586,
- "tag": "ModelDB:244599"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 740,
- "tag": "Na/K pump"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 2236,
- "tag": "Pacemaking mechanism"
- },
- {
- "id": 720,
- "tag": "Temporal Pattern Generation"
- }
- ],
- "timestamp_created": "2024-01-12 18:37:39.913422+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/244599",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1946": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1946,
- "name": "Cerebellum Purkinje cell: dendritic ion channels activated by climbing fibre (Ait Ouares et al 2019)",
- "repository_type": "github",
- "summary": "\"In cerebellar Purkinje neuron (PN) dendrites, the transient\r\ndepolarisation associated with a climbing fibre (CF) EPSP\r\nactivates voltage-gated Ca2+ channels (VGCCs), voltage-gated K+\r\nchannels (VGKCs) and Ca2+ activated SK and BK K+ channels. The\r\nresulting membrane potential (Vm) and Ca2+ transients play a\r\nfundamental role in dendritic integration and synaptic plasticity\r\nof parallel fibre inputs. Here we report a detailed investigation\r\nof the kinetics of dendritic Ca2+ and K+ channels activated by\r\nCF-EPSPs, based on optical measurements of Vm and Ca2+ transients\r\nand on a single-compartment NEURON model reproducing experimental\r\ndata.\r\n... \"",
- "tags": [
- {
- "id": 579,
- "tag": "Active Dendrites"
- },
- {
- "id": 572,
- "tag": "Calcium dynamics"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2587,
- "tag": "ModelDB:244679"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 569,
- "tag": "Simplified Models"
- }
- ],
- "timestamp_created": "2024-01-12 18:37:40.438870+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/244679",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1947": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1947,
- "name": "Optimal Localist and Distributed Coding Through STDP (Masquelier & Kheradpisheh 2018)",
- "repository_type": "github",
- "summary": "We show how a LIF neuron equipped with STDP can become optimally selective, in an unsupervised manner, to one or several repeating spike patterns, even when those patterns are hidden in Poisson spike trains.",
- "tags": [
- {
- "id": 595,
- "tag": "Coincidence Detection"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2588,
- "tag": "ModelDB:244684"
- },
- {
- "id": 725,
- "tag": "Synaptic Plasticity"
- },
- {
- "id": 803,
- "tag": "Unsupervised Learning"
- }
- ],
- "timestamp_created": "2024-01-12 18:37:41.040883+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/244684",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1948": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1948,
- "name": "Coincident signals in Olfactory Bulb Granule Cell spines (Aghvami et al 2019)",
- "repository_type": "github",
- "summary": "\"In the mammalian olfactory bulb, the inhibitory axonless granule cells (GCs) feature reciprocal synapses that interconnect them with the principal neurons of the bulb, mitral, and tufted cells. These synapses are located within large excitable spines that can generate local action potentials (APs) upon synaptic input (\u201cspine spike\u201d). Moreover, GCs can fire global APs that propagate throughout the dendrite. Strikingly, local postsynaptic Ca2+ entry summates mostly linearly with Ca2+ entry due to coincident global APs generated by glomerular stimulation, although some underlying conductances should be inactivated. We investigated this phenomenon by constructing a compartmental GC model to simulate the pairing of local and global signals as a function of their temporal separation ?t. These simulations yield strongly sublinear summation of spine Ca2+ entry for the case of perfect coincidence ?t = 0 ms. ...\"",
- "tags": [
- {
- "id": 579,
- "tag": "Active Dendrites"
- },
- {
- "id": 1684,
- "tag": "Ca pump"
- },
- {
- "id": 572,
- "tag": "Calcium dynamics"
- },
- {
- "id": 595,
- "tag": "Coincidence Detection"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2589,
- "tag": "ModelDB:244687"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 620,
- "tag": "Python"
- }
- ],
- "timestamp_created": "2024-01-12 18:37:41.655387+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/244687",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1951": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1951,
- "name": "Channel density variability among CA1 neurons (Migliore et al. 2018)",
- "repository_type": "github",
- "summary": "The peak conductance of many ion channel types measured in any given animal is highly variable across neurons, both within and between neuronal populations. The current view is that this occurs because a neuron needs to adapt its intrinsic electrophysiological properties either to maintain the same operative range in the presence of abnormal inputs or to compensate for the effects of pathological conditions. Limited experimental and modeling evidence suggests this might be implemented via the correlation and/or degeneracy in the function of multiple types of conductances. To study this mechanism in hippocampal CA1 neurons and interneurons, we systematically generated a set of morphologically and biophysically accurate models. We then analyzed the ensembles of peak conductance obtained for each model neuron. The results suggest that the set of conductances expressed in the various neuron types may be divided into two groups: one group is responsible for the major characteristics of the firing behavior in each population and the other more involved with degeneracy. These models provide experimentally testable predictions on the combination and relative proportion of the different conductance types that should be present in hippocampal CA1 pyramidal cells and interneurons.",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 2592,
- "tag": "BluePyOpt"
- },
- {
- "id": 1684,
- "tag": "Ca pump"
- },
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 731,
- "tag": "I CAN"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 589,
- "tag": "I L high threshold"
- },
- {
- "id": 580,
- "tag": "I M"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 575,
- "tag": "I T low threshold"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 747,
- "tag": "I_KD"
- },
- {
- "id": 756,
- "tag": "Methods"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2593,
- "tag": "ModelDB:244688"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 568,
- "tag": "Parameter Fitting"
- }
- ],
- "timestamp_created": "2024-01-12 18:41:02.107374+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/244688",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1952": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1952,
- "name": "Long term potentiation, LTP, protein synthesis, proteasome (Smolen et al. 2018)",
- "repository_type": "github",
- "summary": "The transition from early long-term potentiation (E-LTP) to late LTP (L-LTP) involves protein synthesis and degradation. L-LTP is blocked by inhibiting either protein synthesis or proteasome-dependent degradation prior to and during a tetanic stimulus, but paradoxically, L-LTP is not blocked when synthesis and degradation are inhibited simultaneously, suggesting counter-acting positive and negative proteins regulate L-LTP. To investigate this paradox, we modeled LTP at the Schaffer collateral synapse. Nine differential equations describe the levels of positive and negative regulator proteins (PP and NP) and transitions among five discrete synaptic states, a basal state (BAS), three E-LTP states (EP1, EP2, ED), and a L-LTP state (LP). A stimulus initiates the transition from BAS to EP1 and from EP1 to EP2, initiates the synthesis of PP and NP, and activates the ubiquitin-proteasome system (UPS). UPS mediates transitions of EP1 and EP2 to ED and the degradation of NP. The conversion of E-LTP to L-LTP is mediated by a PP-dependent transition from ED to LP. NP mediates reversal of EP2 to BAS. This model simulates empirical observations: 1) normal L-LTP, 2) block by either proteasome inhibitor or protein synthesis inhibitor alone, and 3) preservation of L-LTP when both inhibitors are applied together. Elements of this abstract model can be correlated with specific molecules and processes. Moreover, the model makes testable predictions, such as a unique synaptic state ED that precedes the transition to L-LTP, and a time window for the action of the UPS (during the transitions from EP1 and EP2 to ED). Tests of these predictions will provide insights into the processes of long-term synaptic plasticity.",
- "tags": [
- {
- "id": 749,
- "tag": "Long-term Synaptic Plasticity"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2594,
- "tag": "ModelDB:244690"
- },
- {
- "id": 751,
- "tag": "Signaling pathways"
- },
- {
- "id": 569,
- "tag": "Simplified Models"
- }
- ],
- "timestamp_created": "2024-01-12 18:41:02.675159+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/244690",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1953": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1953,
- "name": "Gap junction subtypes (Appukuttan et al 2016)",
- "repository_type": "github",
- "summary": "Computational models of various gap junction sub-types including accommodating differences in their unitary conductances, voltage sensitivity and gating kinetics.",
- "tags": [
- {
- "id": 756,
- "tag": "Methods"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2595,
- "tag": "ModelDB:244692"
- },
- {
- "id": 577,
- "tag": "NEURON"
- }
- ],
- "timestamp_created": "2024-01-12 18:41:03.191817+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/244692",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1954": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1954,
- "name": "Response to correlated synaptic input for HH/IF point neuron vs with dendrite (G\u00f3rski et al 2018)",
- "repository_type": "github",
- "summary": "\" ... Here, we study computational models of neurons to investigate the functional effects of dendritic spikes. In agreement with previous studies, we found that point neurons or neurons with passive dendrites increase their somatic firing rate in response to the correlation of synaptic bombardment for a wide range of input conditions, i.e. input firing rates, synaptic conductances, or refractory periods. However, neurons with active dendrites show the opposite behavior: for a wide range of conditions the firing rate decreases as a function of correlation. We found this property in three types of models of dendritic excitability: a Hodgkin-Huxley model of dendritic spikes, a model with integrate and fire dendrites, and a discrete-state dendritic model. We conclude that fast dendritic spikes confer much broader computational properties to neurons, sometimes opposite to that of point neurons.\"",
- "tags": [
- {
- "id": 2255,
- "tag": "Brian 2"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 570,
- "tag": "Influence of Dendritic Geometry"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2596,
- "tag": "ModelDB:244700"
- },
- {
- "id": 596,
- "tag": "Synaptic Integration"
- }
- ],
- "timestamp_created": "2024-01-12 18:41:03.706293+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/244700",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1955": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1955,
- "name": "Active dendrites shape signaling microdomains in hippocampal neurons (Basak & Narayanan 2018)",
- "repository_type": "github",
- "summary": "The spatiotemporal spread of biochemical signals in neurons and other cells regulate signaling specificity, tuning of signal propagation, along with specificity and clustering of adaptive plasticity. Theoretical and experimental studies have demonstrated a critical role for cellular morphology and the topology of signaling networks in regulating this spread. In this study, we add a significantly complex dimension to this narrative by demonstrating that voltage-gated ion channels (A-type Potassium channels and T-type Calcium channels) on the plasma membrane could actively amplify or suppress the strength and spread of downstream signaling components. We employed a multiscale, multicompartmental, morphologically realistic, conductance-based model that accounted for the biophysics of electrical signaling and the biochemistry of calcium handling and downstream enzymatic signaling in a hippocampal pyramidal neuron. We chose the calcium \u2013 calmodulin \u2013 calcium/calmodulin-dependent protein kinase II (CaMKII) \u2013 protein phosphatase 1 (PP1) signaling pathway owing to its critical importance to several forms of neuronal plasticity, and employed physiologically relevant theta-burst stimulation (TBS) or theta-burst pairing (TBP) protocol to initiate a calcium microdomain through NMDAR activation at a synapse.",
- "tags": [
- {
- "id": 579,
- "tag": "Active Dendrites"
- },
- {
- "id": 1684,
- "tag": "Ca pump"
- },
- {
- "id": 572,
- "tag": "Calcium dynamics"
- },
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 861,
- "tag": "I_K,Na"
- },
- {
- "id": 818,
- "tag": "I_SERCA"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2597,
- "tag": "ModelDB:244848"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 1919,
- "tag": "Reaction-diffusion"
- },
- {
- "id": 751,
- "tag": "Signaling pathways"
- },
- {
- "id": 725,
- "tag": "Synaptic Plasticity"
- }
- ],
- "timestamp_created": "2024-01-12 18:41:04.279707+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/244848",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "1956": {
- "auto_sync": true,
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- "modeling"
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- "id": 1956,
- "name": "Conductance based model for short term plasticity at CA3-CA1 synapses (Mukunda & Narayanan 2017)",
- "repository_type": "github",
- "summary": "We develop a new biophysically rooted, physiologically constrained conductance-based synaptic model to mechanistically account for short-term facilitation and depression, respectively through residual calcium and transmitter depletion kinetics. The model exhibits different synaptic filtering profiles upon changing certain parameters in the base model. We show degenercy in achieving similar plasticity profiles with different presynaptic parameters. Finally, by virtually knocking out certain conductances, we show the differential contribution of conductances.",
- "tags": [
- {
- "id": 572,
- "tag": "Calcium dynamics"
- },
- {
- "id": 1606,
- "tag": "Conductance distributions"
- },
- {
- "id": 731,
- "tag": "I CAN"
- },
- {
- "id": 576,
- "tag": "I K"
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- "id": 594,
- "tag": "I h"
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- {
- "id": 564,
- "tag": "ModelDB"
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- "id": 2598,
- "tag": "ModelDB:244922"
- },
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- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 2599,
- "tag": "Neurotransmitter dynamics"
- },
- {
- "id": 724,
- "tag": "Short-term Synaptic Plasticity"
- }
- ],
- "timestamp_created": "2024-01-12 18:41:04.804710+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/244922",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "1957": {
- "auto_sync": true,
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- "modeling"
- ],
- "default_context": "master",
- "id": 1957,
- "name": "Acetylcholine-modulated plasticity in reward-driven navigation (Zannone et al 2018)",
- "repository_type": "github",
- "summary": "\"Neuromodulation plays a fundamental role in the acquisition of new behaviours. In previous\r\nexperimental work, we showed that acetylcholine biases hippocampal synaptic plasticity towards\r\ndepression, and the subsequent application of dopamine can retroactively convert depression into\r\npotentiation. We also demonstrated that incorporating this sequentially neuromodulated Spike-\r\nTiming-Dependent Plasticity (STDP) rule in a network model of navigation yields effective learning\r\nof changing reward locations. Here, we employ computational modelling to further characterize the\r\neffects of cholinergic depression on behaviour. We find that acetylcholine, by allowing learning from\r\nnegative outcomes, enhances exploration over the action space. We show that this results in a variety\r\nof effects, depending on the structure of the model, the environment and the task. Interestingly,\r\nsequentially neuromodulated STDP also yields flexible learning, surpassing the performance of other\r\nreward-modulated plasticity rules.\"",
- "tags": [
- {
- "id": 808,
- "tag": "Hebbian plasticity"
- },
- {
- "id": 825,
- "tag": "Learning"
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- {
- "id": 655,
- "tag": "MATLAB"
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- {
- "id": 564,
- "tag": "ModelDB"
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- {
- "id": 2600,
- "tag": "ModelDB:245018"
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- {
- "id": 859,
- "tag": "Reward-modulated STDP"
- },
- {
- "id": 802,
- "tag": "STDP"
- },
- {
- "id": 800,
- "tag": "Spatial Navigation"
- },
- {
- "id": 725,
- "tag": "Synaptic Plasticity"
- }
- ],
- "timestamp_created": "2024-01-12 18:41:05.340843+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/245018",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "auto_sync": true,
- "content_types": "modeling",
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- "modeling"
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- "default_context": "master",
- "id": 1958,
- "name": "Hippocampal CA1 pyramidal cell demonstrating dynamic mode switching (Berteau & Bullock 2020)",
- "repository_type": "github",
- "summary": "A simulated proposed single-cell mechanism for CA1\u2019s behavior as an associative mismatch detector. Shifts in spiking mode (accomplished via KCNQ interaction with chloride leak currents) signal matches vs. mismatches.",
- "tags": [
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 566,
- "tag": "Bursting"
- },
- {
- "id": 595,
- "tag": "Coincidence Detection"
- },
- {
- "id": 1531,
- "tag": "I Cl, leak"
- },
- {
- "id": 580,
- "tag": "I M"
- },
- {
- "id": 2162,
- "tag": "I Na, slow inactivation"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2601,
- "tag": "ModelDB:245071"
- },
- {
- "id": 620,
- "tag": "Python"
- },
- {
- "id": 791,
- "tag": "Rate-coding model neurons"
- }
- ],
- "timestamp_created": "2024-01-12 18:41:05.863850+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/245071",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1959": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1959,
- "name": "Hebbian STDP for modelling the emergence of disparity selectivity (Chauhan et al 2018)",
- "repository_type": "github",
- "summary": "This code shows how Hebbian learning mediated by STDP mechanisms could explain the emergence of disparity selectivity in the early visual system. This upload is a snapshot of the code at the time of acceptance of the paper. For a link to a soon-to-come git repository, consult the author's website: www.tusharchauhan.com/research/ .\r\n\r\n\r\nThe datasets used in the paper are not provided due to size, but download links and expected directory-structures are. The user can (and is strongly encouraged to) experiment with their own dataset. Let me know if you find something interesting!\r\n\r\n\r\nFinally, I am very keen on a redesign/restructure/adaptation of the code to more applied problems in AI and robotics (or any other field where a spiking non-linear approach makes sense). If you have a serious proposal, don't hesitate to contact me [research AT tusharchauhan DOT com ]. \r\n",
- "tags": [
- {
- "id": 808,
- "tag": "Hebbian plasticity"
- },
- {
- "id": 655,
- "tag": "MATLAB"
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- "id": 564,
- "tag": "ModelDB"
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- {
- "id": 2602,
- "tag": "ModelDB:245409"
- },
- {
- "id": 802,
- "tag": "STDP"
- },
- {
- "id": 725,
- "tag": "Synaptic Plasticity"
- },
- {
- "id": 726,
- "tag": "Vision"
- }
- ],
- "timestamp_created": "2024-01-12 18:41:06.382422+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/245409",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "1960": {
- "auto_sync": true,
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- "default_context": "master",
- "id": 1960,
- "name": "Striatal Spiny Projection Neuron, inhibition enhances spatial specificity (Dorman et al 2018)",
- "repository_type": "github",
- "summary": "We use a computational model of a striatal spiny projection neuron to investigate dendritic spine calcium dynamics in response to spatiotemporal patterns of synaptic inputs. We show that spine calcium elevation is stimulus-specific, with supralinear calcium elevation in cooperatively stimulated spines. Intermediate calcium elevation occurs in neighboring non-stimulated dendritic spines, predicting heterosynaptic effects. Inhibitory synaptic inputs enhance the difference between peak calcium in stimulated spines, and peak calcium in non-stimulated spines, thereby enhancing stimulus specificity.",
- "tags": [
- {
- "id": 1684,
- "tag": "Ca pump"
- },
- {
- "id": 572,
- "tag": "Calcium dynamics"
- },
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 600,
- "tag": "GENESIS"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 730,
- "tag": "I A, slow"
- },
- {
- "id": 731,
- "tag": "I CAN"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 842,
- "tag": "I Krp"
- },
- {
- "id": 589,
- "tag": "I L high threshold"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 844,
- "tag": "I R"
- },
- {
- "id": 575,
- "tag": "I T low threshold"
- },
- {
- "id": 2318,
- "tag": "IK Bkca"
- },
- {
- "id": 2319,
- "tag": "IK Skca"
- },
- {
- "id": 1931,
- "tag": "Kir"
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- {
- "id": 564,
- "tag": "ModelDB"
- },
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- "id": 2603,
- "tag": "ModelDB:245411"
- },
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- "id": 738,
- "tag": "Na/Ca exchanger"
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- {
- "id": 596,
- "tag": "Synaptic Integration"
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- {
- "id": 725,
- "tag": "Synaptic Plasticity"
- }
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- "timestamp_created": "2024-01-12 18:41:07.134084+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/245411",
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- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
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- "content_types_list": [
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- ],
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- "id": 1961,
- "name": "Ca2+ requirements for Long-Term Depression in Purkinje Cells (Criseida Zamora et al 2018)",
- "repository_type": "github",
- "summary": "An updated stochastic model of cerebellar Long-Term Depression (LTD) to study the requirements of calcium to induce LTD. Calcium signal is generated as a train of calcium pulses and this can be modulated by its amplitude, frequency, width and number of pulses.\r\nCaMKII activation and its regulatory pathway are added to an earlier published model to study the sensitivity to calcium frequency. The model is useful to investigate systematically the dependence of LTD induction on calcium stimuli parameters.",
- "tags": [
- {
- "id": 749,
- "tag": "Long-term Synaptic Plasticity"
- },
- {
- "id": 564,
- "tag": "ModelDB"
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- {
- "id": 2604,
- "tag": "ModelDB:245412"
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- "id": 1574,
- "tag": "STEPS"
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- {
- "id": 751,
- "tag": "Signaling pathways"
- },
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- "id": 1576,
- "tag": "Stochastic simulation"
- },
- {
- "id": 725,
- "tag": "Synaptic Plasticity"
- }
- ],
- "timestamp_created": "2024-01-12 18:41:07.793498+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/245412",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
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- ],
- "default_context": "master",
- "id": 1962,
- "name": "Escape response latency in the Giant Fiber System of Drosophila melanogastor (Augustin et al 2019)",
- "repository_type": "github",
- "summary": "\"The Giant Fiber System (GFS) is a multi-component neuronal pathway mediating rapid escape response in the adult fruit-fly Drosophila melanogaster, usually in the face of a threatening visual stimulus. Two branches of the circuit promote the response by stimulating an escape jump followed by flight initiation. Our recent work demonstrated an age-associated decline in the speed of signal propagation through the circuit, measured as the stimulus-to-muscle depolarization response latency. The decline is likely due to the diminishing number of inter-neuronal gap junctions in the GFS of ageing flies. In this work, we presented a realistic conductance-based, computational model of the GFS that recapitulates our experimental results and identifies some of the critical anatomical and physiological components governing the circuit's response latency. According to our model, anatomical properties of the GFS neurons have a stronger impact on the transmission than neuronal membrane conductance densities. The model provides testable predictions for the effect of experimental interventions on the circuit's performance in young and ageing flies.\"",
- "tags": [
- {
- "id": 754,
- "tag": "Delay"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 739,
- "tag": "I Na,p"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 729,
- "tag": "Invertebrate"
- },
- {
- "id": 564,
- "tag": "ModelDB"
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- {
- "id": 2605,
- "tag": "ModelDB:245415"
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- {
- "id": 577,
- "tag": "NEURON"
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- ],
- "timestamp_created": "2024-01-12 18:41:08.429728+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/245415",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "auto_sync": true,
- "content_types": "modeling",
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- "id": 1963,
- "name": "Hippocampal Mossy Fiber bouton: presynaptic KV7 channel function (Martinello et al 2019)",
- "repository_type": "github",
- "summary": "Hippocampal Mossy Fiber bouton: presynaptic KV7 channel function (Martinello et al 2019)",
- "tags": [
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- "id": 736,
- "tag": "Action Potentials"
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- {
- "id": 590,
- "tag": "I A"
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- {
- "id": 731,
- "tag": "I CAN"
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- {
- "id": 576,
- "tag": "I K"
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- {
- "id": 591,
- "tag": "I K,leak"
- },
- {
- "id": 580,
- "tag": "I M"
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- {
- "id": 574,
- "tag": "I Na,t"
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- {
- "id": 564,
- "tag": "ModelDB"
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- {
- "id": 2606,
- "tag": "ModelDB:245417"
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- "id": 577,
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- "timestamp_created": "2024-01-12 18:41:09.121457+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/245417",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "auto_sync": true,
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- ],
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- "id": 1964,
- "name": "Function and energy constrain neuronal biophysics in coincidence detection (Remme et al 2018)",
- "repository_type": "github",
- "summary": "\" ... We use models of conductance-based neurons constrained by experimentally observed characteristics with parameters varied within a physiologically realistic range. Our study shows that neuronal design of MSO cells does not compromise on function, but favors energetically less costly cell properties where possible without interfering with function.\"",
- "tags": [
- {
- "id": 755,
- "tag": "C or Cplusplus program"
- },
- {
- "id": 595,
- "tag": "Coincidence Detection"
- },
- {
- "id": 591,
- "tag": "I K,leak"
- },
- {
- "id": 1532,
- "tag": "I Na, leak"
- },
- {
- "id": 770,
- "tag": "I_KLT"
- },
- {
- "id": 570,
- "tag": "Influence of Dendritic Geometry"
- },
- {
- "id": 655,
- "tag": "MATLAB"
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- {
- "id": 2122,
- "tag": "Membrane Properties"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2607,
- "tag": "ModelDB:245424"
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- {
- "id": 821,
- "tag": "Sensory coding"
- },
- {
- "id": 596,
- "tag": "Synaptic Integration"
- }
- ],
- "timestamp_created": "2024-01-12 18:41:09.721837+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/245424",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
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- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "modeling"
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- "default_context": "master",
- "id": 1965,
- "name": "Dopaminergic subtantia nigra neuron (Moubarak et al 2019)",
- "repository_type": "github",
- "summary": "Axon initial segment (AIS) geometry critically influences neuronal excitability. Interestingly, the axon of substantia nigra pars compacta (SNc) dopaminergic (DA) neurons displays a highly variable location and most often arises from an axon-bearing dendrite (ABD). We combined current-clamp somatic and dendritic recordings, outside-out recordings of dendritic sodium and potassium currents, morphological reconstructions and multi-compartment modelling to determine cell-to-cell variations in AIS and ABD geometry and their influence on neuronal output (spontaneous pacemaking frequency, AP shape). Both AIS and ABD geometries are highly variable between SNc DA neurons. Surprisingly, we found that AP shape and pacemaking frequency were independent of AIS geometry. Modelling realistic morphological and biophysical variations clarify this result: in SNc DA neurons, the complexity of the ABD combined with its excitability predominantly define pacemaking frequency and AP shape, such that large variations in AIS geometry negligibly affect neuronal output, and are tolerated.",
- "tags": [
- {
- "id": 727,
- "tag": "Action Potential Initiation"
- },
- {
- "id": 1684,
- "tag": "Ca pump"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 594,
- "tag": "I h"
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- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2608,
- "tag": "ModelDB:245427"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 2236,
- "tag": "Pacemaking mechanism"
- }
- ],
- "timestamp_created": "2024-01-12 18:41:10.264624+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/245427",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- ],
- "default_context": "master",
- "id": 1966,
- "name": "Honey bee receptor and antennal lobe model (Chan et al 2018)",
- "repository_type": "github",
- "summary": "This model consists of the full repertoire of honey bees' receptors and glomeruli. It fits to the statistics of data from Galizia et al (1999) and Gremiaux et al (2012). Parameters can be changed to (statistically) fit to other data sets.",
- "tags": [
- {
- "id": 755,
- "tag": "C or Cplusplus program"
- },
- {
- "id": 564,
- "tag": "ModelDB"
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- "id": 2609,
- "tag": "ModelDB:245445"
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- "id": 588,
- "tag": "Olfaction"
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- "timestamp_created": "2024-01-12 18:41:10.932263+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/245445",
- "user": {
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- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
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- "username": "osbadmin"
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- "id": 1967,
- "name": "Compartmental differences in cAMP signaling pathways in hippocam. CA1 pyr. cells (Luczak et al 2017)",
- "repository_type": "github",
- "summary": "Model of cAMP signaling pathways in hippocampal CA1 pyramidal neurons investigate mechanisms underlying the experimentally observed difference in cAMP and PKA FRET between proximal and distal dendrites. Simulations show that compartmental difference in PKA activity required enrichment of protein phosphatase in small compartments; neither reduced PKA subunits nor increased PKA substrates were sufficient.",
- "tags": [
- {
- "id": 781,
- "tag": "G-protein coupled"
- },
- {
- "id": 570,
- "tag": "Influence of Dendritic Geometry"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2610,
- "tag": "ModelDB:245529"
- },
- {
- "id": 1919,
- "tag": "Reaction-diffusion"
- }
- ],
- "timestamp_created": "2024-01-12 18:41:11.511372+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/245529",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "1968": {
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- "id": 1968,
- "name": "Parameter optimization using CMA-ES (Jedrzejewski-Szmek et al 2018)",
- "repository_type": "github",
- "summary": "\"Computational models in neuroscience can be used to predict causal\r\nrelationships between biological mechanisms in neurons and networks,\r\nsuch as the effect of blocking an ion channel or synaptic connection\r\non neuron activity. Since developing a biophysically realistic, single\r\nneuron model is exceedingly difficult, software has been developed for\r\nautomatically adjusting parameters of computational neuronal\r\nmodels. The ideal optimization software should work with commonly used\r\nneural simulation software; thus, we present software which works with\r\nmodels specified in declarative format for the MOOSE\r\nsimulator. Experimental data can be specified using one of two\r\ndifferent file formats. The fitness function is customizable as a\r\nweighted combination of feature differences. The optimization itself\r\nuses the covariance matrix adaptation-evolutionary strategy, because\r\nit is robust in the face of local fluctuations of the fitness\r\nfunction, and deals well with a high-dimensional and discontinuous\r\nfitness landscape. We demonstrate the versatility of the software by\r\ncreating several model examples of each of four types of neurons (two\r\nsubtypes of spiny projection neurons and two subtypes of globus\r\npallidus neurons) by tuning to current clamp data.\r\n...\"",
- "tags": [
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 1838,
- "tag": "MOOSE/PyMOOSE"
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- "id": 756,
- "tag": "Methods"
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- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2611,
- "tag": "ModelDB:245563"
- },
- {
- "id": 568,
- "tag": "Parameter Fitting"
- }
- ],
- "timestamp_created": "2024-01-12 18:41:12.006121+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/245563",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "1969": {
- "auto_sync": true,
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- "modeling"
- ],
- "default_context": "main",
- "id": 1969,
- "name": "Dendritic spikes enhance stimulus selectivity in cortical neurons in vivo (Smith et al 2013)",
- "repository_type": "github",
- "summary": "\"Neuronal dendrites are electrically excitable: they can generate regenerative events such as dendritic spikes in response to sufficiently strong synaptic input. Although such events have been observed in many neuronal types, it is not well understood how active dendrites contribute to the tuning of neuronal output in vivo. Here we show that dendritic spikes increase the selectivity of neuronal responses to the orientation of a visual stimulus (orientation tuning). ...\".",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 579,
- "tag": "Active Dendrites"
- },
- {
- "id": 565,
- "tag": "Dendritic Action Potentials"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2612,
- "tag": "ModelDB:245805"
- },
- {
- "id": 743,
- "tag": "NEURON (web link to model)"
- },
- {
- "id": 1569,
- "tag": "Orientation selectivity"
- },
- {
- "id": 758,
- "tag": "Sensory processing"
- },
- {
- "id": 726,
- "tag": "Vision"
- }
- ],
- "timestamp_created": "2024-01-12 18:41:12.508152+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/245805",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1970": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1970,
- "name": "A Computational Model for the Binocular Vector Disparity Estimation (Chessa & Solari 2018)",
- "repository_type": "github",
- "summary": "A biologically-inspired model of disparity estimation: we consider the disparity patterns that arise when artificial and living beings fixate objects in the surrounding environment, in these situations the disparity is a vector quantity (i.e. vertical and horizontal disparities).",
- "tags": [
- {
- "id": 2613,
- "tag": "Disparity estimation"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2614,
- "tag": "ModelDB:245818"
- },
- {
- "id": 726,
- "tag": "Vision"
- }
- ],
- "timestamp_created": "2024-01-12 18:41:13.020339+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/245818",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1971": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1971,
- "name": "Plasticity forms non-overlapping adjacent ON and OFF RFs in cortical neurons (Sollini et al 2018)",
- "repository_type": "github",
- "summary": "Hebbian plasticity of a feedforward network modelling ON-OFF receptive field changes in auditory cortex.",
- "tags": [
- {
- "id": 762,
- "tag": "Audition"
- },
- {
- "id": 860,
- "tag": "Direction Selectivity"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2615,
- "tag": "ModelDB:245879"
- }
- ],
- "timestamp_created": "2024-01-12 18:41:13.528619+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/245879",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1972": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1972,
- "name": "Conductance-based model of rodent thoracic sympathetic postganglionic neuron (McKinnon et al 2019)",
- "repository_type": "github",
- "summary": "\"Thoracic sympathetic postganglionic neurons (tSPNs) represent the final neural output for control of vasomotor and thermoregulatory function. We used whole-cell recordings and computational modeling to provide broad insight on intrinsic cellular mechanisms controlling excitability and capacity for synaptic integration. Compared to past intracellular recordings using microelectrode impalement, we observed dramatically higher membrane resistivity with primacy in controlling enhanced tSPN excitability and recruitment via synaptic integration. Compared to reported phasic firing, all tSPNs fire repetitively and linearly encode injected current magnitude to firing frequency over a broad range. Modeling studies suggest microelectrode impalement injury accounts for differences in tSPN properties previously observed. Overall, intrinsic tSPN excitability plays a much greater role in the integration and maintenance of sympathetic output than previously thought.\"",
- "tags": [
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 589,
- "tag": "I L high threshold"
- },
- {
- "id": 580,
- "tag": "I M"
- },
- {
- "id": 1532,
- "tag": "I Na, leak"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2616,
- "tag": "ModelDB:245926"
- },
- {
- "id": 620,
- "tag": "Python"
- }
- ],
- "timestamp_created": "2024-01-12 18:41:14.051831+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/245926",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1973": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1973,
- "name": "Modelling gain modulation in stability-optimised circuits (Stroud et al 2018)",
- "repository_type": "github",
- "summary": "We supply Matlab code to create 'stability-optimised circuits'. These networks can give rise to rich neural activity transients that resemble primary motor cortex recordings in monkeys during reaching. We also supply code that allows one to learn new network outputs by changing the input-output gain of neurons in a stability-optimised network. Our code recreates the main results of Figure 1 in our related publication.",
- "tags": [
- {
- "id": 825,
- "tag": "Learning"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2617,
- "tag": "ModelDB:246004"
- }
- ],
- "timestamp_created": "2024-01-12 18:41:14.558401+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/246004",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1974": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1974,
- "name": "Human auditory periphery model: cochlea, IHC-AN, auditory brainstem responses (Verhulst et al 2018)",
- "repository_type": "github",
- "summary": "The human auditory periphery model can simulate single-unit response of basilar-membrane vibration, IHC receptor potential, instantaneous AN/CN/IC firing rates, as well as population responses such as otoacoustic emissions, auditory brainstem responses. The neuron models (IHC, AN,CN,IC) can be run independently to relate their responses to electrophysiology, or be simulated as part of the human auditory periphery.",
- "tags": [
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2618,
- "tag": "ModelDB:246535"
- },
- {
- "id": 620,
- "tag": "Python"
- }
- ],
- "timestamp_created": "2024-01-12 18:41:15.057542+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/246535",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1975": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1975,
- "name": "CA1 network model for place cell dynamics (Turi et al 2019)",
- "repository_type": "github",
- "summary": "Biophysical model of CA1 hippocampal region. The model simulates place cells/fields and explores the place cell dynamics as function of VIP+ interneurons.",
- "tags": [
- {
- "id": 645,
- "tag": "Brian"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 591,
- "tag": "I K,leak"
- },
- {
- "id": 580,
- "tag": "I M"
- },
- {
- "id": 1532,
- "tag": "I Na, leak"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2619,
- "tag": "ModelDB:246546"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 799,
- "tag": "Place cell/field"
- }
- ],
- "timestamp_created": "2024-01-12 18:41:15.560190+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/246546",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "1976": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 1976,
- "name": "PyPNS: Multiscale Simulation of a Peripheral Nerve in Python (Lubba et al 2018)",
- "repository_type": "github",
- "summary": "\" ... To reduce experimentation load and allow for a faster, more detailed analysis of peripheral nerve stimulation and recording, computational models incorporating experimental insights will be of great help. We present a peripheral nerve simulator that combines biophysical axon models and numerically solved and idealised extracellular space models in one environment. We modelled the extracellular space as a three-dimensional resistive continuum governed by the electro-quasistatic approximation of the Maxwell equations. ...\"",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 469,
- "tag": "Epilepsy"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2620,
- "tag": "ModelDB:246837"
- },
- {
- "id": 743,
- "tag": "NEURON (web link to model)"
- },
- {
- "id": 853,
- "tag": "Python (web link to model)"
- }
- ],
- "timestamp_created": "2024-01-12 18:41:16.259591+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/246837",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "1977": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 1977,
- "name": "Stimulated and physiologically induced APs: frequency and fiber diameter (Sadashivaiah et al 2018)",
- "repository_type": "github",
- "summary": "\"...\r\nIn this study, we\r\naim to quantify the effects of stimulation frequency and fiber\r\ndiameter on AP (Action Potential) interactions involving collisions and loss of\r\nexcitability. We constructed a mechanistic model of a myelinated nerve\r\nfiber receiving two inputs: the underlying physiological activity at\r\nthe terminal end of the fiber, and an external stimulus applied to the\r\nmiddle of the fiber. We define conduction reliability as the\r\npercentage of physiological APs that make it to the somatic end of the\r\nnerve fiber. At low input frequencies, conduction reliability is\r\ngreater than 95% and decreases with increasing frequency due to an\r\nincrease in AP interactions. Conduction reliability is less sensitive\r\nto fiber diameter and only decreases slightly with increasing fiber\r\ndiameter. Finally, both the number and type of AP interactions\r\nsignificantly vary with both input frequencies and fiber\r\ndiameter.\r\n...\"",
- "tags": [
- {
- "id": 727,
- "tag": "Action Potential Initiation"
- },
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 728,
- "tag": "Axonal Action Potentials"
- },
- {
- "id": 767,
- "tag": "MATLAB (web link to model)"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2621,
- "tag": "ModelDB:247179"
- },
- {
- "id": 743,
- "tag": "NEURON (web link to model)"
- },
- {
- "id": 862,
- "tag": "Reliability"
- }
- ],
- "timestamp_created": "2024-01-12 18:41:17.001472+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/247179",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1978": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1978,
- "name": "Neurogenesis in the olfactory bulb controlled by top-down input (Adams et al 2018)",
- "repository_type": "github",
- "summary": "This code implements a model for adult neurogenesis of granule cells in the olfactory system. The granule cells receive sensory input via the mitral cells and top-down input from a cortical area. That cortical area also receives olfactory input from the mitral cells as well as contextual input. This plasticity leads to a network structure consisting of bidirectional connections between bulbar and cortical odor representations. The top-down input enhances stimulus discrimination based on contextual input.",
- "tags": [
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 2436,
- "tag": "Memory"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2622,
- "tag": "ModelDB:247188"
- },
- {
- "id": 1693,
- "tag": "Neurogenesis"
- },
- {
- "id": 588,
- "tag": "Olfaction"
- },
- {
- "id": 2064,
- "tag": "Pattern Separation"
- },
- {
- "id": 758,
- "tag": "Sensory processing"
- },
- {
- "id": 2623,
- "tag": "Top-down input"
- }
- ],
- "timestamp_created": "2024-01-12 18:41:17.521662+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/247188",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1979": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 1979,
- "name": "Sharpness of spike initiation in neurons explained by compartmentalization (Brette 2013)",
- "repository_type": "github",
- "summary": "\"Spike initiation determines how the combined inputs to a neuron are converted to an output. Since the pioneering work of Hodgkin and Huxley, it is known that spikes are generated by the opening of sodium channels with depolarization. According to this standard theory, these channels should open gradually when the membrane potential increases, but spikes measured at the soma appear to suddenly rise from rest. This apparent contradiction has triggered a controversy about the origin of spike \u201csharpness.\u201d This study shows with biophysical modelling that if sodium channels are placed in the axon rather than in the soma, they open all at once when the somatic membrane potential exceeds a critical value. This work explains the sharpness of spike initiation and provides another demonstration that morphology plays a critical role in neural function.\"",
- "tags": [
- {
- "id": 727,
- "tag": "Action Potential Initiation"
- },
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 728,
- "tag": "Axonal Action Potentials"
- },
- {
- "id": 2491,
- "tag": "Brian 2 (web link to model)"
- },
- {
- "id": 565,
- "tag": "Dendritic Action Potentials"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2624,
- "tag": "ModelDB:247191"
- },
- {
- "id": 569,
- "tag": "Simplified Models"
- }
- ],
- "timestamp_created": "2024-01-12 18:41:18.043152+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/247191",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "id": 1980,
- "name": "A model of neuronal bursting using three coupled first order diff. eqs. (Hindmarsh & Rose 1984)",
- "repository_type": "github",
- "summary": "R Brette's Brian 2 implementation of the classic Hindmarsh-Rose 1984 dynamical system representing neuronal bursting.",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 2491,
- "tag": "Brian 2 (web link to model)"
- },
- {
- "id": 566,
- "tag": "Bursting"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2625,
- "tag": "ModelDB:247196"
- }
- ],
- "timestamp_created": "2024-01-12 18:41:18.564977+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/247196",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "id": 1981,
- "name": "Low Threshold Calcium Currents in TC cells (Destexhe et al 1998) (Brian)",
- "repository_type": "github",
- "summary": "R Brette's implementation in Brian 2 of Destexhe et al 1998's model. The author's original code is also available from ModelDB with accession number 279 (yes, was one of the first models in ModelDB)!",
- "tags": [
- {
- "id": 2491,
- "tag": "Brian 2 (web link to model)"
- },
- {
- "id": 566,
- "tag": "Bursting"
- },
- {
- "id": 572,
- "tag": "Calcium dynamics"
- },
- {
- "id": 565,
- "tag": "Dendritic Action Potentials"
- },
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 575,
- "tag": "I T low threshold"
- },
- {
- "id": 570,
- "tag": "Influence of Dendritic Geometry"
- },
- {
- "id": 567,
- "tag": "Ion Channel Kinetics"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2626,
- "tag": "ModelDB:247209"
- },
- {
- "id": 568,
- "tag": "Parameter Fitting"
- },
- {
- "id": 573,
- "tag": "Rebound firing"
- },
- {
- "id": 569,
- "tag": "Simplified Models"
- }
- ],
- "timestamp_created": "2024-01-12 18:41:19.146153+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/247209",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
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- "username": "osbadmin"
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- "id": 1982,
- "name": "Adaptive dual control of deep brain stimulation in Parkinsons disease simulations (Grado et al 2018)",
- "repository_type": "github",
- "summary": "Adaptive dual control of deep brain stimulation in Parkinsons disease simulations (Grado et al 2018)",
- "tags": [
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2627,
- "tag": "ModelDB:247310"
- },
- {
- "id": 801,
- "tag": "Parkinson's"
- },
- {
- "id": 620,
- "tag": "Python"
- }
- ],
- "timestamp_created": "2024-01-12 18:41:19.839203+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/247310",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "1983": {
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- "content_types": "modeling",
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- "modeling"
- ],
- "default_context": "main",
- "id": 1983,
- "name": "A phantom bursting mechanism for episodic bursting (Bertram et al 2008)",
- "repository_type": "github",
- "summary": "\"We describe a novel dynamic mechanism for episodic or compound bursting\r\noscillations, in which bursts of electrical impulses are clustered together into episodes,\r\nseparated by long silent phases. We demonstrate the mechanism for episodic bursting\r\nusing a minimal mathematical model for \u201cphantom bursting.\u201d Depending on the location\r\nin parameter space, this model can produce fast, medium, or slow bursting, or in the\r\npresent case, fast, slow, and episodic bursting. The episodic bursting is modestly robust\r\nto noise and to parameter variation, and the effect that noise has on the episodic bursting\r\npattern is quite different from that of an alternate episodic burst mechanism in which\r\nthe slow envelope is produced by metabolic oscillations. This mechanism could account\r\nfor episodic bursting produced in endocrine cells or neurons, such as pancreatic islets or\r\ngonadotropin releasing neurons of the hypothalamus.\"",
- "tags": [
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 566,
- "tag": "Bursting"
- },
- {
- "id": 872,
- "tag": "CellML (web link to model)"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2628,
- "tag": "ModelDB:247646"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 568,
- "tag": "Parameter Fitting"
- },
- {
- "id": 830,
- "tag": "XPP (web link to model)"
- }
- ],
- "timestamp_created": "2024-01-12 18:41:20.365694+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/247646",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1984": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1984,
- "name": "Respiratory pacemaker neurons (Butera et al 1999)",
- "repository_type": "github",
- "summary": "A network of oscillatory bursting neurons with excitatory coupling is hypothesized to define the primary kernel for respiratory rhythm\r\ngeneration in the pre-Botzinger complex (pre-BotC) in mammals.\r\nTwo minimal models of these neurons are proposed. In model 1, bursting arises via fast activation and slow inactivation of a persistent Na current INaP-h. In model 2, bursting arises via a fast-activating\r\npersistent Na current INaP and slow activation of a K1 current IKS.\r\nIn both models, action potentials are generated via fast Na and K\r\ncurrents. The two models have few differences in parameters to facilitate a rigorous comparison of the two different burst-generating mechanisms. Both models are consistent with many of the dynamic\r\nfeatures of electrophysiological recordings from pre-BotC oscillatory\r\nbursting neurons in vitro, including voltage-dependent activity modes\r\n(silence, bursting, and beating), a voltage-dependent burst frequency\r\nthat can vary from 0.05 to .1 Hz, and a decaying spike frequency\r\nduring bursting. These results are robust and persist across a wide range of parameter values for both models. However, the dynamics of model 1 are more consistent with experimental data in that the burst\r\nduration decreases as the baseline membrane potential is depolarized and the model has a relatively flat membrane potential trajectory during the interburst interval. We propose several experimental tests\r\nto demonstrate the validity of either model and to differentiate between the two mechanisms.",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 566,
- "tag": "Bursting"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 739,
- "tag": "I Na,p"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 783,
- "tag": "I_Ks"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2629,
- "tag": "ModelDB:247647"
- }
- ],
- "timestamp_created": "2024-01-12 18:41:20.863305+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/247647",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1985": {
- "auto_sync": true,
- "content_types": "modeling",
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- "modeling"
- ],
- "default_context": "main",
- "id": 1985,
- "name": "An integrative dynamic model of brain energy metabolism (Coultier et al 2009)",
- "repository_type": "github",
- "summary": "An integrative, systems approach to the modelling of brain energy metabolism is presented. Mechanisms such as glutamate cycling between neurons and astrocytes and glycogen storage in astrocytes have been implemented. A unique feature of the model is its calibration using in vivo data of brain glucose and lactate from freely moving rats under various stimuli. The model has been used to perform simulated perturbation experiments that show that glycogen breakdown in astrocytes is significantly activated during sensory (tail pinch) stimulation. This mechanism provides an additional input of energy substrate during high consumption phases. By way of validation, data from the perfusion of 50?\u00b5M propranolol in the rat brain was compared with the model outputs. Propranolol affects the glucose dynamics during stimulation, and this was accurately reproduced in the model by a reduction in the glycogen breakdown in astrocytes. The model\u2019s predictive capacity was verified by using data from a sensory stimulation (restraint) that was not used for model calibration. Finally, a sensitivity analysis was conducted on the model parameters, this showed that the control of energy metabolism and transport processes are critical in the metabolic behaviour of cerebral tissue.",
- "tags": [
- {
- "id": 872,
- "tag": "CellML (web link to model)"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2630,
- "tag": "ModelDB:247648"
- },
- {
- "id": 751,
- "tag": "Signaling pathways"
- }
- ],
- "timestamp_created": "2024-01-12 18:41:21.381796+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/247648",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "1986": {
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- "content_types": "modeling",
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- "modeling"
- ],
- "default_context": "main",
- "id": 1986,
- "name": "Ca2+ Oscillations in Sympathetic neurons (Friel 1995)",
- "repository_type": "github",
- "summary": "\" ... This\r\nstudy focuses on caffeine-induced [Ca2+]i oscillations in sympathetic\r\nneurons. ... The aim of the study\r\nwas to understand the mechanism responsible for the oscillations. As a\r\nstarting point, [Ca2+]i relaxations were examined after membrane\r\ndepolarization and exposure to caffeine. For both stimuli,\r\npost-stimulus relaxations could be described by the sum of two\r\ndecaying exponential functions, consistent with a one-pool system in\r\nwhich Ca2+ transport between compartments is regulated by linear Ca2+\r\npumps and leaks. After modifying the store to include a\r\n[Ca2+]i-sensitive leak, the model also exhibits oscillations such as\r\nthose observed experimentally.\r\n\r\n\r\n... Thus, a one-pool model with a single\r\n[Ca2+]i-sensitive Ca2+ permeability is adequate to account for many of\r\nthe quantitative properties of steady-state [Ca2+]i oscillations in\r\nsympathetic neurons. ...\"\r\n",
- "tags": [
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 1684,
- "tag": "Ca pump"
- },
- {
- "id": 572,
- "tag": "Calcium dynamics"
- },
- {
- "id": 872,
- "tag": "CellML (web link to model)"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2631,
- "tag": "ModelDB:247655"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- }
- ],
- "timestamp_created": "2024-01-12 18:41:21.923150+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/247655",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1987": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 1987,
- "name": "Bursting in dopamine neurons (Li YX et al 1996)",
- "repository_type": "github",
- "summary": "\"Burst firing of dopaminergic neurons of the substantia nigra pars\r\ncompacta can be induced in vitro by the glutamate agonist\r\nN-methyl-D-aspartate. It has been suggested that the interburst\r\nhyperpolarization is due to Na+ extrusion by a ouabain-sensitive pump\r\n(Johnson et al. (1992) Science 258, 665-667). We formulate and explore\r\na theoretical model, with a minimal number of currents, for this novel\r\nmechanism of burst generation. This minimal model is further developed\r\ninto a more elaborate model based on observations of additional\r\ncurrents and hypotheses about their spatial distribution in\r\ndopaminergic neurons ... Responses of the model to a number of\r\nelectrophysiological and pharmacological stimuli are consistent with\r\nknown responses observed under similar conditions. ...\"",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 566,
- "tag": "Bursting"
- },
- {
- "id": 872,
- "tag": "CellML (web link to model)"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2632,
- "tag": "ModelDB:247656"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 741,
- "tag": "Sodium pump"
- }
- ],
- "timestamp_created": "2024-01-12 18:41:22.434967+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/247656",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1988": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 1988,
- "name": "Dependence of neuronal firing on astroglial membrane transport mechanisms (Oyehaug et al 2012)",
- "repository_type": "github",
- "summary": "\"Exposed to a sufficiently high extracellular potassium concentration ([K?+?]o), the neuron can fire spontaneous discharges or even become inactivated due to membrane depolarisation (\u2018depolarisation block\u2019). Since these phenomena likely are related to the maintenance and propagation of seizure discharges, it is of considerable importance to understand the conditions under which excess [K?+?]o causes them. To address the putative effect of glial buffering on neuronal activity under elevated [K?+?]o conditions, we combined a recently developed dynamical model of glial membrane ion and water transport with a Hodgkin\u2013Huxley type neuron model. In this interconnected glia-neuron model we investigated the effects of natural heterogeneity or pathological changes in glial membrane transporter density by considering a large set of models with different, yet empirically plausible, sets of model parameters. ...\"",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 804,
- "tag": "Bifurcation"
- },
- {
- "id": 566,
- "tag": "Bursting"
- },
- {
- "id": 872,
- "tag": "CellML (web link to model)"
- },
- {
- "id": 469,
- "tag": "Epilepsy"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2633,
- "tag": "ModelDB:247657"
- }
- ],
- "timestamp_created": "2024-01-12 18:41:22.972220+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/247657",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1989": {
- "auto_sync": true,
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- "modeling"
- ],
- "default_context": "main",
- "id": 1989,
- "name": "Mechanisms of extraneuronal space shrinkage (Ostby et al 2009)",
- "repository_type": "github",
- "summary": "\"Neuronal stimulation causes ~30% shrinkage of the extracellular space\r\n(ECS) between neurons and surrounding astrocytes in grey and white\r\nmatter under experimental conditions. Despite its possible\r\nimplications for a proper understanding of basic aspects of potassium\r\nclearance and astrocyte function, the phenomenon remains\r\nunexplained. Here we present a dynamic model that accounts for current\r\nexperimental data related to the shrinkage phenomenon in wild-type as\r\nwell as in gene knockout individuals.\r\n...\r\nConsidering the current\r\nstate of knowledge, the model framework appears sufficiently detailed\r\nand constrained to guide future key experiments and pave the way for\r\nmore comprehensive astroglia\u2013neuron interaction models for normal as\r\nwell as pathophysiological situations.\r\n\"",
- "tags": [
- {
- "id": 872,
- "tag": "CellML (web link to model)"
- },
- {
- "id": 1624,
- "tag": "Cellular volume dynamics"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 2634,
- "tag": "KCC1"
- },
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- },
- {
- "id": 2635,
- "tag": "ModelDB:247664"
- },
- {
- "id": 2636,
- "tag": "NBC"
- },
- {
- "id": 1687,
- "tag": "NKCC1"
- }
- ],
- "timestamp_created": "2024-01-12 18:41:23.497619+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/247664",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1990": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1990,
- "name": "Simulation of calcium signaling in fine astrocytic processes (Denizot et al 2019)",
- "repository_type": "github",
- "summary": "This model corresponds to the model presented in Denizot et al, 2019. The model indicates that the frequency of calcium signals crucially depends on the spatial organization of the IP3R channels, including their clustering and co-localization with the other sources of calcium influx to the cytosol. Spontaneous calcium signals generated by the model with realistic PAPs volume and calcium concentration successfully reproduce spontaneous calcium transients that we measured in calcium micro-domains with confocal microscopy. To our knowledge, this model is the first model suited to the investigation of spontaneous calcium dynamics in fine astrocytic processes, a crucial step towards a better understanding of the spatio-temporal integration of astrocyte signals in response to neuronal activity.",
- "tags": [
- {
- "id": 755,
- "tag": "C or Cplusplus program"
- },
- {
- "id": 572,
- "tag": "Calcium dynamics"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
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- "id": 2637,
- "tag": "ModelDB:247694"
- },
- {
- "id": 620,
- "tag": "Python"
- },
- {
- "id": 1574,
- "tag": "STEPS"
- },
- {
- "id": 751,
- "tag": "Signaling pathways"
- },
- {
- "id": 759,
- "tag": "XPPAUT"
- }
- ],
- "timestamp_created": "2024-01-12 18:41:24.004684+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/247694",
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- "email": "info@opensourcebrain.org",
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- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
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- "1991": {
- "auto_sync": true,
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- "default_context": "main",
- "id": 1991,
- "name": "Quantitative model of sleep-wake dynamics (Phillips & Robinson 2007)",
- "repository_type": "github",
- "summary": "\"A quantitative, physiology-based model of the ascending arousal system\r\nis developed, using continuum neuronal population modeling, which\r\ninvolves averaging properties such as firing rates across neurons in\r\neach population. The model includes the ventrolateral preoptic area\r\n(VLPO), where circadian and homeostatic drives enter the system, the\r\nmonoaminergic and cholinergic nuclei of the ascending arousal system,\r\nand their interconnections. The human sleep-wake cycle is governed by\r\nthe activities of these nuclei, which modulate the behavioral state of\r\nthe brain via diffuse neuromodulatory projections.\r\n\r\n...\r\nThe model behavior is robust across\r\nthe constrained parameter ranges, but with sufficient flexibility to\r\ndescribe a wide range of observed phenomena.\r\n\"",
- "tags": [
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 872,
- "tag": "CellML (web link to model)"
- },
- {
- "id": 1586,
- "tag": "Circadian Rhythms"
- },
- {
- "id": 75,
- "tag": "Homeostasis"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2638,
- "tag": "ModelDB:247696"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 592,
- "tag": "Sleep"
- },
- {
- "id": 720,
- "tag": "Temporal Pattern Generation"
- }
- ],
- "timestamp_created": "2024-01-12 18:41:24.525324+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/247696",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1992": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 1992,
- "name": "Sleep deprivation in the ascending arousal system (Phillips & Robinson 2008)",
- "repository_type": "github",
- "summary": "\"A physiologically based quantitative model of the human ascending\r\narousal system is used to study sleep deprivation after being\r\ncalibrated on a small set of experimentally based criteria. The model\r\nincludes the sleep\u2013wake switch of mutual inhibition between nuclei\r\nwhich use monoaminergic neuromodulators, and the ventrolateral\r\npreoptic area. The system is driven by the circadian rhythm and sleep\r\nhomeostasis.\r\nWe use a small number of experimentally derived criteria\r\nto calibrate the model for sleep deprivation, then investigate model\r\npredictions for other experiments, demonstrating the scope of\r\napplication.\r\n\r\n...\r\n\r\nThe form of the homeostatic drive suggests\r\nthat periods of wake during recovery from sleep deprivation are phases\r\nof relative recovery, in the sense that the homeostatic drive\r\ncontinues to converge toward baseline levels.\r\nThis undermines the\r\nconcept of sleep debt, and is in agreement with experimentally\r\nrestricted recovery protocols. Finally, we compare our model to the\r\ntwo-process model, and demonstrate the power of physiologically based\r\nmodeling by correctly predicting sleep latency times following\r\ndeprivation from experimental data.\r\n\"",
- "tags": [
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 872,
- "tag": "CellML (web link to model)"
- },
- {
- "id": 1586,
- "tag": "Circadian Rhythms"
- },
- {
- "id": 75,
- "tag": "Homeostasis"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2639,
- "tag": "ModelDB:247698"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 592,
- "tag": "Sleep"
- },
- {
- "id": 720,
- "tag": "Temporal Pattern Generation"
- }
- ],
- "timestamp_created": "2024-01-12 18:41:25.062366+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/247698",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1993": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 1993,
- "name": "Ionic current model of a Hypoglossal Motoneuron (Purvis & Butera 2005)",
- "repository_type": "github",
- "summary": "\"We have developed a single-compartment, electrophysiological,\r\nhypoglossal motoneuron (HM) model based primarily on experimental data\r\nfrom neonatal rat HMs. The model is able to reproduce the fine\r\nfeatures of the HM action potential: the fast afterhyperpolarization,\r\nthe afterdepolarization, and the medium-duration\r\nafterhyperpolarization (mAHP). The model also reproduces the\r\nrepetitive firing properties seen in neonatal HMs and replicates the\r\nneuron\u2019s response to pharmacological experiments. The model was used\r\nto study the role of specific ionic currents in HM firing and how\r\nvariations in the densities of these currents may account for\r\nage dependent changes in excitability seen in HMs. ...\"",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 572,
- "tag": "Calcium dynamics"
- },
- {
- "id": 872,
- "tag": "CellML (web link to model)"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 589,
- "tag": "I L high threshold"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 575,
- "tag": "I T low threshold"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 567,
- "tag": "Ion Channel Kinetics"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2640,
- "tag": "ModelDB:247702"
- },
- {
- "id": 569,
- "tag": "Simplified Models"
- }
- ],
- "timestamp_created": "2024-01-12 18:41:25.592509+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/247702",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1994": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 1994,
- "name": "Thalamocortical loop with delay for investigation of absence epilepsy (Liu et al 2019)",
- "repository_type": "github",
- "summary": "Conductance based network model of one thalamic reticular neuron, one thalamic pyramidal neuron and one cortical pyramidal neuron. Used to show that large delay in the corticothalamic connection can lead to multistability.",
- "tags": [
- {
- "id": 580,
- "tag": "I M"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 575,
- "tag": "I T low threshold"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2641,
- "tag": "ModelDB:247704"
- },
- {
- "id": 759,
- "tag": "XPPAUT"
- }
- ],
- "timestamp_created": "2024-01-12 18:41:26.127032+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/247704",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1995": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 1995,
- "name": "Pacemaker neurons and respiratory rhythm generation (Purvis et al 2007)",
- "repository_type": "github",
- "summary": "\"The pre-Botzinger complex (pBC) is a vital subcircuit of the\r\nrespiratory central pattern generator. Although the existence of\r\nneurons with pacemaker-like bursting properties in this network is not\r\nquestioned, their role in network rhythmogenesis is\r\nunresolved.\r\n\r\n...\r\nWe modeled the parameter\r\nvariability of experimental data from pBC bursting pacemaker and\r\nnonpacemaker neurons using a modified version of our previously\r\ndeveloped pBC neuron and network models.\r\n\r\n...\r\n\"\r\nThe paper contains network modeling results that are not represented in this model entry. Only the neuron models are included in this modeldb entry.\r\n",
- "tags": [
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 566,
- "tag": "Bursting"
- },
- {
- "id": 872,
- "tag": "CellML (web link to model)"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 739,
- "tag": "I Na,p"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2642,
- "tag": "ModelDB:247707"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 2236,
- "tag": "Pacemaking mechanism"
- },
- {
- "id": 720,
- "tag": "Temporal Pattern Generation"
- }
- ],
- "timestamp_created": "2024-01-12 18:41:26.655940+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/247707",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1996": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 1996,
- "name": "Universal feature of developing networks (Tabak et al 2010)",
- "repository_type": "github",
- "summary": "\"Spontaneous episodic activity is a fundamental mode of operation of\r\ndeveloping networks. Surprisingly, the duration of an episode of\r\nactivity correlates with the length of the silent interval that\r\nprecedes it, but not with the interval that follows. \r\n\r\n... We thus developed simple models\r\nincorporating excitatory coupling between heterogeneous neurons and\r\nactivity-dependent synaptic depression. These models robustly\r\ngenerated episodic activity with the correct correlation pattern.\r\n\r\nThe\r\ncorrelation pattern resulted from episodes being triggered at random\r\nlevels of recovery from depression while they terminated around the\r\nsame level of depression. To explain this fundamental difference\r\nbetween episode onset and termination, we used a mean field model,\r\nwhere only average activity and average level of recovery from\r\nsynaptic depression are considered.\r\n...\r\nThis work further shows that networks with widely different\r\narchitectures, different cell types, and different functions all\r\noperate according to the same general mechanism early in their\r\ndevelopment.\"",
- "tags": [
- {
- "id": 793,
- "tag": "Development"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2643,
- "tag": "ModelDB:247709"
- },
- {
- "id": 830,
- "tag": "XPP (web link to model)"
- }
- ],
- "timestamp_created": "2024-01-12 18:41:27.204270+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/247709",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1997": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 1997,
- "name": "Universal feature of developing networks (Tabak et al 2010) (CellML)",
- "repository_type": "github",
- "summary": "\"Spontaneous episodic activity is a fundamental mode of operation of\r\ndeveloping networks. Surprisingly, the duration of an episode of\r\nactivity correlates with the length of the silent interval that\r\nprecedes it, but not with the interval that follows. \r\n\r\n... We thus developed simple models\r\nincorporating excitatory coupling between heterogeneous neurons and\r\nactivity-dependent synaptic depression. These models robustly\r\ngenerated episodic activity with the correct correlation pattern.\r\n\r\nThe\r\ncorrelation pattern resulted from episodes being triggered at random\r\nlevels of recovery from depression while they terminated around the\r\nsame level of depression. To explain this fundamental difference\r\nbetween episode onset and termination, we used a mean field model,\r\nwhere only average activity and average level of recovery from\r\nsynaptic depression are considered.\r\n...\r\nThis work further shows that networks with widely different\r\narchitectures, different cell types, and different functions all\r\noperate according to the same general mechanism early in their\r\ndevelopment.\" This modeldb entry only has the mean field model as networks are not implementable currently in CellML.",
- "tags": [
- {
- "id": 872,
- "tag": "CellML (web link to model)"
- },
- {
- "id": 793,
- "tag": "Development"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2644,
- "tag": "ModelDB:247711"
- }
- ],
- "timestamp_created": "2024-01-12 18:41:27.720604+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/247711",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1998": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 1998,
- "name": "A multiscale approach to analyze circadian rhythms (Vasalou & Henson, 2010) (CellML)",
- "repository_type": "github",
- "summary": "\" ... We developed a firing rate code model to incorporate known\r\nelectrophysiological properties of SCN (suprachiasmatic nucleus)\r\npacemaker cells, including circadian dependent changes in membrane\r\nvoltage and ion conductances. Calcium dynamics were included in the\r\nmodel as the putative link between electrical firing and gene\r\nexpression. Individual ion currents exhibited oscillatory patterns\r\nmatching experimental data both in current levels and phase\r\nrelationships. VIP and GABA neurotransmitters, which encode synaptic\r\nsignals across the SCN, were found to play critical roles in daily\r\noscillations of membrane excitability and gene expression. Blocking\r\nvarious mechanisms of intracellular calcium accumulation by simulated\r\npharmacological agents (nimodipine, IP3- and ryanodine-blockers)\r\nreproduced experimentally observed trends in firing rate dynamics and\r\ncore-clock gene transcription. The intracellular calcium concentration\r\nwas shown to regulate diverse circadian processes such as firing\r\nfrequency, gene expression and system periodicity. The model predicted\r\na direct relationship between firing frequency and gene expression\r\namplitudes, demonstrated the importance of intracellular pathways for\r\nsingle cell behavior and provided a novel multiscale framework which\r\ncaptured characteristics of the SCN at both the electrophysiological\r\nand gene regulatory levels.\"",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 572,
- "tag": "Calcium dynamics"
- },
- {
- "id": 872,
- "tag": "CellML (web link to model)"
- },
- {
- "id": 1586,
- "tag": "Circadian Rhythms"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2645,
- "tag": "ModelDB:247713"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 1919,
- "tag": "Reaction-diffusion"
- },
- {
- "id": 751,
- "tag": "Signaling pathways"
- },
- {
- "id": 720,
- "tag": "Temporal Pattern Generation"
- }
- ],
- "timestamp_created": "2024-01-12 18:41:28.228286+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/247713",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "1999": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 1999,
- "name": "A multiscale approach to analyze circadian rhythms (Vasalou & Henson, 2010) (SBML)",
- "repository_type": "github",
- "summary": "\" ... We developed a firing rate code model to incorporate known\r\nelectrophysiological properties of SCN (suprachiasmatic nucleus)\r\npacemaker cells, including circadian dependent changes in membrane\r\nvoltage and ion conductances. Calcium dynamics were included in the\r\nmodel as the putative link between electrical firing and gene\r\nexpression. Individual ion currents exhibited oscillatory patterns\r\nmatching experimental data both in current levels and phase\r\nrelationships. VIP and GABA neurotransmitters, which encode synaptic\r\nsignals across the SCN, were found to play critical roles in daily\r\noscillations of membrane excitability and gene expression. Blocking\r\nvarious mechanisms of intracellular calcium accumulation by simulated\r\npharmacological agents (nimodipine, IP3- and ryanodine-blockers)\r\nreproduced experimentally observed trends in firing rate dynamics and\r\ncore-clock gene transcription. The intracellular calcium concentration\r\nwas shown to regulate diverse circadian processes such as firing\r\nfrequency, gene expression and system periodicity. The model predicted\r\na direct relationship between firing frequency and gene expression\r\namplitudes, demonstrated the importance of intracellular pathways for\r\nsingle cell behavior and provided a novel multiscale framework which\r\ncaptured characteristics of the SCN at both the electrophysiological\r\nand gene regulatory levels.\"",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 572,
- "tag": "Calcium dynamics"
- },
- {
- "id": 1586,
- "tag": "Circadian Rhythms"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2646,
- "tag": "ModelDB:247719"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 1919,
- "tag": "Reaction-diffusion"
- },
- {
- "id": 828,
- "tag": "SBML (web link to model)"
- },
- {
- "id": 751,
- "tag": "Signaling pathways"
- },
- {
- "id": 720,
- "tag": "Temporal Pattern Generation"
- }
- ],
- "timestamp_created": "2024-01-12 18:41:29.178224+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/247719",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2000": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 2000,
- "name": "Visual physiology of the layer 4 cortical circuit in silico (Arkhipov et al 2018)",
- "repository_type": "github",
- "summary": "\"Despite advances in experimental techniques and accumulation of large datasets concerning\r\nthe composition and properties of the cortex, quantitative modeling of cortical circuits\r\nunder in-vivo-like conditions remains challenging. Here we report and publicly release a biophysically\r\ndetailed circuit model of layer 4 in the mouse primary visual cortex, receiving thalamo-\r\ncortical visual inputs. The 45,000-neuron model was subjected to a battery of visual\r\nstimuli, and results were compared to published work and new in vivo experiments. ...\"",
- "tags": [
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 2647,
- "tag": "BioNet (web link to model)"
- },
- {
- "id": 1527,
- "tag": "Brain Rhythms"
- },
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 1799,
- "tag": "Gamma oscillations"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 842,
- "tag": "I Krp"
- },
- {
- "id": 589,
- "tag": "I L high threshold"
- },
- {
- "id": 580,
- "tag": "I M"
- },
- {
- "id": 739,
- "tag": "I Na,p"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 575,
- "tag": "I T low threshold"
- },
- {
- "id": 2319,
- "tag": "IK Skca"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2648,
- "tag": "ModelDB:247848"
- },
- {
- "id": 743,
- "tag": "NEURON (web link to model)"
- },
- {
- "id": 1569,
- "tag": "Orientation selectivity"
- },
- {
- "id": 569,
- "tag": "Simplified Models"
- },
- {
- "id": 1829,
- "tag": "Triggered activity"
- }
- ],
- "timestamp_created": "2024-01-12 18:41:29.738728+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/247848",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "2001": {
- "auto_sync": true,
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- "default_context": "master",
- "id": 2001,
- "name": "Gamma genesis in the basolateral amygdala (Feng et al 2019)",
- "repository_type": "github",
- "summary": "Using in vitro and in vivo data we develop the first large-scale biophysically and anatomically realistic model of the basolateral amygdala nucleus (BL), which reproduces the dynamics of the in vivo local field potential (LFP). Significantly, it predicts that BL intrinsically generates the transient gamma oscillations observed in vivo. The model permitted exploration of the poorly understood synaptic mechanisms underlying gamma genesis in BL, and the model's ability to compute LFPs at arbitrary numbers of recording sites provided insights into the characteristics of the spatial properties of gamma bursts. Furthermore, we show how gamma synchronizes principal cells to overcome their low firing rates while simultaneously promoting competition, potentially impacting their afferent selectivity and efferent drive, and thus emotional behavior.",
- "tags": [
- {
- "id": 1684,
- "tag": "Ca pump"
- },
- {
- "id": 1799,
- "tag": "Gamma oscillations"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 589,
- "tag": "I L high threshold"
- },
- {
- "id": 580,
- "tag": "I M"
- },
- {
- "id": 739,
- "tag": "I Na,p"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 1433,
- "tag": "I_AHP"
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- {
- "id": 564,
- "tag": "ModelDB"
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- "id": 2649,
- "tag": "ModelDB:247968"
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- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 724,
- "tag": "Short-term Synaptic Plasticity"
- }
- ],
- "timestamp_created": "2024-01-12 18:41:30.306985+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/247968",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "2002": {
- "auto_sync": true,
- "content_types": "modeling",
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- "modeling"
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- "default_context": "master",
- "id": 2002,
- "name": "Towards a biologically plausible model of LGN-V1 pathways (Lian et al 2019)",
- "repository_type": "github",
- "summary": "\"Increasing evidence supports the hypothesis that the visual system\r\nemploys a sparse code to represent visual stimuli, where information\r\nis encoded in an efficient way by a small population of cells that\r\nrespond to sensory input at a given time. This includes simple cells\r\nin primary visual cortex (V1), which are defined by their linear\r\nspatial integration of visual stimuli. Various models of sparse coding\r\nhave been proposed to explain physiological phenomena observed in\r\nsimple cells. However, these models have usually made the simplifying\r\nassumption that inputs to simple cells already incorporate linear\r\nspatial summation. This overlooks the fact that these inputs are known\r\nto have strong non-linearities such as the separation of ON and OFF\r\npathways, or separation of excitatory and inhibitory\r\nneurons. Consequently these models ignore a range of important\r\nexperimental phenomena that are related to the emergence of linear\r\nspatial summation from non-linear inputs, such as segregation of ON\r\nand OFF sub-regions of simple cell receptive fields, the push-pull\r\neffect of excitation and inhibition, and phase-reversed\r\ncortico-thalamic feedback. Here, we demonstrate that a two-layer model\r\nof the visual pathway from the lateral geniculate nucleus to V1 that\r\nincorporates these biological constraints on the neural circuits and\r\nis based on sparse coding can account for the emergence of these\r\nexperimental phenomena, diverse shapes of receptive fields and\r\ncontrast invariance of orientation tuning of simple cells when the\r\nmodel is trained on natural images. The model suggests that sparse\r\ncoding can be implemented by the V1 simple cells using neural circuits\r\nwith a simple biologically plausible architecture.\"",
- "tags": [
- {
- "id": 808,
- "tag": "Hebbian plasticity"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2650,
- "tag": "ModelDB:247970"
- }
- ],
- "timestamp_created": "2024-01-12 18:41:30.836078+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/247970",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2003": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
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- "default_context": "master",
- "id": 2003,
- "name": "Pancreatic Beta Cell signalling pathways (Fridlyand & Philipson 2016) (MATLAB)",
- "repository_type": "github",
- "summary": "This is a 3rd party implementation of Fridlyand & Philipson 2016 who's abstract begins \"Insulin secretory in pancreatic beta-cells responses to nutrient\r\nstimuli and hormonal modulators include multiple messengers and\r\nsignaling pathways with complex interdependencies. Here we present a\r\ncomputational model that incorporates recent data on glucose\r\nmetabolism, plasma membrane potential, G-protein-coupled-receptors\r\n(GPCR), cytoplasmic and endoplasmic reticulum calcium dynamics, cAMP\r\nand phospholipase C pathways that regulate interactions between second\r\nmessengers in pancreatic beta-cells. The values of key model\r\nparameters were inferred from published experimental data. The model\r\ngives a reasonable fit to important aspects of experimentally measured\r\nmetabolic and second messenger concentrations and provides a framework\r\nfor analyzing the role of metabolic, hormones and neurotransmitters\r\nchanges on insulin secretion. Our analysis of the dynamic data\r\nprovides support for the hypothesis that activation of Ca2+-dependent\r\nadenylyl cyclases play a critical role in modulating the effects of\r\nglucagon-like peptide 1 (GLP-1), glucose-dependent insulinotropic\r\npolypeptide (GIP) and catecholamines. ...\"",
- "tags": [
- {
- "id": 795,
- "tag": "ATP-senstive potassium current"
- },
- {
- "id": 1684,
- "tag": "Ca pump"
- },
- {
- "id": 572,
- "tag": "Calcium dynamics"
- },
- {
- "id": 2211,
- "tag": "Electrical-chemical"
- },
- {
- "id": 781,
- "tag": "G-protein coupled"
- },
- {
- "id": 567,
- "tag": "Ion Channel Kinetics"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2651,
- "tag": "ModelDB:248313"
- }
- ],
- "timestamp_created": "2024-01-12 18:41:31.381213+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/248313",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "2004": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
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- "default_context": "master",
- "id": 2004,
- "name": "Action potential-evoked Na+ influx similar in axon and soma (Fleidervish et al. 2010) (Python)",
- "repository_type": "github",
- "summary": "\"In cortical pyramidal neurons, the axon initial segment (AIS) is pivotal in synaptic integration. It has been asserted that this is because there is a high density of Na+ channels in the AIS. However, we found that action potential-associated Na+ flux, as measured by high-speed fluorescence Na+ imaging, was about threefold larger in the rat AIS than in the soma. Spike-evoked Na+ flux in the AIS and the first node of Ranvier was similar and was eightfold lower in basal dendrites. ... In computer simulations, these data were consistent with the known features of action potential generation in these neurons.\"",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 579,
- "tag": "Active Dendrites"
- },
- {
- "id": 739,
- "tag": "I Na,p"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2652,
- "tag": "ModelDB:249404"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 620,
- "tag": "Python"
- },
- {
- "id": 1919,
- "tag": "Reaction-diffusion"
- }
- ],
- "timestamp_created": "2024-01-12 18:41:31.910015+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/249404",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "2005": {
- "auto_sync": true,
- "content_types": "modeling",
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- "modeling"
- ],
- "default_context": "master",
- "id": 2005,
- "name": "A Computational Model of Bidirectional Plasticity Regulation by betaCaMKII (Pinto et al. 2019)",
- "repository_type": "github",
- "summary": "We present a computational model that suggests how calcium-calmodulin dependent protein kinase II can act as a molecular switch in synaptic plasticity induction at an important cerebellar synapse (between parallel fibres and Purkinje cells). Our simulation results provide a potential explanation for experimental data by van Woerden et al (Van Woerden G, Hoebeek F, Gao Z, Nagaraja R, Hoogenraad C, Kushner S, et al. [beta]CaMKII controls the direction of plasticity at parallel fiber-Purkinje cell synapses. Nat Neurosci. 2009;12(7):823-825). These experiments were performed in the lab led by Professor Chris De Zeeuw.",
- "tags": [
- {
- "id": 572,
- "tag": "Calcium dynamics"
- },
- {
- "id": 722,
- "tag": "Depression"
- },
- {
- "id": 749,
- "tag": "Long-term Synaptic Plasticity"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2653,
- "tag": "ModelDB:249405"
- },
- {
- "id": 725,
- "tag": "Synaptic Plasticity"
- },
- {
- "id": 759,
- "tag": "XPPAUT"
- }
- ],
- "timestamp_created": "2024-01-12 18:41:32.416775+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/249405",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "2006": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 2006,
- "name": "A computational model of action selection in the basal ganglia (Suryanarayana et al 2019)",
- "repository_type": "github",
- "summary": "\" ... Here, we incorporate newly revealed subgroups of neurons\r\nwithin the GPe into an existing computational model of the basal\r\nganglia, and investigate their role in action selection. Three\r\nmain results ensued. First, using previously used metrics for\r\nselection, the new extended connectivity improved the action\r\nselection performance of the model. Second, low frequency theta\r\noscillations were observed in the subpopulation of the GPe (the\r\nTA or \u2018arkypallidal\u2019 neurons) which project exclusively to the\r\nstriatum. These oscillations were suppressed by increased\r\ndopamine activity \u2014 revealing a possible link with symptoms of\r\nParkinson\u2019s disease. Third, a new phenomenon was observed in\r\nwhich the usual monotonic relationship between input to the basal\r\nganglia and its output within an action \u2018channel\u2019 was, under some\r\ncircumstances, reversed.\r\n...\"",
- "tags": [
- {
- "id": 771,
- "tag": "Action Selection/Decision Making"
- },
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2654,
- "tag": "ModelDB:249408"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- }
- ],
- "timestamp_created": "2024-01-12 18:41:32.934188+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/249408",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2007": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 2007,
- "name": "Layer V pyramidal cell functions and schizophrenia genetics (M\u00e4ki-Marttunen et al 2019)",
- "repository_type": "github",
- "summary": "Study on how GWAS-identified risk genes of shizophrenia affect excitability and integration of inputs in thick-tufted layer V pyramidal cells",
- "tags": [
- {
- "id": 727,
- "tag": "Action Potential Initiation"
- },
- {
- "id": 565,
- "tag": "Dendritic Action Potentials"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 730,
- "tag": "I A, slow"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 589,
- "tag": "I L high threshold"
- },
- {
- "id": 580,
- "tag": "I M"
- },
- {
- "id": 739,
- "tag": "I Na,p"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 575,
- "tag": "I T low threshold"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2655,
- "tag": "ModelDB:249463"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 620,
- "tag": "Python"
- },
- {
- "id": 845,
- "tag": "Schizophrenia"
- },
- {
- "id": 596,
- "tag": "Synaptic Integration"
- }
- ],
- "timestamp_created": "2024-01-12 18:41:33.469217+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/249463",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2008": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 2008,
- "name": "Large-scale laminar model of macaque cortex (Mejias et al 2016)",
- "repository_type": "github",
- "summary": "This code reproduces the large-scale cortical model with laminar structure presented in Mejias et al., Science Advances 2016. The model includes different scales (intra-laminar, inter-laminar, inter-areal and large-scale) across macaque neocortex and reproduces experimentally observed dynamics of gamma and alpha/beta oscillations across these scales. It makes use of real anatomical data from the macaque cortex. Some parts of the code require external packages or data (see readme file for details).",
- "tags": [
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2656,
- "tag": "ModelDB:249589"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- }
- ],
- "timestamp_created": "2024-01-12 18:41:34.137708+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/249589",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2009": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 2009,
- "name": "Glutamate mediated dendritic and somatic plateau potentials in cortical L5 pyr cells (Gao et al '20)",
- "repository_type": "github",
- "summary": "Our model was built on a reconstructed Layer 5 pyramidal neuron of the rat medial prefrontal cortex, and constrained by 4 sets of experimental data: (i) voltage waveforms obtained at the site of the glutamatergic input in distal basal dendrite, including initial sodium spikelet, fast rise, plateau phase and abrupt collapse of the plateau; (ii) a family of voltage traces describing dendritic membrane responses to gradually increasing intensity of glutamatergic stimulation; (iii) voltage waveforms of backpropagating action potentials in basal dendrites (Antic, 2003); and (iv) the change of backpropagating action potential amplitude in response to drugs that block Na+ or K+ channels (Acker and Antic, 2009). Both, synaptic AMPA/NMDA and extrasynaptic NMDA inputs were placed on basal dendrites to model the induction of local regenerative potentials termed \"glutamate-mediated dendritic plateau potentials\". The active properties of the cell were tuned to match the voltage waveform, amplitude and duration of experimentally observed plateau potentials. The effects of input location, receptor conductance, channel properties and membrane time constant during plateau were explored. The new model predicted that during dendritic plateau potential the somatic membrane time constant is reduced. This and other model predictions were then tested in real neurons. Overall, the results support our theoretical framework that dendritic plateau potentials bring neuronal cell body into a depolarized state (\"UP state\"), which lasts 200 - 500 ms, or more. Plateau potentials profoundly change neuronal state -- a plateau potential triggered in one basal dendrite depolarizes the soma and shortens membrane time constant, making the cell more susceptible to action potential firing triggered by other afferent inputs. Plateau potentials may allow cortical pyramidal neurons to tune into ongoing network activity and potentially enable synchronized firing, to form active neural ensembles.",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 579,
- "tag": "Active Dendrites"
- },
- {
- "id": 728,
- "tag": "Axonal Action Potentials"
- },
- {
- "id": 572,
- "tag": "Calcium dynamics"
- },
- {
- "id": 752,
- "tag": "Dendritic Bistability"
- },
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 2122,
- "tag": "Membrane Properties"
- },
- {
- "id": 564,
- "tag": "ModelDB"
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- {
- "id": 2657,
- "tag": "ModelDB:249705"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 620,
- "tag": "Python"
- },
- {
- "id": 596,
- "tag": "Synaptic Integration"
- }
- ],
- "timestamp_created": "2024-01-12 18:41:34.674707+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/249705",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2010": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 2010,
- "name": "Inhibitory neuron plasticity as a mechanism for ocular dominance plasticity (Bono & Clopath 2019)",
- "repository_type": "github",
- "summary": "\"Ocular dominance plasticity is a well-documented phenomenon\r\nallowing us to study properties of cortical\r\nmaturation. Understanding this maturation might be an important\r\nstep towards unravelling how cortical circuits function. However,\r\nit is still not fully understood which mechanisms are responsible\r\nfor the opening and closing of the critical period for ocular\r\ndominance and how changes in cortical responsiveness arise after\r\nvisual deprivation. In this article, we present a theory of\r\nocular dominance plasticity. Following recent experimental work,\r\nwe propose a framework where a reduction in inhibition is\r\nnecessary for ocular dominance plasticity in both juvenile and\r\nadult animals. In this framework, two ingredients are crucial to\r\nobserve ocular dominance shifts: a sufficient level of inhibition\r\nas well as excitatory-to-inhibitory synaptic plasticity. In our\r\nmodel, the former is responsible for the opening of the critical\r\nperiod, while the latter limits the plasticity in adult\r\nanimals. Finally, we also provide a possible explanation for the\r\nvariability in ocular dominance shifts observed in individual\r\nneurons and for the counter-intuitive shifts towards the closed\r\neye.\"",
- "tags": [
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2658,
- "tag": "ModelDB:249706"
- },
- {
- "id": 620,
- "tag": "Python"
- },
- {
- "id": 725,
- "tag": "Synaptic Plasticity"
- }
- ],
- "timestamp_created": "2024-01-12 18:41:35.187606+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/249706",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "2011": {
- "auto_sync": true,
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- "modeling"
- ],
- "default_context": "master",
- "id": 2011,
- "name": "Modelling large scale electrodiffusion near morphologically detailed neurons (Solbra et al 2018)",
- "repository_type": "github",
- "summary": "\" ... Here, we present the 3-D Kirchhoff-Nernst-Planck (KNP) framework, tailored to explore electrodiffusive effects on large spatiotemporal scales. By assuming electroneutrality, the KNP-framework circumvents charge-relaxation processes on the spatiotemporal scales of nanometers and nanoseconds, and makes it feasible to run simulations on the spatiotemporal scales of millimeters and seconds on a standard desktop computer. In the present work, we use the 3-D KNP framework to simulate the dynamics of ion concentrations and the electrical potential surrounding a morphologically detailed pyramidal cell. ...\"",
- "tags": [
- {
- "id": 734,
- "tag": "Extracellular Fields"
- },
- {
- "id": 2659,
- "tag": "KNPsim (web link to method)"
- },
- {
- "id": 756,
- "tag": "Methods"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2660,
- "tag": "ModelDB:249847"
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- {
- "id": 743,
- "tag": "NEURON (web link to model)"
- }
- ],
- "timestamp_created": "2024-01-12 18:41:35.714749+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/249847",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "auto_sync": true,
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- "modeling"
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- "id": 2012,
- "name": "Four-pathway phenomenological synaptic plasticity model (Ebner et al. 2019)",
- "repository_type": "github",
- "summary": "Four-pathway phenomenological synaptic plasticity model (Ebner et al. 2019)",
- "tags": [
- {
- "id": 579,
- "tag": "Active Dendrites"
- },
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 570,
- "tag": "Influence of Dendritic Geometry"
- },
- {
- "id": 749,
- "tag": "Long-term Synaptic Plasticity"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2661,
- "tag": "ModelDB:251493"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 725,
- "tag": "Synaptic Plasticity"
- }
- ],
- "timestamp_created": "2024-01-12 18:41:36.204810+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/251493",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2013": {
- "auto_sync": true,
- "content_types": "modeling",
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- "modeling"
- ],
- "default_context": "master",
- "id": 2013,
- "name": "Thalamocortical relay neuron models constrained by experiment and optimization (Iavarone et al 2019)",
- "repository_type": "github",
- "summary": "Thalamocortical relay neuron models constrained by experiment and optimization (Iavarone et al 2019)",
- "tags": [
- {
- "id": 2592,
- "tag": "BluePyOpt"
- },
- {
- "id": 566,
- "tag": "Bursting"
- },
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 589,
- "tag": "I L high threshold"
- },
- {
- "id": 739,
- "tag": "I Na,p"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 575,
- "tag": "I T low threshold"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2662,
- "tag": "ModelDB:251881"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 568,
- "tag": "Parameter Fitting"
- },
- {
- "id": 863,
- "tag": "Parameter sensitivity"
- }
- ],
- "timestamp_created": "2024-01-12 18:41:36.722687+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/251881",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2014": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 2014,
- "name": "Factors contribution to GDP-induced [Cl-]i transients (Lombardi et al 2019)",
- "repository_type": "github",
- "summary": "This models are used to evaluate which factors influence the GDP (giant depolarizing potential) induced [Cl-]I transients based on a initial model of P. Jedlicka",
- "tags": [
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2663,
- "tag": "ModelDB:253369"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 725,
- "tag": "Synaptic Plasticity"
- }
- ],
- "timestamp_created": "2024-01-12 18:41:37.255776+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/253369",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2015": {
- "auto_sync": true,
- "content_types": "modeling",
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- "modeling"
- ],
- "default_context": "main",
- "id": 2015,
- "name": "Excitatory and inhibitory population activity (Bittner et al 2017) (Litwin-Kumar & Doiron 2017)",
- "repository_type": "github",
- "summary": "\"Many studies use population analysis approaches, such as\r\ndimensionality reduction, to characterize the activity of large groups\r\nof neurons. To date, these methods have treated each neuron equally,\r\nwithout taking into account whether neurons are excitatory or\r\ninhibitory. We studied population activity structure as a function of\r\nneuron type by applying factor analysis to spontaneous activity from\r\nspiking networks with balanced excitation and inhibition.\r\nThroughout\r\nthe study, we characterized population activity structure by measuring\r\nits dimensionality and the percentage of overall activity variance\r\nthat is shared among neurons. First, by sampling only excitatory or\r\nonly inhibitory neurons, we found that the activity structures of\r\nthese two populations in balanced networks are measurably\r\ndifferent. We also found that the population activity structure is\r\ndependent on the ratio of excitatory to inhibitory neurons\r\nsampled. Finally we classified neurons from extracellular recordings\r\nin the primary visual cortex of anesthetized macaques as putative\r\nexcitatory or inhibitory using waveform classification, and found\r\nsimilarities with the neuron type-specific population activity\r\nstructure of a balanced network with excitatory clustering. These\r\nresults imply that knowledge of neuron type is important, and allows\r\nfor stronger statistical tests, when interpreting population activity\r\nstructure.\"",
- "tags": [
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 2664,
- "tag": "Julia (web link to model)"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2665,
- "tag": "ModelDB:253624"
- }
- ],
- "timestamp_created": "2024-01-12 18:41:37.773319+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/253624",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2016": {
- "auto_sync": true,
- "content_types": "modeling",
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- "modeling"
- ],
- "default_context": "master",
- "id": 2016,
- "name": "Voltage imaging calibration in tuft dendrites of mitral cells (Djurisic et al 2004)",
- "repository_type": "github",
- "summary": "A detailed morphology of a tuft is provided in a reconstruction of a mitral cell that was used to place simulated estimates on for the calibration of EPSPs as recorded in voltage imaging in the real cells (estimated to be within +12% to -18% of the actual amplitude).",
- "tags": [
- {
- "id": 756,
- "tag": "Methods"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2666,
- "tag": "ModelDB:253991"
- }
- ],
- "timestamp_created": "2024-01-12 18:41:38.279987+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/253991",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "auto_sync": true,
- "content_types": "modeling",
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- "modeling"
- ],
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- "id": 2017,
- "name": "Dendritic action potentials and computation in human layer 2/3 cortical neurons (Gidon et al 2020)",
- "repository_type": "github",
- "summary": "This code reproduces figs 3 and S9 in Dendritic action potentials in layer 2/3 pyramidal neurons of the human neocortex.\r\n",
- "tags": [
- {
- "id": 565,
- "tag": "Dendritic Action Potentials"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 1532,
- "tag": "I Na, leak"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2667,
- "tag": "ModelDB:254217"
- },
- {
- "id": 577,
- "tag": "NEURON"
- }
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- "timestamp_created": "2024-01-12 18:41:38.804370+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/254217",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2018": {
- "auto_sync": true,
- "content_types": "modeling",
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- "modeling"
- ],
- "default_context": "master",
- "id": 2018,
- "name": "Persistent Spiking in ACC Neurons (Ratte et al 2018)",
- "repository_type": "github",
- "summary": "\"Neurons use action potentials, or spikes, to encode information. Some neurons can store information for short periods (seconds to minutes) by continuing to spike after a stimulus ends, thus enabling working memory. This so-called \u201cpersistent\u201d spiking occurs in many brain areas and has been linked to activation of canonical transient receptor potential (TRPC) channels. However, TRPC activation alone is insufficient to explain many aspects of persistent spiking such as resumption of spiking after periods of imposed quiescence. Using experiments and simulations, we show that calcium influx caused by spiking is necessary and sufficient to activate TRPC channels and that the ensuing positive feedback interaction between intracellular calcium and TRPC channel activation can account for many hitherto unexplained aspects of persistent spiking.\"",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 572,
- "tag": "Calcium dynamics"
- },
- {
- "id": 731,
- "tag": "I CAN"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 1433,
- "tag": "I_AHP"
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- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2668,
- "tag": "ModelDB:255569"
- },
- {
- "id": 2058,
- "tag": "Persistent activity"
- },
- {
- "id": 794,
- "tag": "Working memory"
- },
- {
- "id": 759,
- "tag": "XPPAUT"
- }
- ],
- "timestamp_created": "2024-01-12 18:41:39.423318+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/255569",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "2019": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 2019,
- "name": "Modelling platform of the cochlear nucleus and other auditory circuits (Manis & Compagnola 2018)",
- "repository_type": "github",
- "summary": "\"Models of the auditory brainstem have been an invaluable tool for testing hypotheses about auditory information processing and for highlighting the most important gaps in the experimental literature. Due to the complexity of the auditory brainstem, and indeed most brain circuits, the dynamic behavior of the system may be difficult to predict without a detailed, biologically realistic computational model. Despite the sensitivity of models to their exact construction and parameters, most prior models of the cochlear nucleus have incorporated only a small subset of the known biological properties. This confounds the interpretation of modelling results and also limits the potential future uses of these models, which require a large effort to develop. To address these issues, we have developed a general purpose, bio-physically detailed model of the cochlear nucleus for use both in testing hypotheses about cochlear nucleus function and also as an input to models of downstream auditory nuclei. The model implements conductance-based Hodgkin-Huxley representations of cells using a Python-based interface to the NEURON simulator. ...\"",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 572,
- "tag": "Calcium dynamics"
- },
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 742,
- "tag": "I p,q"
- },
- {
- "id": 769,
- "tag": "I_KHT"
- },
- {
- "id": 783,
- "tag": "I_Ks"
- },
- {
- "id": 1478,
- "tag": "Information transfer"
- },
- {
- "id": 784,
- "tag": "KCNQ1"
- },
- {
- "id": 1931,
- "tag": "Kir"
- },
- {
- "id": 564,
- "tag": "ModelDB"
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- {
- "id": 2669,
- "tag": "ModelDB:256021"
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- "id": 577,
- "tag": "NEURON"
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- "id": 620,
- "tag": "Python"
- }
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- "timestamp_created": "2024-01-12 18:41:39.972079+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/256021",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2020": {
- "auto_sync": true,
- "content_types": "modeling",
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- "modeling"
- ],
- "default_context": "master",
- "id": 2020,
- "name": "LGMD impedance (Dewell & Gabbiani 2019)",
- "repository_type": "github",
- "summary": "\"How neurons filter and integrate their complex patterns of synaptic inputs is central to their role in neural information processing . Synaptic filtering and integration are shaped by the frequency-dependent neuronal membrane impedance. Using single and dual dendritic recordings in vivo, pharmacology, and computational modeling, we characterized the membrane impedance of a collision detection neuron in the grasshopper, Schistocerca americana. This neuron, the lobula giant movement detector (LGMD), exhibits consistent impedance properties across frequencies and membrane potentials. Two common active conductances gH and gM, mediated respectively by hyperpolarization-activated cyclic nucleotide gated (HCN) channels and by muscarine sensitive M-type K+ channels, promote broadband integration with high temporal precision over the LGMD's natural range of membrane potentials and synaptic input frequencies. Additionally, we found that a model based on the LGMD's branching morphology increased the gain and decreased the delay associated with the mapping of synaptic input currents to membrane potential. More generally, this was true for a wide range of model neuron morphologies, including those of neocortical pyramidal neurons and cerebellar Purkinje cells. These findings show the unexpected role played by two widespread active conductances and by dendritic morphology in shaping synaptic integration.\"",
- "tags": [
- {
- "id": 579,
- "tag": "Active Dendrites"
- },
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 580,
- "tag": "I M"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 2122,
- "tag": "Membrane Properties"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2670,
- "tag": "ModelDB:256024"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 596,
- "tag": "Synaptic Integration"
- }
- ],
- "timestamp_created": "2024-01-12 18:41:40.503946+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/256024",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2021": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 2021,
- "name": "The basis of sharp spike onset in standard biophysical models (Telenczuk et al 2017)",
- "repository_type": "github",
- "summary": "\"In most vertebrate neurons, spikes initiate in the axonal initial segment (AIS). When recorded in the soma, they have a surprisingly sharp onset, as if sodium (Na) channels opened abruptly. The main view stipulates that spikes initiate in a conventional manner at the distal end of the AIS, then progressively sharpen as they backpropagate to the soma. We examined the biophysical models used to substantiate this view, and we found that spikes do not initiate through a local axonal current loop that propagates along the axon, but through a global current loop encompassing the AIS and soma, which forms an electrical dipole. Therefore, the phenomenon is not adequately modeled as the backpropagation of an electrical wave along the axon, since the wavelength would be as large as the entire system. Instead, in these models, we found that spike initiation rather follows the critical resistive coupling model proposed recently, where the Na current entering the AIS is matched by the axial resistive current flowing to the soma. ...\"",
- "tags": [
- {
- "id": 727,
- "tag": "Action Potential Initiation"
- },
- {
- "id": 728,
- "tag": "Axonal Action Potentials"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2671,
- "tag": "ModelDB:256028"
- },
- {
- "id": 743,
- "tag": "NEURON (web link to model)"
- },
- {
- "id": 853,
- "tag": "Python (web link to model)"
- }
- ],
- "timestamp_created": "2024-01-12 18:41:41.060774+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/256028",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2022": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 2022,
- "name": "Spike burst-pause dynamics of Purkinje cells regulate sensorimotor adaptation (Luque et al 2019)",
- "repository_type": "github",
- "summary": "\"Cerebellar Purkinje cells mediate accurate eye movement\r\ncoordination. However, it remains unclear how oculomotor\r\nadaptation depends on the interplay between the characteristic\r\nPurkinje cell response patterns, namely tonic, bursting, and\r\nspike pauses. Here, a spiking cerebellar model assesses the role\r\nof Purkinje cell firing patterns in vestibular ocular\r\nreflex (VOR) adaptation. The model captures the cerebellar\r\nmicrocircuit properties and it incorporates spike-based synaptic\r\nplasticity at multiple cerebellar sites. ...\"",
- "tags": [
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 1746,
- "tag": "EDLUT"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 589,
- "tag": "I L high threshold"
- },
- {
- "id": 580,
- "tag": "I M"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 749,
- "tag": "Long-term Synaptic Plasticity"
- },
- {
- "id": 655,
- "tag": "MATLAB"
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- "tag": "Vestibular"
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- "timestamp_created": "2024-01-12 18:41:41.572672+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/256140",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
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- "summary": "Temporal lobe epilepsy causes significant cognitive deficits in both humans and rodents, yet the specific circuit mechanisms underlying these deficits remain unknown. There are profound and selective interneuron death and axonal reorganization within the hippocampus of both humans and animal models of temporal lobe epilepsy.\r\nTo assess the specific contribution of these mechanisms on spatial coding, we developed a biophysically constrained network model of the CA1 region that consists of different subtypes of interneurons. More specifically, our network consists of 150 cells, 130 excitatory pyramidal cells and 20 interneurons (Fig. 1A). To simulate place cell formation in the network model, we generated grid cell and place cell inputs from the Entorhinal Cortex (ECLIII) and CA3 regions, respectively, activated in a realistic manner as observed when an animal transverses a linear track. Realistic place fields emerged in a subpopulation of pyramidal cells (40-50%), in which similar EC and CA3 grid cell inputs converged onto distal/proximal apical and basal dendrites. The tuning properties of these cells are very similar to the ones observed experimentally in awake, behaving animals\r\nTo examine the role of interneuron death and axonal reorganization in the formation and/or tuning properties of place fields we selectively varied the contribution of each interneuron type and desynchronized the two excitatory inputs. We found that desynchronized inputs were critical in reproducing the experimental data, namely the profound reduction in place cell numbers, stability and information content. These results demonstrate that the desynchronized firing of hippocampal neuronal populations contributes to poor spatial processing in epileptic mice, during behavior. Given the lack of experimental data on the selective contributions of interneuron death and axonal reorganization in spatial memory, our model findings predict the mechanistic effects of these alterations at the cellular and network levels.",
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- "id": 645,
- "tag": "Brian"
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- "timestamp_created": "2024-01-12 18:41:42.120449+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/256311",
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- "name": "Alleviating catastrophic forgetting: context gating and synaptic stabilization (Masse et al 2018)",
- "repository_type": "github",
- "summary": "\"Artificial neural networks can suffer from catastrophic forgetting, in which learning a new task causes the network to forget how to perform previous tasks. While previous studies have proposed various methods that can alleviate forgetting over small numbers (<10) of tasks, it is uncertain whether they can prevent forgetting across larger numbers of tasks. In this study, we propose a neuroscience-inspired scheme, called \u201ccontext-dependent gating,\u201d in which mostly nonoverlapping sets of units are active for any one task. Importantly, context-dependent gating has a straightforward implementation, requires little extra computational overhead, and when combined with previous methods to stabilize connection weights, can allow networks to maintain high performance across large numbers of sequentially presented tasks.\"",
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- "tag": "Learning"
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- "id": 564,
- "tag": "ModelDB"
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- "id": 2674,
- "tag": "ModelDB:256370"
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- "id": 853,
- "tag": "Python (web link to model)"
- },
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- "id": 809,
- "tag": "Reinforcement Learning"
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- "timestamp_created": "2024-01-12 18:41:42.695881+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/256370",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
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- "name": "The APP in C-terminal domain alters CA1 neuron firing (Pousinha et al 2019)",
- "repository_type": "github",
- "summary": "\"The amyloid precursor protein (APP) is central to AD pathogenesis and we recently showed that its intracellular domain (AICD) could modify synaptic signal integration. We now hypothezise that AICD modifies neuron firing activity, thus contributing to the disruption of memory processes. Using cellular, electrophysiological and behavioural techniques, we showed that pathological AICD levels weakens CA1 neuron firing activity through a gene transcription-dependent mechanism. Furthermore, increased AICD production in hippocampal neurons modifies oscillatory activity, specifically in the gamma frequency range, and disrupts spatial memory task. Collectively, our data suggest that AICD pathological levels, observed in AD mouse models and in human patients, might contribute to progressive neuron homeostatic failure, driving the shift from normal ageing to AD.\"",
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- {
- "id": 736,
- "tag": "Action Potentials"
- },
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- "id": 827,
- "tag": "Aging/Alzheimer`s"
- },
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- "id": 590,
- "tag": "I A"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 589,
- "tag": "I L high threshold"
- },
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- "id": 580,
- "tag": "I M"
- },
- {
- "id": 574,
- "tag": "I Na,t"
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- {
- "id": 594,
- "tag": "I h"
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- "id": 1433,
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- "tag": "Memory"
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- "timestamp_created": "2024-01-12 18:41:43.203606+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/256388",
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- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
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- "id": 2026,
- "name": "Bump Attractor Models: Delayed Response & Recognition Span - spatial condition (Ibanez et al 2019)",
- "repository_type": "github",
- "summary": "The archive contains examples of two spatial working memory tasks: the Delayed Response Task (DRT) or oculomotor task & the Delayed Recognition Span Task in the spatial condition (DRSTsp).\r\n",
- "tags": [
- {
- "id": 718,
- "tag": "Attractor Neural Network"
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- "id": 655,
- "tag": "MATLAB"
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- "id": 564,
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- "id": 2676,
- "tag": "ModelDB:256610"
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- "id": 794,
- "tag": "Working memory"
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- "timestamp_created": "2024-01-12 18:41:43.726026+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/256610",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "id": 2027,
- "name": "Modeling and MEG evidence of early consonance processing in auditory cortex (Tabas et al 2019)",
- "repository_type": "github",
- "summary": "Pitch is a fundamental attribute of auditory perception. The interaction of concurrent pitches gives rise to a sensation that can be characterized by its degree of consonance or dissonance. In this work, we propose that human auditory cortex (AC) processes pitch and consonance through a common neural network mechanism operating at early cortical levels. First, we developed a new model of neural ensembles incorporating realistic neuronal and synaptic parameters to assess pitch processing mechanisms at early stages of AC. Next, we designed a magnetoencephalography (MEG) experiment to measure the neuromagnetic activity evoked by dyads with varying degrees of consonance or dissonance. MEG results show that dissonant dyads evoke a pitch onset response (POR) with a latency up to 36 ms longer than consonant dyads. Additionally, we used the model to predict the processing time of concurrent pitches; here, consonant pitch combinations were decoded faster than dissonant combinations, in line with the experimental observations. Specifically, we found a striking match between the predicted and the observed latency of the POR as elicited by the dyads. These novel results suggest that consonance processing starts early in human auditory cortex and may share the network mechanisms that are responsible for (single) pitch processing.",
- "tags": [
- {
- "id": 655,
- "tag": "MATLAB"
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- "id": 851,
- "tag": "Magnetoencephalography"
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- "id": 2677,
- "tag": "ModelDB:256624"
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- "id": 620,
- "tag": "Python"
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- "timestamp_created": "2024-01-12 18:41:44.358781+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/256624",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "2028": {
- "auto_sync": true,
- "content_types": "modeling",
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- "default_context": "master",
- "id": 2028,
- "name": "Criticality,degeneracy in injury-induced changes in primary afferent excitability (Ratte et al 2014)",
- "repository_type": "github",
- "summary": "\"Neuropathic pain remains notoriously difficult to treat despite numerous drug targets. Here, we offer a novel explanation for this intractability. Computer simulations predicted that qualitative changes in primary afferent excitability linked to neuropathic pain arise through a switch in spike initiation dynamics when molecular pathologies reach a tipping point (criticality), and that this tipping point can be reached via several different molecular pathologies (degeneracy). ...\"",
- "tags": [
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- "id": 727,
- "tag": "Action Potential Initiation"
- },
- {
- "id": 576,
- "tag": "I K"
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- "id": 574,
- "tag": "I Na,t"
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- "id": 787,
- "tag": "Pathophysiology"
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- "tag": "XPPAUT"
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- "timestamp_created": "2024-01-12 18:41:45.073627+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/256627",
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- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "id": 2029,
- "name": "Origin of heterogeneous spiking patterns in spinal dorsal horn neurons (Balachandar & Prescott 2018)",
- "repository_type": "github",
- "summary": "\"Neurons are often classified by spiking pattern. Yet, some\r\nneurons exhibit distinct patterns under subtly different test\r\nconditions, which suggests that they operate near an abrupt\r\ntransition, or bifurcation. A set of such neurons may exhibit\r\nheterogeneous spiking patterns not because of qualitative\r\ndifferences in which ion channels they express, but rather\r\nbecause quantitative differences in expression levels cause\r\nneurons to operate on opposite sides of a bifurcation. Neurons in\r\nthe spinal dorsal horn, for example, respond to somatic current\r\ninjection with patterns that include tonic, single, gap, delayed\r\nand reluctant spiking. It is unclear whether these patterns\r\nreflect five cell populations (defined by distinct ion channel\r\nexpression patterns), heterogeneity within a single population,\r\nor some combination thereof. We reproduced all five spiking\r\npatterns in a computational model by varying the densities of a\r\nlow-threshold (KV1-type) potassium conductance and an\r\ninactivating (A-type) potassium conductance and found that\r\nsingle, gap, delayed and reluctant spiking arise when the joint\r\nprobability distribution of those channel densities spans two\r\nintersecting bifurcations that divide the parameter space into\r\nquadrants, each associated with a different spiking\r\npattern.\r\n...\r\n\"",
- "tags": [
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- "id": 727,
- "tag": "Action Potential Initiation"
- },
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 578,
- "tag": "Activity Patterns"
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- "id": 804,
- "tag": "Bifurcation"
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- "id": 590,
- "tag": "I A"
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- "id": 576,
- "tag": "I K"
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- "id": 584,
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- "tag": "ModelDB:256628"
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- "tag": "Parameter Fitting"
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- "tag": "Parameter sensitivity"
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- "timestamp_created": "2024-01-12 18:41:45.588138+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/256628",
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- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "id": 2030,
- "name": "DRG neuron models investigate how ion channel levels regulate firing properties (Zheng et al 2019)",
- "repository_type": "github",
- "summary": "We present computational models for an Abeta-LTMR (low-threshold mechanoreceptor) and a C-LTMR expressing four Na channels and four K channels to investigate how the expression level of Kv1 and Kv4 regulate number of spikes (repetitive firing) and onset latency to action potentials in Abeta-LTMRs and C-LTMRs, respectively. \r\n",
- "tags": [
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- "id": 727,
- "tag": "Action Potential Initiation"
- },
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- "id": 736,
- "tag": "Action Potentials"
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- "id": 578,
- "tag": "Activity Patterns"
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- "id": 754,
- "tag": "Delay"
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- "id": 590,
- "tag": "I A"
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- {
- "id": 576,
- "tag": "I K"
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- {
- "id": 584,
- "tag": "I Potassium"
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- "id": 582,
- "tag": "I Sodium"
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- {
- "id": 567,
- "tag": "Ion Channel Kinetics"
- },
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- "id": 2122,
- "tag": "Membrane Properties"
- },
- {
- "id": 564,
- "tag": "ModelDB"
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- "id": 2680,
- "tag": "ModelDB:256632"
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- "id": 577,
- "tag": "NEURON"
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- "id": 1754,
- "tag": "R"
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- "timestamp_created": "2024-01-12 18:41:46.133359+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/256632",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "2031": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 2031,
- "name": "Circadian rhythmicity shapes astrocyte morphology and neuronal function in CA1 (McCauley et al 2020)",
- "repository_type": "github",
- "summary": "Most animal species operate according to a 24-hour period set by the suprachiasmatic nucleus (SCN) of the hypothalamus. The rhythmic activity of the SCN modulates hippocampal-dependent memory, but the molecular and cellular mechanisms that account for this effect remain largely unknown. In McCauley et al. 2020 [1], we identify cell-type specific structural and functional changes that occur with circadian rhythmicity in neurons and astrocytes in hippocampal area CA1. Pyramidal neurons change the surface expression of NMDA receptors. Astrocytes change their proximity clustered excitatory synaptic inputs, ultimately shaping hippocampal-dependent learning in vivo. We identify to synapses. Together, these phenomena alter glutamate clearance, receptor activation and integration of temporally corticosterone as a key contributor to changes in synaptic strength. These findings highlight important mechanisms through which neurons and astrocytes modify the molecular composition and structure of the synaptic environment, contribute to the local storage of information in the hippocampus and alter the temporal dynamics of cognitive processing. \r\n\r\n[1] \"Circadian modulation of neurons and astrocytes controls synaptic plasticity in hippocampal area CA1\" by J.P. McCauley, M.A. Petroccione, L.Y. D\u2019Brant, G.C. Todd, N. Affinnih, J.J. Wisnoski, S. Zahid, S. Shree, A.A. Sousa, R.M. De Guzman, R. Migliore, A. Brazhe, R.D. Leapman, A. Khmaladze, A. Semyanov, D.G. Zuloaga, M. Migliore and A. Scimemi. \r\nCell Reports (2020), https://doi.org/10.1016/j.celrep.2020.108255\r\n",
- "tags": [
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- "id": 1684,
- "tag": "Ca pump"
- },
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 731,
- "tag": "I CAN"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 580,
- "tag": "I M"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 564,
- "tag": "ModelDB"
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- "id": 2681,
- "tag": "ModelDB:257027"
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- "id": 577,
- "tag": "NEURON"
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- {
- "id": 596,
- "tag": "Synaptic Integration"
- },
- {
- "id": 725,
- "tag": "Synaptic Plasticity"
- }
- ],
- "timestamp_created": "2024-01-12 18:41:46.718284+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/257027",
- "user": {
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- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "modeling"
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- "id": 2032,
- "name": "A cortico-cerebello-thalamo-cortical loop model under essential tremor (Zhang & Santaniello 2019)",
- "repository_type": "github",
- "summary": "We investigated the origins of oscillations under essential tremor (ET) by building a computational model of the cortico-cerebello-thalamo-cortical loop. It showed that an alteration of amplitudes and decay times of the GABAergic currents to the dentate nucleus can facilitate sustained oscillatory activity at tremor frequency throughout the network as well as a robust bursting activity in the thalamus, which is consistent with observations of thalamic tremor cells in ET patients. Tremor-related oscillations initiated in small neural populations and spread to a larger network as the \r\nsynaptic dysfunction increased, while thalamic high-frequency stimulation suppressed tremor-related activity in thalamus but increased the oscillation frequency in the olivocerebellar loop.",
- "tags": [
- {
- "id": 564,
- "tag": "ModelDB"
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- "id": 2682,
- "tag": "ModelDB:257028"
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- "tag": "NEURON"
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- "id": 585,
- "tag": "Oscillations"
- }
- ],
- "timestamp_created": "2024-01-12 18:41:47.256247+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/257028",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2033": {
- "auto_sync": true,
- "content_types": "modeling",
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- "modeling"
- ],
- "default_context": "master",
- "id": 2033,
- "name": "Respiratory central pattern generator (mammalian brainstem) (Rubin & Smith 2019)",
- "repository_type": "github",
- "summary": "This model includes a conditional respiratory pacemaker unit (representing the pre-Botzinger Complex), which can be tuned across oscillatory and non-oscillatory dynamic regimes in isolation, embedded into a full respiratory network. The work shows that under this embedding, the pacemaker unit's dynamics become masked: the network exhibits similar dynamical properties regardless of the conditional pacemaker node's tuning, and that node's outputs are dominated by\r\nnetwork influences.",
- "tags": [
- {
- "id": 739,
- "tag": "I Na,p"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2683,
- "tag": "ModelDB:257608"
- },
- {
- "id": 1536,
- "tag": "Respiratory control"
- },
- {
- "id": 759,
- "tag": "XPPAUT"
- }
- ],
- "timestamp_created": "2024-01-12 18:41:47.749833+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/257608",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "2034": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 2034,
- "name": "Learning spatiotemporal sequences using recurrent spiking NN that discretizes time (Maes et al 2020)",
- "repository_type": "github",
- "summary": "\"Learning to produce spatiotemporal sequences is a common task that the brain has to solve. The same neural substrate may be used by the brain to produce different sequential behaviours. The way the brain learns and encodes such tasks remains unknown as current computational models do not typically use realistic biologically-plausible learning. Here, we propose a model where a spiking recurrent network of excitatory and inhibitory biophysical neurons drives a read-out layer: the dynamics of the driver recurrent network is trained to encode time which is then mapped through the read-out neurons to encode another dimension, such as space or a phase. Different spatiotemporal patterns can be learned and encoded through the synaptic weights to the read-out neurons that follow common Hebbian learning rules. We demonstrate that the model is able to learn spatiotemporal dynamics on time scales that are behaviourally relevant and we show that the learned sequences are robustly replayed during a regime of spontaneous activity.\"",
- "tags": [
- {
- "id": 2684,
- "tag": "Julia"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2685,
- "tag": "ModelDB:257609"
- }
- ],
- "timestamp_created": "2024-01-12 18:41:48.232700+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/257609",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "2035": {
- "auto_sync": true,
- "content_types": "modeling",
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- "modeling"
- ],
- "default_context": "master",
- "id": 2035,
- "name": "An electrophysiological model of GABAergic double bouquet cells (Chrysanthidis et al. 2019)",
- "repository_type": "github",
- "summary": "We present an electrophysiological model of double bouquet cells (DBCs) and integrate them into an established cortical columnar microcircuit model that implements a BCPNN (Bayesian Confidence Propagation Neural Network) learning rule. The proposed architecture effectively solves the problem of duplexed learning of inhibition and excitation by replacing recurrent inhibition between pyramidal cells in functional columns of different stimulus selectivity with a plastic disynaptic pathway. The introduction of DBCs improves the biological plausibility of our model, without affecting the model's spiking activity, basic operation, and learning abilities.",
- "tags": [
- {
- "id": 825,
- "tag": "Learning"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2686,
- "tag": "ModelDB:257610"
- },
- {
- "id": 611,
- "tag": "NEST"
- }
- ],
- "timestamp_created": "2024-01-12 18:41:48.783041+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/257610",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2036": {
- "auto_sync": true,
- "content_types": "modeling",
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- "modeling"
- ],
- "default_context": "master",
- "id": 2036,
- "name": "Dynamical patterns underlying response properties of cortical circuits (Keane et al 2018)",
- "repository_type": "github",
- "summary": "\"Recent experimental studies show cortical circuit responses to external stimuli display varied dynamical properties. These include stimulus strength-dependent population response patterns, a shift from synchronous to asynchronous states and a decline in neural variability. To elucidate the mechanisms underlying these response properties and explore how they are mechanistically related, we develop a neural circuit model that incorporates two essential features widely observed in the cerebral cortex. The first feature is a balance between excitatory and inhibitory inputs to individual neurons; the second feature is distance-dependent connectivity. We show that applying a weak external stimulus to the model evokes a wave pattern propagating along lateral connections, but a strong external stimulus triggers a localized pattern; these stimulus strength-dependent population response patterns are quantitatively comparable with those measured in experimental studies. ...\"",
- "tags": [
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 776,
- "tag": "C or Cplusplus program (web link to model)"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2687,
- "tag": "ModelDB:257631"
- }
- ],
- "timestamp_created": "2024-01-12 18:41:49.358938+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/257631",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2037": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 2037,
- "name": "Phenomenological models of NaV1.5: Hodgkin-Huxley and kinetic formalisms (Andreozzi et al 2019)",
- "repository_type": "github",
- "summary": "\"Computational models of ion channels represent the building blocks of conductance-based, biologically inspired models of neurons and neural networks. Ion channels are still widely modelled by means of the formalism developed by the seminal work of Hodgkin and Huxley (HH), although the electrophysiological features of the channels are currently known to be better fitted by means of kinetic Markov-type models. The present study is aimed at showing why simplified Markov-type kinetic models are more suitable for ion channels modelling as compared to HH ones, and how a manual optimization process can be rationally carried out for both. ...\"",
- "tags": [
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 748,
- "tag": "Markov-type model"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2688,
- "tag": "ModelDB:257747"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 620,
- "tag": "Python"
- }
- ],
- "timestamp_created": "2024-01-12 18:41:49.891225+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/257747",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2038": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 2038,
- "name": "Optimal sparse olfactory representations persist in a plastic network (Assisi et al 2019)",
- "repository_type": "github",
- "summary": "\"Kenyon cells (KCs) of the mushroom body represent odors as a sparse code. When viewed from the perspective of follower neurons, mushroom body output neurons (MBONs) reveal an optimal level of coding sparseness that maximally separates the representations of odors. However, the KC\u2013MBON synapse is highly plastic and may be potentiated or depressed by odor\u2013driven experience that could, in turn, disrupt the optimality formed by pre\u2013synaptic circuits. Contrary to this expectation, we show that synaptic plasticity based on spike timing of pre- and postsynaptic neurons improves the ability of the system to distinguish between the representations of similar odors while preserving the optimality determined by pre\u2013synaptic circuits.\"",
- "tags": [
- {
- "id": 755,
- "tag": "C or Cplusplus program"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2689,
- "tag": "ModelDB:257877"
- }
- ],
- "timestamp_created": "2024-01-12 18:41:50.375132+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/257877",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2039": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 2039,
- "name": "A computational model of oxytocin modulation of olfactory recognition memory (Linster & Kelsch 2019)",
- "repository_type": "github",
- "summary": "Model of olfactory bulb (OB) and anterior olfactory nucleus (AON) pyramidal cells. Includes olfactory sensory neurons, mitral cells, periglomerular, external tufted and granule interneurons and pyramidal cells. Can be built to include a feedback loop between OB and AON. Output consists of voltage and spikes over time in all neurons. Model can be stimulated with simulated odorants. The code submitted here has served for a number of modeling explorations of olfactory bulb and cortex. \r\nThe model architecture is defined in \"bulb.dat\" with synapses defined in \"channels.dat\". The main function to run the model can be found in \"neuron.c\". Model architecture is constructed in \"set.c\" from types defined in \"sim.c\". A make file to create an executable is located in \"neuron.mak\".",
- "tags": [
- {
- "id": 755,
- "tag": "C or Cplusplus program"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2690,
- "tag": "ModelDB:257940"
- }
- ],
- "timestamp_created": "2024-01-12 18:41:50.890087+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/257940",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2040": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 2040,
- "name": "Dendritic spine geometry, spine apparatus organization: spatiotemporal Ca dynamics (Bell et al 2019)",
- "repository_type": "github",
- "summary": "\" ... we systematically investigated the relationship between the shape and size of both the spine head and spine apparatus, a specialized endoplasmic reticulum compartment within the spine head, in modulating rapid calcium dynamics using mathematical modeling. ...\"",
- "tags": [
- {
- "id": 1718,
- "tag": "COMSOL (web link to model)"
- },
- {
- "id": 572,
- "tag": "Calcium dynamics"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2691,
- "tag": "ModelDB:257965"
- },
- {
- "id": 1919,
- "tag": "Reaction-diffusion"
- },
- {
- "id": 751,
- "tag": "Signaling pathways"
- }
- ],
- "timestamp_created": "2024-01-12 18:41:51.395319+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/257965",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2041": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 2041,
- "name": "Inhibitory control of motoneuron excitability (Venugopal et al 2011)",
- "repository_type": "github",
- "summary": "A two-compartment model for a motor neuron following chronic spinal cord injury with excessive dendritic persistent Ca2+ current.",
- "tags": [
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2692,
- "tag": "ModelDB:258234"
- },
- {
- "id": 759,
- "tag": "XPPAUT"
- }
- ],
- "timestamp_created": "2024-01-12 18:41:51.899397+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/258234",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2042": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 2042,
- "name": "Resurgent Na+ current offers noise modulation in bursting neurons (Venugopal et al 2019)",
- "repository_type": "github",
- "summary": "\"Neurons utilize bursts of action potentials as an efficient and reliable way to encode information. It is likely that the intrinsic membrane properties of neurons involved in burst generation may also participate in preserving its temporal features. Here we examined the contribution of the persistent and resurgent components of voltage-gated Na+ currents in modulating the burst discharge in sensory neurons. Using mathematical modeling, theory and dynamic-clamp electrophysiology, we show that, distinct from the persistent Na+ component which is important for membrane resonance and burst generation, the resurgent Na+ can help stabilize burst timing features including the duration and intervals. ...\"",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 566,
- "tag": "Bursting"
- },
- {
- "id": 739,
- "tag": "I Na,p"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2693,
- "tag": "ModelDB:258235"
- }
- ],
- "timestamp_created": "2024-01-12 18:41:52.394237+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/258235",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2043": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 2043,
- "name": "Dynamics of sleep oscillations coupled to brain temperature on multiple scales (Csernai et al 2019)",
- "repository_type": "github",
- "summary": "\"Every form of neural activity depends on temperature, yet its\r\nrelationship to brain rhythms is poorly understood. In this work we\r\nexamined how sleep spindles are influenced by changing brain\r\ntemperatures and how brain temperature is influenced by sleep\r\noscillations. We employed a novel thermoelectrode designed for\r\nmeasuring temperature while recording neural activity. We found that\r\nspindle frequency is positively correlated and duration negatively\r\ncorrelated with brain temperature. Local heating of the thalamus\r\nreplicated the temperature dependence of spindle parameters in the\r\nheated area only, suggesting biophysical rather than global modulatory\r\nmechanisms, a finding also supported by a thalamic network\r\nmodel. Finally, we show that switches between oscillatory states also\r\ninfluence brain temperature on a shorter and smaller scale. Epochs of\r\nparadoxical sleep as well as the infra-slow oscillation were\r\nassociated with brain temperature fluctuations below 0.2\u00b0C. Our\r\nresults highlight that brain temperature is massively intertwined with\r\nsleep oscillations on various time scales.\"",
- "tags": [
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 1527,
- "tag": "Brain Rhythms"
- },
- {
- "id": 767,
- "tag": "MATLAB (web link to model)"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2694,
- "tag": "ModelDB:258478"
- },
- {
- "id": 743,
- "tag": "NEURON (web link to model)"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 592,
- "tag": "Sleep"
- },
- {
- "id": 1823,
- "tag": "Temperature"
- }
- ],
- "timestamp_created": "2024-01-12 18:41:52.925854+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/258478",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2044": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 2044,
- "name": "Paranoia as a deficit in non-social belief updating (Reed et al 2020)",
- "repository_type": "github",
- "summary": "Model fit to human and rodent data showing effects of paranoia and methamphetamine on behavior and model parameters.",
- "tags": [
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2695,
- "tag": "ModelDB:258631"
- },
- {
- "id": 2696,
- "tag": "Paranoia"
- },
- {
- "id": 1754,
- "tag": "R"
- }
- ],
- "timestamp_created": "2024-01-12 18:41:53.464762+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/258631",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2045": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 2045,
- "name": "Control of oscillations and spontaneous firing in dopamine neurons (Rumbell & Kozloski 2019)",
- "repository_type": "github",
- "summary": "Model of Substantia Nigra pars Compacta Dopamine Neuron.\r\n'Toy' morphology with 4 dendrites, one of which is the axon-bearing dendrite, with an axon branching from it. The axon is a short 'axon initial segment' compartment, followed by a longer 'axon'.\r\n727 parameter sets for ion channel conductance and kinetic parameters were found using evolutionary optimization, all of which are viable candidates representing a plausible model of a SNc DA.",
- "tags": [
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2697,
- "tag": "ModelDB:258643"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 2236,
- "tag": "Pacemaking mechanism"
- },
- {
- "id": 568,
- "tag": "Parameter Fitting"
- },
- {
- "id": 863,
- "tag": "Parameter sensitivity"
- }
- ],
- "timestamp_created": "2024-01-12 18:41:54.002122+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/258643",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2046": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 2046,
- "name": "In silico hippocampal modeling for multi-target pharmacotherapy in schizophrenia (Sherif et al 2020)",
- "repository_type": "github",
- "summary": "\"Using a hippocampal CA3 computer model with 1200 neurons, we examined the effects of alterations in NMDAR, HCN (Ih current), and GABAAR on information flow (measured with normalized transfer entropy), and in gamma activity in local field potential (LFP). We found that altering NMDARs, GABAAR, Ih, individually or in combination, modified information flow in an inverted-U shape manner, with information flow reduced at low and high levels of these parameters. Theta-gamma phase-amplitude coupling also had an inverted-U shape relationship with NMDAR augmentation. The strong information flow was associated with an intermediate level of synchrony, seen as an intermediate level of gamma activity in the LFP, and an intermediate level of pyramidal cell excitability\"",
- "tags": [
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2698,
- "tag": "ModelDB:258738"
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- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 845,
- "tag": "Schizophrenia"
- }
- ],
- "timestamp_created": "2024-01-12 18:41:54.587050+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/258738",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "id": 2047,
- "name": "GLMCC validation neural network model (Kobayashi et al. 2019)",
- "repository_type": "github",
- "summary": "Network model of two populations of randomly connected inhibitory and excitatory neurons to validate method for reconstructing the neural circuitry developed in \"Reconstructing Neuronal Circuitry from Parallel Spike Trains\" by Ryota Kobayashi, Shuhei Kurita, Anno Kurth, Katsunori Kitano, Kenji Mizuseki, Markus Diesmann, Barry J. Richmond and Shigeru Shinomoto.",
- "tags": [
- {
- "id": 756,
- "tag": "Methods"
- },
- {
- "id": 564,
- "tag": "ModelDB"
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- {
- "id": 2699,
- "tag": "ModelDB:258807"
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- "id": 611,
- "tag": "NEST"
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- ],
- "timestamp_created": "2024-01-12 18:41:55.074315+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/258807",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2048": {
- "auto_sync": true,
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- "modeling"
- ],
- "default_context": "master",
- "id": 2048,
- "name": "LFP in striatum (Tanaka & Nakamura 2019)",
- "repository_type": "github",
- "summary": "The numerical simulations of LFP generation by cortical pyramidal neuron and medium-sized spiny neurons.",
- "tags": [
- {
- "id": 734,
- "tag": "Extracellular Fields"
- },
- {
- "id": 2417,
- "tag": "LFPy"
- },
- {
- "id": 564,
- "tag": "ModelDB"
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- {
- "id": 2700,
- "tag": "ModelDB:258844"
- },
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- "id": 577,
- "tag": "NEURON"
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- {
- "id": 620,
- "tag": "Python"
- }
- ],
- "timestamp_created": "2024-01-12 18:41:55.708376+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/258844",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "default_context": "master",
- "id": 2049,
- "name": "Reaching movements with robust or stochastic optimal control models (Crevecoeur et al 2019)",
- "repository_type": "github",
- "summary": "\"We explored the hypothesis that compensation for unmodelled disturbances was supported\r\nby a robust neural control strategy. We studied the predictions of stochastic optimal control (LQG) (Linear Quadratic Gaussian) (Todorov, 2005) and a robust control design that can equivalently be described as a \u201cmin-max\u201d or\r\nworst-case strategy (Basar and Bernhard, 1991) applied to linear models of planar reaching\r\nmovements. The robust controller displayed an increase in control gains, resulting in faster\r\nmovements towards the target and more vigorous responses to perturbations. Our experimental\r\nresults supported these predictions: the occurrence of unexpected force field disturbances evoked\r\nboth faster movements and more vigorous responses to perturbations. Thus, the neural controller\r\nwas more robust in the sense that the feedback responses reduced the impact of the perturbations\r\n(step and force field). Thus the compensation for disturbances involved a \u201cmodel-free\u201d component.\r\n...\"",
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- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
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- {
- "id": 2701,
- "tag": "ModelDB:258846"
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- "id": 1966,
- "tag": "Motor control"
- }
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- "timestamp_created": "2024-01-12 18:44:56.843444+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/258846",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "content_types": "modeling",
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- "modeling"
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- "default_context": "master",
- "id": 2050,
- "name": "LCN-HippoModel: model of CA1 PCs deep-superficial theta firing dynamics (Navas-Olive et al 2020)",
- "repository_type": "github",
- "summary": "Using a biophysically realistic model of CA1 pyramidal cells together with a combination of single-cell and multisite electrophysiological recordings, we have studied factors underlying the internal theta phase preference of identified cell types from the dorsal CA1.\r\nWe found that perisomatic inhibition delivered by complementary populations of basket cells interacts with input pathways to shape phase-locked specificity of deep and superficial CA1 pyramidal cells. Somatodendritic integration of fluctuating glutamatergic inputs defined cycle-by-cycle by nested waveforms demonstrated that firing selection is tuneable across sublayers under the relevant influence of intrinsic factors. Our data identify a set of testable physiological mechanisms underlying a phase specific firing reservoir that can be repurposed for high-level flexible dynamical representations. Documentation in https://acnavasolive.github.io/LCN-HippoModel/. More info: http://hippo-circuitlab.es/",
- "tags": [
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 2702,
- "tag": "I C"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 589,
- "tag": "I L high threshold"
- },
- {
- "id": 580,
- "tag": "I M"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 575,
- "tag": "I T low threshold"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 1433,
- "tag": "I_AHP"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
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- "id": 2703,
- "tag": "ModelDB:258854"
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- {
- "id": 620,
- "tag": "Python"
- },
- {
- "id": 587,
- "tag": "Spatio-temporal Activity Patterns"
- }
- ],
- "timestamp_created": "2024-01-12 18:44:57.445369+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/258854",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2051": {
- "auto_sync": true,
- "content_types": "modeling",
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- "default_context": "master",
- "id": 2051,
- "name": "CA1 pyramidal neuron: nonlinear a5-GABAAR controls synaptic NMDAR activation (Schulz et al 2018)",
- "repository_type": "github",
- "summary": "The study shows that IPSCs mediated by a5-subunit containing GABAA receptors are strongly outward-rectifying generating 4-fold larger conductances above -50?mV than at rest. Experiments and modeling show that synaptic activation of these receptors can very effectively control voltage-dependent NMDA-receptor activation in a spatiotemporally controlled manner in fine dendrites of CA1 pyramidal cells.\r\n\r\nThe files contain the NEURON code for Fig.8, Fig.S8 and Fig.S9 of the paper. The model is based on the model published by Bloss et al., 2017. Physiological properties of GABA synapses were modified as determined by optogenetic activation of inputs during voltage-clamp recordings in Schulz et al. 2018. Other changes include stochastic synaptic release and short-term synaptic plasticity. All changes of mechanisms and parameters are detailed in the Methods of the paper.\r\n\r\nSimulation can be run by starting start_simulation.hoc after running mknrndll. The files that model the individual figures have to be uncommented in start_simulation.hoc beforehand.",
- "tags": [
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 564,
- "tag": "ModelDB"
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- "id": 2704,
- "tag": "ModelDB:258867"
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- "id": 577,
- "tag": "NEURON"
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- ],
- "timestamp_created": "2024-01-12 18:44:58.061755+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/258867",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2052": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 2052,
- "name": "Single compartment: nonlinear a5-GABAAR controls synaptic NMDAR activation (Schulz et al 2018)",
- "repository_type": "github",
- "summary": "This study shows that IPSCs mediated by a5-subunit containing GABAA receptors are strongly outward-rectifying generating 4-fold larger conductances above -50?mV than at rest. This model shows that synaptic activation of these receptors can very effectively control voltage-dependent NMDA-receptor activation.\r\n\r\nThe files contain the NEURON code for Fig.6 and Fig.7. The model is a single dendritic compartment with one glutamatergic and GABAergic synapse. Physiological properties of GABA synapses were modeled as determined by optogenetic activation of inputs during voltage-clamp recordings in Schulz et al. 2018. ",
- "tags": [
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2705,
- "tag": "ModelDB:258946"
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- "id": 577,
- "tag": "NEURON"
- }
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- "timestamp_created": "2024-01-12 18:44:59.089233+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/258946",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2053": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
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- "default_context": "master",
- "id": 2053,
- "name": "A computational model of systems memory consolidation and reconsolidation (Helfer & Shultz 2019)",
- "repository_type": "github",
- "summary": "A neural-network framework for modeling systems memory consolidation and reconsolidation.",
- "tags": [
- {
- "id": 755,
- "tag": "C or Cplusplus program"
- },
- {
- "id": 2436,
- "tag": "Memory"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2706,
- "tag": "ModelDB:258949"
- },
- {
- "id": 725,
- "tag": "Synaptic Plasticity"
- }
- ],
- "timestamp_created": "2024-01-12 18:44:59.624837+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/258949",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "2054": {
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- "modeling"
- ],
- "default_context": "master",
- "id": 2054,
- "name": "ELL Medium Ganglion cell (Muller et al 2019)",
- "repository_type": "github",
- "summary": "\"Distributing learning across multiple layers has proven extremely powerful in artificial neural networks. However, little is known about how multi-layer learning is implemented in the brain. Here, we provide an account of learning across multiple processing layers in the electrosensory lobe (ELL) of mormyrid fish and report how it solves problems well known from machine learning. Because the ELL operates and learns continuously, it must reconcile learning and signaling functions without switching its mode of operation. We show that this is accomplished through a functional compartmentalization within intermediate layer neurons in which inputs driving learning differentially affect dendritic and axonal spikes. We also find that connectivity based on learning rather than sensory response selectivity assures that plasticity at synapses onto intermediate-layer neurons is matched to the requirements of output neurons. The mechanisms we uncover have relevance to learning in the cerebellum, hippocampus, and cerebral cortex, as well as in artificial systems.\"",
- "tags": [
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2707,
- "tag": "ModelDB:259261"
- },
- {
- "id": 577,
- "tag": "NEURON"
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- "id": 620,
- "tag": "Python"
- }
- ],
- "timestamp_created": "2024-01-12 18:45:00.140160+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/259261",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2055": {
- "auto_sync": true,
- "content_types": "modeling",
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- "modeling"
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- "default_context": "master",
- "id": 2055,
- "name": "Cycle skipping in ING Type 1 / Type 2 networks (Tikidji-Hamburyan & Canavier 2020)",
- "repository_type": "github",
- "summary": "\"All-to-all homogeneous networks of inhibitory neurons synchronize completely under the right conditions; however, many modeling studies have shown that biological levels of heterogeneity disrupt synchrony. Our fundamental scientific question is \u201chow can neurons maintain partial synchrony in the presence of heterogeneity and noise?\u201d A particular subset of strongly interconnected interneurons, the PV+ fast spiking basket neurons, are strongly implicated in gamma oscillations and in phase locking of nested gamma oscillations to theta. Their excitability type apparently varies between brain regions: in CA1 and the dentate gyrus they have type 1 excitability, meaning that they can fire arbitrarily slowly, whereas in the striatum and cortex they have type 2 excitability, meaning that there is a frequency threshold below which they cannot sustain repetitive firing. We constrained the models to study the effect of excitability type (more precisely bifurcation type) in isolation from all other factors. We use sparsely connected, heterogeneous, noisy networks with synaptic delays to show that synchronization properties, namely the resistance to suppression and the strength of theta phase to gamma amplitude coupling, are strongly dependent on the pairing of excitability type with the type of inhibition. ...\"",
- "tags": [
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2708,
- "tag": "ModelDB:259366"
- },
- {
- "id": 577,
- "tag": "NEURON"
- }
- ],
- "timestamp_created": "2024-01-12 18:45:00.640907+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/259366",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "2056": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 2056,
- "name": "Neural Interactome: interactive simulation of a neuronal system (Kim et al 2019)",
- "repository_type": "github",
- "summary": "\"\"Connectivity and biophysical processes determine the functionality of\r\nneuronal networks. We, therefore, developed a real-time framework,\r\ncalled Neural Interactome, to simultaneously visualize and interact\r\nwith the structure and dynamics of such networks. Neural Interactome\r\nis a cross-platform framework, which combines graph visualization with\r\nthe simulation of neural dynamics, or experimentally recorded multi\r\nneural time series, to allow application of stimuli to neurons to\r\nexamine network responses. In addition, Neural Interactome supports\r\nstructural changes, such as disconnection of neurons from the network\r\n(ablation feature). Neural dynamics can be explored on a single neuron\r\nlevel (using a zoom feature), back in time (using a review feature),\r\nand recorded (using presets feature). The development of the Neural\r\nInteractome was guided by generic concepts to be applicable to\r\nneuronal networks with different neural connectivity and dynamics. We\r\nimplement the framework using a model of the nervous system of\r\nCaenorhabditis elegans (C. elegans) nematode, a model organism with\r\nresolved connectome and neural dynamics. We show that Neural\r\nInteractome assists in studying neural response patterns associated\r\nwith locomotion and other stimuli. In particular, we demonstrate how\r\nstimulation and ablation help in identifying neurons that shape\r\nparticular dynamics. We examine scenarios that were experimentally\r\nstudied, such as touch response circuit, and explore new scenarios\r\nthat did not undergo elaborate experimental studies.\"",
- "tags": [
- {
- "id": 855,
- "tag": "Connectivity matrix"
- },
- {
- "id": 729,
- "tag": "Invertebrate"
- },
- {
- "id": 756,
- "tag": "Methods"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2709,
- "tag": "ModelDB:259542"
- }
- ],
- "timestamp_created": "2024-01-12 18:45:01.173231+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/259542",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2057": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
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- "default_context": "master",
- "id": 2057,
- "name": "Inhibitory microcircuits for top-down plasticity of sensory representations (Wilmes & Clopath 2019)",
- "repository_type": "github",
- "summary": "\"Rewards influence plasticity of early sensory representations, but the underlying changes in circuitry are unclear. Recent experimental findings suggest that inhibitory circuits regulate learning. In addition, inhibitory neurons are highly modulated by diverse long-range inputs, including reward signals. We, therefore, hypothesise that inhibitory plasticity plays a major role in adjusting stimulus representations. We investigate how top-down modulation by rewards interacts with local plasticity to induce long-lasting changes in circuitry. Using a computational model of layer 2/3 primary visual cortex, we demonstrate how interneuron circuits can store information about rewarded stimuli to instruct long-term changes in excitatory connectivity in the absence of further reward. In our model, stimulus-tuned somatostatin-positive interneurons develop strong connections to parvalbumin-positive interneurons during reward such that they selectively disinhibit the pyramidal layer henceforth. This triggers excitatory plasticity, leading to increased stimulus representation. We make specific testable predictions and show that this two-stage model allows for translation invariance of the learned representation.\"",
- "tags": [
- {
- "id": 2255,
- "tag": "Brian 2"
- },
- {
- "id": 749,
- "tag": "Long-term Synaptic Plasticity"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2710,
- "tag": "ModelDB:259546"
- },
- {
- "id": 821,
- "tag": "Sensory coding"
- }
- ],
- "timestamp_created": "2024-01-12 18:45:01.793448+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/259546",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2058": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 2058,
- "name": "Inhibition perturbations reveals dynamical structure of neural processing (Sadeh & Clopath 2020)",
- "repository_type": "github",
- "summary": "\"Perturbation of neuronal activity is key to understanding the brain's functional properties, however, intervention studies typically perturb neurons in a nonspecific manner. Recent optogenetics techniques have enabled patterned perturbations, in which specific patterns of activity can be invoked in identified target neurons to reveal more specific cortical function. Here, we argue that patterned perturbation of neurons is in fact necessary to reveal the specific dynamics of inhibitory stabilization, emerging in cortical networks with strong excitatory and inhibitory functional subnetworks, as recently reported in mouse visual cortex. We propose a specific perturbative signature of these networks and investigate how this can be measured under different experimental conditions. Functionally, rapid spontaneous transitions between selective ensembles of neurons emerge in such networks, consistent with experimental results. Our study outlines the dynamical and functional properties of feature-specific inhibitory-stabilized networks, and suggests experimental protocols that can be used to detect them in the intact cortex.\"",
- "tags": [
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2711,
- "tag": "ModelDB:259620"
- }
- ],
- "timestamp_created": "2024-01-12 18:45:02.299331+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/259620",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "id": 2059,
- "name": "Distinct integration properties of noisy inputs in active dendritic subunits (Poleg-Polsky 2019)",
- "repository_type": "github",
- "summary": "The brain operates surprisingly well despite the noisy nature of individual neurons. The central mechanism for noise mitigation in the nervous system is thought to involve averaging over multiple noise-corrupted inputs. Subsequently, there has been considerable interest recently to identify noise structures that can be integrated linearly in a way that preserves reliable signal encoding. By analyzing realistic synaptic integration in biophysically accurate neuronal models, I report a complementary de-noising approach that is mediated by focal dendritic spikes. Dendritic spikes might seem to be unlikely candidates for noise reduction due to their miniscule integration compartments and poor averaging abilities. Nonetheless, the extra thresholding step introduced by dendritic spike generation increases neuronal tolerance for a broad category of noise structures, some of which cannot be resolved well with averaging. This property of active dendrites compensates for compartment size constraints and expands the repertoire of conditions that can be processed by neuronal populations.",
- "tags": [
- {
- "id": 579,
- "tag": "Active Dendrites"
- },
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- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
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- "id": 1478,
- "tag": "Information transfer"
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- "id": 564,
- "tag": "ModelDB"
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- "id": 2712,
- "tag": "ModelDB:259732"
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- "id": 577,
- "tag": "NEURON"
- },
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- "id": 596,
- "tag": "Synaptic Integration"
- }
- ],
- "timestamp_created": "2024-01-12 18:45:02.890110+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/259732",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "auto_sync": true,
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- "modeling"
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- "id": 2060,
- "name": "Respiratory central pattern generator including Kolliker-Fuse nucleus (Wittman et al 2019)",
- "repository_type": "github",
- "summary": "We present three highly reduced conductance-based models for the core of the respiratory CPG. All successfully simulate respiratory outputs across eupnoeic and vagotomized conditions and show that loss of inhibition to the pontine Kolliker-Fuse nucleus reproduces the key respiratory alterations associated with Rett syndrome.",
- "tags": [
- {
- "id": 739,
- "tag": "I Na,p"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2713,
- "tag": "ModelDB:259786"
- },
- {
- "id": 1536,
- "tag": "Respiratory control"
- },
- {
- "id": 759,
- "tag": "XPPAUT"
- }
- ],
- "timestamp_created": "2024-01-12 18:45:03.426093+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/259786",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "id": 2061,
- "name": "Multiscale model of primary motor cortex circuits predicts in vivo dynamics (Dura-Bernal et al 2023)",
- "repository_type": "github",
- "summary": "Understanding cortical function requires studying multiple scales: molecular, cellular, circuit and behavior. We developed a multiscale biophysically-detailed model of mouse primary motor cortex (M1) with over 10,000 neurons and 30 million synapses. Neuron types, densities, spatial distributions, morphologies, biophysics, connectivity and dendritic synapse locations were constrained by experimental data. The model includes long-range inputs from seven thalamic and cortical regions, and noradrenergic inputs. Connectivity depends on cell class and cortical depth at sublaminar resolution.\r\nThe model accurately predicted in vivo layer- and cell type-specific responses (firing rates and LFP) associated with behavioral states (quiet wakefulness and movement) and experimental manipulations (noradrenaline receptor blockade and thalamus inactivation). We generated mechanistic hypotheses underlying the observed activity and analyzed low-dimensional population latent dynamics.\r\nThis quantitative theoretical framework can be used to integrate and interpret M1 experimental data and sheds light on the cell type-specific multiscale dynamics associated with several experimental conditions and behaviors.\r\n\r\nPublication: Dura-Bernal S, Neymotin SA, Suter BA, Dacre J, Moreira JVS, Urdapilleta E, Schiemann J, Duguid I, Shepherd GMG, Lytton WW. \"Multiscale model of primary motor cortex circuits predicts in vivo cell type-specific, behavioral state-dependent dynamics.\" Cell Reports (In Press) \r\n",
- "tags": [
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 584,
- "tag": "I Potassium"
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- "id": 582,
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- "id": 564,
- "tag": "ModelDB"
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- {
- "id": 2714,
- "tag": "ModelDB:260015"
- },
- {
- "id": 1966,
- "tag": "Motor control"
- },
- {
- "id": 866,
- "tag": "Multiscale"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 659,
- "tag": "NetPyNE"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 1779,
- "tag": "Posture and locomotion"
- },
- {
- "id": 2715,
- "tag": "TASK channel"
- }
- ],
- "timestamp_created": "2024-01-12 18:45:03.925781+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/260015",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
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- "auto_sync": true,
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- ],
- "default_context": "master",
- "id": 2062,
- "name": "Dendritic action potentials and computation in human layer 2/3 cortical neurons (Gidon et al 2020)",
- "repository_type": "github",
- "summary": "Code for supplemental figure 12 in the paper.",
- "tags": [
- {
- "id": 565,
- "tag": "Dendritic Action Potentials"
- },
- {
- "id": 2318,
- "tag": "IK Bkca"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2716,
- "tag": "ModelDB:260178"
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- "id": 577,
- "tag": "NEURON"
- }
- ],
- "timestamp_created": "2024-01-12 18:45:04.443258+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/260178",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2063": {
- "auto_sync": true,
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- "modeling"
- ],
- "default_context": "master",
- "id": 2063,
- "name": "Signal fidelity in the rostral nucleus of the solitary tract (Boxwell et al 2018)",
- "repository_type": "github",
- "summary": "\"Neurons in the rostral nucleus of the solitary tract (rNST) convey taste information to both local circuits and pathways destined for forebrain structures. This nucleus is more than a simple relay, however, because rNST neurons differ in response rates and tuning curves relative to primary afferent fibers. To systematically study the impact of convergence and inhibition on firing frequency and breadth of tuning (BOT) in rNST, we constructed a mathematical model of its two major cell types: projection neurons and inhibitory neurons. First, we fit a conductance-based neuronal model to data derived from whole cell patch-clamp recordings of inhibitory and noninhibitory neurons in a mouse expressing Venus under the control of the VGAT promoter. We then used in vivo chorda tympani (CT) taste responses as afferent input to modeled neurons and assessed how the degree and type of convergence influenced model cell output frequency and BOT for comparison with in vivo gustatory responses from the rNST. Finally, we assessed how presynaptic and postsynaptic inhibition impacted model cell output. ...\"",
- "tags": [
- {
- "id": 765,
- "tag": "I Chloride"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 783,
- "tag": "I_Ks"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2717,
- "tag": "ModelDB:260190"
- },
- {
- "id": 768,
- "tag": "Synaptic Convergence"
- },
- {
- "id": 759,
- "tag": "XPPAUT"
- }
- ],
- "timestamp_created": "2024-01-12 18:45:04.996354+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/260190",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "2064": {
- "auto_sync": true,
- "content_types": "modeling",
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- ],
- "default_context": "master",
- "id": 2064,
- "name": "Two populations of excitatory neurons in the superficial retrosplenial cortex (Brennan et al 2020)",
- "repository_type": "github",
- "summary": "Hyperexcitable neurons enable precise and persistent information encoding in the superficial retrosplenial cortex",
- "tags": [
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 564,
- "tag": "ModelDB"
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- {
- "id": 2718,
- "tag": "ModelDB:260192"
- },
- {
- "id": 577,
- "tag": "NEURON"
- }
- ],
- "timestamp_created": "2024-01-12 18:45:05.490430+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/260192",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2065": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 2065,
- "name": "Hierarchical anti-Hebbian network model for the formation of spatial cells in 3D (Soman et al 2019)",
- "repository_type": "github",
- "summary": "This model shows how spatial representations in 3D space could emerge using unsupervised neural networks. Model is a hierarchical one which means that it has multiple layers, where each layer has got a specific function to achieve. This architecture is more of a generalised one i.e. it gives rise to different kinds of spatial representations after training. ",
- "tags": [
- {
- "id": 825,
- "tag": "Learning"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2719,
- "tag": "ModelDB:260210"
- },
- {
- "id": 800,
- "tag": "Spatial Navigation"
- },
- {
- "id": 803,
- "tag": "Unsupervised Learning"
- }
- ],
- "timestamp_created": "2024-01-12 18:45:05.986316+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/260210",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2066": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
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- ],
- "default_context": "master",
- "id": 2066,
- "name": "Large scale neocortical model for PGENESIS (Crone et al 2019)",
- "repository_type": "github",
- "summary": "This is model code for a large scale neocortical model based on Traub et al. (2005), modified to run on PGENESIS on supercomputing resources. \"In this paper (Crone et al 2019), we evaluate the computational performance of the GEneral NEural SImulation System (GENESIS) for large scale simulations of neural networks. While many benchmark studies have been performed for large scale simulations with leaky integrate-and-fire neurons or neuronal models with only a few compartments, this work focuses on higher fidelity neuronal models represented by 50\u201374 compartments per neuron. ...\"",
- "tags": [
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 734,
- "tag": "Extracellular Fields"
- },
- {
- "id": 600,
- "tag": "GENESIS"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 582,
- "tag": "I Sodium"
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- "id": 756,
- "tag": "Methods"
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- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2720,
- "tag": "ModelDB:260267"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 1553,
- "tag": "PGENESIS"
- }
- ],
- "timestamp_created": "2024-01-12 18:45:06.688795+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/260267",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "2067": {
- "auto_sync": true,
- "content_types": "modeling",
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- ],
- "default_context": "main",
- "id": 2067,
- "name": "Robust and tunable bursting requires slow positive feedback (Franci et al 2018)",
- "repository_type": "github",
- "summary": "\"We highlight that the robustness and tunability of a bursting model critically rely on currents that provide slow positive feedback to the membrane potential. Such currents have the ability to make the total conductance of the circuit negative in a timescale that is termed \u201cslow\u201d because it is intermediate between the fast timescale of the spike upstroke and the ultraslow timescale of even slower adaptation currents. We discuss how such currents can be assessed either in voltage-clamp experiments or in computational models. We show that, while frequent in the literature, mathematical and computational models of bursting that lack the slow negative conductance are fragile and rigid. Our results suggest that modeling the slow negative conductance of cellular models is important when studying the neuromodulation of rhythmic circuits at any broader scale.\"",
- "tags": [
- {
- "id": 804,
- "tag": "Bifurcation"
- },
- {
- "id": 566,
- "tag": "Bursting"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 589,
- "tag": "I L high threshold"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 575,
- "tag": "I T low threshold"
- },
- {
- "id": 2664,
- "tag": "Julia (web link to model)"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2721,
- "tag": "ModelDB:260596"
- },
- {
- "id": 720,
- "tag": "Temporal Pattern Generation"
- }
- ],
- "timestamp_created": "2024-01-12 18:45:07.224190+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/260596",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2068": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 2068,
- "name": "Retinal ganglion cells responses and activity (Tsai et al 2012, Guo et al 2016)",
- "repository_type": "github",
- "summary": "From the abstracts: \"Retinal ganglion cells (RGCs), which survive in large numbers following neurodegenerative diseases, could be stimulated with extracellular electric pulses to elicit artificial percepts. How do the RGCs respond to electrical stimulation at the sub-cellular level under different stimulus configurations, and how does this influence the whole-cell response? At the population level, why have experiments yielded conflicting evidence regarding the extent of passing axon activation? We addressed these questions through simulations of morphologically and biophysically detailed computational RGC models on high performance computing clusters. We conducted the analyses on both large-field RGCs and small-field midget RGCs. ...\", \"... In this study, an existing RGC ionic model was extended by including a hyperpolarization activated non-selective cationic current as well as a T-type calcium current identified in recent experimental findings. Biophysically-defined model parameters were simultaneously optimized against multiple experimental recordings from ON and OFF RGCs. ...",
- "tags": [
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 793,
- "tag": "Development"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2722,
- "tag": "ModelDB:260653"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- }
- ],
- "timestamp_created": "2024-01-12 18:45:07.738139+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/260653",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2069": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 2069,
- "name": "How adaptation makes low firing rates robust (Sherman & Ha 2017)",
- "repository_type": "github",
- "summary": "\"Low frequency firing is modeled by Type 1 neurons with a SNIC (saddle node on an invariant circle), but, because of the vertical slope of the square-root-like f\u2013I curve, low f only occurs over a narrow range of I. When an adaptive current is added, however, the f\u2013I curve is linearized, and low f occurs robustly over a large I range. Ermentrout (Neural Comput. 10(7):1721-1729, 1998) showed that this feature of adaptation paradoxically arises from the SNIC that is responsible for the vertical slope. We show, using a simplified Hindmarsh\u2013Rose neuron with negative feedback acting directly on the adaptation current, that whereas a SNIC contributes to linearization, in practice linearization over a large interval may require strong adaptation strength. We also find that a type 2 neuron with threshold generated by a Hopf bifurcation can also show linearization if adaptation strength is strong. Thus, a SNIC is not necessary. More fundamental than a SNIC is stretching the steep region near threshold, which stems from sufficiently strong adaptation, though a SNIC contributes if present. In a more realistic conductance-based model, Morris\u2013Lecar, with negative feedback acting on the adaptation conductance, an additional assumption that the driving force of the adaptation current is independent of I is needed. If this holds, strong adaptive conductance is both necessary and sufficient for linearization of f\u2013I curves of type 2 f\u2013I curves.\"",
- "tags": [
- {
- "id": 804,
- "tag": "Bifurcation"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2723,
- "tag": "ModelDB:260730"
- },
- {
- "id": 759,
- "tag": "XPPAUT"
- }
- ],
- "timestamp_created": "2024-01-12 18:45:08.341800+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/260730",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2070": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 2070,
- "name": "Neural field model to reconcile structure with function in V1 (Rankin & Chavane 2017)",
- "repository_type": "github",
- "summary": "\"Voltage-sensitive dye imaging experiments in primary visual cortex (V1) have shown that local, oriented visual stimuli elicit stable orientation-selective activation within the stimulus retinotopic footprint. The cortical activation dynamically extends far beyond the retinotopic footprint, but the peripheral spread stays non-selective\u2014a surprising finding given a number of anatomo-functional studies showing the orientation specificity of long-range connections. Here we use a computational model to investigate this apparent discrepancy by studying the expected population response using known published anatomical constraints. The dynamics of input-driven localized states were simulated in a planar neural field model with multiple sub-populations encoding orientation. The realistic connectivity profile has parameters controlling the clustering of long-range connections and their orientation bias. We found substantial overlap between the anatomically relevant parameter range and a steep decay in orientation selective activation that is consistent with the imaging experiments. In this way our study reconciles the reported orientation bias of long-range connections with the functional expression of orientation selective neural activity. Our results demonstrate this sharp decay is contingent on three factors, that long-range connections are sufficiently diffuse, that the orientation bias of these connections is in an intermediate range (consistent with anatomy) and that excitation is sufficiently balanced by inhibition. Conversely, our modelling results predict that, for reduced inhibition strength, spurious orientation selective activation could be generated through long-range lateral connections. Furthermore, if the orientation bias of lateral connections is very strong, or if inhibition is particularly weak, the network operates close to an instability leading to unbounded cortical activation. ...\"",
- "tags": [
- {
- "id": 793,
- "tag": "Development"
- },
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- "id": 767,
- "tag": "MATLAB (web link to model)"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2724,
- "tag": "ModelDB:260740"
- },
- {
- "id": 1569,
- "tag": "Orientation selectivity"
- }
- ],
- "timestamp_created": "2024-01-12 18:45:09.128693+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/260740",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "2071": {
- "auto_sync": true,
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- "modeling"
- ],
- "default_context": "master",
- "id": 2071,
- "name": "Mechanisms for pattern specificity of DBS in Parkinson's disease (Velarde et al 2017)",
- "repository_type": "github",
- "summary": "Mechanisms for pattern specificity of DBS in Parkinson's disease (Velarde et al 2017)",
- "tags": [
- {
- "id": 755,
- "tag": "C or Cplusplus program"
- },
- {
- "id": 831,
- "tag": "Deep brain stimulation"
- },
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2725,
- "tag": "ModelDB:260949"
- },
- {
- "id": 801,
- "tag": "Parkinson's"
- },
- {
- "id": 787,
- "tag": "Pathophysiology"
- }
- ],
- "timestamp_created": "2024-01-12 18:45:09.618692+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/260949",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "2072": {
- "auto_sync": true,
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- "modeling"
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- "default_context": "master",
- "id": 2072,
- "name": "Thalamocortical control of propofol phase-amplitude coupling (Soplata et al 2017)",
- "repository_type": "github",
- "summary": "\"The anesthetic propofol elicits many different spectral properties on the EEG, including alpha oscillations (8-12 Hz), Slow Wave Oscillations (SWO, 0.1-1.5 Hz), and dose-dependent phase-amplitude coupling (PAC) between alpha and SWO. Propofol is known to increase GABAA inhibition and decrease H-current strength, but how it generates these rhythms and their interactions is still unknown. To investigate both generation of the alpha rhythm and its PAC to SWO, we simulate a Hodgkin-Huxley network model of a hyperpolarized thalamus and corticothalamic inputs. ...\"",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 2726,
- "tag": "DynaSim"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2727,
- "tag": "ModelDB:260960"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- }
- ],
- "timestamp_created": "2024-01-12 18:45:10.135919+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/260960",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2073": {
- "auto_sync": true,
- "content_types": "modeling",
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- "modeling"
- ],
- "default_context": "master",
- "id": 2073,
- "name": "Double cable myelinated axon (Layer 5 pyramidal neuron; Cohen et al 2020)",
- "repository_type": "github",
- "summary": "The periaxonal space in myelinated axons is conductive (~50 ohm cm). Together with a rapidly charging myelin sheath and relatively sealed paranodes, periaxonal conduction shapes the saltating voltage profiles of transaxonal (Vm), transmyelin (Vmy) and transfibre (Vmym) potentials. This model exemplifies double cable saltatory conduction across both time and space, and is the same cell (#6) as seen in Movie S4 of Cohen et al. 2020. This model version allows one to visualize and manipulate the controlling parameters of a propagating action potential.\r\n\r\nFurther notes: The corresponding potentials in NEURON to those named above are v, vext (or vext[0]) and v+vext, respectively. The loaded biophysical parameters were those optimized for this cell (Cohen et al. 2020).",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 579,
- "tag": "Active Dendrites"
- },
- {
- "id": 728,
- "tag": "Axonal Action Potentials"
- },
- {
- "id": 1684,
- "tag": "Ca pump"
- },
- {
- "id": 1606,
- "tag": "Conductance distributions"
- },
- {
- "id": 1983,
- "tag": "Conductances estimation"
- },
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 2728,
- "tag": "Double cable"
- },
- {
- "id": 786,
- "tag": "Electrotonus"
- },
- {
- "id": 734,
- "tag": "Extracellular Fields"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 591,
- "tag": "I K,leak"
- },
- {
- "id": 589,
- "tag": "I L high threshold"
- },
- {
- "id": 580,
- "tag": "I M"
- },
- {
- "id": 739,
- "tag": "I Na,p"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 575,
- "tag": "I T low threshold"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 2122,
- "tag": "Membrane Properties"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2729,
- "tag": "ModelDB:260967"
- },
- {
- "id": 735,
- "tag": "Multiple sclerosis"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 863,
- "tag": "Parameter sensitivity"
- }
- ],
- "timestamp_created": "2024-01-12 18:45:10.711458+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/260967",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2074": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 2074,
- "name": "Biochemically detailed model of LTP and LTD in a cortical spine (Maki-Marttunen et al 2020)",
- "repository_type": "github",
- "summary": "\"Signalling pathways leading to post-synaptic plasticity have been examined in many types of experimental studies, but a unified picture on how multiple biochemical pathways collectively shape neocortical plasticity is missing. We built a biochemically detailed model of post-synaptic plasticity describing CaMKII, PKA, and PKC pathways and their contribution to synaptic potentiation or depression. We developed a statistical AMPA-receptor-tetramer model, which permits the estimation of the AMPA-receptor-mediated maximal synaptic conductance based on numbers of GluR1s and GluR2s predicted by the biochemical signalling model. We show that our model reproduces neuromodulator-gated spike-timing-dependent plasticity as observed in the visual cortex and can be fit to data from many cortical areas, uncovering the biochemical contributions of the pathways pinpointed by the underlying experimental studies. Our model explains the dependence of different forms of plasticity on the availability of different proteins and can be used for the study of mental disorder-associated impairments of cortical plasticity.\"",
- "tags": [
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 749,
- "tag": "Long-term Synaptic Plasticity"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2730,
- "tag": "ModelDB:260971"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 1542,
- "tag": "NeuroRD"
- }
- ],
- "timestamp_created": "2024-01-12 18:45:11.337572+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/260971",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2075": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 2075,
- "name": "Temperature sensitive axon models (DeMaegd & Stein 2020)",
- "repository_type": "github",
- "summary": "Temperature sensitive axon models (DeMaegd & Stein 2020)",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 745,
- "tag": "Conduction failure"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2731,
- "tag": "ModelDB:260972"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 1823,
- "tag": "Temperature"
- }
- ],
- "timestamp_created": "2024-01-12 18:45:11.920709+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/260972",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2076": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 2076,
- "name": "Reducing variability in motor cortex activity by GABA (Hoshino et al. 2019)",
- "repository_type": "github",
- "summary": "Interaction between sensory and motor cortices is crucial for perceptual decision-making, in which intracortical inhibition might have an important role. We simulated a neural network model consisting of a sensory network (NS) and a motor network (NM) to elucidate the significance of their interaction in perceptual decision-making in association with the level of GABA in extracellular space: extracellular GABA concentration. Extracellular GABA molecules acted on extrasynaptic receptors embedded in membranes of pyramidal cells and suppressed them. A reduction in extracellular GABA concentration either in NS or NM increased the rate of errors in perceptual decision-making, for which an increase in ongoing-spontaneous fluctuations in subthreshold neuronal activity in NM prior to sensory stimulation was responsible. Feedback (NM-to-NS) signaling enhanced selective neuronal responses in NS, which in turn increased stimulus-evoked neuronal activity in NM. We suggest that GABA in extracellular space contributes to reducing variability in motor cortex activity at a resting state\r\nand thereby the motor cortex can respond correctly to a subsequent sensory stimulus. Feedback signaling from the motor cortex improves the selective responsiveness of the sensory cortex, which ensures the fidelity of information transmission to the motor cortex, leading to reliable perceptual decision-making.",
- "tags": [
- {
- "id": 755,
- "tag": "C or Cplusplus program"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2732,
- "tag": "ModelDB:261078"
- }
- ],
- "timestamp_created": "2024-01-12 18:45:12.397900+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/261078",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2077": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 2077,
- "name": "ACnet23 primary auditory cortex model (Beeman et al 2019)",
- "repository_type": "github",
- "summary": "These scripts were used to model a patch of layer 2/3 primary auditory cortex,\r\nmaking use of the the improvements to PGENESIS by Crone, et al. (2019).\r\nThis single layer model contains a 48 x 48 grid of pyramidal cells (PCs)\r\nand a 24 x 24 grid of basket cells (BCs). The reduced PC models have 17\r\ncompartments with dimensions and passive properties that were fit to human\r\ncortical PC reconstructions. This parallel version of the simulation was used\r\nby Beeman, et al. (2019) to understand the effects of inhibition of PCs by\r\nBCs on auditory evoked potentials.\r\n",
- "tags": [
- {
- "id": 600,
- "tag": "GENESIS"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2733,
- "tag": "ModelDB:261423"
- },
- {
- "id": 1553,
- "tag": "PGENESIS"
- }
- ],
- "timestamp_created": "2024-01-12 18:45:12.913677+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/261423",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2078": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 2078,
- "name": "Repetitive Action Potential Firing (Knowlton et al. 2020)",
- "repository_type": "github",
- "summary": "Repetitive Action Potential Firing (Knowlton et al. 2020)",
- "tags": [
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2734,
- "tag": "ModelDB:261435"
- },
- {
- "id": 577,
- "tag": "NEURON"
- }
- ],
- "timestamp_created": "2024-01-12 18:45:13.466570+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/261435",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2079": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 2079,
- "name": "Peripheral nerve:Morris-Lecar implementation of (Schwarz et al 1995)",
- "repository_type": "github",
- "summary": "This is a Morris-Lecar version of the model in Schwarz et al 1995. The original model in the paper was implemented in the Hodgkin-Huxley style.",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 1532,
- "tag": "I Na, leak"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2735,
- "tag": "ModelDB:261436"
- }
- ],
- "timestamp_created": "2024-01-12 18:45:13.943470+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/261436",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2080": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 2080,
- "name": "Mice Somatosensory L2/3 Pyramidal cells (Iascone et al 2020)",
- "repository_type": "github",
- "summary": "Mice L2/3 pyramidal cells with full excitatory and inhibitory synaptic maps (Models used in Whole-neuron synaptic mapping reveals local balance between excitatory and inhibitory synapse organization - Iascone et at 2020)",
- "tags": [
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2736,
- "tag": "ModelDB:261460"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 1584,
- "tag": "Synaptic-input statistic"
- }
- ],
- "timestamp_created": "2024-01-12 18:45:14.429383+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/261460",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2081": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 2081,
- "name": "Striatal FSI and SPN oscillation model (Chartove et al. 2020)",
- "repository_type": "github",
- "summary": "Our model consists of three interconnected populations of single or double compartment Hodgkin-Huxley neurons: a feedforward network of FSIs, and two networks of SPNs (the D1 receptor-expressing \"direct pathway\" subnetwork and the D2 receptor-expressing \"indirect pathway\" subnetwork).",
- "tags": [
- {
- "id": 2042,
- "tag": "Beta oscillations"
- },
- {
- "id": 2726,
- "tag": "DynaSim"
- },
- {
- "id": 1799,
- "tag": "Gamma oscillations"
- },
- {
- "id": 580,
- "tag": "I M"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2737,
- "tag": "ModelDB:261461"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 2384,
- "tag": "Theta oscillations"
- }
- ],
- "timestamp_created": "2024-01-12 18:45:14.928142+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/261461",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2082": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 2082,
- "name": "Within movement adjustments of internal representations during reaching (Crevecoeur et al 2020)",
- "repository_type": "github",
- "summary": "\"An important function of the nervous system is to adapt motor commands in anticipation of predictable disturbances, which supports motor learning when we move in novel environments such as force fields (FFs). Here, we show that movement control when exposed to unpredictable disturbances exhibit similar traits: motor corrections become tuned to the FF, and they evoke after effects within an ongoing sequence of movements. We propose and discuss the framework of adaptive control to explain these results: a real-time learning algorithm, which complements feedback control in the presence of model errors. This candidate model potentially links movement control and trial-by-trial adaptation of motor commands.\"",
- "tags": [
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2738,
- "tag": "ModelDB:261466"
- }
- ],
- "timestamp_created": "2024-01-12 18:45:15.435164+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/261466",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2083": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 2083,
- "name": "Coding explains development of binocular vision and its failure in Amblyopia (Eckmann et al 2020)",
- "repository_type": "github",
- "summary": "This is the MATLAB code for the Active Efficient Coding model introduced in Eckmann et al 2020.\r\nIt simulates an agent that self-calibrates vergence and accommodation eye movements in a simple visual environment. All algorithms are explained in detail in the main manuscript and the supplementary material of the paper.",
- "tags": [
- {
- "id": 771,
- "tag": "Action Selection/Decision Making"
- },
- {
- "id": 2739,
- "tag": "Amblyopia"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2740,
- "tag": "ModelDB:261483"
- },
- {
- "id": 809,
- "tag": "Reinforcement Learning"
- },
- {
- "id": 803,
- "tag": "Unsupervised Learning"
- }
- ],
- "timestamp_created": "2024-01-12 18:45:15.973138+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/261483",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2084": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 2084,
- "name": "Computational model of the distributed representation of operant reward memory (Costa et al. 2020)",
- "repository_type": "github",
- "summary": "Operant reward learning of feeding behavior in Aplysia increases the frequency and regularity of biting, as well as biases\r\nbuccal motor patterns (BMPs) toward ingestion-like BMPs (iBMPs). The engram underlying this memory comprises cells\r\nthat are part of a central pattern generating (CPG) circuit and includes increases in the intrinsic excitability of identified\r\ncells B30, B51, B63, and B65, and increases in B63\u2013B30 and B63\u2013B65 electrical synaptic coupling. To examine the ways in\r\nwhich sites of plasticity (individually and in combination) contribute to memory expression, a model of the CPG was developed.\r\nThe model included conductance-based descriptions of cells CBI-2, B4, B8, B20, B30, B31, B34, B40, B51, B52, B63,\r\nB64, and B65, and their synaptic connections. The model generated patterned activity that resembled physiological BMPs,\r\nand implementation of the engram reproduced increases in frequency, regularity, and bias. Combined enhancement of\r\nB30, B63, and B65 excitabilities increased BMP frequency and regularity, but not bias toward iBMPs. Individually, B30 increased\r\nregularity and bias, B51 increased bias, B63 increased frequency, and B65 decreased all three BMP features.\r\nCombined synaptic plasticity contributed primarily to regularity, but also to frequency and bias. B63\u2013B30 coupling contributed\r\nto regularity and bias, and B63\u2013B65 coupling contributed to all BMP features. Each site of plasticity altered multiple\r\nBMP features simultaneously. Moreover, plasticity loci exhibited mutual dependence and synergism. These results indicate\r\nthat the memory for operant reward learning emerged from the combinatoric engagement of multiple sites of plasticity.",
- "tags": [
- {
- "id": 729,
- "tag": "Invertebrate"
- },
- {
- "id": 2436,
- "tag": "Memory"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2741,
- "tag": "ModelDB:261489"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 757,
- "tag": "SNNAP"
- },
- {
- "id": 720,
- "tag": "Temporal Pattern Generation"
- }
- ],
- "timestamp_created": "2024-01-12 18:45:16.469144+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/261489",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2085": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 2085,
- "name": "Generation of stable heading representations in diverse visual scenes (Kim et al 2019)",
- "repository_type": "github",
- "summary": "\"Many animals rely on an internal heading representation when\r\nnavigating in varied environments. How this\r\nrepresentation is linked to the sensory cues that define different\r\nsurroundings is unclear. In the fly brain, heading is represented by\r\n\u2018compass\u2019 neurons that innervate a ring-shaped structure known as the\r\nellipsoid body. Each compass neuron receives inputs from \u2018ring\u2019\r\nneurons that are selective for particular visual features;\r\nthis combination provides an ideal substrate for the extraction of\r\ndirectional information from a visual scene. Here we combine\r\ntwo-photon calcium imaging and optogenetics in tethered flying flies\r\nwith circuit modelling, and show how the correlated activity of\r\ncompass and visual neurons drives plasticity, which\r\nflexibly transforms two-dimensional visual cues into a stable heading\r\nrepresentation. ... \"\r\nSee the supplementary information for model details.",
- "tags": [
- {
- "id": 718,
- "tag": "Attractor Neural Network"
- },
- {
- "id": 808,
- "tag": "Hebbian plasticity"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2742,
- "tag": "ModelDB:261585"
- },
- {
- "id": 800,
- "tag": "Spatial Navigation"
- },
- {
- "id": 725,
- "tag": "Synaptic Plasticity"
- }
- ],
- "timestamp_created": "2024-01-12 18:45:17.019419+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/261585",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2086": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 2086,
- "name": "Cortico - Basal Ganglia Loop (Mulcahy et al 2020)",
- "repository_type": "github",
- "summary": "The model represents learning and reversal tasks and shows performance in control, Parkinsonian and Huntington disease conditions",
- "tags": [
- {
- "id": 771,
- "tag": "Action Selection/Decision Making"
- },
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 831,
- "tag": "Deep brain stimulation"
- },
- {
- "id": 1410,
- "tag": "Huntington's"
- },
- {
- "id": 825,
- "tag": "Learning"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2743,
- "tag": "ModelDB:261616"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 801,
- "tag": "Parkinson's"
- },
- {
- "id": 791,
- "tag": "Rate-coding model neurons"
- }
- ],
- "timestamp_created": "2024-01-12 18:45:17.535497+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/261616",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2087": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 2087,
- "name": "A NN with synaptic depression for testing the effects of connectivity on dynamics (Jacob et al 2019)",
- "repository_type": "github",
- "summary": "Here we used a 10,000 neuron model. The neurons are a mixture of excitatory and inhibitory integrate-and-fire neurons connected with synapses that exhibit synaptic depression. Three different connectivity paradigms were tested to look for spontaneous transition between interictal spiking and seizure: uniform, small-world network, and scale-free. All three model types are included here.",
- "tags": [
- {
- "id": 755,
- "tag": "C or Cplusplus program"
- },
- {
- "id": 855,
- "tag": "Connectivity matrix"
- },
- {
- "id": 469,
- "tag": "Epilepsy"
- },
- {
- "id": 861,
- "tag": "I_K,Na"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2744,
- "tag": "ModelDB:261623"
- }
- ],
- "timestamp_created": "2024-01-12 18:45:18.139987+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/261623",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2088": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 2088,
- "name": "Basal Ganglia and Levodopa Pharmacodynamics model for parameter estimation in PD (Ursino et al 2020)",
- "repository_type": "github",
- "summary": "Parkinson disease (PD) is characterized by a clear beneficial motor response to levodopa (LD) treatment. However, with disease progression and longer LD exposure, drug-related motor fluctuations usually occur. Recognition of the individual relationship between LD concentration and its effect may be difficult, due to the complexity and variability of the mechanisms involved. This work proposes an innovative procedure for the automatic estimation of LD pharmacokinetics and pharmacodynamics parameters, by a biologically-inspired mathematical model. An original issue, compared with previous similar studies, is that the model comprises not only a compartmental description of LD pharmacokinetics in plasma and its effect on the striatal neurons, but also a neurocomputational model of basal ganglia action selection. Parameter estimation was achieved on 26 patients (13 with stable and 13 with fluctuating LD response) to mimic plasma LD concentration and alternate finger tapping frequency along four hours after LD administration, automatically minimizing a cost function of the difference between simulated and clinical data points. Results show that individual data can be satisfactorily simulated in all patients and that significant differences exist in the estimated parameters between the two groups. Specifically, the drug removal rate from the effect compartment, and the Hill coefficient of the concentration-effect relationship were significantly higher in the fluctuating than in the stable group. \r\nThe model, with individualized parameters, may be used to reach a deeper comprehension of the PD mechanisms, mimic the effect of medication, and, based on the predicted neural responses, plan the correct management and design innovative therapeutic procedures.",
- "tags": [
- {
- "id": 808,
- "tag": "Hebbian plasticity"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2745,
- "tag": "ModelDB:261624"
- },
- {
- "id": 568,
- "tag": "Parameter Fitting"
- },
- {
- "id": 801,
- "tag": "Parkinson's"
- },
- {
- "id": 809,
- "tag": "Reinforcement Learning"
- }
- ],
- "timestamp_created": "2024-01-12 18:45:18.673971+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/261624",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2089": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 2089,
- "name": "Tonic activation of extrasynaptic NMDA-R promotes bistability (Gall & Dupont 2020)",
- "repository_type": "github",
- "summary": "Our theoretical model provides a simple description of neuronal electrical activity that takes into account the tonic activity of extrasynaptic NMDA receptors and a cytosolic calcium compartment. We show that calcium influx mediated by the tonic activity of NMDA-R can be coupled directly to the activation of calcium-activated potassium channels, resulting in an overall inhibitory effect on neuronal excitability. Furthermore, the presence of tonic NMDA-R activity promotes bistability in electrical activity by dramatically increasing the stimulus interval where both a stable steady state and repetitive firing can coexist. These results could provide an intrinsic mechanism for the constitution of memory traces in neuronal circuits.",
- "tags": [
- {
- "id": 727,
- "tag": "Action Potential Initiation"
- },
- {
- "id": 827,
- "tag": "Aging/Alzheimer`s"
- },
- {
- "id": 572,
- "tag": "Calcium dynamics"
- },
- {
- "id": 710,
- "tag": "FORTRAN"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 2436,
- "tag": "Memory"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2746,
- "tag": "ModelDB:261709"
- }
- ],
- "timestamp_created": "2024-01-12 18:45:19.377277+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/261709",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2090": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 2090,
- "name": "A Markov model of human Cav2.3 channels and their modulation by Zn2+ (Neumaier et al 2020)",
- "repository_type": "github",
- "summary": "The Markov model for Cav2.3 channel gating in the absence of trace metals was developed based on channel structure, previous modeling studies and the ability to fit the data. Model parameters were optimized by fitting the model to macroscopic currents recorded with various electrophysiological protocols from HEK-293 cells stably transfected with human Cav2.3+\u00df3 channel subunits. The effects of Zn2+ were implemented by assuming that Zn2+ binding to a first site (KZn=0.003 mM) leads to electrostatic modification and mechanical slowing of one of the voltage-sensors while Zn2+-binding to a second, intra-pore site (KZn=0.1 mM) blocks the channel and modifies the opening and closing transitions.",
- "tags": [
- {
- "id": 1737,
- "tag": "Drug binding"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 567,
- "tag": "Ion Channel Kinetics"
- },
- {
- "id": 748,
- "tag": "Markov-type model"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2747,
- "tag": "ModelDB:261714"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 569,
- "tag": "Simplified Models"
- }
- ],
- "timestamp_created": "2024-01-12 18:45:20.440905+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/261714",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2091": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 2091,
- "name": "Online learning model of olfactory bulb external plexiform layer network (Imam & Cleland 2020)",
- "repository_type": "github",
- "summary": "This model illustrates the rapid online learning of odor representations, and their recognition despite high levels of interference (other competing odorants), in a model of the olfactory bulb external plexiform layer (EPL) network. The computational principles embedded in this model are based on the those developed in the biophysical models of Li and Cleland (2013, 2017). \r\n\r\nThis is a standard Python version of a model written for Intel's Loihi neuromorphic hardware platform (The Loihi code is available at https://github.com/intel-nrc-ecosystem/models/tree/master/official/epl).",
- "tags": [
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 595,
- "tag": "Coincidence Detection"
- },
- {
- "id": 754,
- "tag": "Delay"
- },
- {
- "id": 1799,
- "tag": "Gamma oscillations"
- },
- {
- "id": 808,
- "tag": "Hebbian plasticity"
- },
- {
- "id": 825,
- "tag": "Learning"
- },
- {
- "id": 2436,
- "tag": "Memory"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2748,
- "tag": "ModelDB:261864"
- },
- {
- "id": 1693,
- "tag": "Neurogenesis"
- },
- {
- "id": 588,
- "tag": "Olfaction"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 719,
- "tag": "Pattern Recognition"
- },
- {
- "id": 620,
- "tag": "Python"
- },
- {
- "id": 802,
- "tag": "STDP"
- },
- {
- "id": 725,
- "tag": "Synaptic Plasticity"
- },
- {
- "id": 586,
- "tag": "Synchronization"
- },
- {
- "id": 720,
- "tag": "Temporal Pattern Generation"
- }
- ],
- "timestamp_created": "2024-01-12 18:45:21.175223+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/261864",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2092": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 2092,
- "name": "Theoretical principles of DBS induced synaptic suppression (Farokhniaee & McIntyre 2019)",
- "repository_type": "github",
- "summary": "\"Deep brain stimulation (DBS) is a successful clinical therapy for a wide range of neurological disorders; however, the physiological mechanisms of DBS remain unresolved. While many different hypotheses currently exist, our analyses suggest that high frequency (~100?Hz) stimulation-induced synaptic suppression represents the most basic concept that can be directly reconciled with experimental recordings of spiking activity in neurons that are being driven by DBS inputs.\r\n\r\nObjective\r\nThe goal of this project was to develop a simple model system to characterize the excitatory post-synaptic currents (EPSCs) and action potential signaling generated in a neuron that is strongly connected to pre-synaptic glutamatergic inputs that are being directly activated by DBS.\r\n\r\nMethods\r\nWe used the Tsodyks-Markram (TM) phenomenological synapse model to represent depressing, facilitating, and pseudo-linear synapses driven by DBS over a wide range of stimulation frequencies. The EPSCs were then used as inputs to a leaky integrate-and-fire neuron model and we measured the DBS-triggered post-synaptic spiking activity.\r\n\r\nResults\r\nSynaptic suppression was a robust feature of high frequency stimulation, independent of the synapse type. As such, the TM equations were used to define alternative DBS pulsing strategies that maximized synaptic suppression with the minimum number of stimuli.\r\n...\"",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 831,
- "tag": "Deep brain stimulation"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2749,
- "tag": "ModelDB:261873"
- }
- ],
- "timestamp_created": "2024-01-12 18:45:21.847266+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/261873",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2093": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 2093,
- "name": "Effect of circuit structure on odor representation in insect olfaction (Rajagopalan & Assisi 2020)",
- "repository_type": "github",
- "summary": "\"How does the structure of a network affect its function? We address this question in the context of two olfactory systems that serve the same function, to distinguish the attributes of different odorants, but do so using markedly distinct architectures. In the locust, the probability of connections between projection neurons and Kenyon cells - a layer downstream - is nearly 50%. In contrast, this number is merely 5% in drosophila. We developed computational models of these networks to understand the relative advantages of each connectivity. Our analysis reveals that the two systems exist along a continuum of possibilities that balance two conflicting goals \u2013 separating the representations of similar odors while grouping together noisy variants of the same odor.\"",
- "tags": [
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2750,
- "tag": "ModelDB:261877"
- }
- ],
- "timestamp_created": "2024-01-12 18:45:22.350480+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/261877",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2094": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 2094,
- "name": "Decoding movement trajectory from simulated grid cell population activity (Bush & Burgess 2019)",
- "repository_type": "github",
- "summary": "Matlab code to simulate a population of grid cells that exhibit both a rate and phase code for location in 1D or 2D environments, and are modulated by a human hippocampal LFP signal with highly variable frequency; then subsequently decode location, running speed, movement direction and an arbitrary fourth variable from population firing rates and phases in each oscillatory cycle.",
- "tags": [
- {
- "id": 1461,
- "tag": "Grid cell"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2751,
- "tag": "ModelDB:261878"
- },
- {
- "id": 799,
- "tag": "Place cell/field"
- },
- {
- "id": 800,
- "tag": "Spatial Navigation"
- },
- {
- "id": 2475,
- "tag": "Temporal Coding"
- },
- {
- "id": 2384,
- "tag": "Theta oscillations"
- }
- ],
- "timestamp_created": "2024-01-12 18:45:22.848060+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/261878",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2095": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 2095,
- "name": "Graph-theoretical Derivation of Brain Structural Connectivity (Giacopelli et al 2020)",
- "repository_type": "github",
- "summary": "Brain connectivity at the single neuron level can provide fundamental insights into how information is integrated and propagated within and between brain regions. However, it is almost impossible to adequately study this problem experimentally and, despite intense efforts in the field, no mathematical description has been obtained so far. Here, we present a mathematical framework based on a graph-theoretical approach that, starting from experimental data obtained from a few small subsets of neurons, can quantitatively explain and predict the corresponding full network properties. This model also changes the paradigm with which large-scale model networks can be built, from using probabilistic/empiric connections or limited data, to a process that can algorithmically generate neuronal networks connected as in the real system.",
- "tags": [
- {
- "id": 855,
- "tag": "Connectivity matrix"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 756,
- "tag": "Methods"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2752,
- "tag": "ModelDB:261881"
- }
- ],
- "timestamp_created": "2024-01-12 18:45:23.334059+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/261881",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2096": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 2096,
- "name": "Network model of movement disorders (Yousif et al 2020)",
- "repository_type": "github",
- "summary": "This is a Wilson-Cowan model of the basal ganglia thalamocortical cerebellar network that demonstrates healthy gamma band oscillations, Parkinsonian oscillations in the beta band and oscillations in the tremor frequency range arising from the dynamics of the network.",
- "tags": [
- {
- "id": 831,
- "tag": "Deep brain stimulation"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2753,
- "tag": "ModelDB:261882"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 801,
- "tag": "Parkinson's"
- }
- ],
- "timestamp_created": "2024-01-12 18:45:23.828942+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/261882",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2097": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 2097,
- "name": "L5 cortical neurons with recreated synaptic inputs in vitro correlation transfer (Linaro et al 2019)",
- "repository_type": "github",
- "summary": "\"...We studied pyramidal neurons and two classes of GABAergic interneurons of layer 5 in neocortical brain slices obtained from rats of both sexes, and we stimulated them with biophysically realistic correlated inputs, generated using dynamic clamp. We found that the physiological differences between cell types manifested unique features in their capacity to transfer correlated inputs. We used linear response theory and computational modeling to gain clear insights into how cellular properties determine both the gain and timescale of correlation transfer, thus tying single-cell features with network interactions. Our results provide further ground for the functionally distinct roles played by various types of neuronal cells in the cortical microcircuit...\"",
- "tags": [
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2754,
- "tag": "ModelDB:261899"
- }
- ],
- "timestamp_created": "2024-01-12 18:45:24.372840+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/261899",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2098": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 2098,
- "name": "A computational model of single-neuron perturbations (Sadeh and Clopath 2020)",
- "repository_type": "github",
- "summary": "A computational model to study the effect of single-neuron perturbations in large-scale excitatory-inhibitory networks of the primary visual cortex. Neuronal receptive fields and connectivity are constrained by experimental literature. The model addresses how the influence of perturbing an excitatory neuron (\"influencer\") in the network on other neurons (\"influencees\") depends on the similarity of their receptive fields. Specifically, in which regimes this influence is dominated by amplification or suppression, and how it relates to functional properties of neurons.",
- "tags": [
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2755,
- "tag": "ModelDB:262045"
- }
- ],
- "timestamp_created": "2024-01-12 18:45:24.985463+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/262045",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2099": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 2099,
- "name": "Cortical Basal Ganglia Network Model during Closed-loop DBS (Fleming et al 2020)",
- "repository_type": "github",
- "summary": "We developed a computational model of the cortical basal ganglia network to investigate closed-loop control of deep brain stimulation (DBS) for Parkinson\u2019s disease (PD). The cortical basal ganglia network model incorporates the (i) the extracellular DBS electric field, (ii) antidromic and orthodromic activation of STN afferent fibers, (iii) the LFP detected at non-stimulating contacts on the DBS electrode and (iv) temporal variation of network beta-band activity within the thalamo-cortico-basal ganglia loop. The model facilitates investigation of clinically-viable closed-loop DBS control approaches, modulating either DBS amplitude or frequency, using an LFP derived measure of network beta-activity.",
- "tags": [
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 2042,
- "tag": "Beta oscillations"
- },
- {
- "id": 831,
- "tag": "Deep brain stimulation"
- },
- {
- "id": 734,
- "tag": "Extracellular Fields"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 589,
- "tag": "I L high threshold"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 575,
- "tag": "I T low threshold"
- },
- {
- "id": 1433,
- "tag": "I_AHP"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2756,
- "tag": "ModelDB:262046"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 801,
- "tag": "Parkinson's"
- },
- {
- "id": 714,
- "tag": "PyNN"
- },
- {
- "id": 620,
- "tag": "Python"
- }
- ],
- "timestamp_created": "2024-01-12 18:45:29.555746+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/262046",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2100": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 2100,
- "name": "Kesten and Langevin synaptic size fluctuation simulator (Hazan & Ziv 2020)",
- "repository_type": "github",
- "summary": "Sizes of glutamatergic synapses vary tremendously, even when formed on the same neuron. This diversity is commonly thought to reflect the outcome of activity-dependent forms of synaptic plasticity, yet activity-independent processes might also play some part. In this paper we show that in neurons with no history of activity whatsoever, synaptic sizes are no less diverse. We show that this diversity is the product of activity-independent size fluctuations, which are sufficient to generate a full repertoire of synaptic sizes at correct proportions. This simulator shows how synaptic size fluctuations governed by a stochastic process known as a Kesten process (as well as a specific form of a non-linear Langevin process) can give rise to this size diversity.",
- "tags": [
- {
- "id": 2757,
- "tag": "Kesten Process"
- },
- {
- "id": 2758,
- "tag": "Langevin process"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2759,
- "tag": "ModelDB:262059"
- },
- {
- "id": 761,
- "tag": "QBasic/QuickBasic/Turbo Basic/VBA"
- },
- {
- "id": 1576,
- "tag": "Stochastic simulation"
- },
- {
- "id": 744,
- "tag": "Synaptic noise"
- }
- ],
- "timestamp_created": "2024-01-12 18:45:30.088094+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/262059",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2101": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 2101,
- "name": "Mesoscopic model of spontaneous synaptic size fluctuations (Hazan & Ziv 2020)",
- "repository_type": "github",
- "summary": "Sizes of glutamatergic synapses vary tremendously, even when formed on the same neuron. This diversity is commonly thought to reflect the outcome of activity-dependent forms of synaptic plasticity, yet activity-independent processes might also play some part. Here we show that in neurons with no history of activity whatsoever, synaptic sizes are no less diverse. We show that this diversity is the product of activity-independent size fluctuations, which are sufficient to generate a full repertoire of synaptic sizes at correct proportions. By combining modeling and experimentation we expose reciprocal relationships between size fluctuations, synaptic sizes and synaptic counts, and show how these phenomena might be connected through the dynamics of synaptic molecules as they move in, out and between synapses.",
- "tags": [
- {
- "id": 755,
- "tag": "C or Cplusplus program"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2760,
- "tag": "ModelDB:262060"
- },
- {
- "id": 1919,
- "tag": "Reaction-diffusion"
- },
- {
- "id": 1576,
- "tag": "Stochastic simulation"
- },
- {
- "id": 744,
- "tag": "Synaptic noise"
- }
- ],
- "timestamp_created": "2024-01-12 18:45:30.587698+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/262060",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2102": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 2102,
- "name": "The ventricular AP and effects of the isoproterenol-induced cardiac hypertrophy (Sengul et al 2020)",
- "repository_type": "github",
- "summary": "This model reproduces Action Potential (AP) of Rat Ventricular Myocytes according to the experimental AP and Voltage Clamp recordings.",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 1684,
- "tag": "Ca pump"
- },
- {
- "id": 1531,
- "tag": "I Cl, leak"
- },
- {
- "id": 591,
- "tag": "I K,leak"
- },
- {
- "id": 1532,
- "tag": "I Na, leak"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 783,
- "tag": "I_Ks"
- },
- {
- "id": 817,
- "tag": "I_Na,Ca"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2761,
- "tag": "ModelDB:262081"
- },
- {
- "id": 740,
- "tag": "Na/K pump"
- }
- ],
- "timestamp_created": "2024-01-12 18:46:29.524942+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/262081",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2103": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 2103,
- "name": "Energy-efficient information transfer at thalamocortical synapses (Harris et al 2019)",
- "repository_type": "github",
- "summary": "\" ... Using both multicompartment Hodgkin-Huxley-type simulations and electrophysiological recordings in rodent brain slices, we find that increasing or decreasing the postsynaptic conductance of the set of thalamocortical inputs to one L4SS (Layer 4 Spiny Stellate) cell decreases the energy efficiency of information transmission from a single thalamocortical input. ...\"",
- "tags": [
- {
- "id": 1478,
- "tag": "Information transfer"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2762,
- "tag": "ModelDB:262114"
- },
- {
- "id": 577,
- "tag": "NEURON"
- }
- ],
- "timestamp_created": "2024-01-12 18:46:30.077322+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/262114",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2104": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 2104,
- "name": "NN activity impact on neocortical pyr. neurons integrative properties in vivo (Destexhe & Pare 1999)",
- "repository_type": "github",
- "summary": "\"During wakefulness, neocortical neurons are subjected to an intense\r\nsynaptic bombardment. To assess the consequences of this background\r\nactivity for the integrative properties of pyramidal neurons, we\r\nconstrained biophysical models with in vivo intracellular data\r\nobtained in anesthetized cats during periods of intense network\r\nactivity similar to that observed in the waking state. In pyramidal\r\ncells of the parietal cortex (area 5\u20137), synaptic activity was\r\nresponsible for an approximately fivefold decrease in input resistance\r\n(Rin), a more depolarized membrane potential (Vm), and a marked\r\nincrease in the amplitude of Vm fluctuations, as determined by\r\ncomparing the same cells before and after microperfusion of\r\ntetrodotoxin (TTX).\r\n...\"",
- "tags": [
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 580,
- "tag": "I M"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2763,
- "tag": "ModelDB:262115"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 596,
- "tag": "Synaptic Integration"
- }
- ],
- "timestamp_created": "2024-01-12 18:46:30.564902+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/262115",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2105": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 2105,
- "name": "ROOTS: An Algorithm to Generate Biologically Realistic Cortical Axons (Bingham et al 2020)",
- "repository_type": "github",
- "summary": "\"... a Ruled-Optimum Ordered Tree System (ROOTS) was developed\r\nthat extends the capability of neuronal morphology generative\r\nmethods to include highly branched cortical axon terminal\r\narbors. Further, this study presents and explores a clear\r\nuse-case for such models in the prediction of cortical tissue\r\nresponse to externally applied electric fields. The results\r\npresented herein comprise (i) a quantitative and qualitative\r\nanalysis of the generative algorithm proposed, (ii) a comparison\r\nof generated fibers with those observed in histological\r\nstudies, (iii) a study of the requisite spatial and morphological\r\ncomplexity of axonal arbors for accurate prediction of neuronal\r\nresponse to extracellular electrical stimulation, and (iv) an\r\nextracellular electrical stimulation strength\u2013duration analysis\r\nto explore probable thresholds of excitation of the dentate\r\nperforant path under controlled conditions.\r\n...\"",
- "tags": [
- {
- "id": 756,
- "tag": "Methods"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2764,
- "tag": "ModelDB:262138"
- },
- {
- "id": 853,
- "tag": "Python (web link to model)"
- }
- ],
- "timestamp_created": "2024-01-12 18:46:31.166594+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/262138",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2106": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 2106,
- "name": "A single-cell spiking model for the origin of grid-cell patterns (D'Albis & Kempter 2017)",
- "repository_type": "github",
- "summary": "A single-cell spiking model explaining the formation of grid-cell pattern in a feed-forward network. Patterns emerge via spatially-tuned feedforward inputs, synaptic plasticity, and spike-rate adaptation.",
- "tags": [
- {
- "id": 2765,
- "tag": "ModelDB:262187"
- },
- {
- "id": 620,
- "tag": "Python"
- },
- {
- "id": 802,
- "tag": "STDP"
- },
- {
- "id": 725,
- "tag": "Synaptic Plasticity"
- },
- {
- "id": 1461,
- "tag": "Grid cell"
- },
- {
- "id": 825,
- "tag": "Learning"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- }
- ],
- "timestamp_created": "2024-01-12 18:46:31.693062+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/262187",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2107": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 2107,
- "name": "Biophysical modeling of pathological brain states (Sudhakar et al 2019)",
- "repository_type": "github",
- "summary": "\"Traumatic brain injuries (TBI) lead to dramatic changes in the surviving brain tissue. Altered ion concentrations, coupled with changes in the expression of membrane-spanning proteins, create a post-TBI brain state that can lead to further neuronal loss caused by secondary excitotoxicity. Several GABA receptor agonists have been tested in the search for neuroprotection immediately after an injury, with paradoxical results. These drugs not only fail to offer neuroprotection, but can also slow down functional recovery after TBI. Here, using computational modeling, we provide a biophysical hypothesis to explain these observations. We show that the accumulation of intracellular chloride ions caused by a transient upregulation of Na+-K+-2Cl- (NKCC1) co-transporters as observed following TBI, causes GABA receptor agonists to lead to excitation and depolarization block, rather than the expected hyperpolarization. The likelihood of prolonged, excitotoxic depolarization block is further exacerbated by the extremely high levels of extracellular potassium seen after TBI. Our modeling results predict that the neuroprotective efficacy of GABA receptor agonists can be substantially enhanced when they are combined with NKCC1 co-transporter inhibitors. This suggests a rational, biophysically principled method for identifying drug combinations for neuroprotection after TBI.\"",
- "tags": [
- {
- "id": 873,
- "tag": "Depolarization block"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2766,
- "tag": "ModelDB:262233"
- },
- {
- "id": 1687,
- "tag": "NKCC1"
- }
- ],
- "timestamp_created": "2024-01-12 18:46:32.206513+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/262233",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2108": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 2108,
- "name": "Recurrent amplification of grid-cell activity (D'Albis and Kempter 2020)",
- "repository_type": "github",
- "summary": "Recurrent amplification of grid-cell activity (D'Albis and Kempter 2020)",
- "tags": [
- {
- "id": 718,
- "tag": "Attractor Neural Network"
- },
- {
- "id": 1461,
- "tag": "Grid cell"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2767,
- "tag": "ModelDB:262356"
- },
- {
- "id": 620,
- "tag": "Python"
- }
- ],
- "timestamp_created": "2024-01-12 18:46:32.785616+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/262356",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2109": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 2109,
- "name": "Biophysical basis of Subthalamic LFPs Recorded from DBS electrodes (Maling et al 2018)",
- "repository_type": "github",
- "summary": "\"Clinical deep brain stimulation (DBS) technology is evolving to enable chronic recording of local field potentials (LFPs) that represent electrophysiological biomarkers of the underlying disease state. However, little is known about the biophysical basis of LFPs, or how the patient\u2019s unique brain anatomy and electrode placement impact the recordings. Therefore, we developed a patient-specific computational framework to analyze LFP recordings within a clinical DBS context. We selected a subject with Parkinson\u2019s disease implanted with a Medtronic Activa PC+S DBS system and reconstructed their subthalamic nucleus (STN) and DBS electrode location using medical imaging data. The patient-specific STN volume was populated with 235,280 multicompartment STN neuron models, providing a neuron density consistent with histological measurements. Each neuron received time-varying synaptic inputs and generated transmembrane currents that gave rise to the LFP signal recorded at DBS electrode contacts residing in a finite element volume conductor model. We then used the model to study the role of synchronous beta-band inputs to the STN neurons on the recorded power spectrum. ...\"",
- "tags": [
- {
- "id": 831,
- "tag": "Deep brain stimulation"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2768,
- "tag": "ModelDB:262368"
- },
- {
- "id": 743,
- "tag": "NEURON (web link to model)"
- },
- {
- "id": 801,
- "tag": "Parkinson's"
- }
- ],
- "timestamp_created": "2024-01-12 18:46:33.301172+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/262368",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2110": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 2110,
- "name": "Norepinephrine stimulates glycogenolysis in astrocytes to fuel neurons (Coggan et al 2018)",
- "repository_type": "github",
- "summary": "\"The mechanism of rapid energy supply to the brain, especially to accommodate the heightened metabolic activity of excited states, is not well-understood. We explored the role of glycogen as a fuel source for neuromodulation using the noradrenergic stimulation of glia in a computational model of the neural-glial-vasculature ensemble (NGV). The detection of norepinephrine (NE) by the astrocyte and the coupled cAMP signal are rapid and largely insensitive to the distance of the locus coeruleus projection release sites from the glia, implying a diminished impact for volume transmission in high affinity receptor transduction systems. Glucosyl-conjugated units liberated from glial glycogen by NE-elicited cAMP second messenger transduction winds sequentially through the glycolytic cascade, generating robust increases in NADH and ATP before pyruvate is finally transformed into lactate. This astrocytic lactate is rapidly exported by monocarboxylate transporters to the associated neuron, demonstrating that the astrocyte-to-neuron lactate shuttle activated by glycogenolysis is a likely fuel source for neuromodulation and enhanced neural activity. Altogether, the energy supply for both astrocytes and neurons can be supplied rapidly by glycogenolysis upon neuromodulatory stimulus.\"",
- "tags": [
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2769,
- "tag": "ModelDB:262373"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 1974,
- "tag": "Volume transmission"
- }
- ],
- "timestamp_created": "2024-01-12 18:46:33.843724+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/262373",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2111": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 2111,
- "name": "Survey of electrically evoked responses in the retina (Tsai et al 2017)",
- "repository_type": "github",
- "summary": "\"Cones and horizontal cells are interconnected to adjacent cones and horizontal cells, respectively, with gap junctions. In particular, the horizontal cell gap junctional conductance is modulated by exogenous factors. What roles does this conductance play in the electrically evoked responses of horizontal cells? To address this question, we constructed a computational model consisting of the cone and horizontal cell layer...\"",
- "tags": [
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2770,
- "tag": "ModelDB:262389"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- }
- ],
- "timestamp_created": "2024-01-12 18:46:34.353689+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/262389",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2112": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 2112,
- "name": "Burst and tonic firing behaviour in subfornical organ (SFO) neurons (Medlock et al 2018)",
- "repository_type": "github",
- "summary": "\"Subfornical organ (SFO) neurons exhibit heterogeneity in current expression and spiking behavior,\r\nwhere the two major spiking phenotypes appear as tonic and burst firing. Insight into the mechanisms behind\r\nthis heterogeneity is critical for understanding how the SFO, a sensory circumventricular organ, integrates and\r\nselectively influences physiological function. To integrate efficient methods for studying this heterogeneity,\r\nwe built a single-compartment, Hodgkin-Huxley-type model of an SFO neuron that is parameterized by SFO-specific in vitro patch-clamp data. The model accounts for the membrane potential distribution and spike train variability of both tonic and burst firing SFO neurons. Analysis of model dynamics confirms that a persistent Na+ and Ca2+ currents are required for burst initiation and maintenance and suggests that a slow-activating K+ current may be responsible for burst termination in SFO neurons. Additionally, the model suggests that heterogeneity in current expression and subsequent influence on spike afterpotential underlie the behavioral differences between tonic and burst firing SFO neurons. Future use of this model in coordination with single neuron patch-clamp electrophysiology provides a platform for explaining and predicting the response of SFO neurons to various combinations of circulating signals, thus elucidating the mechanisms underlying physiological signal integration within the SFO.\"",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 566,
- "tag": "Bursting"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 739,
- "tag": "I Na,p"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 783,
- "tag": "I_Ks"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2771,
- "tag": "ModelDB:262422"
- },
- {
- "id": 569,
- "tag": "Simplified Models"
- }
- ],
- "timestamp_created": "2024-01-12 18:46:34.886720+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/262422",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2113": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 2113,
- "name": "Computational modeling of ultrasonic Subthalamic Nucleus stimulation (Tarnaud et al 2019)",
- "repository_type": "github",
- "summary": "\"Objective: To explore the potential of ultrasonic modulation of plateau-potential generating subthalamic nucleus neurons (STN), by modeling their interaction with continuous and pulsed ultrasonic waves. Methods: A computational model for ultrasonic stimulation of the STN is created by combining the Otsuka-model with the bilayer sonophore model. The neuronal response to continuous and pulsed ultrasonic waves is computed in parallel for a range of frequencies, duty cycles, pulse repetition frequencies, and intensities. ...\"",
- "tags": [
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 831,
- "tag": "Deep brain stimulation"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 589,
- "tag": "I L high threshold"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 575,
- "tag": "I T low threshold"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2772,
- "tag": "ModelDB:262431"
- },
- {
- "id": 801,
- "tag": "Parkinson's"
- }
- ],
- "timestamp_created": "2024-01-12 18:46:35.402039+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/262431",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2114": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 2114,
- "name": "A gap junction network of Amacrine Cells controls Nitric Oxide release (Jacoby et al 2018)",
- "repository_type": "github",
- "summary": "\"... The effects of the neuromodulator nitric oxide (NO) have\r\nbeen studied in many circuits, including in the vertebrate\r\nretina, where it regulates synaptic release, gap junction\r\ncoupling, and blood vessel dilation, but little is known about\r\nthe cells that release NO. We show that a single type of amacrine\r\ncell (AC) controls NO release in the inner retina, and we report\r\nits light responses, electrical properties, and calcium\r\ndynamics. We discover that this AC forms a dense gap junction\r\nnetwork and that the strength of electrical coupling in the\r\nnetwork is regulated by light through NO. A model of the network\r\noffers insights into the biophysical specializations leading to\r\nauto-regulation of NO release within the network.\"",
- "tags": [
- {
- "id": 767,
- "tag": "MATLAB (web link to model)"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2773,
- "tag": "ModelDB:262452"
- },
- {
- "id": 743,
- "tag": "NEURON (web link to model)"
- }
- ],
- "timestamp_created": "2024-01-12 18:46:35.903860+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/262452",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2115": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 2115,
- "name": "Complex dynamics: reproducing Golgi cell electroresponsiveness (Geminiani et al 2018, 2019ab)",
- "repository_type": "github",
- "summary": "Excerpts from three papers abstracts: \"Brain neurons exhibit complex electroresponsive properties \u2013 including intrinsic subthreshold oscillations and pacemaking, resonance and phase-reset \u2013 which are thought to play a critical role in controlling neural network dynamics. Although these properties emerge from detailed representations of molecular-level mechanisms in \u201crealistic\u201d models, they cannot usually be generated by simplified neuronal models (although these may show spike-frequency adaptation and bursting). We report here that this whole set of properties can be generated by the extended generalized leaky integrate-and-fire (E-GLIF) neuron model. ...\" \"... In order to reproduce these properties in single-point neuron models, we have optimized the Extended-Generalized Leaky Integrate and Fire (E-GLIF) neuron through a multi-objective gradient-based algorithm targeting the desired input\u2013output relationships. ...\" \" ... In order to investigate how single neuron dynamics and geometrical modular connectivity affect cerebellar processing, we have built an olivocerebellar Spiking Neural Network (SNN) based on a novel simplification algorithm for single point models (Extended Generalized Leaky Integrate and Fire, EGLIF) capturing essential non-linear neuronal dynamics (e.g., pacemaking, bursting, adaptation, oscillation and resonance). ...\"",
- "tags": [
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 566,
- "tag": "Bursting"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2774,
- "tag": "ModelDB:262456"
- },
- {
- "id": 611,
- "tag": "NEST"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 777,
- "tag": "Spike Frequency Adaptation"
- }
- ],
- "timestamp_created": "2024-01-12 18:46:36.399459+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/262456",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2116": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 2116,
- "name": "Multi-area layer-resolved spiking network model of resting-state dynamics in macaque visual cortex",
- "repository_type": "github",
- "summary": "See https://inm-6.github.io/multi-area-model/ for any updates.",
- "tags": [
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 855,
- "tag": "Connectivity matrix"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2775,
- "tag": "ModelDB:262457"
- },
- {
- "id": 866,
- "tag": "Multiscale"
- },
- {
- "id": 611,
- "tag": "NEST"
- },
- {
- "id": 587,
- "tag": "Spatio-temporal Activity Patterns"
- },
- {
- "id": 586,
- "tag": "Synchronization"
- }
- ],
- "timestamp_created": "2024-01-12 18:46:36.958962+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/262457",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2117": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 2117,
- "name": "Cellular function given parametric variation in the HH model of excitability (Ori et al 2018)",
- "repository_type": "github",
- "summary": "\"How is reliable physiological function maintained in cells despite considerable variability in the values of key parameters of multiple interacting processes that govern that function? Here, we use the classic Hodgkin\u2013Huxley formulation of the squid giant axon action potential to propose a possible approach to this problem. Although the full Hodgkin\u2013Huxley model is very sensitive to fluctuations that independently occur in its many parameters, the outcome is in fact determined by simple combinations of these parameters along two physiological dimensions: structural and kinetic (denoted S and K, respectively). Structural parameters describe the properties of the cell, including its capacitance and the densities of its ion channels. Kinetic parameters are those that describe the opening and closing of the voltage-dependent conductances. The impacts of parametric fluctuations on the dynamics of the system\u2014seemingly complex in the high-dimensional representation of the Hodgkin\u2013Huxley model\u2014are tractable when examined within the S\u2013K plane. We demonstrate that slow inactivation, a ubiquitous activity-dependent feature of ionic channels, is a powerful local homeostatic control mechanism that stabilizes excitability amid changes in structural and kinetic parameters.\"",
- "tags": [
- {
- "id": 2141,
- "tag": "Mathematica (web link to model)"
- },
- {
- "id": 756,
- "tag": "Methods"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2776,
- "tag": "ModelDB:262464"
- },
- {
- "id": 863,
- "tag": "Parameter sensitivity"
- }
- ],
- "timestamp_created": "2024-01-12 18:46:37.484670+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/262464",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2118": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 2118,
- "name": "Development and Binocular Matching of Orientation Selectivity in Visual Cortex (Xu et al 2020)",
- "repository_type": "github",
- "summary": "This model investigates the development of orientation selectivity and its binocular matching in visual cortex by implementing a neuron that has plastic synapses for its inputs from the left and right eye. The plasticity is taken to be voltage-based with homeostasis (Clopath et al 2010). The neuron is modeled as an adaptive exponential integrate-fire neuron. The uploaded model has been used in Xu, Cang & Riecke (2020) to analyze the impact of ocular dominance and orientation selectivity on the matching process. There it has been found that the matching can proceed by a slow shifting or a sudden switching of the preferred orientation.",
- "tags": [
- {
- "id": 793,
- "tag": "Development"
- },
- {
- "id": 749,
- "tag": "Long-term Synaptic Plasticity"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2777,
- "tag": "ModelDB:262465"
- },
- {
- "id": 1569,
- "tag": "Orientation selectivity"
- },
- {
- "id": 725,
- "tag": "Synaptic Plasticity"
- },
- {
- "id": 726,
- "tag": "Vision"
- }
- ],
- "timestamp_created": "2024-01-12 18:46:37.994509+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/262465",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2119": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 2119,
- "name": "Locust mushroom body - Ray et al 2020",
- "repository_type": "github",
- "summary": "Locust olfactory network with GGN and full KC population in the mushroom body (Ray et al 2020). ",
- "tags": [
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 604,
- "tag": "Network"
- },
- {
- "id": 540,
- "tag": "OSBv1"
- },
- {
- "id": 2934,
- "tag": "Schistocerca americana"
- }
- ],
- "timestamp_created": "2024-01-12 18:46:38.484190+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/262670",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2120": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 2120,
- "name": "Evaluation of passive component of propagating AP in mossy fiber axons (Ohura & Kamiya 2018)",
- "repository_type": "github",
- "summary": "\"Action potentials propagating along axons are often followed by prolonged afterdepolarization (ADP) lasting for several tens of milliseconds. Axonal ADP is thought to be an important factor in modulating the fidelity of spike propagation during repetitive firings. However, the mechanism as well as the functional significance of axonal ADP remain unclear, partly due to inaccessibility to small structures of axon for direct electrophysiological recordings. Here, we examined the ionic and electrical mechanisms underlying axonal ADP using whole-bouton recording from mossy fiber terminals in mice hippocampal slices. ADP following axonal action potentials was strongly enhanced by focal application of veratridine, an inhibitor of Na+ channel inactivation. In contrast, tetrodotoxin (TTX) partly suppressed ADP, suggesting that a Na+ channel\u2013dependent component is involved in axonal ADP. The remaining TTX-resistant Na+ channel\u2013independent component represents slow capacitive discharge reflecting the shape and electrical properties of the axonal membrane. We also addressed the functional impact of axonal ADP on presynaptic function. In paired-pulse stimuli, we found that axonal ADP minimally affected the peak height of subsequent action potentials, although the rising phase of action potentials was slightly slowed, possibly due to steady-state inactivation of Na+ channels by prolonged depolarization. Voltage clamp analysis of Ca2+ current elicited by action potential waveform commands revealed that axonal ADP assists short-term facilitation of Ca2+ entry into the presynaptic terminals. Taken together, these data show that axonal ADP maintains reliable firing during repetitive stimuli and plays important roles in the fine-tuning of short-term plasticity of transmitter release by modulating Ca2+ entry into presynaptic terminals.\"",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2779,
- "tag": "ModelDB:263034"
- },
- {
- "id": 577,
- "tag": "NEURON"
- }
- ],
- "timestamp_created": "2024-01-12 18:46:39.039432+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/263034",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2121": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 2121,
- "name": "How BK and SK channels benefit early vision (Li X et al 2019)",
- "repository_type": "github",
- "summary": "\"Ca2+-activated K+ channels (BK and SK) are ubiquitous in synaptic circuits, but their role in network adaptation and sensory perception remains largely unknown. Using electrophysiological and behavioral assays and biophysical modeling, we discover how visual information transfer in mutants lacking the BK channel (dSlo- ), SK channel (dSK- ), or both (dSK- ;; dSlo- ) is shaped in the female fruit fly (Drosophila melanogaster) R1-R6 photoreceptor-LMC circuits (R-LMC-R system) through synaptic feedforward-feedback interactions and reduced R1-R6 Shaker and Shab K+ conductances. This homeostatic compensation is specific for each mutant, leading to distinctive adaptive dynamics. We show how these dynamics inescapably increase the energy cost of information and promote the mutants' distorted motion perception, determining the true price and limits of chronic homeostatic compensation in an in vivo genetic animal model. These results reveal why Ca2+-activated K+ channels reduce network excitability (energetics), improving neural adaptability for transmitting and perceiving sensory information. ...\"",
- "tags": [
- {
- "id": 75,
- "tag": "Homeostasis"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 1478,
- "tag": "Information transfer"
- },
- {
- "id": 729,
- "tag": "Invertebrate"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2780,
- "tag": "ModelDB:263042"
- }
- ],
- "timestamp_created": "2024-01-12 18:46:39.613497+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/263042",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2122": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 2122,
- "name": "L5 pyramidal neuron myelination increases analog-digital facilitation extent (Zbili & Debanne 2020)",
- "repository_type": "github",
- "summary": "Analog-digital facilitations (ADFs) correspond to a class of phenomena describing how subthreshold variations of the presynaptic membrane potential influence the synaptic transmission. ADFs rely on the propagation of somatic membrane potential fluctuations to the presynaptic bouton where they modulate ion channels availability, inducing modifications of the presynaptic spike waveform, and threfore modifying the neurotransmitter release. In this simulation, we show that myelination can promote the propagation of somatic voltage subtheshold fluctuations into the axon, allowing the ADFs to impact distal presynaptic bouton (up to 3mm from the soma).",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2781,
- "tag": "ModelDB:263053"
- },
- {
- "id": 577,
- "tag": "NEURON"
- }
- ],
- "timestamp_created": "2024-01-12 18:46:40.185928+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/263053",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2123": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 2123,
- "name": "Minimal model of interictal and ictal discharges \u201cEpileptor-2\u201d (Chizhov et al 2018)",
- "repository_type": "github",
- "summary": "\"Seizures occur in a recurrent manner with intermittent states of interictal and ictal discharges (IIDs and IDs). The transitions to and from IDs are determined by a set of processes, including synaptic interaction and ionic dynamics. Although mathematical models of separate types of epileptic discharges have been developed, modeling the transitions between states remains a challenge. A simple generic mathematical model of seizure dynamics (Epileptor) has recently been proposed by Jirsa et al. (2014); however, it is formulated in terms of abstract variables. In this paper, a minimal population-type model of IIDs and IDs is proposed that is as simple to use as the Epileptor, but the suggested model attributes physical meaning to the variables. The model is expressed in ordinary differential equations for extracellular potassium and intracellular sodium concentrations, membrane potential, and short-term synaptic depression variables. A quadratic integrate-and-fire model driven by the population input current is used to reproduce spike trains in a representative neuron. ...\"",
- "tags": [
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 804,
- "tag": "Bifurcation"
- },
- {
- "id": 722,
- "tag": "Depression"
- },
- {
- "id": 469,
- "tag": "Epilepsy"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 2782,
- "tag": "Javascript"
- },
- {
- "id": 1609,
- "tag": "Mathematica"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2783,
- "tag": "ModelDB:263074"
- },
- {
- "id": 740,
- "tag": "Na/K pump"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 865,
- "tag": "Pascal/Delphi"
- },
- {
- "id": 620,
- "tag": "Python"
- },
- {
- "id": 724,
- "tag": "Short-term Synaptic Plasticity"
- },
- {
- "id": 725,
- "tag": "Synaptic Plasticity"
- }
- ],
- "timestamp_created": "2024-01-12 18:46:40.715281+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/263074",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2124": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 2124,
- "name": "AMPA receptor trafficking and its role in heterosynaptic plasticity (Antunes et al 2018)",
- "repository_type": "github",
- "summary": "\"... cumulative experimental and theoretical data have\r\ndemonstrated that long-term potentiation (LTP) and long-term\r\ndepression (LTD) can promote compensatory alterations in\r\nnon-stimulated synapses. In this work, we have developed a (MCELL)\r\ncomputational model of a (3D) spiny dendritic segment\r\nto investigate the role of AMPA receptor (AMPAR) trafficking\r\nduring synaptic plasticity at specific synapses and its\r\nconsequences for the populations of AMPAR at nearby synapses. Our\r\nresults demonstrated that the mechanisms of AMPAR trafficking\r\ninvolved with LTP and LTD can promote heterosynaptic plasticity\r\nat non-stimulated synapses. These alterations are compensatory\r\nand arise from molecular competition. Moreover, the\r\nheterosynaptic changes observed in our model can modulate further\r\nactivity-driven inductions of synaptic plasticity.\" The model requires an installed version of MCell and CellBlender.",
- "tags": [
- {
- "id": 722,
- "tag": "Depression"
- },
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 749,
- "tag": "Long-term Synaptic Plasticity"
- },
- {
- "id": 826,
- "tag": "MCell"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2784,
- "tag": "ModelDB:263130"
- },
- {
- "id": 725,
- "tag": "Synaptic Plasticity"
- }
- ],
- "timestamp_created": "2024-01-12 18:46:41.267105+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/263130",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2125": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 2125,
- "name": "Cooling reverses pathological spontaneous firing caused by mild traumatic injury (Barlow et al 2018)",
- "repository_type": "github",
- "summary": "\"Mild traumatic injury can modify the key sodium (Na+) current underlying the excitability of neurons. It causes the activation and inactivation properties of this current to become shifted to more negative trans-membrane voltages. This so-called coupled left shift (CLS) leads to a chronic influx of Na+ into the cell that eventually causes spontaneous or \u201cectopic\u201d firing along the axon, even in the absence of stimuli. The bifurcations underlying this enhanced excitability have been worked out in full ionic models of this effect. Here, we present computational evidence that increased temperature T can exacerbate this pathological state. Conversely, and perhaps of clinical relevance, mild cooling is shown to move the naturally quiescent cell further away from the threshold of ectopic behavior. ...\"",
- "tags": [
- {
- "id": 804,
- "tag": "Bifurcation"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2785,
- "tag": "ModelDB:263193"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 740,
- "tag": "Na/K pump"
- },
- {
- "id": 1823,
- "tag": "Temperature"
- }
- ],
- "timestamp_created": "2024-01-12 18:46:41.788097+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/263193",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2126": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 2126,
- "name": "Drosophila circadian clock neurone model of essential tremor (Smith et al 2018)",
- "repository_type": "github",
- "summary": "Model of Drosophila ventral lateral neuron (LNV) used to study a human ion channel associated with essential tremor.",
- "tags": [
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2786,
- "tag": "ModelDB:263196"
- }
- ],
- "timestamp_created": "2024-01-12 18:46:42.319409+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/263196",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2127": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 2127,
- "name": "Drosophila lateral ventral clock neuron (LNV) model (Smith et al 2019)",
- "repository_type": "github",
- "summary": "LNVmodel models the activity of a Drosophila lateral ventral clock neurons (LNV) neurone.",
- "tags": [
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2787,
- "tag": "ModelDB:263199"
- }
- ],
- "timestamp_created": "2024-01-12 18:46:42.784926+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/263199",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2128": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 2128,
- "name": "Mean-Field models of conductance-based NNs of spiking neurons with adaptation (di Volo et al 2019)",
- "repository_type": "github",
- "summary": "\"Accurate population models are needed to build very large-scale neural models, but their derivation is difficult for realistic networks of neurons, in particular when nonlinear properties are involved, such as conductance-based interactions and spike-frequency adaptation. Here, we consider such models based on networks of adaptive exponential integrate-and-fire excitatory and inhibitory neurons. Using a master equation formalism, we derive a mean-field model of such networks and compare it to the full network dynamics. The mean-field model is capable of correctly predicting the average spontaneous activity levels in asynchronous irregular regimes similar to in vivo activity. It also captures the transient temporal response of the network to complex external inputs. Finally, the mean-field model is also able to quantitatively describe regimes where high- and low-activity states alternate (up-down state dynamics), leading to slow oscillations. We conclude that such mean-field models are biologically realistic in the sense that they can capture both spontaneous and evoked activity, and they naturally appear as candidates to build very large-scale models involving multiple brain areas.\"",
- "tags": [
- {
- "id": 756,
- "tag": "Methods"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2788,
- "tag": "ModelDB:263236"
- },
- {
- "id": 620,
- "tag": "Python"
- }
- ],
- "timestamp_created": "2024-01-12 18:46:43.307130+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/263236",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2129": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 2129,
- "name": "Somatodendritic consistency check for temporal feature segmentation (Asabuki & Fukai 2020)",
- "repository_type": "github",
- "summary": "\"The brain identifies potentially salient features within continuous information streams to process hierarchical temporal events. This requires the compression of information streams, for which effective computational principles are yet to be explored. Backpropagating action potentials can induce synaptic plasticity in the dendrites of cortical pyramidal neurons. By analogy with this effect, we model a self-supervising process that increases the similarity between dendritic and somatic activities where the somatic activity is normalized by a running average. We further show that a family of networks composed of the two-compartment neurons performs a surprisingly wide variety of complex unsupervised learning tasks, including chunking of temporal sequences and the source separation of mixed correlated signals. ...\"",
- "tags": [
- {
- "id": 825,
- "tag": "Learning"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2789,
- "tag": "ModelDB:263246"
- },
- {
- "id": 620,
- "tag": "Python"
- },
- {
- "id": 569,
- "tag": "Simplified Models"
- },
- {
- "id": 725,
- "tag": "Synaptic Plasticity"
- }
- ],
- "timestamp_created": "2024-01-12 18:46:43.798619+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/263246",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2130": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 2130,
- "name": "Mean field model for Hodgkin Huxley networks of neurons (Carlu et al 2020)",
- "repository_type": "github",
- "summary": "\"We present a mean-field formalism able to predict the collective dynamics of large networks of conductance-based interacting spiking neurons. We apply this formalism to several neuronal models, from the simplest Adaptive Exponential Integrate-and-Fire model to the more complex Hodgkin-Huxley and Morris-Lecar models. We show that the resulting mean-field models are capable of predicting the correct spontaneous activity of both excitatory and inhibitory neurons in asynchronous irregular regimes, typical of cortical dynamics. Moreover, it is possible to quantitatively predict the population response to external stimuli in the form of external spike trains. This mean-field formalism therefore provides a paradigm to bridge the scale between population dynamics and the microscopic complexity of the individual cells physiology.\"",
- "tags": [
- {
- "id": 756,
- "tag": "Methods"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2790,
- "tag": "ModelDB:263259"
- },
- {
- "id": 620,
- "tag": "Python"
- }
- ],
- "timestamp_created": "2024-01-12 18:46:44.272794+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/263259",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2131": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 2131,
- "name": "Synaptic strengths are critical in creating the proper output phasing in a CPG (Gunay et al 2019)",
- "repository_type": "github",
- "summary": "\"Identified neurons and the networks they compose produce stereotypical, albeit individually unique, activity\r\nacross members of a species. We propose, for a motor circuit driven by a central pattern generator (CPG), that\r\nthe uniqueness derives mainly from differences in synaptic strength rather than from differences in intrinsic\r\nmembrane conductances. We studied a dataset of recordings from six leech (Hirudo sp.) heartbeat control\r\nnetworks, containing complete spiking activity patterns from inhibitory premotor interneurons, motor output spike\r\npatterns, and synaptic strength patterns to investigate the source of uniqueness. We used a conductance-based\r\nmulticompartmental motor neuron model to construct a bilateral motor circuit model, and controlled it by playing\r\nrecorded input spike trains from premotor interneurons to generate output inhibitory synaptic patterns similar to\r\nexperimental measurements. By generating different synaptic conductance parameter sets of this circuit model,\r\nwe found that relative premotor synaptic strengths impinging onto motor neurons must be different across\r\nindividuals to produce animal-specific output burst phasing. Obtaining unique outputs from each individual\u2019s\r\ncircuit model did not require different intrinsic ionic conductance parameters. Furthermore, changing intrinsic conductances failed to compensate for modified synaptic strength patterns. ...\"",
- "tags": [
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 566,
- "tag": "Bursting"
- },
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 750,
- "tag": "GENESIS (web link to model)"
- },
- {
- "id": 767,
- "tag": "MATLAB (web link to model)"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2791,
- "tag": "ModelDB:263571"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 720,
- "tag": "Temporal Pattern Generation"
- }
- ],
- "timestamp_created": "2024-01-12 18:46:44.831864+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/263571",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2132": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 2132,
- "name": "Computational Modelling of TNFalpha Pathway in Parkinson's Disease (Sasidharakurup et al 2019)",
- "repository_type": "github",
- "summary": "\"The paper aims developing a computational framework of signaling using the principles of biochemical systems theory as a model for Parkinson\u2019s disease. Several molecular interactions aided by TNFalpha, a proinflammatory cytokine play key roles in mediating glutamate excitotoxicity and neuroinflammation, resulting in neuronal cell death. In this paper, initial concentrations and rate constants were extracted from literature and simulations developed were based on systems of ordinary differential equations following first-order kinetics. In control or healthy conditions, a decrease in TNFalpha and neuronal cell death was predicted in simulations matching data from experiments, whereas in diseased condition, a drastic increase in levels of TNFalpha, glutamate, TNFR1 and ROS were observed similar to experimental data correlating diseased condition to augmented neuronal cell death. The study suggests toxic effects induced by TNFalpha in the substantia nigra may be attributed to Parkinson\u2019s disease conditions.\"",
- "tags": [
- {
- "id": 2454,
- "tag": "CellDesigner"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2792,
- "tag": "ModelDB:263585"
- },
- {
- "id": 801,
- "tag": "Parkinson's"
- },
- {
- "id": 751,
- "tag": "Signaling pathways"
- }
- ],
- "timestamp_created": "2024-01-12 18:46:45.384540+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/263585",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2133": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 2133,
- "name": "A neural mass model for critical assessment of brain connectivity (Ursino et al 2020)",
- "repository_type": "github",
- "summary": "We use a neural mass model of interconnected regions of interest to simulate reliable neuroelectrical signals in the cortex. In particular, signals simulating mean field potentials were generated assuming two, three or four ROIs, connected via excitatory or by-synaptic inhibitory links. Then we investigated whether bivariate Transfer Entropy (TE) can be used to detect a statistically significant connection from data (as in binary 0/1 networks), and even if connection strength can be quantified (i.e., the occurrence of a linear relationship between TE and connection strength). Results suggest that TE can reliably estimate the strength of connectivity if neural populations work in their linear regions. However, nonlinear phenomena dramatically affect the assessment of connectivity, since they may significantly reduce TE estimation. Software included here allows the simulation of neural mass models with a variable number of ROIs and connections, the estimation of TE using the free package Trentool, and the realization of figures to compare true connectivity with estimated values.",
- "tags": [
- {
- "id": 1527,
- "tag": "Brain Rhythms"
- },
- {
- "id": 855,
- "tag": "Connectivity matrix"
- },
- {
- "id": 754,
- "tag": "Delay"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 767,
- "tag": "MATLAB (web link to model)"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2793,
- "tag": "ModelDB:263637"
- },
- {
- "id": 2794,
- "tag": "Trentool"
- }
- ],
- "timestamp_created": "2024-01-12 18:46:46.061773+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/263637",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2134": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 2134,
- "name": "Alpha rhythm in vitro visual cortex (Traub et al 2020)",
- "repository_type": "github",
- "summary": "The paper describes an experimental model of the alpha rhythm generated by layer 4 pyramidal neurons in a visual cortex slice. The simulation model is derived from that of Traub et al. (2005) J Neurophysiol, developed for thalamocortical oscillations.",
- "tags": [
- {
- "id": 1527,
- "tag": "Brain Rhythms"
- },
- {
- "id": 565,
- "tag": "Dendritic Action Potentials"
- },
- {
- "id": 710,
- "tag": "FORTRAN"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 730,
- "tag": "I A, slow"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 589,
- "tag": "I L high threshold"
- },
- {
- "id": 580,
- "tag": "I M"
- },
- {
- "id": 739,
- "tag": "I Na,p"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2795,
- "tag": "ModelDB:263703"
- }
- ],
- "timestamp_created": "2024-01-12 18:46:46.596661+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/263703",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2135": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 2135,
- "name": "Electrodecrements in in vitro model of infantile spasms (Traub et al 2020)",
- "repository_type": "github",
- "summary": "The code is an extension of the thalamocortical model of Traub et al. (2005) J Neurophysiol. It is here applied to an in vitro model of the electrodecremental response seen in the EEG of children with infantile spasms (West syndrome)",
- "tags": [
- {
- "id": 1527,
- "tag": "Brain Rhythms"
- },
- {
- "id": 469,
- "tag": "Epilepsy"
- },
- {
- "id": 710,
- "tag": "FORTRAN"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 730,
- "tag": "I A, slow"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 589,
- "tag": "I L high threshold"
- },
- {
- "id": 580,
- "tag": "I M"
- },
- {
- "id": 739,
- "tag": "I Na,p"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2796,
- "tag": "ModelDB:263705"
- }
- ],
- "timestamp_created": "2024-01-12 18:46:47.134804+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/263705",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2136": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 2136,
- "name": "Emergence of spatiotemporal sequences in spiking neuronal networks (Spreizer et al 2019)",
- "repository_type": "github",
- "summary": "\"Spatio-temporal sequences of neuronal activity are observed in many brain regions in a\r\nvariety of tasks and are thought to form the basis of meaningful behavior. However, mechanisms\r\nby which a neuronal network can generate spatio-temporal activity sequences have\r\nremained obscure. Existing models are biologically untenable because they either require\r\nmanual embedding of a feedforward network within a random network or supervised learning\r\nto train the connectivity of a network to generate sequences. Here, we propose a biologically\r\nplausible, generative rule to create spatio-temporal activity sequences in a network of\r\nspiking neurons with distance-dependent connectivity. We show that the emergence of spatio-\r\ntemporal activity sequences requires: (1) individual neurons preferentially project a small\r\nfraction of their axons in a specific direction, and (2) the preferential projection direction of\r\nneighboring neurons is similar. Thus, an anisotropic but correlated connectivity of neuron\r\ngroups suffices to generate spatio-temporal activity sequences in an otherwise random neuronal\r\nnetwork model.\"",
- "tags": [
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2797,
- "tag": "ModelDB:263711"
- },
- {
- "id": 611,
- "tag": "NEST"
- },
- {
- "id": 1744,
- "tag": "Neuromodulation"
- },
- {
- "id": 2406,
- "tag": "Spatial connectivity"
- },
- {
- "id": 587,
- "tag": "Spatio-temporal Activity Patterns"
- }
- ],
- "timestamp_created": "2024-01-12 18:46:47.770441+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/263711",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2137": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 2137,
- "name": "Fully-Asynchronous Cache-Efficient Simulation of Detailed Neural Networks (Magalhaes et al 2019)",
- "repository_type": "github",
- "summary": "\"Modern asynchronous runtime systems allow the re-thinking of large-scale scientific applications. With the example of a simulator of morphologically detailed neural networks, we show how detaching from the commonly used bulk-synchronous parallel (BSP) execution allows for the increase of prefetching capabilities, better cache locality, and a overlap of computation and communication, consequently leading to a lower time to solution. Our strategy removes the operation of collective synchronization of ODEs\u2019 coupling information, and takes advantage of the pairwise time dependency between equations, leading to a fully-asynchronous exhaustive yet not speculative stepping model. Combined with fully linear data structures, communication reduce at compute node level, and an earliest equation steps first scheduler, we perform an acceleration at the cache level that reduces communication and time to solution by maximizing the number of timesteps taken per neuron at each iteration.\r\n\r\nOur methods were implemented on the core kernel of the NEURON scientific application. Asynchronicity and distributed memory space are provided by the HPX runtime system for the ParalleX execution model. Benchmark results demonstrate a superlinear speed-up that leads to a reduced runtime compared to the bulk synchronous execution, yielding a speed-up between 25% to 65% across different compute architectures, and in the order of 15% to 40% for distributed executions.\"",
- "tags": [
- {
- "id": 756,
- "tag": "Methods"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2798,
- "tag": "ModelDB:263718"
- },
- {
- "id": 743,
- "tag": "NEURON (web link to model)"
- }
- ],
- "timestamp_created": "2024-01-12 18:46:48.249172+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/263718",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2138": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 2138,
- "name": "Levodopa-Induced Toxicity in Parkinson's Disease (Muddapu et al, 2022)",
- "repository_type": "github",
- "summary": "\"... We present a systems-level computational model of SNc-striatum, which will help us understand the mechanism behind neurodegeneration postulated above and provide insights into developing disease-modifying therapeutics. It was observed that SNc terminals are more vulnerable to energy deficiency than SNc somas. During L-DOPA therapy, it was observed that higher L-DOPA dosage results in increased loss of terminals in SNc. It was also observed that co-administration of L-DOPA and glutathione (antioxidant) evades L-DOPA-induced toxicity in SNc neurons. Our proposed model of the SNc-striatum system is the first of its kind, where SNc neurons were modeled at a biophysical level, and striatal neurons were modeled at a spiking level. We show that our proposed model was able to capture L-DOPA-induced toxicity in SNc, caused by energy deficiency.\"",
- "tags": [
- {
- "id": 1684,
- "tag": "Ca pump"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 1560,
- "tag": "I Ca,p"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 721,
- "tag": "I N"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 2319,
- "tag": "IK Skca"
- },
- {
- "id": 1931,
- "tag": "Kir"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 767,
- "tag": "MATLAB (web link to model)"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2799,
- "tag": "ModelDB:263719"
- },
- {
- "id": 738,
- "tag": "Na/Ca exchanger"
- },
- {
- "id": 740,
- "tag": "Na/K pump"
- },
- {
- "id": 801,
- "tag": "Parkinson's"
- }
- ],
- "timestamp_created": "2024-01-12 18:46:48.795841+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/263719",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2139": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 2139,
- "name": "Dynamics in random NNs with multiple neuron subtypes (Pena et al 2018, Tomov et al 2014, 2016)",
- "repository_type": "github",
- "summary": "\"Spontaneous cortical population activity exhibits a multitude of oscillatory patterns, which often display synchrony during slow-wave sleep or under certain anesthetics and stay asynchronous during quiet wakefulness. The mechanisms behind these cortical states and transitions among them are not completely understood. Here we study spontaneous population activity patterns in random networks of spiking neurons of mixed types modeled by Izhikevich equations. Neurons are coupled by conductance-based synapses subject to synaptic noise. We localize the population activity patterns on the parameter diagram spanned by the relative inhibitory synaptic strength and the magnitude of synaptic noise. In absence of noise, networks display transient activity patterns, either oscillatory or at constant level. The effect of noise is to turn transient patterns into persistent ones: for weak noise, all activity patterns are asynchronous non-oscillatory independently of synaptic strengths; for stronger noise, patterns have oscillatory and synchrony characteristics that depend on the relative inhibitory synaptic strength. ...\"",
- "tags": [
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 755,
- "tag": "C or Cplusplus program"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2800,
- "tag": "ModelDB:263956"
- },
- {
- "id": 2064,
- "tag": "Pattern Separation"
- },
- {
- "id": 592,
- "tag": "Sleep"
- },
- {
- "id": 744,
- "tag": "Synaptic noise"
- },
- {
- "id": 586,
- "tag": "Synchronization"
- }
- ],
- "timestamp_created": "2024-01-12 18:46:49.443921+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/263956",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2140": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 2140,
- "name": "Cellular classes revealed by heartbeat-related modulation of extracellular APs (Mosher et al 2020)",
- "repository_type": "github",
- "summary": "\"Determining cell types is critical for understanding neural circuits but remains elusive in the living human brain. Current approaches discriminate units into putative cell classes using features of the extracellular action potential (EAP); in absence of ground truth data, this remains a problematic procedure. We find that EAPs in deep structures of the brain exhibit robust and systematic variability during the cardiac cycle. These cardiac-related features refine neural classification. We use these features to link bio-realistic models generated from in vitro human whole-cell recordings of morphologically classified neurons to in vivo recordings. We differentiate aspiny inhibitory and spiny excitatory human hippocampal neurons and, in a second stage, demonstrate that cardiac-motion features reveal two types of spiny neurons with distinct intrinsic electrophysiological properties and phase-locking characteristics to endogenous oscillations. This multi-modal approach markedly improves cell classification in humans, offers interpretable cell classes, and is applicable to other brain areas and species.\"",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 2801,
- "tag": "Cardiac-related electrode motion"
- },
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 756,
- "tag": "Methods"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2802,
- "tag": "ModelDB:263961"
- },
- {
- "id": 743,
- "tag": "NEURON (web link to model)"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- }
- ],
- "timestamp_created": "2024-01-12 18:46:49.944986+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/263961",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2141": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 2141,
- "name": "Model of peripheral nerve with ephaptic coupling (Capllonch-Juan & Sepulveda 2020)",
- "repository_type": "github",
- "summary": "We built a computational model of a peripheral nerve trunk in which the interstitial space between the fibers and the tissues is modelled using a resistor network, thus enabling distance-dependent ephaptic coupling between myelinated axons and between fascicles as well. We used the model to simulate a) the stimulation of a nerve trunk model with a cuff electrode, and b) the propagation of action potentials along the axons. Results were used to investigate the effect of ephaptic interactions on recruitment and selectivity stemming from artificial (i.e., neural implant) stimulation and on the relative timing between action potentials during propagation.",
- "tags": [
- {
- "id": 733,
- "tag": "Ephaptic coupling"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2803,
- "tag": "ModelDB:263988"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 620,
- "tag": "Python"
- },
- {
- "id": 2248,
- "tag": "Stimulus selectivity"
- }
- ],
- "timestamp_created": "2024-01-12 18:46:50.449112+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/263988",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2142": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 2142,
- "name": "V1 and AL spiking neural network for visual contrast response in mouse (Meijer et al. 2020)",
- "repository_type": "github",
- "summary": "This code contains the computational model included in Meijer et al., Cell Reports 2020, which reproduces some of the main experimental findings reported --most notably, the higher sensory response of secondary visual areas compared to that of primary visual areas for moderate visual contrast levels in mice. The model is based on a two-area spiking neural network with embedded short-term synaptic plasticity mechanisms.",
- "tags": [
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2804,
- "tag": "ModelDB:263992"
- },
- {
- "id": 758,
- "tag": "Sensory processing"
- },
- {
- "id": 724,
- "tag": "Short-term Synaptic Plasticity"
- },
- {
- "id": 726,
- "tag": "Vision"
- }
- ],
- "timestamp_created": "2024-01-12 18:46:50.966040+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/263992",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "2143": {
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- "id": 2143,
- "name": "Action potential-evoked Ca2+ signals in CA1 pyramidal cell presynaptic terminals (Hamid et al 2019)",
- "repository_type": "github",
- "summary": "The attached file contains models for 4 different MCell simulations of the same presynaptic terminal model. \r\n\r\nCalbindin22_40uM_files - model of Ca entry, buffering and extrusion from a single varicosity of a CA1 pyramidal neuron axon containing 40 \u00b5M simulated calbindin28K (binding constants from Nagerl et al 2000, Biophys J 79:3009\u20133018. doi:10.1016/S0006-3495(00)76537-4 pmid:11106608. This model represents calbindin28K with 2 low and 2 intermediate affinity Ca2+ binding sites.\r\n\r\nCalbindin31_40uM_files - similar to above but with calbindin28K with 1 low and 3 intermediate affinity Ca2+ binding sites.\r\n\r\nCalmodulin_40uM_files - model of Ca2+ using calmodulin and the principle buffer, again at 40 \u00b5M (from Faas et al 2011, Nat Neurosci 14:301\u2013304. doi:10.1038/nn.2746 pmid:21258328.\r\n\r\nPaired_Pulses - model used to simulate paired pulses of Ca2+ entry to these presynaptic terminals\r\n\r\nThese models were based on experimentally quantified action potential-evoked Calcium entry to presynaptic varicosities of CA1 pyramidal neurons. How Ca enters, diffuses, is buffered and is pumped out of the cytosol was first determined. The study used Calcium-sensitive dyes of different affinities over a range of concentrations to buffer Calcium. Following this quantification we used these data to construct Monte Carlo simulations of the Calcium transients to determine dynamics of the Calcium signal at spatiotemporal resolutions not possible with imaging methods. From these simulations we have demonstrated very high concentrations, short duration Calcium transients that are dominated by Calcium diffusion within tens of nanometers of Calcium channels. We have quantified channel densities, constrained buffer identities and determined properties of presynaptic Calcium during trains of action potentials. \r\n\r\nThis published work can be found at: \r\n\r\nEdaeni Hamid, Emily Church and Simon Alford Quantitation and Simulation of Single Action Potential-Evoked Ca2+ Signals in CA1 Pyramidal Neuron Presynaptic Terminals\r\neNeuro 24 September 2019, 6 (5) ENEURO.0343-19.2019; DOI: https://doi.org/10.1523/ENEURO.0343-19.2019",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 826,
- "tag": "MCell"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2805,
- "tag": "ModelDB:263995"
- },
- {
- "id": 1919,
- "tag": "Reaction-diffusion"
- },
- {
- "id": 725,
- "tag": "Synaptic Plasticity"
- }
- ],
- "timestamp_created": "2024-01-12 18:46:51.472259+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/263995",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "2144": {
- "auto_sync": true,
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- "default_context": "main",
- "id": 2144,
- "name": "Spatial coupling tunes NMDA receptor responses via Ca2+ diffusion (Iacobucci and Popescu 2019)",
- "repository_type": "github",
- "summary": "This code implements a coupled markov model for analysis of positive or negative ion channel coupling from measured unitary currents in patch clamp recordings see our paper: Spatial Coupling Tunes NMDA Receptor Responses via Ca2+ Diffusion Gary J. Iacobucci and Gabriela K. Popescu Journal of Neuroscience 6 November 2019, 39 (45) 8831-8844; DOI: https://doi.org/10.1523/JNEUROSCI.0901-19.2019",
- "tags": [
- {
- "id": 793,
- "tag": "Development"
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- "id": 583,
- "tag": "I Calcium"
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- "id": 655,
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- {
- "id": 564,
- "tag": "ModelDB"
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- {
- "id": 2806,
- "tag": "ModelDB:264177"
- },
- {
- "id": 725,
- "tag": "Synaptic Plasticity"
- }
- ],
- "timestamp_created": "2024-01-12 18:46:52.008214+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/264177",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2145": {
- "auto_sync": true,
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- "modeling"
- ],
- "default_context": "master",
- "id": 2145,
- "name": "Fitting predictive coding to the neurophysiological data (Spratling 2019)",
- "repository_type": "github",
- "summary": "MATLAB code for simulating the response properties of V1 mismatch neurons and for testing the ability of predictive coding algorithms to scale. This code performs the experiments described in:\r\nSpratling MW (2019) Abstract:\r\n\"Recent neurophysiological data showing the effects of locomotion on neural activity in mouse primary visual cortex has been interpreted as providing strong support for the predictive coding account of cortical function. Specifically, this work has been interpreted as providing direct evidence that prediction-error, a distinguishing property of predictive coding, is encoded in cortex. This article evaluates these claims and highlights some of the discrepancies between the proposed predictive coding model and the neuro-biology. Furthermore, it is shown that the model can be modified so as to fit the empirical data more successfully.\"\r\n",
- "tags": [
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2807,
- "tag": "ModelDB:264514"
- },
- {
- "id": 1779,
- "tag": "Posture and locomotion"
- },
- {
- "id": 758,
- "tag": "Sensory processing"
- },
- {
- "id": 726,
- "tag": "Vision"
- }
- ],
- "timestamp_created": "2024-01-12 18:46:52.510453+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/264514",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "default_context": "master",
- "id": 2146,
- "name": "Ave. neuron model for slow-wave sleep in cortex Tatsuki 2016 Yoshida 2018 Rasmussen 2017 (all et al)",
- "repository_type": "github",
- "summary": "Averaged neuron(AN) model is a conductance-based (Hodgkin-Huxley type) neuron model which includes a mean-field approximation of a population of neurons. You can simulate previous models (AN model: Tatsuki et al., 2016 and SAN model: Yoshida et al., 2018), and various models with 'X model' based on channel and parameter modules. Also, intracellular and extracellular ion concentration can be taken into consideration using the Nernst equation (See Ramussen et al., 2017).",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 804,
- "tag": "Bifurcation"
- },
- {
- "id": 1527,
- "tag": "Brain Rhythms"
- },
- {
- "id": 566,
- "tag": "Bursting"
- },
- {
- "id": 1684,
- "tag": "Ca pump"
- },
- {
- "id": 572,
- "tag": "Calcium dynamics"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 591,
- "tag": "I K,leak"
- },
- {
- "id": 739,
- "tag": "I Na,p"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 2318,
- "tag": "IK Bkca"
- },
- {
- "id": 2319,
- "tag": "IK Skca"
- },
- {
- "id": 1931,
- "tag": "Kir"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2808,
- "tag": "ModelDB:264519"
- },
- {
- "id": 2058,
- "tag": "Persistent activity"
- },
- {
- "id": 620,
- "tag": "Python"
- },
- {
- "id": 592,
- "tag": "Sleep"
- },
- {
- "id": 2809,
- "tag": "Sleep-Wake transition"
- }
- ],
- "timestamp_created": "2024-01-12 18:46:53.064877+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/264519",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2147": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 2147,
- "name": "MultiScale Optimized Neuronal Intramembrane Cavitation (SONIC) model (Lemaire et al. 2019)",
- "repository_type": "github",
- "summary": "Jupyter Notebooks to reproduce data and figures of the SONIC paper (Lemaire et al. 2019) describing a computationally efficient variant to simulate ultrasound neuromodulation by intramembrane cavitation in cortical neurons.",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2810,
- "tag": "ModelDB:264539"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 620,
- "tag": "Python"
- }
- ],
- "timestamp_created": "2024-01-12 18:46:53.649310+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/264539",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2148": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 2148,
- "name": "A computational model of a small DRG neuron to explore pain (Verma et al. 2019, 2020)",
- "repository_type": "github",
- "summary": "This is a Hodgkin-Huxley type model for a small DRG neuron consisting of four voltage-gated ion channels: sodium channels 1.7 and 1.8, delayed rectifier potassium, and A-type transient potassium channels. This model was used to explore the dynamics of this neuron using bifurcation theory, with the motive to investigate pain since small DRG neuron is a pain-sensing neuron.",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 804,
- "tag": "Bifurcation"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2811,
- "tag": "ModelDB:264591"
- },
- {
- "id": 759,
- "tag": "XPPAUT"
- }
- ],
- "timestamp_created": "2024-01-12 18:46:54.144838+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/264591",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2149": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 2149,
- "name": "Leech Heart Interneuron model (Sharma et al 2020)",
- "repository_type": "github",
- "summary": "Fractional order Leech heart interneuron model is investigated. Different firing properties are explored. \r\nIn this article, we investigate the alternation of spiking and bursting phenomena of an uncoupled and coupled fractional Leech-Heart (L-H) neurons. We show that a complete graph of heterogeneous de-synchronized neurons in the backdrop of diverse memory settings (a mixture of integer and fractional exponents) can eventually lead to bursting with the formation of cluster\r\nsynchronization over a certain threshold of coupling\r\nstrength, however, the uncoupled L-H neurons cannot\r\nreveal bursting dynamics. Using the stability analysis\r\nin fractional domain, we demarcate the parameter\r\nspace where the quiescent or steady-state emerges\r\nin uncoupled L-H neuron. Finally, a reduced-order\r\nmodel is introduced to capture the activities of the\r\nlarge network of fractional-order model neurons.",
- "tags": [
- {
- "id": 804,
- "tag": "Bifurcation"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2812,
- "tag": "ModelDB:264594"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- }
- ],
- "timestamp_created": "2024-01-12 18:46:54.932398+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/264594",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2150": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 2150,
- "name": "Mesoscopic dynamics from AdEx recurrent networks (Zerlaut et al JCNS 2018) (PyNN)",
- "repository_type": "github",
- "summary": "PyNN simulations for Zerlaut et al 2018).",
- "tags": [
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2813,
- "tag": "ModelDB:264597"
- },
- {
- "id": 714,
- "tag": "PyNN"
- },
- {
- "id": 620,
- "tag": "Python"
- },
- {
- "id": 726,
- "tag": "Vision"
- }
- ],
- "timestamp_created": "2024-01-12 18:46:55.443445+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/264597",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2151": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 2151,
- "name": "Synaptic Impairment, Robustness of Excitatory NNs w/ Different Topologies (Mirzakhalili et al 2017)",
- "repository_type": "github",
- "summary": "\"Synaptic deficiencies are a known hallmark of neurodegenerative diseases, but the diagnosis of impaired synapses on the cellular level is not an easy task. Nonetheless, changes in the system-level dynamics of neuronal networks with damaged synapses can be detected using techniques that do not require high spatial resolution. This paper investigates how the structure/topology of neuronal networks influences their dynamics when they suffer from synaptic loss. We study different neuronal network structures/topologies by specifying their degree distributions. The modes of the degree distribution can be used to construct networks that consist of rich clubs and resemble small world networks, as well. We define two dynamical metrics to compare the activity of networks with different structures: persistent activity (namely, the self-sustained activity of the network upon removal of the initial stimulus) and quality of activity (namely, percentage of neurons that participate in the persistent activity of the network). Our results show that synaptic loss affects the persistent activity of networks with bimodal degree distributions less than it affects random networks. ...\"",
- "tags": [
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2814,
- "tag": "ModelDB:264628"
- },
- {
- "id": 2058,
- "tag": "Persistent activity"
- }
- ],
- "timestamp_created": "2024-01-12 18:46:55.961385+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/264628",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2152": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 2152,
- "name": "SCN1A gain-of-function in early infantile encephalopathy (Berecki et al 2019)",
- "repository_type": "github",
- "summary": "\"OBJECTIVE:\r\nTo elucidate the biophysical basis underlying the distinct and severe clinical presentation in patients with the recurrent missense SCN1A variant, p.Thr226Met. Patients with this variant show a well-defined genotype-phenotype correlation and present with developmental and early infantile epileptic encephalopathy that is far more severe than typical SCN1A Dravet syndrome.\r\n\r\nMETHODS:\r\nWhole cell patch clamp and dynamic action potential clamp were used to study T226M Nav 1.1 channels expressed in mammalian cells. Computational modeling was used to explore the neuronal scale mechanisms that account for altered action potential firing.\r\n\r\nRESULTS:\r\nT226M channels exhibited hyperpolarizing shifts of the activation and inactivation curves and enhanced fast inactivation. Dynamic action potential clamp hybrid simulation showed that model neurons containing T226M conductance displayed a left shift in rheobase relative to control. At current stimulation levels that produced repetitive action potential firing in control model neurons, depolarization block and cessation of action potential firing occurred in T226M model neurons. Fully computationally simulated neuron models recapitulated the findings from dynamic action potential clamp and showed that heterozygous T226M models were also more susceptible to depolarization block.\r\n\r\n...\"",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 2592,
- "tag": "BluePyOpt"
- },
- {
- "id": 873,
- "tag": "Depolarization block"
- },
- {
- "id": 793,
- "tag": "Development"
- },
- {
- "id": 469,
- "tag": "Epilepsy"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2815,
- "tag": "ModelDB:264834"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 620,
- "tag": "Python"
- }
- ],
- "timestamp_created": "2024-01-12 18:46:56.494009+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/264834",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2153": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 2153,
- "name": "Opposing roles for Na+/Ca2+ exchange and Ca2+-activated K+ currents during STDP (O`Halloran 2020)",
- "repository_type": "github",
- "summary": "\"Sodium Calcium exchanger (NCX) proteins utilize the electrochemical gradient of Na+ to generate Ca2+ efflux (forward mode) or influx (reverse mode). In mammals, there are three unique NCX encoding genes-NCX1, NCX2, and NCX3, that comprise the SLC8A family, and mRNA from all three exchangers is expressed in hippocampal pyramidal cells. Furthermore, mutant ncx2-/- and ncx3-/- mice have each been shown to exhibit altered long-term potentiation (LTP) in the hippocampal CA1 region due to delayed Ca2+ clearance after depolarization that alters synaptic transmission. In addition to the role of NCX at the synapse of hippocampal subfields required for LTP, the three NCX isoforms have also been shown to localize to the dendrite of hippocampal pyramidal cells. In the case of NCX1, it has been shown to localize throughout the basal and apical dendrite of CA1 neurons where it helps compartmentalize Ca2+ between dendritic shafts and spines. Given the role for NCX and calcium in synaptic plasticity, the capacity of NCX splice-forms to influence backpropagating action potentials has clear consequences for the induction of spike-timing dependent synaptic plasticity (STDP). To explore this, we examined the effect of NCX localization, density, and allosteric activation on forward and back propagating signals and, next employed a STDP paradigm to monitor the effect of NCX on plasticity using back propagating action potentials paired with EPSPs. From our simulation studies we identified a role for the sodium calcium exchange current in normalizing STDP, and demonstrate that NCX is required at the postsynaptic site for this response. We also screened other mechanisms in our model and identified a role for the Ca2+ activated K+ current at the postsynapse in producing STDP responses. Together, our data reveal opposing roles for the Na+/Ca2+ exchanger current and the Ca2+ activated K+ current in setting STDP.\"",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 579,
- "tag": "Active Dendrites"
- },
- {
- "id": 572,
- "tag": "Calcium dynamics"
- },
- {
- "id": 565,
- "tag": "Dendritic Action Potentials"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 749,
- "tag": "Long-term Synaptic Plasticity"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2816,
- "tag": "ModelDB:264842"
- },
- {
- "id": 743,
- "tag": "NEURON (web link to model)"
- },
- {
- "id": 738,
- "tag": "Na/Ca exchanger"
- },
- {
- "id": 802,
- "tag": "STDP"
- },
- {
- "id": 725,
- "tag": "Synaptic Plasticity"
- }
- ],
- "timestamp_created": "2024-01-12 18:46:57.033099+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/264842",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2154": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 2154,
- "name": "Neuromechanical Model of Rat Hindlimb Walking with Two-Layer CPGs (Deng et al, 2019)",
- "repository_type": "github",
- "summary": "A neuromechanical model of the rat hindlimb and locomotor circuitry built and run in AnimatLab v1. We use separate rhythm generators and pattern formation layers to activate antagonistic muscle pairs about each joint in the sagittal plane. The model replicates the resetting and non-resetting deletions observed in the animal.",
- "tags": [
- {
- "id": 1776,
- "tag": "AnimatLab v1"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2817,
- "tag": "ModelDB:264844"
- },
- {
- "id": 1966,
- "tag": "Motor control"
- },
- {
- "id": 720,
- "tag": "Temporal Pattern Generation"
- }
- ],
- "timestamp_created": "2024-01-12 18:46:57.572749+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/264844",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2155": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 2155,
- "name": "Global and multiplexed dendritic computations under in vivo-like conditions (Ujfalussy et al 2018)",
- "repository_type": "github",
- "summary": "\"The input-output transformation of neurons under in vivo conditions is unknown. Ujfalussy et al. use a model-based approach to show that linear integration with a single global dendritic nonlinearity can accurately predict the\r\nresponse of neurons to naturalistic synaptic input patterns.\"",
- "tags": [
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2818,
- "tag": "ModelDB:265511"
- },
- {
- "id": 743,
- "tag": "NEURON (web link to model)"
- },
- {
- "id": 853,
- "tag": "Python (web link to model)"
- },
- {
- "id": 1440,
- "tag": "R (web link to model)"
- },
- {
- "id": 569,
- "tag": "Simplified Models"
- }
- ],
- "timestamp_created": "2024-01-12 18:46:58.081034+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/265511",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2156": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 2156,
- "name": "Hippocampus CA1 Interneuron Specific 3 (IS3) in vivo-like virtual NN simulations (Luo et al 2020)",
- "repository_type": "github",
- "summary": "\"Disinhibition is a widespread circuit mechanism for information selection and transfer. In the hippocampus, disinhibition of principal cells is provided by the interneuron-specific interneurons that express the vasoactive intestinal polypeptide (VIP-IS) and innervate selectively inhibitory interneurons. By combining optophysiological experiments with computational models, we determined the impact of synaptic inputs onto the network state-dependent recruitment of VIP-IS cells. We found that VIP-IS cells fire spikes in response to both the Schaffer collateral and the temporoammonic pathway activation. Moreover, by integrating their intrinsic and synaptic properties into computational models, we predicted recruitment of these cells between the rising phase and peak of theta oscillation and during ripples. Two-photon Ca2+-imaging in awake mice supported in part the theoretical predictions, revealing a significant speed modulation of VIP-IS cells and their preferential albeit delayed recruitment during theta-run epochs, with estimated firing at the rising phase and peak of the theta cycle. However, it also uncovered that VIP-IS cells are not activated during ripples. Thus, given the preferential theta-modulated firing of VIP-IS cells in awake hippocampus, we postulate that these cells may be important for information gating during spatial navigation and memory encoding.\"",
- "tags": [
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 739,
- "tag": "I Na,p"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2819,
- "tag": "ModelDB:265523"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 800,
- "tag": "Spatial Navigation"
- }
- ],
- "timestamp_created": "2024-01-12 18:46:58.586825+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/265523",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2157": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 2157,
- "name": "Mean-field models of neural populations under electrical stimulation (Cakan & Obermayer 2020)",
- "repository_type": "github",
- "summary": "Weak electrical inputs to the brain in vivo using transcranial electrical stimulation or in isolated cortex in vitro can affect the dynamics of the underlying neural populations. However, it is poorly understood what the exact mechanisms are that modulate the activity of neural populations as a whole and why the responses are so diverse in stimulation experiments. Despite this, electrical stimulation techniques are being developed for the treatment of neurological diseases in humans. To better understand these interactions, it is often necessary to simulate and analyze very large networks of neurons, which can be computationally demanding. In this theoretical paper, we present a reduced model of coupled neural populations that represents a piece of cortical tissue. This efficient model retains the dynamical properties of the large network of neurons it is based on while being several orders of magnitude faster to simulate. Due to the biophysical properties of the neuron model, an electric field can be coupled to the population. We show that weak electric fields often used in stimulation experiments can lead to entrainment of neural oscillations on the population level, and argue that the responses critically depend on the dynamical state of the neural system.",
- "tags": [
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 804,
- "tag": "Bifurcation"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2820,
- "tag": "ModelDB:265528"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 2821,
- "tag": "neurolib (web link to model)"
- }
- ],
- "timestamp_created": "2024-01-12 18:46:59.120438+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/265528",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2158": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 2158,
- "name": "The microcircuits of striatum in silico (Hjorth et al 2020)",
- "repository_type": "github",
- "summary": "\"Our aim is to reconstruct a full-scale mouse striatal cellular level model to provide a framework to integrate and interpret striatal data. We represent the main striatal neuronal subtypes, the two types of projection neurons (dSPNs and iSPNs) giving rise to the direct and indirect pathways, the fast-spiking interneurons, the low threshold spiking interneurons, and the cholinergic interneurons as detailed compartmental models, with properties close to their biological counterparts. Both intrastriatal and afferent synaptic inputs (cortex, thalamus, dopamine system) are optimized against existing data, including short-term plasticity. This model platform will be used to generate new hypotheses on striatal function or network dynamic phenomena.\"",
- "tags": [
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 730,
- "tag": "I A, slow"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 721,
- "tag": "I N"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 843,
- "tag": "I Q"
- },
- {
- "id": 844,
- "tag": "I R"
- },
- {
- "id": 575,
- "tag": "I T low threshold"
- },
- {
- "id": 1931,
- "tag": "Kir"
- },
- {
- "id": 756,
- "tag": "Methods"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2822,
- "tag": "ModelDB:265540"
- },
- {
- "id": 743,
- "tag": "NEURON (web link to model)"
- },
- {
- "id": 2823,
- "tag": "Snudda (web link to model)"
- }
- ],
- "timestamp_created": "2024-01-12 18:46:59.652262+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/265540",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2159": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 2159,
- "name": "Cerebellar granule cell (Masoli et al 2020)",
- "repository_type": "github",
- "summary": "\"The cerebellar granule cells (GrCs) are classically described as a homogeneous neuronal population discharging \r\nregularly without adaptation. We show that GrCs in fact generate diverse response patterns to current injection \r\nand synaptic activation, ranging from adaptation to acceleration of firing. Adaptation was predicted by parameter \r\noptimization in detailed computational models based on available knowledge on GrC ionic channels. The models also \r\npredicted that acceleration required additional mechanisms. We found that yet unrecognized TRPM4 currents specifically \r\naccounted for firing acceleration and that adapting GrCs outperformed accelerating GrCs in transmitting high-frequency \r\nmossy fiber (MF) bursts over a background discharge. This implied that GrC subtypes identified by their \r\nelectroresponsiveness corresponded to specific neurotransmitter release probability values. Simulations showed \r\nthat fine-tuning of pre- and post-synaptic parameters generated effective MF-GrC transmission channels, which \r\ncould enrich the processing of input spike patterns and enhance spatio-temporal recoding at the cerebellar input stage.\"",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 1684,
- "tag": "Ca pump"
- },
- {
- "id": 572,
- "tag": "Calcium dynamics"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 1532,
- "tag": "I Na, leak"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2824,
- "tag": "ModelDB:265584"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 620,
- "tag": "Python"
- },
- {
- "id": 596,
- "tag": "Synaptic Integration"
- }
- ],
- "timestamp_created": "2024-01-12 18:47:00.184195+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/265584",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2160": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 2160,
- "name": "Single-cell comprehensive biophysical model of SN pars compacta (Muddapu & Chakravarthy 2021)",
- "repository_type": "github",
- "summary": "Parkinson\u2019s disease (PD) is caused by the loss of dopaminergic cells in substantia nigra pars compacta (SNc), the decisive cause of this inexorable cell loss is not clearly elucidated. We hypothesize that \u201cEnergy deficiency at a sub-cellular/cellular/systems-level can be a common underlying cause for SNc cell loss in PD.\u201d Here, we propose a comprehensive computational model of SNc cell which helps us to understand the pathophysiology of neurodegeneration at subcellular-level in PD. We were able to show see how deficits in supply of energy substrates (glucose and oxygen) lead to a deficit in ATP, and furthermore, deficits in ATP are the common factor underlying the pathological molecular-level changes including alpha-synuclein aggregation, ROS formation, calcium elevation, and dopamine dysfunction. The model also suggests that hypoglycemia plays a more crucial role in leading to ATP deficits than hypoxia. We believe that the proposed model provides an integrated modelling framework to understand the neurodegenerative processes underlying PD.",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 1662,
- "tag": "Apoptosis"
- },
- {
- "id": 1684,
- "tag": "Ca pump"
- },
- {
- "id": 572,
- "tag": "Calcium dynamics"
- },
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 75,
- "tag": "Homeostasis"
- },
- {
- "id": 730,
- "tag": "I A, slow"
- },
- {
- "id": 1560,
- "tag": "I Ca,p"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 1532,
- "tag": "I Na, leak"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 817,
- "tag": "I_Na,Ca"
- },
- {
- "id": 818,
- "tag": "I_SERCA"
- },
- {
- "id": 1931,
- "tag": "Kir"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 767,
- "tag": "MATLAB (web link to model)"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2825,
- "tag": "ModelDB:265591"
- },
- {
- "id": 738,
- "tag": "Na/Ca exchanger"
- },
- {
- "id": 2599,
- "tag": "Neurotransmitter dynamics"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 2236,
- "tag": "Pacemaking mechanism"
- },
- {
- "id": 801,
- "tag": "Parkinson's"
- },
- {
- "id": 787,
- "tag": "Pathophysiology"
- }
- ],
- "timestamp_created": "2024-01-12 18:47:00.732333+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/265591",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2161": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 2161,
- "name": "Systematic integration of data into multi-scale models of mouse primary V1 (Billeh et al 2020)",
- "repository_type": "github",
- "summary": "\"Highlights\r\n\u2022\r\nTwo network models of the mouse primary visual cortex are developed and released\r\n\r\n\u2022\r\nOne uses compartmental-neuron models and the other point-neuron models\r\n\r\n\u2022\r\nThe models recapitulate observations from in vivo experimental data\r\n\r\n\u2022\r\nSimulations identify experimentally testable predictions about cortex circuitry\"",
- "tags": [
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 842,
- "tag": "I Krp"
- },
- {
- "id": 589,
- "tag": "I L high threshold"
- },
- {
- "id": 580,
- "tag": "I M"
- },
- {
- "id": 739,
- "tag": "I Na,p"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 575,
- "tag": "I T low threshold"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2826,
- "tag": "ModelDB:265592"
- },
- {
- "id": 1969,
- "tag": "NEST (web link to model)"
- },
- {
- "id": 743,
- "tag": "NEURON (web link to model)"
- },
- {
- "id": 569,
- "tag": "Simplified Models"
- },
- {
- "id": 726,
- "tag": "Vision"
- }
- ],
- "timestamp_created": "2024-01-12 18:47:01.311703+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/265592",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2162": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 2162,
- "name": "NeuroMatic: software for acquisition, analysis and simulation of e-phys data (Rothman & Silver 2018)",
- "repository_type": "github",
- "summary": "\"Acquisition, analysis and simulation of electrophysiological properties of the nervous system require multiple software packages. This makes it difficult to conserve experimental metadata and track the analysis performed. It also complicates certain experimental approaches such as online analysis. To address this, we developed NeuroMatic, an open-source software toolkit that performs data acquisition (episodic, continuous and triggered recordings), data analysis (spike rasters, spontaneous event detection, curve fitting, stationarity) and simulations (stochastic synaptic transmission, synaptic short-term plasticity, integrate-and-fire and Hodgkin-Huxley-like single-compartment models). The merging of a wide range of tools into a single package facilitates a more integrated style of research, from the development of online analysis functions during data acquisition, to the simulation of synaptic conductance trains during dynamic-clamp experiments. Moreover, NeuroMatic has the advantage of working within Igor Pro, a platform-independent environment that includes an extensive library of built-in functions, a history window for reviewing the user's workflow and the ability to produce publication-quality graphics. ...\"",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 2827,
- "tag": "IGOR Pro (web link to model)"
- },
- {
- "id": 756,
- "tag": "Methods"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2828,
- "tag": "ModelDB:266415"
- },
- {
- "id": 724,
- "tag": "Short-term Synaptic Plasticity"
- },
- {
- "id": 569,
- "tag": "Simplified Models"
- },
- {
- "id": 725,
- "tag": "Synaptic Plasticity"
- }
- ],
- "timestamp_created": "2024-01-12 18:47:01.929196+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/266415",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2163": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 2163,
- "name": "Cholinergic and nicotinic regulation of DA neuron firing (Morozova et al 2020)",
- "repository_type": "github",
- "summary": "The model describes the modulation of firing properties of DA neurons by acetylcholine (ACh) and nicotine in 5 cases: knock-out of \u00df2-containing nAChRs, \u00df2-containing nAChRs only on DA neurons, the nAChRs only on GABA neurons, the nAChRs on both DA and GABA neurons and \u201cwild\u201d type (the AChRs on DA, GABA and Glu neurons). The distinct responses to ACh and nicotine could be explained by distinct temporal patterns of these inputs: pulsatile vs. continuous.",
- "tags": [
- {
- "id": 566,
- "tag": "Bursting"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2829,
- "tag": "ModelDB:266419"
- }
- ],
- "timestamp_created": "2024-01-12 18:47:02.546920+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/266419",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2164": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 2164,
- "name": "Inhibitory network bistability explains increased activity prior to seizure onset (Rich et al 2020)",
- "repository_type": "github",
- "summary": "\" ... the mechanisms predisposing an inhibitory network toward increased activity, specifically prior to ictogenesis, without a permanent change to inputs to the system remain unknown. We address this question by comparing simulated inhibitory networks containing control interneurons and networks containing hyperexcitable interneurons modeled to mimic treatment with 4-Aminopyridine (4-AP), an agent commonly used to model seizures in vivo and in vitro. Our in silico study demonstrates that model inhibitory networks with 4-AP interneurons are more prone than their control counterparts to exist in a bistable state in which asynchronously firing networks can abruptly transition into synchrony driven by a brief perturbation. This transition into synchrony brings about a corresponding increase in overall firing rate. We further show that perturbations driving this transition could arise in vivo from background excitatory synaptic activity in the cortex. Thus, we propose that bistability explains the increase in interneuron activity observed experimentally prior to seizure via a transition from incoherent to coherent dynamics. Moreover, bistability explains why inhibitory networks containing hyperexcitable interneurons are more vulnerable to this change in dynamics, and how such networks can undergo a transition without a permanent change in the drive. ...\"",
- "tags": [
- {
- "id": 755,
- "tag": "C or Cplusplus program"
- },
- {
- "id": 469,
- "tag": "Epilepsy"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2830,
- "tag": "ModelDB:266435"
- },
- {
- "id": 586,
- "tag": "Synchronization"
- }
- ],
- "timestamp_created": "2024-01-12 18:47:03.060506+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/266435",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2165": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 2165,
- "name": "Electrical compartmentalization in neurons (Wybo et al 2019)",
- "repository_type": "github",
- "summary": "\"The dendritic tree of neurons plays an important role in information processing in the brain. While it is thought that dendrites require independent subunits to perform most of their computations, it is still not understood how they compartmentalize into functional subunits. Here, we show how these subunits can be deduced from the properties of dendrites. We devised a formalism that links the dendritic arborization to an impedance-based tree graph and show how the topology of this graph reveals independent subunits. This analysis reveals that cooperativity between synapses decreases slowly with increasing electrical separation and thus that few independent subunits coexist. We nevertheless find that balanced inputs or shunting inhibition can modify this topology and increase the number and size of the subunits in a context-dependent manner. We also find that this dynamic recompartmentalization can enable branch-specific learning of stimulus features. Analysis of dendritic patch-clamp recording experiments confirmed our theoretical predictions.\"",
- "tags": [
- {
- "id": 776,
- "tag": "C or Cplusplus program (web link to model)"
- },
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 570,
- "tag": "Influence of Dendritic Geometry"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2831,
- "tag": "ModelDB:266488"
- },
- {
- "id": 743,
- "tag": "NEURON (web link to model)"
- },
- {
- "id": 853,
- "tag": "Python (web link to model)"
- },
- {
- "id": 596,
- "tag": "Synaptic Integration"
- },
- {
- "id": 725,
- "tag": "Synaptic Plasticity"
- }
- ],
- "timestamp_created": "2024-01-12 18:47:03.581890+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/266488",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2166": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 2166,
- "name": "Neural recruitment during synchronous multichannel microstimulation (Hokanson et al 2018)",
- "repository_type": "github",
- "summary": "\" ...The effects of field interactions on neuronal recruitment depend on several factors, which have been studied extensively at the macro-scale but have been overlooked in the case of high density arrays. Here, we report that field interactions can significantly affect neural recruitment, even with low amplitude stimulation. We created a computational model of peripheral nerve axons to estimate stimulation parameters sufficient to generate neural recruitment during synchronous and asynchronous stimulation on two microelectrodes located within the peripheral nerve. Across a range of stimulus amplitudes, the model predicted that synchronous stimulation on adjacent electrodes (400 \u00b5m separation), would recruit 2-3 times more neurons than during asynchronous stimulation. ...\"",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 767,
- "tag": "MATLAB (web link to model)"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2832,
- "tag": "ModelDB:266492"
- },
- {
- "id": 743,
- "tag": "NEURON (web link to model)"
- }
- ],
- "timestamp_created": "2024-01-12 18:47:04.115825+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/266492",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2167": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 2167,
- "name": "Beta-cell hubs maintain Ca2+ oscillations in human and mouse islet simulations (Lei et al 2018)",
- "repository_type": "github",
- "summary": "\"Islet \u00df-cells are responsible for secreting all circulating insulin in response to rising plasma glucose concentrations. These cells are a phenotypically diverse population that express great functional heterogeneity. In mice, certain \u00df-cells (termed 'hubs') have been shown to be crucial for dictating the islet response to high glucose, with inhibition of these hub cells abolishing the coordinated Ca2+ oscillations necessary for driving insulin secretion. These \u00df-cell hubs were found to be highly metabolic and susceptible to pro-inflammatory and glucolipotoxic insults. In this study, we explored the importance of hub cells in human by constructing mathematical models of Ca2+ activity in human islets. Our simulations revealed that hubs dictate the coordinated Ca2+ response in both mouse and human islets; silencing a small proportion of hubs abolished whole-islet Ca2+ activity. We also observed that if hubs are assumed to be preferentially gap junction coupled, then the simulations better adhere to the available experimental data. Our simulations of 16 size-matched mouse and human islet architectures revealed that there are species differences in the role of hubs; ...\"",
- "tags": [
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2833,
- "tag": "ModelDB:266497"
- },
- {
- "id": 743,
- "tag": "NEURON (web link to model)"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 853,
- "tag": "Python (web link to model)"
- }
- ],
- "timestamp_created": "2024-01-12 18:47:04.615691+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/266497",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2168": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 2168,
- "name": "Excitation Properties of Computational Models of Unmyelinated Peripheral Axons (Pelot et al., 2021)",
- "repository_type": "github",
- "summary": "We implemented the single-compartment model of vagal afferents from Schild et al. 1994 and extended the model into a multi-compartment axon, presenting the first C-fiber cable model of a C-fiber vagal afferent. We also implemented the updated parameters from Schild and Kunze 1997. We compared the responses of these novel models to three published models of unmyelinated axons (Rattay and Aberham 1993; Sundt et al. 2015; Tigerholm et al. 2014).",
- "tags": [
- {
- "id": 2255,
- "tag": "Brian 2"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2834,
- "tag": "ModelDB:266498"
- },
- {
- "id": 577,
- "tag": "NEURON"
- }
- ],
- "timestamp_created": "2024-01-12 18:47:05.116561+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/266498",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2169": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 2169,
- "name": "On the structural connectivity of large-scale models of brain networks (Giacopelli et al 2021)",
- "repository_type": "github",
- "summary": "The brain\u2019s structural connectivity plays a fundamental role in determining how neuron networks\r\ngenerate, process, and transfer information within and between brain regions. The underlying\r\nmechanisms are extremely difficult to study experimentally and, in many cases, large-scale model\r\nnetworks are of great help. However, the implementation of these models relies on experimental\r\nfindings that are often sparse and limited. Their predicting power ultimately depends on how closely\r\na model\u2019s connectivity represents the real system. Here we argue that the data-driven probabilistic\r\nrules, widely used to build neuronal network models, may not be appropriate to represent the\r\ndynamics of the corresponding biological system. To solve this problem, we propose to use a\r\nnew mathematical framework able to use sparse and limited experimental data to quantitatively\r\nreproduce the structural connectivity of biological brain networks at cellular level.",
- "tags": [
- {
- "id": 855,
- "tag": "Connectivity matrix"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2835,
- "tag": "ModelDB:266506"
- },
- {
- "id": 611,
- "tag": "NEST"
- }
- ],
- "timestamp_created": "2024-01-12 18:47:05.625222+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/266506",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2170": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 2170,
- "name": "Kernel method to calculate LFPs from networks of point neurons (Telenczuk et al 2020)",
- "repository_type": "github",
- "summary": "\"The local field potential (LFP) is usually calculated from current sources arising from transmembrane currents, in particular in asymmetric cellular morphologies such as pyramidal neurons. Here, we adopt a different point of view and relate the spiking of neurons to the LFP through efferent synaptic connections and provide a method to calculate LFPs. We show that the so-called unitary LFPs (uLFP) provide the key to such a calculation. We show experimental measurements and simulations of uLFPs in neocortex and hippocampus, for both excitatory and inhibitory neurons. We fit a \u201ckernel\u201d function to measurements of uLFPs, and we estimate its spatial and temporal spread by using simulations of morphologically detailed reconstructions of hippocampal pyramidal neurons. Assuming that LFPs are the sum of uLFPs generated by every neuron in the network, the LFP generated by excitatory and inhibitory neurons can be calculated by convolving the trains of action potentials with the kernels estimated from uLFPs. This provides a method to calculate the LFP from networks of spiking neurons, even for point neurons for which the LFP is not easily defined. We show examples of LFPs calculated from networks of point neurons.\"",
- "tags": [
- {
- "id": 734,
- "tag": "Extracellular Fields"
- },
- {
- "id": 756,
- "tag": "Methods"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2836,
- "tag": "ModelDB:266508"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 620,
- "tag": "Python"
- }
- ],
- "timestamp_created": "2024-01-12 18:47:06.153370+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/266508",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2171": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 2171,
- "name": "Combining modeling, deep learning for MEA neuron localization, classification (Buccino et al 2018)",
- "repository_type": "github",
- "summary": "\"Neural circuits typically consist of many different types of neurons, and one faces a challenge in disentangling their individual contributions in measured neural activity. Classification of cells into inhibitory and excitatory neurons and localization of neurons on the basis of extracellular recordings are frequently employed procedures. Current approaches, however, need a lot of human intervention, which makes them slow, biased, and unreliable. In light of recent advances in deep learning techniques and exploiting the availability of neuron models with quasi-realistic three-dimensional morphology and physiological properties, we present a framework for automatized and objective classification and localization of cells based on the spatiotemporal profiles of the extracellular action potentials recorded by multielectrode arrays. We train convolutional neural networks on simulated signals from a large set of cell models and show that our framework can predict the position of neurons with high accuracy, more precisely than current state-of-the-art methods. Our method is also able to classify whether a neuron is excitatory or inhibitory with very high accuracy, substantially improving on commonly used clustering techniques. ...\"",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 2837,
- "tag": "LFPy (web link to model)"
- },
- {
- "id": 825,
- "tag": "Learning"
- },
- {
- "id": 756,
- "tag": "Methods"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2838,
- "tag": "ModelDB:266518"
- },
- {
- "id": 743,
- "tag": "NEURON (web link to model)"
- },
- {
- "id": 853,
- "tag": "Python (web link to model)"
- }
- ],
- "timestamp_created": "2024-01-12 18:47:06.659689+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/266518",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2172": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 2172,
- "name": "A model for focal seizure onset, propagation, evolution, and progression (Liou et al 2020)",
- "repository_type": "github",
- "summary": "We developed a neural network model that can account for major elements common\r\nto human focal seizures. These include the tonic-clonic transition, slow advance of clinical semiology\r\nand corresponding seizure territory expansion, widespread EEG synchronization, and slowing of\r\nthe ictal rhythm as the seizure approaches termination. These were reproduced by incorporating\r\nusage-dependent exhaustion of inhibition in an adaptive neural network that receives global\r\nfeedback inhibition in addition to local recurrent projections. Our model proposes mechanisms that\r\nmay underline common EEG seizure onset patterns and status epilepticus, and postulates a role for\r\nsynaptic plasticity in the emergence of epileptic foci. Complex patterns of seizure activity and bi-\r\nstable seizure end-points arise when stochastic noise is included. With the rapid advancement of\r\nclinical and experimental tools, we believe that this model can provide a roadmap and potentially\r\nan in silico testbed for future explorations of seizure mechanisms and clinical therapies.",
- "tags": [
- {
- "id": 469,
- "tag": "Epilepsy"
- },
- {
- "id": 734,
- "tag": "Extracellular Fields"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 1433,
- "tag": "I_AHP"
- },
- {
- "id": 767,
- "tag": "MATLAB (web link to model)"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2839,
- "tag": "ModelDB:266524"
- },
- {
- "id": 725,
- "tag": "Synaptic Plasticity"
- },
- {
- "id": 586,
- "tag": "Synchronization"
- }
- ],
- "timestamp_created": "2024-01-12 18:47:07.158918+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/266524",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2173": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 2173,
- "name": "Dynamical assessment of ion channels during in vivo-like states (Guet-McCreight & Skinner 2020)",
- "repository_type": "github",
- "summary": "\" ... Methods: We employ two morphologically-detailed multi-compartment models of a specific type of inhibitory interneuron, the oriens lacunosum moleculare (OLM) cell. The OLM cell is a well-studied cell type in CA1 hippocampus that is important in gating sensory and contextual information. We create in vivo-like states for these cellular models by including levels of synaptic bombardment that would occur in vivo. Using visualization tools and analyses we assess the ion channel current contribution profile across the different somatic and dendritic compartments of the models.\r\nResults: We identify changes in dendritic excitability, ion channel current contributions and co-activation patterns between in vitro and in vivo-like states. Primarily, we find that the relative timing between ion channel currents are mostly invariant between states, but exhibit changes in magnitudes and decreased propagation across dendritic compartments. We also find enhanced dendritic hyperpolarization-activated cyclic nucleotide-gated channel (h-channel) activation during in vivo-like states, which suggests that dendritically located h-channels are functionally important in altering signal propagation in the behaving animal. ...\"",
- "tags": [
- {
- "id": 579,
- "tag": "Active Dendrites"
- },
- {
- "id": 565,
- "tag": "Dendritic Action Potentials"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 589,
- "tag": "I L high threshold"
- },
- {
- "id": 580,
- "tag": "I M"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 575,
- "tag": "I T low threshold"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2840,
- "tag": "ModelDB:266526"
- },
- {
- "id": 743,
- "tag": "NEURON (web link to model)"
- }
- ],
- "timestamp_created": "2024-01-12 18:47:07.740175+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/266526",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2174": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 2174,
- "name": "Two forms of synaptic depression by neuromodulation of presynaptic Ca2+ channels (Burke et al 2018)",
- "repository_type": "github",
- "summary": "\"... To determine whether the different biophysical mechanisms of\r\nCaV modulation predicted by OFA (Optical Fluctuation Analysis) are sufficient to explain the\r\ndiffering effects of D1Rs and GABA B Rs on STP, we developed\r\na reduced synaptic model...\"",
- "tags": [
- {
- "id": 572,
- "tag": "Calcium dynamics"
- },
- {
- "id": 723,
- "tag": "Facilitation"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2841,
- "tag": "ModelDB:266534"
- },
- {
- "id": 853,
- "tag": "Python (web link to model)"
- },
- {
- "id": 724,
- "tag": "Short-term Synaptic Plasticity"
- },
- {
- "id": 725,
- "tag": "Synaptic Plasticity"
- }
- ],
- "timestamp_created": "2024-01-12 18:47:08.269872+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/266534",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2175": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 2175,
- "name": "Interplay between somatic and dendritic inhibition promotes place fields (Pedrosa & Clopath 2020)",
- "repository_type": "github",
- "summary": "Hippocampal pyramidal neurons are thought to encode spatial information. A subset of these cells, named place cells, are active only when the animal traverses a specific region within the environment. Although vastly studied experimentally, the development and stabilization of place fields are not fully understood. Here, we propose a mechanistic model of place cell formation in the hippocampal CA1 region. Using our model, we reproduce place field dynamics observed experimentally and provide a mechanistic explanation for the stabilization of place fields. Finally, our model provides specific predictions on protocols to shift place field location.",
- "tags": [
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2842,
- "tag": "ModelDB:266535"
- },
- {
- "id": 799,
- "tag": "Place cell/field"
- },
- {
- "id": 620,
- "tag": "Python"
- },
- {
- "id": 725,
- "tag": "Synaptic Plasticity"
- }
- ],
- "timestamp_created": "2024-01-12 18:47:08.785153+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/266535",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2176": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 2176,
- "name": "Stochastic Hodgkin-Huxley Model: 14x28D Langevin Simulation (Pu and Thomas, 2020).",
- "repository_type": "github",
- "summary": "This model provides a natural 14-dimensional Langevin dynamics for the Hodgkin Huxley system in which each directed edge in the ion channel state transition graph acts as an independent noise source, leading to a 14 dimensional state space (1 dimension for voltage, 5 for potassium and 8 for sodium) and 14 \u00d7 28 noise coefficient matrix S. In [Pu and Thomas (2020) Neural Computation] we show that this 14 x 28 dimensional model is pathwise equivalent to the 14 x 11 dimensional Langevin model proposed in [Fox and Lu (1994) Phys Rev E], as well as an 14 x 14 model described in [Orio and Soudry (2012) PLoS One]. Unlike Fox and Lu's model, our construction does not require a matrix root extraction step, and runs significantly faster. Unlike Orio and Soudry's model, each directed edge acts as an independent noise source, which facilitates the application of stochastic shielding methods for even greater simulation speed. For comparison, we provide implementations of the following models: 1. Discrete-state Markov chain model (slow, but provides the \"gold standard\" model), adapted from [Goldwyn and Shea-Brown (2011) PLoS Comp. Biol.] 2. 14 x 11 Langevin model from [Fox and Lu (1994) Phys. Rev. E]. (We implement versions with three different boundary conditions: open boundaries, reflecting boundaries, and resampling/rejection at the boundaries.) 3. 4 x 3 Langevin model from [Fox (1997) Biophys. J.] 4. 14 x 13 Langevin model from [Goldwyn and Shea (2011) PLoS Comp. Biol.] 5. 14 x 14 Langevin model from [Dangerfield et al (2012) Phys. Rev. E] 6. 14 x 14 Langevin model from [Orio and Soudry (2012) PLoS One] 7. 14 x 28 Langevin model from [Pu and Thomas (2020) Neural Computation] implemented both with and without stochastic shielding 8. 14 x 0 deterministic HH model (also from [Pu and Thomas (2020) Neural Computation], with the full 14 dimensional state space but no noise) The Read_me.md file provides more detailed simulations.\r\n\r\nTo cite the code: Pu, Shusen, and Peter J. Thomas. \"Fast and Accurate Langevin Simulations of Stochastic Hodgkin-Huxley Dynamics.\" Neural Computation 32, 1775\u20131835 (2020)\r\n",
- "tags": [
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 1532,
- "tag": "I Na, leak"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2843,
- "tag": "ModelDB:266551"
- },
- {
- "id": 1576,
- "tag": "Stochastic simulation"
- }
- ],
- "timestamp_created": "2024-01-12 18:47:09.338154+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/266551",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2177": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 2177,
- "name": "Disrupted information processing in Fmr1-KO mouse layer 4 barrel cortex (Domanski et al 2019)",
- "repository_type": "github",
- "summary": "\"Sensory hypersensitivity is a common and debilitating feature of neurodevelopmental disorders such as Fragile X Syndrome (FXS). How developmental changes in neuronal function\r\nculminate in network dysfunction that underlies sensory hypersensitivities is unknown. By\r\nsystematically studying cellular and synaptic properties of layer 4 neurons combined with\r\ncellular and network simulations, we explored how the array of phenotypes in Fmr1-knockout\r\n(KO) mice produce circuit pathology during development. We show that many of the cellular\r\nand synaptic pathologies in Fmr1-KO mice are antagonistic, mitigating circuit dysfunction, and\r\nhence may be compensatory to the primary pathology. Overall, the layer 4 network in the\r\nFmr1-KO exhibits significant alterations in spike output in response to thalamocortical input\r\nand distorted sensory encoding. This developmental loss of layer 4 sensory encoding precision would contribute to subsequent developmental alterations in layer 4-to-layer 2/3\r\nconnectivity and plasticity observed in Fmr1-KO mice, and circuit dysfunction underlying\r\nsensory hypersensitivity.\"",
- "tags": [
- {
- "id": 793,
- "tag": "Development"
- },
- {
- "id": 767,
- "tag": "MATLAB (web link to model)"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2844,
- "tag": "ModelDB:266552"
- },
- {
- "id": 743,
- "tag": "NEURON (web link to model)"
- },
- {
- "id": 821,
- "tag": "Sensory coding"
- },
- {
- "id": 724,
- "tag": "Short-term Synaptic Plasticity"
- },
- {
- "id": 569,
- "tag": "Simplified Models"
- },
- {
- "id": 725,
- "tag": "Synaptic Plasticity"
- }
- ],
- "timestamp_created": "2024-01-12 18:47:09.981704+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/266552",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2178": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 2178,
- "name": "Entrainment and divisive inhibition in a neocortical neural mass model (Papasavvas et al 2020)",
- "repository_type": "github",
- "summary": "Neural mass model of a neocortical microcircuit featuring one excitatory and two inhibitory populations. The inhibitory populations represent the soma-targeting (parvalbumin) and dendrite-targeting (somatostatin) interneurons. The model uses the Wilson-Cowan formalism and differentiates between the two inhibitory populations by the way they modulate the input-output function of the excitatory population (subtractive vs divisive inhibition, based on Wilson et al., Nature, 7411, 488, 343-348, 2012). The connectivity patterns between the populations follow the patterns reported in the primary visual cortex (Pfeffer et al., Nat Neurosci 16, 1068\u20131076, 2013).\r\n\r\nThe model is used here to investigate the role of divisive inhibition during the entrainment of the microcircuit.",
- "tags": [
- {
- "id": 1810,
- "tag": "Contrast-gain control"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2845,
- "tag": "ModelDB:266555"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- }
- ],
- "timestamp_created": "2024-01-12 18:47:10.580818+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/266555",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2179": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 2179,
- "name": "Binocular energy model set for binocular neurons in optic lobe of praying mantis (Rosner et al 2019)",
- "repository_type": "github",
- "summary": "This is a version of the binocular energy model with parameters chosen to reproduce individual cells in praying mantis optic lobe. The receptive fields are very coarsely sampled (6 different horizontal locations only) to match the coarse sampling of the data given very limited recording time.",
- "tags": [
- {
- "id": 2846,
- "tag": "Binocular energy model/Stereopsis"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 767,
- "tag": "MATLAB (web link to model)"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2847,
- "tag": "ModelDB:266560"
- },
- {
- "id": 569,
- "tag": "Simplified Models"
- }
- ],
- "timestamp_created": "2024-01-12 18:47:11.107558+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/266560",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2180": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 2180,
- "name": "Wilson-Cowan Network with Homeostatic Plasticity (Nicola and Campbell 2021)",
- "repository_type": "github",
- "summary": "We investigate the problem of inter-region synchronization in networks of Wilson--Cowan/neural field equations with homeostatic plasticity, each of which acts as a model for an isolated brain region. We consider arbitrary connection profiles with only one constraint: the rows of the connection matrices are all identically normalized. We found that these systems often synchronize to the solution obtained from a single, self-coupled neural region. We analyze the stability of this solution through a straightforward modification of the master stability function (MSF) approach and found that synchronized solutions lose stability for connectivity matrices when the second largest positive eigenvalue is sufficiently large for values of the global coupling parameter that are not too large. This result was numerically confirmed for ring systems and lattices and was also robust to small amounts of heterogeneity in the homeostatic set points in each node. Finally, we tested this result on connectomes obtained from 196 subjects over a broad age range (4--85 years) from the Human Connectome Project.",
- "tags": [
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2848,
- "tag": "ModelDB:266577"
- },
- {
- "id": 586,
- "tag": "Synchronization"
- }
- ],
- "timestamp_created": "2024-01-12 18:47:11.651314+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/266577",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2181": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 2181,
- "name": "Molecular layer interneurons in cerebellum encode valence in associative learning (Ma et al 2020)",
- "repository_type": "github",
- "summary": "We used two-photon microscopy to study the role of ensembles of cerebellar molecular layer interneurons (MLIs) in a go-no go task where mice obtain a sugar water reward. In order to begin understanding the circuit basis of our findings in changes in lick behavior with chemogenetics in the go-no go associative learning olfactory discrimination task we generated a simple computational model of MLI interaction with PCs.",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2849,
- "tag": "ModelDB:266578"
- },
- {
- "id": 577,
- "tag": "NEURON"
- }
- ],
- "timestamp_created": "2024-01-12 18:47:12.272426+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/266578",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2182": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 2182,
- "name": "Model of generalized periodic discharges in acute hepatic encephalopathy (Song et al 2019)",
- "repository_type": "github",
- "summary": "\"Acute hepatic encephalopathy (AHE) due to acute liver failure is a common form of delirium, a state of confusion, impaired\r\nattention, and decreased arousal. The electroencephalogram (EEG) in AHE often exhibits a striking abnormal pattern of brain\r\nactivity, which epileptiform discharges repeat in a regular repeating pattern. This pattern is known as generalized periodic\r\ndischarges, or triphasic-waves (TPWs). While much is known about the neurophysiological mechanisms underlying AHE,\r\nhow these mechanisms relate to TPWs is poorly understood. In order to develop hypotheses how TPWs arise, our work builds\r\na computational model of AHE (AHE-CM), based on three modifications of the well-studied Liley model which emulate\r\nmechanisms believed central to brain dysfunction in AHE: increased neuronal excitability, impaired synaptic transmission,\r\nand enhanced postsynaptic inhibition...\"",
- "tags": [
- {
- "id": 2850,
- "tag": "Acute hepatic encephalopathy (AHE)"
- },
- {
- "id": 767,
- "tag": "MATLAB (web link to model)"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2851,
- "tag": "ModelDB:266584"
- },
- {
- "id": 568,
- "tag": "Parameter Fitting"
- },
- {
- "id": 569,
- "tag": "Simplified Models"
- },
- {
- "id": 720,
- "tag": "Temporal Pattern Generation"
- }
- ],
- "timestamp_created": "2024-01-12 18:47:12.785048+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/266584",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2183": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 2183,
- "name": "Single neuron properties shape chaos and signal transmission in random NNs (Muscinelli et al 2019)",
- "repository_type": "github",
- "summary": "\"While most models of randomly connected neural networks assume single-neuron models with simple dynamics, neurons in the brain exhibit complex intrinsic dynamics over multiple timescales. We analyze how the dynamical properties of single neurons and recurrent connections interact to shape the effective dynamics in large randomly connected networks. A novel dynamical mean-field theory for strongly connected networks of multi-dimensional rate neurons shows that the power spectrum of the network activity in the chaotic phase emerges from a nonlinear sharpening of the frequency response function of single neurons. For the case of two-dimensional rate neurons with strong adaptation, we find that the network exhibits a state of \u201cresonant chaos\u201d, characterized by robust, narrow-band stochastic oscillations. The coherence of stochastic oscillations is maximal at the onset of chaos and their correlation time scales with the adaptation timescale of single units. Surprisingly, the resonance frequency can be predicted from the properties of isolated neurons, even in the presence of heterogeneity in the adaptation parameters. In the presence of these internally-generated chaotic fluctuations, the transmission of weak, low-frequency signals is strongly enhanced by adaptation, whereas signal transmission is not influenced by adaptation in the non-chaotic regime. Our theoretical framework can be applied to other mechanisms at the level of single neurons, such as synaptic filtering, refractoriness or spike synchronization. These results advance our understanding of the interaction between the dynamics of single units and recurrent connectivity, which is a fundamental step toward the description of biologically realistic neural networks.\"",
- "tags": [
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 1478,
- "tag": "Information transfer"
- },
- {
- "id": 2664,
- "tag": "Julia (web link to model)"
- },
- {
- "id": 756,
- "tag": "Methods"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2852,
- "tag": "ModelDB:266609"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 569,
- "tag": "Simplified Models"
- },
- {
- "id": 586,
- "tag": "Synchronization"
- }
- ],
- "timestamp_created": "2024-01-12 18:47:13.355303+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/266609",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2184": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 2184,
- "name": "BK Channels Promote Bursting in Pituitary Cells (Tabak et al 2011)",
- "repository_type": "github",
- "summary": "\"The electrical activity pattern of endocrine pituitary cells regulates their basal secretion level. Rat somatotrophs and lactotrophs exhibit spontaneous bursting and have high basal levels of hormone secretion, while gonadotrophs exhibit spontaneous spiking and have low basal hormone secretion. It has been proposed that the difference in electrical activity between bursting somatotrophs and spiking gonadotrophs is due to the presence of large conductance potassium (BK) channels on somatotrophs but not on gonadotrophs. This is one example where the role of an ion channel type may be clearly established. We demonstrate here that BK channels indeed promote bursting activity in pituitary cells. Blocking BK channels in bursting lacto-somatotroph GH4C1 cells changes their firing activity to spiking, while further adding an artificial BK conductance via dynamic clamp restores bursting. Importantly, this burst-promoting effect requires a relatively fast BK activation/deactivation, as predicted by computational models. We also show that adding a fast-activating BK conductance to spiking gonadotrophs converts the activity of these cells to bursting. Together, our results suggest that differences in BK channel expression may underlie the differences in electrical activity and basal hormone secretion levels among pituitary cell types and that the rapid rate of BK channel activation is key to its role in burst promotion.\"",
- "tags": [
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 566,
- "tag": "Bursting"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2853,
- "tag": "ModelDB:266636"
- },
- {
- "id": 743,
- "tag": "NEURON (web link to model)"
- },
- {
- "id": 853,
- "tag": "Python (web link to model)"
- },
- {
- "id": 830,
- "tag": "XPP (web link to model)"
- }
- ],
- "timestamp_created": "2024-01-12 18:47:13.983424+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/266636",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2185": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 2185,
- "name": "Multiscale model of excitotoxicity in PD (Muddapu and Chakravarthy 2020)",
- "repository_type": "github",
- "summary": "Parkinson's disease (PD) is a neurodegenerative disorder caused by loss of dopaminergic neurons in Substantia Nigra pars compacta (SNc). Although the exact cause of cell death is not clear, the hypothesis that metabolic deficiency is a key factor has been gaining attention in recent years. In the present study, we investigate this hypothesis using a multi-scale computational model of the subsystem of the basal ganglia comprising Subthalamic Nucleus (STN), Globus Pallidus externa (GPe) and SNc. The proposed model is a multiscale model in that interactions among the three nuclei are simulated using more abstract Izhikevich neuron models, while the molecular pathways involved in cell death of SNc neurons are simulated in terms of detailed chemical kinetics. Simulation results obtained from the proposed model showed that energy deficiencies occurring at cellular and network levels could precipitate the excitotoxic loss of SNc neurons in PD. At the subcellular level, the models show how calcium elevation leads to apoptosis of SNc neurons. The therapeutic effects of several neuroprotective interventions are also simulated in the model. From neuroprotective studies, it was clear that glutamate inhibition and apoptotic signal blocker therapies were able to halt the progression of SNc cell loss when compared to other therapeutic interventions, which only slows down the progression of SNc cell loss.",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 566,
- "tag": "Bursting"
- },
- {
- "id": 1684,
- "tag": "Ca pump"
- },
- {
- "id": 572,
- "tag": "Calcium dynamics"
- },
- {
- "id": 831,
- "tag": "Deep brain stimulation"
- },
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 730,
- "tag": "I A, slow"
- },
- {
- "id": 2571,
- "tag": "I Ca SOCC"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 817,
- "tag": "I_Na,Ca"
- },
- {
- "id": 818,
- "tag": "I_SERCA"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 767,
- "tag": "MATLAB (web link to model)"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2854,
- "tag": "ModelDB:266637"
- },
- {
- "id": 866,
- "tag": "Multiscale"
- },
- {
- "id": 738,
- "tag": "Na/Ca exchanger"
- },
- {
- "id": 740,
- "tag": "Na/K pump"
- },
- {
- "id": 1744,
- "tag": "Neuromodulation"
- },
- {
- "id": 2599,
- "tag": "Neurotransmitter dynamics"
- },
- {
- "id": 2236,
- "tag": "Pacemaking mechanism"
- },
- {
- "id": 801,
- "tag": "Parkinson's"
- },
- {
- "id": 787,
- "tag": "Pathophysiology"
- },
- {
- "id": 569,
- "tag": "Simplified Models"
- }
- ],
- "timestamp_created": "2024-01-12 18:47:14.564740+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/266637",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2186": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 2186,
- "name": "Apical Length Governs Computational Diversity of Layer 5 Pyramidal Neurons (Galloni et al 2020)",
- "repository_type": "github",
- "summary": "\"Anatomical similarity across the neocortex has led to the common assumption that the circuitry is modular and performs stereotyped computations. Layer 5 pyramidal neurons (L5PNs) in particular are thought to be central to cortical computation because of their extensive arborisation and nonlinear dendritic operations. Here, we demonstrate that computations associated with dendritic Ca2+ plateaus in mouse L5PNs vary substantially between the primary and secondary visual cortices. L5PNs in the secondary visual cortex show reduced dendritic excitability and smaller propensity for burst firing. This reduced excitability is correlated with shorter apical dendrites. Using numerical modelling, we uncover a universal principle underlying the influence of apical length on dendritic backpropagation and excitability, based on a Na+ channel-dependent broadening of backpropagating action potentials. In summary, we provide new insights into the modulation of dendritic excitability by apical dendrite length and show that the operational repertoire of L5PNs is not universal throughout the brain.\"",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 579,
- "tag": "Active Dendrites"
- },
- {
- "id": 566,
- "tag": "Bursting"
- },
- {
- "id": 565,
- "tag": "Dendritic Action Potentials"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 589,
- "tag": "I L high threshold"
- },
- {
- "id": 580,
- "tag": "I M"
- },
- {
- "id": 739,
- "tag": "I Na,p"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 575,
- "tag": "I T low threshold"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2855,
- "tag": "ModelDB:266657"
- },
- {
- "id": 743,
- "tag": "NEURON (web link to model)"
- }
- ],
- "timestamp_created": "2024-01-12 18:47:15.259396+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/266657",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2187": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 2187,
- "name": "Brainstem circuits controlling locomotor frequency and gait (Ausborn et al 2019)",
- "repository_type": "github",
- "summary": "\"A series of recent studies identified key structures in the mesencephalic locomotor region and the caudal brainstem of mice involved in the initiation and control of slow (exploratory) and fast (escape-type) locomotion and gait. However, the interactions of these brainstem centers with each other and with the spinal locomotor circuits are poorly understood. Previously we suggested that commissural and long propriospinal interneurons are the main targets for brainstem inputs adjusting gait (Danner et al., 2017). Here, by extending our previous model, we propose a connectome of the brainstem-spinal circuitry and suggest a mechanistic explanation of the operation of brainstem structures and their roles in controlling speed and gait. We suggest that brainstem control of locomotion is mediated by two pathways, one controlling locomotor speed via connections to rhythm generating circuits in the spinal cord and the other providing gait control by targeting commissural and long propriospinal interneurons.\"",
- "tags": [
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2856,
- "tag": "ModelDB:266663"
- },
- {
- "id": 1779,
- "tag": "Posture and locomotion"
- },
- {
- "id": 853,
- "tag": "Python (web link to model)"
- }
- ],
- "timestamp_created": "2024-01-12 18:47:15.842715+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/266663",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2188": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 2188,
- "name": "Core respiratory network organization: Insights from optogenetics and modeling (Ausborn et al 2018)",
- "repository_type": "github",
- "summary": "\"The circuit organization within the mammalian brainstem respiratory network, specifically within and between the pre-B\u00f6tzinger (pre-B\u00f6tC) and B\u00f6tzinger (B\u00f6tC) complexes, and the roles of these circuits in respiratory pattern generation are continuously debated. We address these issues with a combination of optogenetic experiments and modeling studies. We used transgenic mice expressing channelrhodopsin-2 under the VGAT-promoter to investigate perturbations of respiratory circuit activity by site-specific photostimulation of inhibitory neurons within the pre-B\u00f6tC or B\u00f6tC. The stimulation effects were dependent on the intensity and phase of the photostimulation. Specifically: (1) Low intensity (= 1.0 mW) pulses delivered to the pre-B\u00f6tC during inspiration did not terminate activity, whereas stronger stimulations (= 2.0 mW) terminated inspiration. (2) When the pre-B\u00f6tC stimulation ended in or was applied during expiration, rebound activation of inspiration occurred after a fixed latency. (3) Relatively weak sustained stimulation (20 Hz, 0.5\u20132.0 mW) of pre-B\u00f6tC inhibitory neurons increased respiratory frequency, while a further increase of stimulus intensity (> 3.0 mW) reduced frequency and finally (= 5.0 mW) terminated respiratory oscillations. (4) Single pulses (0.2\u20135.0 s) applied to the B\u00f6tC inhibited rhythmic activity for the duration of the stimulation. (5) Sustained stimulation (20 Hz, 0.5\u20133.0 mW) of the B\u00f6tC reduced respiratory frequency and finally led to apnea. We have revised our computational model of pre-B\u00f6tC and B\u00f6tC microcircuits by incorporating an additional population of post-inspiratory inhibitory neurons in the pre-B\u00f6tC that interacts with other neurons in the network. This model was able to reproduce the above experimental findings as well as previously published results of optogenetic activation of pre-B\u00f6tC or B\u00f6tC neurons obtained by other laboratories. The proposed organization of pre-B\u00f6tC and B\u00f6tC circuits leads to testable predictions about their specific roles in respiratory pattern generation and provides important insights into key circuit interactions operating within brainstem respiratory networks.\"",
- "tags": [
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 1794,
- "tag": "Channelrhodopsin (ChR)"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2857,
- "tag": "ModelDB:266687"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- }
- ],
- "timestamp_created": "2024-01-12 18:47:16.452157+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/266687",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2189": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 2189,
- "name": "Cerebellar stellate cells: changes in threshold, latency and frequency of firing (Mitry et al 2020)",
- "repository_type": "github",
- "summary": "\"Cerebellar stellate cells are inhibitory molecular interneurons that regulate the firing properties of Purkinje cells, the sole output of cerebellar cortex. Recent evidence suggests that\r\nthese cells exhibit temporal increase in excitability during whole-cell patch-clamp configuration in a phenomenon termed runup. They also exhibit a non-monotonic first-spike\r\nlatency profile as a function of the holding potential in response to a fixed step-current.\r\nIn this study, we use modeling approaches to unravel the dynamics of runup and categorize the firing behavior of cerebellar stellate cells as either type I or type II oscillators. We\r\nthen extend this analysis to investigate how the non-monotonic latency profile manifests\r\nitself during runup. We employ a previously developed, but revised, Hodgkin\u2013Huxley type\r\nmodel to show that stellate cells are indeed type I oscillators possessing a saddle node on\r\nan invariant cycle (SNIC) bifurcation. The SNIC in the model acts as a \u201cthreshold\u201d for tonic\r\nfiring and produces a slow region in the phase space called the ghost of the SNIC. The\r\nmodel reveals that (i) the SNIC gets left-shifted during runup with respect to I app = I test\r\nin the current-step protocol, and (ii) both the distance from the stable limit cycle along\r\nwith the slow region produce the non-monotonic latency profile as a function of holding\r\npotential. Using the model, we elucidate how latency can be made arbitrarily large for a\r\nspecific range of holding potentials close to the SNIC during pre-runup (post-runup). We\r\nalso demonstrate that the model can produce transient single spikes in response to step-\r\ncurrents entirely below I SNIC , and that a pair of dynamic inhibitory and excitatory post-\r\nsynaptic inputs can robustly evoke action potentials, provided that the magnitude of the\r\ninhibition is either low or high but not intermediate. Our results show that the topology\r\nof the SNIC is the key to explaining such behaviors.\"",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 804,
- "tag": "Bifurcation"
- },
- {
- "id": 767,
- "tag": "MATLAB (web link to model)"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2858,
- "tag": "ModelDB:266718"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 830,
- "tag": "XPP (web link to model)"
- }
- ],
- "timestamp_created": "2024-01-12 18:47:16.965371+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/266718",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2190": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 2190,
- "name": "Homeostatic mechanisms may shape oscillatory modulations (Peterson & Voytek 2020)",
- "repository_type": "github",
- "summary": "\"Neural oscillations are observed ubiquitously in the mammalian brain, but their stability is known to be rather variable. Some oscillations are tonic and last for seconds or even minutes. Other oscillations appear as unstable bursts. Likewise, some oscillations rely on excitatory AMPAergic synapses, but others are GABAergic and inhibitory. Why this diversity exists is not clear. We hypothesized Ca2+-dependent homeostasis could be important in finding an explanation. We tested this hypothesis in a highly simplified model of hippocampal neurons. In this model homeostasis profoundly alters the modulatory effect of neural oscillations. Under homeostasis, tonic AMPAergic oscillations actually decrease excitability and desynchronize firing. Tonic oscillations that are synaptically GABAergic-like those in real hippocampus-don't provoke a homeostatic response, however. If our simple model is correct, homeostasis can explain why the theta rhythm in the hippocampus is synaptically inhibitory: GABA has little to no intrinsic homeostatic response, and so can preserve the pyramidal cell's natural dynamic range. Based on these results we can also speculate that homeostasis may explain why AMPAergic oscillations in cortex, and hippocampus, often appear as bursts. Bursts do not interact with the slow homeostatic time constant, and so retain their normal excitatory effect.\"",
- "tags": [
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 566,
- "tag": "Bursting"
- },
- {
- "id": 75,
- "tag": "Homeostasis"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2859,
- "tag": "ModelDB:266720"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 853,
- "tag": "Python (web link to model)"
- },
- {
- "id": 569,
- "tag": "Simplified Models"
- }
- ],
- "timestamp_created": "2024-01-12 18:47:17.495411+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/266720",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2191": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 2191,
- "name": "Markovian model for SCN8A-encoded channel (Kuo et al 2020)",
- "repository_type": "github",
- "summary": "Sesamin (SSM) and sesamolin (SesA) are the two major furofuran lignans of sesame oil and they have been previously noticed to exert various biological actions. However, their modulatory actions on different types of ionic currents in electrically excitable cells remain largely unresolved. The present experiments were undertaken to explore the possible perturbations of SSM and SesA on different types of ionic currents, e.g., voltage-gated Na+ currents (INa), erg-mediated K+ currents (IK(erg)), M-type K+ currents (IK(M)), delayed-rectifier K+ currents (IK(DR)) and hyperpolarization-activated cation currents (Ih) identified from pituitary tumor (GH3) cells. The exposure to SSM or SesA depressed the transient and late components of INa with different potencies. The IC50 value of SSM needed to lessen the peak or sustained INa was calculated to be 7.2 or 0.6 \u00b5M, while that of SesA was 9.8 or 2.5 \u00b5M, respectively. The dissociation constant of SSM-perturbed inhibition on INa, based on the first-order reaction scheme, was measured to be 0.93 \u00b5M, a value very similar to the IC50 for its depressant action on sustained INa. The addition of SSM was also effective at suppressing the amplitude of resurgent INa. The addition of SSM could concentration-dependently inhibit the IK(M) amplitude with an IC50 value of 4.8 \u00b5M. SSM at a concentration of 30 \u00b5M could suppress the amplitude of IK(erg), while at 10 \u00b5M, it mildly decreased the IK(DR) amplitude. However, the addition of neither SSM (10 \u00b5M) nor SesA (10 \u00b5M) altered the amplitude or kinetics of Ih in response to long-lasting hyperpolarization. Additionally, in this study, a modified Markovian model designed for SCN8A-encoded (or NaV1.6) channels was implemented to evaluate the plausible modifications of SSM on the gating kinetics of NaV channels. The model demonstrated herein was well suited to predict that the SSM-mediated decrease in peak INa, followed by increased current inactivation, which could largely account for its favorable decrease in the probability of the open-blocked over open state of NaV channels. Collectively, our study provides evidence that highlights the notion that SSM or SesA could block multiple ion currents, such as INa and IK(M), and suggests that these actions are potentially important and may participate in the functional activities of various electrically excitable cells in vivo.",
- "tags": [
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2860,
- "tag": "ModelDB:266726"
- },
- {
- "id": 759,
- "tag": "XPPAUT"
- }
- ],
- "timestamp_created": "2024-01-12 18:47:18.005298+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/266726",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2192": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 2192,
- "name": "A model of closed-loop motor unit including muscle spindle feedback (Kim, 2020)",
- "repository_type": "github",
- "summary": "Persistent inward current generating ion channels are located over spinal motoneurons and actively recruited during normal behaviors. Constructing a realistic computational model of closed-loop motor unit, a motoneuron and muscle fibers that it innervates including muscle spindle afferents, the study reveals functional linkage between persistent inward current location, motoneuron discharge pattern and muscle force output at various muscle lengths. This systematic analysis may provide useful insights into interplay of spinal and muscular mechanisms in control of movements.",
- "tags": [
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 1433,
- "tag": "I_AHP"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2861,
- "tag": "ModelDB:266732"
- },
- {
- "id": 1966,
- "tag": "Motor control"
- },
- {
- "id": 577,
- "tag": "NEURON"
- }
- ],
- "timestamp_created": "2024-01-12 18:47:18.537087+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/266732",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2193": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 2193,
- "name": "E-I-E direction-selective motion discrimination visual cortex traveling waves (Heitmann et al 2020)",
- "repository_type": "github",
- "summary": "The direction-selective responses of neurons in visual cortex cannot be separated into independent spatial and temporal processes. Contemporary theories of how neurons compute non-separable responses typically rely on finely tuned transmission delays. However the existence of such delays is controversial. We propose an alternative neural mechanism for computing non-separable responses that relies on the predisposition of the cortical tissue to spontaneously generate traveling waves of neural activity. We propose that these endogenous waves resonate with the visual stimulus to elicit direction-selective neural responses without resort to time delays.",
- "tags": [
- {
- "id": 2862,
- "tag": "Brain Dynamics Toolbox"
- },
- {
- "id": 860,
- "tag": "Direction Selectivity"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2863,
- "tag": "ModelDB:266770"
- },
- {
- "id": 1700,
- "tag": "Motion Detection"
- },
- {
- "id": 587,
- "tag": "Spatio-temporal Activity Patterns"
- }
- ],
- "timestamp_created": "2024-01-12 18:47:19.097522+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/266770",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2194": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 2194,
- "name": "Sequence learning via biophysically realistic learning rules (Cone and Shouval 2021)",
- "repository_type": "github",
- "summary": "This work proposes a substrate for learned sequential representations, via a network model that can robustly learn and recall discrete sequences of variable order and duration. The model consists of a network of spiking leaky-integrate-and-fire model neurons placed in a modular architecture designed to resemble cortical microcolumns. Learning is performed via a biophysically realistic learning rule based on \u201celigibility traces\u201d, which hold a history of synaptic activity before being converted into changes in synaptic strength upon neuromodulator activation. Before training, the network responds to incoming stimuli, and contains no memory of any particular sequence. After training, presentation of only the first element in that sequence is sufficient for the network to recall an entire learned representation of the sequence. An extended version of the model also demonstrates the ability to successfully learn and recall non-Markovian sequences.",
- "tags": [
- {
- "id": 2864,
- "tag": "Eligibility traces"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2865,
- "tag": "ModelDB:266774"
- },
- {
- "id": 2866,
- "tag": "Sequence learning"
- }
- ],
- "timestamp_created": "2024-01-12 18:47:19.611497+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/266774",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2195": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 2195,
- "name": "Library of biophysically detailed striatal projection neurons (Lindroos and Hellgren Kotaleski 2020)",
- "repository_type": "github",
- "summary": "Library of compartmentalized models used to investigate dendritic integration in striatal projection neurons under neuromodulation.",
- "tags": [
- {
- "id": 579,
- "tag": "Active Dendrites"
- },
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 580,
- "tag": "I M"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2867,
- "tag": "ModelDB:266775"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 1744,
- "tag": "Neuromodulation"
- },
- {
- "id": 620,
- "tag": "Python"
- },
- {
- "id": 2868,
- "tag": "Soma-dendrite cross-talk"
- },
- {
- "id": 725,
- "tag": "Synaptic Plasticity"
- }
- ],
- "timestamp_created": "2024-01-12 18:47:20.159520+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/266775",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2196": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 2196,
- "name": "Modeling a Nociceptive Neuro-Immune Synapse Activated by ATP and 5-HT in Meninges (Suleimanova et al., 2020)",
- "repository_type": "github",
- "summary": "\"Extracellular ATP and serotonin (5-HT) are powerful triggers of nociceptive firing in the meninges, a process supporting headache and whose cellular mechanisms are incompletely understood. The current study aimed to develop, with the neurosimulator NEURON, a novel approach to explore in silico the molecular determinants of the long-lasting, pulsatile nature of migraine attacks. The present model included ATP and 5-HT release, ATP diffusion and hydrolysis, 5-HT uptake, differential activation of ATP P2X or 5-HT3 receptors, and receptor subtype-specific desensitization. The model also tested the role of branched meningeal fibers with multiple release sites. Spike generation and propagation were simulated using variable contribution by potassium and sodium channels in a multi-compartment fiber environment. Multiple factors appeared important to ensure prolonged nociceptive firing potentially relevant to long-lasting pain. Crucial roles were observed in: (i) co-expression of ATP P2X2 and P2X3 receptor subunits; (ii) intrinsic activation/inactivation properties of sodium Nav1.8 channels; and (iii) temporal and spatial distribution of ATP/5-HT release sites along the branches of trigeminal nerve fibers. Based on these factors we could obtain either persistent activation of nociceptive firing or its periodic bursting mimicking the pulsating nature of pain. In summary, our model proposes a novel tool for the exploration of peripheral nociception to test the contribution of clinically relevant factors to headache including migraine pain.\" (paper abstract)",
- "tags": [
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2869,
- "tag": "ModelDB:266782"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 775,
- "tag": "Nociception"
- },
- {
- "id": 620,
- "tag": "Python"
- }
- ],
- "timestamp_created": "2024-01-12 18:47:20.716764+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/266782",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2197": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 2197,
- "name": "Syn Plasticity Regulation + Information Processing in Neuron-Astrocyte Networks (Vuillaume et al 21)",
- "repository_type": "github",
- "summary": "\"... we consider a model of astrocyte-regulated synapses to investigate this hypothesis at the level of layered networks of interacting neurons and astrocytes. Our simulations hint that gliotransmission sustains the transfer function across layers, although it decorrelates the neuronal activity from the signal pattern...\"",
- "tags": [
- {
- "id": 2255,
- "tag": "Brian 2"
- },
- {
- "id": 572,
- "tag": "Calcium dynamics"
- },
- {
- "id": 2330,
- "tag": "Dynamic extracellular concentrations"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2870,
- "tag": "ModelDB:266794"
- }
- ],
- "timestamp_created": "2024-01-12 18:47:21.247994+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/266794",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2198": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 2198,
- "name": "Healthy and Epileptic Hippocampal Circuit (Aussel et al 2022)",
- "repository_type": "github",
- "summary": "This model aims at reproducing healthy and epileptic hippocampal oscillations, and includes modeling of the sleep-wake cycle. It was used to study theta-nested gamma oscillations, sharp-wave ripple complexes,",
- "tags": [
- {
- "id": 2255,
- "tag": "Brian 2"
- },
- {
- "id": 469,
- "tag": "Epilepsy"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2871,
- "tag": "ModelDB:266796"
- },
- {
- "id": 2809,
- "tag": "Sleep-Wake transition"
- }
- ],
- "timestamp_created": "2024-01-12 18:47:21.762407+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/266796",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2199": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 2199,
- "name": "Ventral medial entorhinal cortical stellate neuron model: the role of T-type Ca2+ and persistent Na+ (Topczewska et al., accepted)",
- "repository_type": "github",
- "summary": "Dorsal and ventral medial entorhinal cortex (mEC) regions have distinct neural network\r\nfiring patterns to differentially support functions such as spatial memory. Correspondingly,\r\nmEC layer II stellate neuron action potential frequencies vary across the dorsal-ventral axis,\r\nwith dorsal neurons exhibiting lower firing rates than ventral neurons. This has been partly\r\nattributed to higher densities of inhibitory conductances in dorsal compared to ventral\r\nneurons. We asked whether additional conductances might also impact this dorsal-ventral\r\ngradient in spike firing. We report that T-type Ca 2+ current amplitudes increased three-fold\r\nalong the dorsal-ventral axis in mEC layer II stellate neurons. Twice as much Ca V 3.2 mRNA\r\nwas also detected in ventral mEC compared with dorsal mEC. Unusually, as T-type Ca 2+\r\ncurrents are only transiently active, long depolarizing stimuli applied to ventral, and not\r\ndorsal, stellate neurons triggered these currents to cause a sustained rise in membrane voltage\r\nand spike firing. This effect was due to T-type Ca 2+ currents acting in concert with persistent\r\nNa + currents. T-type Ca 2+ currents themselves prolonged excitatory post-synaptic potentials\r\n(EPSPs) to enhance the summation of EPSP trains and augment EPSP-spike coupling in\r\nventral neurons. In contrast, T-type Ca 2+ currents had no effect on dorsal EPSP spike-\r\ncoupling. These findings indicate that by preferentially regulating ventral neuron spike firing\r\nand synaptic potential integration, T-type Ca 2+ currents critically influence the dorsal-ventral\r\ngradient in mEC stellate neuron excitability and associated circuit activity.",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 739,
- "tag": "I Na,p"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2872,
- "tag": "ModelDB:266797"
- },
- {
- "id": 577,
- "tag": "NEURON"
- }
- ],
- "timestamp_created": "2024-01-12 18:47:22.557344+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/266797",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2200": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 2200,
- "name": "Human tactile FA1 neurons (Hay and Pruszynski 2020)",
- "repository_type": "github",
- "summary": "\"... we show that synaptic integration across the complex signals from the first-order neuronal population could underlie human ability to accurately (< 3\u00b0) and rapidly process the orientation of edges moving across the fingertip. We first derive spiking models of human first-order tactile neurons that fit and predict responses to moving edges with high accuracy. We then use the model neurons in simulating the peripheral neuronal population that innervates a fingertip. We train classifiers performing synaptic integration across the neuronal population activity, and show that synaptic integration across first-order neurons can process edge orientations with high acuity and speed. ... our models suggest that integration of fast-decaying (AMPA-like) synaptic inputs within short timescales is critical for discriminating fine orientations, whereas integration of slow-decaying (NMDA-like) synaptic inputs supports discrimination of coarser orientations and maintains robustness over longer timescales\"",
- "tags": [
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2873,
- "tag": "ModelDB:266798"
- },
- {
- "id": 2339,
- "tag": "Receptive field"
- },
- {
- "id": 821,
- "tag": "Sensory coding"
- },
- {
- "id": 596,
- "tag": "Synaptic Integration"
- }
- ],
- "timestamp_created": "2024-01-12 18:47:23.063900+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/266798",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2201": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 2201,
- "name": "Purkinje neuron network (Zang et al. 2020)",
- "repository_type": "github",
- "summary": "Both spike rate and timing can transmit information in the brain. Phase response curves (PRCs) quantify how a neuron transforms input to output by spike timing. PRCs exhibit strong firing-rate adaptation, but its mechanism and relevance for network output are poorly understood. Using our Purkinje cell (PC) model we demonstrate that the rate adaptation is caused by rate-dependent subthreshold membrane potentials efficiently regulating the activation of Na+ channels. Then we use a realistic PC network model to examine how rate-dependent responses synchronize spikes in the scenario of reciprocal inhibition-caused high-frequency oscillations. The changes in PRC cause oscillations and spike correlations only at high firing rates. The causal role of the PRC is confirmed using a simpler coupled oscillator network model. This mechanism enables transient oscillations between fast-spiking neurons that thereby form PC assemblies. Our work demonstrates that rate adaptation of PRCs can spatio-temporally organize the PC input to cerebellar nuclei.",
- "tags": [
- {
- "id": 727,
- "tag": "Action Potential Initiation"
- },
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2874,
- "tag": "ModelDB:266799"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 823,
- "tag": "Phase Response Curves"
- },
- {
- "id": 587,
- "tag": "Spatio-temporal Activity Patterns"
- },
- {
- "id": 586,
- "tag": "Synchronization"
- }
- ],
- "timestamp_created": "2024-01-12 18:47:23.597809+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/266799",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2202": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 2202,
- "name": "Self-organization of cortical areas in development and evolution of neocortex (Imam & Finlay 2021)",
- "repository_type": "github",
- "summary": "\"Using physical parameters representing primary and secondary visual areas as they vary from monkey to mouse, we derived a network growth model to explore if characteristic features of secondary areas could be produced from correlated activity patterns arising from V1 alone.\"",
- "tags": [
- {
- "id": 793,
- "tag": "Development"
- },
- {
- "id": 2875,
- "tag": "Evolution"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2876,
- "tag": "ModelDB:266800"
- },
- {
- "id": 620,
- "tag": "Python"
- }
- ],
- "timestamp_created": "2024-01-12 18:47:24.244551+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/266800",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2203": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 2203,
- "name": "NMDA receptors enhance the fidelity of synaptic integration (Li and Gulledge 2021)",
- "repository_type": "github",
- "summary": "Excitatory synaptic transmission in many neurons is mediated by two co-expressed ionotropic glutamate receptor subtypes, AMPA and NMDA receptors, that differ in their kinetics, ion-selectivity, and voltage-sensitivity. AMPA receptors have fast kinetics and are voltage-insensitive, while NMDA receptors have slower kinetics and increased conductance at depolarized membrane potentials. Here we report that the voltage-dependency and kinetics of NMDA receptors act synergistically to stabilize synaptic integration of excitatory postsynaptic potentials (EPSPs) across spatial and voltage domains. Simulations of synaptic integration in simplified and morphologically realistic dendritic trees revealed that the combined presence of AMPA and NMDA conductances reduces the variability of somatic responses to spatiotemporal patterns of excitatory synaptic input presented at different initial membrane potentials and/or in different dendritic domains. This moderating effect of the NMDA conductance on synaptic integration was robust across a wide range of AMPA-to-NMDA ratios, and results from synergistic interaction of NMDA kinetics (which reduces variability across membrane potential) and voltage-dependence (which favors stabilization across dendritic location). When combined with AMPA conductance, the NMDA conductance balances voltage- and impedance-dependent changes in synaptic driving force, and distance-dependent attenuation of synaptic potentials arriving at the axon, to increase the fidelity of synaptic integration and EPSP-spike coupling across neuron state (i.e., initial membrane potential) and dendritic location of synaptic input. Thus, synaptic NMDA receptors convey advantages for synaptic integration that are independent of, but fully compatible with, their importance for coincidence detection and synaptic plasticity.",
- "tags": [
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2877,
- "tag": "ModelDB:266802"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 596,
- "tag": "Synaptic Integration"
- }
- ],
- "timestamp_created": "2024-01-12 18:47:24.760834+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/266802",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2204": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 2204,
- "name": "Cerebellar Golgi cells, dendritic processing, and synaptic plasticity (Masoli et al 2020)",
- "repository_type": "github",
- "summary": "The Golgi cells are the main inhibitory interneurons of the cerebellar granular layer. To study the mechanisms through which these neurons integrate complex input patterns, a new set of models were developed using the latest experimental information and a genetic algorithm approach to fit the maximum ionic channel conductances. The models faithfully reproduced a rich pattern of electrophysiological and pharmacological properties and predicted the operating mechanisms of these neurons.",
- "tags": [
- {
- "id": 727,
- "tag": "Action Potential Initiation"
- },
- {
- "id": 572,
- "tag": "Calcium dynamics"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2878,
- "tag": "ModelDB:266806"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 2599,
- "tag": "Neurotransmitter dynamics"
- }
- ],
- "timestamp_created": "2024-01-12 18:47:25.366412+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/266806",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2205": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 2205,
- "name": "Striatum D1 Striosome and Matrix Upstates (Prager et al., 2020)",
- "repository_type": "github",
- "summary": "\"...We show that dopamine oppositely shapes responses to convergent excitatory inputs in mouse striosome and matrix striatal spiny projection neurons (SPNs). Activation of postsynaptic D1 dopamine receptors promoted the generation of long-lasting synaptically evoked 'up-states' in matrix SPNs but opposed it in striosomes, which were more excitable under basal conditions. Differences in dopaminergic modulation were mediated, in part, by dendritic voltage-gated calcium channels (VGCCs): pharmacological manipulation of L-type VGCCs reversed compartment-specific responses to D1 receptor activation...\"",
- "tags": [
- {
- "id": 579,
- "tag": "Active Dendrites"
- },
- {
- "id": 572,
- "tag": "Calcium dynamics"
- },
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 730,
- "tag": "I A, slow"
- },
- {
- "id": 1560,
- "tag": "I Ca,p"
- },
- {
- "id": 780,
- "tag": "I Cl,Ca"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 842,
- "tag": "I Krp"
- },
- {
- "id": 2162,
- "tag": "I Na, slow inactivation"
- },
- {
- "id": 575,
- "tag": "I T low threshold"
- },
- {
- "id": 1931,
- "tag": "Kir"
- },
- {
- "id": 1838,
- "tag": "MOOSE/PyMOOSE"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2879,
- "tag": "ModelDB:266807"
- }
- ],
- "timestamp_created": "2024-01-12 18:47:25.904871+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/266807",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2206": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 2206,
- "name": "Cl- homeostasis in immature hippocampal CA3 neurons (Kolbaev et al 2020)",
- "repository_type": "github",
- "summary": "Model used for the revision of the manuscript.\r\nInsertion of a passive Cl- flux and an active Cl-accumulation. Parameters adapted to match the properties of [Cl-]i determined in immature rat CA3 neurons in-vitro.",
- "tags": [
- {
- "id": 75,
- "tag": "Homeostasis"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2880,
- "tag": "ModelDB:266811"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 1687,
- "tag": "NKCC1"
- },
- {
- "id": 725,
- "tag": "Synaptic Plasticity"
- }
- ],
- "timestamp_created": "2024-01-12 18:47:26.466300+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/266811",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "summary": "\"... we used compartmental biophysical models of Cl- dynamics simulating either a simple ball-and-stick topology or a reconstructed CA3 neuron. These computational experiments demonstrated that glutamatergic co-stimulation enhances GABA receptor-mediated Cl- influx at low and attenuates or reverses the Cl- efflux at high initial [Cl-]i. The size of glutamatergic influence on GABAergic Cl--fluxes depends on the conductance, decay kinetics, and localization of glutamatergic inputs. Surprisingly, the glutamatergic shift in GABAergic Cl--fluxes is invariant to latencies between GABAergic and glutamatergic inputs over a substantial interval...\"",
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- "tag": "Chloride regulation"
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- "timestamp_created": "2024-01-12 18:47:28.591554+00:00",
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- "name": "A general model of hippocampal and dorsal striatal learning and decision making (Geerts et al 2020)",
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- "summary": "Python and Cython implementation of a dual-systems reinforcement learning model that solves navigation and decision tasks using model-free and successor representation strategies. For questions, please contact jesse.geerts.14@ucl.ac.uk.",
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- "timestamp_created": "2024-01-12 18:47:29.135996+00:00",
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- "name": "Neuroprotective Role of Gap Junctions in a Neuron Astrocyte Network Model (Huguet et al 2016)",
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- "summary": "\"A detailed biophysical model for a neuron/astrocyte network is developed to explore mechanisms responsible for the initiation and propagation of cortical spreading depolarizations and the role of astrocytes in maintaining ion homeostasis, thereby preventing these pathological waves... properties of spreading depolarizations, such as wave speed and duration of depolarization, depend on several factors, including the neuron and astrocyte Na+-K+ ATPase pump strengths. In particular, we consider the neuroprotective role of astrocyte gap junction coupling. The model demonstrates that a syncytium of electrically coupled astrocytes can maintain a physiological membrane potential in the presence of an elevated extracellular K+ concentration and efficiently distribute the excess K+ across the syncytium.\"",
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- "tag": "C or Cplusplus program"
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- "name": "Synaptic vesicle fusion model (Church et al 2021)",
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- "summary": "These parameter files define Cell simulations of glutamate release and receptor binding at synapses. Four basic models are included that vary, the pore diameter of a fusing vesicle from full fusion (FullFusion) to a variable sized pore from a small as 0.4nm (DelayFusion), that vary the umber of fusing vesicles (Multivesicular) or that vary the position of the fusing vesicle with the post synaptic glutamate receptors (Clustered receptors). Our work demonstrates that experimental effects on release and low affinity antagonism are well-fit by reduced release rates of glutamate from a restricted pore.",
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- "id": 826,
- "tag": "MCell"
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- "timestamp_created": "2024-01-12 18:47:30.183153+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/266839",
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- "id": 2214,
- "name": "Phasic ACh promotes gamma oscillations in E-I networks (Lu et al, 2020)",
- "repository_type": "github",
- "summary": "In a biophysically-based model, we show that a network of excitatory (E) and inhibitory (I) neurons that initially displays asynchronous firing can generate transient gamma oscillatory activity in response to simulated brief pulses of ACh. ACh effects are simulated as transient modulation of the conductance of an M-type K+ current which is blocked by activation of muscarinic receptors and has significant effects on neuronal excitability. The ACh-induced effects on the M current conductance, gks, change network dynamics to promote the emergence of network gamma rhythmicity through a Pyramidal-Interneuronal Network Gamma (PING) mechanism.",
- "tags": [
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- "id": 1799,
- "tag": "Gamma oscillations"
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- "id": 580,
- "tag": "I M"
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- "id": 584,
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- "id": 2888,
- "tag": "ModelDB:266840"
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- "id": 585,
- "tag": "Oscillations"
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- "timestamp_created": "2024-01-12 18:47:30.870138+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/266840",
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- "summary": "An implementation of coupling between BK_Ca channels and CaV channels suitable for use in whole cell models.",
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- "id": 572,
- "tag": "Calcium dynamics"
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- "id": 583,
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- "id": 2318,
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- "timestamp_created": "2024-01-12 18:47:31.468836+00:00",
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- "id": 2216,
- "name": "A cerebellar model of phase-locked tACS for essential tremor (Schreglmann et al., 2021)",
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- "summary": "This model is a supplementary material for Schreglmann, Sebastian R., et al. \"Non-invasive suppression of essential tremor via phase-locked disruption of its temporal coherence\" Nature Communications (2021). The model demonstrates that phase-locked transcranial alternating current stimulation (tACS) is able to disrupt the tremor-related oscillations in the cerebellum, and its efficacy is highly dependent on the relative phase between the stimulation and tremor.",
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- "id": 564,
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- "timestamp_created": "2024-01-12 18:47:31.994740+00:00",
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- "name": "Neuronal computation evoked by extra-large spines (Obi-Nagata et al., 2023)",
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- "summary": "Human genetics strongly support the involvement of synaptopathy in psychiatric disorders. However, trans-scale causality linking synapse pathology to behavioral changes is lacking. To address this question, we examined the effects of synaptic inputs on dendrites, cells, and behaviors of mice with knockdown of SETD1A and DISC1, which are validated animal models of schizophrenia. Both models exhibited an overrepresentation of extra-large (XL) synapses, which evoked supralinear dendritic and somatic integration, resulting in increased neuronal firing. The probability of XL spines correlated negatively with working memory, and the optical prevention of XL spine generation restored working memory impairment. Furthermore, XL synapses were significantly more abundant in the postmortem brains of schizophrenia patients than in those of matched controls. Our findings suggest that working memory performance, a pivotal aspect of psychiatric symptoms, is shaped by distorted dendritic and somatic integration via extra-large spines.",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 583,
- "tag": "I Calcium"
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- "id": 576,
- "tag": "I K"
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- "id": 581,
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- "id": 574,
- "tag": "I Na,t"
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- "id": 564,
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- "id": 2891,
- "tag": "ModelDB:266844"
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- "id": 577,
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- "id": 596,
- "tag": "Synaptic Integration"
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- ],
- "timestamp_created": "2024-01-12 18:47:32.520862+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/266844",
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- "last_name": "Admin",
- "username": "osbadmin"
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- "name": "Age-dependent excitability of CA1 pyramidal neurons in APPPS1 Alzheimer's model (Vitale et al 2021)",
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- "summary": "Age-dependent accumulation of amyloid-b, provoking increasing brain amyloidopathy, triggers abnormal patterns of neuron activity and circuit synchronization in Alzheimer\u2019s disease (AD) as observed in human AD patients and AD mouse models. Recent studies on AD mouse models, mimicking this age-dependent amyloidopathy, identified alterations in CA1 neuron excitability. However, these models generally also overexpress mutated amyloid precursor protein (APP) and presenilin 1 (PS1) and there is a lack of a clear correlation of neuronal excitability alterations with progressive amyloidopathy. The active development of computational models of AD points out the need of collecting such experimental data to build a reliable disease model exhibiting AD-like disease progression. We therefore used the feature extraction tool of the Human Brain Project (HBP) Brain Simulation Platform to systematically analyze the excitability profile of CA1 pyramidal neuron in the APPPS1 mouse model. We identified specific features of neuron excitability that best correlate either with over-expression of mutated APP and PS1 or increasing Ab amyloidopathy. Notably, we report strong alterations in membrane time constant and action potential width and weak alterations in firing behavior. Also, using a CA1 pyramidal neuron model, we evidence amyloidopathy-dependent alterations in Ih. Finally, cluster analysis of these recordings showed that we could reliably assign a trace to its correct group, opening the door to a more refined, less variable analysis of AD-affected neurons. This inter-disciplinary analysis, bringing together experimentalists and modelers, helps to further unravel the neuronal mechanisms most affected by AD and to build a biologically plausible computational model of the AD brain.\r\n\r\n\r\nReference: Paola Vitale, Ana Rita Salgueiro-Pereira, Carmen Alina Lupascu, Rosanna Migliore, Michele Migliore, H\u00e9l\u00e8ne Marie. \"Analysis of age-dependent alterations in excitability properties of CA1 pyramidal neurons in an APPPS1 model of Alzheimer's disease\". Frontiers in Aging Neuroscience (2021) DOI: 10.3389/fnagi.2021.668948",
- "tags": [
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- "id": 827,
- "tag": "Aging/Alzheimer`s"
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- "id": 571,
- "tag": "Detailed Neuronal Models"
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- "id": 594,
- "tag": "I h"
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- "id": 564,
- "tag": "ModelDB"
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- "id": 2892,
- "tag": "ModelDB:266848"
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- "id": 2461,
- "tag": "eFEL"
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- "timestamp_created": "2024-01-12 18:47:33.110862+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/266848",
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- "default_context": "main",
- "id": 2219,
- "name": "Single Trial Sequence learning: a spiking neurons model based on hippocampus (Coppolino et al 2021)",
- "repository_type": "github",
- "summary": "In contrast with our everyday experience using brain circuits, it can take a prohibitively long time to train a computational system to produce the correct sequence of outputs in the presence of a series of inputs. This suggests that something important is missing in the way in which models are trying to reproduce basic cognitive functions. \r\nIn this work, we introduce a new neuronal network architecture that is able to learn, in a single trial, an arbitrary long sequence of any known objects. The key point of the model is the explicit use of mechanisms and circuitry observed in the hippocampus. By directly following the natural system\u2019s layout and circuitry, this type of implementation has the additional advantage that the results can be more easily compared to experimental data, allowing a deeper and more direct understanding of the mechanisms underlying cognitive functions and dysfunctions.",
- "tags": [
- {
- "id": 860,
- "tag": "Direction Selectivity"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2893,
- "tag": "ModelDB:266849"
- },
- {
- "id": 2058,
- "tag": "Persistent activity"
- },
- {
- "id": 799,
- "tag": "Place cell/field"
- },
- {
- "id": 714,
- "tag": "PyNN"
- },
- {
- "id": 620,
- "tag": "Python"
- }
- ],
- "timestamp_created": "2024-01-12 18:47:33.650783+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/266849",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "auto_sync": true,
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- "modeling"
- ],
- "default_context": "master",
- "id": 2220,
- "name": "A model for a nociceptor terminal and terminal tree (Barkai et al., 2020)",
- "repository_type": "github",
- "summary": "This model was used to study how the architecture of the nociceptor terminal tree affects the input-output relation of the primary nociceptive neurons. The model shows that the input-output properties of the nociceptive neurons depend on the length, the axial resistance, and location of individual terminals and that activation of multiple terminals by a capsaicin-like current allows summation of the responses from individual terminals, thus leading to increased nociceptive output.",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 728,
- "tag": "Axonal Action Potentials"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 564,
- "tag": "ModelDB"
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- {
- "id": 2894,
- "tag": "ModelDB:266850"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 775,
- "tag": "Nociception"
- }
- ],
- "timestamp_created": "2024-01-12 18:47:34.259551+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/266850",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2221": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 2221,
- "name": "Dendritic Impedance in Neocortical L5 PT neurons (Kelley et al. 2021)",
- "repository_type": "github",
- "summary": "We simulated chirp current stimulation in the apical dendrites of 5 biophysically-detailed multi-compartment models of neocortical pyramidal tract neurons and found that a combination of HCN channels and TASK-like channels produced the best fit to experimental measurements of dendritic impedance. We then explored how HCN and TASK-like channels can shape the dendritic impedance as well as the voltage response to synaptic currents.",
- "tags": [
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 2895,
- "tag": "Impedance"
- },
- {
- "id": 564,
- "tag": "ModelDB"
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- {
- "id": 2896,
- "tag": "ModelDB:266851"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 659,
- "tag": "NetPyNE"
- },
- {
- "id": 620,
- "tag": "Python"
- },
- {
- "id": 2715,
- "tag": "TASK channel"
- }
- ],
- "timestamp_created": "2024-01-12 18:47:34.781619+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/266851",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2222": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 2222,
- "name": "PLS-framework (Tikidji-Hamburyan and Colonnese 2021)",
- "repository_type": "github",
- "summary": "\"Numerical simulations become incredibly challenging when an extensive network with a detailed representation of each neuron needs to be modeled over a long time interval to study slow evolving processes, e.g. development of the thalamocortical circuits. Here we suggest a simple, powerful and flexible approach in which we approximate the right-hand sides of differential equations by combinations of functions from three families: Polynomial, piecewise-Linear, Step (PLS). To obtain a single coherent framework, we provide four core principles in which PLS functions should be combined. We show the rationale behind each of the core principles. Two examples illustrate how to build a conductance-based or phenomenological model using the PLS-framework. We use the first example as a benchmark on three different computational platforms: CPU, GPU, and mobile system-on-chip devices.\"",
- "tags": [
- {
- "id": 2255,
- "tag": "Brian 2"
- },
- {
- "id": 1697,
- "tag": "Cython"
- },
- {
- "id": 756,
- "tag": "Methods"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2897,
- "tag": "ModelDB:266863"
- },
- {
- "id": 620,
- "tag": "Python"
- }
- ],
- "timestamp_created": "2024-01-12 18:47:35.306995+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/266863",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2223": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 2223,
- "name": "Multiplexed coding in Purkinje neuron dendrites (Zang and De Schutter 2021)",
- "repository_type": "github",
- "summary": "Neuronal firing patterns are crucial to underpin circuit level behaviors. In cerebellar Purkinje cells (PCs), both spike rates and pauses are used for behavioral coding, but the cellular mechanisms causing code transitions remain unknown. We use a well-validated PC model to explore the coding strategy that individual PCs use to process parallel fiber (PF) inputs. We find increasing input intensity shifts PCs from linear rate-coders to burst-pause timing-coders by triggering localized dendritic spikes. We validate dendritic spike properties with experimental data, elucidate spiking mechanisms, and predict spiking thresholds with and without inhibition. Both linear and burst-pause computations use individual branches as computational units, which challenges the traditional view of PCs as linear point neurons. Dendritic spike thresholds can be regulated by voltage state, compartmentalized channel modulation, between-branch interaction and synaptic inhibition to expand the dynamic range of linear computation or burst-pause computation. In addition, co-activated PF inputs between branches can modify somatic maximum spike rates and pause durations to make them carry analogue signals. Our results provide new insights into the strategies used by individual neurons to expand their capacity of information processing. ",
- "tags": [
- {
- "id": 565,
- "tag": "Dendritic Action Potentials"
- },
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 739,
- "tag": "I Na,p"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 575,
- "tag": "I T low threshold"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 742,
- "tag": "I p,q"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2898,
- "tag": "ModelDB:266864"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 1919,
- "tag": "Reaction-diffusion"
- },
- {
- "id": 596,
- "tag": "Synaptic Integration"
- },
- {
- "id": 2475,
- "tag": "Temporal Coding"
- }
- ],
- "timestamp_created": "2024-01-12 18:47:35.879485+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/266864",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2224": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 2224,
- "name": "Mathematical model of behavioral time scale plasticity (BTSP) of place fields (Shouval & Cone 2021)",
- "repository_type": "github",
- "summary": "Inspired by experiments showing the generation of place fields in hippocampal CA1 neurons, this model describes CA3 to CA1 synaptic plasticity occurring on behavioral time-scales (order of seconds). Presynaptic activity induces LTP and LTD eligibility traces which are converted into synaptic changes upon the occurrence of an instructive signal, corresponding to the plateau potential in experiments.",
- "tags": [
- {
- "id": 2864,
- "tag": "Eligibility traces"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2899,
- "tag": "ModelDB:266868"
- },
- {
- "id": 799,
- "tag": "Place cell/field"
- },
- {
- "id": 725,
- "tag": "Synaptic Plasticity"
- }
- ],
- "timestamp_created": "2024-01-12 18:47:36.516493+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/266868",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2225": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 2225,
- "name": "Sound-evoked activity in peripheral axons of type I spiral ganglion neurons (Budak et al. 2021)",
- "repository_type": "github",
- "summary": "Using this model, we investigated the implications of two mechanisms underlying the auditory neuropathy known as hidden hearing loss, namely synaptopathy and myelinopathy, on sound-evoked spike generation and timing in the peripheral axons of type I spiral ganglion neurons (SGNs). The model is a reduced biophysical model consisting of a population of myelinated SGN axonal fibers whose firing activity is driven by a previously developed, well accepted model for cochlear sound processing. Using the model, we investigated how synapse loss (synaptopathy) or disruption of myelin organization (myelinopathy) affected spike generation on the axons and the profile of the compound action potential (CAP) signal computed from the spike activity. Synaptopathy and myelinopathy were implemented by removing synapses and by varying the position of SGN heminodes (the nodal structures closest to the inner hair cell synapse where action potentials are generated), respectively. Model results showed that heminode disruption caused decreased amplitude and increased latency of sound-evoked CAPs. In addition, significant elongation of the initial axon segment caused spike generation failure leading to decreased spiking probability. In contrast, synaptopathy, solely decreased probability of firing, subsequently decreasing CAP peak amplitude without affecting its latency, similar to observations in noise exposed animals. Model results reveal the disruptive effect of synaptopathy or myelinopathy on neural activity in the peripheral auditory system that may contribute to perceptual deficits.",
- "tags": [
- {
- "id": 728,
- "tag": "Axonal Action Potentials"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2900,
- "tag": "ModelDB:266871"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 620,
- "tag": "Python"
- }
- ],
- "timestamp_created": "2024-01-12 18:47:37.065619+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/266871",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2226": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 2226,
- "name": "Potjans-Diesmann cortical microcircuit model in NetPyNE (Romaro et al 2021)",
- "repository_type": "github",
- "summary": "The Potjans-Diesmann cortical microcircuit model is a widely used model originally implemented in NEST. Here, we re-implemented the model using NetPyNE, a high-level Python interface to the NEURON simulator, and reproduced the findings of the original publication. We also implemented a method for rescaling the network size which preserves first and second order statistics, building on existing work on network theory. The new implementation enables using more detailed neuron models with multicompartment morphologies and multiple biophysically realistic channels. This opens the model to new research, including the study of dendritic processing, the influence of individual channel parameters, and generally multiscale interactions in the network. The rescaling method provides flexibility to increase or decrease the network size if required when running these more realistic simulations. Finally, NetPyNE facilitates modifying or extending the model using its declarative language; optimizing model parameters; running efficient large-scale parallelized simulations; and analyzing the model through built-in methods, including local field potential calculation and information flow measures.",
- "tags": [
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2901,
- "tag": "ModelDB:266872"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 659,
- "tag": "NetPyNE"
- },
- {
- "id": 620,
- "tag": "Python"
- },
- {
- "id": 569,
- "tag": "Simplified Models"
- }
- ],
- "timestamp_created": "2024-01-12 18:47:37.589931+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/266872",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2227": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 2227,
- "name": "Paranoia and belief updating during a crisis (Suthaharan et al., 2021)",
- "repository_type": "github",
- "summary": "Perceptual model with three hierarchical layers defined by probability distributions: (1) reward belief, (2) contingency beliefs, (3) volatility beliefs used to investigate the relationship between real-world uncertainty, paranoia, and laboratory task behavior.",
- "tags": [
- {
- "id": 2456,
- "tag": "COVID-19"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2902,
- "tag": "ModelDB:266880"
- },
- {
- "id": 2696,
- "tag": "Paranoia"
- },
- {
- "id": 1754,
- "tag": "R"
- }
- ],
- "timestamp_created": "2024-01-12 18:47:38.116697+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/266880",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2228": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 2228,
- "name": "A neurite to measure ePSP and AP amplitude after passive spread (DeMaegd & Stein, 2021)",
- "repository_type": "github",
- "summary": "Increasing temperatures overwhelmingly shunts dendritic electrical spread in a crustacean motor neuron (LG) leading to the disruption of a vital pattern generator. LG recieves synaptic input from a descending projection neuron (MCN1) via a chemical and electrical synapse. Warmer temperatures increase leak conductances in the neurite and increase the synaptic input. Here, we modelled the conflicting influence of temperature at the MCN1-LG synapse and LG neurite to determine the resulting ePSP and AP amplitude measured at different distanced from the synaptic input after passive progation through the neurite.",
- "tags": [
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2903,
- "tag": "ModelDB:266881"
- },
- {
- "id": 577,
- "tag": "NEURON"
- }
- ],
- "timestamp_created": "2024-01-12 18:47:38.619792+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/266881",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2229": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 2229,
- "name": "An agent-based computational model for cortical layer formation (Bauer et al 2021)",
- "repository_type": "github",
- "summary": "This computational model can account for layer-specific neuron numbers in various different cortical structures. It is agent-based and is initiated from a small homogeneous pool of precursor cells. The file Lamination.java includes the main function that induces the activation of multiple \"modules\" within a gene regulatory network.",
- "tags": [
- {
- "id": 2904,
- "tag": "Cx3Dp"
- },
- {
- "id": 793,
- "tag": "Development"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2905,
- "tag": "ModelDB:266895"
- }
- ],
- "timestamp_created": "2024-01-12 18:47:39.146299+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/266895",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2230": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 2230,
- "name": "Membrane electrical properties of mouse CA1 pyramidal cells during strong inputs (Bianchi et al 22)",
- "repository_type": "github",
- "summary": "ABSTRACT: In this work we highlight an electrophysiological feature, often observed in recordings from mouse CA1 pyramidal cells, which has been so far ignored by experimentalists and modelers. It consists of a large and dynamic increase in the depolarization baseline (i.e. the minimum value of the membrane potential between successive action potentials during a sustained input) in response to strong somatic current injections. Such an increase can directly affect neurotransmitter release properties and, more generally, efficacy of synaptic transmission. However, it cannot be explained by any currently available conductance-based computational model. Here we present a model addressing this issue, demonstrating that experimental recordings can be reproduced by assuming that an input current modifies, in a time-dependent manner, the electrical and permeability properties of the neuron membrane by shifting the ionic reversal potentials and channel kinetics. For this reason, we propose that any detailed model of ion channel kinetics, for neurons exhibiting this characteristic, should be adapted to correctly represent the response and the synaptic integration process during strong and sustained inputs. ",
- "tags": [
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 731,
- "tag": "I CAN"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 580,
- "tag": "I M"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 2122,
- "tag": "Membrane Properties"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2906,
- "tag": "ModelDB:266900"
- },
- {
- "id": 577,
- "tag": "NEURON"
- }
- ],
- "timestamp_created": "2024-01-12 18:47:39.686258+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/266900",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2231": {
- "auto_sync": true,
- "content_types": "modeling",
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- "modeling"
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- "default_context": "master",
- "id": 2231,
- "name": "Reduced-morphology model of CA1 pyramidal cells optimized + validated w/ HippoUnit (Tomko et al '21)",
- "repository_type": "github",
- "summary": "Here we employ the HippoUnit tests to optimize and validate our new compartmental model with reduced morphology. We show that our model is able to account for the following six well-established characteristic anatomical and physiological properties of CA1 pyramidal cells: (1) The reduced dendritic morphology contains all major dendritic branch classes. In addition to anatomy, the model reproduces also 5 key physiological features, including (2) somatic electrophysiological responses, (3) depolarization block, (4) EPSP attenuation (5) action potential (AP) backpropagation, and (6) synaptic integration at oblique dendrites.",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 579,
- "tag": "Active Dendrites"
- },
- {
- "id": 1684,
- "tag": "Ca pump"
- },
- {
- "id": 565,
- "tag": "Dendritic Action Potentials"
- },
- {
- "id": 873,
- "tag": "Depolarization block"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 731,
- "tag": "I CAN"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 589,
- "tag": "I L high threshold"
- },
- {
- "id": 580,
- "tag": "I M"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 575,
- "tag": "I T low threshold"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 747,
- "tag": "I_KD"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2907,
- "tag": "ModelDB:266901"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 568,
- "tag": "Parameter Fitting"
- },
- {
- "id": 620,
- "tag": "Python"
- },
- {
- "id": 596,
- "tag": "Synaptic Integration"
- }
- ],
- "timestamp_created": "2024-01-12 18:47:40.251915+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/266901",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2232": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 2232,
- "name": "Piriform cortex network model with multicompartment neurons for cell assemblies (Traub et al 2021)",
- "repository_type": "github",
- "summary": "Model contains layer 2 and layer 3 pyr cells, semilunar cells, and multiple types of superficial and deep interneurons. Used to investigate how cell assemblies and sharp waves emerge in different parameter regimes. Correlated with experimental recording. May be useful to better understand how the structure could be used for associative memory.",
- "tags": [
- {
- "id": 710,
- "tag": "FORTRAN"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2908,
- "tag": "ModelDB:266902"
- }
- ],
- "timestamp_created": "2024-01-12 18:47:40.893888+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/266902",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2233": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 2233,
- "name": "CA3 hippocampal pyramidal neuron with voltage-clamp intrinsic conductance data (Traub et al 1991)",
- "repository_type": "github",
- "summary": "This is a third-party implementation of the model from Traub et al 1991; as of 2021, Google Scholar reports about 780 citation articles. This model was one of the first biophysical models of a hippocampal pyramidal neuron with realistic conductances and the conductance equations have been used as a starting point for many models since, particularly those examining calcium dynamics and bursting.",
- "tags": [
- {
- "id": 579,
- "tag": "Active Dendrites"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2909,
- "tag": "ModelDB:266905"
- },
- {
- "id": 577,
- "tag": "NEURON"
- }
- ],
- "timestamp_created": "2024-01-12 18:47:41.402384+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/266905",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2234": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 2234,
- "name": "The role of network connectivity on epileptiform activity (Giacopelli et al 2021)",
- "repository_type": "github",
- "summary": "A number of potentially important mechanisms have been identified as key players to generate epileptiform activity, such as genetic mutations, activity-dependent alteration of synaptic functions, and functional network reorganization at the macroscopic level. Here we study how network connectivity at cellular level can affect the onset of epileptiform activity, using computational model networks with different wiring properties. The model suggests that networks connected as in real brain circuits are more resistant to generate seizure-like activity. The results suggest new experimentally testable predictions on the cellular network connectivity in epileptic individuals, and highlight the importance of using the appropriate network connectivity to investigate epileptiform activity with computational models.",
- "tags": [
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2910,
- "tag": "ModelDB:266910"
- }
- ],
- "timestamp_created": "2024-01-12 18:47:41.900484+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/266910",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2235": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "master",
- "id": 2235,
- "name": "Ambient glutamate shapes AMPA receptor responses to simulated transients (Balmer et al. 2021)",
- "repository_type": "github",
- "summary": "To explore how ambient glutamate contributes to the generation of ultra-slow signaling through AMPARs at the cerebellar unipolar brush cell synapse, we created this 13-state kinetic model in NEURON. A tool was also created to produce trains of glutamate concentration transients using 2D or 3D diffusion equations, a sum of up to 3 exponentials, or an alpha function that can be applied to the AMPA receptor model. \r\nAfter compiling the model using mkrndll, run 'mosinit_fast-flow.hoc' to simulate fast application of glutamate to the AMPA receptor model. 'mosinit_GluTransTrainTool_demo.hoc' opens a session where trains of synaptic glutamate transients can be created using various equations. The top panel shows the glutamate concentration transients (in mM) and the bottom panel shows the AMPA receptor mediated currents (in nA).",
- "tags": [
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2911,
- "tag": "ModelDB:266925"
- },
- {
- "id": 577,
- "tag": "NEURON"
- }
- ],
- "timestamp_created": "2024-01-12 18:47:42.469938+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/266925",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2236": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 2236,
- "name": "Reaction-diffusion sims of Ca2+ signals in astrocytic branchlets at the nanoscale (Denizot et al 22)",
- "repository_type": "github",
- "summary": "Reaction-Diffusion simulations are performed in geometries that were designed from the latest data available from super-resolution microscopy on astrocytes, published by Arizono et al., Nature Communications, 2020. The high spatial resolution of this model allows to propose plausible mechanisms by which astrocyte morphology at the nanoscale, notably shaft width, can influence local calcium dynamics and thus affect specialized neuron-astrocyte communication.",
- "tags": [
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2912,
- "tag": "ModelDB:266928"
- },
- {
- "id": 1919,
- "tag": "Reaction-diffusion"
- },
- {
- "id": 1574,
- "tag": "STEPS"
- }
- ],
- "timestamp_created": "2024-01-12 18:47:42.960534+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/266928",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2237": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 2237,
- "name": "Astrocyte and Blood Vessel Calcium Imaging Tracking code (Haidey et al 2021)",
- "repository_type": "github",
- "summary": "Code for tracking Astrocytes/Blood vessels in Calcium Imaging based recordings from ...\r\n\r\nData files should be loaded as .tiff stacks with several options for processing (see matlab file). \r\n\r\nThe main-script is tracking_script.m which can be used to track multiple .tiff stacks simultaneously \r\n\r\nThe sub-function distance finder outputs various metrics computed from the blood vessel tracking, (e.g. blood vessel width measured in several ways, etc.) \r\n\r\nThese metrics, among others (e.g. cross sectional area, etc.) are then recorded into an .xls file as the final output. \r\n\r\nFor further details, please see \r\n\r\nHaidey JN, Peringod G, Institoris A, Gorzo KA, Nicola W, Vandal M, Ito K, Liu S, Fielding C, Visser F, Nguyen MD. Astrocytes regulate ultra-slow arteriole oscillations via stretch-mediated TRPV4-COX-1 feedback. Cell Reports. 2021 Aug 3;36(5):109405.\r\n\r\nhttps://doi.org/10.1016/j.celrep.2021.109405",
- "tags": [
- {
- "id": 572,
- "tag": "Calcium dynamics"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2913,
- "tag": "ModelDB:266929"
- }
- ],
- "timestamp_created": "2024-01-12 18:47:43.462721+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/266929",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2238": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 2238,
- "name": "Multifunctional control of feeding in Aplysia (Webster-Wood et al. 2020)",
- "repository_type": "github",
- "summary": "Hybrid Boolean network implementation of a functional model of key feeding behaviors (biting, swallowing, rejection) and behavioral switching induced by sensory cues. Incorporates known neural connectivity and a mechanical model of the feeding apparatus.",
- "tags": [
- {
- "id": 2914,
- "tag": "Behavioral switching"
- },
- {
- "id": 566,
- "tag": "Bursting"
- },
- {
- "id": 855,
- "tag": "Connectivity matrix"
- },
- {
- "id": 729,
- "tag": "Invertebrate"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2915,
- "tag": "ModelDB:266933"
- },
- {
- "id": 620,
- "tag": "Python"
- }
- ],
- "timestamp_created": "2024-01-12 18:47:44.115877+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/266933",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2239": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 2239,
- "name": "Thalamo-cortical microcircuit (TCM) (AmirAli Farokhniaee and Madeleine M. Lowery 2021)",
- "repository_type": "github",
- "summary": "This is a model of exaggerated beta rhythm observed in the motor cortex, similar to animal and humans with Parkinson\u2019s disease. It is obtained by manually changing the specific cortical, thalamic and thalamocortical synaptic connections, motivated by the previous studies in the field. More importantly and in addition, it serves as a thalamocortical network model of deep brain stimulation, a therapy used for Parkinson\u2019s disease. We computationally stimulated the layer 5 pyramidal neurons of the cortex by direct injected currents to those pyramidal cells and observed well-known patterns in experimental studies, such as attenuation of the exaggerated beta rhythm, formation of excited and inhibited clusters of neurons in the motor cortex and the optimum value for the stimulation, both in amplitude and frequency domains, to obtain the most attenuated beta rhythm.\r\n ",
- "tags": [
- {
- "id": 2042,
- "tag": "Beta oscillations"
- },
- {
- "id": 831,
- "tag": "Deep brain stimulation"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2916,
- "tag": "ModelDB:266941"
- }
- ],
- "timestamp_created": "2024-01-12 18:47:44.623326+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/266941",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2240": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 2240,
- "name": "Voltage-gated conductances can counteract filtering effect of membrane capacitance (Heras et al '16)",
- "repository_type": "github",
- "summary": "Phenomenological inductance generated by voltage-gated ionic conductances (Na or K) can increase the gain bandwidth product of subthreshold signaling (e.g. psps) in a neuron, reducing the attenuation and slowing caused by membrane capacitance.",
- "tags": [
- {
- "id": 786,
- "tag": "Electrotonus"
- },
- {
- "id": 2917,
- "tag": "Gain-bandwidth product (GBWP)"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 729,
- "tag": "Invertebrate"
- },
- {
- "id": 2122,
- "tag": "Membrane Properties"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2918,
- "tag": "ModelDB:266948"
- },
- {
- "id": 2919,
- "tag": "Phenomenological inductance"
- },
- {
- "id": 620,
- "tag": "Python"
- },
- {
- "id": 2920,
- "tag": "pHHotoreceptor"
- }
- ],
- "timestamp_created": "2024-01-12 18:47:45.345776+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/266948",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2241": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 2241,
- "name": "E-I balance modulates formation and dynamics of neuronal assemblies (Sadeh and Clopath, 2021)",
- "repository_type": "github",
- "summary": "\"Here we studied this question in large-scale cortical networks composed of excitatory (E) and inhibitory (I) neurons. We found that the dynamics of the network in which neuronal assemblies are embedded is important for their induction. In networks with strong E-E coupling at the border of E-I balance, increasing the number of perturbed neurons enhanced the potentiation of ensembles. This was, however, accompanied by off-target potentiation of connections from unperturbed neurons. When strong E-E connectivity was combined with dominant E-I interactions, formation of ensembles became specific. Counter-intuitively, increasing the number of perturbed neurons in this regime decreased the average potentiation of individual synapses, leading to an optimal assembly formation at intermediate sizes. This was due to potent lateral inhibition in this regime, which also slowed down the formation of neuronal assemblies, resulting in a speed-accuracy trade-off in the performance of the networks in pattern completion and behavioral discrimination. Our results therefore suggest that the two regimes might be suited for different cognitive tasks, with fast regimes enabling crude detections and slow but specific regimes favoring finer discriminations.\"",
- "tags": [
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2921,
- "tag": "ModelDB:266954"
- }
- ],
- "timestamp_created": "2024-01-12 18:47:45.857601+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/266954",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2242": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 2242,
- "name": "Coincidence detection in MSO principal cells (Goldwyn et al. 2019)",
- "repository_type": "github",
- "summary": "How a particular combination of anatomical and biophysical properties results in a short integration window (good for detection of closely-coincident inputs) while also enabling efficient axonal firing with brief interspike intervals (needed to faithfully report a series of coincidences between high frequency presynaptic spike trains).",
- "tags": [
- {
- "id": 595,
- "tag": "Coincidence Detection"
- },
- {
- "id": 2922,
- "tag": "Equivalent PI circuit"
- },
- {
- "id": 2325,
- "tag": "Excitability"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 770,
- "tag": "I_KLT"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2923,
- "tag": "ModelDB:266961"
- },
- {
- "id": 596,
- "tag": "Synaptic Integration"
- },
- {
- "id": 2924,
- "tag": "Two-port analysis of electrotonus"
- },
- {
- "id": 2925,
- "tag": "Voltage transfer ratio"
- }
- ],
- "timestamp_created": "2024-01-12 18:47:46.441444+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/266961",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2243": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 2243,
- "name": "Cardiac models of circadian rhythms in early afterdepolarizations & arrhythmias (Diekman & Wei 2021)",
- "repository_type": "github",
- "summary": "We fit a simplified Luo-Rudy model to voltage-clamp data showing a circadian rhythm in L-type calcium conductance. Simulations of the model (single-cell and 2-D spatial versions) suggest that circadian rhythms in early afterdepolarizations may contribute to daily rhythms in cardiac arrhythmias and sudden cardiac death.",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 804,
- "tag": "Bifurcation"
- },
- {
- "id": 797,
- "tag": "Cardiac pacemaking"
- },
- {
- "id": 1586,
- "tag": "Circadian Rhythms"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 655,
- "tag": "MATLAB"
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The model is according to the paperWhich Model to Use for Cortical Spiking Neurons? Figure1(O) threshold variability has been reproduced by MathSBML. The ODE and the parameters values are taken from the a paper Simple Model of Spiking NeuronsThe original format of the models are encoded in the MATLAB format existed in the ModelDB with Accession number 39948
Figure1 are the simulation results of the same model with different choices of parameters and different stimulus function or events.a=0.03; b=0.25; c=-60; d=4; V=-64; u=b*V;
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- "summary": "We computed the steady-state activity of a large-scale model of the granular layer of the rat cerebellum. Within a few tens of milliseconds after the start of random mossy fiber input, the populations of Golgi and granule cells became entrained in a single synchronous oscillation, the basic frequency of which ranged from 10 to 40 Hz depending on the average rate of firing in the mossy fiber population. ... The synchronous, rhythmic firing pattern was robust over a broad range of biologically realistic parameter values and to parameter randomization. Three conditions, however, made the oscillations more transient and could desynchronize the entire network in the end: a very low mossy fiber activity, a very dominant excitation of Golgi cells through mossy fiber synapses (rather than through parallel fiber synapses), and a tonic activation of granule cell GABAA receptors (with an almost complete absence of synaptically induced inhibitory postsynaptic currents). The model predicts that, under conditions of strong mossy fiber input to the cerebellum, Golgi cells do not only control the strength of parallel fiber activity but also the timing of the individual spikes. Provided that their parallel fiber synapses constitute an important source of excitation, Golgi cells fire rhythmically and synchronized with granule cells over large distances along the parallel fiber axis. See paper for more and details.",
- "tags": [
- {
- "id": 750,
- "tag": "GENESIS (web link to model)"
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- {
- "id": 590,
- "tag": "I A"
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- {
- "id": 576,
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- "id": 581,
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- "id": 589,
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- "id": 564,
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- "id": 2937,
- "tag": "ModelDB:50219"
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- "id": 569,
- "tag": "Simplified Models"
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- "id": 586,
- "tag": "Synchronization"
- }
- ],
- "timestamp_created": "2025-01-27 12:54:09.354510+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/50219",
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- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
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- "default_context": "master",
- "id": 2261,
- "name": "Vertical System (VS) tangential cells network model (Trousdale et al. 2014)",
- "repository_type": "github",
- "summary": "Network model of the VS tangential cell system, with 10 cells per hemisphere. Each cell is a two compartment model with one compartment for dendrites and one for the axon. The cells are coupled through axonal gap junctions. The code allows to simulate responses of the VS network to a variety of visual stimuli to investigate coding as a function of gap junction strength.",
- "tags": [
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- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 855,
- "tag": "Connectivity matrix"
- },
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- "id": 729,
- "tag": "Invertebrate"
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- "id": 564,
- "tag": "ModelDB"
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- "id": 2938,
- "tag": "ModelDB:155727"
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- "id": 620,
- "tag": "Python"
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- "id": 569,
- "tag": "Simplified Models"
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- "id": 587,
- "tag": "Spatio-temporal Activity Patterns"
- }
- ],
- "timestamp_created": "2025-01-27 14:52:07.733272+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/155727",
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- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "id": 2262,
- "name": "Impact on backpropagation of the spatial heterogeneity of sodium channel kinetics in the axon initial segment (Barlow et al., 2024)",
- "repository_type": "github",
- "summary": "Model code for: 'Impact on backpropagation of the spatial heterogeneity of sodium channel kinetics in the axon initial segment', provisionally accepted at PLOS Computational Biology. ",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 579,
- "tag": "Active Dendrites"
- },
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
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- "id": 1531,
- "tag": "I Cl, leak"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 567,
- "tag": "Ion Channel Kinetics"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2939,
- "tag": "ModelDB:267088"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 740,
- "tag": "Na/K pump"
- },
- {
- "id": 620,
- "tag": "Python"
- },
- {
- "id": 1919,
- "tag": "Reaction-diffusion"
- }
- ],
- "timestamp_created": "2025-01-27 15:28:00.222162+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/267088",
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- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "id": 2263,
- "name": "An ODE model of the inspiratory & sigh rhythms (Borrus et al., 2024)",
- "repository_type": "github",
- "summary": "Our work aims to understand the cellular and synaptic mechanisms underlying eupnea and sigh rhythms in the brain. Part of our work benefited from a mathematical model that made predictions about key components of both rhythm generators. We show a network a neurons can generate two oscillations simultaneously via different mechanisms.",
- "tags": [
- {
- "id": 1527,
- "tag": "Brain Rhythms"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2940,
- "tag": "ModelDB:267252"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 1536,
- "tag": "Respiratory control"
- },
- {
- "id": 759,
- "tag": "XPPAUT"
- }
- ],
- "timestamp_created": "2025-01-27 15:28:01.244095+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/267252",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "auto_sync": true,
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- ],
- "default_context": "main",
- "id": 2264,
- "name": "D1-MSN: The effect of EAAC1 on firing frequency (Petroccione et al., 2023)",
- "repository_type": "github",
- "summary": "",
- "tags": [
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2941,
- "tag": "ModelDB:267267"
- },
- {
- "id": 577,
- "tag": "NEURON"
- }
- ],
- "timestamp_created": "2025-01-27 15:28:01.837749+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/267267",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "auto_sync": true,
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- "modeling"
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- "default_context": "main",
- "id": 2265,
- "name": "Biochemically detailed model of post-synaptic plasticity for computational analyses of schizophrenia (Maki-Marttunen et al. in press)",
- "repository_type": "github",
- "summary": "",
- "tags": [
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- "id": 749,
- "tag": "Long-term Synaptic Plasticity"
- },
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- "id": 564,
- "tag": "ModelDB"
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- "id": 2942,
- "tag": "ModelDB:267741"
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- "id": 577,
- "tag": "NEURON"
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- "id": 802,
- "tag": "STDP"
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- "id": 725,
- "tag": "Synaptic Plasticity"
- }
- ],
- "timestamp_created": "2025-01-27 15:28:03.893523+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/267741",
- "user": {
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- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
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- "default_context": "main",
- "id": 2266,
- "name": "Myelin dystrophy impairs signal transmission and working memory in a multiscale model of the aging prefrontal cortex (Iba\u00f1ez, Sengupta et al., 2024)",
- "repository_type": "github",
- "summary": "This study aims to quantify the effects of specific myelin dystrophies, such as demyelination and remyelination, which have been observed in the aging rhesus dlPFC, on the propagation of action potentials (APs) in layer 3 pyramidal neurons. Furthermore, this study sheds light on how such age-related myelin changes affect a core cognitive function: spatial working memory.",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 2255,
- "tag": "Brian 2"
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- "id": 655,
- "tag": "MATLAB"
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- "tag": "ModelDB"
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- "id": 2943,
- "tag": "ModelDB:2014821"
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- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 620,
- "tag": "Python"
- },
- {
- "id": 794,
- "tag": "Working memory"
- }
- ],
- "timestamp_created": "2025-01-27 15:28:05.267194+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/2014821",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "default_context": "main",
- "id": 2267,
- "name": "Data-driven multiscale model of macaque auditory thalamocortical circuits reproduces in vivo dynamics (Dura-Bernal et al., 2023)",
- "repository_type": "github",
- "summary": "\"We developed a detailed model of macaque auditory thalamocortical circuits, including primary auditory cortex (A1), medial geniculate body (MGB), and thalamic reticular nucleus, utilizing the NEURON simulator and NetPyNE tool. The A1 model simulates a cortical column with over 12,000 neurons and 25 million synapses, incorporating data on cell-type-specific neuron densities, morphology, and connectivity across six cortical layers. It is reciprocally connected to the MGB thalamus, which includes interneurons and core and matrix-layer-specific projections to A1. The model simulates multiscale measures, including physiological firing rates, local field potentials (LFPs), current source densities (CSDs), and electroencephalography (EEG) signals. Laminar CSD patterns, during spontaneous activity and in response to broadband noise stimulus trains, mirror experimental findings. Physiological oscillations emerge spontaneously across frequency bands comparable to those recorded in vivo. We elucidate population-specific contributions to observed oscillation events and relate them to firing and presynaptic input patterns. The model offers a quantitative theoretical framework to integrate and interpret experimental data and predict its underlying cellular and circuit mechanisms.\"",
- "tags": [
- {
- "id": 762,
- "tag": "Audition"
- },
- {
- "id": 1546,
- "tag": "Evoked LFP"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 589,
- "tag": "I L high threshold"
- },
- {
- "id": 721,
- "tag": "I N"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 575,
- "tag": "I T low threshold"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 856,
- "tag": "Laminar Connectivity"
- },
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- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2944,
- "tag": "ModelDB:2014832"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 659,
- "tag": "NetPyNE"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- }
- ],
- "timestamp_created": "2025-01-27 15:28:06.721268+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/2014832",
- "user": {
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- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "2268": {
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- "default_context": "main",
- "id": 2268,
- "name": "Kinetics and functional consequences of BK Channels activation by N-type Ca2+ channels in the dendrite of mouse neocortical layer-5 pyramidal neurons (Bl\u00f6mer et al., 2024)",
- "repository_type": "github",
- "summary": "The back propagation of an action potential (AP) from the axon/soma to the dendrites plays a central role in dendritic integration. This process involves the intricate orchestration of various ion channels, yet a comprehensive understanding of the contribution of each channel type remains elusive. In this study, we leverage ultrafast membrane potential recordings (Vm) and Ca2+ imaging techniques to shed light on the involvement of N-type voltage-gated Ca2+ channels (VGCCs) in layer-5 neocortical pyramidal neurons' apical dendrites.\r\nOur findings reveal a selective interaction between N-type VGCCs and large-conductance Ca2+-activated K+ channels (BK CAKCs). Remarkably, we observe that BK CAKCs are activated within a mere 500 \u00b5s after the AP peak, preceding the peak of the Ca2+ current triggered by the AP. Consequently, when N-type VGCCs are inhibited, the early broadening of the AP shape amplifies the activity of other VGCCs, leading to an augmented total Ca2+ influx. Our NEURON model, constructed to replicate and support these experimental results, underscores the critical coupling between N-type and BK channels.\r\nThis study not only redefines the conventional role of N-type VGCCs as primarily involved in presynaptic neurotransmitter release but also establishes their distinct and essential function as activators of BK CAKCs in neuronal dendrites. Furthermore, our results provide original functional validation of a physical interaction between Ca2+ and K+ channels, elucidated through ultrafast kinetic reconstruction. This insight enhances our understanding of the intricate mechanisms governing neuronal signaling and may have far-reaching implications in the field.\r\n",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 579,
- "tag": "Active Dendrites"
- },
- {
- "id": 565,
- "tag": "Dendritic Action Potentials"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 2162,
- "tag": "I Na, slow inactivation"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 2318,
- "tag": "IK Bkca"
- },
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- "id": 2319,
- "tag": "IK Skca"
- },
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- "id": 564,
- "tag": "ModelDB"
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- "id": 2945,
- "tag": "ModelDB:2015410"
- },
- {
- "id": 577,
- "tag": "NEURON"
- }
- ],
- "timestamp_created": "2025-01-27 15:28:08.528594+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/2015410",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "2269": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 2269,
- "name": "Touch-Motor Circuit (Gradwell et al., 2024)",
- "repository_type": "github",
- "summary": "A modified motor network model (from Moraud et al. 2016 and Formento et al. 2018) with added cutaneous input and dPV neuron model.",
- "tags": [
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2946,
- "tag": "ModelDB:2015411"
- },
- {
- "id": 659,
- "tag": "NetPyNE"
- }
- ],
- "timestamp_created": "2025-01-27 15:28:09.037063+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/2015411",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "default_context": "main",
- "id": 2270,
- "name": "Modeling realistic synaptic inputs of CA1 hippocampal pyramidal neurons and interneurons via Adaptive Generalized Leaky Integrate-and-Fire models (Marascoa et al., 2024)",
- "repository_type": "github",
- "summary": "",
- "tags": [
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- "id": 736,
- "tag": "Action Potentials"
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- {
- "id": 564,
- "tag": "ModelDB"
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- {
- "id": 2947,
- "tag": "ModelDB:2015423"
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- {
- "id": 611,
- "tag": "NEST"
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- "tag": "Python"
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- "timestamp_created": "2025-01-27 15:28:11.856712+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/2015423",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "2271": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
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- ],
- "default_context": "main",
- "id": 2271,
- "name": "Axonal K channel inhibition promotes ectopic burst of hippocampal mossy fiber (Kamiya 2024)",
- "repository_type": "github",
- "summary": "Simulation of ectopic burst firings from distal axons induced by local inhibition of axonal K channels on the hippocampal mossy fibers.",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 728,
- "tag": "Axonal Action Potentials"
- },
- {
- "id": 2325,
- "tag": "Excitability"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 564,
- "tag": "ModelDB"
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- {
- "id": 2948,
- "tag": "ModelDB:2015571"
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- {
- "id": 577,
- "tag": "NEURON"
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- ],
- "timestamp_created": "2025-01-27 15:28:12.342184+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/2015571",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "2272": {
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- "content_types": "modeling",
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- "default_context": "main",
- "id": 2272,
- "name": "Unipolar brush cell circuits extend and diversify spiking patterns (Hariani et al., 2023)",
- "repository_type": "github",
- "summary": "Sensory signals are processed by the cerebellum to coordinate movements. Unipolar brush cells (UBCs) are excitatory interneurons that project to granule cells and transform their input into prolonged increases or decreases in firing, depending on their ON or OFF UBC subtype. Further extension and diversification of the input signal could be produced by UBCs that project to one another, but whether this circuitry exists was unclear. In this work we showed that UBCs innervate one another using transgenic mice and immunohistochemistry. This NEURON model explores how these feed-forward networks of UBCs could extend the length of bursts or pauses and introduce delays\u2014transformations that may be necessary for cerebellar functions from modulation of eye movements to adaptive learning across time scales.",
- "tags": [
- {
- "id": 564,
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- "id": 2949,
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- "timestamp_created": "2025-01-27 15:28:12.920411+00:00",
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- "uri": "https://github.com/OpenSourceBrain/2015953",
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- "id": 2273,
- "name": "Respiratory control model with brainstem CPG and sensory feedback adapted for COVID-19 associated silent hypoxemia (Diekman et al., 2024)",
- "repository_type": "github",
- "summary": "This is an updated version of a closed-loop respiratory control model incorporating a central pattern generator (CPG), the Butera-Rinzel-Smith (BRS) model, together with lung mechanics, oxygen handling, and chemosensory components (see accession number 229640). We explored model parameters consistent with the silent hypoxemia phenomenon observed in some COVID-19 patients.",
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- "id": 2456,
- "tag": "COVID-19"
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- "id": 576,
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- "id": 2950,
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- "id": 2236,
- "tag": "Pacemaking mechanism"
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- "id": 1536,
- "tag": "Respiratory control"
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- "timestamp_created": "2025-01-27 15:28:13.426869+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/2015954",
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- "id": 2274,
- "name": "Hippocampal O-LM interneurons and hippocampo-septal neurons with simplified and detailed biophysics (Tak\u00e1cs et al, 2024)",
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- "id": 578,
- "tag": "Activity Patterns"
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- "id": 590,
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- "id": 583,
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- "timestamp_created": "2025-01-27 15:28:13.965187+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/2016137",
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- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
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- "id": 2275,
- "name": "Heterogeneous Purkinje Cell model (Cirtala and De Schutter, 2024)",
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- "summary": "We propose the first computational model of cerebellar Purkinje cell with dendritic heterogeneity. Each branch in our model is an individual unit and is characterized by its own set ion channel conductance density. We model clustered parallel fiber input and we measure the peak amplitude of a response. We observe how changes in P-type calcium conductance density changes the peak amplitude response from linear to bimodal step-plateau and vice-versa for each branch of the dendritic tree. We show how the dendritic calcium spikes propagate and how Kv4 channels block spreading depolarization to nearby branches. ",
- "tags": [
- {
- "id": 565,
- "tag": "Dendritic Action Potentials"
- },
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- "id": 571,
- "tag": "Detailed Neuronal Models"
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- "id": 583,
- "tag": "I Calcium"
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- "id": 584,
- "tag": "I Potassium"
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- "id": 575,
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- "id": 763,
- "tag": "Intrinsic plasticity"
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- "id": 596,
- "tag": "Synaptic Integration"
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- "timestamp_created": "2025-01-27 15:28:14.477504+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/2016138",
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- "id": 2276,
- "name": "A novel mechanism for ramping bursts based on slow negative feedback in model respiratory neurons (John et al., 2024)",
- "repository_type": "github",
- "summary": "Recordings from pre-Botzinger complex neurons responsible for the inspiratory phase of the respiratory rhythm reveal a ramping burst pattern, starting around the time that the transition from expiration to inspiration begins, in which the spike rate gradually rises until a transition into a high-frequency burst occurs. The spike rate increase along the burst is accompanied by a gradual depolarization of the plateau potential that underlies the spikes. These effects may be functionally important for inducing the onset of inspiration and hence maintaining effective respiration; however, most mathematical models for inspiratory bursting do not capture this activity pattern. Here, we study how the modulation of spike height and afterhyperpolarization via the slow inactivation of an inward current can support various activity patterns including ramping bursts. We use dynamical systems methods designed for multiple timescale systems, such as bifurcation analysis based on timescale decomposition and averaging over fast oscillations, to generate an understanding of and predictions about the specific dynamic effects that lead to ramping bursts. We also analyze how transitions between ramping and other activity patterns may occur with parameter changes, which could be associated with experimental manipulations, environmental conditions and/or development.",
- "tags": [
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 2162,
- "tag": "I Na, slow inactivation"
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- "id": 655,
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- "timestamp_created": "2025-01-27 15:28:14.978231+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/2016216",
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- "default_context": "main",
- "id": 2277,
- "name": "A model of rodent mechanoreceptors (LTMRs) (Medlock et al., 2024)",
- "repository_type": "github",
- "summary": "\"... unlike the dichotomous frequency preference characteristic of RA1 and RA2/Pacinian afferents in other species, rodent RAs fell along a continuum. Fitting generalized linear models (GLMs) to experimental data reproduced the reliability and precision of rodent RAs. The resulting model parameters highlight key mechanistic differences across the RA spectrum; specifically, the integration window of different RAs transitions from wide to narrow as tuning preferences across the population move from low to high frequencies...\"",
- "tags": [
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- "id": 655,
- "tag": "MATLAB"
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- "id": 764,
- "tag": "Touch"
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- "timestamp_created": "2025-01-27 15:28:15.460071+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/2016218",
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- "id": 2278,
- "name": "Thalamocortical sleep model (Fink et. al., 2024, and Krishnan et al., 2016)",
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- "summary": "While many theoretical models of neural dynamics during sleep exist, few include the effects of neuromodulators on sleep oscillations and describe transitions between different states of vigilance. Here, we ported an established thalamocortical network model (https://doi.org/10.7554/eLife.18607) from C++ to NEURON. This model, which includes a biophysically realistic description of intrinsic and synaptic channels, allows for testing the effects of different neuromodulators, intrinsic cell properties, and synaptic connectivity on neural dynamics during sleep. ",
- "tags": [
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- "id": 576,
- "tag": "I K"
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- "id": 581,
- "tag": "I K,Ca"
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- "id": 591,
- "tag": "I K,leak"
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- "id": 739,
- "tag": "I Na,p"
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- "id": 575,
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- "id": 2955,
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- "timestamp_created": "2025-01-27 15:28:15.949605+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/2016601",
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- "id": 2279,
- "name": "Persistent Interruption in Parvalbumin-Positive Inhibitory Interneurons: Biophysical and Mathematical Mechanisms (Upchurch et al., 2024)",
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- "summary": "",
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- "id": 582,
- "tag": "I Sodium"
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- "id": 620,
- "tag": "Python"
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- "timestamp_created": "2025-01-27 15:28:16.505766+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/2016658",
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- "id": 2280,
- "name": "Synaptic plasticity for hippocampal place field formation and dynamics (Savelli 2024)",
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- "summary": "The model illustrates how the plastic integration of spatially stable grid-cell inputs could contribute to hippocampal place fields' generation and dynamic character. Theoretically, the grid-to-place transformation is possible if a place cell can respond selectively to a combination of suitably aligned grids. A synaptic plasticity rule whereby postsynaptic activation gates synaptic change while presynaptic activation determines its direction can accomplish this task during rat foraging behavior. The synaptic competition can outlast the formation of place fields, contributing to their spatial reorganization over time when the model is run in larger environments and the topographical/modular organization of grid inputs is considered. Co-simulated cells that differ only by their randomly assigned grid inputs display different degrees and kinds of spatial reorganization - ranging from place-field remapping to more subtle in-field changes or lapses in firing. The model predicts a greater number of place fields and propensity for remapping in place cells recorded from more septal regions of the hippocampus and/or in larger environments, motivating future experimental standardization across studies and animal models.",
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- "id": 755,
- "tag": "C or Cplusplus program"
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- "id": 1461,
- "tag": "Grid cell"
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- "id": 808,
- "tag": "Hebbian plasticity"
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- "id": 564,
- "tag": "ModelDB"
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- "id": 2957,
- "tag": "ModelDB:2016659"
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- "id": 799,
- "tag": "Place cell/field"
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- "id": 800,
- "tag": "Spatial Navigation"
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- "id": 725,
- "tag": "Synaptic Plasticity"
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- ],
- "timestamp_created": "2025-01-27 15:28:17.018509+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/2016659",
- "user": {
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- "id": 2281,
- "name": "Equivalent excitability achieved via different Nav subtypes (Xie et al., 2024)",
- "repository_type": "github",
- "summary": "Abstract: Nociceptive sensory neurons convey pain signals to the CNS using action potentials. Loss-of-function mutations in the voltage-gated sodium channel NaV1.7 cause insensitivity to pain (presumably by reducing nociceptor excitability) but efforts to treat pain by inhibiting NaV1.7 pharmacologically have largely failed. This may reflect the variable contribution of NaV1.7 to nociceptor excitability. Contrary to claims that NaV1.7 is necessary for nociceptors to initiate action potentials, we show that nociceptors can achieve equivalent excitability using different combinations of NaV1.3, NaV1.7, and NaV1.8. Selectively blocking one of those NaV subtypes reduces nociceptor excitability only if the other two subtypes are weakly expressed. For example, excitability relies on NaV1.8 in acutely dissociated nociceptors but responsibility shifts to NaV1.7 and NaV1.3 by the fourth day in culture. A similar shift in NaV dependence occurs in vivo after inflammation, impacting ability of the NaV1.7-selective inhibitor PF-05089771 to reduce pain in behavioral tests. Flexible use of different NaV subtypes \u2013 an example of degeneracy \u2013 compromises the reliable modulation of nociceptor excitability by subtype-selective inhibitors. Identifying the dominant NaV subtype to predict drug efficacy is not trivial. Degeneracy at the cellular level must be considered when choosing drug targets at the molecular level.",
- "tags": [
- {
- "id": 655,
- "tag": "MATLAB"
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- {
- "id": 564,
- "tag": "ModelDB"
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- "id": 2958,
- "tag": "ModelDB:2016663"
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- "timestamp_created": "2025-01-27 15:28:17.478820+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/2016663",
- "user": {
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- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
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- "username": "osbadmin"
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- "default_context": "main",
- "id": 2282,
- "name": "Electrical properties of dendritic spines (Popovic et al. 2015)",
- "repository_type": "github",
- "summary": "An electrochromic dye was used to make fast, high signal/noise ratio, linear scale optical measurements of membrane potential from spines and basal dendrites of mouse somatosensory cortex layer 5 pyramidal cells. These experiments revealed close electrical coupling, with little signal loss, for membrane potential spreading from the spine head to the adjacent dendritic shaft. Modeling was used to explore the relationship between cellular properties (anatomy and biophysics) and the degree of electrical coupling between spines and dendrites. For usage instructions, see readme.pdf",
- "tags": [
- {
- "id": 786,
- "tag": "Electrotonus"
- },
- {
- "id": 564,
- "tag": "ModelDB"
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- "id": 2959,
- "tag": "ModelDB:2016666"
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- "id": 577,
- "tag": "NEURON"
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- "id": 596,
- "tag": "Synaptic Integration"
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- {
- "id": 2924,
- "tag": "Two-port analysis of electrotonus"
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- "id": 2925,
- "tag": "Voltage transfer ratio"
- }
- ],
- "timestamp_created": "2025-01-27 15:28:17.953231+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/2016666",
- "user": {
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- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
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- "id": 2283,
- "name": "Cholinergic modulation of resting state networks (Sanda et al., 2024)",
- "repository_type": "github",
- "summary": "Brain activity during the resting state is widely used to examine brain organization, cognition and alterations in disease states. While it is known that neuromodulation and the state of alertness impact resting-state activity, neural mechanisms behind such modulation of resting-state activity are unknown. In this work, we used a computational model to demonstrate that change in excitability and recurrent connections, due to cholinergic modulation, impacts resting-state activity. The results of such modulation in the model match closely with experimental work on direct cholinergic modulation of Default Mode Network (DMN) in rodents. We further extended our study to the human connectome derived from diffusion-weighted MRI. In human resting-state simulations, an increase in cholinergic input resulted in a brain-wide reduction of functional connectivity. Furthermore, selective cholinergic modulation of DMN closely captured experimentally observed transitions\r\nbetween the baseline resting state and states with suppressed DMN fluctuations associated with attention to external tasks. Our study thus provides insight into potential neural mechanisms for the effects of cholinergic neuromodulation on resting-state activity and its dynamics.\r\n",
- "tags": [
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- "id": 755,
- "tag": "C or Cplusplus program"
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- "id": 571,
- "tag": "Detailed Neuronal Models"
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- "id": 2325,
- "tag": "Excitability"
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- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 576,
- "tag": "I K"
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- {
- "id": 581,
- "tag": "I K,Ca"
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- {
- "id": 591,
- "tag": "I K,leak"
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- {
- "id": 739,
- "tag": "I Na,p"
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- "id": 594,
- "tag": "I h"
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- "id": 861,
- "tag": "I_K,Na"
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- "id": 1685,
- "tag": "KCC2"
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- "id": 564,
- "tag": "ModelDB"
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- {
- "id": 2960,
- "tag": "ModelDB:2016670"
- },
- {
- "id": 740,
- "tag": "Na/K pump"
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- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 586,
- "tag": "Synchronization"
- }
- ],
- "timestamp_created": "2025-01-27 15:28:18.530067+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/2016670",
- "user": {
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- "id": 2284,
- "name": "Markovian model for HCN-encoded current regulated by capsazepine (Wong et al., 2024)",
- "repository_type": "github",
- "summary": "Capsazepine (CPZ) was recognized as a synthetic inhibitor of capsaicin activation of TRPV1 channel. TRPV1 has been demonstrated to be widely distributed in endocrine or neuroendocrine cells, and different types of central neurons. However, whether and how this compound might produce any perturbations on varying types of ionic currents, other than block of capsaicin-induced TRPV1 or activation of epithelial Na+ current, remain largely unclear. In this study, we aimed to clarify the effect of CPZ on hyperpolarization-activated cationic current (Ih, or HCN-encoded current) and voltage-gated Na+ current (INa) in pituitary GH3 cells. By use of whole-cell patch-clamp recordings, the CPZ application caused a concentration-dependent inhibition of Ih amplitude or slowing in activation time course of the current with the measured IC50 or KD value of 3.1 or 3.16 \u03bcM, respectively. The steady-state activation curve of Ih during the exposure to 3 \u03bcM CPZ was shifted toward more hyperpolarized potential by approximately 20 mV; however, no change in the gating charge of the current was noticed. In this work, a modified Markovian model designed for Ih was implemented to evaluate the plausible modifications of CPZ on the hysteresis of the current; and the model was well suited to predict CPZ-mediated decrease in hysteretic strength of Ih. The INa identified in GH3 cells was also suppressed by CPZ, despite the activation or inactivation time course of the current was changed. Moreover, under cell-attached current measurements, cell exposure to CPZ resulted in a reduction of spontaneous firing. Collectively, finding the current observations suggest that CPZ-perturbed inhibition of Ih or INa appears to be direct and independent of its action on vanilloid receptor(s); hence, such actions would be a yet unidentified but important ionic mechanism underlying perturbed intrinsic membrane excitability in the in-vivo endocrine or neuroendocrine cells, or neurons.",
- "tags": [
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 567,
- "tag": "Ion Channel Kinetics"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2961,
- "tag": "ModelDB:2016995"
- },
- {
- "id": 759,
- "tag": "XPPAUT"
- }
- ],
- "timestamp_created": "2025-01-27 15:28:19.014582+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/2016995",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2285": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 2285,
- "name": "Subthreshold conductances regulate theta-frequency LFPs and spike phase (Sinha and Narayanan, 2015)",
- "repository_type": "github",
- "summary": "What are the implications for the existence of subthreshold ion channels, their localization profiles, and plasticity on local field potentials (LFPs)? Here, we assessed the role of hyperpolarization-activated cyclic-nucleotide-gated (HCN) channels in altering hippocampal theta-frequency LFPs and the associated spike phase. We presented spatiotemporally randomized, balanced theta-modulated excitatory and inhibitory inputs to somatically aligned, morphologically realistic pyramidal neuron models spread across a cylindrical neuropil. We computed LFPs from seven electrode sites and found that the insertion of an experimentally constrained HCN-conductance gradient into these neurons introduced a location-dependent lead in the LFP phase without significantly altering its amplitude. Further, neurons fired action potentials at a specific theta phase of the LFP, and the insertion of HCN channels introduced large lags in this spike phase and a striking enhancement in neuronal spike-phase coherence. Importantly, graded changes in either HCN conductance or its half-maximal activation voltage resulted in graded changes in LFP and spike phases. Our conclusions on the impact of HCN channels on LFPs and spike phase were invariant to changes in neuropil size, to morphological heterogeneity, to excitatory or inhibitory synaptic scaling, and to shifts in the onset phase of inhibitory inputs. Finally, we selectively abolished the inductive lead in the impedance phase introduced by HCN channels without altering neuronal excitability and found that this inductive phase lead contributed significantly to changes in LFP and spike phase. Our results uncover specific roles for HCN channels and their plasticity in phase-coding schemas and in the formation and dynamic reconfiguration of neuronal cell assemblies. ",
- "tags": [
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 763,
- "tag": "Intrinsic plasticity"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2962,
- "tag": "ModelDB:2016996"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 2919,
- "tag": "Phenomenological inductance"
- },
- {
- "id": 725,
- "tag": "Synaptic Plasticity"
- }
- ],
- "timestamp_created": "2025-01-27 15:28:19.504817+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/2016996",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "2286": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 2286,
- "name": "Mouse colorectal afferent ending (Feng et al 2015)",
- "repository_type": "github",
- "summary": "This model simulates the afferent neural encoding in response to mechanical colorectal stretching. A custom-built mechano-sensitive ion channel, gated by membrane tension induced by circumferential colorectal stretch, is incorporated. A lumped parametric model has been developed to calculate membrane tension from the overall colorectal stretch.",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2963,
- "tag": "ModelDB:2017006"
- },
- {
- "id": 577,
- "tag": "NEURON"
- }
- ],
- "timestamp_created": "2025-01-27 15:28:20.206499+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/2017006",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2287": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 2287,
- "name": "Glutamate spillover and plateau potentials (Trpevski et al., 2023)",
- "repository_type": "github",
- "summary": "Plateau potentials in models of striatal projection neurons were studied. Plateau potentials are supralinear dendritic voltage elevations which have: i) high somatic voltage amplitude and ii) are threshold, or all-or-none, events (like somatic action potentials). While the high somatic amplitude can sometimes be captured in models of striatal projection neurons, their all-or-none property is not usually not. In this study, we found that including glutamate spillover consistently and robustly provides all-or-none plateaus in addition to a high somatic amplitude. This result arises due to the prolonged duration of extrasynaptic glutamate. When glutamate spillover is not included, the all-or-none behavior is very sensitive to parameters in the model for the Mg2+ block of the NMDA receptors, which is the mechanism for generating plateaus. These results suggest a potentially significant role of glutamate spillover in plateau potential generation. See the related article for more details.",
- "tags": [
- {
- "id": 579,
- "tag": "Active Dendrites"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 2396,
- "tag": "Kir, inactivating"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2964,
- "tag": "ModelDB:2017143"
- },
- {
- "id": 577,
- "tag": "NEURON"
- }
- ],
- "timestamp_created": "2025-01-27 15:28:20.680230+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/2017143",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2288": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 2288,
- "name": "C.elegans motor and interneurons (Nicoletti at al. 2024)",
- "repository_type": "github",
- "summary": "Biophysically accurate models of six classes of C. elegans neurons: AIY, RIM, and AVA interneurons, and the VA, VB, and VD motor neurons. The implemented codes reproduce current-clamp and voltage-clamp experiments reported in literature and simulate knockout neurons, with the aim to identify the biophysical mechanisms at the basis of inter and motor neuron functioning. These models represent a step forward toward the modeling of C. elegans neuronal networks and virtual experiments on the nematode nervous system.",
- "tags": [
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 2318,
- "tag": "IK Bkca"
- },
- {
- "id": 2319,
- "tag": "IK Skca"
- },
- {
- "id": 1931,
- "tag": "Kir"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2965,
- "tag": "ModelDB:2017403"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 620,
- "tag": "Python"
- }
- ],
- "timestamp_created": "2025-01-27 15:28:21.168355+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/2017403",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2289": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 2289,
- "name": "Parkinsonian Motor Network Model during Multivariable Closed-loop DBS (Fleming et al 2023)",
- "repository_type": "github",
- "summary": "We developed a computational model of the parkinsonian motor network to investigate multivariable closed-loop control strategies of deep brain stimulation (DBS) for Parkinson\u2019s disease (PD). The motor network model includes a model of the cortical basal ganglia coupled to a model of the motoneuron pool. The cortical basal ganglia model incorporates (i) the extracellular DBS electric field, (ii) antidromic and orthodromic activation of STN afferent fibers, (iii) the LFP detected at non-stimulating contacts on the DBS electrode, while (iv) the motoneuron pool model includes a model of electromyography and (v) force generated due to the activation of motoneurons in the pool. The model simulates periods of elevated beta- and tremor-band activity to facilitate investigation of tremor- and beta-based closed-loop DBS control strategies, modulating DBS amplitude, pulse duration or frequency, using clinically accessible measures of tremor- (based on the measured force signal) and beta-band activity (based on the local field potential).",
- "tags": [
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 831,
- "tag": "Deep brain stimulation"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 589,
- "tag": "I L high threshold"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 575,
- "tag": "I T low threshold"
- },
- {
- "id": 1433,
- "tag": "I_AHP"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2966,
- "tag": "ModelDB:2017405"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 585,
- "tag": "Oscillations"
- },
- {
- "id": 801,
- "tag": "Parkinson's"
- },
- {
- "id": 714,
- "tag": "PyNN"
- },
- {
- "id": 620,
- "tag": "Python"
- }
- ],
- "timestamp_created": "2025-01-27 15:28:21.690601+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/2017405",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "2290": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
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- "default_context": "main",
- "id": 2290,
- "name": "Synchronization in a realistic model of CA1 pyramidal neurons (Fiasconaro and Migliore 2024)",
- "repository_type": "github",
- "summary": "We study the synchronisation of neurons in a realistic model under the Hodgkin-Huxley dynamics. To focus on the role of the different locations of the excitatory synapses, we use two identical neurons where the set of input signals is grouped at two different distances from the soma. Synchronisation is studied using phase spiking correlation as a function of various parameters such as the distance from the soma of one of the synaptic groups, the inhibition weight and the associated activation delay.\r\nWe found that the neurons' spiking activity depends nonmonotonically on the relative dendritic location of the synapses and their inhibitory weight, whereas the synchronisation measure always decreases with inhibition, and strongly depends on its activation time delay.",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 1684,
- "tag": "Ca pump"
- },
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 731,
- "tag": "I CAN"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 589,
- "tag": "I L high threshold"
- },
- {
- "id": 580,
- "tag": "I M"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 575,
- "tag": "I T low threshold"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 747,
- "tag": "I_KD"
- },
- {
- "id": 756,
- "tag": "Methods"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 2967,
- "tag": "ModelDB:2018009"
- },
- {
- "id": 577,
- "tag": "NEURON"
- }
- ],
- "timestamp_created": "2025-01-27 15:28:22.273349+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/2018009",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "2291": {
- "auto_sync": true,
- "content_types": "modeling",
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- "default_context": "main",
- "id": 2291,
- "name": "Disinhibitory circuit for arousal effects in perceptual decision making tasks (Beerendonk et al., 2024)",
- "repository_type": "github",
- "summary": "This code reproduces the computational model of cortical circuits presented in Beerendonk, Mejias et al., PNAS 2024. The model describes a simplified population-level cortical circuit with pyramidal neurons and multiple interneuron types (PV, SST, VIP) which performs a simple perceptual decision making task. Notably, the model incorporates the effect of arousal signals on the circuit to reproduce the inverted-U relationship between task performance and arousal level found experimentally (and the corresponding U-shape between reaction times and arousal levels).",
- "tags": [
- {
- "id": 655,
- "tag": "MATLAB"
- },
- {
- "id": 564,
- "tag": "ModelDB"
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- {
- "id": 2968,
- "tag": "ModelDB:2018021"
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- ],
- "timestamp_created": "2025-01-27 15:28:22.773429+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/2018021",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "default_context": "4",
- "id": 2292,
- "name": "Edelstein1996 - EPSP ACh event",
- "repository_type": "biomodels",
- "summary": "
Edelstein1996 - EPSP ACh event
Model of a nicotinic Excitatory Post-Synaptic Potential in a Torpedo electric organ. Acetylcholine is not represented explicitely, but by an event that changes the constants of transition from unliganded to liganded.\u00a0
This model has initially been encoded using StochSim.
Edelstein SJ, Schaad O, Henry E, Bertrand D, Changeux JP.
Biol Cybern 1996 Nov; 75(5): 361-379
Abstract:
Nicotinic acetylcholine receptors are transmembrane oligomeric proteins that mediate interconversions between open and closed channel states under the control of neurotransmitters. Fast in vitro chemical kinetics and in vivo electrophysiological recordings are consistent with the following multi-step scheme. Upon binding of agonists, receptor molecules in the closed but activatable resting state (the Basal state, B) undergo rapid transitions to states of higher affinities with either open channels (the Active state, A) or closed channels (the initial Inactivatable and fully Desensitized states, I and D). In order to represent the functional properties of such receptors, we have developed a kinetic model that links conformational interconversion rates to agonist binding and extends the general principles of the Monod-Wyman-Changeux model of allosteric transitions. The crucial assumption is that the linkage is controlled by the position of the interconversion transition states on a hypothetical linear reaction coordinate. Application of the model to the peripheral nicotine acetylcholine receptor (nAChR) accounts for the main properties of ligand-gating, including single-channel events, and several new relationships are predicted. Kinetic simulations reveal errors inherent in using the dose-response analysis, but justify its application under defined conditions. The model predicts that (in order to overcome the intrinsic stability of the B state and to produce the appropriate cooperativity) channel activation is driven by an A state with a Kd in the 50 nM range, hence some 140-fold stronger than the apparent affinity of the open state deduced previously. According to the model, recovery from the desensitized states may occur via rapid transit through the A state with minimal channel opening, thus without necessarily undergoing a distinct recovery pathway, as assumed in the standard 'cycle' model. Transitions to the desensitized states by low concentration 'pre-pulses' are predicted to occur without significant channel opening, but equilibrium values of IC50 can be obtained only with long pre-pulse times. Predictions are also made concerning allosteric effectors and their possible role in coincidence detection. In terms of future developments, the analysis presented here provides a physical basis for constructing more biologically realistic models of synaptic modulation that may be applied to artificial neural networks.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
Edelstein SJ, Schaad O, Henry E, Bertrand D, Changeux JP.
Biol. Cybern. 1996 Nov; 75(5):361-79
Abstract:
Nicotinic acetylcholine receptors are transmembrane oligomeric proteins that mediate interconversions between open and closed channel states under the control of neurotransmitters. Fast in vitro chemical kinetics and in vivo electrophysiological recordings are consistent with the following multi-step scheme. Upon binding of agonists, receptor molecules in the closed but activatable resting state (the Basal state, B) undergo rapid transitions to states of higher affinities with either open channels (the Active state, A) or closed channels (the initial Inactivatable and fully Desensitized states, I and D). In order to represent the functional properties of such receptors, we have developed a kinetic model that links conformational interconversion rates to agonist binding and extends the general principles of the Monod-Wyman-Changeux model of allosteric transitions. The crucial assumption is that the linkage is controlled by the position of the interconversion transition states on a hypothetical linear reaction coordinate. Application of the model to the peripheral nicotine acetylcholine receptor (nAChR) accounts for the main properties of ligand-gating, including single-channel events, and several new relationships are predicted. Kinetic simulations reveal errors inherent in using the dose-response analysis, but justify its application under defined conditions. The model predicts that (in order to overcome the intrinsic stability of the B state and to produce the appropriate cooperativity) channel activation is driven by an A state with a Kd in the 50 nM range, hence some 140-fold stronger than the apparent affinity of the open state deduced previously. According to the model, recovery from the desensitized states may occur via rapid transit through the A state with minimal channel opening, thus without necessarily undergoing a distinct recovery pathway, as assumed in the standard 'cycle' model. Transitions to the desensitized states by low concentration 'pre-pulses' are predicted to occur without significant channel opening, but equilibrium values of IC50 can be obtained only with long pre-pulse times. Predictions are also made concerning allosteric effectors and their possible role in coincidence detection. In terms of future developments, the analysis presented here provides a physical basis for constructing more biologically realistic models of synaptic modulation that may be applied to artificial neural networks.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
This model describes a basic 3-\t\t\t\t\t\t\tstage Mitogen Activated Protein Kinase (MAPK)\t\t\t\t\t\t\t cascade in solution. This cascade is typically expressed as RAF=\t\t\t\t\t\t\t=>MEK==>MAPK (alternative forms are K3==>K2==>\t\t\t\t\t\t\tK1 and KKK==>KK==>K)\t\t\t\t\t\t\t. The input signal is RAFK (RAF Kinase)\t\t\t\t\t\t\t and the output signal is MAPKpp (\t\t\t\t\t\t\tdoubly phosphorylated form of MAPK)\t\t\t\t\t\t\t. RAFK phosphorylates RAF once to RAFp. RAFp,\t\t\t\t\t\t\t the phosphorylated form of RAF induces two phoshporylations of MEK,\t\t\t\t\t\t\tto MEKp and MEKpp. MEKpp,\t\t\t\t\t\t\t the doubly phosphorylated form of MEK,\t\t\t\t\t\t\t induces two phosphorylations of MAPK to MAPKp and MAPKpp.
Generated by Cellerator Version 1.4.3 (6-March-2004) using Mathematica 5.0 \t\t\t\tfor Mac OS X (November 19, 2003), March 6, 2004 12:18:07, using (PowerMac,\t\t\t\tPowerPC,Mac OS X,MacOSX,Darwin)
This model describes the deterministic version of the repressilator system.
The authors of this model (see reference) use three transcriptional repressor systems that are not part of any natural biological clock to build an oscillating network that they called the repressilator. The model system was induced in Escherichia coli.
In this system, LacI (variable X is the mRNA, variable PX is the protein) inhibits the tetracycline-resistance transposon tetR (Y, PY describe mRNA and protein). Protein tetR inhibits the gene Cl from phage Lambda (Z, PZ: mRNA, protein),and protein Cl inhibits lacI expression. With the appropriate parameter values this system oscillates.
Networks of interacting biomolecules carry out many essential functions in living cells, but the 'design principles' underlying the functioning of such intracellular networks remain poorly understood, despite intensive efforts including quantitative analysis of relatively simple systems. Here we present a complementary approach to this problem: the design and construction of a synthetic network to implement a particular function. We used three transcriptional repressor systems that are not part of any natural biological clock to build an oscillating network, termed the repressilator, in Escherichia coli. The network periodically induces the synthesis of green fluorescent protein as a readout of its state in individual cells. The resulting oscillations, with typical periods of hours, are slower than the cell-division cycle, so the state of the oscillator has to be transmitted from generation to generation. This artificial clock displays noisy behaviour, possibly because of stochastic fluctuations of its components. Such 'rational network design may lead both to the engineering of new cellular behaviours and to an improved understanding of naturally occurring networks.
The model is based upon the equations in Box 1 of the paper; however, these equations as printed are dimensionless, and the correct dimensions have been returned to the equations, and the parameters set to reproduce Figure 1C (left).
The original model was generated by B.E. Shapiro using Cellerator version 1.0 update 2.1127 using Mathematica 4.2 for Mac OS X (June 4, 2002), November 27, 2002 12:15:32, using (PowerMac,PowerPC, Mac OS X,MacOSX,Darwin).
Nicolas Le Novere provided a corrected version generated by SBMLeditor on Sun Aug 20 00:44:05 BST 2006. This removed the EmptySet species. Ran fine on COPASI 4.0 build 18.
Bruce Shapiro revised the model with SBMLeditor on 23 October 2006 20:39 PST. This defines default units and correct reactions. The original Cellerator reactions while being mathematically correct did not accurately reflect the intent of the authors. The original notes were mostly removed because they were mostly incorrect in the revised version. Tested with MathSBML 2.6.0.
Nicolas Le Novere changed the volume to 1 cubic micrometre, to allow for stochastic simulation.
Changed by Lukas Endler to use the average livetime of mRNA instead of its halflife and a corrected value of alpha and alpha0.
Moreover, the equations used in this model were clarified, cf. below.
The equations given in box 1 of the original publication are rescaled in three respects (lowercase letters denote the rescaled, uppercase letters the unscaled number of molecules per cell):
the time is rescaled to the average mRNA lifetime, t_ave: \u03c4 = t/t_ave
the mRNA concentration is rescaled to the translation efficiency eff: m = M/eff
the protein concentration is rescaled to Km: p = P/Km
\u03b1 in the equations should be in units of rescaled proteins per promotor and cell, and \u03b2 is the ratio of the protein to the mRNA decay rates or the ratio of the mRNA to the protein halflife.
In this version of the model \u03b1 and \u03b2 are calculated correspondingly to the article, while p and m where just replaced by P/Km resp. M/eff and all equations multiplied by 1/t_ave . Also, to make the equations easier to read, commonly used variables derived from the parameters given in the article by simple rules were introduced.
The parameters given in the article were:
promotor strength (repressed) ( tps_repr ):
5*10 -4
transcripts/(promotor*s)
promotor strength (full) ( tps_active ):
0.5
transcripts/(promotor*s)
mRNA half life, \u03c4 1/2,mRNA :
2
min
protein half life, \u03c4 1/2,prot :
10
min
K M :
40
monomers/cell
Hill coefficient n:
2
From these the following constants can be derived:
average mRNA lifetime ( t_ave ):
\u03c4 1/2,mRNA /ln(2)
= 2.89 min
mRNA decay rate ( kd_mRNA ):
ln(2)/ \u03c4 1/2,mRNA
= 0.347 min -1
protein decay rate ( kd_prot ):
ln(2)/ \u03c4 1/2,prot
transcription rate ( a_tr ):
tps_active*60
= 29.97 transcripts/min
transcription rate (repressed) ( a0_tr ):
tps_repr*60
= 0.03 transcripts/min
translation rate ( k_tl ):
eff*kd_mRNA
= 6.93 proteins/(mRNA*min)
\u03b1 :
a_tr*eff*\u03c4 1/2,prot /(ln(2)*K M )
= 216.4 proteins/(promotor*cell*Km)
\u03b1 0 :
a0_tr*eff*\u03c4 1/2,prot /(ln(2)*K M )
= 0.2164 proteins/(promotor*cell*Km)
\u03b2 :
k_dp/k_dm
= 0.2
Annotation by the Kinetic Simulation Algorithm Ontology (KiSAO):
To reproduce the simulations run published by the authors, the model has to be simulated with any of two different approaches. First, one could use a deterministic method ( KISAO_0000035 ) with continuous variables ( KISAO_0000018 ). One sample algorithm to use is the CVODE solver ( KISAO_0000019 ). Second, one could simulate the system using Gillespie's direct method ( KISAO_0000029 ), which is a stochastic method ( KISAO_0000036 ) supporting adaptive timesteps ( KISAO_0000041 ) and using discrete variables ( KISAO_0000016 ).
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
This a model from the article: Applications of metabolic modelling to plant metabolism. \t Poolman MG ,Assmus HE, Fell DA J. Exp. Bot.[2004 May; Volume: 55 (Issue: 400 )]: 1177-86 15073223, Abstract: In this paper some of the general concepts underpinning the computer modelling of metabolic systems are introduced. The difference between kinetic and structural modelling is emphasized, and the more important techniques from both, along with the physiological implications, are described. These approaches are then illustrated by descriptions of other work, in which they have been applied to models of the Calvin cycle, sucrose metabolism in sugar cane, and starch metabolism in potatoes.
This model describes the non oxidative Calvin cycle as depicted in Poolman et al; J Exp Bot (2004) 55:1177-1186, fig 2. Reaction E20: E4P + F6P \u2194 S7P + GAP, is depicted in the figure, but not included in the model. The light reaction: ADP + P i \u2192 ATP, is included in the model, but only mentioned in the figure caption. The parameters and initial concentrations are the same as in Poolman, 1999, Computer Modelling Applied to the Calvin Cycle, PhD Thesis, Oxford Brookes University, Appendix A (available at at http://mudshark.brookes.ac.uk/index.php/Publications/Theses/Mark)
\u00a9 Mark Poolman (mgpoolman@brookes.ac.uk) 1995-2002 Based on a description by Pettersson 1988, Eur. J. Biochem. 175, 661-672 Differences are: 1 - Reactions assumed by Pettersson to be in equilibrium have fast mass action kinetics. 2 - Introduction of the parameter PGAxpMult to modulate PGA export through TPT. 3 - Introduction of Starch phosphorylase reaction. This file may be freely copied or translated into other formats provided: 1 - This notice is reproduced in its entirety 2 - Published material making use of (information gained from) this model cites at least: (a) Poolman, 1999, Computer Modelling Applied to the Calvin Cycle, PhD Thesis, Oxford Brookes University (b) Poolman, Fell, and Thomas. 2000, Modelling Photosynthesis and its control, J. Exp. Bot. 51, 319-328 or (c) Poolman et al. 2001, Computer modelling and experimental evidence for two steady states in the photosynthetic Calvin cycle. Eur. J. Biochem. 268, 2810-2816 Further related information may be found at http://mudshark.brookes.ac.uk.
Levchenko, A., Bruck, J., Sternberg, P.W. (2000)\t\t\t\t\t\t\t.Scaffold proteins may biphasically affect the levels of mitogen-activated protein kinase signaling and reduce its threshold properties. Proc. Natl. Acad. Sci. USA 97(11):5818-5823.\t\t\t\t\t\t\t\t\t\t\t\t\thttp://www.pnas.org/cgi/content/abstract/97/11/5818\t\t\t\t\t\t
\t\t\t\t\t
\t\t\t\t\t\t\t
\t\t\t\t\t\t
\t\t\t\t\t\t\t\t\t
\t\t\t\t\t\t
Description
\t\t\t\t\t
\t\t\t\t\t\t\t\t\t\t\t\t\t
\t\t\t\t\t\t
This model describes a basic 3-stage Mitogen Activated Protein Kinase (MAPK). Kinases in solution are written as K[3,J], K[2,J], K[1,J] for MAPKKK, MAPKK, and MAPK, respectively, J indicates the phosphorylation level, J=0,1 for K3 and J=0,1,2 for K2 and K1. Scaffolds have three slots, for MAPK, MAPKK, and MAPKKK, respectively. Bound and free scaffold are denoted as S[i,j,k], where i, j, and k indicate the binding of K[1,i], K[2,j] and K[3,k] in their respective slots. Here i,j=-1,0,1,or,2 and k=-1,0,or,1. A value of -1 means the slot is empty, 0 means the unphorphorylated kinase is bound, 1 means the singly phosphorylated kinase is bound, and 2 means the doubly phosphorylated kinase is bound. Thus S[1,-1,2] is a scaffold with K[3,1] bound in the first slot and K[1,2] in the third slot, while the second slot is empty.Note: Indices X[I,J,K] are translated into the unindexed variable X_I_J_K and so forth in the SBML. Negative indices are translated as mI, etc, thus S[1,-1,2] becomes S_1_m1_2.
Generated by Cellerator Version 1.0 update 2.1203 using Mathematica 4.2 for \t\t\t\tMac OS X (June 4, 2002), December 4, 2002 15:06:10, using (PowerMac,PowerPC,Mac \t\t\t\tOS X,MacOSX,Darwin)
Experimental and clinical data on purine metabolism are collated and analyzed with three mathematical models. The first model is the result of an attempt to construct a traditional kinetic model based on Michaelis-Menten rate laws. This attempt is only partially successful, since kinetic information, while extensive, is not complete, and since qualitative information is difficult to incorporate into this type of model. The data gaps necessitate the complementation of the Michaelis-Menten model with other functional forms that can incorporate different types of data. The most convenient and established representations for this purpose are rate laws formulated as power-law functions, and these are used to construct a Complemented Michaelis-Menten (CMM) model. The other two models are pure power-law-representations, one in the form of a Generalized Mass Action (GMA) system, and the other one in the form of an S-system. The first part of the paper contains a compendium of experimental data necessary for any model of purine metabolism. This is followed by the formulation of the three models and a comparative analysis. For physiological and moderately pathological perturbations in metabolites or enzymes, the results of the three models are very similar and consistent with clinical findings. This is an encouraging result since the three models have different structures and data requirements and are based on different mathematical assumptions. Significant enzyme deficiencies are not so well modeled by the S-system model. The CMM model captures the dynamics better, but judging by comparisons with clinical observations, the best model in this case is the GMA model. The model results are discussed in some detail, along with advantages and disadvantages of each modeling strategy.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
In summary, you are entitled to use this encoded model in absolutely any manner you deem suitable, verbatim, or with modification, alone or embedded it in a larger context, redistribute it, commercially or not, in a restricted way or not.
This a model from the article: Metabolic engineering of lactic acid bacteria, the combined approach: kinetic modelling, metabolic control and experimental analysis. Hoefnagel MH, Starrenburg MJ, Martens DE, Hugenholtz J, Kleerebezem M, Van Swam II, Bongers R, Westerhoff HV, Snoep JL Microbiology2002 Apr; 148(4):1003-13 11932446, Abstract: Everyone who has ever tried to radically change metabolic fluxes knows that it is often harder to determine which enzymes have to be modified than it is to actually implement these changes. In the more traditional genetic engineering approaches \u2019bottle-necks\u2019 are pinpointed using qualitative, intuitive approaches, but the alleviation of suspected \u2019rate-limiting\u2019 steps has not often been successful. Here the authors demonstrate that a model of pyruvate distribution in Lactococcus lactis based on enzyme kinetics in combination with metabolic control analysis clearly indicates the key control points in the flux to acetoin and diacetyl, important flavour compounds. The model presented here (available at http://jjj.biochem.sun.ac.za/wcfs.html) showed that the enzymes with the greatest effect on this flux resided outside the acetolactate synthase branch itself. Experiments confirmed the predictions of the model, i.e. knocking out lactate dehydrogenase and overexpressing NADH oxidase increased the flux through the acetolactate synthase branch from 0 to 75% of measured product formation rates.
The paper does not have any figure to be put as a curation figure in the BioModels database. The model does reproduce the fluxes and control-coefficients given in Figure 2 and Table 4. To reproduce the results, the model was changed from the description in the article according to the model on JWS: the parameter Kmpyr was changed to 2.5 from 25. The equillibrium constant for PTA reaction (R4) was changed from 0.0281 to 0.0065. The Km for oxygen in the NOX reaction (R13) was changed from 0.01 to 0.2. Slight deviations between the values in the article and the model results may stem from different algorithms used for finding the steady state.
A mathematical description of polyglutamated folate kinetics for human breast carcinoma cells (MCF-7) has been formulated based upon experimental folate, methotrexate (MTX), purine, and pyrimidine pool sizes as well as reaction rate parameters obtained from intact MCF-7 cells and their enzyme isolates. The schema accounts for the interconversion of highly polyglutamated tetrahydrofolate, 5-methyl-FH4, 5-10-CH2FH4, dihydrofolate (FH2), 10-formyl-FH4 (FFH4), and 10-formyl-FH2 (FFH2), as well as formation and transport of the MTX polyglutamates. Inhibition mechanisms have been chosen to reproduce all observed non-, un-, and pure competition inhibition patterns. Steady state folate concentrations and thymidylate and purine synthesis rates in drug-free intact cells were used to determine normal folate Vmax values. The resulting average-cell folate model, examined for its ability to predict folate pool behavior following exposure to 1 microM MTX over 21 h, agreed well with the experiment, including a relative preservation of the FFH4 and CH2FH4 pools. The results depend strongly on thymidylate synthase (TS) reaction mechanism, especially the assumption that MTX di- and triglutamates inhibit TS synthesis as greatly in the intact cell as they do with purified enzyme. The effects of cell cycle dependence of TS and dihydrofolate reductase activities were also examined by introducing G- to S-phase activity ratios of these enzymes into the model. For activity ratios down to at least 5%, cell population averaged folate pools were only slightly affected, while CH2FH4 pools in S-phase cells were reduced to as little as 10% of control values. Significantly, these folate pool dynamics were indicated to arise from both direct inhibition by MTX polyglutamates as well as inhibition by elevated levels of polyglutamated FH2 and FFH2.
Note: two flow BCs were converted into two downstream concentration BCs, thus removing the GAR and dUMP state variables. This dropped the number of ODEs from 21 to 19.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
Computational model that offers an integrated quantitative, dynamic, and topological representation of intracellular signal networks, based on known components of epidermal growth factor (EGF) receptor signal pathways.
\t
\t
\t
The initial model was constructed by Ken Lau from the MATLAB source code.
Schoeberl B, Eichler-Jonsson C, Gilles ED, M\u00fcller G
\t
Nat. Biotechnol. 2002 Apr; 20(4): 370-375
\t
Abstract:
\t
\t
We present a computational model that offers an integrated quantitative, dynamic, and topological representation of intracellular signal networks, based on known components of epidermal growth factor (EGF) receptor signal pathways. The model provides insight into signal-response relationships between the binding of EGF to its receptor at the cell surface and the activation of downstream proteins in the signaling cascade. It shows that EGF-induced responses are remarkably stable over a 100-fold range of ligand concentration and that the critical parameter in determining signal efficacy is the initial velocity of receptor activation. The predictions of the model agree well with experimental analysis of the effect of EGF on two downstream responses, phosphorylation of ERK-1/2 and expression of the target gene, c-fos.
\t
\t
\t
\t
This model does not exactly reproduce the results given in the original publication. It has, though, the same reaction graph and gives very similar time courses for the conditions depicted in the article.
\t
\t
Several corrections were applied to the parameters described in the paper's supplementary materials. Some parameter names were replaced by the corresponding identical ones: k(r)26 by k(r)18, k(r)27 by k(r)19, k(r)30 by k(r)20, k(r)38 by k(r)24, k(r)39 by k(r)37, k(r)46 by k(r)44, k51 by k49, k(r)54 by k(r)52 and k62 by k62. In particular the parameter values described in the column \"remark\" of supplementary table 1 override the values explicitely written in the numerical columns:
name
in suppl. value used
in model value used
remarks
kr16
0.055
0.275
k30
7.9e6
2.1e6
as k20
kr30
0.3
0.4
as kr24
k38
3e7
1e7
as k20
kr38
0.055
0.55
as kr24
k52
1.1e5
5.34e7
k5 was used for v116, v119, v122 and v125 in addition of v107, v110 and v113 as listed in the legend of supplementary figure 2. k5 is calculated using th eformula from the matlab file not given in the supplements.
All rate constants were rescaled to minutes (k[min] = 60*k[sec]) and all second order rate constants additionally to molecules/cell with a cell volume of 1 picolitre (k[molecs/cell] = k[M]/(Vc*Na), with Vc=1e-12 l and Na = 6e23).
The association constant of internalized EGF was rescaled to molecules/endosome using an endosomal volume of 4.3 al (= 4.3*10 -18 litre).
The extracellular EGF concentration was converted to molecules per picolitre with a MW of 6045 Da.
[ng/ml]
[numb/pl]
50
4962
0.5
49.6
0.125
12.4
With the initial conditions given in the paper, the results could not be reproduced at all. Therefore the initial conditions used in the MATLAB file were adopted for SHC (1.01 * 10 5 instead of 1.01 * 10 6 ) and Ras_GDP. (7.2 * 10 4 instead of 1.14 * 10 7 )
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
This is an implementation of the Hodgkin-Huxley model of the electrical behavior of the squid axon membrane from: A quantitative description of membrane current and its application to conduction and excitation in nerve. A. L. Hodgkin and A. F. Huxley. (1952 ) Journal of Physiology 119(4): pp 500-544; pmID: 12991237 .
Abstract: This article concludes a series of papers concerned with the flow of electric current through the surface membrane of a giant nerve fibre (Hodgkin,Huxley & Katz, 1952; Hodgkin & Huxley, 1952 a-c). Its general object is to discuss the results of the preceding papers (Part I), to put them into mathematical form (Part II) and to show that they will account for conduction and excitation in quantitative terms (Part III).
This SBML model uses the same formalism as the one described in the paper, contrary to modern versions: * V describes the the membrane depolarisation relative to the resting potential of the membrane * opposing to modern practice, depolarization is negative , not positive , so the sign of V is different * inward transmembrane currents are considered positive (inward current positive), contrary to modern use The changeable parameters are the equilibrium potentials( E_R, E_K, E_L, E_Na ), the membrane depolarization ( V ) and the initial sodium and potassium channel activation and inactivation coefficients ( m,h,n ). The initial values of m,h,n for the model were calculated for V = 0 using the equations from the article: n t=0 = \u03b1_n V=0 /(\u03b1_n V=0 + \u03b2_n V=0 ) and equivalent expressions for h and m . For single excitations apply a negative membrane depolarization (V < 0). To achieve oscillatory behavior either change the resting potential to a more positive value or apply a constant negative ionic current (I < 0). Two assignments for parameters in the model, alpha_n and alpha_m, are not defined at V=-10 resp. -25 mV. We did not change this to keep the formulas similar to the original publication and as most integrators seem not to have any problem with it. The limits at V=-10 and -25 mV are 0.1 for alpha_n resp. 1 for alpha_m. We thank Mark W. Johnson for finding a bug in the model and his helpful comments.
Bruce Shapiro: Generated by Cellerator Version 1.0 update 3.0303 using Mathematica 4.1 for Microsoft Windows (June 13, 2001), April 2, 2003 16:49:13, using (PC,x86, Microsoft Windows,WindowsNT,Windows)
Bruce Shapiro: Corrected 29 March 2005
Nicolas Le Nov\u00e8re: Added Dbt and Cyc species, and the corresponding reactions. 23 April 2005
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
In summary, you are entitled to use this encoded model in absolutely any manner you deem suitable, verbatim, or with modification, alone or embedded it in a larger context, redistribute it, commercially or not, in a restricted way or not.
This model originates from BioModels Database: A Database of Annotated Published Models. It is copyright (c) 2005-2010 The BioModels Team. For more information see the terms of use .
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
In summary, you are entitled to use this encoded model in absolutely any manner you deem suitable, verbatim, or with modification, alone or embedded it in a larger context, redistribute it, commercially or not, in a restricted way or not.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
In summary, you are entitled to use this encoded model in absolutely any manner you deem suitable, verbatim, or with modification, alone or embedded it in a larger context, redistribute it, commercially or not, in a restricted way or not.
The model corresponds to the schemas 1 and 2 of Markevich et al 2004, as described in the figure 1 and the supplementary table S1. Phosphorylations and dephosphorylations follow distributive ordered kinetics. The phosphorylations are modeled with three elementary reactions: E+S<=>ES->E+P The dephosphorylations are modeled with five elementary reactions: E+S<=>ES->EP<=>E+P
The model corresponds to the schemas 1and 2 of Markevich et al 2004, as described in the figure 1 andmodelled using Michaelis-Menten like kinetics. Phosphorylations anddephosphorylations follow distributive ordered kinetics. Itreproduces figure 3 of the main article.
Mitogen-activated protein kinase (MAPK) cascades can operate as bistable switches residing in either of two different stable states. MAPK cascades are often embedded in positive feedback loops, which are considered to be a prerequisite for bistable behavior. Here we demonstrate that in the absence of any imposed feedback regulation, bistability and hysteresis can arise solely from a distributive kinetic mechanism of the two-site MAPK phosphorylation and dephosphorylation. Importantly, the reported kinetic properties of the kinase (MEK) and phosphatase (MKP3) of extracellular signal-regulated kinase (ERK) fulfill the essential requirements for generating a bistable switch at a single MAPK cascade level. Likewise, a cycle where multisite phosphorylations are performed by different kinases, but dephosphorylation reactions are catalyzed by the same phosphatase, can also exhibit bistability and hysteresis. Hence, bistability induced by multisite covalent modification may be a widespread mechanism of the control of protein activity.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
The model corresponds to the schema 3 of Markevich et al 2004, as described in the figure 2 and the supplementary table S2. Phosphorylations follow distributive random kinetics, while dephosphorylations follow an ordered mechanism. The phosphorylations are modeled with three elementary reactions: E+S<=>ES->E+P The dephosphorylations are modeled with five elementary reactions: E+S<=>ES->EP<=>E+P The model reproduces figure 5 in the main article.
The model is further described in: Signaling switches and bistability arising from multisite phosphorylation in protein kinase cascades. Markevich NI, Hoek JB, Kholodenko BN. J Cell Biol. 2004 Feb 2;164(3):353-9. PMID: 14744999 ; DOI: 10.1083/jcb.200308060 Abstract: Mitogen-activated protein kinase (MAPK) cascades can operate as bistable switches residing in either of two different stable states. MAPK cascades are often embedded in positive feedback loops, which are considered to be a prerequisite for bistable behavior. Here we demonstrate that in the absence of any imposed feedback regulation, bistability and hysteresis can arise solely from a distributive kinetic mechanism of the two-site MAPK phosphorylation and dephosphorylation. Importantly, the reported kinetic properties of the kinase (MEK) and phosphatase (MKP3) of extracellular signal-regulated kinase (ERK) fulfill the essential requirements for generating a bistable switch at a single MAPK cascade level. Likewise, a cycle where multisite phosphorylations are performed by different kinases, but dephosphorylation reactions are catalyzed by the same phosphatase, can also exhibit bistability and hysteresis. Hence, bistability induced by multisite covalent modification may be a widespread mechanism of the control of protein activity.
The model corresponds to the schema 3 of Markevich et al 2004, as described in the figure 2 and the supplementary table S3, and modelled using Michaelis-Menten like kinetics. Phosphorylations follow distributive random kinetics, while dephosphorylations follow an ordered mechanism.
This model originates from BioModels Database: A Database of Annotated Published Models. It is copyright (c) 2005-2007 The BioModels Team. For more information see the terms of use .
The model describes the double phosphorylation of MAP kinase by an ordered mechanism using the Michaelis-Menten formalism. Two different enzymes, MAPKK1 and MAPKK2, successively phosphorylate the MAP kinase, but one and the same phosphatase dephosphorylates both sites. The model reproduces figure S9 in the supplemental material of the article.
The model is further described in: Signaling switches and bistability arising from multisite phosphorylation in protein kinase cascades. Markevich NI, Hoek JB, Kholodenko BN. J Cell Biol. 2004 Feb 2;164(3):353-9. PMID: 14744999 ; DOI: 10.1083/jcb.200308060 Abstract: Mitogen-activated protein kinase (MAPK) cascades can operate as bistable switches residing in either of two different stable states. MAPK cascades are often embedded in positive feedback loops, which are considered to be a prerequisite for bistable behavior. Here we demonstrate that in the absence of any imposed feedback regulation, bistability and hysteresis can arise solely from a distributive kinetic mechanism of the two-site MAPK phosphorylation and dephosphorylation. Importantly, the reported kinetic properties of the kinase (MEK) and phosphatase (MKP3) of extracellular signal-regulated kinase (ERK) fulfill the essential requirements for generating a bistable switch at a single MAPK cascade level. Likewise, a cycle where multisite phosphorylations are performed by different kinases, but dephosphorylation reactions are catalyzed by the same phosphatase, can also exhibit bistability and hysteresis. Hence, bistability induced by multisite covalent modification may be a widespread mechanism of the control of protein activity.
This a model from the article: Modelling the dynamics of the yeast pheromone pathway. Kofahl B, Klipp E Yeast[2004 Jul; Volume: 21 (Issue: 10 )] Page info: 831-50 15300679, Abstract: We present a mathematical model of the dynamics of the pheromone pathways in haploid yeast cells of mating type MATa after stimulation with pheromone alpha-factor. The model consists of a set of differential equations and describes the dynamics of signal transduction from the receptor via several steps, including a G protein and a scaffold MAP kinase cascade, up to changes in the gene expression after pheromone stimulation in terms of biochemical changes (complex formations, phosphorylations, etc.). The parameters entering the models have been taken from the literature or adapted to observed time courses or behaviour. Using this model we can follow the time course of the various complex formation processes and of the phosphorylation states of the proteins involved. Furthermore, we can explain the phenotype of more than a dozen well-characterized mutants and also the graded response of yeast cells to varying concentrations of the stimulating pheromone.
The model was updated on 21st October 2010, by Vijayalakshmi Chelliah. The following changes were made: 1) The model has been converted to SBML l2v4.2) The model has been recurated and the curation figure was updated (units are in nanoMolar; but the publication has units in microMolar). Simulations were done using Copasi v4.6 (Build 32).3) Notes have been added.4) Annotation for one of the species has been corrected (Complex M).
The following are the four major differences between the original publication by Kofahl et al and the model that actually is able to replicate the results as depicted in the publication (those corrections have been made in agreement with the authors): 1. Bar1 is the inactive protease present inside the cell but the publication wrongly mentions that Bar1 is also the protease that is present on the extracellular surface. The model correctly names the protease in it's different forms by calling inactive Bar1 within the cell as Bar1, active Bar1 within the cell as Bar1a and extracellular Bar1 as Bar1aex 2. The initial amount of Alpha-factor is given as 1000nM but the model uses a value of 100nM. 3. The value of the paramenter k8 is given as 0.33 but the model uses a value of 0.033. 4. The value of the paramenter k41 is given as 0.002 but the model uses a value of 0.02.
Brown KS, Hill CC, Calero GA, Myers CR, Lee KH, Sethna JP, Cerione RA.
Phys Biol 2004 Dec; 1(3-4): 184-195
Abstract:
The inherent complexity of cellular signaling networks and their importance to a wide range of cellular functions necessitates the development of modeling methods that can be applied toward making predictions and highlighting the appropriate experiments to test our understanding of how these systems are designed and function. We use methods of statistical mechanics to extract useful predictions for complex cellular signaling networks. A key difficulty with signaling models is that, while significant effort is being made to experimentally measure the rate constants for individual steps in these networks, many of the parameters required to describe their behavior remain unknown or at best represent estimates. To establish the usefulness of our approach, we have applied our methods toward modeling the nerve growth factor (NGF)-induced differentiation of neuronal cells. In particular, we study the actions of NGF and mitogenic epidermal growth factor (EGF) in rat pheochromocytoma (PC12) cells. Through a network of intermediate signaling proteins, each of these growth factors stimulates extracellular regulated kinase (Erk) phosphorylation with distinct dynamical profiles. Using our modeling approach, we are able to predict the influence of specific signaling modules in determining the integrated cellular response to the two growth factors. Our methods also raise some interesting insights into the design and possible evolution of cellular systems, highlighting an inherent property of these systems that we call 'sloppiness.'
The figures in the paper show results from computationsperformed over an ensemble of all parameter sets that fit theavailable data. This file contains only the best fit parameters.The full ensemble of parameters is available athttp://www.lassp.cornell.edu/sethna/GeneDynamics/PC12DataFiles/(Also, the best-fit parameter set produces a curve for DN Rap1 thatis less \"peakish\" than the ensemble average.)
The conversion factors for EGF and NGF concentrations accountfor their molecular weights and the density of cells in the culturedish. These concentrations are saturating, so the exact values arenot critical.
Because the Erk data fit to measure only fold changes inactivity, there is no absolute scale for the y-axes. Thus thecurves from this file have different magnitudes than thosepublished.
To reproduce the figures from the paper: 2a) For EGF stimulation, set the initial concentration of EGFto 100 ng/ml * 100020 (molecule/cell)/(ng/ml) = 10002000. For NGF stimulation, set the initial concentration of NGF to50 ng/ml * 4560 (molecule/cell)/(ng/ml) = 456000 5a) To simulate LY294002 addition, set kPI3KRas and kPI3K to0. 5b) To simulate a dominant negative Rap1, set kRap1ToBRaf to0. To simulate a dominant negative Ras, set kRasToRaf1 andkPI3KRas to 0.
Almost all the data fit with this model by the authors arefrom Western blots. Given the uncertainties in antibodyeffectiveness and other factors, one can't a priori derive aconversion between the arbitrary units for a given set of data andmolecules per cell. So the authors used an adjustable \"scalefactor\" that converts between molecules per cell and Western blotunits.
For the EGF stimulation data in figure 2a) the scale factorconversion is 1.414e-05 (U/mg)/(molecule/cell). For the NGFstimulation data in figure 2a) it is 7.135e-06(U/mg)/(molecule/cell).
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No inititial conditions are specified in the paper. Because there is a basal rate of transcription for each gene, it doesn't matter much. With the agreement of Paul Smolen, I put all the initial concentration at 0.001 nanomoles. N Le Nov\u00e8re.
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A minimal model of genomically based oscillation,\t\t\t\t\t\t\t based on two mutually interacting genes,\t\t\t\t\t\t\t an activator and a repressor. Postive feedback is provided by the activator protein,\t\t\t\t\t\t\t which binds to the promotors of both the activator and the repressor genes. Negative feedback is provided by the repressor protein which binds to the activator protein.
Generated by Cellerator Version 1.0 update 2.1127 using Mathematica 4.2 for \t\t\t\tMac OS X (June 4, 2002), November 27, 2002 12:17:46, using (PowerMac,PowerPC,\t\t\t\tMac OS X,MacOSX,Darwin)
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
In summary, you are entitled to use this encoded model in absolutely any manner you deem suitable, verbatim, or with modification, alone or embedded it in a larger context, redistribute it, commercially or not, in a restricted way or not.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
In summary, you are entitled to use this encoded model in absolutely any manner you deem suitable, verbatim, or with modification, alone or embedded it in a larger context, redistribute it, commercially or not, in a restricted way or not.
In order to reproduce the model, the volume of all compartment is set to 1, and the stoichiometry of CaER and CaM has been set to 0.25, corresponding to betaER/rhoER and betaM/rhoM described in the paper.
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R.J.Field and R.M.Noyes,J.Chem.Phys.60,1877 (1974)
Description
Field Noyes Version of Belousov-Zhabotinsky Reaction. BrO3 is held constant; HOBr is typically ignored,\t\t\t\t\t\t\t and can be replaced by an empty-set. The stoichiometry f is typically taken as 1/2 or 1.\t\t\t\t\t\t\t.
Initially Generated by Cellerator Version 1.0 update 2.1220 using Mathematica 4.2 for \t\t\t\tMac OS X (June 4, 2002), December 26, 2002 10:43:53, using (PowerMac,PowerPC,\t\t\t\tMac OS X,MacOSX,Darwin). author=B.E.Shapiro
Modified with SBMLeditor by Nicolas Le Nov\u00e8re, to fit the original article.
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There has been much debate on the mechanism of regulation of mitochondrial ATP synthesis to balance ATP consumption during changing cardiac workloads. A key role of creatine kinase (CK) isoenzymes in this regulation of oxidative phosphorylation and in intracellular energy transport had been proposed, but has in the mean time been disputed for many years. It was hypothesized that high-energy phosphorylgroups are obligatorily transferred via CK; this is termed the phosphocreatine shuttle. The other important role ascribed to the CK system is its ability to buffer ADP concentration in cytosol near sites of ATP hydrolysis.
Almost all of the experiments to determine the role of CK had been done in the steady state, but recently the dynamic response of oxidative phosphorylation to quick changes in cytosolic ATP hydrolysis has been assessed at various levels of inhibition of CK. Steady state models of CK function in energy transfer existed but were unable to explain the dynamic response with CK inhibited.
The aim of this study was to explain the mode of functioning of the CK system in heart, and in particular the role of different CK isoenzymes in the dynamic response to workload steps. For this purpose we used a mathematical model of cardiac muscle cell energy metabolism containing the kinetics of the key processes of energy production, consumption and transfer pathways. The model underscores that CK plays indeed a dual role in the cardiac cells. The buffering role of CK system is due to the activity of myofibrillar CK (MMCK) while the energy transfer role depends on the activity of mitochondrial CK (MiCK). We propose that this may lead to the differences in regulation mechanisms and energy transfer modes in species with relatively low MiCK activity such as rabbit in comparison with species with high MiCK activity such as rat.
The model needed modification to explain the new type of experimental data on the dynamic response of the mitochondria. We submit that building a Virtual Muscle Cell is not possible without continuous experimental tests to improve the model. In close interaction with experiments we are developing a model for muscle energy metabolism and transport mediated by the creatine kinase isoforms which now already can explain many different types of experiments.
The model has been designed according to the spirit of the paper. The list of rate in the appendix has been corrected as follow:
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A theoretical expoloration of possible mechanisms of intracellular calcium oscillations has been studied, considering three hypothesis (see below). This model corresponds to the first hypothesis.
Intracellular Ca(2+) oscillations are commonly observed in a large number of cell types in response to stimulation by an extracellular agonist. In most cell types the mechanism of regular spiking is well understood and models based on Ca(2+)-induced Ca(2+) release (CICR) can account for many experimental observations. However, cells do not always exhibit simple Ca(2+) oscillations. In response to given agonists, some cells show more complex behaviour in the form of bursting, i.e. trains of Ca(2+) spikes separated by silent phases. Here we develop several theoretical models, based on physiologically plausible assumptions, that could account for complex intracellular Ca(2+) oscillations. The models are all based on one- or two-pool models based on CICR. We extend these models by (i) considering the inhibition of the Ca(2+)-release channel on a unique intracellular store at high cytosolic Ca(2+) concentrations, (ii) taking into account the Ca(2+)-activated degradation of inositol 1,4,5-trisphosphate (IP(3)), or (iii) considering explicity the evolution of the Ca(2+) concentration in two different pools, one sensitive and the other one insensitive to IP(3). Besides simple periodic oscillations, these three models can all account for more complex oscillatory behaviour in the form of bursting. Moreover, the model that takes the kinetics of IP(3) into account shows chaotic behaviour.
To the extent possible under law, all copyright and related orneighbouring rights to this encoded model have been dedicated to the publicdomain worldwide. Please refer to CC0 Public DomainDedication for more information.
A theoretical expoloration of possible mechanisms of intracellular calcium oscillations has been studied, considering three hypothesis (see below). This model corresponds to the second hypothesis.
Intracellular Ca(2+) oscillations are commonly observed in a large number of cell types in response to stimulation by an extracellular agonist. In most cell types the mechanism of regular spiking is well understood and models based on Ca(2+)-induced Ca(2+) release (CICR) can account for many experimental observations. However, cells do not always exhibit simple Ca(2+) oscillations. In response to given agonists, some cells show more complex behaviour in the form of bursting, i.e. trains of Ca(2+) spikes separated by silent phases. Here we develop several theoretical models, based on physiologically plausible assumptions, that could account for complex intracellular Ca(2+) oscillations. The models are all based on one- or two-pool models based on CICR. We extend these models by (i) considering the inhibition of the Ca(2+)-release channel on a unique intracellular store at high cytosolic Ca(2+) concentrations, (ii) taking into account the Ca(2+)-activated degradation of inositol 1,4,5-trisphosphate (IP(3)), or (iii) considering explicity the evolution of the Ca(2+) concentration in two different pools, one sensitive and the other one insensitive to IP(3). Besides simple periodic oscillations, these three models can all account for more complex oscillatory behaviour in the form of bursting. Moreover, the model that takes the kinetics of IP(3) into account shows chaotic behaviour.
To the extent possible under law, all copyright and related orneighbouring rights to this encoded model have been dedicated to the publicdomain worldwide. Please refer to CC0 Public DomainDedication for more information.
A theoretical expoloration of possible mechanisms of intracellular calcium oscillations has been studied, considering three hypothesis. This model corresponds to the third hypothesis.
Intracellular Ca(2+) oscillations are commonly observed in a large number of cell types in response to stimulation by an extracellular agonist. In most cell types the mechanism of regular spiking is well understood and models based on Ca(2+)-induced Ca(2+) release (CICR) can account for many experimental observations. However, cells do not always exhibit simple Ca(2+) oscillations. In response to given agonists, some cells show more complex behaviour in the form of bursting, i.e. trains of Ca(2+) spikes separated by silent phases. Here we develop several theoretical models, based on physiologically plausible assumptions, that could account for complex intracellular Ca(2+) oscillations. The models are all based on one- or two-pool models based on CICR. We extend these models by (i) considering the inhibition of the Ca(2+)-release channel on a unique intracellular store at high cytosolic Ca(2+) concentrations, (ii) taking into account the Ca(2+)-activated degradation of inositol 1,4,5-trisphosphate (IP(3)), or (iii) considering explicity the evolution of the Ca(2+) concentration in two different pools, one sensitive and the other one insensitive to IP(3). Besides simple periodic oscillations, these three models can all account for more complex oscillatory behaviour in the form of bursting. Moreover, the model that takes the kinetics of IP(3) into account shows chaotic behaviour.
To the extent possible under law, all copyright and related orneighbouring rights to this encoded model have been dedicated to the publicdomain worldwide. Please refer to CC0 Public DomainDedication for more information.
The current model reproduce the figure 7, panel B of the paper. Note that there is a typo in the figure. The ordinates represent the concentration of peroxyde, as stated in the legend, and not of oxygen. The model has been tested in COPASI (http://www.copasi.org/, build 13).
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
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The model should reproduce the figure 1C of the article (successfully reproduced in MathSBML). If your software does not support the variable \"time\", you can replace the assignmentRule: n = n0 * [ exp(-kbN*time) + kappa * (1 - exp(-kbN*time))] by n = n0 * kappa
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During the past decade, our knowledge of molecular mechanisms involved in growth factor signaling has proliferated almost explosively. However, the kinetics and control of information transfer through signaling networks remain poorly understood. This paper combines experimental kinetic analysis and computational modeling of the short term pattern of cellular responses to epidermal growth factor (EGF) in isolated hepatocytes. The experimental data show transient tyrosine phosphorylation of the EGF receptor (EGFR) and transient or sustained response patterns in multiple signaling proteins targeted by EGFR. Transient responses exhibit pronounced maxima, reached within 15-30 s of EGF stimulation and followed by a decline to relatively low (quasi-steady-state) levels. In contrast to earlier suggestions, we demonstrate that the experimentally observed transients can be accounted for without requiring receptor-mediated activation of specific tyrosine phosphatases, following EGF stimulation. The kinetic model predicts how the cellular response is controlled by the relative levels and activity states of signaling proteins and under what conditions activation patterns are transient or sustained. EGFR signaling patterns appear to be robust with respect to variations in many elemental rate constants within the range of experimentally measured values. On the other hand, we specify which changes in the kinetic scheme, rate constants, and total amounts of molecular factors involved are incompatible with the experimentally observed kinetics of signal transfer. Quantitation of signaling network responses to growth factors allows us to assess how cells process information controlling their growth and differentiation.
The model correctly reproduces all the figures from the paper. The curation has been done using SBMLodeSolver.
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This a model from the article: Prediction and validation of the distinct dynamics of transient and sustained ERK activation. Sasagawa S, Ozaki Y, Fujita K, Kuroda S Nat. Cell Biol.[2005 Apr; Volume: 7 (Issue: 4 )]: 365-73 15793571, Abstract: To elucidate the hidden dynamics of extracellular-signal-regulated kinase (ERK) signalling networks, we developed a simulation model of ERK signalling networks by constraining in silico dynamics based on in vivo dynamics in PC12 cells. We predicted and validated that transient ERK activation depends on rapid increases of epidermal growth factor and nerve growth factor (NGF) but not on their final concentrations, whereas sustained ERK activation depends on the final concentration of NGF but not on the temporal rate of increase. These ERK dynamics depend on Ras and Rap1 dynamics, the inactivation processes of which are growth-factor-dependent and -independent, respectively. Therefore, the Ras and Rap1 systems capture the temporal rate and concentration of growth factors, and encode these distinct physical properties into transient and sustained ERK activation, respectively.
Dynamics of active Ras, active Rap1 and phosphorylated ERK were correctly reproduced with CellDesigner 3.0
This a model from the article: Kinetic modelling of Amadori N-(1-deoxy-D-fructos-1-yl)-glycine degradation pathways. Part II--kinetic analysis. Martins SI, Van Boekel MA. Carbohydr Res2003 Jul;338(16):1665-78. 12873422, Abstract: A kinetic model for N-(1-deoxy-Image -fructos-1-yl)-glycine (DFG) thermal decomposition was proposed. Two temperatures (100 and 120 \u00b0C) and two pHs (5.5 and 6.8) were studied. The measured responses were DFG, 3-deoxyosone, 1-deoxyosone, methylglyoxal, acetic acid, formic acid, glucose, fructose, mannose and melanoidins. For each system the model parameters, the rate constants, were estimated by non-linear regression, via multiresponse modelling. The determinant criterion was used as the statistical fit criterion. Model discrimination was performed by both chemical insight and statistical tests (Posterior Probability and Akaike criterion). Kinetic analysis showed that at lower pH DFG 1,2-enolization is favoured whereas with increasing pH 2,3-enolization becomes a more relevant degradation pathway. The lower amount observed of 1-DG is related with its high reactivity. It was shown that acetic acid, a main degradation product from DFG, was mainly formed through 1-DG degradation. Also from the estimated parameters 3-DG was found to be the main precursor in carbohydrate fragments formation, responsible for colour formation. Some indication was given that as the reaction proceeded other compounds besides DFG become reactants themselves with the formation among others of methylglyoxal. The multiresponse kinetic analysis was shown to be both helpful in deriving relevant kinetic parameters as well as in obtaining insight into the reaction mechanism.
Model was intially tested in Jarnac.
The model was recently updated on 9th July 2010. The reference publication has reported two models M1 and M2, where the parameter values are given for conditions A) 100oC, pH5.5, B) 120oC, pH5.5, C) 100oC, pH6.8 and D) 120oC, pH6.8.
This model corresponds to the model M2 with condition 100oC, pH6.8
The model reproduces Figure 6 of the reference publication. The curation figure was recently added
The model reproduces Figures 4,5 and 6 of the publication. The analytical functions for cometabolites Catp, Camp, Cnadph, and Cnadp slightly differ from the equations given in the paper. These changes were made in consultation with Dr. Christophe Chassagnole and are essential for reproducing the figures. The dependency of the rate of change of extracellular glucose concentration on the ratio of biomass concentration to specific weight of biomass (Cx*rPTS/Rhox) is taken into account by appropriately adjusting the stoichiometries of the species involved in the phosphotransferase system (rPTS). The rmax values for the various reactions are obtained from experiments and are not provided in the paper. However, these were personally communicated to the JWS repository. The model has been successfully tested on MathSBML.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
In summary, you are entitled to use this encoded model in absolutely any manner you deem suitable, verbatim, or with modification, alone or embedded it in a larger context, redistribute it, commercially or not, in a restricted way or not.
Journal of Agricultural and Food Chemistry. 2002, 50(23):6725-6739
Abstract:
In the present study, a kinetic model of the Maillard reaction occurring in heated monosaccharide-casein systems was proposed. Its parameters, the reaction rate constants, were estimated via multiresponse modeling. The determinant criterion was used as the statistical fit criterion instead of the familiar least squares to avoid statistical problems. The kinetic model was extensively tested by varying the reaction conditions. Different sugars (glucose, fructose, galactose, and tagatose) were studied regarding their effect on the reaction kinetics. This study has shown the power of multiresponse modeling for the unraveling of complicated reaction routes as occur in the Maillard reaction. The iterative process of proposing a model, confronting it with experiments, and criticizing the model was passed through four times to arrive at a model that was largely consistent with all results obtained. A striking difference was found between aldose and ketose sugars as suggested by the modeling results: not the ketoses themselves but only their reaction products were found to be reactive in the Maillard reaction.
To the extent possible under law, all copyright and related orneighbouring rights to this encoded model have been dedicated to the publicdomain worldwide. Please refer to CC0 Public DomainDedication for more information.
The model should reproduce the figure 2F of the article.
The equation 7 has been split into equations 7a-7c, in order to take into account the different flux rates of Lysine and CML formation from Schiff.
The model was tested in Jarnac (SBML L2 V1) and Copasi (SBML L2 V3).
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
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The model reproduces ion and adenylate pool concentration corresponding to line 2 of Fig 3 of the publication. This model was tested successfully on Jarnac
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
In summary, you are entitled to use this encoded model in absolutely any manner you deem suitable, verbatim, or with modification, alone or embedded it in a larger context, redistribute it, commercially or not, in a restricted way or not.
SBML model of the interlocked feedback loop network
The model describes the circuit depicted in Fig. 4 and reproduces the simulations in Figure 5A and 5B. It provides initial conditions, parameter values and rules for the production rates of the following species: LHY mRNA (cLm), cytoplasmic LHY (cLc), nuclear LHY (cLn), TOC1 mRNA (cTm), cytoplasmic TOC1 (cTc), nuclear TOC1 (cTn),X mRNA (cXm), cytoplasmic X (cXc), nuclear X (cXn), Y mRNA (cYm), cytoplasmic Y (cYc), nuclear Y (cYn), nuclear P (cPn). This model was successfully tested on MathSBML and SBML ODE Solver.
Fig 5B is not in the right phase. However, the data is correct relative to the light/dark bars at the top of the figure.
Locke JC, Southern MM, Kozma-Bogn\u00e1r L, Hibberd V, Brown PE, Turner MS, Millar AJ
Molecular Systems Biology [2005; 1: 2005.0013]
Abstract:
Circadian clocks involve feedback loops that generate rhythmic expression of key genes. Molecular genetic studies in the higher plant Arabidopsis thaliana have revealed a complex clock network. The first part of the network to be identified, a transcriptional feedback loop comprising TIMING OF CAB EXPRESSION 1 (TOC1), LATE ELONGATED HYPOCOTYL (LHY) and CIRCADIAN CLOCK ASSOCIATED 1 (CCA1), fails to account for significant experimental data. We develop an extended model that is based upon a wider range of data and accurately predicts additional experimental results. The model comprises interlocking feedback loops comparable to those identified experimentally in other circadian systems. We propose that each loop receives input signals from light, and that each loop includes a hypothetical component that had not been explicitly identified. Analysis of the model predicted the properties of these components, including an acute light induction at dawn that is rapidly repressed by LHY and CCA1. We found this unexpected regulation in RNA levels of the evening-expressed gene GIGANTEA (GI), supporting our proposed network and making GI a strong candidate for this component.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
This is a hypothetical model of cell cycle that describes the molecular mechanism for regulating DNA synthesis, bud emergence, mitosis, and cell division in budding yeast.
The adaptive responses of a living cell to internal and external signals are controlled by networks of proteins whose interactions are so complex that the functional integration of the network cannot be comprehended by intuitive reasoning alone. Mathematical modeling, based on biochemical rate equations, provides a rigorous and reliable tool for unraveling the complexities of molecular regulatory networks. The budding yeast cell cycle is a challenging test case for this approach, because the control system is known in exquisite detail and its function is constrained by the phenotypic properties of >100 genetically engineered strains. We show that a mathematical model built on a consensus picture of this control system is largely successful in explaining the phenotypes of mutants described so far. A few inconsistencies between the model and experiments indicate aspects of the mechanism that require revision. In addition, the model allows one to frame and critique hypotheses about how the division cycle is regulated in wild-type and mutant cells, to predict the phenotypes of new mutant combinations, and to estimate the effective values of biochemical rate constants that are difficult to measure directly in vivo.
The model reproduces the time profiles of the different species in Figure 2 of the paper. The figure depicts the cycle of a daughter cell. Since the Mass Doubling Time (MDT) is 90 minutes, time t=90 from the model simulation will correspond to time t=0 in the paper. The model was successfully tested using MathSBML and SBML odeSolver.
To create a valid SBML file, a local parameter k=1 was added in the reaction 'Inactivation_274_CDC20'. Also, in order to annotate the protein and to have the interaction in the reaction graph to match figure 1 of the article, the reaction rate constants k_{mad2}, k_{bub2} and k_{lte1} are considered as species and renamed as MAD2, BUB2 and LTE1 in the model.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
This model was successfully tested on Jarnac and MathSBML. The model reproduces the time profile of \"Open Probability\" of the receptor as shown in Figure 4 of the publication. The value of calcium ion concentration \"c\" in this model is 10 microM.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
In summary, you are entitled to use this encoded model in absolutely any manner you deem suitable, verbatim, or with modification, alone or embedded it in a larger context, redistribute it, commercially or not, in a restricted way or not.
The model reproduces the same amplitude antiphase calcium oscillations of coupled cells depicted in Figure 5B of the publication. This model was successfully tested on Jarnac and MathSBML. The values of \"h1\" and \"h2\" are not given in the publication, but the antiphase oscillations are reproduced over a narrow range of values of h1, h2,c1,c2,D and p. The values of D and p are given, while the other values were plugged in, in order to simulate the time profiles shown in the Figure. The time t=0 in the figure may have been fixed after the system was allowed to settle, and hence does not correspond to the t=0 of the simulation.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
In summary, you are entitled to use this encoded model in absolutely any manner you deem suitable, verbatim, or with modification, alone or embedded it in a larger context, redistribute it, commercially or not, in a restricted way or not.
The model reproduces block A of Fig 5 and also Fig 3 (without the inclusion of Tg action). The model was successfully tested on MathSBML
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
In summary, you are entitled to use this encoded model in absolutely any manner you deem suitable, verbatim, or with modification, alone or embedded it in a larger context, redistribute it, commercially or not, in a restricted way or not.
The model reproduces the time profile of Open probability of the ryanodine receptor as shown in Fig 2A and 2B of the paper. The model was successfully tested on MathSBML and Jarnac.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
In summary, you are entitled to use this encoded model in absolutely any manner you deem suitable, verbatim, or with modification, alone or embedded it in a larger context, redistribute it, commercially or not, in a restricted way or not.
The model reproduces Fig 6 of the paper. The stoichiometry and rate of reactions involving uptake of metabolites from extracellular medium have been changed corresponding to Yvol (ratio of extracellular volume to cytosolic volume) mentioned in the publication. The extracellular and cytosolic compartments have been set to 1. Concentration of extracellular glucose, GlcX, is set to 6.7 according to the equation for cellular glucose uptake rate in Table 7 of the paper. The model was successfully tested on MathSBML and Jarnac
BioModels Curation : The model reproduces Fig 3 of the publication. By substituting a value of 1.4 for Tex it is possible to reproduce Fig 3C and 3D(iii), Fig 3A and 3D(i), are obtained by setting Tex=0. Also, note that the tryptophan concentrations have been normalized by 82 micromolar in the figures; the normalized concetrations can be obtained via the parameters To/s/t_norm. The model was successfully tested on MathSBML and Copasi.
This a model from the article: Fermentation pathway kinetics and metabolic flux control in suspended and immobilized Saccharomyces cerevisiae Jorge L. Galazzo and James E. Bailey Enzyme and Microbial TechnologyVolume 12, Issue 3, 1990, Pages 162-172. DOI:10.1016/0141-0229(90)90033-M Abstract: Measurements of rates of glucose uptake and of glycerol and ethanol formation combined with knowledge of the metabolic pathways involved in S. cerevisiae were employed to obtain in vivo rates of reaction catalysed by pathway enzymes for suspended and alginate-entrapped cells at pH 4.5 and 5.5. Intracellular concentrations of substrates and effectors for most key pathway enzymes were estimated from in vivo phosphorus-31 nuclear magnetic resonance measurements. These data show the validity in vivo of kinetic models previously proposed for phosphofructokinase and pyruvate kinase based on in vitro studies. Kinetic representations of hexokinase, glycogen synthetase, and glyceraldehyde 3-phosphate dehydrogenase, which incorporate major regulatory properties of these enzymes, are all consistent with the in vivo data. This detailed model of pathway kinetics and these data on intracellular metabolite concentrations allow evaluation of flux-control coefficients for all key enzymes involved in glucose catabolism under the four different cell environments examined. This analysis indicates that alginate entrapment increases the glucose uptake rate and shifts the step most influencing ethanol production from glucose uptake to phosphofructokinase. The rate of ATP utilization in these nongrowing cells strongly limits ethanol production at pH 5.5 but is relatively insignificant at pH 4.5.
Biomodels Curation: The model reproduces Fig 2 of the paper. However, it appears that the figures are swapped, hence the plot for V/Vmax vs Glucose actually represnts V/Vmax vs ATP and the vice versa is true for the other figure. The rate of hexokinase reaction that is obtained upon simulation of the model is 17.24 mM/min, therefore V/Vmax has a value of 17.24/68.5=0.25. For steady state values of Glucose and ATP (0.038 and 1.213 mM respectively), the V/Vmax values correctly correspond to 0.25, if we were to assume that the figures are swapped.
BioModels Curation updated on 25th November 2010: Figure 3 of the reference publication has been reproduced and added as a curation figure for the model.
Can yeast glycolysis be understood in terms of in vitro kinetics of the constituent enzymes? Testing biochemistry. Teusink,B et al.: Eur J Biochem 2000 Sep;267(17):5313-29. The model reproduces the steady-state fluxes and metabolite concentrations of the branched model as given in Table 4 of the paper. It is derived from the model on JWS online, but has the ATP consumption in the succinate branch with the same stoichiometrie as in the publication. The model was successfully tested on copasi v.4.4(build 26). For Vmax values, please note that there is a conversion factor of approx. 270 to convert from U/mg-protein as shown in Table 1 of the paper to mmol/(min*L_cytosol). The equilibrium constant for the ADH reaction in the paper is given for the reverse reaction (Keq = 1.45*10 4 ). The value used in this model is for the forward reaction: 1/Keq = 6.9*10 -5 . Vmax parameters values used (in [mM/min] except VmGLT):
VmGLT
97.264
mmol/min
VmGLK
226.45
VmPGI
339.667
VmPFK
182.903
VmALD
322.258
VmGAPDH_f
1184.52
VmGAPDH_r
6549.68
VmPGK
1306.45
VmPGM
2525.81
VmENO
365.806
VmPYK
1088.71
VmPDC
174.194
VmG3PDH
70.15
The result of the G6P steady state concentration (marked in red) differs slightly from the one given in table 4. of the publication Results for steady state:
orig. article
this model
Fluxes[mM/min] \u00a0
Glucose\u00a0
88\u00a0
88\u00a0
Ethanol\u00a0
129\u00a0
129\u00a0
Glycogen\u00a0
6\u00a0
6\u00a0
Trehalose\u00a0
4.8\u00a0
4.8\u00a0
(G6P flux through trehalose branch)
Glycerol\u00a0
18.2\u00a0
18.2\u00a0
Succinate\u00a0
3.6\u00a0
3.6\u00a0
Conc.[mM] \u00a0
G6P\u00a0
1.07\u00a0
1.03\u00a0
F6P\u00a0
0.11\u00a0
0.11\u00a0
F1,6P\u00a0
0.6\u00a0
0.6\u00a0
DHAP\u00a0
0.74\u00a0
0.74\u00a0
3PGA\u00a0
0.36\u00a0
0.36\u00a0
2PGA\u00a0
0.04\u00a0
0.04\u00a0
PEP\u00a0
0.07\u00a0
0.07\u00a0
PYR\u00a0
8.52\u00a0
8.52\u00a0
AcAld\u00a0
0.17\u00a0
0.17\u00a0
ATP\u00a0
2.51\u00a0
2.51\u00a0
ADP\u00a0
1.29\u00a0
1.29\u00a0
AMP\u00a0
0.3\u00a0
0.3\u00a0
NAD\u00a0
1.55\u00a0
1.55\u00a0
NADH\u00a0
0.04\u00a0
0.04\u00a0
Authors of the publication also mentioned a few misprints in the original article: in the kinetic law for ADH :
the species a should denote NAD and bEthanol
the last term in the equation should read bpq /( K ib K iq K p )
in the kinetic law for PFK :
R = 1 + \u03bb 1 + \u03bb 2 + g r \u03bb 1 \u03bb 2
equation L should read: L = L0*(..) 2 *(..) 2 *(..) 2 not L = L0*(..) 2 *(..) 2 *(..)
To make the model easier to curate, the species ATP , ADP and AMP were added. These are calculated via assignment rules from the active phosphate species, P , and the sum of all AXP , SUM_P .
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This a model from the article: Feedback regulation in the lactose operon: a mathematical modeling study and comparison with experimental data. Yildirim N, Mackey MC Biophys. J. 2003 12719218 , Abstract: A mathematical model for the regulation of induction in the lac operon in Escherichia coli is presented. This model takes into account the dynamics of the permease facilitating the internalization of external lactose; internal lactose; beta-galactosidase, which is involved in the conversion of lactose to allolactose, glucose and galactose; the allolactose interactions with the lac repressor; and mRNA. The final model consists of five nonlinear differential delay equations with delays due to the transcription and translation process. We have paid particular attention to the estimation of the parameters in the model. We have tested our model against two sets of beta-galactosidase activity versus time data, as well as a set of data on beta-galactosidase activity during periodic phosphate feeding. In all three cases we find excellent agreement between the data and the model predictions. Analytical and numerical studies also indicate that for physiologically realistic values of the external lactose and the bacterial growth rate, a regime exists where there may be bistable steady-state behavior, and that this corresponds to a cusp bifurcation in the model dynamics.
The model reproduces the time profile of beta-galactosidase activity as shown in Fig 3 of the paper. The delay functions for transcription (M) and translation (B and P) have been implemented by introducing intermediates ( I1, I2 and I3) in the reaction scheme which then give their respective products (I1-> M, I2 ->B and I3 ->P) after an appropriate length of time. The steady state values, attained upon simulation of model equations, for Allolactose (A), mRNA (M), beta-galactosidase (B), Lactose (L), and Permease (P) match with those predicted by the paper. The model was successfully tested on Jarnac, MathSBML and COPASI
Biomodels Curation: The model reproduces Fig 2f of the paper. The Vmax values for different reactions are obtained by multiplying the specific activites given in Table 3 of the paper with the protein concentration and an assay correction factor that was provided by the authors. The protein concentration is 202 mg/litre. The specific activities that need to be taken into consideration are those given for \"variable threonine\" in Table 3. The following are the assay correction factors provided by the authors: vak1=1.49; vak3=1.12; vasd=1.14; vhsd=1.42; vts=1.15; vhk=1.13. The model was successfully tested on MathSBML and Jarnac
For this model the differential equation for V_Ace was changed from: C*(AcP*H-K_eq*OAC) with C = 100 in the supplemental material to C*(OAc*H-K_eq*HOAc) with C = 100, as in Bulter et. al; PNAS(2004),101,2299-2304 , and a value for K_eq of 5*10^-4 after communication with the authors.
translated to SBML by: Lukas Endler(luen at tbi.univie.ac.at), Christoph Flamm (xtof at tbi.univie.ac.at)
Biomodels Curation The model reproduces 3a of the paper for glycolytic flux Vgly = 0.5. The authors have agreed that the values on Y-axis are marked wrong and hence there is a discrepancy between model simulation results and the figure. Also, note that the values of concentration and time are in dimensionless units. The model was successfully tested on MathSBML and Jarnac.
This a model from the article: A kinetic model of the branch-point between the methionine and threonine biosynthesis pathways in Arabidopsis thaliana. Curien G, Ravanel S, Dumas R Eur. J. Biochem. 2003 Dec; Volume: 270 (Issue: 23 )]:4615-27 14622248 , Abstract: This work proposes a model of the metabolic branch-point between the methionine and threonine biosynthesis pathways in Arabidopsis thaliana which involves kinetic competition for phosphohomoserine between the allosteric enzyme threonine synthase and the two-substrate enzyme cystathionine gamma-synthase. Threonine synthase is activated by S-adenosylmethionine and inhibited by AMP. Cystathionine gamma-synthase condenses phosphohomoserine to cysteine via a ping-pong mechanism. Reactions are irreversible and inhibited by inorganic phosphate. The modelling procedure included an examination of the kinetic links, the determination of the operating conditions in chloroplasts and the establishment of a computer model using the enzyme rate equations. To test the model, the branch-point was reconstituted with purified enzymes. The computer model showed a partial agreement with the in vitro results. The model was subsequently improved and was then found consistent with flux partition in vitro and in vivo. Under near physiological conditions, S-adenosylmethionine, but not AMP, modulates the partition of a steady-state flux of phosphohomoserine. The computer model indicates a high sensitivity of cystathionine flux to enzyme and S-adenosylmethionine concentrations. Cystathionine flux is sensitive to modulation of threonine flux whereas the reverse is not true. The cystathionine gamma-synthase kinetic mechanism favours a low sensitivity of the fluxes to cysteine. Though sensitivity to inorganic phosphate is low, its concentration conditions the dynamics of the system. Threonine synthase and cystathionine gamma-synthase display similar kinetic efficiencies in the metabolic context considered and are first-order for the phosphohomoserine substrate. Under these conditions outflows are coordinated.
Biomodels Curation The model simulates the flux for TS and CGS under conditions given in Table 2 and reproduces the dotted lines given in Table 3 of the paper. There is a typo in the equation for the apparent specificity constant for Phser, Kts (equation13). This was changed after communication with the authors to be: Kts = 5.9E-4+6.2E-2*pow(AdoMet,2.9)/(pow(32,2.9)+pow(AdoMet,2.9)). The model was successfully tested on Jarnac and Copasi. Due to a suggestion from Pedro Mendez the parameter AdoMet, TS and CGS where made constant species.
Biomodels CurationThe model simulates the flux values as given for \"kinetic model\" in Table 1 of the paper. The model was successfully tested on Jarnac.
Biomodels Curation: The paper refers to the model equations present in Bakker et al's \" Glycolysis in bloodstream from Trypanosoma brucei can be understood in terms of the kinetics of glycolytic enzymes\" (Pubmed ID: 9013556), also, the authors claim that some of the modifications in these equations were made based on the experimental results from the paper \"Contribution of glucose transport in the control of glycolytic flux in Trypanosoma brucei\" (Pubmed ID: 10468568). The model reproduces the various flux values in Fig 3 for 100% TPI activity. It also matches with the values provided in Table 2 of the paper. The model was successfully tested with Copasi and SBML ODE Solver. The volumes are set to the values containing 1 mg of total protein per microlitre total cell volume. To change the protein concentration use Vt , the total cell volume in micro litre per mg protein. To change the TPI activity use the global parameter TPIact .
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
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The paper describes both wild-type and mutant cells of G protein cycle by using different values of G protein deactivation. We chosed the wild-type, k=0.11 s-1.
The unit of the concentration for the proteins are numbers of molecules per cell.
Figure5(A) was reproduced with COPASI 4.0 (Build 18) and SBML_odeSolver. Figure5(B) was reproduced with COPASI 4.0 (Build 18).
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
In summary, you are entitled to use this encoded model in absolutely any manner you deem suitable, verbatim, or with modification, alone or embedded it in a larger context, redistribute it, commercially or not, in a restricted way or not.
This model is according to the paper Toward a detailed computational model for the mammalian circadian clock . In this model only interlocked negative and positive regulation of Per, Cry, Bmal gene are involved. Some initial values were not provided, therefore they were chosen to fit the curve from the paper.
Figure2A re-produced by Copasi 4.0.19 and roadRunner online.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
In summary, you are entitled to use this encoded model in absolutely any manner you deem suitable, verbatim, or with modification, alone or embedded it in a larger context, redistribute it, commercially or not, in a restricted way or not.
This is model in continous darkness (DD) described in the article Toward a detailed computational model for the mammalian circadian clock
This model features the full interlocked negative and positive regulation of Per,Cry,Bmal and REV-ERBalpha. The model exhibits robust oscillations quite independent of the initial conditions for teh parameters given. Each species is assigned zero as initial value, and the graph started at time=120h.
Simulation results could be reproduced using Copasi 4.0.19(development) and roadRunner online.
The model reproduces the percentage change of PIP_PM, PIP2_PM and IP3_Cyt as depicted in Figure 1 of the paper. The model also contains the equations for the analysis of PH-GFP experiments, however the initial value of PH_GFP has been set to zero to more accurately reproduce Figure 1. The units of cytosolic species are given in molecules/um^3. In order to convert them to uM, divide the concentration by 602. For the analysis of PH_GFP experiments, one should plug in the values of PH_GFP, IP3_PHGFP and PIP2_PHGFP from Table AI in the appendix. The model was successfully tested on MathSBML.
We studied the bradykinin-induced changes in phosphoinositide composition of N1E-115 neuroblastoma cells using a combination of biochemistry, microscope imaging, and mathematical modeling. Phosphatidylinositol-4,5-bisphosphate (PIP2) decreased over the first 30 s, and then recovered over the following 2-3 min. However, the rate and amount of inositol-1,4,5-trisphosphate (InsP3) production were much greater than the rate or amount of PIP2 decline. A mathematical model of phosphoinositide turnover based on this data predicted that PIP2 synthesis is also stimulated by bradykinin, causing an early transient increase in its concentration. This was subsequently confirmed experimentally. Then, we used single-cell microscopy to further examine phosphoinositide turnover by following the translocation of the pleckstrin homology domain of PLCdelta1 fused to green fluorescent protein (PH-GFP). The observed time course could be simulated by incorporating binding of PIP2 and InsP3 to PH-GFP into the model that had been used to analyze the biochemistry. Furthermore, this analysis could help to resolve a controversy over whether the translocation of PH-GFP from membrane to cytosol is due to a decrease in PIP2 on the membrane or an increase in InsP3 in cytosol; by computationally clamping the concentrations of each of these compounds, the model shows how both contribute to the dynamics of probe translocation.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
Biomodels Curation The model reproduces the flux value of \"Gpp p\" (rate of Glycerol synthesis) as depicted in Fig 3 of the paper. The model reproduces the flux for early exponential phase , however it can be used to reproduce the values for other phases by plugging in appropriate values for maximal rates as given in Table 1 and metabolite concentrations as given in Table 2 of the paper. The model was succesfully reproduced using Jarnac.
A mathematical model quantifying GnRH-induced LH secretion from gonadotropes by Blum et al (2000)
This paper includes three stages, and the model does not include the third stage. Also an event is included which remove the hormone GnRH at time=5min. Figure 1 and Figure 2 of the paper are reproduced, using SBML odeSolver. We choose to encode the model with the concentration of GnRH equal to 1.0nM.
This model is described in the paper Toward a detailed computational model for the mammalian circadian clock . In this model only interlocked negative and positive regulation of Per, Cry, Bmal gene are involved. Some initial values were not provided, therefore they were chosen to fit the curves from the paper.
Figure2C is re-produced by odeSolver.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
In summary, you are entitled to use this encoded model in absolutely any manner you deem suitable, verbatim, or with modification, alone or embedded it in a larger context, redistribute it, commercially or not, in a restricted way or not.
This model reproduces figure 5 and figure 4(B)of the paper, with Kinh represented by [G-GTP]. We arbitrarily chosed to set the initial concentration of D to 31 micorMolar based on legend of figure 4. [R] was not given anywhere in the paper and was chosen to calibrate the sigmoid response to an increased [GTP]. THe figure 5 in the model was successfully simulated on COPASI 4.0 ,the figure 4(B) was sucessfully simulated on both COPASI and SBML_odeSolver.
There are two curves for Kinh in the absence and presence of NaCl in the figure obtained from simulations of the model using parameters of set C and set D.Here in the model the initial value given is from set D.The parameters in set C :k7=0.5, k10=1.0,k5=0.1,the others are the same with set D.
The model reproduces FIG 11A and FIG 11B of the paper. However, please note that FIG 11B is a plot of normalised amounts versus time. The \"stoichiometry\" field has been used to convert fluxes from membrane species to volume species. The value of 0.0009967 is a product of (Surface to Volume_M*(1/Avagadro's number)*1E21. 0.6 is the surface to volume ratio of the plasma membrane, 1E21 is required for a unit surface to volume ratio and the Avagadro's number is present in the denominator to convert molecules to moles. The model was successfully tested using MathSBML and SBML ODESolver. All the kinetic laws have the unit items per second , which requires the one reaction taking place in the cytoplasm - IP3Phosphatase - to include an explicit conversion factor both in the kinetic law and the stoichiometry of IP3_C . The kinetic law is multiplied and the stoichiometry divided by the number of molecules per micro-mole. This conversion factor is only required for correct units and can be replaced by 1, if it should lead to numerical problems.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
In summary, you are entitled to use this encoded model in absolutely any manner you deem suitable, verbatim, or with modification, alone or embedded it in a larger context, redistribute it, commercially or not, in a restricted way or not.
This model was created according to the paper Inhibition of Adenylate Cyclase Is Mediated by the High Affinity Conformation of the alpha2-Adrenergic Receptor published in 1988.
The figure4 (steady state curve) in the paper has been simulated having the same plot with Copasi 4.0.19 (development) and roadRunner(online).Because the initial concentration of R and D were not given in the paper ,so we gave it 1e-9 Mol/L and 1e-8 Mol/L respectively.
Pay attention that the simulations of steady state concentration of species in arbitrary units are shown for figure4 and figure6 in the paper.
This is model is according to the paperToward a detailed computational model for the mammalian circadian clock
In this model interlocked negative and positive regulation of Per,Cry,Bmal,REV-ERBalpha genes are all involved.The model is actually robust so the initial conditions are unimportant.We gave every entity zero as initial value,and start the graph at time=132h.
The simulation results in figure 8B can be reproduced by roadRunner online and Copasi. We use a ceiling function to simulate the day-light cycle.
Biomodels Curation The model reproduces the time series depicted in Fig 2 of the paper. Also, by varying the values of Vmax for the second kinase (k5) the time series of X3P as shown in Fig3 can be reproduced. The model was successfully tested on MathSBML and Jarnac.
This model is according to the paper Reduced-order modeling of biochemical networks: application to the GTPase-cycle signalling module by Maurya et al 2006.The figure 4c is reproduced by Copasi 4.0.19 (development) .It is three-dimensional logarithmic plots show the output of simulations of Z at various concentrations of R and GAP.
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This model is according to the paper Computational modeling reveals how interplay between components of a GTPase-cycle module regulates signal transduction by Bornheimer et al 2004.The figure 3 is reproduced by Copasi 4.0.19 (development) .It is three-dimensional logarithmic plots show the output of simulations of Z and v at various concentrations of R and GAP.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
In summary, you are entitled to use this encoded model in absolutely any manner you deem suitable, verbatim, or with modification, alone or embedded it in a larger context, redistribute it, commercially or not, in a restricted way or not.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
In summary, you are entitled to use this encoded model in absolutely any manner you deem suitable, verbatim, or with modification, alone or embedded it in a larger context, redistribute it, commercially or not, in a restricted way or not.
The model reproduces Fig 2B, D, F, and 2H. The dynamics correspond to a stimulus of 1 U/ml of thrombin which is equal to 0.01 uM. Phosphorylated MLC is the sum of pMLC (s359) and ppMLC (s360). A slight discrepancy in peak values of species between the figure in the paper and simulation result might be due to different initial conditions in the two sets. The model was successfully tested on MathSBML. It is possible to simulate the model on other software that do not support \"Events\" at this time by removing the \"listOfEvents\" and substituting a value of 0.01 for thrombin (s2). This does not change the model very much. With the latter format, the model was also successfully tested on Copasi.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
In summary, you are entitled to use this encoded model in absolutely any manner you deem suitable, verbatim, or with modification, alone or embedded it in a larger context, redistribute it, commercially or not, in a restricted way or not.
This a model from the article: Experimental validation of a predicted feedback loop in the multi-oscillator clock of Arabidopsis thaliana. Locke JC, Kozma-Bogn\u00e1r L, Gould PD, Feh\u00e9r B, Kevei E, Nagy F, Turner MS, Hall A, Millar AJ Mol. Syst. Biol.2006;Volume:2;Page:59 17102804, Abstract: Our computational model of the circadian clock comprised the feedback loop between LATE ELONGATED HYPOCOTYL (LHY), CIRCADIAN CLOCK ASSOCIATED 1 (CCA1) and TIMING OF CAB EXPRESSION 1 (TOC1), and a predicted, interlocking feedback loop involving TOC1 and a hypothetical component Y. Experiments based on model predictions suggested GIGANTEA (GI) as a candidate for Y. We now extend the model to include a recently demonstrated feedback loop between the TOC1 homologues PSEUDO-RESPONSE REGULATOR 7 (PRR7), PRR9 and LHY and CCA1. This three-loop network explains the rhythmic phenotype of toc1 mutant alleles. Model predictions fit closely to new data on the gi;lhy;cca1 mutant, which confirm that GI is a major contributor to Y function. Analysis of the three-loop network suggests that the plant clock consists of morning and evening oscillators, coupled intracellularly, which may be analogous to coupled, morning and evening clock cells in Drosophila and the mouse.
The model describes a three loops model of the Arabidopsis circadian clock. It provides initial conditions, parameter values and reactions for the production rates of the following species: LHY mRNA (cLm), cytoplasmic LHY (cLc), nuclear LHY (cLn), TOC1 mRNA (cTm), cytoplasmic TOC1 (cTc), nuclear TOC1 (cTn), X mRNA (cXm), cytoplasmic X (cXc), nuclear X (cXn), Y mRNA (cYm), cytoplasmic Y (cYc), nuclear Y (cYn), nuclear P (cPn), APRR7/9 mRNA, cytoplasmic APRR7/9, and nuclear APRR7/9.
The paper describes the behaviour of the model in constant light (LL) and day-night cycle (LD). However, the current model only contains the LL cycle. Some parameter values should be changed from the wild-type (WT) ones in order to simulate the effect of mutations. These changes are listed in the notes of relevant parameters.
This model by Jana Wolf et al. 2001 is the first mechanistic model of respiratory oscillations in Saccharomyces cerevisae. It is based on the assumption that feedback inhibition of cysteine on the sulfate transporters leads to oscillations in this pathway and causes oscillations in respiratory activity via inhibition of cytochrome c oxidase by hydrogen disulfide. The model is qualitative/semi-quantitative and reproduces the respiratory oscillation pattern quite well. It is based on very coarse-grained representations of the mitochondrial tricarboxylic acid cycle and the mitochondrial electron transport chain (oxidative phosphorylation). The sulfate assimilatory pathways also contains some significant simplifcations.
The model corresponds to Fig. 2B of the paper, with a slight phase shift of the oscillations. No initial conditions were given in the paper, and thus they were chosen arbitrarily in a range that lies within the basin of attraction of the limit cycle oscillations. Species IDs correspond to IDs used by the authors, while SBML names are more common abbreviations.
Caveats: 1) Equilibrated transport: The model assumes fast equilibration between mitochondria and cytoplasm for the metabolites NADH, NAD+, H2S and Acetyl-CoA. 2) Cytosolic mass conservation ATP/ADP: The model uses mass conservation for cytosolic adenosine nucleotides with is however not encoded in the stoichiometry, but is implied by the lumped reaction v4. This reaction combines the enzymatic reactions of phosphoadenylyl-sulfate reductase (thioredoxin) (yeast protein Met16p, EC 1.8.4.8) and sulfite reductase (NADPH) (subunits Met5p and Met10p, EC 1.8.1.2). EC 1.8.4.8 also has adenosine-3',5'-bismonophosphate (PAP, not to confuse with ID pap in this model, standing for PAPS) as a product. PAP is the substrate for enzyme 3'(2'),5'-bisphosphate nucleotidase (Met22p, EC:3.1.3.7) which would revover AMP (and Pi). Then AMP can be assumed to be equilibrated with ATP and ADP via adenylate kinase, as often used in metabolic models. This AMP production is implied in the mass conservation for cytosolic adenosine phosphates. Accounting for these reactions explicitly does not change the dynamics of the model significantly. An according version can be obtained from the SBML creator (Rainer Machne, mailto:raim@tbi.univie.ac.at). 3) Redox balance: The enzyme sulfite reductase (NADPH) (subunits Met5p and Met10p, EC 1.8.1.2, part of reaction v4) actually uses NADPH, and the authors assume equilibration of NADH and NADPH. But actually S. cerevisiae specifically is missing the according enzyme transhydrogenase (EC 1.6.1.1 or EC 1.6.1.2). EC 1.8.4.8 also oxidizes thioredoxin and would actually require an additional NADPH for thioredoxin recovery (reduction). This would slightly affect the redox balance of the model. 4) Energy balance: Reaction v7 lumps NAD-dependent alcohol dehydrogenase (EC 1.1.1.1), aldehyde dehydrogenase (NAD+) (EC 1.2.1.3) and acetyl-CoA synthase (EC 6.2.1.1). The latter reaction would actually consume ATP as a co-factor, producing AMP+PPi, and this is not included in the model. This would slightly bias the model's energy balance.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
In summary, you are entitled to use this encoded model in absolutely any manner you deem suitable, verbatim, or with modification, alone or embedded it in a larger context, redistribute it, commercially or not, in a restricted way or not.
Many molecular chaperones are also known as heat shock proteins because they are synthesised in increased amounts after brief exposure of cells to elevated temperatures. They have many cellular functions and are involved in the folding of nascent proteins, the re-folding of denatured proteins, the prevention of protein aggregation, and assisting the targeting of proteins for degradation by the proteasome and lysosomes. They also have a role in apoptosis and are involved in modulating signals for immune and inflammatory responses. Stress-induced transcription of heat shock proteins requires the activation of heat shock factor (HSF). Under normal conditions, HSF is bound to heat shock proteins resulting in feedback repression. During stress, cellular proteins undergo denaturation and sequester heat shock proteins bound to HSF, which is then able to become transcriptionally active. The induction of heat shock proteins is impaired with age and there is also a decline in chaperone function. Aberrant/damaged proteins accumulate with age and are implicated in several important age-related conditions (e.g. Alzheimer's disease, Parkinson's disease, and cataract). Therefore, the balance between damaged proteins and available free chaperones may be greatly disturbed during ageing. We have developed a mathematical model to describe the heat shock system. The aim of the model is two-fold: to explore the heat shock system and its implications in ageing; and to demonstrate how to build a model of a biological system using our simulation system (biology of ageing e-science integration and simulation (BASIS)).
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
The model reproduces Fig 1A of the paper. The model was successfully tested on MathSBML.
This model originates from BioModels Database: A Database of Annotated Published Models. It is copyright (c) 2005-2006 The BioModels Team. For more information see the terms of use .
NCBS Curation Comments This model shows the control mechanism of Jak-Stat pathway, here SOCS1 (Suppressor of cytokine signaling-I) was identified as the negative regulator of Jak and STAT signal transduction pathway. Note: There are a few ambiguities in the paper like initial concentration of IFN and some reactions were missing in the paper that were employed for obtaining the results. The graphs are almost similar to the graphs as shown in the paper but still some ambiguities regarding the concentration are there. Thanks to Dr Satoshi Yamada for clarifying some of those ambiguities and providing the values used in simulations.
Biomodels Curation Comments The model reproduces Fig 2 (A,C,E,G,I,K,M) of the paper. The set of equations present in the paper are inadequate to reproduce the figures mentioned . The model appears to have been fine tuned after correspondence between the curators at NCBS and the authors. There is however a slight discrepancy between the simulation results and the plots in the paper. The model was tested on MathSBML.
This model originates from BioModels Database: A Database of Annotated Published Models. It is copyright (c) 2005-2006 The BioModels Team. For more information see the terms of use .
NCBS Curation Comments: This model shows the control mechanism of Jak-Stat pathway, here SOCS1 (Suppressor of cytokine signaling-I) was identified as the negative regulator of Jak and STAT signal transduction pathway. This is the knockout version of Jak-Stat pathway in this model the SOCS1 has been knocked out i.e it formation is not shown. The graphs are almost similar to the graphs as shown in the paper but STAT1n graph has some ambiguities. Thanks to Dr Satoshi Yamada for clarifying some of those ambiguities and providing the values used in simulations.
Biomodels Curation Comments: The model reproduces the figures 2 (B,D,F,H,J,L,N) corresponding to JAK/STAT activation in SOCS1 knock out cells. The model was successfully tested on MathSBML
This model originates from BioModels Database: A Database of Annotated Published Models. It is copyright (c) 2005-2006 The BioModels Team. For more information see the terms of use .
The model reproduces the circadian charecteristics as given in Table 1 for the PRR7-PRR9-Y model. The model makes use of the event section to introduce light at 30 hours. The Zeitgeber (ZT) times for species shown in Table 1 can be reproduced by looking at the time it takes for species to reach peak values after the introduction of light. The model was successfully tested on MathSBML.
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The model reproduces the time profile of cYm and cTm under light-dark cycles as depicted in Fig 4 and Fig 5 respectively. 12 hour light-dark cycles are accomplished using a simple algorithm in the event section. The model was successfully tested using MathSBML.
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The model reproduces the time profile of TOC1 and Y mRNA for a 8:16 cycle as depicted in Fig7A and 7B. A simple algorithm in the event section accomplishes the 8 hour light and 16 hour dark cycle. The model was successfully tested on MathSBML
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The model reproduces the time profile of cytosolic and intracellular calcium as depicted in the upper panel of Fig 2 in the paper. The model was successfully tested on MathSBML and Jarnac.
This is model according to the paper \"A Molecular Network That Produces Spontaneous Oscillations in Excitalbe Cells of Dictyostelium. Figure 3 has been reproduced by Copasi 4.0.20(development) \". However four of the parameters have been changed , see details in notes.
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The model reproduces the temporal evolution of Glycogen phosphorylase for a vale of Vm5=30 as depicted in Fig 1a of the paper. The model makes use of calcium oscillations from the Borghans model to stimulate the activation of glycogen phosphorylase. Hence, this is a simple extension of the Borghans model. The model was succesfully tested on MathSBML and Jarnac.
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The model reproduces Fig 5A of the paper. The ligand concentration is increased from 3E-5 to 0.01 at time t=2500 to ensure that the system reaches steady state. Hence, the time t=0 of the paper corresponds to t=2500 in the model. The peak value of the active ligand receptor complex is off by a value of 1.25, the authors have stated that this discrepancy is due to the fact that the figure in the paper corresponds to a slightly different parameter set. The model was successfully tested on MathSBML.
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The model reproduces active Caspase-3 time profile corresponding to the total Apaf-1 value of 20 nM as depicted in Fig 2-A . The model was successfully tested on MathSBML.
This model represents the non-competitive binding of XIAP to Casapase-3 and Caspase-9. In other words, XIAP mediated feedback is abolished in this model. The authors state that this leads to bistable-reversible behaviour as depicted in Fig 4C. The wild-type model displays a bistable-irreversible profile. This shows that irreversibility requires XIAP mediated feedback. The model was tested on MathSBML. However, please note that the paper does not contain any figure that corresponds to simulation of the Non-Competitive model.
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The model describes time dependent gene expression as a means to enable cells to adapt metabolic activity optimally based on environmental conditions. It uses a simple unbranched pathway and a constraint of fixed total enzyme. It calculates enzyme profiles at different times which optimise a performance function, and compares them to experimental data. The initial model is cell-type agnostic, while the experimeental data is from yeast.
A computational approach is used to analyse temporal gene expression in the context of metabolic regulation. It is based on the assumption that cells developed optimal adaptation strategies to changing environmental conditions. Time- dependent enzyme profiles are calculated which optimize the function of a metabolic pathway under the constraint of limited total enzyme amount. For linear model pathways it is shown that wave-like enzyme profiles are optimal for a rapid substrate turnover. For the central metabolism of yeast cells enzyme profiles are calculated which ensure long-term homeostasis of key metabolites under conditions of a diauxic shift. These enzyme profiles are in close correlation with observed gene expression data. Our results demonstrate that optimality principles help to rationalize observed gene expression profiles.
This model is from the paper Prediction of temporal gene expression metabolic optimization by re-distribution of enzyme activities. The model describes optimal enzyme profiles and metabolite time courses for a simple linear metabolic pathway (n=2). Figure 1 was reproduced using roadRunner. The values of k1 and k2 were not explicitly stated in the publication, but calculations were performed for equal catalytic efficiencies of the enzymes (ki=k), hence the curator assigned k1=k2=1. Also enzyme concentrations are given in units of Etot; times are given in units of 1/(k*Etot) in the papaer, for simplicity , we use defalut units of the SBML to present the concentration and time.
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Proctor2007 - Age related decline of proteolysis, ubiquitin-proteome system
This is a stochastic model of the ubiquitin-proteasome system for a generic pool of native proteins (NatP), which have a half-life of about 10 hours under normal conditions. It is assumed that these proteins are only degraded after they have lost their native structure due to a damage event. This is represented in the model by the misfolding reaction which depends on the level of reactive oxygen species (ROS) in the cell. Misfolded proteins (MisP) are first bound by an E3 ubiquitin ligase. Ubiquitin (Ub) is activated by E1 (ubiquitin-activating enzyme) and then passed to E2 (ubiquitin-conjugating enzyme). The E2 enzyme then passes the ubiquitin molecule to the E3/MisP complex with the net effect that the misfolded protein is monoubiquitinated and both E2 and E3 are released. Further ubiquitin molecules are added in a step-wise manner. When the chain of ubiquitin molecules is of length 4 or more, the polyubiquitinated misfolded protein may bind to the proteasome. The model also includes de-ubiquitinating enzymes (DUB) which cleave ubiquitin molecules from the chain in a step-wise manner. They work on chains attached to misfolded proteins both unbound and bound to the proteasomes. Misfolded proteins bound to the proteasome may be degraded releasing ubiquitin. Misfolded proteins including ubiquitinated proteins may also aggregate. Aggregates (AggP) may be sequestered (Seq_AggP) which takes them out of harm's way or they may bind to the proteasome (AggP_Proteasome). Proteasomes bound by aggregates are no longer available for protein degradation.
Figure 2 and Figure 3 has been simulated using Gillespie2.
BACKGROUND: The ubiquitin-proteasome system is responsible for homeostatic degradation of intact protein substrates as well as the elimination of damaged or misfolded proteins that might otherwise aggregate. During ageing there is a decline in proteasome activity and an increase in aggregated proteins. Many neurodegenerative diseases are characterised by the presence of distinctive ubiquitin-positive inclusion bodies in affected regions of the brain. These inclusions consist of insoluble, unfolded, ubiquitinated polypeptides that fail to be targeted and degraded by the proteasome. We are using a systems biology approach to try and determine the primary event in the decline in proteolytic capacity with age and whether there is in fact a vicious cycle of inhibition, with accumulating aggregates further inhibiting proteolysis, prompting accumulation of aggregates and so on. A stochastic model of the ubiquitin-proteasome system has been developed using the Systems Biology Mark-up Language (SBML). Simulations are carried out on the BASIS (Biology of Ageing e-Science Integration and Simulation) system and the model output is compared to experimental data wherein levels of ubiquitin and ubiquitinated substrates are monitored in cultured cells under various conditions. The model can be used to predict the effects of different experimental procedures such as inhibition of the proteasome or shutting down the enzyme cascade responsible for ubiquitin conjugation. RESULTS: The model output shows good agreement with experimental data under a number of different conditions. However, our model predicts that monomeric ubiquitin pools are always depleted under conditions of proteasome inhibition, whereas experimental data show that monomeric pools were depleted in IMR-90 cells but not in ts20 cells, suggesting that cell lines vary in their ability to replenish ubiquitin pools and there is the need to incorporate ubiquitin turnover into the model. Sensitivity analysis of the model revealed which parameters have an important effect on protein turnover and aggregation kinetics. CONCLUSION: We have developed a model of the ubiquitin-proteasome system using an iterative approach of model building and validation against experimental data. Using SBML to encode the model ensures that it can be easily modified and extended as more data become available. Important aspects to be included in subsequent models are details of ubiquitin turnover, models of autophagy, the inclusion of a pool of short-lived proteins and further details of the aggregation process.
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This model is according to the paper Dynamic Simulation on the Arachidonic Acid Metabolic Network . Figure 2A has been reproduced by SBML ode solver on line. In the original model, all the reactions are presented as ODE directly. So curator rewrite each reaction according to the semantics of the paper. In this paper, the authors used quict complex kinetics law to describe the catalysis in the network, curators did not necessarily know all the complete meanings of the paper.
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The model reproduces Figure 9 of the paper. Please note that active MPF and cyclin concentrations in the paper are given relative to total cdc2 concentration (100nM). Active MPF (dimer_p) is the cyclin-cdc2 complex that is phosphorylated at Thr161. The earlier versions of the model was successfully tested on MathSBML and Jarnac, and the current version was checked in Copasi.
To contribute to a deeper understanding of M-phase control in eukaryotic cells, we have constructed a model based on the biochemistry of M-phase promoting factor (MPF) in Xenopus oocyte extracts, where there is evidence for two positive feedback loops (MPF stimulates its own production by activating Cdc25 and inhibiting Wee1) and a negative feedback loop (MPF stimulates its own destruction by indirectly activating the ubiquitin pathway that degrades its cyclin subunit). To uncover the full dynamical possibilities of the control system, we translate the regulatory network into a set of differential equations and study these equations by graphical techniques and computer simulation. The positive feedback loops in the model account for thresholds and time lags in cyclin-induced and MPF-induced activation of MPF, and the model can be fitted quantitatively to these experimental observations. The negative feedback loop is consistent with observed time lags in MPF-induced cyclin degradation. Furthermore, our model indicates that there are two possible mechanisms for autonomous oscillations. One is driven by the positive feedback loops, resulting in phosphorylation and abrupt dephosphorylation of the Cdc2 subunit at an inhibitory tyrosine residue. These oscillations are typical of oocyte extracts. The other type is driven by the negative feedback loop, involving rapid cyclin turnover and negligible phosphorylation of the tyrosine residue of Cdc2. The early mitotic cycles of intact embryos exhibit such characteristics. In addition, by assuming that unreplicated DNA interferes with M-phase initiation by activating the phosphatases that oppose MPF in the positive feedback loops, we can simulate the effect of addition of sperm nuclei to oocyte extracts, and the lengthening of cycle times at the mid-blastula transition of intact embryos.
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This model is according to the paper from Axel Kowald Alternative pathways as mechanism for the negative effects associated with overexpression of superoxide dismutase.
Reactions from 1 to 17 are listed in the paper, note that for clarity species whose concentrations are assumed to be constant (e.g.water, oxygen,protons, metal ions) are omitted from the diagram. In the paper, v16 is a fast reaction, but we do not use fast reaction in the model.
Figure2 has been reproduced by both SBMLodeSolver and Copasi4.0.20(development) . Figure 3 has been obtained with Copasi4.0.20(development) using parameter scan.
The steady-state of [LOO*] a little bit lower than showed on the paper, I guess it may be the simulation method used in the paper use fast reaction and also the reaction (5) listed on Page 831 on the paper is slightly different from equation (2) on Page 832. The rest of them are the quite the same.
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This model is according to the paper A systems biology dynamical model of mammalian G1 cell cycle progression. Supplementary Figure 2A has been reproduced by the MathSBML and CellDesigner. All the data of this model are from the set 2 of Supplementary talbe2.
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This model is from the article: Dynamics of the cell cycle: checkpoints, sizers, and timers. \t Qu Z, MacLellan WR, Weiss JN Biophys. J.2003 Dec; 85(6): 3600-11 14645053, Abstract: We have developed a generic mathematical model of a cell cycle signaling network in higher eukaryotes that can be used to simulate both the G1/S and G2/M transitions. In our model, the positive feedback facilitated by CDC25 and wee1 causes bistability in cyclin-dependent kinase activity, whereas the negative feedback facilitated by SKP2 or anaphase-promoting-complex turns this bistable behavior into limit cycle behavior. The cell cycle checkpoint is a Hopf bifurcation point. These behaviors are coordinated by growth and division to maintain normal cell cycle and size homeostasis. This model successfully reproduces sizer, timer, and the restriction point features of the eukaryotic cell cycle, in addition to other experimental findings.
Figure6B has been reproduced by both SBMLodeSolver online and MathSBML. We do not include the synthesis of cyclins is proportional to cell size (Equation 2 in Page3604 of the paper) in this model. The author of the paper keep all the variables and parameters dimensionless. But in the model, we choose to use default units of SBML.
The model reproduces the time evolution of several species as depicted in Fig 4 of the paper. Events have been used to reset cell mass when the value of M-phase promoting factor (MPF) decreases through 0.1. The model was successfully tested on Cell Designer.
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The model reproduces the temporal evolution of four variables depicted in Fig 2a. The solution is generated for median parameter values as given in Table 3. Result shown was generated by MathSBML.
Model reproduces Fig 4 of the paper. For fraction of phosphorylated protein, W_star, the model reproduces panel b in the same figure. Model successfully tested on MathSBML and Jarnac.
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This model encoded according to the paper Hormone induced Calcium Oscillations in Liver Cells Can Be Explained by a Simple One Pool Model. The values of parameters a and alpha are varioused inorder to simulate results in different situations. For Figure 3A, a=3.5,alpha=1.2 ; Figure 3B, a=3,alpha=5 ; Figure 3C a= 0.95, alpha=1.5; Figure3D, a=1, alpha=5. Keep in mind that the value for the xy axies are arbitrary value. Figures3 in the paper are reproduced by COPASI 4.0.20(development) , and SBMLodeSolver online.
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Another model from Hormone induced Calcium Oscillations in Liver Cells Can Be Explained by a Simply One Pool Model. Anatomy of a single Ca2+ spike. Figure4A has been simulated by COPASI4.0.20(development). However, the simulated figure is slightly different from the paper, single spike of Ca2+ is around \"6\" time arbitrary units instead \"9\" time arbitrary units displayed in the paper.
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This model encoded according to the paper Cross-talk and decision making in MAP kinase pathways. Supplementary Figure 2 has been reproduced by COPASI4.0.20 (development) using parameter scan method. You probably need to uncheck \"always use initial conditions\" in copasi when you simulate for the second run in order to get the figure. S1 scale from 0 to 12. Keep in mind that the y axis is the fractions of excited X3 and Y3, meaning that X3P and Y3P are normalized by total concentration X3T and Y3T.
The results from modeling the pathway in Supplementary Figure1a, including both activation and inhibition. According to the paper, the value of ka and kd should in the orange region (ka belongs [0,1], kd belongs [1,10]) so assigned ka=0, kd=1.
The author made the simplifying assumption that the interactions between the pathways are symmetric. Thus the k12xy=k12yx=ka, k33xy=k33yx=kd.
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This model is according to the paper Signal-induced Ca2+ oscillations: Properties of a model based on Ca2+-induced Ca2+ release. Figure4B in the paper has been reproduced by RoadRunner and MathSBML. Damped Ca2+ oscillations elicited by a transient pulse of InsP3 applied intracellularly to a resting, non-oscillatory cell.
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Model is according to the paper Contribution of Persistent Na+ Current and M-Type K+ Current to Somatic Bursting in CA1 Pyramidal Cell: Combined Experimental. Figure6Da has been reproduced by MathSBML. The original model from ModelDB. http://senselab.med.yale.edu/modeldb/
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Model is according to the paper Contribution of Persistent Na+ Current and M-Type K+ Current to Somatic Bursting in CA1 Pyramidal Cell: Combined Experimental. This is the second model from this paper for the non-zero [Ca2+] initial value, parameters and the kinetics quations from Table2 in the paper. Figure9Aa has been reproduced by MathSBML. The original model from ModelDB. http://senselab.med.yale.edu/modeldb/
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The model reproduces Fig 3a of the paper. Please note that the authors mention that they used a value of 2 for n, n being the power in the positive feedback function for kinase autocatalysis, however the model here has n=1.95 because this results in a simulation that is identical to Fig 3a. The model was successfully tested on MathSBML.
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This model is according to the paper Cellular consequences of HEGR mutations in the long QT syndrome: precursors to sudden cardiac death. The author used Markovian model of cardiac Ikr in the paper. Figure4B in the paper has been reproduced using CellDesigner3.5.1. The cell is depolarized to the indicated test potential for 250ms (from 50ms to 300ms) from a holding potential of -40mV and then repolarized to -40mV. Change the value for vtest from -30,-20,-10,0,10,20,30,40 for each simulation in order to produce the different cureve in the paper.
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The model reproduces the calcium oscillation dependent activation-deactivation kinetics of nuclear factor of activated T cells (NFAT) as depicted in Fig 4a of the paper. A simple algorithm in the events section takes care of the calcium oscillation. The model was successfully tested on MathSBML.
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The model reproduces the kinetics of the nuclear factor of activated cells (NFAT) as depicted in Figure 3a of the paper. Model was successfully tested on Jarnac and MathSBML
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The model is described in the paper by Wu and Chang (2006). Diethyl pyrocarbonate, a histidine-modifying agent, directly stimulates activity of ATP-sensitive potassium channels in pituitary GH3 cells. Biochem Pharmacol. 71(5): 615-23.
The unit of time is ms, and the simulation time is 80 s, that is 8e4 ms. Therfore, you probably need to increase the maximum steps for your simulator.
The figure 7 has been reproduced by MathSBML. Application of DEPC as indicated at horizontal bar was mimicked by an increase of maximal conductance of Katp-channels from 500 to 530 ps at t=30 s.
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This model according to the paper A Theoretical Framework for Specificity in Cell Signalling The model is \"basic architecture\" of Figure2A. Figure2B, Figure2C have been reproduced by MathSBML. The reproduced figures are slightly different from the original ones in the paper, the peak of [x2] is higher than 1 and is not decreasing dramatically when [x0]=0. And I think maybe the author shift the or scale the curves.
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The model is according to the paper Na+ Channel Mutation That Causes Both Brugada and Long-QT Syndrome Phenotypes: A Simulation Study of Mechanism Original model comes from ModelDB with accession number: 62661. This is the wide type model. All the values and reactions obtained from Data Supplement6: Appendix of the paper. Figure3 has been reproduced by MathSBML. The stimulus v=-30mV during the time from 5ms to 20 ms displayed in the event. The meaning for the keyword, C: Close states; O: Open states; IF: Fast inactivation states; IC: Closed-Inactivation states; IM: Intermediat Inactivation states.
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The model is according to the paper Simple Model of Spiking Neurons In this paper, a simple spiking model is presented that is as biologically plausible as the Hodgkin-Huxley model, yet as computationally efficient as the integrate-and-fire model. Known types of neurons correspond to different values of the parameters a,b,c,d in the model. Figure2RS,IB,CH,FS,LTS have been simulated by MathSBML.
RS: a=0.02, b=0.2, c=-65, d=8.
IB: a=0.02,b=0.2,c=-55,d=4
CH: a=0.02,b=0.2,c=-50,d=2
FS:a=0.1b=0.2c=-65,d=2
LTS:a=0.02,b=0.25,c=-65,d=2
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The model is according to the paper Endothelin Action on Pituitary Lactotrophs: One Receptor, Many GTP-Binding Proteins Figure 1 has been simulated by MathSBML. The figure for the [Ca2+]i and [Ca2+]ER have been normalized in the paper.Original model comes from http://www.math.fsu.edu/~bertram/software/pituitary
The units for parameters and species are varied from one to another, so I omit the unit definition here . Conductances in pS; currents in fA; Ca concentrations in uM; time in ms
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This a model from the article: Which model to use for cortical spiking neurons? Izhikevich, EM Neural Networks, IEEE Transactions on2004:15(5):1063-1070 15484883, Abstract: We discuss the biological plausibility and computational efficiency of some of the most useful models of spiking and bursting neurons. We compare their applicability to large-scale simulations of cortical neural networks.
The model is according to the paperWhich Model to Use for Cortical Spiking Neurons? Figure1(L) integrator has been reproduced by MathSBML. The ODE and the parameters values are taken from the a paper Simple Model of Spiking NeuronsThe original format of the models are encoded in the MATLAB format existed in the ModelDB with Accession number 39948
Figure1 are the simulation results of the same model with different choices of parameters and different stimulus function or events. a=0.02; b=-0.1; c=-55; d=6; V=-60; u=b*V;
This a model from the article: Which model to use for cortical spiking neurons? Izhikevich EM. IEEE Trans Neural Netw. 2004 Sep;15(5):1063-70. 15484883 , Abstract: We discuss the biological plausibility and computational efficiency of some of the most useful models of spiking and bursting neurons. We compare their applicability to large-scale simulations of cortical neural networks.
The model is according to the paper Which Model to Use for Cortical Spiking Neurons? Figure1(N) rebound burst has been reproduced by MathSBML. The ODE and the parameters values are taken from the a paper Simple Model of Spiking Neurons The original format of the models are encoded in the MATLAB format existed in the ModelDB with Accession number 39948
Figure1 are the simulation results of the same model with different choices of parameters and different stimulus function or events. a=0.03; b=0.25; c=-52; d=0;V=-64; u=b*V;
This a model from the article: Which model to use for cortical spiking neurons? Izhikevich EM. IEEE Trans Neural Netw. 2004 Sep;15(5):1063-70. 15484883 , Abstract: We discuss the biological plausibility and computational efficiency of some of the most useful models of spiking and bursting neurons. We compare their applicability to large-scale simulations of cortical neural networks.
The model is according to the paper Which Model to Use for Cortical Spiking Neurons? Figure1(M) rebound spike has been reproduced by MathSBML. The ODE and the parameters values are taken from the a paper Simple Model of Spiking Neurons The original format of the models are encoded in the MATLAB format existed in the ModelDB with Accession number 39948
Figure1 are the simulation results of the same model with different choices of parameters and different stimulus function or events.a=0.03; b=0.25; c=-60; d=4; V=-64; u=b*V;
This a model from the article: Which model to use for cortical spiking neurons? Izhikevich EM. IEEE Trans Neural Netw. 2004 Sep;15(5):1063-70. 15484883 , Abstract: We discuss the biological plausibility and computational efficiency of some of the most useful models of spiking and bursting neurons. We compare their applicability to large-scale simulations of cortical neural networks.
The model is according to the paper Which Model to Use for Cortical Spiking Neurons? Figure1(K) resonator has been reproduced by MathSBML. The ODE and the parameters values are taken from the a paper Simple Model of Spiking Neurons The original format of the models are encoded in the MATLAB format existed in the ModelDB with Accession number 39948
Figure1 are the simulation results of the same model with different choices of parameters and different stimulus function or events. a=0.1; b=0.26; c=-60; d=-1; V=-62; u=b*V;
This a model from the article: Which model to use for cortical spiking neurons? Izhikevich EM. IEEE Trans Neural Netw.2004 Sep;15(5):1063-70. 15484883, Abstract: We discuss the biological plausibility and computational efficiency of some of the most useful models of spiking and bursting neurons. We compare their applicability to large-scale simulations of cortical neural networks.
The model is according to the paperWhich Model to Use for Cortical Spiking Neurons? Figure1(I) spike latency has been reproduced by MathSBML. The ODE and the parameters values are taken from the a paper Simple Model of Spiking NeuronsThe original format of the models are encoded in the MATLAB format existed in the ModelDB with Accession number 39948
Figure1 are the simulation results of the same model with different choices of parameters and different stimulus function or events. In this model a=0.02; b=0.2; c=-65; d=6; V=-70; u=b*V=0.2*(-70);
This a model from the article: Which model to use for cortical spiking neurons? Izhikevich EM. IEEE Trans Neural Netw.2004 Sep;15(5):1063-70. 15484883, Abstract: We discuss the biological plausibility and computational efficiency of some of the most useful models of spiking and bursting neurons. We compare their applicability to large-scale simulations of cortical neural networks.
The model is according to the paperWhich Model to Use for Cortical Spiking Neurons? Figure1(J) subthreshold oscillations has been reproduced by MathSBML. The ODE and the parameters values are taken from the a paper Simple Model of Spiking NeuronsThe original format of the models are encoded in the MATLAB format existed in the ModelDB with Accession number 39948
Figure1 are the simulation results of the same model with different choices of parameters and different stimulus function or events.a=0.05; b=0.26; c=-60; d=0; V=-62; u=b*V;
Model reproduces the various plots in Figure 6 and 7 of the paper. It was successfully tested on MathSBML.
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The model is encoded according to the paper Low dose of dopamine may stimulate prolactin secretion by increasing fast potassium currents Figure5 has been reproduced by MathSBML. One need to change the value of ga in order to get the three correct results.
the xppaut file of the model is avaiable on the following address offered by the author , http://www.math.fsu.edu/%7Ebertram/software/pituitary/JCNS_07.ode
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The model corresponds to the knock out model of beta-/-, epsilon -/- and reproduces the upper panel in Fig 2C. In order to reproduce the other knock out models the transcription rate of the species that are not present must be set to zero and the rate of the one that is present must be set as seven times its corresponding value for the wild type model. This is done so as to compensate for the loss of other isoforms. Model was successfully tested on MathSBML.
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This model corresponds to the IkB-NFkB signaling in wild type cells and reproduces the dynamics of the species as depicted in Figure 2 F of the paper. The authors mention that the simulation is carried out in three phases, where the steady state values of the species in one phase are fed to the succeding phase. This model captures the simulation dynamics of two phases and makes use of the event section to introduce the stimulus and thereby transition to the next phase. Accordingly, a few terms have been introduced that make this transition possible, this in no way compromises the original model. Also, the simulation plots are not an exact reproduction of the figures in the paper, they do however match the simulation results that the authors shared with us. Model was successfully tested on MathSBML.
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This a model from the article: Which model to use for cortical spiking neurons? Izhikevich EM. IEEE Trans Neural Netw.2004 Sep;15(5):1063-70. 15484883, Abstract: We discuss the biological plausibility and computational efficiency of some of the most useful models of spiking and bursting neurons. We compare their applicability to large-scale simulations of cortical neural networks.
The model is according to the paperWhich Model to Use for Cortical Spiking Neurons? Figure1(G) Class 1 excitable has been reproduced by MathSBML. The ODE and the parameters values are originally taken from the a paper Simple Model of Spiking NeuronsThe original format of the models are encoded in the MATLAB format existed in the ModelDB with Accession number 39948
Figure1 are the simulation results of the same model with different choices of parameters and different stimulus function or events.a=0.02; b=-0.1; c=-55; d=6; V=-60; u=b*V;
This a model from the article: Which model to use for cortical spiking neurons? Izhikevich EM. IEEE Trans Neural Netw.2004 Sep;15(5):1063-70. 15484883, Abstract: We discuss the biological plausibility and computational efficiency of some of the most useful models of spiking and bursting neurons. We compare their applicability to large-scale simulations of cortical neural networks.
The model is according to the paperWhich Model to Use for Cortical Spiking Neurons? Figure1(H) Class 2 excitable has been reproduced by MathSBML. The ODE and the parameters values are taken from the a paper Simple Model of Spiking NeuronsThe original format of the models are encoded in the MATLAB format existed in the ModelDB with Accession number 39948
Figure1 are the simulation results of the same model with different choices of parameters and different stimulus function or events.a=0.2; b=0.26; c=-65; d=0; V=-64; u=b*V;
We present a two-compartment model to explain the oscillatory behavior observed experimentally in activated neutrophils. Our model is based mainly on the peroxidase-oxidase reaction catalyzed by myeloperoxidase with melatonin as a cofactor and NADPH oxidase, a major protein in the phagosome membrane of the leukocyte. The model predicts that after activation of a neutrophil, an increase in the activity of the hexose monophosphate shunt and the delivery of myeloperoxidase into the phagosome results in oscillations in oxygen and NAD(P)H concentration. The period of oscillation changes from >200 s to 10-30 s. The model is consistent with previously reported oscillations in cell metabolism and oxidant production. Key features and predictions of the model were confirmed experimentally. The requirement of the hexose monophosphate pathway for 10 s oscillations was verified using 6-aminonicotinamide and dexamethasone, which are inhibitors of glucose-6-phosphate dehydrogenase. The role of the NADPH oxidase in promoting oscillations was confirmed by dose-response studies of the effect of diphenylene iodonium, an inhibitor of the NADPH oxidase. Moreover, the model predicted an increase in the amplitude of NADPH oscillations in the presence of melatonin, which was confirmed experimentally. Successful computer modeling of complex chemical dynamics within cells and their chemical perturbation will enhance our ability to identify new antiinflammatory compounds.
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This is the Dynamical model of nuclear division cycles during early embryogenesis of Drosophila, without StringT regulation. so ksstg=kdstg=0. Figure1B has been simulated by MathSBML. Curator changed model from only one compartment into two compartments according to the paper. Detail explaination of the models are in the supplement information of the paper.The author didn't specify which compartment Xm, Stgm, Xp are located, we assume that they locate in cytoplasm.
Some of the parameter values for the equations are dimensionless parameters.
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Wang2007 - ATP induced intracellular Calicum Oscillation
The model simulate the ATP-induced intracellular Ca2+ oscillations and the quantitative effect of ATP concentration on the oscillation characteristics such as the duration, peak concentration of intracellular Ca2+ and average interval.
A quantitative kinetic model is proposed to simulate the ATP-induced intracellular Ca(2+) oscillations. The quantitative effect of ATP concentration upon the oscillations was successfully simulated. Our simulation results support previous experimental explanations that the Ca(2+) oscillations are mainly due to interaction of Ca(2+) release from the endoplasmic reticulum (ER) and the ATP-dependent Ca(2+) pump back into the ER, and the oscillations are prolonged by extracellular Ca(2+) entry that maintains the constant Ca(2+) supplies to its intracellular stores. The model is also able to simulate the sudden disappearance phenomenon of the Ca(2+) oscillations observed in some cell types by taking into account of the biphasic characteristic of the Ca(2+) release from the endoplasmic reticulum (ER). Moreover, the model simulation results for the Ca(2+) oscillations characteristics such as duration, peak [Ca(2+)](cyt), and average interval, etc., lead to prediction of some possible factors responsible for the variations of Ca(2+) oscillations in different types of cells.
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Figure4 and Figure5 can be simulated by Copasi. Figure4 can be simulated in MathSBML as well. There are some typos in the paper:K29=234, is it should k_29; Table2, reaction17, is there are \"slash\" missing in between the rate equation; reaction 33,\"Akt-PI-PP\" in the last term of denominator instead of \"AktPI-P\" . For plotting figure4, we create another extra parameter *_percent, and use assignment rule calculate percentage of each species.
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O'Dea, E.L., Barken, D., Peralta, R.Q., Tran K.T., Werner, S.L., Kearns, J.D., Levchenko, A., Hoffmann, A. A homeostatic model of IkB metabolism to control constitutive activity. Molecular Systems Biology, 3:111, pp. 1-7. 2007
Questions concerning the paper should be addressed to the corresponding author. Alexander Hoffmann (ahoffmann@ucsd.edu)
The original model was written and simulated within MathWorks MatLab 2006a using the ode15s (stiff/NDF) solver. It is highly recommended that those wanting to model this system use the MatLab version which we will freely provide upon request. As always, simulation results vary according to the numerical solver used.
Translation to SBML Level 2.1 was performed via reconstruction of the model within MathWorks SimBiology Desktop (version 2.1) followed by an Export to SBML. Please address questions about this SBML model to Jeff Kearns (jkearns@ucsd.edu).
BioModels DB curation: The model reproduces the values of diffferent species depicted in Fig 3A and 3B (wt) of the paper corresponding to Model1.1. To depict the the total IkB alpha, beta epsilon species, three additional parameters and their corresponding assignment rules have been introduced in this model by the creator. Model succesfully tested on MathSBML.
This a model from the article: Mathematical model predicts a critical role for osteoclast autocrine regulation in the control of bone remodeling. Komarova SV, Smith RJ, Dixon SJ, Sims SM, Wahl LM Bone2003 Aug;33(2):206-15 14499354, Abstract: Bone remodeling occurs asynchronously at multiple sites in the adult skeleton and involves resorption by osteoclasts, followed by formation of new bone by osteoblasts. Disruptions in bone remodeling contribute to the pathogenesis of disorderssuch as osteoporosis, osteoarthritis, and Paget's disease. Interactions among cells of osteoblast and osteoclast lineages are critical in the regulation of bone remodeling. We constructed a mathematical model of autocrine and paracrine interactions among osteoblasts and osteoclasts that allowed us to calculate cell population dynamics and changes in bone mass at a discrete site of bone remodeling. Themodel predicted different modes of dynamic behavior: a single remodeling cycle in response to an external stimulus, a series of internally regulated cycles of bone remodeling, or unstable behavior similar to pathological bone remodeling in Paget's disease. Parametric analysis demonstrated that the mode of dynamic behaviorin the system depends strongly on the regulation of osteoclasts by autocrine factors, such as transforming growth factor beta. Moreover, simulations demonstratedthat nonlinear dynamics of the system may explain the differing effects of immunosuppressants on bone remodeling in vitro and in vivo. In conclusion, the mathematical model revealed that interactions among osteoblasts and osteoclasts result in complex, nonlinear system behavior, which cannot be deduced from studies of each cell type alone. The model will be useful in future studies assessing the impact of cytokines, growth factors, and potential therapies on the overall process ofremodeling in normal bone and in pathological conditions such as osteoporosis and Paget's disease.
The model reproduces Fig 2A and Fig 2B of the paper. Note that the Y-axis scale is not right, the osteoblast steadystate is approximatley 212 and not 0 as depicted in the figure. Also, there is atypo in the equation for x2_bar which has been corrected here. Model successfully tested on MathSBML.
Experimental studies have shown that both Wnt and the MAPK pathways are involved in the pathogenesis of various kinds of cancers (eg. colorectal cancer). The crosstalk between the two pathways have also been identified. Here, Kim et al., (2007) have integrated the experimental evidences on crosstalk mechanisms between the two pathways into a pathway model, and have identified the existence of a hidden positive feedback loop and suggest that this positive feedback loop might participate in the pathogenesis of colorectal cancer.
The Wnt and the extracellular signal regulated-kinase (ERK) pathways are both involved in the pathogenesis of various kinds of cancers. Recently, the existence of crosstalk between Wnt and ERK pathways was reported. Gathering all reported results, we have discovered a positive feedback loop embedded in the crosstalk between the Wnt and ERK pathways. We have developed a plausible model that represents the role of this hidden positive feedback loop in the Wnt/ERK pathway crosstalk based on the integration of experimental reports and employing established basic mathematical models of each pathway. Our analysis shows that the positive feedback loop can generate bistability in both the Wnt and ERK signaling pathways, and this prediction was further validated by experiments. In particular, using the commonly accepted assumption that mutations in signaling proteins contribute to cancerogenesis, we have found two conditions through which mutations could evoke an irreversible response leading to a sustained activation of both pathways. One condition is enhanced production of beta-catenin, the other is a reduction of the velocity of MAP kinase phosphatase(s). This enables that high activities of Wnt and ERK pathways are maintained even without a persistent extracellular signal. Thus, our study adds a novel aspect to the molecular mechanisms of carcinogenesis by showing that mutational changes in individual proteins can cause fundamental functional changes well beyond the pathway they function in by a positive feedback loop embedded in crosstalk. Thus, crosstalk between signaling pathways provides a vehicle through which mutations of individual components can affect properties of the system at a larger scale.
Figure 6 of the reference publication has been reproduced. The model as such reproduces the plots corresponding to the normal conditions. To obtain simulations under 1) beta-cataenin mutation; set V12=0.846 (two-fold of the beta-catenin synthetic rate than the normal system. i.e. 2*0.426), 2) PP2A mutation; set Vmax4=Vmax5=33.75 (three-fourths of the PP2A activity that the normal system. i.e. (3/4)*45). The simulation was performed using Copasi 4.10 (Build 55).
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Notes from the original DOCQS curator: In this version of the CDK2/Cyclin A complex activation there is discrepancy in the first curve which plots the binding reaction of CDK2 and Cyclin A expressed in E. coli. With the published rate constants the simulation does not match the published graph (Fig.1B) in Morris MC. et al. J Biol Chem. 277(26):23847-53 .
Notes from BioModels DB curator: Although the parameters are those reported in the table I for CDK2/Cyclin A, the total fluorescence follows exactly the curve reported in the paper for CDK2/Cyclin H in figure 1B. Either the plot legend or the table is wrong.
The model reproduces Fig 2 , Fig3A and Fig 3B of the paper. The ODE for x1(gp180) and x3 (gp 130) is wrong and the authors have communicated to the curator that the species ought to have a constant value. There are a few other differences from the paper and these were made in consultation with the authors. Model was successfully tested on MathSBML.
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To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
In summary, you are entitled to use this encoded model in absolutely any manner you deem suitable, verbatim, or with modification, alone or embedded it in a larger context, redistribute it, commercially or not, in a restricted way or not.
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The model reproduces Fig 6B of the paper for model 3. The model was reproduced using XPP.
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The model reproduces Fig 6B of the paper for model 6. The model was reproduced using XPP.
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The model reproduces time profile of p53 and Mdm2 as depicted in Fig 6B of the paper for Model 5. Results obtained using MathSBML.
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The model reproduces time profile of p53 and Mdm2 as depicted in Fig 6B of the paper for Model 4. Results obtained using MathSBML.
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The model reproduces time profile of p53 and Mdm2 as depicted in Fig 6B of the paper for Model 2. Results obtained using MathSBML.
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The model reproduces the time profile of p53 and Mdm2 as depicted in Fig 6B of the plot for model 1. Results obtained on MathSBML.
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The model reproduces the oscillations for mRNA and protein species as depicted in Fig 3 of the plot. The model differs slightly from that given in the paper and this was made after a communication from the authors. The values of parameters tcvriclkp, tcdvpmt and dccpt are slightly different. Also, although it is not given in the paper, rate laws for reactions re20, re28, re35, re42, re43 and re45 are multiplied by a specie. Model was successfully tested on MathSBML
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The model reproduces the time profiles of Golgi Ras-GTP and plasma membrane Ras-GTP, subjected to a palmitoylation rate of 0.00015849 second inverse. This is depicted in Fig 5a and 5b for various palmitolylation rates, however the value used in this model is not present in the figure in the paper but corresponds to Fig S2 of the supplement. Model successfully reproduced using MathSBML. Please note that the units of volumetric species in this model are molecules/micrometer cubed, to convert this to microMolar as given in the paper, multiply the simulation result by 1/602.
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The model reproduces the time profiles of Calcium in the spine and dendrites as depicted in Fig 8 and Fig 9 of the paper for CF activation.
The model was reproduced using MathSBML.
Please note that the units of volume species is molecules/micrometer cubed as against the units of microMolar given in the paper. To convert the units to microMolar multiply the species concentration by the conversion factor 1/602.
The model reproduces the time profiles of Total Smad2 in the nucleus as well as the cytoplasm as depicted in 2D and also the other time profiles as depicted in Fig 2. Two parameters that are not present in the paper are introduced here for illustration purposes and they are Total Smad2n and Total Smad2c. The term kr_EE*LRC_EE has not been included in the ODE's for T1R_surf, T2R_surf and TGFbeta in the paper but is included in this model. MathSBML was used to reproduce the simulation result.
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The model reproduces the compartmental model for Ran transport as depicted in Fig 3 of the paper. Model reproduced using MathSBML.
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The model reproduces Fig 2B of the paper. Model successfully tested on MathSBML
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This a model from the article: A theoretical study on activation of transcription factor modulated by intracellular Ca2+ oscillations. Zhu CL, Zheng Y, Jia Y Biophys. Chem.[2007 Aug:129(1):49-55 17560007, Abstract: This work presents both deterministic and stochastic models of genetic expression modulated by intracellular calcium (Ca2+) oscillations, based on macroscopic differential equations and chemical Langevin equations, respectively. In deterministic case, the oscillations of intracellular Ca2+ decrease the effective Ca2+ threshold for the activation of transcriptional activator (TF-A). The average activation of TF-A increases with the increase of the average amplitude of intracellular Ca2+ oscillations, but decreases with the increase of the period of intracellular Ca2+ oscillations, which are qualitatively consistent with the experimental results on the gene expression in lymphocytes. In stochastic case, it is found that a large internal fluctuation of the biochemical reaction can enhance gene expression efficiency specifically at a low level of external stimulations or at a small rate of TF-A dimer phosphorylation activated by Ca2+, which reduces the threshold of the average intracellular Ca2+ concentration for gene expression.
The model reproduces Fig 2B of the paper. Model successfully reproduced using MathSBML.
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The model reproduces the time profiles of the different species depicted in Fig 3a of the paper. Model successfully reproduced using MathSBML.
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The model reproduces the time profiles of p27, E2F and aE/cdk2 as depicted in Figure 5 c of the paper. Model was simulated on MathSBML.
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This model was created after the article by Leloup and Goldbeter, J Biol Rhythms 1998, Vol:13(1),pp70-87, pubmedID: 9486845 A Model for Circadian Rhythms in Drosophila Incorporating the Formation of a Complex between the PER and TIM Proteins The parameters and initial concentrations are taken to reproduce figs. 4 D,E,F in the publication. For a simulation without light dependent degradation of TIM_pp, change the the parameter v_dT_fac to 1. The light/dark phases length can be set using the parameter l_d .
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from: Schemes of fluc control in a model of Saccharomyces cerevisiae glycolysis
Pritchard, L and Kell, DBEur. J. Biochem. 269(2002), 3894-3904. It represents a modified version of Teusink et al.Eur. J. Biochem. 267(2000), 5313-5329. The model is a translation from the GEPASI file encoded by Leighton Pritchard. This version uses the Vmaxes found by the best fit (R1) of Table 1 of the \tPritchard and Kell paper and simulates a decrease of external glucose concentration from 100 to 2 mM. To reproduce the values in table 2 of the publication, set GLCo to 50 mM and compute the steady state.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
In summary, you are entitled to use this encoded model in absolutely any manner you deem suitable, verbatim, or with modification, alone or embedded it in a larger context, redistribute it, commercially or not, in a restricted way or not.
This sbml file describes the RECI model from: \t \"Mathematical modeling identifies Smad nucleocytoplasmic shuttling as a dynamic signal-interpreting system\" by Bernhard Schmierer, Alexander L. Tournier, Paul A. Bates and Caroline S. Hill, Proc Natl Acad Sci U S A. 2008 May 6;105(18):6608-13. \t All parameter and species names are as in Figure S3 of the original publication. The original model was done in copasi. SB-431542 addition to a concentration of 10000 nM is set at 2700 sec. The initial concentration of SB, the time point of addition and the final concentration can be set by altering the parameters SB_0, t_SB and SB_end. This model file has been used to reproduce Figures 2D and 5A from the research paper using SBMLodesolver. To get the results for the figures, sum the corresponding concentrations: fig 2D: nuclear EGFP-Smad2 = G_n + pG_n + G2_n + G4_n + 2* GG_n fig 5A (either n or c for nucleus or cytosol): monomeric Smad2 = S2_n/c + G_n/c monomeric P-Smad2 = pS2_n/c + pG_n/c Smad2/Smad4 complexes = S24_n/c + G4_n/c Smad2/Smad2 complexes = S22_n/c + G2_n/c + GG_n/c
Membrane identity and GTPase cascades regulated by toggle and cut-out switches \t Perla Del Conte-Zerial, Lutz Brusch, Jochen C Rink, Claudio Collinet, Yannis Kalaidzidis, Marino Zerial, and Andreas Deutsch: Molecular Systems Biology4:206 15 July 2008, doi:10.1038/msb.2008.45
This is the cut-out switch model for the Rab5 - Rab7 transition, also referred to as model 2 in the original publication. This model is not completely described in all details in the publication. Thanks go to Barbara Szomolay and Lutz Brusch for finding and clarifying this. According to Dr. Brusch this model represents the mechanism identified by the qualitative analysis in the article in the scenario deemed most useful by the authors. For the time-course simulations it was necessary to add a time dependency to one of the parameters, which is only verbally described in the article. As argued in the publication the switch between early and late endosomes can be triggered by a parameter change. While with fixed parameter values each switch just converges to one steady state from its initial conditions and stays there, endosomes should switch between two different states. These changes would in reality of course depend on many different factors, such as cargo composition and amount in the specific endosome, its location and some additional cellular control mechanisms and encompass many different parameters. To keep the model simple the authors chose to add a time dependency to only one reaction - ke in the activation of RAB5 is multiplied with a term monotonously increasing over time from 0 to 1. They also hard coded a time dependence in this term, 100 minutes, to make the switch occur after several hundred minutes. As long as this modulating term remains monotonic all resulting time courses should look similar, with the switching behavior depending on the initial conditions and whether the term is increasing or decreasing. Monotonic increase is a reasonable assumption for the described mechanism of cargo accumulation. Not explicitly described in the article:activation of Rab5 (time) : r*ke*time/(100+time) /(1+e(kg-R)*kf) instead of r*ke/(1+e(kg-R)*kf)
This a model from the article: Increased glycolytic flux as an outcome of whole-genome duplication in yeast. Conant GC, Wolfe KH Mol. Syst. Biol. [2007 ; Volume: 3 (Issue: )]: 129 17667951 , Abstract: After whole-genome duplication (WGD), deletions return most loci to single copy. However, duplicate loci may survive through selection for increased dosage. Here, we show how the WGD increased copy number of some glycolytic genes could have conferred an almost immediate selective advantage to an ancestor of Saccharomyces cerevisiae, providing a rationale for the success of the WGD. We propose that the loss of other redundant genes throughout the genome resulted in incremental dosage increases for the surviving duplicated glycolytic genes. This increase gave post-WGD yeasts a growth advantage through rapid glucose fermentation; one of this lineage's many adaptations to glucose-rich environments. Our hypothesis is supported by data from enzyme kinetics and comparative genomics. Because changes in gene dosage follow directly from post-WGD deletions, dosage selection can confer an almost instantaneous benefit after WGD, unlike neofunctionalization or subfunctionalization, which require specific mutations. We also show theoretically that increased fermentative capacity is of greatest advantage when glucose resources are both large and dense, an observation potentially related to the appearance of angiosperms around the time of WGD.
The original model submitted by the authors was slightly altered and now comprises the models originally submitted as MODEL2426780967, MODEL2427021978, MODEL2427095802. It reproduces figures 2A,3A and 3B from the publication.
This model uses the glycolysis model from Pritchard and Kell (2002) with an additional parameter, WGD_E , to adjust for the differing enzyme conzentrations before the whole genome duplication (WGD) and parameters fV_xxx that adjust the Vmax of the different reactions (xxx eg. HXT or PYK). Figure 3A from the article can be reproduced by changing the value of the parameters fV_xxx to 0.9 indiviually, with xxx signifying the different enzymes (HXT, HXK ...) Figure 3B from the publication can be reproduced by setting the parameter WGD_E to 0.75 and individually setting the parameters fV_xxx to 1.333. To reproduce figure 2A from the article change the parameter WGD_E in the range between 0.65 and 1.0.
This a model from the article: Increased glycolytic flux as an outcome of whole-genome duplication in yeast. Conant GC, Wolfe KH Mol. Syst. Biol. [2007 ; Volume: 3 (Issue: )]: 129 17667951 , Abstract: After whole-genome duplication (WGD), deletions return most loci to single copy. However, duplicate loci may survive through selection for increased dosage. Here, we show how the WGD increased copy number of some glycolytic genes could have conferred an almost immediate selective advantage to an ancestor of Saccharomyces cerevisiae, providing a rationale for the success of the WGD. We propose that the loss of other redundant genes throughout the genome resulted in incremental dosage increases for the surviving duplicated glycolytic genes. This increase gave post-WGD yeasts a growth advantage through rapid glucose fermentation; one of this lineage's many adaptations to glucose-rich environments. Our hypothesis is supported by data from enzyme kinetics and comparative genomics. Because changes in gene dosage follow directly from post-WGD deletions, dosage selection can confer an almost instantaneous benefit after WGD, unlike neofunctionalization or subfunctionalization, which require specific mutations. We also show theoretically that increased fermentative capacity is of greatest advantage when glucose resources are both large and dense, an observation potentially related to the appearance of angiosperms around the time of WGD.
This model reproduces fig. 2C from the corrigendum to the publication The parameter Vmax_PDH was corrected by a factor 60 from 6.32 mM/min in the publication to 379.2 mM/min in accordance with the authors. see the corrigendum at msb or its pubmed entry (pmid:18594520)
This model comprises the glycolysis model from Pritchard and Kell (2002) with an extension for the metabolisation of pyruvate in the mitochondria by pyruvate dehydrogenase and an additional parameter, WGD_E , to adjust for the differing enzyme concentrations before the whole genome duplication (WGD). To switch off transport of pyruvate to the mitochondria, set the parameter t_m = 0. Figure 2C from the article can be reproduced by manually changing the value of parameter WGD_E in the range between 0.65 and 1.0 and calculating the ratios of ratio of PDC/PDH fluxes in the altered model to the one of the model with WGD_E = 1.
The onset of paralysis of skeletal muscles induced by BoNT/A at the isolated rat neuromuscular junction is described in this model. This model is the extended model of\u00a0BIOMD0000000267, which itself is the reduced form of the model developed by Simpson 1980; PMID\u00a06243359
Experimental studies have demonstrated that botulinum neurotoxin serotype A (BoNT/A) causes flaccid paralysis by a multi-step mechanism. Following its binding to specific receptors at peripheral cholinergic nerve endings, BoNT/A is internalized by receptor-mediated endocytosis. Subsequently its zinc-dependent catalytic domain translocates into the neuroplasm where it cleaves a vesicle-docking protein, SNAP-25, to block neurally evoked cholinergic neurotransmission. We tested the hypothesis that mathematical models having a minimal number of reactions and reactants can simulate published data concerning the onset of paralysis of skeletal muscles induced by BoNT/A at the isolated rat neuromuscular junction (NMJ) and in other systems. Experimental data from several laboratories were simulated with two different models that were represented by sets of coupled, first-order differential equations. In this study, the 3-step sequential model developed by Simpson (J Pharmacol Exp Ther 212:16-21,1980) was used to estimate upper limits of the times during which anti-toxins and other impermeable inhibitors of BoNT/A can exert an effect. The experimentally determined binding reaction rate was verified to be consistent with published estimates for the rate constants for BoNT/A binding to and dissociating from its receptors. Because this 3-step model was not designed to reproduce temporal changes in paralysis with different toxin concentrations, a new BoNT/A species and rate (k(S)) were added at the beginning of the reaction sequence to create a 4-step scheme. This unbound initial species is transformed at a rate determined by k(S) to a free species that is capable of binding. By systematically adjusting the values of k(S), the 4-step model simulated the rapid decline in NMJ function (k(S) >or= 0.01), the less rapid onset of paralysis in mice following i.m. injections (k (S) = 0.001), and the slow onset of the therapeutic effects of BoNT/A (k(S) < 0.001) in man. This minimal modeling approach was not only verified by simulating experimental results, it helped to quantitatively define the time available for an inhibitor to have some effect (t(inhib)) and the relation between this time and the rate of paralysis onset. The 4-step model predicted that as the rate of paralysis becomes slower, the estimated upper limits of (t(inhib)) for impermeable inhibitors become longer. More generally, this modeling approach may be useful in studying the kinetics of other toxins or viruses that invade host cells by similar mechanisms, e.g., receptor-mediated endocytosis.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
This model is from the article: Interlinked mutual inhibitory positive feedbacks induce robust cellular memory effects. Kim TH, Jung SH, Cho KH FEBS Lett.2007 Oct; 581(25) 17892872, Abstract: Mutual inhibitory positive feedback (MIPF), or double-negative feedback, is a key regulatory motif of cellular memory with the capability of maintaining switched states for transient stimuli. Such MIPFs are found in various biological systems where they are interlinked in many cases despite a single MIPF can still realize such a memory effect. An intriguing question then arises about the advantage of interlinking MIPFs instead of exploiting an isolated single MIPF to realize the memory effect. We have investigated the advantages of interlinked MIPF systems through mathematical modeling and computer simulations. Our results revealed that interlinking MIPFs expands the parameter range of achieving the memory effect, or the memory region, thereby making the system more robust to parameter perturbations. Moreover, the minimal duration and amplitude of an external stimulus required for off-to-on state transition are increased and, as a result, external noises can more effectively be filtered out. Hence, interlinked MIPF systems can realize more robust cellular memories with respect to both parameter perturbations and external noises. Our study suggests that interlinked MIPF systems might be an evolutionary consequence acquired for a more reliable memory effect by enhancing robustness against noisy cellular environments.
Note: The model reproduces the simulation result for an asymmetric model as depicted in Fig 3G of the paper. Model successfully tested on MathSBML
This model is from the article: Interlinked mutual inhibitory positive feedbacks induce robust cellular memory effects. Kim TH, Jung SH, Cho KH FEBS Lett.2007 Oct; 581(25) 17892872, Abstract: Mutual inhibitory positive feedback (MIPF), or double-negative feedback, is a key regulatory motif of cellular memory with the capability of maintaining switched states for transient stimuli. Such MIPFs are found in various biological systems where they are interlinked in many cases despite a single MIPF can still realize such a memory effect. An intriguing question then arises about the advantage of interlinking MIPFs instead of exploiting an isolated single MIPF to realize the memory effect. We have investigated the advantages of interlinked MIPF systems through mathematical modeling and computer simulations. Our results revealed that interlinking MIPFs expands the parameter range of achieving the memory effect, or the memory region, thereby making the system more robust to parameter perturbations. Moreover, the minimal duration and amplitude of an external stimulus required for off-to-on state transition are increased and, as a result, external noises can more effectively be filtered out. Hence, interlinked MIPF systems can realize more robust cellular memories with respect to both parameter perturbations and external noises. Our study suggests that interlinked MIPF systems might be an evolutionary consequence acquired for a more reliable memory effect by enhancing robustness against noisy cellular environments.
Note: The model reproduces the simulation result for the symmetric model as depicted in Fig 3H of the paper. Model successfully tested on MathSBML
The model reproduces the time profile of species depicted in Figure 12a and 12 b. The authors communicated to the curator that there is a typo in the paper, the values of kd1 and kd2 are reversed. Model successfully reproduced using MathSBML.
Neves2008 - Role of cell shape and size in controlling intracellular signalling
The role of cell shape and size in the flow of spatial information from the cell surface receptor to downstream components within the cell has been studied on the \u03b2-adrenergic receptor to MAPK-signalling network.
Neves SR, Tsokas P, Sarkar A, Grace EA, Rangamani P, Taubenfeld SM, Alberini CM, Schaff JC, Blitzer RD, Moraru II, Iyengar R
Cell. 2008, 133(4):666-680
Abstract:
The role of cell size and shape in controlling local intracellular signaling reactions, and how this spatial information originates and is propagated, is not well understood. We have used partial differential equations to model the flow of spatial information from the beta-adrenergic receptor to MAPK1,2 through the cAMP/PKA/B-Raf/MAPK1,2 network in neurons using real geometries. The numerical simulations indicated that cell shape controls the dynamics of local biochemical activity of signal-modulated negative regulators, such as phosphodiesterases and protein phosphatases within regulatory loops to determine the size of microdomains of activated signaling components. The model prediction that negative regulators control the flow of spatial information to downstream components was verified experimentally in rat hippocampal slices. These results suggest a mechanism by which cellular geometry, the presence of regulatory loops with negative regulators, and key reaction rates all together control spatial information transfer and microdomain characteristics within cells.
To the extent possible under law, all copyright and related orneighbouring rights to this encoded model have been dedicated to the publicdomain worldwide. Please refer to CC0 Public DomainDedication for more information.
An allosteric model for calmodulin activation, in which binding to calcium facilitates the transition between a low-affinity [tense (T)] and a high-affinity [relaxed (R)] state.
Proc. Natl. Acad. Sci. U.S.A. 2008 Aug; 105(31): 10768-10773
\t
Abstract:
\t
\t
Calmodulin plays a vital role in mediating bidirectional synaptic plasticity by activating either calcium/calmodulin-dependent protein kinase II (CaMKII) or protein phosphatase 2B (PP2B) at different calcium concentrations. We propose an allosteric model for calmodulin activation, in which binding to calcium facilitates the transition between a low-affinity [tense (T)] and a high-affinity [relaxed (R)] state. The four calcium-binding sites are assumed to be nonidentical. The model is consistent with previously reported experimental data for calcium binding to calmodulin. It also accounts for known properties of calmodulin that have been difficult to model so far, including the activity of nonsaturated forms of calmodulin (we predict the existence of open conformations in the absence of calcium), an increase in calcium affinity once calmodulin is bound to a target, and the differential activation of CaMKII and PP2B depending on calcium concentration.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
The model reproduces the time profile of cytoplasmic Calcium as depicted in Fig 3 of the paper. Model successfully reproduced using Jarnac and MathSBML.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
In summary, you are entitled to use this encoded model in absolutely any manner you deem suitable, verbatim, or with modification, alone or embedded it in a larger context, redistribute it, commercially or not, in a restricted way or not.
The model reproduces Fig 2A of the paper. Model successfully reproduced using Jarnac and MathSBML.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
In summary, you are entitled to use this encoded model in absolutely any manner you deem suitable, verbatim, or with modification, alone or embedded it in a larger context, redistribute it, commercially or not, in a restricted way or not.
The Mitotic Spindle Assembly Checkpoint ((M)SAC) is an evolutionary conserved mechanism. This model incorporates the perspectives of three central control pathways, namely Mad1/Mad2 induced Cdc20 sequestering based on the Template Model, MCC formation, and APC inhibition. MCC:APC dissociation is described by two alternatives models, namely the \"Dissociation\" and the \"Convey\" model variants. Both these model are available in BioModels Database. This model corresponds to the \"Dissociation\" variant.
BACKGROUND: The Mitotic Spindle Assembly Checkpoint ((M)SAC) is an evolutionary conserved mechanism that ensures the correct segregation of chromosomes by restraining cell cycle progression from entering anaphase until all chromosomes have made proper bipolar attachments to the mitotic spindle. Its malfunction can lead to cancer.
PRINCIPLE FINDINGS: We have constructed and validated for the human (M)SAC mechanism an in silico dynamical model, integrating 11 proteins and complexes. The model incorporates the perspectives of three central control pathways, namely Mad1/Mad2 induced Cdc20 sequestering based on the Template Model, MCC formation, and APC inhibition. Originating from the biochemical reactions for the underlying molecular processes, non-linear ordinary differential equations for the concentrations of 11 proteins and complexes of the (M)SAC are derived. Most of the kinetic constants are taken from literature, the remaining four unknown parameters are derived by an evolutionary optimization procedure for an objective function describing the dynamics of the APC:Cdc20 complex. MCC:APC dissociation is described by two alternatives, namely the \"Dissociation\" and the \"Convey\" model variants. The attachment of the kinetochore to microtubuli is simulated by a switching parameter silencing those reactions which are stopped by the attachment. For both, the Dissociation and the Convey variants, we compare two different scenarios concerning the microtubule attachment dependent control of the dissociation reaction. Our model is validated by simulation of ten perturbation experiments.
CONCLUSION: Only in the controlled case, our models show (M)SAC behaviour at meta- to anaphase transition in agreement with experimental observations. Our simulations revealed that for (M)SAC activation, Cdc20 is not fully sequestered; instead APC is inhibited by MCC binding.
This model describes the controlled dissociation variant of the mitotic spindle assembly checkpoint. If the tool you use has problems with events, you can uncomment the assignment rules for u and u_prime and comment out the list of events.
In accordance with the authors due to typos in the original publication some initial conditions and parameters were slightly changed in the model:
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
The Mitotic Spindle Assembly Checkpoint ((M)SAC) is an evolutionary conserved mechanism. This model incorporates the perspectives of three central control pathways, namely Mad1/Mad2 induced Cdc20 sequestering based on the Template Model, MCC formation, and APC inhibition. MCC:APC dissociation is described by two alternatives models, namely the \"Dissociation\" and the \"Convey\" model variants. Both these model are available in BioModels Database. This model corresponds to the \"Convey\" variant.
BACKGROUND: The Mitotic Spindle Assembly Checkpoint ((M)SAC) is an evolutionary conserved mechanism that ensures the correct segregation of chromosomes by restraining cell cycle progression from entering anaphase until all chromosomes have made proper bipolar attachments to the mitotic spindle. Its malfunction can lead to cancer.
PRINCIPLE FINDINGS: We have constructed and validated for the human (M)SAC mechanism an in silico dynamical model, integrating 11 proteins and complexes. The model incorporates the perspectives of three central control pathways, namely Mad1/Mad2 induced Cdc20 sequestering based on the Template Model, MCC formation, and APC inhibition. Originating from the biochemical reactions for the underlying molecular processes, non-linear ordinary differential equations for the concentrations of 11 proteins and complexes of the (M)SAC are derived. Most of the kinetic constants are taken from literature, the remaining four unknown parameters are derived by an evolutionary optimization procedure for an objective function describing the dynamics of the APC:Cdc20 complex. MCC:APC dissociation is described by two alternatives, namely the \"Dissociation\" and the \"Convey\" model variants. The attachment of the kinetochore to microtubuli is simulated by a switching parameter silencing those reactions which are stopped by the attachment. For both, the Dissociation and the Convey variants, we compare two different scenarios concerning the microtubule attachment dependent control of the dissociation reaction. Our model is validated by simulation of ten perturbation experiments.
CONCLUSION: Only in the controlled case, our models show (M)SAC behaviour at meta- to anaphase transition in agreement with experimental observations. Our simulations revealed that for (M)SAC activation, Cdc20 is not fully sequestered; instead APC is inhibited by MCC binding.
This model describes the controlled dissociation variant of the mitotic spindle assembly checkpoint. If the tool you use has problems with events, you can uncomment the assignment rules for u and u_prime and comment out the list of events.
In accordance with the authors due to typos in the original publication some initial conditions and parameters were slightly changed in the model:
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
BACKGROUND: In individual living cells p53 has been found to be expressed in a series of discrete pulses after DNA damage. Its negative regulator Mdm2 also demonstrates oscillatory behaviour. Attempts have been made recently to explain this behaviour by mathematical models but these have not addressed explicit molecular mechanisms. We describe two stochastic mechanistic models of the p53/Mdm2 circuit and show that sustained oscillations result directly from the key biological features, without assuming complicated mathematical functions or requiring more than one feedback loop. Each model examines a different mechanism for providing a negative feedback loop which results in p53 activation after DNA damage. The first model (ARF model) looks at the mechanism of p14ARF which sequesters Mdm2 and leads to stabilisation of p53. The second model (ATM model) examines the mechanism of ATM activation which leads to phosphorylation of both p53 and Mdm2 and increased degradation of Mdm2, which again results in p53 stabilisation. The models can readily be modified as further information becomes available, and linked to other models of cellular ageing. RESULTS: The ARF model is robust to changes in its parameters and predicts undamped oscillations after DNA damage so long as the signal persists. It also predicts that if there is a gradual accumulation of DNA damage, such as may occur in ageing, oscillations break out once a threshold level of damage is acquired. The ATM model requires an additional step for p53 synthesis for sustained oscillations to develop. The ATM model shows much more variability in the oscillatory behaviour and this variability is observed over a wide range of parameter values. This may account for the large variability seen in the experimental data which so far has examined ARF negative cells. CONCLUSION: The models predict more regular oscillations if ARF is present and suggest the need for further experiments in ARF positive cells to test these predictions. Our work illustrates the importance of systems biology approaches to understanding the complex role of p53 in both ageing and cancer.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
BACKGROUND: In individual living cells p53 has been found to be expressed in a series of discrete pulses after DNA damage. Its negative regulator Mdm2 also demonstrates oscillatory behaviour. Attempts have been made recently to explain this behaviour by mathematical models but these have not addressed explicit molecular mechanisms. We describe two stochastic mechanistic models of the p53/Mdm2 circuit and show that sustained oscillations result directly from the key biological features, without assuming complicated mathematical functions or requiring more than one feedback loop. Each model examines a different mechanism for providing a negative feedback loop which results in p53 activation after DNA damage. The first model (ARF model) looks at the mechanism of p14ARF which sequesters Mdm2 and leads to stabilisation of p53. The second model (ATM model) examines the mechanism of ATM activation which leads to phosphorylation of both p53 and Mdm2 and increased degradation of Mdm2, which again results in p53 stabilisation. The models can readily be modified as further information becomes available, and linked to other models of cellular ageing. RESULTS: The ARF model is robust to changes in its parameters and predicts undamped oscillations after DNA damage so long as the signal persists. It also predicts that if there is a gradual accumulation of DNA damage, such as may occur in ageing, oscillations break out once a threshold level of damage is acquired. The ATM model requires an additional step for p53 synthesis for sustained oscillations to develop. The ATM model shows much more variability in the oscillatory behaviour and this variability is observed over a wide range of parameter values. This may account for the large variability seen in the experimental data which so far has examined ARF negative cells. CONCLUSION: The models predict more regular oscillations if ARF is present and suggest the need for further experiments in ARF positive cells to test these predictions. Our work illustrates the importance of systems biology approaches to understanding the complex role of p53 in both ageing and cancer.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
SBML creators: Armando Reyes-Palomares * , Carlos Rodr\u00edguez-Caso +, Raul Monta\u00f1ez * , Marta Cascante $, Francisca S\u00e1nchez-Jim\u00e9nez * , Miguel A. Medina *
* ProCel Group, Department of Molecular Biology and Biochemistry, Faculty of Sciences, Campus de Teatinos, University of Malaga and CIBER de Enfermedades Raras (CIBER-ER). + Complex Systems Lab (ICREA-UPF), Barcelona Biomedical Research Park (PRBB-GRIB). $ Department of Biochemistry and Molecular Biology, Faculty of Biology, Universitat de Barcelona.
http://asp.uma.es
Metabolic modeling of polyamine metabolism in mammals. Rodr\u00edguez-Caso,C et al.: J Biol Chem 2006 : 281:21799-812. The model reproduces the dynamical behavior of the polyamine metabolism in mammals. In this model there are some additions and corrections to the publication. All perturbations and analysis have produced results very close to the published experiments. The model was successfully tested on CoPaSi v.4.4 (build 26).
Parameters not included in the publication:
1. Parameters for SSAT kinetic constants:
KmAcCoA = 1.5 \u00b5M
KmCoA = 40 \u00b5M
2. Parameters for equation MAT (table 1):
Vmax_MAT = 0.45 \u00b5M/min
Km_MAT = 41 \u00b5M
Ki_MET_MAT = 50 \u00b5M
3. Erratum.: The corrected ODE for time-dependent variable Antz is:
KsANTZ*(1-1/(1+Keq*0.01*([D]+[S])))-KdANTZ*[Antz]
According to these modifications the new steady-state analysis results are:
Metabolites:
[P]= 104.681 \u00b5M
[D]= 76.7492 \u00b5M
[S]= 58.0135 \u00b5M
[SAM]= 52.327 \u00b5M
[A]= 0.0101962 \u00b5M
[aS]= 0.0245375 \u00b5M
[aD]= 0.832236 \u00b5M
Time-dependent global parameters:
[Antz] = 0.574038 \u00b5M
Vmaxodc = 1.28315 \u00b5M/min
Vmaxssat = 0.673814 \u00b5M/min
Vmaxsamdc = 0.36829 \u00b5M/min
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
In summary, you are entitled to use this encoded model in absolutely any manner you deem suitable, verbatim, or with modification, alone or embedded it in a larger context, redistribute it, commercially or not, in a restricted way or not.
SBML creators: Armando Reyes-Palomares * , Raul Monta\u00f1ez *, Carlos Rodriguez-Caso +, Francisca Sanchez-Jimenez * , Miguel A. Medina *
* ProCel Group, Department of Molecular Biology and Biochemistry, Faculty of Sciences, Campus de Teatinos, University of Malaga and CIBER de Enfermedades Raras (CIBER-ER). + Complex Systems Lab (ICREA-UPF), Barcelona Biomedical Research Park (PRBB-GRIB).
http://asp.uma.es
In silico analysis of arginine catabolism as a source of nitric oxide or polyamines in endothelial cells. Monta\u00f1ez, R et al.: Amino Acids. 2008 Feb;34(2):223-9. The model reproduces the dynamical behavior of the arginine catabolism and transport in relation to the nitric oxide production. In this model there are some additions and corrections to the publication. All perturbations and analysis have produced results very close to the published experiments. The model was successfully tested on CoPaSi v.4.4 (build 26).
Erratum: parameters values modificated respect to the publication to reach the steady-state:
Kmodc=90 \u00b5M (60 \u00b5M in the paper)
Kiornhat (is equivalent to the parameter Kmefflhat Eq ) = 360 \u00b5M (380 \u00b5M in the paper)
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
In summary, you are entitled to use this encoded model in absolutely any manner you deem suitable, verbatim, or with modification, alone or embedded it in a larger context, redistribute it, commercially or not, in a restricted way or not.
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- "repository_type": "biomodels",
- "summary": " \t This model represents a concentration gradient of RanGTP across the nuclear envelope. This gradient is generated by distribution of regulators of RanGTPase. We have taken a log linear plot of graphs generated by GENESIS and compared with the experimental graphs.
This model originates from BioModels Database: A Database of Annotated Published Models. It is copyright (c) 2005-2008 The BioModels Team. For more information see the terms of use.
In-silico study of kinetochore control, amplification, and inhibition effects in MCC assembly
Bashar Ibrahim, Eberhard Schmitt, Peter Dittrich, Stephan Diekmann This is the kinetochore dependent MCC model (KDM) from the article. For the kinetochore independent MCC model (KIM) replace u*k4f in R4 by k4f and u*k5f in R5 by k5f .
This model describes the budding yeast cell cycle model used in fig 8 a in Regulation of the eukaryotic cell cycle: molecular antagonism, hysteresis, and irreversible transitions. Tyson JJ and Novak B., J Theor Biol 2001 May;210(2):249-63. It consitsts of the equations (2)-(8), with mu=0.005 min -1 . It was taken from Cell Cycle DB ( file ) and only slightly altered.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
In summary, you are entitled to use this encoded model in absolutely any manner you deem suitable, verbatim, or with modification, alone or embedded it in a larger context, redistribute it, commercially or not, in a restricted way or not.
In this model the values of \"free CDK\" (Id: x2), \"cdc25_P\" (x4) \"Wee1_P\" (Id: y5) and \"APC\" (Id: y6) are assigned using the parameters describing the total concentrations totcdk (Id: c)), totcdc5, totwee1 and totAPC. So if you want to change the levels of these proteins, you need to change the values ofthese parameters.
SBML model exported from PottersWheel on 2007-09-19 15:35:47.
The values for parameters and the inital concentrations of this model where directly provided by the main author:
Parameter values
parameter
value
unit
p1
0.0025
1/min
p2
0.0784
1/min
p3
0.0013
1/min
p4
0.0827
1/min
p5
0.0091
1/min
p6
0.000064
1/(nmole*min)
p7
0.0397
1/min
p8
1000
nmole
p9
0.0098
1/(nmole*min)
p10
1.6
1/min
p11
1000
nmole
p12
0.0003
ml/min
The basal chamber volume was taken as 1 ml, the apical as 1.5. As starting values x1 was set to 88 nmole, all other species to 0.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
In summary, you are entitled to use this encoded model in absolutely any manner you deem suitable, verbatim, or with modification, alone or embedded it in a larger context, redistribute it, commercially or not, in a restricted way or not.
Stone1996 - activation of soluble guanylatecyclase by nitric oxide
This features the two step binding ofNO to soluble Guanylyl Cyclase as proposed by StoneJR, Marletta MA. Biochemistry (1996) 35(4):1093-9 . There is afast step binding scheme and a slow step binding scheme. Thedifference lies in the binding of a NO to a non-heme site on sGC,which may not necessarily be the same site of binding during theinitial binding. The rates have been directly used models.
The soluble form of guanylate cyclase (sGC) is the only definitive receptor for the signaling agent nitric oxide (.NO). The enzyme is a heterodimer of homologous subunits in which each subunit binds 1 equiv of 5-coordinate high-spin heme. .NO increases the Vmax of sGC up to 400-fold and has previously been shown to bind to the heme to form a 5-coordinate complex. Using stopped-flow spectrophotometry, it is demonstrated that the binding of .NO to the heme of sGC is a complex process. .NO first binds to the heme to form a 6-coordinate nitrosyl complex, which then converts to a 5-coordinate nitrosyl complex through one of two ways. For 28 +/- 4% of the heme, the 6-coordinate nitrosyl complex rapidly (approximately 20 s-1) converts to the 5-coordinate complex. For the remaining 72 +/- 4% of the heme, the conversion of the 6-coordinate nitrosyl complex to a 5-coordinate nitrosyl complex is slow (0.1-1.0 s-1) and is dependent upon the interaction of .NO with an unidentified non-heme site on the protein. The heme (200 nM) was completely converted to the 5-coordinate state with as little as 500 nM .NO, and the equilibrium dissociation constant of .NO for activating the enzyme was determined to be < or = 250 nM. Gel-filtration analysis indicates that the binding of .NO to the heme has no effect on the native molecular mass of the protein. Correlation of electronic absorption spectra with activity measurements indicates that the 5-coordinate nitrosyl form of the enzyme is activated relative to the resting 5-coordinate ferrous form of the enzyme.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
",
- "tags": [
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- "id": 2936,
- "tag": "BioModels"
- },
- {
- "id": 3336,
- "tag": "BioModels:BIOMD0000000198"
- },
- {
- "id": 3337,
- "tag": "Bos taurus"
- },
- {
- "id": 3338,
- "tag": "Nitric oxide mediated signal transduction"
- },
- {
- "id": 3339,
- "tag": "Regulation of guanylate cyclase activity"
- },
- {
- "id": 704,
- "tag": "SBML"
- }
- ],
- "timestamp_created": "2025-01-30 13:34:00.103442+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000000198",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2489": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "3",
- "id": 2489,
- "name": "Santolini2001_nNOS_Mechanism_Regulation",
- "repository_type": "biomodels",
- "summary": " \t This is a model of neuronal Nitric Oxide Synthase expressed in Escherichia coli based on Santolini J. et al. J Biol Chem. (2001) 276(2):1233-43. Differing from the article, oxygen explicitly included in the reaction 2, 5 and 10 (numbers as in scheme 1 in the article). In the article the assumed oxygen concentration of 140 uM was included in the pseudo first order rate constant. Fig 2E in the article shows different time courses for citrulline and NO than the ones produced by this model. Dr. Santolini, one of the authors of the article, wrote that the legends in fig. 2E might be mixed up and should rather denote NO and NO3 instead of citrulline and NO.
This is a model of the coupled Natch, Wnt and FGF modules as described in: A. Goldbeter and O. Pourqui\u00e9 , Modeling the segmentation clock as a network of coupled oscillations in the Notch, Wnt and FGF signaling pathways. J Theor Biol. 2008 Jun 7;252(3):574-85, pubmed ID: 18308339 To uncouple the modules remove the reaction MAx_trans_Xa and set vsFK=vsF . The SBML version of the model was converted from the CellML version by Catherine Lloyd for the CellML repository .
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
In summary, you are entitled to use this encoded model in absolutely any manner you deem suitable, verbatim, or with modification, alone or embedded it in a larger context, redistribute it, commercially or not, in a restricted way or not.
The model reproduces the plots in Figures 1 and 2. Note that the units of the time scale \"A\" are not right in the paper, it was corrected by the curator. Model successfully tested on MathSBML.
Chickarmane V, Troein C, Nuber UA, Sauro HM, Peterson C
PLoS Computational Biology. 2006; 2(9):e123
Abstract:
Recent ChIP experiments of human and mouse embryonic stem cells have elucidated the architecture of the transcriptional regulatory circuitry responsible for cell determination, which involves the transcription factors OCT4, SOX2, and NANOG. In addition to regulating each other through feedback loops, these genes also regulate downstream target genes involved in the maintenance and differentiation of embryonic stem cells. A search for the OCT4-SOX2-NANOG network motif in other species reveals that it is unique to mammals. With a kinetic modeling approach, we ascribe function to the observed OCT4-SOX2-NANOG network by making plausible assumptions about the interactions between the transcription factors at the gene promoter binding sites and RNA polymerase (RNAP), at each of the three genes as well as at the target genes. We identify a bistable switch in the network, which arises due to several positive feedback loops, and is switched on/off by input environmental signals. The switch stabilizes the expression levels of the three genes, and through their regulatory roles on the downstream target genes, leads to a binary decision: when OCT4, SOX2, and NANOG are expressed and the switch is on, the self-renewal genes are on and the differentiation genes are off. The opposite holds when the switch is off. The model is extremely robust to parameter changes. In addition to providing a self-consistent picture of the transcriptional circuit, the model generates several predictions. Increasing the binding strength of NANOG to OCT4 and SOX2, or increasing its basal transcriptional rate, leads to an irreversible bistable switch: the switch remains on even when the activating signal is removed. Hence, the stem cell can be manipulated to be self-renewing without the requirement of input signals. We also suggest tests that could discriminate between a variety of feedforward regulation architectures of the target genes by OCT4, SOX2, and NANOG.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
Chickarmane V, Troein C, Nuber UA, Sauro HM, Peterson C
PLoS Computational Biology. 2006; 2(9):e123
Abstract:
Recent ChIP experiments of human and mouse embryonic stem cells have elucidated the architecture of the transcriptional regulatory circuitry responsible for cell determination, which involves the transcription factors OCT4, SOX2, and NANOG. In addition to regulating each other through feedback loops, these genes also regulate downstream target genes involved in the maintenance and differentiation of embryonic stem cells. A search for the OCT4-SOX2-NANOG network motif in other species reveals that it is unique to mammals. With a kinetic modeling approach, we ascribe function to the observed OCT4-SOX2-NANOG network by making plausible assumptions about the interactions between the transcription factors at the gene promoter binding sites and RNA polymerase (RNAP), at each of the three genes as well as at the target genes. We identify a bistable switch in the network, which arises due to several positive feedback loops, and is switched on/off by input environmental signals. The switch stabilizes the expression levels of the three genes, and through their regulatory roles on the downstream target genes, leads to a binary decision: when OCT4, SOX2, and NANOG are expressed and the switch is on, the self-renewal genes are on and the differentiation genes are off. The opposite holds when the switch is off. The model is extremely robust to parameter changes. In addition to providing a self-consistent picture of the transcriptional circuit, the model generates several predictions. Increasing the binding strength of NANOG to OCT4 and SOX2, or increasing its basal transcriptional rate, leads to an irreversible bistable switch: the switch remains on even when the activating signal is removed. Hence, the stem cell can be manipulated to be self-renewing without the requirement of input signals. We also suggest tests that could discriminate between a variety of feedforward regulation architectures of the target genes by OCT4, SOX2, and NANOG.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
Model reproduces the dynamics of ATP and NADH as depicted in Fig 4 of the paper. Model successfully tested on Jarnac and MathSBML.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
In summary, you are entitled to use this encoded model in absolutely any manner you deem suitable, verbatim, or with modification, alone or embedded it in a larger context, redistribute it, commercially or not, in a restricted way or not.
The model reproduces Fig 3 of the paper. Model successfully reproduced using MathSBML and Jarnac.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
In summary, you are entitled to use this encoded model in absolutely any manner you deem suitable, verbatim, or with modification, alone or embedded it in a larger context, redistribute it, commercially or not, in a restricted way or not.
The model reproduces Fig 3 of the paper corresponding to the transition to S phase. Units have not been defined for this model because the paper mentions the use of arbitrary units for the various species and parameters. Model reproduced using MathSBML.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
In summary, you are entitled to use this encoded model in absolutely any manner you deem suitable, verbatim, or with modification, alone or embedded it in a larger context, redistribute it, commercially or not, in a restricted way or not.
In this work, a dynamical model of lineage determination based upon a minimal circuit, as discussed in PMID: 17215298 , which contains the Oct4/Sox2/Nanog core as well its interaction with a few other key genes is discussed.
BACKGROUND: Recent studies have associated the transcription factors, Oct4, Sox2 and Nanog as parts of a self-regulating network which is responsible for maintaining embryonic stem cell properties: self renewal and pluripotency. In addition, mutual antagonism between two of these and other master regulators have been shown to regulate lineage determination. In particular, an excess of Cdx2 over Oct4 determines the trophectoderm lineage whereas an excess of Gata-6 over Nanog determines differentiation into the endoderm lineage. Also, under/over-expression studies of the master regulator Oct4 have revealed that some self-renewal/pluripotency as well as differentiation genes are expressed in a biphasic manner with respect to the concentration of Oct4. METHODOLOGY/
PRINCIPAL FINDINGS: We construct a dynamical model of a minimalistic network, extracted from ChIP-on-chip and microarray data as well as literature studies. The model is based upon differential equations and makes two plausible assumptions; activation of Gata-6 by Oct4 and repression of Nanog by an Oct4-Gata-6 heterodimer. With these assumptions, the results of simulations successfully describe the biphasic behavior as well as lineage commitment. The model also predicts that reprogramming the network from a differentiated state, in particular the endoderm state, into a stem cell state, is best achieved by over-expressing Nanog, rather than by suppression of differentiation genes such as Gata-6.
CONCLUSIONS: The computational model provides a mechanistic understanding of how different lineages arise from the dynamics of the underlying regulatory network. It provides a framework to explore strategies of reprogramming a cell from a differentiated state to a stem cell state through directed perturbations. Such an approach is highly relevant to regenerative medicine since it allows for a rapid search over the host of possibilities for reprogramming to a stem cell state.
To the extent possible under law, all copyright and related orneighbouring rights to this encoded model have been dedicated to the publicdomain worldwide. Please refer to CC0 Public DomainDedication for more information.
In this work, a dynamical model of lineage determination based upon a minimal circuit, as discussed in PMID: 17215298 , which contains the Oct4/Sox2/Nanog core as well its interaction with a few other key genes is discussed.
BACKGROUND: Recent studies have associated the transcription factors, Oct4, Sox2 and Nanog as parts of a self-regulating network which is responsible for maintaining embryonic stem cell properties: self renewal and pluripotency. In addition, mutual antagonism between two of these and other master regulators have been shown to regulate lineage determination. In particular, an excess of Cdx2 over Oct4 determines the trophectoderm lineage whereas an excess of Gata-6 over Nanog determines differentiation into the endoderm lineage. Also, under/over-expression studies of the master regulator Oct4 have revealed that some self-renewal/pluripotency as well as differentiation genes are expressed in a biphasic manner with respect to the concentration of Oct4. METHODOLOGY/
PRINCIPAL FINDINGS: We construct a dynamical model of a minimalistic network, extracted from ChIP-on-chip and microarray data as well as literature studies. The model is based upon differential equations and makes two plausible assumptions; activation of Gata-6 by Oct4 and repression of Nanog by an Oct4-Gata-6 heterodimer. With these assumptions, the results of simulations successfully describe the biphasic behavior as well as lineage commitment. The model also predicts that reprogramming the network from a differentiated state, in particular the endoderm state, into a stem cell state, is best achieved by over-expressing Nanog, rather than by suppression of differentiation genes such as Gata-6.
CONCLUSIONS: The computational model provides a mechanistic understanding of how different lineages arise from the dynamics of the underlying regulatory network. It provides a framework to explore strategies of reprogramming a cell from a differentiated state to a stem cell state through directed perturbations. Such an approach is highly relevant to regenerative medicine since it allows for a rapid search over the host of possibilities for reprogramming to a stem cell state.
To the extent possible under law, all copyright and related orneighbouring rights to this encoded model have been dedicated to the publicdomain worldwide. Please refer to CC0 Public DomainDedication for more information.
This model is from the article: Experimental and in silico analyses of glycolytic flux control in bloodstream form Trypanosoma brucei. Albert MA, Haanstra JR, Hannaert V, Van Roy J, Opperdoes FR, Bakker BM, Michels PA. J Biol Chem2005 Aug 5;280(31):28306-15. 15955817, Abstract: A mathematical model of glycolysis in bloodstream form Trypanosoma brucei was developed previously on the basis of all available enzyme kinetic data (Bakker, B. M., Michels, P. A. M., Opperdoes, F. R., and Westerhoff, H. V. (1997) J. Biol. Chem. 272, 3207-3215). The model predicted correctly the fluxes and cellular metabolite concentrations as measured in non-growing trypanosomes and the major contribution to the flux control exerted by the plasma membrane glucose transporter. Surprisingly, a large overcapacity was predicted for hexokinase (HXK), phosphofructokinase (PFK), and pyruvate kinase (PYK). Here, we present our further analysis of the control of glycolytic flux in bloodstream form T. brucei. First, the model was optimized and extended with recent information about the kinetics of enzymes and their activities as measured in lysates of in vitro cultured growing trypanosomes. Second, the concentrations of five glycolytic enzymes (HXK, PFK, phosphoglycerate mutase, enolase, and PYK) in trypanosomes were changed by RNA interference. The effects of the knockdown of these enzymes on the growth, activities, and levels of various enzymes and glycolytic flux were studied and compared with model predictions. Data thus obtained support the conclusion from the in silico analysis that HXK, PFK, and PYK are in excess, albeit less than predicted. Interestingly, depletion of PFK and enolase had an effect on the activity (but not, or to a lesser extent, expression) of some other glycolytic enzymes. Enzymes located both in the glycosomes (the peroxisome-like organelles harboring the first seven enzymes of the glycolytic pathway of trypanosomes) and in the cytosol were affected. These data suggest the existence of novel regulatory mechanisms operating in trypanosome glycolysis.
This a model described in the article: Understanding the regulation of aspartate metabolism using a model based on measured kinetic parameters. Curien G, Bastien O, Robert-Genthon M, Cornish-Bowden A, C\u00e1rdenas ML, Dumas R. Mol Syst Biol. 2009;5:271. Epub 2009 May 19. PMID: 19455135 , doi: 10.1038/msb.2009.29 Abstract: The aspartate-derived amino-acid pathway from plants is well suited for analysing the function of the allosteric network of interactions in branched pathways. For this purpose, a detailed kinetic model of the system in the plant model Arabidopsis was constructed on the basis of in vitro kinetic measurements. The data, assembled into a mathematical model, reproduce in vivo measurements and also provide non-intuitive predictions. A crucial result is the identification of allosteric interactions whose function is not to couple demand and supply but to maintain a high independence between fluxes in competing pathways. In addition, the model shows that enzyme isoforms are not functionally redundant, because they contribute unequally to the flux and its regulation. Another result is the identification of the threonine concentration as the most sensitive variable in the system, suggesting a regulatory role for threonine at a higher level of integration.
The limiting rates for the tRNA synthetase reactions, V_Lys_RS, V_Thr_RS and V_Ile_RS, are all assigned a joined value, Vmax_AA_RS, to facilitate reproduction of the results in the publication. To alter these rates seperately these assignments have to be changed or removed.
This is an SBML version of the folate cycle model model from: A mathematical model of the folate cycle: new insights into folate homeostasis. Nijhout HF, Reed MC, Budu P, Ulrich CM J. Biol. Chem.,2004, 279 (53),55008-16 pubmedID: 15496403 Abstract: A mathematical model is developed for the folate cycle based on standard biochemical kinetics. We use the model to provide new insights into several different mechanisms of folate homeostasis. The model reproduces the known pool sizes of folate substrates and the fluxes through each of the loops of the folate cycle and has the qualitative behavior observed in a variety of experimental studies. Vitamin B(12) deficiency, modeled as a reduction in the V(max) of the methionine synthase reaction, results in a secondary folate deficiency via the accumulation of folate as 5-methyltetrahydrofolate (the \"methyl trap\"). One form of homeostasis is revealed by the fact that a 100-fold up-regulation of thymidylate synthase and dihydrofolate reductase (known to occur at the G(1)/S transition) dramatically increases pyrimidine production without affecting the other reactions of the folate cycle. The model also predicts that an almost total inhibition of dihydrofolate reductase is required to significantly inhibit the thymidylate synthase reaction, consistent with experimental and clinical studies on the effects of methotrexate. Sensitivity to variation in enzymatic parameters tends to be local in the cycle and inversely proportional to the number of reactions that interconvert two folate substrates. Another form of homeostasis is a consequence of the nonenzymatic binding of folate substrates to folate enzymes. Without folate binding, the velocities of the reactions decrease approximately linearly as total folate is decreased. In the presence of folate binding and allosteric inhibition, the velocities show a remarkable constancy as total folate is decreased. This model was encoded by Michal Galdzicki from a MatLab file send to him by Prof. Michael Reed. There some differences in this model compared to the one described in the article, possible due to typos in the publication: 1) reaction NE (THF + H2CO <=> 5,10-CH2-THF) in the article has H2C=O as areactant and is mentioned to display pseudo first order mass actionkinetics, while in the matlab file formic acid, also used in reaction FTS, is included in the rate law for the forward reaction. 2) the reaction MS is modeled after Reed et al. 2004, which is notexplicitly mentioned in the article, although Kd and the parametersfrom Reed et al. 2004 are given. 3) in the kinetic law of the SHTM reaction (THF + Ser <=>5,10-CH2-THF + Gly), there are separate values given for Km,Glyand Km,5,10-CH2-THF in the article. in the matlab file and the SBMLmodel Km,Ser and Km,THF are used instead of Km,Gly and Km,5,10-CH2-THFfor the backwards reaction.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
In summary, you are entitled to use this encoded model in absolutely any manner you deem suitable, verbatim, or with modification, alone or embedded it in a larger context, redistribute it, commercially or not, in a restricted way or not.
This model 2 described in the supplement of the article below. It is parameterized for the WT at 24\u00b0C. To reproduce figure 6 the results have to be rescaled to circadian time by multiplying time by 24/tau, with tau being the period of the free-running oscillator. For the wild-type parameter set tau is equal to 22.7149. Article: Isoform switching facilitates period control in the Neurospora crassa circadian clock. Akman OE, Locke JC, Tang S, Carr\u00e9 I, Millar AJ, Rand DA. Mol Syst Biol. 2008;4:164. Epub 2008 Feb 12. PMID: 18277380, doi:10.1038/msb.2008.5 Abstract: A striking and defining feature of circadian clocks is the small variation in period over a physiological range of temperatures. This is referred to as temperature compensation, although recent work has suggested that the variation observed is a specific, adaptive control of period. Moreover, given that many biological rate constants have a Q(10) of around 2, it is remarkable that such clocks remain rhythmic under significant temperature changes. We introduce a new mathematical model for the Neurospora crassa circadian network incorporating experimental work showing that temperature alters the balance of translation between a short and long form of the FREQUENCY (FRQ) protein. This is used to discuss period control and functionality for the Neurospora system. The model reproduces a broad range of key experimental data on temperature dependence and rhythmicity, both in wild-type and mutant strains. We present a simple mechanism utilising the presence of the FRQ isoforms (isoform switching) by which period control could have evolved, and argue that this regulatory structure may also increase the temperature range where the clock is robustly rhythmic.
This a model from the article: Sequential polarization and imprinting of type 1 T helper lymphocytes by interferon-gamma and interleukin-12. Schulz EG, Mariani L, Radbruch A, H\u00f6fer T. Immunity.2009;30(5):666-8. 19409816, Abstract: Differentiation of naive T lymphocytes into type I T helper (Th1) cells requires interferon-gamma and interleukin-12. It is puzzling that interferon-gamma induces the Th1 transcription factor T-bet, whereas interleukin-12 mediates Th1 cell lineage differentiation. We use mathematical modeling to analyze the expression kinetics of T-bet, interferon-gamma, and the IL-12 receptor beta2 chain (IL-12Rbeta2) during Th1 cell differentiation, in the presence or absence of interleukin-12 or interferon-gamma signaling. We show that interferon-gamma induced initial T-bet expression, whereas IL-12Rbeta2 was repressed by T cell receptor (TCR) signaling. The termination of TCR signaling permitted upregulation of IL-12Rbeta2 by T-bet and interleukin-12 signaling that maintained T-bet expression. This late expression of T-bet, accompanied by the upregulation of the transcription factors Runx3 and Hlx, was required to imprint the Th cell for interferon-gamma re-expression. Thus initial polarization and subsequent imprinting of Th1 cells are mediated by interlinked, sequentially acting positive feedback loops of TCR-interferon-gamma-Stat1-T-bet and interleukin-12-Stat4-T-bet signaling.
The original model was created by: Edda G. Schulz schulz@drfz.de Theoretical Biophysics, Institute of Biology, Humboldt Universit\u00e4t, Invalidenstrasse 42, 10115 Berlin, Germany.
This a model from the article: Minimum criteria for DNA damage-induced phase advances in circadian rhythms. Hong CI, Z\u00e1mborszky J, Csik\u00e1sz-Nagy A. PLoS Comput Biol. 2009 May;5(5):e1000384. 19424508, Abstract: Robust oscillatory behaviors are common features of circadian and cell cycle rhythms. These cyclic processes, however, behave distinctively in terms of their periods and phases in response to external influences such as light, temperature, nutrients, etc. Nevertheless, several links have been found between these two oscillators. Cell division cycles gated by the circadian clock have been observed since the late 1950s. On the other hand, ionizing radiation (IR) treatments cause cells to undergo a DNA damage response, which leads to phase shifts (mostly advances) in circadian rhythms. Circadian gating of the cell cycle can be attributed to the cell cycle inhibitor kinase Wee1 (which is regulated by the heterodimeric circadian clock transcription factor, BMAL1/CLK), and possibly in conjunction with other cell cycle components that are known to be regulated by the circadian clock (i.e., c-Myc and cyclin D1). It has also been shown that DNA damage-induced activation of the cell cycle regulator, Chk2, leads to phosphorylation and destruction of a circadian clock component (i.e., PER1 in Mus or FRQ in Neurospora crassa). However, the molecular mechanism underlying how DNA damage causes predominantly phase advances in the circadian clock remains unknown. In order to address this question, we employ mathematical modeling to simulate different phase response curves (PRCs) from either dexamethasone (Dex) or IR treatment experiments. Dex is known to synchronize circadian rhythms in cell culture and may generate both phase advances and delays. We observe unique phase responses with minimum delays of the circadian clock upon DNA damage when two criteria are met: (1) existence of an autocatalytic positive feedback mechanism in addition to the time-delayed negative feedback loop in the clock system and (2) Chk2-dependent phosphorylation and degradation of PERs that are not bound to BMAL1/CLK.
The original xpp file of the model is available as a supplement of the article (Text S1).\t
This a model from the article: The multifarious short-term regulation of ammonium assimilation of Escherichia coli: dissection using an in silico replica. Bruggeman FJ, Boogerd FC, Westerhoff HV. FEBS J. 2005 Apr;272(8):1965-85. 15819889 , Abstract: Ammonium assimilation in Escherichia coli is regulated through multiple mechanisms (metabolic, signal transduction leading to covalent modification, transcription, and translation), which (in-)directly affect the activities of its two ammonium-assimilating enzymes, i.e. glutamine synthetase (GS) and glutamate dehydrogenase (GDH). Much is known about the kinetic properties of the components of the regulatory network that these enzymes are part of, but the ways in which, and the extents to which the network leads to subtle and quasi-intelligent regulation are unappreciated. To determine whether our present knowledge of the interactions between and the kinetic properties of the components of this network is complete - to the extent that when integrated in a kinetic model it suffices to calculate observed physiological behaviour - we now construct a kinetic model of this network, based on all of the kinetic data on the components that is available in the literature. We use this model to analyse regulation of ammonium assimilation at various carbon statuses for cells that have adapted to low and high ammonium concentrations. We show how a sudden increase in ammonium availability brings about a rapid redirection of the ammonium assimilation flux from GS/glutamate synthase (GOGAT) to GDH. The extent of redistribution depends on the nitrogen and carbon status of the cell. We develop a method to quantify the relative importance of the various regulators in the network. We find the importance is shared among regulators. We confirm that the adenylylation state of GS is the major regulator but that a total of 40% of the regulation is mediated by ADP (22%), glutamate (10%), glutamine (7%) and ATP (1%). The total steady-state ammonium assimilation flux is remarkably robust against changes in the ammonium concentration, but the fluxes through GS and GDH are completely nonrobust. Gene expression of GOGAT above a threshold value makes expression of GS under ammonium-limited conditions, and of GDH under glucose-limited conditions, sufficient for ammonium assimilation.
This version of the model originates from JWS online . The original model can be retrieved here .
This model originates from BioModels Database: A Database of Annotated Published Models. It is copyright (c) 2005-2009 The BioModels Team. To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
In summary, you are entitled to use this encoded model in absolutely any manner you deem suitable, verbatim, or with modification, alone or embedded it in a larger context, redistribute it, commercially or not, in a restricted way or not..
This a model from the article: Kinetic modeling of tricarboxylic acid cycle and glyoxylate bypass in Mycobacterium tuberculosis, and its application to assessment of drug targets. Singh VK , Ghosh I Theor Biol Med Model 2006 Aug 3;3:27 16887020 , Abstract: BACKGROUND: Targeting persistent tubercule bacilli has become an important challenge in the development of anti-tuberculous drugs. As the glyoxylate bypass is essential for persistent bacilli, interference with it holds the potential for designing new antibacterial drugs. We have developed kinetic models of the tricarboxylic acid cycle and glyoxylate bypass in Escherichia coli and Mycobacterium tuberculosis, and studied the effects of inhibition of various enzymes in the M. tuberculosis model. RESULTS: We used E. coli to validate the pathway-modeling protocol and showed that changes in metabolic flux can be estimated from gene expression data. The M. tuberculosis model reproduced the observation that deletion of one ofthe two isocitrate lyase genes has little effect on bacterial growth in macrophages, but deletion of both genes leads to the elimination of the bacilli from the lungs. It also substantiated the inhibition of isocitrate lyases by 3-nitropropionate. On the basis of our simulation studies, we propose that: (i) fractional inactivation of both isocitrate dehydrogenase 1 and isocitrate dehydrogenase 2 is required for a flux through the glyoxylate bypass in persistent mycobacteria; and (ii) increasing the amount of active isocitrate dehydrogenases can stop the flux through the glyoxylate bypass, so the kinase that inactivates isocitrate dehydrogenase 1 and/or the proposed inactivator of isocitrate dehydrogenase 2 is a potential target for drugs against persistent mycobacteria. In addition, competitive inhibition of isocitrate lyases along with a reduction in the inactivation of isocitrate dehydrogenases appears to be a feasible strategy for targeting persistent mycobacteria. CONCLUSION: We used kinetic modeling of biochemical pathways to assess various potential anti-tuberculous drug targets that interfere with the glyoxylate bypass flux, and indicated the type of inhibition needed to eliminate the pathogen. The advantage of such an approach to the assessment of drug targets is that it facilitates the study of systemic effect(s) of the modulation of the target enzyme(s) in the cellular environment.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
In summary, you are entitled to use this encoded model in absolutely any manner you deem suitable, verbatim, or with modification, alone or embedded it in a larger context, redistribute it, commercially or not, in a restricted way or not.
This a model from the article: Kinetic modeling of tricarboxylic acid cycle and glyoxylate bypass in Mycobacterium tuberculosis, and its application to assessment of drug targets. Singh VK , Ghosh I Theor Biol Med Model 2006 Aug 3;3:27 16887020 , Abstract: BACKGROUND: Targeting persistent tubercule bacilli has become an important challenge in the development of anti-tuberculous drugs. As the glyoxylate bypass is essential for persistent bacilli, interference with it holds the potential for designing new antibacterial drugs. We have developed kinetic models of the tricarboxylic acid cycle and glyoxylate bypass in Escherichia coli and Mycobacterium tuberculosis, and studied the effects of inhibition of various enzymes in the M. tuberculosis model. RESULTS: We used E. coli to validate the pathway-modeling protocol and showed that changes in metabolic flux can be estimated from gene expression data. The M. tuberculosis model reproduced the observation that deletion of one of the two isocitrate lyase genes has little effect on bacterial growth in macrophages, but deletion of both genes leads to the elimination of the bacilli from the lungs. It also substantiated the inhibition of isocitrate lyases by 3-nitropropionate. On the basis of our simulation studies, we propose that: (i) fractional inactivation of both isocitrate dehydrogenase 1 and isocitrate dehydrogenase 2 is required for a flux through the glyoxylate bypass in persistent mycobacteria; and (ii) increasing the amount of active isocitrate dehydrogenases can stop the flux through the glyoxylate bypass, so the kinase that inactivates isocitrate dehydrogenase 1 and/or the proposed inactivator of isocitrate dehydrogenase 2 is a potential target for drugs against persistent mycobacteria. In addition, competitive inhibition of isocitrate lyases along with a reduction in the inactivation of isocitrate dehydrogenases appears to be a feasible strategy for targeting persistent mycobacteria. CONCLUSION: We used kinetic modeling of biochemical pathways to assess various potential anti-tuberculous drug targets that interfere with the glyoxylate bypass flux, and indicated the type of inhibition needed to eliminate the pathogen. The advantage of such an approach to the assessment of drug targets is that it facilitates the study of systemic effect(s) of the modulation of the target enzyme(s) in the cellular environment.
This the model used in the article: Quantitative analysis of pathways controlling extrinsic apoptosis in single cells. Albeck JG, Burke JM, Aldridge BB, Zhang M, Lauffenburger DA, Sorger PK. Mol Cell. 2008 Apr 11;30(1):11-25. PMID: 18406323 , doi: 10.1016/j.molcel.2008.02.012 Abstract: Apoptosis in response to TRAIL or TNF requires the activation of initiator\tcaspases, which then activate the effector caspases that dismantle\tcells and cause death. However, little is known about the dynamics\tand regulatory logic linking initiators and effectors. Using a combination\tof live-cell reporters, flow cytometry, and immunoblotting, we find\tthat initiator caspases are active during the long and variable delay\tthat precedes mitochondrial outer membrane permeabilization (MOMP)\tand effector caspase activation. When combined with a mathematical\tmodel of core apoptosis pathways, experimental perturbation of regulatory\tlinks between initiator and effector caspases reveals that XIAP and\tproteasome-dependent degradation of effector caspases are important\tin restraining activity during the pre-MOMP delay. We identify conditions\tin which restraint is impaired, creating a physiologically indeterminate\tstate of partial cell death with the potential to generate genomic\tinstability. Together, these findings provide a quantitative picture\tof caspase regulatory networks and their failure modes. The mitochondrial compartment is just added as a logical partition and its volume is not used in the mathematical formulas, to stick closer to the expressions used in the matlab files distributed with the original publication. There only the rate constants for bimolecular reactions are adapted by division by v , the ration of the volumes of the mitochondrial compartment and the total cell. For BCL2 overexpression in figure 5, the initial BCL2 amount was increased by a factor 12 to 2.4*10 5 . For siRNA downregulation of XIAP its amount was multiplied by 0.13 to 1.3*10 4 .
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
In summary, you are entitled to use this encoded model in absolutely any manner you deem suitable, verbatim, or with modification, alone or embedded it in a larger context, redistribute it, commercially or not, in a restricted way or not.
This a model from the article: Kinetic modeling of tricarboxylic acid cycle and glyoxylate bypass in Mycobacterium tuberculosis, and its application to assessment of drug targets. Singh VK , Ghosh I Theor Biol Med Model 2006 Aug 3;3:27 16887020 , Abstract: BACKGROUND: Targeting persistent tubercule bacilli has become an important challenge in the development of anti-tuberculous drugs. As the glyoxylate bypass is essential for persistent bacilli, interference with it holds the potential for designing new antibacterial drugs. We have developed kinetic models of the tricarboxylic acid cycle and glyoxylate bypass in Escherichia coli and Mycobacterium tuberculosis, and studied the effects of inhibition of various enzymes in the M. tuberculosis model. RESULTS: We used E. coli to validate the pathway-modeling protocol and showed that changes in metabolic flux can be estimated from gene expression data. The M. tuberculosis model reproduced the observation that deletion of one ofthe two isocitrate lyase genes has little effect on bacterial growth in macrophages, but deletion of both genes leads to the elimination of the bacilli from the lungs. It also substantiated the inhibition of isocitrate lyases by 3-nitropropionate. On the basis of our simulation studies, we propose that: (i) fractional inactivation of both isocitrate dehydrogenase 1 and isocitrate dehydrogenase 2 is required for a flux through the glyoxylate bypass in persistent mycobacteria; and (ii) increasing the amount of active isocitrate dehydrogenases can stop the flux through the glyoxylate bypass, so the kinase that inactivates isocitrate dehydrogenase 1 and/or the proposed inactivator of isocitrate dehydrogenase 2 is a potential target for drugs against persistent mycobacteria. In addition, competitive inhibition of isocitrate lyases along with a reduction in the inactivation of isocitrate dehydrogenases appears to be a feasible strategy for targeting persistent mycobacteria. CONCLUSION: We used kinetic modeling of biochemical pathways to assess various potential anti-tuberculous drug targets that interfere with the glyoxylate bypass flux, and indicated the type of inhibition needed to eliminate the pathogen. The advantage of such an approach to the assessment of drug targets is that it facilitates the study of systemic effect(s) of the modulation of the target enzyme(s) in the cellular environment.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
In summary, you are entitled to use this encoded model in absolutely any manner you deem suitable, verbatim, or with modification, alone or embedded it in a larger context, redistribute it, commercially or not, in a restricted way or not.
This a model from the article: Kinetic modeling of tricarboxylic acid cycle and glyoxylate bypass in Mycobacterium tuberculosis, and its application to assessment of drugtargets. Singh VK , Ghosh I Theor Biol Med Model 2006 Aug 3;3:27 16887020 , Abstract: BACKGROUND: Targeting persistent tubercule bacilli has become an important challenge in the development of anti-tuberculous drugs. As the glyoxylate bypass is essential for persistent bacilli, interference with it holds the potential for designing new antibacterial drugs. We have developed kinetic models of the tricarboxylic acid cycle and glyoxylate bypass in Escherichia coli and Mycobacterium tuberculosis, and studied the effects of inhibition of various enzymes in the M. tuberculosis model. RESULTS: We used E. coli to validate the pathway-modeling protocol and showed that changes in metabolic flux can be estimated from gene expression data. The M. tuberculosis model reproduced the observation that deletion of one of the two isocitrate lyase genes has little effect on bacterial growth in macrophages, but deletion of both genes leads to the elimination of the bacilli from the lungs. It also substantiated the inhibition of isocitrate lyases by 3-nitropropionate. On the basis of our simulation studies, we propose that: (i) fractional inactivation of both isocitrate dehydrogenase 1 and isocitrate dehydrogenase 2 is required for a flux through the glyoxylate bypass in persistent mycobacteria; and (ii) increasing the amountof active isocitrate dehydrogenases can stop the flux through the glyoxylate bypass, so the kinase that inactivates isocitrate dehydrogenase 1 and/or the proposed inactivator of isocitrate dehydrogenase 2 is a potential target for drugs against persistent mycobacteria. In addition, competitive inhibition of isocitrate lyases along with a reduction in the inactivation of isocitrate dehydrogenases appears to be a feasible strategy for targeting persistent mycobacteria. CONCLUSION: We used kinetic modeling of biochemical pathways to assess various potential anti-tuberculous drug targets that interfere with the glyoxylate bypass flux, and indicated the type of inhibition needed to eliminate the pathogen. The advantage of such an approach to the assessment of drug targets is that it facilitates the study of systemic effect(s) of the modulation of the target enzyme(s) in the cellular environment.
\t described in: Systems-level interactions between insulin-EGF networks amplify mitogenic signaling. \t Borisov N, Aksamitiene E, Kiyatkin A, Legewie S, Berkhout J, Maiwald T, Kaimachnikov NP, Timmer J, Hoek JB, Kholodenko BN.;Mol Syst Biol. 2009;5:256. Epub 2009 Apr 7. PMID:19357636; doi:10.1038/msb.2009.19 Abstract: \t Crosstalk mechanisms have not been studied as thoroughly as individual signaling pathways. We exploit experimental and computational approaches to reveal how a concordant interplay between the insulin and epidermal growth factor (EGF) signaling networks can potentiate mitogenic signaling. In HEK293 cells, insulin is a poor activator of the Ras/ERK (extracellular signal-regulated kinase) cascade, yet it enhances ERK activation by low EGF doses. We find that major crosstalk mechanisms that amplify ERK signaling are localized upstream of Ras and at the Ras/Raf level. Computational modeling unveils how critical network nodes, the adaptor proteins GAB1 and insulin receptor substrate (IRS), Src kinase, and phosphatase SHP2, convert insulin-induced increase in the phosphatidylinositol-3,4,5-triphosphate (PIP(3)) concentration into enhanced Ras/ERK activity. The model predicts and experiments confirm that insulin-induced amplification of mitogenic signaling is abolished by disrupting PIP(3)-mediated positive feedback via GAB1 and IRS. We demonstrate that GAB1 behaves as a non-linear amplifier of mitogenic responses and insulin endows EGF signaling with robustness to GAB1 suppression. Our results show the feasibility of using computational models to identify key target combinations and predict complex cellular responses to a mixture of external cues. \t
\t An extracellular compartment with 34 times the volume of the cell was added and the association rate as well as the dissociation constants for Insulin and EGF binding were altered (kon'=34*kon, KD'=KD/34). This was done to allow using the concentrations for those species given in the article and retaining the same dynamics and Ligand depletion as in the matlab file the SBML file was exported from. \t
SBML model exported from PottersWheel on 2008-10-14 16:26:44.
This a model from the article: Calcium spiking. Meyer T, Stryer L Annu Rev Biophys Biophys Chem1991:20:153-74 1867714, Abstract: No Abstract Available
The IP3-Ca2+ Crosscoupling Model (ICC) is reviewed by Meyer and Stryer in 1991, originally from Meyer and Stryer, 1988. PMID - 2455890 Parameters refer to figures 5 and 6 of the article which were reproduced by using Copasi 4.5 (Build 30).Species CaI and IP3 are buffered to 1% and 50% percent, respectively.
This is the basic model described in eq. 1 of the article: A model of phosphofructokinase and glycolytic oscillations in the pancreatic beta-cell. Westermark PO and Lansner A. Biophys J. 2003 Jul;85(1):126-39. PMID: 12829470, doi:10.1016/S0006-3495(03)74460-9 Abstract: We have constructed a model of the upper part of the glycolysis in the pancreatic beta-cell. The model comprises the enzymatic reactions from glucokinase to glyceraldehyde-3-phosphate dehydrogenase (GAPD). Our results show, for a substantial part of the parameter space, an oscillatory behavior of the glycolysis for a large range of glucose concentrations. We show how the occurrence of oscillations depends on glucokinase, aldolase and/or GAPD activities, and how the oscillation period depends on the phosphofructokinase activity. We propose that the ratio of glucokinase and aldolase and/or GAPD activities are adequate as characteristics of the glucose responsiveness, rather than only the glucokinase activity. We also propose that the rapid equilibrium between different oligomeric forms of phosphofructokinase may reduce the oscillation period sensitivity to phosphofructokinase activity. Methodologically, we show that a satisfying description of phosphofructokinase kinetics can be achieved using the irreversible Hill equation with allosteric modifiers. We emphasize the use of parameter ranges rather than fixed values, and the use of operationally well-defined parameters in order for this methodology to be feasible. The theoretical results presented in this study apply to the study of insulin secretion mechanisms, since glycolytic oscillations have been proposed as a cause of oscillations in the ATP/ADP ratio which is linked to insulin secretion.
This is a model of NFkB pathway functioning from hierarchy of models of decreasing complexity,created to demonstrate application of model reduction methods proposed in
This a model from the article: Robust simplifications of multiscale biochemical networks. Radulescu O, Gorban A., Zinovyev A., Lilienbaum. A. BMC Syst Biol2008:2:86 18854041, Abstract: BACKGROUND: Cellular processes such as metabolism, decision making in development and differentiation, signalling, etc., can be modeled as large networks of biochemical reactions. In order to understand the functioning of these systems, there is a strong need for general model reduction techniques allowing to simplify models without loosing their main properties. In systems biology we also need to compare models or to couple them as parts of larger models. In these situations reduction to a common level of complexity is needed. RESULTS: We propose a systematic treatment of model reduction of multiscale biochemical networks. First, we consider linear kinetic models, which appear as \"pseudo-monomolecular\" subsystems of multiscale nonlinear reaction networks. For such linear models, we propose a reduction algorithm which is based on a generalized theory of the limiting step that we have developed in 1. Second, for non-linear systems we develop an algorithm based on dominant solutions of quasi-stationarity equations. For oscillating systems, quasi-stationarity and averaging are combined to eliminate time scales much faster and much slower than the period of the oscillations. In all cases, we obtain robust simplifications and also identify the critical parameters of the model. The methods are demonstrated for simple examples and for a more complex model of NF-kappaB pathway. CONCLUSION: Our approach allows critical parameter identification and produces hierarchies of models. Hierarchical modeling is important in \"middle-out\" approaches when there is need to zoom in and out several levels of complexity. Critical parameter identification is an important issue in systems biology with potential applications to biological control and therapeutics. Our approach also deals naturally with the presence of multiple time scales, which is a general property of systems biology models.
This model is originally proposed by Lipniacki 2004 (Lipniacki T, Paszek P, Brasier AR, Luxon B, Kimmel M.(2004). Mathematical model of NF-kappaB regulatory module. J. Theor. Biol. 228 (2): 195-215. 15094015
The models are provided in CellDesigner v3.5format. The name of the model M(x,y,z) should bedeciphered as following:
x - number of speciesy - number of reactionsz - number of parameters
Simulation protocol:The model can be simulated in CellDesignerdirectly, or in any simulator supportingevents. The simulation period should beset up in 20 hours (t=72000 sec). This model reproduces Figure 3b (M(14,25,28)) of the publication.
For additional information please contactAndrei.Zinovyev at curie.fr
This is a model of NFkB pathway functioning from hierarchy of models of decreasing complexity,created to demonstrate application of model reduction methods proposed in
Robust simplifications of multiscale biochemical networks. Radulescu O, Gorban A., Zinovyev A., Lilienbaum. A. BMC Syst Biol2008:2:86 18854041, Abstract: BACKGROUND: Cellular processes such as metabolism, decision making in development and differentiation, signalling, etc., can be modeled as large networks of biochemical reactions. In order to understand the functioning of these systems, there is a strong need for general model reduction techniques allowing to simplify models without loosing their main properties. In systems biology we also need to compare models or to couple them as parts of larger models. In these situations reduction to a common level of complexity is needed. RESULTS: We propose a systematic treatment of model reduction of multiscale biochemical networks. First, we consider linear kinetic models, which appear as \"pseudo-monomolecular\" subsystems of multiscale nonlinear reaction networks. For such linear models, we propose a reduction algorithm which is based on a generalized theory of the limiting step that we have developed in 1. Second, for non-linear systems we develop an algorithm based on dominant solutions of quasi-stationarity equations. For oscillating systems, quasi-stationarity and averaging are combined to eliminate time scales much faster and much slower than the period of the oscillations. In all cases, we obtain robust simplifications and also identify the critical parameters of the model. The methods are demonstrated for simple examples and for a more complex model of NF-kappaB pathway. CONCLUSION: Our approach allows critical parameter identification and produces hierarchies of models. Hierarchical modeling is important in \"middle-out\" approaches when there is need to zoom in and out several levels of complexity. Critical parameter identification is an important issue in systems biology withpotential applications to biological control and therapeutics. Our approach also deals naturally with the presence of multiple time scales, which is a general property of systems biology models.
The models are provided in CellDesigner v3.5format. The name of the model M(x,y,z) should bedeciphered as following:
x - number of speciesy - number of reactionsz - number of parameters
Simulation protocol:The model can be simulated in CellDesignerdirectly, or in any simulator supportingevents. The simulation period should beset up in 40 hours (t=144000 sec).The 'signal' event applies signal to thepathway at the moment t=20 hours=72000 sec. This model reproduces Figure 7c (M(39,65,90)) of the publication.
For additional information please contactAndrei.Zinovyev at curie.fr
This is the extended model described the article: Bifurcation analysis of the regulatory modules of the mammalian G1/S transition. Swat M, Kel A, Herzel H. Bioinformatics 2004 Jul 10;20(10):1506-11. PMID: 15231543 , doi: 10.1093/bioinformatics/bth110 Abstract: MOTIVATION: Mathematical models of the cell cycle can contribute to an understanding of its basic mechanisms. Modern simulation tools make the analysis of key components and their interactions very effective. This paper focuses on the role of small modules and feedbacks in the gene-protein network governing the G1/S transition in mammalian cells. Mutations in this network may lead to uncontrolled cell proliferation. Bifurcation analysis helps to identify the key components of this extremely complex interaction network. RESULTS: We identify various positive and negative feedback loops in the network controlling the G1/S transition. It is shown that the positive feedback regulation of E2F1 and a double activator-inhibitor module can lead to bistability. Extensions of the core module preserve the essential features such as bistability. The complete model exhibits a transcritical bifurcation in addition to bistability. We relate these bifurcations to the cell cycle checkpoint and the G1/S phase transition point. Thus, core modules can explain major features of the complex G1/S network and have a robust decision taking function.
This model originates from BioModels Database: A Database of Annotated Published Models. It is copyright (c) 2005-2010 The BioModels Team. To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
In summary, you are entitled to use this encoded model in absolutely any manner you deem suitable, verbatim, or with modification, alone or embedded it in a larger context, redistribute it, commercially or not, in a restricted way or not..
This a model from the article: Quantifying robustness of biochemical network models. Ma L, Iglesias PA. BMC Bioinformatics.2002 Dec 13;3:38. 12482327, Abstract: BACKGROUND: Robustness of mathematical models of biochemical networks is important for validation purposes and can be used as a means of selecting between different competing models. Tools for quantifying parametric robustness are needed. RESULTS: Two techniques for describing quantitatively the robustness of an oscillatory model were presented and contrasted. Single-parameter bifurcation analysis was used to evaluate the stability robustness of the limit cycle oscillation as well as the frequency and amplitude of oscillations. A tool from control engineering--the structural singular value (SSV)--was used to quantify robust stability of the limit cycle. Using SSV analysis, we find very poor robustness when the model's parameters are allowed to vary. CONCLUSION: The results show the usefulness of incorporating SSV analysis to single parameter sensitivity analysis to quantify robustness.
This model is originally proposed by Laub and Loomis (1998).[Laub MT, Loomis WF (1998). A molecular network that produces spontaneous oscillations in excitable cells of Dictyostelium. Mol Biol Cell. 9(12):3521-32. PubMED: 12482327. The parameters used in this model (Ma and Iglesias, 2002), are different from that used in the original model (Laub and Loomis, 1998), because of the typographical errors in the original paper. The parameters used in the model presented by Ma and Iglesias, are obtained directly from the authors of original publication (Laub and Loomis, 1998). These parameters are also used in the website for the Laub-Loomis model, http://www-biology.ucsd.edu/labs/loomis/network/laubloomis.html. By using this model, Kim et al., 2006 [Kim J, Bates DG, Postlethwaite I, Ma L, Iglesias PA. (2006) Robustness analysis of biochemical network models. Syst Biol (Stevenage). 153(3):96-104. PubMED: 16984084], validate and extend the analysis approach proposed by Ma and Iglesias (2002), by showing how hybrid optimisation can be used to compute worst-case parameter combinations in the model.
This a model from the article: Sensitivity analysis of parameters controlling oscillatory signalling in the NF-kappaB pathway: the roles of IKK and IkappaBalpha. Ihekwaba AE, Broomhead DS, Grimley RL, Benson N, Kell DB Syst Biol (Stevenage) [2004 Jun;1(1):93-103 17052119 , Abstract: Analysis of cellular signalling interactions is expected to create an enormous informatics challenge, perhaps even greater than that of analysing the genome. A key step in the evolution towards a more quantitative understanding of signalling is to specify explicitly the kinetics of all chemical reaction steps in a pathway. We have reconstructed a model of the nuclear factor, kappaB (NF-kappaB) signalling pathway, containing 64 parameters and 26 variables, including steps in which the activation of the NF-kappaB transcription factor is intimately associated with the phosphorylation and ubiquitination of its inhibitor kappaB by a membrane-associated kinase, and its translocation from the cytoplasm to the nucleus. We apply sensitivity analysis to the model. This identifies those parameters in this (IkappaB)/NF-kappaB signalling system (containing only induced IkappaBalpha isoform) that most affect the oscillatory concentration of nuclear NF-kappaB (in terms of both period and amplitude). The intention is to provide guidance on which proteins are likely to be most significant as drug targets or should be exploited for further, more detailed experiments. The sensitivity coefficients were found to be strongly dependent upon the magnitude of the parameter change studied, indicating the highly non-linear nature of the system. Of the 64 parameters in the model, only eight to nine exerted a major control on nuclear NF-kappaB oscillations, and each of these involved as reaction participants either the IkappaB kinase (IKK) or IkappaBalpha, directly. This means that the dominant dynamics of the pathway can be reflected, in addition to that of nuclear NF-kappaB itself, by just two of the other pathway variables. This is conveniently observed in a phase-plane plot.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
In summary, you are entitled to use this encoded model in absolutely any manner you deem suitable, verbatim, or with modification, alone or embedded it in a larger context, redistribute it, commercially or not, in a restricted way or not.
This a model from the article: A kinetic study of a ternary cycle between adenine nucleotides. Valero E, Var\u00f3n R, Garc\u00eda-Carmona F FEBS J. [2006 Aug;273(15):3598-613 16884499 , Abstract: In the present paper, a kinetic study is made of the behavior of a moiety-conserved ternary cycle between the adenine nucleotides. The system contains the enzymes S-acetyl coenzyme A synthetase, adenylate kinase and pyruvate kinase, and converts ATP into AMP, then into ADP and finally back to ATP. L-Lactate dehydrogenase is added to the system to enable continuous monitoring of the progress of the reaction. The cycle cannot work when the only recycling substrate in the reaction medium is AMP. A mathematical model is proposed whose kinetic behavior has been analyzed both numerically by integration of the nonlinear differential equations describing the kinetics of the reactions involved, and analytically under steady-state conditions, with good agreement with the experimental results being obtained. The data obtained showed that there is a threshold value of the S-acetyl coenzyme A synthetase/adenylate kinase ratio, above which the cycle stops because all the recycling substrate has been accumulated as AMP, never reaching the steady state. In addition, the concept of adenylate energy charge has been applied to the system, obtaining the enabled values of the rate constants for a fixed adenylate energy charge value and vice versa.
This a model from the article: Mitochondrial energetic metabolism: a simplified model of TCA cycle with ATP production. Nazaret C, Heiske M, Thurley K, Mazat JP J. Theor. Biol. 2009 Jun;258(3):455-64 19007794 , Abstract: Mitochondria play a central role in cellular energetic metabolism. The essential parts of this metabolism are the tricarboxylic acid (TCA) cycle, the respiratory chain and the adenosine triphosphate (ATP) synthesis machinery. Here a simplified model of these three metabolic components with a limited set of differential equations is presented. The existence of a steady state is demonstrated and results of numerical simulations are presented. The relevance of a simple model to represent actual in vivo behavior is discussed.
This a model from the article: The smallest chemical reaction system with bistability Thomas Wilhelm BMC Systems Biology2009;Sep 8;3:90. 19737387, Abstract: Background Bistability underlies basic biological phenomena, such as cell division, differentiation, cancer onset, and apoptosis. So far biologists identified two necessary conditions for bistability: positive feedback and ultrasensitivity. Results Biological systems are based upon elementary mono- and bimolecular chemical reactions. In order to definitely clarify all necessary conditions for bistability we here present the corresponding minimal system. According to our definition, it contains the minimal number of (i) reactants, (ii) reactions, and (iii) terms in the corresponding ordinary differential equations (decreasing importance from i-iii). The minimal bistable system contains two reactants and four irreversible reactions (three bimolecular, one monomolecular).We discuss the roles of the reactions with respect to the necessary conditions for bistability: two reactions comprise the positive feedback loop, a third reaction filters out small stimuli thus enabling a stable 'off' state, and the fourth reaction prevents explosions. We argue that prevention of explosion is a third general necessary condition for bistability, which is so far lacking discussion in the literature.Moreover, in addition to proving that in two-component systems three steady states are necessary for bistability (five for tristability, etc.), we also present a simple general method to design such systems: one just needs one production and three different degradation mechanisms (one production, five degradations for tristability, etc.). This helps modelling multistable systems and it is important for corresponding synthetic biology projects. Conclusion The presented minimal bistable system finally clarifies the often discussed question for the necessary conditions for bistability. The three necessary conditions are: positive feedback, a mechanism to filter out small stimuli and a mechanism to prevent explosions. This is important for modelling bistability with simple systems and for synthetically designing new bistable systems. Our simple model system is also well suited for corresponding teaching purposes.
This is a Systems Biology Markup Language (SBML) file, generated by MathSBML 2.9.0 [8-Oct-2008] 30-Jun-2009 17:26:58(GMT+00:59). SBML is a form of XML, and most XML files will not display properly in an internet browser. To view the contents of an XML file use the \"Page Source\" or equivalent button on you browser.
PURPOSE: This tumor response pharmacodynamic model aims to describe primary lesion shrinkage in non-small cell lung cancer over time and determine if concentration-based exposure metrics for gemcitabine or that of its metabolites,n2',2'-difluorodeoxyuridine or gemcitabine triphosphate, are better than gemcitabine dose for prediction of individual response. EXPERIMENTAL DESIGN: Gemcitabine was given thrice weekly on days 1 and 8 in combination with carboplatin, which was given only on day 1 of every cycle. Gemcitabine amount in the body and area under the concentration-time curves of plasma gemcitabine, 2',2'-difluorodeoxyuridine, and intracellular gemcitabine triphosphate in white cells were compared to determine which best describes tumor shrinkage over time. Tumor growth kinetics were described using a Gompertz-like model.RESULTS: The apparent half-life for the effect of gemcitabine was 7.67 weeks. The tumor turnover time constant was 21.8 week.cm. Baseline tumor size and gemcitabine amount in the body to attain 50% of tumor shrinkage were estimated to be 6.66 cm and 10,600 mg. There was no evidence of relapse during treatment.
This a model from the article: Monte Carlo analysis of an ODE Model of the Sea Urchin Endomesoderm Network. K\u00fchn C, Wierling C, K\u00fchn A, Klipp E, Panopoulou G, Lehrach H, Poustka AJ. BMC Syst Biol.2009 Aug 23;3:83. 19698179, Abstract: BACKGROUND: Gene Regulatory Networks (GRNs) control the differentiation, specification and function of cells at the genomic level. The levels of interactions within large GRNs are of enormous depth and complexity. Details about many GRNs are emerging, but in most cases it is unknown to what extent they control a given process, i.e. the grade of completeness is uncertain. This uncertainty stems from limited experimental data, which is the main bottleneck for creating detailed dynamical models of cellular processes. Parameter estimation for each node is often infeasible for very large GRNs. We propose a method, based on random parameter estimations through Monte-Carlo simulations to measure completeness grades of GRNs. RESULTS: We developed a heuristic to assess the completeness of large GRNs, using ODE simulations under different conditions and randomly sampled parameter sets to detect parameter-invariant effects of perturbations. To test this heuristic, we constructed the first ODE model of the whole sea urchin endomesoderm GRN, one of the best studied large GRNs. We find that nearly 48% of the parameter-invariant effects correspond with experimental data, which is 65% of the expected optimal agreement obtained from a submodel for which kinetic parameters were estimated and used for simulations. Randomized versions of the model reproduce only 23.5% of the experimental data. CONCLUSION: The method described in this paper enables an evaluation of network topologies of GRNs without requiring any parameter values. The benefit of this method is exemplified in the first mathematical analysis of the complete Endomesoderm Network Model. The predictions we provide deliver candidate nodes in the network that are likely to be erroneous or miss unknown connections, which may need additional experiments to improve the network topology. This mathematical model can serve as a scaffold for detailed and more realistic models. We propose that our method can be used to assess a completeness grade of any GRN. This could be especially useful for GRNs involved in human diseases, where often the amount of connectivity is unknown and/or many genes/interactions are missing.
The paper describes several models, Mi, i=1...n, where M0 correspond to the unperturbed model and all the others correspond to the perturbed model. This model is the unperturbed model. The model reproduces figure 5 of the reference publication. The figures were generated by running 1 simulation, whereas in the paper the plotted values are the means of 800 simulations using randomly samples parameter sets. Additional information from the Author: The parameter that were randomly samples are the transcription parameters c_Proteins... and k_Proteins. The parameter were sampled from a lognormal distribution with sigma = 1.5 and mu = 0.5
This is the extended model described in eq. 2 of the article: A model of phosphofructokinase and glycolytic oscillations in the pancreatic beta-cell. Westermark PO and Lansner A. Biophys J. 2003 Jul;85(1):126-39. PMID: 12829470, doi:10.1016/S0006-3495(03)74460-9 Abstract: We have constructed a model of the upper part of the glycolysis in the pancreatic beta-cell. The model comprises the enzymatic reactions from glucokinase to glyceraldehyde-3-phosphate dehydrogenase (GAPD). Our results show, for a substantial part of the parameter space, an oscillatory behavior of the glycolysis for a large range of glucose concentrations. We show how the occurrence of oscillations depends on glucokinase, aldolase and/or GAPD activities, and how the oscillation period depends on the phosphofructokinase activity. We propose that the ratio of glucokinase and aldolase and/or GAPD activities are adequate as characteristics of the glucose responsiveness, rather than only the glucokinase activity. We also propose that the rapid equilibrium between different oligomeric forms of phosphofructokinase may reduce the oscillation period sensitivity to phosphofructokinase activity. Methodologically, we show that a satisfying description of phosphofructokinase kinetics can be achieved using the irreversible Hill equation with allosteric modifiers. We emphasize the use of parameter ranges rather than fixed values, and the use of operationally well-defined parameters in order for this methodology to be feasible. The theoretical results presented in this study apply to the study of insulin secretion mechanisms, since glycolytic oscillations have been proposed as a cause of oscillations in the ATP/ADP ratio which is linked to insulin secretion.
This a model from the article: A modelling approach to quantify dynamic crosstalk between the pheromone and the starvation pathway in baker's yeast. Schaber J, Kofahl B, Kowald A, Klipp E FEBS J.2006 Aug; 273(15):3520-33 16884493, Abstract: Cells must be able to process multiple information in parallel and, moreover, they must also be able to combine this information in order to trigger the appropriate response. This is achieved by wiring signalling pathways such that they can interact with each other, a phenomenon often called crosstalk. In this study, we employ mathematical modelling techniques to analyse dynamic mechanisms and measures of crosstalk. We present a dynamic mathematical model that compiles current knowledge about the wiring of the pheromone pathway and the filamentous growth pathway in yeast. We consider the main dynamic features and the interconnections between the two pathways in order to study dynamic crosstalk between these two pathways in haploid cells. We introduce two new measures of dynamic crosstalk, the intrinsic specificity and the extrinsic specificity. These two measures incorporate the combined signal of several stimuli being present simultaneously and seem to be more stable than previous measures. When both pathways are responsive and stimulated, the model predicts that (a) the filamentous growth pathway amplifies the response of the pheromone pathway, and (b) the pheromone pathway inhibits the response of filamentous growth pathway in terms of mitogen activated protein kinase activity and transcriptional activity, respectively. Among several mechanisms we identified leakage of activated Ste11 as the most influential source of crosstalk. Moreover, we propose new experiments and predict their outcomes in order to test hypotheses about the mechanisms of crosstalk between the two pathways. Studying signals that are transmitted in parallel gives us new insights about how pathways and signals interact in a dynamical way, e.g., whether they amplify, inhibit, delay or accelerate each other.
This a model from the article: PKPD model of interleukin-21 effects on thermoregulation in monkeys--application and evaluation of stochastic differential equations. Overgaard RV, Holford N, Rytved KA, Madsen H. Pharm Res.2007 Feb;24(2):298-309. PUBMED, Abstract: PURPOSE: To describe the pharmacodynamic effects of recombinant human interleukin-21 (IL-21) on core body temperature in cynomolgus monkeys using basic mechanisms of heat regulation. A major effort was devoted to compare the use of ordinary differential equations (ODEs) with stochastic differential equations (SDEs) in pharmacokinetic pharmacodynamic (PKPD) modelling. METHODS: A temperature model was formulated including circadian rhythm, metabolism, heat loss, and a thermoregulatory set-point. This model was formulated as a mixed-effects model based on SDEs using NONMEM. RESULTS: The effects of IL-21 were on the set-point and the circadian rhythm of metabolism. The model was able to describe a complex set of IL-21 induced phenomena, including 1) disappearance of the circadian rhythm, 2) no effect after first dose, and 3) high variability after second dose. SDEs provided a more realistic description with improved simulation properties, and further changed the model into one that could not be falsified by the autocorrelation function. CONCLUSIONS: The IL-21 induced effects on thermoregulation in cynomolgus monkeys are explained by a biologically plausible model. The quality of the model was improved by the use of SDEs.
The construction and characterization of a core kinetic model of the glucose-stimulated insulin secretion system (GSIS) in pancreatic beta cells is described. The model consists of 44 enzymatic reactions, 59 metabolic state variables, and 272 parameters. It integrates five subsystems: glycolysis, the TCA cycle, the respiratory chain, NADH shuttles, and the pyruvate cycle. It also takes into account compartmentalization of the reactions in the cytoplasm and mitochondrial matrix. The model shows expected behavior in its outputs, including the response of ATP production to starting glucose concentration and the induction of oscillations of metabolite concentrations in the glycolytic pathway and in ATP and ADP concentrations. Identification of choke points and parameter sensitivity analysis indicate that the glycolytic pathway, and to a lesser extent the TCA cycle, are critical to the proper behavior of the system, while parameters in other components such as the respiratory chain are less critical. Notably, however, sensitivity analysis identifies the first reactions of nonglycolytic pathways as being important for the behavior of the system. The model is robust to deletion of malic enzyme activity, which is absent in mouse pancreatic beta cells. The model represents a step toward the construction of a model with species-specific parameters that can be used to understand mouse models of diabetes and the relationship of these mouse models to the human disease state.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
This a model from the article: Transient heterogeneity in extracellular protease production by Bacillus subtilis. Veening JW, Igoshin OA, Eijlander RT, Nijland R, Hamoen LW, Kuipers OP Mol. Syst. Biol. 2008 ; Volume: 4 : 184 18414485, Abstract: The most sophisticated survival strategy Bacillus subtilis employs is the differentiation of a subpopulation of cells into highly resistant endospores. To examine the expression patterns of non-sporulating cells within heterogeneous populations, we used buoyant density centrifugation to separate vegetative cells from endospore-containing cells and compared the transcriptome profiles of both subpopulations. This demonstrated the differential expression of various regulons. Subsequent single-cell analyses using promoter-gfp fusions confirmed our microarray results. Surprisingly, only part of the vegetative subpopulation highly and transiently expresses genes encoding the extracellular proteases Bpr (bacillopeptidase) and AprE (subtilisin), both of which are under the control of the DegU transcriptional regulator. As these proteases and their degradation products freely diffuse within the liquid growth medium, all cells within the clonal population are expected to benefit from their activities, suggesting that B. subtilis employs cooperative or even altruistic behavior. To unravel the mechanisms by which protease production heterogeneity within the non-sporulating subpopulation is established, we performed a series of genetic experiments combined with mathematical modeling. Simulations with our model yield valuable insights into how population heterogeneity may arise by the relatively long and variable response times within the DegU autoactivating pathway.
\t described in: Pharmacokinetic-pharmacodynamic modeling of caffeine: Tolerance to pressor effects \t Shi J, Benowitz NL, Denaro CP and Sheiner LB. ;Clin. Pharmacol. Ther. 1993 Jan;53(1):6-14. PMID:8422743; Abstract: \t We propose a parametric pharmacokinetic-pharmacodynamic model for caffeine that quantifies the development of tolerance to the pressor effect of the drug and characterizes the mean behavior and inter-individual variation of both pharmacokinetics and pressor effect. Our study in a small group of subjects indicates that acute tolerance develops to the pressor effect of caffeine and that both the pressor effect and tolerance occur after some time delay relative to changes in plasma caffeine concentration. The half-life of equilibration of effect with plasma caffeine concentration is about 20 minutes. The half-life of development and regression of tolerance is estimated to be about 1 hour, and the model suggests that tolerance, at its fullest, causes more than a 90 percent reduction of initial (nontolerant) effect. Whereas tolerance to the pressor effect of caffeine develops in habitual coffee drinkers, the pressor response is regained after relatively brief periods of abstinence. Because of the rapid development and regression of tolerance, the pressor response to caffeine depends on how much caffeine is consumed, the schedule of consumption, and the elimination half-life of caffeine. \t
Caffeine intake in this version is modelled as cups of coffee drunk at regular intervals (parameter t_interval). The amount of caffeine per cup is determined by the parameter cupsize. The body weight of the person drinking is given by the parameter bodyweight. The even coffee cup occures delayed to the drinking of each cup, as the availability of the caffeine in the digestive tract is assumed to be delayed to the ingestion by the time t_lag.
This a model from the article: Theoretical and experimental evidence for hysteresis in cell proliferation. Bai S, Goodrich D, Thron CD, Tecarro E, Obeyesekere M. Cell Cycle. 2003 Jan-Feb;2(1):46-52. 12695688 , Abstract: We propose a mathematical model for the regulation of the G1-phase of the mammalian cell cycle taking into account interactions of cyclin D/cdk4, cyclin E/cdk2, Rb and E2F. Mathematical analysis of this model predicts that a change in the proliferative status in response to a change in concentrations of serum growth factors will exhibit the property of hysteresis: the concentration of growth factors required to induce proliferation is higher than the concentration required to maintain proliferation. We experimentally confirmed this prediction in mouse embryonic fibroblasts in vitro. In agreement with the mathematical model, this indicates that changes in proliferative mode caused by small changes in concentrations of growth factors are not easily reversible. Based on this study, we discuss the importance of proliferation hysteresis for cell cycle regulation.
The original model was taken from the Cell Cycle DataBase (CCDB).
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
In summary, you are entitled to use this encoded model in absolutely any manner you deem suitable, verbatim, or with modification, alone or embedded it in a larger context, redistribute it, commercially or not, in a restricted way or not.
\t This is the reduced model (model 8) described in: Dynamics within the CD95 death-inducing signaling complex decide life and death of cells. Leo Neumann, Carina Pforr, Joel Beaudouin, Alexander Golks, Peter H. Krammer, Inna N. Lavrik and Roland Eils (German Cancer Research Center (DKFZ), http://www.dkfz.de);Mol Sys Biol2010;6:352. doi:10.1038/msb.2010.6;
Abstract: This study explores the dilemma in cellular signaling that triggering of CD95 (Fas/APO-1) in some situations results in cell death and in others leads to the activation of NF-\u03baB. We established an integrated kinetic mathematical model for CD95-mediated apoptotic and NF-\u03baB signaling. Systematic model reduction resulted in a surprisingly simple model well approximating experimentally observed dynamics. The model postulates a new link between c-FLIPL cleavage in the death-inducing signaling complex (DISC) and the NF-\u03baB pathway. We validated experimentally that CD95 stimulation resulted in an interaction of p43-FLIP with the IKK complex followed by its activation. Furthermore, we showed that the apoptotic and NF-\u03baB pathways diverge already at the DISC. Model and experimental analysis of DISC formation showed that a subtle balance of c-FLIPL and procaspase-8 determines life/death decisions in a nonlinear manner. We present an integrated model describing the complex dynamics of CD95-mediated apoptosis and NF-\u03baB signaling.
The original was taken from the MSB article supplementary material site msb20106-s2.xml. All the species ids were changed since the model was not a valid SBML with its original ids - Lukas.
Notes added to the species [L] (the initial concentration of Anti-CD95), regarding changes to be made in the initial concentration of [L], to obtain figure 5D.
\t This is the model described in: Bacterial adaptation through distributed sensing of metabolic fluxes \tOliver Kotte, Judith B Zaugg and Matthias Heinemann;Mol Sys Biol2010;6:355. doi:10.1038/msb.2010.10; Abstract: \t The recognition of carbon sources and the regulatory adjustments to recognized changes are of particular importance for bacterial survival in fluctuating environments. Despite a thorough knowledge base of Escherichia coli's central metabolism and its regulation, fundamental aspects of the employed sensing and regulatory adjustment mechanisms remain unclear. In this paper, using a differential equation model that couples enzymatic and transcriptional regulation of E. coli's central metabolism, we show that the interplay of known interactions explains in molecular-level detail the system-wide adjustments of metabolic operation between glycolytic and gluconeogenic carbon sources. We show that these adaptations are enabled by an indirect recognition of carbon sources through a mechanism we termed distributed sensing of intracellular metabolic fluxes. This mechanism uses two general motifs to establish flux-signaling metabolites, whose bindings to transcription factors form flux sensors. As these sensors are embedded in global feedback loop architectures, closed-loop self-regulation can emerge within metabolism itself and therefore, metabolic operation may adapt itself autonomously (not requiring upstream sensing and signaling) to fluctuating carbon sources.\t
In its current form this SBML model is parametrized for the glucose to acetate transition and to simulate the extended diauxic shift as shown in figure 3 and scenario 6 of the attached matlab file. In this scenario the cells first are grown from an OD600 (BM) of 0.03 with a starting glucose concentration of 0.5 g/l for 8.15 h (29340 sec). Then a medium containing 5 g/l acetate is inoculated with these cells to an OD600 of 0.03 and grown for another 19.7 hours (70920 sec). Finally the cells are shifted to a medium containing both glucose and acetate at a concentration of 3 g/l with a starting OD600 of 0.0005. The shifts where implemented using events triggering at the times determined by the parameters shift1 and shift2 (in hours). To simulate other scenarios the initial conditions need to be changed as described in the supplemental materials (supplement 1) The original SBML model and the MATLAB file used for the calculations can be down loaded as supplementary materials of the publication from the MSB website. (supplement 2).
The units of the external metabolites are in [g/l], those of the biomass in optical density,OD600, taken as dimensionless, and [micromole/(gramm dry weight)] for all intracellular metabolites. As the latter cannot be implemented in SBML, it was chosen to be micromole only and the units of the parameters are left mostly undefined.
This the model from the article: A biochemically structured model for Saccharomyces cerevisiae. Lei F, Rotb\u00f8ll M, J\u00f8rgensen SB. J Biotechnol. 2001 Jul 12;88(3):205-21. \t PMID: 11434967 ,DOI: 10.1016/S0168-1656(01)00269-3
Abstract: A biochemically structured model for the aerobic growth of Saccharomyces cerevisiae on glucose and ethanol is presented. The model focuses on the pyruvate and acetaldehyde branch points where overflow metabolism occurs when the growth changes from oxidative to oxido-reductive. The model is designed to describe the onset of aerobic alcoholic fermentation during steady-state as well as under dynamical conditions, by triggering an increase in the glycolytic flux using a key signalling component which is assumed to be closely related to acetaldehyde. An investigation of the modelled process dynamics in a continuous cultivation revealed multiple steady states in a region of dilution rates around the transition between oxidative and oxido-reductive growth. A bifurcation analysis using the two external variables, the dilution rate, D, and the inlet concentration of glucose, S(f), as parameters, showed that a fold bifurcation occurs close to the critical dilution rate resulting in multiple steady-states. The region of dilution rates within which multiple steady states may occur depends strongly on the substrate feed concentration. Consequently a single steady state may prevail at low feed concentrations, whereas multiple steady states may occur over a relatively wide range of dilution rates at higher feed concentrations.
This the single cell model from the article: A multiscale model to investigate circadian rhythmicity of pacemaker neurons in the suprachiasmatic nucleus. Vasalou C, Henson MA. PLoS Comput Biol 2010 Mar 12;6(3):e1000706.\t PMID: 20300645 , DOI: 10.1371/journal.pcbi.1000706 ;
Abstract: The suprachiasmatic nucleus (SCN) of the hypothalamus is a multicellular system that drives daily rhythms in mammalian behavior and physiology. Although the gene regulatory network that produces daily oscillations within individual neurons is well characterized, less is known about the electrophysiology of the SCN cells and how firing rate correlates with circadian gene expression. We developed a firing rate code model to incorporate known electrophysiological properties of SCN pacemaker cells, including circadian dependent changes in membrane voltage and ion conductances. Calcium dynamics were included in the model as the putative link between electrical firing and gene expression. Individual ion currents exhibited oscillatory patterns matching experimental data both in current levels and phase relationships. VIP and GABA neurotransmitters, which encode synaptic signals across the SCN, were found to play critical roles in daily oscillations of membrane excitability and gene expression. Blocking various mechanisms of intracellular calcium accumulation by simulated pharmacological agents (nimodipine, IP3- and ryanodine-blockers) reproduced experimentally observed trends in firing rate dynamics and core-clock gene transcription. The intracellular calcium concentration was shown to regulate diverse circadian processes such as firing frequency, gene expression and system periodicity. The model predicted a direct relationship between firing frequency and gene expression amplitudes, demonstrated the importance of intracellular pathways for single cell behavior and provided a novel multiscale framework which captured characteristics of the SCN at both the electrophysiological and gene regulatory levels.
Originally created by libAntimony v1.3 (using libSBML 4.1.0-b1)
This is the model with unfitted parameters described in the article Dynamic rerouting of the carbohydrate flux is key to counteracting oxidative stress Markus Ralser, Mirjam M Wamelink, Axel Kowald, Birgit Gerisch, Gino Heeren, Eduard A Struys, Edda Klipp, Cornelis Jakobs, Michael Breitenbach, Hans Lehrach and Sylvia Krobitsch, J Biol 2007 6(4):10; PMID: 18154684 , doi: 10.1186/jbiol61 Abstract: BACKGROUND: Eukaryotic cells have evolved various response mechanisms to counteract the deleterious consequences of oxidative stress. Among these processes, metabolic alterations seem to play an important role. RESULTS: We recently discovered that yeast cells with reduced activity of the key glycolytic enzyme triosephosphate isomerase exhibit an increased resistance to the thiol-oxidizing reagent diamide. Here we show that this phenotype is conserved in Caenorhabditis elegans and that the underlying mechanism is based on a redirection of the metabolic flux from glycolysis to the pentose phosphate pathway, altering the redox equilibrium of the cytoplasmic NADP(H) pool. Remarkably, another key glycolytic enzyme, glyceraldehyde-3-phosphate dehydrogenase (GAPDH), is known to be inactivated in response to various oxidant treatments, and we show that this provokes a similar redirection of the metabolic flux. CONCLUSION: The naturally occurring inactivation of GAPDH functions as a metabolic switch for rerouting the carbohydrate flux to counteract oxidative stress. As a consequence, altering the homoeostasis of cytoplasmic metabolites is a fundamental mechanism for balancing the redox state of eukaryotic cells under stress conditions.
Different realtive enzyme velocities can be simulated by varying the parameters k_rel_TPI and k_rel_GAPDH .
This file describes the SBML version of the mathematical model in the following journal article: Linking Pulmonary Oxygen Uptake, Muscle Oxygen Utilization and Cellular Metabolism during Exercise, Ann Biomed Eng. 2007 Jun;35(6):956-69. (Pubmed ID: 17380394). This mathematical model simulates oxygen transport and metabolism in skeletal muscle in response to a step change from a warm-up steady state to a higher work rate corresponding to exercise at different levels of intensity: moderate (M), heavy (H) and very heavy (VH). The model parameter values are listed in the tables of this article. The parameter values that are independent of the exercise level are reported in Table 2. The parameter values that depend on the exercise level are reported in Tables 1A, 3 and 4. The model simulations (Figures 2, 3, 4 and 5) were obtained for a representative subject with a set of parameter values different from those in Table 1A, 3 and 4. In the sbml model, these model parameters are used to simulate exercise at a very heavy (VH) intensity for the representative subject. Additionally, the parameter values needed to simulate exercise at moderate (M) and heavy (H) intensity are reported in the list of parameters of the file. The model simulates dynamics of (1) the concentrations of free (F) and total (T) oxygen concentration in blood (CFcap, CTcap) and tissue (CFtis, CTtis), Adenosine Triphosphate (ATP), Adenosine Diphosphate (ADP), Phosphocreatine (PCr) and Creatine (Cr); (2) the metabolic flux of oxidative phosphorylation, creatine kinase and ATPase; (3) the oxygen uptake in blood and oxygen transport rate from blood to tissue during exercise. The simulation also computes muscle oxygen saturation (StO2m) and relative muscle oxygen saturation (RStO2m) in order to compare simulated and experimental responses of human muscle oxygenation during exercise. The model was successfully tested with Roadrunner of the Systems Biology Workbench (SBW). The model simulations obtained with Roadrunner match those obtained with the mathematical model represented in Fortran and Matlab for relative and absolute tolerance smaller than 10-7.
To allow for simulations at varying levels of exercise, the parameter exercise_level was introduced. A value of 1 means medium, 2 heavy and 3 very heavy exercise. Setting this parameter assigns the parameters Vmax, KatpaseE, dQMm and tauQm with the relevant parameters. The warmup steady state is influenced by the parameter changes for this representative subject and the model has to be brought into steady state after each change of exercise level.
Models for the diversity and evolution of pathogens have branched into two main directions: the adaptive dynamics of quantitative life-history traits (notably virulence) and the maintenance and invasion of multiple, antigenically diverse strains that interact with the host's immune memory. In a first attempt to reconcile these two approaches, we developed a simple modelling framework where two strains of pathogens, defined by a pair of life-history traits (infectious period and infectivity), interfere through a given level of cross-immunity. We used whooping cough as a potential example, but the framework proposed here could be applied to other acute infectious diseases. Specifically, we analysed the effects of these parameters on the invasion dynamics of one strain into a population, where the second strain is endemic. Whereas the deterministic version of the model converges towards stable coexistence of the two strains in most cases, stochastic simulations showed that transient epidemic dynamics can cause the extinction of either strain. Thus ecological dynamics, modulated by the immune parameters, eventually determine the adaptive value of different pathogen genotypes. We advocate an integrative view of pathogen dynamics at the crossroads of immunology, epidemiology and evolution, as a way towards efficient control of infectious diseases.
This version of the model can be used for both the stochastic and the deterministic simulations described in the article. For deterministic interpretations with infinite population sizes, set the population size\u00a0 N\u00a0= 1. The model reproduces the deterministic time courses. Stochastic interpretation with Copasi UI gave results similar to the article, but was not extensively tested. The initial conditions for competition simulations can be derived by equilibrating the system for one pathogen and then adding a starting concentration for the other.
Originally created by libAntimony v1.3 (using libSBML 4.1.0-b1)
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
This mechanistic model describes the activation of immediate early genes such as cFos after EGF or heregulin (HRG) stimulation of the MAPK pathway. Phosphorylated cFos is a key transcription factor triggering downstream cascades of cell fate determination. The model can explain how the switch-like response of p-cFos emerges from the spatiotemporal dynamics. This mechanistic model comprises the explicit reaction kinetics of the signal transduction pathway, the transcriptional and the posttranslational feedback and feedforward loops. In the below article, two different mechanistic models have been studied, the first one based on previously known interactions but failing to account for the experimental data and the second one including additional interactions which were discovered and confirmed by new experiments. The mechanistic model encoded here is the second one, the extended and at the time of creation most complete model of cell fate decision making in response to different doses of EGF or HRG stimulation. The encoded parameter set corresponds to 10mM HRG stimulation as shown in Fig.1 of the article. The Supplementary Methods of the article provide further parameter sets that allow simulations for different ligands and different doses. A corresponding core model is available from http://www.ebi.ac.uk/biomodels/ as MODEL1003170000.
Ligand-specific c-Fos expression emerges from the spatiotemporal control of ErbB network dynamics. Takashi Nakakuki(1), Marc R. Birtwistle(2,3,4), Yuko Saeki(1,5), Noriko Yumoto(1,5), Kaori Ide(1), Takeshi Nagashima(1,5), Lutz Brusch(6), Babatunde A. Ogunnaike(3), Mariko Hatakeyama(1,5), and Boris N. Kholodenko(2,4); Cell In Press, online 20 May 2010 , doi: 10.1016/j.cell.2010.03.054 (1) RIKEN Advanced Science Institute, Computational Systems Biology Research Group, Advanced Computational Sciences Department, 1-7-22 Tsurumi-ku, Yokohama, Kanagawa, 230-0045, Japan (2) Systems Biology Ireland, University College Dublin, Belfield, Dublin 4, Ireland (3) University of Delaware, Department of Chemical Engineering, 150 Academy St., Newark, DE 19716, USA (4) Thomas Jefferson University, Department of Pathology, Anatomy, and Cell Biology, 1020 Locust Street, Philadelphia, PA 19107, USA (5) RIKEN Research Center for Allergy and Immunology, Laboratory for Cellular Systems Modeling, 1-7-22 Tsurumi-ku, Yokohama, 230-0045, Japan (6) Dresden University of Technology, Center for Information Services and High Performance Computing, 01062 Dresden, Germany
This model describes the activation of immediate early genes such as cFos after EGF or heregulin (HRG) stimulation of the MAPK pathway. Phosphorylated cFos is a key transcription factor triggering downstream cascades of cell fate determination. The model can explain how the switch-like response of p-cFos emerges from the spatiotemporal dynamics. The model comprises lumped reaction kinetics of the signal transduction pathway, the transcriptional and the posttranslational feedback and feedforward loops. The parameter set implemented here corresponds to that used for generating Figs. 4 B,C,D (red curves for 10nM HRG) of the below article in Cell (2010). Moreover, we found that the same model described well the dynamics in different cell types (MCF-7 and PC-12), of different ligands (EGF and HRG) and at different doses (0.1nM, 1nM, 10nM) for a unique set of parameter values (as implemented here and reported in Table SD4_1 of the article) except for four parameters characterising the input, cytoplasmic ppERK. These four parameters K1, K2, tau1 and tau2 are used in the two equations involving species x1 and x2. These two equations define a phenomenological input module to describe the ligand-, dose- and cell type-dependent dynamics of ppERKc which are not modelled in mechanistic detail here. The four parameter values can be adjusted to model a specific ligand, dose and cell type. 8 parameter sets for different experiments are given in Table SD4_2 of the article. This SBML file, however, carries just one such parameter set. We have chosen that of MCF-7 cells stimulated by 10nM of HRG. To reproduce all simulations from the article, please replace the parameter values for K1, K2, tau1, tau2 as needed.
Ligand-specific c-Fos expression emerges from the spatiotemporal control of ErbB network dynamics. Takashi Nakakuki(1), Marc R. Birtwistle(2,3,4), Yuko Saeki(1,5), Noriko Yumoto(1,5), Kaori Ide(1), Takeshi Nagashima(1,5), Lutz Brusch(6), Babatunde A. Ogunnaike(3), Mariko Hatakeyama(1,5), and Boris N. Kholodenko(2,4); Cell In Press, online 20 May 2010, doi:10.1016/j.cell.2010.03.054 (1) RIKEN Advanced Science Institute, Computational Systems Biology Research Group, Advanced Computational Sciences Department, 1-7-22 Tsurumi-ku, Yokohama, Kanagawa, 230-0045, Japan (2) Systems Biology Ireland, University College Dublin, Belfield, Dublin 4, Ireland (3) University of Delaware, Department of Chemical Engineering, 150 Academy St., Newark, DE 19716, USA (4) Thomas Jefferson University, Department of Pathology, Anatomy, and Cell Biology, 1020 Locust Street, Philadelphia, PA 19107, USA (5) RIKEN Research Center for Allergy and Immunology, Laboratory for Cellular Systems Modeling, 1-7-22 Tsurumi-ku, Yokohama, 230-0045, Japan (6) Dresden University of Technology, Center for Information Services and High Performance Computing, 01062 Dresden, Germany
This a model from the article: Stress-specific response of the p53-Mdm2 feedback loop Alexander Hunziker, Mogens H Jensen and Sandeep Krishna BMC Systems Biology 2010, Jul 12;4(1):94 20624280, Abstract: ABSTRACT: BACKGROUND: The p53 signalling pathway has hundreds of inputs and outputs. It can trigger cellular senescence, cell-cycle arrest and apoptosis in response to diverse stress conditions, including DNA damage, hypoxia and nutrient deprivation. Signals from all these inputs are channeled through a single node, the transcription factor p53. Yet, the pathway is flexible enough to produce different downstream gene expression patterns in response to different stresses. RESULTS: We construct a mathematical model of the negative feedback loop involving p53 and its inhibitor, Mdm2, at the core of this pathway, and use it to examine the effect of different stresses that trigger p53. In response to DNA damage, hypoxia, etc., the model exhibits a wide variety of specific output behaviour -- steady states with low or high levels of p53 and Mdm2, as well as spiky oscillations with low or high average p53 levels. CONCLUSIONS: We show that even a simple negative feedback loop is capable of exhibiting the kind of flexible stress-specific response observed in the p53 system. Further, our model provides a framework for predicting the differences in p53 response to different stresses and single nucleotide polymorphisms.
The parameters of the model corresponds to the resting state, with delta = 11hr-1, gamma = 0.2hr-1, kt = 0.03nM-1hr-1 and kf = 5000nM-1hr-1.
To simulate different stress conditions as in figure 2A (also look at the curation figure of this model) of the reference publication, the above parameter should be changed. The parameter values corresponding to different stress conditions are shown in the following table.
This is the model described in the article: The danger of metabolic pathways with turbo design Teusink B, Walsh MC, van Dam K, Westerhoff HV Trends Biochem. Sci. 1998 May; Volume: 23 (Issue: 5 ): 162-9 9612078 , Abstract: Many catabolic pathways begin with an ATP-requiring activation step, after which further metabolism yields a surplus of ATP. Such a 'turbo' principle is useful but also contains an inherent risk. This is illustrated by a detailed kinetic analysis of a paradoxical Saccharomyces cerevisiae mutant; the mutant fails to grow on glucose because of overactive initial enzymes of glycolysis, but is defective only in an enzyme (trehalose 6-phosphate synthase) that appears to have little relevance to glycolysis. The ubiquity of pathways that possess an initial activation step, suggests that there might be many more genes that, when deleted, cause rather paradoxical regulation phenotypes (i.e. growth defects caused by enhanced utilization of growth substrate).
The model represents the wild-type cell: 'guarded' glycolysis, which is the inhibition of the HK module by hexose monophosphate. The model reproduces figures 3c and 3d of the reference publication.
To reproduce unguarded glycolysis, set parameter wild_type to '0'.
This a model from the article: How yeast cells synchronize their glycolytic oscillations: a perturbation analytic treatment Bier M, Bakker BM, Westerhoff HV. Biophys. J2000 Mar;78(3):1087-93. 10692299, Abstract: Of all the lifeforms that obtain their energy from glycolysis, yeast cells are among the most basic. Under certain conditions the concentrations of the glycolytic intermediates in yeast cells can oscillate. Individual yeast cells in a suspension can synchronize their oscillations to get in phase with each other. Although the glycolytic oscillations originate in the upper part of the glycolytic chain, the signaling agent in this synchronization appears to be acetaldehyde, a membrane-permeating metabolite at the bottom of the anaerobic part of the glycolytic chain. Here we address the issue of how a metabolite remote from the pacemaking origin of the oscillation may nevertheless control the synchronization. We present a quantitative model for glycolytic oscillations and their synchronization in terms of chemical kinetics. We show that, in essence, the common acetaldehyde concentration can be modeled as a small perturbation on the \"pacemaker\" whose effect on the period of the oscillations of cells in the same suspension is indeed such that a synchronization develops.
This is A431 IERMv1.0 model described in the article Input-output behavior of ErbB signaling pathways as revealed by a mass action model trained against dynamic data. William W Chen, Birgit Schoeberl, Paul J Jasper, Mario Niepel, Ulrik B Nielsen, Douglas A Lauffenburger and Peter K Sorger. Molecular Systems Biology 2009; 5:239. PMID: 19156131 , DOI: 10.1038/msb.2008.74
Abstract: The ErbB signaling pathways, which regulate diverse physiological responses such as cell survival, proliferation and motility, have been subjected to extensive molecular analysis. Nonetheless, it remains poorly understood how different ligands induce different responses and how this is affected by oncogenic mutations. To quantify signal flow through ErbB-activated pathways we have constructed, trained and analyzed a mass action model of immediate-early signaling involving ErbB1-4 receptors (EGFR, HER2/Neu2, ErbB3 and ErbB4), and the MAPK and PI3K/Akt cascades. We find that parameter sensitivity is strongly dependent on the feature (e.g. ERK or Akt activation) or condition (e.g. EGF or heregulin stimulation) under examination and that this context dependence is informative with respect to mechanisms of signal propagation. Modeling predicts log-linear amplification so that significant ERK and Akt activation is observed at ligand concentrations far below the K(d) for receptor binding. However, MAPK and Akt modules isolated from the ErbB model continue to exhibit switch-like responses. Thus, key system-wide features of ErbB signaling arise from nonlinear interaction among signaling elements, the properties of which appear quite different in context and in isolation.
The sbml model is available as supplemental material to the article and at http://www.cdpcenter.org/resources/models/chen-et-al-2008/ . It was slightly changed to make it valid SBML and to incorporate the step functions, described in the readme file and needed for inhibitor preincubation. the equilibration processes end at 1800 sec, so to reproduce the dynamics shown in the publication and supplemental material, only the time points after 1800 need to be considered. The parameter set is the hand fitted one used for Sfigure 3 in the supplemental materials. All species are in molecules, apart from HRG, EGF and Inh, which are in M.
The results shown in SFigure 3 can be calculated dividing the parameters ERK_PP , AKT_PP and ERB_B1_P_tot by ERK_t , AKT_t and EGFR_t , respectively. Somehow we did not find the right scaleing factor for the phosphorylated ErbB1 receptor. Therefore the model does only qualitatively reproduces the timecourses shown in the first row of Sfigure 3.
This is the standard model described in the article: Systems analysis of effector caspase activation and its control by X-linked inhibitor of apoptosis protein. Rehm M, Huber HJ, Dussmann H, Prehn JH. EMBO J. 2006 Sep 20;25(18):4338-49. Epub 2006 Aug 24. PMID:16932741, doi:10.1038/sj.emboj.7601295; Abstract: Activation of effector caspases is a final step during apoptosis. Single-cell imaging studies have demonstrated that this process may occur as a rapid, all-or-none response, triggering a complete substrate cleavage within 15 min. Based on biochemical data from HeLa cells, we have developed a computational model of apoptosome-dependent caspase activation that was sufficient to remodel the rapid kinetics of effector caspase activation observed in vivo. Sensitivity analyses predicted a critical role for caspase-3-dependent feedback signalling and the X-linked-inhibitor-of-apoptosis-protein (XIAP), but a less prominent role for the XIAP antagonist Smac. Single-cell experiments employing a caspase fluorescence resonance energy transfer substrate verified these model predictions qualitatively and quantitatively. XIAP was predicted to control this all-or-none response, with concentrations as high as 0.15 microM enabling, but concentrations >0.30 microM significantly blocking substrate cleavage. Overexpression of XIAP within these threshold concentrations produced cells showing slow effector caspase activation and submaximal substrate cleavage. Our study supports the hypothesis that high levels of XIAP control caspase activation and substrate cleavage, and may promote apoptosis resistance and sublethal caspase activation in vivo.\t
This model is slightly altered from the description in the article. Cytochrome C and SMAC release from the mitochondrion is modelled as simple first order kinetics, giving the same form as the (integrated) equations in the supplement of the article. The apoptosome formation is modelled equally - and independent of the Cytochrome C release. The speed is either limited by the Apaf1 or ProCaspase9 concentration, whichever is higher, symbolised via the parameter with the ID apolim. Also, once the substrate concentration falls below 1 percent, the event Production_Breakdown is triggered, leading to a breakdown of XIAP and procaspase3 production and turning off of the enhanced/proteosomal degradation (degradation rate for reactions 38,39,40,43,44,46,48,50,51 changes from 0.0347 to 0.0058).
Originally created by libAntimony v1.3 (using libSBML 3.4.1)
This is the self maintaining metabolism model described in the article: A Simple Self-Maintaining Metabolic System: Robustness, Autocatalysis, Bistability. Piedrafita G, Montero F, Mor\u00e1n F, C\u00e1rdenas ML, Cornish-Bowden A, PLoS Computational Biology 2010, 6(8):e1000872. doi:10.1371/journal.pcbi.1000872 Abstract: A living organism must not only organize itself from within; it must also maintain its organization in the face of changes in its environment and degradation of its components. We show here that a simple (M,R)-system consisting of three interlocking catalytic cycles, with every catalyst produced by the system itself, can both establish a non-trivial steady state and maintain this despite continuous loss of the catalysts by irreversible degradation. As long as at least one catalyst is present at a sufficient concentration in the initial state, the others can be produced and maintained. The system shows bistability, because if the amount of catalyst in the initial state is insufficient to reach the non-trivial steady state the system collapses to a trivial steady state in which all fluxes are zero. It is also robust, because if one catalyst is catastrophically lost when the system is in steady state it can recreate the same state. There are three elementary flux modes, but none of them is an enzyme-maintaining mode, the entire network being necessary to maintain the two catalysts
As this is a theoretical model and no units are given in the article, the standard units (mol, seconds and litre) are used for the parameters. k8 and k11 are set equal to k4.
Originally created by libAntimony v1.4 (using libSBML 3.4.1)
Ortega F, Garc\u00e9s JL, Mas F, Kholodenko BN, Cascante M.
FEBS J. 2006 Sep; 273(17): 3915-3926
Abstract:
Previous studies have suggested that positive feedback loops and ultrasensitivity are prerequisites for bistability in covalent modification cascades. However, it was recently shown that bistability and hysteresis can also arise solely from multisite phosphorylation. Here we analytically demonstrate that double phosphorylation of a protein (or other covalent modification) generates bistability only if: (a) the two phosphorylation (or the two dephosphorylation) reactions are catalyzed by the same enzyme; (b) the kinetics operate at least partly in the zero-order region; and (c) the ratio of the catalytic constants of the phosphorylation and dephosphorylation steps in the first modification cycle is less than this ratio in the second cycle. We also show that multisite phosphorylation enlarges the region of kinetic parameter values in which bistability appears, but does not generate multistability. In addition, we conclude that a cascade of phosphorylation/dephosphorylation cycles generates multiple steady states in the absence of feedback or feedforward loops. Our results show that bistable behavior in covalent modification cascades relies not only on the structure and regulatory pattern of feedback/feedforward loops, but also on the kinetic characteristics of their component proteins.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
This a model from the article: Systems analysis of iron metabolism: the network of iron pools and fluxes Tiago JS Lopes, Tatyana Luganskaja, Maja Vujic-Spasic, Matthias W Hentze, Martina U Muckenthaler, Klaus Schumann and Jens G Reich BMC Systems Biology2010, Aug 13;4(1):112. 20704761, Abstract: Background Every cell of the mammalian organism needs iron in numerous oxido-reductive processes as well as for transport and storage of oxygen. The versatility of ionic iron makes it a toxic entity which cancatalyze the production of radicals that damage vital membranous and macromolecular assemblies in the cell. The mammalian organism maintains therefore a complex regulatory network of iron uptake, excretion and intra-body distribution. Intracellular regulation in different cell types is intertwined with a global hormonal signaling structure. Iron deficiency as well as excess of iron are frequent and serious human disorders. They can affect every cell, but also the organism as a whole. Results Here, we present a kinematic model of the dynamic system of iron pools and fluxes. It is based on ferrokinetic data and chemical measurements in C57BL6 wild-type mice maintained on iron-deficient, iron-adequate, or iron-loaded diet. The tracer iron levels in major tissues and organs (16 compartment) were followed for 28 days. The evaluation resulted in a whole-body model of fractional clearance rates. The analysis permits calculation of absolute flux rates in the steady-state, of iron distribution into different organs, of tracer-accessible pool sizes and of residence times of iron in the different compartments in response to three states of iron-repletion induced by the dietary regime. Conclusions This mathematical model presents a comprehensive physiological picture of mice under three different diets with varying iron contents. The quantitative results reflect systemic properties of iron metabolism: dynamic closedness, hierarchy of time scales, switch-over response and dynamics of iron storage in parenchymal organs. Therefore, we could assess which parameters will change under dietary perturbations and study in quantitative terms when those changes take place.
This model corresponds to the Iron Deficient condition - Mice
This a model from the article: Systems analysis of iron metabolism: the network of iron pools and fluxes Tiago JS Lopes, Tatyana Luganskaja, Maja Vujic-Spasic, Matthias W Hentze, Martina U Muckenthaler, Klaus Schumann and Jens G Reich BMC Systems Biology2010, Aug 13;4(1):112. 20704761, Abstract: Background Every cell of the mammalian organism needs iron in numerous oxido-reductive processes as well as for transport and storage of oxygen. The versatility of ionic iron makes it a toxic entity which cancatalyze the production of radicals that damage vital membranous and macromolecular assemblies in the cell. The mammalian organism maintains therefore a complex regulatory network of iron uptake, excretion and intra-body distribution. Intracellular regulation in different cell types is intertwined with a global hormonal signaling structure. Iron deficiency as well as excess of iron are frequent and serious human disorders. They can affect every cell, but also the organism as a whole. Results Here, we present a kinematic model of the dynamic system of iron pools and fluxes. It is based on ferrokinetic data and chemical measurements in C57BL6 wild-type mice maintained on iron-deficient, iron-adequate, or iron-loaded diet. The tracer iron levels in major tissues and organs (16 compartment) were followed for 28 days. The evaluation resulted in a whole-body model of fractional clearance rates. The analysis permits calculation of absolute flux rates in the steady-state, of iron distribution into different organs, of tracer-accessible pool sizes and of residence times of iron in the different compartments in response to three states of iron-repletion induced by the dietary regime. Conclusions This mathematical model presents a comprehensive physiological picture of mice under three different diets with varying iron contents. The quantitative results reflect systemic properties of iron metabolism: dynamic closedness, hierarchy of time scales, switch-over response and dynamics of iron storage in parenchymal organs. Therefore, we could assess which parameters will change under dietary perturbations and study in quantitative terms when those changes take place.
This model corresponds to the Iron Adequate condition - Mice
This a model from the article: Systems analysis of iron metabolism: the network of iron pools and fluxes Tiago JS Lopes, Tatyana Luganskaja, Maja Vujic-Spasic, Matthias W Hentze, Martina U Muckenthaler, Klaus Schumann and Jens G Reich BMC Systems Biology2010, Aug 13;4(1):112. 20704761, Abstract: Background Every cell of the mammalian organism needs iron in numerous oxido-reductive processes as well as for transport and storage of oxygen. The versatility of ionic iron makes it a toxic entity which can catalyze the production of radicals that damage vital membranous and macromolecular assemblies in the cell. The mammalian organism maintains therefore a complex regulatory network of iron uptake, excretion and intra-body distribution. Intracellular regulation in different cell types is intertwined with a global hormonal signaling structure. Iron deficiency as well as excess of iron are frequent and serious human disorders. They can affect every cell, but also the organism as a whole. Results Here, we present a kinematic model of the dynamic system of iron pools and fluxes. It is based on ferrokinetic data and chemical measurements in C57BL6 wild-type mice maintained on iron-deficient, iron-adequate, or iron-loaded diet. The tracer iron levels in major tissues and organs (16 compartment) were followed for 28 days. The evaluation resulted in a whole-body model of fractional clearance rates. The analysis permits calculation of absolute flux rates in the steady-state, of iron distribution into different organs, of tracer-accessible pool sizes and of residence times of iron in the different compartments in response to three states of iron-repletion induced by the dietary regime. Conclusions This mathematical model presents a comprehensive physiological picture of mice under three different diets with varying iron contents. The quantitative results reflect systemic properties of iron metabolism: dynamic closedness, hierarchy of time scales, switch-over response and dynamics of iron storage in parenchymal organs. Therefore, we could assess which parameters will change under dietary perturbations and study in quantitative terms when those changes take place.
This model corresponds to the Iron Loaded condition - Mice
This is the EGF dependent Akt pathway model described in: Decoupling of receptor and downstream signals in the Akt pathway by its low-pass filter characteristics. Fujita KA, Toyoshima Y, Uda S, Ozaki Y, Kubota H, and Kuroda S. Sci Signal. 2010 Jul 27;3(132):ra56. PMID: 20664065 ; DOI: 10.1126/scisignal.2000810 Abstract: In cellular signal transduction, the information in an external stimulus is encoded in temporal patterns in the activities of signaling molecules; for example, pulses of a stimulus may produce an increasing response or may produce pulsatile responses in the signaling molecules. Here, we show how the Akt pathway, which is involved in cell growth, specifically transmits temporal information contained in upstream signals to downstream effectors. We modeled the epidermal growth factor (EGF)\u2013dependent Akt pathway in PC12 cells on the basis of experimental results. We obtained counterintuitive results indicating that the sizes of the peak amplitudes of receptor and downstream effector phosphorylation were decoupled; weak, sustained EGF receptor (EGFR) phosphorylation, rather than strong, transient phosphorylation, strongly induced phosphorylation of the ribosomal protein S6, a molecule downstream of Akt. Using frequency response analysis, we found that a three-component Akt pathway exhibited the property of a low-pass filter and that this property could explain decoupling of the peak amplitudes of receptor phosphorylation and that of downstream effectors. Furthermore, we found that lapatinib, an EGFR inhibitor used as an anticancer drug, converted strong, transient Akt phosphorylation into weak, sustained Akt phosphorylation, and, because of the low-pass filter characteristics of the Akt pathway, this led to stronger S6 phosphorylation than occurred in the absence of the inhibitor. Thus, an EGFR inhibitor can potentially act as a downstream activator of some effectors.
The different versions of input, step, pulse and ramp, can be simulated using the parameters EGF_conc_pulse , EGF_conc_step and EGF_conc_ramp . Depending on which one is set unequal to 0, either a continous pulse with value EGF_conc_pulse , a 60 second step with EGF_conc_step or a signal increasing from 0 to EGF_conc_pulse over a time periode of 3600 seconds are used as input. In case more than one parameter are set to values greater than 0 these input profiles are added to each other. The pulse time and the time over which the ramp input increases can be set by pulse_time and ramp_time .
This is the NGF dependent Akt pathway model described in: Decoupling of receptor and downstream signals in the Akt pathway by its low-pass filter characteristics. Fujita KA, Toyoshima Y, Uda S, Ozaki Y, Kubota H, and Kuroda S. Sci Signal. 2010 Jul 27;3(132):ra56. PMID: 20664065 ; DOI: 10.1126/scisignal.2000810 Abstract: In cellular signal transduction, the information in an external stimulus is encoded in temporal patterns in the activities of signaling molecules; for example, pulses of a stimulus may produce an increasing response or may produce pulsatile responses in the signaling molecules. Here, we show how the Akt pathway, which is involved in cell growth, specifically transmits temporal information contained in upstream signals to downstream effectors. We modeled the epidermal growth factor (EGF)\u2013dependent Akt pathway in PC12 cells on the basis of experimental results. We obtained counterintuitive results indicating that the sizes of the peak amplitudes of receptor and downstream effector phosphorylation were decoupled; weak, sustained EGF receptor (EGFR) phosphorylation, rather than strong, transient phosphorylation, strongly induced phosphorylation of the ribosomal protein S6, a molecule downstream of Akt. Using frequency response analysis, we found that a three-component Akt pathway exhibited the property of a low-pass filter and that this property could explain decoupling of the peak amplitudes of receptor phosphorylation and that of downstream effectors. Furthermore, we found that lapatinib, an EGFR inhibitor used as an anticancer drug, converted strong, transient Akt phosphorylation into weak, sustained Akt phosphorylation, and, because of the low-pass filter characteristics of the Akt pathway, this led to stronger S6 phosphorylation than occurred in the absence of the inhibitor. Thus, an EGFR inhibitor can potentially act as a downstream activator of some effectors.
The different versions of input, step, pulse and ramp, can be simulated using the parameters NGF_conc_pulse , NGF_conc_step and NGF_conc_ramp . Depending on which one is set unequal to 0, either a continous pulse with value NGF_conc_pulse , a 60 second step with NGF_conc_step or a signal increasing from 0 to NGF_conc_pulse over a time periode of 3600 seconds are used as input. In case more than one parameter is set to values greater than 0 these input profiles are added to each other. The pulse time and the time over which the ramp input increases can be set by pulse_time and ramp_time .
This is the Akt pathway model with an EGFR inhibitor described in: Decoupling of receptor and downstream signals in the Akt pathway by its low-pass filter characteristics. Fujita KA, Toyoshima Y, Uda S, Ozaki Y, Kubota H, and Kuroda S. Sci Signal. 2010 Jul 27;3(132):ra56. PMID: 20664065 ; DOI: 10.1126/scisignal.2000810 Abstract: In cellular signal transduction, the information in an external stimulus is encoded in temporal patterns in the activities of signaling molecules; for example, pulses of a stimulus may produce an increasing response or may produce pulsatile responses in the signaling molecules. Here, we show how the Akt pathway, which is involved in cell growth, specifically transmits temporal information contained in upstream signals to downstream effectors. We modeled the epidermal growth factor (EGF)\u2013dependent Akt pathway in PC12 cells on the basis of experimental results. We obtained counterintuitive results indicating that the sizes of the peak amplitudes of receptor and downstream effector phosphorylation were decoupled; weak, sustained EGF receptor (EGFR) phosphorylation, rather than strong, transient phosphorylation, strongly induced phosphorylation of the ribosomal protein S6, a molecule downstream of Akt. Using frequency response analysis, we found that a three-component Akt pathway exhibited the property of a low-pass filter and that this property could explain decoupling of the peak amplitudes of receptor phosphorylation and that of downstream effectors. Furthermore, we found that lapatinib, an EGFR inhibitor used as an anticancer drug, converted strong, transient Akt phosphorylation into weak, sustained Akt phosphorylation, and, because of the low-pass filter characteristics of the Akt pathway, this led to stronger S6 phosphorylation than occurred in the absence of the inhibitor. Thus, an EGFR inhibitor can potentially act as a downstream activator of some effectors.
The different versions of input, step, pulse and ramp, can be simulated using the parameters EGF_conc_pulse , EGF_conc_step and EGF_conc_ramp . Depending on which one is set unequal to 0, either a continous pulse with value EGF_conc_pulse , a 60 second step with EGF_conc_step or a signal increasing from 0 to EGF_conc_pulse over a time periode of 3600 seconds are used as input. In case more than one parameter are set to values greater than 0 these input profiles are added to each other. The pulse time and the time over which the ramp input increases can be set by pulse_time and ramp_time .
This model is from the article: Restriction point control of the mammalian cell cycle via the cyclin E/Cdk2:p27 complex. Conradie R, Bruggeman FJ, Ciliberto A, Csik\u00e1sz-Nagy A, Nov\u00e1k B, Westerhoff HV, Snoep JL FEBS J.2010 Jan; 277(2): 357-67 20015233, Abstract: Numerous top-down kinetic models have been constructed to describe the cell cycle. These models have typically been constructed, validated and analyzed using model species (molecular intermediates and proteins) and phenotypic observations, and therefore do not focus on the individual model processes (reaction steps). We have developed a method to: (a) quantify the importance of each of the reaction steps in a kinetic model for the positioning of a switch point [i.e. the restriction point (RP)]; (b) relate this control of reaction steps to their effects on molecular species, using sensitivity and co-control analysis; and thereby (c) go beyond a correlation towards a causal relationship between molecular species and effects. The method is generic and can be applied to responses of any type, but is most useful for the analysis of dynamic and emergent responses such as switch points in the cell cycle. The strength of the analysis is illustrated for an existing mammalian cell cycle model focusing on the RP [Novak B, Tyson J (2004) J Theor Biol230, 563-579]. The reactions in the model with the highest RP control were those involved in: (a) the interplay between retinoblastoma protein and E2F transcription factor; (b) those synthesizing the delayed response genes and cyclin D/Cdk4 in response to growth signals; (c) the E2F-dependent cyclin E/Cdk2 synthesis reaction; as well as (d) p27 formation reactions. Nine of the 23 intermediates were shown to have a good correlation between their concentration control and RP control. Sensitivity and co-control analysis indicated that the strongest control of the RP is mediated via the cyclin E/Cdk2:p27 complex concentration. Any perturbation of the RP could be related to a change in the concentration of this complex; apparent effects of other molecular species were indirect and always worked through cyclin E/Cdk2:p27, indicating a causal relationship between this complex and the positioning of the RP.
The rate constants presented in the paper have units [per tenth of an hour] and have been changed here to [per hour] (e.g. k16 = 0.25 not 0.025); for further confirmation of the correctness of this change, see the original model (Novak, J Theor Biol 2004 230:563).
The physiological hallmark of heat-shock response in yeast is a rapid, enormous increase in the concentration of trehalose. Normally found in growing yeast cells and other organisms only as traces, trehalose becomes a crucial protector of proteins and membranes against a variety of stresses, including heat, cold, starvation, desiccation, osmotic or oxidative stress, and exposure to toxicants. Trehalose is produced from glucose 6-phosphate and uridine diphosphate glucose in a two-step process, and recycled to glucose by trehalases. Even though the trehalose cycle consists of only a few metabolites and enzymatic steps, its regulatory structure and operation are surprisingly complex. The article begins with a review of experimental observations on the regulation of the trehalose cycle in yeast and proposes a canonical model for its analysis. The first part of this analysis demonstrates the benefits of the various regulatory features by means of controlled comparisons with models of otherwise equivalent pathways lacking these features. The second part elucidates the significance of the expression pattern of the trehalose cycle genes in response to heat shock. Interestingly, the genes contributing to trehalose formation are up-regulated to very different degrees, and even the trehalose degrading trehalases show drastically increased activity during heat-shock response. Again using the method of controlled comparisons, the model provides rationale for the observed pattern of gene expression and reveals benefits of the counterintuitive trehalase up-regulation.
Toinduce a heat shock, set the parameter heat_shock from 0 to 1. Thischanges the parameter values of X8 to X19 from 1 to the valuesgiven in table 3 of the original publication. Asthis is an S-systems model, it does not contain any reactionsencoded in SBML.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
The onset of paralysis of skeletal muscles induced by BoNT/A at the isolated rat neuromuscular junction is describing in the model. This is the 3-step model described in the paper. This model is the reduced form of the model developed my Simpson 1980; PMID:\u00a0\u00a06243359\u00a0, i.e., it omits three unknown parameters that represents the binding sites for each species of the toxin. The extension to this model,\u00a0i.e. the 4-step model described in the paper is BIOMD0000000178.
Experimental studies have demonstrated that botulinum neurotoxin serotype A (BoNT/A) causes flaccid paralysis by a multi-step mechanism. Following its binding to specific receptors at peripheral cholinergic nerve endings, BoNT/A is internalized by receptor-mediated endocytosis. Subsequently its zinc-dependent catalytic domain translocates into the neuroplasm where it cleaves a vesicle-docking protein, SNAP-25, to block neurally evoked cholinergic neurotransmission. We tested the hypothesis that mathematical models having a minimal number of reactions and reactants can simulate published data concerning the onset of paralysis of skeletal muscles induced by BoNT/A at the isolated rat neuromuscular junction (NMJ) and in other systems. Experimental data from several laboratories were simulated with two different models that were represented by sets of coupled, first-order differential equations. In this study, the 3-step sequential model developed by Simpson (J Pharmacol Exp Ther 212:16-21,1980) was used to estimate upper limits of the times during which anti-toxins and other impermeable inhibitors of BoNT/A can exert an effect. The experimentally determined binding reaction rate was verified to be consistent with published estimates for the rate constants for BoNT/A binding to and dissociating from its receptors. Because this 3-step model was not designed to reproduce temporal changes in paralysis with different toxin concentrations, a new BoNT/A species and rate (k(S)) were added at the beginning of the reaction sequence to create a 4-step scheme. This unbound initial species is transformed at a rate determined by k(S) to a free species that is capable of binding. By systematically adjusting the values of k(S), the 4-step model simulated the rapid decline in NMJ function (k(S) >or= 0.01), the less rapid onset of paralysis in mice following i.m. injections (k (S) = 0.001), and the slow onset of the therapeutic effects of BoNT/A (k(S) < 0.001) in man. This minimal modeling approach was not only verified by simulating experimental results, it helped to quantitatively define the time available for an inhibitor to have some effect (t(inhib)) and the relation between this time and the rate of paralysis onset. The 4-step model predicted that as the rate of paralysis becomes slower, the estimated upper limits of (t(inhib)) for impermeable inhibitors become longer. More generally, this modeling approach may be useful in studying the kinetics of other toxins or viruses that invade host cells by similar mechanisms, e.g., receptor-mediated endocytosis.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
This is the model described in the article: A mathematical model of glutathione metabolism. Michael C Reed, Rachel L Thomas, Jovana Pavisic, S. Jill James, Cornelia M Ulrich and H. Frederik Nijhout, Theor Biol Med Model 2008,5:8; PubmedID:18442411 ; DOI:10.1186/1742-4682-5-8; Abstract: BACKGROUND: Glutathione (GSH) plays an important role in anti-oxidant defense and detoxification reactions. It is primarily synthesized in the liver by the transsulfuration pathway and exported to provide precursors for in situ GSH synthesis by other tissues. Deficits in glutathione have been implicated in aging and a host of diseases including Alzheimer's disease, Parkinson's disease, cardiovascular disease, cancer, Down syndrome and autism. APPROACH: We explore the properties of glutathione metabolism in the liver by experimenting with a mathematical model of one-carbon metabolism, the transsulfuration pathway, and glutathione synthesis, transport, and breakdown. The model is based on known properties of the enzymes and the regulation of those enzymes by oxidative stress. We explore the half-life of glutathione, the regulation of glutathione synthesis, and its sensitivity to fluctuations in amino acid input. We use the model to simulate the metabolic profiles previously observed in Down syndrome and autism and compare the model results to clinical data. CONCLUSION: We show that the glutathione pools in hepatic cells and in the blood are quite insensitive to fluctuations in amino acid input and offer an explanation based on model predictions. In contrast, we show that hepatic glutathione pools are highly sensitive to the level of oxidative stress. The model shows that overexpression of genes on chromosome 21 and an increase in oxidative stress can explain the metabolic profile of Down syndrome. The model also correctly simulates the metabolic profile of autism when oxidative stress is substantially increased and the adenosine concentration is raised. Finally, we discuss how individual variation arises and its consequences for one-carbon and glutathione metabolism.\t
parameter
orig. article
this model
Vm_CBS
700000
420000
Vm_GNMT
245
260
K_sam_GNMT
32
63
Vr_MTD(mito)
600000
595000
V_CBS
kinetic law
rearranged
V_bmetc
913
913.4
Vm_GR
8925
892.5
This version of the model contains a feeding rhythm as used in figure 5 of the original article. Four parameters, breakfast, lunchdinner and fasting, describe the relative level of amino acids, described by the parameter aa_input or Aminoacid_input, in the blood. To remove the daily feeding rhythm, either set the parameters for meals and fasting to 1 (or for figure 3 to 0.333), or remove the assignment rule for the Aminoacid_input. For the steady state evaluations for figure 6, the mealtime parameters were set to one, which, while making Copasi complain about explicit time dependency, still gives valid results.
This version of the model differs slightly from the version described in the supplement, in which contains some typos. It was corrected using the version of JWS-online, created using the original matlab files, thankfully provided by the articles authors. Many thanks to Jacky Snoep for his help and support.
In the SBML version of the model the volumes of the mitochondrion, the cytoplasm and the cell were all set to one to obtain the same equations as described in the supplemental materials of the article. The total folate is equally split between the cytosol and the mitochondrion and divided by 3/4 for the cytosol and 1/4 for the mitochondrion, respectively. To obtain an SBML model in which the volumes of the compartments, cytosol and mito, are used, the model needs to be altered as follows:
for the initial distribution of folate the terms 3/4 and 1/4 have to be replaced by volumes of cytosol and mitochondria respectively
in the transport reactions between mitochondrion and cytosol the stoichiometry of the mitochondrial reactants has to be set from 3 to 1 and in the first part of the according rate laws the factor mito/3 should simply be replaced with mito.
the stoichiometries of src and dmg have to be changed to cell/mito for mitchondrial and cell/cytosol for cytosolic reactions involving these two species (for the relative volumes used in the article this would be 4 for mitochondrial reactions and 1.33333 for cytosolic ones).
While the concentrations stay the same after these alteration, the reaction fluxes change by a factor of cytosol and mito for cytosolic and mitchondrial reactions, respectively.
Originally created by libAntimony v1.3 (using libSBML 3.4.1)
This is the single cell model for analysis of hormonal crosstalk in Arabidopsis described in the article: Modelling and experimental analysis of hormonal crosstalk in Arabidopsis. Liu J, Mehdi S, Topping J, Tarkowski P and Lindsey K. Mol Syst Biol. 2010 Jun 8;6:373; PmID: 20531403 , DOI: 10.1038/msb.2010.26 Abstract: An important question in plant biology is how genes influence the crosstalk between hormones to regulate growth. In this study, we model POLARIS (PLS) gene function and crosstalk between auxin, ethylene and cytokinin in Arabidopsis. Experimental evidence suggests that PLS acts on or close to the ethylene receptor ETR1, and a mathematical model describing possible PLS-ethylene pathway interactions is developed, and used to make quantitative predictions about PLS-hormone interactions. Modelling correctly predicts experimental results for the effect of the pls gene mutation on endogenous cytokinin concentration. Modelling also reveals a role for PLS in auxin biosynthesis in addition to a role in auxin transport. The model reproduces available mutants, and with new experimental data provides new insights into how PLS regulates auxin concentration, by controlling the relative contribution of auxin transport and biosynthesis and by integrating auxin, ethylene and cytokinin signalling. Modelling further reveals that a bell-shaped dose-response relationship between endogenous auxin and root length is established via PLS. This combined modelling and experimental analysis provides new insights into the integration of hormonal signals in plants.
This model was originally created using Copasi and taken from the supplementary materials of the MSB article. It uses equation 5 for the auxin biosynthesis and was altered to also contain the reactions for ACC, IAA and cytokinine import. Different from the supplementary material, the parameters for the auxin synthesis, v2, are set to k2c = 0.01 uM and k2=0.2 uM_per_sec and for the WT PLS transcription k6=0.3 . To obtain the model described in the first table of the supplementary materials, set k2c=k2=0 and k6=0.9 . For the pls and PLSox mutants, k6 should be set to 0 and 0.45, respectively.
This model has been exported from PottersWheel on 2009-04-20 18:57:44.\u00a0 The PottersWheel Model Definition file can be obtained from the curation tab.
Schilling M, Maiwald T, Hengl S, Winter D, Kreutz C, Kolch W, Lehmann WD, Timmer J, Klingm\u00fcller U.
Mol. Syst. Biol. 2009; 5: 334
Abstract:
Cell fate decisions are regulated by the coordinated activation of signalling pathways such as the extracellular signal-regulated kinase (ERK) cascade, but contributions of individual kinase isoforms are mostly unknown. By combining quantitative data from erythropoietin-induced pathway activation in primary erythroid progenitor (colony-forming unit erythroid stage, CFU-E) cells with mathematical modelling, we predicted and experimentally confirmed a distributive ERK phosphorylation mechanism in CFU-E cells. Model analysis showed bow-tie-shaped signal processing and inherently transient signalling for cytokine-induced ERK signalling. Sensitivity analysis predicted that, through a feedback-mediated process, increasing one ERK isoform reduces activation of the other isoform, which was verified by protein over-expression. We calculated ERK activation for biochemically not addressable but physiologically relevant ligand concentrations showing that double-phosphorylated ERK1 attenuates proliferation beyond a certain activation level, whereas activated ERK2 enhances proliferation with saturation kinetics. Thus, we provide a quantitative link between earlier unobservable signalling dynamics and cell fate decisions.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
This is the core model described in the article: Covering a Broad Dynamic Range: Information Processing at the Erythropoietin Receptor Verena Becker, Marcel Schilling, Julie Bachmann, Ute Baumann, Andreas Raue, Thomas Maiwald, Jens Timmer and Ursula Klingm\u00fcller; Science Published Online May 20, 2010; DOI: 10.1126/science.1184913 PMID: 20488988 Abstract: Cell surface receptors convert extracellular cues into receptor activation, thereby triggering intracellular signaling networks and controlling cellular decisions. A major unresolved issue is the identification of receptor properties that critically determine processing of ligand-encoded information. We show by mathematical modeling of quantitative data and experimental validation that rapid ligand depletion and replenishment of cell surface receptor are characteristic features of the erythropoietin (Epo) receptor (EpoR). The amount of Epo-EpoR complexes and EpoR activation integrated over time corresponds linearly to ligand input, covering a broad range of ligand concentrations. This relation solely depends on EpoR turnover independent of ligand binding, suggesting an essential role of large intracellular receptor pools. These receptor properties enable the system to cope with basal and acute demand in the hematopoietic system.
This is the auxiliary model described in the article: Covering a Broad Dynamic Range: Information Processing at the Erythropoietin Receptor Verena Becker, Marcel Schilling, Julie Bachmann, Ute Baumann, Andreas Raue, Thomas Maiwald, Jens Timmer and Ursula Klingm\u00fcller; Science Published Online May 20, 2010; DOI: 10.1126/science.1184913 PMID: 20488988 Abstract: Cell surface receptors convert extracellular cues into receptor activation, thereby triggering intracellular signaling networks and controlling cellular decisions. A major unresolved issue is the identification of receptor properties that critically determine processing of ligand-encoded information. We show by mathematical modeling of quantitative data and experimental validation that rapid ligand depletion and replenishment of cell surface receptor are characteristic features of the erythropoietin (Epo) receptor (EpoR). The amount of Epo-EpoR complexes and EpoR activation integrated over time corresponds linearly to ligand input, covering a broad range of ligand concentrations. This relation solely depends on EpoR turnover independent of ligand binding, suggesting an essential role of large intracellular receptor pools. These receptor properties enable the system to cope with basal and acute demand in the hematopoietic system.
This a model from the article: Data assimilation constrains new connections and components in a complex, eukaryotic circadian clock model. Pokhilko A, Hodge SK, Stratford K, Knox K, Edwards KD, Thomson AW, Mizuno T, Millar AJ. Mol Syst Biol.2010 Sep 21;6:416. 20865009, Abstract: Circadian clocks generate 24-h rhythms that are entrained by the day/night cycle. Clock circuits include several light inputs and interlocked feedback loops, with complex dynamics. Multiple biological components can contribute to each part of the circuit in higher organisms. Mechanistic models with morning, evening and central feedback loops have provided a heuristic framework for the clock in plants, but were based on transcriptional control. Here, we model observed, post-transcriptional and post-translational regulation and constrain many parameter values based on experimental data. The model's feedback circuit is revised and now includes PSEUDO-RESPONSE REGULATOR 7 (PRR7) and ZEITLUPE. The revised model matches data in varying environments and mutants, and gains robustness to parameter variation. Our results suggest that the activation of important morning-expressed genes follows their release from a night inhibitor (NI). Experiments inspired by the new model support the predicted NI function and show that the PRR5 gene contributes to the NI. The multiple PRR genes of Arabidopsis uncouple events in the late night from light-driven responses in the day, increasing the flexibility of rhythmic regulation.
This a model from the article: Modeling of bone formation and resorption mediated by parathyroid hormone: response to estrogen/PTH therapy. \tRattanakul C, Lenbury Y, Krishnamara N, Wollkind DJ. Biosystems 2003:70(1):55-72. 12753937, Abstract: Bone, a major reservoir of body calcium, is under the hormonal control of the parathyroid hormone (PTH). Several aspects of its growth, turnover, and mechanism, occur in the absence of gonadal hormones. Sex steroids such as estrogen, nonetheless, play an important role in bone physiology, and are extremely essential to maintain bone balance in adults. In order to provide a basis for understanding the underlying mechanisms of bone remodeling as it is mediated by PTH, we propose here a mathematical model of the process. The nonlinear system model is then utilized to study the temporal effect of PTH as well as the action of estrogen replacement therapy on bone turnover. Analysis of the model is done on the assumption, supported by reported clinical evidence, that the process is characterized by highly diversified dynamics, which warrants the use of singular perturbation arguments. The model is shown to exhibit limit cycle behavior, which can develop into chaotic dynamics for certain ranges of the system's parametric values. Effects of estrogen and PTH administrations are then investigated by extending on the core model. Analysis of the model seems to indicate that the paradoxical observation that intermittent PTH administration causes net bone deposition while continuous administration causes net bone loss, and certain other reported phenomena may be attributed to the highly diversified dynamics which characterizes this nonlinear remodeling process.
This is the simple model without diffusion described in th epublication Sharp developmental thresholds defined through bistability by antagonistic gradients of retinoic acid and FGF signaling. Goldbeter A, Gonze D, Pourqui\u00e9 O. Dev Dyn. 2007 Jun;236(6):1495-508. PMID: 17497689, doi:10.1016/j.jtbi.2008.01.006 Abstract: The establishment of thresholds along morphogen gradients in the embryo is poorly understood. Using mathematical modeling, we show that mutually inhibitory gradients can generate and position sharp morphogen thresholds in the embryonic space. Taking vertebrate segmentation as a paradigm, we demonstrate that the antagonistic gradients of retinoic acid (RA) and Fibroblast Growth Factor (FGF) along the presomitic mesoderm (PSM) may lead to the coexistence of two stable steady states. Here, we propose that this bistability is associated with abrupt switches in the levels of FGF and RA signaling, which permit the synchronized activation of segmentation genes, such as mesp2, in successive cohorts of PSM cells in response to the segmentation clock, thereby defining the future segments. Bistability resulting from mutual inhibition of RA and FGF provides a molecular mechanism for the all-or-none transitions assumed in the \"clock and wavefront\" somitogenesis model. Given that mutually antagonistic signaling gradients are common in development, such bistable switches could represent an important principle underlying embryonic patterning.
Originally created by libAntimony v1.4 (using libSBML 3.4.1)
This a model from the article: A mathematical model of parathyroid hormone response to acute changes in plasma ionized calcium concentration in humans. Shrestha RP, Hollot CV, Chipkin SR, Schmitt CP, Chait Y. Math Biosci.2010 Jul;226(1):46-57. 20406649, Abstract: A complex bio-mechanism, commonly referred to as calcium homeostasis, regulates plasma ionized calcium (Ca(2+)) concentration in the human body within a narrow range which is crucial for maintaining normal physiology and metabolism. Taking a step towards creating a complete mathematical model of calcium homeostasis, we focus on the short-term dynamics of calcium homeostasis and consider the response of the parathyroid glands to acute changes in plasma Ca(2+) concentration. We review available models, discuss their limitations, then present a two-pool, linear, time-varying model to describe the dynamics of this calcium homeostasis subsystem, the Ca-PTH axis. We propose that plasma PTH concentration and plasma Ca(2+) concentration bear an asymmetric reverse sigmoid relation. The parameters of our model are successfully estimated based on clinical data corresponding to three healthy subjects that have undergone induced hypocalcemic clamp tests. In the first validation of this kind, with parameters estimated separately for each subject we test the model's ability to predict the same subject's induced hypercalcemic clamp test responses. Our results demonstrate that a two-pool, linear, time-varying model with an asymmetric reverse sigmoid relation characterizes the short-term dynamics of the Ca-PTH axis.
The model corresponds to hypocalcemic clamp test explained in the paper and parameter values used in the model are that of \"subject 1\". In order to obtain the plots corresponding to \"subject 2\" and \"subject 3\" the following parameters to be changed: lambda_1, lambda_2, m1, m2, R, beta, x1_n, x2_n, x2_min, x2_max, Ca0, Ca1, t0 and alpha.
This a model from the article: A mathematical model of parathyroid hormone response to acute changes in plasma ionized calcium concentration in humans. Shrestha RP, Hollot CV, Chipkin SR, Schmitt CP, Chait Y. Math Biosci.2010 Jul;226(1):46-57. 20406649, Abstract: A complex bio-mechanism, commonly referred to as calcium homeostasis, regulates plasma ionized calcium (Ca(2+)) concentration in the human body within a narrow range which is crucial for maintaining normal physiology and metabolism. Taking a step towards creating a complete mathematical model of calcium homeostasis, we focus on the short-term dynamics of calcium homeostasis and consider the response of the parathyroid glands to acute changes in plasma Ca(2+) concentration. We review available models, discuss their limitations, then present a two-pool, linear, time-varying model to describe the dynamics of this calcium homeostasis subsystem, the Ca-PTH axis. We propose that plasma PTH concentration and plasma Ca(2+) concentration bear an asymmetric reverse sigmoid relation. The parameters of our model are successfully estimated based on clinical data corresponding to three healthy subjects that have undergone induced hypocalcemic clamp tests. In the first validation of this kind, with parameters estimated separately for each subject we test the model's ability to predict the same subject's induced hypercalcemic clamp test responses. Our results demonstrate that a two-pool, linear, time-varying model with an asymmetric reverse sigmoid relation characterizes the short-term dynamics of the Ca-PTH axis.
The model corresponds to hypercalcemic clamp test explained in the paper and parameter values used in the model are that of \"subject 1\". In order to obtain the plots corresponding to \"subject 2\" and \"subject 3\" the following parameters to be changed: lambda_1, lambda_2, m1, m2, R, beta, x1_n, x2_n, x2_min, x2_max, t0, Ca0, Ca1 and alpha.
This a model from the article: Modeling the interactions between osteoblast and osteoclast activities in bone remodeling. Lemaire V, Tobin FL, Greller LD, Cho CR, Suva LJ. J Theor Biol.2004 Aug 7;229(3):293-309. 15234198, Abstract: We propose a mathematical model explaining the interactions between osteoblasts and osteoclasts, two cell types specialized in the maintenance of the bone integrity. Bone is a dynamic, living tissue whose structure and shape continuously evolves during life. It has the ability to change architecture by removal of old bone and replacement with newly formed bone in a localized process called remodeling. The model described here is based on the idea that the relative proportions of immature and mature osteoblasts control the degree of osteoclastic activity. In addition, osteoclasts control osteoblasts differentially depending on their stage of differentiation. Despite the tremendous complexity of the bone regulatory system and its fragmentary understanding, we obtain surprisingly good correlations between the model simulations and the experimental observations extracted from the literature. The model results corroborate all behaviors of the bone remodeling system that we have simulated, including the tight coupling between osteoblasts and osteoclasts, the catabolic effect induced by continuous administration of PTH, the catabolic action of RANKL, as well as its reversal by soluble antagonist OPG. The model is also able to simulate metabolic bone diseases such as estrogen deficiency, vitamin D deficiency, senescence and glucocorticoid excess. Conversely, possible routes for therapeutic interventions are tested and evaluated. Our model confirms that anti-resorptive therapies are unable to partially restore bone loss, whereas bone formation therapies yield better results. The model enables us to determine and evaluate potential therapies based on their efficacy. In particular, the model predicts that combinations of anti-resorptive and anabolic therapies provide significant benefits compared with monotherapy, especially for certain type of skeletal disease. Finally, the model clearly indicates that increasing the size of the pool of preosteoblasts is an essential ingredient for the therapeutic manipulation of bone formation. This model was conceived as the first step in a bone turnover modeling platform. These initial modeling results are extremely encouraging and lead us to proceed with additional explorations into bone turnover and skeletal remodeling.
This model corresponds to the core model published in the paper. There is no corresponding plot to reproduce for this model.To obtain each of the 9 plots in the Figure 2 of the reference publication, there are some changes to be made to the core model.The curation figure reproduces figure 2 of the reference publication. There is a corresponding SBML and Copasi files for each of the plot. See curation tab for more details.
This a model from the article: Mathematical model of paracrine interactions between osteoclasts and osteoblasts predicts anabolic action of parathyroid hormone on bone. Komarova SV. Endocrinology.2005 Aug;146(8):3589-95. 15860557, Abstract: To restore falling plasma calcium levels, PTH promotes calcium liberation from bone. PTH targets bone-forming cells, osteoblasts, to increase expression of the cytokine receptor activator of nuclear factor kappaB ligand (RANKL), which then stimulates osteoclastic bone resorption. Intriguingly, whereas continuous administration of PTH decreases bone mass, intermittent PTH has an anabolic effect on bone, which was proposed to arise from direct effects of PTH on osteoblastic bone formation. However, antiresorptive therapies impair the ability of PTH to increase bone mass, indicating a complex role for osteoclasts in the process. We developed a mathematical model that describes the actions of PTH at a single site of bone remodeling, where osteoclasts and osteoblasts are regulated by local autocrine and paracrine factors. It was assumed that PTH acts only to increase the production of RANKL by osteoblasts. As a result, PTH stimulated osteoclasts upon application, followed by compensatory osteoblast activation due to the coupling of osteoblasts to osteoclasts through local paracrine factors. Continuous PTH administration resulted in net bone loss, because bone resorption preceded bone formation at all times. In contrast, over a wide range of model parameters, short application of PTH resulted in a net increase in bone mass, because osteoclasts were rapidly removed upon PTH withdrawal, enabling osteoblasts to rebuild the bone. In excellent agreement with experimental findings, increase in the rate of osteoclast death abolished the anabolic effect of PTH on bone. This study presents an original concept for the regulation of bone remodeling by PTH, currently the only approved anabolic treatment for osteoporosis.
The model reproduces Figures 1B and 2A of the reference publication. To obtain the figures 1B, the parameter g21 needs changes. To obtain the figures 1A, the parameters g21, g12 and k2 need to changed. For details look at the curation tab.
The initial concentration of Osteoclasts (x1) is corrected to 1.06066 from 10.06066.
This model was taken from the CellML repository and automatically converted to SBML. The original model was: CellMLdetails The original CellML model was created by: Lloyd, Catherine, May c.lloyd@auckland.ac.nz The University of Auckland The Bioengineering Institute
This is the reduced model of the voltage oscillations in barnacle muscle fibers, generally known as the Morris-Lecar model (eg. wikipedia), described in the article: Voltage oscillations in the barnacle giant muscle fiber. \tMorris C, Lecar H. Biophys J. 1981 Jul;35(1):193-213. PubmedID:7260316; DOI:10.1016/S0006-3495(81)84782-0 \tAbstract: \tBarnacle muscle fibers subjected to constant current stimulation produce a variety of types of oscillatory behavior when the internal medium contains the Ca++ chelator EGTA. Oscillations are abolished if Ca++ is removed from the external medium, or if the K+ conductance is blocked. Available voltage-clamp data indicate that the cell's active conductance systems are exceptionally simple. Given the complexity of barnacle fiber voltage behavior, this seems paradoxical. This paper presents an analysis of the possible modes of behavior available to a system of two noninactivating conductance mechanisms, and indicates a good correspondence to the types of behavior exhibited by barnacle fiber. The differential equations of a simple equivalent circuit for the fiber are dealt with by means of some of the mathematical techniques of nonlinear mechanics. General features of the system are (a) a propensity to produce damped or sustained oscillations over a rather broad parameter range, and (b) considerable latitude in the shape of the oscillatory potentials. It is concluded that for cells subject to changeable parameters (either from cell to cell or with time during cellular activity), a system dominated by two noninactivating conductances can exhibit varied oscillatory and bistable behavior.
The model consists of the differential equations (9) and (2) given on pages 205 and 196 of the article. There seems to be a typo in the figure caption of figure 9. Using V2 = 15 instead of -15 allows to reproduce the results.
Originally created by libAntimony v1.4 (using libSBML 3.4.1)
This model is described inthe article: Metabolic control mechanisms. 5. A solution for the equations representing interaction between glycolysis and respiration in ascites tumor cells. Britton Chance, David Garfinkel, Joseph Higgins and Benno Hess, J Biol Chem. 1960 35:2426-2439. PubmedID: 13692276 Abstract: The other papers of this series present experimentalevidence for possible relationships between the kinetics of oxygen,glucose, adenosine diphosphate, adenosine triphosphate, andphosphate and those of the cytochromes and pyridine nucleotidesof the ascites tumor cell. From these general experiments weare able to formulate, under the law of mass action, a minimumhypothesis under which the four metabolic regulations previouslydescribed can be observed. In brief, the system can be represented by the known enzyme systems, a relatively higher ADP affinity in respiration than in glycolysis, the mitochondrial membrane, a segregation of ATP into two compartments, and an ATP-utilizing system that is responsive to small decreases of the intracellular ADP level. The chemical equations for the pathway from glucose to oxygen are solved by a digital computer method so that the responses of the chemical equations and of the living cell can be accurately compared. For reasons already described, we greatly prefer a com-puter representation based upon a physical or chemical lawrepresenting the action of the system to a model simulating theoperation of the chemical system but not based upon funda-mental laws for the reactions involved; such a representationwould not adequately represent the kinetics of the system, as inan electric circuit network or in some types of hydraulic ana-logues.
The model gives solutions of the reaction kinetics for three types of metabolism:
0 - 64s, metabolism of endogenous substrate
64s - 119s, metabolism of added glucose, illustrating the activated and inhibited aspects of glucose metabolism
119s - 153s, relief of glucose and oxygen inhibition by the addition of an uncoupling agent
This model is described in the article: The mechanism of catalase action. II. Electric analog computer studies. Britton Chance, David S Greenstein, Joseph Higgins, CC Yang, Arch Biochem. 1952 37:322-39. PubmedID:14953444 Summary: An electric analog computer has been constructed for a study of the kinetics of catalase action. This computer gives results for the formation and disappearance of the catalase-hydrogen peroxide complex that are in good agreement with the experimental data. The computer study verifies an approximate method for the computation of the velocity constant for the combination of hydrogen peroxide and catalase and justifies the simple formula used previously to compute the velocity constant for the reaction of the catalase-hydrogen peroxide complex with donor molecules. Finally, the computer data show that the binding of peroxide to catalase is a practically irreversible reaction.
The reaction of the enzyme-substrate complex, p, with the electron donor, a, is bimolecular, although in the article, as a is assumed to be constant, it is modelled using an apparent rate constant consisting of the product of the rate constant, k4, and the concentration of a. In this implementation, the concentration of a is set to 1 and the value of k4 just adapted so that the product equals the values given for k4*a in the article. The specific parameter values are taken from Fig 3. The graphs do not exactly match those in the paper, this may be due to the different simulators used.
Default parameter values are those in the right hand panel of Fig 12. The other panels may be obtained by setting X to 1, 2 or 4, and K3 to 0, 1/2 or 1.
This model is described in: The kinetics of the enzyme-substrate compound of peroxidase. Britton Chance, Journal of Biological Chemistry, 151, 553-577, 1943. PDF at JBC reprinted in: Adv Enzymol Relat Areas Mol Biol. 1999;73:3-23. PubmedID:10218104> Abstract: Under the narrow range of experimental conditions, and at a temperature of approximately 25 degrees, the following data were obtained. 1. The equilibrium constant of peroxidase and hydrogen peroxide has a minimum value of 2 x 10(-8). 2. The velocity constant for the formation of peroxidase-H2O2 Complex I is 1.2 x 10(7) liter mole-1 sec.-1, +/- 0.4 x 10(7). 3. The velocity constant for the reversible breakdown of peroxidase-H2O2 Complex I is a negligible factor in the enzyme-substrate kinetics and is calculated to be less than 0.2 sec.-1. 4. The velocity constant, k3, for the enzymatic breakdown of peroxidase-H2O2 Complex I varies from nearly zero to higher than 5 sec.-1, depending upon the acceptor and its concentration. The quotient of k3 and the leucomalachite green concentration is 3.0 x 10(4) liter mole-1 sec.-1. For ascorbic acid this has a value of 1.8 x 10(5) liter mole-1 sec.-1. 5. For a particular acceptor concentration, k3 is determined solely from the enzyme-substrate kinetics and is found to be 4.2 sec.-1. 6. For the same conditions, k3 is determined from a simple relationship derived from mathematical solutions of the Michaelis theory and is found to be 5.2 sec.-1. 7. For the same conditions, k3 is determined from the over-all enzyme action and is found to be 5.1 sec.-1. 8. The Michaelis constant determined from kinetic data alone is found to be 0.44 x 10(-6). 9. The Michaelis constant determined from steady state measurements is found to be 0.41 x 10(-6). 10. The Michaelis constant determined from measurement of the overall enzyme reaction is found to be 0.50 x 10(-6). 11. The kinetics of the enzyme-substrate compound closely agree with mathematical solutions of an extension of the Michaelis theory obtained for experimental values of concentrations and reaction velocity constants. 12. The adequacy of the criteria by which experiment and theory were correlated has been examined critically and the mathematical solutions have been found to be sensitive to variations in the experimental conditions. 13. The critical features of the enzyme-substrate kinetics are Pmax, and curve shape, rather than t1/2. t1/2 serves as a simple measure of dx/dt. 14. A second order combination of enzyme and substrate to form the enzyme-substrate compound, followed by a first order breakdown of the compound, describes the activity of peroxidase for a particular acceptor concentration. 15. The kinetic data indicate a bimolecular combination of acceptor and enzyme-substrate compound.
This model is the one described in the appendix of the article. It reproduces, amongst others, figure 12. The parameters and concentrations used are rescaled as stated in the article. K2 and K3 stand for k2 and k3, respectively, divided by k1.
This model is the reaction sequence SEQFB, a model pathway of a branched system with sequential feedback interactions found in bacterial amino acid synthesis. Its steady state is presented in Fig 4.
The model is described in: METAMOD: software for steady-state modelling and control analysis of metabolic pathways on the BBC microcomputer. JHS Hofmeyr and KJ van der Merwe, Comput Appl Biosci 1986 2:243-9; PubmedID: 3450367 Abstract: METAMOD, a BBC microcomputer-based software package for steady-state modelling and control analysis of model metabolic pathways, is described, The package consists of two programs. METADEF allows the user to define the pathway in terms of reactions, rate equations and initial concentrations of metabolites. METACAL uses one of two algorithms to calculate the steady-state concentrations and fluxes. One algorithm uses the current ratio of production and consumption rates of variable metabolites to adjust iteratively their concentrations in such a way that they converge towards the steady state. The other algorithm solves the roots of the system equations by means of a quasi-Newtonian procedure. Control analysis allows the calculation of elasticity, control and response coefficients, by means of finite difference approximation. METAMOD is interactive and easy to use, and suitable for teaching and research purposes.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
In summary, you are entitled to use this encoded model in absolutely any manner you deem suitable, verbatim, or with modification, alone or embedded it in a larger context, redistribute it, commercially or not, in a restricted way or not.
This a model from the article: Experimental and computational analysis of polyglutamine-mediated cytotoxicity. Tang MY, Proctor CJ, Woulfe J, Gray DA. PLoS Comput Biol.2010 Sep 23;6(9). 20885783, Abstract: Expanded polyglutamine (polyQ) proteins are known to be the causative agents of a number of human neurodegenerative diseases but the molecular basis of their cytoxicity is still poorly understood. PolyQ tracts may impede the activity of the proteasome, and evidence from single cell imaging suggests that the sequestration of polyQ into inclusion bodies can reduce the proteasomal burden and promote cell survival, at least in the short term. The presence of misfolded protein also leads to activation of stress kinases such as p38MAPK, which can be cytotoxic. The relationships of these systems are not well understood. We have used fluorescent reporter systems imaged in living cells, and stochastic computer modeling to explore the relationships of polyQ, p38MAPK activation, generation of reactive oxygen species (ROS), proteasome inhibition, and inclusion body formation. In cells expressing a polyQ protein inclusion, body formation was preceded by proteasome inhibition but cytotoxicity was greatly reduced by administration of a p38MAPK inhibitor. Computer simulations suggested that without the generation of ROS, the proteasome inhibition and activation of p38MAPK would have significantly reduced toxicity. Our data suggest a vicious cycle of stress kinase activation and proteasome inhibition that is ultimately lethal to cells. There was close agreement between experimental data and the predictions of a stochastic computer model, supporting a central role for proteasome inhibition and p38MAPK activation in inclusion body formation and ROS-mediated cell death.
This is the model described the article: GSK3 and p53 - is there a link in Alzheimer's disease? Carole J Proctor and Douglas A Gray Molecular Neurodegeneration 2010, 5:7; doi: 10.1186/1750-1326-5-7 Abstract: Background: Recent evidence suggests that glycogen synthase kinase-3beta (GSK3beta) is implicated in both sporadic and familial forms of Alzheimer's disease. The transcription factor, p53 also plays a role and has been linked to an increase in tau hyperphosphorylation although the effect is indirect. There is also evidence that GSK3beta and p53 interact and that the activity of both proteins is increased as a result of this interaction. Under normal cellular conditions, p53 is kept at low levels by Mdm2 but when cells are stressed, p53 is stabilised and may then interact with GSK3beta. We propose that this interaction has an important contribution to cellular outcomes and to test this hypothesis we developed a stochastic simulation model. Results: The model predicts that high levels of DNA damage leads to increased activity of p53 and GSK3beta and low levels of aggregation but if DNA damage is repaired, the aggregates are eventually cleared. The model also shows that over long periods of time, aggregates may start to form due to stochastic events leading to increased levels of ROS and damaged DNA. This is followed by increased activity of p53 and GSK3beta and a vicious cycle ensues. Conclusions: Since p53 and GSK3beta are both involved in the apoptotic pathway, and GSK3beta overactivity leads to increased levels of plaques and tangles, our model might explain the link between protein aggregation and neuronal loss in neurodegeneration.
Notes: The original model submitted by the author had events in it. Since, this model is intended for Stochastic Simulation run and Copasi cannot handle events in Stochastic run, I have replaced the events with piecewise assignment rule. -Viji
This model is an extension of Proctor_p53_Mdm2_ATM ( BIOMD0000000188 ).
\t This is the model described in: Feedback between p21 and reactive oxygen production is necessary for cell senescence. \tPassos JF, Nelson G, Wang C, Richter T, Simillion C, Proctor CJ, Miwa S, Olijslagers S, Hallinan J, Wipat A, Saretzki G, Rudolph KL, Kirkwood TB, von Zglinicki T. ;Mol Sys Biol2010;6:347. Epub 2010 Feb 16. PMID:20160708 doi:10.1038/msb.2010.5; Abstract: \t Cellular senescence--the permanent arrest of cycling in normally proliferating cells such as fibroblasts--contributes both to age-related loss of mammalian tissue homeostasis and acts as a tumour suppressor mechanism. The pathways leading to establishment of senescence are proving to be more complex than was previously envisaged. Combining in-silico interactome analysis and functional target gene inhibition, stochastic modelling and live cell microscopy, we show here that there exists a dynamic feedback loop that is triggered by a DNA damage response (DDR) and, which after a delay of several days, locks the cell into an actively maintained state of 'deep' cellular senescence. The essential feature of the loop is that long-term activation of the checkpoint gene CDKN1A (p21) induces mitochondrial dysfunction and production of reactive oxygen species (ROS) through serial signalling through GADD45-MAPK14(p38MAPK)-GRB2-TGFBR2-TGFbeta. These ROS in turn replenish short-lived DNA damage foci and maintain an ongoing DDR. We show that this loop is both necessary and sufficient for the stability of growth arrest during the establishment of the senescent phenotype. \t
This model is from the article: PI3K-dependent cross-talk interactions converge with Ras as quantifiable inputs integrated by Erk. Wang CC, Cirit M, Haugh JM Mol. Syst. Biol. 2009;5:246. 19225459 , Abstract: Although it is appreciated that canonical signal-transduction pathways represent dominant modes of regulation embedded in larger interaction networks, relatively little has been done to quantify pathway cross-talk in such networks. Through quantitative measurements that systematically canvas an array of stimulation and molecular perturbation conditions, together with computational modeling and analysis, we have elucidated cross-talk mechanisms in the platelet-derived growth factor (PDGF) receptor signaling network, in which phosphoinositide 3-kinase (PI3K) and Ras/extracellular signal-regulated kinase (Erk) pathways are prominently activated. We show that, while PI3K signaling is insulated from cross-talk, PI3K enhances Erk activation at points both upstream and downstream of Ras. The magnitudes of these effects depend strongly on the stimulation conditions, subject to saturation effects in the respective pathways and negative feedback loops. Motivated by those dynamics, a kinetic model of the network was formulated and used to precisely quantify the relative contributions of PI3K-dependent and -independent modes of Ras/Erk activation.
This model is parameterized with the median of the estimated parameters given in the supplementary material of the original publication's (doi: 10.1038/msb.2009.4 ) supplement on pages 8 and 9.
This model originates from BioModels Database: A Database of Annotated Published Models (http://www.ebi.ac.uk/biomodels/). It is copyright (c) 2005-2010 The BioModels.net Team. To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
In summary, you are entitled to use this encoded model in absolutely any manner you deem suitable, verbatim, or with modification, alone or embedded it in a larger context, redistribute it, commercially or not, in a restricted way or not..
This is system 1, the model with linear antigen uptake by pAPCs, described in the article: Self-tolerance and Autoimmunity in a Regulatory T Cell Model. Alexander HK, Wahl LM. Bull Math Biol. 2010 Mar 2. PMID:20195912, doi:10.1007/s11538-010-9519-2; Abstract: The class of immunosuppressive lymphocytes known as regulatory T cells (Tregs) has been identified as a key component in preventing autoimmune diseases. Although Tregs have been incorporated previously in mathematical models of autoimmunity, we take a novel approach which emphasizes the importance of professional antigen presenting cells (pAPCs). We examine three possible mechanisms of Treg action (each in isolation) through ordinary differential equation (ODE) models. The immune response against a particular autoantigen is suppressed both by Tregs specific for that antigen and by Tregs of arbitrary specificities, through their action on either maturing or already mature pAPCs or on autoreactive effector T cells. In this deterministic approach, we find that qualitative long-term behaviour is predicted by the basic reproductive ratio R (0) for each system. When R (0) < 1, only the trivial equilibrium exists and is stable; when R (0)>1, this equilibrium loses its stability and a stable non-trivial equilibrium appears. We interpret the absence of self-damaging populations at the trivial equilibrium to imply a state of self-tolerance, and their presence at the non-trivial equilibrium to imply a state of chronic autoimmunity. Irrespective of mechanism, our model predicts that Tregs specific for the autoantigen in question play no role in the system's qualitative long-term behaviour, but have quantitative effects that could potentially reduce an autoimmune response to sub-clinical levels. Our results also suggest an important role for Tregs of arbitrary specificities in modulating the qualitative outcome. A stochastic treatment of the same model demonstrates that the probability of developing a chronic autoimmune response increases with the initial exposure to self antigen or autoreactive effector T cells. The three different mechanisms we consider, while leading to a number of similar predictions, also exhibit key differences in both transient dynamics (ODE approach) and the probability of chronic autoimmunity (stochastic approach).
Originally created by libAntimony v1.4 (using libSBML 3.4.1)
This is system 2, the model with Michelis Menten type antigen uptake by pAPCs, described in the article: Self-tolerance and Autoimmunity in a Regulatory T Cell Model. Alexander HK, Wahl LM. Bull Math Biol. 2010 Mar 2. PMID: 20195912 , doi: 10.1007/s11538-010-9519-2 ; Abstract: The class of immunosuppressive lymphocytes known as regulatory T cells (Tregs) has been identified as a key component in preventing autoimmune diseases. Although Tregs have been incorporated previously in mathematical models of autoimmunity, we take a novel approach which emphasizes the importance of professional antigen presenting cells (pAPCs). We examine three possible mechanisms of Treg action (each in isolation) through ordinary differential equation (ODE) models. The immune response against a particular autoantigen is suppressed both by Tregs specific for that antigen and by Tregs of arbitrary specificities, through their action on either maturing or already mature pAPCs or on autoreactive effector T cells. In this deterministic approach, we find that qualitative long-term behaviour is predicted by the basic reproductive ratio R (0) for each system. When R (0) < 1, only the trivial equilibrium exists and is stable; when R (0)>1, this equilibrium loses its stability and a stable non-trivial equilibrium appears. We interpret the absence of self-damaging populations at the trivial equilibrium to imply a state of self-tolerance, and their presence at the non-trivial equilibrium to imply a state of chronic autoimmunity. Irrespective of mechanism, our model predicts that Tregs specific for the autoantigen in question play no role in the system's qualitative long-term behaviour, but have quantitative effects that could potentially reduce an autoimmune response to sub-clinical levels. Our results also suggest an important role for Tregs of arbitrary specificities in modulating the qualitative outcome. A stochastic treatment of the same model demonstrates that the probability of developing a chronic autoimmune response increases with the initial exposure to self antigen or autoreactive effector T cells. The three different mechanisms we consider, while leading to a number of similar predictions, also exhibit key differences in both transient dynamics (ODE approach) and the probability of chronic autoimmunity (stochastic approach).
Originally created by libAntimony v1.4 (using libSBML 3.4.1)
This a model from the article: Mathematical model of binding of albumin-bilirubin complex to the surface of carbon pyropolymer. Nikolaev AV, Rozhilo YA, Starozhilova TK, Sarnatskaya VV, Yushko LA, Mikhailovskii SV, Kholodov AS, Lobanov AI. Bull Exp Biol Med2005 Sep;140(3):365-9. 16307060, Abstract: We proposed a mathematical model and estimated the parameters of adsorption of albumin-bilirubin complex to the surface of carbon pyropolymer. Design data corresponded to the results of experimental studies. Our findings indicate that modeling of this process should take into account fractal properties of the surface of carbon pyropolymer.
This is the model described in the article: Photosynthetic oscillations and the interdependence of photophosphorylation and electron transport as studied by a mathematical model. Rovers W, Giersch C. Biosystems. 1995;35(1):63-73. PMID: 7772723 Abstract: A simple mathematical model of photosynthetic carbon metabolism as driven by ATP and NADPH has been formulated to analyse photosynthetic oscillations. Two essential assumptions of this model are: (i) reduction of 3-phosphoglycerate to triosephosphate in the Clavin cycle is limited by ATP, not by NADPH, and (ii) photophosphorylation is affected by the availability of both ADP and NADP, while electron transport is limited by NADP only. The model produces oscillations of observed damping and period in ATP and NADP concentrations which are about 180 degrees out of phase, while three alternative proposals regarding coupling of electron transport and photophosphorylation do not produce oscillatory model solutions. The phases of ATP and NADPH are in reasonable agreement with the available experimental data. The model (which assumes that redox control of photophosphorylation is part of the oscillatory mechanism) is compared with an alternative proposal (that oscillations are due to interdependence of turnover of adenylates and Calvin cycle intermediates). From the similarity of the mathematical structures of both models it is inviting to speculate that both models are partial aspects of the oscillatory mechanism.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
In summary, you are entitled to use this encoded model in absolutely any manner you deem suitable, verbatim, or with modification, alone or embedded it in a larger context, redistribute it, commercially or not, in a restricted way or not.
This a model from the article: Modelling the Role of UCH-L1 on Protein Aggregation inAge-Related Neurodegeneration. Proctor CJ, Tangeman PJ, Ardley HC. PLoS One. 2010 Oct 6;5(10):e13175 20949132 , Abstract: Overexpression of the de-ubiquitinating enzyme UCH-L1 leads to inclusion formation in response to proteasome impairment. These inclusions contain components of the ubiquitin-proteasome system and \u03b1-synuclein confirming that the ubiquitin-proteasome system plays an important role in protein aggregation. The processes involved are very complex and so we have chosen to take a systems biology approach to examine the system whereby we combine mathematical modelling with experiments in an iterative process. The experiments show that cells are very heterogeneous with respect to inclusion formation and so we use stochastic simulation. The model shows that the variability is partly due to stochastic effects but also depends on protein expression levels of UCH-L1 within cells. The model also indicates that the aggregation process can start even before any proteasome inhibition is present, but that proteasome inhibition greatly accelerates aggregation progression. This leads to less efficient protein degradation and hence more aggregation suggesting that there is a vicious cycle. However, proteasome inhibition may not necessarily be the initiating event. Our combined modelling and experimental approach show that stochastic effects play an important role in the aggregation process and could explain the variability in the age of disease onset. Furthermore, our model provides a valuable tool, as it can be easily modified and extended to incorporate new experimental data, test hypotheses and make testable predictions.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
In summary, you are entitled to use this encoded model in absolutely any manner you deem suitable, verbatim, or with modification, alone or embedded it in a larger context, redistribute it, commercially or not, in a restricted way or not.
Vaccines exert strong selective pressures on pathogens, favouring the spread of antigenic variants. We propose a simple mathematical model to investigate the dynamics of a novel pathogenic strain that emerges in a population where a previous strain is maintained at low endemic level by a vaccine. We compare three methods to assess the ability of the novel strain to invade and persist: algebraic rate of invasion; deterministic dynamics; and stochastic dynamics. These three techniques provide complementary predictions on the fate of the system. In particular, we emphasize the importance of stochastic simulations, which account for the possibility of extinctions of either strain. More specifically, our model suggests that the probability of persistence of an invasive strain (i) can be minimized for intermediate levels of vaccine cross-protection (i.e. immune protection against the novel strain) and (ii) is lower if cross-immunity acts through a reduced infectious period rather than through reduced susceptibility.
This version of the model can be used for both the stochastic and the deterministic simulations described in the article. For deterministic interpretations with infinite population sizes, set the population size\u00a0 N\u00a0= 1. The model does reproduces the deterministic time course. The initial values are set to the steady state values for a latent infection with strain 1 with an invading infection of strain 2 (I2=1e-06), 100 percent vaccination with a susceptibility reduction \u03c4=0.7 at birth (p=1), and all other parameters as in figure 3 of the publication.\u00a0
To be compatible with older software tools, the english letter names instead of the greek symbols were used for parameter names:
parameter
symbol
name
transmission rate
\u03b2
beta
recovery rate
\u03b3
gamma
birth/death rate
\u03bc
mu
rate of loss of natural immunity
\u03c3
sigma
rate of loss of vaccine immunity
\u03c3 v
sigmaV
reduction of susceptibility by primary infection
\u03b8
theta
reduction of infection period by primary infection
\u03bd
nu
reduction of susceptibility by vaccination
\u03c4
tau
reduction of infection period by vaccination
\u03b7
eta
Originally created by libAntimony v1.4 (using libSBML 3.4.1)
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
This a model from the article: Isoform switching facilitates period control in the Neurospora crassa circadian clock. Akman OE, Locke JC, Tang S, Carr\u00e9 I, Millar AJ, Rand DA Mol. Syst. Biol. 2008;Vol 4: 164 18277380 , Abstract: A striking and defining feature of circadian clocks is the small variation in period over a physiological range of temperatures. This is referred to as temperature compensation, although recent work has suggested that the variation observed is a specific, adaptive control of period. Moreover, given that many biological rate constants have a Q(10) of around 2, it is remarkable that such clocks remain rhythmic under significant temperature changes. We introduce a new mathematical model for the Neurospora crassa circadian network incorporating experimental work showing that temperature alters the balance of translation between a short and long form of the FREQUENCY (FRQ) protein. This is used to discuss period control and functionality for the Neurospora system. The model reproduces a broad range of key experimental data on temperature dependence and rhythmicity, both in wild-type and mutant strains. We present a simple mechanism utilising the presence of the FRQ isoforms (isoform switching) by which period control could have evolved, and argue that this regulatory structure may also increase the temperature range where the clock is robustly rhythmic.
This is the reduced model described in the article: A synthetic Escherichia coli predator\u2013prey ecosystem Balagadd\u00e9 FK, Song H, Ozaki J, Collins CH, Barnet M, Arnold FH, Quake SR, You L.Mol Syst Biol. 2008;4:187. Epub 2008 Apr 15. PMID: 18414488; DOI:10.1038/msb.2008.24
Abstract: We have constructed a synthetic ecosystem consisting of two Escherichia coli populations, which communicate bi-directionally through quorum sensing and regulate each other's gene expression and survival via engineered gene circuits. Our synthetic ecosystem resembles canonical predator\u2013prey systems in terms of logic and dynamics. The predator cells kill the prey by inducing expression of a killer protein in the prey, while the prey rescue the predators by eliciting expression of an antidote protein in the predator. Extinction, coexistence and oscillatory dynamics of the predator and prey populations are possible depending on the operating conditions as experimentally validated by long-term culturing of the system in microchemostats. A simple mathematical model is developed to capture these system dynamics. Coherent interplay between experiments and mathematical analysis enables exploration of the dynamics of interacting populations in a predictable manner.
In the article the cell density is given in per 103 cells per microlitre. To evade a conversion factor in the SBML implementation, the unit for the cell densities was just left the same as for the AHLs A and A2 (nM).
This a model from the article: Mathematical model of the morphogenesis checkpoint in budding yeast. Ciliberto A, Novak B, Tyson JJ J. Cell Biol. [2003 Dec; Volume: 163 (Issue: 6 )] Page info: 1243-54 14691135 , Abstract: The morphogenesis checkpoint in budding yeast delays progression through the cell cycle in response to stimuli that prevent bud formation. Central to the checkpoint mechanism is Swe1 kinase: normally inactive, its activation halts cell cycle progression in G2. We propose a molecular network for Swe1 control, based on published observations of budding yeast and analogous control signals in fission yeast. The proposed Swe1 network is merged with a model of cyclin-dependent kinase regulation, converted into a set of differential equations and studied by numerical simulation. The simulations accurately reproduce the phenotypes of a dozen checkpoint mutants. Among other predictions, the model attributes a new role to Hsl1, a kinase known to play a role in Swe1 degradation: Hsl1 must also be indirectly responsible for potent inhibition of Swe1 activity. The model supports the idea that the morphogenesis checkpoint, like other checkpoints, raises the cell size threshold for progression from one phase of the cell cycle to the next.
This a model from the article: Limit cycle models for circadian rhythms based on transcriptional regulation in Drosophila and Neurospora. Leloup JC, Gonze D, Goldbeter A. J Biol Rhythms.1999 Dec;14(6):433-48. 10643740, Abstract: We examine theoretical models for circadian oscillations based on transcriptional regulation in Drosophila and Neurospora. For Drosophila, the molecular model is based on the negative feedback exerted on the expression of the per and tim genes by the complex formed between the PER and TIM proteins. For Neurospora, similarly, the model relies on the feedback exerted on the expression of the frq gene by its protein product FRQ. In both models, sustained rhythmic variations in protein and mRNA levels occur in continuous darkness, in the form of limit cycle oscillations. The effect of light on circadian rhythms is taken into account in the models by considering that it triggers degradation of the TIM protein in Drosophila, and frq transcription in Neurospora. When incorporating the control exerted by light at the molecular level, we show that the models can account for the entrainment of circadian rhythms by light-dark cycles and for the damping of the oscillations in constant light, though such damping occurs more readily in the Drosophila model. The models account for the phase shifts induced by light pulses and allow the construction of phase response curves. These compare well with experimental results obtained in Drosophila. The model for Drosophila shows that when applied at the appropriate phase, light pulses of appropriate duration and magnitude can permanently or transiently suppress circadian rhythmicity. We investigate the effects of the magnitude of light-induced changes on oscillatory behavior. Finally, we discuss the common and distinctive features of circadian oscillations in the two organisms.
This particular version of the model has been translated from equations 1a-1j (Drosophila).
This model was taken from the CellML repository and automatically converted to SBML. The original model was: Leloup JC, Gonze D, Goldbeter A. (1999) - version02 The original CellML model was created by: Lloyd, Catherine, May c.lloyd@aukland.ac.nz The University of Auckland The Bioengineering Institute
This a model from the article: Limit cycle models for circadian rhythms based on transcriptional regulation in Drosophila and Neurospora. Leloup JC, Gonze D, Goldbeter A. J Biol Rhythms. 1999 Dec;14(6):433-48. 10643740 , Abstract: We examine theoretical models for circadian oscillations based on transcriptional regulation in Drosophila and Neurospora. For Drosophila, the molecular model is based on the negative feedback exerted on the expression of the per and tim genes by the complex formed between the PER and TIM proteins. For Neurospora, similarly, the model relies on the feedback exerted on the expression of the frq gene by its protein product FRQ. In both models, sustained rhythmic variations in protein and mRNA levels occur in continuous darkness, in the form of limit cycle oscillations. The effect of light on circadian rhythms is taken into account in the models by considering that it triggers degradation of the TIM protein in Drosophila, and frq transcription in Neurospora. When incorporating the control exerted by light at the molecular level, we show that the models can account for the entrainment of circadian rhythms by light-dark cycles and for the damping of the oscillations in constant light, though such damping occurs more readily in the Drosophila model. The models account for the phase shifts induced by light pulses and allow the construction of phase response curves. These compare well with experimental results obtained in Drosophila. The model for Drosophila shows that when applied at the appropriate phase, light pulses of appropriate duration and magnitude can permanently or transiently suppress circadian rhythmicity. We investigate the effects of the magnitude of light-induced changes on oscillatory behavior. Finally, we discuss the common and distinctive features of circadian oscillations in the two organisms.
This particular version of the model has been translated from equations 4a-4c (Neurospora).
This model was taken from the CellML repository and automatically converted to SBML. The original model was: Leloup JC, Gonze D, Goldbeter A. (1999) - version02 The original CellML model was created by: Lloyd, Catherine, May c.lloyd@aukland.ac.nz The University of Auckland The Bioengineering Institute
This a model from the article: Hypoxia-dependent sequestration of an oxygen sensor by a widespread structural motif can shape the hypoxic response - a predictive kinetic model Bernhard Schmierer, B\u00e9la Nov\u00e1k1 and Christopher J Schofield BMC Systems Biology2010, 4:139 20955552, Abstract: Background The activity of the heterodimeric transcription factor hypoxia inducible factor (HIF) is regulated by the post-translational, oxygen-dependent hydroxylation of its \u03b1-subunit by members of the prolyl hydroxylase domain (PHD or EGLN)-family and by factor inhibiting HIF (FIH). PHD-dependent hydroxylation targets HIF\u03b1 for rapid proteasomal degradation; FIH-catalysed asparaginyl-hydroxylation of the C-terminal transactivation domain (CAD) of HIF\u03b1 suppresses the CAD-dependent subset of the extensive transcriptional responses induced by HIF. FIH can also hydroxylate ankyrin-repeat domain (ARD) proteins, a large group of proteins which are functionally unrelated but share common structural features. Competition by ARD proteins for FIH is hypothesised to affect FIH activity towards HIF\u03b1; however the extent of this competition and its effect on the HIF-dependent hypoxic response are unknown. Results To analyse if and in which way the FIH/ARD protein interaction affects HIF-activity, we created a rate equation model. Our model predicts that an oxygen-regulated sequestration of FIH by ARD proteins significantly shapes the input/output characteristics of the HIF system. The FIH/ARD protein interaction is predicted to create an oxygen threshold for HIF\u03b1 CAD-hydroxylation and to significantly sharpen the signal/response curves, which not only focuses HIF\u03b1 CAD-hydroxylation into a defined range of oxygen tensions, but also makes the response ultrasensitive to varying oxygen tensions. Our model further suggests that the hydroxylation status of the ARD protein pool can encode the strength and the duration of a hypoxic episode, which may allow cells to memorise these features for a certain time period after reoxygenation. Conclusions The FIH/ARD protein interaction has the potential to contribute to oxygen-range finding, can sensitise the response to changes in oxygen levels, and can provide a memory of the strength and the duration of a hypoxic episode. These emergent properties are predicted to significantly shape the characteristics of HIF activity in animal cells. We argue that the FIH/ARD interaction should be taken into account in studies of the effect of pharmacological inhibition of the HIF-hydroxylases and propose that the interaction of a signalling sensor with a large group of proteins might be a general mechanism for the regulation of signalling pathways.
There are there models described in the paper. 1) Skeleton Model 1 (SKM1) - HIF\u03b1 CAD-hydroxylation in the absence of the FIH/AR-interaction. 2) Skeleton Model 2 (SKM2) - FIG sequestration by ARD proteins and oxygen-dependent FIH-release. 3) Full Model (Fusion of SKM1 and SKM2) - the effects of the FIH/ARD proteins interaction on HIF\u03b1 CAD-hydroxylation.
This model corresponds to the \"Full Model\" described in the paper. The model reproduces figure 5 of the publication.
\t This is the model of the RTC3 counter described in the article: Synthetic gene networks that count. \t Friedland AE, Lu TK, Wang X, Shi D, Church G, Collins JJ. Science. 2009 May 29;324(5931):1199-202. PMID:19478183, DOI:10.1126/science.1172005
\t Abstract: \t Synthetic gene networks can be constructed to emulate digital circuits and devices, giving one the ability to program and design cells with some of the principles of modern computing, such as counting. A cellular counter would enable complex synthetic programming and a variety of biotechnology applications. Here, we report two complementary synthetic genetic counters in Escherichia coli that can count up to three induction events: the first, a riboregulated transcriptional cascade, and the second, a recombinase-based cascade of memory units. These modular devices permit counting of varied user-defined inputs over a range of frequencies and can be expanded to count higher numbers.\t
\t The 3 arabinose pulses are implemented using events, one for the start of pulses and one for the end. The variable pulse_flag changes arabinose consumption to fit behaviour during pulses and in between. To simulate two pulses only, set the pulse length of the third pulse to a negative value (though with an absolute value smaller than the pulse intervall length). \t
Originally created by libAntimony v1.4 (using libSBML 3.4.1)
This is a model of one presynaptic and one postsynaptic cell, as described in the article: Gamma oscillation by synaptic inhibition in a hippocampal interneuronal network model. Wang XJ, Buzs\u00e1ki G. J Neurosci. 1996 Oct 15;16(20):6402-13. PMID:8815919;\t
Abstract: Fast neuronal oscillations (gamma, 20-80 Hz) have been observed in the neocortex and hippocampus during behavioral arousal. Using computer simulations, we investigated the hypothesis that such rhythmic activity can emerge in a random network of interconnected GABAergic fast-spiking interneurons. Specific conditions for the population synchronization, on properties of single cells and the circuit, were identified. These include the following: (1) that the amplitude of spike afterhyperpolarization be above the GABAA synaptic reversal potential; (2) that the ratio between the synaptic decay time constant and the oscillation period be sufficiently large; (3) that the effects of heterogeneities be modest because of a steep frequency-current relationship of fast-spiking neurons. Furthermore, using a population coherence measure, based on coincident firings of neural pairs, it is demonstrated that large-scale network synchronization requires a critical (minimal) average number of synaptic contacts per cell, which is not sensitive to the network size. By changing the GABAA synaptic maximal conductance, synaptic decay time constant, or the mean external excitatory drive to the network, the neuronal firing frequencies were gradually and monotonically varied. By contrast, the network synchronization was found to be high only within a frequency band coinciding with the gamma (20-80 Hz) range. We conclude that the GABAA synaptic transmission provides a suitable mechanism for synchronized gamma oscillations in a sparsely connected network of fast-spiking interneurons. In turn, the interneuronal network can presumably maintain subthreshold oscillations in principal cell populations and serve to synchronize discharges of spatially distributed neurons.\t
\t The presynaptic and postsynaptic cell have identical parameters and the variables in each cell are identified by using _pre or _post as a postfix to their names. The presynaptic cell influences the postsynaptic one via the synapse (variables and parameters: I_syn, E_syn, g_syn, F, theta_syn, alpha, beta). The applied current to the presynaptic cell, I_app_pre, is set to 2 microA/cm2 for 10 ms as in figure 1C of the article. The dependence of the postsynaptic cell on directly applied current can be investigated in isolation by setting I_app_pre to 0 and altering I_app_post. \t
Originally created by libAntimony v1.4 (using libSBML 3.4.1)
This is the continuous deterministic (ODE) model of the complement system described in the article: Computational and Experimental Study of the Regulatory Mechanisms of the Complement System. Liu B, Zhang J, Tan PY, Hsu D, Blom AM, Leong B, Sethi S, Ho B, Ding JL and Thiagarajan PS. PLoS Comp. Bio. 2011 Jan. 7:1; doi:10.1371/journal.pcbi.1001059
Abstract: The complement system is key to innate immunity and its activation is necessary for the clearance of bacteria and apoptotic cells. However, insufficient or excessive complement activation will lead to immune-related diseases. It is so far unknown how the complement activity is up- or down- regulated and what the associated pathophysiological mechanisms are. To quantitatively understand the modulatory mechanisms of the complement system, we built a computational model involving the enhancement and suppression mechanisms that regulate complement activity. Our model consists of a large system of Ordinary Differential Equations (ODEs) accompanied by a dynamic Bayesian network as a probabilistic approximation of the ODE dynamics. Applying Bayesian inference techniques, this approximation was used to perform parameter estimation and sensitivity analysis. Our combined computational and experimental study showed that the antimicrobial response is sensitive to changes in pH and calcium levels, which determines the strength of the crosstalk between CRP and L-ficolin. Our study also revealed differential regulatory effects of C4BP. While C4BP delays but does not decrease the classical complement activation, it attenuates but does not significantly delay the lectin pathway activation. We also found that the major inhibitory role of C4BP is to facilitate the decay of C3 convertase. In summary, the present work elucidates the regulatory mechanisms of the complement system and demonstrates how the bio-pathway machinery maintains the balance between activation and inhibition. The insights we have gained could contribute to the development of therapies targeting the complement system.
Comment: Reproduction of figures in the article: Figure 5: the effects of C4BP Fig 5A: set initial concentrations PC=0.0327796, GlcNac=0, vary the initial concentration of C4BP from 2.6 to 2600 using parameter scan Fig 5B: set initial concentrations PC=0, GlcNac=0.0327796, vary the initial concentration of C4BP from 2.6 to 2600 using parameter scan Figure 6: knockout simulations Set PC=0.0327796, GlcNac=0 Fig 6A: kf01=0, kf02=0 Fig 6B: kf04=0, kf06=0, kf07=0 Fig 6C: kf05=0 Fig 6D: kf03=0
This a model from the article: Bifurcation and resonance in a model for bursting nerve cells. Plant RE J Math Biol1981 Jan; 11(1): 15-32 7252375, Abstract: In this paper we consider a model for the phenomenon of bursting in nerve cells. Experimental evidence indicates that this phenomenon is due to the interaction of multiple conductances with very different kinetics, and the model incorporates this evidence. As a parameter is varied the model undergoes a transition between two oscillatory waveforms; a corresponding transition is observed experimentally. After establishing the periodicity of the subcritical oscillatory solution, the nature of the transition is studied. It is found to be a resonance bifurcation, with the solution branching at the critical point to another periodic solution of the same period. Using this result a comparison is made between the model and experimental observations. The model is found to predict and allow an interpretation of these observations.
This is the 2 state model of Myosin V movement described in the article: A simple kinetic model describes the processivity of myosin-v. Kolomeisky AB , Fisher ME Biophys. J. 84(3):1642-50 (2003); PubmedID: 12609867
Abstract: Myosin-V is a motor protein responsible for organelle and vesicle transport in cells. Recent single-molecule experiments have shown that it is an efficient processive motor that walks along actin filaments taking steps of mean size close to 36 nm. A theoretical study of myosin-V motility is presented following an approach used successfully to analyze the dynamics of conventional kinesin but also taking some account of step-size variations. Much of the present experimental data for myosin-V can be well described by a two-state chemical kinetic model with three load-dependent rates. In addition, the analysis predicts the variation of the mean velocity and of the randomness-a quantitative measure of the stochastic deviations from uniform, constant-speed motion-with ATP concentration under both resisting and assisting loads, and indicates a substep of size d(0) approximately 13-14 nm (from the ATP-binding state) that appears to accord with independent observations.
The model differs slightly from the published version. The ATP and ADP bound forms of myosin are called S0 and S1. The state transition and binding constants are called k_1, k_2, k_3 and k_4 instead of k00, u01, k'0 and w01. Similarly the state loading factors are named th_1, th_2, th_3 and th_4 instead of \u03b8+0, \u03b8+1, \u03b8-0 and \u03b8-1. The species fwd_step1, fwd_step2, back_step1 and back_step2 count the number of state changes of each kind the myosine molecules have taken over time. The model can be evaluated in a deterministic continuous or stochastic discreet fashion. The parameter V holds the (forward) speed at each time point, the V_avg the overall way divided by the simulation time and the amount of myosine molecules.
Originally created by libAntimony v1.4 (using libSBML 3.4.1)
This is an SBML implementation the model of the activator inhibitor oscillator (figure 2b) described in the article: Sniffers, buzzers, toggles and blinkers: dynamics of regulatory and signaling pathways in the cell. Tyson JJ, Chen KC, Novak B. Curr Opin Cell Biol. 2003 Apr;15(2):221-31. PubmedID:12648679; DOI:10.1016/S0955-0674(03)00017-6;
Abstract: The physiological responses of cells to external and internal stimuli are governed by genes and proteins interacting in complex networks whose dynamical properties are impossible to understand by intuitive reasoning alone. Recent advances by theoretical biologists have demonstrated that molecular regulatory networks can be accurately modeled in mathematical terms. These models shed light on the design principles of biological control systems and make predictions that have been verified experimentally.
Originally created by libAntimony v1.4 (using libSBML 3.4.1)
This is an SBML implementation the model of the substrate depletion oscillator (figure 2c) described in the article: Sniffers, buzzers, toggles and blinkers: dynamics of regulatory and signaling pathways in the cell. Tyson JJ, Chen KC, Novak B. Curr Opin Cell Biol. 2003 Apr;15(2):221-31. PubmedID:12648679; DOI:10.1016/S0955-0674(03)00017-6;
Abstract: The physiological responses of cells to external and internal stimuli are governed by genes and proteins interacting in complex networks whose dynamical properties are impossible to understand by intuitive reasoning alone. Recent advances by theoretical biologists have demonstrated that molecular regulatory networks can be accurately modeled in mathematical terms. These models shed light on the design principles of biological control systems and make predictions that have been verified experimentally.
Originally created by libAntimony v1.4 (using libSBML 3.4.1)
Originally created by libAntimony v1.4 (using libSBML 3.4.1)
This is an SBML implementation the model of negative feedback oscillator (figure 2a) described in the article: Sniffers, buzzers, toggles and blinkers: dynamics of regulatory and signaling pathways in the cell. Tyson JJ, Chen KC, Novak B. Curr Opin Cell Biol. 2003 Apr;15(2):221-31. PubmedID:12648679; DOI:10.1016/S0955-0674(03)00017-6;
Abstract: The physiological responses of cells to external and internal stimuli are governed by genes and proteins interacting in complex networks whose dynamical properties are impossible to understand by intuitive reasoning alone. Recent advances by theoretical biologists have demonstrated that molecular regulatory networks can be accurately modeled in mathematical terms. These models shed light on the design principles of biological control systems and make predictions that have been verified experimentally.
Originally created by libAntimony v1.4 (using libSBML 3.4.1)
This is an SBML implementation the model of homeostastis by negative feedback (figure 1g) described in the article: Sniffers, buzzers, toggles and blinkers: dynamics of regulatory and signaling pathways in the cell. Tyson JJ, Chen KC, Novak B. Curr Opin Cell Biol. 2003 Apr;15(2):221-31. PubmedID:12648679; DOI:10.1016/S0955-0674(03)00017-6;
Abstract: The physiological responses of cells to external and internal stimuli are governed by genes and proteins interacting in complex networks whose dynamical properties are impossible to understand by intuitive reasoning alone. Recent advances by theoretical biologists have demonstrated that molecular regulatory networks can be accurately modeled in mathematical terms. These models shed light on the design principles of biological control systems and make predictions that have been verified experimentally.
Originally created by libAntimony v1.4 (using libSBML 3.4.1)
This is an SBML implementation the model of mutual inhibition (figure 1f) described in the article: Sniffers, buzzers, toggles and blinkers: dynamics of regulatory and signaling pathways in the cell. Tyson JJ, Chen KC, Novak B. Curr Opin Cell Biol. 2003 Apr;15(2):221-31. PubmedID:12648679; DOI:10.1016/S0955-0674(03)00017-6;
Abstract: The physiological responses of cells to external and internal stimuli are governed by genes and proteins interacting in complex networks whose dynamical properties are impossible to understand by intuitive reasoning alone. Recent advances by theoretical biologists have demonstrated that molecular regulatory networks can be accurately modeled in mathematical terms. These models shed light on the design principles of biological control systems and make predictions that have been verified experimentally.
Originally created by libAntimony v1.4 (using libSBML 3.4.1)
This is an SBML implementation the model of mutual activation (figure 1e) described in the article: Sniffers, buzzers, toggles and blinkers: dynamics of regulatory and signaling pathways in the cell. Tyson JJ, Chen KC, Novak B. Curr Opin Cell Biol. 2003 Apr;15(2):221-31. PubmedID:12648679; DOI:10.1016/S0955-0674(03)00017-6;
Abstract: The physiological responses of cells to external and internal stimuli are governed by genes and proteins interacting in complex networks whose dynamical properties are impossible to understand by intuitive reasoning alone. Recent advances by theoretical biologists have demonstrated that molecular regulatory networks can be accurately modeled in mathematical terms. These models shed light on the design principles of biological control systems and make predictions that have been verified experimentally.
The article has a typo: the expression k2*X*R most likely should be k2*R
Originally created by libAntimony v1.4 (using libSBML 3.4.1)
This is an SBML implementation the model of the perfect adaptor (figure 1d) described in the article: Sniffers, buzzers, toggles and blinkers: dynamics of regulatory and signaling pathways in the cell. Tyson JJ, Chen KC, Novak B. Curr Opin Cell Biol. 2003 Apr;15(2):221-31. PubmedID:12648679; DOI:10.1016/S0955-0674(03)00017-6;
Abstract: The physiological responses of cells to external and internal stimuli are governed by genes and proteins interacting in complex networks whose dynamical properties are impossible to understand by intuitive reasoning alone. Recent advances by theoretical biologists have demonstrated that molecular regulatory networks can be accurately modeled in mathematical terms. These models shed light on the design principles of biological control systems and make predictions that have been verified experimentally.
Originally created by libAntimony v1.4 (using libSBML 3.4.1)
This is the model of IL13 induced signalling in MedB-1 cell described in the article: Dynamic Mathematical Modeling of IL13-Induced Signaling in Hodgkin and Primary Mediastinal B-Cell Lymphoma Allows Prediction of Therapeutic Targets. Raia V, Schilling M, B\u00f6hm M, Hahn B, Kowarsch A, Raue A, Sticht C, Bohl S, Saile M, M\u00f6ller P, Gretz N, Timmer J, Theis F, Lehmann WD, Lichter P and Klingm\u00fcller U. Cancer Res. 2011 Feb 1;71(3):693-704. PubmedID:21127196; DOI:10.1158/0008-5472.CAN-10-2987 Abstract: Primary mediastinal B-cell lymphoma (PMBL) and classical Hodgkin lymphoma (cHL) share a frequent constitutive activation of JAK (Janus kinase)/STAT signaling pathway. Because of complex, nonlinear relations within the pathway, key dynamic properties remained to be identified to predict possible strategies for intervention. We report the development of dynamic pathway models based on quantitative data collected on signaling components of JAK/STAT pathway in two lymphoma-derived cell lines, MedB-1 and L1236, representative of PMBL and cHL, respectively. We show that the amounts of STAT5 and STAT6 are higher whereas those of SHP1 are lower in the two lymphoma cell lines than in normal B cells. Distinctively, L1236 cells harbor more JAK2 and less SHP1 molecules per cell than MedB-1 or control cells. In both lymphoma cell lines, we observe interleukin-13 (IL13)-induced activation of IL4 receptor \u03b1, JAK2, and STAT5, but not of STAT6. Genome-wide, 11 early and 16 sustained genes are upregulated by IL13 in both lymphoma cell lines. Specifically, the known STAT-inducible negative regulators CISH and SOCS3 are upregulated within 2 hours in MedB-1 but not in L1236 cells. On the basis of this detailed quantitative information, we established two mathematical models, MedB-1 and L1236 model, able to describe the respective experimental data. Most of the model parameters are identifiable and therefore the models are predictive. Sensitivity analysis of the model identifies six possible therapeutic targets able to reduce gene expression levels in L1236 cells and three in MedB-1. We experimentally confirm reduction in target gene expression in response to inhibition of STAT5 phosphorylation, thereby validating one of the predicted targets.
All concentrations in the model, apart from IL13, are in molecules/cell. IL13 is given in ng/ml. As the cell volume is not explicitely given in the article, it is just approximately derived from the MW of IL13 () and the conversion factor 2.265 molecules IL13/cell = 1 ng/ml to be around 60 fl.
SBML model exported from PottersWheel on 2010-08-10 12:14:57. Inline follows the original matlab code:
This is the model of IL13 induced signalling in L1236 cells described in the article: Dynamic Mathematical Modeling of IL13-Induced Signaling in Hodgkin and Primary Mediastinal B-Cell Lymphoma Allows Prediction of Therapeutic Targets. Raia V, Schilling M, B\u00f6hm M, Hahn B, Kowarsch A, Raue A, Sticht C, Bohl S, Saile M, M\u00f6ller P, Gretz N, Timmer J, Theis F, Lehmann WD, Lichter P and Klingm\u00fcller U. Cancer Res. 2011 Feb 1;71(3):693-704. PubmedID: 21127196 ; DOI: 10.1158/0008-5472.CAN-10-2987 Abstract: Primary mediastinal B-cell lymphoma (PMBL) and classical Hodgkin lymphoma (cHL) share a frequent constitutive activation of JAK (Janus kinase)/STAT signaling pathway. Because of complex, nonlinear relations within the pathway, key dynamic properties remained to be identified to predict possible strategies for intervention. We report the development of dynamic pathway models based on quantitative data collected on signaling components of JAK/STAT pathway in two lymphoma-derived cell lines, MedB-1 and L1236, representative of PMBL and cHL, respectively. We show that the amounts of STAT5 and STAT6 are higher whereas those of SHP1 are lower in the two lymphoma cell lines than in normal B cells. Distinctively, L1236 cells harbor more JAK2 and less SHP1 molecules per cell than MedB-1 or control cells. In both lymphoma cell lines, we observe interleukin-13 (IL13)-induced activation of IL4 receptor \u03b1, JAK2, and STAT5, but not of STAT6. Genome-wide, 11 early and 16 sustained genes are upregulated by IL13 in both lymphoma cell lines. Specifically, the known STAT-inducible negative regulators CISH and SOCS3 are upregulated within 2 hours in MedB-1 but not in L1236 cells. On the basis of this detailed quantitative information, we established two mathematical models, MedB-1 and L1236 model, able to describe the respective experimental data. Most of the model parameters are identifiable and therefore the models are predictive. Sensitivity analysis of the model identifies six possible therapeutic targets able to reduce gene expression levels in L1236 cells and three in MedB-1. We experimentally confirm reduction in target gene expression in response to inhibition of STAT5 phosphorylation, thereby validating one of the predicted targets.
All concentrations in the model, apart from IL13, are in molecules/cell. IL13 is given in ng/ml. As the cell volume is not explicitely given in the article, it is just approximately derived from the MW of IL13 (15.8 kDa) and the conversion factor 3.776 molecules IL13/cell = 1 ng/ml to be around 100 fl.
SBML model exported from PottersWheel on 2010-08-10 12:14:57. Inline follows the original matlab code:
This is the model of the in vitro DNA oscillator called oligator with the optmized set of parameters described in the article: Programming an in vitro DNA oscillator using a molecular networking strategy. Montagne K, Plasson R, Sakai Y, Fujii T, Rondelez Y. Mol Syst Biol. 2011 Feb 1;7:466. PubmedID:21283142, Doi:10.1038/msb.2010.120
Abstract: Living organisms perform and control complex behaviours by using webs of chemical reactions organized in precise networks. This powerful system concept, which is at the very core of biology, has recently become a new foundation for bioengineering. Remarkably, however, it is still extremely difficult to rationally create such network architectures in artificial, non-living and well-controlled settings. We introduce here a method for such a purpose, on the basis of standard DNA biochemistry. This approach is demonstrated by assembling de novo an efficient chemical oscillator: we encode the wiring of the corresponding network in the sequence of small DNA templates and obtain the predicted dynamics. Our results show that the rational cascading of standard elements opens the possibility to implement complex behaviours in vitro. Because of the simple and well-controlled environment, the corresponding chemical network is easily amenable to quantitative mathematical analysis. These synthetic systems may thus accelerate our understanding of the underlying principles of biological dynamic modules.
The model reproduces the time courses in fig 2B. The parameter identifiers of the reaction constants are not the same as in the supplemental material, but are just called kXd and kXr for the forward and backwards constant of reaction X respectively.
This is the coherent feed forward loop with an AND-gate like control of the response operon described in the article: Network motifs in the transcriptional regulation network of Escherichia coli Shai S. Shen-Orr, Ron Milo, Shmoolik Mangan, Uri Alon, Nat Genet 2002 31:64-68; PMID: 11967538 ; DOI: 10.1038/ng881 ;
Abstract: Little is known about the design principles of transcriptional regulation networks that control gene expression in cells. Recent advances in data collection and analysis, however, are generating unprecedented amounts of information about gene regulation networks. To understand these complex wiring diagrams, we sought to break down such networks into basic building blocks. We generalize the notion of motifs, widely used for sequence analysis, to the level of networks. We define 'network motifs' as patterns of interconnections that recur in many different parts of a network at frequencies much higher than those found in randomized networks. We applied new algorithms for systematically detecting network motifs to one of the best-characterized regulation networks, that of direct transcriptional interactions in Escherichia coli. We find that much of the network is composed of repeated appearances of three highly significant motifs. Each network motif has a specific function in determining gene expression, such as generating temporal expression programs and governing the responses to fluctuating external signals. The motif structure also allows an easily interpretable view of the entire known transcriptional network of the organism. This approach may help define the basic computational elements of other biological networks.
This model reproduces the timecourse presented in Figure 2a. All species and parameters in the model are dimensionless.
This is the single input module, SIM, described in the article: Network motifs in the transcriptional regulation network of Escherichia coli Shai S. Shen-Orr, Ron Milo, Shmoolik Mangan, Uri Alon, Nat Genet 2002 31:64-68; PMID:11967538; DOI:10.1038/ng881;
Abstract: Little is known about the design principles of transcriptional regulation networks that control gene expression in cells. Recent advances in data collection and analysis, however, are generating unprecedented amounts of information about gene regulation networks. To understand these complex wiring diagrams, we sought to break down such networks into basic building blocks. We generalize the notion of motifs, widely used for sequence analysis, to the level of networks. We define 'network motifs' as patterns of interconnections that recur in many different parts of a network at frequencies much higher than those found in randomized networks. We applied new algorithms for systematically detecting network motifs to one of the best-characterized regulation networks, that of direct transcriptional interactions in Escherichia coli. We find that much of the network is composed of repeated appearances of three highly significant motifs. Each network motif has a specific function in determining gene expression, such as generating temporal expression programs and governing the responses to fluctuating external signals. The motif structure also allows an easily interpretable view of the entire known transcriptional network of the organism. This approach may help define the basic computational elements of other biological networks.
This model reproduces the SIM timecourse presented in Figure 2b. All species and parameters in the model are dimensionless.
This is the model described in the article: A bistable Rb-E2F switch underlies the restriction point Guang Yao, Tae Jun Lee, Seiichi Mori, Joseph R. Nevins, Lingchong You, Nat Cell Biol 2008 10:476-482; PMID: 18364697 ; DOI: 10.1038/ncb1711 .
Abstract: The restriction point (R-point) marks the critical event when a mammalian cell commits to proliferation and becomes independent of growth stimulation. It is fundamental for normal differentiation and tissue homeostasis, and seems to be dysregulated in virtually all cancers. Although the R-point has been linked to various activities involved in the regulation of G1-S transition of the mammalian cell cycle, the underlying mechanism remains unclear. Using single-cell measurements, we show here that the Rb-E2F pathway functions as a bistable switch to convert graded serum inputs into all-or-none E2F responses. Once turned ON by sufficient serum stimulation, E2F can memorize and maintain this ON state independently of continuous serum stimulation. We further show that, at critical concentrations and duration of serum stimulation, bistable E2F activation correlates directly with the ability of a cell to traverse the R-point.
This model reproduces the serum-pulse stimulation-protocol in Figure 3(b).
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
In summary, you are entitled to use this encoded model in absolutely any manner you deem suitable, verbatim, or with modification, alone or embedded it in a larger context, redistribute it, commercially or not, in a restricted way or not.
This is the scaled model described in the article: Birhythmicity, chaos, and other patterns of temporal self-organization in a multiply regulated biochemical system Olivier Decroly, Albert Goldbeter, Proc Natl Acad Sci USA 1982 79:6917-6921; PMID:6960354;
Abstract: We analyze on a model biochemical system the effect of a coupling between two instability-generating mechanisms. The system considered is that of two allosteric enzymes coupled in series and activated by their respective products. In addition to simple periodic oscillations, the system can exhibit a variety of new modes of dynamic behavior; coexistence between two stable periodic regimes (birhythmicity), random oscillations (chaos), and coexistence of a stable periodic regime with a stable steady state (hard excitation) or with chaos. The relationship between these patterns of temporal self-organization is analyzed as a function of the control parameters of the model. Chaos and birhythmicity appear to be rare events in comparison with simple periodic behavior. We discuss the relevance of these results with respect to the regularity of most biological rhythms.
The parameters q1 = 50 and q2 = 0.02 are explicitely included as the stoichiometric coefficients of beta and gamma in the reactions r2 and r3, respectively. Parameter values and initial conditions [ks=1.99/sec, alpha(0)=29.19988, beta(0)=188.8, gamma(0)=0.3367] are for the chaotic regime presented in the upper-curve of Figure 3b.
Grange2001 - PK interaction of L-dopa and benserazide
A pharmacokinetics of L-dopa in rats after administration of L-dopa alone (BIOMD0000000321) or L-dopa combined with a peripheral AADC (amino-acid-decarboxylase) inhibitor (this model: BIOMD0000000320) has been studied using noncompartmental analysis.
PURPOSE: To study the PK interaction of L-dopa/benserazide in rats. METHODS: Male rats received a single oral dose of 80 mg/kg L-dopa or 20 mg/kg benserazide or 80/20 mg/kg L-dopa/benserazide. Based on plasma concentrations the kinetics of L-dopa, 3-O-methyldopa (3-OMD), benserazide, and its metabolite Ro 04-5127 were characterized by noncompartmental analysis and a compartmental model where total L-dopa clearance was the sum of the clearances mediated by amino-acid-decarboxylase (AADC), catechol-O-methyltransferase and other enzymes. In the model Ro 04-5127 inhibited competitively the L-dopa clearance by AADC.
RESULTS: The coadministration of L-dopa/benserazide resulted in a major increase in systemic exposure to L-dopa and 3-OMD and a decrease in L-dopa clearance. The compartmental model allowed an adequate description of the observed L-dopa and 3-OMD concentrations in the absence and presence of benserazide. It had an advantage over noncompartmental analysis because it could describe the temporal change of inhibition and recovery of AADC.
CONCLUSIONS: Our study is the first investigation where the kinetics of benserazide and Ro 04-5127 have been described by a compartmental model. The L-dopa/benserazide model allowed a mechanism-based view of the L-dopa/benserazide interaction and supports the hypothesis that Ro 04-5127 is the primary active metabolite of benserazide.
The volumes and variables in this model are taken for a rat with 0.25 kg. The inital dose for L_Dopa (L_Dopa_per_kg_rat) and Benserazide (Benserazide_per_kg_rat) are to be given in umole per kg. 80 mg/kg L-Dopa correspond to 404 umol/kg, 20 mg/kg benserazide to 78 umol/kg. To change the model to a different mass of rat the compartment volumes, and the parameters rat_body_mass and Q have to changed accordingly.
The model has three species (A-dopa, A_B, A_M) whose initial concentrations are calculated from a listOfInitialAssignments . While running for the first time the time-course (24hrs) for this model in COPASI (up to version 4.6, Build 33), the resulting graph displays only straight lines for all the species. Any subsequent runs should provide proper plots (i.e. without making any change to the model, just by clicking the \"run\" button again).
The above issue is caused by some initial assignments which are not calculated when COPASI imports the file. This issue should not be present in newer releases of COPASI.
To the extent possible under law, all copyright and related orneighbouring rights to this encoded model have been dedicated to the publicdomain worldwide. Please refer to CC0 Public DomainDedication for more information.
A pharmacokinetics of L-dopa in rats after administration of L-dopa alone (this model: BIOMD0000000321) or L-dopa combined with a peripheral AADC (amino-acid-decarboxylase) inhibitor (BIOMD0000000320) has been studied using noncompartmental analysis.
PURPOSE: To study the PK interaction of L-dopa/benserazide in rats. METHODS: Male rats received a single oral dose of 80 mg/kg L-dopa or 20 mg/kg benserazide or 80/20 mg/kg L-dopa/benserazide. Based on plasma concentrations the kinetics of L-dopa, 3-O-methyldopa (3-OMD), benserazide, and its metabolite Ro 04-5127 were characterized by noncompartmental analysis and a compartmental model where total L-dopa clearance was the sum of the clearances mediated by amino-acid-decarboxylase (AADC), catechol-O-methyltransferase and other enzymes. In the model Ro 04-5127 inhibited competitively the L-dopa clearance by AADC.
RESULTS: The coadministration of L-dopa/benserazide resulted in a major increase in systemic exposure to L-dopa and 3-OMD and a decrease in L-dopa clearance. The compartmental model allowed an adequate description of the observed L-dopa and 3-OMD concentrations in the absence and presence of benserazide. It had an advantage over noncompartmental analysis because it could describe the temporal change of inhibition and recovery of AADC.
CONCLUSIONS: Our study is the first investigation where the kinetics of benserazide and Ro 04-5127 have been described by a compartmental model. The L-dopa/benserazide model allowed a mechanism-based view of the L-dopa/benserazide interaction and supports the hypothesis that Ro 04-5127 is the primary active metabolite of benserazide.
The model has a species (A-dopa) whose initial concentration is calculated from a listOfInitialAssignments . While running for the first time the time-course (24hrs) for this model in COPASI (up to version 4.6, Build 33), the resulting graph displays only straight lines for all the species. Any subsequent runs should provide proper plots (i.e. without making any change to the model, just by clicking the \"run\" button again).
The above issue is caused by some initial assignments which are not calculated when COPASI imports the file. This issue should not be present in newer releases of COPASI.
To the extent possible under law, all copyright and related orneighbouring rights to this encoded model have been dedicated to the publicdomain worldwide. Please refer to CC0 Public DomainDedication for more information.
This a model from the article: Synthetic in vitro transcriptional oscillators. Kim J, Winfree E Mol. Syst. Biol. 2011 Feb 1;7:465. 21283141 , Abstract: The construction of synthetic biochemical circuits from simple components illuminates how complex behaviors can arise in chemistry and builds a foundation for future biological technologies. A simplifiedanalog of genetic regulatory networks, in vitro transcriptional circuits, provides a modular platformfor the systematic construction of arbitrary circuits and requires only two essential enzymes, bacteriophage T7 RNA polymerase and Escherichia coli ribonuclease H, to produce and degrade RNA signals. In this study, we design and experimentally demonstrate three transcriptional oscillators in vitro. First, a negative feedback oscillator comprising two switches, regulated by excitatory and inhibitory RNA signals, showed up to five complete cycles. To demonstrate modularity and to explore the design space further, a positive-feedback loop was added that modulates and extends the oscillatory regime. Finally,a three-switch ring oscillator was constructed and analyzed. Mathematical modeling guided the design process, identified experimental conditions likely to yield oscillations, and explained the system's robust response to interference by short degradation products. Synthetic transcriptional oscillators could prove valuable for systematic exploration of biochemical circuit design principles and for controlling nanoscale devices and orchestrating processes within artificial cells.
Note:
The paper describes 7 models (MODEL1012090000-6) and all these are submitted by the authors. Thismodel (MODEL1012090000) corresponds to the Simple model for both mode I and II (Design I and II). The model reproduces timecourse figure plotted in the supplementary material (page 10 of Supplementary material) of the reference publication.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
In summary, you are entitled to use this encoded model in absolutely any manner you deem suitable, verbatim, or with modification, alone or embedded it in a larger context, redistribute it, commercially or not, in a restricted way or not.
This a model from the article: Synthetic in vitro transcriptional oscillators. Kim J, Winfree E Mol. Syst. Biol. 2011 Feb 1;7:465. 21283141 , Abstract: The construction of synthetic biochemical circuits from simple components illuminates how complex behaviors can arise in chemistry and builds a foundation for future biological technologies. A simplified analog of genetic regulatory networks, in vitro transcriptional circuits, provides a modular platform for the systematic construction of arbitrary circuits and requires only two essential enzymes, bacteriophage T7 RNA polymerase and Escherichia coli ribonuclease H, to produce and degrade RNA signals. In this study, we design and experimentally demonstrate three transcriptional oscillators in vitro. First, a negative feedback oscillator comprising two switches, regulated by excitatory and inhibitory RNA signals, showed up to five complete cycles. To demonstrate modularity and to explore the design space further, a positive-feedback loop was added that modulates and extends the oscillatory regime. Finally, a three-switch ring oscillator was constructed and analyzed. Mathematical modeling guided the design process, identified experimental conditions likely to yield oscillations, and explained the system's robust response to interference by short degradation products. Synthetic transcriptional oscillators could prove valuable for systematic exploration of biochemical circuit design principles and for controlling nanoscale devices and orchestrating processes within artificial cells.
Notes:
The paper describes 7 models (MODEL1012090000-6) and all these are submitted by the authors. This model (MODEL1012090001) corresponds to the Simple model of the three-switch ring oscillator (Design III). The model reproduces figure 6 (central figures) of the reference publication. The time is rescaled by s=v_d/K_I*t where K_I=0.333 and v_d=1 (for alpha = 1) and v_d=0.5 (for alpha = 0.5). i.e. For alpha = 1, s = 0.003 * t (roughly 10 unitless time = 1hr; the time-course should be run for 60 timeunits (6hrs) to get figure 6a). For alpha = 2, s= 0.0015 * t (roughly 5 unitless time = 1hr; the time-course shoue be run for 100 timesunits (20hrs) to get figure 6b).
This is the full model (eq. 1 and 2) of the voltage oscillations in barnacle muscle fibers described in the article: Voltage oscillations in the barnacle giant muscle fiber. \tMorris C, Lecar H. Biophys J. 1981 Jul;35(1):193-213. PubmedID:7260316; DOI:10.1016/S0006-3495(81)84782-0 \tAbstract: \tBarnacle muscle fibers subjected to constant current stimulation produce a variety of types of oscillatory behavior when the internal medium contains the Ca++ chelator EGTA. Oscillations are abolished if Ca++ is removed from the external medium, or if the K+ conductance is blocked. Available voltage-clamp data indicate that the cell's active conductance systems are exceptionally simple. Given the complexity of barnacle fiber voltage behavior, this seems paradoxical. This paper presents an analysis of the possible modes of behavior available to a system of two noninactivating conductance mechanisms, and indicates a good correspondence to the types of behavior exhibited by barnacle fiber. The differential equations of a simple equivalent circuit for the fiber are dealt with by means of some of the mathematical techniques of nonlinear mechanics. General features of the system are (a) a propensity to produce damped or sustained oscillations over a rather broad parameter range, and (b) considerable latitude in the shape of the oscillatory potentials. It is concluded that for cells subject to changeable parameters (either from cell to cell or with time during cellular activity), a system dominated by two noninactivating conductances can exhibit varied oscillatory and bistable behavior.
The model consists of the differential equations (1) and (2) given on pages 195 and 196 of the article. There is one typo in the equation for I in (1), gL(VL) should be gL(V - VL). This was changed in the SBML file. As there are no current values given, for reproducing the time courses in figure 6 an applied current of 50 uA was assumed. The legend for the broken and the full line in this figure seems to be confounded in the article.
Originally created by libAntimony v1.4 (using libSBML 3.4.1)
This is the model of the minmal 2 feedback switch described in the article: Synthetic conversion of a graded receptor signal into a tunable, reversible switch. Santhosh Palani and Casim A. Sarkar, 2011, Molecular Systems Biology 7:480; doi: 10.1038/msb.2011.13
The ability to engineer an all-or-none cellular response to a given signaling ligand is important in applications ranging from biosensing to tissue engineering. However, synthetic gene network switches have been limited in their applicability and tunability due to their reliance on specific components to function. Here, we present a strategy for reversible switch design that instead relies only on a robust, easily constructed network topology with two positive feedback loops and we apply the method to create highly ultrasensitive (nH420), bistable cellular responses to a synthetic ligand/receptor complex. Independent modulation of the two feedback strengths enables rational tuning and some decoupling of steady-state (ultrasensitivity, signal amplitude, switching threshold, and bistability) and kinetic (rates of system activation and deactivation) response properties.Our integrated computational and synthetic biology approach elucidates design rules for building cellular switches with desired properties, which may be of utility in engineering signal-transduction pathways.
This model is parametrised for a transcription factor and receptor feedback strength of 3, TFs = 3 and Rs = 3. To reproduce figure 1 E, the parameters TFs and Rs have to be varied accordingly.
Nomenclature for the model: L : Ligand R : Receptor C : Ligand-Receptor Complex I : Inactive Transcription Factor X : C bound to I A : Active Transcription Factor
This a model from the article: Network-level analysis of light adaptation in rod cells under normal and altered conditions. Dell'Orco D, Schmidt H, Mariani S, Fanelli F Mol Biosyst2009 Oct; 5(10):1232-46 19756313, Abstract: Photoreceptor cells finely adjust their sensitivity and electrical response according to changes in light stimuli as a direct consequence of the feedback and regulation mechanisms in the phototransduction cascade. In this study, we employed a systems biology approach to develop a dynamic model of vertebrate rod phototransduction that accounts for the details of the underlying biochemistry. Following a bottom-up strategy, we first reproduced the results of a robust model developed by Hamer et al. (Vis. Neurosci., 2005, 22(4), 417), and then added a number of additional cascade reactions including: (a) explicit reactions to simulate the interaction between the activated effector and the regulator of G-protein signalling (RGS); (b) a reaction for the reformation of the G-protein from separate subunits; (c) a reaction for rhodopsin (R) reconstitution from the association of the opsin apoprotein with the 11-cis-retinal chromophore; (d) reactions for the slow activation of the cascade by opsin. The extended network structure successfully reproduced a number of experimental conditions that were inaccessible to prior models. With a single set of parameters the model was able to predict qualitative and quantitative features of rod photoresponses to light stimuli ranging over five orders of magnitude, in normal and altered conditions, including genetic manipulations of the cascade components. In particular, the model reproduced the salient dynamic features of the rod from Rpe65(-/-) animals, a well established model for Leber congenital amaurosis and vitamin A deficiency. The results of this study suggest that a systems-level approach can help to unravel the adaptation mechanisms in normal and in disease-associated conditions on a molecular basis.
Note:
Figure 7 of the reference is reproduced here. Each plot is obtained by increasing flash strength. More details about generating the plots can be obtained from the comments in the curation figure (go to curation tab).
A mathematical model of the pancreatic duct cell generating high bicarbonate concentrations in pancreatic juice David C Whitcomb, G Bard Ermentrout, Pancreas 2004 29:e30-40; PubMedID:15257112
Abstract: OBJECTIVE:To develop a simple, physiologically based mathematical model of pancreatic duct cell secretion using experimentally derived parameters that generates pancreatic fluid bicarbonate concentrations of >140 mM after CFTR activation. METHODS:A new mathematical model was developed simulating a duct cell within a proximal pancreatic duct and included a sodium-2-bicarbonate cotransporter (NBC) and sodium-potassium pump (NaK pump) on a chloride-impermeable basolateral membrane, CFTR on the luminal membrane with 0.2 to 1 bicarbonate to chloride permeability ratio. Chloride-bicarbonate antiporters (Cl/HCO3 AP) were added or subtracted from the basolateral (APb) and luminal (APl) membranes. The model was integrated over time using XPPAUT. RESULTS:This model predicts robust, NaK pump-dependent bicarbonate secretion with opening of the CFTR, generates and maintains pancreatic fluid secretion with bicarbonate concentrations >140 mM, and returns to basal levels with CFTR closure. Limiting CFTR permeability to bicarbonate, as seen in some CFTR mutations, markedly inhibited pancreatic bicarbonate and fluid secretion. CONCLUSIONS:A simple CFTR-dependent duct cell model can explain active, high-volume, high-concentration bicarbonate secretion in pancreatic juice that reproduces the experimental findings. This model may also provide insight into why CFTR mutations that predominantly affect bicarbonate permeability predispose to pancreatic dysfunction in humans.
This SBML version of the model was created directly from the XPPAUT code found in the appendix with the exception of the parameter vr, the ratio between the duct cell volume and the duct lumen, which is defined inversely to the main text in the XPPAUT code. vr was defined as the ratio of the duct cell volume to the duct lumen volume as in the main text. The model reproduces the figures found in the article. The model uses initial assignments for the lumen volume and events to trigger CFTR opening, so only tools supporting these features can be used to simulate it (eg. Copasi and SBW/Roadrunner).
This is the model of atorvastatin metabolism in hepaitc cells described in the article: A systems biology approach to dynamic modeling and inter-subject variability of statin pharmacokinetics in human hepatocytes Joachim Bucher , Stephan Riedmaier , Anke Schnabel , Katrin Marcus , Gabriele Vacun , Thomas S Weiss , Wolfgang E Thasler , Andreas K Nussler , Ulrich M Zanger and Matthias Reuss. BMC Systems Biology 2011, 5:66. DOI:10.1186/1752-0509-5-66
Abstract: Background: The individual character of pharmacokinetics is of great importance in the risk assessment of new drug leads in pharmacological research. Amongst others, it is severely influenced by the properties and inter-individual variability of the enzymes and transporters of the drug detoxification system of the liver. Predicting individual drug biotransformation capacity requires quantitative and detailed models. Results: In this contribution we present the de novo deterministic modeling of atorvastatin biotransformation based on comprehensive published knowledge on involved metabolic and transport pathways as well as physicochemical properties. The model was evaluated in primary human hepatocytes and parameter identifiability analysis was performed under multiple experimental constraints. Dynamic simulations of atorvastatin biotransformation considering the inter-individual variability of the two major involved enzymes CYP3A4 and UGT1A3 based on quantitative protein expression data in a large human liver bank (n=150) highlighted the variability in the individual biotransformation profiles and therefore also points to the individuality of pharmacokinetics. Conclusions: A dynamic model for the biotransformation of atorvastatin has been developed using quantitative metabolite measurements in primary human hepatocytes. The model comprises kinetics for transport processes and metabolic enzymes as well as population liver expression data allowing us to assess the impact of inter-individual variability of concentrations of key proteins. Application of computational tools for parameter sensitivity analysis enabled us to considerably improve the validity of the model and to create a consistent framework for precise computer-aided simulations in toxicology.
The model is parameterized for patient 1 and reproduces the time courses in figure 2 of the article.
Simplified (3-variable) calcium oscillation model Kummer et al. (2000) Biophys. J. 79, 1188-1195 This model is defined in a small compartment with low concentrations. You can run it first with the LSODA ODE solver and then with the Gillespie Monte Carlo method (in Time Course widget). This illustrates that at low particle numbers, as here, the stochastic simulation and the ODE approach produce different results (the stochastic approach is more correct in these circumstances). This file also demonstrates the use of several different plots to visualize results, including a histogram.
Kummer U, Olsen LF, Dixon CJ, Green AK, Bornberg-Bauer E, Baier G.
Biophys. J. 2000 Sep; 79(3): 1188-1195
Abstract:
We present a new model for calcium oscillations based on experiments in hepatocytes. The model considers feedback inhibition on the initial agonist receptor complex by calcium and activated phospholipase C, as well as receptor type-dependent self-enhanced behavior of the activated G(alpha) subunit. It is able to show simple periodic oscillations and periodic bursting, and it is the first model to display chaotic bursting in response to agonist stimulations. Moreover, our model offers a possible explanation for the differences in dynamic behavior observed in response to different agonists in hepatocytes.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
This model is from the article: On the encoding and decoding of calcium signals in hepatocytes Ann Zahle Larsen, Lars Folke Olsen and Ursula Kummera Biophysical ChemistryVolume 107, Issue 1, 1 January 2004, Pages 83-99 14871603, Abstract: Many different agonists use calcium as a second messenger. Despite intensive research in intracellular calcium signalling it is an unsolved riddle how the different types of information represented by the different agonists, is encoded using the universal carrier calcium. It is also still not clear how the information encoded is decoded again into the intracellular specific information at the site of enzymes and genes. After the discovery of calcium oscillations, one likely mechanism is that information is encoded in the frequency, amplitude and waveform of the oscillations. This hypothesis has received some experimental support. However, the mechanism of decoding of oscillatory signals is still not known. Here, we study a mechanistic model of calcium oscillations, which is able to reproduce both spiking and bursting calcium oscillations. We use the model to study the decoding of calcium signals on the basis of co-operativity of calcium binding to various proteins. We show that this co-operativity offers a simple way to decode different calcium dynamics into different enzyme activities.
Note:
This model corresponds to the 5 variable receptor-operated model, as described by Larsen et al., 2004. This model is a modified version of the model described in Kummer 2000 (PMID:10968983)
This a model from the article: On the encoding and decoding of calcium signals in hepatocytes Ann Zahle Larsen, Lars Folke Olsen and Ursula Kummera Biophysical ChemistryVolume 107, Issue 1, 1 January 2004, Pages 83-99 14871603, Abstract: Many different agonists use calcium as a second messenger. Despite intensive research in intracellular calcium signalling it is an unsolved riddle how the different types of information represented by the different agonists, is encoded using the universal carrier calcium. It is also still not clear how the information encoded is decoded again into the intracellular specific information at the site of enzymes and genes. After the discovery of calcium oscillations, one likely mechanism is that information is encoded in the frequency, amplitude and waveform of the oscillations. This hypothesis has received some experimental support. However, the mechanism of decoding of oscillatory signals is still not known. Here, we study a mechanistic model of calcium oscillations, which is able to reproduce both spiking and bursting calcium oscillations. We use the model to study the decoding of calcium signals on the basis of co-operativity of calcium binding to various proteins. We show that this co-operativity offers a simple way to decode different calcium dynamics into different enzyme activities.
Note:
This model corresponds to the improved model eqn 1-7, as described by Larsen et al., 2004 implemented to investigate how the cell can decode different oscillations. This is done by introducing 2 more variables Enzyme and Product in addition to the 5 variables G-alpha, PLC, Ca_cyt, Ca_ER and Ca_mit receptor-operated model described in the first part of the paper. The receptor-operated model is itself a modified version of the model described in Kummer 2000 (PMID:10968983)
This model is from the article: Modelling thrombin generation in human ovarian follicular fluid Bungay Sharene D., Gentry Patricia A., Gentry Rodney D. Bulletin of Mathematical BiologyVolume 68, Issue 8, 12 July 2006, Pages 2283-302 16838084, Abstract: A mathematical model is constructed to study thrombin production in human ovarian follicular fluid. The model results show that the amount of thrombin that can be produced in ovarian follicular fluid is much lower than that in blood plasma, failing to reach the level required for fibrin formation, and thereby supporting the hypothesis that in follicular fluid thrombin functions to initiate cellular activities via intracellular signalling receptors. It is also concluded that the absence of the amplification pathway to thrombin production in follicular fluid is a major factor in restricting the amount of thrombin that can be produced. Titration of the initial concentrations of the various reactants in the model lead to predictions for the amount of tissue factor and phospholipid that is required to maintain thrombin production in the follicle, as well as to the conclusion that tissue factor pathway inhibitor has little effect on the time that thrombin generation is sustained. Numerical experiments to determine the effect of factor V, which is at a much reduced level in follicular fluid compared to plasma, and thrombomodulin, illustrate the importance for further experimental work to determine values for several parameters that have yet to be reported in the literature.
This model is from the article: Modelling thrombin generation in human ovarian follicular fluid Bungay Sharene D., Gentry Patricia A., Gentry Rodney D. Bulletin of Mathematical BiologyVolume 68, Issue 8, 12 July 2006, Pages 2283-302 16838084, Abstract: A mathematical model is constructed to study thrombin production in human ovarian follicular fluid. The model results show that the amount of thrombin that can be produced in ovarian follicular fluid is much lower than that in blood plasma, failing to reach the level required for fibrin formation, and thereby supporting the hypothesis that in follicular fluid thrombin functions to initiate cellular activities via intracellular signalling receptors. It is also concluded that the absence of the amplification pathway to thrombin production in follicular fluid is a major factor in restricting the amount of thrombin that can be produced. Titration of the initial concentrations of the various reactants in the model lead to predictions for the amount of tissue factor and phospholipid that is required to maintain thrombin production in the follicle, as well as to the conclusion that tissue factor pathway inhibitor has little effect on the time that thrombin generation is sustained. Numerical experiments to determine the effect of factor V, which is at a much reduced level in follicular fluid compared to plasma, and thrombomodulin, illustrate the importance for further experimental work to determine values for several parameters that have yet to be reported in the literature.
This model is from the article: A mathematical model of lipid-mediated thrombin generation Bungay Sharene D., Gentry Patricia A., Gentry Rodney D. Mathematical Medicine and BiologyVolume 20, Issue 1, 1 March 2003, Pages 105-29 12974500, Abstract: Thrombin is an enzyme that is generated in both vascular and non-vascular systems. In blood coagulation, a fundamental process in all species, thrombin induces the formation of a fibrin clot. A dynamical model of thrombin generation in the presence of lipid surfaces is presented. This model also includes the self-regulating thrombin feedback reactions, the thrombomodulin-protein C-protein S inhibitory system, tissue factor pathway inhibitor (TFPI), and the inhibitor, antithrombin (AT). The dynamics of this complex system were found to be highly lipid dependent, as would be expected from experimental studies. Simulations of this model indicate that a threshold lipid level is required to generate physiologically relevant amounts of thrombin. The dependence of the onset, the peak levels, and the duration of thrombin generation on lipid was saturable. The lipid concentration affects the way in which the inhibitors modulate thrombin production. A novel feature of this model is the inclusion of the dynamical protein C pathway, initiated by thrombin feedback. This inhibitory system exerts its effects on the lipid surface, where its substrates are formed. The maximum impact of TFPI occurs at intermediate vesicle concentrations. Inhibition by AT is only indirectly affected by the lipid since AT irreversibly binds only to solution phase proteins. In a system with normal plasma concentrations of the proteins involved in thrombin formation, the combination of these three inhibitors is sufficient both to effectively stop thrombin generation prior to the exhaustion of its precursor, prothrombin, and to inhibit all thrombin formed. This model can be used to predict thrombin generation under extreme lipid conditions that are difficult to implement experimentally and to examine thrombin generation in non-vascular systems.
This model is from the article: A model for the stoichiometric regulation of blood coagulation. Hockin MF, Jones KC, Everse SJ, Mann KG. Journal of Biological ChemistryVolume 277, Issue 21, 24 May 2002, Pages 18322 -18333 11893748, Abstract: We have developed a model of the extrinsic blood coagulation system that includes the stoichiometric anticoagulants. The model accounts for the formation, expression, and propagation of the vitamin K-dependent procoagulant complexes and extends our previous model by including: (a) the tissue factor pathway inhibitor (TFPI)-mediated inactivation of tissue factor (TF).VIIa and its product complexes; (b) the antithrombin-III (AT-III)-mediated inactivation of IIa, mIIa, factor VIIa, factor IXa, and factor Xa; (c) the initial activation of factor V and factor VIII by thrombin generated by factor Xa-membrane; (d) factor VIIIa dissociation/activity loss; (e) the binding competition and kinetic activation steps that exist between TF and factors VII and VIIa; and (f) the activation of factor VII by IIa, factor Xa, and factor IXa. These additions to our earlier model generate a model consisting of 34 differential equations with 42 rate constants that together describe the 27 independent equilibrium expressions, which describe the fates of 34 species. Simulations are initiated by \"exposing\" picomolar concentrations of TF to an electronic milieu consisting of factors II, IX, X, VII, VIIa, V, and VIIII, and the anticoagulants TFPI and AT-III at concentrations found in normal plasma or associated with coagulation pathology. The reaction followed in terms of thrombin generation, proceeds through phases that can be operationally defined as initiation, propagation, and termination. The generation of thrombin displays a nonlinear dependence upon TF, AT-III, and TFPI and the combination of these latter inhibitors displays kinetic thresholds. At subthreshold TF, thrombin production/expression is suppressed by the combination of TFPI and AT-III; for concentrations above the TF threshold, the bolus of thrombin produced is quantitatively equivalent. A comparison of the model with empirical laboratory data illustrates that most experimentally observable parameters are captured, and the pathology that results in enhanced or deficient thrombin generation is accurately described.
A mathematical simulation of the tissue factor pathway to the generation of thrombin has been developed using a combination of empirical, estimated, and deduced rate constants for reactions involving the activation of factor IX, X, V, and VIII, in the formation of thrombin, as well as rate constants for the assembly of the coagulation enzyme complexes which involve factor VIIIa-factor IXa (intrinsic tenase) and factor Va-Xa (prothrombinase) assembled on phospholipid membrane. Differential equations describing the fate of each species in the reaction were developed and solved using an interactive procedure based upon the Runge-Kutta technique. In addition to the theoretical considerations involving the reactions of the tissue factor pathway, a physical constraint associated with the stability of the factor VIIIa-factor IXa complex has been incorporated into the model based upon the empirical observations associated with the stability of this complex. The model system provides a realistic accounting of the fates of each of the proteins in the coagulation reaction through a range of initiator (factor VIIa-tissue factor) concentrations ranging from 5 pM to 5 nM. The model is responsive to alterations in the concentrations of factor VIII, factor V, and their respective activated species, factor VIIIa and factor Va, and overall provides a reasonable approximation of empirical data. The computer model permits the assessment of the reaction over a broad range of conditions and provides a useful tool for the development and management of reaction studies.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
This model is from the article: Cooperation and Competition in the Evolution of ATP-Producing Pathways Thomas Pfeiffer, Stefan Schuster, Sebastian Bonhoeffer Science 2001 Apr; Volume:292 (Issue:5516); Page info:504-7 11283355 , Abstract: Heterotrophic organisms generally face a trade-off between rate and yield of adenosine triphosphate (ATP) production. This trade-off may result in an evolutionary dilemma, because cells with a higher rate but lower yield of ATP production may gain a selective advantage when competing for shared energy resources. Using an analysis of model simulations and biochemical observations, we show that ATP production with a low rate and high yield can be viewed as a form of cooperative resource use and may evolve in spatially structured environments. Furthermore, we argue that the high ATP yield of respiration may have facilitated the evolutionary transition from unicellular to undifferentiated multicellular organisms.
Note:
This model reproduces the competition and invasion described in Supplemental Figure 2.
This model is from the article: A comprehensive model for the humoral coagulation network in humans. Wajima T, Isbister GK, Duffull SB. Clinical Pharmacology and therapeuticsVolume 86, Issue 3, 10 June 2009, EPub 19516255, Abstract: Coagulation is an important process in hemostasis and comprises a complicated interaction of multiple enzymes and proteins. We have developed a mechanistic quantitative model of the coagulation network. The model accurately describes the time courses of coagulation factors following in vivo activation as well as in vitro blood coagulation tests of prothrombin time (PT, often reported as international normalized ratio (INR)) and activated partial thromboplastin time (aPTT). The model predicts the concentration-time and time-effect profiles of warfarin, heparins, and vitamin K in humans. The model can be applied to predict the time courses of coagulation kinetics in clinical situations (e.g., hemophilia) and for biomarker identification during drug development. The model developed in this study is the first quantitative description of the comprehensive coagulation network.
This model is from the article: A comprehensive model for the humoral coagulation network in humans. Wajima T, Isbister GK, Duffull SB. Clinical Pharmacology and therapeuticsVolume 86, Issue 3, 10 June 2009, EPub 19516255, Abstract: Coagulation is an important process in hemostasis and comprises a complicated interaction of multiple enzymes and proteins. We have developed a mechanistic quantitative model of the coagulation network. The model accurately describes the time courses of coagulation factors following in vivo activation as well as in vitro blood coagulation tests of prothrombin time (PT, often reported as international normalized ratio (INR)) and activated partial thromboplastin time (aPTT). The model predicts the concentration-time and time-effect profiles of warfarin, heparins, and vitamin K in humans. The model can be applied to predict the time courses of coagulation kinetics in clinical situations (e.g., hemophilia) and for biomarker identification during drug development. The model developed in this study is the first quantitative description of the comprehensive coagulation network.
This model is from the article: A comprehensive model for the humoral coagulation network in humans. Wajima T, Isbister GK, Duffull SB. Clinical Pharmacology and therapeuticsVolume 86, Issue 3, 10 June 2009, EPub 19516255, Abstract: Coagulation is an important process in hemostasis and comprises a complicated interaction of multiple enzymes and proteins. We have developed a mechanistic quantitative model of the coagulation network. The model accurately describes the time courses of coagulation factors following in vivo activation as well as in vitro blood coagulation tests of prothrombin time (PT, often reported as international normalized ratio (INR)) and activated partial thromboplastin time (aPTT). The model predicts the concentration-time and time-effect profiles of warfarin, heparins, and vitamin K in humans. The model can be applied to predict the time courses of coagulation kinetics in clinical situations (e.g., hemophilia) and for biomarker identification during drug development. The model developed in this study is the first quantitative description of the comprehensive coagulation network.
This model is from the article: A model of beta-cell mass, insulin, and glucose kinetics: pathways to diabetes. Topp B, Promislow K, deVries G, Miura RM, Finegood DT. J Theor Biol.2000 Oct 21;206(4):605-19. 11013117, Abstract: Diabetes is a disease of the glucose regulatory system that is associated with increased morbidity and early mortality. The primary variables of this system are beta-cell mass, plasma insulin concentrations, and plasma glucose concentrations. Existing mathematical models of glucose regulation incorporate only glucose and/or insulin dynamics. Here we develop a novel model of beta -cell mass, insulin, and glucose dynamics, which consists of a system of three nonlinear ordinary differential equations, where glucose and insulin dynamics are fast relative to beta-cell mass dynamics. For normal parameter values, the model has two stable fixed points (representing physiological and pathological steady states), separated on a slow manifold by a saddle point. Mild hyperglycemia leads to the growth of the beta -cell mass (negative feedback) while extreme hyperglycemia leads to the reduction of the beta-cell mass (positive feedback). The model predicts that there are three pathways in prolonged hyperglycemia: (1) the physiological fixed point can be shifted to a hyperglycemic level (regulated hyperglycemia), (2) the physiological and saddle points can be eliminated (bifurcation), and (3) progressive defects in glucose and/or insulin dynamics can drive glucose levels up at a rate faster than the adaptation of the beta -cell mass which can drive glucose levels down (dynamical hyperglycemia).
This model is from the article: Quantitative analysis of transient and sustained transforming growth factor-\u03b2 signaling dynamics. Zhike Zi, Zipei Feng, Douglas A Chapnick, Markus Dahl, Difan Deng, Edda Klipp, Aristidis Moustakas & Xuedong Liu Molecular Systems Biology 2011 May 24;7:492. 21613981 , Abstract: Mammalian cells can decode the concentration of extracellular transforming growth factor-\u03b2 (TGF-\u03b2) and transduce this cue into appropriate cell fate decisions. How variable TGF-\u03b2 ligand doses quantitatively control intracellular signaling dynamics and how continuous ligand doses are translated into discontinuous cellular fate decisions remain poorly understood. Using a combined experimental and mathematical modeling approach, we discovered that cells respond differently to continuous and pulsating TGF-\u03b2 stimulation. The TGF-\u03b2 pathway elicits a transient signaling response to a single pulse of TGF-\u03b2 stimulation, whereas it is capable of integrating repeated pulses of ligand stimulation at short time interval, resulting in sustained phospho-Smad2 and transcriptional responses. Additionally, the TGF-\u03b2 pathway displays different sensitivities to ligand doses at different time scales. While ligand-induced short-term Smad2 phosphorylation is graded, long-term Smad2 phosphorylation is switch-like to a small change in TGF-\u03b2 levels. Correspondingly, the short-term Smad7 gene expression is graded, while long-term PAI-1 gene expression is switch-like, as is the long-term growth inhibitory response. Our results suggest that long-term switch-like signaling responses in the TGF-\u03b2 pathway might be critical for cell fate determination.
Note:
Developer of the model: Zhike Zi
Reference: Zi Z. et al., Quantitative Analysis of Transient and Sustained Transforming Growth Factor-beta Signaling Dynamics, Molecular Systems Biology, 2011
1. The global parameter that set the type of stimulation
(a) for sustained TGF-beta stimulation: set stimulation_type = 1.
(b) for single pulse of TGF-beta stimulation: set stimulation_type = 2.
parameter \"single_pulse_duration\" is for the duration of stimulation, for example,
single_pulse_duration = 0.5, for 0.5 min (30 seconds) of TGF-beta stimulation.
*Note: make sure that the time course cover the time point when the event is triggered.
(c) for single pulse of TGF-beta stimulation in COPASI
change the trigger of event \"single_pulse_TGF_beta_washout\"
This model is from the article: Mass and information feedbacks through receptor endocytosis govern insulin signaling as revealed using a parameter-free modeling framework. Brannmark C, Palmer R, Glad ST, Cedersund G, Stralfors P. J Biol Chem.2010 Jun 25;285(26):20171-9. 20421297, Abstract: Insulin and other hormones control target cells through a network of signal-mediating molecules. Such networks are extremely complex due to multiple feedback loops in combination with redundancy, shared signal mediators, and cross-talk between signal pathways. We present a novel framework that integrates experimental work and mathematical modeling to quantitatively characterize the role and relation between co-existing submechanisms in complex signaling networks. The approach is independent of knowing or uniquely estimating model parameters because it only relies on (i) rejections and (ii) core predictions (uniquely identified properties in unidentifiable models). The power of our approach is demonstrated through numerous iterations between experiments, model-based data analyses, and theoretical predictions to characterize the relative role of co-existing feedbacks governing insulin signaling. We examined phosphorylation of the insulin receptor and insulin receptor substrate-1 and endocytosis of the receptor in response to various different experimental perturbations in primary human adipocytes. The analysis revealed that receptor endocytosis is necessary for two identified feedback mechanisms involving mass and information transfer, respectively. Experimental findings indicate that interfering with the feedback may substantially increase overall signaling strength, suggesting novel therapeutic targets for insulin resistance and type 2 diabetes. Because the central observations are present in other signaling networks, our results may indicate a general mechanism in hormonal control.
This model is from the article: Modelling the Role of the Hsp70/Hsp90 System in the Maintenance of Protein Homeostasis Proctor CJ, Lorimer IAJ PLoS ONE2011; 6(7): e22038. doi:10.1371/journal.pone.0022038, Abstract: Neurodegeneration is an age-related disorder which is characterised by the accumulation of aggregated protein and neuronal cell death. There are many different neurodegenerative diseases which are classified according to the specific proteins involved and the regions of the brain which are affected. Despite individual differences, there are common mechanisms at the sub-cellular level leading to loss of protein homeostasis. The two central systems in protein homeostasis are the chaperone system, which promotes correct protein folding, and the cellular proteolytic system, which degrades misfolded or damaged proteins. Since these systems and their interactions are very complex, we use mathematical modelling to aid understanding of the processes involved. The model developed in this study focuses on the role of Hsp70 (IPR00103) and Hsp90 (IPR001404) chaperones in preventing both protein aggregation and cell death. Simulations were performed under three different conditions: no stress; transient stress due to an increase in reactive oxygen species; and high stress due to sustained increases in reactive oxygen species. The model predicts that protein homeostasis can be maintained during short periods of stress. However, under long periods of stress, the chaperone system becomes overwhelmed and the probability of cell death pathways being activated increases. Simulations were also run in which cell death mediated by the JNK (P45983) and p38 (Q16539) pathways was inhibited. The model predicts that inhibiting either or both of these pathways may delay cell death but does not stop the aggregation process and that eventually cells die due to aggregated protein inhibiting proteasomal function. This problem can be overcome if the sequestration of aggregated protein into inclusion bodies is enhanced. This model predicts responses to reactive oxygen species-mediated stress that are consistent with currently available experimental data. The model can be used to assess specific interventions to reduce cell death due to impaired protein homeostasis.
Note:
Simulations were performed under three different conditions: 1) normal condition (no stress), 2) moderate stress due to an increase in reactive oxygen species (ROS) i.e. ROS levels were increased by a factor of 4 at time=4hours for a period of 1 hour (not 2 hours as mentioned in the figure 5 legend of the reference publication. This is a typo in the paper and is clarified by the author) and 3) high stress due to sustained increase in reactive oxygen species (ROS) (here ROS increases with time).
The model that corresponds to the normal condition is submitted as a main model in the BioModels Database. The other two models, that corresponds to the moderate stress conditions and high stress conditions are available in SBML format as supporting files [go to Curation tab].
Supplementary figures S3 (normal condition), S4 (moderate stress condition) and S6 (high stress condition) are reproduced here.
This model is from the article: Mathematical modeling and analysis of insulin clearance in vivo. Koschorreck M, Gilles ED. BMC Syst Biol. 2008 May 13;2:43. 18477391, Abstract: BACKGROUND:Analyzing the dynamics of insulin concentration in the blood is necessary for a comprehensive understanding of the effects of insulin in vivo. Insulin removal from the blood has been addressed in many studies. The results are highly variable with respect to insulin clearance and the relative contributions of hepatic and renal insulin degradation.RESULTS:We present a dynamic mathematical model of insulin concentration in the blood and of insulin receptor activation in hepatocytes. The model describes renal and hepatic insulin degradation, pancreatic insulin secretion and nonspecific insulin binding in the liver. Hepatic insulin receptor activation by insulin binding, receptor internalization and autophosphorylation is explicitly included in the model. We present a detailed mathematical analysis of insulin degradation and insulin clearance. Stationary model analysis shows that degradation rates, relative contributions of the different tissues to total insulin degradation and insulin clearance highly depend on the insulin concentration.CONCLUSION:This study provides a detailed dynamic model of insulin concentration in the blood and of insulin receptor activation in hepatocytes. Experimental data sets from literature are used for the model validation. We show that essential dynamic and stationary characteristics of insulin degradation are nonlinear and depend on the actual insulin concentration.
This is the original model from Richard FitzHugh, which led the famous FitzHugh\u2013Nagumo model, still used for instance in computational neurosciences. Impulses and Physiological States in Theoretical Models of Nerve Membrane FitzHugh R Biophysical Journal, 1961 July:1(6):445-466 doi:10.1016/S0006-3495(61)86902-6 , Abstract: Van der Pol's equation for a relaxation oscillator is generalized by the addition of terms to produce a pair of non-linear differential equations with either a stable singular point or a limit cycle. The resulting BVP model has two variables of state, representing excitability and refractoriness, and qualitatively resembles Bonhoeffer's theoretical model for the iron wire model of nerve. This BVP model serves as a simple representative of a class of excitable-oscillatory systems including the Hodgkin-Huxley (HH) model of the squid giant axon. The BVP phase plane can be divided into regions corresponding to the physiological states of nerve fiber (resting, active, refractory, enhanced, depressed, etc.) to form a physiological state diagram, with the help of which many physiological phenomena can be summarized. A properly chosen projection from the 4-dimensional HH phase space onto a plane produces a similar diagram which shows the underlying relationship between the two models. Impulse trains occur in the BVP and HH models for a range of constant applied currents which make the singular point representing the resting state unstable.
This model is from the article: Division of labor by dual feedback regulators controls JAK2/STAT5 signaling over broad ligand range. Bachmann J, Raue A, Schilling M, B\u00f6hm ME, Kreutz C, Kaschek D, Busch H, Gretz N, Lehmann WD, Timmer J, Klingm\u00fcller U. Mol Syst Biol. 2011 Jul 19;7:516. 21772264 , Abstract: Cellular signal transduction is governed by multiple feedback mechanisms to elicit robust cellular decisions. The specific contributions of individual feedback regulators, however, remain unclear. Based on extensive time-resolved data sets in primary erythroid progenitor cells, we established a dynamic pathway model to dissect the roles of the two transcriptional negative feedback regulators of the suppressor of cytokine signaling (SOCS) family, CIS and SOCS3, in JAK2/STAT5 signaling. Facilitated by the model, we calculated the STAT5 response for experimentally unobservable Epo concentrations and provide a quantitative link between cell survival and the integrated response of STAT5 in the nucleus. Model predictions show that the two feedbacks CIS and SOCS3 are most effective at different ligand concentration ranges due to their distinct inhibitory mechanisms. This divided function of dual feedback regulation enables control of STAT5 responses for Epo concentrations that can vary 1000-fold in vivo. Our modeling approach reveals dose-dependent feedback control as key property to regulate STAT5-mediated survival decisions over a broad range of ligand concentrations.
This a model from the article: Glucose sensing in the pancreatic beta cell: a computational systems analysis. Fridlyand LE, Philipson LH.Theor Biol Med Model.2010 May 24;7:15. 20497556, Abstract: BACKGROUND:Pancreatic beta-cells respond to rising blood glucose by increasing oxidative metabolism, leading to an increased ATP/ADP ratio in the cytoplasm. This leads to a closure of KATP channels, depolarization of the plasma membrane, influx of calcium and the eventual secretion of insulin. Such mechanism suggests that beta-cell metabolism should have a functional regulation specific to secretion, as opposed to coupling to contraction. The goal of this work is to uncover contributions of the cytoplasmic and mitochondrial processes in this secretory coupling mechanism using mathematical modeling in a systems biology approach.METHODS:We describe a mathematical model of beta-cell sensitivity to glucose. The cytoplasmic part of the model includes equations describing glucokinase, glycolysis, pyruvate reduction, NADH and ATP production and consumption. The mitochondrial part begins with production of NADH, which is regulated by pyruvate dehydrogenase. NADH is used in the electron transport chain to establish a proton motive force, driving the F1F0 ATPase. Redox shuttles and mitochondrial Ca2+ handling were also modeled.RESULTS:The model correctly predicts changes in the ATP/ADP ratio, Ca2+ and other metabolic parameters in response to changes in substrate delivery at steady-state and during cytoplasmic Ca2+ oscillations. Our analysis of the model simulations suggests that the mitochondrial membrane potential should be relatively lower in beta cells compared with other cell types to permit precise mitochondrial regulation of the cytoplasmic ATP/ADP ratio. This key difference may follow from a relative reduction in respiratory activity. The model demonstrates how activity of lactate dehydrogenase, uncoupling proteins and the redox shuttles can regulate beta-cell function in concert; that independent oscillations of cytoplasmic Ca2+ can lead to slow coupled metabolic oscillations; and that the relatively low production rate of reactive oxygen species in beta-cells under physiological conditions is a consequence of the relatively decreased mitochondrial membrane potential.CONCLUSION:This comprehensive model predicts a special role for mitochondrial control mechanisms in insulin secretion and ROS generation in the beta cell. The model can be used for testing and generating control hypotheses and will help to provide a more complete understanding of beta-cell glucose-sensing central to the physiology and pathology of pancreatic beta-cells.
This model was taken from the Vcell MathModel directory and was converted to SBML
This a model from the article: Glucose sensing in the pancreatic beta cell: a computational systems analysis. Fridlyand LE, Philipson LH.Theor Biol Med Model.2010 May 24;7:15. 20497556, Abstract: BACKGROUND:Pancreatic beta-cells respond to rising blood glucose by increasing oxidative metabolism, leading to an increased ATP/ADP ratio in the cytoplasm. This leads to a closure of KATP channels, depolarization of the plasma membrane, influx of calcium and the eventual secretion of insulin. Such mechanism suggests that beta-cell metabolism should have a functional regulation specific to secretion, as opposed to coupling to contraction. The goal of this work is to uncover contributions of the cytoplasmic and mitochondrial processes in this secretory coupling mechanism using mathematical modeling in a systems biology approach.METHODS:We describe a mathematical model of beta-cell sensitivity to glucose. The cytoplasmic part of the model includes equations describing glucokinase, glycolysis, pyruvate reduction, NADH and ATP production and consumption. The mitochondrial part begins with production of NADH, which is regulated by pyruvate dehydrogenase. NADH is used in the electron transport chain to establish a proton motive force, driving the F1F0 ATPase. Redox shuttles and mitochondrial Ca2+ handling were also modeled.RESULTS:The model correctly predicts changes in the ATP/ADP ratio, Ca2+ and other metabolic parameters in response to changes in substrate delivery at steady-state and during cytoplasmic Ca2+ oscillations. Our analysis of the model simulations suggests that the mitochondrial membrane potential should be relatively lower in beta cells compared with other cell types to permit precise mitochondrial regulation of the cytoplasmic ATP/ADP ratio. This key difference may follow from a relative reduction in respiratory activity. The model demonstrates how activity of lactate dehydrogenase, uncoupling proteins and the redox shuttles can regulate beta-cell function in concert; that independent oscillations of cytoplasmic Ca2+ can lead to slow coupled metabolic oscillations; and that the relatively low production rate of reactive oxygen species in beta-cells under physiological conditions is a consequence of the relatively decreased mitochondrial membrane potential.CONCLUSION:This comprehensive model predicts a special role for mitochondrial control mechanisms in insulin secretion and ROS generation in the beta cell. The model can be used for testing and generating control hypotheses and will help to provide a more complete understanding of beta-cell glucose-sensing central to the physiology and pathology of pancreatic beta-cells.
This model was taken from the Vcell MathModel directory and was converted to SBML
This model is from the article: Multiple light inputs to a simple clock circuit allow complex biological rhythms Troein C, Corellou F, Dixon LE, van Ooijen G, O'Neill JS, Bouget FY, Millar AJ. Plant J.2011 Apr;66(2):375-85. 21219507, Abstract: Circadian clocks are biological timekeepers that allow living cells to time their activity in anticipation of predictable environmental changes. Detailed understanding of the circadian network of higher plants, such as Arabidopsis thaliana, is hampered by the high number of partially redundant genes. However, the picoeukaryotic alga Ostreococcus tauri, which was recently shown to possess a small number of non-redundant clock genes, presents an attractive alternative target for detailed modelling of circadian clocks in the green lineage. Based on extensive time-series data from in vivo reporter gene assays, we developed a model of the Ostreococcus clock as a feedback loop between the genes TOC1 and CCA1. The model reproduces the dynamics of the transcriptional and translational reporters over a range of photoperiods. Surprisingly, the model is also able to predict the transient behaviour of the clock when the light conditions are altered. Despite the apparent simplicity of the clock circuit, it displays considerable complexity in its response to changing light conditions. Systematic screening of the effects of altered day length revealed a complex relationship between phase and photoperiod, which is also captured by the model. The complex light response is shown to stem from circadian gating of light-dependent mechanisms. This study provides insights into the contributions of light inputs to the Ostreococcus clock. The model suggests that a high number of light-dependent reactions are important for flexible timing in a circadian clock with only one feedback loop.
Note: Two-gene model of the Ostreococcus circadian clock
This is a model of the circadian clock of Ostreococcus tauri, with a negative feedback loop between TOC1 and CCA1 (a.k.a. LHY) and multiple light inputs. It was used and described in Troein et al., Plant Journal (2011).
The model incorporates luciferase reporters, and in this SBML model the four different versions of the model for transcriptional and translational reporter lines (pTOC1::LUC, pCCA1::LUC, TOC1-LUC and CCA1-LUC) are all accessible by setting one of the rep_X parameters to 1 and the others to 0. You can also set all four to 0 to only simulate the non-reporter core of the system.
Input to the system should be provided by modifying the \"light\" function. An implementation of LD 12:12 is provided as an example, but the model was also used with more complicated light regimes that vary between data sets and are not convenient to express directly in SBML.
The functions \"ox_cca1\" and \"ox_toc1\" can be altered to add overexpression of CCA1 and TOC1. Setting either to x gives additional, constitutive transcription at x times the maximal (and typically not realizable) transcription rate of the native gene. The overexpression mutant fits in Figure 7 of Troein et al. (2011) used ox_cca1 = 0.115 and oc_toc1 = 0.0584, respectively.
The functions \"copies_toc1\" and \"copies_cca1\" are normally 1 but can be lowered to simulate knockdown experiments. The functions \"transcription\", \"translation\" and \"proteasome\" can be modified to simulate the effects of altering the overall rate of transcription, translation and protein degradation.
The parameters were fitted specifically to data from transgenic reporter lines TOC8, pTOC3, LHY7 and pLHY7 (Corellou et al., Plant Cell 2009). Parameters that begin with \"effcopies\" describe the effective number of copies of CCA1 or TOC1 in the respective translational fusion lines, with anything above 1 due to the fusion proteins.
For the model fitting, the initial values were fitted to the data in the various time courses. The initial values given here correspond to the limit cycle of the system in LD 12:12. The system converges to the limit cycle in just a few days under most light conditions, so these initial values are biologically meaningful.
The species cca1luc_c and cca1luc_n have been merged into cca1luc (which corresponds to the observable luminescence signal), because Copasi refused to run the system otherwise. For TOC1-LUC, the predicted output signal is the sum of toc1luc_1 and toc1luc_2.
This model is from the article: The auxin signalling network translates dynamic input into robust patterning at the shoot apex. Vernoux T, Brunoud G, Farcot E, Morin V, Van den Daele H, Legrand J, Oliva M, Das P, Larrieu A, Wells D, Gu\u00e9don Y, Armitage L, Picard F, Guyomarc'h S, Cellier C, Parry G, Koumproglou R, Doonan JH, Estelle M, Godin C, Kepinski S, Bennett M, De Veylder L, Traas J. Mol Syst Biol. 2011 Jul 5;7:508. 21734647 , Abstract: The plant hormone auxin is thought to provide positional information for patterning during development. It is still unclear, however, precisely how auxin is distributed across tissues and how the hormone is sensed in space and time. The control of gene expression in response to auxin involves a complex network of over 50 potentially interacting transcriptional activators and repressors, the auxin response factors (ARFs) and Aux/IAAs. Here, we perform a large-scale analysis of the Aux/IAA-ARF pathway in the shoot apex of Arabidopsis, where dynamic auxin-based patterning controls organogenesis. A comprehensive expression map and full interactome uncovered an unexpectedly simple distribution and structure of this pathway in the shoot apex. A mathematical model of the Aux/IAA-ARF network predicted a strong bufferingcapacity along with spatial differences in auxin sensitivity. We then tested and confirmed these predictions using a novel auxin signalling sensor that reports input into the signalling pathway, in conjunction with the published DR5 transcriptional output reporter. Our results provide evidence that the auxin signalling network is essential to create robust patterns at the shoot apex.
Note:
Figure 3 of the supplementary material of the reference article has been reproduced here. Time evolution of all the variables in the model are plotted, under the influence of a step input of auxin level (auxin=5, when time>1000; 0.11, otherwise). pi_A is varied between 0 and 2 by steps of 0.1.
This model is from the article: The auxin signalling network translates dynamic input into robust patterning at the shoot apex. Vernoux T, Brunoud G, Farcot E, Morin V, Van den Daele H, Legrand J, Oliva M, Das P, Larrieu A, Wells D, Gu\u00e9don Y, Armitage L, Picard F, Guyomarc'h S, Cellier C, Parry G, Koumproglou R, Doonan JH, Estelle M, Godin C, Kepinski S, Bennett M, De Veylder L, Traas J. Mol Syst Biol. 2011 Jul 5;7:508. 21734647 , Abstract: The plant hormone auxin is thought to provide positional information for patterning during development. It is still unclear, however, precisely how auxin is distributed across tissues and how the hormone is sensed in space and time. The control of gene expression in response to auxin involves a complex network of over 50 potentially interacting transcriptional activators and repressors, the auxin response factors (ARFs) and Aux/IAAs. Here, we perform a large-scale analysis of the Aux/IAA-ARF pathway in the shoot apex of Arabidopsis, where dynamic auxin-based patterning controls organogenesis. A comprehensive expression map and full interactome uncovered an unexpectedly simple distribution and structure of this pathway in the shoot apex. A mathematical model of the Aux/IAA-ARF network predicted a strong buffering capacity along with spatial differences in auxin sensitivity. We then tested and confirmed these predictions using a novel auxin signalling sensor that reports input into the signalling pathway, in conjunction with the published DR5 transcriptional output reporter. Our results provide evidence that the auxin signalling network is essential to create robust patterns at the shoot apex.
Note:
Figure 4 of the supplementary material of the reference article has been reproduced here. In this model, the fluctuations of auxin level is represented using sinux function. Time evolution of the variables AUX/IAA (I) and mRNA (R) are plotted, under the influence of fluctuations of auxin level. pi_A is varied between 0 and 2 by steps of 0.1.
This model is from the article: Kinetic modeling and exploratory numerical simulation of chloroplastic starch degradation. Nag A, Lunacek M, Graf PA, Chang CH. BMC Syst Biol.2011 Jun 18;5:94. 21682905, Abstract: BACKGROUND:Higher plants and algae are able to fix atmospheric carbon dioxide through photosynthesis and store this fixed carbon in large quantities as starch, which can be hydrolyzed into sugars serving as feedstock for fermentation to biofuels and precursors. Rational engineering of carbon flow in plant cells requires a greater understanding of how starch breakdown fluxes respond to variations in enzyme concentrations, kinetic parameters, and metabolite concentrations. We have therefore developed and simulated a detailed kinetic ordinary differential equation model of the degradation pathways for starch synthesized in plants and green algae, which to our knowledge is the most complete such model reported to date.RESULTS:Simulation with 9 internal metabolites and 8 external metabolites, the concentrations of the latter fixed at reasonable biochemical values, leads to a single reference solution showing \u03b2-amylase activity to be the rate-limiting step in carbon flow from starch degradation. Additionally, the response coefficients for stromal glucose to the glucose transporter kcat and KM are substantial, whereas those for cytosolic glucose are not, consistent with a kinetic bottleneck due to transport. Response coefficient norms show stromal maltopentaose and cytosolic glucosylated arabinogalactan to be the most and least globally sensitive metabolites, respectively, and \u03b2-amylase kcat and KM for starch to be the kinetic parameters with the largest aggregate effect on metabolite concentrations as a whole. The latter kinetic parameters, together with those for glucose transport, have the greatest effect on stromal glucose, which is a precursor for biofuel synthetic pathways. Exploration of the steady-state solution space with respect to concentrations of 6 external metabolites and 8 dynamic metabolite concentrations show that stromal metabolism is strongly coupled to starch levels, and that transport between compartments serves to lower coupling between metabolic subsystems in different compartments.CONCLUSIONS:We find that in the reference steady state, starch cleavage is the most significant determinant of carbon flux, with turnover of oligosaccharides playing a secondary role. Independence of stationary point with respect to initial dynamic variable values confirms a unique stationary point in the phase space of dynamically varying concentrations of the model network. Stromal maltooligosaccharide metabolism was highly coupled to the available starch concentration. From the most highly converged trajectories, distances between unique fixed points of phase spaces show that cytosolic maltose levels depend on the total concentrations of arabinogalactan and glucose present in the cytosol. In addition, cellular compartmentalization serves to dampen much, but not all, of the effects of one subnetwork on another, such that kinetic modeling of single compartments would likely capture most dynamics that are fast on the timescale of the transport reactions.
This model is from the article: Parallel adaptive feedback enhances reliability of the Ca2+ signaling system. Abell E, Ahrends R, Bandara S, Park BO, Teruel MN. Proc Natl Acad Sci U S A. 2011 Aug 15. 21844332 , Abstract: Despite large cell-to-cell variations in the concentrations of individual signaling proteins, cells transmit signals correctly. This phenomenon raises the question of what signaling systems do to prevent a predicted high failure rate. Here we combine quantitative modeling, RNA interference, and targeted selective reaction monitoring (SRM) mass spectrometry, and we show for the ubiquitous and fundamental calcium signaling system that cells monitor cytosolic and endoplasmic reticulum (ER) Ca(2+) levels and adjust in parallel the concentrations of the store-operated Ca(2+) influx mediator stromal interaction molecule (STIM), the plasma membrane Ca(2+) pump plasma membrane Ca-ATPase (PMCA), and the ER Ca(2+) pump sarco/ER Ca(2+)-ATPase (SERCA). Model calculations show that this combined parallel regulation in protein expression levels effectively stabilizes basal cytosolic and ER Ca(2+) levels and preserves receptor signaling. Our results demonstrate that, rather than directly controlling the relative level of signaling proteins in a forward regulation strategy, cells prevent transmission failure by sensing the state of the signaling pathway and using multiple parallel adaptive feedbacks.
Note:
There are two models described in the paper to simulate basal and receptor stimulated Ca 2+ signaling. 1) No adaptive feedback (this model: MODEL1108050000) and 2) with three slow adaptive feedback loops (MODEL1108050001).
This model is from the article: Parallel adaptive feedback enhances reliability of the Ca2+ signaling system. Abell E, Ahrends R, Bandara S, Park BO, Teruel MN. Proc Natl Acad Sci U S A. 2011 Aug 15. 21844332 , Abstract: Despite large cell-to-cell variations in the concentrations of individual signaling proteins, cells transmit signals correctly. This phenomenon raises the question of what signaling systems do to prevent a predicted high failure rate. Here we combine quantitative modeling, RNA interference, and targeted selective reaction monitoring (SRM) mass spectrometry, and we show for the ubiquitous and fundamental calcium signaling system that cells monitor cytosolic and endoplasmic reticulum (ER) Ca(2+) levels and adjust in parallel the concentrations of the store-operated Ca(2+) influx mediator stromal interaction molecule (STIM), the plasma membrane Ca(2+) pump plasma membrane Ca-ATPase (PMCA), and the ER Ca(2+) pump sarco/ER Ca(2+)-ATPase (SERCA). Model calculations show that this combined parallel regulation in protein expression levels effectively stabilizes basal cytosolic and ER Ca(2+) levels and preserves receptor signaling. Our results demonstrate that, rather than directly controlling the relative level of signaling proteins in a forward regulation strategy, cells prevent transmission failure by sensing the state of the signaling pathway and using multiple parallel adaptive feedbacks.
Note:
There are two models described in the paper to simulate basal and receptor stimulated Ca 2+ signaling. 1) No adaptive feedback (MODEL1108050000) and 2) with three slow adaptive feedback loops (this model: MODEL1108050001).
This a model from the article: A Hierarchical Whole-body Modeling Approach Elucidates the Link between in Vitro Insulin Signaling and in Vivo Glucose Homeostasis. Nyman E, Brannmark C, Palmer R, Brugard J, Nystrom FH, Stralfors P, Cedersund G.J Biol Chem.2011 Jul 22;286(29):26028-41. 21572040, Abstract: Type 2 diabetes is a metabolic disease that profoundly affects energy homeostasis. The disease involves failure at several levels and subsystems and is characterized by insulin resistance in target cells and tissues (i.e. by impaired intracellular insulin signaling). We have previously used an iterative experimental-theoretical approach to unravel the early insulin signaling events in primary human adipocytes. That study, like most insulin signaling studies, is based on in vitro experimental examination of cells, and the in vivo relevance of such studies for human beings has not been systematically examined. Herein, we develop a hierarchical model of the adipose tissue, which links intracellular insulin control of glucose transport in human primary adipocytes with whole-body glucose homeostasis. An iterative approach between experiments and minimal modeling allowed us to conclude that it is not possible to scale up the experimentally determined glucose uptake by the isolated adipocytes to match the glucose uptake profile of the adipose tissue in vivo. However, a model that additionally includes insulin effects on blood flow in the adipose tissue and GLUT4 translocation due to cell handling can explain all data, but neither of these additions is sufficient independently. We also extend the minimal model to include hierarchical dynamic links to more detailed models (both to our own models and to those by others), which act as submodules that can be turned on or off. The resulting multilevel hierarchical model can merge detailed results on different subsystems into a coherent understanding of whole-body glucose homeostasis. This hierarchical modeling can potentially create bridges between other experimental model systems and the in vivo human situation and offers a framework for systematic evaluation of the physiological relevance of in vitro obtained molecular/cellular experimental data.
CWI. Modelling, Analysis and Simulation, No. R 9720, p.1-11.
Abstract:
This paper describes the mathematical modelling of a part of the blood coagulation mechanism. The model includes the activation of factor X by a purified enzyme from Russel's Viper Venom (RVV), factor V and prothrombin, and also comprises the inactivation of the products formed. In this study we assume that in principle the mechanism of the process is known. However, the exact structure of the mechanism is unknown, and the process still can be described by different mathematical models. These models are put to test by measuring their capacity to explain the course of thrombin generation as observed in plasma after recalcification in presence of RVV. The mechanism studied is mathematically modelled as a system of differential-algebraic equations (DAEs). Each candidate model contains some freedom, which is expressed in the model equations by the presence of unknown parameters. For example, reaction constants or initial concentrations are unknown. The goal of parameter estimation is to determine these unknown parameters in such a way that the theoretical (i.e., computed) results fit the experimental data within measurement accuracy and to judge which modifications of the chemical reaction scheme allow the best fit. We present results on model discrimination and estimation of reaction constants, which are hard to obtain in another way.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
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- "summary": "Matthew F. Hockin, Kevin M. Cawthern, Michael Kalafatis & Kenneth G. Mann. A model describing the inactivation of factor Va by APC: bond cleavage, fragment dissociation, and product inhibition. Biochemistry 38, 21 (1999).The inactivation of factor Va is a complex process which includes bond cleavage (at three sites) and dissociation of the A2N.A2C peptides, with intermediate activity in each species. Quantitation of the functional consequences of each step in the reaction has allowed for understanding of the presentation of disease in individuals possessing the factor V polymorphism factor VLEIDEN. APC cleavage of membrane-bound bovine factor Va (Arg306, Arg505, Arg662) leads to the dissociation of fragments of the A2 domain, residues 307-713 (A2N.A2C + A2C-peptide), leaving behind the membrane-bound A1.LC species. Evaluation of the dissociation process by light scattering yields invariant mass loss estimates as a function of APC concentration. The rate constant for A2 fragment dissociation varies with [APC], reaching a maximal value of k = 0.028 s-1, the unimolecular rate constant for A2 domain fragment dissociation. The APC binding site resides in the factor Va light chain (LC) (Kd = 7 nM), suggesting that the membrane-bound LC.A1 product would act to sequester APC. This inhibitory interaction (LC.A1.APC) is demonstrated to exist with either purified factor Va LC or the products of factor Va inactivation. Utilizing these experimental data and the reported rates of bond cleavage, binding constants, and product activity values for factor Va partial inactivation products, a model is developed which describes factor Va inactivation and accounts for the defect in factor VLEIDEN. The model accurately predicts the rates of inactivation of factor Va and factor VaLEIDEN, and the effect of product inhibition. Modeled reaction progress diagrams and activity profiles (from either factor Va or factor VaLEIDEN) are coincident with experimentally derived data, providing a mechanistic and kinetic explanation for all steps in the inactivation of normal factor Va and the pathology associated with factor VLEIDEN.",
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This model is from the article: Computational modelling of mitotic exit in budding yeast: the role of separase and Cdc14 endocycles Vinod PK, Freire P, Rattani A, Ciliberto A, Uhlmann F, Novak B. J R Soc Interface. 2011 Aug 7;8(61):1128-41. Epub 2011 Feb 2. 21288956 , Abstract: The operating principles of complex regulatory networks are best understood with the help of mathematical modelling rather than by intuitive reasoning. Hereby, we study the dynamics of the mitotic exit (ME) control system in budding yeast by further developing the Queralt's model. A comprehensive systems view of the network regulating ME is provided based on classical experiments in the literature. In this picture, Cdc20-APC is a critical node controlling both cyclin (Clb2 and Clb5) and phosphatase (Cdc14) branches of the regulatory network. On the basis of experimental situations ranging from single to quintuple mutants, the kinetic parameters of the network are estimated. Numerical analysis of the model quantifies the dependence of ME control on the proteolytic and non-proteolytic functions of separase. We show that the requirement of the non-proteolytic function of separase for ME depends on cyclin-dependent kinase activity. The model is also used for the systematic analysis of the recently discovered Cdc14 endocycles. The significance of Cdc14 endocycles in eukaryotic cell cycle control is discussed as well.
This a model from the article: Channel sharing in pancreatic beta -cells revisited: enhancement of emergentbursting by noise. De Vries G, Sherman A. J Theor Biol2000 Dec 21;207(4):513-30 11093836, Abstract: Secretion of insulin by electrically coupled populations of pancreatic beta-cells is governed by bursting electrical activity. Isolated beta -cells,however, exhibit atypical bursting or continuous spike activity. We studybursting as an emergent property of the population, focussing on interactionsamong the subclass of spiking cells. These are modelled by equipping the fastsubsystem with a saddle-node-loop bifurcation, which makes it monostable. Suchcells can only spike tonically or remain silent when isolated, but can beinduced to burst with weak diffusive coupling. With stronger coupling, the cellsrevert to tonic spiking. We demonstrate that the addition of noise dramaticallyincreases, via a phenomenon like stochastic resonance, the coupling range overwhich bursting is seen. Copyright 2000 Academic Press.
This a model from the article: Modeling the insulin-glucose feedback system: the significance of pulsatileinsulin secretion. Tolic IM, Mosekilde E, Sturis J. J Theor Biol2000 Dec 7;207(3):361-75 11082306, Abstract: A mathematical model of the insulin-glucose feedback regulation in man is usedto examine the effects of an oscillatory supply of insulin compared to aconstant supply at the same average rate. We show that interactions between theoscillatory insulin supply and the receptor dynamics can be of minutesignificance only. It is possible, however, to interpret seemingly conflictingresults of clinical studies in terms of their different experimental conditionswith respect to the hepatic glucose release. If this release is operating nearan upper limit, an oscillatory insulin supply will be more efficient in loweringthe blood glucose level than a constant supply. If the insulin level is highenough for the hepatic release of glucose to nearly vanish, the opposite effectis observed. For insulin concentrations close to the point of inflection of theinsulin-glucose dose-response curve an oscillatory and a constant insulininfusion produce similar effects. Copyright 2000 Academic Press.
This a model from the article: Calcium and glycolysis mediate multiple bursting modes in pancreatic islets. Bertram R, Satin L, Zhang M, Smolen P, Sherman A. Biophys J2004 Nov;87(5):3074-87 15347584, Abstract: Pancreatic islets of Langerhans produce bursts of electrical activity whenexposed to stimulatory glucose levels. These bursts often have a regularrepeating pattern, with a period of 10-60 s. In some cases, however, the burstsare episodic, clustered into bursts of bursts, which we call compound bursting.Consistent with this are recordings of free Ca2+ concentration, oxygenconsumption, mitochondrial membrane potential, and intraislet glucose levelsthat exhibit very slow oscillations, with faster oscillations superimposed. Wedescribe a new mathematical model of the pancreatic beta-cell that can accountfor these multimodal patterns. The model includes the feedback of cytosolic Ca2+onto ion channels that can account for bursting, and a metabolic subsystem thatis capable of producing slow oscillations driven by oscillations in glycolysis.This slow rhythm is responsible for the slow mode of compound bursting in themodel. We also show that it is possible for glycolytic oscillations alone todrive a very slow form of bursting, which we call \"glycolytic bursting.\"Finally, the model predicts that there is bistability between stationary andoscillatory glycolysis for a range of parameter values. We provide experimentalsupport for this model prediction. Overall, the model can account for adiversity of islet behaviors described in the literature over the past 20 years.
This a model from the article: A role for calcium release-activated current (CRAC) in cholinergic modulation ofelectrical activity in pancreatic beta-cells. Bertram R, Smolen P, Sherman A, Mears D, Atwater I, Martin F, Soria B. Biophys J1995 Jun;68(6):2323-32 7647236, Abstract: S. Bordin and colleagues have proposed that the depolarizing effects ofacetylcholine and other muscarinic agonists on pancreatic beta-cells aremediated by a calcium release-activated current (CRAC). We support thishypothesis with additional data, and present a theoretical model which accountsfor most known data on muscarinic effects. Additional phenomena, such as thebiphasic responses of beta-cells to changes in glucose concentration and thedepolarizing effects of the sarco-endoplasmic reticulum calcium ATPase pumppoison thapsigargin, are also accounted for by our model. The ability of thissingle hypothesis, that CRAC is present in beta-cells, to explain so manyphenomena motivates a more complete characterization of this current.
This a model from the article: Evidence that calcium release-activated current mediates the biphasic electricalactivity of mouse pancreatic beta-cells. Mears D, Sheppard NF Jr, Atwater I, Rojas E, Bertram R, Sherman A. J Membr Biol1997 Jan 1;155(1):47-59 9002424, Abstract: The electrical response of pancreatic beta-cells to step increases in glucoseconcentration is biphasic, consisting of a prolonged depolarization with actionpotentials (Phase 1) followed by membrane potential oscillations known asbursts. We have proposed that the Phase 1 response results from the combineddepolarizing influences of potassium channel closure and an inward, nonselectivecation current (ICRAN) that activates as intracellular calcium stores emptyduring exposure to basal glucose (Bertram et al., 1995). The stores refillduring Phase 1, deactivating ICRAN and allowing steady-state bursting tocommence. We support this hypothesis with additional simulations andexperimental results indicating that Phase 1 duration is sensitive to thefilling state of intracellular calcium stores. First, the duration of the Phase1 transient increases with duration of prior exposure to basal (2.8 mM) glucose,reflecting the increased time required to fill calcium stores that have beenemptying for longer periods. Second, Phase 1 duration is reduced when islets areexposed to elevated K+ to refill calcium stores in the presence of basalglucose. Third, when extracellular calcium is removed during the basal glucoseexposure to reduce calcium influx into the stores, Phase 1 duration increases.Finally, no Phase 1 is observed following hyperpolarization of the beta-cellmembrane with diazoxide in the continued presence of 11 mm glucose, a conditionin which intracellular calcium stores remain full. Application of carbachol toempty calcium stores during basal glucose exposure did not increase Phase 1duration as the model predicts. Despite this discrepancy, the good agreementbetween most of the experimental results and the model predictions providesevidence that a calcium release-activated current mediates the Phase 1electrical response of the pancreatic beta-cell.
This is the model described in the article: Interaction of glycolysis and mitochondrial respiration in metabolic oscillations of pancreatic islets. Bertram R, Satin LS, Pedersen MG, Luciani DS, Sherman A. Biophys J. 2007 Mar 1;92(5):1544-55. Pubmed ID: 17172305, doi: 10.1529/biophysj.106.097154. Abstract: Insulin secretion from pancreatic beta-cells is oscillatory, with a typical period of 2-7 min, reflecting oscillations in membrane potential and the cytosolic Ca(2+) concentration. Our central hypothesis is that the slow 2-7 min oscillations are due to glycolytic oscillations, whereas faster oscillations that are superimposed are due to Ca(2+) feedback onto metabolism or ion channels. We extend a previous mathematical model based on this hypothesis to include a more detailed description of mitochondrial metabolism. We demonstrate that this model can account for typical oscillatory patterns of membrane potential and Ca(2+) concentration in islets. It also accounts for temporal data on oxygen consumption in islets. A recent challenge to the notion that glycolytic oscillations drive slow Ca(2+) oscillations in islets are data showing that oscillations in Ca(2+), mitochondrial oxygen consumption, and NAD(P)H levels are all terminated by membrane hyperpolarization. We demonstrate that these data are in fact compatible with a model in which glycolytic oscillations are the key player in rhythmic islet activity. Finally, we use the model to address the recent finding that the activity of islets from some mice is uniformly fast, whereas that from islets of other mice is slow. We propose a mechanism for this dichotomy.
This model was taken from the CellML repository and automatically converted to SBML. The original model was: Bertram, Satin, Pedersen, Luciani, Sherman, 2007 version 02 The original CellML model was created and curated by: Catherine May Lloyd c.lloyd(at)auckland.ac.nz The University of Auckland, Bioengineering Institute
This a model from the article: The phantom burster model for pancreatic beta-cells. Bertram R, Previte J, Sherman A, Kinard TA, Satin LS. Biophys J2000 Dec;79(6):2880-92 11106596, Abstract: Pancreatic beta-cells exhibit bursting oscillations with a wide range ofperiods. Whereas periods in isolated cells are generally either a few seconds ora few minutes, in intact islets of Langerhans they are intermediate (10-60 s).We develop a mathematical model for beta-cell electrical activity capable ofgenerating this wide range of bursting oscillations. Unlike previous models,bursting is driven by the interaction of two slow processes, one with arelatively small time constant (1-5 s) and the other with a much larger timeconstant (1-2 min). Bursting on the intermediate time scale is generated withoutneed for a slow process having an intermediate time constant, hence phantombursting. The model suggests that isolated cells exhibiting a fast pattern maynonetheless possess slower processes that can be brought out by injectingsuitable exogenous currents. Guided by this, we devise an experimental protocolusing the dynamic clamp technique that reliably elicits islet-like, mediumperiod oscillations from isolated cells. Finally, we show that strong electricalcoupling between a fast burster and a slow burster can produce synchronizedmedium bursting, suggesting that islets may be composed of cells that areintrinsically either fast or slow, with few or none that are intrinsicallymedium.
This a model from the article: Effects of extracellular calcium on electrical bursting and intracellular and luminal calcium oscillations in insulin secreting pancreatic beta-cells. Chay TR Biophys J.1997 Sep;73(3):1673-88. 9284334, Abstract: The extracellular calcium concentration has interesting effects on bursting of pancreatic beta-cells. The mechanism underlying the extracellular Ca2+ effect is not well understood. By incorporating a low-threshold transient inward current to the store-operated bursting model of Chay, this paper elucidates the role of the extracellular Ca2+ concentration in influencing electrical activity, intracellular Ca2+ concentration, and the luminal Ca2+ concentration in the intracellular Ca2+ store. The possibility that this inward current is a carbachol-sensitive and TTX-insensitive Na+ current discovered by others is discussed. In addition, this paper explains how these three variables respond when various pharmacological agents are applied to the store-operated model.
This model was taken from the CellML repository and automatically converted to SBML. The original model was: Chay TR (1997) - version05 The original CellML model was created by: Lloyd, Catherine, May c.lloyd@aukland.ac.nz The University of Auckland The Bioengineering Institute
This a model from the article: Meal simulation model of the glucose-insulin system. Dalla Man C, Rizza RA, Cobelli C.IEEE Trans Biomed Eng.2007 Oct;54(10):1740-9. 17926672, Abstract: A simulation model of the glucose-insulin system in the postprandial state can be useful in several circumstances, including testing of glucose sensors, insulin infusion algorithms and decision support systems for diabetes. Here, we present a new simulation model in normal humans that describes the physiological events that occur after a meal, by employing the quantitative knowledge that has become available in recent years. Model parameters were set to fit the mean data of a large normal subject database that underwent a triple tracer meal protocol which provided quasi-model-independent estimates of major glucose and insulin fluxes, e.g., meal rate of appearance, endogenous glucose production, utilization of glucose, insulin secretion. By decomposing the system into subsystems, we have developed parametric models of each subsystem by using a forcing function strategy. Model results are shown in describing both a single meal and normal daily life (breakfast, lunch, dinner) in normal. The same strategy is also applied on a smaller database for extending the model to type 2 diabetes
This model is from the article: Building a Kinetic Model of Trehalose Biosynthesis in Saccharomyces cerevisiae. Smallbone K, Malys N, Messiha HL, Wishart JA, Simeonidis E. Methods Enzymol. 2011;500:355-70. 21943906 , Abstract: In this chapter, we describe the steps needed to create a kinetic model of a metabolic pathway based on kinetic data from experimental measurements and literature review. Our methodology is presented by utilizing the example of trehalose metabolism in yeast. The biology of the trehalose cycle is briefly reviewed and discussed.
This SBML model is made available under the Creative Commons Attribution-Share Alike 3.0 Unported Licence (see www.creativecommons.org ).
This a model from the article: Modelling the onset of Type 1 diabetes: can impaired macrophage phagocytosis make the difference between health and disease? Maree AF, Kublik R, Finegood DT, Edelstein-Keshet L.Philos Transact A Math Phys Eng Sci.2006 May 15;364(1842):1267-82. 16608707, Abstract: A wave of apoptosis (programmed cell death) occurs normally in pancreatic beta-cells of newborn mice. We previously showed that macrophages from non-obese diabetic (NOD) mice become activated more slowly and engulf apoptotic cells at a lower rate than macrophages from control (Balb/c) mice. It has been hypothesized that this low clearance could result in secondary necrosis, escalating inflammation and self-antigen presentation that later triggers autoimmune, Type 1 diabetes (T1D). We here investigate whether this hypothesis could offer a reasonable and parsimonious explanation for onset of T1D in NOD mice. We quantify variants of the Copenhagen model (Freiesleben De Blasio et al. 1999 Diabetes 48, 1677), based on parameters from NOD and Balb/c experimental data. We show that the original Copenhagen model fails to explain observed phenomena within a reasonable range of parameter values, predicting an unrealistic all-or-none disease occurrence for both strains. However, if we take into account that, in general, activated macrophages produce harmful cytokines only when engulfing necrotic (but not apoptotic) cells, then the revised model becomes qualitatively and quantitatively reasonable. Further, we show that known differences between NOD and Balb/c mouse macrophage kinetics are large enough to account for the fact that an apoptotic wave can trigger escalating inflammatory response in NOD, but not Balb/c mice. In Balb/c mice, macrophages clear the apoptotic wave so efficiently, that chronic inflammation is prevented.
\t This a model from the article:\t Computer model for mechanisms underlying ultradian oscillations of insulin and glucose.\t \t Sturis J, Polonsky KS, Mosekilde E, Van Cauter E.\t Am J Physiol.1991 May;260(5 Pt 1):E801-9.\t 2035636,\t Abstract: Oscillations in human insulin secretion have been observed in two distinct period ranges, 10-15 min (i.e. rapid) and 100-150 min (i.e., ultradian). The cause of the ultradian oscillations remains to be elucidated. To determine whether the oscillations could result from the feedback loops between insulin and glucose, a parsimonious mathematical model including the major mechanisms involved in glucose regulation was developed. This model comprises two major negative feedback loops describing the effects of insulin on glucose utilization and glucose production, respectively, and both loops include the stimulatory effect of glucose on insulin secretion. Model formulations and parameters are representative of results from published clinical investigations. The occurrence of sustained insulin and glucose oscillations was found to be dependent on two essential features: 1) a time delay of 30-45 min for the effect of insulin on glucose production and 2) a sluggish effect of insulin on glucose utilization, because insulin acts from a compartment remote from plasma. When these characteristics were incorporated in the model, numerical simulations mimicked all experimental findings so far observed for these ultradian oscillations, including 1) self-sustained oscillations during constant glucose infusion at various rates; 2) damped oscillations after meal or oral glucose ingestion; 3) increased amplitude of oscillation after increased stimulation of insulin secretion, without change in frequency; and 4) slight advance of the glucose oscillation compared with the insulin oscillation.(ABSTRACT TRUNCATED AT 250 WORDS)
This model is from the article: A quantitative comparison of Calvin\u2013Benson cycle models Anne Arnold, Zoran Nikoloski Trends in Plant Science 2011 Oct 14. 22001849 , Abstract: The Calvin-Benson cycle (CBC) provides the precursors for biomass synthesis necessary for plant growth. The dynamic behavior and yield of the CBC depend on the environmental conditions and regulation of the cellular state. Accurate quantitative models hold the promise of identifying the key determinants of the tightly regulated CBC function and their effects on the responses in future climates. We provide an integrative analysis of the largest compendium of existing models for photosynthetic processes. Based on the proposed ranking, our framework facilitates the discovery of best-performing models with regard to metabolomics data and of candidates for metabolic engineering.
Note: Model of the Calvin cycle with focus on the RuBisCO reaction by Farquhar et al. (1980, DOI:10.1007/BF00386231 ).
The initial metabolite values are chosen from the data set of Zhu et al. (2007, DOI:10.1104/pp.107.103713 ). A detailed description of all modifications is given in the model described by Arnold and Nikoloski (2011, PMID:22001849 . ",
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This model is from the article: A quantitative comparison of Calvin\u2013Benson cycle models Anne Arnold, Zoran Nikoloski Trends in Plant Science 2011 Oct 14. 22001849 , Abstract: The Calvin-Benson cycle (CBC) provides the precursors for biomass synthesis necessary for plant growth. The dynamic behavior and yield of the CBC depend on the environmental conditions and regulation of the cellular state. Accurate quantitative models hold the promise of identifying the key determinants of the tightly regulated CBC function and their effects on the responses in future climates. We provide an integrative analysis of the largest compendium of existing models for photosynthetic processes. Based on the proposed ranking, our framework facilitates the discovery of best-performing models with regard to metabolomics data and of candidates for metabolic engineering.
The parameter values are widely taken from Farquhar et al. (1980, DOI:10.1007/BF00386231 ). The initial metabolite values are chosen from the data set of Zhu et al. (2007, DOI:10.1104/pp.107.103713) . A detailed description of all modifications is given in the model described by Arnold and Nikoloski (2011, PMID:22001849 . ",
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This model is from the article: A quantitative comparison of Calvin\u2013Benson cycle models Anne Arnold, Zoran Nikoloski Trends in Plant Science 2011 Oct 14. 22001849 , Abstract: The Calvin-Benson cycle (CBC) provides the precursors for biomass synthesis necessary for plant growth. The dynamic behavior and yield of the CBC depend on the environmental conditions and regulation of the cellular state. Accurate quantitative models hold the promise of identifying the key determinants of the tightly regulated CBC function and their effects on the responses in future climates. We provide an integrative analysis of the largest compendium of existing models for photosynthetic processes. Based on the proposed ranking, our framework facilitates the discovery of best-performing models with regard to metabolomics data and of candidates for metabolic engineering.
Note: Model of the Calvin cycle with focus on the RuBisCO reaction by Schultz (2003, DOI:10.1071/FP02146 ).
The parameter values are partly taken from Farquhar et al. (1980, DOI:10.1007/BF00386231 ) and Medlyn et al. (2002, DOI:10.1046/j.1365-3040.2002.00891.x ). The initial metabolite values are chosen from the data set of Zhu et al. (2007, DOI:10.1104/pp.107.103713 ). A detailed description of all modifications is given in the model described by Arnold and Nikoloski (2011, PMID:22001849 . ",
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This model is from the article: A quantitative comparison of Calvin\u2013Benson cycle models Anne Arnold, Zoran Nikoloski Trends in Plant Science 2011 Oct 14. 22001849 , Abstract: The Calvin-Benson cycle (CBC) provides the precursors for biomass synthesis necessary for plant growth. The dynamic behavior and yield of the CBC depend on the environmental conditions and regulation of the cellular state. Accurate quantitative models hold the promise of identifying the key determinants of the tightly regulated CBC function and their effects on the responses in future climates. We provide an integrative analysis of the largest compendium of existing models for photosynthetic processes. Based on the proposed ranking, our framework facilitates the discovery of best-performing models with regard to metabolomics data and of candidates for metabolic engineering.
The parameter values are partly taken from Farquhar et al. (1980, DOI:10.1007/BF00386231 ) and Medlyn et al. (2002, DOI:10.1046/j.1365-3040.2002.00891.x ). The initial metabolite values are chosen from the data set of Zhu et al. (2007, DOI:10.1104/pp.107.103713 ). A detailed description of all modifications is given in the model described by Arnold and Nikoloski (2011, PMID:22001849 . ",
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This model is from the article: A quantitative comparison of Calvin\u2013Benson cycle models Anne Arnold, Zoran Nikoloski Trends in Plant Science 2011 Oct 14. 22001849 , Abstract: The Calvin-Benson cycle (CBC) provides the precursors for biomass synthesis necessary for plant growth. The dynamic behavior and yield of the CBC depend on the environmental conditions and regulation of the cellular state. Accurate quantitative models hold the promise of identifying the key determinants of the tightly regulated CBC function and their effects on the responses in future climates. We provide an integrative analysis of the largest compendium of existing models for photosynthetic processes. Based on the proposed ranking, our framework facilitates the discovery of best-performing models with regard to metabolomics data and of candidates for metabolic engineering.
Note: Model of the Calvin cycle with focus on the RuBisCO reaction by Damour and Urban (2007, [for PDF click here] ).
The parameter values are partly taken from Farquhar et al. (1980, DOI:10.1007/BF00386231 ) and Urban et al. (2003, DOI:10.1093/treephys/23.5.289 ). The initial metabolite values are chosen from the data set of Zhu et al. (2007, DOI:10.1104/pp.107.103713 ). A detailed description of all modifications is given in the model described by Arnold and Nikoloski (2011, PMID:22001849 . ",
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This model is from the article: A quantitative comparison of Calvin\u2013Benson cycle models Anne Arnold, Zoran Nikoloski Trends in Plant Science 2011 Oct 14. 22001849 , Abstract: The Calvin-Benson cycle (CBC) provides the precursors for biomass synthesis necessary for plant growth. The dynamic behavior and yield of the CBC depend on the environmental conditions and regulation of the cellular state. Accurate quantitative models hold the promise of identifying the key determinants of the tightly regulated CBC function and their effects on the responses in future climates. We provide an integrative analysis of the largest compendium of existing models for photosynthetic processes. Based on the proposed ranking, our framework facilitates the discovery of best-performing models with regard to metabolomics data and of candidates for metabolic engineering.
The initial metabolite values are chosen from the data set of Zhu et al. (2007, DOI:10.1104/pp.107.103713 ).A detailed description of all modifications is given in the model described by Arnold and Nikoloski (2011, PMID:22001849 . ",
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This model is from the article: A quantitative comparison of Calvin\u2013Benson cycle models Anne Arnold, Zoran Nikoloski Trends in Plant Science 2011 Oct 14. 22001849 , Abstract: The Calvin-Benson cycle (CBC) provides the precursors for biomass synthesis necessary for plant growth. The dynamic behavior and yield of the CBC depend on the environmental conditions and regulation of the cellular state. Accurate quantitative models hold the promise of identifying the key determinants of the tightly regulated CBC function and their effects on the responses in future climates. We provide an integrative analysis of the largest compendium of existing models for photosynthetic processes. Based on the proposed ranking, our framework facilitates the discovery of best-performing models with regard to metabolomics data and of candidates for metabolic engineering.
Note: Model of the Calvin cycle and the related end-product pathways to starch and sucrose synthesis by Hahn (1986, [click here for abstract] ).
The parameter values are taken from Hahn (1984, [click here for abstract] ). The initial metabolite values are chosen from the data set of Zhu et al. (2007, DOI:10.1104/pp.107.103713 ). A detailed description of all modifications is given in the model described by Arnold and Nikoloski (2011, PMID:22001849 . ",
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This model is from the article: A quantitative comparison of Calvin\u2013Benson cycle models Anne Arnold, Zoran Nikoloski Trends in Plant Science2011 Oct 14. 22001849, Abstract: The Calvin-Benson cycle (CBC) provides the precursors for biomass synthesis necessary for plant growth. The dynamic behavior and yield of the CBC depend on the environmental conditions and regulation of the cellular state. Accurate quantitative models hold the promise of identifying the key determinants of the tightly regulated CBC function and their effects on the responses in future climates. We provide an integrative analysis of the largest compendium of existing models for photosynthetic processes. Based on the proposed ranking, our framework facilitates the discovery of best-performing models with regard to metabolomics data and of candidates for metabolic engineering.
The parameter values are taken from Figure 4 and 5. The initial metabolite values are chosen from the data set of Zhu et al. (2007, DOI:10.1104/pp.107.103713). A detailed description of all modifications is given in the model described by Arnold and Nikoloski (2011, PMID:22001849.
This model is from the article: A quantitative comparison of Calvin\u2013Benson cycle models Anne Arnold, Zoran Nikoloski Trends in Plant Science2011 Oct 14. 22001849, Abstract: The Calvin-Benson cycle (CBC) provides the precursors for biomass synthesis necessary for plant growth. The dynamic behavior and yield of the CBC depend on the environmental conditions and regulation of the cellular state. Accurate quantitative models hold the promise of identifying the key determinants of the tightly regulated CBC function and their effects on the responses in future climates. We provide an integrative analysis of the largest compendium of existing models for photosynthetic processes. Based on the proposed ranking, our framework facilitates the discovery of best-performing models with regard to metabolomics data and of candidates for metabolic engineering.
Note: Model of the Calvin cycle and the related end-product pathway to starch synthesis by Poolman et al. (2000, DOI:10.1093/jexbot/51.suppl_1.319).
The parameter values are widely taken from Pettersson and Ryde-Pettersson (1988, DOI:10.1111/j.1432-1033.1988.tb14242.x) and Poolman (1999, [click here for PDF]). The initial metabolite values are chosen from the data set of Zhu et al. (2007, DOI:10.1104/pp.107.103713). A detailed description of all modifications is given in the model described by Arnold and Nikoloski (2011, PMID:22001849. ",
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This model is from the article: A quantitative comparison of Calvin\u2013Benson cycle models Anne Arnold, Zoran Nikoloski Trends in Plant Science2011 Oct 14. 22001849, Abstract: The Calvin-Benson cycle (CBC) provides the precursors for biomass synthesis necessary for plant growth. The dynamic behavior and yield of the CBC depend on the environmental conditions and regulation of the cellular state. Accurate quantitative models hold the promise of identifying the key determinants of the tightly regulated CBC function and their effects on the responses in future climates. We provide an integrative analysis of the largest compendium of existing models for photosynthetic processes. Based on the proposed ranking, our framework facilitates the discovery of best-performing models with regard to metabolomics data and of candidates for metabolic engineering.
Note: Model of the Calvin cycle and the related end-product pathways to starch and sucrose synthesis by Laisk et al. (2006, DOI:10.1007/s11120-006-9109-1) and the personally provided implementation to Laisk et al. (2009, DOI:10.1007/978-1-4020-9237-4_13).
A reduced version of the published model is implemented (light-dependent reactions are taken out). The parameter values are widely taken from Laisk et al. (1989, [click here for PDF]). The initial metabolite values are chosen from the data set of Zhu et al. (2007, DOI:10.1104/pp.107.103713). A detailed description of all modifications is given in the model described by Arnold and Nikoloski (2011, PMID:22001849. ",
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This model is from the article: A quantitative comparison of Calvin\u2013Benson cycle models Anne Arnold, Zoran Nikoloski Trends in Plant Science2011 Oct 14. 22001849, Abstract: The Calvin-Benson cycle (CBC) provides the precursors for biomass synthesis necessary for plant growth. The dynamic behavior and yield of the CBC depend on the environmental conditions and regulation of the cellular state. Accurate quantitative models hold the promise of identifying the key determinants of the tightly regulated CBC function and their effects on the responses in future climates. We provide an integrative analysis of the largest compendium of existing models for photosynthetic processes. Based on the proposed ranking, our framework facilitates the discovery of best-performing models with regard to metabolomics data and of candidates for metabolic engineering.
Note: Model of the Calvin cycle and the related end-product pathways to starch and sucrose synthesis and photorespiration by Zhu et al. (2007, DOI:10.1104/pp.107.103713) and the personally provided implementation.
The parameter values are partly taken from Pettersson and Ryde-Pettersson (1988, DOI:10.1111/j.1432-1033.1988.tb14242.x). The initial metabolite values are chosen from the data set of Zhu et al. (2007, DOI:10.1104/pp.107.103713). A detailed description of all modifications is given in the model described by Arnold and Nikoloski (2011, PMID:22001849. ",
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- "name": "Sivakumar2011 - EGF Receptor Signaling Pathway",
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EGFR belongs to the human epidermal receptor (HER) family of receptor tyrosine kinases, which consists of four closely related receptors (EGFR (HER1, erbB1), HER2 (neu, erbB2), HER3 (erbB3), and HER4 (erbB4)) that mediate cellular signaling pathways involved in growth and proliferation in response to the binding of a variety of growth factor ligands. There are currently six known endogenous ligands for EGFR: EGF, transforming growth factor- (TGF-), amphiregulin, betacellulin, heparin-binding EGF (HB-EGF), and epiregulin.Upon ligand binding, the EGFR forms homo- or heterodimeric complexes (usually with HER2), which leads to activation of the receptor tyrosine kinase, via autophosphorylation.
Sivakumar KC, Dhanesh SB, Shobana S, James J, Mundayoor S.
\t
Omics: a Journal of Integrative Biology. 2011; 15(10):729-737
\t
Abstract:
\t
\t
The Notch, Sonic Hedgehog (Shh), Wnt, and EGF pathways have long been known to influence cell fate specification in the developing nervous system. Here we attempted to evaluate the contemporary knowledge about neural stem cell differentiation promoted by various drug-based regulations through a systems biology approach. Our model showed the phenomenon of DAPT-mediated antagonism of Enhancer of split [E(spl)] genes and enhancement of Shh target genes by a SAG agonist that were effectively demonstrated computationally and were consistent with experimental studies. However, in the case of model simulation of Wnt and EGF pathways, the model network did not supply any concurrent results with experimental data despite the fact that drugs were added at the appropriate positions. This paves insight into the potential of crosstalks between pathways considered in our study. Therefore, we manually developed a map of signaling crosstalk, which included the species connected by representatives from Notch, Shh, Wnt, and EGF pathways and highlighted the regulation of a single target gene, Hes-1, based on drug-induced simulations. These simulations provided results that matched with experimental studies. Therefore, these signaling crosstalk models complement as a tool toward the discovery of novel regulatory processes involved in neural stem cell maintenance, proliferation, and differentiation during mammalian central nervous system development. To our knowledge, this is the first report of a simple crosstalk map that highlights the differential regulation of neural stem cell differentiation and underscores the flow of positive and negative regulatory signals modulated by drugs.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
This is the current model for the Hedgehog signaling pathway. The best data for mechanism of signaling has been worked out in Drosophila, so this model is based largely on Drosophila data. Hedgehog target genes vary from tissue to tissue, so the identities of individual target genes have not been listed. The main difference between the Drosophila and mammalian Hedgehog signaling pathways is the fact that there are three mammalian homologs of Cubitus interruptus, Gli1 Gli2 and Gli3. Some or all of the mammalian homologs may be proteolytically processed, but the data are controversial. There are two mammalian Ptc genes and three mammalian Hedgehog genes as well. The pathway for Sonic Hedgehog appears to be most similar to the Drosophila hedgehog pathway.
Sivakumar KC, Dhanesh SB, Shobana S, James J, Mundayoor S.
\t
Omics: a Journal of Integrative Biology. 2011; 15(10):729-737
\t
Abstract:
\t
\t
The Notch, Sonic Hedgehog (Shh), Wnt, and EGF pathways have long been known to influence cell fate specification in the developing nervous system. Here we attempted to evaluate the contemporary knowledge about neural stem cell differentiation promoted by various drug-based regulations through a systems biology approach. Our model showed the phenomenon of DAPT-mediated antagonism of Enhancer of split [E(spl)] genes and enhancement of Shh target genes by a SAG agonist that were effectively demonstrated computationally and were consistent with experimental studies. However, in the case of model simulation of Wnt and EGF pathways, the model network did not supply any concurrent results with experimental data despite the fact that drugs were added at the appropriate positions. This paves insight into the potential of crosstalks between pathways considered in our study. Therefore, we manually developed a map of signaling crosstalk, which included the species connected by representatives from Notch, Shh, Wnt, and EGF pathways and highlighted the regulation of a single target gene, Hes-1, based on drug-induced simulations. These simulations provided results that matched with experimental studies. Therefore, these signaling crosstalk models complement as a tool toward the discovery of novel regulatory processes involved in neural stem cell maintenance, proliferation, and differentiation during mammalian central nervous system development. To our knowledge, this is the first report of a simple crosstalk map that highlights the differential regulation of neural stem cell differentiation and underscores the flow of positive and negative regulatory signals modulated by drugs.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
Notch is a transmembrane receptor that mediates local cell-cell communication and coordinates a signaling cascade. It plays a key role in modulating cell fate decisions throughout the development of invertebrate and vertebrate species and the misregulation leads to a number of human diseases.
Sivakumar KC, Dhanesh SB, Shobana S, James J, Mundayoor S.
\t
Omics: a Journal of Integrative Biology. 2011; 15(10):729-737
\t
Abstract:
\t
\t
The Notch, Sonic Hedgehog (Shh), Wnt, and EGF pathways have long been known to influence cell fate specification in the developing nervous system. Here we attempted to evaluate the contemporary knowledge about neural stem cell differentiation promoted by various drug-based regulations through a systems biology approach. Our model showed the phenomenon of DAPT-mediated antagonism of Enhancer of split [E(spl)] genes and enhancement of Shh target genes by a SAG agonist that were effectively demonstrated computationally and were consistent with experimental studies. However, in the case of model simulation of Wnt and EGF pathways, the model network did not supply any concurrent results with experimental data despite the fact that drugs were added at the appropriate positions. This paves insight into the potential of crosstalks between pathways considered in our study. Therefore, we manually developed a map of signaling crosstalk, which included the species connected by representatives from Notch, Shh, Wnt, and EGF pathways and highlighted the regulation of a single target gene, Hes-1, based on drug-induced simulations. These simulations provided results that matched with experimental studies. Therefore, these signaling crosstalk models complement as a tool toward the discovery of novel regulatory processes involved in neural stem cell maintenance, proliferation, and differentiation during mammalian central nervous system development. To our knowledge, this is the first report of a simple crosstalk map that highlights the differential regulation of neural stem cell differentiation and underscores the flow of positive and negative regulatory signals modulated by drugs.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
The secreted protein Wnt activates theheptahelical receptor Frizzled on nieghboring cells. Activation ofFrizzled causes the recruitment of additional membrane proteinswhich in turn result in 1) the activation of the proteinDishevelled via phosphorylation and 2) the activation of aheterotrimeric G protein of unknown type. Activation of Dishevelledresults in the down-regulation of the Beta-Catenin destructioncomplex which causes ubiquitination of Beta-Catenin and itsultimate degradation via the proteasome. Inhibition of theBeta-Catenin destruction complex yields a higher cytosolicconcentration of Beta-Catenin, which enters the nucleus, bindsvarious transcriptional regulatory molecules including the TCF/LEFclass of proteins, and results in the transcription of TCF/LEFtarget genes. Activation of the heterotrimeric G-protein pathway inturn activates Phospholipase C which in turn catalyzes thecatalysis of PI(4,5)P2 into DAG and IP3.
Sivakumar KC, Dhanesh SB, Shobana S, James J, Mundayoor S.
OMICS 2011 Oct; 15(10): 729-737
Abstract:
The Notch, Sonic Hedgehog (Shh), Wnt, and EGF pathways have long been known to influence cell fate specification in the developing nervous system. Here we attempted to evaluate the contemporary knowledge about neural stem cell differentiation promoted by various drug-based regulations through a systems biology approach. Our model showed the phenomenon of DAPT-mediated antagonism of Enhancer of split [E(spl)] genes and enhancement of Shh target genes by a SAG agonist that were effectively demonstrated computationally and were consistent with experimental studies. However, in the case of model simulation of Wnt and EGF pathways, the model network did not supply any concurrent results with experimental data despite the fact that drugs were added at the appropriate positions. This paves insight into the potential of crosstalks between pathways considered in our study. Therefore, we manually developed a map of signaling crosstalk, which included the species connected by representatives from Notch, Shh, Wnt, and EGF pathways and highlighted the regulation of a single target gene, Hes-1, based on drug-induced simulations. These simulations provided results that matched with experimental studies. Therefore, these signaling crosstalk models complement as a tool toward the discovery of novel regulatory processes involved in neural stem cell maintenance, proliferation, and differentiation during mammalian central nervous system development. To our knowledge, this is the first report of a simple crosstalk map that highlights the differential regulation of neural stem cell differentiation and underscores the flow of positive and negative regulatory signals modulated by drugs.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
Sivakumar KC, Dhanesh SB, Shobana S, James J, Mundayoor S.
OMICS 2011 Oct; 15(10): 729-737
Abstract:
The Notch, Sonic Hedgehog (Shh), Wnt, and EGF pathways have long been known to influence cell fate specification in the developing nervous system. Here we attempted to evaluate the contemporary knowledge about neural stem cell differentiation promoted by various drug-based regulations through a systems biology approach. Our model showed the phenomenon of DAPT-mediated antagonism of Enhancer of split [E(spl)] genes and enhancement of Shh target genes by a SAG agonist that were effectively demonstrated computationally and were consistent with experimental studies. However, in the case of model simulation of Wnt and EGF pathways, the model network did not supply any concurrent results with experimental data despite the fact that drugs were added at the appropriate positions. This paves insight into the potential of crosstalks between pathways considered in our study. Therefore, we manually developed a map of signaling crosstalk, which included the species connected by representatives from Notch, Shh, Wnt, and EGF pathways and highlighted the regulation of a single target gene, Hes-1, based on drug-induced simulations. These simulations provided results that matched with experimental studies. Therefore, these signaling crosstalk models complement as a tool toward the discovery of novel regulatory processes involved in neural stem cell maintenance, proliferation, and differentiation during mammalian central nervous system development. To our knowledge, this is the first report of a simple crosstalk map that highlights the differential regulation of neural stem cell differentiation and underscores the flow of positive and negative regulatory signals modulated by drugs.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
This a model from the article: Modeling hypertrophic IP3 transients in the cardiac myocyte. Cooling M, Hunter P, Crampin EJ. Biophys J2007 Nov 15;93(10):3421-33 17693463, Abstract: Cardiac hypertrophy is a known risk factor for heart disease, and at thecellular level is caused by a complex interaction of signal transductionpathways. The IP3-calcineurin pathway plays an important role in stimulating thetranscription factor NFAT which binds to DNA cooperatively with otherhypertrophic transcription factors. Using available kinetic data, we construct amathematical model of the IP3 signal production system after stimulation by ahypertrophic alpha-adrenergic agonist (endothelin-1) in the mouse atrial cardiacmyocyte. We use a global sensitivity analysis to identify key controllingparameters with respect to the resultant IP3 transient, including thephosphorylation of cell-membrane receptors, the ligand strength and bindingkinetics to precoupled (with G(alpha)GDP) receptor, and the kinetics associatedwith precoupling the receptors. We show that the kinetics associated with thereceptor system contribute to the behavior of the system to a great extent, withprecoupled receptors driving the response to extracellular ligand. Finally, byreparameterizing for a second hypertrophic alpha-adrenergic agonist,angiotensin-II, we show that differences in key receptor kinetic and membranedensity parameters are sufficient to explain different observed IP3 transientsin essentially the same pathway.
This model was taken from the CellML repository and automatically converted to SBML. The original model was: Cooling M, Hunter P, Crampin EJ. (2007) - version02 The original CellML model was created by: Cooling, Mike, m.cooling@aukland.ac.nz The University of Auckland The Bioengineering Institute
This a model from the article: A mathematical model of bone remodeling dynamics for normal bone cell populations and myeloma bone disease Bruce P Ayati, Claire M Edwards, Glenn F Webb and John P Wikswo. Biology Direct2010 Apr 20;5(28). 20406449, Abstract: BACKGROUND:Multiple myeloma is a hematologic malignancy associated with the development of a destructive osteolytic bone disease.RESULTS:Mathematical models are developed for normal bone remodeling and for the dysregulated bone remodeling that occurs in myeloma bone disease. The models examine the critical signaling between osteoclasts (bone resorption) and osteoblasts (bone formation). The interactions of osteoclasts and osteoblasts are modeled as a system of differential equations for these cell populations, which exhibit stable oscillations in the normal case and unstable oscillations in the myeloma case. In the case of untreated myeloma, osteoclasts increase and osteoblasts decrease, with net bone loss as the tumor grows. The therapeutic effects of targeting both myeloma cells and cells of the bone marrow microenvironment on these dynamics are examined.CONCLUSIONS:The current model accurately reflects myeloma bone disease and illustrates how treatment approaches may be investigated using such computational approaches.
Note:
The paper describes three models 1) Zero-dimensional Bone Model without Tumour, 2) Zero-dimensional Bone Model with Tumour and 3) Zero-dimensional Bone Model with Tumour and Drug Treatment. This model corresponds to the Zero-dimensional Bone Model without Tumour.
Typos in the publication:
Equation (4): The first term should be (\u03b21/\u03b11)^(g12/\u0393) and not (\u03b22/\u03b12)^(g12/\u0393)
Equation (14): The first term should be (\u03b21/\u03b11)^(((g12/(1+r12))/\u0393) and not (\u03b22/\u03b12)^(((g12/(1+r12))/\u0393)
Equation (13): The first term should be (\u03b21/\u03b11)^((1-g22+r22)/\u0393) and not (\u03b21/\u03b11)^((1-g22-r22)/\u0393)
All these corrections has been implemented in the model, with the authors agreement.
Beyond these, there are several mismatches between the equation numbers that are mentioned in for each equation and the reference that has been made to these equations in the figure legend.
This a model from the article: A mathematical model of bone remodeling dynamics for normal bone cell populations and myeloma bone disease Bruce P Ayati, Claire M Edwards, Glenn F Webb and John P Wikswo. Biology Direct2010 Apr 20;5(28). 20406449, Abstract: BACKGROUND:Multiple myeloma is a hematologic malignancy associated with the development of a destructive osteolytic bone disease.RESULTS:Mathematical models are developed for normal bone remodeling and for the dysregulated bone remodeling that occurs in myeloma bone disease. The models examine the critical signaling between osteoclasts (bone resorption) and osteoblasts (bone formation). The interactions of osteoclasts and osteoblasts are modeled as a system of differential equations for these cell populations, which exhibit stable oscillations in the normal case and unstable oscillations in the myeloma case. In the case of untreated myeloma, osteoclasts increase and osteoblasts decrease, with net bone loss as the tumor grows. The therapeutic effects of targeting both myeloma cells and cells of the bone marrow microenvironment on these dynamics are examined.CONCLUSIONS:The current model accurately reflects myeloma bone disease and illustrates how treatment approaches may be investigated using such computational approaches.
Note:
The paper describes three models 1) Zero-dimensional Bone Model without Tumour, 2) Zero-dimensional Bone Model with Tumour and 3) Zero-dimensional Bone Model with Tumour and Drug Treatment. This model corresponds to the Zero-dimensional Bone Model with Tumour.
Typos in the publication:
Equation (4): The first term should be (\u03b21/\u03b11)^(g12/\u0393) and not (\u03b22/\u03b12)^(g12/\u0393)
Equation (14): The first term should be (\u03b21/\u03b11)^(((g12/(1+r12))/\u0393) and not (\u03b22/\u03b12)^(((g12/(1+r12))/\u0393)
Equation (13): The first term should be (\u03b21/\u03b11)^((1-g22+r22)/\u0393) and not (\u03b21/\u03b11)^((1-g22-r22)/\u0393)
All these corrections has been implemented in the model, with the authors agreement.
Beyond these, there are several mismatches between the equation numbers that are mentioned in for each equation and the reference that has been made to these equations in the figure legend.
This a model from the article: A mathematical model of bone remodeling dynamics for normal bone cell populations and myeloma bone disease Bruce P Ayati, Claire M Edwards, Glenn F Webb and John P Wikswo. Biology Direct2010 Apr 20;5(28). 20406449, Abstract: BACKGROUND:Multiple myeloma is a hematologic malignancy associated with the development of a destructive osteolytic bone disease.RESULTS:Mathematical models are developed for normal bone remodeling and for the dysregulated bone remodeling that occurs in myeloma bone disease. The models examine the critical signaling between osteoclasts (bone resorption) and osteoblasts (bone formation). The interactions of osteoclasts and osteoblasts are modeled as a system of differential equations for these cell populations, which exhibit stable oscillations in the normal case and unstable oscillations in the myeloma case. In the case of untreated myeloma, osteoclasts increase and osteoblasts decrease, with net bone loss as the tumor grows. The therapeutic effects of targeting both myeloma cells and cells of the bone marrow microenvironment on these dynamics are examined.CONCLUSIONS:The current model accurately reflects myeloma bone disease and illustrates how treatment approaches may be investigated using such computational approaches.
Note:
The paper describes three models 1) Zero-dimensional Bone Model without Tumour, 2) Zero-dimensional Bone Model with Tumour and 3) Zero-dimensional Bone Model with Tumour and Drug Treatment. This model corresponds to the Zero-dimensional Bone Model with Tumour and Drug Treatment.
Typos in the publication:
Equation (4): The first term should be (\u03b21/\u03b11)^(g12/\u0393) and not (\u03b22/\u03b12)^(g12/\u0393)
Equation (14): The first term should be (\u03b21/\u03b11)^(((g12/(1+r12))/\u0393) and not (\u03b22/\u03b12)^(((g12/(1+r12))/\u0393)
Equation (13): The first term should be (\u03b21/\u03b11)^((1-g22+r22)/\u0393) and not (\u03b21/\u03b11)^((1-g22-r22)/\u0393)
All these corrections has been implemented in the model, with the authors agreement.
Beyond these, there are several mismatches between the equation numbers that are mentioned in for each equation and the reference that has been made to these equations in the figure legend.
This version of the model is very close to the version described in the paper with one exception: the binding of aspartate to the various receptor complexes, as well as the formation of the different complexes are modeled using chemical kinetics (mass action law), rather than instant equilibrium. The qualitative behaviour of the model is unchanged. Note that in order to quantitatively replicate the figure 8b, and in particular to have a basal bias of 0.7, we have to change the rate constant of the aspartate-triggered dephosphorylation of CheY from 59000 to 70000. The peaks have then slightly different values.
This model is from the article: Queueing up for enzymatic processing: correlated signaling through coupled degradation. Natalie A Cookson, William H Mather, Tal Danino, Octavio Mondrag\u00f3n-Palomino, Ruth J Williams, Lev S Tsimring, & Jeff Hasty Molecular Systems Biology2011; 7:561; DOI:10.1038/msb.2011.94 Abstract: High-throughput technologies have led to the generation of complex wiring diagrams as a post-sequencing paradigm for depicting the interactions between vast and diverse cellular species. While these diagrams are useful for analyzing biological systems on a large scale, a detailed understanding of the molecular mechanisms that underlie the observed network connections is critical for the further development of systems and synthetic biology. Here, we use queueing theory to investigate how \u2018waiting lines\u2019 can lead to correlations between protein \u2018customers\u2019 that are coupled solely through a downstream set of enzymatic \u2018servers\u2019. Using the E. coli ClpXP degradation machine as a model processing system, we observe significant cross-talk between two networks that are indirectly coupled through a common set of processors. We further illustrate the implications of enzymatic queueing using a synthetic biology application, in which two independent synthetic networks demonstrate synchronized behavior when common ClpXP machinery is overburdened. Our results demonstrate that such post-translational processes can lead to dynamic connections in cellular networks and may provide a mechanistic understanding of existing but currently inexplicable links.
Note: Individual stochastic trajectories for a queueing system in three different conditions, 1) Underloaded, 2) Balanced and 3) Overloaded, demonstrate correlation resonance. The parameter values in this model correspond to the Balanced Condition.
This model is from the article: Overexpression limits of fission yeast cell-cycle regulators in vivo and in silico. Moriya H, Chino A, Kapuy O, Csik\u00e1sz-Nagy A, Nov\u00e1k B. Mol Syst Biol. 2011 Dec 6;7:556. 22146300 , Abstract: Cellular systems are generally robust against fluctuations of intracellular parameters such as gene expression level. However, little is known about expression limits of genes required to halt cellular systems. In this study, using the fission yeast Schizosaccharomyces pombe, we developed a genetic 'tug-of-war' (gTOW) method to assess the overexpression limit of certain genes. Using gTOW, we determined copy number limits for 31 cell-cycle regulators; the limits varied from 1 to >100. Comparison with orthologs of the budding yeast Saccharomyces cerevisiae suggested the presence of a conserved fragile core in the eukaryotic cell cycle. Robustness profiles of networks regulating cytokinesis in both yeasts (septation-initiation network (SIN) and mitotic exit network (MEN)) were quite different, probably reflecting differences in their physiologic functions. Fragility in the regulation of GTPase spg1 was due to dosage imbalance against GTPase-activating protein (GAP) byr4. Using the gTOW data, we modified a mathematical model and successfully reproduced the robustness of the S. pombe cell cycle with the model.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
In summary, you are entitled to use this encoded model in absolutely any manner you deem suitable, verbatim, or with modification, alone or embedded it in a larger context, redistribute it, commercially or not, in a restricted way or not.
This model is from the article: Heterogeneity Reduces Sensitivity of Cell Death for TNF-Stimuli Schliemann M, Bullinger E, Borchers S, Allgower F, Findeisen R, Scheurich P. BMC Syst Biol. 2011 Dec 28;5(1):204. 22204418 , Abstract: BACKGROUND:Apoptosis is a form of programmed cell death essential for the maintenance of homeostasis and the removal of potentially damaged cells in multicellular organisms. By binding its cognate membrane receptor, TNF receptor type 1 (TNF-R1), the proinflammatory cytokine Tumor Necrosis Factor (TNF) activates pro-apoptotic signaling via caspase activation, but at the same time also stimulates nuclear factor kappaB (NF-kappaB)-mediated survival pathways. Differential dose-response relationships of these two major TNF signaling pathways have been described experimentally and using mathematical modeling. However, the quantitative analysis of the complex interplay between pro- and anti-apoptotic signaling pathways is an open question as it is challenging for several reasons: the overall signaling network is complex, various time scales are present, and cells respond quantitatively and qualitatively in a heterogeneous manner.RESULTS:This study analyzes the complex interplay of the crosstalk of TNF-R1 induced pro- and anti-apoptotic signaling pathways based on an experimentally validated mathematical model. The mathematical model describes the temporal responses on both the single cell level as well as the level of a heterogeneous cell population, as observed in the respective quantitative experiments using TNF-R1 stimuli of different strengths and durations. Global sensitivity of the heterogeneous population was quantified by measuring the average gradient of time of death versus each population parameter. This global sensitivity analysis uncovers the concentrations of Caspase-8 and Caspase-3, and their respective inhibitors BAR and XIAP, as key elements for deciding the cell's fate. A simulated knockout of the NF-kappaB-mediated anti-apoptotic signaling reveals the importance of this pathway for delaying the time of death, reducing the death rate in the case of pulse stimulation and significantly increasing cell-to-cell variability.CONCLUSIONS:Cell ensemble modeling of a heterogeneous cell population including a global sensitivity analysis presented here allowed us to illuminate the role of the different elements and parameters on apoptotic signaling. The receptors serve to transmit the external stimulus; procaspases and their inhibitors control the switching from life to death, while NF-kappaB enhances the heterogeneity of the cell population. The global sensitivity analysis of the cell population model further revealed an unexpected impact of heterogeneity, i.e. the reduction of parametric sensitivity.
Note: SBML model generated from Matlab system description on 12-July-2011 21:08:15 by exportSBML Copyright Eric Bullinger 2007-2011
This model is from the article: \tAnalyzing the functional properties of the creatine kinase system with multiscale 'sloppy' modeling. Hettling H, van Beek JH PLoS Comput Biol.2011 Aug;7(8):e1002130. PMEDID, Abstract: In this study the function of the two isoforms of creatine kinase (CK; EC 2.7.3.2) in myocardium is investigated. The 'phosphocreatine shuttle' hypothesis states that mitochondrial and cytosolic CK plays a pivotal role in the transport of high-energy phosphate (HEP) groups from mitochondria to myofibrils in contracting muscle. Temporal buffering of changes in ATP and ADP is another potential role of CK. With a mathematical model, we analyzed energy transport and damping of high peaks of ATP hydrolysis during the cardiac cycle. The analysis was based on multiscale data measured at the level of isolated enzymes, isolated mitochondria and on dynamic response times of oxidative phosphorylation measured at the whole heart level. Using 'sloppy modeling' ensemble simulations, we derived confidence intervals for predictions of the contributions by phosphocreatine (PCr) and ATP to the transfer of HEP from mitochondria to sites of ATP hydrolysis. Our calculations indicate that only 15\u00b18% (mean\u00b1SD) of transcytosolic energy transport is carried by PCr, contradicting the PCr shuttle hypothesis. We also predicted temporal buffering capabilities of the CK isoforms protecting against high peaks of ATP hydrolysis (3750 \u00b5M*s(-1)) in myofibrils. CK inhibition by 98% in silico leads to an increase in amplitude of mitochondrial ATP synthesis pulsation from 215\u00b123 to 566\u00b131 \u00b5M*s(-1), while amplitudes of oscillations in cytosolic ADP concentration double from 77\u00b111 to 146\u00b11 \u00b5M. Our findings indicate that CK acts as a large bandwidth high-capacity temporal energy buffer maintaining cellular ATP homeostasis and reducing oscillations in mitochondrial metabolism. However, the contribution of CK to the transport of high-energy phosphate groups appears limited. Mitochondrial CK activity lowers cytosolic inorganic phosphate levels while cytosolic CK has the opposite effect.
This model is from the article: Downregulation of PP2A(Cdc55) phosphatase by separase initiates mitotic exit in budding yeast. Queralt E, Lehane C, Novak B, Uhlmann F. Cell. 2006 May 19;125(4):719-32. 16713564 , Abstract: After anaphase, the high mitotic cyclin-dependent kinase (Cdk) activity is downregulated to promote exit from mitosis. To this end, in the budding yeast S. cerevisiae, the Cdk counteracting phosphatase Cdc14 is activated. In metaphase, Cdc14 is kept inactive in the nucleolus by its inhibitor Net1. During anaphase, Cdk- and Polo-dependent phosphorylation of Net1 is thought to release active Cdc14. How Net1 is phosphorylated specifically in anaphase, when mitotic kinase activity starts to decline, has remained unexplained. Here, we show that PP2A(Cdc55) phosphatase keeps Net1 underphosphorylated in metaphase. The sister chromatid-separating protease separase, activated at anaphase onset, interacts with and downregulates PP2A(Cdc55), thereby facilitating Cdk-dependent Net1 phosphorylation. PP2A(Cdc55) downregulation also promotes phosphorylation of Bfa1, contributing to activation of the \"mitotic exit network\" that sustains Cdc14 as Cdk activity declines. These findings allow us to present a new quantitative model for mitotic exit in budding yeast.
This model is from the article: Dynamics and feedback loops in the transforming growth factor \u03b2 signaling pathway. Wegner K, Bachmann A, Schad JU, Lucarelli P, Sahle S, Nickel P, Meyer C, Klingm\u00fcller U, Dooley S, Kummer U. Biophys Chem. 2012 Jan 5. 22284904 , Abstract: Transforming growth factor \u03b2 (TGF-\u03b2) ligands activate a signaling cascade with multiple cell context dependent outcomes. Disruption or disturbance leads to variant clinical disorders. To develop strategies for disease intervention, delineation of the pathway in further detail is required. Current theoretical models of this pathway describe production and degradation of signal mediating proteins and signal transduction from the cell surface into the nucleus, whereas feedback loops have not exhaustively been included. In this study we present a mathematical model to determine the relevance of feedback regulators (Arkadia, Smad7, Smurf1, Smurf2, SnoN and Ski) on TGF-\u03b2 target gene expression and the potential to initiate stable oscillations within a realistic parameter space. We employed massive sampling of the parameters space to pinpoint crucial players for potential oscillations as well as transcriptional product levels. We identified Smad7 and Smurf2 with the highest impact on the dynamics. Based on these findings, we conducted preliminary time course experiments.
This model is from the article: Modeling temperature entrainment of circadian clocks using the Arrhenius equation and a reconstructed model from Chlamydomonas reinhardtii Ines Heiland, Christian Bodenstein, Thomas Hinze, Olga Weisheit, Oliver Ebenhoeh, Maria Mittag and Stefan Schuster Journal of Biological Physics 4 March 2012; pp 1-16; doi: 10.1007/s10867-012-9264-x , Abstract: Endogenous circadian rhythms allow living organisms to anticipate daily variations in their natural environment. Temperature regulation and entrainment mechanisms of circadian clocks are still poorly understood. To better understand the molecular basis of these processes, we built a mathematical model based on experimental data examining temperature regulation of the circadian RNA-binding protein CHLAMY1 from the unicellular green alga Chlamydomonas reinhardtii , simulating the effect of temperature on the rates by applying the Arrhenius equation. Using numerical simulations, we demonstrate that our model is temperature-compensated and can be entrained to temperature cycles of various length and amplitude. The range of periods that allow entrainment of the model depends on the shape of the temperature cycles and is larger for sinusoidal compared to rectangular temperature curves. We show that the response to temperature of protein (de)phosphorylation rates play a key role in facilitating temperature entrainment of the oscillator in Chlamydomonas reinhardtii . We systematically investigated the response of our model to single temperature pulses to explain experimentally observed phase response curves.
This model is from the article: The clock gene circuit in Arabidopsis includes a repressilator with additional feedback loops Pokhilko A, Fern\u00e1ndez AP, Edwards KD, Southern MM, Halliday KJ, Millar AJ. Mol Syst Biol.2012 Mar 6;8:574. 22395476, Abstract: Circadian clocks synchronise biological processes with the day/night cycle, using molecular mechanisms that include interlocked, transcriptional feedback loops. Recent experiments identified the evening complex (EC) as a repressor that can be essential for gene expression rhythms in plants. Integrating the EC components in this role significantly alters our mechanistic, mathematical model of the clock gene circuit. Negative autoregulation of the EC genes constitutes the clock's evening loop, replacing the hypothetical component Y. The EC explains our earlier conjecture that the morning gene PSEUDO-RESPONSE REGULATOR 9 was repressed by an evening gene, previously identified with TIMING OF CAB EXPRESSION1 (TOC1). Our computational analysis suggests that TOC1 is a repressor of the morning genes LATE ELONGATED HYPOCOTYL and CIRCADIAN CLOCK ASSOCIATED1 rather than an activator as first conceived. This removes the necessity for the unknown component X (or TOC1mod) from previous clock models. As well as matching timeseries and phase-response data, the model provides a new conceptual framework for the plant clock that includes a three-component repressilator circuit in its complex structure.
This model is from the article: Root gravitropism is regulated by a transient lateral auxin gradient controlled by a tipping-point mechanism. Band LR, Wells DM, Larrieu A, Sun J, Middleton AM, French AP, Brunoud G, Sato EM, Wilson MH, P\u00e9ret B, Oliva M, Swarup R, Sairanen I, Parry G, Ljung K, Beeckman T, Garibaldi JM, Estelle M, Owen MR, Vissenberg K, Hodgman TC, Pridmore TP, King JR, Vernoux T, Bennett MJ. Proc Natl Acad Sci U S A.2012 Mar 20;109(12):4668-73 22393022, Abstract: Gravity profoundly influences plant growth and development. Plants respond to changes in orientation by using gravitropic responses to modify their growth. Cholodny and Went hypothesized over 80 years ago that plants bend in response to a gravity stimulus by generating a lateral gradient of a growth regulator at an organ's apex, later found to be auxin. Auxin regulates root growth by targeting Aux/IAA repressor proteins for degradation. We used an Aux/IAA-based reporter, domain II (DII)-VENUS, in conjunction with a mathematical model to quantify auxin redistribution following a gravity stimulus. Our multidisciplinary approach revealed that auxin is rapidly redistributed to the lower side of the root within minutes of a 90\u00b0 gravity stimulus. Unexpectedly, auxin asymmetry was rapidly lost as bending root tips reached an angle of 40\u00b0 to the horizontal. We hypothesize roots use a \"tipping point\" mechanism that operates to reverse the asymmetric auxin flow at the midpoint of root bending. These mechanistic insights illustrate the scientific value of developing quantitative reporters such as DII-VENUS in conjunction with parameterized mathematical models to provide high-resolution kinetics of hormone redistribution.
This model corresponds to the full model described in the article.
This model is from the article: Root gravitropism is regulated by a transient lateral auxin gradient controlled by a tipping-point mechanism. Band LR, Wells DM, Larrieu A, Sun J, Middleton AM, French AP, Brunoud G, Sato EM, Wilson MH, P\u00e9ret B, Oliva M, Swarup R, Sairanen I, Parry G, Ljung K, Beeckman T, Garibaldi JM, Estelle M, Owen MR, Vissenberg K, Hodgman TC, Pridmore TP, King JR, Vernoux T, Bennett MJ. Proc Natl Acad Sci U S A.2012 Mar 20;109(12):4668-73 22393022, Abstract: Gravity profoundly influences plant growth and development. Plants respond to changes in orientation by using gravitropic responses to modify their growth. Cholodny and Went hypothesized over 80 years ago that plants bend in response to a gravity stimulus by generating a lateral gradient of a growth regulator at an organ's apex, later found to be auxin. Auxin regulates root growth by targeting Aux/IAA repressor proteins for degradation. We used an Aux/IAA-based reporter, domain II (DII)-VENUS, in conjunction with a mathematical model to quantify auxin redistribution following a gravity stimulus. Our multidisciplinary approach revealed that auxin is rapidly redistributed to the lower side of the root within minutes of a 90\u00b0 gravity stimulus. Unexpectedly, auxin asymmetry was rapidly lost as bending root tips reached an angle of 40\u00b0 to the horizontal. We hypothesize roots use a \"tipping point\" mechanism that operates to reverse the asymmetric auxin flow at the midpoint of root bending. These mechanistic insights illustrate the scientific value of developing quantitative reporters such as DII-VENUS in conjunction with parameterized mathematical models to provide high-resolution kinetics of hormone redistribution.
This model corresponds to the simplified model described in the article. It is assumed that, on the timescale of DII-VENUS degradation, the concentrations of auxin, TIR1/AFB, and their complexes can be approximated by quasi-steady-state expressions. This reduced the full model to a single ODE that describes how the DII-VENUS dynamics depend on the auxin influx and four parameter groupings.
This model is from the article: Reduction of off-flavor generation in soybean homogenates: a mathematical model. Mellor N , Bligh F , Chandler I , Hodgman C \tJ. Food Sci.2010 Sep; 75(7): R131-8; PMID: 2153556, Abstract: The generation of off-flavors in soybean homogenates such as n-hexanal via the lipoxygenase (LOX) pathway can be a problem in the processed food industry. Previous studies have examined the effect of using soybean varieties missing one or more of the 3 LOX isozymes on n-hexanal generation. A dynamic mathematical model of the soybean LOX pathway using ordinary differential equations was constructed using parameters estimated from existing data with the aim of predicting how n-hexanal generation could be reduced. Time-course simulations of LOX-null beans were run and compared with experimental results. Model L(2), L(3), and L(12) beans were within the range relative to the wild type found experimentally, with L(13) and L(23) beans close to the experimental range. Model L(1) beans produced much more n-hexanal relative to the wild type than those in experiments. Sensitivity analysis indicates that reducing the estimated K(m) parameter for LOX isozyme 3 (L-3) would improve the fit between model predictions and experimental results found in the literature. The model also predicts that increasing L-3 or reducing L-2 levels within beans may reduce n-hexanal generation. PRACTICAL APPLICATION: This work describes the use of mathematics to attempt to quantify the enzyme-catalyzed conversions of compounds in soybean homogenates into undesirable flavors, primarily from the compound n-hexanal. The effect of different soybean genotypes and enzyme kinetic constants was also studied, leading to recommendations on which combinations might minimize off-flavor levels and what further work might be carried out to substantiate these conclusions.
This model is from the article: The influence of cytokinin-auxin cross-regulation on cell-fate determination in Arabidopsis thaliana root development Muraro D, Byrne H, King J, Voss U, Kieber J, Bennett M. J Theor Biol.2011 Aug 21;283(1):152-67.PMID: 21640126, Abstract: Root growth and development in Arabidopsis thaliana are sustained by a specialised zone termed the meristem, which contains a population of dividing and differentiating cells that are functionally analogous to a stem cell niche in animals. The hormones auxin and cytokinin control meristem size antagonistically. Local accumulation of auxin promotes cell division and the initiation of a lateral root primordium. By contrast, high cytokinin concentrations disrupt the regular pattern of divisions that characterises lateral root development, and promote differentiation. The way in which the hormones interact is controlled by a genetic regulatory network. In this paper, we propose a deterministic mathematical model to describe this network and present model simulations that reproduce the experimentally observed effects of cytokinin on the expression of auxin regulated genes. We show how auxin response genes and auxin efflux transporters may be affected by the presence of cytokinin. We also analyse and compare the responses of the hormones auxin and cytokinin to changes in their supply with the responses obtained by genetic mutations of SHY2, which encodes a protein that plays a key role in balancing cytokinin and auxin regulation of meristem size. We show that although shy2 mutations can qualitatively reproduce the effect of varying auxin and cytokinin supply on their response genes, some elements of the network respond differently to changes in hormonal supply and to genetic mutations, implying a different, general response of the network. We conclude that an analysis based on the ratio between these two hormones may be misleading and that a mathematical model can serve as a useful tool for stimulate further experimental work by predicting the response of the network to changes in hormone levels and to other genetic mutations.
This model is from the article: Asymmetric positive feedback loops reliably control biological responses Alexander V Ratushny, Ramsey A Saleem, Katherine Sitko, Stephen A Ramsey & John D Aitchison Mol Syst Biol. 2012 Apr 24;8:577. 22531117 , Abstract: Positive feedback is a common mechanism enabling biological systems to respond to stimuli in a switch-like manner. Such systems are often characterized by the requisite formation of a heterodimer where only one of the pair is subject to feedback. This ASymmetric Self-UpREgulation (ASSURE) motif is central to many biological systems, including cholesterol homeostasis (LXR\u03b1/RXR\u03b1), adipocyte differentiation (PPAR\u03b3/RXR\u03b1), development and differentiation (RAR/RXR), myogenesis (MyoD/E12) and cellular antiviral defense (IRF3/IRF7). To understand why this motif is so prevalent, we examined its properties in an evolutionarily conserved transcriptional regulatory network in yeast (Oaf1p/Pip2p). We demonstrate that the asymmetry in positive feedback confers a competitive advantage and allows the system to robustly increase its responsiveness while precisely tuning the response to a consistent level in the presence of varying stimuli. This study reveals evolutionary advantages for the ASSURE motif, and mechanisms for control, that are relevant to pharmacologic intervention and synthetic biology applications.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
In summary, you are entitled to use this encoded model in absolutely any manner you deem suitable, verbatim, or with modification, alone or embedded it in a larger context, redistribute it, commercially or not, in a restricted way or not.
This model is from the article: Asymmetric positive feedback loops reliably control biological responses Alexander V Ratushny, Ramsey A Saleem, Katherine Sitko, Stephen A Ramsey & John D Aitchison Mol Syst Biol. 2012 Apr 24;8:577. 22531117 , Abstract: Positive feedback is a common mechanism enabling biological systems to respond to stimuli in a switch-like manner. Such systems are often characterized by the requisite formation of a heterodimer where only one of the pair is subject to feedback. This ASymmetric Self-UpREgulation (ASSURE) motif is central to many biological systems, including cholesterol homeostasis (LXR\u03b1/RXR\u03b1), adipocyte differentiation (PPAR\u03b3/RXR\u03b1), development and differentiation (RAR/RXR), myogenesis (MyoD/E12) and cellular antiviral defense (IRF3/IRF7). To understand why this motif is so prevalent, we examined its properties in an evolutionarily conserved transcriptional regulatory network in yeast (Oaf1p/Pip2p). We demonstrate that the asymmetry in positive feedback confers a competitive advantage and allows the system to robustly increase its responsiveness while precisely tuning the response to a consistent level in the presence of varying stimuli. This study reveals evolutionary advantages for the ASSURE motif, and mechanisms for control, that are relevant to pharmacologic intervention and synthetic biology applications.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
In summary, you are entitled to use this encoded model in absolutely any manner you deem suitable, verbatim, or with modification, alone or embedded it in a larger context, redistribute it, commercially or not, in a restricted way or not.
This model is from the article: Asymmetric positive feedback loops reliably control biological responses Alexander V Ratushny, Ramsey A Saleem, Katherine Sitko, Stephen A Ramsey & John D Aitchison Mol Syst Biol. 2012 Apr 24;8:577. 22531117 , Abstract: Positive feedback is a common mechanism enabling biological systems to respond to stimuli in a switch-like manner. Such systems are often characterized by the requisite formation of a heterodimer where only one of the pair is subject to feedback. This ASymmetric Self-UpREgulation (ASSURE) motif is central to many biological systems, including cholesterol homeostasis (LXR\u03b1/RXR\u03b1), adipocyte differentiation (PPAR\u03b3/RXR\u03b1), development and differentiation (RAR/RXR), myogenesis (MyoD/E12) and cellular antiviral defense (IRF3/IRF7). To understand why this motif is so prevalent, we examined its properties in an evolutionarily conserved transcriptional regulatory network in yeast (Oaf1p/Pip2p). We demonstrate that the asymmetry in positive feedback confers a competitive advantage and allows the system to robustly increase its responsiveness while precisely tuning the response to a consistent level in the presence of varying stimuli. This study reveals evolutionary advantages for the ASSURE motif, and mechanisms for control, that are relevant to pharmacologic intervention and synthetic biology applications.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
In summary, you are entitled to use this encoded model in absolutely any manner you deem suitable, verbatim, or with modification, alone or embedded it in a larger context, redistribute it, commercially or not, in a restricted way or not.
This model is from the article: Asymmetric positive feedback loops reliably control biological responses Alexander V Ratushny, Ramsey A Saleem, Katherine Sitko, Stephen A Ramsey & John D Aitchison Mol Syst Biol. 2012 Apr 24;8:577. 22531117 , Abstract: Positive feedback is a common mechanism enabling biological systems to respond to stimuli in a switch-like manner. Such systems are often characterized by the requisite formation of a heterodimer where only one of the pair is subject to feedback. This ASymmetric Self-UpREgulation (ASSURE) motif is central to many biological systems, including cholesterol homeostasis (LXR\u03b1/RXR\u03b1), adipocyte differentiation (PPAR\u03b3/RXR\u03b1), development and differentiation (RAR/RXR), myogenesis (MyoD/E12) and cellular antiviral defense (IRF3/IRF7). To understand why this motif is so prevalent, we examined its properties in an evolutionarily conserved transcriptional regulatory network in yeast (Oaf1p/Pip2p). We demonstrate that the asymmetry in positive feedback confers a competitive advantage and allows the system to robustly increase its responsiveness while precisely tuning the response to a consistent level in the presence of varying stimuli. This study reveals evolutionary advantages for the ASSURE motif, and mechanisms for control, that are relevant to pharmacologic intervention and synthetic biology applications.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
In summary, you are entitled to use this encoded model in absolutely any manner you deem suitable, verbatim, or with modification, alone or embedded it in a larger context, redistribute it, commercially or not, in a restricted way or not.
This model is from the article: Asymmetric positive feedback loops reliably control biological responses Alexander V Ratushny, Ramsey A Saleem, Katherine Sitko, Stephen A Ramsey & John D Aitchison Mol Syst Biol. 2012 Apr 24;8:577. 22531117 , Abstract: Positive feedback is a common mechanism enabling biological systems to respond to stimuli in a switch-like manner. Such systems are often characterized by the requisite formation of a heterodimer where only one of the pair is subject to feedback. This ASymmetric Self-UpREgulation (ASSURE) motif is central to many biological systems, including cholesterol homeostasis (LXR\u03b1/RXR\u03b1), adipocyte differentiation (PPAR\u03b3/RXR\u03b1), development and differentiation (RAR/RXR), myogenesis (MyoD/E12) and cellular antiviral defense (IRF3/IRF7). To understand why this motif is so prevalent, we examined its properties in an evolutionarily conserved transcriptional regulatory network in yeast (Oaf1p/Pip2p). We demonstrate that the asymmetry in positive feedback confers a competitive advantage and allows the system to robustly increase its responsiveness while precisely tuning the response to a consistent level in the presence of varying stimuli. This study reveals evolutionary advantages for the ASSURE motif, and mechanisms for control, that are relevant to pharmacologic intervention and synthetic biology applications.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
In summary, you are entitled to use this encoded model in absolutely any manner you deem suitable, verbatim, or with modification, alone or embedded it in a larger context, redistribute it, commercially or not, in a restricted way or not.
This model is from the article: Mathematical modeling elucidates the role of transcriptional feedback in gibberellin signaling. Middleton AM , \u00dabeda-Tom\u00e1s S , Griffiths J , Holman T , Hedden P , Thomas SG , Phillips AL , Holdsworth MJ , Bennett MJ , King JR, Owen MR Proc. Natl. Acad. Sci. U.S.A. 2012 May; 109(19): 7571-6 22523240 , Abstract: The hormone gibberellin (GA) is a key regulator of plant growth. Many of the components of the gibberellin signal transduction [e.g., GIBBERELLIN INSENSITIVE DWARF 1 (GID1) and DELLA], biosynthesis [e.g., GA 20-oxidase (GA20ox) and GA3ox], and deactivation pathways have been identified. Gibberellin binds its receptor, GID1, to form a complex that mediates the degradation of DELLA proteins. In this way, gibberellin relieves DELLA-dependent growth repression. However, gibberellin regulates expression of GID1, GA20ox, and GA3ox, and there is also evidence that it regulates DELLA expression. In this paper, we use integrated mathematical modeling and experiments to understand how these feedback loops interact to control gibberellin signaling. Model simulations are in good agreement with in vitro data on the signal transduction and biosynthesis pathways and in vivo data on the expression levels of gibberellin-responsive genes. We find that GA-GID1 interactions are characterized by two timescales (because of a lid on GID1 that can open and close slowly relative to GA-GID1 binding and dissociation). Furthermore, the model accurately predicts the response to exogenous gibberellin after a number of chemical and genetic perturbations. Finally, we investigate the role of the various feedback loops in gibberellin signaling. We find that regulation of GA20ox transcription plays a significant role in both modulating the level of endogenous gibberellin and generating overshoots after the removal of exogenous gibberellin. Moreover, although the contribution of other individual feedback loops seems relatively small, GID1 and DELLA transcriptional regulation acts synergistically with GA20ox feedback.
This model is from the article: Mechanistic explanations for counter-intuitive phosphorylation dynamics of the insulin receptor and insulin receptor substrate-1 in response to insulin in murine adipocytes. Nyman E, Fagerholm S, Jullesson D, Str\u00e5lfors P, Cedersund G. FEBS J. 2012 Jan 16. 22248283 , Abstract: Insulin signaling through insulin receptor (IR) and insulin receptor substrate-1 (IRS1) is important for insulin control of target cells. We have previously demonstrated a rapid and simultaneous overshoot behavior in the phosphorylation dynamics of IR and IRS1 in human adipocytes. Herein, we demonstrate that in murine adipocytes a similar overshoot behavior is not simultaneous for IR and IRS1. The peak of IRS1 phosphorylation, which is a direct consequence of the phosphorylation and the activation of IR, occurs earlier than the peak of IR phosphorylation. We used a conclusive modeling framework to unravel the mechanisms behind this counter-intuitive order of phosphorylation. Through a number of rejections, we demonstrate that two fundamentally different mechanisms may create the reversed order of peaks: (i) two pools of phosphorylated IR, where a large pool of internalized IR peaks late, but phosphorylation of IRS1 is governed by a small plasma membrane-localized pool of IR with an early peak, or (ii) inhibition of the IR-catalyzed phosphorylation of IRS1 by negative feedback. Although (i) may explain the reversed order, this two-pool hypothesis alone requires extensive internalization of IR, which is not supported by experimental data. However, with the additional assumption of limiting concentrations of IRS1, (i) can explain all data. Also, (ii) can explain all available data. Our findings illustrate how modeling can potentiate reasoning, to help draw nontrivial conclusions regarding competing mechanisms in signaling networks. Our work also reveals new differences between human and murine insulin signaling. Database The mathematical model described here has been submitted to the Online Cellular Systems Modelling Database and can be accessed at http://jjj.biochem.sun.ac.za/database/nyman/index.html free of charge.
Faratian D, Goltsov A, Lebedeva G, Sorokin A, Moodie S, Mullen P, Kay C, Um IH, Langdon S, Goryanin I, Harrison DJ.
Cancer Res. 2009 Aug; 69(16): 6713-6720
Abstract:
Resistance to targeted cancer therapies such as trastuzumab is a frequent clinical problem not solely because of insufficient expression of HER2 receptor but also because of the overriding activation states of cell signaling pathways. Systems biology approaches lend themselves to rapid in silico testing of factors, which may confer resistance to targeted therapies. Inthis study, we aimed to develop a new kinetic model that could be interrogated to predict resistance to receptor tyrosine kinase (RTK) inhibitor therapies and directly test predictions in vitro and in clinical samples. The new mathematical model included RTK inhibitor antibody binding, HER2/HER3 dimerization and inhibition, AKT/mitogen-activated protein kinase cross-talk, and the regulatory properties of PTEN. The model was parameterized using quantitative phosphoprotein expression data from cancer cell lines using reverse-phase protein microarrays. Quantitative PTEN protein expression was found to be the key determinant of resistance to anti-HER2 therapy in silico, which was predictive of unseen experiments in vitro using the PTEN inhibitor bp(V). When measured in cancer cell lines, PTEN expression predicts sensitivity to anti-HER2 therapy; furthermore, this quantitative measurement is more predictive of response (relative risk, 3.0; 95% confidence interval, 1.6-5.5; P < 0.0001) than other pathway components taken in isolation and when tested by multivariate analysis in a cohort of 122 breast cancers treated with trastuzumab. For the first time, a systems biology approach has successfully been used to stratify patients for personalized therapy in cancer and is further compelling evidence that PTEN, appropriately measured in the clinical setting, refines clinical decision making in patients treated with anti-HER2 therapies.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
The efficacy of many antibiotics decreases with increasing bacterial density, a phenomenon called the \u2018inoculum effect\u2019 (IE). This study reveals that, for ribosome-targeting antibiotics, IE is due to bistable inhibition of bacterial growth, which reduces the efficacy of certain treatment frequencies.
Tan C, Phillip Smith R, Srimani JK, Riccione KA, Prasada S, Kuehn M, You L.
Mol Syst Biol. 2012 Oct 9; 8:617
Abstract:
The inoculum effect (IE) refers to the decreasing efficacy of an antibiotic with increasing bacterial density. It represents a unique strategy of antibiotic tolerance and it can complicate design of effective antibiotic treatment of bacterial infections. To gain insight into this phenomenon, we have analyzed responses of a lab strain of Escherichia coli to antibiotics that target the ribosome. We show that the IE can be explained by bistable inhibition of bacterial growth. A critical requirement for this bistability is sufficiently fast degradation of ribosomes, which can result from antibiotic-induced heat-shock response. Furthermore, antibiotics that elicit the IE can lead to 'band-pass' response of bacterial growth to periodic antibiotic treatment: the treatment efficacy drastically diminishes at intermediate frequencies of treatment. Our proposed mechanism for the IE may be generally applicable to other bacterial species treated with antibiotics targeting the ribosomes.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
Mosca2012 - Central Carbon Metabolism Regulated by AKT
The role of the PI3K/Akt/PKB signalling pathway in oncogenesis has been extensively investigated and altered expression or mutations of many components of this pathway have been implicated in human cancers. Indeed, expression of constitutively active forms of Akt/PKB can prevent cell death upon growth factor withdrawal. PI3K/Akt/mTOR-mediated survival relies on a profound metabolic adaptation, including aerobic glycolysis. Here, the link between the PI3K/Akt/mTOR pathway, glycolysis, lactic acid production and nucleotide biosynthesis has been modelled, considering two states - high and low PI3K/Akt/mTOR activity. The high PI3K/Akt/mTOR activity represents cancer cell line where PI3K/Akt/mTOR promotes a high rate of glucose metabolism (condition H) and the low PI3K/Akt/mTOR activity is characterised by a lower glycolytic rate due to a reduced PI3K/Akt/mTOR signal (condition L). This model corresponds to the high PI3K/Akt/mTOR signal (condition H).
Mosca E, Alfieri R, Maj C, Bevilacqua A, Canti G, Milanesi L.
Frontiers in Systems Biology. 2012 Oct 13
Abstract:
Signal transduction pathways and gene regulation determine a major reorganization of metabolic activities in order to support cell proliferation. Protein Kinase B (PKB), also known as Akt, participates in the PI3K/Akt/mTOR pathway, a master regulator of aerobic glycolysis and cellular biosynthesis, two activities shown by both normal and cancer proliferating cells. Not surprisingly considering its relevance for cellular metabolism, Akt/PKB is often found hyperactive in cancer cells. In the last decade, many efforts have been made to improve the understanding of the control of glucose metabolism and the identification of a therapeutic window between proliferating cancer cells and proliferating normal cells. In this context, we have modelled the link between the PI3K/Akt/mTOR pathway, glycolysis, lactic acid production and nucleotide biosynthesis. We used a computational model in order to compare two metabolic states generated by the specific variation of the metabolic fluxes regulated by the activity of the PI3K/Akt/mTOR pathway. One of the two states represented the metabolism of a growing cancer cell characterised by aerobic glycolysis and cellular biosynthesis, while the other state represented the same metabolic network with a reduced glycolytic rate and a higher mitochondrial pyruvate metabolism, as reported in literature in relation to the activity of the PI3K/Akt/mTOR. Some steps that link glycolysis and pentose phosphate pathway revealed their importance for controlling the dynamics of cancer glucose metabolism.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
Bianconi2012 - EGFR and IGF1R pathway in lung cancer
EGFR and IGF1R pathways play a key role in various human cancers and are crucial for tumour transformation and survival of malignant cells. High EGFR and IGF1R expression and activity has been associated with multiple aspects of cancer progression including tumourigenesis, metastasis, resistance to chemotherapeutics and other molecularly targeted drugs. Here, the biological relationship between the proteins involved in EGFR and IGF1R pathways and the downstream MAPK and PIK3 networks has been modelled to study the time behaviour of the overall system, and the functional interdependencies among the receptors, the proteins and kinases involved.
Bianconi F, Baldelli E, Ludovini V, Crin\u00f2 L, Flacco A, Valigi P.
Biotechnol Adv. 2012 Jan-Feb;30(1):142-53.
Abstract:
In this paper we propose a Systems Biology approach to understand the molecular biology of the Epidermal Growth Factor Receptor (EGFR, also known as ErbB1/HER1) and type 1 Insulin-like Growth Factor (IGF1R) pathways in non-small cell lung cancer (NSCLC). This approach, combined with Translational Oncology methodologies, is used to address the experimental evidence of a close relationship among EGFR and IGF1R protein expression, by immunohistochemistry (IHC) and gene amplification, by in situ hybridization (FISH) and the corresponding ability to develop a more aggressive behavior. We develop a detailed in silico model, based on ordinary differential equations, of the pathways and study the dynamic implications of receptor alterations on the time behavior of the MAPK cascade down to ERK, which in turn governs proliferation and cell migration. In addition, an extensive sensitivity analysis of the proposed model is carried out and a simplified model is proposed which allows us to infer a similar relationship among EGFR and IGF1R activities and disease outcome.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
Achcar2012 - Glycolysis in bloodstream form T. brucei
Kinetic models of metabolism require quantitative knowledge of detailed kinetic parameters. However, the knowledge about these parameters is often uncertain. An analysis of the effect of parameter uncertainties on a particularly well defined example of a quantitative metablic model, the model of glycolysis in bloodstream form Trypanosoma brucei , has been presented here.
Kinetic models of metabolism require detailed knowledge of kinetic parameters. However, due to measurement errors or lack of data this knowledge is often uncertain. The model of glycolysis in the parasitic protozoan Trypanosoma brucei is a particularly well analysed example of a quantitative metabolic model, but so far it has been studied with a fixed set of parameters only. Here we evaluate the effect of parameter uncertainty. In order to define probability distributions for each parameter, information about the experimental sources and confidence intervals for all parameters were collected. We created a wiki-based website dedicated to the detailed documentation of this information: the SilicoTryp wiki (http://silicotryp.ibls.gla.ac.uk/wiki/Glycolysis). Using information collected in the wiki, we then assigned probability distributions to all parameters of the model. This allowed us to sample sets of alternative models, accurately representing our degree of uncertainty. Some properties of the model, such as the repartition of the glycolytic flux between the glycerol and pyruvate producing branches, are robust to these uncertainties. However, our analysis also allowed us to identify fragilities of the model leading to the accumulation of 3-phosphoglycerate and/or pyruvate. The analysis of the control coefficients revealed the importance of taking into account the uncertainties about the parameters, as the ranking of the reactions can be greatly affected. This work will now form the basis for a comprehensive Bayesian analysis and extension of the model considering alternative topologies.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
The high osmolarity glycerol (HOG) pathway in the yeast Saccharomyces cerevisiae is one of the best-studied mitogen-activated protein kinase (MAPK) pathways and serves as a prototype signalling system for eukaryotes. This pathway is necessary and sufficient to adapt to high external osmolarity. A key component of this pathway is the stress-activated protein kinase (SAPK) Hog1, which is rapidly phosphorylated by the SAPK kinase Pbs2 upon hyper-osmotic shock, and which is the terminal kinase of two parallel signalling pathways, subsequently called the Sho1 branch and the Sln1 branch, respectively. Ensemble modelling (192 models) is used to study the yeast HOG pathway, a prototype for eukaryotic mitogen-activated kinase signalling systems. The best fit model (Model Nr.22: described here) provides new insights into the function of this system, some of which are then experimentally validated.
Schaber J, Baltanas R, Bush A, Klipp E, Colman-Lerner A.
Mol Syst Biol. 2012 Nov 13;8:622.
Abstract:
The high osmolarity glycerol (HOG) pathway in yeast serves as a prototype signalling system for eukaryotes. We used an unprecedented amount of data to parameterise 192 models capturing different hypotheses about molecular mechanisms underlying osmo-adaptation and selected a best approximating model. This model implied novel mechanisms regulating osmo-adaptation in yeast. The model suggested that (i) the main mechanism for osmo-adaptation is a fast and transient non-transcriptional Hog1-mediated activation of glycerol production, (ii) the transcriptional response serves to maintain an increased steady-state glycerol production with low steady-state Hog1 activity, and (iii) fast negative feedbacks of activated Hog1 on upstream signalling branches serves to stabilise adaptation response. The best approximating model also indicated that homoeostatic adaptive systems with two parallel redundant signalling branches show a more robust and faster response than single-branch systems. We corroborated this notion to a large extent by dedicated measurements of volume recovery in single cells. Our study also demonstrates that systematically testing a model ensemble against data has the potential to achieve a better and unbiased understanding of molecular mechanisms.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
Sarma2012 - Interaction topologies of MAPK cascade (M4_K2_USEQ)
The paper presents the various interaction topologies between the kinases and phosphatases of MAPK cascade. They are represented as M1, M2, M3 and M4. The kinases of the cascades are MKKK, MKK and MK, and Phos1, Phos2 and Phos3 are phosphatases of the system. All three kinases in a M1 type network have specific phosphatases Phos1, Phos2 and Phos3 for the dephosphorylation process. In a M2 type system, kinases MKKK and MKK are dephosphorylated by Phos1 and MK is dephosphorylated by Phos2. The architecture of system like M3 is such that MKKK gets dephosphorylated by Phos1, whereas Phos2 dephosphorylates both MKK and MK. Finally, the MAPK cascade exhibiting more complex design of interaction such as M4 is such that MKKK and MKK are dephosphorylated by Phos1 whereas MKK and MK are dephosphorylated by Phos2. In addition, as it is plausible that the kinases can sequester their respective phosphatases by binding to them, this is considered in the design of the systems (PSEQ-sequestrated system; USEQ-Unsequestrated system). The robustness of different interaction designs of the systems is checked, considering both MichaelisMenten type kinetics (K1) and elementary mass action kinetics (K2). In the living systems, the MAPK cascade transmit both short and long duration signals where short duration signals trigger proliferation and long duration signals trigger cell differentiation. These signal variants are considered to interpret the systems behaviour. It is also tested how the robustness and signal response behaviour of K2 models are affected when K2 assumes quasi steady state (QSS). The combinations of the above variants resulted in 40 models (MODEL1204280001-40). All these 40 models are available from BioModels Database .
Models that correspond to type M4 with mass-action kinetics K2, in four condition 1) USEQ [ MODEL1204280020 - M4_K2_USEQ], 2) PSEQ [ MODEL1204280024 - M4_K2_PSEQ], 3) QSS_USEQ [ MODEL1204280036 - M4_K2_QSS_USEQ] and 4) QSS_PSEQ [ MODEL1204280040 - M4_K2_QSS_PSEQ] are available from the curated branch. The remaining 36 models can be accessed from the non-curated branch.
This model [ MODEL1204280020 - M4_K2_USEQ] correspond to type M4 with mass-action kinetics K2, in USEQ (Unsequestrated ) condition.
BACKGROUND: The three layer mitogen activated protein kinase (MAPK) signaling cascade exhibits different designs of interactions between its kinases and phosphatases. While the sequential interactions between the three kinases of the cascade are tightly preserved, the phosphatases of the cascade, such as MKP3 and PP2A, exhibit relatively diverse interactions with their substrate kinases. Additionally, the kinases of the MAPK cascade can also sequester their phosphatases. Thus, each topologically distinct interaction design of kinases and phosphatases could exhibit unique signal processing characteristics, and the presence of phosphatase sequestration may lead to further fine tuning of the propagated signal.
RESULTS: We have built four models of the MAPK cascade, each model with identical kinase-kinase interactions but unique kinases-phosphatases interactions. Our simulations unravelled that MAPK cascade's robustness to external perturbations is a function of nature of interaction between its kinases and phosphatases. The cascade's output robustness was enhanced when phosphatases were sequestrated by their target kinases. We uncovered a novel implicit/hidden negative feedback loop from the phosphatase MKP3 to its upstream kinase Raf-1, in a cascade resembling the B cell MAPK cascade. Notably, strength of the feedback loop was reciprocal to the strength of phosphatases' sequestration and stronger sequestration abolished the feedback loop completely. An experimental method to verify the presence of the feedback loop is also proposed. We further showed, when the models were activated by transient signal, memory (total time taken by the cascade output to reach its unstimulated level after removal of signal) of a cascade was determined by the specific designs of interaction among its kinases and phosphatases.
CONCLUSIONS: Differences in interaction designs among the kinases and phosphatases can differentially shape the robustness and signal response behaviour of the MAPK cascade and phosphatase sequestration dramatically enhances the robustness to perturbations in each of the cascade. An implicit negative feedback loop was uncovered from our analysis and we found that strength of the negative feedback loop is reciprocally related to the strength of phosphatase sequestration. Duration of output phosphorylation in response to a transient signal was also found to be determined by the individual cascade's kinase-phosphatase interaction design.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
Sarma2012 - Interaction topologies of MAPK cascade (M4_K2_PSEQ)
The paper presents the various interaction topologies between the kinases and phosphatases of MAPK cascade. They are represented as M1, M2, M3 and M4. The kinases of the cascades are MKKK, MKK and MK, and Phos1, Phos2 and Phos3 are phosphatases of the system. All three kinases in a M1 type network have specific phosphatases Phos1, Phos2 and Phos3 for the dephosphorylation process. In a M2 type system, kinases MKKK and MKK are dephosphorylated by Phos1 and MK is dephosphorylated by Phos2. The architecture of system like M3 is such that MKKK gets dephosphorylated by Phos1, whereas Phos2 dephosphorylates both MKK and MK. Finally, the MAPK cascade exhibiting more complex design of interaction such as M4 is such that MKKK and MKK are dephosphorylated by Phos1 whereas MKK and MK are dephosphorylated by Phos2. In addition, as it is plausible that the kinases can sequester their respective phosphatases by binding to them, this is considered in the design of the systems (PSEQ-sequestrated system; USEQ-Unsequestrated system). The robustness of different interaction designs of the systems is checked, considering both MichaelisMenten type kinetics (K1) and elementary mass action kinetics (K2). In the living systems, the MAPK cascade transmit both short and long duration signals where short duration signals trigger proliferation and long duration signals trigger cell differentiation. These signal variants are considered to interpret the systems behaviour. It is also tested how the robustness and signal response behaviour of K2 models are affected when K2 assumes quasi steady state (QSS). The combinations of the above variants resulted in 40 models (MODEL1204280001-MODEL1204280040). All these 40 models are available from BioModels Database .
Models that correspond to type M4 with mass-action kinetics K2, in four condition 1) USEQ [ MODEL1204280020 - M4_K2_USEQ], 2) PSEQ [ MODEL1204280024 - M4_K2_PSEQ], 3) QSS_USEQ [ MODEL1204280036 - M4_K2_QSS_USEQ] and 4) QSS_PSEQ [ MODEL1204280040 - M4_K2_QSS_PSEQ] are available from the curated branch. The remaining 36 models can be accessed from the non-curated branch.
This model [ MODEL1204280024 - M4_K2_PSEQ] correspond to type M4 with mass-action kinetics K2, in PSEQ (sequestrated ) condition. .
BACKGROUND: The three layer mitogen activated protein kinase (MAPK) signaling cascade exhibits different designs of interactions between its kinases and phosphatases. While the sequential interactions between the three kinases of the cascade are tightly preserved, the phosphatases of the cascade, such as MKP3 and PP2A, exhibit relatively diverse interactions with their substrate kinases. Additionally, the kinases of the MAPK cascade can also sequester their phosphatases. Thus, each topologically distinct interaction design of kinases and phosphatases could exhibit unique signal processing characteristics, and the presence of phosphatase sequestration may lead to further fine tuning of the propagated signal.
RESULTS: We have built four models of the MAPK cascade, each model with identical kinase-kinase interactions but unique kinases-phosphatases interactions. Our simulations unravelled that MAPK cascade's robustness to external perturbations is a function of nature of interaction between its kinases and phosphatases. The cascade's output robustness was enhanced when phosphatases were sequestrated by their target kinases. We uncovered a novel implicit/hidden negative feedback loop from the phosphatase MKP3 to its upstream kinase Raf-1, in a cascade resembling the B cell MAPK cascade. Notably, strength of the feedback loop was reciprocal to the strength of phosphatases' sequestration and stronger sequestration abolished the feedback loop completely. An experimental method to verify the presence of the feedback loop is also proposed. We further showed, when the models were activated by transient signal, memory (total time taken by the cascade output to reach its unstimulated level after removal of signal) of a cascade was determined by the specific designs of interaction among its kinases and phosphatases.
CONCLUSIONS: Differences in interaction designs among the kinases and phosphatases can differentially shape the robustness and signal response behaviour of the MAPK cascade and phosphatase sequestration dramatically enhances the robustness to perturbations in each of the cascade. An implicit negative feedback loop was uncovered from our analysis and we found that strength of the negative feedback loop is reciprocally related to the strength of phosphatase sequestration. Duration of output phosphorylation in response to a transient signal was also found to be determined by the individual cascade's kinase-phosphatase interaction design.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
Sarma2012 - Interaction topologies of MAPK cascade (M4_K2_QSS_USEQ)
The paper presents the various interaction topologies between the kinases and phosphatases of MAPK cascade. They are represented as M1, M2, M3 and M4. The kinases of the cascades are MKKK, MKK and MK, and Phos1, Phos2 and Phos3 are phosphatases of the system. All three kinases in a M1 type network have specific phosphatases Phos1, Phos2 and Phos3 for the dephosphorylation process. In a M2 type system, kinases MKKK and MKK are dephosphorylated by Phos1 and MK is dephosphorylated by Phos2. The architecture of system like M3 is such that MKKK gets dephosphorylated by Phos1, whereas Phos2 dephosphorylates both MKK and MK. Finally, the MAPK cascade exhibiting more complex design of interaction such as M4 is such that MKKK and MKK are dephosphorylated by Phos1 whereas MKK and MK are dephosphorylated by Phos2. In addition, as it is plausible that the kinases can sequester their respective phosphatases by binding to them, this is considered in the design of the systems (PSEQ-sequestrated system; USEQ-Unsequestrated system). The robustness of different interaction designs of the systems is checked, considering both MichaelisMenten type kinetics (K1) and elementary mass action kinetics (K2). In the living systems, the MAPK cascade transmit both short and long duration signals where short duration signals trigger proliferation and long duration signals trigger cell differentiation. These signal variants are considered to interpret the systems behaviour. It is also tested how the robustness and signal response behaviour of K2 models are affected when K2 assumes quasi steady state (QSS). The combinations of the above variants resulted in 40 models (MODEL1204280001-MODEL1204280040). All these 40 models are available from BioModels Database .
Models that correspond to type M4 with mass-action kinetics K2, in four condition 1) USEQ [ MODEL1204280020 - M4_K2_USEQ], 2) PSEQ [ MODEL1204280024 - M4_K2_PSEQ], 3) QSS_USEQ [ MODEL1204280036 - M4_K2_QSS_USEQ] and 4) QSS_PSEQ [ MODEL1204280040 - M4_K2_QSS_PSEQ] are available from the curated branch. The remaining 36 models can be accessed from the non-curated branch.
This model [ MODEL1204280036 - M4_K2_QSS_USEQ] correspond to type M4 with mass-action kinetics K2, in QSS (quasi steady state) and USEQ (Unsequestrated ) condition. .
BACKGROUND: The three layer mitogen activated protein kinase (MAPK) signaling cascade exhibits different designs of interactions between its kinases and phosphatases. While the sequential interactions between the three kinases of the cascade are tightly preserved, the phosphatases of the cascade, such as MKP3 and PP2A, exhibit relatively diverse interactions with their substrate kinases. Additionally, the kinases of the MAPK cascade can also sequester their phosphatases. Thus, each topologically distinct interaction design of kinases and phosphatases could exhibit unique signal processing characteristics, and the presence of phosphatase sequestration may lead to further fine tuning of the propagated signal.
RESULTS: We have built four models of the MAPK cascade, each model with identical kinase-kinase interactions but unique kinases-phosphatases interactions. Our simulations unravelled that MAPK cascade's robustness to external perturbations is a function of nature of interaction between its kinases and phosphatases. The cascade's output robustness was enhanced when phosphatases were sequestrated by their target kinases. We uncovered a novel implicit/hidden negative feedback loop from the phosphatase MKP3 to its upstream kinase Raf-1, in a cascade resembling the B cell MAPK cascade. Notably, strength of the feedback loop was reciprocal to the strength of phosphatases' sequestration and stronger sequestration abolished the feedback loop completely. An experimental method to verify the presence of the feedback loop is also proposed. We further showed, when the models were activated by transient signal, memory (total time taken by the cascade output to reach its unstimulated level after removal of signal) of a cascade was determined by the specific designs of interaction among its kinases and phosphatases.
CONCLUSIONS: Differences in interaction designs among the kinases and phosphatases can differentially shape the robustness and signal response behaviour of the MAPK cascade and phosphatase sequestration dramatically enhances the robustness to perturbations in each of the cascade. An implicit negative feedback loop was uncovered from our analysis and we found that strength of the negative feedback loop is reciprocally related to the strength of phosphatase sequestration. Duration of output phosphorylation in response to a transient signal was also found to be determined by the individual cascade's kinase-phosphatase interaction design.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
Sarma2012 - Interaction topologies of MAPK cascade (M4_K2_QSS_PSEQ)
The paper presents the various interaction topologies between the kinases and phosphatases of MAPK cascade. They are represented as M1, M2, M3 and M4. The kinases of the cascades are MKKK, MKK and MK, and Phos1, Phos2 and Phos3 are phosphatases of the system. All three kinases in a M1 type network have specific phosphatases Phos1, Phos2 and Phos3 for the dephosphorylation process. In a M2 type system, kinases MKKK and MKK are dephosphorylated by Phos1 and MK is dephosphorylated by Phos2. The architecture of system like M3 is such that MKKK gets dephosphorylated by Phos1, whereas Phos2 dephosphorylates both MKK and MK. Finally, the MAPK cascade exhibiting more complex design of interaction such as M4 is such that MKKK and MKK are dephosphorylated by Phos1 whereas MKK and MK are dephosphorylated by Phos2. In addition, as it is plausible that the kinases can sequester their respective phosphatases by binding to them, this is considered in the design of the systems (PSEQ-sequestrated system; USEQ-Unsequestrated system). The robustness of different interaction designs of the systems is checked, considering both MichaelisMenten type kinetics (K1) and elementary mass action kinetics (K2). In the living systems, the MAPK cascade transmit both short and long duration signals where short duration signals trigger proliferation and long duration signals trigger cell differentiation. These signal variants are considered to interpret the systems behaviour. It is also tested how the robustness and signal response behaviour of K2 models are affected when K2 assumes quasi steady state (QSS). The combinations of the above variants resulted in 40 models (MODEL1204280001-MODEL1204280040). All these 40 models are available from BioModels Database .
Models that correspond to type M4 with mass-action kinetics K2, in four condition 1) USEQ [ MODEL1204280020 - M4_K2_USEQ], 2) PSEQ [ MODEL1204280024 - M4_K2_PSEQ], 3) QSS_USEQ [ MODEL1204280036 - M4_K2_QSS_USEQ] and 4) QSS_PSEQ [ MODEL1204280040 - M4_K2_QSS_PSEQ] are available from the curated branch. The remaining 36 models can be accessed from the non-curated branch.
This model [ MODEL1204280040 - M4_K2_QSS_PSEQ] correspond to type M4 with mass-action kinetics K2, in QSS (quasi steady state) and USEQ (Unsequestrated ) condition. .
BACKGROUND: The three layer mitogen activated protein kinase (MAPK) signaling cascade exhibits different designs of interactions between its kinases and phosphatases. While the sequential interactions between the three kinases of the cascade are tightly preserved, the phosphatases of the cascade, such as MKP3 and PP2A, exhibit relatively diverse interactions with their substrate kinases. Additionally, the kinases of the MAPK cascade can also sequester their phosphatases. Thus, each topologically distinct interaction design of kinases and phosphatases could exhibit unique signal processing characteristics, and the presence of phosphatase sequestration may lead to further fine tuning of the propagated signal.
RESULTS: We have built four models of the MAPK cascade, each model with identical kinase-kinase interactions but unique kinases-phosphatases interactions. Our simulations unravelled that MAPK cascade's robustness to external perturbations is a function of nature of interaction between its kinases and phosphatases. The cascade's output robustness was enhanced when phosphatases were sequestrated by their target kinases. We uncovered a novel implicit/hidden negative feedback loop from the phosphatase MKP3 to its upstream kinase Raf-1, in a cascade resembling the B cell MAPK cascade. Notably, strength of the feedback loop was reciprocal to the strength of phosphatases' sequestration and stronger sequestration abolished the feedback loop completely. An experimental method to verify the presence of the feedback loop is also proposed. We further showed, when the models were activated by transient signal, memory (total time taken by the cascade output to reach its unstimulated level after removal of signal) of a cascade was determined by the specific designs of interaction among its kinases and phosphatases.
CONCLUSIONS: Differences in interaction designs among the kinases and phosphatases can differentially shape the robustness and signal response behaviour of the MAPK cascade and phosphatase sequestration dramatically enhances the robustness to perturbations in each of the cascade. An implicit negative feedback loop was uncovered from our analysis and we found that strength of the negative feedback loop is reciprocally related to the strength of phosphatase sequestration. Duration of output phosphorylation in response to a transient signal was also found to be determined by the individual cascade's kinase-phosphatase interaction design.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
Lipid metabolism has a key role to play in human longevity and healthy aging. A whole-body mathematical model of cholesterol metabolism that explores the changes in both the rate of intestinal cholesterol absorption and the hepatic rate of clearance of LDL-C from the plasma, has been presented here. The model showed that of these two mechanisms, changes to the rate of LDL-C removal from the plasma with age had the most significant effect on cholesterol metabolism.
The original SBML model file was generated using MathSBML 2.5.1.
BACKGROUND: Global demographic changes have stimulated marked interest in the process of ageing. There has been, and will continue to be, an unrelenting rise in the number of the oldest old ( >85 years of age). Together with an ageing population there comes an increase in the prevalence of age related disease. Of the diseases of ageing, cardiovascular disease (CVD) has by far the highest prevalence. It is regarded that a finely tuned lipid profile may help to prevent CVD as there is a long established relationship between alterations to lipid metabolism and CVD risk. In fact elevated plasma cholesterol, particularly Low Density Lipoprotein Cholesterol (LDL-C) has consistently stood out as a risk factor for having a cardiovascular event. Moreover it is widely acknowledged that LDL-C may rise with age in both sexes in a wide variety of groups. The aim of this work was to use a whole-body mathematical model to investigate why LDL-C rises with age, and to test the hypothesis that mechanistic changes to cholesterol absorption and LDL-C removal from the plasma are responsible for the rise. The whole-body mechanistic nature of the model differs from previous models of cholesterol metabolism which have either focused on intracellular cholesterol homeostasis or have concentrated on an isolated area of lipoprotein dynamics. The model integrates both current and previously published data relating to molecular biology, physiology, ageing and nutrition in an integrated fashion.
RESULTS: The model was used to test the hypothesis that alterations to the rate of cholesterol absorption and changes to the rate of removal of LDL-C from the plasma are integral to understanding why LDL-C rises with age. The model demonstrates that increasing the rate of intestinal cholesterol absorption from 50% to 80% by age 65 years can result in an increase of LDL-C by as much as 34mg/dL in a hypothetical male subject. The model also shows that decreasing the rate of hepatic clearance of LDL-C gradually to 50% by age 65 years can result in an increase of LDL-C by as much as 116mg/dL.
CONCLUSIONS: Our model clearly demonstrates that of the two putative mechanisms that have been implicated in the dysregulation of cholesterol metabolism with age, alterations to the removal rate of plasma LDL-C has the most significant impact on cholesterol metabolism and small changes to the number of hepatic LDL receptors can result in a significant rise in LDL-C. This first whole-body systems based model of cholesterol balance could potentially be used as a tool to further improve our understanding of whole-body cholesterol metabolism and its dysregulation with age. Furthermore, given further fine tuning the model may help to investigate potential dietary and lifestyle regimes that have the potential to mitigate the effects aging has on cholesterol metabolism.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
deBack2012 - Lineage Specification in Pancreas Development
This model of two neighbouring pancreas precursor cells, describes the exocrine versus endocrine lineage specification process. To account for the tissue scale patterns, this couplet model has been extended to hundreds of coupled cells.
J. R. Soc. Interface 6 February 2013 vol. 10 no. 79 20120766
Abstract:
The cell fate decision of multi-potent pancreatic progenitor cells between the exocrine and endocrine lineages is regulated by Notch signalling, mediated by cell\u2013cell interactions. However, canonical models of Notch-mediated lateral inhibition cannot explain the scattered spatial distribution of endocrine cells and the cell-type ratio in the developing pancreas. Based on evidence from acinar-to-islet cell transdifferentiation in vitro, we propose that lateral stabilization, i.e. positive feedback between adjacent progenitor cells, acts in parallel with lateral inhibition to regulate pattern formation in the pancreas. A simple mathematical model of transcriptional regulation and cell\u2013cell interaction reveals the existence of multi-stability of spatial patterns whose simultaneous occurrence causes scattering of endocrine cells in the presence of noise. The scattering pattern allows for control of the endocrine-to-exocrine cell-type ratio by modulation of lateral stabilization strength. These theoretical results suggest a previously unrecognized role for lateral stabilization in lineage specification, spatial patterning and cell-type ratio control in organ development.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
Gupta S, Maurya MR, Stephens DL, Dennis EA, Subramaniam S.
Biophys. J. 2009 Jun; 96(11):4542-51.
Abstract:
There is increasing evidence for a major and critical involvement of lipids in signal transduction and cellular trafficking, and this has motivated large-scale studies on lipid pathways. The Lipid Metabolites and Pathways Strategy consortium is actively investigating lipid metabolism in mammalian cells and has made available time-course data on various lipids in response to treatment with KDO(2)-lipid A (a lipopolysaccharide analog) of macrophage RAW 264.7 cells. The lipids known as eicosanoids play an important role in inflammation. We have reconstructed an integrated network of eicosanoid metabolism and signaling based on the KEGG pathway database and the literature and have developed a kinetic model. A matrix-based approach was used to estimate the rate constants from experimental data and these were further refined using generalized constrained nonlinear optimization. The resulting model fits the experimental data well for all species, and simulated enzyme activities were similar to their literature values. The quantitative model for eicosanoid metabolism that we have developed can be used to design experimental studies utilizing genetic and pharmacological perturbations to probe fluxes in lipid pathways.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
A comprehensive model of the circardian clock of fungal Neurospora crassa , which encompasses existing knowledge of the biochemistry of Neurospora clock, is described by Tseng et al. (2012). The model is validated against a wide range of experimental phenotypes and has been used to investigate possible molecular explanations of temperature compensation.
Circadian clocks provide an internal measure of external time allowing organisms to anticipate and exploit predictable daily changes in the environment. Rhythms driven by circadian clocks have a temperature compensated periodicity of approximately 24 hours that persists in constant conditions and can be reset by environmental time cues. Computational modelling has aided our understanding of the molecular mechanisms of circadian clocks, nevertheless it remains a major challenge to integrate the large number of clock components and their interactions into a single, comprehensive model that is able to account for the full breadth of clock phenotypes. Here we present a comprehensive dynamic model of the Neurospora crassa circadian clock that incorporates its key components and their transcriptional and post-transcriptional regulation. The model accounts for a wide range of clock characteristics including: a periodicity of 21.6 hours, persistent oscillation in constant conditions, arrhythmicity in constant light, resetting by brief light pulses, and entrainment to full photoperiods. Crucial components influencing the period and amplitude of oscillations were identified by control analysis. Furthermore, simulations enabled us to propose a mechanism for temperature compensation, which is achieved by simultaneously increasing the translation of frq RNA and decreasing the nuclear import of FRQ protein.
Figure 3 of the reference publication has been reproduced using Copasi 4.8 (Build 35).
To the extent possible under law, all copyright and related orneighbouring rights to this encoded model have been dedicated to the publicdomain worldwide. Please refer to CC0 Public DomainDedication for more information.
Saeidi2012 - Quorum sensing device that produces GFP
Saeidi et al. (2012) has modelled a quorum sensing device that produces green fluorescent protein (GFP) as reporter in the presence of Acyl Homoserine Lactone (AHL).
Nazanin Saeidi, Mohamed Arshath, Matthew Wook Chang, Chueh Loo Poh
Chemical Engineering Science. December 2012.
Abstract:
Modeling of biological parts is of crucial importance as it enables the in silico study of synthetic biological systems prior to the actual construction of genetic circuits, which can be time consuming and costly. Because standard biological parts are utilized to build the synthetic systems, it is important that each of these standard parts is well characterized and has a corresponding mathematical model that could simulate the characteristics of the part. These models could be used in computer aided design (CAD) tools during the design stage to facilitate the building of the model of biological systems. This paper describes the development of a mathematical model that is able to simulate both the dynamic and static performance of a biological device created using standard parts. We modeled an example quorum sensing device that produces green fluorescent protein (GFP) as reporter in the presence of Acyl Homoserine Lactone (AHL). The parameters of the model were estimated using experimental results. The simulation results show that the model was able to simulate behavior similar to experimental results. Since it is important that these models and the content in the models can be searchable and readable by machines, standard SBML (system biology markup language) format was used to store the models. All parts and reactions are fully annotated to enable easy searching, and the models follow the Minimum Information Requested In the Annotation of Models (MIRIAM) compliance as well as the Minimum Information About a Simulation Experiment (MIASE).
Figure 4a of the reference publication has been reproduced as curation figure. The plot shows the performance of the model at different concentrations of the inducer (3OC12HSL=5E-10, 5E-07, 5E-07).
To the extent possible under law, all copyright and related orneighbouring rights to this encoded model have been dedicated to the publicdomain worldwide. Please refer to CC0 Public DomainDedication for more information.
Smith B, Hill C, Godfrey EL, Rand D, van den Berg H, Thornton S, Hodgkin M, Davey J, Ladds G.
Cell Signal. 2009 Jul;21(7):1151-60.
Abstract:
G protein-coupled receptors (GPCRs) regulate a variety of intracellular pathways through their ability to promote the binding of GTP to heterotrimeric G proteins. Regulator of G protein signaling (RGS) proteins increases the intrinsic GTPase activity of Galpha-subunits and are widely regarded as negative regulators of G protein signaling. Using yeast we demonstrate that GTP hydrolysis is not only required for desensitization, but is essential for achieving a high maximal (saturated level) response. Thus RGS-mediated GTP hydrolysis acts as both a negative (low stimulation) and positive (high stimulation) regulator of signaling. To account for this we generated a new kinetic model of the G protein cycle where Galpha(GTP) enters an inactive GTP-bound state following effector activation. Furthermore, in vivo and in silico experimentation demonstrates that maximum signaling output first increases and then decreases with RGS concentration. This unimodal, non-monotone dependence on RGS concentration is novel. Analysis of the kinetic model has revealed a dynamic network motif that shows precisely how inclusion of the inactive GTP-bound state for the Galpha produces this unimodal relationship.
To reproduce dose-response plots in the publication, the model is simulated with 12 different concentrations (see parameter Ligand_conc). For each concentration, a single value must be obtained from the integral of the trajectory of species z3 from time=0 to time=30. These values are then used to build a dose-response plot (authors used GraphPad Prism). Mutant strains are simulated with alternative parameter values or initial conditions in Table S3.
To cite BioModels Database, please use: BioModels Database: An enhanced, curated and annotated resource for published quantitative kinetic models. PMID: 20587024 .
To the extent possible under law, all copyright and related orneighbouring rights to this encoded model have been dedicated to the publicdomain worldwide. Please refer to CC0 Public DomainDedication for more information.
Two plausible designs (S1 and S2) of coupled positive and negative feedback loops of MAPK cascade has been described in this paper. This model corresponds to model S1 that comprises negative feedback from MK-PP to MKKK-P layer coupled to positive feedback from MK-PP to MKK-PP layer.
BACKGROUND: Feedback loops, both positive and negative are embedded in the Mitogen Activated Protein Kinase (MAPK) cascade. In the three layer MAPK cascade, both feedback loops originate from the terminal layer and their sites of action are either of the two upstream layers. Recent studies have shown that the cascade uses coupled positive and negative feedback loops in generating oscillations. Two plausible designs of coupled positive and negative feedback loops can be elucidated from the literature; in one design the positive feedback precedes the negative feedback in the direction of signal flow and vice-versa in another. But it remains unexplored how the two designs contribute towards triggering oscillations in MAPK cascade. Thus it is also not known how amplitude, frequency, robustness or nature (analogous/digital) of the oscillations would be shaped by these two designs.
RESULTS: We built two models of MAPK cascade that exhibited oscillations as function of two underlying designs of coupled positive and negative feedback loops. Frequency, amplitude and nature (digital/analogous) of oscillations were found to be differentially determined by each design. It was observed that the positive feedback emerging from an oscillating MAPK cascade and functional in an external signal processing module can trigger oscillations in the target module, provided that the target module satisfy certain parametric requirements. The augmentation of the two models was done to incorporate the nuclear-cytoplasmic shuttling of cascade components followed by induction of a nuclear phosphatase. It revealed that the fate of oscillations in the MAPK cascade is governed by the feedback designs. Oscillations were unaffected due to nuclear compartmentalization owing to one design but were completely abolished in the other case.
CONCLUSION: The MAPK cascade can utilize two distinct designs of coupled positive and negative feedback loops to trigger oscillations. The amplitude, frequency and robustness of the oscillations in presence or absence of nuclear compartmentalization were differentially determined by two designs of coupled positive and negative feedback loops. A positive feedback from an oscillating MAPK cascade was shown to induce oscillations in an external signal processing module, uncovering a novel regulatory aspect of MAPK signal processing.
To the extent possible under law, all copyright and related orneighbouring rights to this encoded model have been dedicated to the publicdomain worldwide. Please refer to CC0 Public DomainDedication for more information.
Two plausible designs (S1 and S2) of coupled positive and negative feedback loops of MAPK cascade has been described in this paper. This model corresponds to model S2 that comprises negative feedback from MK-PP to MKK_PP layer coupled to positive feedback from MK-PP to MKKK-P layer.
BACKGROUND: Feedback loops, both positive and negative are embedded in the Mitogen Activated Protein Kinase (MAPK) cascade. In the three layer MAPK cascade, both feedback loops originate from the terminal layer and their sites of action are either of the two upstream layers. Recent studies have shown that the cascade uses coupled positive and negative feedback loops in generating oscillations. Two plausible designs of coupled positive and negative feedback loops can be elucidated from the literature; in one design the positive feedback precedes the negative feedback in the direction of signal flow and vice-versa in another. But it remains unexplored how the two designs contribute towards triggering oscillations in MAPK cascade. Thus it is also not known how amplitude, frequency, robustness or nature (analogous/digital) of the oscillations would be shaped by these two designs.
RESULTS: We built two models of MAPK cascade that exhibited oscillations as function of two underlying designs of coupled positive and negative feedback loops. Frequency, amplitude and nature (digital/analogous) of oscillations were found to be differentially determined by each design. It was observed that the positive feedback emerging from an oscillating MAPK cascade and functional in an external signal processing module can trigger oscillations in the target module, provided that the target module satisfy certain parametric requirements. The augmentation of the two models was done to incorporate the nuclear-cytoplasmic shuttling of cascade components followed by induction of a nuclear phosphatase. It revealed that the fate of oscillations in the MAPK cascade is governed by the feedback designs. Oscillations were unaffected due to nuclear compartmentalization owing to one design but were completely abolished in the other case.
CONCLUSION: The MAPK cascade can utilize two distinct designs of coupled positive and negative feedback loops to trigger oscillations. The amplitude, frequency and robustness of the oscillations in presence or absence of nuclear compartmentalization were differentially determined by two designs of coupled positive and negative feedback loops. A positive feedback from an oscillating MAPK cascade was shown to induce oscillations in an external signal processing module, uncovering a novel regulatory aspect of MAPK signal processing.
To the extent possible under law, all copyright and related orneighbouring rights to this encoded model have been dedicated to the publicdomain worldwide. Please refer to CC0 Public DomainDedication for more information.
Sarma2012 - Oscillations in MAPK cascade (S2), inclusion of external signalling module
Two plausible designs (S1 and S2) of coupled positive and negative feedback loops of MAPK cascade has been described in this paper. This model corresponds to model S2 that comprises negative feedback from MK-PP to MKKK-P layer coupled to positive feedback from MK-PP to MKK-PP layer. In addition, a positive feedback loop from S2 to the phosphorylation step of Kinase X has been introduced.
BACKGROUND: Feedback loops, both positive and negative are embedded in the Mitogen Activated Protein Kinase (MAPK) cascade. In the three layer MAPK cascade, both feedback loops originate from the terminal layer and their sites of action are either of the two upstream layers. Recent studies have shown that the cascade uses coupled positive and negative feedback loops in generating oscillations. Two plausible designs of coupled positive and negative feedback loops can be elucidated from the literature; in one design the positive feedback precedes the negative feedback in the direction of signal flow and vice-versa in another. But it remains unexplored how the two designs contribute towards triggering oscillations in MAPK cascade. Thus it is also not known how amplitude, frequency, robustness or nature (analogous/digital) of the oscillations would be shaped by these two designs.
RESULTS: We built two models of MAPK cascade that exhibited oscillations as function of two underlying designs of coupled positive and negative feedback loops. Frequency, amplitude and nature (digital/analogous) of oscillations were found to be differentially determined by each design. It was observed that the positive feedback emerging from an oscillating MAPK cascade and functional in an external signal processing module can trigger oscillations in the target module, provided that the target module satisfy certain parametric requirements. The augmentation of the two models was done to incorporate the nuclear-cytoplasmic shuttling of cascade components followed by induction of a nuclear phosphatase. It revealed that the fate of oscillations in the MAPK cascade is governed by the feedback designs. Oscillations were unaffected due to nuclear compartmentalization owing to one design but were completely abolished in the other case.
CONCLUSION: The MAPK cascade can utilize two distinct designs of coupled positive and negative feedback loops to trigger oscillations. The amplitude, frequency and robustness of the oscillations in presence or absence of nuclear compartmentalization were differentially determined by two designs of coupled positive and negative feedback loops. A positive feedback from an oscillating MAPK cascade was shown to induce oscillations in an external signal processing module, uncovering a novel regulatory aspect of MAPK signal processing.
To the extent possible under law, all copyright and related orneighbouring rights to this encoded model have been dedicated to the publicdomain worldwide. Please refer to CC0 Public DomainDedication for more information.
Two plausible designs (S1 and S2) of coupled positive and negative feedback loops of MAPK cascade has been described in this paper. Further these models were extended to S1n and S2n, to incorporate the nuclear-cytoplasmic translocation of the MK layer components of the cascade. This model corresponds to model S1n that comprises negative feedback from MK-PP to MKKK-P layer coupled to positive feedback from MK-PP to MKK-PP layer, with the inclusion of nuclear-cytoplasmic translocation.
BACKGROUND: Feedback loops, both positive and negative are embedded in the Mitogen Activated Protein Kinase (MAPK) cascade. In the three layer MAPK cascade, both feedback loops originate from the terminal layer and their sites of action are either of the two upstream layers. Recent studies have shown that the cascade uses coupled positive and negative feedback loops in generating oscillations. Two plausible designs of coupled positive and negative feedback loops can be elucidated from the literature; in one design the positive feedback precedes the negative feedback in the direction of signal flow and vice-versa in another. But it remains unexplored how the two designs contribute towards triggering oscillations in MAPK cascade. Thus it is also not known how amplitude, frequency, robustness or nature (analogous/digital) of the oscillations would be shaped by these two designs.
RESULTS: We built two models of MAPK cascade that exhibited oscillations as function of two underlying designs of coupled positive and negative feedback loops. Frequency, amplitude and nature (digital/analogous) of oscillations were found to be differentially determined by each design. It was observed that the positive feedback emerging from an oscillating MAPK cascade and functional in an external signal processing module can trigger oscillations in the target module, provided that the target module satisfy certain parametric requirements. The augmentation of the two models was done to incorporate the nuclear-cytoplasmic shuttling of cascade components followed by induction of a nuclear phosphatase. It revealed that the fate of oscillations in the MAPK cascade is governed by the feedback designs. Oscillations were unaffected due to nuclear compartmentalization owing to one design but were completely abolished in the other case.
CONCLUSION: The MAPK cascade can utilize two distinct designs of coupled positive and negative feedback loops to trigger oscillations. The amplitude, frequency and robustness of the oscillations in presence or absence of nuclear compartmentalization were differentially determined by two designs of coupled positive and negative feedback loops. A positive feedback from an oscillating MAPK cascade was shown to induce oscillations in an external signal processing module, uncovering a novel regulatory aspect of MAPK signal processing.
To the extent possible under law, all copyright and related orneighbouring rights to this encoded model have been dedicated to the publicdomain worldwide. Please refer to CC0 Public DomainDedication for more information.
Two plausible designs (S1 and S2) of coupled positive and negative feedback loops of MAPK cascade has been described in this paper. Further these models were extended to S1n and S2n, to incorporate the nuclear-cytoplasmic translocation of the MK layer components of the cascade. This model corresponds to model S2n that comprises negative feedback from MK-PP to MKK-PP layer coupled to positive feedback from MK-PP to MKKK-PP layer, with the inclusion of nuclear-cytoplasmic translocation.
BACKGROUND: Feedback loops, both positive and negative are embedded in the Mitogen Activated Protein Kinase (MAPK) cascade. In the three layer MAPK cascade, both feedback loops originate from the terminal layer and their sites of action are either of the two upstream layers. Recent studies have shown that the cascade uses coupled positive and negative feedback loops in generating oscillations. Two plausible designs of coupled positive and negative feedback loops can be elucidated from the literature; in one design the positive feedback precedes the negative feedback in the direction of signal flow and vice-versa in another. But it remains unexplored how the two designs contribute towards triggering oscillations in MAPK cascade. Thus it is also not known how amplitude, frequency, robustness or nature (analogous/digital) of the oscillations would be shaped by these two designs.
RESULTS: We built two models of MAPK cascade that exhibited oscillations as function of two underlying designs of coupled positive and negative feedback loops. Frequency, amplitude and nature (digital/analogous) of oscillations were found to be differentially determined by each design. It was observed that the positive feedback emerging from an oscillating MAPK cascade and functional in an external signal processing module can trigger oscillations in the target module, provided that the target module satisfy certain parametric requirements. The augmentation of the two models was done to incorporate the nuclear-cytoplasmic shuttling of cascade components followed by induction of a nuclear phosphatase. It revealed that the fate of oscillations in the MAPK cascade is governed by the feedback designs. Oscillations were unaffected due to nuclear compartmentalization owing to one design but were completely abolished in the other case.
CONCLUSION: The MAPK cascade can utilize two distinct designs of coupled positive and negative feedback loops to trigger oscillations. The amplitude, frequency and robustness of the oscillations in presence or absence of nuclear compartmentalization were differentially determined by two designs of coupled positive and negative feedback loops. A positive feedback from an oscillating MAPK cascade was shown to induce oscillations in an external signal processing module, uncovering a novel regulatory aspect of MAPK signal processing.
To the extent possible under law, all copyright and related orneighbouring rights to this encoded model have been dedicated to the publicdomain worldwide. Please refer to CC0 Public DomainDedication for more information.
Pokhilko2013 - TOC1 signalling in Arabidopsiscircadian clock
In this model, Pokhilko et al. has incorporated the negative transcriptional regulations of the core clock genes by TOC1 and the up-regulation of TOC1 expression by ABA signalling, to their previous model BIOMD0000000412
BACKGROUND: 24-hour biological clocks are intimately connected to the cellular signalling network, which complicates the analysis of clock mechanisms. The transcriptional regulator TOC1 (TIMING OF CAB EXPRESSION 1) is a founding component of the gene circuit in the plant circadian clock. Recent results show that TOC1 suppresses transcription of multiple target genes within the clock circuit, far beyond its previously-described regulation of the morning transcription factors LHY (LATE ELONGATED HYPOCOTYL) and CCA1 (CIRCADIAN CLOCK ASSOCIATED 1). It is unclear how this pervasive effect of TOC1 affects the dynamics of the clock and its outputs. TOC1 also appears to function in a nested feedback loop that includes signalling by the plant hormone Abscisic Acid (ABA), which is upregulated by abiotic stresses, such as drought. ABA treatments both alter TOC1 levels and affect the clock's timing behaviour. Conversely, the clock rhythmically modulates physiological processes induced by ABA, such as the closing of stomata in the leaf epidermis. In order to understand the dynamics of the clock and its outputs under changing environmental conditions, the reciprocal interactions between the clock and other signalling pathways must be integrated. RESULTS: We extended the mathematical model of the plant clock gene circuit by incorporating the repression of multiple clock genes by TOC1, observed experimentally. The revised model more accurately matches the data on the clock's molecular profiles and timing behaviour, explaining the clock's responses in TOC1 over-expression and toc1 mutant plants. A simplified representation of ABA signalling allowed us to investigate the interactions of ABA and circadian pathways. Increased ABA levels lengthen the free-running period of the clock, consistent with the experimental data. Adding stomatal closure to the model, as a key ABA- and clock-regulated downstream process allowed to describe TOC1 effects on the rhythmic gating of stomatal closure. CONCLUSIONS: The integrated model of the circadian clock circuit and ABA-regulated environmental sensing allowed us to explain multiple experimental observations on the timing and stomatal responses to genetic and environmental perturbations. These results crystallise a new role of TOC1 as an environmental sensor, which both affects the pace of the central oscillator and modulates the kinetics of downstream processes.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
BACKGROUND: The unfolded protein response (UPR) is a major signalling cascade acting in the quality control ofprotein folding in the endoplasmic reticulum (ER). The cascade is known to play an accessory rolein a range of genetic and environmental disorders including neurodegenerative and cardiovasculardiseases, diabetes and kidney diseases. The three major receptors of the ER stress involved withthe UPR, i.e. IRE1a, PERK and ATF6, signal through a complex web of pathways to convey anappropriate response. The emerging behaviour ranges from adaptive to maladaptive depending on theseverity of unfolded protein accumulation in the ER; however, the decision mechanism for the switchand its timing have so far been poorly understood.
RESULTS:Here, we propose a mechanism by which the UPR outcome switches between survival and death.We compose a mathematical model integrating the three signalling branches, and perform a comprehensivebifurcation analysis to investigate possible responses to stimuli. The analysis reveals threedistinct states of behaviour, low, high and intermediate activity, associated with stress adaptation, tolerance,and the initiation of apoptosis. The decision to adapt or destruct can, therefore, be understoodas a dynamic process where the balance between the stress and the folding capacity of the ER playsa pivotal role in managing the delivery of the most appropriate response. The model demonstratesfor the first time that the UPR is capable of generating oscillations in translation attenuation and theapoptotic signals, and this is supplemented with a Bayesian sensitivity analysis identifying a set ofparameters controlling this behaviour.
CONCLUSIONS:This work contributes largely to the understanding of one of the most ubiquitous signalling pathwaysinvolved in protein folding quality control in the metazoan ER. The insights gained have direct consequenceson the management of many UPR-related diseases, revealing, in addition, an extended listof candidate disease modifiers. Demonstration of stress adaptation sheds light to how preconditioningmight be beneficial in manifesting the UPR outcome to prevent untimely apoptosis, and paves the wayto novel approaches for the treatment of many UPR-related conditions.
In the paper, PERKA refers to the amount of phosphorylated PERK monomer. However, it refers to the active complex in the model. The complex with the model parameterization is formed of 4 monomers (n=4). So, the value of PERKA should be multiplied by 4, in order to generate the figures in the paper (eg. Figure 12).
An additional parameter (tmr=10)) is used in the model. This parameter is not mentioned in the paper. The model values of kf(=10) and kr(=1) are not consistent with that of the paper (kf=100, kr=10, in the paper). However, this is corrected by the introduction of \"tmr\" in the model, which is multiplied with kf and kr to get the resulting values.
The term \"tmr\" was missing in the kinetic laws of the reactions reu7 and reu8, in the original model. This has been corrected as per the author's request.
To the extent possible under law, all copyright and related orneighbouring rights to this encoded model have been dedicated to the publicdomain worldwide. Please refer to CC0 Public DomainDedication for more information.
Venkatraman2012 - Interplay between PLS and TSP1 in TGF-\u03b21 activation
The interplay between PLS (Plasmin) and TSP1 (Thrombospondin-1) in TGF-\u03b21 (Transforming growth factor-\u03b21)is shown using mathematical modelling and in vitro experimentents.
Venkatraman L, Chia SM, Narmada BC, White JK, Bhowmick SS, Forbes Dewey C Jr, So PT, Tucker-Kellogg L, Yu H.
Biophys J. 2012 Sep 5;103(5):1060-8.
Abstract:
Transforming growth factor-\u03b21 (TGF-\u03b21) is a potent regulator of extracellular matrix production, wound healing, differentiation, and immune response, and is implicated in the progression of fibrotic diseases and cancer. Extracellular activation of TGF-\u03b21 from its latent form provides spatiotemporal control over TGF-\u03b21 signaling, but the current understanding of TGF-\u03b21 activation does not emphasize cross talk between activators. Plasmin (PLS) and thrombospondin-1 (TSP1) have been studied individually as activators of TGF-\u03b21, and in this work we used a systems-level approach with mathematical modeling and in vitro experiments to study the interplay between PLS and TSP1 in TGF-\u03b21 activation. Simulations and steady-state analysis predicted a switch-like bistable transition between two levels of active TGF-\u03b21, with an inverse correlation between PLS and TSP1. In particular, the model predicted that increasing PLS breaks a TSP1-TGF-\u03b21 positive feedback loop and causes an unexpected net decrease in TGF-\u03b21 activation. To test these predictions in vitro, we treated rat hepatocytes and hepatic stellate cells with PLS, which caused proteolytic cleavage of TSP1 and decreased activation of TGF-\u03b21. The TGF-\u03b21 activation levels showed a cooperative dose response, and a test of hysteresis in the cocultured cells validated that TGF-\u03b21 activation is bistable. We conclude that switch-like behavior arises from natural competition between two distinct modes of TGF-\u03b21 activation: a TSP1-mediated mode of high activation and a PLS-mediated mode of low activation. This switch suggests an explanation for the unexpected effects of the plasminogen activation system on TGF-\u03b21 in fibrotic diseases in vivo, as well as novel prognostic and therapeutic approaches for diseases with TGF-\u03b2 dysregulation.
To the extent possible under law, all copyright and related orneighbouring rights to this encoded model have been dedicated to the publicdomain worldwide. Please refer to CC0 Public DomainDedication for more information.
Br\u00e4nnmark2013 - Insulin signalling in human adipocytes (normal condition)
The paper describes insulin signalling in human adipocytes under normal and diabetic states using mathematical models based on experimental data. This model corresponds to insulin signalling under normal condtion
Br\u00e4nnmark C, Nyman E, Fagerholm S, Bergenholm L, Ekstrand EM, Cedersund G, Str\u00e5lfors P.
J Biol Chem. 2013 Apr 5;288(14):9867-80.
Abstract:
Type 2 diabetes originates in an expanding adipose tissue that for unknown reasons becomes insulin resistant. Insulin resistance reflects impairments in insulin signaling, but mechanisms involved are unclear because current research is fragmented. We report a systems level mechanistic understanding of insulin resistance, using systems wide and internally consistent data from human adipocytes. Based on quantitative steady-state and dynamic time course data on signaling intermediaries, normally and in diabetes, we developed a dynamic mathematical model of insulin signaling. The model structure and parameters are identical in the normal and diabetic states of the model, except for three parameters that change in diabetes: (i) reduced concentration of insulin receptor, (ii) reduced concentration of insulin-regulated glucose transporter GLUT4, and (iii) changed feedback from mammalian target of rapamycin in complex with raptor (mTORC1). Modeling reveals that at the core of insulin resistance in human adipocytes is attenuation of a positive feedback from mTORC1 to the insulin receptor substrate-1, which explains reduced sensitivity and signal strength throughout the signaling network. Model simulations with inhibition of mTORC1 are comparable with experimental data on inhibition of mTORC1 using rapamycin in human adipocytes. We demonstrate the potential of the model for identification of drug targets, e.g. increasing the feedback restores insulin signaling, both at the cellular level and, using a multilevel model, at the whole body level. Our findings suggest that insulin resistance in an expanded adipose tissue results from cell growth restriction to prevent cell necrosis.
To the extent possible under law, all copyright and related orneighbouring rights to this encoded model have been dedicated to the publicdomain worldwide. Please refer to CC0 Public DomainDedication for more information.
Br\u00e4nnmark2013 - Insulin signalling in human adipocytes (diabetic condition)
The paper describes insulin signalling in human adipocytes under normal and diabetic states using mathematical models based on experimental data. This model corresponds to insulin signalling under diabetic condtion
Br\u00e4nnmark C, Nyman E, Fagerholm S, Bergenholm L, Ekstrand EM, Cedersund G, Str\u00e5lfors P.
J Biol Chem. 2013 Apr 5;288(14):9867-80.
Abstract:
Type 2 diabetes originates in an expanding adipose tissue that for unknown reasons becomes insulin resistant. Insulin resistance reflects impairments in insulin signaling, but mechanisms involved are unclear because current research is fragmented. We report a systems level mechanistic understanding of insulin resistance, using systems wide and internally consistent data from human adipocytes. Based on quantitative steady-state and dynamic time course data on signaling intermediaries, normally and in diabetes, we developed a dynamic mathematical model of insulin signaling. The model structure and parameters are identical in the normal and diabetic states of the model, except for three parameters that change in diabetes: (i) reduced concentration of insulin receptor, (ii) reduced concentration of insulin-regulated glucose transporter GLUT4, and (iii) changed feedback from mammalian target of rapamycin in complex with raptor (mTORC1). Modeling reveals that at the core of insulin resistance in human adipocytes is attenuation of a positive feedback from mTORC1 to the insulin receptor substrate-1, which explains reduced sensitivity and signal strength throughout the signaling network. Model simulations with inhibition of mTORC1 are comparable with experimental data on inhibition of mTORC1 using rapamycin in human adipocytes. We demonstrate the potential of the model for identification of drug targets, e.g. increasing the feedback restores insulin signaling, both at the cellular level and, using a multilevel model, at the whole body level. Our findings suggest that insulin resistance in an expanded adipose tissue results from cell growth restriction to prevent cell necrosis.
To the extent possible under law, all copyright and related orneighbouring rights to this encoded model have been dedicated to the publicdomain worldwide. Please refer to CC0 Public DomainDedication for more information.
Reyes-Palomares2012 - a combined model hepatic polyamine and sulfur aminoacid metabolism - version2
Mammalian polyamine metabolism consists of a bi-cycle with two required entrances, omithine and S-adenosyl methionine (SAM), and several alternative exists. The relevant regulatory roles of the short half-life enzymes ornithine decarboxylase (ODC), S-adenosyl methione decarboxylase (SAMDC) and spermindine/spermine acetyl transferase (SSAT) in polyamine metabolism are well studied, and has been modelled here.
Reyes-Palomares A, Monta\u00f1ez R, S\u00e1nchez-Jim\u00e9nez F, Medina MA
Amino Acids, February 2012, Volume 42, Issue 2-3, pp 597-610
Abstract:
Many molecular details remain to be uncovered concerning the regulation of polyamine metabolism. A previous model of mammalian polyamine metabolism showed that S-adenosyl methionine availability could play a key role in polyamine homeostasis. To get a deeper insight in this prediction, we have built a combined model by integration of the previously published polyamine model and one-carbon and glutathione metabolism model, published by different research groups. The combined model is robust and it is able to achieve physiological steady-state values, as well as to reproduce the predictions of the individual models. Furthermore, a transition between two versions of our model with new regulatory factors added properly simulates the switch in methionine adenosyl transferase isozymes occurring when the liver enters in proliferative conditions. The combined model is useful to support the previous prediction on the role of S-adenosyl methionine availability in polyamine homeostasis. Furthermore, it could be easily adapted to get deeper insights on the connections of polyamines with energy metabolism.
Notes by the author:
This model combines BIOMD0000000190 and BIOMD0000000268 from BioModels Database, both models include corrections respect to their originals publications.
To simulate a MATI/MATIII switch to MATII in proliferating liver:
We set to 0 the Vmax parameters of MATI and MATIII
We included MATII reaction equation.
We add a regulation factor dependent of SAM levels in ODC and SAMDCe rates of synthesis (66.5/[SAM]).
H2O2 was increased in a 50 % according to an initial state ofproliferating and regenerating liver.
To the extent possible under law, all copyright and related orneighbouring rights to this encoded model have been dedicated to the publicdomain worldwide. Please refer to CC0 Public DomainDedication for more information.
Carbo2013 - Cytokine driven CD4+ T Cell differentiation and phenotype plasticity
CD4+ T cells can differentiate into different phenotypes depending on the cytokine milieu. Here a computational and mathematical model with sixty ordinary differential equations representing a CD4+ T cell differentiating into either Th1, Th2, Th17 or iTreg cells, has been constructed. The model includes cytokines, nuclear receptors and transcription factors that define fate and function of CD4+ T cells. Computational simulations illustrate how a proinflammatory Th17 cell can undergo reprogramming into an anti-inflammatory iTreg phenotype following PPARc activation.
Carbo A, Hontecillas R, Kronsteiner B, Viladomiu M, Pedragosa M, Lu P, Philipson CW, Hoops S, Marathe M, Eubank S, Bisset K, Wendelsdorf K, Jarrah A, Mei Y, Bassaganya-Riera J
PLoS Computational Biology [2013, 9(4):e1003027]
Abstract:
Differentiation of CD4+ T cells into effector or regulatory phenotypes is tightly controlled by the cytokine milieu, complex intracellular signaling networks and numerous transcriptional regulators. We combined experimental approaches and computational modeling to investigate the mechanisms controlling differentiation and plasticity of CD4+ T cells in the gut of mice. Our computational model encompasses the major intracellular pathways involved in CD4+ T cell differentiation into T helper 1 (Th1), Th2, Th17 and induced regulatory T cells (iTreg). Our modeling efforts predicted a critical role for peroxisome proliferator-activated receptor gamma (PPAR\u03b3) in modulating plasticity between Th17 and iTreg cells. PPAR\u03b3 regulates differentiation, activation and cytokine production, thereby controlling the induction of effector and regulatory responses, and is a promising therapeutic target for dysregulated immune responses and inflammation. Our modeling efforts predict that following PPAR\u03b3 activation, Th17 cells undergo phenotype switch and become iTreg cells. This prediction was validated by results of adoptive transfer studies showing an increase of colonic iTreg and a decrease of Th17 cells in the gut mucosa of mice with colitis following pharmacological activation of PPAR\u03b3. Deletion of PPAR\u03b3 in CD4+ T cells impaired mucosal iTreg and enhanced colitogenic Th17 responses in mice with CD4+ T cell-induced colitis. Thus, for the first time we provide novel molecular evidence in vivo demonstrating that PPAR\u03b3 in addition to regulating CD4+ T cell differentiation also plays a major role controlling Th17 and iTreg plasticity in the gut mucosa.
Author's comment: CD4+ T cell computational model (Version 1.4)Steady state corrected. There was a problem in the internalization of IL-17 in its mathematical function.
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The paper describes and compares two models on EGFR signalling between normal and NSCLC cells. Moreover, it is shown that ERK (MAPK), STAT and Akt factor's activation pattern are different between normal and NSCLA models. This model corresponds to EGFR signalling in normal cells.
Created by The MathWorks, Inc. SimBiology tool, Version 3.3
EGFR signaling plays a very important role in NSCLC. It activates Ras/ERK, PI3K/Akt and STAT activation pathways. These are the main pathways for cell proliferation and survival. We have developed two mathematical models to relate to the different EGFR signaling in NSCLC and normal cells in the presence or absence of EGFR and PTEN mutations. The dynamics of downstream signaling pathways vary in the disease state and activation of some factors can be indicative of drug resistance. Our simulation denotes the effect of EGFR mutations and increased expression of certain factors in NSCLC EGFR signaling on each of the three pathways where levels of pERK, pSTAT and pAkt are increased. Over activation of ERK, Akt and STAT3 which are the main cell proliferation and survival factors act as promoting factors for tumor progression in NSCLC. In case of loss of PTEN, Akt activity level is considerably increased. Our simulation results show that in the presence of erlotinib, downstream factors i.e. pAkt, pSTAT3 and pERK are inhibited. However, in case of loss of PTEN expression in the presence of erlotinib, pAkt level would not decrease which demonstrates that these cells are resistant to erlotinib.
To the extent possible under law, all copyright and related orneighbouring rights to this encoded model have been dedicated to the publicdomain worldwide. Please refer to CC0 Public DomainDedication for more information.
The paper describes and compares two models on EGFR signalling between normal and NSCLC cells. Moreover, it is shown that ERK (MAPK), STAT and Akt factor's activation pattern are different between normal and NSCLA models. This model corresponds to EGFR signalling in NSCLA cells.
Created by The MathWorks, Inc. SimBiology tool, Version 3.3
EGFR signaling plays a very important role in NSCLC. It activates Ras/ERK, PI3K/Akt and STAT activation pathways. These are the main pathways for cell proliferation and survival. We have developed two mathematical models to relate to the different EGFR signaling in NSCLC and normal cells in the presence or absence of EGFR and PTEN mutations. The dynamics of downstream signaling pathways vary in the disease state and activation of some factors can be indicative of drug resistance. Our simulation denotes the effect of EGFR mutations and increased expression of certain factors in NSCLC EGFR signaling on each of the three pathways where levels of pERK, pSTAT and pAkt are increased. Over activation of ERK, Akt and STAT3 which are the main cell proliferation and survival factors act as promoting factors for tumor progression in NSCLC. In case of loss of PTEN, Akt activity level is considerably increased. Our simulation results show that in the presence of erlotinib, downstream factors i.e. pAkt, pSTAT3 and pERK are inhibited. However, in case of loss of PTEN expression in the presence of erlotinib, pAkt level would not decrease which demonstrates that these cells are resistant to erlotinib.
To the extent possible under law, all copyright and related orneighbouring rights to this encoded model have been dedicated to the publicdomain worldwide. Please refer to CC0 Public DomainDedication for more information.
Smallbone2013 - Metabolic Control Analysis - Example 1
Metabolic control analysis (MCA) is a biochemical formalism, defining how variables, such as fluxes and concentrations, depend on network parameters. In this paper, owing to its limitations, it is shown with three example models (MODEL1305030000-2) that the algorithm with slight modification can be applied to all models.
Metabolic control analysis is a biochemical formalism defined by Kacser and Burns in 1973, and given firm mathematical basis by Reder in 1988. The algorithm defined by Reder for calculating the control matrices is still used by software programs today, but is only valid for some biochemical models. We show that, with slight modification, the algorithm may be applied to all models.
To the extent possible under law, all copyright and related orneighbouring rights to this encoded model have been dedicated to the publicdomain worldwide. Please refer to CC0 Public DomainDedication for more information.
Smallbone2013 - Metabolic Control Analysis - Example 2
Metabolic control analysis (MCA) is a biochemical formalism, defining how variables, such as fluxes and concentrations, depend on network parameters. In this paper, owing to its limitations, it is shown with three example models (MODEL1305030000-2) that the algorithm with slight modification can be applied to all models.
Metabolic control analysis is a biochemical formalism defined by Kacser and Burns in 1973, and given firm mathematical basis by Reder in 1988. The algorithm defined by Reder for calculating the control matrices is still used by software programs today, but is only valid for some biochemical models. We show that, with slight modification, the algorithm may be applied to all models.
To the extent possible under law, all copyright and related orneighbouring rights to this encoded model have been dedicated to the publicdomain worldwide. Please refer to CC0 Public DomainDedication for more information.
Smallbone2013 - Metabolic Control Analysis - Example 3
Metabolic control analysis (MCA) is a biochemical formalism, defining how variables, such as fluxes and concentrations, depend on network parameters. In this paper, owing to its limitations, it is shown with three example models (MODEL1305030000-2) that the algorithm with slight modification can be applied to all models.
Metabolic control analysis is a biochemical formalism defined by Kacser and Burns in 1973, and given firm mathematical basis by Reder in 1988. The algorithm defined by Reder for calculating the control matrices is still used by software programs today, but is only valid for some biochemical models. We show that, with slight modification, the algorithm may be applied to all models.
To the extent possible under law, all copyright and related orneighbouring rights to this encoded model have been dedicated to the publicdomain worldwide. Please refer to CC0 Public DomainDedication for more information.
This is a model of Saccharomyces cerevisiae mRNA translation which includes the initiation, elongation and termination phases. The model is for 20 condon mRNAs. The building of a multi-factor complex in initiation and also the different processes in elongation and termination are modelled in detail. The model takes into account that ribosomes cover more than one codon of mRNA so that the movement of ribosomes are effectively blocked by other ribosomes several codons downstream. It is assumed that 15 codons are occupied by each ribosome. This blocking effect is considered in reaction R18 in initiation and also reaction R26, the reaction where translocation of ribosomes takes place in elongation. The kinetic functions of these two reactions are based on MacDonald et al. 1968 and Heinrich & Rapaport 1980. All other kinetic functions follow mass-action kinetics. The concentrations of transfer RNA species (Met-tRNA, aa-tRNA and tRNA in the model) are kept constant, while the other species' concentrations can change in the course of the simulation. The model describes the translation of a short mRNA with 20 codons. Therefore, all reactions in the elongation cycle (R22, R23, R25, R26, R28 and R29) and the corresponding species are replicated accordingly to model the species with ribosomes bound at different positions. In summary, the model contains 165 different species and 141 reactions.
The value of the 56 rate constant parameters were estimated by fitting the model against a series of experimental data consisting of modulation of the various translation factors (Figures 2, 3 and S3). Overall the parameter estimation was carried out over 212 different data points (steady states).
Helena Firczuk, Shichina Kannambath, J\u00fcrgen Pahle, Amy Claydon, Robert Beynon, John Duncan, Hans Westerhoff, Pedro Mendes and John EG McCarthy
Molecular Systems Biology. 9:635
Abstract:
Rate control analysis defines the in vivo control map governing yeast protein synthesis and generates an extensively parameterized digital model of the translation pathway. Among other non-intuitive outcomes, translation demonstrates a high degree of functional modularity and comprises a non-stoichiometric combination of proteins manifesting functional convergence on a shared maximal translation rate. In exponentially growing cells, polypeptide elongation (eEF1A, eEF2, and eEF3) exerts the strongest control. The two other strong control points are recruitment of mRNA and tRNAi to the 40S ribosomal subunit (eIF4F and eIF2) and termination (eRF1; Dbp5). In contrast, factors that are found to promote mRNA scanning efficiency on a longer than-average 5\u2032untranslated region (eIF1, eIF1A, Ded1, eIF2B, eIF3, and eIF5) exceed the levels required for maximal control. This is expected to allow the cell to minimize scanning transition times, particularly for longer 5\u2032UTRs. The analysis reveals these and other collective adaptations of control shared across the factors, as well as features that reflect functional modularity and system robustness. Remarkably, gene duplication is implicated in the fine control of cellular protein synthesis.
To the extent possible under law, all copyright and related orneighbouring rights to this encoded model have been dedicated to the publicdomain worldwide. Please refer to CC0 Public DomainDedication for more information.
In this chapter, we describe the steps needed to create a kinetic model of a metabolic pathway using kinetic data from both experimental measurements and literature review. Our methodology is presented by using the example of serine biosynthesis in E. coli.
As there are no plots to be reproduced as curation figure, table 6 and 7 that corresponds to steady state concentration of metabolite and steady state fluxes of reactions has been reproduced.
To the extent possible under law, all copyright and related orneighbouring rights to this encoded model have been dedicated to the publicdomain worldwide. Please refer to CC0 Public DomainDedication for more information.
Liebal2012 - B.subtilis post-transcription instability model
An important transcription factor of B.subsilis is sigma B . Liebal et al. (2012) have performed experiments in B.subtilis wild type and mutant straits to test and validate a mathematical model of the dynamics of sigma B activity. The following three models were constructed and their ability to fit the experimental data were tested. 1) Transcription inhibition model (MODEL1212180000), 2) sigma B proteolysis model (MODEL1302080000) and 3) Post-transcriptional instability model (MODEL1302080001). This model corresponds to the post-transcription instability model (MODEL1302080001).
Liebal UW, Sappa PK, Millat T, Steil L, Homuth G, V\u00f6lker U, Wolkenhauer O.
2012 Jun;8(6):1806-14.
Abstract:
In Bacillus subtilis the \u03c3(B) mediated general stress response provides protection against various environmental and energy related stress conditions. To better understand the general stress response, we need to explore the mechanism by which the components interact. Here, we performed experiments in B. subtilis wild type and mutant strains to test and validate a mathematical model of the dynamics of \u03c3(B) activity. In the mutant strain BSA115, \u03c3(B) transcription is inducible by the addition of IPTG and negative control of \u03c3(B) activity by the anti-sigma factor RsbW is absent. In contrast to our expectations of a continuous \u03b2-galactosidase activity from a ctc::lacZ fusion, we observed a transient activity in the mutant. To explain this experimental finding, we constructed mathematical models reflecting different hypotheses regarding the regulation of \u03c3(B) and \u03b2-galactosidase dynamics. Only the model assuming instability of either ctc::lacZ mRNA or \u03b2-galactosidase protein is able to reproduce the experiments in silico. Subsequent Northern blot experiments revealed stable high-level ctc::lacZ mRNA concentrations after the induction of the \u03c3(B) response. Therefore, we conclude that protein instability following \u03c3(B) activation is the most likely explanation for the experimental observations. Our results thus support the idea that B. subtilis increases the cytoplasmic proteolytic degradation to adapt the proteome in face of environmental challenges following activation of the general stress response. The findings also have practical implications for the analysis of stress response dynamics using lacZ reporter gene fusions, a frequently used strategy for the \u03c3(B) response.
Figure 3a of the reference article has been reproduced. beta-galactosidase (lacz in model) activity at different concentrations of IPTG (100M, 200M and 1000M) has been reproduced. SED-ML (Simulation Experiment Description Markup Language) file is available for this model (see curation tab).
To the extent possible under law, all copyright and related orneighbouring rights to this encoded model have been dedicated to the publicdomain worldwide. Please refer to CC0 Public DomainDedication for more information.
An important transcription factor of B.subsilis is sigma B . Liebal et al. (2012) have performed experiments in B.subtilis wild type and mutant straits to test and validate a mathematical model of the dynamics of sigma B activity. The following three models were constructed and their ability to fit the experimental data were tested. 1) Transcription inhibition model (MODEL1212180000), 2) sigma B proteolysis model (MODEL1302080000) and 3) Post-transcriptional instability model (MODEL1302080001). This model corresponds to the sigma B proteolysis model (MODEL1302080000).
Liebal UW, Sappa PK, Millat T, Steil L, Homuth G, V\u00f6lker U, Wolkenhauer O.
2012 Jun;8(6):1806-14.
Abstract:
In Bacillus subtilis the \u03c3(B) mediated general stress response provides protection against various environmental and energy related stress conditions. To better understand the general stress response, we need to explore the mechanism by which the components interact. Here, we performed experiments in B. subtilis wild type and mutant strains to test and validate a mathematical model of the dynamics of \u03c3(B) activity. In the mutant strain BSA115, \u03c3(B) transcription is inducible by the addition of IPTG and negative control of \u03c3(B) activity by the anti-sigma factor RsbW is absent. In contrast to our expectations of a continuous \u03b2-galactosidase activity from a ctc::lacZ fusion, we observed a transient activity in the mutant. To explain this experimental finding, we constructed mathematical models reflecting different hypotheses regarding the regulation of \u03c3(B) and \u03b2-galactosidase dynamics. Only the model assuming instability of either ctc::lacZ mRNA or \u03b2-galactosidase protein is able to reproduce the experiments in silico. Subsequent Northern blot experiments revealed stable high-level ctc::lacZ mRNA concentrations after the induction of the \u03c3(B) response. Therefore, we conclude that protein instability following \u03c3(B) activation is the most likely explanation for the experimental observations. Our results thus support the idea that B. subtilis increases the cytoplasmic proteolytic degradation to adapt the proteome in face of environmental challenges following activation of the general stress response. The findings also have practical implications for the analysis of stress response dynamics using lacZ reporter gene fusions, a frequently used strategy for the \u03c3(B) response.
Figure 3a of the reference article has been reproduced. beta-galactosidase (lacz in model) activity at different concentrations of IPTG (100M, 200M and 1000M) has been reproduced. SED-ML (Simulation Experiment Description Markup Language) file is available for this model (see curation tab).
To the extent possible under law, all copyright and related orneighbouring rights to this encoded model have been dedicated to the publicdomain worldwide. Please refer to CC0 Public DomainDedication for more information.
Liebal2012 - B.subtilis transcription inhibition model
An important transcription factor of B.subsilis is sigma B . Liebal et al. (2012) have performed experiments in B.subtilis wild type and mutant straits to test and validate a mathematical model of the dynamics of sigma B activity. The following three models are constructed and their ability to fit the experimental data were tested. 1) Transcription inhibition model (MODEL1212180000), 2) sigma B proteolysis model (MODEL1302080000) and 3) Post-transcriptional instability model (MODEL1302080001). This model corresponds to the Transcription inhibition model (MODEL1212180000).
Liebal UW, Sappa PK, Millat T, Steil L, Homuth G, V\u00f6lker U, Wolkenhauer O.
2012 Jun;8(6):1806-14.
Abstract:
In Bacillus subtilis the \u03c3(B) mediated general stress response provides protection against various environmental and energy related stress conditions. To better understand the general stress response, we need to explore the mechanism by which the components interact. Here, we performed experiments in B. subtilis wild type and mutant strains to test and validate a mathematical model of the dynamics of \u03c3(B) activity. In the mutant strain BSA115, \u03c3(B) transcription is inducible by the addition of IPTG and negative control of \u03c3(B) activity by the anti-sigma factor RsbW is absent. In contrast to our expectations of a continuous \u03b2-galactosidase activity from a ctc::lacZ fusion, we observed a transient activity in the mutant. To explain this experimental finding, we constructed mathematical models reflecting different hypotheses regarding the regulation of \u03c3(B) and \u03b2-galactosidase dynamics. Only the model assuming instability of either ctc::lacZ mRNA or \u03b2-galactosidase protein is able to reproduce the experiments in silico. Subsequent Northern blot experiments revealed stable high-level ctc::lacZ mRNA concentrations after the induction of the \u03c3(B) response. Therefore, we conclude that protein instability following \u03c3(B) activation is the most likely explanation for the experimental observations. Our results thus support the idea that B. subtilis increases the cytoplasmic proteolytic degradation to adapt the proteome in face of environmental challenges following activation of the general stress response. The findings also have practical implications for the analysis of stress response dynamics using lacZ reporter gene fusions, a frequently used strategy for the \u03c3(B) response.
Figure 3a of the reference article has been reproduced. beta-galactosidase (lacz in model) activity at different concentrations of IPTG (100M, 200M and 1000M) has been reproduced. SED-ML (Simulation Experiment Description Markup Language) file is available for this model (see curation tab).
To the extent possible under law, all copyright and related orneighbouring rights to this encoded model have been dedicated to the publicdomain worldwide. Please refer to CC0 Public DomainDedication for more information.
BACKGROUND: Alzheimer's disease (AD) is the most frequently diagnosed neurodegenerative disorder affecting humans, with advanced age being the most prominent risk factor for developing AD. Despite intense research efforts aimed at elucidating the precise molecular underpinnings of AD, a definitive answer is still lacking. In recent years, consensus has grown that dimerisation of the polypeptide amyloid-beta (A\u00df), particularly A\u00df\u2084\u2082, plays a crucial role in the neuropathology that characterise AD-affected post-mortem brains, including the large-scale accumulation of fibrils, also referred to as senile plaques. This has led to the realistic hope that targeting A\u00df\u2084\u2082 immunotherapeutically could drastically reduce plaque burden in the ageing brain, thus delaying AD onset or symptom progression. Stochastic modelling is a useful tool for increasing understanding of the processes underlying complex systems-affecting disorders such as AD, providing a rapid and inexpensive strategy for testing putative new therapies. In light of the tool's utility, we developed computer simulation models to examine A\u00df\u2084\u2082 turnover and its aggregation in detail and to test the effect of immunization against A\u00df dimers.
RESULTS: Our model demonstrates for the first time that even a slight decrease in the clearance rate of A\u00df\u2084\u2082 monomers is sufficient to increase the chance of dimers forming, which could act as instigators of protofibril and fibril formation, resulting in increased plaque levels. As the process is slow and levels of A\u03b2 are normally low, stochastic effects are important. Our model predicts that reducing the rate of dimerisation leads to a significant reduction in plaque levels and delays onset of plaque formation. The model was used to test the effect of an antibody mediated immunological response. Our results showed that plaque levels were reduced compared to conditions where antibodies are not present.
CONCLUSION: Our model supports the current thinking that levels of dimers are important in initiating the aggregation process. Although substantial knowledge exists regarding the process, no therapeutic intervention is on offer that reliably decreases disease burden in AD patients. Computer modelling could serve as one of a number of tools to examine both the validity of reliable biomarkers and aid the discovery of successful intervention strategies.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
The model describes the life cycle of influenza A virus in a mammalian cell including the following steps: attachment of parental virions to the cell membrane, receptor-mediated endocytosis, fusion of the virus envelope with the endosomal membrane, nuclear import of vRNPs, viral transcription and replication, translation of the structural viral proteins, nuclear export of progeny vRNPs and budding of new virions. It also explicitly accounts for the stabilization of cRNA by viral polymerases and NP and the inhibition of vRNP activity by M1 protein binding. In short, the model focuses on the molecular mechanism that controls viral transcription and replication.
Influenza viruses transcribe and replicate their negative-sense RNA genome inside the nucleus of host cells via three viral RNA species. In the course of an infection, these RNAs show distinct dynamics, suggesting that differential regulation takes place. To investigate this regulation in a systematic way, we developed a mathematical model of influenza virus infection at the level of a single mammalian cell. It accounts for key steps of the viral life cycle, from virus entry to progeny virion release, while focusing in particular on the molecular mechanisms that control viral transcription and replication. We therefore explicitly consider the nuclear export of viral genome copies (vRNPs) and a recent hypothesis proposing that replicative intermediates (cRNA) are stabilized by the viral polymerase complex and the nucleoprotein (NP). Together, both mechanisms allow the model to capture a variety of published data sets at an unprecedented level of detail. Our findings provide theoretical support for an early regulation of replication by cRNA stabilization. However, they also suggest that the matrix protein 1 (M1) controls viral RNA levels in the late phase of infection as part of its role during the nuclear export of viral genome copies. Moreover, simulations show an accumulation of viral proteins and RNA toward the end of infection, indicating that transport processes or budding limits virion release. Thus, our mathematical model provides an ideal platform for a systematic and quantitative evaluation of influenza virus replication and its complex regulation.
With the current parameter set, the model reproduces an infection at a multiplicity of infection (MOI) of 10. Figure 2A of the paper is reproduced here, with parameters kDegRnp and kSynP changed to zeros.
Initial conditions and parameter changes that were used to obtain specific figures in the article can be found in Table A2.
The model has the correct value for kAttLo as 4.55e-04. The value of this parameter mentioned as 4.55e-02 in Table 1 of the paper is incorrect. This is checked with the author.
To the extent possible under law, all copyright and related orneighbouring rights to this encoded model have been dedicated to the publicdomain worldwide. Please refer to CC0 Public DomainDedication for more information.
",
- "tags": [
- {
- "id": 2936,
- "tag": "BioModels"
- },
- {
- "id": 3781,
- "tag": "BioModels:BIOMD0000000463"
- },
- {
- "id": 3438,
- "tag": "Defense response, incompatible interaction"
- },
- {
- "id": 3782,
- "tag": "Influenza A virus"
- },
- {
- "id": 3114,
- "tag": "Mammalia"
- },
- {
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- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
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- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "name": "Smith2013 - Regulation of Insulin Signalling by Oxidative Stress",
- "repository_type": "biomodels",
- "summary": "
Smith2013 - Regulation of Insulin Signalling by Oxidative Stress
The model describes insulin signalling (in rodent adipocytes), which includes in addition to the core pathway, the transcriptional feedback through the Forkhead box type O (FOXO) transcription factor and interaction with oxidative stress.
BACKGROUND: Existing models of insulin signalling focus on short term dynamics, rather than the longer term dynamics necessary to understand many physiologically relevant behaviours. We have developed a model of insulin signalling in rodent adipocytes that includes both transcriptional feedback through the Forkhead box type O (FOXO) transcription factor, and interaction with oxidative stress, in addition to the core pathway. In the model Reactive Oxygen Species are both generated endogenously and can be applied externally. They regulate signalling though inhibition of phosphatases and induction of the activity of Stress Activated Protein Kinases, which themselves modulate feedbacks to insulin signalling and FOXO.
RESULTS: Insulin and oxidative stress combined produce a lower degree of activation of insulin signalling than insulin alone. Fasting (nutrient withdrawal) and weak oxidative stress upregulate antioxidant defences while stronger oxidative stress leads to a short term activation of insulin signalling but if prolonged can have other effects including degradation of the insulin receptor substrate (IRS1) and FOXO. At high insulin the protective effect of moderate oxidative stress may disappear.
CONCLUSION: Our model is consistent with a wide range of experimental data, some of which is difficult to explain. Oxidative stress can have effects that are both up- and down-regulatory on insulin signalling. Our model therefore shows the complexity of the interaction between the two pathways and highlights the need for such integrated computational models to give insight into the dysregulation of insulin signalling along with more data at the individual level.A complete SBML model file can be downloaded from BIOMODELS (https://www.ebi.ac.uk/biomodels-main) with unique identifier MODEL1212210000.Other files and scripts are available as additional files with this journal article and can be downloaded from https://github.com/graham1034/Smith2012_insulin_signalling.
To the extent possible under law, all copyright and related orneighbouring rights to this encoded model have been dedicated to the publicdomain worldwide. Please refer to CC0 Public DomainDedication for more information.
",
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- "id": 3802,
- "tag": "BioModels:BIOMD0000000474"
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- "tag": "Rattus"
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- "id": 704,
- "tag": "SBML"
- },
- {
- "id": 4364,
- "tag": "Diabetes mellitus"
- }
- ],
- "timestamp_created": "2025-01-30 13:36:15.758775+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000000474",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "content_types": "modeling",
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- "modeling"
- ],
- "default_context": "3",
- "id": 2765,
- "name": "Amara2013 - PCNA ubiquitylation in the activation of PRR pathway",
- "repository_type": "biomodels",
- "summary": " Mechanistic model of the Post-Replication Repair (PRR), the pathway involved in the bypass of DNA lesions induced by sunlight exposure and UV radiation. PRR acts through two different mechanisms, activated by mono- and poly-ubiquitylation of the DNA sliding clamp, called Proliferating Cell Nuclear Antigen (PCNA). This model has been defined according to the stochastic formulation of chemical kinetics [Gillespie DT, J Phys Chem 1977, 81(25):2340-2361], which requires to specify the set of molecular species occurring in the pathway and their respective interactions, formally described as a set of biochemical reactions. The volume considered for this system is 1.666667e-17L; this value can be used to convert the model into the deterministic formulation. ",
- "tags": [
- {
- "id": 2936,
- "tag": "BioModels"
- },
- {
- "id": 3803,
- "tag": "BioModels:BIOMD0000000475"
- },
- {
- "id": 3804,
- "tag": "Postreplication repair"
- },
- {
- "id": 704,
- "tag": "SBML"
- },
- {
- "id": 3039,
- "tag": "Saccharomyces cerevisiae"
- }
- ],
- "timestamp_created": "2025-01-30 13:36:16.211183+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000000475",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "2766": {
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- "content_types": "modeling",
- "content_types_list": [
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- "default_context": "3",
- "id": 2766,
- "name": "Adams2012 - Locke2006 Circadian Rhythm model refined with Input Signal Light Function",
- "repository_type": "biomodels",
- "summary": "
As per BIO0000000089.xml but including a functional light.
Besozzi2012 - Oscillatory regimes in the Ras/cAMP/PKA pathway in S.cerevisiae
Mechanistic model of the Ras/cAMP/PKA in yeast S.cerevisiae. The Ras/cAMP/PKA pathway plays a major role in the regulation of metabolism, stress resistance and cell cycle progress and is tightly regulated by multiple feedback loops, exerted by the protein kinase A (PKA). This model investigates the dynamics of the second messenger cAMP on Ras/cAMP/PKA pathway, to determine the effects of the feedback mechanisms on establising stable oscillatory regimes.
The model has been defined according to the stochastic formulation of chemical kinetics [Gillespie DT, 1977] , which requires to specify the set of molecular species occurring in the pathway and their respective interactions, formally described as a set of biochemical reactions.
The volume considered for this system is 30fL; this value can be used to convert the model into the deterministic formulation.
In the yeast Saccharomyces cerevisiae, the Ras/cAMP/PKA pathway is involved in the regulation of cell growth and proliferation in response to nutritional sensing and stress conditions. The pathway is tightly regulated by multiple feedback loops, exerted by the protein kinase A (PKA) on a few pivotal components of the pathway. In this article, we investigate the dynamics of the second messenger cAMP by performing stochastic simulations and parameter sweep analysis of a mechanistic model of the Ras/cAMP/PKA pathway, to determine the effects that the modulation of these feedback mechanisms has on the establishment of stable oscillatory regimes. In particular, we start by studying the role of phosphodiesterases, the enzymes that catalyze the degradation of cAMP, which represent the major negative feedback in this pathway. Then, we show the results on cAMP oscillations when perturbing the amount of protein Cdc25 coupled with the alteration of the intracellular ratio of the guanine nucleotides (GTP/GDP), which are known to regulate the switch of the GTPase Ras protein. This multi-level regulation of the amplitude and frequency of oscillations in the Ras/cAMP/PKA pathway might act as a fine tuning mechanism for the downstream targets of PKA, as also recently evidenced by some experimental investigations on the nucleocytoplasmic shuttling of the transcription factor Msn2 in yeast cells.
To the extent possible under law, all copyright and related orneighbouring rights to this encoded model have been dedicated to the publicdomain worldwide. Please refer to CC0 Public DomainDedication for more information.
Croft2013 - GPCR-RGS interaction that compartmentalizes RGS activity
Through modelling studies, the classic quaternary complex (ligand-GPCR-G-RGS) has been extended to include an additional layer of regulation through GPCR-RGS interactions, which facilitate the compartmentalization of RGS activity into the plasma membrane and non-plasma compartments.
Croft W, Hill C, McCann E, Bond M, Esparza-Franco M, Bennett J, Rand D, Davey J, Ladds G.
J Biol Chem. 2013 Sep 20;288(38):27327-42.
Abstract:
G protein-coupled receptors (GPCRs) can interact with regulator of G protein signaling (RGS) proteins. However, the effects of such interactions on signal transduction and their physiological relevance have been largely undetermined. Ligand-bound GPCRs initiate by promoting exchange of GDP for GTP on the G\u03b1 subunit of heterotrimeric G proteins. Signaling is terminated by hydrolysis of GTP to GDP through intrinsic GTPase activity of the G\u03b1 subunit, a reaction catalyzed by RGS proteins. Using yeast as a tool to study GPCR signaling in isolation, we define an interaction between the cognate GPCR (Mam2) and RGS (Rgs1), mapping the interaction domains. This reaction tethers Rgs1 at the plasma membrane and is essential for physiological signaling response. In vivo quantitative data inform the development of a kinetic model of the GTPase cycle, which extends previous attempts by including GPCR-RGS interactions. In vivo and in silico data confirm that GPCR-RGS interactions can impose an additional layer of regulation through mediating RGS subcellular localization to compartmentalize RGS activity within a cell, thus highlighting their importance as potential targets to modulate GPCR signaling pathways.
Author's comment on reproducing the plots: To reproduce dose-response plots in the publication, the model is simulated with 12 different ligand concentrations (see parameter Ligand_conc). For each ligand concentration, a single value corresponding to total amount of output must be obtained, by calculating the area under the curve of the trajectory of species z3, from time=0 to time=30. These total output values are then used to build a dose-response plot (authors used GraphPad Prism). Mutant strains are simulated with alternative parameter values or initial conditions specified in the Supplementary Material.
To the extent possible under law, all copyright and related orneighbouring rights to this encoded model have been dedicated to the publicdomain worldwide. Please refer to CC0 Public DomainDedication for more information.
",
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- "id": 3809,
- "tag": "BioModels:BIOMD0000000479"
- },
- {
- "id": 3287,
- "tag": "Regulation of GTPase activity"
- },
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- "id": 704,
- "tag": "SBML"
- },
- {
- "id": 3039,
- "tag": "Saccharomyces cerevisiae"
- }
- ],
- "timestamp_created": "2025-01-30 13:36:18.204084+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000000479",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
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- "username": "osbadmin"
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- "default_context": "3",
- "id": 2770,
- "name": "Carbo2013 - Mucosal Immune Response during H.pylori Infection",
- "repository_type": "biomodels",
- "summary": "",
- "tags": [
- {
- "id": 3810,
- "tag": "Bacterial infectious disease"
- },
- {
- "id": 2936,
- "tag": "BioModels"
- },
- {
- "id": 3811,
- "tag": "BioModels:BIOMD0000000480"
- },
- {
- "id": 3812,
- "tag": "Defense response to Gram-negative bacterium"
- },
- {
- "id": 3090,
- "tag": "Mus musculus"
- },
- {
- "id": 704,
- "tag": "SBML"
- },
- {
- "id": 3813,
- "tag": "T cell mediated immunity"
- }
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- "timestamp_created": "2025-01-30 13:36:18.760643+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000000480",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "default_context": "3",
- "id": 2771,
- "name": "St\u00f6tzel2012 - Bovine estrous cycle, synchronization with prostaglandin F2\u03b1",
- "repository_type": "biomodels",
- "summary": "C. St\u00f6tzel, J. Pl\u00f6ntzke, W. Heuwieser & S. R\u00f6blitz. Advances in modeling of the bovine estrous cycle: synchronization with PGF2\u03b1. Theriogenology 78, 7 (2012).Our model of the bovine estrous cycle is a set of ordinary differential equations which generates hormone profiles of successive estrous cycles with several follicular waves per cycle. It describes the growth and decay of the follicles and the corpus luteum, as well as the change of the key reproductive hormones, enzymes and processes over time. In this work we describe recent developments of this model towards the administration of prostaglandin F2\u03b1. We validate our model by showing that the simulations agree with observations from synchronization studies and with measured progesterone data after single dose administrations of synthetic prostaglandin F2\u03b1.",
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- "tag": "BioModels"
- },
- {
- "id": 3814,
- "tag": "BioModels:BIOMD0000000481"
- },
- {
- "id": 3337,
- "tag": "Bos taurus"
- },
- {
- "id": 3815,
- "tag": "Ovulation cycle"
- },
- {
- "id": 3816,
- "tag": "Response to prostaglandin F"
- },
- {
- "id": 704,
- "tag": "SBML"
- },
- {
- "id": 4619,
- "tag": "Ovarian disease"
- }
- ],
- "timestamp_created": "2025-01-30 13:36:19.253895+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000000481",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2772": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "3",
- "id": 2772,
- "name": "Noguchi2013 - Insulin dependent glucose metabolism",
- "repository_type": "biomodels",
- "summary": "Rei Noguchi, Hiroyuki Kubota, Katsuyuki Yugi, Yu Toyoshima, Yasunori Komori, Tomoyoshi Soga & Shinya Kuroda. The selective control of glycolysis, gluconeogenesis and glycogenesis by temporal insulin patterns. Molecular Systems Biology 9 (2013).Insulin governs systemic glucose metabolism, including glycolysis, gluconeogenesis and glycogenesis, through temporal change and absolute concentration. However, how insulin-signalling pathway selectively regulates glycolysis, gluconeogenesis and glycogenesis remains to be elucidated. To address this issue, we experimentally measured metabolites in glucose metabolism in response to insulin. Step stimulation of insulin induced transient response of glycolysis and glycogenesis, and sustained response of gluconeogenesis and extracellular glucose concentration (GLC(ex)). Based on the experimental results, we constructed a simple computational model that characterises response of insulin-signalling-dependent glucose metabolism. The model revealed that the network motifs of glycolysis and glycogenesis pathways constitute a feedforward (FF) with substrate depletion and incoherent feedforward loop (iFFL), respectively, enabling glycolysis and glycogenesis responsive to temporal changes of insulin rather than its absolute concentration. In contrast, the network motifs of gluconeogenesis pathway constituted a FF inhibition, enabling gluconeogenesis responsive to absolute concentration of insulin regardless of its temporal patterns. GLC(ex) was regulated by gluconeogenesis and glycolysis. These results demonstrate the selective control mechanism of glucose metabolism by temporal patterns of insulin.",
- "tags": [
- {
- "id": 2936,
- "tag": "BioModels"
- },
- {
- "id": 3817,
- "tag": "BioModels:BIOMD0000000482"
- },
- {
- "id": 3065,
- "tag": "Rattus"
- },
- {
- "id": 3411,
- "tag": "Regulation of insulin secretion involved in cellular response to glucose stimulus"
- },
- {
- "id": 704,
- "tag": "SBML"
- },
- {
- "id": 4364,
- "tag": "Diabetes mellitus"
- }
- ],
- "timestamp_created": "2025-01-30 13:36:19.729373+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000000482",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "default_context": "3",
- "id": 2773,
- "name": "Cao2008 - Network of a toggle switch",
- "repository_type": "biomodels",
- "summary": "Youfang Cao & Jie Liang. Optimal enumeration of state space of finitely buffered stochastic molecular networks and exact computation of steady state landscape probability. BMC Systems Biology 2 (2008).Stochasticity plays important roles in many molecular networks when molecular concentrations are in the range of 0.1 muM to 10nM (about 100 to 10 copies in a cell). The chemical master equation provides a fundamental framework for studying these networks, and the time-varying landscape probability distribution over the full microstates, i.e., the combination of copy numbers of molecular species, provide a full characterization of the network dynamics. A complete characterization of the space of the microstates is a prerequisite for obtaining the full landscape probability distribution of a network. However, there are neither closed-form solutions nor algorithms fully describing all microstates for a given molecular network.",
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- "id": 2936,
- "tag": "BioModels"
- },
- {
- "id": 3818,
- "tag": "BioModels:BIOMD0000000483"
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- {
- "id": 3163,
- "tag": "Regulation of gene expression"
- },
- {
- "id": 704,
- "tag": "SBML"
- },
- {
- "id": 3042,
- "tag": "cellular organisms"
- }
- ],
- "timestamp_created": "2025-01-30 13:36:20.207814+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000000483",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "id": 2774,
- "name": "Cao2013 - Application of ABSIS method in birth-death process",
- "repository_type": "biomodels",
- "summary": "Youfang Cao & Jie Liang. Adaptively biased sequential importance sampling for rare events in reaction networks with comparison to exact solutions from finite buffer dCME method. The Journal of Chemical Physics 139, 2 (2013).Critical events that occur rarely in biological processes are of great importance, but are challenging to study using Monte Carlo simulation. By introducing biases to reaction selection and reaction rates, weighted stochastic simulation algorithms based on importance sampling allow rare events to be sampled more effectively. However, existing methods do not address the important issue of barrier crossing, which often arises from multistable networks and systems with complex probability landscape. In addition, the proliferation of parameters and the associated computing cost pose significant problems. Here we introduce a general theoretical framework for obtaining optimized biases in sampling individual reactions for estimating probabilities of rare events. We further describe a practical algorithm called adaptively biased sequential importance sampling (ABSIS) method for efficient probability estimation. By adopting a look-ahead strategy and by enumerating short paths from the current state, we estimate the reaction-specific and state-specific forward and backward moving probabilities of the system, which are then used to bias reaction selections. The ABSIS algorithm can automatically detect barrier-crossing regions, and can adjust bias adaptively at different steps of the sampling process, with bias determined by the outcome of exhaustively generated short paths. In addition, there are only two bias parameters to be determined, regardless of the number of the reactions and the complexity of the network. We have applied the ABSIS method to four biochemical networks: the birth-death process, the reversible isomerization, the bistable Schl\u00f6gl model, and the enzymatic futile cycle model. For comparison, we have also applied the finite buffer discrete chemical master equation (dCME) method recently developed to obtain exact numerical solutions of the underlying discrete chemical master equations of these problems. This allows us to assess sampling results objectively by comparing simulation results with true answers. Overall, ABSIS can accurately and efficiently estimate rare event probabilities for all examples, often with smaller variance than other importance sampling algorithms. The ABSIS method is general and can be applied to study rare events of other stochastic networks with complex probability landscape.",
- "tags": [
- {
- "id": 2936,
- "tag": "BioModels"
- },
- {
- "id": 3819,
- "tag": "BioModels:BIOMD0000000484"
- },
- {
- "id": 3820,
- "tag": "Regulation of growth"
- },
- {
- "id": 704,
- "tag": "SBML"
- },
- {
- "id": 3042,
- "tag": "cellular organisms"
- }
- ],
- "timestamp_created": "2025-01-30 13:36:20.703316+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000000484",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "2775": {
- "auto_sync": true,
- "content_types": "modeling",
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- ],
- "default_context": "3",
- "id": 2775,
- "name": "Cao2013 - Application of ABSIS method in the bistable Schl\u00f6gl model",
- "repository_type": "biomodels",
- "summary": "F. Schl\ufffdgl. Chemical reaction models for non-equilibrium phase transitions. Zeitschrift f\ufffdr Physik 253, 2 (1972).Critical events that occur rarely in biological processes are of great importance, but are challenging to study using Monte Carlo simulation. By introducing biases to reaction selection and reaction rates, weighted stochastic simulation algorithms based on importance sampling allow rare events to be sampled more effectively. However, existing methods do not address the important issue of barrier crossing, which often arises from multistable networks and systems with complex probability landscape. In addition, the proliferation of parameters and the associated computing cost pose significant problems. Here we introduce a general theoretical framework for obtaining optimized biases in sampling individual reactions for estimating probabilities of rare events. We further describe a practical algorithm called adaptively biased sequential importance sampling (ABSIS) method for efficient probability estimation. By adopting a look-ahead strategy and by enumerating short paths from the current state, we estimate the reaction-specific and state-specific forward and backward moving probabilities of the system, which are then used to bias reaction selections. The ABSIS algorithm can automatically detect barrier-crossing regions, and can adjust bias adaptively at different steps of the sampling process, with bias determined by the outcome of exhaustively generated short paths. In addition, there are only two bias parameters to be determined, regardless of the number of the reactions and the complexity of the network. We have applied the ABSIS method to four biochemical networks: the birth-death process, the reversible isomerization, the bistable Schl\u00f6gl model, and the enzymatic futile cycle model. For comparison, we have also applied the finite buffer discrete chemical master equation (dCME) method recently developed to obtain exact numerical solutions of the underlying discrete chemical master equations of these problems. This allows us to assess sampling results objectively by comparing simulation results with true answers. Overall, ABSIS can accurately and efficiently estimate rare event probabilities for all examples, often with smaller variance than other importance sampling algorithms. The ABSIS method is general and can be applied to study rare events of other stochastic networks with complex probability landscape.",
- "tags": [
- {
- "id": 2936,
- "tag": "BioModels"
- },
- {
- "id": 3821,
- "tag": "BioModels:BIOMD0000000485"
- },
- {
- "id": 3822,
- "tag": "Catalytic activity"
- },
- {
- "id": 704,
- "tag": "SBML"
- },
- {
- "id": 3042,
- "tag": "cellular organisms"
- }
- ],
- "timestamp_created": "2025-01-30 13:36:21.188135+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000000485",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2776": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
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- "default_context": "3",
- "id": 2776,
- "name": "Cao2013 - Application of ABSIS method in the reversible isomerization model",
- "repository_type": "biomodels",
- "summary": "Youfang Cao & Jie Liang. Adaptively biased sequential importance sampling for rare events in reaction networks with comparison to exact solutions from finite buffer dCME method. The Journal of Chemical Physics 139, 2 (2013).Critical events that occur rarely in biological processes are of great importance, but are challenging to study using Monte Carlo simulation. By introducing biases to reaction selection and reaction rates, weighted stochastic simulation algorithms based on importance sampling allow rare events to be sampled more effectively. However, existing methods do not address the important issue of barrier crossing, which often arises from multistable networks and systems with complex probability landscape. In addition, the proliferation of parameters and the associated computing cost pose significant problems. Here we introduce a general theoretical framework for obtaining optimized biases in sampling individual reactions for estimating probabilities of rare events. We further describe a practical algorithm called adaptively biased sequential importance sampling (ABSIS) method for efficient probability estimation. By adopting a look-ahead strategy and by enumerating short paths from the current state, we estimate the reaction-specific and state-specific forward and backward moving probabilities of the system, which are then used to bias reaction selections. The ABSIS algorithm can automatically detect barrier-crossing regions, and can adjust bias adaptively at different steps of the sampling process, with bias determined by the outcome of exhaustively generated short paths. In addition, there are only two bias parameters to be determined, regardless of the number of the reactions and the complexity of the network. We have applied the ABSIS method to four biochemical networks: the birth-death process, the reversible isomerization, the bistable Schl\u00f6gl model, and the enzymatic futile cycle model. For comparison, we have also applied the finite buffer discrete chemical master equation (dCME) method recently developed to obtain exact numerical solutions of the underlying discrete chemical master equations of these problems. This allows us to assess sampling results objectively by comparing simulation results with true answers. Overall, ABSIS can accurately and efficiently estimate rare event probabilities for all examples, often with smaller variance than other importance sampling algorithms. The ABSIS method is general and can be applied to study rare events of other stochastic networks with complex probability landscape.",
- "tags": [
- {
- "id": 2936,
- "tag": "BioModels"
- },
- {
- "id": 3823,
- "tag": "BioModels:BIOMD0000000486"
- },
- {
- "id": 3824,
- "tag": "Macromolecule modification"
- },
- {
- "id": 704,
- "tag": "SBML"
- },
- {
- "id": 3042,
- "tag": "cellular organisms"
- }
- ],
- "timestamp_created": "2025-01-30 13:36:21.714191+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000000486",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2777": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "3",
- "id": 2777,
- "name": "Cao2013 - Application of ABSIS in the the enzymatic futile cycle",
- "repository_type": "biomodels",
- "summary": "Michael Samoilov, Sergey Plyasunov & Adam P. Arkin. Stochastic amplification and signaling in enzymatic futile cycles through noise-induced bistability with oscillations. Proceedings of the National Academy of Sciences 102, 7 (2005).Critical events that occur rarely in biological processes are of great importance, but are challenging to study using Monte Carlo simulation. By introducing biases to reaction selection and reaction rates, weighted stochastic simulation algorithms based on importance sampling allow rare events to be sampled more effectively. However, existing methods do not address the important issue of barrier crossing, which often arises from multistable networks and systems with complex probability landscape. In addition, the proliferation of parameters and the associated computing cost pose significant problems. Here we introduce a general theoretical framework for obtaining optimized biases in sampling individual reactions for estimating probabilities of rare events. We further describe a practical algorithm called adaptively biased sequential importance sampling (ABSIS) method for efficient probability estimation. By adopting a look-ahead strategy and by enumerating short paths from the current state, we estimate the reaction-specific and state-specific forward and backward moving probabilities of the system, which are then used to bias reaction selections. The ABSIS algorithm can automatically detect barrier-crossing regions, and can adjust bias adaptively at different steps of the sampling process, with bias determined by the outcome of exhaustively generated short paths. In addition, there are only two bias parameters to be determined, regardless of the number of the reactions and the complexity of the network. We have applied the ABSIS method to four biochemical networks: the birth-death process, the reversible isomerization, the bistable Schl\u00f6gl model, and the enzymatic futile cycle model. For comparison, we have also applied the finite buffer discrete chemical master equation (dCME) method recently developed to obtain exact numerical solutions of the underlying discrete chemical master equations of these problems. This allows us to assess sampling results objectively by comparing simulation results with true answers. Overall, ABSIS can accurately and efficiently estimate rare event probabilities for all examples, often with smaller variance than other importance sampling algorithms. The ABSIS method is general and can be applied to study rare events of other stochastic networks with complex probability landscape.",
- "tags": [
- {
- "id": 2936,
- "tag": "BioModels"
- },
- {
- "id": 3825,
- "tag": "BioModels:BIOMD0000000487"
- },
- {
- "id": 3826,
- "tag": "Heat generation"
- },
- {
- "id": 704,
- "tag": "SBML"
- },
- {
- "id": 3042,
- "tag": "cellular organisms"
- }
- ],
- "timestamp_created": "2025-01-30 13:36:22.224924+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000000487",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2778": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "3",
- "id": 2778,
- "name": "Proctor2013 - Effect of A\u03b2 immunisation in Alzheimer's disease (deterministic version)",
- "repository_type": "biomodels",
- "summary": "
Proctor2013 - Effect of A\u03b2 immunisationin Alzheimer's disease (deterministic version)
Extension of a previously published stochastic model (designed to examine some of the key pathways involved in the aggregation of amyloid-beta (A\u03b2) and the micro-tubular binding protein tau ( BIOMD0000000286, BIOMD0000000462)) to include the main processes involved in passive and active immunisation against A\u03b2 and then to demonstrate the effects of this intervention on soluble A\u03b2. This is the deterministic version of the model, the stochastic version is BIOMD0000000634.
Progress in the development of therapeutic interventions to treat or slow the progression of Alzheimer's disease has been hampered by lack of efficacy and unforeseen side effects in human clinical trials. This setback highlights the need for new approaches for pre-clinical testing of possible interventions. Systems modelling is becoming increasingly recognised as a valuable tool for investigating molecular and cellular mechanisms involved in ageing and age-related diseases. However, there is still a lack of awareness of modelling approaches in many areas of biomedical research. We previously developed a stochastic computer model to examine some of the key pathways involved in the aggregation of amyloid-beta (A\u03b2) and the micro-tubular binding protein tau. Here we show how we extended this model to include the main processes involved in passive and active immunisation against A\u03b2 and then demonstrate the effects of this intervention on soluble A\u03b2, plaques, phosphorylated tau and tangles. The model predicts that immunisation leads to clearance of plaques but only results in small reductions in levels of soluble A\u03b2, phosphorylated tau and tangles. The behaviour of this model is supported by neuropathological observations in Alzheimer patients immunised against A\u03b2. Since, soluble A\u03b2, phosphorylated tau and tangles more closely correlate with cognitive decline than plaques, our model suggests that immunotherapy against A\u03b2 may not be effective unless it is performed very early in the disease process or combined with other therapies.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
",
- "tags": [
- {
- "id": 2936,
- "tag": "BioModels"
- },
- {
- "id": 3827,
- "tag": "BioModels:BIOMD0000000488"
- },
- {
- "id": 3320,
- "tag": "DNA damage response, signal transduction by p53 class mediator"
- },
- {
- "id": 3507,
- "tag": "Inclusion body assembly"
- },
- {
- "id": 3114,
- "tag": "Mammalia"
- },
- {
- "id": 704,
- "tag": "SBML"
- },
- {
- "id": 4588,
- "tag": "Alzheimer's disease"
- }
- ],
- "timestamp_created": "2025-01-30 13:36:22.740598+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000000488",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2779": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "3",
- "id": 2779,
- "name": "Sharp2013 - Lipopolysaccharide induced NFkB activation",
- "repository_type": "biomodels",
- "summary": "Markus W. Covert, Thomas H. Leung, Jahlionais E. Gaston & David Baltimore. Achieving stability of lipopolysaccharide-induced NF-kappaB activation. Science 309, 5742 (2005).Preterm birth is the single biggest cause of significant neonatal morbidity and mortality, and the incidence is rising. Development of new therapies to treat and prevent preterm labour is seriously hampered by incomplete understanding of the molecular mechanisms that initiate labour at term and preterm. Computational modelling provides a new opportunity to improve this understanding. It is a useful tool in (i) identifying gaps in knowledge and informing future research, and (ii) providing the basis for an in silico model of parturition in which novel drugs to prevent or treat preterm labour can be \"tested\". Despite their merits, computational models are rarely used to study the molecular events initiating labour. Here, we present the first attempt to generate a dynamic kinetic model that has relevance to the molecular mechanisms of preterm labour. Using published data, we model an important candidate signalling pathway in infection-induced preterm labour: that of lipopolysaccharide (LPS) -induced activation of Nuclear Factor kappa B. This is the first model of this pathway to explicitly include molecular interactions upstream of Nuclear Factor kappa B activation. We produced a formalised graphical depiction of the pathway and built a kinetic model based on ordinary differential equations. The kinetic model accurately reproduced published in vitro time course plots of Lipopolysaccharide-induced Nuclear Factor kappa B activation in mouse embryo fibroblasts. In this preliminary work we have provided proof of concept that it is possible to build computational models of signalling pathways that are relevant to the regulation of labour, and suggest that models that are validated with wet-lab experiments have the potential to greatly benefit the field.",
- "tags": [
- {
- "id": 2936,
- "tag": "BioModels"
- },
- {
- "id": 3828,
- "tag": "BioModels:BIOMD0000000489"
- },
- {
- "id": 3829,
- "tag": "Lipopolysaccharide metabolic process"
- },
- {
- "id": 3090,
- "tag": "Mus musculus"
- },
- {
- "id": 3830,
- "tag": "Release of cytoplasmic sequestered NF-kappaB"
- },
- {
- "id": 704,
- "tag": "SBML"
- }
- ],
- "timestamp_created": "2025-01-30 13:36:23.217793+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000000489",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "2780": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "4",
- "id": 2780,
- "name": "Demin2013 - PKPD behaviour - 5-Lipoxygenase inhibitors",
- "repository_type": "biomodels",
- "summary": "
Demin O, Karelina T, Svetlichniy D, Metelkin E, Speshilov G, Demin O Jr, Fairman D, van der Graaf PH, Agoram BM.
CPT Pharmacometrics Syst Pharmacol 2013; 2: e74
Abstract:
Zileuton, a 5-lipoxygenase (5LO) inhibitor, displays complex pharmaokinetic (PK)-pharmacodynamic (PD) behavior. Available clinical data indicate a lack of dose-bronchodilatory response during initial treatment, with a dose response developing after ~1-2 weeks. We developed a quantitative systems pharmacology (QSP) model to understand the mechanism behind this phenomenon. The model described the release, maturation, and trafficking of eosinophils into the airways, leukotriene synthesis by the 5LO enzyme, leukotriene signaling and bronchodilation, and the PK of zileuton. The model provided a plausible explanation for the two-phase bronchodilatory effect of zileuton-the short-term bronchodilation was due to leukotriene inhibition and the long-term bronchodilation was due to inflammatory cell infiltration blockade. The model also indicated that the theoretical maximum bronchodilation of both 5LO inhibition and leukotriene receptor blockade is likely similar. QSP modeling provided interesting insights into the effects of leukotriene modulation.CPT: Pharmacometrics & Systems Pharmacology (2013) 2, e74; doi:10.1038/psp.2013.49; advance online publication 11 September 2013.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
Mitogen-Activated Protein Kinases (MAPKs) cascade plays an important role in regulating plant growth and development, generating cellular responses to the extracellular stimuli. MAPKs cascade mainly consist of three sub-families i.e. mitogen-activated protein kinase kinase kinase (MAPKKK), mitogen-activated protein kinase kinase (MAPKK) and mitogen activated protein kinase (MAPK), several cascades of which are activated by various abiotic and biotic stresses. In this work we have modeled the holistic molecular mechanisms essential to MAPKs activation in response to several abiotic and biotic stresses through a system biology approach and performed its simulation studies. As extent of abiotic and biotic stresses goes on increasing, the process of cell division, cell growth and cell differentiation slow down in time dependent manner. The models developed depict the combinatorial and multicomponent signaling triggered in response to several abiotic and biotic factors. These models can be used to predict behavior of cells in event of various stresses depending on their time and exposure through activation of complex signaling cascades.
To the extent possible under law, all copyright and related orneighbouring rights to this encoded model have been dedicated to the publicdomain worldwide. Please refer to CC0 Public DomainDedication for more information.
Mitogen-Activated Protein Kinases (MAPKs) cascade plays an important role in regulating plant growth and development, generating cellular responses to the extracellular stimuli. MAPKs cascade mainly consist of three sub-families i.e. mitogen-activated protein kinase kinase kinase (MAPKKK), mitogen-activated protein kinase kinase (MAPKK) and mitogen activated protein kinase (MAPK), several cascades of which are activated by various abiotic and biotic stresses. In this work we have modeled the holistic molecular mechanisms essential to MAPKs activation in response to several abiotic and biotic stresses through a system biology approach and performed its simulation studies. As extent of abiotic and biotic stresses goes on increasing, the process of cell division, cell growth and cell differentiation slow down in time dependent manner. The models developed depict the combinatorial and multicomponent signaling triggered in response to several abiotic and biotic factors. These models can be used to predict behavior of cells in event of various stresses depending on their time and exposure through activation of complex signaling cascades.
To the extent possible under law, all copyright and related orneighbouring rights to this encoded model have been dedicated to the publicdomain worldwide. Please refer to CC0 Public DomainDedication for more information.
Schittler D, Hasenauer J, Allg\u00f6wer F, Waldherr S.
Chaos 2010 Dec; 20(4): 045121
Abstract:
Mesenchymal stem cells can give rise to bone and other tissue cells, but their differentiation still escapes full control. In this paper we address this issue by mathematical modeling. We present a model for a genetic switch determining the cell fate of progenitor cells which can differentiate into osteoblasts (bone cells) or chondrocytes (cartilage cells). The model consists of two switch mechanisms and reproduces the experimentally observed three stable equilibrium states: a progenitor, an osteogenic, and a chondrogenic state. Conventionally, the loss of an intermediate (progenitor) state and the entailed attraction to one of two opposite (differentiated) states is modeled as a result of changing parameters. In our model in contrast, we achieve this by distributing the differentiation process to two functional switch parts acting in concert: one triggering differentiation and the other determining cell fate. Via stability and bifurcation analysis, we investigate the effects of biochemical stimuli associated with different system inputs. We employ our model to generate differentiation scenarios on the single cell as well as on the cell population level. The single cell scenarios allow to reconstruct the switching upon extrinsic signals, whereas the cell population scenarios provide a framework to identify the impact of intrinsic properties and the limiting factors for successful differentiation.
To the extent possible under law, all copyright and related orneighbouring rights to this encoded model have been dedicated to the publicdomain worldwide. Please refer to CC0 Public DomainDedication for more information.
Roblitz2013 - Menstrual Cycle following GnRH analogue administration
The model describes the menstrual cycle feedback mechanisms. GnRH, FSH, LH, E2, P4, inbibins A and B, and follicular development are modelled. The model predicts hormonal changes following GnRH analogue administration. Simulation results agree with measurements of hormone blood concentrations. The model gives insight into mechanisms underlying gonadotropin supression.
R\u00f6blitz S, St\u00f6tzel C, Deuflhard P, Jones HM, Azulay DO, van der Graaf PH, Martin SW.
J. Theor. Biol. 2013 Mar; 321: 8-27
Abstract:
The paper presents a differential equation model for the feedback mechanisms between gonadotropin-releasing hormone (GnRH), follicle-stimulating hormone (FSH), luteinizing hormone (LH), development of follicles and corpus luteum, and the production of estradiol (E2), progesterone (P4), inhibin A (IhA), and inhibin B (IhB) during the female menstrual cycle. Compared to earlier human cycle models, there are three important differences: The model presented here (a) does not involve any delay equations, (b) is based on a deterministic modeling of the GnRH pulse pattern, and (c) contains less differential equations and less parameters. These differences allow for a faster simulation and parameter identification. The focus is on modeling GnRH-receptor binding, in particular, by inclusion of a pharmacokinetic/pharmacodynamic (PK/PD) model for a GnRH agonist, Nafarelin, and a GnRH antagonist, Cetrorelix, into the menstrual cycle model. The final mathematical model describes the hormone profiles (LH, FSH, P4, E2) throughout the menstrual cycle of 12 healthy women. It correctly predicts hormonal changes following single and multiple dose administration of Nafarelin or Cetrorelix at different stages in the cycle.
To the extent possible under law, all copyright and related orneighbouring rights to this encoded model have been dedicated to the publicdomain worldwide. Please refer to CC0 Public DomainDedication for more information.
BACKGROUND: Plasmodium is the causal parasite of malaria, infectious disease responsible for the death of up to one million people each year. Glycerophospholipid and consequently membrane biosynthesis are essential for the survival of the parasite and are targeted by a new class of antimalarial drugs developed in our lab. In order to understand the highly redundant phospholipid synthethic pathways and eventual mechanism of resistance to various drugs, an organism specific kinetic model of these metabolic pathways need to be developed in Plasmodium species. RESULTS: Fluxomic data were used to build a quantitative kinetic model of glycerophospholipid pathways in Plasmodium knowlesi. In vitro incorporation dynamics of phospholipids unravels multiple synthetic pathways. A detailed metabolic network with values of the kinetic parameters (maximum rates and Michaelis constants) has been built. In order to obtain a global search in the parameter space, we have designed a hybrid, discrete and continuous, optimization method. Discrete parameters were used to sample the cone of admissible fluxes, whereas the continuous Michaelis and maximum rates constants were obtained by local minimization of an objective function.The model was used to predict the distribution of fluxes within the network of various metabolic precursors.The quantitative analysis was used to understand eventual links between different pathways. The major source of phosphatidylcholine (PC) is the CDP-choline Kennedy pathway.In silico knock-out experiments showed comparable importance of phosphoethanolamine-N-methyltransferase (PMT) and phosphatidylethanolamine-N-methyltransferase (PEMT) for PC synthesis.The flux values indicate that, major part of serine derived phosphatidylethanolamine (PE) is formed via serine decarboxylation, whereas major part of phosphatidylserine (PS) is formed by base-exchange reactions.Sensitivity analysis of CDP-choline pathway shows that the carrier-mediated choline entry into the parasite and the phosphocholine cytidylyltransferase reaction have the largest sensitivity coefficients in this pathway, but does not distinguish a reaction as an unique rate-limiting step.CONCLUSION: We provide a fully parametrized kinetic model for the multiple phospholipid synthetic pathways in P. knowlesi. This model has been used to clarify the relative importance of the various reactions in these metabolic pathways. Future work extensions of this modelling strategy will serve to elucidate the regulatory mechanisms governing the development of Plasmodium during its blood stages, as well as the mechanisms of action of drugs on membrane biosynthetic pathways and eventual mechanisms of resistance.
To the extent possible under law, all copyright and related orneighbouring rights to this encoded model have been dedicated to the publicdomain worldwide. Please refer to CC0 Public DomainDedication for more information.
Stanford NJ, Lubitz T, Smallbone K, Klipp E, Mendes P, Liebermeister W.
PLoS ONE 2013; 8(11): e79195
Abstract:
The quantitative effects of environmental and genetic perturbations on metabolism can be studied in silico using kinetic models. We present a strategy for large-scale model construction based on a logical layering of data such as reaction fluxes, metabolite concentrations, and kinetic constants. The resulting models contain realistic standard rate laws and plausible parameters, adhere to the laws of thermodynamics, and reproduce a predefined steady state. These features have not been simultaneously achieved by previous workflows. We demonstrate the advantages and limitations of the workflow by translating the yeast consensus metabolic network into a kinetic model. Despite crudely selected data, the model shows realistic control behaviour, a stable dynamic, and realistic response to perturbations in extracellular glucose concentrations. The paper concludes by outlining how new data can continuously be fed into the workflow and how iterative model building can assist in directing experiments.
[corrections made to the model compared to the paper, optional]
To the extent possible under law, all copyright and related orneighbouring rights to this encoded model have been dedicated to the publicdomain worldwide. Please refer to CC0 Public DomainDedication for more information.
Stanford2013 - Kinetic model of yeast metabolic network (standard)
Large-scale model construction based on a logical layering of data such as reaction fluxes, metabolite concentrations, and kinetic constants. This model is built with regulatory information.
Stanford NJ, Lubitz T, Smallbone K, Klipp E, Mendes P, Liebermeister W.
PLoS ONE 2013; 8(11): e79195
Abstract:
The quantitative effects of environmental and genetic perturbations on metabolism can be studied in silico using kinetic models. We present a strategy for large-scale model construction based on a logical layering of data such as reaction fluxes, metabolite concentrations, and kinetic constants. The resulting models contain realistic standard rate laws and plausible parameters, adhere to the laws of thermodynamics, and reproduce a predefined steady state. These features have not been simultaneously achieved by previous workflows. We demonstrate the advantages and limitations of the workflow by translating the yeast consensus metabolic network into a kinetic model. Despite crudely selected data, the model shows realistic control behaviour, a stable dynamic, and realistic response to perturbations in extracellular glucose concentrations. The paper concludes by outlining how new data can continuously be fed into the workflow and how iterative model building can assist in directing experiments.
To the extent possible under law, all copyright and related orneighbouring rights to this encoded model have been dedicated to the publicdomain worldwide. Please refer to CC0 Public DomainDedication for more information.
Iron is essential for all known life due to its redox properties; however, these same properties can also lead to its toxicity in overload through the production of reactive oxygen species. Robust systemic and cellular control are required to maintain safe levels of iron, and the liver seems to be where this regulation is mainly located. Iron misregulation is implicated in many diseases, and as our understanding of iron metabolism improves, the list of iron-related disorders grows. Recent developments have resulted in greater knowledge of the fate of iron in the body and have led to a detailed map of its metabolism; however, a quantitative understanding at the systems level of how its components interact to produce tight regulation remains elusive. A mechanistic computational model of human liver iron metabolism, which includes the core regulatory components, is presented here. It was constructed based on known mechanisms of regulation and on their kinetic properties, obtained from several publications. The model was then quantitatively validated by comparing its results with previously published physiological data, and it is able to reproduce multiple experimental findings. A time course simulation following an oral dose of iron was compared to a clinical time course study and the simulation was found to recreate the dynamics and time scale of the systems response to iron challenge. A disease state simulation of haemochromatosis was created by altering a single reaction parameter that mimics a human haemochromatosis gene (HFE) mutation. The simulation provides a quantitative understanding of the liver iron overload that arises in this disease. This model supports and supplements understanding of the role of the liver as an iron sensor and provides a framework for further modelling, including simulations to identify valuable drug targets and design of experiments to improve further our knowledge of this system.
To the extent possible under law, all copyright and related orneighbouring rights to this encoded model have been dedicated to the publicdomain worldwide. Please refer to CC0 Public DomainDedication for more information.
Begitt2014 - STAT1 cooperative DNA binding - double GAS polymer model
The importance of STAT1-cooperative DNA binding in type 1 and type 2 interferon signalling has been studies using experimental and modelling approaches. The authors have developed two ODE models to describe STAT1 binding to short promoter regions of DNA, namely \"single GAS polymer model\" and \"double GAS polymer model\" considering binding to single or double GAS sites, respectively. The length of DNA in the single GAS model was three sites and four sites in double GAS model. This model correspond to the \"double GAS polymer model\".
Begitt A, Droescher M, Meyer T, Schmid CD, Baker M, Antunes F, Owen MR, Naumann R, Decker T, Vinkemeier U
Nat Immunol. 2014 Feb;15(2):168-76.
Abstract:
STAT1 is an indispensable component of a heterotrimer (ISGF3) and a STAT1 homodimer (GAF) that function as transcription regulators in type 1 and type 2 interferon signaling, respectively. To investigate the importance of STAT1-cooperative DNA binding, we generated gene-targeted mice expressing cooperativity-deficient STAT1 with alanine substituted for Phe77. Neither ISGF3 nor GAF bound DNA cooperatively in the STAT1F77A mouse strain, but type 1 and type 2 interferon responses were affected differently. Type 2 interferon-mediated transcription and antibacterial immunity essentially disappeared owing to defective promoter recruitment of GAF. In contrast, STAT1 recruitment to ISGF3 binding sites and type 1 interferon-dependent responses, including antiviral protection, remained intact. We conclude that STAT1 cooperativity is essential for its biological activity and underlies the cellular responses to type 2, but not type 1 interferon.
To the extent possible under law, all copyright and related orneighbouring rights to this encoded model have been dedicated to the publicdomain worldwide. Please refer to CC0 Public DomainDedication for more information.
This model describes the dynamic behaviour of the pentose phosphate pathway with the inclusion of various enzymes involved in the pathway. The model's predictions are compared with experimental observations of transient metabolite concentrations following a glucose pulse.
Hanan L. Messiha, Edward Kent, Naglis Malys, Kathleen M. Carroll, Pedro Mendes, Kieran Smallbone
PeerJ PrePrints 1:e146v2
Abstract:
We present the quantification and kinetic characterisation of the enzymes of the pentose phosphate pathway in Saccharomyces cerevisiae. The data are combined into a mathematical model that describes the dynamics of this system and allows for the predicting changes in metabolite concentrations and fluxes in response to perturbations. We use the model to study the response of yeast to a glucose pulse. We then combine the model with an existing glycolysis one to study the effect of oxidative stress on carbohydrate metabolism. The combination of these two models was made possible by the standardized enzyme kinetic experiments carried out in both studies. This work demonstrates the feasibility of constructing larger network models by merging smaller pathway models.
To the extent possible under law, all copyright and related orneighbouring rights to this encoded model have been dedicated to the publicdomain worldwide. Please refer to CC0 Public DomainDedication for more information.
Hanan L. Messiha, Edward Kent, Naglis Malys, Kathleen M. Carroll, Pedro Mendes, Kieran Smallbone
PeerJ PrePrints 1:e146v2
Abstract:
We present the quantification and kinetic characterisation of the enzymes of the pentose phosphate pathway in Saccharomyces cerevisiae. The data are combined into a mathematical model that describes the dynamics of this system and allows for the predicting changes in metabolite concentrations and fluxes in response to perturbations. We use the model to study the response of yeast to a glucose pulse. We then combine the model with an existing glycolysis one to study the effect of oxidative stress on carbohydrate metabolism. The combination of these two models was made possible by the standardized enzyme kinetic experiments carried out in both studies. This work demonstrates the feasibility of constructing larger network models by merging smaller pathway models.
To the extent possible under law, all copyright and related orneighbouring rights to this encoded model have been dedicated to the publicdomain worldwide. Please refer to CC0 Public Domain Dedication for more information.
Proctor2013 - Cartilage breakdown, interventions to reduce collagen release
The molecular pathways involved in cartilage breakdown is studied using this model to examine possible interventions to reduce cartilage collagen release. The model contains three separate submodels, one which describes the IL-1/JNK signalling pathway, secondly the OSM/STAT3 signalling pathway, and lastly a module which includes proMMP (Matrix matalloproteinase) activation, and aggrecan and collagen release.
Objective. To use a novel computational approach to examine the molecular pathways involved in cartilage breakdown and to use computer simulation to test possible interventions to reduce collagen release. Methods. We constructed a computational model of the relevant molecular pathways using the Systems Biology Markup Language (SBML), a computer-readable format of a biochemical network. The model was constructed using our experimental data showing that interleukin-1 (IL-1) and oncostatin M (OSM) act synergistically to up-regulate collagenase protein and activity and initiate cartilage collagen breakdown. Simulations were performed in the COPASI software package. Results. The model predicted that simulated inhibition of c-Jun N-terminal kinase (JNK) or p38 mitogen-activated protein kinase, and over-expression of tissue inhibitor of metalloproteinases 3 (TIMP-3) led to a reduction in collagen release. Over-expression of TIMP-1 was much less effective than TIMP-3 and led to a delay, rather than a reduction, in collagen release. Simulated interventions of receptor antagonists and inhibition of Janus kinase 1 (JAK1), the first kinase in the OSM pathway, were ineffective. So, importantly, the model predicts that it is more effective to intervene at targets which are downstream, such as the JNK pathway, rather than close to the cytokine signal. In vitro experiments confirmed the effectiveness of JNK inhibition. Conclusion. Our study shows the value of computer modelling as a tool for examining possible interventions to reduce cartilage collagen breakdown. The model predicts interventions that either prevent transcription or inhibit activity of collagenases are promising strategies and should be investigated further in an experimental setting. \u00a9 2013 American College of Rheumatology.
To the extent possible under law, all copyright and related orneighbouring rights to this encoded model have been dedicated to the publicdomain worldwide. Please refer to CC0 Public DomainDedication for more information.
vanEunen2013 - Network dynamics of fatty acid \u03b2-oxidation (steady-state model)
Lipid metabolism plays an important role in the development of metabolic syndrome, a major risk factor for cardiovascular disease and diabetes. This model gives insights into the response of lipid oxidation to dietart and medical interventions. The model predicts the rate of lipid oxidation and the time course of most acyl carnitines. There are two models described in the paper, (i) steady-state model [ BIOMD0000000505 ], (ii) time-course model [ BIOMD0000000506 ]. This model corresponds to the steady-state model.
van Eunen K, Simons SM, Gerding A, Bleeker A, den Besten G, Touw CM, Houten SM, Groen BK, Krab K, Reijngoud DJ, Bakker BM.
PLoS Comput Biol. 2013;9(8):e1003186.
Abstract:
Fatty-acid metabolism plays a key role in acquired and inborn metabolic diseases. To obtain insight into the network dynamics of fatty-acid \u03b2-oxidation, we constructed a detailed computational model of the pathway and subjected it to a fat overload condition. The model contains reversible and saturable enzyme-kinetic equations and experimentally determined parameters for rat-liver enzymes. It was validated by adding palmitoyl CoA or palmitoyl carnitine to isolated rat-liver mitochondria: without refitting of measured parameters, the model correctly predicted the \u03b2-oxidation flux as well as the time profiles of most acyl-carnitine concentrations. Subsequently, we simulated the condition of obesity by increasing the palmitoyl-CoA concentration. At a high concentration of palmitoyl CoA the \u03b2-oxidation became overloaded: the flux dropped and metabolites accumulated. This behavior originated from the competition between acyl CoAs of different chain lengths for a set of acyl-CoA dehydrogenases with overlapping substrate specificity. This effectively induced competitive feedforward inhibition and thereby led to accumulation of CoA-ester intermediates and depletion of free CoA (CoASH). The mitochondrial [NAD\u207a]/[NADH] ratio modulated the sensitivity to substrate overload, revealing a tight interplay between regulation of \u03b2-oxidation and mitochondrial respiration.
To the extent possible under law, all copyright and related orneighbouring rights to this encoded model have been dedicated to the publicdomain worldwide. Please refer to CC0 Public DomainDedication for more information.
vanEunen2013 - Network dynamics of fatty acid \u03b2-oxidation (time-course model)
Lipid metabolism plays an important role in the development of metabolic syndrome, a major risk factor for cardiovascular disease and diabetes. This model gives insights into the response of lipid oxidation to dietart and medical interventions. The model predicts the rate of lipid oxidation and the time course of most acyl carnitines. There are two models described in the paper, (i) steady-state model [ BIOMD0000000505 ], (ii) time-course model [ BIOMD0000000506 ]. This model corresponds to the time-course model.
van Eunen K, Simons SM, Gerding A, Bleeker A, den Besten G, Touw CM, Houten SM, Groen BK, Krab K, Reijngoud DJ, Bakker BM.
PLoS Comput Biol. 2013;9(8):e1003186.
Abstract:
Fatty-acid metabolism plays a key role in acquired and inborn metabolic diseases. To obtain insight into the network dynamics of fatty-acid \u03b2-oxidation, we constructed a detailed computational model of the pathway and subjected it to a fat overload condition. The model contains reversible and saturable enzyme-kinetic equations and experimentally determined parameters for rat-liver enzymes. It was validated by adding palmitoyl CoA or palmitoyl carnitine to isolated rat-liver mitochondria: without refitting of measured parameters, the model correctly predicted the \u03b2-oxidation flux as well as the time profiles of most acyl-carnitine concentrations. Subsequently, we simulated the condition of obesity by increasing the palmitoyl-CoA concentration. At a high concentration of palmitoyl CoA the \u03b2-oxidation became overloaded: the flux dropped and metabolites accumulated. This behavior originated from the competition between acyl CoAs of different chain lengths for a set of acyl-CoA dehydrogenases with overlapping substrate specificity. This effectively induced competitive feedforward inhibition and thereby led to accumulation of CoA-ester intermediates and depletion of free CoA (CoASH). The mitochondrial [NAD\u207a]/[NADH] ratio modulated the sensitivity to substrate overload, revealing a tight interplay between regulation of \u03b2-oxidation and mitochondrial respiration.
To the extent possible under law, all copyright and related orneighbouring rights to this encoded model have been dedicated to the publicdomain worldwide. Please refer to CC0 Public DomainDedication for more information.
It has been proposed' that gene-regulatory circuits with virtually any desired property can be constructed from networks of simple regulatory elements. These properties, which include multistability and oscillations, have been found in specialized gene circuits such as the bacteriophage lambda switch and the Cyanobacteria circadian oscillator. However, these behaviours have not been demonstrated in networks of non-specialized regulatory components. Here we present the construction of a genetic toggle switch-a synthetic, bistable gene-regulatory network-in Escherichia coli and provide a simple theory that predicts the conditions necessary for bistability. The toggle is constructed from any two repressible promoters arranged in a mutually inhibitory network. It is flipped between stable states using transient chemical or thermal induction and exhibits a nearly ideal switching threshold. As a practical device, the toggle switch forms a synthetic, addressable cellular memory unit and has implications for biotechnology, biocomputing and gene therapy.
To the extent possible under law, all copyright and related orneighbouring rights to this encoded model have been dedicated to the publicdomain worldwide. Please refer to CC0 Public DomainDedication for more information.
Barrack2014 - Calcium/cell cycle coupling - Cyclin D dependent ATP release
This model is designed based on the hypothesis that cytoplasmic calcium accelerates entry into S phase of the cell cycle and/or acts to recruit otherwise quiescents cells onto the cell cycle. The model describes the ATP mediated calcium-cell cycle coupling via Cyclin D in a single radial glial cell.
Most neocortical neurons formed during embryonic brain development arise from radial glial cells which communicate, in part, via ATP mediated calcium signals. Although the intercellular signalling mechanisms that regulate radial glia proliferation are not well understood, it has recently been demonstrated that ATP dependent intracellular calcium release leads to an increase of nearly 100% in overall cellular proliferation. It has been hypothesised that cytoplasmic calcium accelerates entry into S phase of the cell cycle and/or acts to recruit otherwise quiescent cells onto the cell cycle. In this paper we study this cell cycle acceleration and recruitment by forming a differential equation model for ATP mediated calcium-cell cycle coupling via Cyclin D in a single radial glial cell. Bifurcation analysis and numerical simulations suggest that the cell cycle period depends only weakly on cytoplasmic calcium. Therefore, the accelerative impact of calcium on the cell cycle can only account for a small fraction of the large increase in proliferation observed experimentally. Crucially however, our bifurcation analysis reveals that stable fixed point and stable limit cycle solutions can coexist, and that calcium dependent Cyclin D dynamics extend the oscillatory region to lower Cyclin D synthesis rates, thus rendering cells more susceptible to cycling. This supports the hypothesis that cycling glial cells recruit quiescent cells (in G0 phase) onto the cell cycle, via a calcium signalling mechanism, and that this may be the primary means by which calcium augments proliferation rates at the population scale. Numerical simulations of two coupled cells demonstrate that such a scenario is indeed feasible.
To the extent possible under law, all copyright and related orneighbouring rights to this encoded model have been dedicated to the publicdomain worldwide. Please refer to CC0 Public DomainDedication for more information.
Barrack2014 - Calcium/cell cycle coupling - Rs dependent ATP release
This model is designed based on the hypothesis that cytoplasmic calcium accelerates entry into S phase of the cell cycle and/or acts to recruit otherwise quiescents cells onto the cell cycle. The model describes the ATP mediated calcium-cell cycle coupling via Rs (retinoblastoma tumour suppressor protein bound to the E2F transcription factor) in a single radial glial cell.
Most neocortical neurons formed during embryonic brain development arise from radial glial cells which communicate, in part, via ATP mediated calcium signals. Although the intercellular signalling mechanisms that regulate radial glia proliferation are not well understood, it has recently been demonstrated that ATP dependent intracellular calcium release leads to an increase of nearly 100% in overall cellular proliferation. It has been hypothesised that cytoplasmic calcium accelerates entry into S phase of the cell cycle and/or acts to recruit otherwise quiescent cells onto the cell cycle. In this paper we study this cell cycle acceleration and recruitment by forming a differential equation model for ATP mediated calcium-cell cycle coupling via Cyclin D in a single radial glial cell. Bifurcation analysis and numerical simulations suggest that the cell cycle period depends only weakly on cytoplasmic calcium. Therefore, the accelerative impact of calcium on the cell cycle can only account for a small fraction of the large increase in proliferation observed experimentally. Crucially however, our bifurcation analysis reveals that stable fixed point and stable limit cycle solutions can coexist, and that calcium dependent Cyclin D dynamics extend the oscillatory region to lower Cyclin D synthesis rates, thus rendering cells more susceptible to cycling. This supports the hypothesis that cycling glial cells recruit quiescent cells (in G0 phase) onto the cell cycle, via a calcium signalling mechanism, and that this may be the primary means by which calcium augments proliferation rates at the population scale. Numerical simulations of two coupled cells demonstrate that such a scenario is indeed feasible.
To the extent possible under law, all copyright and related orneighbouring rights to this encoded model have been dedicated to the publicdomain worldwide. Please refer to CC0 Public DomainDedication for more information.
Kerkhoven2013 - Glycolysis and Pentose Phosphate Pathway in T.brucei -MODEL C (with glucosomal ribokinase)
There are six models (Model A, B, C, C-fruc, D, D-fruc) described in the paper. Model A ( BIOMD0000000513 ) is the model developed originally by Achar et al. (2012) ( BIOMD0000000428 ), which describes glycolysis in T.brucei. This glycolysis model is extended to include pentose phosphate pathway (PPP), which is Model B (( BIOMD0000000514 ). Model B is further extended to include glycosomal ribokinase, leading to Model C ( BIOMD0000000510 ). Model D ( BIOMD0000000511 ) is again an extension of Model B, which includes an ATP:ADP antiporter. Model C-fruc ( BIOMD0000000515 ) and Model D-fruc ( BIOMD0000000516 ) are extensions of Model C and D, respectively, which includes fructose transporter and its subsequent utilizing reactions. This model correspond to Model C of the paper.
Dynamic models of metabolism can be useful in identifying potential drug targets, especially in unicellular organisms. A model of glycolysis in the causative agent of human African trypanosomiasis, Trypanosoma brucei, has already shown the utility of this approach. Here we add the pentose phosphate pathway (PPP) of T. brucei to the glycolytic model. The PPP is localized to both the cytosol and the glycosome and adding it to the glycolytic model without further adjustments leads to a draining of the essential bound-phosphate moiety within the glycosome. This phosphate \"leak\" must be resolved for the model to be a reasonable representation of parasite physiology. Two main types of theoretical solution to the problem could be identified: (i) including additional enzymatic reactions in the glycosome, or (ii) adding a mechanism to transfer bound phosphates between cytosol and glycosome. One example of the first type of solution would be the presence of a glycosomal ribokinase to regenerate ATP from ribose 5-phosphate and ADP. Experimental characterization of ribokinase in T. brucei showed that very low enzyme levels are sufficient for parasite survival, indicating that other mechanisms are required in controlling the phosphate leak. Examples of the second type would involve the presence of an ATP:ADP exchanger or recently described permeability pores in the glycosomal membrane, although the current absence of identified genes encoding such molecules impedes experimental testing by genetic manipulation. Confronted with this uncertainty, we present a modeling strategy that identifies robust predictions in the context of incomplete system characterization. We illustrate this strategy by exploring the mechanism underlying the essential function of one of the PPP enzymes, and validate it by confirming the model predictions experimentally.
To the extent possible under law, all copyright and related orneighbouring rights to this encoded model have been dedicated to the publicdomain worldwide. Please refer to CC0 Public DomainDedication for more information.
Kerkhoven2013 - Glycolysis and Pentose Phosphate Pathway in T.brucei - MODEL D (with ATP:ADP antiporter)
There are six models (Model A, B, C, C-fruc, D, D-fruc) described in the paper. Model A ( BIOMD0000000513 ) is the model developed originally by Achar et al. (2012) ( BIOMD0000000428 ), which describes glycolysis in T.brucei. This glycolysis model is extended to include pentose phosphate pathway (PPP), which is Model B (( BIOMD0000000514 ). Model B is further extended to include glycosomal ribokinase, leading to Model C ( BIOMD0000000510 ). Model D ( BIOMD0000000511 ) is again an extension of Model B, which includes an ATP:ADP antiporter. Model C-fruc ( BIOMD0000000515 ) and Model D-fruc ( BIOMD0000000516 ) are extensions of Model C and D, respectively, which includes fructose transporter and its subsequent utilizing reactions. This model correspond to Model D of the paper.
Dynamic models of metabolism can be useful in identifying potential drug targets, especially in unicellular organisms. A model of glycolysis in the causative agent of human African trypanosomiasis, Trypanosoma brucei, has already shown the utility of this approach. Here we add the pentose phosphate pathway (PPP) of T. brucei to the glycolytic model. The PPP is localized to both the cytosol and the glycosome and adding it to the glycolytic model without further adjustments leads to a draining of the essential bound-phosphate moiety within the glycosome. This phosphate \"leak\" must be resolved for the model to be a reasonable representation of parasite physiology. Two main types of theoretical solution to the problem could be identified: (i) including additional enzymatic reactions in the glycosome, or (ii) adding a mechanism to transfer bound phosphates between cytosol and glycosome. One example of the first type of solution would be the presence of a glycosomal ribokinase to regenerate ATP from ribose 5-phosphate and ADP. Experimental characterization of ribokinase in T. brucei showed that very low enzyme levels are sufficient for parasite survival, indicating that other mechanisms are required in controlling the phosphate leak. Examples of the second type would involve the presence of an ATP:ADP exchanger or recently described permeability pores in the glycosomal membrane, although the current absence of identified genes encoding such molecules impedes experimental testing by genetic manipulation. Confronted with this uncertainty, we present a modeling strategy that identifies robust predictions in the context of incomplete system characterization. We illustrate this strategy by exploring the mechanism underlying the essential function of one of the PPP enzymes, and validate it by confirming the model predictions experimentally.
To the extent possible under law, all copyright and related orneighbouring rights to this encoded model have been dedicated to the publicdomain worldwide. Please refer to CC0 Public DomainDedication for more information.
Benson N, Metelkin E, Demin O, Li GL, Nichols D, van der Graaf PH.
CPT Pharmacometrics Syst Pharmacol. 2014 Jan 15;3:e91.
Abstract:
The level of the endocannabinoid anandamide is controlled by fatty acid amide hydrolase (FAAH). In 2011, PF-04457845, an irreversible inhibitor of FAAH, was progressed to phase II clinical trials for osteoarthritic pain. This article discusses a prospective, integrated systems pharmacology model evaluation of FAAH as a target for pain in humans, using physiologically based pharmacokinetic and systems biology approaches. The model integrated physiological compartments; endocannabinoid production, degradation, and disposition data; PF-04457845 pharmacokinetics and pharmacodynamics, and cannabinoid receptor CB1-binding kinetics. The modeling identified clear gaps in our understanding and highlighted key risks going forward, in particular relating to whether methods are in place to demonstrate target engagement and pharmacological effect. The value of this modeling exercise will be discussed in detail and in the context of the clinical phase II data, together with recommendations to enable optimal future evaluation of FAAH inhibitors.
To the extent possible under law, all copyright and related orneighbouring rights to this encoded model have been dedicated to the publicdomain worldwide. Please refer to CC0 Public DomainDedication for more information.
There are six models (Model A, B, C, C-fruc, D, D-fruc) described in the paper. Model A ( BIOMD0000000513 ) is the model developed originally by Achar et al. (2012) ( BIOMD0000000428 ), which describes glycolysis in T.brucei. This glycolysis model is extended to include pentose phosphate pathway (PPP), which is Model B (( BIOMD0000000514 ). Model B is further extended to include glycosomal ribokinase, leading to Model C ( BIOMD0000000510 ). Model D ( BIOMD0000000511 ) is again an extension of Model B, which includes an ATP:ADP antiporter. Model C-fruc ( BIOMD0000000515 ) and Model D-fruc ( BIOMD0000000516 ) are extensions of Model C and D, respectively, which includes fructose transporter and its subsequent utilizing reactions. This model correspond to Model A of the paper.
Dynamic models of metabolism can be useful in identifying potential drug targets, especially in unicellular organisms. A model of glycolysis in the causative agent of human African trypanosomiasis, Trypanosoma brucei, has already shown the utility of this approach. Here we add the pentose phosphate pathway (PPP) of T. brucei to the glycolytic model. The PPP is localized to both the cytosol and the glycosome and adding it to the glycolytic model without further adjustments leads to a draining of the essential bound-phosphate moiety within the glycosome. This phosphate \"leak\" must be resolved for the model to be a reasonable representation of parasite physiology. Two main types of theoretical solution to the problem could be identified: (i) including additional enzymatic reactions in the glycosome, or (ii) adding a mechanism to transfer bound phosphates between cytosol and glycosome. One example of the first type of solution would be the presence of a glycosomal ribokinase to regenerate ATP from ribose 5-phosphate and ADP. Experimental characterization of ribokinase in T. brucei showed that very low enzyme levels are sufficient for parasite survival, indicating that other mechanisms are required in controlling the phosphate leak. Examples of the second type would involve the presence of an ATP:ADP exchanger or recently described permeability pores in the glycosomal membrane, although the current absence of identified genes encoding such molecules impedes experimental testing by genetic manipulation. Confronted with this uncertainty, we present a modeling strategy that identifies robust predictions in the context of incomplete system characterization. We illustrate this strategy by exploring the mechanism underlying the essential function of one of the PPP enzymes, and validate it by confirming the model predictions experimentally.
To the extent possible under law, all copyright and related orneighbouring rights to this encoded model have been dedicated to the publicdomain worldwide. Please refer to CC0 Public DomainDedication for more information.
Kerkhoven2013 - Glycolysis and Pentose Phosphate Pathway in T.brucei - MODEL B
There are six models (Model A, B, C, C-fruc, D, D-fruc) described in the paper. Model A ( BIOMD0000000513 ) is the model developed originally by Achar et al. (2012) ( BIOMD0000000428 ), which describes glycolysis in T.brucei. This glycolysis model is extended to include pentose phosphate pathway (PPP), which is Model B (( BIOMD0000000514 ). Model B is further extended to include glycosomal ribokinase, leading to Model C ( BIOMD0000000510 ). Model D ( BIOMD0000000511 ) is again an extension of Model B, which includes an ATP:ADP antiporter. Model C-fruc ( BIOMD0000000515 ) and Model D-fruc ( BIOMD0000000516 ) are extensions of Model C and D, respectively, which includes fructose transporter and its subsequent utilizing reactions. This model correspond to Model B of the paper.
Dynamic models of metabolism can be useful in identifying potential drug targets, especially in unicellular organisms. A model of glycolysis in the causative agent of human African trypanosomiasis, Trypanosoma brucei, has already shown the utility of this approach. Here we add the pentose phosphate pathway (PPP) of T. brucei to the glycolytic model. The PPP is localized to both the cytosol and the glycosome and adding it to the glycolytic model without further adjustments leads to a draining of the essential bound-phosphate moiety within the glycosome. This phosphate \"leak\" must be resolved for the model to be a reasonable representation of parasite physiology. Two main types of theoretical solution to the problem could be identified: (i) including additional enzymatic reactions in the glycosome, or (ii) adding a mechanism to transfer bound phosphates between cytosol and glycosome. One example of the first type of solution would be the presence of a glycosomal ribokinase to regenerate ATP from ribose 5-phosphate and ADP. Experimental characterization of ribokinase in T. brucei showed that very low enzyme levels are sufficient for parasite survival, indicating that other mechanisms are required in controlling the phosphate leak. Examples of the second type would involve the presence of an ATP:ADP exchanger or recently described permeability pores in the glycosomal membrane, although the current absence of identified genes encoding such molecules impedes experimental testing by genetic manipulation. Confronted with this uncertainty, we present a modeling strategy that identifies robust predictions in the context of incomplete system characterization. We illustrate this strategy by exploring the mechanism underlying the essential function of one of the PPP enzymes, and validate it by confirming the model predictions experimentally.
To the extent possible under law, all copyright and related orneighbouring rights to this encoded model have been dedicated to the publicdomain worldwide. Please refer to CC0 Public DomainDedication for more information.
Kerkhoven2013 - Glycolysis and Pentose Phosphate Pathway in T.brucei - MODEL C in fructose medium (with glucosomal ribokinase)
There are six models (Model A, B, C, C-fruc, D, D-fruc) described in the paper. Model A ( BIOMD0000000513 ) is the model developed originally by Achar et al. (2012) ( BIOMD0000000428 ), which describes glycolysis in T.brucei. This glycolysis model is extended to include pentose phosphate pathway (PPP), which is Model B (( BIOMD0000000514 ). Model B is further extended to include glycosomal ribokinase, leading to Model C ( BIOMD0000000510 ). Model D ( BIOMD0000000511 ) is again an extension of Model B, which includes an ATP:ADP antiporter. Model C-fruc ( BIOMD0000000515 ) and Model D-fruc ( BIOMD0000000516 ) are extensions of Model C and D, respectively, which includes fructose transporter and its subsequent utilizing reactions. This model correspond to Model C-fruc of the paper.
Dynamic models of metabolism can be useful in identifying potential drug targets, especially in unicellular organisms. A model of glycolysis in the causative agent of human African trypanosomiasis, Trypanosoma brucei, has already shown the utility of this approach. Here we add the pentose phosphate pathway (PPP) of T. brucei to the glycolytic model. The PPP is localized to both the cytosol and the glycosome and adding it to the glycolytic model without further adjustments leads to a draining of the essential bound-phosphate moiety within the glycosome. This phosphate \"leak\" must be resolved for the model to be a reasonable representation of parasite physiology. Two main types of theoretical solution to the problem could be identified: (i) including additional enzymatic reactions in the glycosome, or (ii) adding a mechanism to transfer bound phosphates between cytosol and glycosome. One example of the first type of solution would be the presence of a glycosomal ribokinase to regenerate ATP from ribose 5-phosphate and ADP. Experimental characterization of ribokinase in T. brucei showed that very low enzyme levels are sufficient for parasite survival, indicating that other mechanisms are required in controlling the phosphate leak. Examples of the second type would involve the presence of an ATP:ADP exchanger or recently described permeability pores in the glycosomal membrane, although the current absence of identified genes encoding such molecules impedes experimental testing by genetic manipulation. Confronted with this uncertainty, we present a modeling strategy that identifies robust predictions in the context of incomplete system characterization. We illustrate this strategy by exploring the mechanism underlying the essential function of one of the PPP enzymes, and validate it by confirming the model predictions experimentally.
To the extent possible under law, all copyright and related orneighbouring rights to this encoded model have been dedicated to the publicdomain worldwide. Please refer to CC0 Public DomainDedication for more information.
Kerkhoven2013 - Glycolysis and Pentose Phosphate Pathway in T.brucei - MODEL D in fructose medium (with ATP:ADP antiporter)
There are six models (Model A, B, C, C-fruc, D, D-fruc) described in the paper. Model A ( BIOMD0000000513 ) is the model developed originally by Achar et al. (2012) ( BIOMD0000000428 ), which describes glycolysis in T.brucei. This glycolysis model is extended to include pentose phosphate pathway (PPP), which is Model B (( BIOMD0000000514 ). Model B is further extended to include glycosomal ribokinase, leading to Model C ( BIOMD0000000510 ). Model D ( BIOMD0000000511 ) is again an extension of Model B, which includes an ATP:ADP antiporter. Model C-fruc ( BIOMD0000000515 ) and Model D-fruc ( BIOMD0000000516 ) are extensions of Model C and D, respectively, which includes fructose transporter and its subsequent utilizing reactions. This model correspond to Model D-fruc of the paper.
Dynamic models of metabolism can be useful in identifying potential drug targets, especially in unicellular organisms. A model of glycolysis in the causative agent of human African trypanosomiasis, Trypanosoma brucei, has already shown the utility of this approach. Here we add the pentose phosphate pathway (PPP) of T. brucei to the glycolytic model. The PPP is localized to both the cytosol and the glycosome and adding it to the glycolytic model without further adjustments leads to a draining of the essential bound-phosphate moiety within the glycosome. This phosphate \"leak\" must be resolved for the model to be a reasonable representation of parasite physiology. Two main types of theoretical solution to the problem could be identified: (i) including additional enzymatic reactions in the glycosome, or (ii) adding a mechanism to transfer bound phosphates between cytosol and glycosome. One example of the first type of solution would be the presence of a glycosomal ribokinase to regenerate ATP from ribose 5-phosphate and ADP. Experimental characterization of ribokinase in T. brucei showed that very low enzyme levels are sufficient for parasite survival, indicating that other mechanisms are required in controlling the phosphate leak. Examples of the second type would involve the presence of an ATP:ADP exchanger or recently described permeability pores in the glycosomal membrane, although the current absence of identified genes encoding such molecules impedes experimental testing by genetic manipulation. Confronted with this uncertainty, we present a modeling strategy that identifies robust predictions in the context of incomplete system characterization. We illustrate this strategy by exploring the mechanism underlying the essential function of one of the PPP enzymes, and validate it by confirming the model predictions experimentally.
To the extent possible under law, all copyright and related orneighbouring rights to this encoded model have been dedicated to the publicdomain worldwide. Please refer to CC0 Public DomainDedication for more information.
Models of the development and early progression of colorectal cancer are based upon understanding the cycle of stem cell turnover, proliferation, differentiation and death. Existing crypt compartmental models feature a linear pathway of cell types, with little regulatory mechanism. Previous work has shown that there are perturbations in the enteroendocrine cell population of macroscopically normal crypts, a compartment not included in existing models. We show that existing models do not adequately recapitulate the dynamics of cell fate pathways in the crypt. We report the progressive development, iterative testing and fitting of a developed compartmental model with additional cell types, and which includes feedback mechanisms and cross-regulatory mechanisms between cell types. The fitting of the model to existing data sets suggests a need to invoke cross-talk between cell types as a feature of colon crypt cycle models.
To the extent possible under law, all copyright and related orneighbouring rights to this encoded model have been dedicated to the publicdomain worldwide. Please refer to CC0 Public DomainDedication for more information.
Models of the development and early progression of colorectal cancer are based upon understanding the cycle of stem cell turnover, proliferation, differentiation and death. Existing crypt compartmental models feature a linear pathway of cell types, with little regulatory mechanism. Previous work has shown that there are perturbations in the enteroendocrine cell population of macroscopically normal crypts, a compartment not included in existing models. We show that existing models do not adequately recapitulate the dynamics of cell fate pathways in the crypt. We report the progressive development, iterative testing and fitting of a developed compartmental model with additional cell types, and which includes feedback mechanisms and cross-regulatory mechanisms between cell types. The fitting of the model to existing data sets suggests a need to invoke cross-talk between cell types as a feature of colon crypt cycle models.
To the extent possible under law, all copyright and related orneighbouring rights to this encoded model have been dedicated to the publicdomain worldwide. Please refer to CC0 Public DomainDedication for more information.
Models of the development and early progression of colorectal cancer are based upon understanding the cycle of stem cell turnover, proliferation, differentiation and death. Existing crypt compartmental models feature a linear pathway of cell types, with little regulatory mechanism. Previous work has shown that there are perturbations in the enteroendocrine cell population of macroscopically normal crypts, a compartment not included in existing models. We show that existing models do not adequately recapitulate the dynamics of cell fate pathways in the crypt. We report the progressive development, iterative testing and fitting of a developed compartmental model with additional cell types, and which includes feedback mechanisms and cross-regulatory mechanisms between cell types. The fitting of the model to existing data sets suggests a need to invoke cross-talk between cell types as a feature of colon crypt cycle models.
To the extent possible under law, all copyright and related orneighbouring rights to this encoded model have been dedicated to the publicdomain worldwide. Please refer to CC0 Public DomainDedication for more information.
Models of the development and early progression of colorectal cancer are based upon understanding the cycle of stem cell turnover, proliferation, differentiation and death. Existing crypt compartmental models feature a linear pathway of cell types, with little regulatory mechanism. Previous work has shown that there are perturbations in the enteroendocrine cell population of macroscopically normal crypts, a compartment not included in existing models. We show that existing models do not adequately recapitulate the dynamics of cell fate pathways in the crypt. We report the progressive development, iterative testing and fitting of a developed compartmental model with additional cell types, and which includes feedback mechanisms and cross-regulatory mechanisms between cell types. The fitting of the model to existing data sets suggests a need to invoke cross-talk between cell types as a feature of colon crypt cycle models.
To the extent possible under law, all copyright and related orneighbouring rights to this encoded model have been dedicated to the publicdomain worldwide. Please refer to CC0 Public DomainDedication for more information.
Ribba2012 - Low-grade gliomas, tumour growth inhibition model
Using longitudinal mean tumour diameter (MTD) data, this model describe the size evolution of low-grade glioma (LGG) in patients treated with chemotherapy or radiotherapy.
Ribba B, Kaloshi G, Peyre M, Ricard D, Calvez V, Tod M, Cajavec-Bernard B, Idbaih A, Psimaras D, Dainese L, Pallud J, Cartalat-Carel S, Delattre JY, Honnorat J, Grenier E, Ducray F.
Clin. Cancer Res. 2012 Sep; 18(18): 5071-5080
Abstract:
PURPOSE: To develop a tumor growth inhibition model for adult diffuse low-grade gliomas (LGG) able to describe tumor size evolution in patients treated with chemotherapy or radiotherapy.
EXPERIMENTAL DESIGN: Using longitudinal mean tumor diameter (MTD) data from 21 patients treated with first-line procarbazine, 1-(2-chloroethyl)-3-cyclohexyl-l-nitrosourea, and vincristine (PCV) chemotherapy, we formulated a model consisting of a system of differential equations, incorporating tumor-specific and treatment-related parameters that reflect the response of proliferative and quiescent tumor tissue to treatment. The model was then applied to the analysis of longitudinal tumor size data in 24 patients treated with first-line temozolomide (TMZ) chemotherapy and in 25 patients treated with first-line radiotherapy.
RESULTS: The model successfully described the MTD dynamics of LGG before, during, and after PCV chemotherapy. Using the same model structure, we were also able to successfully describe the MTD dynamics in LGG patients treated with TMZ chemotherapy or radiotherapy. Tumor-specific parameters were found to be consistent across the three treatment modalities. The model is robust to sensitivity analysis, and preliminary results suggest that it can predict treatment response on the basis of pretreatment tumor size data.
CONCLUSIONS: Using MTD data, we propose a tumor growth inhibition model able to describe LGG tumor size evolution in patients treated with chemotherapy or radiotherapy. In the future, this model might be used to predict treatment efficacy in LGG patients and could constitute a rational tool to conceive more effective chemotherapy schedules.
To the extent possible under law, all copyright and related orneighbouring rights to this encoded model have been dedicated to the publicdomain worldwide. Please refer to CC0 Public DomainDedication for more information.
Muraro2014 - Vascular patterning in Arabidopsis roots
Using a multicellular model, maintanence of vascular patterning in Arabidopsis roots has been studied. The model that is provided here is the single-cell version of the model. The two-cell and multicellular models described in the paper can be downloaded as python scripts (follow the curation tab to get these files).
Muraro D, Mellor N, Pound MP, Help H, Lucas M, Chopard J, Byrne HM, Godin C, Hodgman TC, King JR, Pridmore TP, Helariutta Y, Bennett MJ, Bishopp A.
Proc Natl Acad Sci U S A. 2014 Jan 14;111(2):857-62.
Abstract:
As multicellular organisms grow, positional information is continually needed to regulate the pattern in which cells are arranged. In the Arabidopsis root, most cell types are organized in a radially symmetric pattern; however, a symmetry-breaking event generates bisymmetric auxin and cytokinin signaling domains in the stele. Bidirectional cross-talk between the stele and the surrounding tissues involving a mobile transcription factor, SHORT ROOT (SHR), and mobile microRNA species also determines vascular pattern, but it is currently unclear how these signals integrate. We use a multicellular model to determine a minimal set of components necessary for maintaining a stable vascular pattern. Simulations perturbing the signaling network show that, in addition to the mutually inhibitory interaction between auxin and cytokinin, signaling through SHR, microRNA165/6, and PHABULOSA is required to maintain a stable bisymmetric pattern. We have verified this prediction by observing loss of bisymmetry in shr mutants. The model reveals the importance of several features of the network, namely the mutual degradation of microRNA165/6 and PHABULOSA and the existence of an additional negative regulator of cytokinin signaling. These components form a plausible mechanism capable of patterning vascular tissues in the absence of positional inputs provided by the transport of hormones from the shoot.
To the extent possible under law, all copyright and related orneighbouring rights to this encoded model have been dedicated to the publicdomain worldwide. Please refer to CC0 Public DomainDedication for more information.
Kallenberger2014 - CD95L induced apoptosis initiated by caspase-8, CD95 HeLa cells (cis/trans variant)
The paper describes a new approach that combines single cell and population data in the same model. The model consists of a large number of single cell models, which are fitted to single cell data. Simultaneously, ensemble averages are fitted to population data. It is assumed that the kinetics in each cell can be described with the same kinetic parameters. Therefore, cell-to-cell variability is explained by variable initial protein concentrations.
There are four variants of the model (with [CD95L]=500ng/ml = 16.6nM), i) cistrans (in CD95-HeLa cells) [ MODEL1403050000 ], ii) cistrans (in wild-type HeLa cells) [ MODEL1403050001 ], iii) cistrans-cistrans (in CD95-HeLa cells) [ MODEL1403050002 ], and iv) cistrans-cistrans (in wild-type HeLa cells) [ MODEL1403050003 ].
These model contain the equations for one \"average cell\" with median initial concentrations for CD95, FADD, p55, BID, PrNES_mCherry and PrER_mGFP. By integrating the model, it should be possible to obtain trajectories for PrER_mGFP, PrNES_mCherry, p43 and p18 similar as in Figure 4A (CD95-HeLa cells) and Figure 4B (wild-type HeLa cells).
Stefan M. Kallenberger, Jo\u00ebl Beaudouin, Juliane Claus, Carmen Fischer, Peter K. Sorger, Stefan Legewie, and Roland Eils
11 March 2014: Vol. 7, Issue 316, p. ra23
Abstract:
Apoptosis in response to the ligand CD95L (also known as Fas ligand) is initiated by caspase-8, which is activated by dimerization and self-cleavage at death-inducing signaling complexes (DISCs). Previous work indicated that the degree of substrate cleavage by caspase-8 determines whether a cell dies or survives in response to a death stimulus. To determine how a death ligand stimulus is effectively translated into caspase-8 activity, we assessed this activity over time in single cells with compartmentalized probes that are cleaved by caspase-8 and used multiscale modeling to simultaneously describe single-cell and population data with an ensemble of single-cell models. We derived and experimentally validated a minimal model in which cleavage of caspase-8 in the enzymatic domain occurs in an interdimeric manner through interaction between DISCs, whereas prodomain cleavage sites are cleaved in an intradimeric manner within DISCs. Modeling indicated that sustained membrane-bound caspase-8 activity is followed by transient cytosolic activity, which can be interpreted as a molecular timer mechanism reflected by a limited lifetime of active caspase-8. The activation of caspase-8 by combined intra- and interdimeric cleavage ensures weak signaling at low concentrations of CD95L and strongly accelerated activation at higher ligand concentrations, thereby contributing to precise control of apoptosis.
To the extent possible under law, all copyright and related orneighbouring rights to this encoded model have been dedicated to the publicdomain worldwide. Please refer to CC0 Public DomainDedication for more information.
Kallenberger2014 - CD95L induced apoptosis initiated by caspase-8, wild-type HeLa cells (cis/trans variant)
The paper describes a new approach that combines single cell and population data in the same model. The model consists of a large number of single cell models, which are fitted to single cell data. Simultaneously, ensemble averages are fitted to population data. It is assumed that the kinetics in each cell can be described with the same kinetic parameters. Therefore, cell-to-cell variability is explained by variable initial protein concentrations.
There are four variants of the model (with [CD95L]=500ng/ml = 16.6nM), i) cistrans (in CD95-HeLa cells) [ MODEL1403050000 ], ii) cistrans (in wild-type HeLa cells) [ MODEL1403050001 ], iii) cistrans-cistrans (in CD95-HeLa cells) [ MODEL1403050002 ], and iv) cistrans-cistrans (in wild-type HeLa cells) [ MODEL1403050003 ].
These model contain the equations for one \"average cell\" with median initial concentrations for CD95, FADD, p55, BID, PrNES_mCherry and PrER_mGFP. By integrating the model, it should be possible to obtain trajectories for PrER_mGFP, PrNES_mCherry, p43 and p18 similar as in Figure 4A (CD95-HeLa cells) and Figure 4B (wild-type HeLa cells).
Stefan M. Kallenberger, Jo\u00ebl Beaudouin, Juliane Claus, Carmen Fischer, Peter K. Sorger, Stefan Legewie, and Roland Eils
11 March 2014: Vol. 7, Issue 316, p. ra23
Abstract:
Apoptosis in response to the ligand CD95L (also known as Fas ligand) is initiated by caspase-8, which is activated by dimerization and self-cleavage at death-inducing signaling complexes (DISCs). Previous work indicated that the degree of substrate cleavage by caspase-8 determines whether a cell dies or survives in response to a death stimulus. To determine how a death ligand stimulus is effectively translated into caspase-8 activity, we assessed this activity over time in single cells with compartmentalized probes that are cleaved by caspase-8 and used multiscale modeling to simultaneously describe single-cell and population data with an ensemble of single-cell models. We derived and experimentally validated a minimal model in which cleavage of caspase-8 in the enzymatic domain occurs in an interdimeric manner through interaction between DISCs, whereas prodomain cleavage sites are cleaved in an intradimeric manner within DISCs. Modeling indicated that sustained membrane-bound caspase-8 activity is followed by transient cytosolic activity, which can be interpreted as a molecular timer mechanism reflected by a limited lifetime of active caspase-8. The activation of caspase-8 by combined intra- and interdimeric cleavage ensures weak signaling at low concentrations of CD95L and strongly accelerated activation at higher ligand concentrations, thereby contributing to precise control of apoptosis.
To the extent possible under law, all copyright and related orneighbouring rights to this encoded model have been dedicated to the publicdomain worldwide. Please refer to CC0 Public DomainDedication for more information.
Kallenberger2014 - CD95L induced apoptosis initiated by caspase-8, CD95 HeLa cells (cis/trans-cis/trans variant)
The paper describes a new approach that combines single cell and population data in the same model. The model consists of a large number of single cell models, which are fitted to single cell data. Simultaneously, ensemble averages are fitted to population data. It is assumed that the kinetics in each cell can be described with the same kinetic parameters. Therefore, cell-to-cell variability is explained by variable initial protein concentrations.
There are four variants of the model (with [CD95L]=500ng/ml = 16.6nM), i) cistrans (in CD95-HeLa cells) [ MODEL1403050000 ], ii) cistrans (in wild-type HeLa cells) [ MODEL1403050001 ], iii) cistrans-cistrans (in CD95-HeLa cells) [ MODEL1403050002 ], and iv) cistrans-cistrans (in wild-type HeLa cells) [ MODEL1403050003 ].
These model contain the equations for one \"average cell\" with median initial concentrations for CD95, FADD, p55, BID, PrNES_mCherry and PrER_mGFP. By integrating the model, it should be possible to obtain trajectories for PrER_mGFP, PrNES_mCherry, p43 and p18 similar as in Figure 4A (CD95-HeLa cells) and Figure 4B (wild-type HeLa cells).
Stefan M. Kallenberger, Jo\u00ebl Beaudouin, Juliane Claus, Carmen Fischer, Peter K. Sorger, Stefan Legewie, and Roland Eils
11 March 2014: Vol. 7, Issue 316, p. ra23
Abstract:
Apoptosis in response to the ligand CD95L (also known as Fas ligand) is initiated by caspase-8, which is activated by dimerization and self-cleavage at death-inducing signaling complexes (DISCs). Previous work indicated that the degree of substrate cleavage by caspase-8 determines whether a cell dies or survives in response to a death stimulus. To determine how a death ligand stimulus is effectively translated into caspase-8 activity, we assessed this activity over time in single cells with compartmentalized probes that are cleaved by caspase-8 and used multiscale modeling to simultaneously describe single-cell and population data with an ensemble of single-cell models. We derived and experimentally validated a minimal model in which cleavage of caspase-8 in the enzymatic domain occurs in an interdimeric manner through interaction between DISCs, whereas prodomain cleavage sites are cleaved in an intradimeric manner within DISCs. Modeling indicated that sustained membrane-bound caspase-8 activity is followed by transient cytosolic activity, which can be interpreted as a molecular timer mechanism reflected by a limited lifetime of active caspase-8. The activation of caspase-8 by combined intra- and interdimeric cleavage ensures weak signaling at low concentrations of CD95L and strongly accelerated activation at higher ligand concentrations, thereby contributing to precise control of apoptosis.
To the extent possible under law, all copyright and related orneighbouring rights to this encoded model have been dedicated to the publicdomain worldwide. Please refer to CC0 Public DomainDedication for more information.
Kallenberger2014 - CD95L induced apoptosis initiated by caspase-8, wild-type HeLa cells (cis/trans-cis/trans variant)
The paper describes a new approach that combines single cell and population data in the same model. The model consists of a large number of single cell models, which are fitted to single cell data. Simultaneously, ensemble averages are fitted to population data. It is assumed that the kinetics in each cell can be described with the same kinetic parameters. Therefore, cell-to-cell variability is explained by variable initial protein concentrations.
There are four variants of the model (with [CD95L]=500ng/ml = 16.6nM), i) cistrans (in CD95-HeLa cells) [ MODEL1403050000 ], ii) cistrans (in wild-type HeLa cells) [ MODEL1403050001 ], iii) cistrans-cistrans (in CD95-HeLa cells) [ MODEL1403050002 ], and iv) cistrans-cistrans (in wild-type HeLa cells) [ MODEL1403050003 ].
These model contain the equations for one \"average cell\" with median initial concentrations for CD95, FADD, p55, BID, PrNES_mCherry and PrER_mGFP. By integrating the model, it should be possible to obtain trajectories for PrER_mGFP, PrNES_mCherry, p43 and p18 similar as in Figure 4A (CD95-HeLa cells) and Figure 4B (wild-type HeLa cells).
Stefan M. Kallenberger, Jo\u00ebl Beaudouin, Juliane Claus, Carmen Fischer, Peter K. Sorger, Stefan Legewie, and Roland Eils
11 March 2014: Vol. 7, Issue 316, p. ra23
Abstract:
Apoptosis in response to the ligand CD95L (also known as Fas ligand) is initiated by caspase-8, which is activated by dimerization and self-cleavage at death-inducing signaling complexes (DISCs). Previous work indicated that the degree of substrate cleavage by caspase-8 determines whether a cell dies or survives in response to a death stimulus. To determine how a death ligand stimulus is effectively translated into caspase-8 activity, we assessed this activity over time in single cells with compartmentalized probes that are cleaved by caspase-8 and used multiscale modeling to simultaneously describe single-cell and population data with an ensemble of single-cell models. We derived and experimentally validated a minimal model in which cleavage of caspase-8 in the enzymatic domain occurs in an interdimeric manner through interaction between DISCs, whereas prodomain cleavage sites are cleaved in an intradimeric manner within DISCs. Modeling indicated that sustained membrane-bound caspase-8 activity is followed by transient cytosolic activity, which can be interpreted as a molecular timer mechanism reflected by a limited lifetime of active caspase-8. The activation of caspase-8 by combined intra- and interdimeric cleavage ensures weak signaling at low concentrations of CD95L and strongly accelerated activation at higher ligand concentrations, thereby contributing to precise control of apoptosis.
To the extent possible under law, all copyright and related orneighbouring rights to this encoded model have been dedicated to the publicdomain worldwide. Please refer to CC0 Public DomainDedication for more information.
Kaiser2014 - Salmonella persistence after ciprofloxacin treatment
The model describes the bacterial tolerance to antibiotics. Using a mouse model for Salmonella diarrhea, the authors have found that bacterial persistence occurs in the presence of the antibiotic ciprofloxacin because Salmonella can exist in two different states. One, the fast-growing population that spreads in the host's tissues and the other, slow-growing \"persister\" population that hide out inside dendritic cells of the host's immune system and cannot be attacked by the antibiotics. However, this can be killed by adding agents that directly stimulate the host's immune defense.
Kaiser P, Regoes RR, Dolowschiak T, Wotzka SY, Lengefeld J, Slack E, Grant AJ, Ackermann M, Hardt WD.
PLoS Biol. 2014 Feb 18;12(2):e1001793.
Abstract:
In vivo, antibiotics are often much less efficient than ex vivo and relapses can occur. The reasons for poor in vivo activity are still not completely understood. We have studied the fluoroquinolone antibiotic ciprofloxacin in an animal model for complicated Salmonellosis. High-dose ciprofloxacin treatment efficiently reduced pathogen loads in feces and most organs. However, the cecum draining lymph node (cLN), the gut tissue, and the spleen retained surviving bacteria. In cLN, approximately 10%-20% of the bacteria remained viable. These phenotypically tolerant bacteria lodged mostly within CD103\u207aCX\u2083CR1\u207bCD11c\u207a dendritic cells, remained genetically susceptible to ciprofloxacin, were sufficient to reinitiate infection after the end of the therapy, and displayed an extremely slow growth rate, as shown by mathematical analysis of infections with mixed inocula and segregative plasmid experiments. The slow growth was sufficient to explain recalcitrance to antibiotics treatment. Therefore, slow-growing antibiotic-tolerant bacteria lodged within dendritic cells can explain poor in vivo antibiotic activity and relapse. Administration of LPS or CpG, known elicitors of innate immune defense, reduced the loads of tolerant bacteria. Thus, manipulating innate immunity may augment the in vivo activity of antibiotics.
To the extent possible under law, all copyright and related orneighbouring rights to this encoded model have been dedicated to the publicdomain worldwide. Please refer to CC0 Public DomainDedication for more information.
Fribourg2014 - Dynamics of viral antagonism and innate immune response (H1N1 influenza A virus - Cal/09)
The dynamics of the interplay between the viral antagonism and the innate immune response has been studied using modelling approaches. The responses of human monocyte-derived dendritic cells infected by two influenza A H1N1 strains (the pandemic swine-origin A/California/4/2009 (Cal/09) and the seasonal A/New Caledonia/20/1999 (NC/99)) that have different clinical outcomes have been modelled. From the time course gene expression measurements of a set of selected genes, the dynamic features of viral antagonism and innate immune response are extracted. It is found that the strength and the time scale of action of viral antagonism is significantly different between the two viruses. This model describes the viral infection by seasonal Cal/09.
Fribourg M, Hartmann B, Schmolke M, Marjanovic N, Albrecht RA, Garc\u00eda-Sastre A, Sealfon SC, Jayaprakash C, Hayot F.
J Theor Biol. 2014 Mar 2;351C:47-57.
Abstract:
Viral antagonism of host responses is an essential component of virus pathogenicity. The study of the interplay between immune response and viral antagonism is challenging due to the involvement of many processes acting at multiple time scales. Here we develop an ordinary differential equation model to investigate the early, experimentally measured, responses of human monocyte-derived dendritic cells to infection by two H1N1 influenza A viruses of different clinical outcomes: pandemic A/California/4/2009 and seasonal A/New Caledonia/20/1999. Our results reveal how the strength of virus antagonism, and the time scale over which it acts to thwart the innate immune response, differs significantly between the two viruses, as is made clear by their impact on the temporal behavior of a number of measured genes. The model thus sheds light on the mechanisms that underlie the variability of innate immune responses to different H1N1 viruses.
To the extent possible under law, all copyright and related orneighbouring rights to this encoded model have been dedicated to the publicdomain worldwide. Please refer to CC0 Public DomainDedication for more information.
Fribourg2014 - Dynamics of viral antagonism and innate immune response (H1N1 influenza A virus - NC/99)
The dynamics of the interplay between the viral antagonism and the innate immune response has been studied using modelling approaches. The responses of human monocyte-derived dendritic cells infected by two influenza A H1N1 strains (the pandemic swine-origin A/California/4/2009 (Cal/09) and the seasonal A/New Caledonia/20/1999 (NC/99)) that have different clinical outcomes have been modelled. From the time course gene expression measurements of a set of selected genes, the dynamic features of viral antagonism and innate immune response are extracted. It is found that the strength and the time scale of action of viral antagonism is significantly different between the two viruses. This model describes the viral infection by seasonal NC/99.
Fribourg M, Hartmann B, Schmolke M, Marjanovic N, Albrecht RA, Garc\u00eda-Sastre A, Sealfon SC, Jayaprakash C, Hayot F.
J Theor Biol. 2014 Mar 2;351C:47-57.
Abstract:
Viral antagonism of host responses is an essential component of virus pathogenicity. The study of the interplay between immune response and viral antagonism is challenging due to the involvement of many processes acting at multiple time scales. Here we develop an ordinary differential equation model to investigate the early, experimentally measured, responses of human monocyte-derived dendritic cells to infection by two H1N1 influenza A viruses of different clinical outcomes: pandemic A/California/4/2009 and seasonal A/New Caledonia/20/1999. Our results reveal how the strength of virus antagonism, and the time scale over which it acts to thwart the innate immune response, differs significantly between the two viruses, as is made clear by their impact on the temporal behavior of a number of measured genes. The model thus sheds light on the mechanisms that underlie the variability of innate immune responses to different H1N1 viruses.
To the extent possible under law, all copyright and related orneighbouring rights to this encoded model have been dedicated to the publicdomain worldwide. Please refer to CC0 Public DomainDedication for more information.
The model is parameterized using theparameters for gene CCDC3 from Supplementary Table S1. The twomiRNAs which form the triplex together with CCDC3 are miR-551b andmiR-138.
Schmitz U, Lai X, Winter F, Wolkenhauer O, Vera J, Gupta SK.
Nucleic Acids Res. 2014 Jul; 42(12): 7539-7552
Abstract:
MicroRNAs (miRNAs) are an integral part of gene regulation at the post-transcriptional level. Recently, it has been shown that pairs of miRNAs can repress the translation of a target mRNA in a cooperative manner, which leads to an enhanced effectiveness and specificity in target repression. However, it remains unclear which miRNA pairs can synergize and which genes are target of cooperative miRNA regulation. In this paper, we present a computational workflow for the prediction and analysis of cooperating miRNAs and their mutual target genes, which we refer to as RNA triplexes. The workflow integrates methods of miRNA target prediction; triplex structure analysis; molecular dynamics simulations and mathematical modeling for a reliable prediction of functional RNA triplexes and target repression efficiency. In a case study we analyzed the human genome and identified several thousand targets of cooperative gene regulation. Our results suggest that miRNA cooperativity is a frequent mechanism for an enhanced target repression by pairs of miRNAs facilitating distinctive and fine-tuned target gene expression patterns. Human RNA triplexes predicted and characterized in this study are organized in a web resource at www.sbi.uni-rostock.de/triplexrna/.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
Associated with neurodegenerative disorders such as Alzheimer, Parkinson, or prion diseases, the conversion of soluble proteins into amyloid fibrils remains poorly understood. Extensive \"in vitro\" measurements of protein aggregation kinetics have been reported, but no consensus mechanism has emerged until now. This contribution aims at overcoming this gap by proposing a theoretically consistent crystallization-like model (CLM) that is able to describe the classic types of amyloid fibrillization kinetics identified in our literature survey. Amyloid conversion represented as a function of time is shown to follow different curve shapes, ranging from sigmoidal to hyperbolic, according to the relative importance of the nucleation and growth steps. Using the CLM, apparently unrelated data are deconvoluted into generic mechanistic information integrating the combined influence of seeding, nucleation, growth, and fibril breakage events. It is notable that this complex assembly of interdependent events is ultimately reduced to a mathematically simple model, whose two parameters can be determined by little more than visual inspection. The good fitting results obtained for all cases confirm the CLM as a good approximation to the generalized underlying principle governing amyloid fibrillization. A perspective is presented on possible applications of the CLM during the development of new targets for amyloid disease therapeutics.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
BACKGROUNDS: The process of amyloid proteins aggregation causes several human neuropathologies. In some cases, e.g. fibrillar deposits of insulin, the problems are generated in the processes of production and purification of protein and in the pump devices or injectable preparations for diabetics. Experimental kinetics and adequate modelling of chemical inhibition from amyloid aggregation are of practical importance in order to study the viable processing, formulation and storage as well as to predict and optimize the best conditions to reduce the effect of protein nucleation. RESULTS: In this manuscript, experimental data of insulin, A?42 amyloid protein and apomyoglobin fibrillation from recent bibliography were selected to evaluate the capability of a bivariate sigmoid equation to model them. The mathematical functions (logistic combined with Weibull equation) were used in reparameterized form and the effect of inhibitor concentrations on kinetic parameters from logistic equation were perfectly defined and explained. The surfaces of data were accurately described by proposed model and the presented analysis characterized the inhibitory influence on the protein aggregation by several chemicals. Discrimination between true and apparent inhibitors was also confirmed by the bivariate equation. EGCG for insulin (working at pH?=?7.4/T?=?37\u00b0C) and taiwaniaflavone for A?42 were the compounds studied that shown the greatest inhibition capacity. CONCLUSIONS: An accurate, simple and effective model to investigate the inhibition of chemicals on amyloid protein aggregation has been developed. The equation could be useful for the clear quantification of inhibitor potential of chemicals and rigorous comparison among them.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
Amyloid fibrils are a common component in many debilitating human neurological diseases such as Alzheimer's (AD), Parkinson's, and Creutzfeldt-Jakob, and in animal diseases such as BSE. The role of fibrillar ?? proteins in AD has stimulated interest in the kinetics of ?? fibril formation. Kinetic models that include reaction pathways and rate parameters for the various stages of the process can be helpful towards understanding the dynamics on a molecular level. Based upon experimental data, we have developed a mathematical model for the reaction pathways and determined rate parameters for peptide secondary structural conversion and aggregation during the entire fibrillogenesis process from random coil to mature fibrils, including the molecular species that accelerate the conversions. The model and the rate parameters include different molecular structural stages in the nucleation and polymerization processes and the numerical solutions yield graphs of concentrations of different molecular species versus time that are in close agreement with experimental results. The model also allows for the calculation of the time-dependent increase in aggregate size. The calculated results agree well with experimental results, and allow differences in experimental conditions to be included in the calculations. The specific steps of the model and the rate constants that are determined by fitting to experimental data provide insight on the molecular species involved in the fibril formation process.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
Possible avenues for Interleukin-6 (IL-6) inhibition intreating Crohn's disease are compared here. Each model refers toseparate ligands. The system simulates differential activity of theligands on the signalling of IL-6. This affects Signal Transducer and Activator ofTranscription 3 (STAT3) activity on the production ofbiomarker C-Reactive Protein (CRP) expression. Figures referring to this Healthy Volunteer model are 2c and2d.
Dwivedi G, Fitz L, Hegen M, Martin SW, Harrold J, Heatherington A, Li C.
CPT Pharmacometrics Syst Pharmacol 2014; 3: e89
Abstract:
In this study, we have developed a multiscale systems model of interleukin (IL)-6-mediated immune regulation in Crohn's disease, by integrating intracellular signaling with organ-level dynamics of pharmacological markers underlying the disease. This model was linked to a general pharmacokinetic model for therapeutic monoclonal antibodies and used to comparatively study various biotherapeutic strategies targeting IL-6-mediated signaling in Crohn's disease. Our work illustrates techniques to develop mechanistic models of disease biology to study drug-system interaction. Despite a sparse training data set, predictions of the model were qualitatively validated by clinical biomarker data from a pilot trial with tocilizumab. Model-based analysis suggests that strategies targeting IL-6, IL-6R?, or the IL-6/sIL-6R? complex are less effective at suppressing pharmacological markers of Crohn's than dual targeting the IL-6/sIL-6R? complex in addition to IL-6 or IL-6R?. The potential value of multiscale system pharmacology modeling in drug discovery and development is also discussed.CPT: Pharmacometrics & Systems Pharmacology (2014) 3, e89; doi:10.1038/psp.2013.64; advance online publication 8 January 2014.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
Possible avenues for Interleukin-6 (IL-6) inhibition intreating Crohn's disease are compared here. Each model refers toseparate ligands. The system simulates differential activity of theligands on the signalling of IL-6. This affects Signal Transducer and Activator ofTranscription 3 (STAT3) activity on the production ofbiomarker C-Reactive Protein (CRP) expression. Figures referring to this Crohn's Disease model are 4a, 4b,4c and 5a.
Dwivedi G, Fitz L, Hegen M, Martin SW, Harrold J, Heatherington A, Li C.
CPT Pharmacometrics Syst Pharmacol 2014; 3: e89
Abstract:
In this study, we have developed a multiscale systems model of interleukin (IL)-6-mediated immune regulation in Crohn's disease, by integrating intracellular signaling with organ-level dynamics of pharmacological markers underlying the disease. This model was linked to a general pharmacokinetic model for therapeutic monoclonal antibodies and used to comparatively study various biotherapeutic strategies targeting IL-6-mediated signaling in Crohn's disease. Our work illustrates techniques to develop mechanistic models of disease biology to study drug-system interaction. Despite a sparse training data set, predictions of the model were qualitatively validated by clinical biomarker data from a pilot trial with tocilizumab. Model-based analysis suggests that strategies targeting IL-6, IL-6R?, or the IL-6/sIL-6R? complex are less effective at suppressing pharmacological markers of Crohn's than dual targeting the IL-6/sIL-6R? complex in addition to IL-6 or IL-6R?. The potential value of multiscale system pharmacology modeling in drug discovery and development is also discussed.CPT: Pharmacometrics & Systems Pharmacology (2014) 3, e89; doi:10.1038/psp.2013.64; advance online publication 8 January 2014.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
Possible avenues for Interleukin-6 (IL-6) inhibition intreating Crohn's disease are compared here. Each model refers toseparate ligands. The system simulates differential activity of theligands on the signalling of IL-6. This affects Signal Transducer and Activator ofTranscription 3 (STAT3) activity on the production ofbiomarker C-Reactive Protein (CRP) expression. The figure referring to this Crohn's Disease model is 6b.
Dwivedi G, Fitz L, Hegen M, Martin SW, Harrold J, Heatherington A, Li C.
CPT Pharmacometrics Syst Pharmacol 2014; 3: e89
Abstract:
In this study, we have developed a multiscale systems model of interleukin (IL)-6-mediated immune regulation in Crohn's disease, by integrating intracellular signaling with organ-level dynamics of pharmacological markers underlying the disease. This model was linked to a general pharmacokinetic model for therapeutic monoclonal antibodies and used to comparatively study various biotherapeutic strategies targeting IL-6-mediated signaling in Crohn's disease. Our work illustrates techniques to develop mechanistic models of disease biology to study drug-system interaction. Despite a sparse training data set, predictions of the model were qualitatively validated by clinical biomarker data from a pilot trial with tocilizumab. Model-based analysis suggests that strategies targeting IL-6, IL-6R?, or the IL-6/sIL-6R? complex are less effective at suppressing pharmacological markers of Crohn's than dual targeting the IL-6/sIL-6R? complex in addition to IL-6 or IL-6R?. The potential value of multiscale system pharmacology modeling in drug discovery and development is also discussed.CPT: Pharmacometrics & Systems Pharmacology (2014) 3, e89; doi:10.1038/psp.2013.64; advance online publication 8 January 2014.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
Possible avenues for Interleukin-6 (IL-6) inhibition intreating Crohn's disease are compared here. Each model refers toseparate ligands. The system simulates differential activity of theligands on the signalling of IL-6. This affects Signal Transducer and Activator ofTranscription 3 (STAT3) activity on the production ofbiomarker C-Reactive Protein (CRP) expression. Figures referring to this Crohn's Disease model are 3a, 4d,4e, 4f and 5b.
Dwivedi G, Fitz L, Hegen M, Martin SW, Harrold J, Heatherington A, Li C.
CPT Pharmacometrics Syst Pharmacol 2014; 3: e89
Abstract:
In this study, we have developed a multiscale systems model of interleukin (IL)-6-mediated immune regulation in Crohn's disease, by integrating intracellular signaling with organ-level dynamics of pharmacological markers underlying the disease. This model was linked to a general pharmacokinetic model for therapeutic monoclonal antibodies and used to comparatively study various biotherapeutic strategies targeting IL-6-mediated signaling in Crohn's disease. Our work illustrates techniques to develop mechanistic models of disease biology to study drug-system interaction. Despite a sparse training data set, predictions of the model were qualitatively validated by clinical biomarker data from a pilot trial with tocilizumab. Model-based analysis suggests that strategies targeting IL-6, IL-6R?, or the IL-6/sIL-6R? complex are less effective at suppressing pharmacological markers of Crohn's than dual targeting the IL-6/sIL-6R? complex in addition to IL-6 or IL-6R?. The potential value of multiscale system pharmacology modeling in drug discovery and development is also discussed.CPT: Pharmacometrics & Systems Pharmacology (2014) 3, e89; doi:10.1038/psp.2013.64; advance online publication 8 January 2014.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
In genetic disorders associated with premature neuronal death, symptoms may not appear for years or decades. This delay in clinical onset is often assumed to reflect the occurrence of age-dependent cumulative damage. For example, it has been suggested that oxidative stress disrupts metabolism in neurological degenerative disorders by the cumulative damage of essential macromolecules. A prediction of the cumulative damage hypothesis is that the probability of cell death will increase over time. Here we show in contrast that the kinetics of neuronal death in 12 models of photoreceptor degeneration, hippocampal neurons undergoing excitotoxic cell death, a mouse model of cerebellar degeneration and Parkinson's and Huntington's diseases are all exponential and better explained by mathematical models in which the risk of cell death remains constant or decreases exponentially with age. These kinetics argue against the cumulative damage hypothesis; instead, the time of death of any neuron is random. Our findings are most simply accommodated by a 'one-hit' biochemical model in which mutation imposes a mutant steady state on the neuron and a single event randomly initiates cell death. This model appears to be common to many forms of neurodegeneration and has implications for therapeutic strategies.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
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- "summary": "Paul Fran\u00e7ois & Vincent Hakim. Core genetic module: the mixed feedback loop. Physical Review E 72, 3 Pt 1 (2005).The so-called mixed feedback loop (MFL) is a small two-gene network where protein A regulates the transcription of protein B and the two proteins form a heterodimer. It has been found to be statistically over-represented in statistical analyses of gene and protein interaction databases and to lie at the core of several computer-generated genetic networks. Here, we propose and mathematically study a model of the MFL and show that, by itself, it can serve both as a bistable switch and as a clock (an oscillator) depending on kinetic parameters. The MFL phase diagram as well as a detailed description of the nonlinear oscillation regime are presented and some biological examples are discussed. The results emphasize the role of protein interactions in the function of genetic modules and the usefulness of modeling RNA dynamics explicitly.",
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Yugi2014 - Insulin induced signalling (PFKLphosphorylation) - model 1
Insulin induces phosphorylation and activation of liver-type phosphofructokinase 1, which thereby controls a key reaction in glycolysis. This mechanism is revealed using the mathematical model. In this model, the PFKL phosphorylation time courses are obtained from experimental data.
Author's Note: Katsuyuki Yugi thank Akira Funahashi (Keio University, Japan) for his kind advice in converting the model from MATLAB to SBML.
Yugi K, Kubota H, Toyoshima Y, Noguchi R, Kawata K, Komori Y, Uda S, Kunida K, Tomizawa Y, Funato Y, Miki H, Matsumoto M, Nakayama KI, Kashikura K, Endo K, Ikeda K, Soga T, Kuroda S.
Cell Rep 2014 Aug; 8(4): 1171-1183
Abstract:
Cellular homeostasis is regulated by signals through multiple molecular networks that include protein phosphorylation and metabolites. However, where and when the signal flows through a network and regulates homeostasis has not been explored. We have developed a reconstruction method for the signal flow based on time-course phosphoproteome and metabolome data, using multiple databases, and have applied it to acute action of insulin, an important hormone for metabolic homeostasis. An insulin signal flows through a network, through signaling pathways that involve 13 protein kinases, 26 phosphorylated metabolic enzymes, and 35 allosteric effectors, resulting in quantitative changes in 44 metabolites. Analysis of the network reveals that insulin induces phosphorylation and activation of liver-type phosphofructokinase 1, thereby controlling a key reaction in glycolysis. We thus provide a versatile method of reconstruction of signal flow through the network using phosphoproteome and metabolome data.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
Yugi2014 - Insulin induced signalling (PFKLphosphorylation) - model 2
Insulin induces phosphorylation and activation of liver-type phosphofructokinase 1, which thereby controls a key reaction in glycolysis. This mechanism is revealed using the mathematical model. In this model, the PFKL phosphorylation time courses are calculation from the signalling pathway model developed by Kubata et al. (2012) ( MODEL1204060000 - Kubota2012_InsulinAction_AKTpathway).
Author's Note: Katsuyuki Yugi thank Akira Funahashi (Keio University, Japan) for his kind advice in converting the model from MATLAB to SBML.
Yugi K, Kubota H, Toyoshima Y, Noguchi R, Kawata K, Komori Y, Uda S, Kunida K, Tomizawa Y, Funato Y, Miki H, Matsumoto M, Nakayama KI, Kashikura K, Endo K, Ikeda K, Soga T, Kuroda S.
Cell Rep 2014 Aug; 8(4): 1171-1183
Abstract:
Cellular homeostasis is regulated by signals through multiple molecular networks that include protein phosphorylation and metabolites. However, where and when the signal flows through a network and regulates homeostasis has not been explored. We have developed a reconstruction method for the signal flow based on time-course phosphoproteome and metabolome data, using multiple databases, and have applied it to acute action of insulin, an important hormone for metabolic homeostasis. An insulin signal flows through a network, through signaling pathways that involve 13 protein kinases, 26 phosphorylated metabolic enzymes, and 35 allosteric effectors, resulting in quantitative changes in 44 metabolites. Analysis of the network reveals that insulin induces phosphorylation and activation of liver-type phosphofructokinase 1, thereby controlling a key reaction in glycolysis. We thus provide a versatile method of reconstruction of signal flow through the network using phosphoproteome and metabolome data.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
Yuraszeck TM, Neveu P, Rodriguez-Fernandez M, Robinson A, Kosik KS, Doyle FJ 3rd.
PLoS Comput. Biol. 2010; 6(11): e1000997
Abstract:
The multifactorial nature of disease motivates the use of systems-level analyses to understand their pathology. We used a systems biology approach to study tau aggregation, one of the hallmark features of Alzheimer's disease. A mathematical model was constructed to capture the current state of knowledge concerning tau's behavior and interactions in cells. The model was implemented in silico in the form of ordinary differential equations. The identifiability of the model was assessed and parameters were estimated to generate two cellular states: a population of solutions that corresponds to normal tau homeostasis and a population of solutions that displays aggregation-prone behavior. The model of normal tau homeostasis was robust to perturbations, and disturbances in multiple processes were required to achieve an aggregation-prone state. The aggregation-prone state was ultrasensitive to perturbations in diverse subsets of networks. Tau aggregation requires that multiple cellular parameters are set coordinately to a set of values that drive pathological assembly of tau. This model provides a foundation on which to build and increase our understanding of the series of events that lead to tau aggregation and may ultimately be used to identify critical intervention points that can direct the cell away from tau aggregation to aid in the treatment of tau-mediated (or related) aggregation diseases including Alzheimer's.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
Qi2013 - IL-6 and IFN crosstalk model(non-competitive)
This model [BIOMD0000000543]describes the crosstalk between IFN-gamma and IL-6 inducedsignalling; it aims to outline mechanisms and factors that maycontrol the interaction between both signalling pathways,discussing a role of heterodimer formation in signallingdysfunction.
To account for the possibility of different IFNR and gp130binding sites for STAT1 and STAT3, model 1 [BIOMD0000000543]assumes that there is no competition between STAT1 and STAT3 forthe receptor complexes (includes two extra reactions). The reverse of this is true in model 2 [BIOMD0000000544]where it generally is assumed that there is competition betweenSTAT1 and STAT3 for the receptor complexes.
Qi YF, Huang YX, Wang HY, Zhang Y, Bao YL, Sun LG, Wu Y, Yu CL, Song ZB, Zheng LH, Sun Y, Wang GN, Li YX.
BMC Bioinformatics 2013; 14: 41
Abstract:
BACKGROUND: Interferon-gamma (IFN-gamma) and interleukin-6 (IL-6) are multifunctional cytokines that regulate immune responses, cell proliferation, and tumour development and progression, which frequently have functionally opposing roles. The cellular responses to both cytokines are activated via the Janus kinase/signal transducer and activator of transcription (JAK/STAT) pathway. During the past 10 years, the crosstalk mechanism between the IFN-gamma and IL-6 pathways has been studied widely and several biological hypotheses have been proposed, but the kinetics and detailed crosstalk mechanism remain unclear. RESULTS: Using established mathematical models and new experimental observations of the crosstalk between the IFN-gamma and IL-6 pathways, we constructed a new crosstalk model that considers three possible crosstalk levels: (1) the competition between STAT1 and STAT3 for common receptor docking sites; (2) the mutual negative regulation between SOCS1 and SOCS3; and (3) the negative regulatory effects of the formation of STAT1/3 heterodimers. A number of simulations were tested to explore the consequences of cross-regulation between the two pathways. The simulation results agreed well with the experimental data, thereby demonstrating the effectiveness and correctness of the model. CONCLUSION: In this study, we developed a crosstalk model of the IFN-gamma and IL-6 pathways to theoretically investigate their cross-regulation mechanism. The simulation experiments showed the importance of the three crosstalk levels between the two pathways. In particular, the unbalanced competition between STAT1 and STAT3 for IFNR and gp130 led to preferential activation of IFN-gamma and IL-6, while at the same time the formation of STAT1/3 heterodimers enhanced preferential signal transduction by sequestering a fraction of the activated STATs. The model provided a good explanation of the experimental observations and provided insights that may inform further research to facilitate a better understanding of the cross-regulation mechanism between the two pathways.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
This model [BIOMD0000000544]describes the crosstalk between IFN-gamma and IL-6 inducedsignalling; it aims to outline mechanisms and factors that maycontrol the interaction between both signalling pathways,discussing a role of heterodimer formation in signallingdysfunction.
To account for the possibility of different IFNR and gp130binding sites for STAT1 and STAT3, model 1 [BIOMD0000000543]assumes that there is no competition between STAT1 and STAT3 forthe receptor complexes (includes two extra reactions). The reverse of this is true in model 2 [BIOMD0000000544]where it generally is assumed that there is competition betweenSTAT1 and STAT3 for the receptor complexes.
Qi YF, Huang YX, Wang HY, Zhang Y, Bao YL, Sun LG, Wu Y, Yu CL, Song ZB, Zheng LH, Sun Y, Wang GN, Li YX.
BMC Bioinformatics 2013; 14: 41
Abstract:
BACKGROUND: Interferon-gamma (IFN-gamma) and interleukin-6 (IL-6) are multifunctional cytokines that regulate immune responses, cell proliferation, and tumour development and progression, which frequently have functionally opposing roles. The cellular responses to both cytokines are activated via the Janus kinase/signal transducer and activator of transcription (JAK/STAT) pathway. During the past 10 years, the crosstalk mechanism between the IFN-gamma and IL-6 pathways has been studied widely and several biological hypotheses have been proposed, but the kinetics and detailed crosstalk mechanism remain unclear. RESULTS: Using established mathematical models and new experimental observations of the crosstalk between the IFN-gamma and IL-6 pathways, we constructed a new crosstalk model that considers three possible crosstalk levels: (1) the competition between STAT1 and STAT3 for common receptor docking sites; (2) the mutual negative regulation between SOCS1 and SOCS3; and (3) the negative regulatory effects of the formation of STAT1/3 heterodimers. A number of simulations were tested to explore the consequences of cross-regulation between the two pathways. The simulation results agreed well with the experimental data, thereby demonstrating the effectiveness and correctness of the model. CONCLUSION: In this study, we developed a crosstalk model of the IFN-gamma and IL-6 pathways to theoretically investigate their cross-regulation mechanism. The simulation experiments showed the importance of the three crosstalk levels between the two pathways. In particular, the unbalanced competition between STAT1 and STAT3 for IFNR and gp130 led to preferential activation of IFN-gamma and IL-6, while at the same time the formation of STAT1/3 heterodimers enhanced preferential signal transduction by sequestering a fraction of the activated STATs. The model provided a good explanation of the experimental observations and provided insights that may inform further research to facilitate a better understanding of the cross-regulation mechanism between the two pathways.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
Ouyang X, Huang X, Jin X, Chen Z, Yang P, Ge H, Li S, Deng XW.
Proc. Natl. Acad. Sci. U.S.A. 2014 Aug; 111(31): 11539-11544
Abstract:
Long-wavelength and low-fluence UV-B light is an informational signal known to induce photomorphogenic development in plants. Using the model plant Arabidopsis thaliana, a variety of factors involved in UV-B-specific signaling have been experimentally characterized over the past decade, including the UV-B light receptor UV resistance locus 8; the positive regulators constitutive photomorphogenesis 1 and elongated hypocotyl 5; and the negative regulators cullin4, repressor of UV-B photomorphogenesis 1 (RUP1), and RUP2. Individual genetic and molecular studies have revealed that these proteins function in either positive or negative regulatory capacities for the sufficient and balanced transduction of photomorphogenic UV-B signal. Less is known, however, regarding how these signaling events are systematically linked. In our study, we use a systems biology approach to investigate the dynamic behaviors and correlations of multiple signaling components involved in Arabidopsis UV-B-induced photomorphogenesis. We define a mathematical representation of photomorphogenic UV-B signaling at a temporal scale. Supplemented with experimental validation, our computational modeling demonstrates the functional interaction that occurs among different protein complexes in early and prolonged response to photomorphogenic UV-B.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
Seasonal and pandemic influenza A virus (IAV) continues to be a public health threat. However, we lack a detailed and quantitative understanding of the immune response kinetics to IAV infection and which biological parameters most strongly influence infection outcomes. To address these issues, we use modeling approaches combined with experimental data to quantitatively investigate the innate and adaptive immune responses to primary IAV infection. Mathematical models were developed to describe the dynamic interactions between target (epithelial) cells, influenza virus, cytotoxic T lymphocytes (CTLs), and virus-specific IgG and IgM. IAV and immune kinetic parameters were estimated by fitting models to a large data set obtained from primary H3N2 IAV infection of 340 mice. Prior to a detectable virus-specific immune response (before day 5), the estimated half-life of infected epithelial cells is approximately 1.2 days, and the half-life of free infectious IAV is approximately 4 h. During the adaptive immune response (after day 5), the average half-life of infected epithelial cells is approximately 0.5 days, and the average half-life of free infectious virus is approximately 1.8 min. During the adaptive phase, model fitting confirms that CD8(+) CTLs are crucial for limiting infected cells, while virus-specific IgM regulates free IAV levels. This may imply that CD4 T cells and class-switched IgG antibodies are more relevant for generating IAV-specific memory and preventing future infection via a more rapid secondary immune response. Also, simulation studies were performed to understand the relative contributions of biological parameters to IAV clearance. This study provides a basis to better understand and predict influenza virus immunity.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
Talemi2014 - Arsenic toxicity anddetoxification mechanisms in yeast
The model implements arsenite (AsIII)transport regulation, its distribution within main cellular AsIIIpools and detoxification. The intracellular As pools considered arefree AsIII (AsIIIin), protein-bound AsIII (AsIIIprot), glutathioneconjugated AsIII (AsGS3) and vacuolar sequestered AsIII (vAsGS3).
Talemi SR, Jacobson T, Garla V, Navarrete C, Wagner A, Tam\u00e1s MJ, Schaber J.
Mol. Microbiol. 2014 Jun; 92(6): 1343-1356
Abstract:
Arsenic has a dual role as causative and curative agent of human disease. Therefore, there is considerable interest in elucidating arsenic toxicity and detoxification mechanisms. By an ensemble modelling approach, we identified a best parsimonious mathematical model which recapitulates and predicts intracellular arsenic dynamics for different conditions and mutants, thereby providing novel insights into arsenic toxicity and detoxification mechanisms in yeast, which could partly be confirmed experimentally by dedicated experiments. Specifically, our analyses suggest that: (i) arsenic is mainly protein-bound during short-term (acute) exposure, whereas glutathione-conjugated arsenic dominates during long-term (chronic) exposure, (ii) arsenic is not stably retained, but can leave the vacuole via an export mechanism, and (iii) Fps1 is controlled by Hog1-dependent and Hog1-independent mechanisms during arsenite stress. Our results challenge glutathione depletion as a key mechanism for arsenic toxicity and instead suggest that (iv) increased glutathione biosynthesis protects the proteome against the damaging effects of arsenic and that (v) widespread protein inactivation contributes to the toxicity of this metalloid. Our work in yeast may prove useful to elucidate similar mechanisms in higher eukaryotes and have implications for the use of arsenic in medical therapy.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
Sneppen K, Lizana L, Jensen MH, Pigolotti S, Otzen D.
Phys Biol 2009; 6(3): 036005
Abstract:
In Parkinson's disease (PD), there is evidence that alpha-synuclein (alphaSN) aggregation is coupled to dysfunctional or overburdened protein quality control systems, in particular the ubiquitin-proteasome system. Here, we develop a simple dynamical model for the on-going conflict between alphaSN aggregation and the maintenance of a functional proteasome in the healthy cell, based on the premise that proteasomal activity can be titrated out by mature alphaSN fibrils and their protofilament precursors. In the presence of excess proteasomes the cell easily maintains homeostasis. However, when the ratio between the available proteasome and the alphaSN protofilaments is reduced below a threshold level, we predict a collapse of homeostasis and onset of oscillations in the proteasome concentration. Depleted proteasome opens for accumulation of oligomers. Our analysis suggests that the onset of PD is associated with a proteasome population that becomes occupied in periodic degradation of aggregates. This behavior is found to be the general state of a proteasome/chaperone system under pressure, and suggests new interpretations of other diseases where protein aggregation could stress elements of the protein quality control system.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
Baker2013 - Cytokine Mediated Inflammation inRheumatoid Arthritis - Age Dependant
This model by Baker M. 2013, describesthe interaction between pro and anti-inflammatory cytokinesignalling in rheumatoid arthritis.
Using two ordinary differential equations, the first model [BIOMD0000000550]analyses bifurcation and describes different pathological states byaltering inflammatory regulation parameters. The second model [BIOMD0000000549]includes the effect that ageing has on pro-inflammatory signalling,allowing for time-dependant properties and disease progression tobe observed. The author also describes potential dosing forreversal of the disease state.
Baker M, Denman-Johnson S, Brook BS, Gaywood I, Owen MR.
Math Med Biol 2013 Dec; 30(4): 311-337
Abstract:
Rheumatoid arthritis (RA) is a chronic inflammatory disease preferentially affecting the joints and leading, if untreated, to progressive joint damage and disability. Cytokines, a group of small inducible proteins, which act as intercellular messengers, are key regulators of the inflammation that characterizes RA. They can be classified into pro-inflammatory and anti-inflammatory groups. Numerous cytokines have been implicated in the regulation of RA with complex up and down regulatory interactions. This paper considers a two-variable model for the interactions between pro-inflammatory and anti-inflammatory cytokines, and demonstrates that mathematical modelling may be used to investigate the involvement of cytokines in the disease process. The model displays a range of possible behaviours, such as bistability and oscillations, which are strongly reminiscent of the behaviour of RA e.g. genetic susceptibility and remitting-relapsing disease. We also show that the dose regimen as well as the dose level are important factors in RA treatments.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
This model by Baker M. 2013, describesthe interaction between pro and anti-inflammatory cytokinesignalling in rheumatoid arthritis.
Using two ordinary differential equations, the first model [BIOMD0000000550]analyses bifurcation and describes different pathological states byaltering inflammatory regulation parameters. The second model [BIOMD0000000549]includes the effect that ageing has on pro-inflammatory signalling,allowing for time-dependant properties and disease progression tobe observed. The author also describes potential dosing forreversal of the disease state.
Baker M, Denman-Johnson S, Brook BS, Gaywood I, Owen MR.
Math Med Biol 2013 Dec; 30(4): 311-337
Abstract:
Rheumatoid arthritis (RA) is a chronic inflammatory disease preferentially affecting the joints and leading, if untreated, to progressive joint damage and disability. Cytokines, a group of small inducible proteins, which act as intercellular messengers, are key regulators of the inflammation that characterizes RA. They can be classified into pro-inflammatory and anti-inflammatory groups. Numerous cytokines have been implicated in the regulation of RA with complex up and down regulatory interactions. This paper considers a two-variable model for the interactions between pro-inflammatory and anti-inflammatory cytokines, and demonstrates that mathematical modelling may be used to investigate the involvement of cytokines in the disease process. The model displays a range of possible behaviours, such as bistability and oscillations, which are strongly reminiscent of the behaviour of RA e.g. genetic susceptibility and remitting-relapsing disease. We also show that the dose regimen as well as the dose level are important factors in RA treatments.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
Das R, Nachbar RB, Edelstein-Keshet L, Saltzman JS, Wiener MC, Bagchi A, Bailey J, Coombs D, Simon AJ, Hargreaves RJ, Cook JJ.
Bull. Math. Biol. 2011 Jan; 73(1): 230-247
Abstract:
Aggregation of the small peptide amyloid beta (A?) into oligomers and fibrils in the brain is believed to be a precursor to Alzheimer's disease. A? is produced via multiple proteolytic cleavages of amyloid precursor protein (APP), mediated by the enzymes ?- and ?-secretase. In this study, we examine the temporal dynamics of soluble (unaggregated) A? in the plasma and cerebral-spinal fluid (CSF) of rhesus monkeys treated with different oral doses of a ?-secretase inhibitor. A dose-dependent reduction of A? concentration was observed within hours of drug ingestion, for all doses tested. A? concentration in the CSF returned to its predrug level over the monitoring period. In contrast, A? concentration in the plasma exhibited an unexpected overshoot to as high as 200% of the predrug concentration, and this overshoot persisted as late as 72 hours post-drug ingestion. To account for these observations, we proposed and analyzed a minimal physiological model for A? dynamics that could fit the data. Our analysis suggests that the overshoot arises from the attenuation of an A? clearance mechanism, possibly due to the inhibitor. Our model predicts that the efficacy of A? clearance recovers to its basal (pretreatment) value with a characteristic time of >48 hours, matching the time-scale of the overshoot. These results point to the need for a more detailed investigation of soluble A? clearance mechanisms and their interaction with A?-reducing drugs.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
We describe a two-component positive-feedback system that could account for the large reduction of acetylcholine that is characteristic of patients with Alzheimer's disease (AD). One component is beta-amyloid-induced apoptosis of cholinergic cells, leading to a decrease in acetylcholine. The other component is an increase in the concentration of beta-amyloid in response to a decrease in acetylcholine. We describe each mechanism with a differential equation, and then solve the two equations numerically. The solution provides a description of the time course of the reduction of acetylcholine in AD patients that is consistent with epidemiological data. This model may also provide an explanation for the significant, but lesser, decrease of other neurotransmitters that is characteristic of AD.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
We present a hypothesis for the loss of acetylcholine in Alzheimer's disease that is based on two recent experimental results: that beta-amyloid causes leakage of choline across cell membranes and that decreased production of acetylcholine increases the production of beta-amyloid. According to the hypothesis, an increase in beta-amyloid concentration caused by proteolysis of the amyloid precursor protein results in an increase in the leakage of choline out of cells. This leads to a reduction in intracellular choline concentration and hence a reduction in acetylcholine production. The reduction in acetylcholine production, in turn, causes an increase in the concentration of beta-amyloid. The resultant positive feedback between decreased acetylcholine and increased beta-amyloid accelerates the loss of acetylcholine. We compare the predictions of the choline-leakage hypothesis with a number of experimental observations. We also approximate it with a pair of ordinary differential equations. The solutions of these equations indicate that the loss of acetylcholine is very sensitive to the initial rate of beta-amyloid production.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
This model was taken from the\u00a0 CellMLrepository\u00a0andautomatically converted to SBML.\u00a0\u00a0Following thesubmission the parameters are manually encoded and annotated asspices and global quantities by BioModels curators.\u00a0
An integrative, systems approach to the modelling of brain energy metabolism is presented. Mechanisms such as glutamate cycling between neurons and astrocytes and glycogen storage in astrocytes have been implemented. A unique feature of the model is its calibration using in vivo data of brain glucose and lactate from freely moving rats under various stimuli. The model has been used to perform simulated perturbation experiments that show that glycogen breakdown in astrocytes is significantly activated during sensory (tail pinch) stimulation. This mechanism provides an additional input of energy substrate during high consumption phases. By way of validation, data from the perfusion of 50 microM propranolol in the rat brain was compared with the model outputs. Propranolol affects the glucose dynamics during stimulation, and this was accurately reproduced in the model by a reduction in the glycogen breakdown in astrocytes. The model's predictive capacity was verified by using data from a sensory stimulation (restraint) that was not used for model calibration. Finally, a sensitivity analysis was conducted on the model parameters, this showed that the control of energy metabolism and transport processes are critical in the metabolic behaviour of cerebral tissue.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
Under favorable conditions, many proteins can assemble into macroscopically large aggregates such as the amyloid fibrils that are associated with Alzheimer's, Parkinson's, and other neurological and systemic diseases. The overall process of protein aggregation is characterized by initial lag time during which no detectable aggregation occurs in the solution and by maximal aggregation rate at which the dissolved protein converts into aggregates. In this study, the correlation between the lag time and the maximal rate of protein aggregation is analyzed. It is found that the product of these two quantities depends on a single numerical parameter, the kinetic index of the curve quantifying the time evolution of the fraction of protein aggregated. As this index depends relatively little on the conditions and/or system studied, our finding provides insight into why for many experiments the values of the product of the lag time and the maximal aggregation rate are often equal or quite close to each other. It is shown how the kinetic index is related to a basic kinetic parameter of a recently proposed theory of protein aggregation.
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Amyloid-? (A?) is produced by the consecutive cleavage of amyloid precursor protein (APP) first by ?-secretase, generating C99, and then by ?-secretase. APP is also cleaved by ?-secretase. It is hypothesized that reducing the production of A? in the brain may slow the progression of Alzheimer disease. Therefore, different ?-secretase inhibitors have been developed to reduce A? production. Paradoxically, it has been shown that low to moderate inhibitor concentrations cause a rise in A? production in different cell lines, in different animal models, and also in humans. A mechanistic understanding of the A? rise remains elusive. Here, a minimal mathematical model has been developed that quantitatively describes the A? dynamics in cell lines that exhibit the rise as well as in cell lines that do not. The model includes steps of APP processing through both the so-called amyloidogenic pathway and the so-called non-amyloidogenic pathway. It is shown that the cross-talk between these two pathways accounts for the increase in A? production in response to inhibitor, i.e. an increase in C99 will inhibit the non-amyloidogenic pathway, redirecting APP to be cleaved by ?-secretase, leading to an additional increase in C99 that overcomes the loss in ?-secretase activity. With a minor extension, the model also describes plasma A? profiles observed in humans upon dosing with a ?-secretase inhibitor. In conclusion, this mechanistic model rationalizes a series of experimental results that spans from in vitro to in vivo and to humans. This has important implications for the development of drugs targeting A? production in Alzheimer disease.
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Reiterer V, Fey D, Kolch W, Kholodenko BN, Farhan H.
Proc. Natl. Acad. Sci. U.S.A. 2013 Jul; 110(31): E2934-43
Abstract:
Serine/threonine/tyrosine-interacting protein (STYX) is a catalytically inactive member of the dual-specificity phosphatases (DUSPs) family. Whereas the role of DUSPs in cellular signaling is well explored, the function of STYX is still unknown. Here, we identify STYX as a spatial regulator of ERK signaling. We used predictive-model simulation to test several hypotheses for possible modes of STYX action. We show that STYX localizes to the nucleus, competes with nuclear DUSP4 for binding to ERK, and acts as a nuclear anchor that regulates ERK nuclear export. Depletion of STYX increases ERK activity in both cytosol and nucleus. Importantly, depletion of STYX causes an ERK-dependent fragmentation of the Golgi apparatus and inhibits Golgi polarization and directional cell migration. Finally, we show that overexpression of STYX reduces ERK1/2 activation, thereby blocking PC12 cell differentiation. Overall, our results identify STYX as an important regulator of ERK1/2 signaling critical for cell migration and PC12 cell differentiation.
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Previous article on the integrative modelling of Parkinson's disease (PD) described a mathematical model with properties suggesting that PD pathogenesis is associated with a feedback-induced biochemical bistability. In this article, the authors show that the dynamics of the mathematical model can be extracted and distilled into an equivalent two-state feedback motif whose stability properties are controlled by multi-factorial combinations of risk factors and genetic mutations associated with PD. Based on this finding, the authors propose a principle for PD pathogenesis in the form of the switch-like transition of a bistable feedback process from 'healthy' homeostatic levels of reactive oxygen species and the protein ?-synuclein, to an alternative 'disease' state in which concentrations of both molecules are stable at the damagingly high-levels associated with PD. The bistability is analysed using the rate curves and steady-state response characteristics of the feedback motif. In particular, the authors show how a bifurcation in the feedback motif marks the pathogenic moment at which the 'healthy' state is lost and the 'disease' state is initiated. Further analysis shows how known risks (such as: age, toxins and genetic predisposition) modify the stability characteristics of the feedback motif in a way that is compatible with known features of PD, and which explain properties such as: multi-factorial causality, variability in susceptibility and severity, multi-timescale progression and the special cases of familial Parkinson's and Parkinsonian symptoms induced purely by toxic stress.
Stress of 2.6 obtained by optimization(parameter S1) was imposed between days 10 and 150 in order toreproduce the Figure.
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Ouzounoglou E, Kalamatianos D, Emmanouilidou E, Xilouri M, Stefanis L, Vekrellis K, Manolakos ES.
BMC Syst Biol 2014; 8: 54
Abstract:
BACKGROUND: Alpha-synuclein (ASYN) is central in Parkinson's disease (PD) pathogenesis. Converging pieces of evidence suggest that the levels of ASYN expression play a critical role in both familial and sporadic Parkinson's disease. ASYN fibrils are the main component of inclusions called Lewy Bodies (LBs) which are found mainly in the surviving neurons of the substantia nigra. Despite the accumulated knowledge regarding the involvement of ASYN in molecular mechanisms underlying the development of PD, there is much information missing which prevents understanding the causes of the disease and how to stop its progression. RESULTS: Using a Systems Biology approach, we develop a biomolecular reactions model that describes the intracellular ASYN dynamics in relation to overexpression, post-translational modification, oligomerization and degradation of the protein. Especially for the proteolysis of ASYN, the model takes into account the biological knowledge regarding the contribution of Chaperone Mediated Autophagy (CMA), macro-autophagic and proteasome pathways in the protein's degradation. Importantly, inhibitory phenomena, caused by ASYN, concerning CMA (more specifically the lysosomal-associated membrane protein 2a, abbreviated as Lamp2a receptor, which is the rate limiting step of CMA) and the proteasome are carefully modeled. The model is validated by simulation studies of known experimental overexpression data from SH-SY5Y cells and the unknown model parameters are estimated either computationally or by experimental fitting. The calibrated model is then tested under three hypothetical intervention scenarios and in all cases predicts increased cell viability that agrees with experimental evidence. The biomodel has been annotated and is made available in SBML format. CONCLUSIONS: The mathematical model presented here successfully simulates the dynamic phenomena of ASYN overexpression and oligomerization and predicts the biological system's behavior in a number of scenarios not used for model calibration. It allows, for the first time, to qualitatively estimate the protein levels that are capable of deregulating proteolytic homeostasis. In addition, it can help form new hypotheses for intervention that could be tested experimentally.
Note: The model contains reactions of species located in different compartments. If the model is applied using volume sizes unequal to one, an extension of the model might be reasonable to guarantee mass conservation.
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Wang Hui1, David A Young1, Andrew D Rowan1, Xin Xu2, Tim E Cawston1, Carole J Proctor1,3
Annals of the Rheumatic Diseases
Abstract:
Objective: To use a computational approach to investigate the cellular and extracellular matrix changes that occur with age in the knee joints of mice. Methods: Knee joints from an inbred C57/BL1/6 (ICRFa) mouse colony were harvested at 3\u201330?months of age. Sections were stained with H&E, Safranin-O, Picro-sirius red and antibodies to matrix metalloproteinase-13 (MMP-13), nitrotyrosine, LC-3B, Bcl-2, and cleaved type II collagen used for immunohistochemistry. Based on this and other data from the literature, a computer simulation model was built using the Systems Biology Markup Language using an iterative approach of data analysis and modelling. Individual parameters were subsequently altered to assess their effect on the model. Results: A progressive loss of cartilage matrix occurred with age. Nitrotyrosine, MMP-13 and anaplastic lymphoma kinase (ALK1) staining in cartilage increased with age with a concomitant decrease in LC-3B and Bcl-2. Stochastic simulations from the computational model showed a good agreement with these data, once transforming growth factor-? signalling via ALK1/ALK5 receptors was included. Oxidative stress and the interleukin 1 pathway were identified as key factors in driving the cartilage breakdown associated with ageing. Conclusions: A progressive loss of cartilage matrix and cellularity occurs with age. This is accompanied with increased levels of oxidative stress, apoptosis and MMP-13 and a decrease in chondrocyte autophagy. These changes explain the marked predisposition of joints to develop osteoarthritis with age. Computational modelling provides useful insights into the underlying mechanisms involved in age-related changes in musculoskeletal tissues.
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A possible therapeutic strategy for amyloid diseases involves the use of small molecule compounds to inhibit protein assembly into insoluble aggregates. According to the recently proposed Crystallization-Like Model, the kinetics of amyloid fibrillization can be retarded by decreasing the frequency of new fibril formation or by decreasing the elongation rate of existing fibrils. To the compounds that affect the nucleation and/or the growth steps we call true inhibitors. An apparent inhibition mechanism may however result from the alteration of thermodynamic properties such as the solubility of the amyloidogenic protein. Apparent inhibitors markedly influence protein aggregation kinetics measured in vitro, yet they are likely to lead to disappointing results when tested in vivo. This is because cells and tissues media are in general much more buffered against small variations in composition than the solutions prepared in lab. Here we show how to discriminate between true and apparent inhibition mechanisms from experimental data on protein aggregation kinetics. The goal is to be able to identify false positives much earlier during the drug development process.
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Chaouiya C, B\u00e9renguier D, Keating SM, Naldi A, van Iersel MP, Rodriguez N, Dr\u00e4ger A, B\u00fcchel F, Cokelaer T, Kowal B, Wicks B, Gon\u00e7alves E, Dorier J, Page M, Monteiro PT, von Kamp A, Xenarios I, de Jong H, Hucka M, Klamt S, Thieffry D, Le Nov\u00e8re N, Saez-Rodriguez J, Helikar T.
BMC Syst Biol 2013; 7: 135
Abstract:
BACKGROUND: Qualitative frameworks, especially those based on the logical discrete formalism, are increasingly used to model regulatory and signalling networks. A major advantage of these frameworks is that they do not require precise quantitative data, and that they are well-suited for studies of large networks. While numerous groups have developed specific computational tools that provide original methods to analyse qualitative models, a standard format to exchange qualitative models has been missing. RESULTS: We present the Systems Biology Markup Language (SBML) Qualitative Models Package (\"qual\"), an extension of the SBML Level 3 standard designed for computer representation of qualitative models of biological networks. We demonstrate the interoperability of models via SBML qual through the analysis of a specific signalling network by three independent software tools. Furthermore, the collective effort to define the SBML qual format paved the way for the development of LogicalModel, an open-source model library, which will facilitate the adoption of the format as well as the collaborative development of algorithms to analyse qualitative models. CONCLUSIONS: SBML qual allows the exchange of qualitative models among a number of complementary software tools. SBML qual has the potential to promote collaborative work on the development of novel computational approaches, as well as on the specification and the analysis of comprehensive qualitative models of regulatory and signalling networks.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
Gould PD, Ugarte N, Domijan M, Costa M, Foreman J, Macgregor D, Rose K, Griffiths J, Millar AJ, Finkenst\u00e4dt B, Penfield S, Rand DA, Halliday KJ, Hall AJ.
Mol. Syst. Biol. 2013; 9: 650
Abstract:
Circadian clocks exhibit 'temperature compensation', meaning that they show only small changes in period over a broad temperature range. Several clock genes have been implicated in the temperature-dependent control of period in Arabidopsis. We show that blue light is essential for this, suggesting that the effects of light and temperature interact or converge upon common targets in the circadian clock. Our data demonstrate that two cryptochrome photoreceptors differentially control circadian period and sustain rhythmicity across the physiological temperature range. In order to test the hypothesis that the targets of light regulation are sufficient to mediate temperature compensation, we constructed a temperature-compensated clock model by adding passive temperature effects into only the light-sensitive processes in the model. Remarkably, this model was not only capable of full temperature compensation and consistent with mRNA profiles across a temperature range, but also predicted the temperature-dependent change in the level of LATE ELONGATED HYPOCOTYL, a key clock protein. Our analysis provides a systems-level understanding of period control in the plant circadian oscillator.
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Curcumin is a natural compound obtained from turmeric, and is well known for its pharmacological effects. In this work, we design a heterologous pathway for industrial production of curcumin in Escherichia coli. A kinetic model of the pathway is then developed and connected to a kinetic model of the central carbon metabolism of E. coli. This model is used for optimization of the mutant strain through a rational design approach, and two manipulation targets are identified for overexpression. Dynamic simulations are then performed to compare the curcumin production profiles of the different mutant strains. Our results show that it is possible to obtain a significant improvement in the curcumin production rates with the proposed mutants. The kinetic model here developed can be an important framework to optimize curcumin production at an industrial scale and add value to its biomedical potential.
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The aggregation of proteins is believed to be intimately connected to many neurodegenerative disorders. We recently reported an \"Ockham's razor\"/minimalistic approach to analyze the kinetic data of protein aggregation using the Finke-Watzky (F-W) 2-step model of nucleation (A-->B, rate constant k(1)) and autocatalytic growth (A+B-->2B, rate constant k(2)). With that kinetic model we have analyzed 41 representative protein aggregation data sets in two recent publications, including amyloid beta, alpha-synuclein, polyglutamine, and prion proteins (Morris, A. M., et al. (2008) Biochemistry 47, 2413-2427; Watzky, M. A., et al. (2008) Biochemistry 47, 10790-10800). Herein we use the F-W model to reanalyze protein aggregation kinetic data obtained under the experimental conditions of variable temperature or pH 2.0 to 8.5. We provide the average nucleation (k(1)) and growth (k(2)) rate constants and correlations with variable temperature or varying pH for the protein alpha-synuclein. From the variable temperature data, activation parameters DeltaG(double dagger), DeltaH(double dagger), and DeltaS(double dagger) are provided for nucleation and growth, and those values are compared to the available parameters reported in the previous literature determined using an empirical method. Our activation parameters suggest that nucleation and growth are energetically similar for alpha-synuclein aggregation (DeltaG(double dagger)(nucleation)=23(3) kcal/mol; DeltaG(double dagger)(growth)=22(1) kcal/mol at 37 degrees C). From the variable pH data, the F-W analyses show a maximal k(1) value at pH approximately 3, as well as minimal k(1) near the isoelectric point (pI) of alpha-synuclein. Since solubility and net charge are minimized at the pI, either or both of these factors may be important in determining the kinetics of the nucleation step. On the other hand, the k(2) values increase with decreasing pH (i.e., do not appear to have a minimum or maximum near the pI) which, when combined with the k(1) vs. pH (and pI) data, suggest that solubility and charge are less important factors for growth, and that charge is important in the k(1), nucleation step of alpha-synuclein. The chemically well-defined nucleation (k(1)) rate constants obtained from the F-W analysis are, as expected, different than the 1/lag-time empirical constants previously obtained. However, k(2)x[A](0) (where k(2) is the rate constant for autocatalytic growth and [A](0) is the initial protein concentration) is related to the empirical constant, k(app) obtained previously. Overall, the average nucleation and average growth rate constants for alpha-synuclein aggregation as a function of pH and variable temperature have been quantitated. Those values support the previously suggested formation of a partially folded intermediate that promotes aggregation under high temperature or acidic conditions.
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The aggregation of proteins has been hypothesized to be an underlying cause of many neurological disorders including Alzheimer's, Parkinson's, and Huntington's diseases; protein aggregation is also important to normal life function in cases such as G to F-actin, glutamate dehydrogenase, and tubulin and flagella formation. For this reason, the underlying mechanism of protein aggregation, and accompanying kinetic models for protein nucleation and growth (growth also being called elongation, polymerization, or fibrillation in the literature), have been investigated for more than 50 years. As a way to concisely present the key prior literature in the protein aggregation area, Table 1 in the main text summarizes 23 papers by 10 groups of authors that provide 5 basic classes of mechanisms for protein aggregation over the period from 1959 to 2007. However, and despite this major prior effort, still lacking are both (i) anything approaching a consensus mechanism (or mechanisms), and (ii) a generally useful, and thus widely used, simplest/\"Ockham's razor\" kinetic model and associated equations that can be routinely employed to analyze a broader range of protein aggregation kinetic data. Herein we demonstrate that the 1997 Finke-Watzky (F-W) 2-step mechanism of slow continuous nucleation, A --> B (rate constant k1), followed by typically fast, autocatalytic surface growth, A + B --> 2B (rate constant k2), is able to quantitatively account for the kinetic curves from all 14 representative data sets of neurological protein aggregation found by a literature search (the prion literature was largely excluded for the purposes of this study in order provide some limit to the resultant literature that was covered). The F-W model is able to deconvolute the desired nucleation, k1, and growth, k2, rate constants from those 14 data sets obtained by four different physical methods, for three different proteins, and in nine different labs. The fits are generally good, and in many cases excellent, with R2 values >or=0.98 in all cases. As such, this contribution is the current record of the widest set of protein aggregation data best fit by what is also the simplest model offered to date. Also provided is the mathematical connection between the 1997 F-W 2-step mechanism and the 2000 3-step mechanism proposed by Sait\u00f4 and co-workers. In particular, the kinetic equation for Sait\u00f4's 3-step mechanism is shown to be mathematically identical to the earlier, 1997 2-step F-W mechanism under the 3 simplifying assumptions Sait\u00f4 and co-workers used to derive their kinetic equation. A list of the 3 main caveats/limitations of the F-W kinetic model is provided, followed by the main conclusions from this study as well as some needed future experiments.
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Liver regeneration is a tightly controlled process mainly achieved by proliferation of usually quiescent hepatocytes. The specific molecular mechanisms ensuring cell division only in response to proliferative signals such as hepatocyte growth factor (HGF) are not fully understood. Here, we combined quantitative time-resolved analysis of primary mouse hepatocyte proliferation at the single cell and at the population level with mathematical modeling. We showed that numerous G1/S transition components are activated upon hepatocyte isolation whereas DNA replication only occurs upon additional HGF stimulation. In response to HGF, Cyclin:CDK complex formation was increased, p21 rather than p27 was regulated, and Rb expression was enhanced. Quantification of protein levels at the restriction point showed an excess of CDK2 over CDK4 and limiting amounts of the transcription factor E2F-1. Analysis with our mathematical model revealed that T160 phosphorylation of CDK2 correlated best with growth factor-dependent proliferation, which we validated experimentally on both the population and the single cell level. In conclusion, we identified CDK2 phosphorylation as a gate-keeping mechanism to maintain hepatocyte quiescence in the absence of HGF.
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Dutta-Roy R, Rosenmund C, Edelstein SJ, Le Nov\u00e8re N.
PLoS ONE 2015; 10(1): e0116616
Abstract:
Modulation of the properties of AMPA receptors at the post-synaptic membrane is one of the main suggested mechanisms underlying fast synaptic transmission in the central nervous system of vertebrates. Electrophysiological recordings of single channels stimulated with agonists showed that both recombinant and native AMPA receptors visit multiple conductance states in an agonist concentration dependent manner. We propose an allosteric model of the multiple conductance states based on concerted conformational transitions of the four subunits, as an iris diaphragm. Our model predicts that the thermodynamic behaviour of the conductance states upon full and partial agonist stimulations can be described with increased affinity of receptors as they progress to higher conductance states. The model also predicts the existence of AMPA receptors in non-liganded conductive substates. However, the probability of spontaneous openings decreases with increasing conductances. Finally, we predict that the large conductance states are stabilized within the rise phase of a whole-cell EPSC in glutamatergic hippocampal neurons. Our model provides a mechanistic link between ligand concentration and conductance states that can explain thermodynamic and kinetic features of AMPA receptor gating.
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In order to improve the interpretation of functional neuroimaging data, we implemented a mathematical model of the coupling between membrane ionic currents, energy metabolism (i.e., ATP regeneration via phosphocreatine buffer effect, glycolysis, and mitochondrial respiration), blood-brain barrier exchanges, and hemodynamics. Various hypotheses were tested for the variation of the cerebral metabolic rate of oxygen (CMRO(2)): (H1) the CMRO(2) remains at its baseline level; (H2) the CMRO(2) is enhanced as soon as the cerebral blood flow (CBF) increases; (H3) the CMRO(2) increase depends on intracellular oxygen and pyruvate concentrations, and intracellular ATP/ADP ratio; (H4) in addition to hypothesis H3, the CMRO(2) progressively increases, due to the action of a second messenger. A good agreement with experimental data from magnetic resonance imaging and spectroscopy (MRI and MRS) was obtained when we simulated sustained and repetitive activation protocols using hypotheses (H3) or (H4), rather than hypotheses (H1) or (H2). Furthermore, by studying the effect of the variation of some physiologically important parameters on the time course of the modeled blood-oxygenation-level-dependent (BOLD) signal, we were able to formulate hypotheses about the physiological or biochemical significance of functional magnetic resonance data, especially the poststimulus undershoot and the baseline drift.
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The phosphotransferase system (PTS) is the sugar transportation machinery that is widely distributed in prokaryotes and is critical for enhanced production of useful metabolites. To increase the glucose uptake rate, we propose a rational strategy for designing the molecular architecture of the Escherichia coli glucose PTS by using a computer-aided design (CAD) system and verified the simulated results with biological experiments. CAD supports construction of a biochemical map, mathematical modeling, simulation, and system analysis. Assuming that the PTS aims at controlling the glucose uptake rate, the PTS was decomposed into hierarchical modules, functional and flux modules, and the effect of changes in gene expression on the glucose uptake rate was simulated to make a rational strategy of how the gene regulatory network is engineered. Such design and analysis predicted that the mlc knockout mutant with ptsI gene overexpression would greatly increase the specific glucose uptake rate. By using biological experiments, we validated the prediction and the presented strategy, thereby enhancing the specific glucose uptake rate.
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Costa RS, Hartmann A, Gaspar P, Neves AR, Vinga S.
Mol Biosyst 2014 Mar; 10(3): 628-639
Abstract:
Biomedical research and biotechnological production are greatly benefiting from the results provided by the development of dynamic models of microbial metabolism. Although several kinetic models of Lactococcus lactis (a Lactic Acid Bacterium (LAB) commonly used in the dairy industry) have been developed so far, most of them are simplified and focus only on specific metabolic pathways. Therefore, the application of mathematical models in the design of an engineering strategy for the production of industrially important products by L. lactis has been very limited. In this work, we extend the existing kinetic model of L. lactis central metabolism to include industrially relevant production pathways such as mannitol and 2,3-butanediol. In this way, we expect to study the dynamics of metabolite production and make predictive simulations in L. lactis. We used a system of ordinary differential equations (ODEs) with approximate Michaelis-Menten-like kinetics for each reaction, where the parameters were estimated from multivariate time-series metabolite concentrations obtained by our team through in vivo Nuclear Magnetic Resonance (NMR). The results show that the model captures observed transient dynamics when validated under a wide range of experimental conditions. Furthermore, we analyzed the model using global perturbations, which corroborate experimental evidence about metabolic responses upon enzymatic changes. These include that mannitol production is very sensitive to lactate dehydrogenase (LDH) in the wild type (W.T.) strain, and to mannitol phosphoenolpyruvate: a phosphotransferase system (PTS(Mtl)) in a LDH mutant strain. LDH reduction has also a positive control on 2,3-butanediol levels. Furthermore, it was found that overproduction of mannitol-1-phosphate dehydrogenase (MPD) in a LDH/PTS(Mtl) deficient strain can increase the mannitol levels. The results show that this model has prediction capability over new experimental conditions and offers promising possibilities to elucidate the effect of alterations in the main metabolism of L. lactis, with application in strain optimization.
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HIV infection leads to two cell fates, the viral productive state or viral latency (a reversible non-productive state). HIV latency is relevant because infected active CD4+ T-lymphocytes can reach a resting memory state in which the provirus remains silent for long periods of time. Despite experimental and theoretical efforts, the causal molecular mechanisms responsible for HIV latency are only partially understood. Studies have determined that HIV latency is influenced by the innate immune response carried out by cell restriction factors that inhibit the postintegration steps in the virus replication cycle. In this study, we present a mathematical study that combines deterministic and stochastic approaches to analyze the interactions between HIV proteins and the innate immune response. Using wide ranges of parameter values, we observed the following: (1) a phenomenological description of the viral productive and latent cell phenotypes is obtained by bistable and bimodal dynamics, (2) biochemical noise reduces the probability that an infected cell adopts the latent state, (3) the effects of the innate immune response enhance the HIV latency state, (4) the conditions of the cell before infection affect the latent phenotype, i.e., the existing expression of cell restriction factors propitiates HIV latency, and existing expression of HIV proteins reduces HIV latency.
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Calmodulin is a calcium-binding protein ubiquitous in eukaryotic cells, involved in numerous calcium-regulated biological phenomena, such as synaptic plasticity, muscle contraction, cell cycle, and circadian rhythms. It exibits a characteristic dumbell shape, with two globular domains (N- and C-terminal lobe) joined by a linker region. Each lobe can take alternative conformations, affected by the binding of calcium and target proteins. Calmodulin displays considerable functional flexibility due to its capability to bind different targets, often in a tissue-specific fashion. In various specific physiological environments (e.g. skeletal muscle, neuron dendritic spines) several targets compete for the same calmodulin pool, regulating its availability and affinity for calcium. In this work, we sought to understand the general principles underlying calmodulin modulation by different target proteins, and to account for simultaneous effects of multiple competing targets, thus enabling a more realistic simulation of calmodulin-dependent pathways. We built a mechanistic allosteric model of calmodulin, based on an hemiconcerted framework: each calmodulin lobe can exist in two conformations in thermodynamic equilibrium, with different affinities for calcium and different affinities for each target. Each lobe was allowed to switch conformation on its own. The model was parameterised and validated against experimental data from the literature. In spite of its simplicity, a two-state allosteric model was able to satisfactorily represent several sets of experiments, in particular the binding of calcium on intact and truncated calmodulin and the effect of different skMLCK peptides on calmodulin's saturation curve. The model can also be readily extended to include multiple targets. We show that some targets stabilise the low calcium affinity T state while others stabilise the high affinity R state. Most of the effects produced by calmodulin targets can be explained as modulation of a pre-existing dynamic equilibrium between different conformations of calmodulin's lobes, in agreement with linkage theory and MWC-type models.
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This paper presents a detailed systems model of Parkinson's disease (PD), developed utilizing a pragmatic application of biochemical systems theory (BST) intended to assist experimentalists in the study of system behavior. This approach utilizes relative values as a reasonable initial estimate for BST and provides a theoretical means of applying numerical solutions to qualitative and semi-quantitative understandings of cellular pathways and mechanisms. The approach allows for the simulation of human disease through its ability to organize and integrate existing information about metabolic pathways without having a full quantitative description of those pathways, so that hypotheses about individual processes may be tested in a systems environment. Incorporating this method, the PD model describes alpha-synuclein aggregation as mediated by dopamine metabolism, the ubiquitin-proteasome system, and lysosomal degradation, allowing for the examination of dynamic pathway interactions and the evaluation of possible toxic mechanisms in the aggregation process. Four system perturbations: elevated alpha-synuclein aggregation, impaired dopamine packaging, increased neurotoxins, and alpha-synuclein overexpression, were analyzed for correlation to qualitative PD system hypotheses present in the literature, with the model demonstrating a high level of agreement with these hypotheses. Additionally, various PD treatment methods, including levadopa and monoamine oxidase inhibition (MAOI) therapy, were applied to the disease models to examine their effects on the system. Future additions and refinements to the model may further the understanding of the emergent behaviors of the disease, helping in the identification of system sensitivities and possible therapeutic targets.
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Kolodkin A, Sahin N, Phillips A, Hood SR, Bruggeman FJ, Westerhoff HV, Plant N.
Nat Commun 2013; 4: 1792
Abstract:
It is an accepted paradigm that extended stress predisposes an individual to pathophysiology. However, the biological adaptations to minimize this risk are poorly understood. Using a computational model based upon realistic kinetic parameters we are able to reproduce the interaction of the stress hormone cortisol with its two nuclear receptors, the high-affinity glucocorticoid receptor and the low-affinity pregnane X-receptor. We demonstrate that regulatory signals between these two nuclear receptors are necessary to optimize the body's response to stress episodes, attenuating both the magnitude and duration of the biological response. In addition, we predict that the activation of pregnane X-receptor by multiple, low-affinity endobiotic ligands is necessary for the significant pregnane X-receptor-mediated transcriptional response observed following stress episodes. This integration allows responses mediated through both the high and low-affinity nuclear receptors, which we predict is an important strategy to minimize the risk of disease from chronic stress.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
Zhou2015 - Circadian clock with immuneregulator NPR1
Arabidopsis clock model modified fromP2012 (Pokhilko et al., 2013 - BIOMD0000000445)model to include the master immune regulator NPR1 coupling to LHY,TOC1 and PRR7. Triggers: The Global Quantities contain triggers that allowone to change coupling settings, Salicyclic acid (SA) treatment andnpr1 mutants. LHY_on: true->NPR1 couples to LHY PRR7_on: true->NPR1 couples to PRR7 WT: true->WT plants, false->npr1 mutant plants SA: true->SA treated plants, false->no treatment This model has L=1, i.e. operates only under constant lightconditions and is not aiming to make preditions under diurnalconditions. Due to period overshoot only time points after 28h arerelevant.
Zhou M, Wang W, Karapetyan S, Mwimba M, Marqu\u00e9s J, Buchler NE, Dong X.
Nature 2015 Jun;
Abstract:
Recent studies have shown that in addition to the transcriptional circadian clock, many organisms, including Arabidopsis, have a circadian redox rhythm driven by the organism's metabolic activities. It has been hypothesized that the redox rhythm is linked to the circadian clock, but the mechanism and the biological significance of this link have only begun to be investigated. Here we report that the master immune regulator NPR1 (non-expressor of pathogenesis-related gene 1) of Arabidopsis is a sensor of the plant's redox state and regulates transcription of core circadian clock genes even in the absence of pathogen challenge. Surprisingly, acute perturbation in the redox status triggered by the immune signal salicylic acid does not compromise the circadian clock but rather leads to its reinforcement. Mathematical modelling and subsequent experiments show that NPR1 reinforces the circadian clock without changing the period by regulating both the morning and the evening clock genes. This balanced network architecture helps plants gate their immune responses towards the morning and minimize costs on growth at night. Our study demonstrates how a sensitive redox rhythm interacts with a robust circadian clock to ensure proper responsiveness to environmental stimuli without compromising fitness of the organism.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
Invergo BM, Dell'Orco D, Montanucci L, Koch KW, Bertranpetit J.
Mol Biosyst 2014 Jun; 10(6): 1481-1489
Abstract:
Vertebrate visual phototransduction is perhaps the most well-studied G-protein signaling pathway. A wealth of available biochemical and electrophysiological data has resulted in a rich history of mathematical modeling of the system. However, while the most comprehensive models have relied upon amphibian biochemical and electrophysiological data, modern research typically employs mammalian species, particularly mice, which exhibit significantly faster signaling dynamics. In this work, we present an adaptation of a previously published, comprehensive model of amphibian phototransduction that can produce quantitatively accurate simulations of the murine photoresponse. We demonstrate the ability of the model to predict responses to a wide range of stimuli and under a variety of mutant conditions. Finally, we employ the model to highlight a likely unknown mechanism related to the interaction between rhodopsin and rhodopsin kinase.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
HEPNet is an electronic representation of metabolic reactions occurring within human cellular organization focusing on inflow and outflow of the energy currency ATP, GTP and other energy associated moieties. The backbone of HEPNet consists of primary bio-molecules such as carbohydrates, proteins and fats which ultimately constitute the chief source for the synthesis and obliteration of energy currencies in a cell. A series of biochemical pathways and reactions constituting the catabolism and anabolism of various metabolites are portrayed through cellular compartmentalization. The depicted pathways function synchronously toward an overarching goal of producing ATP and other energy associated moieties to bring into play a variety of cellular functions. HEPNet is manually curated with raw data from experiments and is also connected to KEGG and Reactome databases. This model has been validated by simulating it with physiological states like fasting, starvation, exercise and disease conditions like glycaemia, uremia and dihydrolipoamide dehydrogenase deficiency (DLDD). The results clearly indicate that ATP is the master regulator under different metabolic conditions and physiological states. The results also highlight that energy currencies play a minor role. However, the moiety creatine phosphate has a unique character, since it is a ready-made source of phosphoryl groups for the rapid synthesis of ATP from ADP. HEPNet provides a framework for further expanding the network diverse age groups of both the sexes, followed by the understanding of energetics in more complex metabolic pathways that are related to human disorders.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
Sonntag2012 - mTOR model - IRS dependent regulation of AMPK by insulin
TSC1-TSC2 complex has two states: 1)active (TSC1_TSC2_pS1387), regulated by AMPK_pT172; 2) inactive(TSC1_TSC2_pT1462) regulated by Akt_pT308. Particularly, mTORC1 isinhibited by TSC1_TSC2 in active state. AMPK is activated at T172by the species IRS1_p activated by the insulin receptor uponinsulin stimulation. Consequently, AMPK_pT172 is inhibited bymTORC1_pS2448 indirectly by the p70-S6K-negative feedback loop.
Sonntag AG, Dalle Pezze P, Shanley DP, Thedieck K.
FEBS J. 2012 Sep; 279(18): 3314-3328
Abstract:
Mammalian target of rapamycin (mTOR) kinase responds to growth factors, nutrients and cellular energy status and is a central controller of cellular growth. mTOR exists in two multiprotein complexes that are embedded into a complex signalling network. Adenosine monophosphate-dependent kinase (AMPK) is activated by energy deprivation and shuts off adenosine 5'-triphosphate (ATP)-consuming anabolic processes, in part via the inactivation of mTORC1. Surprisingly, we observed that AMPK not only responds to energy deprivation but can also be activated by insulin, and is further induced in mTORC1-deficient cells. We have recently modelled the mTOR network, covering both mTOR complexes and their insulin and nutrient inputs. In the present study we extended the network by an AMPK module to generate the to date most comprehensive data-driven dynamic AMPK-mTOR network model. In order to define the intersection via which AMPK is activated by the insulin network, we compared simulations for six different hypothetical model structures to our observed AMPK dynamics. Hypotheses ranking suggested that the most probable intersection between insulin and AMPK was the insulin receptor substrate (IRS) and that the effects of canonical IRS downstream cues on AMPK would be mediated via an mTORC1-driven negative-feedback loop. We tested these predictions experimentally in multiple set-ups, where we inhibited or induced players along the insulin-mTORC1 signalling axis and observed AMPK induction or inhibition. We confirmed the identified model and therefore report a novel connection within the insulin-mTOR-AMPK network: we conclude that AMPK is positively regulated by IRS and can be inhibited via the negative-feedback loop.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
Dalle Pezze P, Sonntag AG, Thien A, Prentzell MT, G\u00f6del M, Fischer S, Neumann-Haefelin E, Huber TB, Baumeister R, Shanley DP, Thedieck K.
Sci Signal 2012 Mar; 5(217): ra25
Abstract:
The kinase mammalian target of rapamycin (mTOR) exists in two multiprotein complexes (mTORC1 and mTORC2) and is a central regulator of growth and metabolism. Insulin activation of mTORC1, mediated by phosphoinositide 3-kinase (PI3K), Akt, and the inhibitory tuberous sclerosis complex 1/2 (TSC1-TSC2), initiates a negative feedback loop that ultimately inhibits PI3K. We present a data-driven dynamic insulin-mTOR network model that integrates the entire core network and used this model to investigate the less well understood mechanisms by which insulin regulates mTORC2. By analyzing the effects of perturbations targeting several levels within the network in silico and experimentally, we found that, in contrast to current hypotheses, the TSC1-TSC2 complex was not a direct or indirect (acting through the negative feedback loop) regulator of mTORC2. Although mTORC2 activation required active PI3K, this was not affected by the negative feedback loop. Therefore, we propose an mTORC2 activation pathway through a PI3K variant that is insensitive to the negative feedback loop that regulates mTORC1. This putative pathway predicts that mTORC2 would be refractory to Akt, which inhibits TSC1-TSC2, and, indeed, we found that mTORC2 was insensitive to constitutive Akt activation in several cell types. Our results suggest that a previously unknown network structure connects mTORC2 to its upstream cues and clarifies which molecular connectors contribute to mTORC2 activation.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
Dalle Pezze P, Nelson G, Otten EG, Korolchuk VI, Kirkwood TB, von Zglinicki T, Shanley DP.
PLoS Comput. Biol. 2014 Aug; 10(8): e1003728
Abstract:
Cellular senescence, a state of irreversible cell cycle arrest, is thought to help protect an organism from cancer, yet also contributes to ageing. The changes which occur in senescence are controlled by networks of multiple signalling and feedback pathways at the cellular level, and the interplay between these is difficult to predict and understand. To unravel the intrinsic challenges of understanding such a highly networked system, we have taken a systems biology approach to cellular senescence. We report a detailed analysis of senescence signalling via DNA damage, insulin-TOR, FoxO3a transcription factors, oxidative stress response, mitochondrial regulation and mitophagy. We show in silico and in vitro that inhibition of reactive oxygen species can prevent loss of mitochondrial membrane potential, whilst inhibition of mTOR shows a partial rescue of mitochondrial mass changes during establishment of senescence. Dual inhibition of ROS and mTOR in vitro confirmed computational model predictions that it was possible to further reduce senescence-induced mitochondrial dysfunction and DNA double-strand breaks. However, these interventions were unable to abrogate the senescence-induced mitochondrial dysfunction completely, and we identified decreased mitochondrial fission as the potential driving force for increased mitochondrial mass via prevention of mitophagy. Dynamic sensitivity analysis of the model showed the network stabilised at a new late state of cellular senescence. This was characterised by poor network sensitivity, high signalling noise, low cellular energy, high inflammation and permanent cell cycle arrest suggesting an unsatisfactory outcome for treatments aiming to delay or reverse cellular senescence at late time points. Combinatorial targeted interventions are therefore possible for intervening in the cellular pathway to senescence, but in the cases identified here, are only capable of delaying senescence onset.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
Leber A, Viladomiu M, Hontecillas R, Abedi V, Philipson C, Hoops S, Howard B, Bassaganya-Riera J.
PLoS ONE 2015; 10(7): e0134849
Abstract:
Clostridium difficile infections are associated with the use of broad-spectrum antibiotics and result in an exuberant inflammatory response, leading to nosocomial diarrhea, colitis and even death. To better understand the dynamics of mucosal immunity during C. difficile infection from initiation through expansion to resolution, we built a computational model of the mucosal immune response to the bacterium. The model was calibrated using data from a mouse model of C. difficile infection. The model demonstrates a crucial role of T helper 17 (Th17) effector responses in the colonic lamina propria and luminal commensal bacteria populations in the clearance of C. difficile and colonic pathology, whereas regulatory T (Treg) cells responses are associated with the recovery phase. In addition, the production of anti-microbial peptides by inflamed epithelial cells and activated neutrophils in response to C. difficile infection inhibit the re-growth of beneficial commensal bacterial species. Computational simulations suggest that the removal of neutrophil and epithelial cell derived anti-microbial inhibitions, separately and together, on commensal bacterial regrowth promote recovery and minimize colonic inflammatory pathology. Simulation results predict a decrease in colonic inflammatory markers, such as neutrophilic influx and Th17 cells in the colonic lamina propria, and length of infection with accelerated commensal bacteria re-growth through altered anti-microbial inhibition. Computational modeling provides novel insights on the therapeutic value of repopulating the colonic microbiome and inducing regulatory mucosal immune responses during C. difficile infection. Thus, modeling mucosal immunity-gut microbiota interactions has the potential to guide the development of targeted fecal transplantation therapies in the context of precision medicine interventions.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
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- "name": "Mandlik2015 - Tristable genetic circuit of Leishmania",
- "repository_type": "biomodels",
- "summary": "Vineetha Mandlik, Mayuri Gurav & Shailza Singh. Regulatory dynamics of network architecture and function in tristable genetic circuit of Leishmania: a mathematical biology approach. Journal of Biomolecular Structure and Dynamics 33, 12 (2015).The emerging field of synthetic biology has led to the design of tailor-made synthetic circuits for several therapeutic applications. Biological networks can be reprogramed by designing synthetic circuits that modulate the expression of target proteins. IPCS (inositol phosphorylceramide synthase) has been an attractive target in the sphingolipid metabolism of the parasite Leishmania. In this study, we have constructed a tristable circuit for the IPCS protein. The circuit has been validated and its long-term behavior has been assessed. The robustness and evolvability of the circuit has been estimated using evolutionary algorithms. The tristable synthetic circuit has been specifically designed to improve the rate of production of phosphatidylcholine: ceramide cholinephosphotransferase 4 (SLS4 protein). Site-specific delivery of the circuit into the parasite-infected macrophages could serve as a possible therapeutic intervention of the infectious disease 'Leishmaniasis'.",
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- "id": 3988,
- "tag": "Sphingolipid metabolic process"
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- "name": "Rateitschak2012 - Interferon-gamma (IFN\u03b3) induced STAT1 signalling (PC_IFNg100)",
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Rateitschak K, Winter F, Lange F, Jaster R, Wolkenhauer O.
PLoS Comput. Biol. 2012; 8(12): e1002815
Abstract:
The present work exemplifies how parameter identifiability analysis can be used to gain insights into differences in experimental systems and how uncertainty in parameter estimates can be handled. The case study, presented here, investigates interferon-gamma (IFN\u03b3) induced STAT1 signalling in two cell types that play a key role in pancreatic cancer development: pancreatic stellate and cancer cells. IFN\u03b3 inhibits the growth for both types of cells and may be prototypic of agents that simultaneously hit cancer and stroma cells. We combined time-course experiments with mathematical modelling to focus on the common situation in which variations between profiles of experimental time series, from different cell types, are observed. To understand how biochemical reactions are causing the observed variations, we performed a parameter identifiability analysis. We successfully identified reactions that differ in pancreatic stellate cells and cancer cells, by comparing confidence intervals of parameter value estimates and the variability of model trajectories. Our analysis shows that useful information can also be obtained from nonidentifiable parameters. For the prediction of potential therapeutic targets we studied the consequences of uncertainty in the values of identifiable and nonidentifiable parameters. Interestingly, the sensitivity of model variables is robust against parameter variations and against differences between IFN\u03b3 induced STAT1 signalling in pancreatic stellate and cancer cells. This provides the basis for a prediction of therapeutic targets that are valid for both cell types.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
Phys Rev E Stat Nonlin Soft Matter Phys 2015 Dec; 92(6-1): 062712
Abstract:
Genetic oscillators, such as circadian clocks, are constantly perturbed by molecular noise arising from the small number of molecules involved in gene regulation. One of the strongest sources of stochasticity is the binary noise that arises from the binding of a regulatory protein to a promoter in the chromosomal DNA. In this study, we focus on two minimal oscillators based on activator titration and repressor titration to understand the key parameters that are important for oscillations and for overcoming binary noise. We show that the rate of unbinding from the DNA, despite traditionally being considered a fast parameter, needs to be slow to broaden the space of oscillatory solutions. The addition of multiple, independent DNA binding sites further expands the oscillatory parameter space for the repressor-titration oscillator and lengthens the period of both oscillators. This effect is a combination of increased effective delay of the unbinding kinetics due to multiple binding sites and increased promoter ultrasensitivity that is specific for repression. We then use stochastic simulation to show that multiple binding sites increase the coherence of oscillations by mitigating the binary noise. Slow values of DNA unbinding rate are also effective in alleviating molecular noise due to the increased distance from the bifurcation point. Our work demonstrates how the number of DNA binding sites and slow unbinding kinetics, which are often omitted in biophysical models of gene circuits, can have a significant impact on the temporal and stochastic dynamics of genetic oscillators.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
Phys Rev E Stat Nonlin Soft Matter Phys 2015 Dec; 92(6-1): 062712
Abstract:
Genetic oscillators, such as circadian clocks, are constantly perturbed by molecular noise arising from the small number of molecules involved in gene regulation. One of the strongest sources of stochasticity is the binary noise that arises from the binding of a regulatory protein to a promoter in the chromosomal DNA. In this study, we focus on two minimal oscillators based on activator titration and repressor titration to understand the key parameters that are important for oscillations and for overcoming binary noise. We show that the rate of unbinding from the DNA, despite traditionally being considered a fast parameter, needs to be slow to broaden the space of oscillatory solutions. The addition of multiple, independent DNA binding sites further expands the oscillatory parameter space for the repressor-titration oscillator and lengthens the period of both oscillators. This effect is a combination of increased effective delay of the unbinding kinetics due to multiple binding sites and increased promoter ultrasensitivity that is specific for repression. We then use stochastic simulation to show that multiple binding sites increase the coherence of oscillations by mitigating the binary noise. Slow values of DNA unbinding rate are also effective in alleviating molecular noise due to the increased distance from the bifurcation point. Our work demonstrates how the number of DNA binding sites and slow unbinding kinetics, which are often omitted in biophysical models of gene circuits, can have a significant impact on the temporal and stochastic dynamics of genetic oscillators.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
Benson N, Matsuura T, Smirnov S, Demin O, Jones HM, Dua P, van der Graaf PH.
Interface Focus 2013 Apr; 3(2): 20120071
Abstract:
The nerve growth factor (NGF) pathway is of great interest as a potential source of drug targets, for example in the management of certain types of pain. However, selecting targets from this pathway either by intuition or by non-contextual measures is likely to be challenging. An alternative approach is to construct a mathematical model of the system and via sensitivity analysis rank order the targets in the known pathway, with respect to an endpoint such as the diphosphorylated extracellular signal-regulated kinase concentration in the nucleus. Using the published literature, a model was created and, via sensitivity analysis, it was concluded that, after NGF itself, tropomyosin receptor kinase A (TrkA) was one of the most sensitive druggable targets. This initial model was subsequently used to develop a further model incorporating physiological and pharmacological parameters. This allowed the exploration of the characteristics required for a successful hypothetical TrkA inhibitor. Using these systems models, we were able to identify candidates for the optimal drug targets in the known pathway. These conclusions were consistent with clinical and human genetic data. We also found that incorporating appropriate physiological context was essential to drawing accurate conclusions about important parameters such as the drug dose required to give pathway inhibition. Furthermore, the importance of the concentration of key reactants such as TrkA kinase means that appropriate contextual data are required before clear conclusions can be drawn. Such models could be of great utility in selecting optimal targets and in the clinical evaluation of novel drugs.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
Valero E, Maci\u00e0 H, De la Fuente IM, Hern\u00e1ndez JA, Gonz\u00e1lez-S\u00e1nchez MI, Garc\u00eda-Carmona F.
BMC Syst Biol 2016; 10(1): 11
Abstract:
Light/dark cycles are probably the most important environmental signals that regulate plant development. Light is essential for photosynthesis, but an excess, in combination with the unavoidable presence of atmospheric oxygen inside the chloroplast, leads to excessive reactive oxygen species production. Among the defense mechanisms that activate plants to cope with environmental stress situations, it is worth noting the ascorbate-glutathione cycle, a complex metabolic pathway in which a variety of photochemical, chemical and enzymatic steps are involved.We herein studied the dynamic behavior of this pathway under light/dark conditions and for several consecutive days. For this purpose, a mathematical model was developed including a variable electron source with a rate law proportional to the intensity of solar irradiance during the photoperiod, and which is continuously turned off at night and on again the next day. The model is defined by a nonlinear system of ordinary differential equations with an on/off time-dependent input, including a parameter to simulate the fact that the photoperiod length is not constant throughout the year, and which takes into account the particular experimental kinetics of each enzyme involved in the pathway. Unlike previous models, which have only provided steady-state solutions, the present model is able to simulate diurnal fluctuations in the metabolite concentrations, fluxes and enzymatic rates involved in the network.The obtained results are broadly consistent with experimental observations and highlight the key role played by ascorbate recycling for plants to adapt to their surrounding environment. This approach provides a new strategy to in vivo studies to analyze plant defense mechanisms against oxidative stress induced by external changes, which can also be extrapolated to other complex metabolic pathways to constitute a useful tool to the scientific community in general.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
Hermansen RA , Mannakee BK , Knecht W , Liberles DA , Gutenkunst RN
BMC Evolutionary Biology. 2015, 15:232
Abstract:
Selection on proteins is typically measured with the assumption that each protein acts independently. However, selection more likely acts at higher levels of biological organization, requiring an integrative view of protein function. Here, we built a kinetic model for de novo pyrimidine biosynthesis in the yeast Saccharomyces cerevisiae to relate pathway function to selective pressures on individual protein-encoding genes.Gene families across yeast were constructed for each member of the pathway and the ratio of nonsynonymous to synonymous nucleotide substitution rates (dN/dS) was estimated for each enzyme from S. cerevisiae and closely related species. We found a positive relationship between the influence that each enzyme has on pathway function and its selective constraint.We expect this trend to be locally present for enzymes that have pathway control, but over longer evolutionary timescales we expect that mutation-selection balance may change the enzymes that have pathway control.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
Boehm2014 - isoform-specific dimerization of pSTAT5A and pSTAT5B
To study STAT5 activation, the authors build a dynamic model of pSTAT5 isoform dimerization. Combinatorial binding of pSTAT5A and pSTAT5B is analysed using model hypotheses and concurrent experiments. Model parameters are derived from the experiments on Ba/F3 cells. Results show that pSTAT5 heterodimerization hypothesis for STAT5 activation favours experimental results.
Boehm ME, Adlung L, Schilling M, Roth S, Klingm\u00fcller U, Lehmann WD
J Proteome Res. 2014 Dec 5;13(12):5685-94
Abstract:
STAT5A and STAT5B are important transcription factors that dimerize and transduce activation signals of cytokine receptors directly to the nucleus. A typical cytokine that mediates STAT5 activation is erythropoietin (Epo). Differential functions of STAT5A and STAT5B have been reported. However, the extent to which phosphorylated STAT5A and STAT5B (pSTAT5A, pSTAT5B) form homo- or heterodimers is not understood, nor is how this might influence the signal transmission to the nucleus. To study this, we designed a concept to investigate the isoform-specific dimerization behavior of pSTAT5A and pSTAT5B that comprises isoform-specific immunoprecipitation (IP), measurement of the degree of phosphorylation, and isoform ratio determination between STAT5A and STAT5B. For the main analytical method, we employed quantitative label-free and -based mass spectrometry. For the cellular model system, we used Epo receptor (EpoR)-expressing BaF3 cells (BaF3-EpoR) stimulated with Epo. Three hypotheses of dimer formation between pSTAT5A and pSTAT5B were used to explain the analytical results by a static mathematical model: formation of (i) homodimers only, (ii) heterodimers only, and (iii) random formation of homo- and heterodimers. The best agreement between experimental data and model simulations was found for the last case. Dynamics of cytoplasmic STAT5 dimerization could be explained by distinct nuclear import rates and individual nuclear retention for homo- and heterodimers of phosphorylated STAT5.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
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- "name": "Martinez-Sanchez2015 - T CD4+ lymphocyte transcriptional regulatory network",
- "repository_type": "biomodels",
- "summary": "Mariana Esther Martinez-Sanchez, Luis Mendoza, Carlos Villarreal & Elena R. Alvarez-Buylla. A Minimal Regulatory Network of Extrinsic and Intrinsic Factors Recovers Observed Patterns of CD4+ T Cell Differentiation and Plasticity. PLOS Computational Biology 11, 6 (2015).CD4+ T cells orchestrate the adaptive immune response in vertebrates. While both experimental and modeling work has been conducted to understand the molecular genetic mechanisms involved in CD4+ T cell responses and fate attainment, the dynamic role of intrinsic (produced by CD4+ T lymphocytes) versus extrinsic (produced by other cells) components remains unclear, and the mechanistic and dynamic understanding of the plastic responses of these cells remains incomplete. In this work, we studied a regulatory network for the core transcription factors involved in CD4+ T cell-fate attainment. We first show that this core is not sufficient to recover common CD4+ T phenotypes. We thus postulate a minimal Boolean regulatory network model derived from a larger and more comprehensive network that is based on experimental data. The minimal network integrates transcriptional regulation, signaling pathways and the micro-environment. This network model recovers reported configurations of most of the characterized cell types (Th0, Th1, Th2, Th17, Tfh, Th9, iTreg, and Foxp3-independent T regulatory cells). This transcriptional-signaling regulatory network is robust and recovers mutant configurations that have been reported experimentally. Additionally, this model recovers many of the plasticity patterns documented for different T CD4+ cell types, as summarized in a cell-fate map. We tested the effects of various micro-environments and transient perturbations on such transitions among CD4+ T cell types. Interestingly, most cell-fate transitions were induced by transient activations, with the opposite behavior associated with transient inhibitions. Finally, we used a novel methodology was used to establish that T-bet, TGF-\u03b2 and suppressors of cytokine signaling proteins are keys to recovering observed CD4+ T cell plastic responses. In conclusion, the observed CD4+ T cell-types and transition patterns emerge from the feedback between the intrinsic or intracellular regulatory core and the micro-environment. We discuss the broader use of this approach for other plastic systems and possible therapeutic interventions.",
- "tags": [
- {
- "id": 2936,
- "tag": "BioModels"
- },
- {
- "id": 4003,
- "tag": "BioModels:BIOMD0000000592"
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- "id": 4004,
- "tag": "Cell differentiation"
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- "id": 704,
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- },
- {
- "id": 3487,
- "tag": "Vertebrata"
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- "timestamp_created": "2025-01-30 13:54:02.835504+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000000592",
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- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
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- "name": "Martinez-Sanchez2015 - T CD4+ lymphocyte transcriptional-signaling regulatory network",
- "repository_type": "biomodels",
- "summary": "
Martinez-Sanchez2015 - T CD4+ lymphocytetranscriptional-signaling regulatory network
CD4+ T cells orchestrate the adaptive immune response in vertebrates. While both experimental and modeling work has been conducted to understand the molecular genetic mechanisms involved in CD4+ T cell responses and fate attainment, the dynamic role of intrinsic (produced by CD4+ T lymphocytes) versus extrinsic (produced by other cells) components remains unclear, and the mechanistic and dynamic understanding of the plastic responses of these cells remains incomplete. In this work, we studied a regulatory network for the core transcription factors involved in CD4+ T cell-fate attainment. We first show that this core is not sufficient to recover common CD4+ T phenotypes. We thus postulate a minimal Boolean regulatory network model derived from a larger and more comprehensive network that is based on experimental data. The minimal network integrates transcriptional regulation, signaling pathways and the micro-environment. This network model recovers reported configurations of most of the characterized cell types (Th0, Th1, Th2, Th17, Tfh, Th9, iTreg, and Foxp3-independent T regulatory cells). This transcriptional-signaling regulatory network is robust and recovers mutant configurations that have been reported experimentally. Additionally, this model recovers many of the plasticity patterns documented for different T CD4+ cell types, as summarized in a cell-fate map. We tested the effects of various micro-environments and transient perturbations on such transitions among CD4+ T cell types. Interestingly, most cell-fate transitions were induced by transient activations, with the opposite behavior associated with transient inhibitions. Finally, we used a novel methodology was used to establish that T-bet, TGF-? and suppressors of cytokine signaling proteins are keys to recovering observed CD4+ T cell plastic responses. In conclusion, the observed CD4+ T cell-types and transition patterns emerge from the feedback between the intrinsic or intracellular regulatory core and the micro-environment. We discuss the broader use of this approach for other plastic systems and possible therapeutic interventions.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
",
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- "id": 4005,
- "tag": "BioModels:BIOMD0000000593"
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- "id": 704,
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- "id": 3487,
- "tag": "Vertebrata"
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- ],
- "timestamp_created": "2025-01-30 13:54:03.353894+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000000593",
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- "id": 2884,
- "name": "Capuani2015 - Binding of Cbl and Gbr2 to EGFR (Multisite Phosphorylation Model - MPM)",
- "repository_type": "biomodels",
- "summary": "Fabrizio Capuani, Alexia Conte, Elisabetta Argenzio, Luca Marchetti, Corrado Priami, Simona Polo, Pier Paolo Di Fiore, Sara Sigismund & Andrea Ciliberto. Quantitative analysis reveals how EGFR activation and downregulation are coupled in normal but not in cancer cells. Nature Communications 6 (2015).Ubiquitination of the epidermal growth factor receptor (EGFR) that occurs when Cbl and Grb2 bind to three phosphotyrosine residues (pY1045, pY1068 and pY1086) on the receptor displays a sharp threshold effect as a function of EGF concentration. Here we use a simple modelling approach together with experiments to show that the establishment of the threshold requires both the multiplicity of binding sites and cooperative binding of Cbl and Grb2 to the EGFR. While the threshold is remarkably robust, a more sophisticated model predicted that it could be modulated as a function of EGFR levels on the cell surface. We confirmed experimentally that the system has evolved to perform optimally at physiological levels of EGFR. As a consequence, this system displays an intrinsic weakness that causes--at the supraphysiological levels of receptor and/or ligand associated with cancer--uncoupling of the mechanisms leading to signalling through phosphorylation and attenuation through ubiquitination.",
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- "tag": "BioModels"
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- {
- "id": 4006,
- "tag": "BioModels:BIOMD0000000594"
- },
- {
- "id": 3014,
- "tag": "Epidermal growth factor receptor signaling pathway"
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- "id": 3002,
- "tag": "Homo sapiens"
- },
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- "id": 704,
- "tag": "SBML"
- },
- {
- "id": 4603,
- "tag": "Cancer"
- }
- ],
- "timestamp_created": "2025-01-30 13:54:03.962206+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000000594",
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- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "id": 2885,
- "name": "Capuani2015 - Binding of Cbl and Grb2 to EGFR (Early Activation Model - EAM)",
- "repository_type": "biomodels",
- "summary": "Fabrizio Capuani, Alexia Conte, Elisabetta Argenzio, Luca Marchetti, Corrado Priami, Simona Polo, Pier Paolo Di Fiore, Sara Sigismund & Andrea Ciliberto. Quantitative analysis reveals how EGFR activation and downregulation are coupled in normal but not in cancer cells. Nature Communications 6 (2015).Ubiquitination of the epidermal growth factor receptor (EGFR) that occurs when Cbl and Grb2 bind to three phosphotyrosine residues (pY1045, pY1068 and pY1086) on the receptor displays a sharp threshold effect as a function of EGF concentration. Here we use a simple modelling approach together with experiments to show that the establishment of the threshold requires both the multiplicity of binding sites and cooperative binding of Cbl and Grb2 to the EGFR. While the threshold is remarkably robust, a more sophisticated model predicted that it could be modulated as a function of EGFR levels on the cell surface. We confirmed experimentally that the system has evolved to perform optimally at physiological levels of EGFR. As a consequence, this system displays an intrinsic weakness that causes--at the supraphysiological levels of receptor and/or ligand associated with cancer--uncoupling of the mechanisms leading to signalling through phosphorylation and attenuation through ubiquitination.",
- "tags": [
- {
- "id": 2936,
- "tag": "BioModels"
- },
- {
- "id": 4007,
- "tag": "BioModels:BIOMD0000000595"
- },
- {
- "id": 3014,
- "tag": "Epidermal growth factor receptor signaling pathway"
- },
- {
- "id": 3002,
- "tag": "Homo sapiens"
- },
- {
- "id": 704,
- "tag": "SBML"
- },
- {
- "id": 4603,
- "tag": "Cancer"
- }
- ],
- "timestamp_created": "2025-01-30 13:54:04.462553+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000000595",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "default_context": "12",
- "id": 2886,
- "name": "Philipson2015 - Innate immune response modulated by NLRX1",
- "repository_type": "biomodels",
- "summary": "Casandra W. Philipson, Josep Bassaganya-Riera, Monica Viladomiu, Barbara Kronsteiner, Vida Abedi, Stefan Hoops, Pawel Michalak, Lin Kang, Stephen E. Girardin & Raquel Hontecillas. Modeling the Regulatory Mechanisms by Which NLRX1 Modulates Innate Immune Responses to Helicobacter pylori Infection. PLOS ONE 10, 9 (2015).Helicobacter pylori colonizes half of the world's population as the dominant member of the gastric microbiota resulting in a lifelong chronic infection. Host responses toward the bacterium can result in asymptomatic, pathogenic or even favorable health outcomes; however, mechanisms underlying the dual role of H. pylori as a commensal versus pathogenic organism are not well characterized. Recent evidence suggests mononuclear phagocytes are largely involved in shaping dominant immunity during infection mediating the balance between host tolerance and succumbing to overt disease. We combined computational modeling, bioinformatics and experimental validation in order to investigate interactions between macrophages and intracellular H. pylori. Global transcriptomic analysis on bone marrow-derived macrophages (BMDM) in a gentamycin protection assay at six time points unveiled the presence of three sequential host response waves: an early transient regulatory gene module followed by sustained and late effector responses. Kinetic behaviors of pattern recognition receptors (PRRs) are linked to differential expression of spatiotemporal response waves and function to induce effector immunity through extracellular and intracellular detection of H. pylori. We report that bacterial interaction with the host intracellular environment caused significant suppression of regulatory NLRC3 and NLRX1 in a pattern inverse to early regulatory responses. To further delineate complex immune responses and pathway crosstalk between effector and regulatory PRRs, we built a computational model calibrated using time-series RNAseq data. Our validated computational hypotheses are that: 1) NLRX1 expression regulates bacterial burden in macrophages; and 2) early host response cytokines down-regulate NLRX1 expression through a negative feedback circuit. This paper applies modeling approaches to characterize the regulatory role of NLRX1 in mechanisms of host tolerance employed by macrophages to respond to and/or to co-exist with intracellular H. pylori.",
- "tags": [
- {
- "id": 2936,
- "tag": "BioModels"
- },
- {
- "id": 4008,
- "tag": "BioModels:BIOMD0000000596"
- },
- {
- "id": 704,
- "tag": "SBML"
- }
- ],
- "timestamp_created": "2025-01-30 13:54:04.995982+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000000596",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "2887": {
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- "content_types": "modeling",
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- "id": 2887,
- "name": "Flis2015 - Plant clock gene circuit (P2011.1.2 PLM_71 ver 1)",
- "repository_type": "biomodels",
- "summary": "
Flis2015 - Plant clock gene circuit(P2011.1.2 PLM_71 ver 1)
Flis A, Fern\u00e1ndez AP, Zielinski T, Mengin V, Sulpice R, Stratford K, Hume A, Pokhilko A, Southern MM, Seaton DD, McWatters HG, Stitt M, Halliday KJ, Millar AJ.
Open Biol 2015 Oct; 5(10):
Abstract:
Our understanding of the complex, transcriptional feedback loops in the circadian clock mechanism has depended upon quantitative, timeseries data from disparate sources. We measure clock gene RNA profiles in Arabidopsis thaliana seedlings, grown with or without exogenous sucrose, or in soil-grown plants and in wild-type and mutant backgrounds. The RNA profiles were strikingly robust across the experimental conditions, so current mathematical models are likely to be broadly applicable in leaf tissue. In addition to providing reference data, unexpected behaviours included co-expression of PRR9 and ELF4, and regulation of PRR5 by GI. Absolute RNA quantification revealed low levels of PRR9 transcripts (peak approx. 50 copies cell(-1)) compared with other clock genes, and threefold higher levels of LHY RNA (more than 1500 copies cell(-1)) than of its close relative CCA1. The data are disseminated from BioDare, an online repository for focused timeseries data, which is expected to benefit mechanistic modelling. One data subset successfully constrained clock gene expression in a complex model, using publicly available software on parallel computers, without expert tuning or programming. We outline the empirical and mathematical justification for data aggregation in understanding highly interconnected, dynamic networks such as the clock, and the observed design constraints on the resources required to make this approach widely accessible.
cL_m_degr, param m1, modified to ensure light rate > dark rate.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
cL_m_degr, param m1, modified to ensure light rate > dark rate. Parameter set from PLM_67v2_LDLLLDs_newFFT_1, with modification to m1 (= old_m1 - m2).
",
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- "id": 3104,
- "tag": "Arabidopsis thaliana"
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- "id": 4010,
- "tag": "BioModels:BIOMD0000000598"
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- {
- "id": 3006,
- "tag": "Regulation of circadian rhythm"
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- "id": 704,
- "tag": "SBML"
- }
- ],
- "timestamp_created": "2025-01-30 13:54:06.047744+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000000598",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "default_context": "4",
- "id": 2889,
- "name": "Coggins2014 - CXCL12 dependent recruitment of beta arrestin",
- "repository_type": "biomodels",
- "summary": "Nathaniel L. Coggins, Danielle Trakimas, S. Laura Chang, Anna Ehrlich, Paramita Ray, Kathryn E. Luker, Jennifer J. Linderman & Gary D. Luker. CXCR7 controls competition for recruitment of \u03b2-arrestin 2 in cells expressing both CXCR4 and CXCR7. PLoS ONE 9, 6 (2014).Chemokine CXCL12 promotes growth and metastasis of more than 20 different human cancers, as well as pathogenesis of other common diseases. CXCL12 binds two different receptors, CXCR4 and CXCR7, both of which recruit and signal through the cytosolic adapter protein \u03b2-arrestin 2. Differences in CXCL12-dependent recruitment of \u03b2-arrestin 2 in cells expressing one or both receptors remain poorly defined. To quantitatively investigate parameters controlling association of \u03b2-arrestin 2 with CXCR4 or CXCR7 in cells co-expressing both receptors, we used a systems biology approach combining real-time, multi-spectral luciferase complementation imaging with computational modeling. Cells expressing only CXCR4 maintain low basal association with \u03b2-arrestin 2, and CXCL12 induces a rapid, transient increase in this interaction. In contrast, cells expressing only CXCR7 have higher basal association with \u03b2-arrestin 2 and exhibit more gradual, prolonged recruitment of \u03b2-arrestin 2 in response to CXCL12. We developed and fit a data-driven computational model for association of either CXCR4 or CXCR7 with \u03b2-arrestin 2 in cells expressing only one type of receptor. We then experimentally validated model predictions that co-expression of CXCR4 and CXCR7 on the same cell substantially decreases both the magnitude and duration of CXCL12-regulated recruitment of \u03b2-arrestin 2 to CXCR4. Co-expression of both receptors on the same cell only minimally alters recruitment of \u03b2-arrestin 2 to CXCR7. In silico experiments also identified \u03b2-arrestin 2 as a limiting factor in cells expressing both receptors, establishing that CXCR7 wins the \"competition\" with CXCR4 for CXCL12 and recruitment of \u03b2-arrestin 2. These results reveal how competition for \u03b2-arrestin 2 controls integrated responses to CXCL12 in cells expressing both CXCR4 and CXCR7. These results advance understanding of normal and pathologic functions of CXCL12, which is critical for developing effective strategies to target these pathways therapeutically.",
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- "tag": "BioModels"
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- "id": 4011,
- "tag": "BioModels:BIOMD0000000599"
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- "id": 4012,
- "tag": "CXCL12-activated CXCR4 signaling pathway"
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- "id": 4013,
- "tag": "Chemokine (C-X-C motif) ligand 12 signaling pathway"
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- {
- "id": 3002,
- "tag": "Homo sapiens"
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- "id": 704,
- "tag": "SBML"
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- "timestamp_created": "2025-01-30 13:54:06.593126+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000000599",
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- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
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- "username": "osbadmin"
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- "default_context": "3",
- "id": 2890,
- "name": "Celli\u00e8re2011 - Plasticity of TGF-\u03b2 Signalling",
- "repository_type": "biomodels",
- "summary": "
Celli\u00e8re2011 - Plasticity of TGF-\u03b2 Signalling
Transforming growth factor beta (TGF-\u03b2) signalling has been implicated as an important regulator of almost all major cell behaviours, including proliferation, differentiation, cell death, and motility. It remains unclear that how the TGF-\u03b2 signalling pathway accomplishes the flexibility in its responses. What and how many parameters have to be altered for cells to respond differently to perform complex tasks? This canonical response has been explored in this model, by considering the core signalling architecture of TGF-\u03b2 pathway.
The family of TGF-\u03b2 ligands is large and its members are involved in many different signaling processes. These signaling processes strongly differ in type with TGF-\u03b2 ligands eliciting both sustained or transient responses. Members of the TGF-\u03b2 family can also act as morphogen and cellular responses would then be expected to provide a direct read-out of the extracellular ligand concentration. A number of different models have been proposed to reconcile these different behaviours. We were interested to define the set of minimal modifications that are required to change the type of signal processing in the TGF-\u03b2 signaling network.\t\tRESULTS:To define the key aspects for signaling plasticity we focused on the core of the TGF-\u03b2 signaling network. With the help of a parameter screen we identified ranges of kinetic parameters and protein concentrations that give rise to transient, sustained, or oscillatory responses to constant stimuli, as well as those parameter ranges that enable a proportional response to time-varying ligand concentrations (as expected in the read-out of morphogens). A combination of a strong negative feedback and fast shuttling to the nucleus biases signaling to a transient rather than a sustained response, while oscillations were obtained if ligand binding to the receptor is weak and the turn-over of the I-Smad is fast. A proportional read-out required inefficient receptor activation in addition to a low affinity of receptor-ligand binding. We find that targeted modification of single parameters suffices to alter the response type. The intensity of a constant signal (i.e. the ligand concentration), on the other hand, affected only the strength but not the type of the response.CONCLUSIONS:The architecture of the TGF-\u03b2 pathway enables the observed signaling plasticity. The observed range of signaling outputs to TGF-\u03b2 ligand in different cell types and under different conditions can be explained with differences in cellular protein concentrations and with changes in effective rate constants due to cross-talk with other signaling pathways. It will be interesting to uncover the exact cellular differences as well as the details of the cross-talks in future work.
To cite BioModels Database, please use: BioModels Database: An enhanced, curated and annotated resource for published quantitative kinetic models. PMID: 20587024 .
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to [CC0 Public Domain Dedication>http://creativecommons.org/publicdomain/zero/1.0/] for more information.
This SBML model reproduced the calcium release from SR by application of 20 mM or 2mM caffeine, described in the paper. * Ca_i_Total and Ca_SR_Total respectively represent the total calcium concentration in the sarcoplasm and in the sarcoplasmic reticulum. * Ca_i and Ca_SR respectively represent the free calcium concentration in the sarcoplasm and the sarcoplasmic reticulum.* J1 is the calcium flux due to all mechanisms (except SERCA pumps) that remove the excess of calcium from the sarcoplasm.* J2 is the calcium flux from the reticulum to the sarcoplasm via the ryanodine receptors (RyR) present in the reticulum membrane.* J3 is the calcium flux from the sarcoplasm to the reticulum by the SERCA pumps located in the reticulum membrane.*The parameters are a, b, B c, Ca_i_basal, Ca_SR_basal, caff, csq, gamma, KC, kf, KR, Ks, nf, ns and nv.* The value of KC for the model were calculated for J2=J3, after substituting Ca_i=Ca_i_basal, Ca_SR=Ca_SR_basal and caff=0. * Po represents the RyR open probability based on CICR. * Caffeine (caff)** increases the calcium affinity of smooth muscle's RyR so they open even when calcium is at basal level.** Due to caffeine-induced calcium release, a 5 seconds pulse of caffeine (20 mM) was applied (event called Caff_ON) at 10 seconds after the simulation starts. The event called Caff_OFF starts when the pulse of caffeine finished (caff=0).* PE denotes the concentration of calcium binding sites. * Xi=Ca_SR_Total+PE+KR*In order to reproduce the dynamics of calcium following the application of 2 mM of caffeine, the value of some parameters needs to be change: b=35, Ca_i_basal=9.257e-6, gamma=7.45, caff=0.002 and the initial condition for Ca_i_Total=9.257e-6.*The unit of the calcium concentration is mol/L.* The unit of time is second. *The original SBML code was exported from COPASI 4.12 (Build 81).
Stavrum AK, Heiland I, Schuster S, Puntervoll P, Ziegler M.
J. Biol. Chem. 2013 Nov; 288(48): 34555-34566
Abstract:
Tryptophan is utilized in various metabolic routes including protein synthesis, serotonin, and melatonin synthesis and the kynurenine pathway. Perturbations in these pathways have been associated with neurodegenerative diseases and cancer. Here we present a comprehensive kinetic model of the complex network of human tryptophan metabolism based upon existing kinetic data for all enzymatic conversions and transporters. By integrating tissue-specific expression data, modeling tryptophan metabolism in liver and brain returned intermediate metabolite concentrations in the physiological range. Sensitivity and metabolic control analyses identified expected key enzymes to govern fluxes in the branches of the network. Combining tissue-specific models revealed a considerable impact of the kynurenine pathway in liver on the concentrations of neuroactive derivatives in the brain. Moreover, using expression data from a cancer study predicted metabolite changes that resembled the experimental observations. We conclude that the combination of the kinetic model with expression data represents a powerful diagnostic tool to predict alterations in tryptophan metabolism. The model is readily scalable to include more tissues, thereby enabling assessment of organismal tryptophan metabolism in health and disease.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
",
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- "id": 2936,
- "tag": "BioModels"
- },
- {
- "id": 4017,
- "tag": "BioModels:BIOMD0000000602"
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- "id": 3002,
- "tag": "Homo sapiens"
- },
- {
- "id": 704,
- "tag": "SBML"
- },
- {
- "id": 4018,
- "tag": "Serotonin biosynthetic process from tryptophan"
- },
- {
- "id": 4019,
- "tag": "Tryptophan metabolic process"
- }
- ],
- "timestamp_created": "2025-01-30 14:02:26.697499+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000000602",
- "user": {
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- "first_name": "OSB",
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Palsson2013 - Fully-integration immune response model (FIRM)
FIRM (The Fully-integrated Immune Response Modeling) is a hybrid construct incorporating multiple existing models of the immune system [De Boer et al., (1985);Bell, (1970); Marino and Kirschner, (2004) ]. FIRM used a pharmacokinetic / pharmacodynamic modelling approach to combine previously published individual models of humoral and cellular response with antigen exposure. This integrated model has a potential to simulate a range of responses under a variety of conditions, for example, the immune response against tuberculosis infection, blood borne pathogen infection, Spontaneous tumour rejection and influence of regulatory T cells (Treg) on tumour rejection.
The SBML model provided here was generated from the matlab code (provided by the authors). The matlab to SBML conversion was done using MOCCASIN version 1.1.0. This model describes the immune response against tuberculosis (TB) infection and reproduces figure 7 of the reference publication.
Note:The following minor edit to the original matlab code was done during the conversion to SBML: The model had two parameters named k3 and K3. To avoid case-insensitive issues during the conversion, K3 was changed to K3s in the original matlap code before using the conversion software. The matlab code of the model provided by the authors (with the above change) can be obtained from the curation tab.
Palsson S, Hickling TP, Bradshaw-Pierce EL, Zager M, Jooss K, O'Brien PJ, Spilker ME, Palsson BO, Vicini P.
BMC Syst Biol. 2013 Sep 28;7:95.
Abstract:
BACKGROUND: The complexity and multiscale nature of the mammalian immune response provides an excellent test bed for the potential of mathematical modeling and simulation to facilitate mechanistic understanding. Historically, mathematical models of the immune response focused on subsets of the immune system and/or specific aspects of the response. Mathematical models have been developed for the humoral side of the immune response, or for the cellular side, or for cytokine kinetics, but rarely have they been proposed to encompass the overall system complexity. We propose here a framework for integration of subset models, based on a system biology approach. RESULTS: A dynamic simulator, the Fully-integrated Immune Response Model (FIRM), was built in a stepwise fashion by integrating published subset models and adding novel features. The approach used to build the model includes the formulation of the network of interacting species and the subsequent introduction of rate laws to describe each biological process. The resulting model represents a multi-organ structure, comprised of the target organ where the immune response takes place, circulating blood, lymphoid T, and lymphoid B tissue. The cell types accounted for include macrophages, a few T-cell lineages (cytotoxic, regulatory, helper 1, and helper 2), and B-cell activation to plasma cells. Four different cytokines were accounted for: IFN-\u03b3, IL-4, IL-10 and IL-12. In addition, generic inflammatory signals are used to represent the kinetics of IL-1, IL-2, and TGF-\u03b2. Cell recruitment, differentiation, replication, apoptosis and migration are described as appropriate for the different cell types. The model is a hybrid structure containing information from several mammalian species. The structure of the network was built to be physiologically and biochemically consistent. Rate laws for all the cellular fate processes, growth factor production rates and half-lives, together with antibody production rates and half-lives, are provided. The results demonstrate how this framework can be used to integrate mathematical models of the immune response from several published sources and describe qualitative predictions of global immune system response arising from the integrated, hybrid model. In addition, we show how the model can be expanded to include novel biological findings. Case studies were carried out to simulate TB infection, tumor rejection, response to a blood borne pathogen and the consequences of accounting for regulatory T-cells. CONCLUSIONS: The final result of this work is a postulated and increasingly comprehensive representation of the mammalian immune system, based on physiological knowledge and susceptible to further experimental testing and validation. We believe that the integrated nature of FIRM has the potential to simulate a range of responses under a variety of conditions, from modeling of immune responses after tuberculosis (TB) infection to tumor formation in tissues. FIRM also has the flexibility to be expanded to include both complex and novel immunological response features as our knowledge of the immune system advances.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
Reddyhoff2015 - Acetaminophen metabolism and toxicity
This model examines acetaminophen metabolism and related hepatotoxicity. Multiple pathways associated with APAP metabolism has been included in the model. Using numerical, sensitivity and timescale analysis, key parameters involved in the toxicity has been identified. The model analysis highlights a critical acetaminophen dose in terms of the model parameters.
Acetaminophen is a widespread and commonly used painkiller all over the world. However, it can cause liver damage when taken in large doses or at repeated chronic doses. Current models of acetaminophen metabolism are complex, and limited to numerical investigation though provide results that represent clinical investigation well. We derive a mathematical model based on mass action laws aimed at capturing the main dynamics of acetaminophen metabolism, in particular the contrast between normal and overdose cases, whilst remaining simple enough for detailed mathematical analysis that can identify key parameters and quantify their role in liver toxicity. We use singular perturbation analysis to separate the different timescales describing the sequence of events in acetaminophen metabolism, systematically identifying which parameters dominate during each of the successive stages. Using this approach we determined, in terms of the model parameters, the critical dose between safe and overdose cases, timescales for exhaustion and regeneration of important cofactors for acetaminophen metabolism and total toxin accumulation as a fraction of initial dose.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
Petelenz-Kurdziel E, Kuehn C, Nordlander B, Klein D, Hong KK, Jacobson T, Dahl P, Schaber J, Nielsen J, Hohmann S, Klipp E.
PLoS Comput. Biol. 2013; 9(6): e1003084
Abstract:
We provide an integrated dynamic view on a eukaryotic osmolyte system, linking signaling with regulation of gene expression, metabolic control and growth. Adaptation to osmotic changes enables cells to adjust cellular activity and turgor pressure to an altered environment. The yeast Saccharomyces cerevisiae adapts to hyperosmotic stress by activating the HOG signaling cascade, which controls glycerol accumulation. The Hog1 kinase stimulates transcription of genes encoding enzymes required for glycerol production (Gpd1, Gpp2) and glycerol import (Stl1) and activates a regulatory enzyme in glycolysis (Pfk26/27). In addition, glycerol outflow is prevented by closure of the Fps1 glycerol facilitator. In order to better understand the contributions to glycerol accumulation of these different mechanisms and how redox and energy metabolism as well as biomass production are maintained under such conditions we collected an extensive dataset. Over a period of 180 min after hyperosmotic shock we monitored in wild type and different mutant cells the concentrations of key metabolites and proteins relevant for osmoadaptation. The dataset was used to parameterize an ODE model that reproduces the generated data very well. A detailed computational analysis using time-dependent response coefficients showed that Pfk26/27 contributes to rerouting glycolytic flux towards lower glycolysis. The transient growth arrest following hyperosmotic shock further adds to redirecting almost all glycolytic flux from biomass towards glycerol production. Osmoadaptation is robust to loss of individual adaptation pathways because of the existence and upregulation of alternative routes of glycerol accumulation. For instance, the Stl1 glycerol importer contributes to glycerol accumulation in a mutant with diminished glycerol production capacity. In addition, our observations suggest a role for trehalose accumulation in osmoadaptation and that Hog1 probably directly contributes to the regulation of the Fps1 glycerol facilitator. Taken together, we elucidated how different metabolic adaptation mechanisms cooperate and provide hypotheses for further experimental studies.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
A number of therapeutics have been developed or are under development aiming to modulate the coagulation network to treat various diseases. We used a systems model to better understand the effect of modulating various components on blood coagulation. A computational model of the coagulation network was built to match in-house in vitro thrombin generation and activated Partial Thromboplastin Time (aPTT) data with various concentrations of recombinant factor VIIa (FVIIa) or factor Xa added to normal human plasma or factor VIII-deficient plasma. Sensitivity analysis applied to the model revealed that lag time, peak thrombin concentration, area under the curve (AUC) of the thrombin generation profile, and aPTT show different sensitivity to changes in coagulation factors' concentrations and type of plasma used (normal or factor VIII-deficient). We also used the model to explore how variability in concentrations of the proteins in coagulation network can impact the response to FVIIa treatment.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
Bone remodeling is the continuous process of bone resorption by osteoclasts and bone formation by osteoblasts, in order to maintain homeostasis. The activity of osteoclasts and osteoblasts is regulated by a network of signaling pathways, including Wnt, parathyroid hormone (PTH), RANK ligand/osteoprotegrin, and TGF-?, in response to stimuli, such as mechanical loading. During aging there is a gradual loss of bone mass due to dysregulation of signaling pathways. This may be due to a decline in physical activity with age and/or changes in hormones and other signaling molecules. In particular, hormones, such as PTH, have a circadian rhythm, which may be disrupted in aging. Due to the complexity of the molecular and cellular networks involved in bone remodeling, several mathematical models have been proposed to aid understanding of the processes involved. However, to date, there are no models, which explicitly consider the effects of mechanical loading, the circadian rhythm of PTH, and the dynamics of signaling molecules on bone remodeling. Therefore, we have constructed a network model of the system using a modular approach, which will allow further modifications as required in future research. The model was used to simulate the effects of mechanical loading and also the effects of different interventions, such as continuous or intermittent administration of PTH. Our model predicts that the absence of regular mechanical loading and/or an impaired PTH circadian rhythm leads to a gradual decrease in bone mass over time, which can be restored by simulated interventions and that the effectiveness of some interventions may depend on their timing.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
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- "summary": "<notes xmlns="http://www.sbml.org/sbml/level3/version1/core"> <body xmlns="http://www.w3.org/1999/xhtml"> <div class="dc:title">Peterson2010 - integrated calcium homeostasisand bone remodelling</div><div class="dc:description"> </div><div class="dc:bibliographicCitation"> <p>This model is described in the article:</p> <div class="bibo:title"> <a href="http://identifiers.org/pubmed/19732857" title="Access to this publication">A physiologically based mathematical model of integrated calcium homeostasis and bone remodeling.</a> </div> <div class="bibo:authorList">Peterson MC, Riggs MM.</div> <div class="bibo:Journal">Bone 2010 Jan; 46(1): 49-63</div> <p>Abstract:</p> <div class="bibo:abstract"> <p>Bone biology is physiologically complex and intimately linked to calcium homeostasis. The literature provides a wealth of qualitative and/or quantitative descriptions of cellular mechanisms, bone dynamics, associated organ dynamics, related disease sequela, and results of therapeutic interventions. We present a physiologically based mathematical model of integrated calcium homeostasis and bone biology constructed from literature data. The model includes relevant cellular aspects with major controlling mechanisms for bone remodeling and calcium homeostasis and appropriately describes a broad range of clinical and therapeutic conditions. These include changes in plasma parathyroid hormone (PTH), calcitriol, calcium and phosphate (PO4), and bone-remodeling markers as manifested by hypoparathyroidism and hyperparathyroidism, renal insufficiency, daily PTH 1-34 administration, and receptor activator of NF-kappaB ligand (RANKL) inhibition. This model highlights the utility of systems approaches to physiologic modeling in the bone field. The presented bone and calcium homeostasis model provides an integrated mathematical construct to conduct hypothesis testing of influential system aspects, to visualize elements of this complex endocrine system, and to continue to build upon iteratively with the results of ongoing scientific research.</p> </div></div><div class="dc:publisher"> <p>This model is hosted on <a href="http://www.ebi.ac.uk/biomodels/">BioModels Database</a> and identified by: <a href="http://identifiers.org/biomodels.db/BIOMD0000000613">BIOMD0000000613</a>.</p> <p>To cite BioModels Database, please use: <a href="http://identifiers.org/pubmed/20587024" title="Latest BioModels Database publication">BioModels Database: An enhanced, curated and annotated resource for published quantitative kinetic models</a>.</p></div><div class="dc:license"> <p>To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to <a href="http://creativecommons.org/publicdomain/zero/1.0/" title="Access to: CC0 1.0 Universal (CC0 1.0), Public Domain Dedication">CC0 Public Domain Dedication</a> for more information.</p></div></body> </notes>",
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- "timestamp_created": "2025-01-30 14:02:33.851933+00:00",
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- "name": "Kamihira2000 - calcitonin fibrillation kinetics",
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Kamihira2000 - calcitonin fibrillation kinetics
This model studies the kinetics of human calcitonin fibrillation described as a two-step process. Empirical data is used to determine the parameter values. Results show that the first step in fibrillation is a slow homogenous reaction and the second step is a fast autocatalytic heterogenous reaction.
Kamihira M, Naito A, Tuzi S, Nosaka AY, Sait\u00f4 H.
Protein Sci. 2000 May; 9(5): 867-877
Abstract:
Conformational transitions of human calcitonin (hCT) during fibril formation in the acidic and neutral conditions were investigated by high-resolution solid-state 13C NMR spectroscopy. In aqueous acetic acid solution (pH 3.3), a local alpha-helical form is present around Gly10 whereas a random coil form is dominant as viewed from Phe22, Ala26, and Ala31 in the monomer form on the basis of the 13C chemical shifts. On the other hand, a local beta-sheet form as viewed from Gly10 and Phe22, and both beta-sheet and random coil as viewed from Ala26 and Ala31 were detected in the fibril at pH 3.3. The results indicate that conformational transitions from alpha-helix to beta-sheet, and from random coil to beta-sheet forms occurred in the central and C-terminus regions, respectively, during the fibril formation. The increased 13C resonance intensities of fibrils after a certain delay time suggests that the fibrillation can be explained by a two-step reaction mechanism in which the first step is a homogeneous association to form a nucleus, and the second step is an autocatalytic heterogeneous fibrillation. In contrast to the fibril at pH 3.3, the fibril at pH 7.5 formed a local beta-sheet conformation at the central region and exhibited a random coil at the C-terminus region. Not only a hydrophobic interaction among the amphiphilic alpha-helices, but also an electrostatic interaction between charged side chains can play an important role for the fibril formation at pH 7.5 and 3.3 acting as electrostatically favorable and unfavorable interactions, respectively. These results suggest that hCT fibrils are formed by stacking antiparallel beta-sheets at pH 7.5 and a mixture of antiparallel and parallel beta-sheets at pH 3.3.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
Kuznetsov2016(II) - \u03b1-syn aggregationkinetics in Parkinson's
This theoretical model uses 2-step Finke-Watzky (FW) kineticstodescribe the production, misfolding, aggregation, transport anddegradation of \u03b1-syn that may lead to Parkinson's Disease(PD). Deregulated \u03b1-syn degradation is predicted to becrucialfor PD pathogenesis.
The aim of this paper is to develop a minimal model describing events leading to the onset of Parkinson's disease (PD). The model accounts for \u03b1-synuclein (\u03b1-syn) production in the soma, transport toward the synapse, misfolding, and aggregation. The production and aggregation of polymeric \u03b1-syn is simulated using a minimalistic 2-step Finke-Watzky model. We utilized the developed model to analyze what changes in a healthy neuron are likely to lead to the onset of \u03b1-syn aggregation. We checked the effects of interruption of \u03b1-syn transport toward the synapse, entry of misfolded (infectious) \u03b1-syn into the somatic and synaptic compartments, increasing the rate of \u03b1-syn synthesis in the soma, and failure of \u03b1-syn degradation machinery. Our model suggests that failure of \u03b1-syn degradation machinery is probably the most likely cause for the onset of \u03b1-syn aggregation leading to PD.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
This is a sub-model of a three-stepinflammatory response modelling study. The model includes distinctpopulations of white blood cells namely, macrophages and active andapoptotic neutrophil populations. Neutrophil apoptosis rate ispredicted to be crucial for the qualitative nature of thesystem.
There is growing interest in inflammation due to its involvement in many diverse medical conditions, including Alzheimer's disease, cancer, arthritis and asthma. The traditional view that resolution of inflammation is a passive process is now being superceded by an alternative hypothesis whereby its resolution is an active, anti-inflammatory process that can be manipulated therapeutically. This shift in mindset has stimulated a resurgence of interest in the biological mechanisms by which inflammation resolves. The anti-inflammatory processes central to the resolution of inflammation revolve around macrophages and are closely related to pro-inflammatory processes mediated by neutrophils and their ability to damage healthy tissue. We develop a spatially averaged model of inflammation centring on its resolution, accounting for populations of neutrophils and macrophages and incorporating both pro- and anti-inflammatory processes. Our ordinary differential equation model exhibits two outcomes that we relate to healthy and unhealthy states. We use bifurcation analysis to investigate how variation in the system parameters affects its outcome. We find that therapeutic manipulation of the rate of macrophage phagocytosis can aid in resolving inflammation but success is critically dependent on the rate of neutrophil apoptosis. Indeed our model predicts that an effective treatment protocol would take a dual approach, targeting macrophage phagocytosis alongside neutrophil apoptosis.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
Reproducibility of biological data is a significant problem in research today. One potential contributor to this, which has received little attention, is the over complication of enzyme kinetic inhibition models. The over complication of inhibitory models stems from the common use of the inhibitory term (1 + [I]/Ki ), an equilibrium binding term that does not distinguish between inhibitor binding and inhibitory effect. Since its initial appearance in the literature, around a century ago, the perceived mechanistic methods used in its production have spurred countless inhibitory equations. These equations are overly complex and are seldom compared to each other, which has destroyed their usefulness resulting in the proliferation and regulatory acceptance of simpler models such as IC50s for drug characterization. However, empirical analysis of inhibitory data recognizing the clear distinctions between inhibitor binding and inhibitory effect can produce simple logical inhibition models. In contrast to the common divergent practice of generating new inhibitory models for every inhibitory situation that presents itself. The empirical approach to inhibition modeling presented here is broadly applicable allowing easy comparison and rational analysis of drug interactions. To demonstrate this, a simple kinetic model of DAPT, a compound that both activates and inhibits ?-secretase is examined using excel. The empirical kinetic method described here provides an improved way of probing disease mechanisms, expanding the investigation of possible therapeutic interventions.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
Krohn M, Lange C, Hofrichter J, Scheffler K, Stenzel J, Steffen J, Schumacher T, Br\u00fcning T, Plath AS, Alfen F, Schmidt A, Winter F, Rateitschak K, Wree A, Gsponer J, Walker LC, Pahnke J.
J. Clin. Invest. 2011 Oct; 121(10): 3924-3931
Abstract:
In Alzheimer disease (AD), the intracerebral accumulation of amyloid-\u03b2 (A\u03b2) peptides is a critical yet poorly understood process. A\u03b2 clearance via the blood-brain barrier is reduced by approximately 30% in AD patients, but the underlying mechanisms remain elusive. ABC transporters have been implicated in the regulation of A\u03b2 levels in the brain. Using a mouse model of AD in which the animals were further genetically modified to lack specific ABC transporters, here we have shown that the transporter ABCC1 has an important role in cerebral A\u03b2 clearance and accumulation. Deficiency of ABCC1 substantially increased cerebral A\u03b2 levels without altering the expression of most enzymes that would favor the production of A\u03b2 from the A\u03b2 precursor protein. In contrast, activation of ABCC1 using thiethylperazine (a drug approved by the FDA to relieve nausea and vomiting) markedly reduced A\u03b2 load in a mouse model of AD expressing ABCC1 but not in such mice lacking ABCC1. Thus, by altering the temporal aggregation profile of A\u03b2, pharmacological activation of ABC transporters could impede the neurodegenerative cascade that culminates in the dementia of AD.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
Basic PBPK (Physiologically Based PharmacoKinetic) model of Acetaminophen.
This is a basic model of Acetaminophen (APAP, Paracetamol) pharmacokinetics in humans. Many of the model parameters (compartment volumes, volumetric flow rates, etc.) are scaled allometrically based on the body weight (BW) raised to the\t\t\t3/4 power. Because of that, the assigned values of many of the parameters are recalculated at run time and are different \t\t\tthan the default values for the particular entity (e.g., the volume of a compartment and the volumetric flow rate between compartments).
APAP dose is initially given in grams (APAP_Dose_gram), which is converted to moles via the APAP molecular weight (APAP_MW).\t\t\tAPAP quantities throughout the rest of the models are given in moles.
The base parameters are for a 70Kg human and a pharmacological oral dose of 1.4 gram of APAP. Metabolism is modelled as a single ODE in the liver compartment and the metabolite does not leave that compartment.
This model is loosely based on the model of Wambaugh and Shaw (PLoS Comput Biol. 2010 Apr 22;6(4):e1000756. doi: 10.1371/journal.pcbi.1000756. Pubmed ID: PMID- 20421935) with the following changes:
The lung lumen compartment was omitted.
A kidney compartment was added.
Glomerular Filtration is from the kidney compartment.
The APAP dose was changed to 1.4g.
The gut adsorption rate constant (KGutabs), tissue partition coefficients and liver metabolism rate constant (CLmetabolism) were fit using the human in vivo data of Critchley (Critchley, J. A., Critchley, L. A. H., Anderson, P. J., and Tomlinson, B. 2005 Journal of clinical pharmacy and therapeutics, 30(2), 179-184).
To model the extensive re-adsorption of APAP from the kidney tubules back into the blood the QGfr value is modified. This was done by \t\t\t\tchanging the scaling parameter QGFR_ref value from 0.31 to 0.039, resulting in a decrease in the QGfr value of 8 fold (from 7.2 L/hr to 0.91 L/hr).
The parameters in this file are the REFSIM parameters from our publication.
Palmer2014 - Effect of IL-1\u03b2-Blocking therapies in T2DM - Disease Condition
\t
This is the model with disease state initial conditions. A few changes were made to the model equations in order to bypass the circular dependencies apparent in SBML. Coupled algebraic equations for the species Glucose, Insulin and Proinsulin were changed to reactions which represent the ordinary differential equations found in a previously published model by De Gaetanoet al (2008), [MODEL1112110003]. This reference was used by the present authors for the algebraic equations. The original Mathematica code, obtained from the supplementary material of the article can be downloaded from the link below: [Palmer2014_notebook.nb].\t
Palm\u00e9r R, Nyman E, Penney M, Marley A, Cedersund G, Agoram B.
CPT Pharmacometrics Syst Pharmacol. 2014 Jun 11;3:e118.
Abstract:
Recent clinical studies suggest sustained treatment effects of interleukin-1\u03b2 (IL-1\u03b2)-blocking therapies in type 2 diabetes mellitus. The underlying mechanisms of these effects, however, remain underexplored. Using a quantitative systems pharmacology modeling approach, we combined ex vivo data of IL-1\u03b2 effects on \u03b2-cell function and turnover with a disease progression model of the long-term interactions between insulin, glucose, and \u03b2-cell mass in type 2 diabetes mellitus. We then simulated treatment effects of the IL-1 receptor antagonist anakinra. The result was a substantial and partly sustained symptomatic improvement in \u03b2-cell function, and hence also in HbA1C, fasting plasma glucose, and proinsulin-insulin ratio, and a small increase in \u03b2-cell mass. We propose that improved \u03b2-cell function, rather than mass, is likely to explain the main IL-1\u03b2-blocking effects seen in current clinical data, but that improved \u03b2-cell mass might result in disease-modifying effects not clearly distinguishable until >1 year after treatment.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
Palmer2014 - Effect of IL-1\u03b2-Blocking therapies in T2DM - Healthy Condition
\t
This is the model with healthy state initial conditions. A few changes were made to the model equations in order to bypass the circular dependencies apparent in SBML. Coupled algebraic equations for the species Glucose, Insulin and Proinsulin were changed to reactions which represent the ordinary differential equations found in a previously published model by De Gaetanoet al (2008), [MODEL1112110003]. This reference was used by the present authors for the algebraic equations. The original Mathematica code, obtained from the supplementary material of the article can be downloaded from the link below: [Palmer2014_notebook.nb].\t
Palm\u00e9r R, Nyman E, Penney M, Marley A, Cedersund G, Agoram B.
CPT Pharmacometrics Syst Pharmacol. 2014 Jun 11;3:e118.
Abstract:
Recent clinical studies suggest sustained treatment effects of interleukin-1\u03b2 (IL-1\u03b2)-blocking therapies in type 2 diabetes mellitus. The underlying mechanisms of these effects, however, remain underexplored. Using a quantitative systems pharmacology modeling approach, we combined ex vivo data of IL-1\u03b2 effects on \u03b2-cell function and turnover with a disease progression model of the long-term interactions between insulin, glucose, and \u03b2-cell mass in type 2 diabetes mellitus. We then simulated treatment effects of the IL-1 receptor antagonist anakinra. The result was a substantial and partly sustained symptomatic improvement in \u03b2-cell function, and hence also in HbA1C, fasting plasma glucose, and proinsulin-insulin ratio, and a small increase in \u03b2-cell mass. We propose that improved \u03b2-cell function, rather than mass, is likely to explain the main IL-1\u03b2-blocking effects seen in current clinical data, but that improved \u03b2-cell mass might result in disease-modifying effects not clearly distinguishable until >1 year after treatment.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
NguyenLK2011 - Ubiquitination dynamics inRing1B-Bmi1 system
This theoretical model investigates thedynamics of Ring1B/Bmi1 ubiquitination to identify bistableswitch-like and oscillatory behaviour in thesystem.\u00a0Michaelis-Menten (MM) equations are used to formulatethe model. However, the authors show that the dynamics persist evenfor Mass-Action kinetics. This SBML file is the MM version of themodel.
In an active, self-ubiquitinated state, the Ring1B ligase monoubiquitinates histone H2A playing a critical role in Polycomb-mediated gene silencing. Following ubiquitination by external ligases, Ring1B is targeted for proteosomal degradation. Using biochemical data and computational modeling, we show that the Ring1B ligase can exhibit abrupt switches, overshoot transitions and self-perpetuating oscillations between its distinct ubiquitination and activity states. These different Ring1B states display canonical or multiply branched, atypical polyubiquitin chains and involve association with the Polycomb-group protein Bmi1. Bistable switches and oscillations may lead to all-or-none histone H2A monoubiquitination rates and result in discrete periods of gene (in)activity. Switches, overshoots and oscillations in Ring1B catalytic activity and proteosomal degradation are controlled by the abundances of Bmi1 and Ring1B, and the activities and abundances of external ligases and deubiquitinases, such as E6-AP and USP7.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
This model studies the aberrations inERK signalling for different cancer mutations. The authors alter apreviously existing EGF model (Brown et al 2004) to include newinteractions\u00a0that\u00a0better\u00a0fit empirical data.Predictions show that the ERK signalling is a robust mechanismtaking different courses for different cancer mutations. Mostparameter values are used from the previous model and the newparameters are\u00a0estimated using experimental data performed bythe authors on PC12 cells (adrenal gland, rat).\u00a0The authorsprovide an SBML version of the model in the paper.
Orton RJ, Adriaens ME, Gormand A, Sturm OE, Kolch W, Gilbert DR.
BMC Syst Biol 2009 Oct; 3: 100
Abstract:
The Epidermal Growth Factor Receptor (EGFR) activated Extracellular-signal Regulated Kinase (ERK) pathway is a critical cell signalling pathway that relays the signal for a cell to proliferate from the plasma membrane to the nucleus. Deregulation of the EGFR/ERK pathway due to alterations affecting the expression or function of a number of pathway components has long been associated with numerous forms of cancer. Under normal conditions, Epidermal Growth Factor (EGF) stimulates a rapid but transient activation of ERK as the signal is rapidly shutdown. Whereas, under cancerous mutation conditions the ERK signal cannot be shutdown and is sustained resulting in the constitutive activation of ERK and continual cell proliferation. In this study, we have used computational modelling techniques to investigate what effects various cancerous alterations have on the signalling flow through the ERK pathway.We have generated a new model of the EGFR activated ERK pathway, which was verified by our own experimental data. We then altered our model to represent various cancerous situations such as Ras, B-Raf and EGFR mutations, as well as EGFR overexpression. Analysis of the models showed that different cancerous situations resulted in different signalling patterns through the ERK pathway, especially when compared to the normal EGF signal pattern. Our model predicts that cancerous EGFR mutation and overexpression signals almost exclusively via the Rap1 pathway, predicting that this pathway is the best target for drugs. Furthermore, our model also highlights the importance of receptor degradation in normal and cancerous EGFR signalling, and suggests that receptor degradation is a key difference between the signalling from the EGF and Nerve Growth Factor (NGF) receptors.Our results suggest that different routes to ERK activation are being utilised in different cancerous situations which therefore has interesting implications for drug selection strategies. We also conducted a comparison of the critical differences between signalling from different growth factor receptors (namely EGFR, mutated EGFR, NGF, and Insulin) with our results suggesting the difference between the systems are large scale and can be attributed to the presence/absence of entire pathways rather than subtle difference in individual rate constants between the systems.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
Liver metabolism of Acetaminophen: Acetaminophen (APAP) ismetabolized in the liver in both Phase I and Phase II reactions.Phase II reactions convert APAP to APAP-glucuronide andAPAP-sulfate. Phase I reactions involve Cytochrome P450 mediated(mostly Cyp450-2E1 and -1A2) conversion of APAP toN-acetyle-p-quinoneimine (NAPQI), which goes on to react withcellular nucleophiles such as glutathione (GSH). At high doses ofAPAP significant GSH depletion in hepatocyte occurs resulting incell necrosis and and in extreme cases death.
Sluka JP, Fu X, Swat M, Belmonte JM, Cosmanescu A, Clendenon SG, Wambaugh JF, Glazier JA.
PLoS ONE 2016; 11(9): e0162428
Abstract:
We describe a multi-scale, liver-centric in silico modeling framework for acetaminophen pharmacology and metabolism. We focus on a computational model to characterize whole body uptake and clearance, liver transport and phase I and phase II metabolism. We do this by incorporating sub-models that span three scales; Physiologically Based Pharmacokinetic (PBPK) modeling of acetaminophen uptake and distribution at the whole body level, cell and blood flow modeling at the tissue/organ level and metabolism at the sub-cellular level. We have used standard modeling modalities at each of the three scales. In particular, we have used the Systems Biology Markup Language (SBML) to create both the whole-body and sub-cellular scales. Our modeling approach allows us to run the individual sub-models separately and allows us to easily exchange models at a particular scale without the need to extensively rework the sub-models at other scales. In addition, the use of SBML greatly facilitates the inclusion of biological annotations directly in the model code. The model was calibrated using human in vivo data for acetaminophen and its sulfate and glucuronate metabolites. We then carried out extensive parameter sensitivity studies including the pairwise interaction of parameters. We also simulated population variation of exposure and sensitivity to acetaminophen. Our modeling framework can be extended to the prediction of liver toxicity following acetaminophen overdose, or used as a general purpose pharmacokinetic model for xenobiotics.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
Leber2016 - Expanded model of Tfh-Tfrdifferentiation - Helicobacter pylori infection
The parameters used in the model wereobtained from experiments conducted by the authors, previouspublications [ 1, 2, 3] andparameter optimisation carried out in the paper using particleswarm and genetic algorithms.\u00a0
Leber A, Abedi V, Hontecillas R, Viladomiu M, Hoops S, Ciupe S, Caughman J, Andrew T, Bassaganya-Riera J.
J. Theor. Biol. 2016 Jun; 398: 74-84
Abstract:
T follicular helper (Tfh) cells are a highly plastic subset of CD4+ T cells specialized in providing B cell help and promoting inflammatory and effector responses during infectious and immune-mediate diseases. Helicobacter pylori is the dominant member of the gastric microbiota and exerts both beneficial and harmful effects on the host. Chronic inflammation in the context of H. pylori has been linked to an upregulation in T helper (Th)1 and Th17 CD4+ T cell phenotypes, controlled in part by the cytokine, interleukin-21. This study investigates the differentiation and regulation of Tfh cells, major producers of IL-21, in the immune response to H. pylori challenge. To better understand the conditions influencing the promotion and inhibition of a chronically elevated Tfh population, we used top-down and bottom-up approaches to develop computational models of Tfh and T follicular regulatory (Tfr) cell differentiation. Stability analysis was used to characterize the presence of two bi-stable steady states in the calibrated Tfh/Tfr models. Stochastic simulation was used to illustrate the ability of the parameter set to dictate two distinct behavioral patterns. Furthermore, sensitivity analysis helped identify the importance of various parameters on the establishment of Tfh and Tfr cell populations. The core network model was expanded into a more comprehensive and predictive model by including cytokine production and signaling pathways. From the expanded network, the interaction between TGFB-Induced Factor Homeobox 1 (Tgif1) and the retinoid X receptor (RXR) was displayed to exert control over the determination of the Tfh response. Model simulations predict that Tgif1 and RXR respectively induce and curtail Tfh responses. This computational hypothesis was validated experimentally by assaying Tgif1, RXR and Tfh in stomachs of mice infected with H. pylori.
The impulse of RXR as shown in the paper(figure 7C) can be implemented by creating an event in the curatedSBML file.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
A mathematical representation of early meiotic events, particularly feedback mechanisms at the system level and phosphorylation of signalling molecules for regulating protein activities, is described here
BACKGROUND: Meiosis is the sexual reproduction process common to eukaryotes. The diploid yeast Saccharomyces cerevisiae undergoes meiosis in sporulation medium to form four haploid spores. Initiation of the process is tightly controlled by intricate networks of positive and negative feedback loops. Intriguingly, expression of early meiotic proteins occurs within a narrow time window. Further, sporulation efficiency is strikingly different for yeast strains with distinct mutations or genetic backgrounds. To investigate signal transduction pathways that regulate transient protein expression and sporulation efficiency, we develop a mathematical model using ordinary differential equations. The model describes early meiotic events, particularly feedback mechanisms at the system level and phosphorylation of signaling molecules for regulating protein activities.
RESULTS: The mathematical model is capable of simulating the orderly and transient dynamics of meiotic proteins including Ime1, the master regulator of meiotic initiation, and Ime2, a kinase encoded by an early gene. The model is validated by quantitative sporulation phenotypes of single-gene knockouts. Thus, we can use the model to make novel predictions on the cooperation between proteins in the signaling pathway. Virtual perturbations on feedback loops suggest that both positive and negative feedback loops are required to terminate expression of early meiotic proteins. Bifurcation analyses on feedback loops indicate that multiple feedback loops are coordinated to modulate sporulation efficiency. In particular, positive auto-regulation of Ime2 produces a bistable system with a normal meiotic state and a more efficient meiotic state.
CONCLUSIONS: By systematically scanning through feedback loops in the mathematical model, we demonstrate that, in yeast, the decisions to terminate protein expression and to sporulate at different efficiencies stem from feedback signals toward the master regulator Ime1 and the early meiotic protein Ime2. We argue that the architecture of meiotic initiation pathway generates a robust mechanism that assures a rapid and complete transition into meiosis. This type of systems-level regulation is a commonly used mechanism controlling developmental programs in yeast and other organisms. Our mathematical model uncovers key regulations that can be manipulated to enhance sporulation efficiency, an important first step in the development of new strategies for producing gametes with high quality and quantity.
To the extent possible under law, all copyright and related orneighbouring rights to this encoded model have been dedicated to the publicdomain worldwide. Please refer to CC0 Public DomainDedication for more information.
Felix Winter1,2, Catrin Bludszuweit-Philipp1 and Olaf Wolkenhauer2,3
Journal of Cerebral Blood Flow & Metabolism
Abstract:
Blood oxygen level-dependent functional magnetic resonance imaging (BOLD-fMRI) is a standard clinical tool for the detection of brain activation. In Alzheimer\u2019s disease (AD), task-related and resting state fMRI have been used to detect brain dysfunction. It has been shown that the shape of the BOLD response is affected in early AD. To correctly interpret these changes, the mechanisms responsible for the observed behaviour need to be known. The parameters of the canonical hemodynamic response function (HRF) commonly used in the analysis of fMRI data have no direct biological interpretation and cannot be used to answer this question. We here present a model that allows relating AD-specific changes in the BOLD shape to changes in the underlying energy metabolism. According to our findings, the classic view that differences in the BOLD shape are only attributed to changes in strength and duration of the stimulus does not hold. Instead, peak height, peak timing and full width at half maximum are sensitive to changes in the reaction rate of several metabolic reactions. Our systems-theoretic approach allows the use of patient-specific clinical data to predict dementia- driven changes in the HRF, which can be used to improve the results of fMRI analyses in AD patients.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
NMDA receptor dependent long-term potentiation (LTP) and long-term depression (LTD) are two prominent forms of synaptic plasticity, both of which are triggered by post-synaptic calcium elevation. To understand how calcium selectively stimulates two opposing processes, we developed a detailed computational model and performed simulations with different calcium input frequencies, amplitudes, and durations. We show that with a total amount of calcium ions kept constant, high frequencies of calcium pulses stimulate calmodulin more efficiently. Calcium input activates both calcineurin and Ca(2+)/calmodulin-dependent protein kinase II (CaMKII) at all frequencies, but increased frequencies shift the relative activation from calcineurin to CaMKII. Irrespective of amplitude and duration of the inputs, the total amount of calcium ions injected adjusts the sensitivity of the system to calcium input frequencies. At a given frequency, the quantity of CaMKII activated is proportional to the total amount of calcium. Thus, an input of a small amount of calcium at high frequencies can induce the same activation of CaMKII as a larger amount, at lower frequencies. Finally, the extent of activation of CaMKII signals with high calcium frequency is further controlled by other factors, including the availability of calmodulin, and by the potency of phosphatase inhibitors.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
Hesham Haffez, David R. Chisholm, Roy Valentine, Ehmke Pohl, Christopher Redfern and Andrew Whiting
MedChemComm
Abstract:
All-trans-retinoic acid (ATRA) and its synthetic analogues EC23 and EC19 direct cellular differentiation by interacting as ligands for the retinoic acid receptor (RAR\u00ce\u00b1, \u00ce\u00b2 and \u00ce\u00b3) family of nuclear receptor proteins. To date, a number of crystal structures of natural and synthetic ligands complexed to their target proteins have been solved, providing molecular level snap-shots of ligand binding. However, a deeper understanding of receptor and ligand flexibility and conformational freedom is required to develop stable and effective ATRA analogues for clinical use. Therefore, we have used molecular modelling techniques to define RAR interactions with ATRA and two synthetic analogues, EC19 and EC23, and compared their predicted biochemical activities to experimental measurements of relative ligand affinity and recruitment of coactivator proteins. A comprehensive molecular docking approach that explored the conformational space of the ligands indicated that ATRA is able to bind the three RAR proteins in a number of conformations with one extended structure being favoured. In contrast the biologically-distinct isomer, 9-cis-retinoic acid (9CRA), showed significantly less conformational flexibility in the RAR binding pockets. These findings were used to inform docking studies of the synthetic retinoids EC23 and EC19, and their respective methyl esters. EC23 was found to be an excellent mimic for ATRA, and occupied similar binding modes to ATRA in all three target RAR proteins. In comparison, EC19 exhibited an alternative binding mode which reduces the strength of key polar interactions in RAR\u00ce\u00b1/\u00ce\u00b3 but is well-suited to the larger RAR\u00ce\u00b2 binding pocket. In contrast, docking of the corresponding esters revealed the loss of key polar interactions which may explain the much reduced biological activity. Our computational results were complemented using an in vitro binding assay based on FRET measurements, which showed that EC23 was a strongly binding, pan-agonist of the RARs, while EC19 exhibited specificity for RAR\u00ce\u00b2, as predicted by the docking studies. These findings can account for the distinct behaviour of EC23 and EC19 in cellular differentiation assays, and additionally, the methods described herein can be further applied to the understanding of the molecular basis for the selectivity of different retinoids to RAR\u00ce\u00b1, \u00ce\u00b2 and \u00ce\u00b3.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
Venkatraman2011 - PLS-UPA behaviour in thepresence of substrate competition
The posibility of ultrasensitivity and bistable activation of PLS (Plasmin) and UPA (Urokinase-type plasminogen activator) in the presence of substrate competition is explained here using a mathematical model.\u00a0
Venkatraman L, Li H, Dewey CF Jr, White JK, Bhowmick SS, Yu H, Tucker-Kellogg L.
Biophys. J. 2011 Oct; 101(8): 1825-1834
Abstract:
Plasmin (PLS) and urokinase-type plasminogen activator (UPA) are ubiquitous proteases that regulate the extracellular environment. Although they are secreted in inactive forms, they can activate each other through proteolytic cleavage. This mutual interplay creates the potential for complex dynamics, which we investigated using mathematical modeling and in vitro experiments. We constructed ordinary differential equations to model the conversion of precursor plasminogen into active PLS, and precursor urokinase (scUPA) into active urokinase (tcUPA). Although neither PLS nor UPA exhibits allosteric cooperativity, modeling showed that cooperativity occurred at the system level because of substrate competition. Computational simulations and bifurcation analysis predicted that the system would be bistable over a range of parameters for cooperativity and positive feedback. Cell-free experiments with recombinant proteins tested key predictions of the model. PLS activation in response to scUPA stimulus was found to be cooperative in vitro. Finally, bistability was demonstrated in vitro by the presence of two significantly different steady-state levels of PLS activation for the same levels of stimulus. We conclude that ultrasensitive, bistable activation of UPA-PLS is possible in the presence of substrate competition. An ultrasensitive threshold for activation of PLS and UPA would have ramifications for normal and disease processes, including angiogenesis, metastasis, wound healing, and fibrosis.
The cooperativity parameter \"ci\" was missing in the original model. The parameter \"ci\" has been added to the added.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
De Caluw\u00e9 J, Xiao Q, Hermans C, Verbruggen N, Leloup JC, Gonze D.
Front Plant Sci 2016; 7: 74
Abstract:
The circadian clock is an endogenous timekeeper that allows organisms to anticipate and adapt to the daily variations of their environment. The plant clock is an intricate network of interlocked feedback loops, in which transcription factors regulate each other to generate oscillations with expression peaks at specific times of the day. Over the last decade, mathematical modeling approaches have been used to understand the inner workings of the clock in the model plant Arabidopsis thaliana. Those efforts have produced a number of models of ever increasing complexity. Here, we present an alternative model that combines a low number of equations and parameters, similar to the very earliest models, with the complex network structure found in more recent ones. This simple model describes the temporal evolution of the abundance of eight clock gene mRNA/protein and captures key features of the clock on a qualitative level, namely the entrained and free-running behaviors of the wild type clock, as well as the defects found in knockout mutants (such as altered free-running periods, lack of entrainment, or changes in the expression of other clock genes). Additionally, our model produces complex responses to various light cues, such as extreme photoperiods and non-24 h environmental cycles, and can describe the control of hypocotyl growth by the clock. Our model constitutes a useful tool to probe dynamical properties of the core clock as well as clock-dependent processes.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
Kollarovic G, Studencka M, Ivanova L, Lauenstein C, Heinze K, Lapytsko A, Talemi SR, Figueiredo AS, Schaber J.
Aging (Albany NY) 2016 Jan;
Abstract:
Excessive DNA damage can induce an irreversible cell cycle arrest, called senescence, which is generally perceived as an important tumour-suppressor mechanism. However, it is unclear how cells decide whether to senesce or not after DNA damage. By combining experimental data with a parameterized mathematical model we elucidate this cell fate decision at the G1-S transition. Our model provides a quantitative and conceptually new understanding of how human fibroblasts decide whether DNA damage is beyond repair and senesce. Model and data imply that the G1-S transition is regulated by a bistable hysteresis switch with respect to Cdk2 activity, which in turn is controlled by the Cdk2/p21 ratio rather than cyclin abundance. We experimentally confirm the resulting predictions that to induce senescence i) in healthy cells both high initial and elevated background DNA damage are necessary and sufficient, and ii) in already damaged cells much lower additional DNA damage is sufficient. Our study provides a mechanistic explanation of a) how noise in protein abundances allows cells to overcome the G1-S arrest even with substantial DNA damage, potentially leading to neoplasia, and b) how accumulating DNA damage with age increasingly sensitizes cells for senescence.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
Adaptation of the cellular metabolism to varying external conditions is brought about by regulated changes in the activity of enzymes and transporters. Hormone-dependent reversible enzyme phosphorylation and concentration changes of reactants and allosteric effectors are the major types of rapid kinetic enzyme regulation, whereas on longer time scales changes in protein abundance may also become operative. Here, we used a comprehensive mathematical model of the hepatic glucose metabolism of rat hepatocytes to decipher the relative importance of different regulatory modes and their mutual interdependencies in the hepatic control of plasma glucose homeostasis.Model simulations reveal significant differences in the capability of liver metabolism to counteract variations of plasma glucose in different physiological settings (starvation, ad libitum nutrient supply, diabetes). Changes in enzyme abundances adjust the metabolic output to the anticipated physiological demand but may turn into a regulatory disadvantage if sudden unexpected changes of the external conditions occur. Allosteric and hormonal control of enzyme activities allow the liver to assume a broad range of metabolic states and may even fully reverse flux changes resulting from changes of enzyme abundances alone. Metabolic control analysis reveals that control of the hepatic glucose metabolism is mainly exerted by enzymes alone, which are differently controlled by alterations in enzyme abundance, reversible phosphorylation, and allosteric effects.In hepatic glucose metabolism, regulation of enzyme activities by changes of reactants, allosteric effects, and reversible phosphorylation is equally important as changes in protein abundance of key regulatory enzymes.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
Proctor2013 - Effect of A\u03b2 immunisationin Alzheimer's disease (stochastic version)
Extension of a previously publishedstochastic model (designed to examine some of the key pathwaysinvolved in the aggregation of amyloid-beta (A\u03b2)\u00a0andthe micro-tubular binding protein tau (BIOMD0000000286,BIOMD0000000462))to include the main processes involved in passive and activeimmunisation against A\u03b2and then to demonstrate the effects of this intervention on solubleA\u03b2.\u00a0Thisis the stochastic version of the model, the deterministic versionis BIOMD0000000488.\u00a0
Progress in the development of therapeutic interventions to treat or slow the progression of Alzheimer's disease has been hampered by lack of efficacy and unforeseen side effects in human clinical trials. This setback highlights the need for new approaches for pre-clinical testing of possible interventions. Systems modelling is becoming increasingly recognised as a valuable tool for investigating molecular and cellular mechanisms involved in ageing and age-related diseases. However, there is still a lack of awareness of modelling approaches in many areas of biomedical research. We previously developed a stochastic computer model to examine some of the key pathways involved in the aggregation of amyloid-beta (A\u03b2) and the micro-tubular binding protein tau. Here we show how we extended this model to include the main processes involved in passive and active immunisation against A\u03b2 and then demonstrate the effects of this intervention on soluble A\u03b2, plaques, phosphorylated tau and tangles. The model predicts that immunisation leads to clearance of plaques but only results in small reductions in levels of soluble A\u03b2, phosphorylated tau and tangles. The behaviour of this model is supported by neuropathological observations in Alzheimer patients immunised against A\u03b2. Since, soluble A\u03b2, phosphorylated tau and tangles more closely correlate with cognitive decline than plaques, our model suggests that immunotherapy against A\u03b2 may not be effective unless it is performed very early in the disease process or combined with other therapies.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
Nair AG, Gutierrez-Arenas O, Eriksson O, Vincent P, Hellgren Kotaleski J.
J. Neurosci. 2015 Oct; 35(41): 14017-14030
Abstract:
Transient changes in striatal dopamine (DA) concentration are considered to encode a reward prediction error (RPE) in reinforcement learning tasks. Often, a phasic DA change occurs concomitantly with a dip in striatal acetylcholine (ACh), whereas other neuromodulators, such as adenosine (Adn), change slowly. There are abundant adenylyl cyclase (AC) coupled GPCRs for these neuromodulators in striatal medium spiny neurons (MSNs), which play important roles in plasticity. However, little is known about the interaction between these neuromodulators via GPCRs. The interaction between these transient neuromodulator changes and the effect on cAMP/PKA signaling via Golf- and Gi/o-coupled GPCR are studied here using quantitative kinetic modeling. The simulations suggest that, under basal conditions, cAMP/PKA signaling could be significantly inhibited in D1R+ MSNs via ACh/M4R/Gi/o and an ACh dip is required to gate a subset of D1R/Golf-dependent PKA activation. Furthermore, the interaction between ACh dip and DA peak, via D1R and M4R, is synergistic. In a similar fashion, PKA signaling in D2+ MSNs is under basal inhibition via D2R/Gi/o and a DA dip leads to a PKA increase by disinhibiting A2aR/Golf, but D2+ MSNs could also respond to the DA peak via other intracellular pathways. This study highlights the similarity between the two types of MSNs in terms of high basal AC inhibition by Gi/o and the importance of interactions between Gi/o and Golf signaling, but at the same time predicts differences between them with regard to the sign of RPE responsible for PKA activation.Dopamine transients are considered to carry reward-related signal in reinforcement learning. An increase in dopamine concentration is associated with an unexpected reward or salient stimuli, whereas a decrease is produced by omission of an expected reward. Often dopamine transients are accompanied by other neuromodulatory signals, such as acetylcholine and adenosine. We highlight the importance of interaction between acetylcholine, dopamine, and adenosine signals via adenylyl-cyclase coupled GPCRs in shaping the dopamine-dependent cAMP/PKA signaling in striatal neurons. Specifically, a dopamine peak and an acetylcholine dip must interact, via D1 and M4 receptor, and a dopamine dip must interact with adenosine tone, via D2 and A2a receptor, in direct and indirect pathway neurons, respectively, to have any significant downstream PKA activation.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
Nair AG, Gutierrez-Arenas O, Eriksson O, Vincent P, Hellgren Kotaleski J.
J. Neurosci. 2015 Oct; 35(41): 14017-14030
Abstract:
Transient changes in striatal dopamine (DA) concentration are considered to encode a reward prediction error (RPE) in reinforcement learning tasks. Often, a phasic DA change occurs concomitantly with a dip in striatal acetylcholine (ACh), whereas other neuromodulators, such as adenosine (Adn), change slowly. There are abundant adenylyl cyclase (AC) coupled GPCRs for these neuromodulators in striatal medium spiny neurons (MSNs), which play important roles in plasticity. However, little is known about the interaction between these neuromodulators via GPCRs. The interaction between these transient neuromodulator changes and the effect on cAMP/PKA signaling via Golf- and Gi/o-coupled GPCR are studied here using quantitative kinetic modeling. The simulations suggest that, under basal conditions, cAMP/PKA signaling could be significantly inhibited in D1R+ MSNs via ACh/M4R/Gi/o and an ACh dip is required to gate a subset of D1R/Golf-dependent PKA activation. Furthermore, the interaction between ACh dip and DA peak, via D1R and M4R, is synergistic. In a similar fashion, PKA signaling in D2+ MSNs is under basal inhibition via D2R/Gi/o and a DA dip leads to a PKA increase by disinhibiting A2aR/Golf, but D2+ MSNs could also respond to the DA peak via other intracellular pathways. This study highlights the similarity between the two types of MSNs in terms of high basal AC inhibition by Gi/o and the importance of interactions between Gi/o and Golf signaling, but at the same time predicts differences between them with regard to the sign of RPE responsible for PKA activation.Dopamine transients are considered to carry reward-related signal in reinforcement learning. An increase in dopamine concentration is associated with an unexpected reward or salient stimuli, whereas a decrease is produced by omission of an expected reward. Often dopamine transients are accompanied by other neuromodulatory signals, such as acetylcholine and adenosine. We highlight the importance of interaction between acetylcholine, dopamine, and adenosine signals via adenylyl-cyclase coupled GPCRs in shaping the dopamine-dependent cAMP/PKA signaling in striatal neurons. Specifically, a dopamine peak and an acetylcholine dip must interact, via D1 and M4 receptor, and a dopamine dip must interact with adenosine tone, via D2 and A2a receptor, in direct and indirect pathway neurons, respectively, to have any significant downstream PKA activation.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
Bush A, Vasen G, Constantinou A, Dunayevich P, Patop IL, Blaustein M, Colman-Lerner A.
Mol. Syst. Biol. 2016 Dec; 12(12): 898
Abstract:
According to receptor theory, the effect of a ligand depends on the amount of agonist-receptor complex. Therefore, changes in receptor abundance should have quantitative effects. However, the response to pheromone in Saccharomyces cerevisiae is robust (unaltered) to increases or reductions in the abundance of the G-protein-coupled receptor (GPCR), Ste2, responding instead to the fraction of occupied receptor. We found experimentally that this robustness originates during G-protein activation. We developed a complete mathematical model of this step, which suggested the ability to compute fractional occupancy depends on the physical interaction between the inhibitory regulator of G-protein signaling (RGS), Sst2, and the receptor. Accordingly, replacing Sst2 by the heterologous hsRGS4, incapable of interacting with the receptor, abolished robustness. Conversely, forcing hsRGS4:Ste2 interaction restored robustness. Taken together with other results of our work, we conclude that this GPCR pathway computes fractional occupancy because ligand-bound GPCR-RGS complexes stimulate signaling while unoccupied complexes actively inhibit it. In eukaryotes, many RGSs bind to specific GPCRs, suggesting these complexes with opposing activities also detect fraction occupancy by a ratiometric measurement. Such complexes operate as push-pull devices, which we have recently described.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
Bush A, Vasen G, Constantinou A, Dunayevich P, Patop IL, Blaustein M, Colman-Lerner A.
Mol. Syst. Biol. 2016 Dec; 12(12): 898
Abstract:
According to receptor theory, the effect of a ligand depends on the amount of agonist-receptor complex. Therefore, changes in receptor abundance should have quantitative effects. However, the response to pheromone in Saccharomyces cerevisiae is robust (unaltered) to increases or reductions in the abundance of the G-protein-coupled receptor (GPCR), Ste2, responding instead to the fraction of occupied receptor. We found experimentally that this robustness originates during G-protein activation. We developed a complete mathematical model of this step, which suggested the ability to compute fractional occupancy depends on the physical interaction between the inhibitory regulator of G-protein signaling (RGS), Sst2, and the receptor. Accordingly, replacing Sst2 by the heterologous hsRGS4, incapable of interacting with the receptor, abolished robustness. Conversely, forcing hsRGS4:Ste2 interaction restored robustness. Taken together with other results of our work, we conclude that this GPCR pathway computes fractional occupancy because ligand-bound GPCR-RGS complexes stimulate signaling while unoccupied complexes actively inhibit it. In eukaryotes, many RGSs bind to specific GPCRs, suggesting these complexes with opposing activities also detect fraction occupancy by a ratiometric measurement. Such complexes operate as push-pull devices, which we have recently described.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
Thiaville2016 - Wild type folate pathwaymodel with proposed PanB reaction
This is a wild type E. coli model, andis one amongst the three models described in the paper. The othertwo models are\u00a0MODEL1602280002 (wild type with PanB overexpression) and MODEL1602280003 (wild type with PanB overexpression and THF regulation).\u00a0
Thiaville JJ, Frelin O, Garc\u00eda-Salinas C, Harrison K, Hasnain G, Horenstein NA, D\u00edaz de la Garza RI, Henry CS, Hanson AD, de Cr\u00e9cy-Lagard V.
Front Microbiol 2016; 7: 431
Abstract:
Tetrahydrofolate (THF) and its one-carbon derivatives, collectively termed folates, are essential cofactors, but are inherently unstable. While it is clear that chemical oxidation can cleave folates or damage their pterin precursors, very little is known about enzymatic damage to these molecules or about whether the folate biosynthesis pathway responds adaptively to damage to its end-products. The presence of a duplication of the gene encoding the folate biosynthesis enzyme 6-hydroxymethyl-7,8-dihydropterin pyrophosphokinase (FolK) in many sequenced bacterial genomes combined with a strong chromosomal clustering of the folK gene with panB, encoding the 5,10-methylene-THF-dependent enzyme ketopantoate hydroxymethyltransferase, led us to infer that PanB has a side activity that cleaves 5,10-methylene-THF, yielding a pterin product that is recycled by FolK. Genetic and metabolic analyses of Escherichia coli strains showed that overexpression of PanB leads to accumulation of the likely folate cleavage product 6-hydroxymethylpterin and other pterins in cells and medium, and-unexpectedly-to a 46% increase in total folate content. In silico modeling of the folate biosynthesis pathway showed that these observations are consistent with the in vivo cleavage of 5,10-methylene-THF by a side-activity of PanB, with FolK-mediated recycling of the pterin cleavage product, and with regulation of folate biosynthesis by folates or their damage products.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
DallePezze2016 - Activation of AMPK and mTORby amino acids (Model 3)
This model is as\u00a0described in the Supplementary Software 3 of the reference publication: SBML model similar to Model S2, but including a more complex p70-S6K module.
Dalle Pezze P, Ruf S, Sonntag AG, Langelaar-Makkinje M, Hall P, Heberle AM, Razquin Navas P, van Eunen K, T\u00f6lle RC, Schwarz JJ, Wiese H, Warscheid B, Deitersen J, Stork B, F\u00e4\u00dfler E, Sch\u00e4uble S, Hahn U, Horvatovich P, Shanley DP, Thedieck K.
Nat Commun 2016 Nov; 7: 13254
Abstract:
Amino acids (aa) are not only building blocks for proteins, but also signalling molecules, with the mammalian target of rapamycin complex 1 (mTORC1) acting as a key mediator. However, little is known about whether aa, independently of mTORC1, activate other kinases of the mTOR signalling network. To delineate aa-stimulated mTOR network dynamics, we here combine a computational-experimental approach with text mining-enhanced quantitative proteomics. We report that AMP-activated protein kinase (AMPK), phosphatidylinositide 3-kinase (PI3K) and mTOR complex 2 (mTORC2) are acutely activated by aa-readdition in an mTORC1-independent manner. AMPK activation by aa is mediated by Ca2+/calmodulin-dependent protein kinase kinase ? (CaMKK?). In response, AMPK impinges on the autophagy regulators Unc-51-like kinase-1 (ULK1) and c-Jun. AMPK is widely recognized as an mTORC1 antagonist that is activated by starvation. We find that aa acutely activate AMPK concurrently with mTOR. We show that AMPK under aa sufficiency acts to sustain autophagy. This may be required to maintain protein homoeostasis and deliver metabolite intermediates for biosynthetic processes.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
Jaiswal H, Benada J, M\u00fcllers E, Akopyan K, Burdova K, Koolmeister T, Helleday T, Medema RH, Macurek L, Lindqvist A.
EMBO J. 2017 Jul; 36(14): 2161-2176
Abstract:
After DNA damage, the cell cycle is arrested to avoid propagation of mutations. Arrest in G2 phase is initiated by ATM-/ATR-dependent signaling that inhibits mitosis-promoting kinases such as Plk1. At the same time, Plk1 can counteract ATR-dependent signaling and is required for eventual resumption of the cell cycle. However, what determines when Plk1 activity can resume remains unclear. Here, we use FRET-based reporters to show that a global spread of ATM activity on chromatin and phosphorylation of ATM targets including KAP1 control Plk1 re-activation. These phosphorylations are rapidly counteracted by the chromatin-bound phosphatase Wip1, allowing cell cycle restart despite persistent ATM activity present at DNA lesions. Combining experimental data and mathematical modeling, we propose a model for how the minimal duration of cell cycle arrest is controlled. Our model shows how cell cycle restart can occur before completion of DNA repair and suggests a mechanism for checkpoint adaptation in human cells.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
Mufudza2012 - Estrogen effect on the dynamicsof breast cancer
This deterministic model shows thedynamics of breast cancer with immune response. The effects ofestrogen are incorporated to study its effects as a risk factor forthe disease.\u00a0
Worldwide, breast cancer has become the second most common cancer in women. The disease has currently been named the most deadly cancer in women but little is known on what causes the disease. We present the effects of estrogen as a risk factor on the dynamics of breast cancer. We develop a deterministic mathematical model showing general dynamics of breast cancer with immune response. This is a four-population model that includes tumor cells, host cells, immune cells, and estrogen. The effects of estrogen are then incorporated in the model. The results show that the presence of extra estrogen increases the risk of developing breast cancer.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
Musante V, Li L, Kanyo J, Lam TT, Colangelo CM, Cheng SK, Brody AH, Greengard P, Le Nov\u00e8re N, Nairn AC.
Elife 2017 Jun; 6:
Abstract:
ARPP-16, ARPP-19, and ENSA are inhibitors of protein phosphatase PP2A. ARPP-19 and ENSA phosphorylated by Greatwall kinase inhibit PP2A during mitosis. ARPP-16 is expressed in striatal neurons where basal phosphorylation by MAST3 kinase inhibits PP2A and regulates key components of striatal signaling. The ARPP-16/19 proteins were discovered as substrates for PKA, but the function of PKA phosphorylation is unknown. We find that phosphorylation by PKA or MAST3 mutually suppresses the ability of the other kinase to act on ARPP-16. Phosphorylation by PKA also acts to prevent inhibition of PP2A by ARPP-16 phosphorylated by MAST3. Moreover, PKA phosphorylates MAST3 at multiple sites resulting in its inhibition. Mathematical modeling highlights the role of these three regulatory interactions to create a switch-like response to cAMP. Together, the results suggest a complex antagonistic interplay between the control of ARPP-16 by MAST3 and PKA that creates a mechanism whereby cAMP mediates PP2A disinhibition.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
Musante V, Li L, Kanyo J, Lam TT, Colangelo CM, Cheng SK, Brody AH, Greengard P, Le Nov\u00e8re N, Nairn AC.
Elife 2017 Jun; 6:
Abstract:
ARPP-16, ARPP-19, and ENSA are inhibitors of protein phosphatase PP2A. ARPP-19 and ENSA phosphorylated by Greatwall kinase inhibit PP2A during mitosis. ARPP-16 is expressed in striatal neurons where basal phosphorylation by MAST3 kinase inhibits PP2A and regulates key components of striatal signaling. The ARPP-16/19 proteins were discovered as substrates for PKA, but the function of PKA phosphorylation is unknown. We find that phosphorylation by PKA or MAST3 mutually suppresses the ability of the other kinase to act on ARPP-16. Phosphorylation by PKA also acts to prevent inhibition of PP2A by ARPP-16 phosphorylated by MAST3. Moreover, PKA phosphorylates MAST3 at multiple sites resulting in its inhibition. Mathematical modeling highlights the role of these three regulatory interactions to create a switch-like response to cAMP. Together, the results suggest a complex antagonistic interplay between the control of ARPP-16 by MAST3 and PKA that creates a mechanism whereby cAMP mediates PP2A disinhibition.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
Musante V, Li L, Kanyo J, Lam TT, Colangelo CM, Cheng SK, Brody AH, Greengard P, Le Nov\u00e8re N, Nairn AC.
Elife 2017 Jun; 6:
Abstract:
ARPP-16, ARPP-19, and ENSA are inhibitors of protein phosphatase PP2A. ARPP-19 and ENSA phosphorylated by Greatwall kinase inhibit PP2A during mitosis. ARPP-16 is expressed in striatal neurons where basal phosphorylation by MAST3 kinase inhibits PP2A and regulates key components of striatal signaling. The ARPP-16/19 proteins were discovered as substrates for PKA, but the function of PKA phosphorylation is unknown. We find that phosphorylation by PKA or MAST3 mutually suppresses the ability of the other kinase to act on ARPP-16. Phosphorylation by PKA also acts to prevent inhibition of PP2A by ARPP-16 phosphorylated by MAST3. Moreover, PKA phosphorylates MAST3 at multiple sites resulting in its inhibition. Mathematical modeling highlights the role of these three regulatory interactions to create a switch-like response to cAMP. Together, the results suggest a complex antagonistic interplay between the control of ARPP-16 by MAST3 and PKA that creates a mechanism whereby cAMP mediates PP2A disinhibition.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
Barr AR, Heldt FS, Zhang T, Bakal C, Nov\u00e1k B.
Cell Syst 2016 Jan; 2(1): 27-37
Abstract:
The transition from G1 into DNA replication (S phase) is an emergent behavior resulting from dynamic and complex interactions between cyclin-dependent kinases (Cdks), Cdk inhibitors (CKIs), and the anaphase-promoting complex/cyclosome (APC/C). Understanding the cellular decision to commit to S\u00a0phase requires a quantitative description of these interactions. We apply quantitative imaging of single human cells to track the expression of G1/S regulators and use these data to parametrize a stochastic mathematical model of the G1/S transition. We show that a rapid, proteolytic, double-negative feedback loop between Cdk2:Cyclin and the Cdk inhibitor p27(Kip1) drives a switch-like entry into S phase. Furthermore, our model predicts that increasing Emi1 levels throughout S phase are critical in maintaining irreversibility of the G1/S transition, which we validate using Emi1 knockdown and live imaging of G1/S reporters. This work provides insight into the general design principles of the signaling networks governing the temporally abrupt transitions between cell-cycle phases.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
Kwang-Hyun Cho, Sung-Young Shin, Hyun-Woo Kim, Olaf Wolkenhauer, Brian McFerran and Walter Kolch
Computational Methods in Systems Biology: First International Workshop, CMSB 2003 Rovereto, Italy, February 24\u00e2??26, 2003 Proceedings
Abstract:
This paper investigates the influence of the Raf Kinase Inhibitor Pro- tein (RKIP) on the Extracellular signal Regulated Kinase (ERK) signaling pathway through mathematical modeling and simulation. Using nonlinear ordi- nary differential equations to represent biochemical reactions in the pathway, we suggest a technique for parameter estimation, utilizing time series data of proteins involved in the signaling pathway. The mathematical model allows the simulation the sensitivity of the ERK pathway to variations of initial RKIP and ERK-PP (phosphorylated ERK) concentrations along with time. Throughout the simulation study, we can qualitatively validate the proposed mathematical model compared with experimental results.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
Padala RR, Karnawat R, Viswanathan SB, Thakkar AV, Das AB.
Mol Biosyst 2017 May; 13(5): 830-840
Abstract:
Perturbations in molecular signaling pathways are a result of genetic or epigenetic alterations, which may lead to malignant transformation of cells. Despite cellular robustness, specific genetic or epigenetic changes of any gene can trigger a cascade of failures, which result in the malfunctioning of cell signaling pathways and lead to cancer phenotypes. The extent of cellular robustness has a link with the architecture of the network such as feedback and feedforward loops. Perturbation in components within feedback loops causes a transition from a regulated to a persistently activated state and results in uncontrolled cell growth. This work represents the mathematical and quantitative modeling of ERK, PI3K/Akt, and Wnt/?-catenin signaling crosstalk to show the dynamics of signaling responses during genetic and epigenetic changes in cancer. ERK, PI3K/Akt, and Wnt/?-catenin signaling crosstalk networks include both intra and inter-pathway feedback loops which function in a controlled fashion in a healthy cell. Our results show that cancerous perturbations of components such as EGFR, Ras, B-Raf, PTEN, and components of the destruction complex cause extreme fragility in the network and constitutively activate inter-pathway positive feedback loops. We observed that the aberrant signaling response due to the failure of specific network components is transmitted throughout the network via crosstalk, generating an additive effect on cancer growth and proliferation.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
Even in the early stages of their development, tumours are not simply a homogeneous grouping of mutant cells; rather, they develop in tandem with normal tissue cells, and also recruit other cell types including lymphatic cells and the endothelial cells required for the development of a blood supply. It has been repeatedly seen that macrophages form a significant proportion of the tumour mass, and that they can have a variety of effects upon the tumour, leading to a delicate balance between growth promotion and inhibition. This paper develops a model for the early, avascular growth of a tumour, concentrating on the inhibitory effect of macrophages due to their cytolytic activity. It is shown that such an immune response is not sufficient to prevent growth, due to it being a second-order process with respect to the density of the tumour cells present. However, the presence of macrophages does have important effects on the tumour composition, and the authors perform a detailed bifurcation analysis of their model to clarify this. An extended model is also considered which incorporates addition of exogenous chemical regulators. In this case, the model admits the possibility of tumour regression, and the therapeutic implications of this are discussed.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
The notion of feedback is fundamental for understanding signal transduction networks. Feedback loops attenuate or amplify signals, change the network dynamics and modify the input-output relationships between the signal and the target. Negative feedback provides robustness to noise and adaptation to perturbations, but as a double-edged sword can prevent effective pathway inhibition by a drug. Positive feedback brings about switch-like network responses and can convert analog input signals into digital outputs, triggering cell fate decisions and phenotypic changes. We show how a multitude of protein-protein interactions creates hidden feedback loops in signal transduction cascades. Drug treatments that interfere with feedback regulation can cause unexpected adverse effects. Combinatorial molecular interactions generated by pathway crosstalk and feedback loops often bypass the block caused by targeted therapies against oncogenic mutated kinases. We discuss mechanisms of drug resistance caused by network adaptations and suggest that development of effective drug combinations requires understanding of how feedback loops modulate drug responses.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
Padala RR, Karnawat R, Viswanathan SB, Thakkar AV, Das AB.
Mol Biosyst 2017 May; 13(5): 830-840
Abstract:
Perturbations in molecular signaling pathways are a result of genetic or epigenetic alterations, which may lead to malignant transformation of cells. Despite cellular robustness, specific genetic or epigenetic changes of any gene can trigger a cascade of failures, which result in the malfunctioning of cell signaling pathways and lead to cancer phenotypes. The extent of cellular robustness has a link with the architecture of the network such as feedback and feedforward loops. Perturbation in components within feedback loops causes a transition from a regulated to a persistently activated state and results in uncontrolled cell growth. This work represents the mathematical and quantitative modeling of ERK, PI3K/Akt, and Wnt/?-catenin signaling crosstalk to show the dynamics of signaling responses during genetic and epigenetic changes in cancer. ERK, PI3K/Akt, and Wnt/?-catenin signaling crosstalk networks include both intra and inter-pathway feedback loops which function in a controlled fashion in a healthy cell. Our results show that cancerous perturbations of components such as EGFR, Ras, B-Raf, PTEN, and components of the destruction complex cause extreme fragility in the network and constitutively activate inter-pathway positive feedback loops. We observed that the aberrant signaling response due to the failure of specific network components is transmitted throughout the network via crosstalk, generating an additive effect on cancer growth and proliferation.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
Padala RR, Karnawat R, Viswanathan SB, Thakkar AV, Das AB.
Mol Biosyst 2017 May; 13(5): 830-840
Abstract:
Perturbations in molecular signaling pathways are a result of genetic or epigenetic alterations, which may lead to malignant transformation of cells. Despite cellular robustness, specific genetic or epigenetic changes of any gene can trigger a cascade of failures, which result in the malfunctioning of cell signaling pathways and lead to cancer phenotypes. The extent of cellular robustness has a link with the architecture of the network such as feedback and feedforward loops. Perturbation in components within feedback loops causes a transition from a regulated to a persistently activated state and results in uncontrolled cell growth. This work represents the mathematical and quantitative modeling of ERK, PI3K/Akt, and Wnt/?-catenin signaling crosstalk to show the dynamics of signaling responses during genetic and epigenetic changes in cancer. ERK, PI3K/Akt, and Wnt/?-catenin signaling crosstalk networks include both intra and inter-pathway feedback loops which function in a controlled fashion in a healthy cell. Our results show that cancerous perturbations of components such as EGFR, Ras, B-Raf, PTEN, and components of the destruction complex cause extreme fragility in the network and constitutively activate inter-pathway positive feedback loops. We observed that the aberrant signaling response due to the failure of specific network components is transmitted throughout the network via crosstalk, generating an additive effect on cancer growth and proliferation.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
Padala RR, Karnawat R, Viswanathan SB, Thakkar AV, Das AB.
Mol Biosyst 2017 May; 13(5): 830-840
Abstract:
Perturbations in molecular signaling pathways are a result of genetic or epigenetic alterations, which may lead to malignant transformation of cells. Despite cellular robustness, specific genetic or epigenetic changes of any gene can trigger a cascade of failures, which result in the malfunctioning of cell signaling pathways and lead to cancer phenotypes. The extent of cellular robustness has a link with the architecture of the network such as feedback and feedforward loops. Perturbation in components within feedback loops causes a transition from a regulated to a persistently activated state and results in uncontrolled cell growth. This work represents the mathematical and quantitative modeling of ERK, PI3K/Akt, and Wnt/?-catenin signaling crosstalk to show the dynamics of signaling responses during genetic and epigenetic changes in cancer. ERK, PI3K/Akt, and Wnt/?-catenin signaling crosstalk networks include both intra and inter-pathway feedback loops which function in a controlled fashion in a healthy cell. Our results show that cancerous perturbations of components such as EGFR, Ras, B-Raf, PTEN, and components of the destruction complex cause extreme fragility in the network and constitutively activate inter-pathway positive feedback loops. We observed that the aberrant signaling response due to the failure of specific network components is transmitted throughout the network via crosstalk, generating an additive effect on cancer growth and proliferation.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
Padala RR, Karnawat R, Viswanathan SB, Thakkar AV, Das AB.
Mol Biosyst 2017 May; 13(5): 830-840
Abstract:
Perturbations in molecular signaling pathways are a result of genetic or epigenetic alterations, which may lead to malignant transformation of cells. Despite cellular robustness, specific genetic or epigenetic changes of any gene can trigger a cascade of failures, which result in the malfunctioning of cell signaling pathways and lead to cancer phenotypes. The extent of cellular robustness has a link with the architecture of the network such as feedback and feedforward loops. Perturbation in components within feedback loops causes a transition from a regulated to a persistently activated state and results in uncontrolled cell growth. This work represents the mathematical and quantitative modeling of ERK, PI3K/Akt, and Wnt/?-catenin signaling crosstalk to show the dynamics of signaling responses during genetic and epigenetic changes in cancer. ERK, PI3K/Akt, and Wnt/?-catenin signaling crosstalk networks include both intra and inter-pathway feedback loops which function in a controlled fashion in a healthy cell. Our results show that cancerous perturbations of components such as EGFR, Ras, B-Raf, PTEN, and components of the destruction complex cause extreme fragility in the network and constitutively activate inter-pathway positive feedback loops. We observed that the aberrant signaling response due to the failure of specific network components is transmitted throughout the network via crosstalk, generating an additive effect on cancer growth and proliferation.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
Padala RR, Karnawat R, Viswanathan SB, Thakkar AV, Das AB.
Mol Biosyst 2017 May; 13(5): 830-840
Abstract:
Perturbations in molecular signaling pathways are a result of genetic or epigenetic alterations, which may lead to malignant transformation of cells. Despite cellular robustness, specific genetic or epigenetic changes of any gene can trigger a cascade of failures, which result in the malfunctioning of cell signaling pathways and lead to cancer phenotypes. The extent of cellular robustness has a link with the architecture of the network such as feedback and feedforward loops. Perturbation in components within feedback loops causes a transition from a regulated to a persistently activated state and results in uncontrolled cell growth. This work represents the mathematical and quantitative modeling of ERK, PI3K/Akt, and Wnt/?-catenin signaling crosstalk to show the dynamics of signaling responses during genetic and epigenetic changes in cancer. ERK, PI3K/Akt, and Wnt/?-catenin signaling crosstalk networks include both intra and inter-pathway feedback loops which function in a controlled fashion in a healthy cell. Our results show that cancerous perturbations of components such as EGFR, Ras, B-Raf, PTEN, and components of the destruction complex cause extreme fragility in the network and constitutively activate inter-pathway positive feedback loops. We observed that the aberrant signaling response due to the failure of specific network components is transmitted throughout the network via crosstalk, generating an additive effect on cancer growth and proliferation.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
Cell division is characterized by a sequence of events by which a cell gives rise to two daughter cells. Quantitative measurements of cell-cycle dynamics in single cells showed that despite variability in G1-, S-, and G2 phases, duration of mitosis is short and remarkably constant. Surprisingly, there is no correlation between cell-cycle length and mitotic duration, suggesting that mitosis is temporally insulated from variability in earlier cell-cycle phases. By combining live cell imaging and computational modeling, we showed that positive feedback is the molecular mechanism underlying the temporal insulation of mitosis. Perturbing positive feedback gave rise to a sluggish, variable entry and progression through mitosis and uncoupled duration of mitosis from variability in cell cycle length. We show that positive feedback is important to keep mitosis short, constant, and temporally insulated and anticipate it might be a commonly used regulatory strategy to create modularity in other biological systems.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
Lee E, Salic A, Kr\u00fcger R, Heinrich R, Kirschner MW.
PLoS Biol. 2003 Oct; 1(1): E10
Abstract:
Wnt signaling plays an important role in both oncogenesis and development. Activation of the Wnt pathway results in stabilization of the transcriptional coactivator beta-catenin. Recent studies have demonstrated that axin, which coordinates beta-catenin degradation, is itself degraded. Although the key molecules required for transducing a Wnt signal have been identified, a quantitative understanding of this pathway has been lacking. We have developed a mathematical model for the canonical Wnt pathway that describes the interactions among the core components: Wnt, Frizzled, Dishevelled, GSK3beta, APC, axin, beta-catenin, and TCF. Using a system of differential equations, the model incorporates the kinetics of protein-protein interactions, protein synthesis/degradation, and phosphorylation/dephosphorylation. We initially defined a reference state of kinetic, thermodynamic, and flux data from experiments using Xenopus extracts. Predictions based on the analysis of the reference state were used iteratively to develop a more refined model from which we analyzed the effects of prolonged and transient Wnt stimulation on beta-catenin and axin turnover. We predict several unusual features of the Wnt pathway, some of which we tested experimentally. An insight from our model, which we confirmed experimentally, is that the two scaffold proteins axin and APC promote the formation of degradation complexes in very different ways. We can also explain the importance of axin degradation in amplifying and sharpening the Wnt signal, and we show that the dependence of axin degradation on APC is an essential part of an unappreciated regulatory loop that prevents the accumulation of beta-catenin at decreased APC concentrations. By applying control analysis to our mathematical model, we demonstrate the modular design, sensitivity, and robustness of the Wnt pathway and derive an explicit expression for tumor suppression and oncogenicity.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
The skin is largely comprised of keratinocytes within the interfollicular epidermis. Over approximately two weeks these cells differentiate and traverse the thickness of the skin. The stage of differentiation is therefore reflected in the positions of cells within the tissue, providing a convenient axis along which to study the signaling events that occur in situ during keratinocyte terminal differentiation, over this extended two-week timescale. The canonical ERK-MAPK signaling cascade (Raf-1, MEK-1/2 and ERK-1/2) has been implicated in controlling diverse cellular behaviors, including proliferation and differentiation. While the molecular interactions involved in signal transduction through this cascade have been well characterized in cell culture experiments, our understanding of how this sequence of events unfolds to determine cell fate within a homeostatic tissue environment has not been fully characterized.We measured the abundance of total and phosphorylated ERK-MAPK signaling proteins within interfollicular keratinocytes in transverse cross-sections of human epidermis using immunofluorescence microscopy. To investigate these data we developed a mathematical model of the signaling cascade using a normalized-Hill differential equation formalism.These data show coordinated variation in the abundance of phosphorylated ERK-MAPK components across the epidermis. Statistical analysis of these data shows that associations between phosphorylated ERK-MAPK components which correspond to canonical molecular interactions are dependent upon spatial position within the epidermis. The model demonstrates that the spatial profile of activation for ERK-MAPK signaling components across the epidermis may be maintained in a cell-autonomous fashion by an underlying spatial gradient in calcium signaling.Our data demonstrate an extended phospho-protein profile of ERK-MAPK signaling cascade components across the epidermis in situ, and statistical associations in these data indicate canonical ERK-MAPK interactions underlie this spatial profile of ERK-MAPK activation. Using mathematical modelling we have demonstrated that spatially varying calcium signaling components across the epidermis may be sufficient to maintain the spatial profile of ERK-MAPK signaling cascade components in a cell-autonomous manner. These findings may have significant implications for the wide range of cancer drugs which therapeutically target ERK-MAPK signaling components.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
This deteministic model reveals that abistable switch created by Cdt2, promotes irreversible S-phaseentry by keeping p21 levels low, prevents premature S-phase exitupon DNA damage
Barr AR, Cooper S, Heldt FS, Butera F, Stoy H, Mansfeld J, Nov\u00e1k B, Bakal C.
Nat Commun 2017 Mar; 8: 14728
Abstract:
Following DNA damage caused by exogenous sources, such as ionizing radiation, the tumour suppressor p53 mediates cell cycle arrest via expression of the CDK inhibitor, p21. However, the role of p21 in maintaining genomic stability in the absence of exogenous DNA-damaging agents is unclear. Here, using live single-cell measurements of p21 protein in proliferating cultures, we show that naturally occurring DNA damage incurred over S-phase causes p53-dependent accumulation of p21 during mother G2- and daughter G1-phases. High p21 levels mediate G1 arrest via CDK inhibition, yet lower levels have no impact on G1 progression, and the ubiquitin ligases CRL4Cdt2 and SCFSkp2 couple to degrade p21 prior to the G1/S transition. Mathematical modelling reveals that a bistable switch, created by CRL4Cdt2, promotes irreversible S-phase entry by keeping p21 levels low, preventing premature S-phase exit upon DNA damage. Thus, we characterize how p21 regulates the proliferation-quiescence decision to maintain genomic stability.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
This deterministic model ofimmunological surveillance involving tumour cell\u2013T-lymphocyteinteraction, cell surface expression of Fas/FasL, and theirsecreted soluble forms.
One proposed mechanism of tumour escape from immune surveillance is tumour up-regulation of the cell surface ligand FasL, which can lead to apoptosis of Fas receptor (Fas) positive lymphocytes. Based upon this 'counterattack', we have developed a mathematical model involving tumour cell-lymphocyte interaction, cell surface expression of Fas/FasL, and their secreted soluble forms. The model predicts that (a) the production of soluble forms of Fas and FasL will lead to the down-regulation of the immune response; (b) matrix metalloproteinase (MMP) inactivation should lead to increased membrane FasL and result in a higher rate of Fas-mediated apoptosis for lymphocytes than for tumour cells. Recent studies on cancer patients lend support for these predictions. The clinical implications are two-fold. Firstly, the use of broad spectrum MMP inhibitors as anti-angiogenic agents may be compromised by their adverse effect on tumour FasL up-regulation. Also, Fas/FasL interactions may have an impact on the outcome of numerous ongoing immunotherapeutic trials since the final common pathway of all these approaches is the transduction of death signals within the tumour cell.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
In this paper, we propose and analyse a mathematical model for chronic myelogenous leukemia (CML), a cancer of the blood. We model the interaction between naive T cells, effector T cells, and CML cancer cells in the body, using a system of ordinary differential equations which gives rates of change of the three cell populations. One of the difficulties in modeling CML is the scarcity of experimental data which can be used to estimate parameters values. To compensate for the resulting uncertainties, we use Latin hypercube sampling (LHS) on large ranges of possible parameter values in our analysis. A major goal of this work is the determination of parameters which play a critical role in remission or clearance of the cancer in the model. Our analysis examines 12 parameters, and identifies two of these, the growth and death rates of CML, as critical to the outcome of the system. Our results indicate that the most promising research avenues for treatments of CML should be those that affect these two significant parameters (CML growth and death rates), while altering the other parameters should have little effect on the outcome.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
Recent experimental data have shown that HIV-specific CD4 T cells provide a very important target for HIV replication. We use mathematical models to explore the effect of specific CD4 T cell infection on the dynamics of virus spread and immune responses. Infected CD4 T cells can provide antigen for their own stimulation. We show that such autocatalytic cell division can significantly enhance virus spread, and can also provide an additional reservoir for virus persistence during anti-viral drug therapy. In addition, the initial number of HIV-specific CD4 T cells is an important determinant of acute infection dynamics. A high initial number of HIV-specific CD4 T cells can lead to a sudden and fast drop of the population of HIV-specific CD4 T cells which results quickly in their extinction. On the other hand, a low initial number of HIV-specific CD4 T cells can lead to a prolonged persistence of HIV-specific CD4 T cell help at higher levels. The model suggests that boosting the population of HIV-specific CD4 T cells can increase the amount of virus-induced immune impairment, lead to less efficient anti-viral effector responses, and thus speed up disease progression, especially if effector responses such as CTL have not been sufficiently boosted at the same time.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
Activation of the fibroblast growth factor (FGFR) and melanocyte stimulating hormone (MC1R) receptors stimulates B-Raf and C-Raf isoforms that regulate the dynamics of MAPK1,2 signaling. Network topology motifs in mammalian cells include feed-forward and feedback loops and bifans where signals from two upstream molecules integrate to modulate the activity of two downstream molecules. We computationally modeled and experimentally tested signal processing in the FGFR/MC1R/B-Raf/C-Raf/MAPK1,2 network in human melanoma cells; identifying 7 regulatory loops and a bifan motif. Signaling from FGFR leads to sustained activation of MAPK1,2, whereas signaling from MC1R results in transient activation of MAPK1,2. The dynamics of MAPK activation depends critically on the expression level and connectivity to C-Raf, which is critical for a sustained MAPK1,2 response. A partially incoherent bifan motif with a feedback loop acts as a logic gate to integrate signals and regulate duration of activation of the MAPK signaling cascade. Further reducing a 106-node ordinary differential equations network encompassing the complete network to a 6-node network encompassing rate-limiting processes sustains the feedback loops and the bifan, providing sufficient information to predict biological responses.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
This a model from the article: Computational model for effects of ligand/receptor binding properties oninterleukin-2 trafficking dynamics and T cell proliferation response. Fallon EM, Lauffenburger DA. Biotechnol Prog 2000 Sep-Oct;16(5):905-16 11027188 , Abstract: Multisubunit cytokine receptors such as the heterotrimeric receptor forinterleukin-2 (IL-2) are ubiquitous in hematopoeitic cell types of importance inbiotechnology and are crucial regulators of cell proliferation anddifferentiation behavior. Dynamics of cytokine/receptor endocytic traffickingcan significantly impact cell responses through effects of receptordown-regulation and ligand depletion, and in turn are governed byligand/receptor binding properties. We describe here a computational model fortrafficking dynamics of the IL-2 receptor (IL-2R) system, which is able topredict T cell proliferation responses to IL-2. This model comprises kineticequations describing binding, internalization, and postendocytic sorting of IL-2and IL-2R, including an experimentally derived dependence of cell proliferationrate on these properties. Computational results from this model predict thatIL-2 depletion can be reduced by decreasing its binding affinity for the IL-2Rbetagamma subunit relative to the alpha subunit at endosomal pH, as a result ofenhanced ligand sorting to recycling vis-a-vis degradation, and that an IL-2analogue with such altered binding properties should exhibit increased potencyfor stimulating the T cell proliferation response. These results are inagreement with our recent experimental findings for the IL-2 analogue termed 2D1[Fallon, E. M. et al. J. Biol. Chem. 2000, 275, 6790-6797]. Thus, this type ofmodel may enable prediction of beneficial cytokine/receptor binding propertiesto aid development of molecular design criteria for improvements in applicationssuch as in vivo cytokine therapies and in vitro hematopoietic cell bioreactors.
This model was taken from the CellML repository and automatically converted to SBML. The original model was: Fallon EM, Lauffenburger DA. (2000) - version=1.0 The original CellML model was created by: Catherine Lloyd c.lloyd@auckland.ac.nz The University of Auckland
This model originates from BioModels Database: A Database of Annotated Published Models (http://www.ebi.ac.uk/biomodels/). It is copyright (c) 2005-2011 The BioModels.net Team. To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
In summary, you are entitled to use this encoded model in absolutely any manner you deem suitable, verbatim, or with modification, alone or embedded it in a larger context, redistribute it, commercially or not, in a restricted way or not..
Pappalardo F, Russo G, Candido S, Pennisi M, Cavalieri S, Motta S, McCubrey JA, Nicoletti F, Libra M.
PLoS ONE 2016; 11(3): e0152104
Abstract:
Malignant melanoma is an aggressive tumor of the skin and seems to be resistant to current therapeutic approaches. Melanocytic transformation is thought to occur by sequential accumulation of genetic and molecular alterations able to activate the Ras/Raf/MEK/ERK (MAPK) and/or the PI3K/AKT (AKT) signalling pathways. Specifically, mutations of B-RAF activate MAPK pathway resulting in cell cycle progression and apoptosis prevention. According to these findings, MAPK and AKT pathways may represent promising therapeutic targets for an otherwise devastating disease.Here we show a computational model able to simulate the main biochemical and metabolic interactions in the PI3K/AKT and MAPK pathways potentially involved in melanoma development. Overall, this computational approach may accelerate the drug discovery process and encourages the identification of novel pathway activators with consequent development of novel antioncogenic compounds to overcome tumor cell resistance to conventional therapeutic agents. The source code of the various versions of the model are available as S1 Archive.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
Oncogenesis results from changes in kinetics or in abundance of proteins in signal transduction networks. Recently, it was shown that control of signalling cannot reside in a single gene product, and might well be dispersed over many components. Which of the reactions in these complex networks are most important, and how can the existing molecular information be used to understand why particular genes are oncogenes whereas others are not? We implement a new method to help address such questions. We apply control analysis to a detailed kinetic model of the epidermal growth factor-induced mitogen-activated protein kinase network. We determine the control of each reaction with respect to three biologically relevant characteristics of the output of this network: the amplitude, duration and integrated output of the transient phosphorylation of extracellular signal-regulated kinase (ERK). We confirm that control is distributed, but far from randomly: a small proportion of reactions substantially control signalling. In particular, the activity of Raf is in control of all characteristics of the transient profile of ERK phosphorylation, which may clarify why Raf is an oncogene. Most reactions that really matter for one signalling characteristic are also important for the other characteristics. Our analysis also predicts the effects of mutations and changes in gene expression.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
Combination chemotherapy is standard treatment for pancreatic cancer. However, current drugs lack efficacy for most patients, and selection and evaluation of new combination regimens is empirical and time-consuming. The efficacy of gemcitabine, a standard-of-care agent, combined with birinapant, a pro-apoptotic antagonist of Inhibitor of Apoptosis Proteins (IAPs), was investigated in pancreatic cancer cells. PANC-1 cells were treated with vehicle, gemcitabine (6, 10, 20 nM), birinapant (50, 200, 500 nM), and combinations of the two drugs. Temporal changes in cell numbers, cell cycle distribution, and apoptosis were measured. A basic pharmacodynamic (PD) model based on cell numbers, and a mechanism-based PD model integrating all measurements, were developed. The basic PD model indicated that synergistic effects occurred in both cell proliferation and death processes. The mechanism-based model captured key features of drug action: temporary cell cycle arrest in S phase induced by gemcitabine alone, apoptosis induced by birinapant alone, and prolonged cell cycle arrest and enhanced apoptosis induced by the combination. A drug interaction term \u03a8 was employed in the models to signify interactions of the combination when data were limited. When more experimental information was utilized, \u03a8 values approaching 1 indicated that specific mechanisms of interactions were captured better. PD modeling identified the potential benefit of combining gemcitabine and birinapant, and characterized the key interaction pathways. An optimal treatment schedule of pretreatment with gemcitabine for 24-48 h was suggested based on model predictions and was verified experimentally. This approach provides a generalizable modeling platform for exploring combinations of cytostatic and cytotoxic agents in cancer cell culture studies.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
Zhu2015 - combined gemcitabine and birinapantin pancreatic cancer cells - mechanistic PD model
Mechanistic mathematical model toillustrate the effectiveness of combination chemotherapy involvinggemcitabine and birinapant against pancreatic cancer.
Combination chemotherapy is standard treatment for pancreatic cancer. However, current drugs lack efficacy for most patients, and selection and evaluation of new combination regimens is empirical and time-consuming. The efficacy of gemcitabine, a standard-of-care agent, combined with birinapant, a pro-apoptotic antagonist of Inhibitor of Apoptosis Proteins (IAPs), was investigated in pancreatic cancer cells. PANC-1 cells were treated with vehicle, gemcitabine (6, 10, 20 nM), birinapant (50, 200, 500 nM), and combinations of the two drugs. Temporal changes in cell numbers, cell cycle distribution, and apoptosis were measured. A basic pharmacodynamic (PD) model based on cell numbers, and a mechanism-based PD model integrating all measurements, were developed. The basic PD model indicated that synergistic effects occurred in both cell proliferation and death processes. The mechanism-based model captured key features of drug action: temporary cell cycle arrest in S phase induced by gemcitabine alone, apoptosis induced by birinapant alone, and prolonged cell cycle arrest and enhanced apoptosis induced by the combination. A drug interaction term \u03a8 was employed in the models to signify interactions of the combination when data were limited. When more experimental information was utilized, \u03a8 values approaching 1 indicated that specific mechanisms of interactions were captured better. PD modeling identified the potential benefit of combining gemcitabine and birinapant, and characterized the key interaction pathways. An optimal treatment schedule of pretreatment with gemcitabine for 24-48 h was suggested based on model predictions and was verified experimentally. This approach provides a generalizable modeling platform for exploring combinations of cytostatic and cytotoxic agents in cancer cell culture studies.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
Even in the early stages of their development, tumours are not simply a homogeneous grouping of mutant cells; rather, they develop in tandem with normal tissue cells, and also recruit other cell types including lymphatic cells and the endothelial cells required for the development of a blood supply. It has been repeatedly seen that macrophages form a significant proportion of the tumour mass, and that they can have a variety of effects upon the tumour, leading to a delicate balance between growth promotion and inhibition. This paper develops a model for the early, avascular growth of a tumour, concentrating on the inhibitory effect of macrophages due to their cytolytic activity. It is shown that such an immune response is not sufficient to prevent growth, due to it being a second-order process with respect to the density of the tumour cells present. However, the presence of macrophages does have important effects on the tumour composition, and the authors perform a detailed bifurcation analysis of their model to clarify this. An extended model is also considered which incorporates addition of exogenous chemical regulators. In this case, the model admits the possibility of tumour regression, and the therapeutic implications of this are discussed.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
While mathematical models are often used to predict progression of cancer and treatment outcomes, there is still uncertainty over how to best model tumor growth. Seven ordinary differential equation (ODE) models of tumor growth (exponential, Mendelsohn, logistic, linear, surface, Gompertz, and Bertalanffy) have been proposed, but there is no clear guidance on how to choose the most appropriate model for a particular cancer.We examined all seven of the previously proposed ODE models in the presence and absence of chemotherapy. We derived equations for the maximum tumor size, doubling time, and the minimum amount of chemotherapy needed to suppress the tumor and used a sample data set to compare how these quantities differ based on choice of growth model.We find that there is a 12-fold difference in predicting doubling times and a 6-fold difference in the predicted amount of chemotherapy needed for suppression depending on which growth model was used.Our results highlight the need for careful consideration of model assumptions when developing mathematical models for use in cancer treatment planning.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
Studies in animals and humans suggest that the diurnal pattern in plasma melatonin levels is due to the hormone's rates of synthesis, circulatory infusion and clearance, circadian control of synthesis onset and offset, environmental lighting conditions, and error in the melatonin immunoassay. A two-dimensional linear differential equation model of the hormone is formulated and is used to analyze plasma melatonin levels in 18 normal healthy male subjects during a constant routine. Recently developed Bayesian statistical procedures are used to incorporate correctly the magnitude of the immunoassay error into the analysis. The estimated parameters [median (range)] were clearance half-life of 23.67 (14.79-59.93) min, synthesis onset time of 2206 (1940-0029), synthesis offset time of 0621 (0246-0817), and maximum N-acetyltransferase activity of 7.17(2.34-17.93) pmol x l(-1) x min(-1). All were in good agreement with values from previous reports. The difference between synthesis offset time and the phase of the core temperature minimum was 1 h 15 min (-4 h 38 min-2 h 43 min). The correlation between synthesis onset and the dim light melatonin onset was 0.93. Our model provides a more physiologically plausible estimate of the melatonin synthesis onset time than that given by the dim light melatonin onset and the first reliable means of estimating the phase of synthesis offset. Our analysis shows that the circadian and pharmacokinetics parameters of melatonin can be reliably estimated from a single model.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
OBJECTIVE: Clinical trial simulation (CTS) was used to select a robust design to test the hypothesis that a new treatment was effective for Alzheimer's disease (AD). Typically, a parallel group, placebo controlled, 12-week trial in 200-400 AD patients would be used to establish drug effect relative to placebo (i.e., Ho: Drug Effect = 0). We evaluated if a crossover design would allow smaller and shorter duration trials. MATERIALS AND METHODS: A family of plausible drug and disease models describing the time course of the AD assessment scale (ADAS-Cog) was developed based on Phase I data and literature reports of other treatments for AD. The models included pharmacokinetic, pharmacodynamic, disease progression, and placebo components. Eight alternative trial designs were explored via simulation. One hundred replicates of each combination of drug and disease model and trial design were simulated. A 'positive trial' reflecting drug activity was declared considering both a dose trend test (p < 0.05) and pair-wise comparisons to placebo (p < 0.025). RESULTS: A 4 x 4 Latin Square design was predicted to have at least 80% power to detect activity across a range of drug and disease models. The trial design was subsequently implemented and the trial was completed. Based on the results of the actual trial, a conclusive decision about further development was taken. The crossover design provided enhanced power over a parallel group design due to the lower residual variability. CONCLUSION: CTS aided the decision to use a more efficient proof of concept trial design, leading to savings of up to US 4 M dollars in direct costs and a firm decision 8-12 months earlier than a 12-week parallel group trial.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
Reyes-Palomares2012 - a combined modelhepatic polyamine and sulfur aminoacid metabolism - version1
Mammalian polyamine metabolism consists of a bi-cycle with two required entrances, omithine and S-adenosyl methionine (SAM), and several alternative exists. The relevant regulatory roles of the short half-life enzymes ornithine decarboxylase (ODC), S-adenosyl methione decarboxylase (SAMDC) and spermindine/spermine acetyl transferase (SSAT) in polyamine metabolism are well studied, and has been modelled here.
Reyes-Palomares A, Monta\u00f1ez R, S\u00e1nchez-Jim\u00e9nez F, Medina MA.
Amino Acids 2012 Feb; 42(2-3): 597-610
Abstract:
Many molecular details remain to be uncovered concerning the regulation of polyamine metabolism. A previous model of mammalian polyamine metabolism showed that S-adenosyl methionine availability could play a key role in polyamine homeostasis. To get a deeper insight in this prediction, we have built a combined model by integration of the previously published polyamine model and one-carbon and glutathione metabolism model, published by different research groups. The combined model is robust and it is able to achieve physiological steady-state values, as well as to reproduce the predictions of the individual models. Furthermore, a transition between two versions of our model with new regulatory factors added properly simulates the switch in methionine adenosyl transferase isozymes occurring when the liver enters in proliferative conditions. The combined model is useful to support the previous prediction on the role of S-adenosyl methionine availability in polyamine homeostasis. Furthermore, it could be easily adapted to get deeper insights on the connections of polyamines with energy metabolism.
Notes by the author:
This model combines BIOMD0000000190 and BIOMD0000000268 from BioModels Database, both models include corrections respect to their originals publications.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
This a model from the article: Kinetic analysis of a molecular model of the budding yeast cell cycle. Chen KC, Csikasz-Nagy A, Gyorffy B, Val J, Novak B, Tyson JJ. Mol Biol Cell 2000 Jan;11(1):369-91 10637314 , Abstract: The molecular machinery of cell cycle control is known in more detail forbudding yeast, Saccharomyces cerevisiae, than for any other eukaryotic organism.In recent years, many elegant experiments on budding yeast have dissected theroles of cyclin molecules (Cln1-3 and Clb1-6) in coordinating the events of DNAsynthesis, bud emergence, spindle formation, nuclear division, and cellseparation. These experimental clues suggest a mechanism for the principalmolecular interactions controlling cyclin synthesis and degradation. Usingstandard techniques of biochemical kinetics, we convert the mechanism into a setof differential equations, which describe the time courses of three majorclasses of cyclin-dependent kinase activities. Model in hand, we examine themolecular events controlling \"Start\" (the commitment step to a new round ofchromosome replication, bud formation, and mitosis) and \"Finish\" (the transitionfrom metaphase to anaphase, when sister chromatids are pulled apart and the budseparates from the mother cell) in wild-type cells and 50 mutants. The modelaccounts for many details of the physiology, biochemistry, and genetics of cellcycle control in budding yeast.
This model originates from BioModels Database: A Database of Annotated Published Models (http://www.ebi.ac.uk/biomodels/). It is copyright (c) 2005-2011 The BioModels.net Team. To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
In summary, you are entitled to use this encoded model in absolutely any manner you deem suitable, verbatim, or with modification, alone or embedded it in a larger context, redistribute it, commercially or not, in a restricted way or not..
Vascular endothelium expressing endothelial nitric oxide synthase (eNOS) produces nitric oxide (NO), which has a number of important physiological functions in the microvasculature. The rate of NO production by the endothelium is a critical determinant of NO distribution in the vascular wall. We have analyzed the biochemical pathways of NO synthesis and formulated a model to estimate NO production by the microvascular endothelium under physiological conditions. The model quantifies the NO produced by eNOS based on the kinetics of NO synthesis and the availability of eNOS and its intracellular substrates. The predicted NO production from microvessels was in the range of 0.005-0.1 microM/s. This range of predicted values is in agreement with some experimental values but is much lower than other rates previously measured or estimated from experimental data with the help of mathematical modeling. Paradoxical discrepancies between the model predictions and previously reported results based on experimental measurements of NO concentration in the vicinity of the arteriolar wall suggest that NO can also be released through eNOS-independent mechanisms, such as catalysis by neuronal NOS (nNOS). We also used our model to test the sensitivity of NO production to substrate availability, eNOS concentration, and potential rate-limiting factors. The results indicated that the predicted low level of NO production can be attributed primarily to a low expression of eNOS in the microvascular endothelial cells.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
A. V. Hill's 1938 paper \"The heat of shortening and the dynamic constants of muscle\" is an enduring classic, presenting detailed methods, meticulous experiments, and the model of muscle contraction that now bears Hill's name. Pairing a simulation based on Hill's model with a reading of his paper allows students to follow his thought process to discover key principles of muscle physiology and gain insight into how to develop quantitative models of physiological processes. In this article, the experience of the author using this approach in a graduate biomedical engineering course is outlined, along with suggestions for adapting this approach to other audiences.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
Tomida T, Hirose K, Takizawa A, Shibasaki F, Iino M.
EMBO J. 2003 Aug; 22(15): 3825-3832
Abstract:
Transcription by the nuclear factor of activated T cells (NFAT) is regulated by the frequency of Ca(2+) oscillation. However, why and how Ca(2+) oscillation regulates NFAT activity remain elusive. NFAT is dephosphorylated by Ca(2+)-dependent phosphatase calcineurin and translocates from the cytoplasm to the nucleus to initiate transcription. We analyzed the kinetics of dephosphorylation and translocation of NFAT. We show that Ca(2+)-dependent dephosphorylation proceeds rapidly, while the rephosphorylation and nuclear transport of NFAT proceed slowly. Therefore, after brief Ca(2+) stimulation, dephosphorylated NFAT has a lifetime of several minutes in the cytoplasm. Thus, Ca(2+) oscillation induces a build-up of dephosphorylated NFAT in the cytoplasm, allowing effective nuclear translocation, provided that the oscillation interval is shorter than the lifetime of dephosphorylated NFAT. We also show that Ca(2+) oscillation is more cost-effective in inducing the translocation of NFAT than continuous Ca(2+) signaling. Thus, the lifetime of dephosphorylated NFAT functions as a working memory of Ca(2+) signals and enables the control of NFAT nuclear translocation by the frequency of Ca(2+) oscillation at a reduced cost of Ca(2+) signaling.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
This a model from the article: Macrophage dynamics in diabetic wound dealing. Waugh HV, Sherratt JA. Bull Math Biol 2006 Jan;68(1):197-207 16794927 , Abstract: Wound healing in diabetes is a complex process, characterised by a chronicinflammation phase. The exact mechanism by which this occurs is not fullyunderstood, and whilst several treatments for healing diabetic wounds exist,very little research has been conducted towards the causes of the extendedinflammation phase. We describe a mathematical model which offers a possibleexplanation for diabetic wound healing in terms of the distribution ofmacrophage phenotypes being altered in the diabetic patient compared to normalwound repair. As a consequence of this, we put forward a suggestion fortreatment based on rectifying the macrophage phenotype imbalance.
This model was taken from the CellML repository and automatically converted to SBML. The original model was: Waugh HV, Sherratt JA. (2006) - version=1.0 The original CellML model was created by: Catherine Lloyd c.lloyd@auckland.ac.nz The University of Auckland
This model originates from BioModels Database: A Database of Annotated Published Models (http://www.ebi.ac.uk/biomodels/). It is copyright (c) 2005-2011 The BioModels.net Team. To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
In summary, you are entitled to use this encoded model in absolutely any manner you deem suitable, verbatim, or with modification, alone or embedded it in a larger context, redistribute it, commercially or not, in a restricted way or not..
This a model from the article: Macrophage dynamics in diabetic wound dealing. Waugh HV, Sherratt JA. Bull Math Biol 2006 Jan;68(1):197-207 16794927 , Abstract: Wound healing in diabetes is a complex process, characterised by a chronicinflammation phase. The exact mechanism by which this occurs is not fullyunderstood, and whilst several treatments for healing diabetic wounds exist,very little research has been conducted towards the causes of the extendedinflammation phase. We describe a mathematical model which offers a possibleexplanation for diabetic wound healing in terms of the distribution ofmacrophage phenotypes being altered in the diabetic patient compared to normalwound repair. As a consequence of this, we put forward a suggestion fortreatment based on rectifying the macrophage phenotype imbalance.
This model was taken from the CellML repository and automatically converted to SBML. The original model was: Waugh HV, Sherratt JA. (2006) - version=1.0 The original CellML model was created by: Catherine Lloyd c.lloyd@auckland.ac.nz The University of Auckland
This model originates from BioModels Database: A Database of Annotated Published Models (http://www.ebi.ac.uk/biomodels/). It is copyright (c) 2005-2011 The BioModels.net Team. To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
In summary, you are entitled to use this encoded model in absolutely any manner you deem suitable, verbatim, or with modification, alone or embedded it in a larger context, redistribute it, commercially or not, in a restricted way or not..
This a model from the article: Macrophage dynamics in diabetic wound dealing. Waugh HV, Sherratt JA. Bull Math Biol 2006 Jan;68(1):197-207 16794927 , Abstract: Wound healing in diabetes is a complex process, characterised by a chronicinflammation phase. The exact mechanism by which this occurs is not fullyunderstood, and whilst several treatments for healing diabetic wounds exist,very little research has been conducted towards the causes of the extendedinflammation phase. We describe a mathematical model which offers a possibleexplanation for diabetic wound healing in terms of the distribution ofmacrophage phenotypes being altered in the diabetic patient compared to normalwound repair. As a consequence of this, we put forward a suggestion fortreatment based on rectifying the macrophage phenotype imbalance.
This model was taken from the CellML repository and automatically converted to SBML. The original model was: Waugh HV, Sherratt JA. (2006) - version=1.0 The original CellML model was created by: Catherine Lloyd c.lloyd@auckland.ac.nz The University of Auckland
This model originates from BioModels Database: A Database of Annotated Published Models (http://www.ebi.ac.uk/biomodels/). It is copyright (c) 2005-2011 The BioModels.net Team. To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
In summary, you are entitled to use this encoded model in absolutely any manner you deem suitable, verbatim, or with modification, alone or embedded it in a larger context, redistribute it, commercially or not, in a restricted way or not..
This a model from the article: Complex bursting in pancreatic islets: a potential glycolytic mechanism. Wierschem K, Bertram R. J Theor Biol 2004 Jun 21;228(4):513-21 15178199 , Abstract: The electrical activity of insulin-secreting pancreatic islets of Langerhans ischaracterized by bursts of action potentials. Most often this bursting isperiodic, but in some cases it is modulated by an underlying slower rhythm. Wesuggest that the modulatory rhythm for this complex bursting pattern is due tooscillations in glycolysis, while the bursting itself is generated by some otherslow process. To demonstrate this hypothesis, we couple a minimal model ofglycolytic oscillations to a minimal model for activity-dependent bursting inislets. We show that the combined model can reproduce several complex burstingpatterns from mouse islets published in the literature, and we illustrate howthese complex oscillations are produced through the use of a fast/slow analysis.
This model was taken from the CellML repository and automatically converted to SBML. The original model was: Wierschem K, Bertram R. () - version=1.0 The original CellML model was created by: Ethan Choi mcho099@aucklanduni.ac.nz The University of Auckland
This model originates from BioModels Database: A Database of Annotated Published Models (http://www.ebi.ac.uk/biomodels/). It is copyright (c) 2005-2011 The BioModels.net Team. To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
In summary, you are entitled to use this encoded model in absolutely any manner you deem suitable, verbatim, or with modification, alone or embedded it in a larger context, redistribute it, commercially or not, in a restricted way or not..
This a model from the article: Specific therapy regimes could lead to long-term immunological control of HIV. Wodarz D, Nowak MA. Proc Natl Acad Sci U S A 1999 Dec 7;96(25):14464-9 10588728 , Abstract: We use mathematical models to study the relationship between HIV and the immunesystem during the natural course of infection and in the context of differentantiviral treatment regimes. The models suggest that an efficient cytotoxic Tlymphocyte (CTL) memory response is required to control the virus. We define CTLmemory as long-term persistence of CTL precursors in the absence of antigen.Infection and depletion of CD4(+) T helper cells interfere with CTL memorygeneration, resulting in persistent viral replication and disease progression.We find that antiviral drug therapy during primary infection can enable thedevelopment of CTL memory. In chronically infected patients, specific treatmentschedules, either including deliberate drug holidays or antigenic boosts of theimmune system, can lead to a re-establishment of CTL memory. Whether suchtreatment regimes would lead to long-term immunologic control deservesinvestigation under carefully controlled conditions.
This model was taken from the CellML repository and automatically converted to SBML. The original model was: Wodarz D, Nowak MA. (1999) - version=1.0 The original CellML model was created by: Catherine Lloyd c.lloyd@auckland.ac.nz The University of Auckland
This model originates from BioModels Database: A Database of Annotated Published Models (http://www.ebi.ac.uk/biomodels/). It is copyright (c) 2005-2011 The BioModels.net Team. To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
In summary, you are entitled to use this encoded model in absolutely any manner you deem suitable, verbatim, or with modification, alone or embedded it in a larger context, redistribute it, commercially or not, in a restricted way or not..
This a model from the article: Evolution of immunological memory and the regulation of competition betweenpathogens. Wodarz D. Curr Biol 2003 Sep 16;13(18):1648-52 13678598 , Abstract: Memory is a central characteristic of immune responses. It is defined as anelevated number of specific immune cells that remain after resolution ofinfection and can protect the host against reinfection. The evolution ofimmunological memory is subject to debate. The advantages of memory discussed sofar include protection from reinfection, control of chronic infection, and thetransfer of immune function to the next generation. Mathematical models are usedto identify a new force that can drive the evolution of immunological memory:the duration of memory can regulate the degree of competition between differentpathogens. While a long duration of memory provides lasting protection againstreinfection, it may also allow an inferior pathogen species to persist. This canbe detrimental for the host if the inferior pathogen is more virulent. On theother hand, a shorter duration of memory ensures that an inferior pathogenspecies is excluded. This can be beneficial for the host if the inferiorpathogen is more virulent. Thus, while in the absence of pathogen diversitymemory is always expected to evolve to a long duration, under specificcircumstances, memory can evolve toward shorter durations in the presence ofpathogen diversity.
This model was taken from the CellML repository and automatically converted to SBML. The original model was: Wodarz D. (2003) - version=1.0 The original CellML model was created by: Catherine Lloyd c.lloyd@auckland.ac.nz The University of Auckland
This model originates from BioModels Database: A Database of Annotated Published Models (http://www.ebi.ac.uk/biomodels/). It is copyright (c) 2005-2011 The BioModels.net Team. To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
In summary, you are entitled to use this encoded model in absolutely any manner you deem suitable, verbatim, or with modification, alone or embedded it in a larger context, redistribute it, commercially or not, in a restricted way or not..
This a model from the article: A dynamical perspective of CTL cross-priming and regulation: implications forcancer immunology. Wodarz D, Jansen VA. Immunol Lett 2003 May 1;86(3):213-27 12706524 , Abstract: Cytotoxic T lymphocytes (CTL) responses are required to fight many diseases suchas viral infections and tumors. At the same time, they can cause disease wheninduced inappropriately. Which factors regulate CTL and decide whether theyshould remain silent or react is open to debate. The phenomenon calledcross-priming has received attention in this respect. That is, CTL expansionoccurs if antigen is recognized on the surface of professional antigenpresenting cells (APCs). This is in contrast to direct presentation whereantigen is seen on the surface of the target cells (e.g. infected cells or tumorcells). Here we introduce a mathematical model, which takes the phenomenon ofcross-priming into account. We propose a new mechanism of regulation which isimplicit in the dynamics of the CTL: According to the model, the ability of aCTL response to become established depends on the ratio of cross-presentation todirect presentation of the antigen. If this ratio is relatively high, CTLresponses are likely to become established. If this ratio is relatively low,tolerance is the likely outcome. The behavior of the model includes a parameterregion where the outcome depends on the initial conditions. We discuss ourresults with respect to the idea of self/non-self discrimination and the dangersignal hypothesis. We apply the model to study the role of CTL in cancerinitiation, cancer evolution/progression, and therapeutic vaccination againstcancers.
This model was taken from the CellML repository and automatically converted to SBML. The original model was: Wodarz D, Jansen VA. (2003) - version=1.0 The original CellML model was created by: Catherine Lloyd c.lloyd@auckland.ac.nz The University of Auckland
This model originates from BioModels Database: A Database of Annotated Published Models (http://www.ebi.ac.uk/biomodels/). It is copyright (c) 2005-2011 The BioModels.net Team. To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
In summary, you are entitled to use this encoded model in absolutely any manner you deem suitable, verbatim, or with modification, alone or embedded it in a larger context, redistribute it, commercially or not, in a restricted way or not..
This a model from the article: Dynamics of killer T cell inflation in viral infections. Wodarz D, Sierro S, Klenerman P. J R Soc Interface 2007 Jun 22;4(14):533-43 17251133 , Abstract: Upon acute viral infection, a typical cytotoxic T lymphocyte (CTL) response ischaracterized by a phase of expansion and contraction after which it settles ata relatively stable memory level. Recently, experimental data from mice infectedwith murine cytomegalovirus (MCMV) showed different and unusual dynamics. Afteracute infection had resolved, some antigen specific CTL started to expand overtime despite the fact that no replicative virus was detectable. This phenomenonhas been termed as \"CTL memory inflation\". In order to examine the dynamics ofthis system further, we developed a mathematical model analysing the impact ofinnate and adaptive immune responses. According to this model, a potentiallyimportant contributor to CTL inflation is competition between the specific CTLresponse and an innate natural killer (NK) cell response. Inflation occurs mostreadily if the NK cell response is more efficient than the CTL at reducing virusload during acute infection, but thereafter maintains a chronic virus load whichis sufficient to induce CTL proliferation. The model further suggests thatweaker NK cell mediated protection can correlate with more pronounced CTLinflation dynamics over time. We present experimental data from mice infectedwith MCMV which are consistent with the theoretical predictions. This modelprovides valuable information and may help to explain the inflation of CMVspecific CD8+T cells seen in humans as they age.
This model originates from BioModels Database: A Database of Annotated Published Models (http://www.ebi.ac.uk/biomodels/). It is copyright (c) 2005-2011 The BioModels.net Team. To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
In summary, you are entitled to use this encoded model in absolutely any manner you deem suitable, verbatim, or with modification, alone or embedded it in a larger context, redistribute it, commercially or not, in a restricted way or not..
This a model from the article: Dynamics of killer T cell inflation in viral infections. Wodarz D, Sierro S, Klenerman P. J R Soc Interface 2007 Jun 22;4(14):533-43 17251133 , Abstract: Upon acute viral infection, a typical cytotoxic T lymphocyte (CTL) response ischaracterized by a phase of expansion and contraction after which it settles ata relatively stable memory level. Recently, experimental data from mice infectedwith murine cytomegalovirus (MCMV) showed different and unusual dynamics. Afteracute infection had resolved, some antigen specific CTL started to expand overtime despite the fact that no replicative virus was detectable. This phenomenonhas been termed as \"CTL memory inflation\". In order to examine the dynamics ofthis system further, we developed a mathematical model analysing the impact ofinnate and adaptive immune responses. According to this model, a potentiallyimportant contributor to CTL inflation is competition between the specific CTLresponse and an innate natural killer (NK) cell response. Inflation occurs mostreadily if the NK cell response is more efficient than the CTL at reducing virusload during acute infection, but thereafter maintains a chronic virus load whichis sufficient to induce CTL proliferation. The model further suggests thatweaker NK cell mediated protection can correlate with more pronounced CTLinflation dynamics over time. We present experimental data from mice infectedwith MCMV which are consistent with the theoretical predictions. This modelprovides valuable information and may help to explain the inflation of CMVspecific CD8+T cells seen in humans as they age.
This model originates from BioModels Database: A Database of Annotated Published Models (http://www.ebi.ac.uk/biomodels/). It is copyright (c) 2005-2011 The BioModels.net Team. To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
In summary, you are entitled to use this encoded model in absolutely any manner you deem suitable, verbatim, or with modification, alone or embedded it in a larger context, redistribute it, commercially or not, in a restricted way or not..
This a model from the article: Dynamics of killer T cell inflation in viral infections. Wodarz D, Sierro S, Klenerman P. J R Soc Interface 2007 Jun 22;4(14):533-43 17251133 , Abstract: Upon acute viral infection, a typical cytotoxic T lymphocyte (CTL) response ischaracterized by a phase of expansion and contraction after which it settles ata relatively stable memory level. Recently, experimental data from mice infectedwith murine cytomegalovirus (MCMV) showed different and unusual dynamics. Afteracute infection had resolved, some antigen specific CTL started to expand overtime despite the fact that no replicative virus was detectable. This phenomenonhas been termed as \"CTL memory inflation\". In order to examine the dynamics ofthis system further, we developed a mathematical model analysing the impact ofinnate and adaptive immune responses. According to this model, a potentiallyimportant contributor to CTL inflation is competition between the specific CTLresponse and an innate natural killer (NK) cell response. Inflation occurs mostreadily if the NK cell response is more efficient than the CTL at reducing virusload during acute infection, but thereafter maintains a chronic virus load whichis sufficient to induce CTL proliferation. The model further suggests thatweaker NK cell mediated protection can correlate with more pronounced CTLinflation dynamics over time. We present experimental data from mice infectedwith MCMV which are consistent with the theoretical predictions. This modelprovides valuable information and may help to explain the inflation of CMVspecific CD8+T cells seen in humans as they age.
This model originates from BioModels Database: A Database of Annotated Published Models (http://www.ebi.ac.uk/biomodels/). It is copyright (c) 2005-2011 The BioModels.net Team. To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
In summary, you are entitled to use this encoded model in absolutely any manner you deem suitable, verbatim, or with modification, alone or embedded it in a larger context, redistribute it, commercially or not, in a restricted way or not..
Thiaville JJ, Frelin O, Garc\u00eda-Salinas C, Harrison K, Hasnain G, Horenstein NA, D\u00edaz de la Garza RI, Henry CS, Hanson AD, de Cr\u00e9cy-Lagard V.
Front Microbiol 2016; 7: 431
Abstract:
Tetrahydrofolate (THF) and its one-carbon derivatives, collectively termed folates, are essential cofactors, but are inherently unstable. While it is clear that chemical oxidation can cleave folates or damage their pterin precursors, very little is known about enzymatic damage to these molecules or about whether the folate biosynthesis pathway responds adaptively to damage to its end-products. The presence of a duplication of the gene encoding the folate biosynthesis enzyme 6-hydroxymethyl-7,8-dihydropterin pyrophosphokinase (FolK) in many sequenced bacterial genomes combined with a strong chromosomal clustering of the folK gene with panB, encoding the 5,10-methylene-THF-dependent enzyme ketopantoate hydroxymethyltransferase, led us to infer that PanB has a side activity that cleaves 5,10-methylene-THF, yielding a pterin product that is recycled by FolK. Genetic and metabolic analyses of Escherichia coli strains showed that overexpression of PanB leads to accumulation of the likely folate cleavage product 6-hydroxymethylpterin and other pterins in cells and medium, and-unexpectedly-to a 46% increase in total folate content. In silico modeling of the folate biosynthesis pathway showed that these observations are consistent with the in vivo cleavage of 5,10-methylene-THF by a side-activity of PanB, with FolK-mediated recycling of the pterin cleavage product, and with regulation of folate biosynthesis by folates or their damage products.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
Thiaville JJ, Frelin O, Garc\u00eda-Salinas C, Harrison K, Hasnain G, Horenstein NA, D\u00edaz de la Garza RI, Henry CS, Hanson AD, de Cr\u00e9cy-Lagard V.
Front Microbiol 2016; 7: 431
Abstract:
Tetrahydrofolate (THF) and its one-carbon derivatives, collectively termed folates, are essential cofactors, but are inherently unstable. While it is clear that chemical oxidation can cleave folates or damage their pterin precursors, very little is known about enzymatic damage to these molecules or about whether the folate biosynthesis pathway responds adaptively to damage to its end-products. The presence of a duplication of the gene encoding the folate biosynthesis enzyme 6-hydroxymethyl-7,8-dihydropterin pyrophosphokinase (FolK) in many sequenced bacterial genomes combined with a strong chromosomal clustering of the folK gene with panB, encoding the 5,10-methylene-THF-dependent enzyme ketopantoate hydroxymethyltransferase, led us to infer that PanB has a side activity that cleaves 5,10-methylene-THF, yielding a pterin product that is recycled by FolK. Genetic and metabolic analyses of Escherichia coli strains showed that overexpression of PanB leads to accumulation of the likely folate cleavage product 6-hydroxymethylpterin and other pterins in cells and medium, and-unexpectedly-to a 46% increase in total folate content. In silico modeling of the folate biosynthesis pathway showed that these observations are consistent with the in vivo cleavage of 5,10-methylene-THF by a side-activity of PanB, with FolK-mediated recycling of the pterin cleavage product, and with regulation of folate biosynthesis by folates or their damage products.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
On the basis of a detailed model of yeast glycolysis, the effect of intercellular dynamics is analysed theoretically. The model includes the main steps of anaerobic glycolysis, and the production of ethanol and glycerol. Transmembrane diffusion of acetaldehyde is included, since it has been hypothesized that this substance mediates the interaction. Depending on the kinetic parameter, the single-cell model shows both stationary and oscillatory behaviour. This agrees with experimental data with respect to metabolite concentrations and phase shifts. The inclusion of intercellular coupling leads to a variety of dynamical modes, such as synchronous oscillations, and different kinds of asynchronous behavior. These oscillations can co-exist, leading to bi- and tri-rhythmicity. The corresponding parameter regions have been identified by a bifurcation analysis. The oscillatory dynamics of synchronized cell populations are investigated by calculating the phase responses to acetaldehyde pulses. Simulations are performed with respect to the synchronization of two subpopulations that are oscillating out of phase before mixing. The effect of the various process on synchronization is characterized quantitatively. While continuous exchange of acetaldehyde might synchronize the oscillations for appropriate sets of parameter values, the calculated synchronization time is longer than that observed experimentally. It is concluded either that addition to the transmembrane exchange of acetaldehyde, other processes may contribute to intercellular coupling, or that intracellular regulator feedback plays a role in the acceleration of the synchronization. for appropriate sets of parameter values, the calculated synchronization time is longer than that observed experimentally. It is concluded either that addition to the transmembrane exchange of acetaldehyde, other processes may contribute to intercellular coupling, or that intracellular regulator feedback plays a role in the acceleration of the synchronization.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
Individual rate constants have been determined for each step of the Ras.GTP hydrolysis mechanism, activated by neurofibromin. Fluorescence intensity and anisotropy stopped-flow measurements used the fluorescent GTP analogue, mantGTP (2'(3')-O-(N-methylanthraniloyl)GTP), to determine rate constants for binding and release of neurofibromin. Quenched flow measurements provided the kinetics of the hydrolytic cleavage step. The fluorescent phosphate sensor, MDCC-PBP was used to measure phosphate release kinetics. Phosphate-water oxygen exchange, using (18)O-substituted GTP and inorganic phosphate (P(i)), was used to determine the extent of reversal of the hydrolysis step and of P(i) binding. The data show that neurofibromin and P(i) dissociate from the NF1.Ras.GDP.P(i) complex with identical kinetics, which are 3-fold slower than the preceding cleavage step. A model is presented in which the P(i) release is associated with the change of Ras from \"GTP\" to \"GDP\" conformation. In this model, the conformation change on P(i) release causes the large change in affinity of neurofibromin, which then dissociates rapidly.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
Riluzole is known to be of therapeutic use in the management of amyotrophic lateral sclerosis. In this study, we investigated the effects of riluzole on ion currents in cultured differentiated human skeletal muscle cells (dHSkMCs). Western blotting revealed the protein expression of alpha-subunits for both large-conductance Ca2+-activated K+ (BK(Ca)) channel and Na+ channel (Na(v)1.5) in these cells. Riluzole could reduce the frequency of spontaneous beating in dHSkMCs. In whole-cell configuration, riluzole suppressed voltage-gated Na+ current (I(Na)) in a concentration-dependent manner with an IC50 value of 2.3 microM. Riluzole (10 microM) also effectively increased Ca2+-activated K+ current (I(K(Ca))) which could be reversed by iberiotoxin (200 nM) and paxilline (1 microM), but not by apamin (200 nM). In inside-out patches, when applied to the inside of the cell membrane, riluzole (10 microM) increased BK(Ca)-channel activity with a decrease in mean closed time. Simulation studies also unraveled that both decreased conductance of I(Na) and increased conductance of I(K(Ca)) utilized to mimic riluzole actions in skeletal muscle cells could combine to decrease the amplitude of action potentials and increase the repolarization of action potentials. Taken together, inhibition of I(Na) and stimulation of BK(Ca)-channel activity caused by this drug are partly, if not entirely, responsible for its muscle relaxant actions in clinical setting.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
F\u00e9lix Garza ZC, Liebmann J, Born M, Hilbers PA, van Riel NA.
Front Physiol 2017; 8: 28
Abstract:
Clinical investigations prove that blue light irradiation reduces the severity of psoriasis vulgaris. Nevertheless, the mechanisms involved in the management of this condition remain poorly defined. Despite the encouraging results of the clinical studies, no clear guidelines are specified in the literature for the irradiation scheme regime of blue light-based therapy for psoriasis. We investigated the underlying mechanism of blue light irradiation of psoriatic skin, and tested the hypothesis that regulation of proliferation is a key process. We implemented a mechanistic model of cellular epidermal dynamics to analyze whether a temporary decrease of keratinocytes hyper-proliferation can explain the outcome of phototherapy with blue light. Our results suggest that the main effect of blue light on keratinocytes impacts the proliferative cells. They show that the decrease in the keratinocytes proliferative capacity is sufficient to induce a transient decrease in the severity of psoriasis. To study the impact of the therapeutic regime on the efficacy of psoriasis treatment, we performed simulations for different combinations of the treatment parameters, i.e., length of treatment, fluence (also referred to as dose), and intensity. These simulations indicate that high efficacy is achieved by regimes with long duration and high fluence levels, regardless of the chosen intensity. Our modeling approach constitutes a framework for testing diverse hypotheses on the underlying mechanism of blue light-based phototherapy, and for designing effective strategies for the treatment of psoriasis.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
Boada2016 - Incoherent type 1 feed-forwardloop (I1-FFL)
A synthetic-biology mathematicalmodelling framework that was constructed to provide guidelines forexperimental implementation and parameter optimisation resulted ina biological device demonstrating desired behaviour.
Model based design plays a fundamental role in synthetic biology. Exploiting modularity, i.e. using biological parts and interconnecting them to build new and more complex biological circuits is one of the key issues. In this context, mathematical models have been used to generate predictions of the behavior of the designed device. Designers not only want the ability to predict the circuit behavior once all its components have been determined, but also to help on the design and selection of its biological parts, i.e. to provide guidelines for the experimental implementation. This is tantamount to obtaining proper values of the model parameters, for the circuit behavior results from the interplay between model structure and parameters tuning. However, determining crisp values for parameters of the involved parts is not a realistic approach. Uncertainty is ubiquitous to biology, and the characterization of biological parts is not exempt from it. Moreover, the desired dynamical behavior for the designed circuit usually results from a trade-off among several goals to be optimized.We propose the use of a multi-objective optimization tuning framework to get a model-based set of guidelines for the selection of the kinetic parameters required to build a biological device with desired behavior. The design criteria are encoded in the formulation of the objectives and optimization problem itself. As a result, on the one hand the designer obtains qualitative regions/intervals of values of the circuit parameters giving rise to the predefined circuit behavior; on the other hand, he obtains useful information for its guidance in the implementation process. These parameters are chosen so that they can effectively be tuned at the wet-lab, i.e. they are effective biological tuning knobs. To show the proposed approach, the methodology is applied to the design of a well known biological circuit: a genetic incoherent feed-forward circuit showing adaptive behavior.The proposed multi-objective optimization design framework is able to provide effective guidelines to tune biological parameters so as to achieve a desired circuit behavior. Moreover, it is easy to analyze the impact of the context on the synthetic device to be designed. That is, one can analyze how the presence of a downstream load influences the performance of the designed circuit, and take it into account.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
Early cell cycles of Xenopus laevis embryos are characterized by rapid oscillations in the activity of two cyclin-dependent kinases. Cdk1 activity peaks at mitosis, driven by periodic degradation of cyclins A and B. In contrast, Cdk2 activity oscillates twice per cell cycle, despite a constant level of its partner, cyclin E. Cyclin E degrades at a fixed time after fertilization, normally corresponding to the midblastula transition. Based on published data and new experiments, we constructed a mathematical model in which: (1) oscillations in Cdk2 activity depend upon changes in phosphorylation, (2) Cdk2 participates in a negative feedback loop with the inhibitory kinase Wee1; (3) cyclin E is cooperatively removed from the oscillatory system; and (4) removed cyclin E is degraded by a pathway activated by cyclin E/Cdk2 itself. The model's predictions about embryos injected with Xic1, a stoichiometric inhibitor of cyclin E/Cdk2, were experimentally validated.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
Building on the work of Martinov et al. (2000), a mathematical model is developed for the methionine cycle. A large amount of information is available about the enzymes that catalyse individual reaction steps in the cycle, from methionine to S-adenosylmethionine to S-adenosylhomocysteine to homocysteine, and the removal of mass from the cycle by the conversion of homocysteine to cystathionine. Nevertheless, the behavior of the cycle is very complicated since many substrates alter the activities of the enzymes in the reactions that produce them, and some can also alter the activities of other enzymes in the cycle. The model consists of four differential equations, based on known reaction kinetics, that can be solved to give the time course of the concentrations of the four main substrates in the cycle under various circumstances. We show that the behavior of the model in response to genetic abnormalities and dietary deficiencies is similar to the changes seen in a wide variety of experimental studies. We conduct computational \"experiments\" that give understanding of the regulatory behavior of the methionine cycle under normal conditions and the behavior in the presence of genetic variation and dietary deficiencies.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
Caydasi AK, Lohel M, Gr\u00fcnert G, Dittrich P, Pereira G, Ibrahim B.
Mol. Syst. Biol. 2012; 8: 582
Abstract:
The orientation of the mitotic spindle with respect to the polarity axis is crucial for the accuracy of asymmetric cell division. In budding yeast, a surveillance mechanism called the spindle position checkpoint (SPOC) prevents exit from mitosis when the mitotic spindle fails to align along the mother-to-daughter polarity axis. SPOC arrest relies upon inhibition of the GTPase Tem1 by the GTPase-activating protein (GAP) complex Bfa1-Bub2. Importantly, reactions signaling mitotic exit take place at yeast centrosomes (named spindle pole bodies, SPBs) and the GAP complex also promotes SPB localization of Tem1. Yet, whether the regulation of Tem1 by Bfa1-Bub2 takes place only at the SPBs remains elusive. Here, we present a quantitative analysis of Bfa1-Bub2 and Tem1 localization at the SPBs. Based on the measured SPB-bound protein levels, we introduce a dynamical model of the SPOC that describes the regulation of Bfa1 and Tem1. Our model suggests that Bfa1 interacts with Tem1 in the cytoplasm as well as at the SPBs to provide efficient Tem1 inhibition.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
Heldt FS, Barr AR, Cooper S, Bakal C, Nov\u00e1k B.
Proc. Natl. Acad. Sci. U.S.A. 2018 Feb; :
Abstract:
Human cells that suffer mild DNA damage can enter a reversible state of growth arrest known as quiescence. This decision to temporarily exit the cell cycle is essential to prevent the propagation of mutations, and most cancer cells harbor defects in the underlying control system. Here we present a mechanistic mathematical model to study the proliferation-quiescence decision in nontransformed human cells. We show that two bistable switches, the restriction point (RP) and the G1/S transition, mediate this decision by integrating DNA damage and mitogen signals. In particular, our data suggest that the cyclin-dependent kinase inhibitor p21 (Cip1/Waf1), which is expressed in response to DNA damage, promotes quiescence by blocking positive feedback loops that facilitate G1 progression downstream of serum stimulation. Intriguingly, cells exploit bistability in the RP to convert graded p21 and mitogen signals into an all-or-nothing cell-cycle response. The same mechanism creates a window of opportunity where G1 cells that have passed the RP can revert to quiescence if exposed to DNA damage. We present experimental evidence that cells gradually lose this ability to revert to quiescence as they progress through G1 and that the onset of rapid p21 degradation at the G1/S transition prevents this response altogether, insulating S phase from mild, endogenous DNA damage. Thus, two bistable switches conspire in the early cell cycle to provide both sensitivity and robustness to external stimuli.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
This model is from the article: A dynamical model of the spindle position checkpoint Ayse Koca Caydasi, Maiko Lohel, Gerd Gr\u00fcnert, Peter Dittrich, Gislene Pereira, Bashar Ibrahim Molecular Systems Biology 2012; 582 doi: 10.1038/msb.2012.15 Abstract: The orientation of the mitotic spindle with respect to the polarity axis is crucial for the accuracy of asymmetric cell division. In budding yeast, a surveillance mechanism called the spindle position checkpoint (SPOC) prevents exit from mitosis when the mitotic spindle fails to align along the mother-to-daughter polarity axis. SPOC arrest relies upon inhibition of the GTPase Tem1 by the GTPase-activating protein (GAP) complex Bfa1\u2013Bub2. Importantly, reactions signaling mitotic exit take place at yeast centrosomes (named spindle pole bodies, SPBs) and the GAP complex also promotes SPB localization of Tem1. Yet, whether the regulation of Tem1 by Bfa1\u2013Bub2 takes place only at the SPBs remains elusive. Here, we present a quantitative analysis of Bfa1\u2013Bub2 and Tem1 localization at the SPBs. Based on the measured SPB-bound protein levels, we introduce a dynamical model of the SPOC that describes the regulation of Bfa1 and Tem1. Our model suggests that Bfa1 interacts with Tem1 in the cytoplasm as well as at the SPBs to provide efficient Tem1 inhibition.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
In summary, you are entitled to use this encoded model in absolutely any manner you deem suitable, verbatim, or with modification, alone or embedded it in a larger context, redistribute it, commercially or not, in a restricted way or not.
Caydasi AK, Lohel M, Gr\u00fcnert G, Dittrich P, Pereira G, Ibrahim B.
Mol. Syst. Biol. 2012; 8: 582
Abstract:
The orientation of the mitotic spindle with respect to the polarity axis is crucial for the accuracy of asymmetric cell division. In budding yeast, a surveillance mechanism called the spindle position checkpoint (SPOC) prevents exit from mitosis when the mitotic spindle fails to align along the mother-to-daughter polarity axis. SPOC arrest relies upon inhibition of the GTPase Tem1 by the GTPase-activating protein (GAP) complex Bfa1-Bub2. Importantly, reactions signaling mitotic exit take place at yeast centrosomes (named spindle pole bodies, SPBs) and the GAP complex also promotes SPB localization of Tem1. Yet, whether the regulation of Tem1 by Bfa1-Bub2 takes place only at the SPBs remains elusive. Here, we present a quantitative analysis of Bfa1-Bub2 and Tem1 localization at the SPBs. Based on the measured SPB-bound protein levels, we introduce a dynamical model of the SPOC that describes the regulation of Bfa1 and Tem1. Our model suggests that Bfa1 interacts with Tem1 in the cytoplasm as well as at the SPBs to provide efficient Tem1 inhibition.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
Diedrichs DR, Gomez JA, Huang CS, Rutkowski DT, Curtu R.
Mol. Biol. Cell 2018 Apr; : mbcE17090565
Abstract:
The vertebrate unfolded protein response (UPR) is characterized by multiple interacting nodes among its three pathways, yet the logic underlying this regulatory complexity is unclear. To begin to address this issue, we created a computational model of the vertebrate UPR that was entrained upon and then validated against experimental data. As part of this validation, the model successfully predicted the phenotypes of cells with lesions in UPR signaling, including a surprising and previously unreported differential role for the eIF2? phosphatase GADD34 in exacerbating severe stress but ameliorating mild stress. We then used the model to test the functional importance of a feed-forward circuit within the PERK/CHOP axis, and of cross-regulatory control of BiP and CHOP expression. We found that the wiring structure of the UPR appears to balance the ability of the response to remain sensitive to ER stress yet also to be rapidly deactivated by improved protein folding conditions. This model should serve as a valuable resource for further exploring the regulatory logic of the UPR.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
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- "name": "Aguda1999 - G2 DNA damage checkpoint",
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- "summary": "Baltazar D. Aguda. A quantitative analysis of the kinetics of the G(2) DNA damage checkpoint system. Proceedings of the National Academy of Sciences 96, 20 (1999).A detailed model of the G(2) DNA damage checkpoint (G2DDC) system is presented that includes complex regulatory networks of the mitotic kinase Cdc2, phosphatase Cdc25, Wee1 kinase, and damage signal transduction pathways involving Chk1 and p53. Assumptions on the kinetic equations of the G2DDC are made, and computer simulations are carried out to demonstrate how the various subsystems operate to delay or arrest cell cycle progression. The detailed model could be used to explain various experiments relevant to G2DDC reported recently, including the nuclear export of 14-3-3-bound Cdc25, the down-regulation of cyclin B1 expression by p53, the effect of Chk1 and p53 on Cdc25 levels, and Wee1 degradation. It also is shown that, under certain conditions, p53 is necessary to sustain a G(2) arrest.",
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- "timestamp_created": "2025-01-30 14:03:22.429188+00:00",
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- "id": 2993,
- "name": "Smith2010 - Response of FOXO Transcription Factors to Post-Translational Modifications Made by Ageing-Related Signalling Pathways",
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- "summary": "Graham R. Smith & Daryl P. Shanley. Modelling the response of FOXO transcription factors to multiple post-translational modifications made by ageing-related signalling pathways. PLoS ONE 5, 6 (2010).FOXO transcription factors are an important, conserved family of regulators of cellular processes including metabolism, cell-cycle progression, apoptosis and stress resistance. They are required for the efficacy of several of the genetic interventions that modulate lifespan. FOXO activity is regulated by multiple post-translational modifications (PTMs) that affect its subcellular localization, half-life, DNA binding and transcriptional activity. Here, we show how a mathematical modelling approach can be used to simulate the effects, singly and in combination, of these PTMs. Our model is implemented using the Systems Biology Markup Language (SBML), generated by an ancillary program and simulated in a stochastic framework. The use of the ancillary program to generate the SBML is necessary because the possibility that many regulatory PTMs may be added, each independently of the others, means that a large number of chemically distinct forms of the FOXO molecule must be taken into account, and the program is used to generate them. Although the model does not yet include detailed representations of events upstream and downstream of FOXO, we show how it can qualitatively, and in some cases quantitatively, reproduce the known effects of certain treatments that induce various single and multiple PTMs, and allows for a complex spatiotemporal interplay of effects due to the activation of multiple PTM-inducing treatments. Thus, it provides an important framework to integrate current knowledge about the behaviour of FOXO. The approach should be generally applicable to other proteins experiencing multiple regulations.",
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- "timestamp_created": "2025-01-30 14:03:23.122830+00:00",
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- "name": "Smith2010 - Response of FOXO Transcription Factors to Post-Translational Modifications (with acetylation pathway)",
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- "summary": "Graham R. Smith & Daryl P. Shanley. Modelling the response of FOXO transcription factors to multiple post-translational modifications made by ageing-related signalling pathways. PLoS ONE 5, 6 (2010).FOXO transcription factors are an important, conserved family of regulators of cellular processes including metabolism, cell-cycle progression, apoptosis and stress resistance. They are required for the efficacy of several of the genetic interventions that modulate lifespan. FOXO activity is regulated by multiple post-translational modifications (PTMs) that affect its subcellular localization, half-life, DNA binding and transcriptional activity. Here, we show how a mathematical modelling approach can be used to simulate the effects, singly and in combination, of these PTMs. Our model is implemented using the Systems Biology Markup Language (SBML), generated by an ancillary program and simulated in a stochastic framework. The use of the ancillary program to generate the SBML is necessary because the possibility that many regulatory PTMs may be added, each independently of the others, means that a large number of chemically distinct forms of the FOXO molecule must be taken into account, and the program is used to generate them. Although the model does not yet include detailed representations of events upstream and downstream of FOXO, we show how it can qualitatively, and in some cases quantitatively, reproduce the known effects of certain treatments that induce various single and multiple PTMs, and allows for a complex spatiotemporal interplay of effects due to the activation of multiple PTM-inducing treatments. Thus, it provides an important framework to integrate current knowledge about the behaviour of FOXO. The approach should be generally applicable to other proteins experiencing multiple regulations.",
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- "name": "Revilla2003 - Controlling HIV infection using recombinant viruses",
- "repository_type": "biomodels",
- "summary": "
This a model from the article: Fighting a virus with a virus: a dynamic model for HIV-1 therapy. Revilla T, Garcia-Ramos G. Math Biosci 2003 Oct;185(2):191-203 12941536 , Abstract: A mathematical model examined a potential therapy for controlling viralinfections using genetically modified viruses. The control of the infection isan indirect effect of the selective elimination by an engineered virus ofinfected cells that are the source of the pathogens. Therefore, this engineeredvirus could greatly compensate for a dysfunctional immune system compromised byAIDS. In vitro studies using engineered viruses have been shown to decrease theHIV-1 load about 1000-fold. However, the efficacy of this potential treatmentfor reducing the viral load in AIDS patients is unknown. The present modelstudied the interactions among the HIV-1 virus, its main host cell (activatedCD4+ T cells), and a therapeutic engineered virus in an in vivo context; and itexamined the conditions for controlling the pathogen. This model predicted asignificant drop in the HIV-1 load, but the treatment does not eradicate HIV. Abasic estimation using a currently engineered virus indicated an HIV-1 loadreduction of 92% and a recovery of host cells to 17% of their normal level.Greater success (98% HIV reduction, 44% host cells recovery) is expected as morecompetent engineered viruses are designed. These results suggest that therapyusing viruses could be an alternative to extend the survival of AIDS patients.
This model was taken from the CellML repository and automatically converted to SBML. The original model was: Revilla T, Garcia-Ramos G. (2003) - version=1.0 The original CellML model was created by: Catherine Lloyd c.lloyd@auckland.ac.nz The University of Auckland
This model originates from BioModels Database: A Database of Annotated Published Models (http://www.ebi.ac.uk/biomodels/). It is copyright (c) 2005-2011 The BioModels.net Team. To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
In summary, you are entitled to use this encoded model in absolutely any manner you deem suitable, verbatim, or with modification, alone or embedded it in a larger context, redistribute it, commercially or not, in a restricted way or not..
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- "tag": "Homo sapiens"
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- "id": 4111,
- "tag": "Human immunodeficiency virus 1"
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- "timestamp_created": "2025-01-30 14:03:24.106406+00:00",
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- "default_context": "12",
- "id": 2996,
- "name": "Liu2017 - Dynamics of Avian Influenza with Logistic Growth",
- "repository_type": "biomodels",
- "summary": "Sanhong Liu, Shigui Ruan & Xinan Zhang. Nonlinear dynamics of avian influenza epidemic models. Mathematical Biosciences 283 (2017).Avian influenza is a zoonotic disease caused by the transmission of the avian influenza A virus, such as H5N1 and H7N9, from birds to humans. The avian influenza A H5N1 virus has caused more than 500 human infections worldwide with nearly a 60% death rate since it was first reported in Hong Kong in 1997. The four outbreaks of the avian influenza A H7N9 in China from March 2013 to June 2016 have resulted in 580 human cases including 202 deaths with a death rate of nearly 35%. In this paper, we construct two avian influenza bird-to-human transmission models with different growth laws of the avian population, one with logistic growth and the other with Allee effect, and analyze their dynamical behavior. We obtain a threshold value for the prevalence of avian influenza and investigate the local or global asymptotical stability of each equilibrium of these systems by using linear analysis technique or combining Liapunov function method and LaSalle's invariance principle, respectively. Moreover, we give necessary and sufficient conditions for the occurrence of periodic solutions in the avian influenza system with Allee effect of the avian population. Numerical simulations are also presented to illustrate the theoretical results.",
- "tags": [
- {
- "id": 4174,
- "tag": "Aves"
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- {
- "id": 2936,
- "tag": "BioModels"
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- {
- "id": 4175,
- "tag": "BioModels:BIOMD0000000708"
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- {
- "id": 3002,
- "tag": "Homo sapiens"
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- "timestamp_created": "2025-01-30 14:03:24.632560+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000000708",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "2997": {
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- "default_context": "8",
- "id": 2997,
- "name": "Liu2017 - Dynamics of Avian Influenza with Allee Growth Effect",
- "repository_type": "biomodels",
- "summary": "Sanhong Liu, Shigui Ruan & Xinan Zhang. Nonlinear dynamics of avian influenza epidemic models. Mathematical Biosciences 283 (2017).Avian influenza is a zoonotic disease caused by the transmission of the avian influenza A virus, such as H5N1 and H7N9, from birds to humans. The avian influenza A H5N1 virus has caused more than 500 human infections worldwide with nearly a 60% death rate since it was first reported in Hong Kong in 1997. The four outbreaks of the avian influenza A H7N9 in China from March 2013 to June 2016 have resulted in 580 human cases including 202 deaths with a death rate of nearly 35%. In this paper, we construct two avian influenza bird-to-human transmission models with different growth laws of the avian population, one with logistic growth and the other with Allee effect, and analyze their dynamical behavior. We obtain a threshold value for the prevalence of avian influenza and investigate the local or global asymptotical stability of each equilibrium of these systems by using linear analysis technique or combining Liapunov function method and LaSalle's invariance principle, respectively. Moreover, we give necessary and sufficient conditions for the occurrence of periodic solutions in the avian influenza system with Allee effect of the avian population. Numerical simulations are also presented to illustrate the theoretical results.",
- "tags": [
- {
- "id": 4174,
- "tag": "Aves"
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- {
- "id": 2936,
- "tag": "BioModels"
- },
- {
- "id": 4176,
- "tag": "BioModels:BIOMD0000000709"
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- {
- "id": 3002,
- "tag": "Homo sapiens"
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- {
- "id": 704,
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- "timestamp_created": "2025-01-30 14:03:25.155402+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000000709",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "2998": {
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- "content_types": "modeling",
- "content_types_list": [
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- "default_context": "10",
- "id": 2998,
- "name": "Hernandez-Vargas2012 - Innate immune system dynamics to Influenza virus",
- "repository_type": "biomodels",
- "summary": "A. Esteban Hernandez-Vargas & Michael Meyer-Hermann. Innate Immune System Dynamics to Influenza Virus. IFAC Proceedings Volumes 45, 18 (2012).The understanding of how influenza virus infection activates the immune system is crucial to designing prophylactic and therapeutic strategies against the infection. Nevertheless, the immune response to influenza virus infection is complex and remains largely unknown. In this paper we focus in the innate immune response to influenza virus using a mathematical model, based on interferon-induced resistance to infection of respiratory epithelial cells and the clearance of infected cells by natural killers. Simulation results show the importance of IFN-I to prevent new infections in epithelial cells and to stop the viral explosion during the first two days after infection. Nevertheless, natural killers response might be the most relevant for the first depletion in viral load due to the elimination of infected cells. Based on the reproductive number, the innate immune response is important to control the infection, although it would not be enough to clear completely the virus. The effective coordination between innate and adaptive immune response is essential for the virus eradication.",
- "tags": [
- {
- "id": 2936,
- "tag": "BioModels"
- },
- {
- "id": 4177,
- "tag": "BioModels:BIOMD0000000710"
- },
- {
- "id": 3002,
- "tag": "Homo sapiens"
- },
- {
- "id": 3782,
- "tag": "Influenza A virus"
- },
- {
- "id": 704,
- "tag": "SBML"
- }
- ],
- "timestamp_created": "2025-01-30 14:03:25.648249+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000000710",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "2999": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
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- "default_context": "8",
- "id": 2999,
- "name": "Hancioglu2007 - Human Immune Response to Influenza A virus Infection",
- "repository_type": "biomodels",
- "summary": "Baris Hancioglu, David Swigon & Gilles Clermont. A dynamical model of human immune response to influenza A virus infection. Journal of Theoretical Biology 246, 1 (2007).We present a simplified dynamical model of immune response to uncomplicated influenza A virus (IAV) infection, which focuses on the control of the infection by the innate and adaptive immunity. Innate immunity is represented by interferon-induced resistance to infection of respiratory epithelial cells and by removal of infected cells by effector cells (cytotoxic T-cells and natural killer cells). Adaptive immunity is represented by virus-specific antibodies. Similar in spirit to the recent model of Bocharov and Romanyukha [1994. Mathematical model of antiviral immune response. III. Influenza A virus infection. J. Theor. Biol. 167, 323-360], the model is constructed as a system of 10 ordinary differential equations with 27 parameters characterizing the rates of various processes contributing to the course of disease. The parameters are derived from published experimental data or estimated so as to reproduce available data about the time course of IAV infection in a na\u00efve host. We explore the effect of initial viral load on the severity and duration of the disease, construct a phase diagram that sheds insight into the dynamics of the disease, and perform sensitivity analysis on the model parameters to explore which ones influence the most the onset, duration and severity of infection. To account for the variability and speed of adaptation of the adaptive response to a particular virus strain, we introduce a variable that quantifies the antigenic compatibility between the virus and the antibodies currently produced by the organism. We find that for small initial viral load the disease progresses through an asymptomatic course, for intermediate value it takes a typical course with constant duration and severity of infection but variable onset, and for large initial viral load the disease becomes severe. This behavior is robust to a wide range of parameter values. The absence of antibody response leads to recurrence of disease and appearance of a chronic state with nontrivial constant viral load.",
- "tags": [
- {
- "id": 2936,
- "tag": "BioModels"
- },
- {
- "id": 4178,
- "tag": "BioModels:BIOMD0000000711"
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- {
- "id": 3002,
- "tag": "Homo sapiens"
- },
- {
- "id": 3782,
- "tag": "Influenza A virus"
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- {
- "id": 704,
- "tag": "SBML"
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- ],
- "timestamp_created": "2025-01-30 14:03:26.142849+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000000711",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "3000": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
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- "default_context": "8",
- "id": 3000,
- "name": "Manchanda2014 - Effect on Immune System by 4 different Influenza A virus strains",
- "repository_type": "biomodels",
- "summary": "Himanshu Manchanda, Nora Seidel, Andi Krumbholz, Andreas Sauerbrei, Michaela Schmidtke & Reinhard Guthke. Within-host influenza dynamics: a small-scale mathematical modeling approach. Biosystems 118 (2014).The emergence of new influenza viruses like the pandemic H1N1 influenza A virus in 2009 (A(H1N1)pdm09) with unpredictable difficulties in vaccine coverage and established antiviral treatment protocols emphasizes the need of new murine models to prove the activity of novel antiviral compounds in vivo. The aim of the present study was to develop a small-scale mathematical model based on easily attainable experimental data to explain differences in influenza kinetics induced by different virus strains in mice. To develop a three-dimensional ordinary differential equation model of influenza dynamics, the following variables were included: (i) viral pathogenicity (P), (ii) antiviral immune defense (D), and (iii) inflammation due to pro-inflammatory response (I). Influenza virus-induced symptoms (clinical score S) in mice provided the basis for calculations of P and I. Both, mono- and biphasic course of mild to severe influenza induced by three clinical A(H1N1)pdm09 strains and one European swine H1N2 virus were comparatively and quantitatively studied by fitting the mathematical model to the experimental data. The model hypothesizes reasons for mild and severe influenza with mono- as well as biphasic course of disease. According to modeling results, the second peak of the biphasic course of infection is caused by inflammation. The parameters (i) maximum primary pathogenicity, (ii) viral infection rate, and (iii) rate of activation of the immune system represent most important parameters that quantitatively characterize the different pattern of virus-specific influenza kinetics.",
- "tags": [
- {
- "id": 2936,
- "tag": "BioModels"
- },
- {
- "id": 4179,
- "tag": "BioModels:BIOMD0000000712"
- },
- {
- "id": 4180,
- "tag": "Influenza A virus (A/Jena/5258/2009(H1N1))"
- },
- {
- "id": 3090,
- "tag": "Mus musculus"
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- {
- "id": 704,
- "tag": "SBML"
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- ],
- "timestamp_created": "2025-01-30 14:03:26.649577+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000000712",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "3001": {
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- "default_context": "9",
- "id": 3001,
- "name": "Aston2018 - Dynamics of Hepatitis C Infection",
- "repository_type": "biomodels",
- "summary": "Philip Aston. A New Model for the Dynamics of Hepatitis C Infection: Derivation, Analysis and Implications. Viruses 10, 4 (2018).We review various existing models of hepatitis C virus (HCV) infection and show that there are inconsistencies between the models and known behaviour of the infection. A new model for HCV infection is proposed, based on various dynamical processes that occur during the infection that are described in the literature. This new model is analysed, and three steady state branches of solutions are found when there is no stem cell generation of hepatocytes. Unusually, the branch of infected solutions that connects the uninfected branch and the pure infection branch can be found analytically and always includes a limit point, subject to a few conditions on the parameters. When the action of stem cells is included, the bifurcation between the pure infection and infected branches unfolds, leaving a single branch of infected solutions. It is shown that this model can generate various viral load profiles that have been described in the literature, which is confirmed by fitting the model to four viral load datasets. Suggestions for possible changes in treatment are made based on the model.",
- "tags": [
- {
- "id": 2936,
- "tag": "BioModels"
- },
- {
- "id": 4181,
- "tag": "BioModels:BIOMD0000000713"
- },
- {
- "id": 4182,
- "tag": "Hepacivirus C"
- },
- {
- "id": 3002,
- "tag": "Homo sapiens"
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- {
- "id": 704,
- "tag": "SBML"
- }
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- "timestamp_created": "2025-01-30 14:03:27.154363+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000000713",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "3002": {
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- "content_types": "modeling",
- "content_types_list": [
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- "default_context": "7",
- "id": 3002,
- "name": "Reynolds2006 - Reduced model of the acute inflammatory response",
- "repository_type": "biomodels",
- "summary": "Angela Reynolds, Jonathan Rubin, Gilles Clermont, Judy Day, Yoram Vodovotz & G. Bard Ermentrout. A reduced mathematical model of the acute inflammatory response: I. Derivation of model and analysis of anti-inflammation. Journal of Theoretical Biology 242, 1 (2006).The acute inflammatory response, triggered by a variety of biological or physical stresses on an organism, is a delicate system of checks and balances that, although aimed at promoting healing and restoring homeostasis, can result in undesired and occasionally lethal physiological responses. In this work, we derive a reduced conceptual model for the acute inflammatory response to infection, built up from consideration of direct interactions of fundamental effectors. We harness this model to explore the importance of dynamic anti-inflammation in promoting resolution of infection and homeostasis. Further, we offer a clinical correlation between model predictions and potential therapeutic interventions based on modulation of immunity by anti-inflammatory agents.",
- "tags": [
- {
- "id": 2936,
- "tag": "BioModels"
- },
- {
- "id": 4183,
- "tag": "BioModels:BIOMD0000000714"
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- {
- "id": 3002,
- "tag": "Homo sapiens"
- },
- {
- "id": 704,
- "tag": "SBML"
- }
- ],
- "timestamp_created": "2025-01-30 14:03:27.638230+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000000714",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "3003": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "8",
- "id": 3003,
- "name": "Huo2017 - SEIS epidemic model with the impact of media",
- "repository_type": "biomodels",
- "summary": "Hai-Feng Huo, Peng Yang & Hong Xiang. Stability and bifurcation for an SEIS epidemic model with the impact of media. Physica A: Statistical Mechanics and its Applications 490 (2018).A novel SEIS epidemic model with the impact of media is introduced. By analyzing the characteristic equation of equilibrium, the basic reproduction number is obtained and the stability of the steady states is proved. The occurrence of a forward, backward and Hopf bifurcation is derived. Numerical simulations and sensitivity analysis are performed. Our results manifest that media can regard as a good indicator in controlling the emergence and spread of the epidemic disease.",
- "tags": [
- {
- "id": 2936,
- "tag": "BioModels"
- },
- {
- "id": 4184,
- "tag": "BioModels:BIOMD0000000715"
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- {
- "id": 3002,
- "tag": "Homo sapiens"
- },
- {
- "id": 704,
- "tag": "SBML"
- }
- ],
- "timestamp_created": "2025-01-30 14:03:28.144591+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000000715",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "3004": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "8",
- "id": 3004,
- "name": "Lee2018 - Avian human bilinear incidence (BI) model",
- "repository_type": "biomodels",
- "summary": "Hanl Lee & Angelyn Lao. Transmission dynamics and control strategies assessment of avian influenza A (H5N6) in the Philippines. Infectious Disease Modelling 3 (2018).Due to the outbreaks of Highly Pathogenic Avian Influenza A (HPAI) H5N6 in the Philippines (particularly in Pampanga and Nueva Ecija) in August 2017, there has been an increase in the need to cull the domestic birds to control the spread of the infection. However, this control method poses a negative impact on the poultry industry. In addition, the pathogenicity and transmissibility of the H5N6 in both the birds and the humans remain largely unknown which call for the necessity to develop more strategic control methods for the virus. In this study, we constructed a mathematical model for the bilinear and half-saturated incidence to compare their corresponding effect on transmission dynamics of H5N6. The simulations of half-saturated incidence model were similar to what occurred during the H5N6 outbreak (2017) in the Philippines. Instead of culling the birds, we implemented other control strategies such as non-medicinal (personal protection and poultry isolation) and medicinal (poultry vaccination) ways to prevent, reduce, and control the rate of the H5N6 virus transmission. Among the proposed control strategies, we have shown that the poultry isolation strategy is still the most effective in reducing the infected birds.",
- "tags": [
- {
- "id": 4174,
- "tag": "Aves"
- },
- {
- "id": 2936,
- "tag": "BioModels"
- },
- {
- "id": 4185,
- "tag": "BioModels:BIOMD0000000716"
- },
- {
- "id": 4186,
- "tag": "H5N6 subtype"
- },
- {
- "id": 3002,
- "tag": "Homo sapiens"
- },
- {
- "id": 704,
- "tag": "SBML"
- }
- ],
- "timestamp_created": "2025-01-30 14:03:28.669148+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000000716",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3005": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "8",
- "id": 3005,
- "name": "Lee2018 - Avian human half-saturated incidence (HSI) model",
- "repository_type": "biomodels",
- "summary": "Hanl Lee & Angelyn Lao. Transmission dynamics and control strategies assessment of avian influenza A (H5N6) in the Philippines. Infectious Disease Modelling 3 (2018).Due to the outbreaks of Highly Pathogenic Avian Influenza A (HPAI) H5N6 in the Philippines (particularly in Pampanga and Nueva Ecija) in August 2017, there has been an increase in the need to cull the domestic birds to control the spread of the infection. However, this control method poses a negative impact on the poultry industry. In addition, the pathogenicity and transmissibility of the H5N6 in both the birds and the humans remain largely unknown which call for the necessity to develop more strategic control methods for the virus. In this study, we constructed a mathematical model for the bilinear and half-saturated incidence to compare their corresponding effect on transmission dynamics of H5N6. The simulations of half-saturated incidence model were similar to what occurred during the H5N6 outbreak (2017) in the Philippines. Instead of culling the birds, we implemented other control strategies such as non-medicinal (personal protection and poultry isolation) and medicinal (poultry vaccination) ways to prevent, reduce, and control the rate of the H5N6 virus transmission. Among the proposed control strategies, we have shown that the poultry isolation strategy is still the most effective in reducing the infected birds.",
- "tags": [
- {
- "id": 4174,
- "tag": "Aves"
- },
- {
- "id": 2936,
- "tag": "BioModels"
- },
- {
- "id": 4187,
- "tag": "BioModels:BIOMD0000000717"
- },
- {
- "id": 4186,
- "tag": "H5N6 subtype"
- },
- {
- "id": 3002,
- "tag": "Homo sapiens"
- },
- {
- "id": 704,
- "tag": "SBML"
- }
- ],
- "timestamp_created": "2025-01-30 14:03:29.158008+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000000717",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "3006": {
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- "default_context": "3",
- "id": 3006,
- "name": "Li2008 - Caulobacter Cell Cycle",
- "repository_type": "biomodels",
- "summary": "
This a model from the article: A Quantitative Study of the Division Cycle of Caulobacter crescentus Stalked Cells. Shenghua Li, Paul Brazhnik, Bruno Sobral, John J. Tyson PLoS Comput Biol 2008 Jan 25:4(1): e9 18225942 , Abstract: Progression of a cell through the division cycle is tightly controlled at different steps to ensure the integrity of genomereplication and partitioning to daughter cells. From published experimental evidence, we propose a molecularmechanism for control of the cell division cycle in Caulobacter crescentus. The mechanism, which is based on thesynthesis and degradation of three \u2018\u2018master regulator\u2019\u2019 proteins (CtrA, GcrA, and DnaA), is converted into a quantitativemodel, in order to study the temporal dynamics of these and other cell cycle proteins. The model accounts forimportant details of the physiology, biochemistry, and genetics of cell cycle control in stalked C. crescentus cell. Itreproduces protein time courses in wild-type cells, mimics correctly the phenotypes of many mutant strains, andpredicts the phenotypes of currently uncharacterized mutants. Since many of the proteins involved in regulating thecell cycle of C. crescentus are conserved among many genera of a-proteobacteria, the proposed mechanism may beapplicable to other species of importance in agriculture and medicine.
In summary, you are entitled to use this encoded model in absolutely any manner you deem suitable, verbatim, or with modification, alone or embedded it in a larger context, redistribute it, commercially or not, in a restricted way or not..
During the early development of Xenopus laevis embryos, the first mitotic cell cycle is long (\u223c85 min) and the subsequent 11 cycles are short (\u223c30 min) and clock-like. Here we address the question of how the Cdk1 cell cycle oscillator changes between these two modes of operation. We found that the change can be attributed to an alteration in the balance between Wee1/Myt1 and Cdc25. The change in balance converts a circuit that acts like a positive-plus-negative feedback oscillator, with spikes of Cdk1 activation, to one that acts like a negative-feedback-only oscillator, with a shorter period and smoothly varying Cdk1 activity. Shortening the first cycle, by treating embryos with the Wee1A/Myt1 inhibitor PD0166285, resulted in a dramatic reduction in embryo viability, and restoring the length of the first cycle in inhibitor-treated embryos with low doses of cycloheximide partially rescued viability. Computations with an experimentally parameterized mathematical model show that modest changes in the Wee1/Cdc25 ratio can account for the observed qualitative changes in the cell cycle. The high ratio in the first cycle allows the period to be long and tunable, and decreasing the ratio in the subsequent cycles allows the oscillator to run at a maximal speed. Thus, the embryo rewires its feedback regulation to meet two different developmental requirements during early development.
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- "timestamp_created": "2025-01-30 14:03:30.109818+00:00",
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- "name": "Yan2012 - Rb-E2F pathway dynamics with miR449",
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- "summary": "MiRNAs, which are a family of small non-coding RNAs, regulate a broad array of physiological and developmental processes. However, their regulatory roles have remained largely mysterious. E2F is a positive regulator of cell cycle progression and also a potent inducer of apoptosis. Positive feedback loops in the regulation of Rb-E2F pathway are predicted and shown experimentally. Recently, it has been discovered that E2F induce a cluster of miRNAs called miR449. In turn, E2F is inhibited by miR449 through regulating different transcripts, thus forming negative feedback loops in the interaction network. Here, based on the integration of experimental evidence and quantitative data, we studied Rb-E2F pathway coupling the positive feedback loops and negative feedback loops mediated by miR449. Therefore, a mathematical model is constructed based in part on the model proposed in Yao-Lee et al. (2008) and nonlinear dynamical behaviors including the stability and bifurcations of the model are discussed.",
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- "name": "Graham2013 - Role of osteocytes in targeted bone remodeling",
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- "summary": "Jason M. Graham, Bruce P. Ayati, Sarah A. Holstein & James A. Martin. The role of osteocytes in targeted bone remodeling: a mathematical model. PLoS ONE 8, 5 (2013).Until recently many studies of bone remodeling at the cellular level have focused on the behavior of mature osteoblasts and osteoclasts, and their respective precursor cells, with the role of osteocytes and bone lining cells left largely unexplored. This is particularly true with respect to the mathematical modeling of bone remodeling. However, there is increasing evidence that osteocytes play important roles in the cycle of targeted bone remodeling, in serving as a significant source of RANKL to support osteoclastogenesis, and in secreting the bone formation inhibitor sclerostin. Moreover, there is also increasing interest in sclerostin, an osteocyte-secreted bone formation inhibitor, and its role in regulating local response to changes in the bone microenvironment. Here we develop a cell population model of bone remodeling that includes the role of osteocytes, sclerostin, and allows for the possibility of RANKL expression by osteocyte cell populations. We have aimed to give a simple, yet still tractable, model that remains faithful to the underlying system based on the known literature. This model extends and complements many of the existing mathematical models for bone remodeling, but can be used to explore aspects of the process of bone remodeling that were previously beyond the scope of prior modeling work. Through numerical simulations we demonstrate that our model can be used to explore theoretically many of the qualitative features of the role of osteocytes in bone biology as presented in recent literature.",
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- "id": 4192,
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- "tag": "Homo sapiens"
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- "timestamp_created": "2025-01-30 14:03:31.171495+00:00",
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- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000000721",
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- "name": "Bianchi2015 -Model for lymphangiogenesis in normal and diabetic wounds",
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- "summary": "Arianna Bianchi, Kevin J. Painter & Jonathan A. Sherratt. A mathematical model for lymphangiogenesis in normal and diabetic wounds. Journal of Theoretical Biology 383 (2015).Several studies suggest that one possible cause of impaired wound healing is failed or insufficient lymphangiogenesis, that is the formation of new lymphatic capillaries. Although many mathematical models have been developed to describe the formation of blood capillaries (angiogenesis) very few have been proposed for the regeneration of the lymphatic network. Moreover, lymphangiogenesis is markedly distinct from angiogenesis, occurring at different times and in a different manner. Here a model of five ordinary differential equations is presented to describe the formation of lymphatic capillaries following a skin wound. The variables represent different cell densities and growth factor concentrations, and where possible the parameters are estimated from experimental and clinical data. The system is then solved numerically and the results are compared with the available biological literature. Finally, a parameter sensitivity analysis of the model is taken as a starting point for suggesting new therapeutic approaches targeting the enhancement of lymphangiogenesis in diabetic wounds. The work provides a deeper understanding of the phenomenon in question, clarifying the main factors involved. In particular, the balance between TGF-\u03b2 and VEGF levels, rather than their absolute values, is identified as crucial to effective lymphangiogenesis. In addition, the results indicate lowering the macrophage-mediated activation of TGF-\u03b2 and increasing the basal lymphatic endothelial cell growth rate, inter alia, as potential treatments. It is hoped the findings of this paper may be considered in the development of future experiments investigating novel lymphangiogenic therapies.",
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- "id": 4193,
- "tag": "BioModels:BIOMD0000000722"
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- "id": 3090,
- "tag": "Mus musculus"
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- "id": 3073,
- "tag": "Rattus norvegicus"
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- "timestamp_created": "2025-01-30 14:03:31.684492+00:00",
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- "name": "Weis2014 - Data driven Mammalian Cell Cycle Model",
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This a model from the article: A Data-Driven, Mathematical Model of Mammalian Cell Cycle Regulation. Michael C. Weis, Jayant Avva, James W. Jacobberger, Sree N. Sreenath PLoS ONE 2014 May 13: 9(5): e97130 24824602 , Abstract: Progression of a cell through the division cycle is tightly controlled at different steps to ensure the integrity of genomereplication and partitioning to daughter cells. From published experimental evidence, we propose a molecularmechanism for control of the cell division cycle in Caulobacter crescentus. The mechanism, which is based on thesynthesis and degradation of three \u2018\u2018master regulator\u2019\u2019 proteins (CtrA, GcrA, and DnaA), is converted into a quantitativemodel, in order to study the temporal dynamics of these and other cell cycle proteins. The model accounts forimportant details of the physiology, biochemistry, and genetics of cell cycle control in stalked C. crescentus cell. Itreproduces protein time courses in wild-type cells, mimics correctly the phenotypes of many mutant strains, andpredicts the phenotypes of currently uncharacterized mutants. Since many of the proteins involved in regulating thecell cycle of C. crescentus are conserved among many genera of a-proteobacteria, the proposed mechanism may beapplicable to other species of importance in agriculture and medicine.
In summary, you are entitled to use this encoded model in absolutely any manner you deem suitable, verbatim, or with modification, alone or embedded it in a larger context, redistribute it, commercially or not, in a restricted way or not..
Its a Deterministic ODE model showcasing mechanism of PDL1 induced TCR and CD38 signalling inhibition. The model also contains the LCK activation and inactivation phenomenon dependent on the particular phosphorylation site. This model is relevant in immunotherapy.
The metabolic biochemistry of folate biosynthesis and utilisation has evolved into a complex network of reactions. Although this complexity represents challenges to the field of folate research it has also provided a renewed source for antimetabolite targets. A range of improved folate chemotherapy continues to be developed and applied particularly to cancer and chronic inflammatory diseases. However, new or better antifolates against infectious diseases remain much more elusive. In this paper we describe the assembly of a generic deterministic mathematical model of microbial folate metabolism. Our aim is to explore how a mathematical model could be used to explore the dynamics of this inherently complex set of biochemical reactions. Using the model it was found that: (1) a particular small set of folate intermediates are overrepresented, (2) inhibitory profiles can be quantified by the level of key folate products, (3) using the model to scan for the most effective combinatorial inhibitions of folate enzymes we identified specific targets which could complement current antifolates, and (4) the model substantiates the case for a substrate cycle in the folinic acid biosynthesis reaction. Our model is coded in the systems biology markup language and has been deposited in the BioModels Database (MODEL1511020000), this makes it accessible to the community as a whole.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
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- "timestamp_created": "2025-01-30 14:03:33.201617+00:00",
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- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000000725",
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- "name": "Ruan2017 - Transmission dynamics and control of rabies in China",
- "repository_type": "biomodels",
- "summary": "Shigui Ruan. Modeling the transmission dynamics and control of rabies in China. Mathematical Biosciences 286 (2017).Human rabies was first recorded in ancient China in about 556 BC and is still one of the major public-health problems in China. From 1950 to 2015, 130,494 human rabies cases were reported in Mainland China with an average of 1977 cases per year. It is estimated that 95% of these human rabies cases are due to dog bites. The purpose of this article is to provide a review about the models, results, and simulations that we have obtained recently on studying the transmission of rabies in China. We first construct a basic susceptible, exposed, infectious, and recovered (SEIR) type model for the spread of rabies virus among dogs and from dogs to humans and use the model to simulate the human rabies data in China from 1996 to 2010. Then we modify the basic model by including both domestic and stray dogs and apply the model to simulate the human rabies data from Guangdong Province, China. To study the seasonality of rabies, in Section\u00a04 we further propose a SEIR model with periodic transmission rates and employ the model to simulate the monthly data of human rabies cases reported by the Chinese Ministry of Health from January 2004 to December 2010. To understand the spatial spread of rabies, in Section\u00a05 we add diffusion to the dog population in the basic SEIR model to obtain a reaction-diffusion equation model and determine the minimum wave speed connecting the disease-free equilibrium to the endemic equilibrium. Finally, in order to investigate how the movement of dogs affects the geographically inter-provincial spread of rabies in Mainland China, in Section\u00a06 we propose a multi-patch model to describe the transmission dynamics of rabies between dogs and humans and use the two-patch submodel to investigate the rabies virus clades lineages and to simulate the human rabies data from Guizhou and Guangxi, Hebei and Fujian, and Sichuan and Shaanxi, respectively. Some discussions are provided in Section\u00a07.",
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- "tag": "Canis lupus familiaris"
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- "id": 4199,
- "tag": "Rabies lyssavirus"
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- "timestamp_created": "2025-01-30 14:03:33.725711+00:00",
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- "name": "Li2009- Assymetric Caulobacter cell cycle",
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The asymmetric cell division cycle of Caulobacter crescentus is orchestrated by an elaborate gene-protein regulatory network, centered on three major control proteins, DnaA, GcrA and CtrA. The regulatory network is cast into a quantitative computational model to investigate in a systematic fashion how these three proteins control the relevant genetic, biochemical and physiological properties of proliferating bacteria. Different controls for both swarmer and stalked cell cycles are represented in the mathematical scheme. The model is validated against observed phenotypes of wild-type cells and relevant mutants, and it predicts the phenotypes of novel mutants and of known mutants under novel experimental conditions. Because the cell cycle control proteins of Caulobacter are conserved across many species of alpha-proteobacteria, the model we are proposing here may be applicable to other genera of importance to agriculture and medicine
A mathematical model of cell cycle progression is presented, which integrates recent biochemical information on the interaction of the maturation promotion factor (MPF) and cyclin. The model retrieves the dynamics observed in early embryos and explains how multiple cycles of MPF activity can be produced and how the internal clock that determines durations and number of cycles can be adjusted by modulating the rate of change in MPF or cyclin concentrations. Experiments are suggested for verifying the role of MPF activity in determining the length of the somatic cell cycle.
We consider a minimal cascade model previously proposed for the mitotic oscillator driving the embryonic cell division cycle. The model is based on a bicyclic phosphorylation-dephosphorylation cascade involving cyclin and cdc2 kinase. By constructing stability diagrams showing domains of periodic behavior as a function of the maximum rates of the kinases and phosphatases involved in the two cycles of the cascade, we investigate the role of these converter enzymes in the oscillatory mechanism. Oscillations occur when the balance of kinase and phosphatase rates in each cycle is in a range bounded by two critical values. The results suggest ways to arrest the mitotic oscillator by altering the maximum rates of the converter enzymes. These results bear on the control of cell proliferation.
We propose an integrated computational model for the network of cyclin-dependent kinases (Cdks) that controls the dynamics of the mammalian cell cycle. The model contains four Cdk modules regulated by reversible phosphorylation, Cdk inhibitors, and protein synthesis or degradation. Growth factors (GFs) trigger the transition from a quiescent, stable steady state to self-sustained oscillations in the Cdk network. These oscillations correspond to the repetitive, transient activation of cyclin D/Cdk4-6 in G(1), cyclin E/Cdk2 at the G(1)/S transition, cyclin A/Cdk2 in S and at the S/G(2) transition, and cyclin B/Cdk1 at the G(2)/M transition. The model accounts for the following major properties of the mammalian cell cycle: (i) repetitive cell cycling in the presence of suprathreshold amounts of GF; (ii) control of cell-cycle progression by the balance between antagonistic effects of the tumor suppressor retinoblastoma protein (pRB) and the transcription factor E2F; and (iii) existence of a restriction point in G(1), beyond which completion of the cell cycle becomes independent of GF. The model also accounts for endoreplication. Incorporating the DNA replication checkpoint mediated by kinases ATR and Chk1 slows down the dynamics of the cell cycle without altering its oscillatory nature and leads to better separation of the S and M phases. The model for the mammalian cell cycle shows how the regulatory structure of the Cdk network results in its temporal self-organization, leading to the repetitive, sequential activation of the four Cdk modules that brings about the orderly progression along cell-cycle phases.
Its a mathematical model presenting the interaction between a growing tumor and immune system. Model involves tumor cells, dendritic cell, helper Tcells, regulatory Tcells, effector cells and certain cytokines (e.g. TGFbeta, IL10, IL2 ) produced by these cells. It represent a dynamic regulation of tumor production/killing by different immune cells and cytokines.
This a model from the article: Modeling immunotherapy of the tumor-immune interaction. Kirschner D, Panetta JC. J Math Biol 1998 Sep;37(3):235-52 9785481 , Abstract: A number of lines of evidence suggest that immunotherapy with the cytokineinterleukin-2 (IL-2) may boost the immune system to fight tumors. CD4+ T cells,the cells that orchestrate the immune response, use these cytokines as signalingmechanisms for immune-response stimulation as well as lymphocyte stimulation,growth, and differentiation. Because tumor cells begin as 'self', the immunesystem may not respond in an effective way to eradicate them. Adoptive cellularimmunotherapy can potentially restore or enhance these effects. We illustratethrough mathematical modeling the dynamics between tumor cells, immune-effectorcells, and IL-2. These efforts are able to explain both short tumor oscillationsin tumor sizes as well as long-term tumor relapse. We then explore the effectsof adoptive cellular immunotherapy on the model and describe under whatcircumstances the tumor can be eliminated.
This model was taken from the CellML repository and automatically converted to SBML. The original model was: Kirschner D, Panetta JC. (1998) - version=1.0 The original CellML model was created by: Catherine Lloyd c.lloyd@auckland.ac.nz The University of Auckland
This model originates from BioModels Database: A Database of Annotated Published Models (http://www.ebi.ac.uk/biomodels/). It is copyright (c) 2005-2011 The BioModels.net Team. To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
In summary, you are entitled to use this encoded model in absolutely any manner you deem suitable, verbatim, or with modification, alone or embedded it in a larger context, redistribute it, commercially or not, in a restricted way or not..
Dynamic model of iron distribution in mice. This model attempts to fit the radioiron tracer data from Lopes et al. 2010 for mice fed iron deficient and rich diets by adjusting the rate of iron intake (vDiet) and the hepcidin synthesis rate (vhepcidin) independently for each experiment. All other parameters are those that provide the best fit for the adequate diet.
This model includes the radioiron tracer species.
Differences in parameter values between deficient, rich, and adequate diets:
Dynamic model of iron distribution in mice. This model includes normal iron and radioactive labelled tracer iron species and was used for parameter estimation given the data from Lopes et al. 2010 for mice fed an adequate iron diet.
Dynamic model of iron distribution in mice. This model includes only normal iron with the parameters that fit the data from Lopes et al. 2010 for mice fed an adequate iron diet.
This model does not include the radioiron tracer species. It is appropriate to study the properties in conditions where no tracers are used (for example for steady state analysis).
Dynamic model of iron distribution in mice. This model includes only normal iron with the parameters that fit the data from Lopes et al. 2010 for mice fed a deficient iron diet.
This model does not include the radioiron tracer species. It is appropriate to study the properties in conditions where no tracers are used (for example for steady state analysis).
Dynamic model of iron distribution in mice. This model includes only normal iron with the parameters that fit the data from Lopes et al. 2010 for mice fed a rich iron diet.
This model does not include the radioiron tracer species. It is appropriate to study the properties in conditions where no tracers are used (for example for steady state analysis).
The paper describes a model on the detection of cancer based on cancer and immune biomarkers. Created by COPASI 4.25 (Build 207) This model is described in the article: Improving cancer detection through combinations of cancer and immune biomarkers: a modelling approach Raluca Eftimie and and Esraa Hassanein J Transl Med (2018) 16:73 Abstract: Background: Early cancer diagnosis is one of the most important challenges of cancer research, since in many can- cers it can lead to cure for patients with early stage diseases. For epithelial ovarian cancer (which is the leading cause of death among gynaecologic malignancies) the classical detection approach is based on measurements of CA-125 biomarker. However, the poor sensitivity and specificity of this biomarker impacts the detection of early-stage cancers. Methods: Here we use a computational approach to investigate the effect of combining multiple biomarkers for ovarian cancer (e.g., CA-125 and IL-7), to improve early cancer detection. Results: We show that this combined biomarkers approach could lead indeed to earlier cancer detection. However, the immune response (which influences the level of secreted IL-7 biomarker) plays an important role in improving and/or delaying cancer detection. Moreover, the detection level of IL-7 immune biomarker could be in a range that would not allow to distinguish between a healthy state and a cancerous state. In this case, the construction of solu- tion diagrams in the space generated by the IL-7 and CA-125 biomarkers could allow us predict the long-term evolu- tion of cancer biomarkers, thus allowing us to make predictions on cancer detection times. Conclusions: Combining cancer and immune biomarkers could improve cancer detection times, and any predic- tions that could be made (at least through the use of CA-125/IL-7 biomarkers) are patient specific. Keywords: Ovarian cancer, Mathematical model, CA-125 biomarker, IL-7 biomarker, Cancer detection times This model is hosted on BioModels Database and identified by: MODEL1907050002. To cite BioModels Database, please use: BioModels Database: An enhanced, curated and annotated resource for published quantitative kinetic models. To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
The paper describes a basic model of immune-tumor cell interactions. Created by COPASI 4.25 (Build 207) This model is described in the article: Cancer-Induced Immunosuppression can enable Effectiveness of Immunotherapy through Bistability Generation: a mathematical and computational Examination Victor Garcia, Sebastian Bonhoeffer and Feng Fu bioRxiv, 2018 Abstract: Cancer immunotherapies rely on how interactions between cancer and immune system cells are constituted. The more essential to the emergence of the dynamical behavior of cancer growth these are, the more effectively they may be used as mechanisms for interventions. Mathematical modeling can help unearth such connections, and help explain how they shape the dynamics of cancer growth. Here, we explored whether there exist simple, consistent properties of cancer-immune system interaction (CISI) models that might be harnessed to devise effective immunotherapy approaches. We did this for a family of three related models of increasing complexity. To this end, we developed a base model of CISI, which captures some essential features of the more complex models built on it. We find that the base model and its derivates can reproduce biologically plausible behavior. This behavior is consistent with situations in which the suppressive effects exerted by cancer cells on immune cells dominate their proliferative effects. Under these circumstances, the model family may display a pattern of bistability, where two distinct, stable states (a cancer-free, and a full-grown cancer state) are possible, consistent with the notion of an immunological barrier. Increasing the effectiveness of immune-caused cancer cell killing may remove the basis for bistability, and abruptly tip the dynamics of the system into cancer-free state. In combination with the administration of immune effector cells, modifications in cancer cell killing may also be harnessed for immunotherapy without resolving the bistability. We use these ideas to test immunotherapeutic interventions in silico in a stochastic version of the base model. This bistability-reliant approach to cancer interventions might offer advantages over those that comprise gradual declines in cancer cell numbers. This model is hosted on BioModels Database and identified by: MODEL1907050005. To cite BioModels Database, please use: BioModels Database: An enhanced, curated and annotated resource for published quantitative kinetic models . To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
The paper describes a model on the key components for tumor\u2013immune dynamics in multiple myeloma.Created by COPASI 4.25 (Build 207)This model is described in the article:Methods for determining key components in a mathematical model for tumor\u2013immune dynamics in multiple myelomaJill Gallaher, Kamila Larripa, Marissa Renardy, Blerta Shtylla, Nessy Tania, Diana White, Karen Wood, Li Zhu, Chaitali Passey, Michael Robbins, Natalie Bezman, Suresh Shelat, Hearn Jay Choo, Helen MooreJournal of Theoretical Biology 458 (2018) 31\u201346Abstract:In this work, we analyze a mathematical model we introduced previously for the dynamics of multiple myeloma and the immune system. We focus on four main aspects: (1) obtaining and justifying ranges and values for all parameters in the model; (2) determining a subset of parameters to which the model is most sensitive; (3) determining which parameters in this subset can be uniquely estimated given cer- tain types of data; and (4) exploring the model numerically. Using global sensitivity analysis techniques, we found that the model is most sensitive to certain growth, loss, and efficacy parameters. This anal- ysis provides the foundation for a future application of the model: prediction of optimal combination regimens in patients with multiple myeloma.This model is hosted on BioModels Database and identified by: MODEL1907050001To cite BioModels Database, please use: BioModels Database: An enhanced, curated and annotated resource for published quantitative kinetic models .To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
The paper describes a model on the size of pancreatic tumour. Created by COPASI 4.25 (Build 207) This model is described in the article: Modeling Pancreatic Cancer Dynamics with Immunotherapy Xiaochuan Hu, Guoyi Ke and Sophia R.-J. Jang Bulletin of Mathematical Biology (2019) 81:1885\u20131915 Abstract: We develop a mathematical model of pancreatic cancer that includes pancreatic cancer cells, pancreatic stellate cells, effector cells and tumor-promoting and tumor- suppressing cytokines to investigate the effects of immunotherapies on patient survival. The model is first validated using the survival data of two clinical trials. Local sen- sitivity analysis of the parameters indicates there exists a critical activation rate of pro-tumor cytokines beyond which the cancer can be eradicated if four adoptive trans- fers of immune cells are applied. Optimal control theory is explored as a potential tool for searching the best adoptive cellular immunotherapies. Combined immunother- apies between adoptive ex vivo expanded immune cells and TGF-\u03b2 inhibition by siRNA treatments are investigated. This study concludes that mono-immunotherapy is unlikely to control the pancreatic cancer and combined immunotherapies between anti-TGF-\u03b2 and adoptive transfers of immune cells can prolong patient survival. We show through numerical explorations that how these two types of immunotherapies are scheduled is important to survival. Applying TGF-\u03b2 inhibition first followed by adoptive immune cell transfers can yield better survival outcomes. This model is hosted on BioModels Database and identified by: MODEL1907050003. To cite BioModels Database, please use: BioModels Database: An enhanced, curated and annotated resource for published quantitative kinetic models . To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
The paper describes a model on the trastuzumab-induced immune response in murine(mouse) HER2+ breast cancer.Created by COPASI 4.25 (Build 207) This model is described in the article: Mathematical modelling of trastuzumab-induced immune response in an in vivo murine model of HER2+ breast cancer Angela M. Jarrett, Meghan J. Bloom, Wesley Godfrey, Anum K. Syed, David A. Ekrut, Lauren I. Ehrlich, Thomas E. Yankeelov, Anna G. Sorace Mathematical Medicine and Biology: A Journal of the IMA (2018) 00, 1\u201330 Abstract: The goal of this study is to develop an integrated, mathematical\u2013experimental approach for understanding the interactions between the immune system and the effects of trastuzumab on breast cancer that overexpresses the human epidermal growth factor receptor 2 (HER2+). A system of coupled, ordinary differential equations was constructed to describe the temporal changes in tumour growth, along with intratumoural changes in the immune response, vascularity, necrosis and hypoxia. The mathematical model is calibrated with serially acquired experimental data of tumour volume, vascularity, necrosis and hypoxia obtained from either imaging or histology from a murine model of HER2+ breast cancer. Sensitivity analysis shows that model components are sensitive for 12 of 13 parameters, but accounting for uncertainty in the parameter values, model simulations still agree with the experimental data. Given theinitial conditions, the mathematical model predicts an increase in the immune infiltrates over time in the treated animals. Immunofluorescent staining results are presented that validate this prediction by showing an increased co-staining of CD11c and F4/80 (proteins expressed by dendritic cells and/or macrophages) in the total tissue for the treated tumours compared to the controls. We posit that the proposed mathematical\u2013experimental approach can be used to elucidate driving interactions between the trastuzumab-induced responses in the tumour and the immune system that drive the stabilization of vasculature while simultaneously decreasing tumour growth\u2014conclusions revealed by the mathematical model that were not deducible from the experimental data alone. This model is hosted on BioModels Database and identified by: MODEL1907050004. To cite BioModels Database, please use: BioModels Database: An enhanced, curated and annotated resource for published quantitative kinetic models . To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
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- "summary": "The paper describes a model on the Dynamics of Immune Checkpoints, Immune System, and BCG in the Treatment of Superficial Bladder Cancer. Created by COPASI 4.25 (Build 207) This model is described in the article: Dynamics of Immune Checkpoints, Immune System, and BCG in the Treatment of Superficial Bladder CancerFarouk Tijjani Saad, Evren Hincal, and Bilgen KaymakamzadeComputational and Mathematical Methods in Medicine, vol. 2017, no. 3573082Abstract: This paper aims to study the dynamics of immune suppressors/checkpoints, immune system, and BCG in the treatment of superficial bladder cancer. Programmed cell death protein-1 (PD-1), cytotoxic T-lymphocyte-associated antigen 4 (CTLA4), and transforming growth factor-beta (TGF-b) are some of the examples of immune suppressors/checkpoints. They are responsible for deactivating the immune system and enhancing immunological tolerance. Moreover, they categorically downregulate and suppress the immune system by preventing and blocking the activation of T-cells, which in turn decreases autoimmunity and enhances self- tolerance. In cancer immunotherapy, the immune checkpoints/suppressors prevent and block the immune cells from attacking, spreading, and killing the cancer cells, which leads to cancer growth and development. We formulate a mathematical model that studies three possible dynamics of the treatment and establish the effects of the immune checkpoints on the immune system and the treatment at large. Although the effect cannot be seen explicitly in the analysis of the model, we show it by numerical simulations.This model is hosted on BioModels Database and identified by: MODEL1907100001.To cite BioModels Database, please use: BioModels Database: An enhanced, curated and annotated resource for published quantitative kinetic models. To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.",
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- "name": "Phan2017 - innate immune in oncolytic virotherapy",
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- "summary": "The paper describes a model on the key components for tumor\u2013immune dynamics in multiple myeloma. Created by COPASI 4.25 (Build 207) This model is described in the article: The Role of the Innate Immune System in Oncolytic Virotherapy Tuan Anh Phan and Jianjun Paul TianComputational and Mathematical Methods in Medicine (2017) 6587258Abstract: The complexity of the immune responses is a major challenge in current virotherapy. This study incorporates the innate immune response into our basic model for virotherapy and investigates how the innate immunity affects the outcome of virotherapy. The viral therapeutic dynamics is largely determined by the viral burst size, relative innate immune killing rate, and relative innate immunity decay rate. The innate immunity may complicate virotherapy in the way of creating more equilibria when the viral burst size is not too big, while the dynamics is similar to the system without innate immunity when the viral burst size is big.To cite BioModels Database, please use: BioModels Database: An enhanced, curated and annotated resource for published quantitative kinetic models . To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.",
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- "timestamp_created": "2025-01-30 14:03:45.067596+00:00",
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- "name": "Reppas2015 - tumor control via alternating immunostimulating and immunosuppressive phases",
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- "summary": "The paper describes a model of tumor control via alternating immunostimulating and immunosuppressive phases. Created by COPASI 4.25 (Build 207) This model is described in the article: In silico tumor control induced via alternating immunostimulating and immunosuppressive phasesAI Reppas, JCL Alfonso, and H HatzikirouVirulence 7:2, 174--186Abstract: Despite recent advances in the field of Oncoimmunology, the success potential of immunomodulatory therapies against cancer remains to be elucidated. One of the reasons is the lack of understanding on the complex interplay between tumor growth dynamics and the associated immune system responses. Toward this goal, we consider a mathematical model of vascularized tumor growth and the corresponding effector cell recruitment dynamics. Bifurcation analysis allows for the exploration of model\u2019s dynamic behavior and the determination of these parameter regimes that result in immune-mediated tumor control. In this work, we focus on a particular tumor evasion regime that involves tumor and effector cell concentration oscillations of slowly increasing and decreasing amplitude, respectively. Considering a temporal multiscale analysis, we derive an analytically tractable mapping of model solutions onto a weakly negatively damped harmonic oscillator. Based on our analysis, we propose a theory-driven intervention strategy involving immunostimulating and immunosuppressive phases to induce long-term tumor control.To cite BioModels Database, please use: BioModels Database: An enhanced, curated and annotated resource for published quantitative kinetic models . To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.",
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- "name": "Lolas2016 - tumour-induced neoneurogenesis and perineural tumour growth",
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- "summary": "The paper describes a model of tumour-induced neoneurogenesis and perineural tumour growth. Created by COPASI 4.25 (Build 207) This model is described in the article: Tumour-induced neoneurogenesis and perineural tumour growth: a mathematical approachGeorgios Lolas, Arianna Bianchi and Konstantinos N. SyrigosScientific Reports 6:20684Abstract:It is well-known that tumours induce the formation of a lymphatic and a blood vasculature around themselves. A similar but far less studied process occurs in relation to the nervous system and is referred to as neoneurogenesis. The relationship between tumour progression and the nervous system is still poorly understood and is likely to involve a multitude of factors. It is therefore relevant to study tumour-nerve interactions through mathematical modelling: this may reveal the most significant factors of the plethora of interacting elements regulating neoneurogenesis. The present work is a first attempt to model the neurobiological aspect of cancer development through a system of differential equations. The model confirms the experimental observations that a tumour is able to promote nerve formation/elongation around itself, and that high levels of nerve growth factor and axon guidance molecules are recorded in the presence of a tumour. Our results also reflect the observation that high stress levels (represented by higher norepinephrine release by sympathetic nerves) contribute to tumour development and spread, indicating a mutually beneficial relationship between tumour cells and neurons. The model predictions suggest novel therapeutic strategies, aimed at blocking the stress effects on tumour growth and dissemination.To cite BioModels Database, please use: BioModels Database: An enhanced, curated and annotated resource for published quantitative kinetic models . To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.",
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- "summary": "The paper describes a basic model of immune-induced cancer dormancy and immune evasion. Created by COPASI 4.25 (Build 207) This model is described in the article: Mathematical models of immune-induced cancer dormancy and the emergence of immune evasionKathleen P. Wilkie and Philip HahnfeldtInterface Focus 3: 20130010Abstract: Cancer dormancy, a state in which cancer cells persist in a host without sig- nificant growth, is a natural forestallment of progression to manifest disease and is thus of great clinical interest. Experimental work in mice suggests that in immune-induced dormancy, the longer a cancer remains dormant in a host, the more resistant the cancer cells become to cytotoxic T-cell-mediated killing. In this work, mathematical models are used to analyse the possible causative mechanisms of cancer escape from immune-induced dormancy. Using a data-driven approach, both decaying efficacy in immune predation and immune recruitment are analysed with results suggesting that decline in recruitment is a stronger determinant of escape than increased resistance to predation. Using a mechanistic approach, the existence of an immune- resistant cancer cell subpopulation is considered, and the effects on cancer dormancy and potential immunoediting mechanisms of cancer escape are analysed and discussed. The immunoediting mechanism assumes that the immune system selectively prunes the cancer of immune-sensitive cells, which is shown to cause an initially heterogeneous population to become a more homogeneous, and more resistant, population. The fact that this selec- tion may result in the appearance of decreasing efficacy in T-cell cytotoxic effect with time in dormancy is also demonstrated. This work suggests that through actions that temporarily delay cancer growth through the targeted removal of immune-sensitive subpopulations, the immune response may actually progress the cancer to a more aggressive state.To cite BioModels Database, please use: BioModels Database: An enhanced, curated and annotated resource for published quantitative kinetic models . To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide.Please refer to CC0 Public Domain Dedication for more information.",
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- "name": "Figueredo2013/1 - immunointeraction base model",
- "repository_type": "biomodels",
- "summary": "The paper describes a basic model of immune-itumor interaction.Created by COPASI 4.25 (Build 207) This model is described in the article: Investigating mathematical models of immuno-interactions with early-stage cancer under an agent-based modelling perspectiveGrazziela P Figueredo, Peer-Olaf Siebers, Uwe Aickelin Kathleen BMC Bioinformatics 2013, 14(Suppl 6):S6Abstract: Many advances in research regarding immuno-interactions with cancer were developed with the help of ordinary differential equation (ODE) models. These models, however, are not effectively capable of representing problems involving individual localisation, memory and emerging properties, which are common characteristics of cells and molecules of the immune system. Agent-based modelling and simulation is an alternative paradigm to ODE models that overcomes these limitations. In this paper we investigate the potential contribution of agent-based modelling and simulation when compared to ODE modelling and simulation. We seek answers to the following questions: Is it possible to obtain an equivalent agent-based model from the ODE formulation? Do the outcomes differ? Are there any benefits of using one method compared to the other? To answer these questions, we have considered three case studies using established mathematical models of immune interactions with early-stage cancer. These case studies were re-conceptualised under an agent-based perspective and the simulation results were then compared with those from the ODE models. Our results show that it is possible to obtain equivalent agent-based models (i.e. implementing the same mechanisms); the simulation output of both types of models however might differ depending on the attributes of the system to be modelled. In some cases, additional insight from using agent-based modelling was obtained. Overall, we can confirm that agent-based modelling is a useful addition to the tool set of immunologists, as it has extra features that allow for simulations with characteristics that are closer to the biological phenomena.To cite BioModels Database, please use: BioModels Database: An enhanced, curated and annotated resource for published quantitative kinetic models . To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.",
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- {
- "id": 4230,
- "tag": "BioModels:BIOMD0000000753"
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- "tag": "Immune response to tumor cell"
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- "timestamp_created": "2025-01-30 14:03:47.808466+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000000753",
- "user": {
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- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
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- "id": 3042,
- "name": "Figueredo2013/2 - immunointeraction model with IL2",
- "repository_type": "biomodels",
- "summary": "The paper describes a model of immune-itumor interaction with IL2.Created by COPASI 4.25 (Build 207) This model is described in the article: Investigating mathematical models of immuno-interactions with early-stage cancer under an agent-based modelling perspectiveGrazziela P Figueredo, Peer-Olaf Siebers, Uwe Aickelin Kathleen BMC Bioinformatics 2013, 14(Suppl 6):S6Abstract: Many advances in research regarding immuno-interactions with cancer were developed with the help of ordinary differential equation (ODE) models. These models, however, are not effectively capable of representing problems involving individual localisation, memory and emerging properties, which are common characteristics of cells and molecules of the immune system. Agent-based modelling and simulation is an alternative paradigm to ODE models that overcomes these limitations. In this paper we investigate the potential contribution of agent-based modelling and simulation when compared to ODE modelling and simulation. We seek answers to the following questions: Is it possible to obtain an equivalent agent-based model from the ODE formulation? Do the outcomes differ? Are there any benefits of using one method compared to the other? To answer these questions, we have considered three case studies using established mathematical models of immune interactions with early-stage cancer. These case studies were re-conceptualised under an agent-based perspective and the simulation results were then compared with those from the ODE models. Our results show that it is possible to obtain equivalent agent-based models (i.e. implementing the same mechanisms); the simulation output of both types of models however might differ depending on the attributes of the system to be modelled. In some cases, additional insight from using agent-based modelling was obtained. Overall, we can confirm that agent-based modelling is a useful addition to the tool set of immunologists, as it has extra features that allow for simulations with characteristics that are closer to the biological phenomena.To cite BioModels Database, please use: BioModels Database: An enhanced, curated and annotated resource for published quantitative kinetic models . To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.",
- "tags": [
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- "id": 2936,
- "tag": "BioModels"
- },
- {
- "id": 4231,
- "tag": "BioModels:BIOMD0000000754"
- },
- {
- "id": 3002,
- "tag": "Homo sapiens"
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- {
- "id": 4105,
- "tag": "Immune response to tumor cell"
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- {
- "id": 704,
- "tag": "SBML"
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- ],
- "timestamp_created": "2025-01-30 14:03:48.311266+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000000754",
- "user": {
- "email": "info@opensourcebrain.org",
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- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
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- "default_context": "6",
- "id": 3043,
- "name": "Hansen2019 - Nine species reduced model of blood coagulation",
- "repository_type": "biomodels",
- "summary": "
its a nine species reduced model of Hockin 2002. Model uses different level of reduction (5,7,9,11) and testing the best alignment with Hockin model results
",
- "tags": [
- {
- "id": 2936,
- "tag": "BioModels"
- },
- {
- "id": 4232,
- "tag": "BioModels:BIOMD0000000755"
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- {
- "id": 3002,
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- "timestamp_created": "2025-01-30 14:03:48.801444+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000000755",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "3044": {
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- "default_context": "4",
- "id": 3044,
- "name": "Figueredo2013/3 - immunointeraction full model",
- "repository_type": "biomodels",
- "summary": "The paper describes a full model of immune-itumor interaction.Created by COPASI 4.25 (Build 207) This model is described in the article: Investigating mathematical models of immuno-interactions with early-stage cancer under an agent-based modelling perspectiveGrazziela P Figueredo, Peer-Olaf Siebers, Uwe Aickelin Kathleen BMC Bioinformatics 2013, 14(Suppl 6):S6Abstract: Many advances in research regarding immuno-interactions with cancer were developed with the help of ordinary differential equation (ODE) models. These models, however, are not effectively capable of representing problems involving individual localisation, memory and emerging properties, which are common characteristics of cells and molecules of the immune system. Agent-based modelling and simulation is an alternative paradigm to ODE models that overcomes these limitations. In this paper we investigate the potential contribution of agent-based modelling and simulation when compared to ODE modelling and simulation. We seek answers to the following questions: Is it possible to obtain an equivalent agent-based model from the ODE formulation? Do the outcomes differ? Are there any benefits of using one method compared to the other? To answer these questions, we have considered three case studies using established mathematical models of immune interactions with early-stage cancer. These case studies were re-conceptualised under an agent-based perspective and the simulation results were then compared with those from the ODE models. Our results show that it is possible to obtain equivalent agent-based models (i.e. implementing the same mechanisms); the simulation output of both types of models however might differ depending on the attributes of the system to be modelled. In some cases, additional insight from using agent-based modelling was obtained. Overall, we can confirm that agent-based modelling is a useful addition to the tool set of immunologists, as it has extra features that allow for simulations with characteristics that are closer to the biological phenomena.To cite BioModels Database, please use: BioModels Database: An enhanced, curated and annotated resource for published quantitative kinetic models . To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.",
- "tags": [
- {
- "id": 2936,
- "tag": "BioModels"
- },
- {
- "id": 4233,
- "tag": "BioModels:BIOMD0000000756"
- },
- {
- "id": 3002,
- "tag": "Homo sapiens"
- },
- {
- "id": 4105,
- "tag": "Immune response to tumor cell"
- },
- {
- "id": 704,
- "tag": "SBML"
- }
- ],
- "timestamp_created": "2025-01-30 14:03:49.311392+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000000756",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "3045": {
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- "id": 3045,
- "name": "Abernathy2016 - glioblastoma treatment",
- "repository_type": "biomodels",
- "summary": "The paper describes a model of glioblastoma. Created by COPASI 4.25 (Build 207) This model is described in the article: Modeling the Treatment of Glioblastoma Multiforme and Cancer Stem Cells with Ordinary Differential EquationsKristen Abernathy and Jeremy Burke BMC Computational and Mathematical Methods in Medicine Volume 2016, Article ID 1239861, 11 pagesAbstract: Despite improvements in cancer therapy and treatments, tumor recurrence is a common event in cancer patients. One explanation of recurrence is that cancer therapy focuses on treatment of tumor cells and does not eradicate cancer stem cells (CSCs). CSCs are postulated to behave similar to normal stem cells in that their role is to maintain homeostasis. That is, when the population of tumor cells is reduced or depleted by treatment, CSCs will repopulate the tumor, causing recurrence. In this paper, we study the application of the CSC Hypothesis to the treatment of glioblastoma multiforme by immunotherapy. We extend the work of Kogan et al. (2008) to incorporate the dynamics of CSCs, prove the existence of a recurrence state, and provide an analysis of possible cancerous states and their dependence on treatment levels.To cite BioModels Database, please use: BioModels Database: An enhanced, curated and annotated resource for published quantitative kinetic models . To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.",
- "tags": [
- {
- "id": 2936,
- "tag": "BioModels"
- },
- {
- "id": 4234,
- "tag": "BioModels:BIOMD0000000757"
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- {
- "id": 3002,
- "tag": "Homo sapiens"
- },
- {
- "id": 704,
- "tag": "SBML"
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- "timestamp_created": "2025-01-30 14:03:49.870945+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000000757",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "3046": {
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- "content_types": "modeling",
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- "modeling"
- ],
- "default_context": "4",
- "id": 3046,
- "name": "Babbs2012 - immunotherapy",
- "repository_type": "biomodels",
- "summary": "The paper describes a simple model of tumor immunotherapy. Created by COPASI 4.25 (Build 207) This model is described in the article: Predicting success or failure of immunotherapy for cancer: insights from a clinically applicable mathematical model Charles F BabbsAm J Cancer Res 2012;2(2):204-213Abstract: The objective of this study was to create a clinically applicable mathematical model of immunotherapy for cancer and use it to explore differences between successful and unsuccessful treatment scenarios. The simplified predator-prey model includes four lumped parameters: tumor growth rate, g; immune cell killing efficiency, k; immune cell signaling factor, \u03bb; and immune cell half-life decay, \u03bc. The predator-prey equations as functions of time, t, for nor- malized tumor cell numbers, y, (the prey) and immunocyte numbers, x, (the predators) are: dy/dt = gy \u2013 kx and dx/dt = \u03bbxy \u2013 \u03bcx. A parameter estimation procedure that capitalizes on available clinical data and the timing of clinically observable phenomena gives mid-range benchmarks for parameters representing the unstable equilibrium case in which the tumor neither grows nor shrinks. Departure from this equilibrium results in oscillations in tumor cell num- bers and in many cases complete elimination of the tumor. Several paradoxical phenomena are predicted, including increasing tumor cell numbers prior to a population crash, apparent cure with late recurrence, one or more cycles of tumor growth prior to eventual tumor elimination, and improved tumor killing with initially weaker immune parame- ters or smaller initial populations of immune cells. The model and the parameter estimation techniques are easily adapted to various human cancers that evoke an immune response. They may help clinicians understand and predict certain strange and unexpected effects in the world of tumor immunity and lead to the design of clinical trials to test improved treatment protocols for patients.To cite BioModels Database, please use: BioModels Database: An enhanced, curated and annotated resource for published quantitative kinetic models . To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.",
- "tags": [
- {
- "id": 2936,
- "tag": "BioModels"
- },
- {
- "id": 4235,
- "tag": "BioModels:BIOMD0000000758"
- },
- {
- "id": 3002,
- "tag": "Homo sapiens"
- },
- {
- "id": 704,
- "tag": "SBML"
- }
- ],
- "timestamp_created": "2025-01-30 14:03:50.636992+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000000758",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "3047": {
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- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "7",
- "id": 3047,
- "name": "Cappuccio2006 - Cancer immunotherapy by interleukin-21",
- "repository_type": "biomodels",
- "summary": "This model describes the effects of Il-21 on tumor eradication via natural killer cell-mediated and CD8+ T-cell-mediated lysis of tumor cells. The model demonstrates changes in growth dynamics in nonimmunogenic B16 melanoma and the immunogenic MethA and MCA205 fibrosarcomas, showing a strong dependence of the NK-cell/CD8+ T-cell balance on tumor immunogenicity.",
- "tags": [
- {
- "id": 2936,
- "tag": "BioModels"
- },
- {
- "id": 4236,
- "tag": "BioModels:BIOMD0000000761"
- },
- {
- "id": 3090,
- "tag": "Mus musculus"
- },
- {
- "id": 704,
- "tag": "SBML"
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- "timestamp_created": "2025-01-30 14:03:51.151776+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000000761",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "3048": {
- "auto_sync": true,
- "content_types": "modeling",
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- "modeling"
- ],
- "default_context": "8",
- "id": 3048,
- "name": "Kuznetsov1994 - Nonlinear dynamics of immunogenic tumors",
- "repository_type": "biomodels",
- "summary": "
This mathematical model describes the response of cytotoxic T lymphocytes to the growth of an immunogenic tumor, with the inclusion on a number of in vivo phenomena, such as the immunostimulation of tumor growth, evasion of immune function by the tumor, and the formation of a tumor \"dormant state\". Specifically, this model is used to describe the kinetics of growth and regression of the B-cell lymphoma BCL1 in the spleen of mice.
This model examines the role of helper and cytotoxic T cells in an anti-tumour response, with implicit inclusions of immunosuppressive effects. The model demonstrates the dependence of immunoediting on infilftration by helper and cytotoxic T cells, as well as the importance of these cells in mediating tumour elimination.
",
- "tags": [
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- "id": 2936,
- "tag": "BioModels"
- },
- {
- "id": 4240,
- "tag": "BioModels:BIOMD0000000763"
- },
- {
- "id": 4238,
- "tag": "Ordinary differential equation model"
- },
- {
- "id": 704,
- "tag": "SBML"
- },
- {
- "id": 4239,
- "tag": "T cell mediated immune response to tumor cell"
- }
- ],
- "timestamp_created": "2025-01-30 14:03:52.318810+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000000763",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "3050": {
- "auto_sync": true,
- "content_types": "modeling",
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- "modeling"
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- "default_context": "4",
- "id": 3050,
- "name": "Malinzi2019 - chemovirotherapy",
- "repository_type": "biomodels",
- "summary": "The paper describes a model of oncolytic virothherapy. Created by COPASI 4.25 (Build 207) This model is described in the article: Mathematical Analysis of a Mathematical Model of Chemovirotherapy: Effect of Drug Infusion Method Joseph Malinzi Computational and Mathematical Methods in Medicine Volume 2019, Article ID 7576591, 16 pages Abstract: IA mathematical model for the treatment of cancer using chemovirotherapy is developed with the aim of determining the efficacy of three drug infusion methods: constant, single bolus, and periodic treatments. The model is in the form of ODEs and is further extended into DDEs to account for delays as a result of the infection of tumor cells by the virus and chemotherapeutic drug responses. Analysis of the model is carried out for each of the three drug infusion methods. Analytic solutions are determined where possible and stability analysis of both steady state solutions for the ODEs and DDEs is presented. The results indicate that constant and periodic drug infusion methods are more efficient compared to a single bolus injection. Numerical simulations show that with a large virus burst size, irrespective of the drug infusion method, chemovirotherapy is highly effective compared to either treatments. The simulations further show that both delays increase the period within which a tumor can be cleared from body tissue.To cite BioModels Database, please use: BioModels Database: An enhanced, curated and annotated resource for published quantitative kinetic models . To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.",
- "tags": [
- {
- "id": 2936,
- "tag": "BioModels"
- },
- {
- "id": 4241,
- "tag": "BioModels:BIOMD0000000764"
- },
- {
- "id": 3002,
- "tag": "Homo sapiens"
- },
- {
- "id": 704,
- "tag": "SBML"
- }
- ],
- "timestamp_created": "2025-01-30 14:03:52.882205+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000000764",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "3051": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "4",
- "id": 3051,
- "name": "Macnamara2015/1 - virotherapy full model",
- "repository_type": "biomodels",
- "summary": "The paper describes a full model of oncolytic virotherapy. Created by COPASI 4.25 (Build 207) This model is described in the article: Memory versus effector immune responses in oncolytic virotherapiesCicely Macnamara, Raluca Eftimie Abstract: The main priority when designing cancer immuno-therapies has been to seek viable biological mechanisms that lead to permanent cancer eradica- tion or cancer control. Understanding the delicate balance between the role of effector and memory cells on eliminating cancer cells remains an elusive problem in immunology. Here we make an initial investigation into this problem with the help of a mathematical model for oncolytic virotherapy; although the model can in fact be made general enough to be applied also to other immunological problems. Our results show that long-term cancer con- trol is associated with a large number of persistent effector cells (irrespective of the initial peak in effector cell numbers). However, this large number of persistent effector cells is sustained by a relatively large number of memory cells. Moreover, we show that cancer control from a dormant state cannot be predicted by the size of the memory population.To cite BioModels Database, please use: BioModels Database: An enhanced, curated and annotated resource for published quantitative kinetic models . To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.",
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- "id": 2936,
- "tag": "BioModels"
- },
- {
- "id": 4242,
- "tag": "BioModels:BIOMD0000000766"
- },
- {
- "id": 3002,
- "tag": "Homo sapiens"
- },
- {
- "id": 704,
- "tag": "SBML"
- }
- ],
- "timestamp_created": "2025-01-30 14:03:53.384758+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000000766",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3052": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "4",
- "id": 3052,
- "name": "Macnamara2015/2 - virotherapy virus-free submodel",
- "repository_type": "biomodels",
- "summary": "The paper describes a submodel of oncolytic virotherapy. Created by COPASI 4.25 (Build 207) This model is described in the article: Memory versus effector immune responses in oncolytic virotherapiesCicely Macnamara, Raluca Eftimie Abstract: The main priority when designing cancer immuno-therapies has been to seek viable biological mechanisms that lead to permanent cancer eradica- tion or cancer control. Understanding the delicate balance between the role of effector and memory cells on eliminating cancer cells remains an elusive problem in immunology. Here we make an initial investigation into this problem with the help of a mathematical model for oncolytic virotherapy; although the model can in fact be made general enough to be applied also to other immunological problems. Our results show that long-term cancer con- trol is associated with a large number of persistent effector cells (irrespective of the initial peak in effector cell numbers). However, this large number of persistent effector cells is sustained by a relatively large number of memory cells. Moreover, we show that cancer control from a dormant state cannot be predicted by the size of the memory population.To cite BioModels Database, please use: BioModels Database: An enhanced, curated and annotated resource for published quantitative kinetic models . To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.",
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- "timestamp_created": "2025-01-30 14:03:53.948122+00:00",
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- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000000767",
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- "id": 3053,
- "name": "Eftimie2010 - immunity to melanoma",
- "repository_type": "biomodels",
- "summary": "The paper describes a model of immunity to melanoma. Created by COPASI 4.25 (Build 207) This model is described in the article: Modeling anti-tumor Th1 and Th2 immunity in the rejection of melanoma Raluca Eftimie, Jonathan L. Bramson, David J.D. Earn Journal of Theoretical Biology 265 (2010) 467\u2013480Abstract: Recent experiments indicate that CD4+ Th2 cells can reject skin tumors in mice, while CD4+ Th1 cells cannot (Mattes et al., 2003; Zhang et al., 2009). These results are surprising because CD4+ Th1 cells are typically considered to be capable of tumor rejection. We used mathematical models to investigate this unexpected outcome. We found that neither CD4+ Th1 nor CD4+ Th2 cells could eliminate the cancer cells when acting alone, but that tumor elimination could be induced by recruitment of eosinophils by the Th2 cells. These recruited eosinophils had unexpected indirect effects on the decay rate of type 2 cytokines and the rate at which Th2 cells are inactivated through interactions with cancer cells. Strikingly, the presence of eosinophils impacted tumor growth more significantly than the release of tumor-suppressing cytokines such as IFN-g and TNF-a. Our simulations suggest that novel strategies to enhance eosinophil recruitment into skin tumors may improve cancer immunotherapies. To cite BioModels Database, please use: BioModels Database: An enhanced, curated and annotated resource for published quantitative kinetic models . To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.",
- "tags": [
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- "tag": "BioModels"
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- "id": 4244,
- "tag": "BioModels:BIOMD0000000768"
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- "timestamp_created": "2025-01-30 14:03:54.454454+00:00",
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- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000000768",
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- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "id": 3054,
- "name": "Eftimie2017/2 - interaction of Th and macrophage in melanoma",
- "repository_type": "biomodels",
- "summary": "The paper describes a model of interaction of Th cells and macrophage in melanoma. Created by COPASI 4.25 (Build 207) This model is described in the article: Modelling and investigation of the CD4 T cells \u2013 Macrophages paradox in melanoma immunotherapiesRaluca Eftimie, Haneen HamamJournal of Theoretical Biology 420 (2017) 82\u2013104 Abstract: It is generally accepted that tumour cells can be eliminated by M1 anti-tumour macrophages and CD8+ T cells. However, experimental results over the past 10\u201315 years have shown that B16 mouse melanoma cells can be eliminated by the CD4+ T cells alone (either Th1 or Th2 sub-types), in the absence of CD8+ T cells. In some studies, elimination of B16 melanoma was associated with a Th1 immune response (i.e., elimination occurred in the presence of cytokines produced by Th1 cells), while in other studies melanoma elimination was associated with a Th2 immune response (i.e., elimination occurred in the presence of cytokines produced by Th2 cells). Moreover, macrophages have been shown to be present inside the tumours, during both Th1 and Th2 immune responses. To investigate the possible biological mechanisms behind these apparently contradictory results, we develop a class of mathematical models for the dynamics of Th1 and Th2 cells, and M1 and M2 macrophages in the presence/absence of tumour cells. Using this mathematical model, we show that depending on the re- polarisation rates between M1 and M2 macrophages, we obtain tumour elimination in the presence of a type-I immune response (i.e., more Th1 and M1 cells, compared to the Th2 and M2 cells), or in the presence of a type- II immune response (i.e., more Th2 and M2 cells). Moreover, tumour elimination is also possible in the presence of a mixed type-I/type-II immune response. Tumour growth always occurs in the presence of a type-II immune response, as observed experimentally. Finally, tumour dormancy is the result of a delicate balance between the pro-tumour effects of M2 cells and the anti-tumour effects of M1 and Th1 cells.To cite BioModels Database, please use: BioModels Database: An enhanced, curated and annotated resource for published quantitative kinetic models . To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.",
- "tags": [
- {
- "id": 2936,
- "tag": "BioModels"
- },
- {
- "id": 4245,
- "tag": "BioModels:BIOMD0000000769"
- },
- {
- "id": 3002,
- "tag": "Homo sapiens"
- },
- {
- "id": 704,
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- "timestamp_created": "2025-01-30 14:03:55.006004+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000000769",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "3055": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
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- "default_context": "4",
- "id": 3055,
- "name": "Eftimie2017/1 - interaction of Th and macrophage",
- "repository_type": "biomodels",
- "summary": "The paper describes a model of interaction of Th cells and macrophage in melanoma. Created by COPASI 4.25 (Build 207) This model is described in the article: Modelling and investigation of the CD4 T cells \u2013 Macrophages paradox in melanoma immunotherapiesRaluca Eftimie, Haneen HamamJournal of Theoretical Biology 420 (2017) 82\u2013104 Abstract: It is generally accepted that tumour cells can be eliminated by M1 anti-tumour macrophages and CD8+ T cells. However, experimental results over the past 10\u201315 years have shown that B16 mouse melanoma cells can be eliminated by the CD4+ T cells alone (either Th1 or Th2 sub-types), in the absence of CD8+ T cells. In some studies, elimination of B16 melanoma was associated with a Th1 immune response (i.e., elimination occurred in the presence of cytokines produced by Th1 cells), while in other studies melanoma elimination was associated with a Th2 immune response (i.e., elimination occurred in the presence of cytokines produced by Th2 cells). Moreover, macrophages have been shown to be present inside the tumours, during both Th1 and Th2 immune responses. To investigate the possible biological mechanisms behind these apparently contradictory results, we develop a class of mathematical models for the dynamics of Th1 and Th2 cells, and M1 and M2 macrophages in the presence/absence of tumour cells. Using this mathematical model, we show that depending on the re- polarisation rates between M1 and M2 macrophages, we obtain tumour elimination in the presence of a type-I immune response (i.e., more Th1 and M1 cells, compared to the Th2 and M2 cells), or in the presence of a type- II immune response (i.e., more Th2 and M2 cells). Moreover, tumour elimination is also possible in the presence of a mixed type-I/type-II immune response. Tumour growth always occurs in the presence of a type-II immune response, as observed experimentally. Finally, tumour dormancy is the result of a delicate balance between the pro-tumour effects of M2 cells and the anti-tumour effects of M1 and Th1 cells.To cite BioModels Database, please use: BioModels Database: An enhanced, curated and annotated resource for published quantitative kinetic models . To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.",
- "tags": [
- {
- "id": 2936,
- "tag": "BioModels"
- },
- {
- "id": 4246,
- "tag": "BioModels:BIOMD0000000770"
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- {
- "id": 3002,
- "tag": "Homo sapiens"
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- "id": 704,
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- "timestamp_created": "2025-01-30 14:03:55.488232+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000000770",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "3056": {
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- "content_types": "modeling",
- "content_types_list": [
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- "default_context": "5",
- "id": 3056,
- "name": "Bajzer2008 - Modeling of cancer virotherapy with recombinant measles viruses",
- "repository_type": "biomodels",
- "summary": "
This model describes the interactions between tumor cells and virus particles, with particular reference to virus-induced syncytium formation and ultimately death of tumor cells. Dynamics of infected cells, and production of new virus particules by infected cells, is also included.
A mathematical model describing oncolytic virotherapy with incorporation the viral lytic cycle and the virus-specific CTL response. The thresholds for viral treatment and virus-specific CTl response are also obtained.
",
- "tags": [
- {
- "id": 2936,
- "tag": "BioModels"
- },
- {
- "id": 4248,
- "tag": "BioModels:BIOMD0000000772"
- },
- {
- "id": 704,
- "tag": "SBML"
- }
- ],
- "timestamp_created": "2025-01-30 14:03:56.451696+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000000772",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3058": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "4",
- "id": 3058,
- "name": "Wodarz2018/2 - model with transit amplifying cells",
- "repository_type": "biomodels",
- "summary": "The paper describes a model of effect of cellular de-differentiation on the dynamics and evolution of tissue and tumor cells. Created by COPASI 4.25 (Build 207) This model is described in the article: Effect of cellular de-differentiation on the dynamics and evolution of tissue and tumor cells in mathematical models with feedback regulationDominik Wodarz J Theor Biol. 2018 July 07; 448: 86\u201393Abstract: Tissues are maintained by adult stem cells that self-renew and also differentiate into functioning tissue cells. Homeostasis is achieved by a set of complex mechanisms that involve regulatory feedback loops. Similarly, tumors are believed to be maintained by a minority population of cancer stem cells, while the bulk of the tumor is made up of more differentiated cells, and there is indication that some of the feedback loops that operate in tissues continue to be functional in tumors. Mathematical models of such tissue hierarchies, including feedback loops, have been analyzed in a variety of different contexts. Apart from stem cells giving rise to differentiated cells, it has also been observed that more differentiated cells can de-differentiate into stem cells, both in healthy tissue and tumors, aspects of which have also been investigated mathematically. This paper analyses the effect of de-differentiation on the basic and evolutionary dynamics of cells in the context of tissue hierarchy models that include negative feedback regulation of the cell populations. The models predict that in the presence of de-differentiation, the fixation probability of a neutral mutant is lower than in its absence. Therefore, if de-differentiation occurs, a mutant with identical parameters compared to the wild-type cell population behaves like a disadvantageous mutant. Similarly, the process of de-differentiation is found to lower the fixation probability of an advantageous mutant. These results indicate that the presence of de- differentiation can lower the rates of tumor initiation and progression in the context of the models considered here.To cite BioModels Database, please use: BioModels Database: An enhanced, curated and annotated resource for published quantitative kinetic models . To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.",
- "tags": [
- {
- "id": 2936,
- "tag": "BioModels"
- },
- {
- "id": 4249,
- "tag": "BioModels:BIOMD0000000773"
- },
- {
- "id": 3002,
- "tag": "Homo sapiens"
- },
- {
- "id": 704,
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- }
- ],
- "timestamp_created": "2025-01-30 14:03:56.941382+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000000773",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "3059": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "4",
- "id": 3059,
- "name": "Wodarz2018/1 - simple model",
- "repository_type": "biomodels",
- "summary": "The paper describes a basic model of effect of cellular de-differentiation on the dynamics and evolution of tissue and tumor cells. Created by COPASI 4.25 (Build 207) This model is described in the article: Effect of cellular de-differentiation on the dynamics and evolution of tissue and tumor cells in mathematical models with feedback regulationDominik Wodarz J Theor Biol. 2018 July 07; 448: 86\u201393Abstract: Tissues are maintained by adult stem cells that self-renew and also differentiate into functioning tissue cells. Homeostasis is achieved by a set of complex mechanisms that involve regulatory feedback loops. Similarly, tumors are believed to be maintained by a minority population of cancer stem cells, while the bulk of the tumor is made up of more differentiated cells, and there is indication that some of the feedback loops that operate in tissues continue to be functional in tumors. Mathematical models of such tissue hierarchies, including feedback loops, have been analyzed in a variety of different contexts. Apart from stem cells giving rise to differentiated cells, it has also been observed that more differentiated cells can de-differentiate into stem cells, both in healthy tissue and tumors, aspects of which have also been investigated mathematically. This paper analyses the effect of de-differentiation on the basic and evolutionary dynamics of cells in the context of tissue hierarchy models that include negative feedback regulation of the cell populations. The models predict that in the presence of de-differentiation, the fixation probability of a neutral mutant is lower than in its absence. Therefore, if de-differentiation occurs, a mutant with identical parameters compared to the wild-type cell population behaves like a disadvantageous mutant. Similarly, the process of de-differentiation is found to lower the fixation probability of an advantageous mutant. These results indicate that the presence of de- differentiation can lower the rates of tumor initiation and progression in the context of the models considered here.To cite BioModels Database, please use: BioModels Database: An enhanced, curated and annotated resource for published quantitative kinetic models . To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.",
- "tags": [
- {
- "id": 2936,
- "tag": "BioModels"
- },
- {
- "id": 4250,
- "tag": "BioModels:BIOMD0000000774"
- },
- {
- "id": 3002,
- "tag": "Homo sapiens"
- },
- {
- "id": 704,
- "tag": "SBML"
- }
- ],
- "timestamp_created": "2025-01-30 14:03:57.451257+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000000774",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "3060": {
- "auto_sync": true,
- "content_types": "modeling",
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- "modeling"
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- "default_context": "4",
- "id": 3060,
- "name": "Iarosz2015 - brain tumor",
- "repository_type": "biomodels",
- "summary": "The paper describes a model of brain tumor. Created by COPASI 4.25 (Build 207) This model is described in the article: Mathematical model of brain tumour with glia-neuron interactions and chemotherapy treatmentKelly C. Iarosz, Fernando S. Borges, Antonio M. Batista, Murilo S. Baptista, Regiane A. N. Siqueira, Ricardo L. Viana, Sergio R. LopesAbstract: In recent years, it became clear that a better understanding of the interactions among the main elements involved in the cancer network is necessary for the treatment of cancer and the suppression of cancer growth. In this work we propose a system of coupled differential equations that model brain tumour under treatment by chemotherapy, which considers interactions among the glial cells, the glioma, the neurons, and the chemotherapeutic agents. We study the conditions for the glioma growth to be eliminated, and identify values of the parameters for which the inhibition of the glioma growth is obtained with a minimal loss of healthy cells.To cite BioModels Database, please use: BioModels Database: An enhanced, curated and annotated resource for published quantitative kinetic models . To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.",
- "tags": [
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- "id": 2936,
- "tag": "BioModels"
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- {
- "id": 4251,
- "tag": "BioModels:BIOMD0000000775"
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- {
- "id": 3002,
- "tag": "Homo sapiens"
- },
- {
- "id": 704,
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- ],
- "timestamp_created": "2025-01-30 14:03:58.028941+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000000775",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "modeling"
- ],
- "default_context": "4",
- "id": 3061,
- "name": "Monro2008 - chemotherapy resistance",
- "repository_type": "biomodels",
- "summary": "The paper describes a model of resistance of cancer to chemotherapy. Created by COPASI 4.25 (Build 207) This model is described in the article: Modelling chemotherapy resistance in palliation and failed cure Helen C. Monro, Eamonn A. Gaffney J Theor Biol. 2009, 257 (2), pp.292 Abstract: The goal of palliative cancer chemotherapy treatment is to prolong survival and improve quality of life when tumour eradication is not feasible. Chemotherapy protocol design is considered in this context using a simple, robust, model of advanced tumour growth with Gompertzian dynamics, taking into account the effects of drug resistance. It is predicted that reduced chemotherapy protocols can readily lead to improved survival times due to the effects of competition between resistant and sensitive tumour cells. Very early palliation is also predicted to quickly yield near total tumour resistance and thus decrease survival duration. Finally, our simulations indicate that failed curative attempts using dose densification, a common protocol escalation strategy, can reduce survival times.To cite BioModels Database, please use: BioModels Database: An enhanced, curated and annotated resource for published quantitative kinetic models . To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.",
- "tags": [
- {
- "id": 2936,
- "tag": "BioModels"
- },
- {
- "id": 4252,
- "tag": "BioModels:BIOMD0000000776"
- },
- {
- "id": 3002,
- "tag": "Homo sapiens"
- },
- {
- "id": 704,
- "tag": "SBML"
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- ],
- "timestamp_created": "2025-01-30 14:03:58.653982+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000000776",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "3062": {
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- "content_types": "modeling",
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- "modeling"
- ],
- "default_context": "5",
- "id": 3062,
- "name": "Chakrabarty2010 - A control theory approach to cancer remission aided by an optimal therapy",
- "repository_type": "biomodels",
- "summary": "
This is a reinvestigation of a previous model depicting cancer remission. It involves application of mathematical tools from control theory to assess the optimal approach during the use of Adaptive Cellular Immunotherapy and interleukin-2 treatment.
",
- "tags": [
- {
- "id": 2936,
- "tag": "BioModels"
- },
- {
- "id": 4253,
- "tag": "BioModels:BIOMD0000000777"
- },
- {
- "id": 704,
- "tag": "SBML"
- }
- ],
- "timestamp_created": "2025-01-30 14:03:59.264818+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000000777",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3063": {
- "auto_sync": true,
- "content_types": "modeling",
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- "modeling"
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- "default_context": "4",
- "id": 3063,
- "name": "Wei2017 - tumor, T cell and cytokine interaction",
- "repository_type": "biomodels",
- "summary": "The paper describes a model of tumor-immune interaction. Created by COPASI 4.25 (Build 207) This model is described in the article: Periodically Pulsed Immunotherapy in a Mathematical Model of Tumor, CD4+ T Cells, and Antitumor Cytokine InteractionsHsiu-Chuan Wei, Jui-Ling Yu, Chia-Yu Hsu Computational and Mathematical Methods in Medicine Volume 2017, Article ID 2906282, 12 pages Abstract: Immunotherapy is one of the most recent approaches for controlling and curing malignant tumors. In this paper, we consider a mathematical model of periodically pulsed immunotherapy using CD4+ T cells and an antitumor cytokine. Mathematical analyses are performed to determine the threshold of a successful treatment. The interindividual variability is explored by one-, two-, and three-parameter bifurcation diagrams for a nontreatment case. Numerical simulation conducted in this paper shows that (i) the tumor can be regulated by administering CD4+ T cells alone in a patient with a strong immune system or who has been diagnosed at an early stage, (ii) immunotherapy with a large amount of an antitumor cytokine can boost the immune system to remit or even to suppress tumor cells completely, and (iii) through polytherapy the tumor can be kept at a smaller size with reduced dosages.To cite BioModels Database, please use: BioModels Database: An enhanced, curated and annotated resource for published quantitative kinetic models . To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.",
- "tags": [
- {
- "id": 2936,
- "tag": "BioModels"
- },
- {
- "id": 4254,
- "tag": "BioModels:BIOMD0000000778"
- },
- {
- "id": 3002,
- "tag": "Homo sapiens"
- },
- {
- "id": 704,
- "tag": "SBML"
- }
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- "timestamp_created": "2025-01-30 14:03:59.826174+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000000778",
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- "id": 3064,
- "name": "dePillis2009 - Mathematical model creation for cancer chemo-immunotherapy",
- "repository_type": "biomodels",
- "summary": "
This is an updated version of a previous model that described the dynamics of cancer treatment, with descriptions of tumour cell numbers, specific and non-specific immune cells (NK, CD8+ T cells and other lymphocytes) with inclusion of chemo- and immunotherapy. This model incorporates new data to provide an improved and more comprehensive model, with specific emphasis on better descriptions of IL-2 dynamics.
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- "tag": "BioModels"
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- "id": 4255,
- "tag": "BioModels:BIOMD0000000779"
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- "timestamp_created": "2025-01-30 14:04:00.386021+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000000779",
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- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
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- "default_context": "4",
- "id": 3065,
- "name": "Wang2016/1 - oncolytic efficacy of M1 virus-SNTM model",
- "repository_type": "biomodels",
- "summary": "The paper describes a model of oncolytic virotherapy. Created by COPASI 4.25 (Build 207) This model is described in the article: A mathematical model verifying potent oncolytic efficacy of M1 virusZizi Wang, Zhiming Guo, Huaqin Peng Mathematical Biosciences 276 (2016) 19\u201327Abstract: Motivated by the latest findings in a recent medical experiment [19] which identify a naturally occurring alphavirus (M1) as a novel selective killer targeting zinc-finger antiviral protein (ZAP)-deficient cancer cells, we propose a mathematical model to illustrate the growth of normal cells, tumor cells and the M1 virus with limited nutrient. In order to better understand biological mechanisms, we discuss two cases of the model: without competition and with competition. In the first part, the explicit threshold condi- tions for the persistence of normal cells (or tumor cells) is obtained accompanying with the biological explanations. The second part indicates that when competing with tumor cells, the normal cells will ex- tinct if M1 virus is ignored; Whereas, when M1 virus is considered, the growth trend of normal cells is similar to the one without competition. And by using uniformly strong repeller theorem, the minimum effective dosage of medication is explicitly found which is not reported in [19]. Furthermore, numerical simulations and corresponding biological interpretations are given to support our results.To cite BioModels Database, please use: BioModels Database: An enhanced, curated and annotated resource for published quantitative kinetic models . To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.",
- "tags": [
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- "tag": "BioModels"
- },
- {
- "id": 4256,
- "tag": "BioModels:BIOMD0000000780"
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- "tag": "Homo sapiens"
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- "timestamp_created": "2025-01-30 14:04:01.243379+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000000780",
- "user": {
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- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
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- "username": "osbadmin"
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- "default_context": "4",
- "id": 3066,
- "name": "Wang2016/2 - oncolytic efficacy of M1 virus-SNT model",
- "repository_type": "biomodels",
- "summary": "The paper describes a model of oncolytic virotherapy. Created by COPASI 4.25 (Build 207) This model is described in the article: A mathematical model verifying potent oncolytic efficacy of M1 virusZizi Wang, Zhiming Guo, Huaqin Peng Mathematical Biosciences 276 (2016) 19\u201327Abstract: Motivated by the latest findings in a recent medical experiment [19] which identify a naturally occurring alphavirus (M1) as a novel selective killer targeting zinc-finger antiviral protein (ZAP)-deficient cancer cells, we propose a mathematical model to illustrate the growth of normal cells, tumor cells and the M1 virus with limited nutrient. In order to better understand biological mechanisms, we discuss two cases of the model: without competition and with competition. In the first part, the explicit threshold condi- tions for the persistence of normal cells (or tumor cells) is obtained accompanying with the biological explanations. The second part indicates that when competing with tumor cells, the normal cells will ex- tinct if M1 virus is ignored; Whereas, when M1 virus is considered, the growth trend of normal cells is similar to the one without competition. And by using uniformly strong repeller theorem, the minimum effective dosage of medication is explicitly found which is not reported in [19]. Furthermore, numerical simulations and corresponding biological interpretations are given to support our results.To cite BioModels Database, please use: BioModels Database: An enhanced, curated and annotated resource for published quantitative kinetic models . To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.",
- "tags": [
- {
- "id": 2936,
- "tag": "BioModels"
- },
- {
- "id": 4257,
- "tag": "BioModels:BIOMD0000000781"
- },
- {
- "id": 3002,
- "tag": "Homo sapiens"
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- {
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- "timestamp_created": "2025-01-30 14:04:01.834604+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000000781",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "3067": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "4",
- "id": 3067,
- "name": "Wang2016/3 - oncolytic efficacy of M1 virus-SN model",
- "repository_type": "biomodels",
- "summary": "The paper describes a basic model of oncolytic virotherapy. Created by COPASI 4.25 (Build 207) This model is described in the article: A mathematical model verifying potent oncolytic efficacy of M1 virusZizi Wang, Zhiming Guo, Huaqin Peng Mathematical Biosciences 276 (2016) 19\u201327Abstract: Motivated by the latest findings in a recent medical experiment [19] which identify a naturally occurring alphavirus (M1) as a novel selective killer targeting zinc-finger antiviral protein (ZAP)-deficient cancer cells, we propose a mathematical model to illustrate the growth of normal cells, tumor cells and the M1 virus with limited nutrient. In order to better understand biological mechanisms, we discuss two cases of the model: without competition and with competition. In the first part, the explicit threshold condi- tions for the persistence of normal cells (or tumor cells) is obtained accompanying with the biological explanations. The second part indicates that when competing with tumor cells, the normal cells will ex- tinct if M1 virus is ignored; Whereas, when M1 virus is considered, the growth trend of normal cells is similar to the one without competition. And by using uniformly strong repeller theorem, the minimum effective dosage of medication is explicitly found which is not reported in [19]. Furthermore, numerical simulations and corresponding biological interpretations are given to support our results.To cite BioModels Database, please use: BioModels Database: An enhanced, curated and annotated resource for published quantitative kinetic models . To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.",
- "tags": [
- {
- "id": 2936,
- "tag": "BioModels"
- },
- {
- "id": 4258,
- "tag": "BioModels:BIOMD0000000782"
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- {
- "id": 3002,
- "tag": "Homo sapiens"
- },
- {
- "id": 704,
- "tag": "SBML"
- }
- ],
- "timestamp_created": "2025-01-30 14:04:02.356273+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000000782",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "3068": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "5",
- "id": 3068,
- "name": "Dong2014 - Mathematical modeling on helper t cells in a tumor immune system",
- "repository_type": "biomodels",
- "summary": "
This model gives a mathematical description of the interactions between tumor cells, cytotoxic T lymphocytes and helper T cells (HTCs) within the tumor microenvironment, with emphasis on the role played by HTCs. The effects and dynamics of adoptive cell immunotherapy and HTC recruitment are also specifically discussed.
This is a dynamical model of cancer growth that includes three interacting cell populations of tumor cells, healthy host cells and immune effector cells. The tumor-immune and the tumor-host interactions are characterized to reproduce experimental results.
This is a coupled ordinary differential equation model of tumour-immune dynamics, accounting for biological and clinical factors which regulate the interaction rates of cytotoxic T lymphocytes on the surface of the tumour mass.
This model presents a general target-mediated drug disposition (TMDD) model for bispecific antibodies (BsAbs), which bind to two different targets on different cell membranes. The model includes four different binding events for BsAbs, turnover of the targets, and internalization of the complexes. In addition, a quasi-equilibrium (QE) approximation with decreased number of binding parameters is also present.
",
- "tags": [
- {
- "id": 2936,
- "tag": "BioModels"
- },
- {
- "id": 4264,
- "tag": "BioModels:BIOMD0000000788"
- },
- {
- "id": 4265,
- "tag": "Bispecific Antibody"
- },
- {
- "id": 3002,
- "tag": "Homo sapiens"
- },
- {
- "id": 704,
- "tag": "SBML"
- }
- ],
- "timestamp_created": "2025-01-30 14:04:05.698652+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000000788",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "3074": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "5",
- "id": 3074,
- "name": "Jenner2018 - treatment of oncolytic virus",
- "repository_type": "biomodels",
- "summary": "The paper describes a model of oncolytic virotherapy. Created by COPASI 4.26 (Build 213) This model is described in the article: Mathematical Modelling of the Interaction Between Cancer Cells and an Oncolytic Virus: Insights into the Effects of Treatment ProtocolsAdrianne L. Jenner, Chae-Ok Yun, Peter S. Kim, Adelle C. F. CosterBull Math Biol (2018) 80:1615\u20131629Abstract: Oncolyticvirotherapyisanexperimentalcancertreatmentthatusesgenet- ically engineered viruses to target and kill cancer cells. One major limitation of this treatment is that virus particles are rapidly cleared by the immune system, preventing them from arriving at the tumour site. To improve virus survival and infectivity Kim et al. (Biomaterials 32(9):2314\u20132326, 2011) modified virus particles with the polymer polyethylene glycol (PEG) and the monoclonal antibody herceptin. Whilst PEG mod- ification appeared to improve plasma retention and initial infectivity, it also increased the virus particle arrival time. We derive a mathematical model that describes the inter- action between tumour cells and an oncolytic virus. We tune our model to represent the experimental data by Kim et al. (2011) and obtain optimised parameters. Our model provides a platform from which predictions may be made about the response of cancer growth to other treatment protocols beyond those in the experiments. Through model simulations, we find that the treatment protocol affects the outcome dramatically. We quantify the effects of dosage strategy as a function of tumour cell replication and tumour carrying capacity on the outcome of oncolytic virotherapy as a treatment. The relative significance of the modification of the virus and the crucial role it plays in optimising treatment efficacy are explored.To cite BioModels Database, please use: BioModels Database: An enhanced, curated and annotated resource for published quantitative kinetic models . To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.",
- "tags": [
- {
- "id": 2936,
- "tag": "BioModels"
- },
- {
- "id": 4266,
- "tag": "BioModels:BIOMD0000000789"
- },
- {
- "id": 3002,
- "tag": "Homo sapiens"
- },
- {
- "id": 704,
- "tag": "SBML"
- }
- ],
- "timestamp_created": "2025-01-30 14:04:06.247201+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000000789",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "3075": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "3",
- "id": 3075,
- "name": "Alvarez2019 - A nonlinear mathematical model of cell-mediated immune response for tumor phenotypic heterogeneity",
- "repository_type": "biomodels",
- "summary": "
This is a non-linear mathematical model of cancer immunosurveillance that takes into account intratumoral phenotypic heterogeneity, such as differential expression of cell surface receptors and growth factors, according to cell-mediated immune responses. The model describes phenomena that have also been observed in vivo, such as tumor dormancy, cancer immunoediting, and a strong sensitivity to initial conditions.
",
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- "id": 2936,
- "tag": "BioModels"
- },
- {
- "id": 4267,
- "tag": "BioModels:BIOMD0000000790"
- },
- {
- "id": 704,
- "tag": "SBML"
- }
- ],
- "timestamp_created": "2025-01-30 14:04:06.827198+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000000790",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3076": {
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- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "5",
- "id": 3076,
- "name": "Wilson2012 - tumor vaccine efficacy",
- "repository_type": "biomodels",
- "summary": "The paper describes a model of antitumor vaccine therapy.Created by COPASI 4.25 (Build 207) This model is described in the article: A Mathematical Model of the Enhancement of Tumor Vaccine Efficacy by ImmunotherapyShelby Wilson and Doron LevyBull Math Biol. 2012 July ; 74(7)Abstract: TGF-\u03b2 is an immunoregulatory protein that contributes to inadequate antitumor immune responses in cancer patients. Recent experimental data suggests that TGF-\u03b2 inhibition alone, provides few clinical benefits, yet it can significantly amplify the anti-tumor immune response when combined with a tumor vaccine. We develop a mathematical model in order to gain insight into the cooperative interaction between anti-TGF-\u03b2 and vaccine treatments. The mathematical model follows the dynamics of the tumor size, TGF-\u03b2 concentration, activated cytotoxic effector cells, and regulatory T cells. Using numerical simulations and stability analysis, we study the following scenarios: a control case of no treatment, anti-TGF-\u03b2 treatment, vaccine treatment, and combined anti-TGF-\u03b2 vaccine treatments. We show that our model is capable of capturing the observed experimental results, and hence can be potentially used in designing future experiments involving this approach to immunotherapy.To cite BioModels Database, please use: BioModels Database: An enhanced, curated and annotated resource for published quantitative kinetic models . To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.",
- "tags": [
- {
- "id": 2936,
- "tag": "BioModels"
- },
- {
- "id": 4268,
- "tag": "BioModels:BIOMD0000000791"
- },
- {
- "id": 3002,
- "tag": "Homo sapiens"
- },
- {
- "id": 704,
- "tag": "SBML"
- }
- ],
- "timestamp_created": "2025-01-30 14:04:07.417596+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000000791",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "3077": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "5",
- "id": 3077,
- "name": "Hu2019 - Modeling Pancreatic Cancer Dynamics with Immunotherapy",
- "repository_type": "biomodels",
- "summary": "
This is a mathematical model of pancreatic cancer that includes descriptions of pancreatic cancer cells, pancreatic stellate cells, effector cells and tumor-promoting and tumor-suppressing cytokines to investigate the effects of immunotherapies on patient survival.
",
- "tags": [
- {
- "id": 2936,
- "tag": "BioModels"
- },
- {
- "id": 4269,
- "tag": "BioModels:BIOMD0000000792"
- },
- {
- "id": 704,
- "tag": "SBML"
- }
- ],
- "timestamp_created": "2025-01-30 14:04:07.929674+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000000792",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3078": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "4",
- "id": 3078,
- "name": "Chen2011/1 - bone marrow invasion absolute model",
- "repository_type": "biomodels",
- "summary": "The paper describes a model of tumor invasion to bone marrow. Created by COPASI 4.26 (Build 213) This model is described in the article: Modeling invasion of metastasizing cancer cells to bone marrow utilizing ecological principlesKun-Wan Chen, Kenneth J Pienta Theoretical Biology and Medical Modelling 2011, 8:36 Abstract: Background: The invasion of a new species into an established ecosystem can be directly compared to the steps involved in cancer metastasis. Cancer must grow in a primary site, extravasate and survive in the circulation to then intravasate into target organ (invasive species survival in transport). Cancer cells often lay dormant at their metastatic site for a long period of time (lag period for invasive species) before proliferating (invasive spread). Proliferation in the new site has an impact on the target organ microenvironment (ecological impact) and eventually the human host (biosphere impact).Results: Tilman has described mathematical equations for the competition between invasive species in a structured habitat. These equations were adapted to study the invasion of cancer cells into the bone marrow microenvironment as a structured habitat. A large proportion of solid tumor metastases are bone metastases, known to usurp hematopoietic stem cells (HSC) homing pathways to establish footholds in the bone marrow. This required accounting for the fact that this is the natural home of hematopoietic stem cells and that they already occupy this structured space. The adapted Tilman model of invasion dynamics is especially valuable for modeling the lag period or dormancy of cancer cells.Conclusions: The Tilman equations for modeling the invasion of two species into a defined space have been modified to study the invasion of cancer cells into the bone marrow microenvironment. These modified equations allow a more flexible way to model the space competition between the two cell species. The ability to model initial density, metastatic seeding into the bone marrow and growth once the cells are present, and movement of cells out of the bone marrow niche and apoptosis of cells are all aspects of the adapted equations. These equations are currently being applied to clinical data sets for verification and further refinement of the models.To cite BioModels Database, please use: BioModels Database: An enhanced, curated and annotated resource for published quantitative kinetic models . To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.",
- "tags": [
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- "id": 2936,
- "tag": "BioModels"
- },
- {
- "id": 4270,
- "tag": "BioModels:BIOMD0000000793"
- },
- {
- "id": 3002,
- "tag": "Homo sapiens"
- },
- {
- "id": 704,
- "tag": "SBML"
- }
- ],
- "timestamp_created": "2025-01-30 14:04:08.451187+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000000793",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3079": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "4",
- "id": 3079,
- "name": "Benary2019 - Controlling NFKB dynamics by B-TrCP",
- "repository_type": "biomodels",
- "summary": "
its a mathematical model studying impact of b_TrCP on NFKB nuclear dynamics. This model is derived from Lipniacki2004 (PMID:15094015).
",
- "tags": [
- {
- "id": 2936,
- "tag": "BioModels"
- },
- {
- "id": 4271,
- "tag": "BioModels:BIOMD0000000794"
- },
- {
- "id": 704,
- "tag": "SBML"
- }
- ],
- "timestamp_created": "2025-01-30 14:04:09.039401+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000000794",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3080": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "4",
- "id": 3080,
- "name": "Chen2011/2 - bone marrow invasion relative model",
- "repository_type": "biomodels",
- "summary": "The paper describes a model of tumor invasion to bone marrow. Created by COPASI 4.26 (Build 213) This model is described in the article: Modeling invasion of metastasizing cancer cells to bone marrow utilizing ecological principlesKun-Wan Chen, Kenneth J Pienta Theoretical Biology and Medical Modelling 2011, 8:36 Abstract: Background: The invasion of a new species into an established ecosystem can be directly compared to the steps involved in cancer metastasis. Cancer must grow in a primary site, extravasate and survive in the circulation to then intravasate into target organ (invasive species survival in transport). Cancer cells often lay dormant at their metastatic site for a long period of time (lag period for invasive species) before proliferating (invasive spread). Proliferation in the new site has an impact on the target organ microenvironment (ecological impact) and eventually the human host (biosphere impact).Results: Tilman has described mathematical equations for the competition between invasive species in a structured habitat. These equations were adapted to study the invasion of cancer cells into the bone marrow microenvironment as a structured habitat. A large proportion of solid tumor metastases are bone metastases, known to usurp hematopoietic stem cells (HSC) homing pathways to establish footholds in the bone marrow. This required accounting for the fact that this is the natural home of hematopoietic stem cells and that they already occupy this structured space. The adapted Tilman model of invasion dynamics is especially valuable for modeling the lag period or dormancy of cancer cells.Conclusions: The Tilman equations for modeling the invasion of two species into a defined space have been modified to study the invasion of cancer cells into the bone marrow microenvironment. These modified equations allow a more flexible way to model the space competition between the two cell species. The ability to model initial density, metastatic seeding into the bone marrow and growth once the cells are present, and movement of cells out of the bone marrow niche and apoptosis of cells are all aspects of the adapted equations. These equations are currently being applied to clinical data sets for verification and further refinement of the models.To cite BioModels Database, please use: BioModels Database: An enhanced, curated and annotated resource for published quantitative kinetic models . To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.",
- "tags": [
- {
- "id": 2936,
- "tag": "BioModels"
- },
- {
- "id": 4272,
- "tag": "BioModels:BIOMD0000000795"
- },
- {
- "id": 3002,
- "tag": "Homo sapiens"
- },
- {
- "id": 704,
- "tag": "SBML"
- }
- ],
- "timestamp_created": "2025-01-30 14:04:09.695359+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000000795",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "3081": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "4",
- "id": 3081,
- "name": "Yang2012 - cancer growth with angiogenesis",
- "repository_type": "biomodels",
- "summary": "The paper describes a model of tumor growth with angiogenesis. Created by COPASI 4.26 (Build 213) This model is described in the article: Mathematical modeling of solid cancer growth with angiogenesisHyun M Yang Theoretical Biology and Medical Modelling 2012, 9:2 Abstract: Background: Cancer arises when within a single cell multiple malfunctions of control systems occur, which are, broadly, the system that promote cell growth and the system that protect against erratic growth. Additional systems within the cell must be corrupted so that a cancer cell, to form a mass of any real size, produces substances that promote the growth of new blood vessels. Multiple mutations are required before a normal cell can become a cancer cell by corruption of multiple growth-promoting systems.Methods: We develop a simple mathematical model to describe the solid cancer growth dynamics inducing angiogenesis in the absence of cancer controlling mechanisms.Results: The initial conditions supplied to the dynamical system consist of a perturbation in form of pulse: The origin of cancer cells from normal cells of an organ of human body. Thresholds of interacting parameters were obtained from the steady states analysis. The existence of two equilibrium points determine the strong dependency of dynamical trajectories on the initial conditions. The thresholds can be used to control cancer.Conclusions: Cancer can be settled in an organ if the following combination matches: better fitness of cancer cells, decrease in the efficiency of the repairing systems, increase in the capacity of sprouting from existing vascularization, and higher capacity of mounting up new vascularization. However, we show that cancer is rarely induced in organs (or tissues) displaying an efficient (numerically and functionally) reparative or regenerative mechanism.To cite BioModels Database, please use: BioModels Database: An enhanced, curated and annotated resource for published quantitative kinetic models . To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.",
- "tags": [
- {
- "id": 2936,
- "tag": "BioModels"
- },
- {
- "id": 4273,
- "tag": "BioModels:BIOMD0000000796"
- },
- {
- "id": 3002,
- "tag": "Homo sapiens"
- },
- {
- "id": 704,
- "tag": "SBML"
- }
- ],
- "timestamp_created": "2025-01-30 14:04:10.241412+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000000796",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3082": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
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- "default_context": "7",
- "id": 3082,
- "name": "Hu2018 - Dynamics of tumor-CD4+-cytokine-host cells interactions with treatments",
- "repository_type": "biomodels",
- "summary": "
This is a proposed mathematical model describing interactions between tumor cells, CD4+ T cells, cytokines, and host cells within the context of CD4+ T cells inducing tumor regression. A platform is provided to assess the effectiveness of single or combination therapy with CD4+ T cells and/or cytokines.
",
- "tags": [
- {
- "id": 2936,
- "tag": "BioModels"
- },
- {
- "id": 4274,
- "tag": "BioModels:BIOMD0000000797"
- },
- {
- "id": 704,
- "tag": "SBML"
- }
- ],
- "timestamp_created": "2025-01-30 14:04:10.788194+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000000797",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3083": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "4",
- "id": 3083,
- "name": "Sharp2019 - AML",
- "repository_type": "biomodels",
- "summary": "The paper describes a model of acute myeloid leukaemia. Created by COPASI 4.26 (Build 213) This model is described in the article: Optimal control of acute myeloid leukaemia Jesse A. Sharp, Alexander P Browning, Tarunendu Mapder, Kevin Burrage, Matthew J SimpsonJournal of Theoretical Biology 470 (2019) 30\u201342 Abstract: Acute myeloid leukaemia (AML) is a blood cancer affecting haematopoietic stem cells. AML is routinely treated with chemotherapy, and so it is of great interest to develop optimal chemotherapy treatment strategies. In this work, we incorporate an immune response into a stem cell model of AML, since we find that previous models lacking an immune response are inappropriate for deriving optimal control strategies. Using optimal control theory, we produce continuous controls and bang-bang controls, corre- sponding to a range of objectives and parameter choices. Through example calculations, we provide a practical approach to applying optimal control using Pontryagin\u2019s Maximum Principle. In particular, we describe and explore factors that have a profound influence on numerical convergence. We find that the convergence behaviour is sensitive to the method of control updating, the nature of the control, and to the relative weighting of terms in the objective function. All codes we use to implement optimal control are made available.To cite BioModels Database, please use: BioModels Database: An enhanced, curated and annotated resource for published quantitative kinetic models . To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.",
- "tags": [
- {
- "id": 2936,
- "tag": "BioModels"
- },
- {
- "id": 4275,
- "tag": "BioModels:BIOMD0000000798"
- },
- {
- "id": 3002,
- "tag": "Homo sapiens"
- },
- {
- "id": 704,
- "tag": "SBML"
- }
- ],
- "timestamp_created": "2025-01-30 14:04:11.295188+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000000798",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3084": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "3",
- "id": 3084,
- "name": "Cucuianu2010 - A hypothetical-mathematical model of acute myeloid leukaemia pathogenesis",
- "repository_type": "biomodels",
- "summary": "
This is a simple mathematical model describing the growth and removal of normal and leukemic haematopoietic stem cell populations and the role of these cellular processes in generating monoclonal leukemic patterns.
This is a basic mathematical model describing the dynamics of three cell lines (normal host cells, leukemic host cells and donor cells) after allogeneic stem cell transplantation.
",
- "tags": [
- {
- "id": 2936,
- "tag": "BioModels"
- },
- {
- "id": 4277,
- "tag": "BioModels:BIOMD0000000800"
- },
- {
- "id": 704,
- "tag": "SBML"
- }
- ],
- "timestamp_created": "2025-01-30 14:04:12.403732+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000000800",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3086": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "4",
- "id": 3086,
- "name": "Sturrock2015 - glioma growth",
- "repository_type": "biomodels",
- "summary": "The paper describes a model of glioma. Created by COPASI 4.26 (Build 213) This model is described in the article: A mathematical model of pre-diagnostic glioma growth Marc Sturrock, Wenrui Hao, Judith Schwartzbaum, Grzegorz A. Rempala J Theor Biol. 2015 September 7; 380: 299\u2013308 Abstract: Due to their location, the malignant gliomas of the brain in humans are very difficult to treat in advanced stages. Blood-based biomarkers for glioma are needed for more accurate evaluation of treatment response as well as early diagnosis. However, biomarker research in primary brain tumors is challenging given their relative rarity and genetic diversity. It is further complicated by variations in the permeability of the blood brain barrier that affects the amount of marker released into the bloodstream. Inspired by recent temporal data indicating a possible decrease in serum glucose levels in patients with gliomas yet to be diagnosed, we present an ordinary differential equation model to capture early stage glioma growth. The model contains glioma-glucose-immune interactions and poses a potential mechanism by which this glucose drop can be explained. We present numerical simulations, parameter sensitivity analysis, linear stability analysis and a numerical experiment whereby we show how a dormant glioma can become malignant.To cite BioModels Database, please use: BioModels Database: An enhanced, curated and annotated resource for published quantitative kinetic models . To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.",
- "tags": [
- {
- "id": 2936,
- "tag": "BioModels"
- },
- {
- "id": 4278,
- "tag": "BioModels:BIOMD0000000801"
- },
- {
- "id": 3002,
- "tag": "Homo sapiens"
- },
- {
- "id": 704,
- "tag": "SBML"
- }
- ],
- "timestamp_created": "2025-01-30 14:04:12.914128+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000000801",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3087": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "4",
- "id": 3087,
- "name": "Hoffman2018- ADCC against cancer",
- "repository_type": "biomodels",
- "summary": "The paper describes a model of ADCC. Created by COPASI 4.26 (Build 213) This model is described in the article: A mathematical model of antibody-dependent cellular cytotoxicity (ADCC) F. Hoffman, D. Gavaghan, J. Osborne, I.P. Barrett, T. You, H. Ghadially, R. Sainson, R.W. Wilkinson, H.M. ByrneJournal of Theoretical Biology 436 (2018) 39\u201350 Abstract: Immunotherapies exploit the immune system to target and kill cancer cells, while sparing healthy tis- sue. Antibody therapies, an important class of immunotherapies, involve the binding to specific antigens on the surface of the tumour cells of antibodies that activate natural killer (NK) cells to kill the tu- mour cells. Preclinical assessment of molecules that may cause antibody-dependent cellular cytotoxicity (ADCC) involves co-culturing cancer cells, NK cells and antibody in vitro for several hours and measuring subsequent levels of tumour cell lysis. Here we develop a mathematical model of such an in vitro ADCC assay, formulated as a system of time-dependent ordinary differential equations and in which NK cells kill cancer cells at a rate which depends on the amount of antibody bound to each cancer cell. Numerical simulations generated using experimentally-based parameter estimates reveal that the system evolves on two timescales: a fast timescale on which antibodies bind to receptors on the surface of the tumour cells, and NK cells form complexes with the cancer cells, and a longer time-scale on which the NK cells kill the cancer cells. We construct approximate model solutions on each timescale, and show that they are in good agreement with numerical simulations of the full system. Our results show how the processes involved in ADCC change as the initial concentration of antibody and NK-cancer cell ratio are varied. We use these results to explain what information about the tumour cell kill rate can be extracted from the cytotoxicity assays.To cite BioModels Database, please use: BioModels Database: An enhanced, curated and annotated resource for published quantitative kinetic models . To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.",
- "tags": [
- {
- "id": 2936,
- "tag": "BioModels"
- },
- {
- "id": 4279,
- "tag": "BioModels:BIOMD0000000802"
- },
- {
- "id": 3002,
- "tag": "Homo sapiens"
- },
- {
- "id": 704,
- "tag": "SBML"
- }
- ],
- "timestamp_created": "2025-01-30 14:04:13.443927+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000000802",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3088": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "5",
- "id": 3088,
- "name": "Park2019 - IL7 receptor signaling in T cells",
- "repository_type": "biomodels",
- "summary": "
This model is an attempt to provide a mathematical description of IL-7 dependent T cell homeostasis at the molecular and cellular level, with inclusion of gamma-chain and ligand binding in the context of receptors for IL-7 and IL-15 receptors.
",
- "tags": [
- {
- "id": 2936,
- "tag": "BioModels"
- },
- {
- "id": 4280,
- "tag": "BioModels:BIOMD0000000803"
- },
- {
- "id": 704,
- "tag": "SBML"
- }
- ],
- "timestamp_created": "2025-01-30 14:04:13.948493+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000000803",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3089": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "4",
- "id": 3089,
- "name": "Koenders2015 - multiple myeloma",
- "repository_type": "biomodels",
- "summary": "The paper describes a model of multiple myeloma. Created by COPASI 4.26 (Build 213) This model is described in the article: A mathematical model of cell equilibrium and joint cell formation in multiple myelomaM.A. Koenders, R. Saso Journal of Theoretical Biology 390 (2016) 73\u201379Abstract: In Multiple Myeloma Bone Disease healthy bone remodelling is affected by tumour cells by means of paracrine cytokinetic signalling in such a way that osteoclast formation is enhanced and the growth of osteoblast cells inhibited. The participating cytokines are described in the literature. Osteoclast-induced myeloma cell growth is also reported. Based on existing mathematical models for healthy bone remo- delling a three-way equilibrium model is presented for osteoclasts, osteoblasts and myeloma cell populations to describe the progress of the illness in a scenario in which there is a secular increase in the cytokinetic interactive effectiveness of paracrine processes. The equilibrium state for the system is obtained. The paracrine interactive effectiveness is explored by parameter variation and the stable region in the parameter space is identified. Then recently-discovered joint myeloma\u2013osteoclast cells are added to the model to describe the populations inside lytic lesions. It transpires that their presence expands the available parameter space for stable equilibrium, thus permitting a detrimental, larger population of osteoclasts and myeloma cells. A possible relapse mechanism for the illness is explored by letting joint cells dissociate. The mathematics then permits the evaluation of the evolution of the cell populations as a function of time during relapse.To cite BioModels Database, please use: BioModels Database: An enhanced, curated and annotated resource for published quantitative kinetic models . To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.",
- "tags": [
- {
- "id": 2936,
- "tag": "BioModels"
- },
- {
- "id": 4281,
- "tag": "BioModels:BIOMD0000000804"
- },
- {
- "id": 3002,
- "tag": "Homo sapiens"
- },
- {
- "id": 704,
- "tag": "SBML"
- }
- ],
- "timestamp_created": "2025-01-30 14:04:14.449691+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000000804",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3090": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "4",
- "id": 3090,
- "name": "Al-Husari2013 - pH and lactate in tumor",
- "repository_type": "biomodels",
- "summary": "The paper describes a model of pH control in tumor. Created by COPASI 4.26 (Build 213) This model is described in the article: Regulation of tumour intracellular pH: A mathematical model examining the interplay between H and lactateMaymona Al-Husari, Steven D. WebbJournal of Theoretical Biology 322 (2013) 58\u201371 Abstract:Non-invasive measurements of pH have shown that both tumour and normal cells have intracellular pH (pHi) that lies on the alkaline side of neutrality (7.1\u20137.2). However, extracellular pH (pHe) is reported to be more acidic in some tumours compared to normal tissues. Many cellular processes and therapeutic agents are known to be tightly pH dependent which makes the study of intracellular pH regulation of paramount importance. We develop a mathematical model that examines the role of various membrane-based ion transporters in tumour pH regulation, in particular, with a focus on the interplay between lactate and H ions and whether the lactate/H symporter activity is sufficient to give rise to the observed reversed pH gradient that is seen is some tumours. Using linear stability analysis and H ions. We extend this analysis using perturbation techniques to specifically examine a rapid change in H-ion concentrations relative to variations in lactate. We then perform a parameter sensitivity analysis to explore solution robustness to parameter variations. An important result from our study is that a reversed pH gradient is possible in our system but for unrealistic parameter estimates\u2014pointing to the possible involvement of other mechanisms in cellular pH gradient reversal, for example acidic vesicles, lysosomes, golgi and endosomes.To cite BioModels Database, please use: BioModels Database: An enhanced, curated and annotated resource for published quantitative kinetic models . To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.",
- "tags": [
- {
- "id": 2936,
- "tag": "BioModels"
- },
- {
- "id": 4282,
- "tag": "BioModels:BIOMD0000000805"
- },
- {
- "id": 3002,
- "tag": "Homo sapiens"
- },
- {
- "id": 704,
- "tag": "SBML"
- }
- ],
- "timestamp_created": "2025-01-30 14:04:15.010502+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000000805",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3091": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "10",
- "id": 3091,
- "name": "Eftimie2019-Macrophages Plasticity",
- "repository_type": "biomodels",
- "summary": "This paper describes the complex interactions between two extreme types of macrophages (M1 and M2 cells), effector T cells and an oncolytic Vesicular Stomatitis Virus (VSV), on the growth/elimination of B16F10 melanoma. The mathematics model descirbes, in terms of VSV and macrophages levels, two different types of immune responses which could ensure tumour control and eventual elimination. It shows that both innate and adaptive anti-tumour immune responses, as well as the oncolytic virus, could be very important in delaying tumour relapse and eventually eliminating the tumour. Overall this study supports the use mathematical modelling to increase our understanding of the complex immune interaction following oncolytic virotherapies. However, the complexity of the model combined with a lack of sufficient data for model parametrisation has an impact on the possibility of making quantitative predictions. The Model was created using COPASI version 4.24 (Build 197)",
- "tags": [
- {
- "id": 2936,
- "tag": "BioModels"
- },
- {
- "id": 4283,
- "tag": "BioModels:BIOMD0000000806"
- },
- {
- "id": 3090,
- "tag": "Mus musculus"
- },
- {
- "id": 704,
- "tag": "SBML"
- },
- {
- "id": 4284,
- "tag": "Vesicular stomatitis virus"
- },
- {
- "id": 4603,
- "tag": "Cancer"
- },
- {
- "id": 4650,
- "tag": "Skin cancer"
- }
- ],
- "timestamp_created": "2025-01-30 14:04:15.831405+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000000806",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3092": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "7",
- "id": 3092,
- "name": "Fassoni2019 - Oncogenesis encompassing mutations and genetic instability",
- "repository_type": "biomodels",
- "summary": "This model describes the multistep process that transform a normal cell and its descendants into a malignant tumour by considering three populations: normal, premalignant and cancer cells. Created by COPASI 4.24(Build 197)Abstract:Tumorigenesis has been described as a multistep process, where each step is associated with a genetic alteration, in the direction to progressively transform a normal cell and its descendants into a malignant tumour. Into this work, we propose a mathematical model for cancer onset and development, considering three populations: normal, premalignant and cancer cells. The model takes into account three hallmarks of cancer: self-sufficiency on growth signals, insensibility to anti-growth signals and evading apoptosis. By using a nonlinear expression to describe the mutation from premalignant to cancer cells, the model includes genetic instability as an enabling characteristic of tumour progression. Mathematical analysis was performed in detail. Results indicate that apoptosis and tissue repair system are the first barriers against tumour progression. One of these mechanisms must be corrupted for cancer to develop from a single mutant cell. The results also show that the presence of aggressive cancer cells opens way to survival of less adapted premalignant cells. Numerical simulations were performed with parameter values based on experimental data of breast cancer, and the necessary time taken for cancer to reach a detectable size from a single mutant cell was estimated with respect to some parameters. We find that the rates of apoptosis and mutations have a large influence on the pace of tumour progression and on the time it takes to become clinically detectable.",
- "tags": [
- {
- "id": 2936,
- "tag": "BioModels"
- },
- {
- "id": 4285,
- "tag": "BioModels:BIOMD0000000807"
- },
- {
- "id": 704,
- "tag": "SBML"
- }
- ],
- "timestamp_created": "2025-01-30 14:04:16.372770+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000000807",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "3093": {
- "auto_sync": true,
- "content_types": "modeling",
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- "modeling"
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- "default_context": "3",
- "id": 3093,
- "name": "Kronik2008 - Improving alloreactive CTL immunotherapy for malignant gliomas using a simulation model of their interactive dynamics",
- "repository_type": "biomodels",
- "summary": "
This mathematical model describes interactions between glioma tumors and the immune system that may occur following direct intra-tumoral administration of ex-vivo activated alloreactive cytotoxic-T-lymphocytes (aCTLs) as part of adoptive immunotherapy. The model includes descriptions of aCTL, neoplastic cells, MHC class I and II molecules, TGF-beta and IFN-gamma.
",
- "tags": [
- {
- "id": 2936,
- "tag": "BioModels"
- },
- {
- "id": 4286,
- "tag": "BioModels:BIOMD0000000808"
- },
- {
- "id": 704,
- "tag": "SBML"
- }
- ],
- "timestamp_created": "2025-01-30 14:04:16.923760+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000000808",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "3094": {
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- "default_context": "9",
- "id": 3094,
- "name": "Malinzi2018 - tumour-immune interaction model",
- "repository_type": "biomodels",
- "summary": "The paper describes a spatio-temporal mathematical model, in the form of a moving boundary problem, to explain cancer dormancy is developed. Created by COPASI 4.24 (Build 197)Abstract:A spatio-temporal mathematical model, in the form of a moving boundary problem, to explain cancer dormancy is developed. Analysis of the model is carried out for both temporal and spatio-temporal cases. Stability analysis and numerical simulations of the temporal model replicate experimental observations of immune-induced tumour dormancy. Travelling wave solutions of the spatio-temporal model are determined using the hyperbolic tangent method and minimum wave speeds of invasion are calculated. Travelling wave analysis depicts that cell invasion dynamics are mainly driven by their motion and growth rates. A stability analysis of the spatio-temporal model shows a possibility of dynamical stabilization of the tumour-free steady state. Simulation results reveal that the tumour swells to a dormant level.",
- "tags": [
- {
- "id": 2936,
- "tag": "BioModels"
- },
- {
- "id": 4287,
- "tag": "BioModels:BIOMD0000000809"
- },
- {
- "id": 704,
- "tag": "SBML"
- },
- {
- "id": 4603,
- "tag": "Cancer"
- }
- ],
- "timestamp_created": "2025-01-30 14:04:17.424899+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000000809",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "3095": {
- "auto_sync": true,
- "content_types": "modeling",
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- "default_context": "6",
- "id": 3095,
- "name": "Ganguli2018-immuno regulatory mechanisms in tumor microenvironment",
- "repository_type": "biomodels",
- "summary": "This model describes the concept of Cancer Stem Cells(CSC) differentiation and tumor-immune interaction into a generic model that has been validated with known experimental data. Created by COPASI 4.24(Build197)Abstract:The tumor microenvironment comprising of the immune cells and cytokines acts as the 'soil' that nourishes a developing tumor. Lack of a comprehensive study of the interactions of this tumor microenvironment with the heterogeneous sub-population of tumor cells that arise from the differentiation of Cancer Stem Cells (CSC), i.e. the 'seed', has limited our understanding of the development of drug resistance and treatment failures in Cancer. Based on this seed and soil hypothesis, for the very first time, we have captured the concept of CSC differentiation and tumor-immune interaction into a generic model that has been validated with known experimental data. Using this model we report that as the CSC differentiation shifts from symmetric to asymmetric pattern, resistant cancer cells start accumulating in the tumor that makes it refractory to therapeutic interventions. Model analyses unveiled the presence of feedback loops that establish the dual role of M2 macrophages in regulating tumor proliferation. The study further revealed oscillations in the tumor sub-populations in the presence of TH1 derived IFN-\u03b3 that eliminates CSC; and the role of IL10 feedback in the regulation of TH1/TH2 ratio. These analyses expose important observations that are indicative of Cancer prognosis. Further, the model has been used for testing known treatment protocols to explore the reasons of failure of conventional treatment strategies and propose an improvised protocol that shows promising results in suppressing the proliferation of all the cellular sub-populations of the tumor and restoring a healthy TH1/TH2 ratio that assures better Cancer remission.",
- "tags": [
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- "id": 2936,
- "tag": "BioModels"
- },
- {
- "id": 4288,
- "tag": "BioModels:BIOMD0000000810"
- },
- {
- "id": 704,
- "tag": "SBML"
- },
- {
- "id": 4289,
- "tag": "breast cancer"
- },
- {
- "id": 4603,
- "tag": "Cancer"
- }
- ],
- "timestamp_created": "2025-01-30 14:04:17.916060+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000000810",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3096": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "5",
- "id": 3096,
- "name": "He2017 - A mathematical model of pancreatic cancer with two kinds of treatments",
- "repository_type": "biomodels",
- "summary": "
This is a mathematical model of pancreatic cancer which includes descriptions of regulatory T cell activity and inhibition therapy. Descriptions of cytokine induced killer immunotherapy are also included.
This is a mathematical model that describes the interactions between cytotoxic T cells and tumor cells as influenced by B7-H1 (PD-L1) activity, with a focus on how B7-H1 affects cancer cells apoptosis.
This is a mathematical model describing tumor-CD4+-cytokine interactions, with specific emphasis on the role that CD4+ T lymphocytes play in tumor regression.
",
- "tags": [
- {
- "id": 2936,
- "tag": "BioModels"
- },
- {
- "id": 4292,
- "tag": "BioModels:BIOMD0000000813"
- },
- {
- "id": 704,
- "tag": "SBML"
- }
- ],
- "timestamp_created": "2025-01-30 14:04:19.453265+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000000813",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3099": {
- "auto_sync": true,
- "content_types": "modeling",
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- "default_context": "6",
- "id": 3099,
- "name": "Perez-Garcia19 - Computational design of improved standardized chemotherapy protocols for grade 2 oligodendrogliomas",
- "repository_type": "biomodels",
- "summary": "This is a model built by COPASI4.24(Build 197)This a model from the article: Computational design of improved standardized chemotherapy protocols for grade II oligodendrogliomasV\u00edctor M. P\u00e9rez-Garc\u00eda, Luis E. Ayala-Hern\u00e1ndez, Juan Belmonte-Beitia, Philippe Schucht, Michael Murek, Andreas Raabe, Juan Sep\u00falveda. PLoS Comput Biol. 2019 Jul; 15(7): e1006778.Abstract: Here we put forward a mathematical model describing the response of low-grade (WHO grade II) oligodendrogliomas (LGO) to temozolomide (TMZ). The model describes the longitudinal volumetric dynamics of tumor response to TMZ of a cohort of 11 LGO patients treated with TMZ. After finding patient-specific parameters, different therapeutic strategies were tried computationally on the \u2018in-silico twins\u2019 of those patients. Chemotherapy schedules with larger-than-standard rest periods between consecutive cycles had either the same or better long-term efficacy than the standard 28-day cycles. The results were confirmed in a large trial of 2000 virtual patients. These long-cycle schemes would also have reduced toxicity and defer the appearance of resistances. On the basis of those results, a combination scheme consisting of five induction TMZ cycles given monthly plus 12 maintenance cycles given every three months was found to provide substantial survival benefits for the in-silico twins of the 11 LGO patients (median 5.69 years, range: 0.67 to 68.45 years) and in a large virtual trial including 2000 patients. We used 220 sets of experiments in-silico to show that a clinical trial incorporating 100 patients per arm (standard intensive treatment versus 5 + 12 scheme) could demonstrate the superiority of the novel scheme after a follow-up period of 10 years. Thus, the proposed treatment plan could be the basis for a standardized TMZ treatment for LGO patients with survival benefits.This model originates from BioModels Database: A Database of Annotated Published Models (http://www.ebi.ac.uk/biomodels/). It is copyright (c) 2005-2011 The BioModels.net Team.For more information see the terms of use.To cite BioModels Database, please use: Li C, Donizelli M, Rodriguez N, Dharuri H, Endler L, Chelliah V, Li L, He E, Henry A, Stefan MI, Snoep JL, Hucka M, Le Nov\u00e8re N, Laibe C (2010) BioModels Database: An enhanced, curated and annotated resource for published quantitative kinetic models. BMC Syst Biol., 4:92",
- "tags": [
- {
- "id": 2936,
- "tag": "BioModels"
- },
- {
- "id": 4293,
- "tag": "BioModels:BIOMD0000000814"
- },
- {
- "id": 704,
- "tag": "SBML"
- }
- ],
- "timestamp_created": "2025-01-30 14:04:19.963755+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000000814",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3100": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "3",
- "id": 3100,
- "name": "Chrobak2011 - A mathematical model of induced cancer-adaptive immune system competition",
- "repository_type": "biomodels",
- "summary": "
This is a mathematical model describing competition between an artificially induced tumor and the adaptive immune system based on the use of an autonomous system of ordinary differential equations.
",
- "tags": [
- {
- "id": 2936,
- "tag": "BioModels"
- },
- {
- "id": 4294,
- "tag": "BioModels:BIOMD0000000815"
- },
- {
- "id": 3090,
- "tag": "Mus musculus"
- },
- {
- "id": 704,
- "tag": "SBML"
- }
- ],
- "timestamp_created": "2025-01-30 14:04:20.445714+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000000815",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3101": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "6",
- "id": 3101,
- "name": "Gevertz2018 - Cancer Treatment with Oncolytic Viruses and Dendritic Cell injections original model",
- "repository_type": "biomodels",
- "summary": "The model is based on 'Developing a Minimally Structured Mathematical Model of Cancer Treatment with Oncolytic Viruses and Dendritic Cell Injections', PMID:30510594. Author:Jana L.Gevertz and Joanna R.Wares. This model describes the original mathematical model described in section 2.1. Built by COPASI 4.24( Build 197)Abstract:Mathematical models of biological systems must strike a balance between being sufficiently complex to capture important biological features, while being simple enough that they remain tractable through analysis or simulation. In this work, we rigorously explore how to balance these competing interests when modeling murine melanoma treatment with oncolytic viruses and dendritic cell injections. Previously, we developed a system of six ordinary differential equations containing fourteen parameters that well describes experimental data on the efficacy of these treatments. Here, we explore whether this previously developed model is the minimal model needed to accurately describe the data. Using a variety of techniques, including sensitivity analyses and a parameter sloppiness analysis, we find that our model can be reduced by one variable and three parameters and still give excellent fits to the data. We also argue that our model is not too simple to capture the dynamics of the data, and that the original and minimal models make similar predictions about the efficacy and robustness of protocols not considered in experiments. Reducing the model to its minimal form allows us to increase the tractability of the system in the face of parametric uncertainty.",
- "tags": [
- {
- "id": 2936,
- "tag": "BioModels"
- },
- {
- "id": 4295,
- "tag": "BioModels:BIOMD0000000816"
- },
- {
- "id": 3090,
- "tag": "Mus musculus"
- },
- {
- "id": 704,
- "tag": "SBML"
- },
- {
- "id": 4651,
- "tag": "Melanoma"
- }
- ],
- "timestamp_created": "2025-01-30 14:04:20.935689+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000000816",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3102": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "4",
- "id": 3102,
- "name": "Gevertz2018 - cancer treatment with oncolytic viruses and dendritic cell injections minimal model",
- "repository_type": "biomodels",
- "summary": "The model is based on 'Developing a Minimally Structured Mathematical Model of Cancer Treatment with Oncolytic Viruses and Dendritic Cell Injections', PMID:30510594. Author:Jana L.Gevertz and Joanna R.Wares. This model describes the minimal model described in section 2.1. Built by COPASI 4.24( Build 197)Abstract:Mathematical models of biological systems must strike a balance between being sufficiently complex to capture important biological features, while being simple enough that they remain tractable through analysis or simulation. In this work, we rigorously explore how to balance these competing interests when modeling murine melanoma treatment with oncolytic viruses and dendritic cell injections. Previously, we developed a system of six ordinary differential equations containing fourteen parameters that well describes experimental data on the efficacy of these treatments. Here, we explore whether this previously developed model is the minimal model needed to accurately describe the data. Using a variety of techniques, including sensitivity analyses and a parameter sloppiness analysis, we find that our model can be reduced by one variable and three parameters and still give excellent fits to the data. We also argue that our model is not too simple to capture the dynamics of the data, and that the original and minimal models make similar predictions about the efficacy and robustness of protocols not considered in experiments. Reducing the model to its minimal form allows us to increase the tractability of the system in the face of parametric uncertainty.",
- "tags": [
- {
- "id": 2936,
- "tag": "BioModels"
- },
- {
- "id": 4296,
- "tag": "BioModels:BIOMD0000000817"
- },
- {
- "id": 3090,
- "tag": "Mus musculus"
- },
- {
- "id": 704,
- "tag": "SBML"
- },
- {
- "id": 4651,
- "tag": "Melanoma"
- }
- ],
- "timestamp_created": "2025-01-30 14:04:21.428732+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000000817",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3103": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "4",
- "id": 3103,
- "name": "Lee2008 - ERK and PI3K signal integration by Myc",
- "repository_type": "biomodels",
- "summary": "
Mechanisitc model of PI3K and ERK signal integration by Myc. ERK and PI3K regulated Myc satbility by phosphorylating the same. (PMID:18463697)
",
- "tags": [
- {
- "id": 2936,
- "tag": "BioModels"
- },
- {
- "id": 4297,
- "tag": "BioModels:BIOMD0000000818"
- },
- {
- "id": 3114,
- "tag": "Mammalia"
- },
- {
- "id": 704,
- "tag": "SBML"
- }
- ],
- "timestamp_created": "2025-01-30 14:04:21.962713+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000000818",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3104": {
- "auto_sync": true,
- "content_types": "modeling",
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- "default_context": "7",
- "id": 3104,
- "name": "Nazari2018 - IL6 mediated stem cell driven tumor growth and targeted treatment",
- "repository_type": "biomodels",
- "summary": "This a model from the article: A mathematical model for IL-6-mediated, stem cell driven tumor growth and targeted treatmentFereshteh Nazari, Alexander T. Pearson, Jacques Eduardo Nor, Trachette L. Jackson. PloS Computational Biology, 2018 Jan.Abstract:Targeting key regulators of the cancer stem cell phenotype to overcome their critical influence on tumor growth is a promising new strategy for cancer treatment. Here we present a modeling framework that operates at both the cellular and molecular levels, for investigating IL-6 mediated, cancer stem cell driven tumor growth and targeted treatment with anti-IL6 antibodies. Our immediate goal is to quantify the influence of IL-6 on cancer stem cell self-renewal and survival, and to characterize the subsequent impact on tumor growth dynamics. By including the molecular details of IL-6 binding, we are able to quantify the temporal changes in fractional occupancies of bound receptors and their influence on tumor volume. There is a strong correlation between the model output and experimental data for primary tumor xenografts. We also used the model to predict tumor response to administration of the humanized IL-6R monoclonal antibody, tocilizumab (TCZ), and we found that as little as 1mg/kg of TCZ administered weekly for 7 weeks is sufficient to result in tumor reduction and a sustained deceleration of tumor growth.Author Summary:A small population of cancer stem cells that share many of the biological characteristics of normal adult stem cells are believed to initiate and sustain tumor growth for a wide variety of malignancies. Growth and survival of these cancer stem cells is highly influenced by tumor micro-environmental factors and molecular signaling initiated by cytokines and growth factors. This work focuses on quantifying the influence of IL-6, a pleiotropic cytokine secreted by a variety of cell types, on cancer stem cell self-renewal and survival. We present a mathematical model for IL-6 mediated, cancer stem cell driven tumor growth that operates at the following levels: (1) the molecular level\u2014capturing cell surface dynamics of receptor-ligand binding and receptor activation that lead to intra-cellular signal transduction cascades; and (2) the cellular level\u2014describing tumor growth, cellular composition, and response to treatments targeted against IL-6.This model originates from BioModels Database: A Database of Annotated Published Models (http://www.ebi.ac.uk/biomodels/). It is copyright (c) 2005-2011 The BioModels.net Team.For more information see the terms of use.To cite BioModels Database, please use: Li C, Donizelli M, Rodriguez N, Dharuri H, Endler L, Chelliah V, Li L, He E, Henry A, Stefan MI, Snoep JL, Hucka M, Le Nov\u00e8re N, Laibe C (2010) BioModels Database: An enhanced, curated and annotated resource for published quantitative kinetic models. BMC Syst Biol., 4:92.",
- "tags": [
- {
- "id": 2936,
- "tag": "BioModels"
- },
- {
- "id": 4298,
- "tag": "BioModels:BIOMD0000000819"
- },
- {
- "id": 704,
- "tag": "SBML"
- }
- ],
- "timestamp_created": "2025-01-30 14:04:22.442640+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000000819",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3105": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "4",
- "id": 3105,
- "name": "West2019 - Cellular interactions constrain tumor growth",
- "repository_type": "biomodels",
- "summary": "These selections of models are described in the paper:Cellular interactions constrain tumor growthby Jeffrey West and Paul K. NewtonSignificance:A mathematical model relating tumor heterogeneity at the cellular level to tumor growth at the macroscopic level is described based on a statistical mechanics framework. The model takes into account the number of accessible states available to each cell as well as their long-range coupling (population cooperation) to other cells. We show that the degree to which cell populations cooperate determines the number of independent cell states, which in turn dictates the macroscopic (volumetric) growth law. It follows that targeting cell-to-cell interactions or functional coupling among cell populations could be a way of mitigating and controlling tumor growth.Abstract:A tumor is made up of a heterogeneous collection of cell types, all competing on a fitness landscape mediated by microenvironmental conditions that dictate their interactions. Despite the fact that much is known about cell signaling, cellular cooperation, and the functional constraints that affect cellular behavior, the specifics of how these constraints (and the range over which they act) affect the macroscopic tumor growth laws that govern total volume, mass, and carrying capacity remain poorly understood. We develop a statistical mechanics approach that focuses on the total number of possible states each cell can occupy and show how different assumptions on correlations of these states give rise to the many different macroscopic tumor growth laws used in the literature. Although it is widely understood that molecular and cellular heterogeneity within a tumor is a driver of growth, here we emphasize that focusing on the functional coupling of states at the cellular level is what determines macroscopic growth characteristics.",
- "tags": [
- {
- "id": 2936,
- "tag": "BioModels"
- },
- {
- "id": 4299,
- "tag": "BioModels:BIOMD0000000820"
- },
- {
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- }
- ],
- "timestamp_created": "2025-01-30 14:04:22.917807+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000000820",
- "user": {
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- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "3106": {
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- "default_context": "4",
- "id": 3106,
- "name": "Yazdjer2019 - reinforcement learning-based control of tumor growth under anti-angiogenic therapy",
- "repository_type": "biomodels",
- "summary": "This model is based on:Reinforcement learning-based control of tumor growth under anti-angiogenic therapyAuthors: Parisa Yazdjerdi, Nader Meskin, Mohammad Al-Naemi, Ala-Eddin Al Moustafa, Levente KovacsAbstract:Background and objectives: In recent decades, cancer has become one of the most fatal and destructive diseases which is threatening humans life. Accordingly, different types of cancer treatment are studied with the main aim to have the best treatment with minimum side effects. Anti-angiogenic is a molecular targeted therapy which can be coupled with chemotherapy and radiotherapy. Although this method does not eliminate the whole tumor, but it can keep the tumor size in a given state by preventing the formation of new blood vessels. In this paper, a novel model-free method based on reinforcement learning (RL) framework is used to design a closed-loop control of anti-angiogenic drug dosing administration.Methods: A Q-learning algorithm is developed for the drug dosing closed-loop control. This controller is designed using two different values of the maximum drug dosage to reduce the tumor volume up to a desired value. The mathematical model of tumor growth under anti-angiogenic inhibitor is used to simulate a real patient.Results: The effectiveness of the proposed method is shown through in silico simulation and its robustness to patient parameters variation is demonstrated. It is demonstrated that the tumor reaches its minimal volume in 84 days with maximum drug inlet of 30 mg/kg/day. Also, it is shown that the designed controller is robust with respect to \u202f\u00b1\u202f20% of tumor growth parameters changes.Conclusion: The proposed closed-loop reinforcement learning-based controller for cancer treatment using anti-angiogenic inhibitor provides an effective and novel result such that with a clinically valid and safe dosage of drug, the volume reduces up to 1mm3 in a reasonable short period compared to the literature.",
- "tags": [
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- "tag": "BioModels"
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- {
- "id": 4300,
- "tag": "BioModels:BIOMD0000000821"
- },
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- "id": 704,
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- "timestamp_created": "2025-01-30 14:04:23.426316+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000000821",
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- "3107": {
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- "id": 3107,
- "name": "Dorvash2019 - Dynamic modeling of signal transduction by mTOR complexes in cancer",
- "repository_type": "biomodels",
- "summary": "This model is based on:Dynamic modeling of signal transduction by mTOR complexes in cancerAuthor:Mohammadreza Dorvash, Mohammad Farahmandnia, Pouria Mosaddeghi, Mitra Farahmandnejad, Hosein Saber, Mohammadhossein Khorraminejad-Shirazi, Amir Azadi, Iman TavassolyAbstract:Signal integration has a crucial role in the cell fate decision and dysregulation of the cellular signaling pathways is a primary characteristic of cancer. As a signal integrator, mTOR shows a complex dynamical behavior which determines the cell fate at different cellular processes levels, including cell cycle progression, cell survival, cell death, metabolic reprogramming, and aging. The dynamics of the complex responses to rapamycin in cancer cells have been attributed to its differential time-dependent inhibitory effects on mTORC1 and mTORC2, the two main complexes of mTOR. Two explanations were previously provided for this phenomenon: 1-Rapamycin does not inhibit mTORC2 directly, whereas it prevents mTORC2 formation by sequestering free mTOR protein (Le Chatelier\u2019s principle). 2-Components like Phosphatidic Acid (PA) further stabilize mTORC2 compared with mTORC1. To understand the mechanism by which rapamycin differentially inhibits the mTOR complexes in the cancer cells, we present a mathematical model of rapamycin mode of action based on the first explanation, i.e., Le Chatelier\u2019s principle. Translating the interactions among components of mTORC1 and mTORC2 into a mathematical model revealed the dynamics of rapamycin action in different doses and time-intervals of rapamycin treatment. This model shows that rapamycin has stronger effects on mTORC1 compared with mTORC2, simply due to its direct interaction with free mTOR and mTORC1, but not mTORC2, without the need to consider other components that might further stabilize mTORC2. Based on our results, even when mTORC2 is less stable compared with mTORC1, it can be less inhibited by rapamycin.",
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- "id": 4301,
- "tag": "BioModels:BIOMD0000000822"
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- "timestamp_created": "2025-01-30 14:04:23.921672+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000000822",
- "user": {
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- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
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- "username": "osbadmin"
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- "default_context": "3",
- "id": 3108,
- "name": "Varusai2018 - Dynamic modelling of the mTOR signalling network reveals complex emergent behaviours conferred by DEPTOR",
- "repository_type": "biomodels",
- "summary": "
This is a mathematical describing the effect that DEP domain-containing mTOR-interacting protein (DEPTOR) has on the mammalian target of rapamycin (mTOR) signalling network.
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- "tag": "BioModels"
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- "id": 4302,
- "tag": "BioModels:BIOMD0000000823"
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- "id": 3002,
- "tag": "Homo sapiens"
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- "timestamp_created": "2025-01-30 14:04:24.408267+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000000823",
- "user": {
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- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
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- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "3109": {
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- "default_context": "4",
- "id": 3109,
- "name": "Lewkiewics2019 - effects of aging on naive T cell populations and diversity",
- "repository_type": "biomodels",
- "summary": "This model is built by COPASI 4.24(Build197), based on paper:A mathematical model of the effects of aging on naive T-cell population and diversityAuthors:Stephanie Lewkiewicz, Yao-li Chuang, Tom ChouAbstract:The human adaptive immune response is known to weaken in advanced age, resulting in increased severity of pathogen-born illness, poor vaccine efficacy, and a higher prevalence of cancer in the elderly. Age-related erosion of the T cell compartment has been implicated as a likely cause, but the underlying mechanisms driving this immunosenescence have not been quantitatively modeled and systematically analyzed. T cell receptor diversity, or the extent of pathogen-derived antigen responsiveness of the T cell pool, is known to diminish with age, but inherent experimental difficulties preclude accurate analysis on the full organismal level. In this paper, we formulate a mechanistic mathematical model of T cell population dynamics on the immunoclonal subpopulation level, which provides quantitative estimates of diversity. We define different estimates for diversity that depend on the individual number of cells in a specific immunoclone. We show that diversity decreases with age primarily due to diminished thymic output of new T cells and the resulting overall loss of small immunoclones.",
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- "id": 2936,
- "tag": "BioModels"
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- "id": 4303,
- "tag": "BioModels:BIOMD0000000824"
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- "id": 704,
- "tag": "SBML"
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- {
- "id": 4304,
- "tag": "Thymus"
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- "timestamp_created": "2025-01-30 14:04:24.948217+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000000824",
- "user": {
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- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
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- "username": "osbadmin"
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- "3110": {
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- "default_context": "5",
- "id": 3110,
- "name": "Greene2019 - Differentiate Spontaneous and Induced Evolution to Drug Resistance During Cancer Treatment",
- "repository_type": "biomodels",
- "summary": "This model is built by COPASI 4.24(Build 197), based on paper:Mathematical Approach to Differentiate Spontaneous and Induced Evolution to Drug Resistance During Cancer Treatment.Author:James M. Greene, Jana L. Gevertz, Eduardo D. sontagAbstract:PURPOSE:Drug resistance is a major impediment to the success of cancer treatment. Resistance is typically thought to arise from random genetic mutations, after which mutated cells expand via Darwinian selection. However, recent experimental evidence suggests that progression to drug resistance need not occur randomly, but instead may be induced by the treatment itself via either genetic changes or epigenetic alterations. This relatively novel notion of resistance complicates the already challenging task of designing effective treatment protocols. MATERIALS AND METHODS:To better understand resistance, we have developed a mathematical modeling framework that incorporates both spontaneous and drug-induced resistance. RESULTS:Our model demonstrates that the ability of a drug to induce resistance can result in qualitatively different responses to the same drug dose and delivery schedule. We have also proven that the induction parameter in our model is theoretically identifiable and propose an in vitro protocol that could be used to determine a treatment's propensity to induce resistance.",
- "tags": [
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- "id": 2936,
- "tag": "BioModels"
- },
- {
- "id": 4305,
- "tag": "BioModels:BIOMD0000000825"
- },
- {
- "id": 704,
- "tag": "SBML"
- }
- ],
- "timestamp_created": "2025-01-30 14:04:25.443239+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000000825",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "3111": {
- "auto_sync": true,
- "content_types": "modeling",
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- "default_context": "3",
- "id": 3111,
- "name": "Shin_2018_EGFR-PYK2-c-Met interaction network_model",
- "repository_type": "biomodels",
- "summary": "
Systems modelling of the EGFR-PYK2-c-Met interaction network predicted and prioritized synergistic drug combinations for Triple-negative breast cancer
",
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- "id": 2936,
- "tag": "BioModels"
- },
- {
- "id": 4306,
- "tag": "BioModels:BIOMD0000000826"
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- "id": 3002,
- "tag": "Homo sapiens"
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- "id": 704,
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- "timestamp_created": "2025-01-30 14:04:25.948104+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000000826",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "default_context": "4",
- "id": 3112,
- "name": "Ito2019 - gefitnib resistance of lung adenocarcinoma caused by MET amplification",
- "repository_type": "biomodels",
- "summary": "The model is based on publication:Mathematical analysis of gefitinib resistance of lung adenocarcinoma caused by MET amplificationAbstract:Gefitinib, one of the tyrosine kinase inhibitors of epidermal growth factor receptor (EGFR), is effective for treating lung adenocarcinoma harboring EGFR mutation; but later, most cases acquire a resistance to gefitinib. One of the mechanisms conferring gefitinib resistance to lung adenocarcinoma is the amplification of the MET gene, which is observed in 5\u201322% of gefitinib-resistant tumors. A previous study suggested that MET amplification could cause gefitinib resistance by driving ErbB3-dependent activation of the PI3K pathway. In this study, we built a mathematical model of gefitinib resistance caused by MET amplification using lung adenocarcinoma HCC827-GR (gefitinib resistant) cells. The molecular reactions involved in gefitinib resistance consisted of dimerization and phosphorylation of three molecules, EGFR, ErbB3, and MET were described by a series of ordinary differential equations. To perform a computer simulation, we quantified each molecule on the cell surface using flow cytometry and estimated unknown parameters by dimensional analysis. Our simulation showed that the number of active ErbB3 molecules is around a hundred-fold smaller than that of active MET molecules. Limited contribution of ErbB3 in gefitinib resistance by MET amplification is also demonstrated using HCC827-GR cells in culture experiments. Our mathematical model provides a quantitative understanding of the molecular reactions underlying drug resistance.",
- "tags": [
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- "id": 2936,
- "tag": "BioModels"
- },
- {
- "id": 4307,
- "tag": "BioModels:BIOMD0000000827"
- },
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- "id": 704,
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- "timestamp_created": "2025-01-30 14:04:26.470628+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000000827",
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- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "3113": {
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- "content_types": "modeling",
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- "default_context": "11",
- "id": 3113,
- "name": "Jung2019 - Regulating glioblastoma signaling pathways and anti-invasion therapy - core control model",
- "repository_type": "biomodels",
- "summary": "This model is based on paper:Strategies in regulating glioblastoma signaling pathways and anti-invasion therapyAbstract:Glioblastoma multiforme is one of the most invasive type of glial tumors, which rapidly grows and commonly spreads into nearby brain tissue. It is a devastating brain cancer that often results in death within approximately 12 to 15 months after diagnosis. In this work, optimal control theory was applied to regulate intracellular signaling pathways of miR-451\u2013AMPK\u2013mTOR\u2013cell cycle dynamics via glucose and drug intravenous administration infusions. Glucose level is controlled to activate miR-451 in the up-stream pathway of the model. A potential drug blocking the inhibitory pathway of mTOR by AMPK complex is incorporated to explore regulation of the down-stream pathway to the cell cycle. Both miR-451 and mTOR levels are up-regulated inducing cell proliferation and reducing invasion in the neighboring tissues. Concomitant and alternating glucose and drug infusions are explored under various circumstances to predict best clinical outcomes with least administration costs.",
- "tags": [
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- "id": 2936,
- "tag": "BioModels"
- },
- {
- "id": 4308,
- "tag": "BioModels:BIOMD0000000828"
- },
- {
- "id": 704,
- "tag": "SBML"
- }
- ],
- "timestamp_created": "2025-01-30 14:04:26.948136+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000000828",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "3114": {
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- "content_types": "modeling",
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- "default_context": "4",
- "id": 3114,
- "name": "Jung2019 - egulating glioblastoma signaling pathways and anti-invasion therapy cell cycle dynamics model",
- "repository_type": "biomodels",
- "summary": "This model is based on paper, based on its cell cycle dynamics model:Strategies in regulating glioblastoma signaling pathways and anti-invasion therapyAbstract:Glioblastoma multiforme is one of the most invasive type of glial tumors, which rapidly grows and commonly spreads into nearby brain tissue. It is a devastating brain cancer that often results in death within approximately 12 to 15 months after diagnosis. In this work, optimal control theory was applied to regulate intracellular signaling pathways of miR-451\u2013AMPK\u2013mTOR\u2013cell cycle dynamics via glucose and drug intravenous administration infusions. Glucose level is controlled to activate miR-451 in the up-stream pathway of the model. A potential drug blocking the inhibitory pathway of mTOR by AMPK complex is incorporated to explore regulation of the down-stream pathway to the cell cycle. Both miR-451 and mTOR levels are up-regulated inducing cell proliferation and reducing invasion in the neighboring tissues. Concomitant and alternating glucose and drug infusions are explored under various circumstances to predict best clinical outcomes with least administration costs.",
- "tags": [
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- "id": 2936,
- "tag": "BioModels"
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- {
- "id": 4309,
- "tag": "BioModels:BIOMD0000000829"
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- "id": 704,
- "tag": "SBML"
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- "timestamp_created": "2025-01-30 14:04:27.429340+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000000829",
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- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "3115": {
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- "default_context": "6",
- "id": 3115,
- "name": "GiantsosAdams2013 - Growth of glycocalyx under static conditions",
- "repository_type": "biomodels",
- "summary": "
Giantsos-Adams2013 - Growth of glycocalyxunder static conditions
Giantsos-Adams KM, Koo AJ, Song S, Sakai J, Sankaran J, Shin JH, Garcia-Cardena G, Dewey CF.
Cell Mol Bioeng 2013 Jun; 6(2): 160-174
Abstract:
The local hemodynamic shear stress waveforms present in an artery dictate the endothelial cell phenotype. The observed decrease of the apical glycocalyx layer on the endothelium in atheroprone regions of the circulation suggests that the glycocalyx may have a central role in determining atherosclerotic plaque formation. However, the kinetics for the cells' ability to adapt its glycocalyx to the environment have not been quantitatively resolved. Here we report that the heparan sulfate component of the glycocalyx of HUVECs increases by 1.4-fold following the onset of high shear stress, compared to static cultured cells, with a time constant of 19\u00a0h. Cell morphology experiments show that 12\u00a0h are required for the cells to elongate, but only after 36\u00a0h have the cells reached maximal alignment to the flow vector. Our findings demonstrate that following enzymatic degradation, heparan sulfate is restored to the cell surface within 12\u00a0h under flow whereas the time required is 20\u00a0h under static conditions. We also propose a model describing the contribution of endocytosis and exocytosis to apical heparan sulfate expression. The change in HS regrowth kinetics from static to high-shear EC phenotype implies a differential in the rate of endocytic and exocytic membrane turnover.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
This a model from the article: Hypothalamic regulation of pituitary secretion of luteinizing hormone.II. Feedback control of gonadotropin secretion. Smith WR Bull Math Biol. (1980) 42(1): 57-78 6986927 , Abstract: No Abstract Available
This model was taken from the CellML repository and automatically converted to SBML. The original model was: smith,1980,version02 The original CellML model was created by: Lloyd, Catherine, May c.lloyd@auckland.ac.nz The University of Auckland Auckland Bioengineering Institute
This model originates from BioModels Database: A Database of Annotated Published Models (http://www.ebi.ac.uk/biomodels/). It is copyright (c) 2005-2011 The BioModels.net Team. To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
In summary, you are entitled to use this encoded model in absolutely any manner you deem suitable, verbatim, or with modification, alone or embedded it in a larger context, redistribute it, commercially or not, in a restricted way or not..
This is a mathematical model describing Hippo signalling pathway activity. It includes descriptions of crosstalk with the Akt and ERK MAPK pathways; crosstalk activity is described using complex regulatory mechanisms comprised of competitive protein-protein interactions and phosphorylation mediated feedback loops.
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- "tag": "BioModels:BIOMD0000000832"
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- "id": 3002,
- "tag": "Homo sapiens"
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- "timestamp_created": "2025-01-30 14:04:28.899377+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000000832",
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- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3118": {
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- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "7",
- "id": 3118,
- "name": "DiCamillo2016 - Insulin signalling pathway - Rule-based model",
- "repository_type": "biomodels",
- "summary": "Barbara Di Camillo, Azzurra Carlon, Federica Eduati & Gianna Maria Toffolo. A rule-based model of insulin signalling pathway. BMC Systems Biology 10, 1 (2016).The insulin signalling pathway (ISP) is an important biochemical pathway, which regulates some fundamental biological functions such as glucose and lipid metabolism, protein synthesis, cell proliferation, cell differentiation and apoptosis. In the last years, different mathematical models based on ordinary differential equations have been proposed in the literature to describe specific features of the ISP, thus providing a description of the behaviour of the system and its emerging properties. However, protein-protein interactions potentially generate a multiplicity of distinct chemical species, an issue referred to as \"combinatorial complexity\", which results in defining a high number of state variables equal to the number of possible protein modifications. This often leads to complex, error prone and difficult to handle model definitions.",
- "tags": [
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- "id": 2936,
- "tag": "BioModels"
- },
- {
- "id": 4313,
- "tag": "BioModels:BIOMD0000000833"
- },
- {
- "id": 704,
- "tag": "SBML"
- }
- ],
- "timestamp_created": "2025-01-30 14:04:29.394318+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000000833",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "3119": {
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- "default_context": "6",
- "id": 3119,
- "name": "Verma2016 - Ca(2+) Signal Propagation Along Hepatocyte Cords",
- "repository_type": "biomodels",
- "summary": "
Verma2016 - Ca(2+) Signal Propagation Along Hepatocyte Cords
Verma A, Makadia H, Hoek JB, Ogunnaike BA, Vadigepalli R.
IEEE Trans Biomed Eng 2016 Oct; 63(10): 2047-2055
Abstract:
The purpose of this study is to model the dynamics of lobular Ca(2+) wave propagation induced by an extracellular stimulus, and to analyze the effect of spatially systematic variations in cell-intrinsic signaling parameters on sinusoidal Ca(2+) response.We developed a computational model of lobular scale Ca(2+) signaling that accounts for receptor- mediated initiation of cell-intrinsic Ca(2+) signal in hepatocytes and its propagation to neighboring hepatocytes through gap junction-mediated molecular exchange.Analysis of the simulations showed that a pericentral-to-periportal spatial gradient in hormone sensitivity and/or rates of IP3 synthesis underlies the Ca(2+) wave propagation. We simulated specific cases corresponding to localized disruptions in the graded pattern of these parameters along a hepatic sinusoid. Simulations incorporating locally altered parameters exhibited Ca(2+) waves that do not propagate throughout the hepatic plate. Increased gap junction coupling restored normal Ca(2+) wave propagation when hepatocytes with low Ca(2+) signaling ability were localized in the midlobular or the pericentral region.Multiple spatial patterns in intracellular signaling parameters can lead to Ca(2+) wave propagation that is consistent with the experimentally observed spatial patterns of Ca(2+) dynamics. Based on simulations and analysis, we predict that increased gap junction-mediated intercellular coupling can induce robust Ca(2+) signals in otherwise poorly responsive hepatocytes, at least partly restoring the sinusoidally oriented Ca (2+) waves.Our bottom-up model of agonist-evoked spatial Ca(2+) patterns can be integrated with detailed descriptions of liver histology to study Ca(2+) regulation at the tissue level.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
This represents the reduced version of the \"time course model\" of Van Eunen et al (2013): Biochemical competition makes fatty-acid beta-oxidation vulnerable to substrate overload. The SBML was created from that of the original model and produces identical results when a time-course of 25 mins is run in COPASI
This model is from the article: Epidemics of panic during a bioterrorist attack--a mathematical model. Radosavljevic V, Radunovic D, Belojevic G. Med Hypotheses 2009 Sep;73(3):342-6 19423234 , Abstract: A bioterrorist attacks usually cause epidemics of panic in a targeted population. We have presented epidemiologic aspect of this phenomenon as a three-component model--host, information on an attack and social network. We have proposed a mathematical model of panic and counter-measures as the function of time in a population exposed to a bioterrorist attack. The model comprises ordinary differential equations and graphically presented combinations of the equations parameters. Clinically, we have presented a model through a sequence of psychic conditions and disorders initiated by an act of bioterrorism. This model might be helpful for an attacked community to timely and properly apply counter-measures and to minimize human mental suffering during a bioterrorist attack.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
In summary, you are entitled to use this encoded model in absolutely any manner you deem suitable, verbatim, or with modification, alone or embedded it in a larger context, redistribute it, commercially or not, in a restricted way or not.
This model provides an in silico mathematical platform to explore the interactions between chimeric antigen receptor-modified T cells, inflammatory toxicitiy, and the tumour burdens of individual patients.
This is a simple mathematical population model for pembrolizumab-treated advanced melanoma patients, used to predict the response of melanoma patients to immune checkpoint inhibitors.
This is a transcriptional-based mathematical model centered on linear combinations of the clock controlled elements (CCEs): E-box, R-box and D-box, used to identify the essential interactions needed to generate phase opposition between the activating CLOCK:BMAL1 and the repressing PER:CRY complexes.
This is a mathematical model of Vicodin use and abuse used to investigate methods of combating Vicodin abuse in a population of patients who have obtained the drug through prescription. Mathematical descriptions of transitions through acute, chronic, abusive, and in-treatment populations are included.
This is a delay differential equation model showing how non-coding RNA, acting as microRNA (miRNA) sponges in a conserved RNA-transcription factor feedback motif, can five rise to oscillatory behaviour.
This model is from the article: Competing G protein-coupled receptor kinases balance G protein and \u03b2-arrestin signaling Heitzler D, Durand G, Gallay N, Rizk A, Ahn S, Kim J, Violin JD, Dupuy L, Gauthier C, Piketty V, Cr\u00e9pieux P, Poupon A, Cl\u00e9ment F, Fages F, Lefkowitz RJ, Reiter E. Mol Syst Biol. 2012; 8: 590. 22735336 , Abstract: Seven-transmembrane receptors (7TMRs) are involved in nearly all aspects of chemical communications and represent major drug targets. 7TMRs transmit their signals not only via heterotrimeric G proteins but also through \u03b2-arrestins, whose recruitment to the activated receptor is regulated by G protein-coupled receptor kinases (GRKs). In this paper, we combined experimental approaches with computational modeling to decipher the molecular mechanisms as well as the hidden dynamics governing extracellular signal-regulated kinase (ERK) activation by the angiotensin II type 1A receptor (AT(1A)R) in human embryonic kidney (HEK)293 cells. We built an abstracted ordinary differential equations (ODE)-based model that captured the available knowledge and experimental data. We inferred the unknown parameters by simultaneously fitting experimental data generated in both control and perturbed conditions. We demonstrate that, in addition to its well-established function in the desensitization of G-protein activation, GRK2 exerts a strong negative effect on \u03b2-arrestin-dependent signaling through its competition with GRK5 and 6 for receptor phosphorylation. Importantly, we experimentally confirmed the validity of this novel GRK2-dependent mechanism in both primary vascular smooth muscle cells naturally expressing the AT(1A)R, and HEK293 cells expressing other 7TMRs.
This is a mathematical model of Hsp70 induction. To model heat shock effects, the model incorporates temperature dependencies in transcirption to Hsp70 mRNA and in dissociation of transcriptional complexes, in addition to a formal expression relating temperature to protein denaturation.
This is a mathematical conductance-based model of the bursting activity in external tufted (ET) cells of the olfactory bulb. The model includes ion-current based descriptions of the mechanisms underlying bursting in ET cells, with facilitation of blocking various currents to characterise bursting behaviour.
This is a mathematical model of phenylalanine metabolism in plants as influenced by shikimate, with specific evidence of how shikimate dynamics influence phenylalanine metabolism as a function of phenylalanine availability.
This is a mathematical model describing the dynamics of the immune response to hepatitis B, which takes into account contributions form innate and adaptive immune responses, as well as cytokines.
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- "name": "Potassium balance in lactating and non-lactating dairy cows",
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- "summary": "M. Berg, J. Pl\u00f6ntzke, S. Leonhard-Marek, K.E. M\u00fcller & S. R\u00f6blitz. A dynamic model to simulate potassium balance in dairy cows. Journal of Dairy Science 100, 12 (2017).High-performing dairy cows require a particular composition of nutritional ingredients, adapted to their individual requirements and depending on their production status. The optimal dimensioning of minerals in the diet, one being potassium, is indispensable for the prevention of imbalances. Potassium balance in cows is the result of potassium intake, distribution in the organism, and excretion, and it is closely related to glucose and electrolyte metabolism. In this paper, we present a dynamical model for potassium balance in lactating and nonlactating dairy cows based on ordinary differential equations. Parameter values were obtained from clinical trial data and from the literature. To verify the consistency of the model, we present simulation outcomes for 3 different scenarios: potassium balance in (1) nonlactating cows with varying feed intake, (2) nonlactating cows with varying potassium fraction in the diet, and (3) lactating cows with varying milk production levels. The results give insights into the short- and long-term potassium metabolism, providing an important step toward the understanding of the potassium network, the design of prophylactic feed additives, and possible treatment strategies.",
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This is a mathematical model using a Gompertz growth law to describe the in vivo dynamics of a cancer under treatment with an oncolytic virus.
This is the simple version of the two mathematical models presented by Ho et al. It is a model comprised of simple ordinary differential equations describing the overall epidemic dynamics of influenza infection in the 2017-2018 winter influenza season in Hong Kong.
This is a mathematical model investigating the role of chronic inflammation in the development and progression of myeloproliferative neoplasms (MPNs). The model describes the proliferation from stem cells to mature cells, including mutations of healthy stem cells to become malignant stem cells. The model also features a simple inflammatory coupling coping with cell death and affecting the basic model beneath.
This is a mathematical model describing the formation of long-term potentiation (LTP) at the Schaffer collateral of CA1 pyramidal cell synapse. The model consists of nine ordinary differential equations that denote synaptic states associated with different degrees of LTP, as well as the levels of regulatory proteins involved in the formation and maintenance of LTP.
This is a simple, linear, four-compartment ordinary differential equation (ODE) model Akt activation that tracks both the phosphorylation state and the physical location (cytosol, plasma membrane) of Akt.
This is an ordinary differential equation-based mathematical model describing the inflammatory phase of the wound healing response. The model describes the interactions in the wound between wound debris, pathogens, neutrophils and macrophages, as well as the modulation of these interactions by estrogen and cortisol.
This model is decribed in the article:Dilution and titration of cell-cycle regulators may control cell size in budding yeastFrank S. Heldt, Reece Lunstone, John J. Tyson, Bela NovakPLoS Comput Biol, October 2018, 14(10), e1006548, doi: 10.1371/journal.pcbi.1006548Abstract:The size of a cell sets the scale for all biochemical processes within it, thereby affecting cellular fitness and survival. Hence, cell size needs to be kept within certain limits and relatively constant over multiple generations. However, how cells measure their size and use this information to regulate growth and division remains controversial. Here, we present two mechanistic mathematical models of the budding yeast (S. cerevisiae) cell cycle to investigate competing hypotheses on size control: inhibitor dilution and titration of nuclear sites. Our results suggest that an inhibitor-dilution mechanism, in which cell growth dilutes the transcriptional inhibitor Whi5 against the constant activator Cln3, can facilitate size homeostasis. This is achieved by utilising a positive feedback loop to establish a fixed size threshold for the START transition, which efficiently couples cell growth to cell cycle progression. Yet, we show that inhibitor dilution cannot reproduce the size of mutants that alter the cell\u2019s overall ploidy and WHI5 gene copy number. By contrast, size control through titration of Cln3 against a constant number of genomic binding sites for the transcription factor SBF recapitulates both size homeostasis and the size of these mutant strains. Moreover, this model produces an imperfect \u2018sizer\u2019 behaviour in G1 and a \u2018timer\u2019 in S/G2/M, which combine to yield an \u2018adder\u2019 over the whole cell cycle; an observation recently made in experiments. Hence, our model connects these phenomenological data with the molecular details of the cell cycle, providing a systems-level perspective of budding yeast size control.
This is a global mathematical model describing metabolic partitioning of carbon resources in plants between growth and defense, as a function of nitrate fertilization. The model hinges on the dynamics of sucrose inflow/outflow properties.
This is a global mathematical model describing metabolic partitioning of carbon resources in plants between growth and defense, as a function of nitrate fertilization. The model hinges on the dynamics of sucrose inflow/outflow properties. The model also accounts for variations in photosynthetic activity as dictated by a daily light/dark cycle.
This is a global mathematical model describing metabolic partitioning of carbon resources in plants between growth and defense, as a function of nitrate fertilization. The model hinges on the dynamics of sucrose inflow/outflow properties. The model also accounts for variations in photosynthetic activity as dictated by a daily light/dark cycle. Furthermore, the adaptive changes in starch metabolism that occur with changing light durations (short days vs long days) are also investigated.
The aim of this study was to show how computational models can be used to increase our understanding of the role of microRNAs in osteoarthritis (OA) using miR-140 as an example. Bioinformatics analysis and experimental results from the literature were used to create and calibrate models of gene regulatory networks in OA involving miR-140 along with key regulators such as NF-?B, SMAD3, and RUNX2. The individual models were created with the modelling standard, Systems Biology Markup Language, and integrated to examine the overall effect of miR-140 on cartilage homeostasis. Down-regulation of miR-140 may have either detrimental or protective effects for cartilage, indicating that the role of miR-140 is complex. Studies of individual networks in isolation may therefore lead to different conclusions. This indicated the need to combine the five chosen individual networks involving miR-140 into an integrated model. This model suggests that the overall effect of miR-140 is to change the response to an IL-1 stimulus from a prolonged increase in matrix degrading enzymes to a pulse-like response so that cartilage degradation is temporary. Our current model can easily be modified and extended as more experimental data become available about the role of miR-140 in OA. In addition, networks of other microRNAs that are important in OA could be incorporated. A fully integrated model could not only aid our understanding of the mechanisms of microRNAs in ageing cartilage but could also provide a useful tool to investigate the effect of potential interventions to prevent cartilage loss.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
This is a dynamic pathway model examining the roles of of the two transcriptional negative feedback regulators of the suppressor of cytokine signaling (SOCS) family, CIS and SOCS3, in JAK/STAT5 signaling, within the context of primary erythroid progenitor cells.
The aim of this study was to show how computational models can be used to increase our understanding of the role of microRNAs in osteoarthritis (OA) using miR-140 as an example. Bioinformatics analysis and experimental results from the literature were used to create and calibrate models of gene regulatory networks in OA involving miR-140 along with key regulators such as NF-?B, SMAD3, and RUNX2. The individual models were created with the modelling standard, Systems Biology Markup Language, and integrated to examine the overall effect of miR-140 on cartilage homeostasis. Down-regulation of miR-140 may have either detrimental or protective effects for cartilage, indicating that the role of miR-140 is complex. Studies of individual networks in isolation may therefore lead to different conclusions. This indicated the need to combine the five chosen individual networks involving miR-140 into an integrated model. This model suggests that the overall effect of miR-140 is to change the response to an IL-1 stimulus from a prolonged increase in matrix degrading enzymes to a pulse-like response so that cartilage degradation is temporary. Our current model can easily be modified and extended as more experimental data become available about the role of miR-140 in OA. In addition, networks of other microRNAs that are important in OA could be incorporated. A fully integrated model could not only aid our understanding of the mechanisms of microRNAs in ageing cartilage but could also provide a useful tool to investigate the effect of potential interventions to prevent cartilage loss.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
The aim of this study was to show how computational models can be used to increase our understanding of the role of microRNAs in osteoarthritis (OA) using miR-140 as an example. Bioinformatics analysis and experimental results from the literature were used to create and calibrate models of gene regulatory networks in OA involving miR-140 along with key regulators such as NF-?B, SMAD3, and RUNX2. The individual models were created with the modelling standard, Systems Biology Markup Language, and integrated to examine the overall effect of miR-140 on cartilage homeostasis. Down-regulation of miR-140 may have either detrimental or protective effects for cartilage, indicating that the role of miR-140 is complex. Studies of individual networks in isolation may therefore lead to different conclusions. This indicated the need to combine the five chosen individual networks involving miR-140 into an integrated model. This model suggests that the overall effect of miR-140 is to change the response to an IL-1 stimulus from a prolonged increase in matrix degrading enzymes to a pulse-like response so that cartilage degradation is temporary. Our current model can easily be modified and extended as more experimental data become available about the role of miR-140 in OA. In addition, networks of other microRNAs that are important in OA could be incorporated. A fully integrated model could not only aid our understanding of the mechanisms of microRNAs in ageing cartilage but could also provide a useful tool to investigate the effect of potential interventions to prevent cartilage loss.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
This is a mathematical mechanistic immunobiochemical model that incorporates T cell pathways that control programmed cell death protein 1 (PD-1) expression. A core component of the model is a kinetic motif, termed a PD-1 Double Incoherent Feed-Forward Loop (DIFFL), which reflects known interactions between IRF4, Blimp-1, and Bcl-6.
This model represents NIK-dependent p100 processing into p52 with Michaelis-Menten kinetics. While this model shows identical dose-response to the mass action representation, when IkBd degradation is included the dose-response is no-longer monotonic in mass action models due to substrate complex competition.
This is a mathematical model comprised of non-linear ordinary differential equations describing the dynamic relationship between hypoxia-inducible factor-1 alpha (HIF-1a) mRNA, HIF-1a protein, and interleukin-15-mediated upstream signalling events in natural killer cells from human blood. Regulatory expressions are also included for mammalian target of rapamycin (mTOR), nuclear factor-kappa beta, and signal transducer and activator of transcription 3 (STAT3).
This model represents NIK-dependent p100 processing into p52 with mass action kinetics. While this model shows identical dose-response to the Michaelis-Menten representation, when IkBd degradation is included the dose-response is no longer monotonic in mass action models due to substrate complex competition.
This model represents NIK-dependent p100 processing into p52 and NIK-dependent IkBd degradation with Michaelis-Menten kinetics. Compare this Michaelis-Menten representation to the mass action model in which the dose-response to increasing p100 mRNA is no longer monotonic due to substrate complex competition.
This model represents NIK-dependent p100 processing into p52 and NIK-dependent IkBd degradation with mass action kinetics. Compare this mass action representation to the Michaelis-Menten model. In this model the dose-response to increasing p100 mRNA is not monotonic due to substrate complex competition.
This model represents NIK-dependent p100 processing into p52 followed by binding to RelB and NIK-dependent IkBd degradation. This model assesses the impact of substrate complex competition on RelB-p52.
This is a COPASI version of the HIV/HPV coinfection model submitted to PLoS One.Title: Modeling the mechanisms by which HIV-associated immunosuppression influences HPV persistence at the oral mucosaAuthors: Meghna Verma*, Samantha Erwin*, Vida Abedi, Raque Hontecillas, Stefan Hoops, Andrew Leber, Josep Bassaganya-Riera, Stanca Ciupe* Contributed equally to the workCorresponding Authors: Josep Bassaganya-Riera and Stanca Ciupe
IL-6 has been proposed to favor the development of Th2 responses and play an important role in the communication between cells of multicellular organisms. They are involved in the regulation of complex cellular processes such as proliferation, differentiation and act as key player during inflammation and immune response. Th2 cytokines play an immunoregulatory role in early infection. Literature says in mice infected with L. major, IL-6 may promote the development of both Th1 and Th2 responses. IL-4 is also considered to be the signature cytokine of Th-2 response. IL6 was initially characterized as a Th1 cytokine but later on it was proved to be a pleiotropic cytokine, secreted from different cell types including the macrophages. A major challenge is to understand how these complex non-linear processes are connected and regulated. Systems biology approaches may be used to tackle this challenge in an iterative process of quantitative mathematical analysis. In this study, we created an in silico model of IL6 mediated macrophage activation which suffers from an excessive impact of the negative feedback loop involving SOCS1. The strategy adopted in this framework may help to reduce the complexity of the leishmanial IL6 model analysis and also laydown various physiological or pathological conditions of IL6 signaling in future.
This a model from the article: Dynamics of HIV infection of CD4+ T cells. Perelson AS, Kirschner DE, De Boer R. Math Biosci 1993 Mar;114(1):81-125 8096155 , Abstract: We examine a model for the interaction of HIV with CD4+ T cells that considersfour populations: uninfected T cells, latently infected T cells, activelyinfected T cells, and free virus. Using this model we show that many of thepuzzling quantitative features of HIV infection can be explained simply. We alsoconsider effects of AZT on viral growth and T-cell population dynamics. Themodel exhibits two steady states, an uninfected state in which no virus ispresent and an endemically infected state, in which virus and infected T cellsare present. We show that if N, the number of infectious virions produced peractively infected T cell, is less a critical value, Ncrit, then the uninfectedstate is the only steady state in the nonnegative orthant, and this state isstable. For N > Ncrit, the uninfected state is unstable, and the endemicallyinfected state can be either stable, or unstable and surrounded by a stablelimit cycle. Using numerical bifurcation techniques we map out the parameterregimes of these various behaviors. oscillatory behavior seems to lie outsidethe region of biologically realistic parameter values. When the endemicallyinfected state is stable, it is characterized by a reduced number of T cellscompared with the uninfected state. Thus T-cell depletion occurs through theestablishment of a new steady state. The dynamics of the establishment of thisnew steady state are examined both numerically and via the quasi-steady-stateapproximation. We develop approximations for the dynamics at early times inwhich the free virus rapidly binds to T cells, during an intermediate time scalein which the virus grows exponentially, and a third time scale on which viralgrowth slows and the endemically infected steady state is approached. Using thequasi-steady-state approximation the model can be simplified to two ordinarydifferential equations the summarize much of the dynamical behavior. We computethe level of T cells in the endemically infected state and show how that levelvaries with the parameters in the model. The model predicts that different viralstrains, characterized by generating differing numbers of infective virionswithin infected T cells, can cause different amounts of T-cell depletion andgenerate depletion at different rates. Two versions of the model are studied. Inone the source of T cells from precursors is constant, whereas in the other thesource of T cells decreases with viral load, mimicking the infection and killingof T-cell precursors.(ABSTRACT TRUNCATED AT 400 WORDS)
This model originates from BioModels Database: A Database of Annotated Published Models (http://www.ebi.ac.uk/biomodels/). It is copyright (c) 2005-2011 The BioModels.net Team. To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
In summary, you are entitled to use this encoded model in absolutely any manner you deem suitable, verbatim, or with modification, alone or embedded it in a larger context, redistribute it, commercially or not, in a restricted way or not..
This is the general model without delay described by the equation system (1) in: A model of HIV-1 pathogenesis that includes an intracellular delay. Nelson PW, Murray JD, Perelson AS; Math Biosci. 2000 Feb;163(2):201-15. PMID: 10701304 ; doi: 10.1016/S0025-5564(99)00055-3 Abstract: Mathematical modeling combined with experimental measurements have yielded important insights into HIV-1 pathogenesis. For example, data from experiments in which HIV-infected patients are given potent antiretroviral drugs that perturb the infection process have been used to estimate kinetic parameters underlying HIV infection. Many of the models used to analyze data have assumed drug treatments to be completely efficacious and that upon infection a cell instantly begins producing virus. We consider a model that allows for less then perfect drug effects and which includes a delay in the initiation of virus production. We present detailed analysis of this delay differential equation model and compare the results to a model without delay. Our analysis shows that when drug efficacy is less than 100%, as may be the case in vivo, the predicted rate of decline in plasma virus concentration depends on three factors: the death rate of virus producing cells, the efficacy of therapy, and the length of the delay. Thus, previous estimates of infected cell loss rates can be improved upon by considering more realistic models of viral infection. Author Keywords: HIV; Delay; Viral life cycle; T-cells
As there are no results given for this model in the article it cannot be checked for MIRIAM compliance. The SBML file should be equivalent to the described ODE file though.
This model originates from BioModels Database: A Database of Annotated Published Models. It is copyright (c) 2005-2011 The BioModels.net Team. To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
In summary, you are entitled to use this encoded model in absolutely any manner you deem suitable, verbatim, or with modification, alone or embedded it in a larger context, redistribute it, commercially or not, in a restricted way or not..
This is a mathematical model comprised of a simple system of four ordinary differential equations that account for the two opposing roles of infected and healthy cytotoxic T lymphocytes within the context of HIV infection, with each type responsible for the production of virus and the activation and stimulation of immune responses, respectively.
This is a mathematical model describing the treatment of tumors using oncolytic virus and chemotherapy. The model is comprised of nonlinear ordinary differential equations describing the interactions between uninfected tumor cells, infected tumor cells, an oncolytic virus, and chemotherapy.
This a model from the article: Modeling insulin kinetics: responses to a single oral glucose administration or ambulatory-fed conditions. Lenbury Y, Ruktamatakul S, Amornsamarnkul S. Biosystems. 2001 Jan;59(1):15-25. 11226623 , Abstract: This paper presents a nonlinear mathematical model of the glucose-insulin feedback system, which has been extended to incorporate the beta-cells' function on maintaining and regulating plasma insulin level in man. Initially, a gastrointestinal absorption term for glucose is utilized to effect the glucose absorption by the intestine and the subsequent release of glucose into the bloodstream, taking place at a given initial rate and falling off exponentially with time. An analysis of the model is carried out by the singular perturbation technique in order to derive boundary conditions on the system parameters which identify, in particular, the existence of limit cycles in our model system consistent with the oscillatory patterns often observed in clinical data. We then utilize a sinusoidal term to incorporate the temporal absorption of glucose in order to study the responses in the patients under ambulatory-fed conditions. A numerical investigation is carried out in this case to construct a bifurcation diagram to identify the ranges of parametric values for which chaotic behavior can be expected, leading to interesting biological interpretations.
This model was taken from the CellML repository and automatically converted to SBML. The original model was: lenbury_ruktamatakul_amornsamarnkul_2001_A The original CellML model was created by: Catherine Lloyd c.lloyd@aukland.ac.nz The University of Auckland The Bioengineering Institute
This model originates from BioModels Database: A Database of Annotated Published Models (http://www.ebi.ac.uk/biomodels/). It is copyright (c) 2005-2011 The BioModels.net Team. To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
In summary, you are entitled to use this encoded model in absolutely any manner you deem suitable, verbatim, or with modification, alone or embedded it in a larger context, redistribute it, commercially or not, in a restricted way or not..
THis is a simple ordinary differential equation model describing chemoimmunotherapy of chronic lymphocytic leukemia, including descriptions of the combinatorial effects of chemotherapy and adoptive cellular immunotherapy.
This is a mathematical model of a growing tumor and its interaction with the immune system. The model consists of four populations: tumor cells, dendritic cells (representing the innate immune system), cytotoxic T cells, and helper T cells (as the specific immune system). The model is comprised of a system of ordinary differential equations.
This is a mathematical model describing the imbalance between T helper (Th1/Th2) cell types in melanome patients, together with its regulation via IL-12 treatment. The model focuses on the interactions between the two T helper cell types as mediated by their respective key cytokines, interferon gamma and IL-10.
Munz2009 - Zombie SIZRC This is the model with an latent infection and cure for zombies described in the article. This model was originally created by libAntimony v1.4 (using libSBML 3.4.1). This model is described in the article: When zombies attack!: Mathematical modelling of an outbreak of zombie infection P. Munz, I. Hudea, J. Imad and R.J. Smith? Infectious Disease Modelling Research Progress 2009, chapter 4, pp 133-150. Editors: Jean Michel Tchuenche and C. Chiyaka; Nova Science Publishers, Inc., NY, USA. Abstract: Zombies are a popular figure in pop culture/entertainment and they are usually portrayed as being brought about through an outbreak or epidemic. Consequently, we model a zombie attack, using biological assumptions based on popular zombie movies. We introduce a basic model for zombie infection, determine equilibria and their stability, and illustrate the outcome with numerical solutions. We then refine the model to introduce a latent period of zombification, whereby humans are infected, but not infectious, before becoming undead. We then modify the model to include the effects of possible quarantine or a cure. Finally, we examine the impact of regular, impulsive reductions in the number of zombies and derive conditions under which eradication can occur. We show that only quick, aggressive attacks can stave off the doomsday scenario: the collapse of society as zombies overtake us all. This model is hosted on BioModels Database and identified by: MODEL1008060001 . To cite BioModels Database, please use: BioModels Database: An enhanced, curated and annotated resource for published quantitative kinetic models . To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
Optimality of the spontaneous prophage induction rate.Cortes MG1, Krog J2, Bal\u00e1zsi G3.1 Department of Applied Mathematics and Statistics, Stony Brook University, Stony Brook, NY 11794, USA.2 The Louis and Beatrice Laufer Center for Physical and Quantitative Biology, Stony Brook University, Stony Brook, NY 11794, USA.3 Department of Biomedical Engineering, Stony Brook University, Stony Brook, NY 11794, USA. Electronic address: gabor.balazsi@stonybrook.edu.AbstractLysogens are bacterial cells that have survived after genomically incorporating the DNA of temperate bacteriophages infecting them. If an infection results in lysogeny, the lysogen continues to grow and divide normally, seemingly unaffected by the integrated viral genome known as a prophage. However, the prophage can still have an impact on the host's phenotype and overall fitness in certain environments. Additionally, the prophage within the lysogen can activate the lytic pathway via spontaneous prophage induction (SPI), killing the lysogen and releasing new progeny phages. These new phages can then lyse or lysogenize other susceptible nonlysogens, thereby impacting the competition between lysogens and nonlysogens. In a scenario with differing growth rates, it is not clear whether SPI would be beneficial or detrimental to the lysogens since it kills the host cell but also attacks nonlysogenic competitors, either lysing or lysogenizing them. Here we study the evolutionary dynamics of a mixture of lysogens and nonlysogens and derive general conditions on SPI rates for lysogens to displace nonlysogens. We show that there exists an optimal SPI rate for bacteriophage \u03bb and explain why it is so low. We also investigate the impact of stochasticity and conclude that even at low cell numbers SPI can still provide an advantage to the lysogens. These results corroborate recent experimental studies showing that lower SPI rates are advantageous for phage-phage competition, and establish theoretical bounds on the SPI rate in terms of ecological and environmental variables associated with lysogens having a competitive advantage over their nonlysogenic counterparts.Copyright \u00a9 2019 The Author(s). Published by Elsevier Ltd.. All rights reserved.
Mathematical modeling of cancer-immune system, considering the role of antibodies.Ghosh S1, Banerjee S2.Author information1 Department of Mathematics, Indian Institute of Technology Roorkee, Roorkee, Uttaranchal, 247667, India.2 Department of Mathematics, Indian Institute of Technology Roorkee, Roorkee, Uttaranchal, 247667, India. sandofma@iitr.ac.in.AbstractA mathematical model for the quantitative analysis of cancer-immune interaction, considering the role of antibodies has been proposed in this paper. The model is based on the clinical evidence, which states that antibodies can directly kill cancerous cells (Ivano et al. in J Clin Investig 119(8):2143-2159, 2009). The existence of transcritical bifurcation, which has been proved using Sotomayor theorem, provides strong biological implications. Through numerical simulations, it has been illustrated that under certain therapy (like monoclonal antibody therapy), which is capable of altering the parameters of the system, cancer-free state can be obtained.KEYWORDS:Antibodies; B cells; Cancer cells; Global stability; Plasma cells; Transcritical bifurcation
MODELING THE INTERACTION BETWEEN AVASCULAR CANCEROUS CELLS AND ACQUIRED IMMUNE RESPONSEB. DUBEY, UMA S. DUBEY and SANDIP BANERJEEAbstractThis paper deals with the interaction between dispersed cancer cells and the major populations of the immune system, namely, the T helper cells, T Cytotoxic cells, B cells, and antibodies produced. The system is described by a set of five ordinary differential equations. Both local and global stability of the system has been investigated. It has been observed that under appropriate conditions this interaction is capable of controlling the growth of these cancer cells. The analytical findings are supported by numerical and computational analytical methods.
This is a four-dimensional, non-linear system of ordinary differential equations that describes the dynamic interactions among viral expression, infected target cell activation, and the HTLV-I-specific CTL response.
Mathematical Modeling, Analysis, and Simulation of Tumor Dynamics with Drug InterventionsPranav Unni 1 and Padmanabhan SeshaiyerAbstractOver the last few decades, there have been significant developments in theoretical, experimental, and clinical approaches to understand the dynamics of cancer cells and their interactions with the immune system. These have led to the development of important methods for cancer therapy including virotherapy, immunotherapy, chemotherapy, targeted drug therapy, and many others. Along with this, there have also been some developments on analytical and computational models to help provide insights into clinical observations. This work develops a new mathematical model that combines important interactions between tumor cells and cells in the immune systems including natural killer cells, dendritic cells, and cytotoxic CD8+ T cells combined with drug delivery to these cell sites. These interactions are described via a system of ordinary differential equations that are solved numerically. A stability analysis of this model is also performed to determine conditions for tumor-free equilibrium to be stable. We also study the influence of proliferation rates and drug interventions in the dynamics of all the cells involved. Another contribution is the development of a novel parameter estimation methodology to determine optimal parameters in the model that can reproduce a given dataset. Our results seem to suggest that the model employed is a robust candidate for studying the dynamics of tumor cells and it helps to provide the dynamic interactions between the tumor cells, immune system, and drug-response systems.
This is an ordinary differential equation mathematical model investigating the early responses of human monocyte-derived dendritic cells to infection by two H1N1 influenza A viruses of different clinical outcomes: pandemic A/California/4/2009 and seasonal A/New Caledonia/20/1999.
This is a deterministic nonlinear ordinary differential equation mathematical model of the sterol regulatory element binding protein 2 (SREBP-2) cholesterol genetic regulatory pathway in a hepatocyte.
Stability Analysis of a Mathematical Model for Glioma-Immune Interaction under Optimal TherapySubhas KhajanchiAbstractWe investigate a mathematical model using a system of coupled ordinary differential equations, which describes the interplay of malignant glioma cells, macrophages, glioma specific CD8+T cells and the immunotherapeutic drug Adoptive Cellular Immunotherapy (ACI). To better understand under what circumstances the glioma cells can be eliminated, we employ the theory of optimal control. We investigate the dynamics of the system by observing biologically feasible equilibrium points and their stability analysis before administration of the external therapy ACI. We solve an optimal control problem with an objective functional which minimizes the glioma cell burden as well as the side effects of the treatment. We characterize our optimal control in terms of the solutions to the optimality system, in which the state system coupled with the adjoint system. Our model simulation demonstrates that the strength of treatment u1(t) plays an important role to eliminate the glioma cells. Finally, we derive an optimal treatment strategy and then solve it numerically.Keywords: malignant gliomas; stability analysis; optimal control; adoptive cellular immunotherapy
Modeling the dynamics of hepatitis C virus with combined antiviral drug therapy: interferon and ribavirin.Banerjee S1, Keval R, Gakkhar S.Author information1 Department of Mathematics, Indian Institute of Technology Roorkee (IITR), Roorkee 247667, Uttaranchal, India. Electronic address: sandofma@iitr.ernet.in.AbstractA mathematical modeling of hepatitis C virus (HCV) dynamics and antiviral therapy has been presented in this paper. The proposed model, which involves four coupled ordinary differential equations, describes the interaction of target cells (hepatocytes), infected cells, infectious virions and non-infectious virions. The model takes into consideration the addition of ribavirin to interferon therapy and explains the dynamics regarding a biphasic and triphasic decline of viral load in the model. A critical drug efficacy parameter has been defined and it is shown that for an efficacy above this critical value, HCV is eradicated whereas for efficacy lower this critical value, a new steady state for infectious virions is reached, which is lower than the previous steady state value.Copyright \u00a9 2013 Elsevier Inc. All rights reserved.KEYWORDS:Hepatitis C virus (HCV); Infected cells; Infectious virions; Interferon; Noninfectious virions; Ribavirin; Target cells
This is a mathematical model for NF-\u03baB oscillations, described by a set of ordinary nonlinear differential equations, when perturbed by a circadian oscillation.
Noise-assisted interactions of tumor and immune cells.Bose T1, Trimper S.Author information1 Institute of Physics, Martin-Luther-University, D-06099 Halle, Germany. thomas.bose@physik.uni-halle.deAbstractWe consider a three-state model comprising tumor cells, effector cells, and tumor-detecting cells under the influence of noises. It is demonstrated that inevitable stochastic forces existing in all three cell species are able to suppress tumor cell growth completely. Whereas the deterministic model does not reveal a stable tumor-free state, the auto-correlated noise combined with cross-correlation functions can either lead to tumor-dormant states, tumor progression, as well as to an elimination of tumor cells. The auto-correlation function exhibits a finite correlation time \u03c4, while the cross-correlation functions shows a white-noise behavior. The evolution of each of the three kinds of cells leads to a multiplicative noise coupling. The model is investigated by means of a multivariate Fokker-Planck equation for small \u03c4. The different behavior of the system is, above all, determined by the variation of the correlation time and the strength of the cross-correlation between tumor and tumor-detecting cells. The theoretical model is based on a biological background discussed in detail, and the results are tested using realistic parameters from experimental observations.
This is a dynamic mathematical model describing the development of the cellular branch of the intestinal immune system of poultry during the first 42 days of life, and of its response towards an oral infection with Salmonella enterica serovar Enteritidis.
This is a mathematical model of heat shock protein synthesis induced by an external temperature stimulus. The model consists of a system of nine nonlinear ordinary differential equations describing the temporal evolution of key variables involved in the regulation of HSP synthesis.
The combined effects of optimal control in cancer remissionSubhasKhajanchiDibakarGhoshAbstractWe investigate a mathematical model depicting the nonlinear dynamics of immunogenic tumors as envisioned by Kuznetsov et al. [1]. To understand the dynamics under what circumstances the cancer cells can be eliminated, we implement the theory of optimal control. We design two types of external treatment strategies, one is Adoptive Cellular Immunotherapy and another is interleukin-2. Our aim is to establish the treatment regimens that maximize the effector cell count and minimize the tumor cell burden and the deleterious effects of the total amount of drugs. We derive the existence of an optimal control by using the boundedness of solutions. We characterize the optimality system, in which the state system is coupled with co-states. The uniqueness of an optimal control of our problem is also analyzed. Finally, we demonstrate the numerical illustrations that the optimal regimens reduce the tumor burden under different scenarios.
This is a mathematical model describing the hematopoietic lineages with leukemia lineages, as controlled by end-product negative feedback inhibition. Variables include hematopoietic stem cells, progenitor cells, terminally differentiated HSCs, leukemia stem cells, and terminally differentiated leukemia stem cells.
This is a ordinary differential equation mathematical model describing the Rho GTPase cycle in which Rho GDP-dissociation inhibitors (RhoGDIs) inhibit the regulatory activities of guanine nucleotide exchange factors (GEFs) and GTPase-activating proteins (GAPs) by interacting with them directly as well as by sequestering the Rho GTPases. The model was constructed with the intent of analyzing the role of RhoGDIs in Rho GTPase signaling.
Persistence analysis in a Kolmogorov-type model for cancer-immune system competitionAIP Conference Proceedings 1558, 1797 (2013); https://doi.org/10.1063/1.4825874C. BiancaDipartimento di Scienze Matematiche, Politecnico di Torino, Torino, ItalyF. PappalardoDipartimento di Scienza del Farmaco, Universit\u00e0 degli Studi di Catania, Catania, ItalyM. Pennisi and M. A. RagusaDipartimento di Matematica e Informatica, Universit\u00e0 degli Studi di Catania, Catania, Italy
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A mathematical model describing oncolytic virotherapy with incorporation the viral lytic cycle and the virus-specific CTL response. The thresholds for viral treatment and virus-specific CTl response are also obtained.
A fractional mathematical model of breast cancer competition modelAuthor links open overlay panelJ.E.Sol\u00eds-P\u00e9rezaJ.F.G\u00f3mez-AguilarbA.Atanganaca Tecnol\u00f3gico Nacional de M\u00e9xico/CENIDET. Interior Internado Palmira S/N, Col. Palmira, C.P. 62490, Cuernavaca, Morelos, M\u00e9xicob CONACyT-Tecnol\u00f3gico Nacional de M\u00e9xico/CENIDET. Interior Internado Palmira S/N, Col. Palmira, C.P. 62490, Cuernavaca, Morelos, M\u00e9xicoc Institute for Groundwater Studies, Faculty of Natural and Agricultural Sciences, University of the Free State, Bloemfontein 9300, South AfricaAbstractIn this paper, a mathematical model which considers population dynamics among cancer stem cells, tumor cells, healthy cells, the effects of excess estrogen and the body\u2019s natural immune response on the cell populations was considered. Fractional derivatives with power law and exponential decay law in Liouville\u2013Caputo sense were considered. Special solutions using an iterative scheme via Laplace transform were obtained. Furthermore, numerical simulations of the model considering both derivatives were obtained using the Atangana\u2013Toufik numerical method. Also, random model described by a system of random differential equations was presented. The use of fractional derivatives provides more useful information about the complexity of the dynamics of the breast cancer competition model.
Modelling tumor growth with immune response and drug using ordinary differential equationsMohd Rashid Admon, Normah MaanThis is a mathematical study about tumor growth from a different perspective, with the aim of predicting and/or controlling the disease. The focus is on the effect and interaction of tumor cell with immune and drug. This paper presents a mathematical model of immune response and a cycle phase specific drug using a system of ordinary differential equations. Stability analysis is used to produce stability regions for various values of certain parameters during mitosis. The stability region of the graph shows that the curve splits the tumor decay and growth regions in the absence of immune response. However, when immune response is present, the tumor growth region is decreased. When drugs are considered in the system, the stability region remains unchanged as the system with the presence of immune response but the population of tumor cells at interphase and metaphase is reduced with percentage differences of 1.27 and 1.53 respectively. The combination of immunity and drug to fight cancer provides a better method to reduce tumor population compared to immunity alone.
In this paper, a nonlinear mathematical model is proposed and analyzed to study theeffect of environmental toxicant on the immune response of the body. Criteria for localstability, instability and global stability are obtained. It is shown that the immuneresponse of the body decreases as the concentration of environmental toxicant increases,and certain criteria are obtained under which it settles down at its equilibrium level.In the absence of toxicant, an oscillatory behavior of immune system and pathogenicgrowth is observed. However, in the presence of toxicant, oscillatory behavior is notobserved. These studies show that the toxicant may have a grave effect on our body\u2019sdefense mechanism.Keywords: Pathogen; Immune Response; Toxicant; Stability.
In this paper, a nonlinear mathematical model is proposed and analyzed to study theeffect of environmental toxicant on the immune response of the body. Criteria for localstability, instability and global stability are obtained. It is shown that the immuneresponse of the body decreases as the concentration of environmental toxicant increases,and certain criteria are obtained under which it settles down at its equilibrium level.In the absence of toxicant, an oscillatory behavior of immune system and pathogenicgrowth is observed. However, in the presence of toxicant, oscillatory behavior is notobserved. These studies show that the toxicant may have a grave effect on our body\u2019sdefense mechanism.Keywords: Pathogen; Immune Response; Toxicant; Stability.
All cells and organisms exhibit stress-coping mechanisms toensure survival. Cytoplasmic protein-RNA assemblies termedstress granules are increasingly recognized to promote cellularsurvival under stress. Thus, they might represent tumor vul-nerabilities that are currently poorly explored. The translation-inhibitory eIF2\u03b1kinases are established as main drivers ofstress granule assembly. Using a systems approach, we identifythe translation enhancers PI3K and MAPK/p38 as pro-stress-granule-kinases. They act through the metabolic master regu-lator mammalian target of rapamycin complex 1 (mTORC1) topromote stress granule assembly. When highly active, PI3K is themain driver of stress granules; however, the impact of p38becomes apparent as PI3K activity declines. PI3K and p38 thusact in a hierarchical manner to drive mTORC1 activity and stressgranule assembly. Of note, this signaling hierarchy is also presentin human breast cancer tissue. Importantly, only the recognition ofthe PI3K-p38 hierarchy under stress enabled the discovery of p38\u2019srole in stress granule formation. In summary, we assign a new pro-survival function to the key oncogenic kinases PI3K and p38, as theyhierarchically promote stress granule formation
Mathematical modeling of regulatory T cell effects on renal cell carcinoma treatmentLisette dePillis 1, , Trevor Caldwell 2, , Elizabeth Sarapata 2, and Heather Williams 2,1. \tDepartment of Mathematics, Harvey Mudd College, Claremont, CA 917112. \tHarvey Mudd College, Claremont, CA 91711, United States, United States, United States AbstractWe present a mathematical model to study the effects of the regulatory T cells (Treg) on Renal Cell Carcinoma (RCC) treatment with sunitinib. The drug sunitinib inhibits the natural self-regulation of the immune system, allowing the effector components of the immune system to function for longer periods of time. This mathematical model builds upon our non-linear ODE model by de Pillis et al. (2009) [13] to incorporate sunitinib treatment, regulatory T cell dynamics, and RCC-specific parameters. The model also elucidates the roles of certain RCC-specific parameters in determining key differences between in silico patients whose immune profiles allowed them to respond well to sunitinib treatment, and those whose profiles did not. Simulations from our model are able to produce results that reflect clinical outcomes to sunitinib treatment such as: (1) sunitinib treatments following standard protocols led to improved tumor control (over no treatment) in about 40% of patients; (2) sunitinib treatments at double the standard dose led to a greater response rate in about 15% the patient population; (3) simulations of patient response indicated improved responses to sunitinib treatment when the patient's immune strength scaling and the immune system strength coefficients parameters were low, allowing for a slightly stronger natural immune response.Keywords: Renal cell carcinoma, mathematical modeling., sunitinib, immune system, regulatory T cells.
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- "summary": "<notes xmlns="http://www.sbml.org/sbml/level2/version4"> <body xmlns="http://www.w3.org/1999/xhtml"> <pre>The dynamics of an optimally controlled tumor model: A case studyL.GDe PillisabARadunskayaahttps://doi.org/10.1016/S0895-7177(03)00133-XAbstractWe present a phase-space analysis of a mathematical model of tumor growth with an immune response and chemotherapy. We prove that all orbits are bounded and must converge to one of several possible equilibrium points. Therefore, the long-term behavior of an orbit is classified according to the basin of attraction in which it starts. The addition of a drug term to the system can move the solution trajectory into a desirable basin of attraction. We show that the solutions of the model with a time-varying drug term approach the solutions of the system without the drug once traatment has stopped. We present numerical experiments in which optimal control therapy is able to drive the system into a desirable basin of attraction, whereas traditional pulsed chemotherapy is not.</pre> </body> </notes>",
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Modelling of anti-tumour immune response: Immunocorrective effectof weak centimetre electromagnetic wavesO.G. Isaeva* and V.A. OsipovBogoliubov Laboratory of Theoretical Physics, Joint Institute for Nuclear Research, Dubna,Moscow Region, RussiaWe formulate the dynamical model for the anti-tumour immune response based onintercellular cytokine-mediated interactions with the interleukin-2 (IL-2) taken intoaccount. The analysis shows that the expression level of tumour antigens on antigenpresenting cells has a distinct influence on the tumour dynamics. At low antigenpresentation, a progressive tumour growth takes place to the highest possible value.At high antigen presentation, there is a decrease in tumour size to some value when thedynamical equilibrium between the tumour and the immune system is reached. In thecase of the medium antigen presentation, both these regimes can be realized dependingon the initial tumour size and the condition of the immune system. A pronouncedimmunomodulating effect (the suppression of tumour growth and the normalization ofIL-2 concentration) is established by considering the influence of low-intensityelectromagnetic microwaves as a parametric perturbation of the dynamical system. Thisfinding is in qualitative agreement with the recent experimental results onimmunocorrective effects of centimetre electromagnetic waves in tumour-bearing mice.Keywords: carcinogenesis; interleukin-2; modelling; anti-tumour immunity;electromagnetic waves
An insight into tumor dormancy equilibrium via the analysis of its domain ofattractionA. Merola, C. Cosentino *, F. AmatoSchool of Computer and Biomedical Engineering, Universita` degli Studi Magna Gr\u00e6cia di Catanzaro, Campus \u2018\u2018Salvatore Venuta\u2019\u2019, 88100 Catanzaro, ItalyA B S T R A C TThe trajectories of the dynamic system which regulates the competition between the populations ofmalignant cells and immune cells may tend to an asymptotically stable equilibrium in which the sizes ofthese populations do not vary, which is called tumor dormancy. Especially for lower steady-state sizes ofthe population of malignant cells, this equilibrium represents a desirable clinical condition since thetumor growth is blocked. In this context, it is of mandatory importance to analyze the robustness of thisclinical favorable state of health in the face of perturbations. To this end, the paper presents anoptimization technique to determine whether an assigned rectangular region, which surrounds anasymptotically stable equilibrium point of a quadratic systems, is included into the domain of attractionof the equilibrium itself. The biological relevance of the application of this technique to the analysis oftumor growth dynamics is shown on the basis of a recent quadraticmodel of the tumor\u2013immune systemcompetition dynamics. Indeed the application of the proposedmethodology allows to ensure that a givensafety region, determined on the basis of clinical considerations, belongs to the domain of attraction ofthe tumor blocked equilibrium; therefore for the set of perturbed initial conditions which belong to suchregion, the convergence to the healthy steady state is guaranteed. The proposed methodology can alsoprovide an optimal strategy for cancer treatment.
Tumour suppression by immune system through stochastic oscillationsGiulioCaravagnaa Albertod\u2019Onofriob PaoloMilazzoaRobertoBarbutiahttps://doi.org/10.1016/j.jtbi.2010.05.013AbstractThe well-known Kirschner\u2013Panetta model for tumour\u2013immune System interplay [Kirschner, D., Panetta, J.C., 1998. Modelling immunotherapy of the tumour\u2013immune interaction. J. Math. Biol. 37 (3), 235\u2013252] reproduces a number of features of this essential interaction, but it excludes the possibility of tumour suppression by the immune system in the absence of therapy. Here we present a hybrid\u2013stochastic version of that model. In this new framework, we show that in reality the model is also able to reproduce the suppression, through stochastic extinction after the first spike of an oscillation.
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- "repository_type": "biomodels",
- "summary": "<notes xmlns="http://www.sbml.org/sbml/level2/version4"> <body xmlns="http://www.w3.org/1999/xhtml"> <pre>Optimal control of mixed immunotherapy and chemotherapy of tumorsLisette Depillis, K. R. Fister , W. Gu, Tiffany Head, Kenny Maples, Todd Neal, Anand Murugan and Kenji KozaiAbstractWe investigate a mathematical population model of tumor-immune interactions. Thepopulations involved are tumor cells, specific and non-specific immune cells, and con-centrations of therapeutic treatments. We establish the existence of an optimal con-trol for this model and provide necessary conditions for the optimal control triple forsimultaneous application of chemotherapy, tumor infiltrating lymphocyte (TIL) ther-apy, and interleukin-2 (IL-2) treatment. We discuss numerical results for the combina-tion of the chemo-immunotherapy regimens. We find that the qualitative nature of ourresults indicates that chemotherapy is the dominant intervention with TIL interactingin a complementary fashion with the chemotherapy. However, within the optimal con-trol context, the interleukin-2 treatment does not become activated for the estimatedparameter ranges.",
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- "timestamp_created": "2025-01-30 14:05:12.511009+00:00",
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- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000000913",
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- "name": "Parra_Guillen2013 - Mathematical model approach to describe tumour response in mice after vaccine administration_model1",
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Mathematical model approach to describe tumour response in mice after vaccine administration and its applicability to immune-stimulatory cytokine-based strategies.Parra-Guillen ZP1, Berraondo P, Grenier E, Ribba B, Troconiz IF.Author informationAbstractImmunotherapy is a growing therapeutic strategy in oncology based on the stimulation of innate and adaptive immune systems to induce the death of tumour cells. In this paper, we have developed a population semi-mechanistic model able to characterize the mechanisms implied in tumour growth dynamic after the administration of CyaA-E7, a vaccine able to target antigen to dendritic cells, thus triggering a potent immune response. The mathematical model developed presented the following main components: (1) tumour progression in the animals without treatment was described with a linear model, (2) vaccine effects were modelled assuming that vaccine triggers a non-instantaneous immune response inducing cell death. Delayed response was described with a series of two transit compartments, (3) a resistance effect decreasing vaccine efficiency was also incorporated through a regulator compartment dependent upon tumour size, and (4) a mixture model at the level of the elimination of the induced signal vaccine (k 2) to model tumour relapse after treatment, observed in a small percentage of animals (15.6%). The proposed model structure was successfully applied to describe antitumor effect of IL-12, suggesting its applicability to different immune-stimulatory therapies. In addition, a simulation exercise to evaluate in silico the impact on tumour size of possible combination therapies has been shown. This type of mathematical approaches may be helpful to maximize the information obtained from experiments in mice, reducing the number of animals and the cost of developing new antitumor immunotherapies.
",
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- "tag": "Mus musculus"
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- "timestamp_created": "2025-01-30 14:05:13.050588+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000000914",
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- "id": 3200,
- "name": "Sun2018 - Instantaneous mutation rate in cancer initiation and progression",
- "repository_type": "biomodels",
- "summary": "<notes xmlns="http://www.sbml.org/sbml/level2/version4"> <body xmlns="http://www.w3.org/1999/xhtml"> <p>BackgroundCancer is one of the leading causes for the morbidity and mortality worldwide. Although substantial studies have been conducted theoretically and experimentally in recent years, it is still a challenge to explore the mechanisms of cancer initiation and progression. The investigation for these problems is very important for the diagnosis of cancer diseases and development of treatment schemes.ResultsTo accurately describe the process of cancer initiation, we propose a new concept of gene initial mutation rate based on our recently designed mathematical model using the non-constant mutation rate. Unlike the widely-used average gene mutation rate that depends on the number of mutations, the gene initial mutation rate can be used to describe the initiation process of a single patient. In addition, we propose the instantaneous tumour doubling time that is a continuous function of time based on the non-constant mutation rate. Our proposed concepts are supported by the clinic data of seven patients with advanced pancreatic cancer. The regression results suggest that, compared with the average mutation rate, the estimated initial mutation rate has a larger value of correlation coefficient with the patient survival time. We also provide the estimated tumour size of these seven patients over time.ConclusionsThe proposed concepts can be used to describe the cancer initiation and progression for different patients more accurately. Since a quantitative understanding of cancer progression is important for clinical treatment, our proposed model and calculated results may provide insights into the development of treatment schemes and also have other clinic implications.</p> </body> </notes>",
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- "timestamp_created": "2025-01-30 14:05:13.579919+00:00",
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- "name": "Kraan199_Kinetics of Cortisol Metabolism and Excretion.",
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A new model is proposed to study the kinetics of [3H]cortisol metabolism by using urinary data only. The model consists of 5 pools, in which changes of the fractions of dose are given by a system of 5 ordinary differential equations. After i.v. administration of [3H]cortisol to 8 multiple pituitary deficient (MPD) patients (group I) the urines from each patient were collected in 9-15 portions during the following 3 days. From the urinary data the rate constants of cortisol metabolism were calculated. A published set of urinary data from patients with a normal cortisol metabolism (group II) was used for comparison. The overall half-life of the label in the circulation was 30 min for both groups; the half-life of the label excretion by both groups was 6 h and the time of maximal activity in the main metabolizing pool was 1.8 h in group I and 1.5 h in group II. The 20% of normal cortisol production rate (CPR) in the 8 MPD patients amounted to 7.2 + 1.9/zmol/(m2*d). Therefore, the low CPR but normal rate constants, i.e. a normal metabolic clearance rate of cortisol, in the MPD patients suggest a sensitive adjustment of the cortisol response in the target organs.
This a model from the article: A quantitative model of sleep-wake dynamics based on the physiology of thebrainstem ascending arousal system. Phillips AJ, Robinson PA. J Biol Rhythms 2007 Apr;22(2):167-79 17440218 , Abstract: A quantitative, physiology-based model of the ascending arousal system isdeveloped, using continuum neuronal population modeling, which involvesaveraging properties such as firing rates across neurons in each population. Themodel includes the ventrolateral preoptic area (VLPO), where circadian andhomeostatic drives enter the system, the monoaminergic and cholinergic nuclei ofthe ascending arousal system, and their interconnections. The human sleep-wakecycle is governed by the activities of these nuclei, which modulate thebehavioral state of the brain via diffuse neuromodulatory projections. The modelparameters are not free since they correspond to physiological observables.Approximate parameter bounds are obtained by requiring consistency withphysiological and behavioral measures, and the model replicates the humansleep-wake cycle, with physiologically reasonable voltages and firing rates.Mutual inhibition between the wake-promoting monoaminergic group andsleep-promoting VLPO causes ;;flip-flop'' behavior, with most time spent in 2stable steady states corresponding to wake and sleep, with transitions betweenthem on a timescale of a few minutes. The model predicts hysteresis in thesleep-wake cycle, with a region of bistability of the wake and sleep states.Reducing the monoaminergic-VLPO mutual inhibition results in a smallerhysteresis loop. This makes the model more prone to wake-sleep transitions inboth directions and makes the states less distinguishable, as in narcolepsy. Themodel behavior is robust across the constrained parameter ranges, but withsufficient flexibility to describe a wide range of observed phenomena.
This model was taken from the CellML repository and automatically converted to SBML. The original model was: Phillips AJ, Robinson PA. (2007) - version=1.0 The original CellML model was created by: Catherine Lloyd c.lloyd@auckland.ac.nz The University of Auckland
This model originates from BioModels Database: A Database of Annotated Published Models (http://www.ebi.ac.uk/biomodels/). It is copyright (c) 2005-2011 The BioModels.net Team. To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
In summary, you are entitled to use this encoded model in absolutely any manner you deem suitable, verbatim, or with modification, alone or embedded it in a larger context, redistribute it, commercially or not, in a restricted way or not..
At the restriction point (R), mammalian cells irreversibly commit to divide. R has been viewed as a point in G1 that is passed when growth factor signaling initiates a positive feedback loop of Cdk activity. However, recent studies have cast doubt on this model by claiming R occurs prior to positive feedback activation in G1 or even before completion of the previous cell cycle. Here we reconcile these results and show that whereas many commonly used cell lines do not exhibit a G1 R, primary fibroblasts have a G1 R that is defined by a precise Cdk activity threshold and the activation of cell-cycle-dependent transcription. A simple threshold model, based solely on Cdk activity, predicted with more than 95% accuracy whether individual cells had passed R. That a single measurement accurately predicted cell fate shows that the state of complex regulatory networks can be assessed using a few critical protein activities.
On optimal chemotherapy with a strongly targeted agent for a model of tumor-immune system interactions with generalized logistic growth.Ledzewicz U1, Olumoye O, Sch\u00e4ttler H.1Dept. of Mathematics and Statistics, Southern Illinois University Edwardsville, Edwardsville, Illinois 62026-1653, USA. uledzew@siue.eduAbstractIn this paper, a mathematical model for chemotherapy that takes tumor immune-system interactions into account is considered for a strongly targeted agent. We use a classical model originally formulated by Stepanova, but replace exponential tumor growth with a generalised logistic growth model function depending on a parameter v. This growth function interpolates between a Gompertzian model (in the limit v \u2192 0) and an exponential model (in the limit v \u2192 \u221e). The dynamics is multi-stable and equilibria and their stability will be investigated depending on the parameter v. Except for small values of v, the system has both an asymptotically stable microscopic (benign) equilibrium point and an asymptotically stable macroscopic (malignant) equilibrium point. The corresponding regions of attraction are separated by the stable manifold of a saddle. The optimal control problem of moving an initial condition that lies in the malignant region into the benign region is formulated and the structure of optimal singular controls is determined
",
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- "timestamp_created": "2025-01-30 14:05:15.813200+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000000919",
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- "id": 3205,
- "name": "Jarrett2015 - Modelling the interaction between immune response, bacterial dynamics and inflammatory damage",
- "repository_type": "biomodels",
- "summary": "Mathematical model of pro- and anti-inflammatory response, inflammation/damage and infection dynamics in BALB/c mouse with Staphylococcal aureus infection.",
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- "tag": "BioModels:BIOMD0000000920"
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- "id": 3925,
- "tag": "Regulation of inflammatory response"
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- "timestamp_created": "2025-01-30 14:05:16.341351+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000000920",
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- "id": 3206,
- "name": "Khajanchi2017 - Uniform Persistence and Global Stability for a Brain Tumor and Immune System Interaction",
- "repository_type": "biomodels",
- "summary": "This paper describes the synergistic interaction between the growth of malignant gliomas and the immune system interactions using a system of coupled ordinary di\u00aeerential equations (ODEs). The proposed mathematical model comprises the interaction of glioma cells, macrophages, activated Cytotoxic T-Lymphocytes (CTLs), the immunosuppressive factor TGF- and the immuno-stimulatory factor IFN-. The dynamical behavior of the proposed system both analytically and numerically is investigated from the point of view of stability. By constructing Lyapunov functions, the global behavior of the glioma-free and the interior equilibrium point have been analyzed under some assumptions. Finally, we perform numerical simulations in order to illustrate our analytical \u00afndings by varying the system parameters.",
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- "id": 4411,
- "tag": "BioModels:BIOMD0000000921"
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- "id": 3002,
- "tag": "Homo sapiens"
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- "id": 704,
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- }
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- "timestamp_created": "2025-01-30 14:05:16.866742+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000000921",
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- "id": 3207,
- "name": "Turner2015-Human/Mosquito ELP Model",
- "repository_type": "biomodels",
- "summary": "
the growth of the mosquito population is directly related to the spread of malaria, the Four Stage Life Cycle is incorporated to model the effects of climate change and interspecies competition within the mosquito life cycle stages of Egg, Larvae, and Pupae.
BackgroundThis work focuses on the computational modelling of osteomyelitis, a bone pathology caused by bacteria infection (mostly Staphylococcus aureus). The infection alters the RANK/RANKL/OPG signalling dynamics that regulates osteoblasts and osteoclasts behaviour in bone remodelling, i.e. the resorption and mineralization activity. The infection rapidly leads to severe bone loss, necrosis of the affected portion, and it may even spread to other parts of the body. On the other hand, osteoporosis is not a bacterial infection but similarly is a defective bone pathology arising due to imbalances in the RANK/RANKL/OPG molecular pathway, and due to the progressive weakening of bone structure.ResultsSince both osteoporosis and osteomyelitis cause loss of bone mass, we focused on comparing the dynamics of these diseases by means of computational models. Firstly, we performed meta-analysis on a gene expression data of normal, osteoporotic and osteomyelitis bone conditions. We mainly focused on RANKL/OPG signalling, the TNF and TNF receptor superfamilies and the NF-kB pathway. Using information from the gene expression data we estimated parameters for a novel model of osteoporosis and of osteomyelitis. Our models could be seen as a hybrid ODE and probabilistic verification modelling framework which aims at investigating the dynamics of the effects of the infection in bone remodelling. Finally we discuss different diagnostic estimators defined by formal verification techniques, in order to assess different bone pathologies (osteopenia, osteoporosis and osteomyelitis) in an effective way.ConclusionsWe present a modeling framework able to reproduce aspects of the different bone remodeling defective dynamics of osteomyelitis and osteoporosis. We report that the verification-based estimators are meaningful in the light of a feed forward between computational medicine and clinical bioinformaticsModel is encoded by Ruby and submitted and curated to BioModels by Ahmad Zyoud
Pneumococcal pneumonia is a leading cause of death and a major source of human morbidity. The initial immune response plays a central role in determining the course and outcome of pneumococcal disease. We combine bacterial titer measurements from mice infected with Streptococcus pneumoniae with mathematical modeling to investigate the coordination of immune responses and the effects of initial inoculum on outcome. To evaluate the contributions of individual components, we systematically build a mathematical model from three subsystems that describe the succession of defensive cells in the lung: resident alveolar macrophages, neutrophils and monocyte-derived macrophages. The alveolar macrophage response, which can be modeled by a single differential equation, can by itself rapidly clear small initial numbers of pneumococci. Extending the model to include the neutrophil response required additional equations for recruitment cytokines and host cell status and damage. With these dynamics, two outcomes can be predicted: bacterial clearance or sustained bacterial growth. Finally, a model including monocyte-derived macrophage recruitment by neutrophils suggests that sustained bacterial growth is possible even in their presence. Our model quantifies the contributions of cytotoxicity and immune-mediated damage in pneumococcal pathogenesis.
We undertake a mathematical investigation of a model for the generation of thrombin, an enzyme central to haemostatic blood coagulation, as well as to thrombotic disorders, that is the end product of a complicated protein cascade with multiple feedbacks that ensures its production in the right place at the right time. In a laboratory setting, its central role is reflected in thrombin evolution over time being used as a measure of the ability of a patient's blood to clot. Here, we present a model for the generation of thrombin (based on earlier work) and analyse it using the method of matched asymptotic expansions to derive a sequence of simplified models that characterize the roles of distinct interactions over various timescales. In particular, we are able through the asymptotic analysis to provide simplified models that are an excellent substitute for the full model (capturing the explosive growth and decay of thrombin) and approximations for the key experimental measurements used to describe thrombin's characteristic evolution over time. The asymptotic results are validated against numerical simulations.
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- "timestamp_created": "2025-01-30 14:05:18.945856+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000000925",
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- "id": 3211,
- "name": "Rhodes2019 - Immune-Mediated theory of Metastasis",
- "repository_type": "biomodels",
- "summary": "<notes xmlns="http://www.sbml.org/sbml/level2/version4"> <body xmlns="http://www.w3.org/1999/xhtml"> <p>Abstract:Accumulating experimental and clinical evidence suggest that the immune response to cancer is not exclusively anti-tumor. Indeed, the pro-tumor roles of the immune system - as suppliers of growth and pro-angiogenic factors or defenses against cytotoxic immune attacks, for example - have been long appreciated, but relatively few theoretical works have considered their effects. Inspired by the recently proposed "immune-mediated" theory of metastasis, we develop a mathematical model for tumor-immune interactions at two anatomically distant sites, which includes both anti- and pro-tumor immune effects, and the experimentally observed tumor-induced phenotypic plasticity of immune cells (tumor "education" of the immune cells). Upon confrontation of our model to experimental data, we use it to evaluate the implications of the immune-mediated theory of metastasis. We find that tumor education of immune cells may explain the relatively poor performance of immunotherapies, and that many metastatic phenomena, including metastatic blow-up, dormancy, and metastasis to sites of injury, can be explained by the immune-mediated theory of metastasis. Our results suggest that further work is warranted to fully elucidate the pro-tumor effects of the immune system in metastatic cancer.</p> </body> </notes>",
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- "timestamp_created": "2025-01-30 14:05:19.456666+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000000926",
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- "name": "Grigolon2018-Responses to auxin signals",
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Plants depend on the signalling of the phytohormone auxin for their development and for responding to environmental perturbations. The associated biomolecular signalling network involves a negative feedback on Aux/IAA proteins which mediate the influence of auxin (the signal) on the auxin response factor (ARF) transcription factors (the drivers of the response). To probe the role of this feedback, we consider alternative in silico signalling networks implementing different operating principles. By a comparative analysis, we find that the presence of a negative feedback allows the system to have a far larger sensitivity in its dynamical response to auxin and that this sensitivity does not prevent the system from being highly resilient. Given this insight, we build a new biomolecular signalling model for quantitatively describing such Aux/IAA and ARF responses.
Osteoarthritis (OA) is a degenerative disease which causes pain and stiffness in joints. OA progresses through excessive degradation of joint cartilage, eventually leading to significant joint degeneration and loss of function. Cytokines, a group of cell signalling proteins, present in raised concentrations in OA joints, can be classified into pro-inflammatory and anti-inflammatory groups. They mediate cartilage degradation through several mechanisms, primarily the up-regulation of matrix metalloproteinases (MMPs), a group of collagen-degrading enzymes. In this paper we show that the interactions of cytokines within cartilage have a crucial role to play in OA progression and treatment. We develop a four-variable ordinary differential equation model for the interactions between pro- and anti-inflammatory cytokines, MMPs and fibronectin fragments (Fn-fs), a by-product of cartilage degradation and up-regulator of cytokines. We show that the model has four classes of dynamic behaviour: homoeostasis, bistable inflammation, tristable inflammation and persistent inflammation. We show that positive and negative feedbacks controlling cytokine production rates can determine either a pre-disposition to OA or initiation of OA. Further, we show that manipulation of cytokine, MMP and Fn-fs levels can be used to treat OA, but we suggest that multiple treatment targets may be essential to halt or slow disease progression.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
immunotherapy offers a better prognosis for pancreatic cancer patients. As a direct extension of this work, various new therapy methods that are under exploration and clinical trials could be assessed or evaluated using the newly developed mathematical prognosis model.
Its a mathematical model reflecting chemotherapy response in tumor immune interaction system. Model encoded by Sarubini Kananathan and annotated+submitted to Biomodels by Krishna Tiwari
Fertility critically depends on the gonadotropin-releasing hormone (GnRH) pulse generator, a neural construct comprised of hypothalamic neurons coexpressing kisspeptin, neurokoinin-B and dynorphin. Here, using mathematical modeling and in vivo optogenetics we reveal for the first time how this neural construct initiates and sustains the appropriate ultradian frequency essential for reproduction. Prompted by mathematical modeling, we show experimentally using female estrous mice that robust pulsatile release of luteinizing hormone, a proxy for GnRH, emerges abruptly as we increase the basal activity of the neuronal network using continuous low-frequency optogenetic stimulation. Further increase in basal activity markedly increases pulse frequency and eventually leads to pulse termination. Additional model predictions that pulsatile dynamics emerge from nonlinear positive and negative feedback interactions mediated through neurokinin-B and dynorphin signaling respectively are confirmed neuropharmacologically. Our results shed light on the long-elusive GnRH pulse generator offering new horizons for reproductive health and wellbeing.SIGNIFICANCE STATEMENT The gonadotropin-releasing hormone (GnRH) pulse generator controls the pulsatile secretion of the gonadotropic hormones LH and FSH and is critical for fertility. The hypothalamic arcuate kisspeptin neurons are thought to represent the GnRH pulse generator, since their oscillatory activity is coincident with LH pulses in the blood; a proxy for GnRH pulses. However, the mechanisms underlying GnRH pulse generation remain elusive. We developed a mathematical model of the kisspeptin neuronal network and confirmed its predictions experimentally, showing how LH secretion is frequency-modulated as we increase the basal activity of the arcuate kisspeptin neurons in vivo using continuous optogenetic stimulation. Our model provides a quantitative framework for understanding the reproductive neuroendocrine system and opens new horizons for fertility regulationModel is encoded by Johannes and submitted to BioModels by Ahmad Zyoud.
Biofilms offer an excellent example of ecological interaction among bacteria. Temporal and spatial oscillations in biofilms are an emerging topic. In this paper, we describe the metabolic oscillations in Bacillus subtilis biofilms by applying the smallest theoretical chemical reaction system showing Hopf bifurcation proposed by Wilhelm and Heinrich in 1995. The system involves three differential equations and a single bilinear term. We specifically select parameters that are suitable for the biological scenario of biofilm oscillations. We perform computer simulations and a detailed analysis of the system including bifurcation analysis and quasi-steady-state approximation. We also discuss the feedback structure of the system and the correspondence of the simulations to biological observations. Our theoretical work suggests potential scenarios about the oscillatory behaviour of biofilms and also serves as an application of a previously described chemical oscillator to a biological system.
A minimal model describing the embryonic cell division cycle at the molecular level in eukaryotes is analyzed mathematically. It is known from numerical simulations that the corresponding three-dimensional system of ODEs has periodic solutions in certain parameter regimes. We prove the existence of a stable limit cycle and provide a detailed description on how the limit cycle is generated. The limit cycle corresponds to a relaxation oscillation of an auxiliary system, which is singularly perturbed and has the same orbits as the original model. The singular perturbation character of the auxiliary problem is caused by the occurrence of small Michaelis constants in the model. Essential pieces of the limit cycle of the auxiliary problem consist of segments of slow motion close to several branches of a two dimensional critical manifold which are connected by fast jumps. In addition, a new phenomenon of exchange of stability occurs at lines, where the branches of the two-dimensional critical manifold intersect. This novel type of relaxation oscillations is studied by combining standard results from geometric singular perturbation with several suitable blow-up transformations.
Computational modeling and the theory of nonlinear dynamical systems allow one to not simply describe the events of the cell cycle, but also to understand why these events occur, just as the theory of gravitation allows one to understand why cannonballs fly in parabolic arcs. The simplest examples of the eukaryotic cell cycle operate like autonomous oscillators. Here, we present the basic theory of oscillatory biochemical circuits in the context of the Xenopus embryonic cell cycle. We examine Boolean models, delay differential equation models, and especially ordinary differential equation (ODE) models. For ODE models, we explore what it takes to get oscillations out of two simple types of circuits (negative feedback loops and coupled positive and negative feedback loops). Finally, we review the procedures of linear stability analysis, which allow one to determine whether a given ODE model and a particular set of kinetic parameters will produce oscillations.
Computational modeling and the theory of nonlinear dynamical systems allow one to not simply describe the events of the cell cycle, but also to understand why these events occur, just as the theory of gravitation allows one to understand why cannonballs fly in parabolic arcs. The simplest examples of the eukaryotic cell cycle operate like autonomous oscillators. Here, we present the basic theory of oscillatory biochemical circuits in the context of the Xenopus embryonic cell cycle. We examine Boolean models, delay differential equation models, and especially ordinary differential equation (ODE) models. For ODE models, we explore what it takes to get oscillations out of two simple types of circuits (negative feedback loops and coupled positive and negative feedback loops). Finally, we review the procedures of linear stability analysis, which allow one to determine whether a given ODE model and a particular set of kinetic parameters will produce oscillations.
The eukaryotic cell cycle is characterized by alternating oscillations in the activities of cyclin-dependent kinase (Cdk) and the anaphase-promoting complex (APC). Successful completion of the cell cycle is dependent on the precise, temporally ordered appearance of these activities. A modest level of Cdk activity is sufficient to initiate DNA replication, but mitosis and APC activation require an elevated Cdk activity. In present-day eukaryotes, this temporal order is provided by a complex network of regulatory proteins that control both Cdk and APC activities via sharp thresholds, bistability, and time delays. Using simple computational models, we show here that these dynamical features of cell-cycle organization could emerge in a control system driven by a single Cdk/cyclin complex and APC wired in a negative-feedback loop. We show that ordered phosphorylation of cellular proteins could be explained by multisite phosphorylation/dephosphorylation and competition of substrates for interconverting kinase (Cdk) and phosphatase. In addition, the competition of APC substrates for ubiquitylation can create and maintain sustained oscillations in cyclin levels. We propose a sequence of models that gets closer and closer to a realistic model of cell-cycle control in yeast. Since these models lack the elaborate control mechanisms characteristic of modern eukaryotes, they suggest that bistability and time delay
After DNA damage, cells activate p53, a tumor suppressor gene, and select a cell fate (e.g., DNA repair, cell cycle arrest, or apoptosis). Recently, a p53 oscillatory behavior was observed following DNA damage. However, the relationship between this p53 oscillation and cell-fate selection is unclear. Here, we present a novel model of the DNA damage signaling pathway that includes p53 and whole cell cycle regulation and explore the relationship between p53 oscillation and cell fate selection. The simulation run without DNA damage qualitatively realized experimentally observed data from several cell cycle regulators, indicating that our model was biologically appropriate. Moreover, the comprehensive sensitivity analysis for the proposed model was implemented by changing the values of all kinetic parameters, which revealed that the cell cycle regulation system based on the proposed model has robustness on a fluctuation of reaction rate in each process. Simulations run with four different intensities of DNA damage, i.e. Low-damage, Medium-damage, High-damage, and Excess-damage, realized cell cycle arrest in all cases. Low-damage, Medium-damage, High-damage, and Excess-damage corresponded to the DNA damage caused by 100, 200, 400, and 800 J/m(2) doses of UV-irradiation, respectively, based on expression of p21, which plays a crucial role in cell cycle arrest. In simulations run with High-damage and Excess-damage, the length of the cell cycle arrest was shortened despite the severe DNA damage, and p53 began to oscillate. Cells initiated apoptosis and were killed at 400 and 800 J/m(2) doses of UV-irradiation, corresponding to High-damage and Excess-damage, respectively. Therefore, our model indicated that the oscillatory mode of p53 profoundly affects cell fate selection.
Equivalent of the stochastic model used in \"Network pharmacology model predicts combined Aurora B and ZAK inhibition in MDA-MB-231 breast cancer cells\" by Tang et. al. 2018.The only difference is cell division and partitioning of the components, which are available in the original model for SGNS2. ",
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- "name": "Gerard2010 - Progression of mammalian cell cycle by successive activation of various cyclin cdk complexes",
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We previously proposed a detailed, 39-variable model for the network of cyclin-dependent kinases (Cdks) that controls progression along the successive phases of the mammalian cell cycle. Here, we propose a skeleton, 5-variable model for the Cdk network that can be seen as the backbone of the more detailed model for the mammalian cell cycle. In the presence of sufficient amounts of growth factor, the skeleton model also passes from a stable steady state to sustained oscillations of the various cyclin/Cdk complexes. This transition corresponds to the switch from quiescence to cell proliferation. Sequential activation of the cyclin/Cdk complexes allows the ordered progression along the G1, S, G2 and M phases of the cell cycle. The 5-variable model can also account for the existence of a restriction point in G1, and for endoreplication. Like the detailed model, it contains multiple oscillatory circuits and can display complex oscillatory behaviour such as quasi-periodic oscillations and chaos. We compare the dynamical properties of the skeleton model with those of the more detailed model for the mammalian cell cycle.
Although not a traditional experimental \"method,\" mathematical modeling can provide a powerful approach for investigating complex cell signaling networks, such as those that regulate the eukaryotic cell division cycle. We describe here one modeling approach based on expressing the rates of biochemical reactions in terms of nonlinear ordinary differential equations. We discuss the steps and challenges in assigning numerical values to model parameters and the importance of experimental testing of a mathematical model. We illustrate this approach throughout with the simple and well-characterized example of mitotic cell cycles in frog egg extracts. To facilitate new modeling efforts, we describe several publicly available modeling environments, each with a collection of integrated programs for mathematical modeling. This review is intended to justify the place of mathematical modeling as a standard method for studying molecular regulatory networks and to guide the non-expert to initiate modeling projects in order to gain a systems-level perspective for complex control systems.
The p53 transcription factor is a regulator of key cellular processes including DNA repair, cell cycle arrest, and apoptosis. In this theoretical study, we investigate how the complex circuitry of the p53 network allows for stochastic yet unambiguous cell fate decision-making. The proposed Markov chain model consists of the regulatory core and two subordinated bistable modules responsible for cell cycle arrest and apoptosis. The regulatory core is controlled by two negative feedback loops (regulated by Mdm2 and Wip1) responsible for oscillations, and two antagonistic positive feedback loops (regulated by phosphatases Wip1 and PTEN) responsible for bistability. By means of bifurcation analysis of the deterministic approximation we capture the recurrent solutions (i.e., steady states and limit cycles) that delineate temporal responses of the stochastic system. Direct switching from the limit-cycle oscillations to the \"apoptotic\" steady state is enabled by the existence of a subcritical Neimark-Sacker bifurcation in which the limit cycle loses its stability by merging with an unstable invariant torus. Our analysis provides an explanation why cancer cell lines known to have vastly diverse expression levels of Wip1 and PTEN exhibit a broad spectrum of responses to DNA damage: from a fast transition to a high level of p53 killer (a p53 phosphoform which promotes commitment to apoptosis) in cells characterized by high PTEN and low Wip1 levels to long-lasting p53 level oscillations in cells having PTEN promoter methylated (as in, e.g., MCF-7 cell line).
A model for oscillations of Cdc2 kinase in embryonic cell cycles based on Michaelis\u2013Menten phosphorylation\u2013dephosphorylation kinetics shows that the occurrence and amplitude of the oscillations strongly depend on the ultrasensitivity of the enzymatic cascade that controls the activity of the cyclin-dependent kinase.
Compartment model for the antineoplastic drug topotecan. Modelling drug in its active lactone and inactive hydroxy acid forms in the medium, extracellular, cytoplasm and nucleus.
All living systems function out of equilibrium and exchange energy in the form of heat with their environment. Thus, heat flow can inform on the energetic costs of cellular processes, which are largely unknown. Here, we have repurposed an isothermal calorimeter to measure heat flow between developing zebrafish embryos and the surrounding medium. Heat flow increased over time with cell number. Unexpectedly, a prominent oscillatory component of the heat flow, with periods matching the synchronous early reductive cleavage divisions, persisted even when DNA synthesis and mitosis were blocked by inhibitors. Instead, the heat flow oscillations were driven by the phosphorylation and dephosphorylation reactions catalyzed by the cell-cycle oscillator, the biochemical network controlling mitotic entry and exit. We propose that the high energetic cost of cell-cycle signaling reflects the significant thermodynamic burden of imposing accurate and robust timing on cell proliferation during development.
Mathematical model of mitotic exit in budding yeast.
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- "id": 3239,
- "name": "Pandey2018-reversible transition between quiescence and proliferation",
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- "summary": "Cells switch between quiescence and proliferation states for maintaining tissue homeostasis and regeneration. At the restriction point (R-point), cells become irreversibly committed to the completion of the cell cycle independent of mitogen. The mechanism involving hyper-phosphorylation of retinoblastoma (Rb) and activation of transcription factor E2F is linked to the R-point passage. However, stress stimuli trigger exit from the cell cycle back to the mitogen-sensitive quiescent state after Rb hyper-phosphorylation but only until APC/CCdh1 inactivation. In this study, we developed a mathematical model to investigate the reversible transition between quiescence and proliferation in mammalian cells with respect to mitogen and stress signals. The model integrates the current mechanistic knowledge and accounts for the recent experimental observations with cells exiting quiescence and proliferating cells. We show that Cyclin E:Cdk2 couples Rb-E2F and APC/CCdh1 bistable switches and temporally segregates the R-point and the G1/S transition. A redox-dependent mutual antagonism between APC/CCdh1 and its inhibitor Emi1 makes the inactivation of APC/CCdh1 bistable. We show that the levels of Cdk inhibitor (CKI) and mitogen control the reversible transition between quiescence and proliferation. Further, we propose that shifting of the mitogen-induced transcriptional program to G2-phase in proliferating cells might result in an intermediate Cdk2 activity at the mitotic exit and in the immediate inactivation of APC/CCdh1. Our study builds a coherent framework and generates hypotheses that can be further explored by experiments.",
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- "timestamp_created": "2025-01-30 14:05:35.029076+00:00",
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- "name": "Giordano2020 - SIDARTHE model of COVID-19 spread in Italy",
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- "summary": "In Italy, 128,948 confirmed cases and 15,887 deaths of people who tested positive for SARS-CoV-2 were registered as of 5 April 2020. Ending the global SARS-CoV-2 pandemic requires implementation of multiple population-wide strategies, including social distancing, testing and contact tracing. We propose a new model that predicts the course of the epidemic to help plan an effective control strategy. The model considers eight stages of infection: susceptible (S), infected (I), diagnosed (D), ailing (A), recognized (R), threatened (T), healed (H) and extinct (E), collectively termed SIDARTHE. Our SIDARTHE model discriminates between infected individuals depending on whether they have been diagnosed and on the severity of their symptoms. The distinction between diagnosed and non-diagnosed individuals is important because the former are typically isolated and hence less likely to spread the infection. This delineation also helps to explain misperceptions of the case fatality rate and of the epidemic spread. We compare simulation results with real data on the COVID-19 epidemic in Italy, and we model possible scenarios of implementation of countermeasures. Our results demonstrate that restrictive social-distancing measures will need to be combined with widespread testing and contact tracing to end the ongoing COVID-19 pandemic.",
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- "id": 3241,
- "name": "Bertozzi2020 - SIR model of scenarios of COVID-19 spread in CA and NY",
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- "summary": "The coronavirus disease 2019 (COVID-19) pandemic has placed epidemic modeling at the forefront of worldwide public policy making. Nonetheless, modeling and forecasting the spread of COVID-19 remains a challenge. Here, we detail three regional scale models for forecasting and assessing the course of the pandemic. This work demonstrates the utility of parsimonious models for early-time data and provides an accessible framework for generating policy-relevant insights into its course. We show how these models can be connected to each other and to time series data for a particular region. Capable of measuring and forecasting the impacts of social distancing, these models highlight the dangers of relaxing nonpharmaceutical public health interventions in the absence of a vaccine or antiviral therapies.",
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- "name": "Roda2020 - SIR model of COVID-19 spread in Wuhan",
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- "summary": "=Since the COVID-19 outbreak in Wuhan City in December of 2019, numerous model predictions on the COVID-19 epidemics in Wuhan and other parts of China have been reported. These model predictions have shown a wide range of variations. In our study, we demonstrate that nonidentifiability in model calibrations using the confirmed-case data is the main reason for such wide variations. Using the Akaike Information Criterion (AIC) for model selection, we show that an SIR model performs much better than an SEIR model in representing the information contained in the confirmed-case data. This indicates that predictions using more complex models may not be more reliable compared to using a simpler model. We present our model predictions for the COVID-19 epidemic in Wuhan after the lockdown and quarantine of the city on January 23, 2020. We also report our results of modeling the impacts of the strict quarantine measures undertaken in the city after February 7 on the time course of the epidemic, and modeling the potential of a second outbreak after the return-to-work in the city.",
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- "timestamp_created": "2025-01-30 14:05:37.014152+00:00",
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- "name": "Ndairou2020 - early-stage transmission dynamics of COVID-19 in Wuhan",
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- "summary": "We propose a compartmental mathematical model for the spread of the COVID-19 disease with special focus on the transmissibility of super-spreaders individuals. We compute the basic reproduction number threshold, we study the local stability of the disease free equilibrium in terms of the basic reproduction number, and we investigate the sensitivity of the model with respect to the variation of each one of its parameters. Numerical simulations show the suitability of the proposed COVID-19 model for the outbreak that occurred in Wuhan, China",
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- "id": 3244,
- "name": "Kok2020 - IFNalpha-induced signaling in Huh7.5 cells",
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The proposed ODE model describes dynamics of IFNalpha-induced signaling in Huh7.5 cells for a time scale up to 32 hours after stimulation with IFNalpha. The model consists of an IFN receptor model, formation/degradation and cytoplasmic/nuclear shuttling of STAT1-homodimers, STAT1-STAT2-heterodimers and STAT1-STAT2-IRF9 (ISGF3) complexes. On top, formation of feedback proteins STAT1, STAT2, IRF9, USP18, SOCS1, SOCS3 and IRF2 and corresponding influences on IFNalpha signaling dynamics was incorporated. The model was calibrated by dose response and time course measurements over 32 hours as well as time courses for USP18 inhibition and overexpression experiments. As a special focus, the model is able to describe dose-dependent sensitization and desensitization of IFNalpha signaling in form of double treatment experiments at 0h and 24h.
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- "timestamp_created": "2025-01-30 14:05:38.057107+00:00",
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- "id": 3245,
- "name": "Paiva2020 - SEIAHRD model of transmission dynamics of COVID-19",
- "repository_type": "biomodels",
- "summary": "This paper proposes a dynamic model to describe and forecast the dynamics of the coronavirus disease COVID-19 transmission. The model is based on an approach previously used to describe the Middle East Respiratory Syndrome (MERS) epidemic. This methodology is used to describe the COVID-19 dynamics in six countries where the pandemic is widely spread, namely China, Italy, Spain, France, Germany, and the USA. For this purpose, data from the European Centre for Disease Prevention and Control (ECDC) are adopted. It is shown how the model can be used to forecast new infection cases and new deceased and how the uncertainties associated to this prediction can be quantified. This approach has the advantage of being relatively simple, grouping in few mathematical parameters the many conditions which affect the spreading of the disease. On the other hand, it requires previous data from the disease transmission in the country, being better suited for regions where the epidemic is not at a very early stage. With the estimated parameters at hand, one can use the model to predict the evolution of the disease, which in turn enables authorities to plan their actions. Moreover, one key advantage is the straightforward interpretation of these parameters and their influence over the evolution of the disease, which enables altering some of them, so that one can evaluate the effect of public policy, such as social distancing. The results presented for the selected countries confirm the accuracy to perform predictions.",
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- {
- "id": 4459,
- "tag": "BioModels:BIOMD0000000960"
- },
- {
- "id": 2456,
- "tag": "COVID-19"
- },
- {
- "id": 3002,
- "tag": "Homo sapiens"
- },
- {
- "id": 704,
- "tag": "SBML"
- },
- {
- "id": 4454,
- "tag": "Severe acute respiratory syndrome coronavirus 2"
- }
- ],
- "timestamp_created": "2025-01-30 14:05:38.664144+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000000960",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3246": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "12",
- "id": 3246,
- "name": "McDougal2017 - Metabolism in ischemic cardiomyocytes",
- "repository_type": "biomodels",
- "summary": "Heart disease remains the leading cause of death globally. Although reperfusion following myocardial ischemia can prevent death by restoring nutrient flow, ischemia/reperfusion injury can cause significant heart damage. The mechanisms that drive ischemia/reperfusion injury are not well understood; currently, few methods can predict the state of the cardiac muscle cell and its metabolic conditions during ischemia. Here, we explored the energetic sustainability of cardiomyocytes, using a model for cellular metabolism to predict the levels of ATP following hypoxia. We modeled glycolytic metabolism with a system of coupled ordinary differential equations describing the individual metabolic reactions within the cardiomyocyte over time. Reduced oxygen levels and ATP consumption rates were simulated to characterize metabolite responses to ischemia. By tracking biochemical species within the cell, our model enables prediction of the cell\u2019s condition up to the moment of reperfusion. The simulations revealed a distinct transition between energetically sustainable and unsustainable ATP concentrations for various energetic demands. Our model illustrates how even low oxygen concentrations allow the cell to perform essential functions. We found that the oxygen level required for a sustainable level of ATP increases roughly linearly with the ATP consumption rate. An extracellular O2 concentration of ~0.007 mM could supply basic energy needs in non-beating cardiomyocytes, suggesting that increased collateral circulation may provide an important source of oxygen to sustain the cardiomyocyte during extended ischemia. Our model provides a time-dependent framework for studying various intervention strategies to change the outcome of reperfusion.",
- "tags": [
- {
- "id": 2936,
- "tag": "BioModels"
- },
- {
- "id": 4460,
- "tag": "BioModels:BIOMD0000000961"
- },
- {
- "id": 704,
- "tag": "SBML"
- }
- ],
- "timestamp_created": "2025-01-30 14:05:39.222455+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000000961",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3247": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "7",
- "id": 3247,
- "name": "Zhao2020 - SUQC model of COVID-19 transmission dynamics in Wuhan, Hubei, and China",
- "repository_type": "biomodels",
- "summary": "Background - The coronavirus disease 2019 (COVID-19) is rapidly spreading in China and more than 30 countries over last two months. COVID-19 has multiple characteristics distinct from other infectious diseases, including high infectivity during incubation, time delay between real dynamics and daily observed number of confirmed cases, and the intervention effects of implemented quarantine and control measures. Methods - We develop a Susceptible, Un-quanrantined infected, Quarantined infected, Confirmed infected (SUQC) model to characterize the dynamics of COVID-19 and explicitly parameterize the intervention effects of control measures, which is more suitable for analysis than other existing epidemic models. Results - The SUQC model is applied to the daily released data of the confirmed infections to analyze the outbreak of COVID-19 in Wuhan, Hubei (excluding Wuhan), China (excluding Hubei) and four first-tier cities of China. We found that, before January 30, 2020, all these regions except Beijing had a reproductive number R &gt; 1, and after January 30, all regions had a reproductive number R lesser than 1, indicating that the quarantine and control measures are effective in preventing the spread of COVID-19. The confirmation rate of Wuhan estimated by our model is 0.0643, substantially lower than that of Hubei excluding Wuhan (0.1914), and that of China excluding Hubei (0.2189), but it jumps to 0.3229 after February 12 when clinical evidence was adopted in new diagnosis guidelines. The number of unquarantined infected cases in Wuhan on February 12, 2020 is estimated to be 3,509 and declines to 334 on February 21, 2020. After fitting the model with data as of February 21, 2020, we predict that the end time of COVID-19 in Wuhan and Hubei is around late March, around mid March for China excluding Hubei, and before early March 2020 for the four tier-one cities. A total of 80,511 individuals are estimated to be infected in China, among which 49,510 are from Wuhan, 17,679 from Hubei (excluding Wuhan), and the rest 13,322 from other regions of China (excluding Hubei). Note that the estimates are from a deterministic ODE model and should be interpreted with some uncertainty. Conclusions - We suggest that rigorous quarantine and control measures should be kept before early March in Beijing, Shanghai, Guangzhou and Shenzhen, and before late March in Hubei. The model can also be useful to predict the trend of epidemic and provide quantitative guide for other countries at high risk of outbreak, such as South Korea, Japan, Italy and Iran.",
- "tags": [
- {
- "id": 2936,
- "tag": "BioModels"
- },
- {
- "id": 4461,
- "tag": "BioModels:BIOMD0000000962"
- },
- {
- "id": 2456,
- "tag": "COVID-19"
- },
- {
- "id": 3002,
- "tag": "Homo sapiens"
- },
- {
- "id": 704,
- "tag": "SBML"
- },
- {
- "id": 4454,
- "tag": "Severe acute respiratory syndrome coronavirus 2"
- }
- ],
- "timestamp_created": "2025-01-30 14:05:39.731729+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000000962",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3248": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "7",
- "id": 3248,
- "name": "Weitz2020 - SIR model of COVID-19 transmission with shielding",
- "repository_type": "biomodels",
- "summary": "The COVID-19 pandemic has precipitated a global crisis, with more than 1,430,000 confirmed cases and more than 85,000 confirmed deaths globally as of 9 April 2020. Mitigation and suppression of new infections have emerged as the two predominant public health control strategies. Both strategies focus on reducing new infections by limiting human-to-human interactions, which could be both socially and economically unsustainable in the long term. We have developed and analyzed an epidemiological intervention model that leverages serological tests to identify and deploy recovered individuals as focal points for sustaining safer interactions via interaction substitution, developing what we term \u2018shield immunity\u2019 at the population scale. The objective of a shield immunity strategy is to help to sustain the interactions necessary for the functioning of essential goods and services while reducing the probability of transmission. Our shield immunity approach could substantively reduce the length and reduce the overall burden of the current outbreak, and can work synergistically with social distancing. The present model highlights the value of serological testing as part of intervention strategies, in addition to its well-recognized roles in estimating prevalence and in the potential development of plasma-based therapies.",
- "tags": [
- {
- "id": 2936,
- "tag": "BioModels"
- },
- {
- "id": 4462,
- "tag": "BioModels:BIOMD0000000963"
- },
- {
- "id": 2456,
- "tag": "COVID-19"
- },
- {
- "id": 3002,
- "tag": "Homo sapiens"
- },
- {
- "id": 704,
- "tag": "SBML"
- },
- {
- "id": 4454,
- "tag": "Severe acute respiratory syndrome coronavirus 2"
- }
- ],
- "timestamp_created": "2025-01-30 14:05:40.289042+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000000963",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3249": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "6",
- "id": 3249,
- "name": "Mwalili2020 - SEIR model of COVID-19 transmission and environmental pathogen prevalence",
- "repository_type": "biomodels",
- "summary": "Objective: Coronavirus disease 2019 (COVID-19) is a pandemic respiratory illness spreading from person-to-person caused by a novel coronavirus and poses a serious public health risk. The goal of this study was to apply a modified susceptible-exposed-infectious-recovered (SEIR) compartmental mathematical model for prediction of COVID-19 epidemic dynamics incorporating pathogen in the environment and interventions. The next generation matrix approach was used to determine the basic reproduction number R0. The model equations are solved numerically using fourth and ffth order Runge\u2013Kutta methods. Results: We found an R0 of 2.03, implying that the pandemic will persist in the human population in the absence of strong control measures. Results after simulating various scenarios indicate that disregarding social distancing and hygiene measures can have devastating effects on the human population. The model shows that quarantine of contacts and isolation of cases can help halt the spread on novel coronavirus.",
- "tags": [
- {
- "id": 2936,
- "tag": "BioModels"
- },
- {
- "id": 4463,
- "tag": "BioModels:BIOMD0000000964"
- },
- {
- "id": 2456,
- "tag": "COVID-19"
- },
- {
- "id": 3002,
- "tag": "Homo sapiens"
- },
- {
- "id": 704,
- "tag": "SBML"
- },
- {
- "id": 4454,
- "tag": "Severe acute respiratory syndrome coronavirus 2"
- }
- ],
- "timestamp_created": "2025-01-30 14:05:40.845256+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000000964",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3250": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "6",
- "id": 3250,
- "name": "LeBeau1999 - IP3-dependent intracellular calcium oscillations due to agonist stimulation from Cholecytokinin",
- "repository_type": "biomodels",
- "summary": "The properties of inositol 1,4,5-trisphosphate (IP3)-dependent intracellular calcium oscillations in pancreatic acinar cells depend crucially on the agonist used to stimulate them. Acetylcholine or carbachol (CCh) cause high-frequency (10\u201312-s period) calcium oscillations that are superimposed on a raised baseline, while cholecystokinin (CCK) causes long-period (.100-s period) baseline spiking. We show that physiological concentrations of CCK induce rapid phosphorylation of the IP3 receptor, which is not true of physiological concentrations of CCh. Based on this and other experimental data, we construct a mathematical model of agonist-specific intracellular calcium oscillations in pancreatic acinar cells. Model simulations agree with previous experimental work on the rates of activation and inactivation of the IP3 receptor by calcium (DuFour, J.-F., I.M. Arias, and T.J. Turner. 1997. J. Biol. Chem. 272:2675\u20132681), and reproduce both short-period, raised baseline oscillations, and long-period baseline spiking. The steady state open probability curve of the model IP3 receptor is an increasing function of calcium concentration, as found for type-III IP3 receptors by Hagar et al. (Hagar, R.E., A.D. Burgstahler, M.H. Nathanson, and B.E. Ehrlich. 1998. Nature. 396:81\u201384). We use the model to predict the effect of the removal of external calcium, and this prediction is confirmed experimentally. We also predict that, for type-III IP3 receptors, the steady state open probability curve will shift to lower calcium concentrations as the background IP3 concentration increases. We conclude that the differences between CCh- and CCK-induced calcium oscillations in pancreatic acinar cells can be explained by two principal mechanisms: (a) CCK causes more phosphorylation of the IP3 receptor than does CCh, and the phosphorylated receptor cannot pass calcium current; and (b) the rate of calcium ATPase pumping and the rate of calcium influx from the outside the cell are greater in the presence of CCh than in the presence of CCK.",
- "tags": [
- {
- "id": 2936,
- "tag": "BioModels"
- },
- {
- "id": 4464,
- "tag": "BioModels:BIOMD0000000965"
- },
- {
- "id": 704,
- "tag": "SBML"
- }
- ],
- "timestamp_created": "2025-01-30 14:05:41.456180+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000000965",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3251": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "6",
- "id": 3251,
- "name": "Cui2008 - in vitro transcriptional response of zinc homeostasis system in Escherichia coli",
- "repository_type": "biomodels",
- "summary": "BACKGROUND: The zinc homeostasis system in Escherichia coli is one of the most intensively studied prokaryotic zinc homeostasis systems. Its underlying regulatory machine consists of repression on zinc influx through ZnuABC by Zur (Zn2+ uptake regulator) and activation on zinc efflux via ZntA by ZntR (a zinc-responsive regulator). Although these transcriptional regulations seem to be well characterized, and there is an abundance of detailed in vitro experimental data available, as yet there is no mathematical model to help interpret these data. To our knowledge, the work described here is the first attempt to use a mathematical model to simulate these regulatory relations and to help explain the in vitro experimental data. RESULTS: We develop a unified mathematical model consisting of 14 reactions to simulate the in vitro transcriptional response of the zinc homeostasis system in E. coli. Firstly, we simulate the in vitro Zur-DNA interaction by using two of these reactions, which are expressed as 4 ordinary differential equations (ODEs). By imposing the conservation restraints and solving the relevant steady state equations, we find that the simulated sigmoidal curve matches the corresponding experimental data. Secondly, by numerically solving the ODEs for simulating the Zur and ZntR run-off transcription experiments, and depicting the simulated concentrations of zntA and znuC transcripts as a function of free zinc concentration, we find that the simulated curves fit the corresponding in vitro experimental data. Moreover, we also perform simulations, after taking into consideration the competitive effects of ZntR with the zinc buffer, and depict the simulated concentration of zntA transcripts as a function of the total ZntR concentration, both in the presence and absence of Zn(II). The obtained simulation results are in general agreement with the corresponding experimental data. CONCLUSION: Simulation results show that our model can quantitatively reproduce the results of several of the in vitro experiments conducted by Outten CE and her colleagues. Our model provides a detailed insight into the dynamics of the regulatory system and also provides a general framework for simulating in vitro metal-binding and transcription experiments and interpreting the relevant experimental data.",
- "tags": [
- {
- "id": 2936,
- "tag": "BioModels"
- },
- {
- "id": 4465,
- "tag": "BioModels:BIOMD0000000966"
- },
- {
- "id": 2994,
- "tag": "Escherichia coli"
- },
- {
- "id": 4238,
- "tag": "Ordinary differential equation model"
- },
- {
- "id": 704,
- "tag": "SBML"
- },
- {
- "id": 4466,
- "tag": "Zinc ion homeostasis"
- }
- ],
- "timestamp_created": "2025-01-30 14:05:42.084484+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000000966",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3252": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "5",
- "id": 3252,
- "name": "McLean1991 - Behaviour of HIV in the presence of zidovudine",
- "repository_type": "biomodels",
- "summary": "A new mechanism is proposed for the apparent breakthrough of HIV that occurs approximately 6 months after the commencement of therapy with zidovudine (AZT). Using a simple mathematical model of the interacting population dynamics of HIV and its major host cell in the circulation (the CD4+ lymphocyte), predicted patterns of HIV plasma viraemia in the weeks following treatment with zidovudine are generated. These are in close agreement with observed patterns despite the fact that the model contains no mechanisms for the development of drug-resistant strains of virus. It is suggested that the patterns of viral abundance observed during the first 6 months after treatment may be the result of non-linearities in the interactions between HIV and CD4+ cells, and that it is only after the first post-treatment burst of viral production that drug resistance plays an important role.",
- "tags": [
- {
- "id": 2936,
- "tag": "BioModels"
- },
- {
- "id": 4467,
- "tag": "BioModels:BIOMD0000000967"
- },
- {
- "id": 3002,
- "tag": "Homo sapiens"
- },
- {
- "id": 4468,
- "tag": "Human immunodeficiency virus"
- },
- {
- "id": 704,
- "tag": "SBML"
- }
- ],
- "timestamp_created": "2025-01-30 14:05:42.572564+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000000967",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3253": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "6",
- "id": 3253,
- "name": "Palmer2008 - Negative Feedback in IL-7 mediated Jak-Stat signaling",
- "repository_type": "biomodels",
- "summary": "Interleukin-7 (IL-7) is an essential cytokine for the development and homeostatic maintenance of T and B lymphocytes. Binding of IL-7 to its cognate receptor, the IL-7 receptor (IL-7R), activates multiple pathways that regulate lymphocyte survival, glucose uptake, proliferation and differentiation. There has been much interest in understanding how IL-7 receptor signaling is modulated at multiple interconnected network levels. This review examines how the strength of the signal through the IL-7 receptor is modulated in T and B cells, including the use of shared receptor components, signaling crosstalk, shared interaction domains, feedback loops, integrated generegulation, multimerization and ligand competition. We discuss how these network control mechanisms could integrate to govern the properties of IL-7R signaling in lymphocytes in health and disease. Analysis of IL-7 receptor signaling at a network level in a systematic manner will allow for a comprehensive approach to understanding the impact of multiple signaling pathways on lymphocyte biology.",
- "tags": [
- {
- "id": 2936,
- "tag": "BioModels"
- },
- {
- "id": 4469,
- "tag": "BioModels:BIOMD0000000968"
- },
- {
- "id": 3002,
- "tag": "Homo sapiens"
- },
- {
- "id": 704,
- "tag": "SBML"
- }
- ],
- "timestamp_created": "2025-01-30 14:05:43.069570+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000000968",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3254": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "4",
- "id": 3254,
- "name": "Cuadros2020 - SIHRD spatiotemporal model of COVID-19 transmission in Ohio",
- "repository_type": "biomodels",
- "summary": "The role of geospatial disparities in the dynamics of the COVID-19 pandemic is poorly understood. We developed a spatially-explicit mathematical model to simulate transmission dynamics of COVID-19 disease infection in relation with the uneven distribution of the healthcare capacity in Ohio, U.S. The results showed substantial spatial variation in the spread of the disease, with localized areas showing marked differences in disease attack rates. Higher COVID-19 attack rates experienced in some highly connected and urbanized areas (274 cases per 100,000 people) could substantially impact the critical health care response of these areas regardless of their potentially high healthcare capacity compared to more rural and less connected counterparts (85 cases per 100,000). Accounting for the spatially uneven disease diffusion linked to the geographical distribution of the critical care resources is essential in designing effective prevention and control programmes aimed at reducing the impact of COVID-19 pandemic.",
- "tags": [
- {
- "id": 2936,
- "tag": "BioModels"
- },
- {
- "id": 4470,
- "tag": "BioModels:BIOMD0000000969"
- },
- {
- "id": 2456,
- "tag": "COVID-19"
- },
- {
- "id": 3002,
- "tag": "Homo sapiens"
- },
- {
- "id": 704,
- "tag": "SBML"
- },
- {
- "id": 4454,
- "tag": "Severe acute respiratory syndrome coronavirus 2"
- }
- ],
- "timestamp_created": "2025-01-30 14:05:43.592028+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000000969",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3255": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "4",
- "id": 3255,
- "name": "Hou2020 - SEIR model of COVID-19 transmission in Wuhan",
- "repository_type": "biomodels",
- "summary": "A novel coronavirus pneumonia, first identified in Wuhan City and referred to as COVID-19 by the World Health Organization, has been quickly spreading to other cities and countries. To control the epidemic, the Chinese government mandated a quarantine of the Wuhan city on January 23, 2020. To explore the effectiveness of the quarantine of the Wuhan city against this epidemic, transmission dynamics of COVID-19 have been estimated. A well-mixed "susceptible exposed infectious recovered" (SEIR) compartmental model was employed to describe the dynamics of the COVID-19 epidemic based on epidemiological characteristics of individuals, clinical progression of COVID-19, and quarantine intervention measures of the authority. Considering infected individuals as contagious during the latency period, the well-mixed SEIR model fitting results based on the assumed contact rate of latent individuals are within 6-18, which represented the possible impact of quarantine and isolation interventions on disease infections, whereas other parameter were suppose as unchanged under the current intervention. The present study shows that, by reducing the contact rate of latent individuals, interventions such as quarantine and isolation can effectively reduce the potential peak number of COVID-19 infections and delay the time of peak infection.",
- "tags": [
- {
- "id": 2936,
- "tag": "BioModels"
- },
- {
- "id": 4471,
- "tag": "BioModels:BIOMD0000000970"
- },
- {
- "id": 3002,
- "tag": "Homo sapiens"
- },
- {
- "id": 704,
- "tag": "SBML"
- },
- {
- "id": 4454,
- "tag": "Severe acute respiratory syndrome coronavirus 2"
- }
- ],
- "timestamp_created": "2025-01-30 14:05:44.092021+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000000970",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3256": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "4",
- "id": 3256,
- "name": "Tang2020 - Estimation of transmission risk of COVID-19 and impact of public health interventions",
- "repository_type": "biomodels",
- "summary": "Since the emergence of the first cases in Wuhan, China, the novel coronavirus (2019-nCoV) infection has been quickly spreading out to other provinces and neighboring countries. Estimation of the basic reproduction number by means of mathematical modeling can be helpful for determining the potential and severity of an outbreak and providing critical information for identifying the type of disease interventions and intensity. A deterministic compartmental model was devised based on the clinical progression of the disease, epidemiological status of the individuals, and intervention measures. The estimations based on likelihood and model analysis show that the control reproduction number may be as high as 6.47 (95% CI 5.71\u20137.23). Sensitivity analyses show that interventions, such as intensive contact tracing followed by quarantine and isolation, can effectively reduce the control reproduction number and transmission risk, with the effect of travel restriction adopted by Wuhan on 2019-nCoV infection in Beijing being almost equivalent to increasing quarantine by a 100 thousand baseline value. It is essential to assess how the expensive, resource-intensive measures implemented by the Chinese authorities can contribute to the prevention and control of the 2019-nCoV infection, and how long they should be maintained. Under the most restrictive measures, the outbreak is expected to peak within two weeks (since 23 January 2020) with a significant low peak value. With travel restriction (no imported exposed individuals to Beijing), the number of infected individuals in seven days will decrease by 91.14% in Beijing, compared with the scenario of no travel restriction.",
- "tags": [
- {
- "id": 2936,
- "tag": "BioModels"
- },
- {
- "id": 4472,
- "tag": "BioModels:BIOMD0000000971"
- },
- {
- "id": 3002,
- "tag": "Homo sapiens"
- },
- {
- "id": 704,
- "tag": "SBML"
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- {
- "id": 4454,
- "tag": "Severe acute respiratory syndrome coronavirus 2"
- }
- ],
- "timestamp_created": "2025-01-30 14:05:44.585919+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000000971",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "3257": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "4",
- "id": 3257,
- "name": "Tang2020 - Estimation of transmission risk of COVID-19 and impact of public health interventions - update",
- "repository_type": "biomodels",
- "summary": "The basic reproduction number of an infectious agent is the average number of infections one case can generate over the course of the infectious period, in a na\u00efve, uninfected population. It is well-known that the estimation of this number may vary due to several methodological issues, including different assumptions and choice of parameters, utilized models, used datasets and estimation period. With the spreading of the novel coronavirus (2019-nCoV) infection, the reproduction number has been found to vary, reflecting the dynamics of transmission of the coronavirus outbreak as well as the case reporting rate. Due to significant variations in the control strategies, which have been changing over time, and thanks to the introduction of detection technologies that have been rapidly improved, enabling to shorten the time from infection/symptoms onset to diagnosis, leading to faster confirmation of the new coronavirus cases, our previous estimations on the transmission risk of the 2019-nCoV need to be revised. By using time-dependent contact and diagnose rates, we refit our previously proposed dynamics transmission model to the data available until January 29th, 2020 and re-estimated the effective daily reproduction ratio that better quantifies the evolution of the interventions. We estimated when the effective daily reproduction ratio has fallen below 1 and when the epidemics will peak. Our updated findings suggest that the best measure is persistent and strict self-isolation. The epidemics will continue to grow, and can peak soon with the peak time depending highly on the public health interventions practically implemented.",
- "tags": [
- {
- "id": 2936,
- "tag": "BioModels"
- },
- {
- "id": 4473,
- "tag": "BioModels:BIOMD0000000972"
- },
- {
- "id": 3002,
- "tag": "Homo sapiens"
- },
- {
- "id": 704,
- "tag": "SBML"
- },
- {
- "id": 4454,
- "tag": "Severe acute respiratory syndrome coronavirus 2"
- }
- ],
- "timestamp_created": "2025-01-30 14:05:45.078006+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000000972",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3258": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "4",
- "id": 3258,
- "name": "Dasgupta2020 - Reduced model of receptor clusturing and aggregation",
- "repository_type": "biomodels",
- "summary": "a simple kinetic mass-action-law-based model could be utilized to adequately describe clustering inresponse to activation both in 2D and in 3D",
- "tags": [
- {
- "id": 2936,
- "tag": "BioModels"
- },
- {
- "id": 4474,
- "tag": "BioModels:BIOMD0000000973"
- },
- {
- "id": 3002,
- "tag": "Homo sapiens"
- },
- {
- "id": 704,
- "tag": "SBML"
- }
- ],
- "timestamp_created": "2025-01-30 14:05:45.585436+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000000973",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3259": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "4",
- "id": 3259,
- "name": "Carcione2020 - Deterministic SEIR simulation of a COVID-19 outbreak",
- "repository_type": "biomodels",
- "summary": "An epidemic disease caused by a new coronavirus has spread in Northern Italy with a strong contagion rate. We implement an SEIR model to compute the infected population and the number of casualties of this epidemic. The example may ideally regard the situation in the Italian Region of Lombardy, where the epidemic started on February 24, but by no means attempts to perform a rigorous case study in view of the lack of suitable data and the uncertainty of the different parameters, namely, the variation of the degree of home isolation and social distancing as a function of time, the initial number of exposed individuals and infected people, the incubation and infectious periods, and the fatality rate. First, we perform an analysis of the results of the model by varying the parameters and initial conditions (in order for the epidemic to start, there should be at least one exposed or one infectious human). Then, we consider the Lombardy case and calibrate the model with the number of dead individuals to date (May 5, 2020) and constrain the parameters on the basis of values reported in the literature. The peak occurs at day 37 (March 31) approximately, with a reproduction ratio R0 of 3 initially, 1.36 at day 22, and 0.8 after day 35, indicating different degrees of lockdown. The predicted death toll is approximately 15,600 casualties, with 2.7 million infected individuals at the end of the epidemic. The incubation period providing a better fit to the dead individuals is 4.25 days, and the infectious period is 4 days, with a fatality rate of 0.00144/day [values based on the reported (official) number of casualties]. The infection fatality rate (IFR) is 0.57%, and it is 2.37% if twice the reported number of casualties is assumed. However, these rates depend on the initial number of exposed individuals. If approximately nine times more individuals are exposed, there are three times more infected people at the end of the epidemic and IFR = 0.47%. If we relax these constraints and use a wider range of lower and upper bounds for the incubation and infectious periods, we observe that a higher incubation period (13 vs. 4.25 days) gives the same IFR (0.6 vs. 0.57%), but nine times more exposed individuals in the first case. Other choices of the set of parameters also provide a good fit to the data, but some of the results may not be realistic. Therefore, an accurate determination of the fatality rate and characteristics of the epidemic is subject to knowledge of the precise bounds of the parameters. Besides the specific example, the analysis proposed in this work shows how isolation measures, social distancing, and knowledge of the diffusion conditions help us to understand the dynamics of the epidemic. Hence, it is important to quantify the process to verify the effectiveness of the lockdown.",
- "tags": [
- {
- "id": 2936,
- "tag": "BioModels"
- },
- {
- "id": 4475,
- "tag": "BioModels:BIOMD0000000974"
- },
- {
- "id": 3002,
- "tag": "Homo sapiens"
- },
- {
- "id": 704,
- "tag": "SBML"
- },
- {
- "id": 4454,
- "tag": "Severe acute respiratory syndrome coronavirus 2"
- }
- ],
- "timestamp_created": "2025-01-30 14:05:46.130327+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000000974",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3260": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "6",
- "id": 3260,
- "name": "Leloup2004 - Mammalian Circadian Rhythm models for 23.8 and 24.2 hours timeperiod",
- "repository_type": "biomodels",
- "summary": "We extend the study of a computational model recently proposed for the mammalian circadian clock (Proc. Natl Acad. Sci. USA 100 (2003) 7051). The model, based on the intertwined positive and negative regulatory loops involving the Per, Cry, Bmal1, and Clock genes, can give rise to sustained circadian oscillations in conditions of continuous darkness. These limit cycle oscillations correspond to circadian rhythms autonomously generated by suprachiasmatic nuclei and by some peripheral tissues. By using different sets of parameter values producing circadian oscillations, we compare the effect of the various parameters and show that both the occurrence and the period of the oscillations are generally most sensitive to parameters related to synthesis or degradation of Bmal1 mRNA and BMAL1 protein. The mechanism of circadian oscillations relies on the formation of an inactive complex between PER and CRY and the activators CLOCK and BMAL1 that enhance Per and Cry expression. Bifurcation diagrams and computer simulations nevertheless indicate the possible existence of a second source of oscillatory behavior. Thus, sustained oscillations might arise from the sole negative autoregulation of Bmal1 expression. This second oscillatory mechanism may not be functional in physiological conditions, and its period need not necessarily be circadian. When incorporating the light-induced expression of the Per gene, the model accounts for entrainment of the oscillations by light-dark (LD) cycles. Long-term suppression of circadian oscillations by a single light pulse can occur in the model when a stable steady state coexists with a stable limit cycle. The phase of the oscillations upon entrainment in LD critically depends on the parameters that govern the level of CRY protein. Small changes in the parameters governing CRY levels can shift the peak in Per mRNA from the L to the D phase, or can prevent entrainment. The results are discussed in relation to physiological disorders of the sleep-wake cycle linked to perturbations of the human circadian clock, such as the familial advanced sleep phase syndrome or the non-24h sleep-wake syndrome.",
- "tags": [
- {
- "id": 2936,
- "tag": "BioModels"
- },
- {
- "id": 4476,
- "tag": "BioModels:BIOMD0000000975"
- },
- {
- "id": 4069,
- "tag": "Entrainment of circadian clock by photoperiod"
- },
- {
- "id": 3002,
- "tag": "Homo sapiens"
- },
- {
- "id": 704,
- "tag": "SBML"
- }
- ],
- "timestamp_created": "2025-01-30 14:05:46.642495+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000000975",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3261": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "5",
- "id": 3261,
- "name": "Ghanbari2020 - forecasting the second wave of COVID-19 in Iran",
- "repository_type": "biomodels",
- "summary": "One of the common misconceptions about COVID-19 disease is to assume that we will not see a recurrence after the first wave of the disease has subsided. This completely wrong perception causes people to disregard the necessary protocols and engage in some misbehavior, such as routine socializing or holiday travel. These conditions will put double pressure on the medical staff and endanger the lives of many people around the world. In this research, we are interested in analyzing the existing data to predict the number of infected people in the second wave of out-breaking COVID-19 in Iran. For this purpose, a model is proposed. The mathematical analysis corresponded to the model is also included in this paper. Based on proposed numerical simulations, several scenarios of progress of COVID-19 corresponding to the second wave of the disease in the coming months, will be discussed. We predict that the second wave of will be most severe than the first one. From the results, improving the recovery rate of people with weak immune systems via appropriate medical incentives is resulted as one of the most effective prescriptions to prevent the widespread unbridled outbreak of the second wave of COVID-19.",
- "tags": [
- {
- "id": 2936,
- "tag": "BioModels"
- },
- {
- "id": 4477,
- "tag": "BioModels:BIOMD0000000976"
- },
- {
- "id": 3002,
- "tag": "Homo sapiens"
- },
- {
- "id": 704,
- "tag": "SBML"
- },
- {
- "id": 4454,
- "tag": "Severe acute respiratory syndrome coronavirus 2"
- }
- ],
- "timestamp_created": "2025-01-30 14:05:47.132200+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000000976",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3262": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "4",
- "id": 3262,
- "name": "Sarkar2020 - SAIR model of COVID-19 transmission with quarantine measures in India",
- "repository_type": "biomodels",
- "summary": "In India, 100,340 confirmed cases and 3155 confirmed deaths due to COVID-19 were reported as of May 18, 2020. Due to absence of specific vaccine or therapy, non-pharmacological interventions including so- cial distancing, contact tracing are essential to end the worldwide COVID-19. We propose a mathematical model that predicts the dynamics of COVID-19 in 17 provinces of India and the overall India. A complete scenario is given to demonstrate the estimated pandemic life cycle along with the real data or history to date, which in turn divulges the predicted inflection point and ending phase of SARS-CoV-2. The proposed model monitors the dynamics of six compartments, namely susceptible (S), asymptomatic (A), recovered (R), infected (I), isolated infected ( I q ) and quarantined susceptible ( S q ), collectively expressed SARII q S q . A sensitivity analysis is conducted to determine the robustness of model predictions to parameter values and the sensitive parameters are estimated from the real data on the COVID-19 pandemic in India. Our re- sults reveal that achieving a reduction in the contact rate between uninfected and infected individuals by quarantined the susceptible individuals, can effectively reduce the basic reproduction number. Our model simulations demonstrate that the elimination of ongoing SARS-CoV-2 pandemic is possible by combining the restrictive social distancing and contact tracing. Our predictions are based on real data with reason- able assumptions, whereas the accurate course of epidemic heavily depends on how and when quaran- tine, isolation and precautionary measures are enforced.",
- "tags": [
- {
- "id": 2936,
- "tag": "BioModels"
- },
- {
- "id": 4478,
- "tag": "BioModels:BIOMD0000000977"
- },
- {
- "id": 3002,
- "tag": "Homo sapiens"
- },
- {
- "id": 704,
- "tag": "SBML"
- },
- {
- "id": 4454,
- "tag": "Severe acute respiratory syndrome coronavirus 2"
- }
- ],
- "timestamp_created": "2025-01-30 14:05:47.622482+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000000977",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3263": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "4",
- "id": 3263,
- "name": "Mukandavire2020 - SEIR model of early COVID-19 transmission in South Africa",
- "repository_type": "biomodels",
- "summary": "The emergence and fast global spread of COVID-19 has presented one of the greatest public health challenges in modern times with no proven cure or vaccine. Africa is still early in this epidemic, therefore the extent of disease severity is not yet clear. We used a mathematical model to fit to the observed cases of COVID-19 in South Africa to estimate the basic reproductive number and critical vaccination coverage to control the disease for different hypothetical vaccine efficacy scenarios. We also estimated the percentage reduction in effective contacts due to the social distancing measures implemented. Early model estimates show that COVID-19 outbreak in South Africa had a basic reproductive number of 2.95 (95% credible interval [CrI] 2.83\u20133.33). A vaccine with 70% efficacy had the capacity to contain COVID-19 outbreak but at very higher vaccination coverage 94.44% (95% Crl 92.44\u201399.92%) with a vaccine of 100% efficacy requiring 66.10% (95% Crl 64.72\u201369.95%) coverage. Social distancing measures put in place have so far reduced the number of social contacts by 80.31% (95% Crl 79.76\u201380.85%). These findings suggest that a highly efficacious vaccine would have been required to contain COVID-19 in South Africa. Therefore, the current social distancing measures to reduce contacts will remain key in controlling the infection in the absence of vaccines and other therapeutics.",
- "tags": [
- {
- "id": 2936,
- "tag": "BioModels"
- },
- {
- "id": 4479,
- "tag": "BioModels:BIOMD0000000978"
- },
- {
- "id": 3002,
- "tag": "Homo sapiens"
- },
- {
- "id": 704,
- "tag": "SBML"
- },
- {
- "id": 4454,
- "tag": "Severe acute respiratory syndrome coronavirus 2"
- }
- ],
- "timestamp_created": "2025-01-30 14:05:48.119088+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000000978",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3264": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "5",
- "id": 3264,
- "name": "Malkov2020 - SEIRS model of COVID-19 transmission with reinfection",
- "repository_type": "biomodels",
- "summary": "Epidemiological models of COVID-19 transmission assume that recovered individuals have a fully protected immunity. To date, there is no definite answer about whether people who recover from COVID-19 can be reinfected with the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). In the absence of a clear answer about the risk of reinfection, it is instructive to consider the possible scenarios. To study the epidemiological dynamics with the possibility of reinfection, I use a Susceptible-Exposed-Infectious-Resistant-Susceptible model with the time-varying transmission rate. I consider three different ways of modeling reinfection. The crucial feature of this study is that I explore both the difference between the reinfection and no-reinfection scenarios and how the mitigation measures affect this difference. The principal results are the following. First, the dynamics of the reinfection and no-reinfection scenarios are indistinguishable before the infection peak. Second, the mitigation measures delay not only the infection peak, but also the moment when the difference between the reinfection and no-reinfection scenarios becomes prominent. These results are robust to various modeling assumptions.",
- "tags": [
- {
- "id": 2936,
- "tag": "BioModels"
- },
- {
- "id": 4480,
- "tag": "BioModels:BIOMD0000000979"
- },
- {
- "id": 3002,
- "tag": "Homo sapiens"
- },
- {
- "id": 704,
- "tag": "SBML"
- },
- {
- "id": 4454,
- "tag": "Severe acute respiratory syndrome coronavirus 2"
- }
- ],
- "timestamp_created": "2025-01-30 14:05:48.606092+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000000979",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3265": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "4",
- "id": 3265,
- "name": "Malkov2020 - SEIRS model of COVID-19 transmission with time-varying R values and reinfection",
- "repository_type": "biomodels",
- "summary": "Epidemiological models of COVID-19 transmission assume that recovered individuals have a fully pro- tected immunity. To date, there is no definite answer about whether people who recover from COVID-19 can be reinfected with the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). In the absence of a clear answer about the risk of reinfection, it is instructive to consider the possible scenarios. To study the epidemiological dynamics with the possibility of reinfection, I use a Susceptible-Exposed-Infectious- Resistant-Susceptible model with the time-varying transmission rate. I consider three different ways of modeling reinfection. The crucial feature of this study is that I explore both the difference between the reinfection and no-reinfection scenarios and how the mitigation measures affect this difference. The principal results are the following. First, the dynamics of the reinfection and no-reinfection scenarios are in- distinguishable before the infection peak. Second, the mitigation measures delay not only the infection peak, but also the moment when the difference between the reinfection and no-reinfection scenarios becomes prominent. These results are robust to various modeling assumptions.",
- "tags": [
- {
- "id": 2936,
- "tag": "BioModels"
- },
- {
- "id": 4481,
- "tag": "BioModels:BIOMD0000000980"
- },
- {
- "id": 3002,
- "tag": "Homo sapiens"
- },
- {
- "id": 704,
- "tag": "SBML"
- },
- {
- "id": 4454,
- "tag": "Severe acute respiratory syndrome coronavirus 2"
- }
- ],
- "timestamp_created": "2025-01-30 14:05:49.113648+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000000980",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3266": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "4",
- "id": 3266,
- "name": "Wan2020 - risk estimation and prediction of the transmission of COVID-19 in maninland China excluding Hubei province",
- "repository_type": "biomodels",
- "summary": "Background: In December 2019, an outbreak of coronavirus disease (later named as COVID-19) was identified in Wuhan, China and, later on, detected in other parts of China. Our aim is to evaluate the effectiveness of the evolution of interventions and self-protection measures, estimate the risk of partial lifting control measures and predict the epidemic trend of the virus in the mainland of China excluding Hubei province based on the published data and a novel mathematical model.Methods: A novel COVID-19 transmission dynamic model incorporating the intervention measures implemented in China is proposed. COVID-19 daily data of the mainland of China excluding Hubei province, including the cumulative confirmed cases, the cumulative deaths, newly confirmed cases and the cumulative recovered cases between 20 January and 3 March 2020, were archived from the National Health Commission of China (NHCC). We parameterize the model by using the Markov Chain Monte Carlo (MCMC) method and estimate the control reproduction number (Rc), as well as the effective daily reproduction ratio- Re(t), of the disease transmission in the mainland of China excluding Hubei province.Results: The estimation outcomes indicate that Rc is 3.36 (95% CI: 3.20-3.64) and Re(t) has dropped below 1 since 31 January 2020, which implies that the containment strategies implemented by the Chinese government in the mainland of China are indeed effective and magnificently suppressed COVID-19 transmission. Moreover, our results show that relieving personal protection too early may lead to a prolonged disease transmission period and more people would be infected, and may even cause a second wave of epidemic or outbreaks. By calculating the effective reproduction ratio, we prove that the contact rate should be kept at least less than 30% of the normal level by April, 2020.Conclusions: To ensure the pandemic ending rapidly, it is necessary to maintain the current integrated restrict interventions and self-protection measures, including travel restriction, quarantine of entry, contact tracing followed by quarantine and isolation and reduction of contact, like wearing masks, keeping social distance, etc. People should be fully aware of the real-time epidemic situation and keep sufficient personal protection until April. If all the above conditions are met, the outbreak is expected to be ended by April in the mainland of China apart from Hubei province.",
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- "id": 4482,
- "tag": "BioModels:BIOMD0000000981"
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- "timestamp_created": "2025-01-30 14:05:49.680192+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000000981",
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- "id": 3267,
- "name": "Law2020 - SIR model of COVID-19 transmission in Malyasia with time-varying parameters",
- "repository_type": "biomodels",
- "summary": "The susceptible-infectious-removed (SIR) model offers the simplest framework to study transmission dynamics of COVID-19, however, it does not factor in its early depleting trend observed during a lockdown. We modified the SIR model to specifically simulate the early depleting transmission dynamics of COVID-19 to better predict its temporal trend in Malaysia. The classical SIR model was fitted to observed total (I total), active (I) and removed (R) cases of COVID-19 before lockdown to estimate the basic reproduction number. Next, the model was modified with a partial time-varying force of infection, given by a proportionally depleting transmission coefficient, [Formula: see text] and a fractional term, z. The modified SIR model was then fitted to observed data over 6 weeks during the lockdown. Model fitting and projection were validated using the mean absolute percent error (MAPE). The transmission dynamics of COVID-19 was interrupted immediately by the lockdown. The modified SIR model projected the depleting temporal trends with lowest MAPE for I total, followed by I, I daily and R. During lockdown, the dynamics of COVID-19 depleted at a rate of 4.7% each day with a decreased capacity of 40%. For 7-day and 14-day projections, the modified SIR model accurately predicted I total, I and R. The depleting transmission dynamics for COVID-19 during lockdown can be accurately captured by time-varying SIR model. Projection generated based on observed data is useful for future planning and control of COVID-19.",
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- "timestamp_created": "2025-01-30 14:05:50.220609+00:00",
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- "id": 3268,
- "name": "Zongo2020 - model of COVID-19 transmission dynamics under containment measures in France",
- "repository_type": "biomodels",
- "summary": "The main objective of this paper is to address the following question: are the containment measures imposed by most of the world governments effective and sufficient to stop the epidemic of COVID-19 beyond the lock-down period? In this paper, we propose a mathematical model which allows us to investigate and analyse this problem. We show by means of the reproductive number, R0 that the containment measures appear to have slowed the growth of the outbreak. Nevertheless, these measures remain only effective as long as a very large fraction of population, p, greater than the critical value 1 \u2212 1/R0 remains confined. Using French current data, we give some simulation experiments with five scenarios including: (i) the validation of model with p estimated to 93%, (ii) the study of the effectiveness of containment measures, (iii) the study of the effectiveness of the large-scale testing, (iv) the study of the social distancing and wearing masks measures and (v) the study taking into account the combination of the large-scale test of detection of infected individuals and the social distancing with linear progressive easing of restrictions. The latter scenario was shown to be effective at overcoming the outbreak if the transmission rate decreases to 75% and the number of tests of detection is multiplied by three. We also noticed that if the measures studied in our five scenarios are taken separately then the second wave might occur at least as far as the parameter values remain unchanged.",
- "tags": [
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- "id": 4484,
- "tag": "BioModels:BIOMD0000000983"
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- "timestamp_created": "2025-01-30 14:05:50.755412+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000000983",
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- "id": 3269,
- "name": "Fang2020 - SEIR model of COVID-19 transmission considering government interventions in Wuhan",
- "repository_type": "biomodels",
- "summary": "Using the parameterized susceptible\u2010exposed\u2010infectious\u2010recovered model, we simulated the spread dynamics of coronavirus disease 2019 (COVID\u201019) outbreak and impact of different control measures, conducted the sensitivity analysis to identify the key factor, plotted the trend curve of effective reproductive number (R), and performed data fitting after the simulation. By simulation and data fitting, the model showed the peak existing confirmed cases of 59 769 arriving on 15 February 2020, with the coefficient of determination close to 1 and the fitting bias 3.02%, suggesting high precision of the datafitting results. More rigorous government control policies were associated with a slower increase in the infected population. Isolation and protective procedures would be less effective as more cases accrue, so the optimization of the treatment plan and the development of specific drugs would be of more importance. There was an upward trend of R in the beginning, followed by a downward trend, a temporary rebound, and another continuous decline. The feature of high infectiousness for severe acute respiratory syndrome coronavirus 2(SARS\u2010CoV\u20102) led to an upward trend, and government measures contributed to the temporary rebound and declines. The declines of R could be exploited as strong evidence for the effectiveness of the interventions. Evidence from the fourphase stringent measures showed that it was significant to ensure early detection, early isolation, early treatment, adequate medical supplies, patients\u2019 being admitted to designated hospitals, and comprehensive therapeutic strategy. Collaborative efforts are required to combat the novel coronavirus, focusing on both persistent strict domestic interventions and vigilance against exogenous imported cases.",
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- "timestamp_created": "2025-01-30 14:05:51.251248+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000000984",
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- "id": 3270,
- "name": "Gex-Fabry1984 - model of receptor-mediated endocytosis of EGF in BALB/c 3T3 cells",
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- "summary": "We present a mathematical model for analyzing, simulating, and quantitating the dynamic and steady-state characteristics of receptor-mediated endocytosis. The basic processes considered by the model are ligand-receptor binding, diffusion of receptors and ligand-receptor complexes in the plane of the membrane toward and away from coated pits, binding of ligand-receptor complexes to coated pit proteins, endocytosis of coated pit contents, degradation of ligand, and recycling of undegraded receptors. The model accounts quantitatively for a wide variety of kinetic data and makes new predictions about steady-state characteristics. We show that for homogeneous receptors the slope of the Scatchard plot is not necessarily constant but can have a positive or negative derivative, depending on the concentration of coated pit proteins and their reactivity. This finding suggests that binding data, which show linear and concave curves, might be explainable be a simple coated pit-related mechanism. Similarly the relationship between the x-intercept and the number of receptors is also affected by kinetic parameters controlling endocytosis. We briefly discuss these results in terms of possible mechanisms for the action of tumor promoters, the large variations in receptor number and affinity in the literature, and methods for quantitative characterization of parameters.",
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- "timestamp_created": "2025-01-30 14:05:51.808776+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000000985",
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- "id": 3271,
- "name": "Aubry1995 - Multi-compartment model of fluid-phase endocytosis kinetics in Dictyostelium discoideum",
- "repository_type": "biomodels",
- "summary": "Fluid-phase endoeytosis (pinocytosis) kinetics were studied in Dictyostelium discoideum amoebae from the axenic strain Ax-2 that exhibits high rates of fluid-phase endoeytosis when cultured in liquid nutrient media. Fluorescein-labelled dextran (FITC-dextran) was used as a marker in continuous uptake- and in pulse-chase exocytosis experiments. In the latter case, efflux of the marker was monitored on cells loaded for short periods of time and resuspended in marker-free medium. A multicompartmental model was developed which describes satisfactorily fluid-phase endocytosis kinetics. In particular, it accounts correctly for the extended latency period before exocytosis in pulse-chase experiments and it suggests the existence of some sorts of maturation stages in the pathway.",
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- "tag": "Dictyostelium discoideum AX2"
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- "timestamp_created": "2025-01-30 14:05:52.387993+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000000986",
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- "id": 3272,
- "name": "Aubry1995 - Nine-compartment model of fluid-phase endocytosis kinetics in Dictyostelium discoideum",
- "repository_type": "biomodels",
- "summary": "Fluid-phase endoeytosis (pinocytosis) kinetics were studied in Dictyostelium discoideum amoebae from the axenic strain Ax-2 that exhibits high rates of fluid-phase endoeytosis when cultured in liquid nutrient media. Fluorescein-labelled dextran (FITC-dextran) was used as a marker in continuous uptake- and in pulse-chase exocytosis experiments. In the latter case, efflux of the marker was monitored on cells loaded for short periods of time and resuspended in marker-free medium. A multicompartmental model was developed which describes satisfactorily fluid-phase endocytosis kinetics. In particular, it accounts correctly for the extended latency period before exocytosis in pulse-chase experiments and it suggests the existence of some sorts of maturation stages in the pathway.",
- "tags": [
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- "id": 2936,
- "tag": "BioModels"
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- {
- "id": 4489,
- "tag": "BioModels:BIOMD0000000987"
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- "timestamp_created": "2025-01-30 14:05:52.953007+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000000987",
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- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
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- "id": 3273,
- "name": "Westerhoff2020 - systems biology model of the coronavirus pandemic 2020",
- "repository_type": "biomodels",
- "summary": "
Using standard systems biology methodologies a 14-compartment dynamic model was developed for the Corona virus epidemic. The model predicts that: (i) it will be impossible to limit lockdown intensity such that sufficient herd immunity develops for this epidemic to die down, (ii) the death toll from the SARS-CoV-2 virus decreases very strongly with increasing intensity of the lockdown, but (iii) the duration of the epidemic increases at first with that intensity and then decreases again, such that (iv) it may be best to begin with selecting a lockdown intensity beyond the intensity that leads to the maximum duration, (v) an intermittent lockdown strategy should also work and might be more acceptable socially and economically, (vi) an initially intensive but adaptive lockdown strategy should be most efficient, both in terms of its low number of casualties and shorter duration, (vii) such an adaptive lockdown strategy offers the advantage of being robust to unexpected imports of the virus, e.g. due to international travel, (viii) the eradication strategy may still be superior as it leads to even fewer deaths and a shorter period of economic downturn, but should have the adaptive strategy as backup in case of unexpected infection imports, (ix) earlier detection of infections is the most effective way in which the epidemic can be controlled, whilst waiting for vaccines.
This model simulates TGFb dose dependent kinetics of The SMADs. TGFb ligand dose applied are 1pM, 2.5pM, 5pM, 25pM, and 100pM as explained in the manuscript.
MOdel simulates 25pM ligand degradation kinetics as shown in Figure 4D
",
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- "id": 4492,
- "tag": "BioModels:BIOMD0000000990"
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- "timestamp_created": "2025-01-30 14:05:54.528327+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000000990",
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- "id": 3276,
- "name": "Okuonghae2020 - SEAIR model of COVID-19 transmission in Lagos, Nigeria",
- "repository_type": "biomodels",
- "summary": "This work examines the impact of various non-pharmaceutical control measures (government and personal) on the population dynamics of the novel coronavirus disease 2019 (COVID-19) in Lagos, Nigeria, using an appropriately formulated mathematical model. Using the available data, since its first reported case on 16 March 2020, we seek to develop a predicative tool for the cumulative number of reported cases and the number of active cases in Lagos; we also estimate the basic reproduction number of the disease outbreak in the aforementioned State in Nigeria. Using numerical simulations, we show the effect of control measures, specifically the common social distancing, use of face mask and case detection (via contact tracing and subsequent testings) on the dynamics of COVID-19. We also provide forecasts for the cumulative number of reported cases and active cases for different levels of the control measures being implemented. Numerical simulations of the model show that if at least 55% of the population comply with the social distancing regulation with about 55% of the population effectively making use of face masks while in public, the disease will eventually die out in the population and that, if we can step up the case detection rate for symptomatic individuals to about 0.8 per day, with about 55% of the population complying with the social distancing regulations, it will lead to a great decrease in the incidence (and prevalence) of COVID-19.",
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- "timestamp_created": "2025-01-30 14:05:55.105473+00:00",
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- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000000991",
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- "default_context": "15",
- "id": 3277,
- "name": "Strasen2018 - TGFb SMAD Signalling - Restimulation with 5pM TGFb at 3hr",
- "repository_type": "biomodels",
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Restimulation with 5pM TGF\u03b2 at 3hr - Figure 4E
a dynamic description for the core molecular mechanisms steering Th17 cell differentiation and use mathematical modeling to quantitatively predict the resulting molecular dynamics
The circadian rhythms influence the metabolic activity from molecular level to tissue, organ, and host level. Disruption of the circadian rhythms manifests to the host's health as metabolic syndromes, including obesity, diabetes, and elevated plasma glucose, eventually leading to cardiovascular diseases. Therefore, it is imperative to understand the mechanism behind the relationship between circadian rhythms and metabolism. To start answering this question, we propose a semimechanistic mathematical model to study the effect of circadian disruption on hepatic gluconeogenesis in humans. Our model takes the light-dark cycle and feeding-fasting cycle as two environmental inputs that entrain the metabolic activity in the liver. The model was validated by comparison with data from mice and rat experimental studies. Formal sensitivity and uncertainty analyses were conducted to elaborate on the driving forces for hepatic gluconeogenesis. Furthermore, simulating the impact of Clock gene knockout suggests that modification to the local pathways tied most closely to the feeding-fasting rhythms may be the most efficient way to restore the disrupted glucose metabolism in liver.
Its a mechanistic model explaining the impact of p53 om apoptosis decision. This model represents schema 1 of manuscript.
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- "timestamp_created": "2025-01-30 14:06:02.340910+00:00",
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- "id": 3291,
- "name": "Scaramellini1997 - Two-receptor:One-transducer (2R1T) model for analysis of interactions between agonists",
- "repository_type": "biomodels",
- "summary": "The two-receptor:one-transducerm odel (Leff, 1987) is here extended to analyze interactions between agonistsd isplaying E/[A] curves of different shapes, by incorporating slope factors into the separate and common parts of the transduction pathway. Interactions were modelled as the effect of one agonist, at fixed concentration, on the curve to the other. A variety of patterns of position and slope changes are predicted. These do not depend on the shape of the control curve, rather, they depend on the slope factors in the separate and common pathways. The following specific predictions are made: (1) when the common pathway is steep, curves undergo potentiation and flattening; (2) when the common pathway is flat, curves undergo right-shift and steepening; (3) when the common pathway is hyperbolic, curves undergo right-shift, with no slope change; (4) when the slope depends on the separate pathways, curves only undergo right-shift with no change in slope. The model provides a sound basis for classifying agonist interactions and for detecting additional, synergistic or antagonistic properties. This analysisin dicatest hat methodsb asedo n dose-additivity or independencea re less reliable for these purposes. The model provides a practical test, based on slope changes, to detect and quantify additional properties",
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- "timestamp_created": "2025-01-30 14:06:03.050209+00:00",
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Its a mechanistic model explaining the impact of p53 on apoptosis decision. This model represents schema 2 of manuscript.
This model is based on the publication:\"CAR T cell therapy in B-cell acute lymphoblastic leukaemia: Insights from mathematical models\".Odelaisy Le\u00f3n-Triana, Soukaina Sabir, Gabriel F. Calvo, Juan Belmonte-Beitia, Salvador Chuli\u00e1n, \u00c1lvaro Mart\u00ednez-Rubio, Mar\u00eda Rosa, Antonio P\u00e9rez-Mart\u00ednez, Manuel Ramirez-Orellana, V\u00edctor M. P\u00e9rez-Garc\u00edadoi: 10.1016/j.cnsns.2020.105570 Comment:This model is based on equations (4a)-(4c).Abstract: Immunotherapies use components of the patient immune system to selectively target can- cer cells. The use of chimeric antigenic receptor (CAR) T cells to treat B-cell malignancies \u2013leukaemias and lymphomas\u2013is one of the most successful examples, with many patients experiencing long-lasting full responses to this therapy. This treatment works by extract- ing the patient\u2019s T cells and transducing them with the CAR, enabling them to recognize and target cells carrying the antigen CD19 + , which is expressed in these haematological cancers. Here we put forward a mathematical model describing the time response of leukaemias to the injection of CAR T cells. The model accounts for mature and progenitor B-cells, leukaemic cells, CAR T cells and side effects by including the main biological processes involved. The model explains the early post-injection dynamics of the different compart- ments and the fact that the number of CAR T cells injected does not critically affect the treatment outcome. An explicit formula is found that gives the maximum CAR T cell ex- pansion in vivo and the severity of side effects. Our mathematical model captures other known features of the response to this immunotherapy. It also predicts that CD19 + cancer relapses could be the result of competition between leukaemic and CAR T cells, analogous to predator-prey dynamics. We discuss this in the light of the available evidence and the possibility of controlling relapses by early re-challenging of the leukaemia cells with stored CAR T cells.
This model is based on the publication:\"CAR T cell therapy in B-cell acute lymphoblastic leukaemia: Insights from mathematical models\".Odelaisy Le\u00f3n-Triana, Soukaina Sabir, Gabriel F. Calvo, Juan Belmonte-Beitia, Salvador Chuli\u00e1n, \u00c1lvaro Mart\u00ednez-Rubio, Mar\u00eda Rosa, Antonio P\u00e9rez-Mart\u00ednez, Manuel Ramirez-Orellana, V\u00edctor M. P\u00e9rez-Garc\u00edadoi: 10.1016/j.cnsns.2020.105570 Comment:This model is based on equations (3a)-(3c) from the paper.Abstract: Immunotherapies use components of the patient immune system to selectively target can- cer cells. The use of chimeric antigenic receptor (CAR) T cells to treat B-cell malignancies \u2013leukaemias and lymphomas\u2013is one of the most successful examples, with many patients experiencing long-lasting full responses to this therapy. This treatment works by extract- ing the patient\u2019s T cells and transducing them with the CAR, enabling them to recognize and target cells carrying the antigen CD19 + , which is expressed in these haematological cancers. Here we put forward a mathematical model describing the time response of leukaemias to the injection of CAR T cells. The model accounts for mature and progenitor B-cells, leukaemic cells, CAR T cells and side effects by including the main biological processes involved. The model explains the early post-injection dynamics of the different compart- ments and the fact that the number of CAR T cells injected does not critically affect the treatment outcome. An explicit formula is found that gives the maximum CAR T cell ex- pansion in vivo and the severity of side effects. Our mathematical model captures other known features of the response to this immunotherapy. It also predicts that CD19 + cancer relapses could be the result of competition between leukaemic and CAR T cells, analogous to predator-prey dynamics. We discuss this in the light of the available evidence and the possibility of controlling relapses by early re-challenging of the leukaemia cells with stored CAR T cells.
This model of the use of chimeric antigen receptor (CAR)-T cell therapy in the treatment of solid tumours is described in the article:\"Dual-Target CAR-Ts with On- and Off-Tumour Activity May Override Immune Suppression in Solid Cancers: A Mathematical Proof of Concept\"Odelaisy Le\u00f3n-Triana, Antonio P\u00e9rez-Mart\u00ednez, Manuel Ram\u00edrez-Orellana and V\u00edctor M. P\u00e9rez-Garc\u00edaCancers 2021, 13, 703.; doi: 10.3390/cancers13040703Comment:This is the first mathematical model, derived from equations 1 and 2, used in the paper.Reproduction of Fig. 5a was achieved by setting alpha_1 = 0.04, different to the value quoted in the article caption for Fig. 5.Abstract:Chimeric antigen receptor (CAR)-T cell-based therapies have achieved substantial success against B-cell malignancies, which has led to a growing scientific and clinical interest in extending their use to solid cancers. However, results for solid tumours have been limited up to now, in part due to the immunosuppressive tumour microenvironment, which is able to inactivate CAR-T cell clones. In this paper we put forward a mathematical model describing the competition of CAR-T and tumour cells, taking into account their immunosuppressive capacity. Using the mathematical model, we show that the use of large numbers of CAR-T cells targetting the solid tumour antigens could overcome the immunosuppressive potential of cancer. To achieve such high levels of CAR-T cells we propose, and study computationally, the manufacture and injection of CAR-T cells targetting two antigens: CD19 and a tumour-associated antigen. We study in silico the resulting dynamics of the disease after the injection of this product and find that the expansion of the CAR-T cell population in the blood and lymphopoietic organs could lead to the massive production of an army of CAR-T cells targetting the solid tumour, and potentially overcoming its immune suppression capabilities. This strategy could benefit from the combination with PD-1 inhibitors and low tumour loads. Our computational results provide theoretical support for the treatment of different types of solid tumours using T cells engineered with combination treatments of dual CARs with on- and off-tumour activity and anti-PD-1 drugs after completion of classical cytoreductive treatments.
This model of the use of chimeric antigen receptor (CAR)-T cell therapy in the treatment of solid tumours is described in the article:\"Dual-Target CAR-Ts with On- and Off-Tumour Activity May Override Immune Suppression in Solid Cancers: A Mathematical Proof of Concept\"Odelaisy Le\u00f3n-Triana, Antonio P\u00e9rez-Mart\u00ednez, Manuel Ram\u00edrez-Orellana and V\u00edctor M. P\u00e9rez-Garc\u00edaCancers 2021, 13, 703.; doi: 10.3390/cancers13040703Comment:This is the second mathematical model, derived from equations 3 to 6, used in the paper.Reproduction of Figure 5b was achieved by setting alpha_1 = 0.183, in substitution for alpha_1 = 0.2 as quoted in the article.Abstract:Chimeric antigen receptor (CAR)-T cell-based therapies have achieved substantial success against B-cell malignancies, which has led to a growing scientific and clinical interest in extending their use to solid cancers. However, results for solid tumours have been limited up to now, in part due to the immunosuppressive tumour microenvironment, which is able to inactivate CAR-T cell clones. In this paper we put forward a mathematical model describing the competition of CAR-T and tumour cells, taking into account their immunosuppressive capacity. Using the mathematical model, we show that the use of large numbers of CAR-T cells targetting the solid tumour antigens could overcome the immunosuppressive potential of cancer. To achieve such high levels of CAR-T cells we propose, and study computationally, the manufacture and injection of CAR-T cells targetting two antigens: CD19 and a tumour-associated antigen. We study in silico the resulting dynamics of the disease after the injection of this product and find that the expansion of the CAR-T cell population in the blood and lymphopoietic organs could lead to the massive production of an army of CAR-T cells targetting the solid tumour, and potentially overcoming its immune suppression capabilities. This strategy could benefit from the combination with PD-1 inhibitors and low tumour loads. Our computational results provide theoretical support for the treatment of different types of solid tumours using T cells engineered with combination treatments of dual CARs with on- and off-tumour activity and anti-PD-1 drugs after completion of classical cytoreductive treatments.
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- "name": "Jarrah2014 - mathematical model of the immune response in muscle degeneration and subsequent regeneration in Duchenne muscular dystrophy in mdx mice",
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- "summary": "Duchenne muscular dystrophy (DMD) is a genetic disease that results in the death of affected boys by early adulthood.The genetic defect responsible for DMD has been known for over 25 years, yet at present there is neither cure nor effective treatment for DMD. During early disease onset, the mdx mouse has been validated as an animal model for DMD and use of this model has led to valuable but incomplete insights into the disease process. For example, immune cells are thought to be responsible for a significant portion of muscle cell death in the mdx mouse; however, the role and time course of the immune response in the dystrophic process have not been well described. In this paper we constructed a simple mathematical model to investigate the role of the immune response in muscle degeneration and subsequent regeneration in the mdx mouse model of Duchenne muscular dystrophy. Our model suggests that the immune response contributes substantially to the muscle degeneration and regeneration processes. Furthermore, the analysis of the model predicts that the immune system response oscillates throughout the life of the mice, and the damaged fibers are never completely cleared.",
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This model is based on the publication:\"Mathematical Modelling of Alternative Pathway of Complement System\".Suruchi Bakshi, Fraser Cunningham, Eva-Maria Nichols, Marta Biedzka-Sarek, Jessica Neisen, Sebastien Petit-Frere, Christina Bessant, Loveleena Bansal, Lambertus A Peletier, Stefano Zamuner, Piet H van der GraafDOI: 10.1007/s11538-020-00708-zComment:This model is based on the truncated minimal model equations (Eq. B.1) from the manuscript, which simulate depletion of factor H.Abstract:The complement system (CS) is an integral part of innate immunity and can be activated via three different pathways. The alternative pathway (AP) has a central role in the function of the CS. The AP of complement system is implicated in several human disease pathologies. In the absence of triggers, the AP exists in a time-invariant resting state (physiological steady state). It is capable of rapid, potent and transient activation response upon challenge with a trigger. Previous models of AP have focused on the activation response. In order to understand the molecular machinery necessary for AP activation and regulation of a physiological steady state, we built parsimonious AP models using experimentally supported kinetic parameters. The models further allowed us to test quantitative roles played by negative and positive regulators of the pathway in order to test hypotheses regarding their mechanisms of action, thus providing more insight into the complex regulation of AP.
This model is based on the publication:\"Mathematical Modelling of Alternative Pathway of Complement System\".Suruchi Bakshi, Fraser Cunningham, Eva-Maria Nichols, Marta Biedzka-Sarek, Jessica Neisen, Sebastien Petit-Frere, Christina Bessant, Loveleena Bansal, Lambertus A Peletier, Stefano Zamuner, Piet H van der GraafDOI: 10.1007/s11538-020-00708-zComment:This model is based on the truncated minimal model equations (Eq. B.1) from the manuscript, which simulate depletion of factor H.Abstract:The complement system (CS) is an integral part of innate immunity and can be activated via three different pathways. The alternative pathway (AP) has a central role in the function of the CS. The AP of complement system is implicated in several human disease pathologies. In the absence of triggers, the AP exists in a time-invariant resting state (physiological steady state). It is capable of rapid, potent and transient activation response upon challenge with a trigger. Previous models of AP have focused on the activation response. In order to understand the molecular machinery necessary for AP activation and regulation of a physiological steady state, we built parsimonious AP models using experimentally supported kinetic parameters. The models further allowed us to test quantitative roles played by negative and positive regulators of the pathway in order to test hypotheses regarding their mechanisms of action, thus providing more insight into the complex regulation of AP.
This model is based on the publication:\"Mathematical Modelling of Alternative Pathway of Complement System\".Suruchi Bakshi, Fraser Cunningham, Eva-Maria Nichols, Marta Biedzka-Sarek, Jessica Neisen, Sebastien Petit-Frere, Christina Bessant, Loveleena Bansal, Lambertus A Peletier, Stefano Zamuner, Piet H van der GraafDOI: 10.1007/s11538-020-00708-zComment:Correction to the original manuscript is accessible hereModel schematics in Figure 3 and parameter d4 were corrected.Abstract:The complement system (CS) is an integral part of innate immunity and can be activated via three different pathways. The alternative pathway (AP) has a central role in the function of the CS. The AP of complement system is implicated in several human disease pathologies. In the absence of triggers, the AP exists in a time-invariant resting state (physiological steady state). It is capable of rapid, potent and transient activation response upon challenge with a trigger. Previous models of AP have focused on the activation response. In order to understand the molecular machinery necessary for AP activation and regulation -of a physiological steady state, we built parsimonious AP models using experimentally supported kinetic parameters. The models further allowed us to test quantitative roles played by negative and positive regulators of the pathway in order to test hypotheses regarding their mechanisms of action, thus providing more insight into the complex regulation of AP.
This ordinary differential equation model is described in the following article:\"Autocrine and paracrine interferon signalling as \u2018ring vaccination\u2019 and \u2018contact tracing\u2019 strategies to suppress virus infection in a host\"G. Michael Lavigne, Hayley Russell, Barbara Sherry and Ruian KeDOI: 10.1098/rspb.2020.3002Comment:This model is based on the ordinary differential equations of the non-spatial model of well-mixed viral infection stated in the manuscript (Eq. 2.1 in the article).Abstract:The innate immune response, particularly the interferon response, represents a first line of defence against viral infections. The interferon molecules produced from infected cells act through autocrine and paracrine signalling to turn host cells into an antiviral state. Although the molecular mechanisms of IFN signalling have been well characterized, how the interferon response collectively contribute to the regulation of host cells to stop or suppress viral infection during early infection remain unclear. Here, we use mathematical models to delineate the roles of the autocrine and the paracrine signalling, and show that their impacts on viral spread are dependent on how infection proceeds. In particular, we found that when infection is well-mixed, the paracrine signalling is not as effective; by contrast, when infection spreads in a spatial manner, a likely scenario during initial infection in tissue, the paracrine signalling can impede the spread of infection by decreasing the number of susceptible cells close to the site of infection. Furthermore, we argue that the interferon response can be seen as a parallel to population-level epidemic prevention strategies such as \u2018contact tracing\u2019 or \u2018ring vaccination\u2019. Thus, our results here may have implications for the outbreak control at the population scale more broadly.
This ordinary differential equation model simulating the mechanisms that govern cancer-immune dynamics and their role in tumor responses to immunotherapy is described by the publication:Creemers JHA, Lesterhuis WJ, Mehra N, et al.\"A tipping point in cancer-immune dynamics leads to divergent immunotherapy responses and hampers biomarker discovery.\"Journal for ImmunoTherapy of Cancer 2021;9:e002032.doi:10.1136/jitc-2020-002032Comment:Simulation parameters in supplementary table 1 mismatch with figure 1 in manuscript. Therefore, to clarify, the following parameter values were used:Reproduction of Fig. 1(C), xi = 0.0005Reproduction of Fig. 1(D), xi = 0.00025Abstract:Background: Predicting treatment response or survival of cancer patients remains challenging in immuno-oncology. Efforts to overcome these challenges focus, among others, on the discovery of new biomarkers. Despite advances in cellular and molecular approaches, only a limited number of candidate biomarkers eventually enter clinical practice.Methods: A computational modeling approach based on ordinary differential equations was used to simulate the fundamental mechanisms that dictate tumor-immune dynamics and to investigate its implications on responses to immune checkpoint inhibition (ICI) and patient survival. Using in silico biomarker discovery trials, we revealed fundamental principles that explain the diverging success rates of biomarker discovery programs.Results: Our model shows that a tipping point\u2014a sharp state transition between immune control and immune evasion\u2014induces a strongly non-linear relationship between patient survival and both immunological and tumor-related parameters. In patients close to the tipping point, ICI therapy may lead to long-lasting survival benefits, whereas patients far from the tipping point may fail to benefit from these potent treatments.Conclusion: These findings have two important implications for clinical oncology. First, the apparent conundrum that ICI induces substantial benefits in some patients yet completely fails in others could be, to a large extent, explained by the presence of a tipping point. Second, predictive biomarkers for immunotherapy should ideally combine both immunological and tumor-related markers, as a patient\u2019s distance from the tipping point can typically not be reliably determined from solely one of these. The notion of a tipping point in cancer-immune dynamics helps to devise more accurate strategies to select appropriate treatments for patients with cancer.
This ordinary differential equation model of tumor cell growth, called the normal-tumor-immune-unhealthy diet model (NTIUNHDM), is described by the publication:Alharbi, S.A.; Rambely, A.S.\"A New ODE-Based Model for Tumor Cells and Immune System Competition\"Mathematics 2020, 8, 1285.doi:10.3390/math8081285Abstract:Changes in diet are heavily associated with high mortality rates in several types of cancer. In this paper, a new mathematical model of tumor cells growth is established to dynamically demonstrate the effects of abnormal cell progression on the cells affected by the tumor in terms of the immune system\u2019s functionality and normal cells\u2019 dynamic growth. This model is called the normal-tumor-immune-unhealthy diet model (NTIUNHDM) and governed by a system of ordinary differential equations. In the NTIUNHDM, there are three main populations normal cells, tumor cell and immune cells. The model is discussed analytically and numerically by utilizing a fourth-order Runge\u2013Kutta method. The dynamic behavior of the NTIUNHDM is discussed by analyzing the stability of the system at various equilibrium points and the Mathematica software is used to simulate the model. From analysis and simulation of the NTIUNHDM, it can be deduced that instability of the response stage, due to a weak immune system, is classified as one of the main reasons for the coexistence of abnormal cells and normal cells. Additionally, it is obvious that the NTIUNHDM has only one stable case when abnormal cells begin progressing into early stages of tumor cells such that the immune cells are generated once. Thus, early boosting of the immune system might contribute to reducing the risk of cancer.
This ordinary differential equation model of the cellular kinetics and pharmacodynamics of CAR-T cell therapy is described in the publication:Chaudhury, A., Zhu, X., Chu, L., Goliaei, A., June, C., Kearns, J. and Stein, A., 2020. Chimeric Antigen Receptor T Cell Therapies: A Review of Cellular Kinetic\u2010Pharmacodynamic Modeling Approaches. The Journal of Clinical Pharmacology, 60(S1).DOI: 10.1002/jcph.1691Comment:This model is based on equations 4-5 from the manuscript.Abstract:Chimeric antigen receptor T cell (CAR-T cell) therapies have shown significant efficacy in CD19+ leukemias and lymphomas. There remain many challenges and questions for improving next-generation CAR-T cell therapies, and mathematical modeling of CAR-T cells may play a role in supporting further development. In this review, we introduce a mathematical modeling taxonomy for a set of relatively simple cellular kinetic-pharmacodynamic models that describe the in vivo dynamics of CAR-T cell and their interactions with cancer cells. We then discuss potential extensions of this model to include target binding, tumor distribution, cytokine-release syndrome, immunophenotype differentiation, and genotypic heterogeneity.
This ordinary differential equation model of the cellular kinetics and pharmacodynamics of CAR-T cell therapy is described in the publication:Chaudhury, A., Zhu, X., Chu, L., Goliaei, A., June, C., Kearns, J. and Stein, A., 2020. Chimeric Antigen Receptor T Cell Therapies: A Review of Cellular Kinetic\u2010Pharmacodynamic Modeling Approaches. The Journal of Clinical Pharmacology, 60(S1).DOI: 10.1002/jcph.1691Comment:This model is based on equations 7-9 from the manuscript.Abstract:Chimeric antigen receptor T cell (CAR-T cell) therapies have shown significant efficacy in CD19+ leukemias and lymphomas. There remain many challenges and questions for improving next-generation CAR-T cell therapies, and mathematical modeling of CAR-T cells may play a role in supporting further development. In this review, we introduce a mathematical modeling taxonomy for a set of relatively simple cellular kinetic-pharmacodynamic models that describe the in vivo dynamics of CAR-T cell and their interactions with cancer cells. We then discuss potential extensions of this model to include target binding, tumor distribution, cytokine-release syndrome, immunophenotype differentiation, and genotypic heterogeneity.
This model is a supplementary material of a manuscript\"Diffusion driven metformin exchange transport rates between plasma and red blood cells\"by Janis Kurlovics, Darta Maija Zake, Linda Zaharenko, Kristaps Berzins, Janis Klovins, Egils StalidzansThe setting of the model correspond to Fig.2 for the case with a single coefficient for experimental values of average concentration curve. Parameter estimation can be executed using experimental data file \"average_exp_data.txt\".A=B if metformin concentration is 0 at t=0.
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- "name": "Zake2021 - PBPK model of metformin in mice: single dose peroral",
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- "summary": "This model is supplementary material of publication \"Physiologically based metformin pharmacokinetics model of mice and scale-up to humans for the estimation of concentrations in various tissues\"by Darta Maija Zake, Linda Zaharenko, Janis Kurlovics, Vitalijs Komasilovs, Janis Klovins and Egils Stalidzans.The model is pre-set for simulation of a single peroral dose.This is a whole-body model representing the pharmacokinetics of metformin in the mouse body. The model is in the form of ordinary differential equations and describes metformin concentration in 20 compartments. The model consists of 20 compartments (\u201cCompartments\u201d in COPASI model) describing various tissues or tissue sub-compartments and body fluids of metformin action (venous and arterial plasma, intestine, kidney, heart, fat, muscle, brain, lungs, stomach, liver, portal vein, remainder urine and feces). Body weight and the weight of all compartments is expressed as a volume in mL and for the calculations it is assumed that 1mL = 1g. The volumes of most compartments are calculated as a fraction of the body weight/volume, and the fractions are determined from literature data, the volumes of the stomach lumen and intestine lumen are fixed and do not change depending on the body weight. Similarly, the volume of external urine and feces is set to 1mL, but those are \u201cvolumeless\u201d compartments as they are only necessary for the calculation of metformin amount, not concentration. The model consists of 20 species (\u201cSpecies\u201d in COPASI model) that correspond to the metformin concentrations in the 20 compartments. The initial concentrations for all the species are 0 nmol/mL as metformin is not produced in the body and can only be detected after dose administration. The model consists of 33 reactions \u2013 they describe the transport processes of metformin in the body. The reactions include local parameters that are involved only in that particular reaction and global parameters \u2013 parameters that are used in multiple reactions or are calculated depending on another parameter e.g. scale-up coefficients. The model consists of 52 global quantities \u2013 parameters involved in multiple reactions or necessary for another parameter calculation:1.Parameters describing metformin dose \u2013 either in peroral (Metformin Dose in Lumen in mg) or intravenous (Metformin Dose in Plasma in mg). 2.Parameter describing mice physiology \u2013 body weight (in mL), cardiac output, blood flow to different compartments described as Q\u201dcompartment_name\u201d (for example Qliver describes blood flow to the liver compartment). Qgfr refers to the glomerular filtration rate. 3.Tissue:plasma partition coefficients (Ktp) that are necessary for the scale-up to humans.4.Parameters involved in the calculation of metformin amount in mg, these parameters are named mg\u201dCompartment_name\u201d (for example mgLiver describes the metformin amount in mg in the liver tissues). The time points of dose release are defined as \u201cevents\u201d in COPASI and can be changed as necessary. Time course simulations can be accessed through the section \u201cTime Course\u201d in this section the time duration and intervals can be changed. When time-course simulations are run three plots are created \u2013 Metformin amount in the 20 compartments, metformin concentrations in the compartments and reaction fluxes of all the reactions (see \u201cOutput Specifications\u201d -> \u201cPlots\u201d to activate or deactivate plots).",
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- "summary": "This model is supplementary material of publication \"Physiologically based metformin pharmacokinetics model of mice and scale-up to humans for the estimation of concentrations in various tissues\"by Darta Maija Zake, Linda Zaharenko, JanisKurlovics, Vitalijs Komasilovs, Egils Stalidzans and Janis Klovins.This is a whole-body model representing the pharmacokinetics of metformin in the human body. The model is in the form of Ordinary differential equations and describes metformin concentration in 21 compartments. The model consists of 21 compartments (\u201ccompartments\u201d in COPASI model) describing various tissues or tissue sub-compartments and body fluids of metformin action (venous and arterial plasma, red blood cells, intestine, kidney, heart, fat, muscle, brain, lungs, stomach, liver, portal vein, remainder, urine and feces). Body weight and the weight of all compartments is expressed as a volume in mL and for the calculations it is assumed that 1mL = 1g. The volumes of most compartments are calculated as a fraction of the body weight/volume, and the fractions are determined from literature data, the volumes of the stomach lumen and intestine lumen are fixed and do not change depending on the body weight. Similarly, the volume of external urine and feces is set to 1L, but those are \u201cvolumeless\u201d compartments as they are only necessary for the calculation of metformin amount, not concentration. The model consists of 21 species (\u201cspecies\u201d in COPASI model) that correspond to the metformin concentrations in the 21 compartments. The initial concentrations for all the species are 0 nmol/mL as metformin is not produced in the body and can only be detected after dose administration. The model consists of 35 reactions \u2013 they describe the transport processes of metformin in the body. The reactions include local parameters that are involved only in that particular reaction and global parameters \u2013 parameters that are used in multiple reactions or are calculated depending on another parameter e.g. scale-up coefficients. The model consists of 62 global quantities \u2013 parameters involved in multiple reactions or necessary for another parameter calculation:1.Parameters describing peroral metformin dose (Metformin Dose in Lumen in mg).2.Parameter describing human physiology \u2013 body weight (in mL), cardiac output, blood flow to different compartments described as Q\u201dcompartment_name\u201d (for example Qliver describes blood flow to the liver compartment). Qgfr refers to the glomerular filtration rate. 3.Parameters involved in the scale-up of the model\u2022Tissue:plasma partition coefficients (Ktp) that were estimated in the mice model.\u2022Kidney coefficient that is used for the scale-up of metformin elimination and is involved in the calculation of the rate parameters in the reactions \u201c13.4. KidneyPlasma -> KidneyTissue\u201d and \u201c13.5. KidneyTissue -> KidneyTubular\u201d. This parameter was determined using parameter estimation. \u2022Intestine coefficient that is involved in the calculation of the intestinal reaction rates of the reactions (03.2. IntestineLumen -> Enterocytes (PMAT OCT3), 03.3. Enterocytes -> IntestineVascular (OCT1), 03.4. IntestineLumen -> IntestineVascular (Saturable), 03.6. IntestineLumen -> Enterocytes (Diffusion) , 03.7. IntestineLumen -> IntestineVascular (Diffusion)). The parmaeters for these reactions are taken from Proctor publication and the intectine coefficient is used for the scale-up from the cell-culture to the human intestine. 4.Parameters involved in the calculation of metformin amount in mg, these parameters are named mg\u201dCompartment_name\u201d (for example mgLiver describes the metformin amount in mg in the liver tissues). The time points of dose release are defined as \u201cevents\u201d in COPASI and can be changed as necessary. The current model has 14 events and is set for a multiple-dose regimen for 7-day long twice-daily metformin administration. Time course simulations can be accessed through the section \u201cTime Course\u201d in this section the time duration and intervals can be changed. When time-course simulations are run three plots are created \u2013 Metformin amount in the 21 compartments, metformin concentrations in the compartments and reaction fluxes of all the reactions (see \u201cOutput Specifications\u201d -> \u201cPlots\u201d to activate or deactivate plots). The time-course also includes multiple \"Sliders\" that allow to easily change 3 parameters - \"Body Weight\", \"Cardiac Output\", \"Metformin Dose in Lumen in mg\".",
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- "name": "Zake2021 - PBPK model of metformin in humans, eight PO administrations with 12h interval",
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- "summary": "This model is supplementary material of publication \"Physiologically based metformin pharmacokinetics model of mice and scale-up to humans for the estimation of concentrations in various tissues\"by Darta Maija Zake, Linda Zaharenko, JanisKurlovics, Vitalijs Komasilovs, Egils Stalidzans and Janis Klovins.This is a whole-body model representing the pharmacokinetics of metformin in the human body. The model is in the form of Ordinary differential equations and describes metformin concentration in 21 compartments. The model consists of 21 compartments (\u201ccompartments\u201d in COPASI model) describing various tissues or tissue sub-compartments and body fluids of metformin action (venous and arterial plasma, red blood cells, intestine, kidney, heart, fat, muscle, brain, lungs, stomach, liver, portal vein, remainder, urine and feces). Body weight and the weight of all compartments is expressed as a volume in mL and for the calculations it is assumed that 1mL = 1g. The volumes of most compartments are calculated as a fraction of the body weight/volume, and the fractions are determined from literature data, the volumes of the stomach lumen and intestine lumen are fixed and do not change depending on the body weight. Similarly, the volume of external urine and feces is set to 1L, but those are \u201cvolumeless\u201d compartments as they are only necessary for the calculation of metformin amount, not concentration. The model consists of 21 species (\u201cspecies\u201d in COPASI model) that correspond to the metformin concentrations in the 21 compartments. The initial concentrations for all the species are 0 nmol/mL as metformin is not produced in the body and can only be detected after dose administration. The model consists of 35 reactions \u2013 they describe the transport processes of metformin in the body. The reactions include local parameters that are involved only in that particular reaction and global parameters \u2013 parameters that are used in multiple reactions or are calculated depending on another parameter e.g. scale-up coefficients. The model consists of 62 global quantities \u2013 parameters involved in multiple reactions or necessary for another parameter calculation:1.Parameters describing peroral metformin dose (Metformin Dose in Lumen in mg).2.Parameter describing human physiology \u2013 body weight (in mL), cardiac output, blood flow to different compartments described as Q\u201dcompartment_name\u201d (for example Qliver describes blood flow to the liver compartment). Qgfr refers to the glomerular filtration rate. 3.Parameters involved in the scale-up of the model\u2022Tissue:plasma partition coefficients (Ktp) that were estimated in the mice model.\u2022Kidney coefficient that is used for the scale-up of metformin elimination and is involved in the calculation of the rate parameters in the reactions \u201c13.4. KidneyPlasma -> KidneyTissue\u201d and \u201c13.5. KidneyTissue -> KidneyTubular\u201d. This parameter was determined using parameter estimation. \u2022Intestine coefficient that is involved in the calculation of the intestinal reaction rates of the reactions (03.2. IntestineLumen -> Enterocytes (PMAT OCT3), 03.3. Enterocytes -> IntestineVascular (OCT1), 03.4. IntestineLumen -> IntestineVascular (Saturable), 03.6. IntestineLumen -> Enterocytes (Diffusion) , 03.7. IntestineLumen -> IntestineVascular (Diffusion)). The parmaeters for these reactions are taken from Proctor publication and the intectine coefficient is used for the scale-up from the cell-culture to the human intestine. 4.Parameters involved in the calculation of metformin amount in mg, these parameters are named mg\u201dCompartment_name\u201d (for example mgLiver describes the metformin amount in mg in the liver tissues). The time points of dose release are defined as \u201cevents\u201d in COPASI and can be changed as necessary. The current model has 14 events and is set for a multiple-dose regimen for 7-day long twice-daily metformin administration. Time course simulations can be accessed through the section \u201cTime Course\u201d in this section the time duration and intervals can be changed. When time-course simulations are run three plots are created \u2013 Metformin amount in the 21 compartments, metformin concentrations in the compartments and reaction fluxes of all the reactions (see \u201cOutput Specifications\u201d -> \u201cPlots\u201d to activate or deactivate plots). The time-course also includes multiple \"Sliders\" that allow to easily change 3 parameters - \"Body Weight\", \"Cardiac Output\", \"Metformin Dose in Lumen in mg\".",
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This model of the immune system response to antigen presentation is based on the publication:Eduardo D.Sontag (2017) 'A Dynamic Model of Immune Responses to Antigen Presentation Predicts Different Regions of Tumor or Pathogen Elimination', Cell Systems, 4(2)DOI: 10.1016/j.cels.2016.12.003Comment:This model is based on the \"toy model\" as described by Equations 1A-1C from the manuscript and the system represented by Equation 2, which exhibits a type of incoherent feedforward loop (IFFL).Abstract:The immune system must discriminate between agents of disease and an organism\u2019s healthy cells. While the identification of an antigen as self/non-self is critically important, the dynamic features of antigen presentation may also determine the immune system\u2019s response. Here, we use a simple mathematical model of immune activation to explore the idea of antigen discrimination through dynamics. We propose that antigen presentation is coupled to two nodes, one regulatory and one effecting the immune response, through an incoherent feedforward loop and repressive feedback. This circuit would allow the immune system to effectively estimate the increase of antigens with respect to time, a key determinant of immune reactivity in vivo. Our model makes the prediction that tumors growing at specific rates evade the immune system despite the continuous presence of antigens indicating disease, a phenomenon closely related to clinically observed \u201ctwo-zone tolerance.\u201d Finally, we discuss a plausible biological instantiation of our circuit using combinations of regulatory and effector T cells.
This ordinary differential equation model of cancer virotherapy dynamics is described in the publication:Salma M. Al-Tuwairqi, Najwa O. Al-Johani, Eman A. Simbawa,\"Modeling dynamics of cancer radiovirotherapy\",Journal of Theoretical Biology, Volume 506, 2020, 110405, ISSN 0022-5193,DOI: 10.1016/j.jtbi.2020.110405.Comment:This model is represented by the equations in system (2) of the publication manuscript and describes the cancer-virus interactions for the Phase I virotherapy treatment.Abstract:Advances in genetic engineering have paved the way for a new therapy for cancer, which is called virotherapy. This treatment uses genetically engineered viruses which selectively infect, replicate in, and destroy cancer cells without damaging normal cells. Furthermore, current research and clinical trials have indicated that these viruses can be delivered as single agents or in combination with other therapies. In this paper, we propose systems of ordinary differential equations for modeling the dynamics of aggressive tumor growth under radiovirotherapy treatment. We divide the treatment period into two phases; consequently, we present two mathematical models. First, we formulate the virotherapy model as Phase I of the treatment. Then we extend the model to include radiotherapy in combination with virotherapy as Phase II of the treatment. Comprehensive qualitative analyses of both models are conducted. Furthermore, numerical experiments are performed in order to support the analytical results. An analysis of the parameters is also carried out to investigate their effects on the outcome of the treatment. Overall, the analytical results reveal that radiovirotherapy is more effective than, and a good alternative to, virotherapy, as it is capable of eradicating tumors completely.
This ordinary differential equation model of cancer radiovirotherapy dynamics is described in the publication:Salma M. Al-Tuwairqi, Najwa O. Al-Johani, Eman A. Simbawa,\"Modeling dynamics of cancer radiovirotherapy\",Journal of Theoretical Biology, Volume 506, 2020, 110405, ISSN 0022-5193,DOI: 10.1016/j.jtbi.2020.110405.Comment:This model is represented by the equations in system (14) of the publication manuscript and describes the cancer-virus interactions for the Phase II radiovirotherapy treatment.Abstract:Advances in genetic engineering have paved the way for a new therapy for cancer, which is called virotherapy. This treatment uses genetically engineered viruses which selectively infect, replicate in, and destroy cancer cells without damaging normal cells. Furthermore, current research and clinical trials have indicated that these viruses can be delivered as single agents or in combination with other therapies. In this paper, we propose systems of ordinary differential equations for modeling the dynamics of aggressive tumor growth under radiovirotherapy treatment. We divide the treatment period into two phases; consequently, we present two mathematical models. First, we formulate the virotherapy model as Phase I of the treatment. Then we extend the model to include radiotherapy in combination with virotherapy as Phase II of the treatment. Comprehensive qualitative analyses of both models are conducted. Furthermore, numerical experiments are performed in order to support the analytical results. An analysis of the parameters is also carried out to investigate their effects on the outcome of the treatment. Overall, the analytical results reveal that radiovirotherapy is more effective than, and a good alternative to, virotherapy, as it is capable of eradicating tumors completely.
This mathematical model of the role of the innate immune responses generated by macrophages in the context of anti-tumour oncolytic viral therapies is described in the publication:Nada Almuallem, Dumitru Trucu, Raluca Eftimie. \"Oncolytic viral therapies and the delicate balance between virus-macrophage-tumour interactions: A mathematical approach\". Mathematical Biosciences and Engineering, 2021, 18(1): 764-799.doi: 10.3934/mbe.2021041Comment:This model is represented by Equations 2.1a-f of the publication manuscript.Abstract:The success of oncolytic virotherapies depends on the tumour microenvironment, which contains a large number of infiltrating immune cells. In this theoretical study, we derive an ODE model to investigate the interactions between breast cancer tumour cells, an oncolytic virus (Vesicular Stomatitis Virus), and tumour-infiltrating macrophages with different phenotypes which can impact the dynamics of oncolytic viruses. The complexity of the model requires a combined analytical-numerical approach to understand the transient and asymptotic dynamics of this model. We use this model to propose new biological hypotheses regarding the impact on tumour elimination/relapse/persistence of: (i) different macrophage polarisation/re-polarisation rates; (ii) different infection rates of macrophages and tumour cells with the oncolytic virus; (iii) different viral burst sizes for macrophages and tumour cells. We show that increasing the rate at which the oncolytic virus infects the tumour cells can delay tumour relapse and even eliminate tumour. Increasing the rate at which the oncolytic virus particles infect the macrophages can trigger transitions between steady-state dynamics and oscillatory dynamics, but it does not lead to tumour elimination unless the tumour infection rate is also very large. Moreover, we confirm numerically that a large tumour-induced M1\u2192M2 polarisation leads to fast tumour growth and fast relapse (if the tumour was reduced before by a strong anti-tumour immune and viral response). The increase in viral-induced M2\u2192M1 re-polarisation reduces temporarily the tumour size, but does not lead to tumour elimination. Finally, we show numerically that the tumour size is more sensitive to the production of viruses by the infected macrophages.
This ordinary differential equation model, simulating the tumor-immune interactions involved in BCG immunotherapy to treat superficial bladder cancer, is described by the publication:Bunimovich-Mendrazitsky, S., Shochat, E., Stone, L. \"Mathematical Model of BCG Immunotherapy in Superficial Bladder Cancer\". Bull. Math. Biol. 69, 1847\u20131870 (2007). DOI: 10.1007/s11538-007-9195-zComment:This model is based on the system of ODEs given in Equation 4 of the publication manuscript.Reproduction of Figure 4 was achieved by setting p4 = 0.085.Abstract:Immunotherapy with Bacillus Calmette-Gu\u00e9rin (BCG)-an attenuated strain of Mycobacterium bovis (M. bovis) used for anti tuberculosis immunization-is a clinically established procedure for the treatment of superficial bladder cancer. However, the mode of action has not yet been fully elucidated, despite much extensive biological experience. The purpose of this paper is to develop a first mathematical model that describes tumor-immune interactions in the bladder as a result of BCG therapy. A mathematical analysis of the ODE model identifies multiple equilibrium points, their stability properties, and bifurcation points. Intriguing regimes of bistability are identified in which treatment has potential to result in a tumor-free equilibrium or a full-blown tumor depending only on initial conditions. Attention is given to estimating parameters and validating the model using published data taken from in vitro, mouse and human studies. The model makes clear that intensity of immunotherapy must be kept in limited bounds. While small treatment levels may fail to clear the tumor, a treatment that is too large can lead to an over-stimulated immune system having dangerous side effects for the patient.
This ordinary differential equation model of the role of the immune response in cancer virotherapy dynamics is described in the publication:Al-Tuwairqi, S.M., Al-Johani, N.O., Simbawa, E.A. \"Modeling dynamics of cancer virotherapy with immune response.\" Adv Differ Equ 2020, 438 (2020).DOI: 10.1186/s13662-020-02893-6Comment:This model is represented by the system described in Equation 2 of the publication manuscript.Abstract:Virotherapy is a therapeutic treatment for cancer. It uses genetically engineered viruses to selectively infect, replicate in, and destroy cancer cells without damaging normal cells. In this paper, we present a modified model to include, within the dynamics of virotherapy, the interaction between uninfected tumor cells and immune response. The model is analyzed qualitatively to produce five equilibrium points. One of these equilibriums demonstrates the effect observed in virotherapy, where the immune system demolishes infected cells as well as viruses. Moreover, the existence and stability of the equilibrium points are established under certain criteria. Numerical simulations are performed to display the agreement with the analytical results. Finally, parameter analysis is carried out to illustrate which parameters in the model affect the outcome of virotherapy.
This ordinary differential equation model is the Panetta-Kirschner model of tumor-immune interactions is described in the publication:Cappuccio A, Castiglione F, Piccoli B.\" Determination of the optimal therapeutic protocols in cancer immunotherapy.\" Math Biosci. 2007 Sep;209(1):1-13.doi: 10.1016/j.mbs.2007.02.009. Comment:The model represented in Equations 1-3 is the Panetta-Kirschner model and was used to reproduce Fig. 1.N.B.: Labelling of Fig. 1 graphs in manuscript mismatches with simulation results - CTL and tumor cell plots swapped.Abstract:Cancer immunotherapy aims at eliciting an immune system response against the tumor. However, it is often characterized by toxic side-effects. Limiting the tumor growth and, concurrently, avoiding the toxicity of a drug, is the problem of protocol design. We formulate this question as an optimization problem and derive an algorithm for its solution. Unlike the standard optimal control approach, the algorithm simulates impulse-like drug administrations. It relies on an exact computation of the gradient of the cost function with respect to any protocol by means of the variational equations, that can be solved in parallel with the system. In comparison with previous versions of this method [F. Castiglione, B. Piccoli, Optimal control in a model of dendritic cell transfection cancer immunotherapy, Bull. Math. Biol. 68 (2006) 255-274; B. Piccoli, F. Castiglione, Optimal vaccine scheduling in cancer immunotherapy, Physica A. 370 (2) (2007) 672-680], we optimize both the timing and the dosage of each administration and introduce a penalty term to avoid clustering of subsequent injections, a requirement consistent with the clinical practice. In addition, we implement the optimization scheme to simulate the case of multi-therapies. The procedure works for any ODE system describing the pharmacokinetics and pharmacodynamics of an arbitrary number of therapeutic agents. In this work, it was tested for a well known model of the tumor-immune system interaction [D. Kirschner, J.C. Panetta, Modeling immunotherapy of tumor-immune interaction, J. Math. Biol. 37 (1998) 235-252]. Exploring three immunotherapeutic scenarios (CTL therapy, IL-2 therapy and combined therapy), we display the stability and efficacy of the optimization method, obtaining protocols that are successful compromises between various clinical requirements.
This ordinary differential equation model of the interactions between tumor and normal cells is based on the publication:S. A. Alharbi and A. S. Rambely, \"Dynamic Simulation for Analyzing the Effects of the Intervention of Vitamins on Delaying the Growth of Tumor Cells,\" in IEEE Access, vol. 7, pp. 128816-128827, 2019doi: 10.1109/ACCESS.2019.2940060.Comment:This TNM model is described by the system of equations presented in (2), in the publication manuscript.Abstract:The natural sources of the vitamins, which come from a balanced diet (as recommended by the World Cancer Research Fund and the American Institute for Cancer Research) contribute to protecting the body from advancing progressive of cancer stages. Thus, in this study, we analyze the effect of the intervention of vitamins on delaying the growth of cancer cells based on the dynamics of a normal cell cycle when the tumor cells appear in a tissue as a resulting for progressing abnormal cells due to the weak response of the immune system. We developed a mathematical model, called tumor-normal-vitamins model (TNVM), which is governed by a system of ordinary differential equations and refers to two main populations normal cells and tumor cells. This model considers the intervention of vitamins as a moderating factor within thirty days. The models are discussed analytically and numerically by utilizing the Runge-Kutta method to simulate them. The results of the analysis and simulation of free model illustrate that the model will be stable if the tumor cells succeed in eliminating normal cells in the tissue. Whereas, the analysis and simulation of the TNVM showed a case of coexistence between normal cells and tumor cells occur if an individual consumes a regular rate of vitamins that have been simulated to be 87% per day from a natural food source. Even though the response of the immune system is weak, the daily consumption of enough vitamins can play an essential role in delaying the development of an early stage of cancer. This study contributes to the increasing awareness regarding a healthy diet to reduce the risk of some deadly diseases, especially cancer.
This ordinary differential equation model of the interactions between tumor and normal cells, in the presence of a regular rate of vitamins, is based on the publication:S. A. Alharbi and A. S. Rambely, \"Dynamic Simulation for Analyzing the Effects of the Intervention of Vitamins on Delaying the Growth of Tumor Cells,\" in IEEE Access, vol. 7, pp. 128816-128827, 2019doi: 10.1109/ACCESS.2019.2940060.Comment:This TNVM model is described by the system of equations presented in (10), in the publication manuscript.Reproduction of Fig. 11 was achieved by swapping the values of gamma and beta2 stated in the manuscript, i.e. gamma = 0.9817 and beta2 = 0.2291.Abstract:The natural sources of the vitamins, which come from a balanced diet (as recommended by the World Cancer Research Fund and the American Institute for Cancer Research) contribute to protecting the body from advancing progressive of cancer stages. Thus, in this study, we analyze the effect of the intervention of vitamins on delaying the growth of cancer cells based on the dynamics of a normal cell cycle when the tumor cells appear in a tissue as a resulting for progressing abnormal cells due to the weak response of the immune system. We developed a mathematical model, called tumor-normal-vitamins model (TNVM), which is governed by a system of ordinary differential equations and refers to two main populations normal cells and tumor cells. This model considers the intervention of vitamins as a moderating factor within thirty days. The models are discussed analytically and numerically by utilizing the Runge-Kutta method to simulate them. The results of the analysis and simulation of free model illustrate that the model will be stable if the tumor cells succeed in eliminating normal cells in the tissue. Whereas, the analysis and simulation of the TNVM showed a case of coexistence between normal cells and tumor cells occur if an individual consumes a regular rate of vitamins that have been simulated to be 87% per day from a natural food source. Even though the response of the immune system is weak, the daily consumption of enough vitamins can play an essential role in delaying the development of an early stage of cancer. This study contributes to the increasing awareness regarding a healthy diet to reduce the risk of some deadly diseases, especially cancer.
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- "summary": "This model is supplementary material of publication \"Physiologically based metformin pharmacokinetics model of mice and scale-up to humans for the estimation of concentrations in various tissues\"by Darta Maija Zake, Linda Zaharenko, JanisKurlovics, Vitalijs Komasilovs, Egils Stalidzans and Janis Klovins.This is a whole-body model representing the pharmacokinetics of metformin in the mouse body. The model is in the form of ordinary differential equations and describes metformin concentration in 20 compartments. The model consists of 20 compartments (\u201cCompartments\u201d in COPASI model) describing various tissues or tissue sub-compartments and body fluids of metformin action (venous and arterial plasma, intestine, kidney, heart, fat, muscle, brain, lungs, stomach, liver, portal vein, remainder urine and feces). Body weight and the weight of all compartments is expressed as a volume in mL and for the calculations it is assumed that 1mL = 1g. The volumes of most compartments are calculated as a fraction of the body weight/volume, and the fractions are determined from literature data, the volumes of the stomach lumen and intestine lumen are fixed and do not change depending on the body weight. Similarly, the volume of external urine and feces is set to 1mL, but those are \u201cvolumeless\u201d compartments as they are only necessary for the calculation of metformin amount, not concentration. The model consists of 20 species (\u201cSpecies\u201d in COPASI model) that correspond to the metformin concentrations in the 20 compartments. The initial concentrations for all the species are 0 nmol/mL as metformin is not produced in the body and can only be detected after dose administration. The model consists of 33 reactions \u2013 they describe the transport processes of metformin in the body. The reactions include local parameters that are involved only in that particular reaction and global parameters \u2013 parameters that are used in multiple reactions or are calculated depending on another parameter e.g. scale-up coefficients. The model consists of 52 global quantities \u2013 parameters involved in multiple reactions or necessary for another parameter calculation:1.Parameters describing metformin dose \u2013 either in peroral (Metformin Dose in Lumen in mg) or intravenous (Metformin Dose in Plasma in mg). 2.Parameter describing mice physiology \u2013 body weight (in mL), cardiac output, blood flow to different compartments described as Q\u201dcompartment_name\u201d (for example Qliver describes blood flow to the liver compartment). Qgfr refers to the glomerular filtration rate. 3.Tissue:plasma partition coefficients (Ktp) that are necessary for the scale-up to humans.4.Parameters involved in the calculation of metformin amount in mg, these parameters are named mg\u201dCompartment_name\u201d (for example mgLiver describes the metformin amount in mg in the liver tissues). The time points of dose release are defined as \u201cevents\u201d in COPASI and can be changed as necessary. Time course simulations can be accessed through the section \u201cTime Course\u201d in this section the time duration and intervals can be changed. When time-course simulations are run three plots are created \u2013 Metformin amount in the 20 compartments, metformin concentrations in the compartments and reaction fluxes of all the reactions (see \u201cOutput Specifications\u201d -> \u201cPlots\u201d to activate or deactivate plots). Also plotting the species result after 0.5 hours will reproduce the literature results.",
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This model is a supplementary material of a manuscript\"Diffusion driven metformin exchange transport rates between plasma and red blood cells\"by Janis Kurlovics, Darta Maija Zake, Linda Zaharenko, Kristaps Berzins, Janis Klovins, Egils StalidzansThe setting of the model correspond to Fig.2 for the case with a single coefficient for experimental values of average concentration curve. Parameter estimation can be executed using experimental data file \"average_exp_data.txt\".A=B if metformin concentration is 0 at t=0.
This mathematical model of T cell-tumour interactions considering the roles of T cell competition and stochastic extinction events in CAR T cell therapy is described by the publication:Kimmel GJ, Locke FL, Altrock PM. \"The roles of T cell competition and stochastic extinction events in chimeric antigen receptor T cell therapy.\" Proc Biol Sci. 2021 Mar 31;288(1947):20210229.doi: 10.1098/rspb.2021.0229Comment:Reproduction of Fig. 2(a) and (b) was simulated by using the fitted model parameter set given in Table 1 of the manuscript's Supplementary Material, however substituting the values of r_N and rho_C for those stated in Table 1 of the publication manuscript, i.e. r_N = 0.17 and rho_C = 0.0251.Abstract:Chimeric antigen receptor (CAR) T cell therapy is a remarkably effective immunotherapy that relies on in vivo expansion of engineered CAR T cells, after lymphodepletion (LD) by chemotherapy. The quantitative laws underlying this expansion and subsequent tumour eradication remain unknown. We develop a mathematical model of T cell\u2013tumour cell interactions and demonstrate that expansion can be explained by immune reconstitution dynamics after LD and competition among T cells. CAR T cells rapidly grow and engage tumour cells but experience an emerging growth rate disadvantage compared to normal T cells. Since tumour eradication is deterministically unstable in our model, we define cure as a stochastic event, which, even when likely, can occur at variable times. However, we show that variability in timing is largely determined by patient variability. While cure events impacted by these fluctuations occur early and are narrowly distributed, progression events occur late and are more widely distributed in time. We parameterized our model using population-level CAR T cell and tumour data over time and compare our predictions with progression-free survival rates. We find that therapy could be improved by optimizing the tumour-killing rate and the CAR T cells' ability to adapt, as quantified by their carrying capacity. Our tumour extinction model can be leveraged to examine why therapy works in some patients but not others, and to better understand the interplay of deterministic and stochastic effects on outcomes. For example, our model implies that LD before a second CAR T injection is necessary.
This ordinary differential equation model simulating the interactions between tumor and immune cells is detailed in the publication:Ahmed M. Makhlouf, Lamiaa El-Shennawy, Hesham A. Elkaranshawy, \"Mathematical Modelling for the Role of CD4+T Cells in Tumor-Immune Interactions\", Comput Math Methods Med. 2020 Feb 19;2020:7187602.doi: 10.1155/2020/7187602Comment:This no treatment model is described by equations 1-7 of the publication manuscript. Abstract:Mathematical modelling has been used to study tumor-immune cell interaction. Some models were proposed to examine the effect of circulating lymphocytes, natural killer cells, and CD8+T cells, but they neglected the role of CD4+T cells. Other models were constructed to study the role of CD4+T cells but did not consider the role of other immune cells. In this study, we propose a mathematical model, in the form of a system of nonlinear ordinary differential equations, that predicts the interaction between tumor cells and natural killer cells, CD4+T cells, CD8+T cells, and circulating lymphocytes with or without immunotherapy and/or chemotherapy. This system is stiff, and the Runge\u2013Kutta method failed to solve it. Consequently, the \u201cAdams predictor-corrector\u201d method is used. The results reveal that the patient\u2019s immune system can overcome small tumors; however, if the tumor is large, adoptive therapy with CD4+T cells can be an alternative to both CD8+T cell therapy and cytokines in some cases. Moreover, CD4+T cell therapy could replace chemotherapy depending upon tumor size. Even if a combination of chemotherapy and immunotherapy is necessary, using CD4+T cell therapy can better reduce the dose of the associated chemotherapy compared to using combined CD8+T cells and cytokine therapy. Stability analysis is performed for the studied patients. It has been found that all equilibrium points are unstable, and a condition for preventing tumor recurrence after treatment has been deduced. Finally, a bifurcation analysis is performed to study the effect of varying system parameters on the stability, and bifurcation points are specified. New equilibrium points are created or demolished at some bifurcation points, and stability is changed at some others. Hence, for systems turning to be stable, tumors can be eradicated without the possibility of recurrence. The proposed mathematical model provides a valuable tool for designing patients\u2019 treatment intervention strategies.
This mathematical model of the dynamics between tumor, virus and virus-specific CTL populations is described by the publication:Wodarz D. \"Viruses as antitumor weapons: defining conditions for tumor remission\". Cancer Res. 2001 Apr 15;61(8):3501-7.PMID: 11309314Comment:Reproduction of Fig. 3A was achieved by using the initial conditions infected_tumor_cells = 0.01, uninfected_tumor_cells = 0.0001, virus-specific_CTLs = 0, and with modified parameter sets.For Fig. 3A non-cytotoxic virus, k = 17 and beta= 0.5.For Fig. 3A cytotoxic virus, beta = 0.5.These simulation conditions yield plots similar to Fig. 3A in the manuscript.Abstract:Recent research has indicated that viruses specifically infecting tumor cells could be used as an alternative therapeutic approach in cancer patients. A particular example is the adenovirus ONYX-015, which has entered clinical trials in the context of head and neck cancer. Successful therapy crucially requires an understanding about how viral and host parameters influence tumor load. The interactions between the growing tumor, the replicating virus, and possible immune responses are multifactorial and nonlinear. Hence, a complete understanding of how virus and host characteristics influence the outcome of therapy requires mathematical models. In this study, such mathematical models are presented and analyzed. The study investigates three possible scenarios that could be relevant for therapy: (a) viral cytotoxicity alone kills tumor cells; (b) a virus-specific lytic CTL response contributes to killing of infected tumor cells; (c) the virus elicits immunostimulatory signals within the tumor that promote the development of tumor-specific CTL. The models precisely define conditions required for successful therapy. They identify the parameters that need to be measured and modulated to evaluate and refine the existing therapy regimes.
This model originates from the Cell Cycle Database . It is described in: Analysis of a generic model of eukaryotic cell-cycle regulation.Csik\u00e1sz-Nagy A , Battogtokh D , Chen KC , Nov\u00e1k B , Tyson JJ Biophys. J. [2006 Jun],90(12 ):4361-79 PMID: 16581849 Abstract: We propose a protein interaction network for the regulation of DNA synthesis and mitosis that emphasizes the universality of the regulatory system among eukaryotic cells. The idiosyncrasies of cell cycle regulation in particular organisms can be attributed, we claim, to specific settings of rate constants in the dynamic network of chemical reactions. The values of these rate constants are determined ultimately by the genetic makeup of an organism. To support these claims, we convert the reaction mechanism into a set of governing kinetic equations and provide parameter values (specific to budding yeast, fission yeast, frog eggs, and mammalian cells) that account for many curious features of cell cycle regulation in these organisms. Using one-parameter bifurcation diagrams, we show how overall cell growth drives progression through the cell cycle, how cell-size homeostasis can be achieved by two different strategies, and how mutations remodel bifurcation diagrams and create unusual cell-division phenotypes. The relation between gene dosage and phenotype can be summarized compactly in two-parameter bifurcation diagrams. Our approach provides a theoretical framework in which to understand both the universality and particularity of cell cycle regulation, and to construct, in modular fashion, increasingly complex models of the networks controlling cell growth and division.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
In summary, you are entitled to use this encoded model in absolutely any manner you deem suitable, verbatim, or with modification, alone or embedded it in a larger context, redistribute it, commercially or not, in a restricted way or not.
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- "name": "Smith&Moore2004 - The SIR model for the spread of HongKong Flu",
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- "summary": "This is the SIR model for disease spread of the Hong Kong flu in New York City in the late 1960's.",
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- "summary": "The mycobacterial cell wall is a distinctive thick layer that protects the tubercle bacillus from general antibiotics and the host\u2019s immune system. Mycolic acids, which are long-chain \u03b1-alkyl-\u03b2-hydroxy fatty acids, are the major constituents of this protective layer, and their synthesis has been shown to be critical for the survival of M. tuberculosis. This model captures the mycolic acid pathway in M. tuberculosis with 197 metabolites participating in 219 reactions catalysed by 28 proteins. The model helps in the rational identification of potential anti-tubercular drug targets.",
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- "name": "Collier1996 - Delta Notch intercellular signalling and lateral inhibition",
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ODE model describing how slight variations in Notch and Delta cellular concentrations, through lateral inhibition, lead to cells with different states of differentiation. Lateral inhibition is a process whereby a given cell adopting a given fate prevents its immediate neighbouring cells from doing likewise. Notch and Delta are interacting transmembrane proteins and according to this model, lateral inhibition is due to a process where the inhibited cells (where notch has been activated by Delta) loose their ability to inhibit other cells (by synthesizing Delta). This process creates a feedback loop where cells with more delta proteins on their surface inhibit their immediate neighbours and adopt a different cell fate than those neighbours.
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- "summary": "Siddhartha Jain. Kinetic model for designing a cancer therapy. Cancer Cell International 2, 1 (2002).A kinetic model has been developed to study cancer growth. Cancer growth has been considered as interaction between various independent but interacting compartments. The model considers cell growth and metastasis resulting in the formation of new tumor masses. Using certain representative parameter values, cell growth has been modeled in the absence and the presence of various cancer therapies. Based on this analysis, the critical parameters involved in cancer development have been identified. This model may thus be useful in studying and designing a cancer therapy using the data obtained from specific in vitro experiments.",
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- "name": "Alharbi2020 - Tumor and immune system competition",
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- "summary": "Sana Abdulkream Alharbi & Azmin Sham Rambely. A New ODE-Based Model for Tumor Cells and Immune System Competition. Mathematics 8, 8 (2020).Changes in diet are heavily associated with high mortality rates in several types of cancer. In this paper, a new mathematical model of tumor cells growth is established to dynamically demonstrate the effects of abnormal cell progression on the cells affected by the tumor in terms of the immune system\u2019s functionality and normal cells\u2019 dynamic growth. This model is called the normal-tumor-immune-unhealthy diet model (NTIUNHDM) and governed by a system of ordinary differential equations. In the NTIUNHDM, there are three main populations normal cells, tumor cell and immune cells. The model is discussed analytically and numerically by utilizing a fourth-order Runge\u2013Kutta method. The dynamic behavior of the NTIUNHDM is discussed by analyzing the stability of the system at various equilibrium points and the Mathematica software is used to simulate the model. From analysis and simulation of the NTIUNHDM, it can be deduced that instability of the response stage, due to a weak immune system, is classified as one of the main reasons for the coexistence of abnormal cells and normal cells. Additionally, it is obvious that the NTIUNHDM has only one stable case when abnormal cells begin progressing into early stages of tumor cells such that the immune cells are generated once. Thus, early boosting of the immune system might contribute to reducing the risk of cancer.",
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- "summary": "Ravindra Garde, Bashar Ibrahim & Stefan Schuster. Extending the minimal model of metabolic oscillations in Bacillus subtilis biofilms. Scientific Reports 10, 1 (2020).Biofilms are composed of microorganisms attached to a solid surface or floating on top of a liquid surface. They pose challenges in the field of medicine but can also have useful applications in industry. Regulation of biofilm growth is complex and still largely elusive. Oscillations are thought to be advantageous for biofilms to cope with nutrient starvation and chemical attacks. Recently, a minimal mathematical model has been employed to describe the oscillations in Bacillus subtilis biofilms. In this paper, we investigate four different modifications to that minimal model in order to better understand the oscillations in biofilms. Our first modification is towards making a gradient of metabolites from the center of the biofilm to the periphery. We find that it does not improve the model and is therefore, unnecessary. We then use realistic Michaelis-Menten kinetics to replace the highly simple mass-action kinetics for one of the reactions. Further, we use reversible reactions to mimic the diffusion in biofilms. As the final modification, we check the combined effect of using Michaelis-Menten kinetics and reversible reactions on the model behavior. We find that these two modifications alone or in combination improve the description of the biological scenario.",
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- "summary": "Here is an ode model for in vitro fibrin matrix polymerization reproducing interactions among fibrinogen, fibrin and other proteins involved in the homeostatic phase of wound healing.",
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- "name": "Jeon2018 - Enzyme clustering in Glucose metabolism",
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- "summary": "Miji Jeon, Hye-Won Kang & Songon An. A Mathematical Model for Enzyme Clustering in Glucose Metabolism. Scientific Reports 8, 1 (2018).We have recently demonstrated that the rate-limiting enzymes in human glucose metabolism organize into cytoplasmic clusters to form a multienzyme complex, the glucosome, in at least three different sizes. Quantitative high-content imaging data support a hypothesis that the glucosome clusters regulate the direction of glucose flux between energy metabolism and building block biosynthesis in a cluster size-dependent manner. However, direct measurement of their functional contributions to cellular metabolism at subcellular levels has remained challenging. In this work, we develop a mathematical model using a system of ordinary differential equations, in which the association of the rate-limiting enzymes into multienzyme complexes is included as an essential element. We then demonstrate that our mathematical model provides a quantitative principle to simulate glucose flux at both subcellular and population levels in human cancer cells. Lastly, we use the model to simulate 2-deoxyglucose-mediated alteration of glucose flux in a population level based on subcellular high-content imaging data. Collectively, we introduce a new mathematical model for human glucose metabolism, which promotes our understanding of functional roles of differently sized multienzyme complexes in both single-cell and population levels.",
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- "name": "Chulian2021 - feedback signalling in B lymphopoeisis",
- "repository_type": "biomodels",
- "summary": "Salvador Chuli\u00e1n, \u00c1lvaro Mart\u00ednez-Rubio, Anna Marciniak-Czochra, Thomas Stiehl, Cristina Bl\u00e1zquez Go\u00f1i, Juan Francisco Rodr\u00edguez Guti\u00e9rrez, Manuel Ram\u00edrez Orellana, Ana Castillo Robleda, V\u00edctor M. P\u00e9rez-Garc\u00eda & Mar\u00eda Rosa. Dynamical properties of feedback signalling in B lymphopoiesis: A mathematical modelling approach. Journal of Theoretical Biology 522 (2021).Haematopoiesis is the process of generation of blood cells. Lymphopoiesis generates lymphocytes, the cells in charge of the adaptive immune response. Disruptions of this process are associated with diseases like leukaemia, which is especially incident in children. The characteristics of self-regulation of this process make them suitable for a mathematical study.In this paper we develop mathematical models of lymphopoiesis using currently available data. We do this by drawing inspiration from existing structured models of cell lineage development and integrating them with paediatric bone marrow data, with special focus on regulatory mechanisms. A formal analysis of the models is carried out, giving steady states and their stability conditions. We use this analysis to obtain biologically relevant regions of the parameter space and to understand the dynamical behaviour of B-cell renovation. Finally, we use numerical simulations to obtain further insight into the influence of proliferation and maturation rates on the reconstitution of the cells in the B line. We conclude that a model including feedback regulation of cell proliferation represents a biologically plausible depiction for B-cell reconstitution in bone marrow. Research into haematological disorders could benefit from a precise dynamical description of B lymphopoiesis.",
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- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "3337": {
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- "content_types": "modeling",
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- "default_context": "4",
- "id": 3337,
- "name": "Nikolov2020 - p53-miR34 model",
- "repository_type": "biomodels",
- "summary": "Svetoslav Nikolov, Olaf Wolkenhauer, Julio Vera & Momchil Nenov. The role of cooperativity in a p53-miR34 dynamical mathematical model. Journal of Theoretical Biology 495 (2020).The objective of this study is to evaluate the role of cooperativity, captured by the Hill coefficient, in a minimal mathematical model describing the interactions between p53 and miR-34a. The model equations are analyzed for negative, none and normal cooperativity using a specific version of bifurcation theory and they are solved numerically. Special attention is paid to the sign of so-called first Lyapunov value. Interpretations of the results are given, both according to dynamic theory and in biological terms. In terms of cell signaling, we propose the hypothesis that when the outgoing signal of a system spends a physiologically significant amount of time outside of its equilibrium state, then the value of that signal can be sampled at any point along the trajectory towards that equilibrium and indeed, at multiple points. Coupled with non-linear behavior, such as that caused by cooperativity, this feature can account for a complex and varied response, which p53 is known for. From dynamical point of view, we found that when cooperativity is negative, the system has only one stable equilibrium point. In the absence of cooperativity, there is a single unstable equilibrium point with a critical boundary of stability. In the case with normal cooperativity, the system can have one, two, or three steady states with both, bi-stability and bi-instability occurring.",
- "tags": [
- {
- "id": 2936,
- "tag": "BioModels"
- },
- {
- "id": 4557,
- "tag": "BioModels:BIOMD0000001057"
- },
- {
- "id": 3002,
- "tag": "Homo sapiens"
- },
- {
- "id": 704,
- "tag": "SBML"
- },
- {
- "id": 4665,
- "tag": "Signal transduction by p53 class mediator"
- }
- ],
- "timestamp_created": "2025-01-30 14:45:13.811021+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000001057",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3338": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "4",
- "id": 3338,
- "name": "Novak2022 - Mitotic kinase oscillation",
- "repository_type": "biomodels",
- "summary": "Bela Novak & John J. Tyson. Mitotic kinase oscillation governs the latching of cell cycle switches. Current Biology 32, 12 (2022).In 1996, Kim Nasmyth1 proposed that the eukaryotic cell cycle is an alternating sequence of transitions from G1 to S-G2-M and back again. These two phases correlate to high activity of cyclin-dependent kinases (CDKs) that trigger S-G2-M events and CDK antagonists that stabilize G1 phase. We associated these \u201calternative phases\u201d with the coexistence of two stable steady states of the biochemical reactions among CDKs and their antagonists. Transitions between these steady states (G1-to-S and M-to-G1) are driven by \u201chelper\u201d proteins. The fact that the transitions are irreversible is guaranteed by a \u201clatching\u201d property of the molecular switches, as we have argued in previous publications. Here, we show that if the latch is broken, then the biochemical reactions can swing back-and-forth across the transitions; either G1-S-G1-S \u2026 (periodic DNA replication without mitosis or cell division) or M-(G1)-M-(G1) \u2026 (periodic Cdc14 release, without fully exiting mitosis). Using mathematical modeling of the molecular control circuit in budding yeast, we provide a fresh account of aberrant cell cycles in mutant strains: endoreplication in the clb1-5\u0394 strain and periodic release and resequestration of Cdc14 (an \u201cexit\u201d phosphatase) in the CLB2kd\u0394 strain.7,8 In our opinion, these \u201cendocycles\u201d are not autonomous oscillatory modules that must be entrained by the CDK oscillator but rather inadvertent and deleterious oscillations that are normally suppressed by the CDK latching-gate mechanism.",
- "tags": [
- {
- "id": 2936,
- "tag": "BioModels"
- },
- {
- "id": 4558,
- "tag": "BioModels:BIOMD0000001058"
- },
- {
- "id": 3002,
- "tag": "Homo sapiens"
- },
- {
- "id": 704,
- "tag": "SBML"
- }
- ],
- "timestamp_created": "2025-01-30 14:45:14.353365+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000001058",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3339": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "4",
- "id": 3339,
- "name": "Stucki2005 - caspase-3 metabolism",
- "repository_type": "biomodels",
- "summary": "J\u00f6rg W. Stucki & Hans-Uwe Simon. Mathematical modeling of the regulation of caspase-3 activation and degradation. Journal of Theoretical Biology 234, 1 (2005).Caspases are thought to be important players in the execution process of apoptosis. Inhibitors of apoptosis (IAPs) are able to block caspases and therefore apoptosis. The fact that a subgroup of the IAP family inhibits active caspases implies that not each caspase activation necessarily leads to apoptosis. In such a scenario, however, processed and enzymically active caspases should somehow be removed. Indeed, IAP\u2013caspase complexes covalently bind ubiquitin, resulting in degradation by the 26S proteasome. Following release from mitochondria, IAP antagonists (e.g. second mitochondrial activator of caspases (Smac)) inactivate IAPs. Moreover, although pro-apoptotic factors such as irradiation or anti-cancer drugs may release Smac from mitochondria in tumor cells, high cytoplasmic survivin and ML-IAP levels might be able to neutralize it and, consequently, IAPs would further be able to bind activated caspases. Here, we propose a simple mathematical model, describing the molecular interactions between Smac deactivators, Smac, IAPs, and caspase-3, including the requirements for both induction and prevention of apoptosis, respectively. In addition, we predict a novel mechanism of caspase-3 degradation that might be particularly relevant in long-living cells.",
- "tags": [
- {
- "id": 2936,
- "tag": "BioModels"
- },
- {
- "id": 4559,
- "tag": "BioModels:BIOMD0000001059"
- },
- {
- "id": 4141,
- "tag": "Mus"
- },
- {
- "id": 704,
- "tag": "SBML"
- }
- ],
- "timestamp_created": "2025-01-30 14:45:14.870844+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000001059",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3340": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "4",
- "id": 3340,
- "name": "Frank2021 - Macrophage polarization",
- "repository_type": "biomodels",
- "summary": "The model describes the mechanisms by which macrophages differentiate into a given phenotype. The model shows that both extracellular and intracellular signalling are both important for that process. More specifically, STAT1 activity favors macrophages polarization towards M1 phenotype and STAT6 activity favors macrophage polarization towards M2 phenotype. However, these polarizations are can be reversed by molecular signalling.",
- "tags": [
- {
- "id": 2936,
- "tag": "BioModels"
- },
- {
- "id": 4560,
- "tag": "BioModels:BIOMD0000001060"
- },
- {
- "id": 3002,
- "tag": "Homo sapiens"
- },
- {
- "id": 704,
- "tag": "SBML"
- }
- ],
- "timestamp_created": "2025-01-30 14:45:15.594471+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000001060",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3341": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "5",
- "id": 3341,
- "name": "Canto-Encalada2022-FBA of simultaneous degradation of ammonia and pollutants",
- "repository_type": "biomodels",
- "summary": "The ammonia-oxidizing bacterium Nitrosomonas europaea has been widely recognized as an important player in the nitrogen cycle as well as one of the most abundant members in microbial communities for the treatment of industrial or sewage wastewater. Its natural metabolic versatility and extraordinary ability to degrade environmental pollutants enable it to thrive under various harsh environmental conditions. This model of N. europaea (iGC535) is the most accurate metabolic model for a nitrifying organism to date, reaching an average prediction accuracy of over 90% under several growth conditions. The manually curated model can predict phenotypes under chemolithotrophic and chemolithoorganotrophic conditions while oxidating methane and wastewater pollutants. It is the first upload of the model.",
- "tags": [
- {
- "id": 2936,
- "tag": "BioModels"
- },
- {
- "id": 4561,
- "tag": "BioModels:BIOMD0000001061"
- },
- {
- "id": 4562,
- "tag": "Nitrosomonas europaea"
- },
- {
- "id": 704,
- "tag": "SBML"
- }
- ],
- "timestamp_created": "2025-01-30 14:45:16.105234+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000001061",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3342": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "9",
- "id": 3342,
- "name": "Kim2021 - Development of a Genome-Scale Metabolic Model and Phenome Analysis of the Probiotic Escherichia coli Strain Nissle 1917",
- "repository_type": "biomodels",
- "summary": "Escherichia coli Nissle 1917 (EcN) is an intestinal probiotic that is effective for the treatment of intestinal disorders, such as inflammatory bowel disease and ulcerative colitis. EcN is a representative Gram-negative probiotic in biomedical research and is an intensively studied probiotic. However, to date, its genome-wide metabolic network model has not been developed. Here, we developed a comprehensive and highly curated EcN metabolic model, referred to as iDK1463, based on genome comparison and phenome analysis. The model was improved and validated by comparing the simulation results with experimental results from phenotype microarray tests. iDK1463 comprises 1463 genes, 1313 unique metabolites, and 2984 metabolic reactions. Phenome data of EcN were compared with those of Escherichia coli intestinal commensal K-12 MG1655. iDK1463 was simulated to identify the genetic determinants responsible for the observed phenotypic differences between EcN and K-12. Further, the model was simulated for gene essentiality analysis and utilization of nutrient sources under anaerobic growth conditions. These analyses provided insights into the metabolic mechanisms by which EcN colonizes and persists in the gut. iDK1463 will contribute to the system-level understanding of the functional capacity of gut microbes and their interactions with microbiota and human hosts, as well as the development of live microbial therapeutics.",
- "tags": [
- {
- "id": 2936,
- "tag": "BioModels"
- },
- {
- "id": 4563,
- "tag": "BioModels:BIOMD0000001062"
- },
- {
- "id": 704,
- "tag": "SBML"
- }
- ],
- "timestamp_created": "2025-01-30 14:45:16.705215+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000001062",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3343": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "5",
- "id": 3343,
- "name": "Lu2019 - Genome scale metabolic model for Saccharomyces cerevisiae - yeastGEM8.5.0",
- "repository_type": "biomodels",
- "summary": "yeast-GEM: The consensus genome-scale metabolic model of Saccharomyces cerevisiae. Further curations of this model will be tracked in the GitHub repository:https://github.com/SysBioChalmers/yeast-GEM For you use yeast-GEM, please cite the yeast8 paper: Lu, H. et al. A consensus S. cerevisiae metabolic model Yeast8 and its ecosystem for comprehensively probing cellular metabolism. Nature Communications 10, 3586 (2019). https://doi.org/10.1038/s41467-019-11581-3. The FROG analysis was performed with the yeastGEM_rich_medium.mat, which is a rich medium setup.",
- "tags": [
- {
- "id": 2936,
- "tag": "BioModels"
- },
- {
- "id": 4564,
- "tag": "BioModels:BIOMD0000001063"
- },
- {
- "id": 704,
- "tag": "SBML"
- }
- ],
- "timestamp_created": "2025-01-30 14:45:17.221367+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000001063",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3344": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "9",
- "id": 3344,
- "name": "Kim2011 - the genome scale reconstruction of the Vibrio vulnificus metabolic network - VvuMBEL943",
- "repository_type": "biomodels",
- "summary": "
This is a model of the genome scale reconstruction of the Vibrio vulnificus metabolic network, VvuMBEL943, described in the article: Integrative genome-scale metabolic analysis of Vibrio vulnificus for drug targeting and discovery Hyun Uk Kim, Soo Young Kim, Haeyoung Jeong, Tae Yong Kim, Jae Jong Kim, Hyon E Choy, Kyu Yang Yi, Joon Haeng Rhee, and Sang Yup Lee. Molecular Systems Biology 7:460 Jan 2011 doi: 10.1038/msb.2010.115
Abstract: Although the genomes of many microbial pathogens have been studied to help identify effective drug targets and novel drugs, such efforts have not yet reached full fruition. In this study, we report a systems biological approach that efficiently utilizes genomic information for drug targeting and discovery, and apply this approach to the opportunistic pathogen Vibrio vulnificus CMCP6. First, we partially re-sequenced and fully re-annotated the V. vulnificus CMCP6 genome, and accordingly reconstructed its genome-scale metabolic network, VvuMBEL943. The validated network model was employed to systematically predict drug targets using the concept of metabolite essentiality, along with additional filtering criteria. Target genes encoding enzymes that interact with the five essential metabolites finally selected were experimentally validated. These five essential metabolites are critical to the survival of the cell, and hence were used to guide the cost-effective selection of chemical analogs, which were then screened for antimicrobial activity in a whole-cell assay. This approach is expected to help fill the existing gap between genomics and drug discovery.
This metabolic network model has been thoroughly validated by the authors. VvuMBEL943 is a stoichiometric model that contains the metabolic information of the microbial pathogen, Vibrio vulnificus CMCP6, at genome-scale. The SBML version was generated by Hyun Uk Kim using MetaFluxNet.
This model originates from BioModels Database: A Database of Annotated Published Models (http://www.ebi.ac.uk/biomodels/). It is copyright (c) 2005-2011 The BioModels.net Team. To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
In summary, you are entitled to use this encoded model in absolutely any manner you deem suitable, verbatim, or with modification, alone or embedded it in a larger context, redistribute it, commercially or not, in a restricted way or not..
",
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- "id": 2936,
- "tag": "BioModels"
- },
- {
- "id": 4565,
- "tag": "BioModels:BIOMD0000001064"
- },
- {
- "id": 704,
- "tag": "SBML"
- },
- {
- "id": 4566,
- "tag": "Vibrio vulnificus"
- }
- ],
- "timestamp_created": "2025-01-30 14:45:17.743999+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000001064",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3345": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "5",
- "id": 3345,
- "name": "vonDassow2000 - Segment Polarity Network model on 1x4 grid of cells",
- "repository_type": "biomodels",
- "summary": "This is the segment polarity network model described by von Dassow et al. (2000). It represents a toroidal hexagonal array of cells (1x4), where each cell can express various genes (winglessengrailed, hedgehog, cubitus interruptus, and patched) and where their protein products interact within a cell, and across neighboring cells.",
- "tags": [
- {
- "id": 2936,
- "tag": "BioModels"
- },
- {
- "id": 4567,
- "tag": "BioModels:BIOMD0000001065"
- },
- {
- "id": 4568,
- "tag": "Rhodococcus ruber"
- },
- {
- "id": 704,
- "tag": "SBML"
- }
- ],
- "timestamp_created": "2025-01-30 14:45:18.285749+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000001065",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3346": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "1",
- "id": 3346,
- "name": "Chowell2022 - Random Forest model to predict efficacy of immune checkpoint blockade across multiple cancer patient cohorts",
- "repository_type": "biomodels",
- "summary": "This is a Random Forest algorithm-based machine learning model called RF16, which incorporates a total of 16 genomic, molecular, demographic, and clinical features to predict the immunotherapy response for a patient. The model assigns a value of 0 for NonResponder and 1 for Responder. Please be aware that the column names in the GitHub code and the downloaded dataset from the publication may vary. Users are advised to make minor adjustments to either the code or the dataset to ensure compatibility. The curated version of the model has modified the column names in the training code to align with the dataset.GitHub repository: https://github.com/CCF-ChanLab/MSK-IMPACT-IO",
- "tags": [
- {
- "id": 2936,
- "tag": "BioModels"
- },
- {
- "id": 4569,
- "tag": "BioModels:BIOMD0000001066"
- },
- {
- "id": 4570,
- "tag": "ONNX"
- }
- ],
- "timestamp_created": "2025-01-30 14:45:18.787223+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000001066",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3347": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "5",
- "id": 3347,
- "name": "Deshpande2019 - Random Forest model to predict long non-coding RNAs from coding RNAs in Zea Mays plant transcriptomic data",
- "repository_type": "biomodels",
- "summary": "This is a Random Forest algorithm-based machine learning model to predict lncRNAs from coding mRNAs in plant transcriptomic data. The model assigns 1 for coding sequences and 2 for long non-coding sequences. The prediction is performed using a combination of Open Reading Frame (ORF) based, Sequence-based and Codon-bias features. Users need to download the curated ONNX model and also need to convert the sequences into feature matrix as mentioned in PLIT paper (Deshpande et al. 2019) to make predictions on sequences from Zea Mays sequence data.",
- "tags": [
- {
- "id": 2936,
- "tag": "BioModels"
- },
- {
- "id": 4571,
- "tag": "BioModels:BIOMD0000001067"
- },
- {
- "id": 4570,
- "tag": "ONNX"
- }
- ],
- "timestamp_created": "2025-01-30 14:45:19.345200+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000001067",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3348": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "2",
- "id": 3348,
- "name": "Nassar2022 - Metagenomics Classification Task for Scientific Literature Text",
- "repository_type": "biomodels",
- "summary": "This is a use case to show that, given any automatic metagenomic classification model for the documents, we can convert those to ONNX (Open Neural Network Exchange) format; it also consists of the Dockerfile that can be used to prepare a docker image. This conversion ensures interoperability and open access. The ONNX format utility can perform the following essential tasks: model conversion, inference, inspection, and optimization. Reference: 1) https://github.com/elixir-europe/biohackathon-projects-2022/tree/main/9 2) https://www.ebi.ac.uk/biomodels/search?query=Maaly+Nassar&domain=biomodels 3) https://gitlab.com/maaly7/emerald_metagenomics_annotations 4) This model is built upon the model of the following publication: Maaly Nassar, Alexander B Rogers, Francesco Talo', Santiago Sanchez, Zunaira Shafique, Robert D Finn, Johanna McEntyre, A machine learning framework for discovery and enrichment of metagenomics metadata from open access publications, GigaScience, Volume 11, 2022, giac077, https://doi.org/10.1093/gigascience/giac077",
- "tags": [
- {
- "id": 2936,
- "tag": "BioModels"
- },
- {
- "id": 4572,
- "tag": "BioModels:BIOMD0000001068"
- },
- {
- "id": 4570,
- "tag": "ONNX"
- }
- ],
- "timestamp_created": "2025-01-30 14:45:19.852980+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000001068",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "name": "Alam2019 - Machine learning approach of automatic identification and counting of blood cells",
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- "summary": "This model is used for automatic identification and counting of three types of blood cells: Red Blood Cells (RBC), White Blood Cells (WBC) and Platelet (Platelets) using the \u2018you only look once\u2019 (YOLO) object detection and classification algorithm with some additions to remove overannotation. The YOLO framework has been trained with a modified configuration BCCD Dataset of blood smear images to automatically identify and count red blood cells, white blood cells, and platelets. Postprocessing with k-nearest neighbor (KNN) and intersection over union (IOU) approach reduces issues with multiple annotation of platelets. The original code was extended to save the trained YoloV2 network state into the protobuf format. This is then used to generate the ONNX model, containing the weigths. Additional code was added to implement the inference step for image annotation based on the ONNX model, as well as the post-processing logic as used on the original model output. Dependencies have been documented explicitly using a conda environment.yml file to simplify reproducibility.Original GitHub repository: https://github.com/MahmudulAlam/Automatic-Identification-and-Counting-of-Blood-CellsGitHub repository: https://github.com/nilshoffmann/Automatic-Identification-and-Counting-of-Blood-Cells",
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- "id": 4573,
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- "timestamp_created": "2025-01-30 14:45:20.362087+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000001069",
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- "id": 3350,
- "name": "Kong2022 - Conditional Antibody Design as 3D Equivariant Graph Translation",
- "repository_type": "biomodels",
- "summary": "Multi-channel Equivariant Attention Network (MEAN) to co-design 1D sequences and 3D structures of CDRs. To be specific, MEAN formulates antibody design as a conditional graph translation problem by importing extra components including the target antigen and the light chain of the antibody. Then, MEAN resorts to E(3)-equivariant message passing along with a proposed attention mechanism to better capture the geometrical correlation between different components. Finally, it outputs both the 1D sequences and 3D structure via a multi-round progressive full-shot scheme, which enjoys more efficiency and precision against previous autoregressive approaches.",
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- "id": 4574,
- "tag": "BioModels:BIOMD0000001070"
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- "id": 4575,
- "tag": "UNKNOWN"
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- "timestamp_created": "2025-01-30 14:45:20.927615+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000001070",
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- "username": "osbadmin"
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- "id": 3351,
- "name": "Wang2022 - Scaffolding protein functional sites using deep learning",
- "repository_type": "biomodels",
- "summary": "Deep learning approaches for scaffolding such functional sites without needing to prespecify the fold or secondary structure of the scaffold. The first approach, \u201cconstrained hallucination,\u201d optimizes sequences such that their predicted structures contain the desired functional site. The second approach, \u201cinpainting,\u201d starts from the functional site and fills in additional sequence and structure to create a viable protein scaffold in a single forward pass through a specifically trained RoseTTAFold network.",
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- "tag": "BioModels:BIOMD0000001071"
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- "timestamp_created": "2025-01-30 14:45:21.453698+00:00",
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- "default_context": "8",
- "id": 3352,
- "name": "Phillips2013 - physiologically based modeling explaining Mammalian rest/activity patterns",
- "repository_type": "biomodels",
- "summary": "The model provides a framework for understanding rest/activity patterns effected by the circadian rhythm and relating them to underlying diverse phenotypes.",
- "tags": [
- {
- "id": 2936,
- "tag": "BioModels"
- },
- {
- "id": 4577,
- "tag": "BioModels:BIOMD0000001072"
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- {
- "id": 3114,
- "tag": "Mammalia"
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- "id": 704,
- "tag": "SBML"
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- "timestamp_created": "2025-01-30 14:45:21.979196+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000001072",
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- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
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- "id": 3353,
- "name": "Patterson2022 - Tumour mutation data driven Random Forest model to predict immune checkpoint inhibitor therapy benefit in metastatic melanoma",
- "repository_type": "biomodels",
- "summary": "A Random Forest model is developed to incorporate tumor mutation data within the context of the biological process known as leukocyte proliferation regulation. This model aims to predict a patient's response to anti-PD1 treatment.The authors conducted experiments using four different types of classifiers: Random Forest, Gradient Boosting, Feed Forward Neural Network, and Long Short-Term Memory (LSTM) recurrent neural network. Among these classifiers, the Random Forest algorithm yielded the best predictive performance when modeling gene mutation data associated with the 'leukocyte proliferation regulation' biological process. Hence, this curated version of the model focuses on the Random Forest model trained specifically on the 'Leukocyte Proliferation Regulation' process.In this model, a value of '0' is assigned to NonResponders, while a value of '1' is assigned to Responders. Please note that to obtain predictions, users should provide mutation data containing only the genes corresponding to the 'GO_REGULATION_OF_LEUKOCYTE_PROLIFERATION' process keyword, as specified in the 'GO_test_genes_dict_intersection' dictionary.",
- "tags": [
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- "id": 4578,
- "tag": "BioModels:BIOMD0000001073"
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- "tag": "ONNX"
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- "timestamp_created": "2025-01-30 14:45:22.484999+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000001073",
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- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
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- "name": "Liu2023 - Predicting the efficacy of immune checkpoint inhibitors monotherapy in advanced non-small cell lung cancer: a machine learning method based on multidimensional data",
- "repository_type": "biomodels",
- "summary": "Immunotherapy has improved the prognosis of patients with advanced non-small cell lungcancer (NSCLC), but only a small subset of patients achieved clinical benefit. The purpose of our study was to integrate multidimensional data using a machine learning method to predict the therapeutic efficacy of immune checkpoint inhibitors (ICIs) monotherapy in patients with advanced NSCLC.The authors retrospectively enrolled 112 patients with stage IIIB-IV NSCLC receiving ICIs monotherapy. The random forest (RF) algorithm was used to establish efficacy prediction models based on five different input datasets, including precontrast computed tomography (CT) radiomic data, postcontrast CT radiomic data, combination of the two CT radiomic data, clinical data, and a combination of radiomic and clinical data. The 5-fold cross-validation was used to train and test the random forest classifier. The performance of the models was assessed according to the area under the curve (AUC) in the receiver operating characteristic (ROC) curve. Among these models(RF MLP LR XGBoost), our reproduced onnx models have better performance, especially for random forest. The response variable with a value (1/0) indicates the (efficacy/inefficacy) of PD-1/PD-L1 monotherapy in patients with advanced NSCLC",
- "tags": [
- {
- "id": 2936,
- "tag": "BioModels"
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- {
- "id": 4579,
- "tag": "BioModels:BIOMD0000001074"
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- "id": 4570,
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- "timestamp_created": "2025-01-30 14:45:23.023177+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000001074",
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- "last_name": "Admin",
- "username": "osbadmin"
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- "id": 3355,
- "name": "Sammut2022 - Multi-omic machine learning model to predict pathological complete response for breast cancer neoadjuvant therapy",
- "repository_type": "biomodels",
- "summary": "In this publication, researchers investigated the intricate relationship between breast cancers and their microenvironment, specifically focusing on predicting treatment responses using multi-omic machine learning model. They collected diverse data types including clinical, genomic, transcriptomic, and digital pathology profiles from pre-treatment biopsies of breast tumors. Leveraging this comprehensive multi-omic dataset, the team developed ensemble machine learning models using different algorithms (Logistic Regression, SVM and Random Forest). These predictive models identifies patients likely to achieve a pathological complete response (pCR) to therapy, showcasing their potential to enhance treatment selection. Please note that the authors also have an interactive dashboard to apply the fully-integrated NAT response model on new (or any desired) data. The user can find its link in their GitHub repository: https://github.com/micrisor/NAT-MLFor more information and clarification, please refer to the ReadMe_NAT-ML document in the files section.",
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- "tag": "BioModels:BIOMD0000001075"
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- "timestamp_created": "2025-01-30 14:45:23.548847+00:00",
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- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000001075",
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- "name": "L\u00f3pez-Cort\u00e9s2020 - Prediction of Breast Cancer (BC) proteins involved in cancer immunotherapy using molecular descriptors and Multi Layer Perceptron (MLP) neural network",
- "repository_type": "biomodels",
- "summary": "This study introduces a predictive classifier for breast cancer-related proteins, utilising a combination of protein sequence descriptors and machine learning techniques. The best-performing classifier is a Multi Layer Perceptron (artificial neural network) with 300 features, achieving an average Area Under the Receiver Operating Characteristics (AUROC) score of 0.984 through 3-fold cross-validation. Notably, the model identified top-ranked cancer immunotherapy proteins associated with breast cancer that should be studied for further biomarker discovery and therapeutic targeting.Please note that in this model, the output '0' means BC non-related protein and '1' means BC related protein. The original GitHub repository can be accessed at https://github.com/muntisa/neural-networks-for-breast-cancer-proteins",
- "tags": [
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- "id": 2936,
- "tag": "BioModels"
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- "id": 4581,
- "tag": "BioModels:BIOMD0000001076"
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- "timestamp_created": "2025-01-30 14:45:24.042593+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000001076",
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- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
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- "username": "osbadmin"
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- "id": 3357,
- "name": "Adlung2021 - Cell-to-cell variability in JAK2/STAT5 pathway",
- "repository_type": "biomodels",
- "summary": "
A mathematical model for cell-to-cell variability in JAK2/STAT5 pathway components and cytoplasmic volumes defines survival threshold in erythroid progenitor cells
",
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- "id": 4582,
- "tag": "BioModels:BIOMD0000001077"
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- "id": 3002,
- "tag": "Homo sapiens"
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- "timestamp_created": "2025-01-30 14:45:24.576569+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000001077",
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- "default_context": "4",
- "id": 3358,
- "name": "Hammaren-Geissen2022_PPToP_Model12",
- "repository_type": "biomodels",
- "summary": "The model encodes the general biological process of protein synthesis and post-translational modification (PTM, such as protein phosphorylation), viewed through the eyes of a specific, widely-used experimental method. Specifically, we model measurements of pulsed stable isotope labelling of amino acids in cell culture (pSILAC), which is a method often used to quantify protein turnover (i.e. the degradation of old and replacement with new) of proteins in a cell.",
- "tags": [
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- "id": 2936,
- "tag": "BioModels"
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- "id": 4583,
- "tag": "BioModels:BIOMD0000001078"
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- "id": 3002,
- "tag": "Homo sapiens"
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- "id": 704,
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- "timestamp_created": "2025-01-30 14:45:25.124056+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000001078",
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- "last_name": "Admin",
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- "id": 3359,
- "name": "DeBoeck2021 - Modular approach to modeling the cell cycle, simple cell cycle model",
- "repository_type": "biomodels",
- "summary": "
Models the production and degradation of cyclin B that drives the early embryonic cell cycle.Cyclin B is degraded by APC/C. The activity of APC/C is modeled not through biochemical interactions, but through a 'functional response curve'. This can be ultrasensitive (with the parameter alpha=0). in this case the system does not oscillate. Importantly the response can be made bistable and the form of the bistability can be easily prescribed. With a bistable response, the system oscillates.The uploaded file corresponds to the model used for Figs.3H, I in the publication.
Model of the mammalian cell cycle as a chain of bistable switches. There are three bistable responses: response of E2F to Cyclin D, of Cdk1 to Cyclin B and of APC/C to Cdk1 activity. The model for the given parameters admits a complex limit cycle characterized by transitions through the bistable switches. The bistable responses are modeled directly using a functional motif, not through biochemical interactions. This modular approach allows to easily modify the properties of the bistable response curves. This version of the model correspond to Fig. 7 in the publication. We illustrated how, using this model, the system can be coupled to the circadian clock, by periodically modifying thresholds of one of the switches. We also illustrated how to implement the restriction point checkpoint using this model (those applications are not coded in the associated sbml file and can be seen in Fig. 8 of the publication). A related, simpler model that illustrates the bistable motif is MODEL2212060001
This model is according to the paper of A model for the dynamics of human weight cycling by A. Goldbeter 2006.The figure3 (A) and (B) have been reproduced by Copasi 4.0.19(development) and SBMLodeSolver.The writer of the paper did not specify any units for the metabolites, so the creator of the model did not define the units as well.Both Q and R are normalized to vary between 0 and 1.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
In summary, you are entitled to use this encoded model in absolutely any manner you deem suitable, verbatim, or with modification, alone or embedded it in a larger context, redistribute it, commercially or not, in a restricted way or not.
This is a model described in the article: Thermodynamically Consistent Model Calibration in Chemical Kinetics. Garrett Jenkinson and John Goutsias, BMC Systems Biology 2011 May 6;5(1):64.; PMID:21548948.
ABSTRACT: BACKGROUND: The dynamics of biochemical reaction systems are constrained by the fundamental laws of thermodynamics, which impose well-defined relationships among the reaction rate constants characterizing these systems. Constructing biochemical reaction systems from experimental observations often leads to parameter values that do not satisfy the necessary thermodynamic constraints. This can result in models that are not physically realizable and may lead to inaccurate, or even erroneous, descriptions of cellular function. RESULTS: We introduce a thermodynamically consistent model calibration (TCMC) method that can be effectively used to provide thermodynamically feasible values for the parameters of an open biochemical reaction system. The proposed method formulates the model calibration problem as a constrained optimization problem that takes thermodynamic constraints (and, if desired, additional non-thermodynamic constraints) into account. By calculating thermodynamically feasible values for the kinetic parameters of a well-known model of the EGF/ERK signaling cascade, we demonstrate the qualitative and quantitative significance of imposing thermodynamic constraints on these parameters and the effectiveness of our method for accomplishing this important task. MATLAB software, using the Systems Biology Toolbox 2.1, can be accessed from www.cis.jhu.edu/~goutsias/CSS lab/software.html. An SBML file containing the thermodynamically feasible EGF/ERK signaling cascade model can be found in the BioModels database. CONCLUSIONS: TCMC is a simple and flexible method for obtaining physically plausible values for the kinetic parameters of open biochemical reaction systems. It can be effectively used to recalculate a thermodynamically consistent set of parameter values for existing thermodynamically infeasible biochemical reaction models of cellular function as well as to estimate thermodynamically feasible values for the parameters of new models. Furthermore, TCMC can provide dimensionality reduction, better estimation performance, and lower computational complexity, and can help to alleviate the problem of data overfitting.
This model is a thermodynamically feasible version of a previous modelin the BioModels database,BIOMD0000000019, described in Computational modeling of the dynamics of the MAP kinase cascade activated by surface and internalized EGF receptors. Schoeberl et al (2002), PMID:11923843. The only difference between the present model and the model listed under BIOMD0000000019 are the values of the parameters.
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- "id": 3014,
- "tag": "Epidermal growth factor receptor signaling pathway"
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- "id": 3015,
- "tag": "Signaling by EGFR"
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- "timestamp_created": "2025-05-07 14:17:33.632208+00:00",
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- "id": 3366,
- "name": "Vizan2013 - TGF pathway long term signaling",
- "repository_type": "biomodels",
- "summary": "Pedro Viz\u00e1n, Daniel S. J. Miller, Ilaria Gori, Debipriya Das, Bernhard Schmierer & Caroline S. Hill. Controlling long-term signaling: receptor dynamics determine attenuation and refractory behavior of the TGF-\u03b2 pathway. Science Signaling 6, 305 (2013).Understanding the complex dynamics of growth factor signaling requires both mechanistic and kinetic information. Although signaling dynamics have been studied for pathways downstream of receptor tyrosine kinases and G protein (heterotrimeric guanine nucleotide-binding protein)-coupled receptors, they have not been investigated for the transforming growth factor-\u03b2 (TGF-\u03b2) superfamily pathways. Using an integrative experimental and mathematical modeling approach, we dissected the dynamic behavior of the TGF-\u03b2 to Smad pathway, which is mediated by type I and type II receptor serine/threonine kinases, in response to acute, chronic, and repeated ligand stimulations. TGF-\u03b2 exposure produced a transient response that attenuated over time, resulting in desensitized cells that were refractory to further acute stimulation. This loss of signaling competence depended on ligand binding, but not on receptor activity, and was restored only after the ligand had been depleted. Furthermore, TGF-\u03b2 binding triggered the rapid depletion of signaling-competent receptors from the cell surface, with the type I and type II receptors exhibiting different degradation and trafficking kinetics. A computational model of TGF-\u03b2 signal transduction from the membrane to the nucleus that incorporates our experimental findings predicts that autocrine signaling, such as that associated with tumorigenesis, severely compromises the TGF-\u03b2 response, which we confirmed experimentally. Thus, we have shown that the long-term signaling behavior of the TGF-\u03b2 pathway is determined by receptor dynamics, does not require TGF-\u03b2-induced gene expression, and influences context-dependent responses in vivo.",
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- "tag": "SMAD protein signal transduction"
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- "tag": "Transforming growth factor beta receptor signaling pathway"
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- "timestamp_created": "2025-05-07 14:18:08.906419+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000000499",
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- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "id": 3367,
- "name": "Begitt2014 - STAT1 cooperative DNA binding - single GAS polymer model",
- "repository_type": "biomodels",
- "summary": "
Begitt2014 - STAT1 cooperative DNA binding - single GAS polymer model
The importance of STAT1-cooperative DNA binding in type 1 and type 2 interferon signalling has been studies using experimental and modelling approaches. The authors have developed two ODE models to describe STAT1 binding to short promoter regions of DNA, namely \"single GAS polymer model\" and \"double GAS polymer model\" considering binding to single or double GAS sites, respectively. The length of DNA in the single GAS model was three sites and four sites in double GAS model. This model correspond to the \"single GAS polymer model\".
Begitt A, Droescher M, Meyer T, Schmid CD, Baker M, Antunes F, Owen MR, Naumann R, Decker T, Vinkemeier U
Nat Immunol. 2014 Feb;15(2):168-76.
Abstract:
STAT1 is an indispensable component of a heterotrimer (ISGF3) and a STAT1 homodimer (GAF) that function as transcription regulators in type 1 and type 2 interferon signaling, respectively. To investigate the importance of STAT1-cooperative DNA binding, we generated gene-targeted mice expressing cooperativity-deficient STAT1 with alanine substituted for Phe77. Neither ISGF3 nor GAF bound DNA cooperatively in the STAT1F77A mouse strain, but type 1 and type 2 interferon responses were affected differently. Type 2 interferon-mediated transcription and antibacterial immunity essentially disappeared owing to defective promoter recruitment of GAF. In contrast, STAT1 recruitment to ISGF3 binding sites and type 1 interferon-dependent responses, including antiviral protection, remained intact. We conclude that STAT1 cooperativity is essential for its biological activity and underlies the cellular responses to type 2, but not type 1 interferon.
To the extent possible under law, all copyright and related orneighbouring rights to this encoded model have been dedicated to the publicdomain worldwide. Please refer to CC0 Public DomainDedication for more information.
This model was developed with the aim of constructing an equilibrium model of the pharmacokinetic behaviour of a drug exhibiting target-mediated drug disposition (TMDD). TMDD involves the inclusion of drug-target interactions within a pharmacokinetic description, something which is usually considered negligible and subsequently excluded. Two approaches were used, one of which involved a quasi-equilibrium method to describe the kinetics of TMDD.
FROG and miniFROG Reports for the organism Yersinia pestis. These models originate from BiGG Models Database: A Database of Genome-Scale Metabolic Models (http://bigg.ucsd.edu/). Copyright \u00a9 2019 The Regents of the University of California
FROG and miniFROG Reports for the organism Synechococcus elongatus PCC 7942. These models originate from BiGG Models Database: A Database of Genome-Scale Metabolic Models (http://bigg.ucsd.edu/). Copyright \u00a9 2019 The Regents of the University of California
",
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- "id": 4669,
- "tag": "BioModels:BIOMD0000001083"
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- "id": 4667,
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- "timestamp_created": "2025-05-07 14:31:08.062464+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000001083",
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- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "default_context": "5",
- "id": 3372,
- "name": "Mol2021 - P. thermoglucosidasius NCIMB 11955 (p_thermo)",
- "repository_type": "biomodels",
- "summary": "FROG and miniFROG reports are provided for p_thermo genome-scale metabolic model. p_thermo is the model for Parageobacillus thermoglucosidasius NCIMB 11955. An analysis of the metabolism and internal fluxes of P. thermoglucosidasius is done in this study and the model can be found in the Supplementary data of Mol et al, 2021.",
- "tags": [
- {
- "id": 2936,
- "tag": "BioModels"
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- {
- "id": 4670,
- "tag": "BioModels:BIOMD0000001084"
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- "id": 4667,
- "tag": "OMEX"
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- "timestamp_created": "2025-05-07 14:31:08.588348+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000001084",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "default_context": "3",
- "id": 3373,
- "name": "Norsigian2018 - A. baumannii (iCN718)",
- "repository_type": "biomodels",
- "summary": "
FROG and miniFROG Reports for the organism A. baumannii. The model (iCN718) originates from BiGG Models Database: A Database of Genome-Scale Metabolic Models (http://bigg.ucsd.edu/). Copyright \u00a9 2019 The Regents of the University of California
Liao YC, Huang TW, Chen FC, Charusanti P, Hong JS, Chang HY, Tsai SF, Palsson BO, Hsiung CA.
J. Bacteriol. 2011 Apr; 193(7): 1710-1717
Abstract:
Klebsiella pneumoniae is a Gram-negative bacterium of the family Enterobacteriaceae that possesses diverse metabolic capabilities: many strains are leading causes of hospital-acquired infections that are often refractory to multiple antibiotics, yet other strains are metabolically engineered and used for production of commercially valuable chemicals. To study its metabolism, we constructed a genome-scale metabolic model (iYL1228) for strain MGH 78578, experimentally determined its biomass composition, experimentally determined its ability to grow on a broad range of carbon, nitrogen, phosphorus and sulfur sources, and assessed the ability of the model to accurately simulate growth versus no growth on these substrates. The model contains 1,228 genes encoding 1,188 enzymes that catalyze 1,970 reactions and accurately simulates growth on 84% of the substrates tested. Furthermore, quantitative comparison of growth rates between the model and experimental data for nine of the substrates also showed good agreement. The genome-scale metabolic reconstruction for K. pneumoniae presented here thus provides an experimentally validated in silico platform for further studies of this important industrial and biomedical organism.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
BACKGROUND: Mycobacterium tuberculosis continues to be a major pathogen in the third world, killing almost 2 million people a year by the most recent estimates. Even in industrialized countries, the emergence of multi-drug resistant (MDR) strains of tuberculosis hails the need to develop additional medications for treatment. Many of the drugs used for treatment of tuberculosis target metabolic enzymes. Genome-scale models can be used for analysis, discovery, and as hypothesis generating tools, which will hopefully assist the rational drug development process. These models need to be able to assimilate data from large datasets and analyze them. RESULTS: We completed a bottom up reconstruction of the metabolic network of Mycobacterium tuberculosis H37Rv. This functional in silico bacterium, iNJ661, contains 661 genes and 939 reactions and can produce many of the complex compounds characteristic to tuberculosis, such as mycolic acids and mycocerosates. We grew this bacterium in silico on various media, analyzed the model in the context of multiple high-throughput data sets, and finally we analyzed the network in an 'unbiased' manner by calculating the Hard Coupled Reaction (HCR) sets, groups of reactions that are forced to operate in unison due to mass conservation and connectivity constraints. CONCLUSION: Although we observed growth rates comparable to experimental observations (doubling times ranging from about 12 to 24 hours) in different media, comparisons of gene essentiality with experimental data were less encouraging (generally about 55%). The reasons for the often conflicting results were multi-fold, including gene expression variability under different conditions and lack of complete biological knowledge. Some of the inconsistencies between in vitro and in silico or in vivo and in silico results highlight specific loci that are worth further experimental investigations. Finally, by considering the HCR sets in the context of known drug targets for tuberculosis treatment we proposed new alternative, but equivalent drug targets.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
Irani ZA, Kerkhoven E, Shojaosadati SA, Nielsen J.
Biotechnol. Bioeng. 2015 Oct;
Abstract:
Pichia pastoris is used for commercial production of human therapeutic proteins, and genome-scale models of P. pastoris metabolism have been generated in the past to study the metabolism and associated protein production by this yeast. A major challenge with clinical usage of recombinant proteins produced by P. pastoris is the difference in N-glycosylation of proteins produced by humans and this yeast. However, through metabolic engineering a P. pastoris strain capable of producing humanized N-glycosylated proteins was constructed. The current genome-scale models of P. pastoris do not address native nor humanized N-glycosylation, and we therefore developed ihGlycopastoris, an extension to the iLC915 model with both native and humanized N-glycosylation for recombinant protein production, but also an estimation of N-glycosylation of P. pastoris native proteins. This new model gives a better predictions of protein yield, demonstrates the effect of the different types of N-glycosylation of protein yield, and can be used to predict potential targets for strain improvement. The model represents a step towards a more complete description of protein production in P. pastoris, which is required for using these models to understand and optimize protein production processes. This article is protected by copyright. All rights reserved.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
Methanosarcina acetivorans strain C2A is a marine methanogenic archaeon notable for its substrate utilization, genetic tractability, and novel energy conservation mechanisms. To help probe the phenotypic implications of this organism's unique metabolism, we have constructed and manually curated a genome-scale metabolic model of M. acetivorans, iMB745, which accounts for 745 of the 4,540 predicted protein-coding genes (16%) in the M. acetivorans genome. The reconstruction effort has identified key knowledge gaps and differences in peripheral and central metabolism between methanogenic species. Using flux balance analysis, the model quantitatively predicts wild-type phenotypes and is 96% accurate in knockout lethality predictions compared to currently available experimental data. The model was used to probe the mechanisms and energetics of by-product formation and growth on carbon monoxide, as well as the nature of the reaction catalyzed by the soluble heterodisulfide reductase HdrABC in M. acetivorans. The genome-scale model provides quantitative and qualitative hypotheses that can be used to help iteratively guide additional experiments to further the state of knowledge about methanogenesis.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
This model originates from BioModels Database: A Database of Annotated Published Models (http://www.ebi.ac.uk/biomodels/). It is copyright (c) 2005-2011 The BioModels.net Team. To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
In summary, you are entitled to use this encoded model in absolutely any manner you deem suitable, verbatim, or with modification, alone or embedded it in a larger context, redistribute it, commercially or not, in a restricted way or not..
Hydrogenotrophic methanogenesis occurs in multiple environments, ranging from the intestinal tracts of animals to anaerobic sediments and hot springs. Energy conservation in hydrogenotrophic methanogens was long a mystery; only within the last decade was it reported that net energy conservation for growth depends on electron bifurcation. In this work, we focus on Methanococcus maripaludis, a well-studied hydrogenotrophic marine methanogen. To better understand hydrogenotrophic methanogenesis and compare it with methylotrophic methanogenesis that utilizes oxidative phosphorylation rather than electron bifurcation, we have built iMR539, a genome scale metabolic reconstruction that accounts for 539 of the 1,722 protein-coding genes of M. maripaludis strain S2. Our reconstructed metabolic network uses recent literature to not only represent the central electron bifurcation reaction but also incorporate vital biosynthesis and assimilation pathways, including unique cofactor and coenzyme syntheses. We show that our model accurately predicts experimental growth and gene knockout data, with 93% accuracy and a Matthews correlation coefficient of 0.78. Furthermore, we use our metabolic network reconstruction to probe the implications of electron bifurcation by showing its essentiality, as well as investigating the infeasibility of aceticlastic methanogenesis in the network. Additionally, we demonstrate a method of applying thermodynamic constraints to a metabolic model to quickly estimate overall free-energy changes between what comes in and out of the cell. Finally, we describe a novel reconstruction-specific computational toolbox we created to improve usability. Together, our results provide a computational network for exploring hydrogenotrophic methanogenesis and confirm the importance of electron bifurcation in this process.Understanding and applying hydrogenotrophic methanogenesis is a promising avenue for developing new bioenergy technologies around methane gas. Although a significant portion of biological methane is generated through this environmentally ubiquitous pathway, existing methanogen models portray the more traditional energy conservation mechanisms that are found in other methanogens. We have constructed a genome scale metabolic network of Methanococcus maripaludis that explicitly accounts for all major reactions involved in hydrogenotrophic methanogenesis. Our reconstruction demonstrates the importance of electron bifurcation in central metabolism, providing both a window into hydrogenotrophic methanogenesis and a hypothesis-generating platform to fuel metabolic engineering efforts.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
",
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- "id": 4688,
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- "id": 3388,
- "name": "Mohr2022 - Rabbit Purkinje Cardiac Electrophysiology",
- "repository_type": "biomodels",
- "summary": "we performed a comparative benchmark and investigated a variety of mathematical cardiac AP models, including a newly developed minimalistic model specifically tailored to the AP of rabbit Purkinje cells, for their ability to substitute experiments. The simulated changes in AP duration (dAPD90) at increasing drug concentrations were compared to experimental results from 588 internal Purkinje fiber studies covering 555 different drugs with diverse modes of action. Using our minimalistic model, 80% of the Purkinje experiments could be quantitatively reproduced.",
- "tags": [
- {
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- "tag": "BioModels"
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- {
- "id": 4689,
- "tag": "BioModels:BIOMD0000001100"
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- {
- "id": 4575,
- "tag": "UNKNOWN"
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- "timestamp_created": "2025-05-07 14:31:16.601930+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000001100",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "3389": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
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- "default_context": "4",
- "id": 3389,
- "name": "Zhou2024 - Post Infarction Myocyte Electromechanics",
- "repository_type": "biomodels",
- "summary": "A human ventricular electromechanical modelling and simulation framework is constructed and validated with rich experimental and clinical datasets. Abnormalities caused by scar and border zone ionic remodeling are introduced in varying degrees as reported in experimental data obtained in acute and chronic infarction. Simulations enabled reproducing and explaining clinical phenotypes post-MI, from ionic remodelling to ECGs and pressure-volume loops.",
- "tags": [
- {
- "id": 2936,
- "tag": "BioModels"
- },
- {
- "id": 4690,
- "tag": "BioModels:BIOMD0000001101"
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- {
- "id": 4691,
- "tag": "matlab"
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- "timestamp_created": "2025-05-07 14:31:17.059965+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000001101",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "3390": {
- "auto_sync": true,
- "content_types": "modeling",
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- "default_context": "5",
- "id": 3390,
- "name": "Burbano2023 - HGFsignaling_in_FattyLiverDisease",
- "repository_type": "biomodels",
- "summary": "
Chronic liver diseases are worldwide on the rise. Due to the rapidly increasing incidence, in particular in Western countries, non-alcoholic fatty liver disease (NAFLD) is gaining importance. As the disease progresses it can develop into hepatocellular carcinoma. Lipid accumulation in hepatocytes has been identified as the characteristic structural change in NAFLD development, but the molecular mechanisms responsible for disease development remained unresolved. Here, we uncover a strong downregulation of the PI3K-AKT pathway and an upregulation of the MAPK pathway in primary hepatocytes from a preclinical model fed with a Western diet (WD). Dynamic pathway modeling of hepatocyte growth factor (HGF) signal transduction combined with global proteomics identifies that an elevated basal MET phosphorylation rate is the main driver of altered signaling leading to increased proliferation of WD-hepatocytes. Model-adaptation to patient-derived hepatocytes reveals a patient-specific variability in basal MET phosphorylation, which correlates with the outcome of patients after liver surgery. Thus, dysregulated basal MET phosphorylation could be an indicator for the health status of the liver and thereby inform on the risk of a patient to suffer from liver failure after surgery.
",
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- "tag": "BioModels:BIOMD0000001102"
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- "id": 704,
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- "timestamp_created": "2025-05-07 14:31:17.513696+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/BIOMD0000001102",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
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- "last_name": "Admin",
- "username": "osbadmin"
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- "default_context": "feat-add-local-script",
- "id": 3392,
- "name": "OSBv2-test-local-script",
- "repository_type": "github",
- "summary": "The osbv2 repository but from a different branch",
- "tags": [
- {
- "id": 3,
- "tag": "osbv2"
- }
- ],
- "thumbnail": "repositories/3392/thumbnail.bin",
- "timestamp_created": "2025-06-10 11:23:04.653517+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/OSBv2",
- "user": {
- "email": "c@ab.com",
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- "content_types": "experimental",
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- "default_context": "draft",
- "id": 3393,
- "name": "test-dandi-001361",
- "repository_type": "dandi",
- "summary": "sdfasdfsadf **asdfsdf**",
- "tags": [
- {
- "id": 7,
- "tag": "human"
- }
- ],
- "timestamp_created": "2025-06-10 11:29:05.095570+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/001361",
- "user": {
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- "3396": {
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- "content_types": "modeling",
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- "modeling"
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- "default_context": "1",
- "id": 3396,
- "name": "biomodels-test",
- "repository_type": "biomodels",
- "summary": "",
- "tags": [],
- "timestamp_created": "2025-06-10 12:17:33.476868+00:00",
- "timestamp_updated": "---",
- "uri": "https://www.ebi.ac.uk/biomodels/MODEL8459127548",
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- "id": "6f47a287-9640-4c0f-89b9-50e637729deb",
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- "content_types": "experimental",
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- "default_context": "main",
- "id": 3397,
- "name": "Data Skills for Neuroscientists - dev",
- "repository_type": "github",
- "summary": "",
- "tags": [
- {
- "id": 653,
- "tag": "Tutorial"
- },
- {
- "id": 9,
- "tag": "Test"
- }
- ],
- "timestamp_created": "2025-07-25 13:26:28.306412+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenNeuroAI/DataSkillsforNeuroscientists",
- "user": {
- "email": "p.gleeson@gmail.com",
- "first_name": "Padraig",
- "id": "7089f659-90ad-4ed9-9715-2327f7e2e72f",
- "last_name": "Gleeson Admin",
- "username": "pgleeson"
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- "user_id": "7089f659-90ad-4ed9-9715-2327f7e2e72f"
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- "3398": {
- "auto_sync": true,
- "content_types": "modeling",
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- "default_context": "main",
- "id": 3398,
- "name": "Virtual Human Retina: Simulating Neural Signalling, Degeneration, and Responses to Electrical Stimulation (Ly et al 2025)",
- "repository_type": "github",
- "summary": "Abstract\r\nIntroduction: Current brain-based visual prostheses pose significant challenges impeding adoption such as the necessarily complex surgeries and occurrence of more substantial side effects due to the sensitivity of the brain. This has led to much effort toward vision restoration being focused on the more approachable part of the brain - the retina. Here we introduce a novel, parameterized simulation platform that enables study of human retinal degeneration and optimization of stimulation strategies. The platform bears immense potential for patient-specific tailoring and serves to enhance artificial vision solutions for individuals with visual impairments.\r\n\r\nMaterial and method: Our virtual retina is developed using the software package, NEURON. This virtual retina platform supports large-scale simulations of over 10,000 neurons whilst upholding strong biological plausibility with multiple important visual pathways and detailed network properties. The comprehensive three-dimensional model includes photoreceptors, horizontal cells, bipolar cells, amacrine cells, and midget and parasol retinal ganglion cells, with comprehensive network connectivity across various eccentricities (1 mm to 5 mm from the fovea) in the human retina. The model is constructed using electrophysiology, immunohistology, and optical coherence tomography imaging data from healthy and degenerate human retinas. We validated our model by replicating numerous experimental observations from human and primate retina, with a particular focus on retinal degeneration.\r\n\r\nResult: We simulated interactions between diseased retinas and state-of-the-art retinal implants, shedding light on the limitations of commercial retinal prostheses. Our results suggested that appropriate stimulation settings with intraretinal prototype devices could leverage network-mediated activation to achieve activation mosaics more alike that of the retina's response to natural light, promoting the prospect of more naturalistic vision. Our study additionally highlights the importance of controlling inhibitory circuits in the retinal network to induce functionally relevant retinal activity.\r\n\r\nConclusion: This study demonstrates the potential of this software package and highlights its utility as a valuable tool for engineers, scientists, and clinicians in the design and optimisation of retinal stimulation devices for both research and educational applications.\r\n\r\nKeywords: Virtual retina; bionic vision; data-driven model; discrete neuronal network model; electrical stimulation; human retina; mechanistic model; retinal degeneration.",
- "tags": [
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 4695,
- "tag": "ModelDB:2018247"
- },
- {
- "id": 577,
- "tag": "NEURON"
- }
- ],
- "timestamp_created": "2025-08-12 17:11:44.829170+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/2018247",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3399": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 3399,
- "name": "Intrinsic motivation in cognitive architecture (Nagashima et al., 2024)",
- "repository_type": "github",
- "summary": "These models are designed for a maze continuation task that specifically emphasizes curiosity. The act-r directory represents a model implemented using ACT-R, a cognitive architecture. On the other hand, the icm directory represents a model implemented using the Intrinsic Curiosity Module (ICM) for deep reinforcement learning. Despite the difference in implementation, both models are intended to perform the same task.",
- "tags": [
- {
- "id": 4696,
- "tag": "Lisp"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 4697,
- "tag": "ModelDB:267752"
- },
- {
- "id": 620,
- "tag": "Python"
- }
- ],
- "timestamp_created": "2025-08-12 17:35:15.390947+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/267752",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3400": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 3400,
- "name": "Dendritic action potentials and computation in human layer 2/3 cortical neurons with modulated input (Ko\u0159enek et al., 2025)",
- "repository_type": "github",
- "summary": "This model replicates Settings 1/2 in Figure 1/2/3 in the paper Ko\u0159enek J., Sanda P., and Hlinka J., 2025: Higher order definition of causality by optimally conditioned transfer entropy. Physical Review E, E 111, L042302. It is slight modification of Gidon et al., 2020 model (254217).",
- "tags": [
- {
- "id": 565,
- "tag": "Dendritic Action Potentials"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 1532,
- "tag": "I Na, leak"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 4698,
- "tag": "ModelDB:2016664"
- },
- {
- "id": 577,
- "tag": "NEURON"
- }
- ],
- "timestamp_created": "2025-08-12 17:35:21.577626+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/2016664",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3401": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 3401,
- "name": "STSimM: a new tool for evaluating neuron model performance and detecting spike trains similarity (Marasco et al., 2024)",
- "repository_type": "github",
- "summary": "\"Four time-scale adaptive performance and similarity measures are proposed and implemented in the STSimM (Spike Trains Similarity Measures) Python tool. These measures are designed to accurately capture both the precise timing of individual spikes and shared periods of inactivity among spike trains.\"",
- "tags": [
- {
- "id": 1697,
- "tag": "Cython"
- },
- {
- "id": 756,
- "tag": "Methods"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 4699,
- "tag": "ModelDB:2016671"
- },
- {
- "id": 620,
- "tag": "Python"
- }
- ],
- "timestamp_created": "2025-08-12 17:35:22.913831+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/2016671",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3402": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 3402,
- "name": "Cerebellar Golgi cell model with STDP (Pali et al., 2025)",
- "repository_type": "github",
- "summary": "Cerebellar Golgi cell model (Masoli et al., 2020) with STDP based on Shouval at el., 2002",
- "tags": [
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 4700,
- "tag": "ModelDB:2017007"
- },
- {
- "id": 577,
- "tag": "NEURON"
- }
- ],
- "timestamp_created": "2025-08-12 17:35:24.892668+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/2017007",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3403": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 3403,
- "name": "Substantia Nigra Par Compacta (Ortner et al., 2017)",
- "repository_type": "github",
- "summary": "The model contains three different isoforms of the calcium L- type channels (Cav1.2 \u03b11-subunit, long and short Cav1.3 \u03b11-subunit splice variants) according to the data and the descriptions of Ortner et al., 2017 J Neurosci. \r\nSince calcium overload confers the susceptibility of SNc neurons to neurodegeneration. our work described the impact of the those different L- type calcium isoforms in calcium accumulation, action potential firing and burst firing (NMDA-induced) of the SNc neurons. ",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 566,
- "tag": "Bursting"
- },
- {
- "id": 1684,
- "tag": "Ca pump"
- },
- {
- "id": 572,
- "tag": "Calcium dynamics"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 731,
- "tag": "I CAN"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 1531,
- "tag": "I Cl, leak"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 2319,
- "tag": "IK Skca"
- },
- {
- "id": 747,
- "tag": "I_KD"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 4701,
- "tag": "ModelDB:2017402"
- },
- {
- "id": 577,
- "tag": "NEURON"
- }
- ],
- "timestamp_created": "2025-08-12 17:35:26.094352+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/2017402",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3404": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 3404,
- "name": "Dorsal root ganglion (DRG) sensory pseudounipolar neuron and axon model (Farooqui et al., 2024)",
- "repository_type": "github",
- "summary": "These files include a class definition for a sensory DRG pseudounipolar neuron model and a sensory DRG axon model, each of which can be instantiated for any value of fiber diameter in the continuous range [6, 20] um. The models are written in Python with pyNEURON.\r\n\r\nThese models were used to investigate the effects of pseudounipolar neuron morphology and spatial distribution of neurons in the DRG on the selective activation of DRG A-alpha and A-beta sensory neurons in response to stimulation via two different types of electrodes (epineural and penetrating). ",
- "tags": [
- {
- "id": 727,
- "tag": "Action Potential Initiation"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 591,
- "tag": "I K,leak"
- },
- {
- "id": 1532,
- "tag": "I Na, leak"
- },
- {
- "id": 739,
- "tag": "I Na,p"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 4702,
- "tag": "ModelDB:2018004"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 620,
- "tag": "Python"
- },
- {
- "id": 2248,
- "tag": "Stimulus selectivity"
- },
- {
- "id": 764,
- "tag": "Touch"
- }
- ],
- "timestamp_created": "2025-08-12 17:35:27.434923+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/2018004",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3405": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 3405,
- "name": "Synchronization in a realistic model of CA1 hippocampal neurons (Fiasconaro and Migliore, 2024)",
- "repository_type": "github",
- "summary": "We study the synchronisation of neurons in a realistic model under the Hodgkin-Huxley dynamics. To focus on the role of the different locations of the excitatory synapses, we use two identical neurons where the set of input signals is grouped at two different distances from the soma. Synchronisation is studied using phase spiking correlation as a function of various parameters such as the distance from the soma of one of the synaptic groups, the inhibition weight and the associated activation delay.\r\n\r\nWe found that the neurons' spiking activity depends nonmonotonically on the relative dendritic location of the synapses and their inhibitory weight, whereas the synchronisation measure always decreases with inhibition, and strongly depends on its activation time delay.",
- "tags": [
- {
- "id": 1684,
- "tag": "Ca pump"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 731,
- "tag": "I CAN"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 589,
- "tag": "I L high threshold"
- },
- {
- "id": 580,
- "tag": "I M"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 575,
- "tag": "I T low threshold"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 747,
- "tag": "I_KD"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 4703,
- "tag": "ModelDB:2018006"
- },
- {
- "id": 577,
- "tag": "NEURON"
- }
- ],
- "timestamp_created": "2025-08-12 17:35:28.021764+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/2018006",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3406": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 3406,
- "name": "Dynamic Regulation of Vesicle Pools in a Detailed Spatial Model of the Complete Synaptic Vesicle Cycle (Gallimore et al, 2025)",
- "repository_type": "github",
- "summary": "Synaptic transmission is driven by a complex cycle of vesicle docking, release, and recycling, maintained by distinct vesicle pools. However, the partitioning of vesicle pools and reserve pool recruitment remain poorly understood. We use a novel vesicle modeling technology to model the synaptic vesicle cycle in unprecedented molecular and spatial detail at a hippocampal synapse. Our model demonstrates robust recycling of synaptic vesicles that maintains consistent synaptic release, even during sustained high frequency firing. We also reveal how the cytosolic proteins synapsin-1 and tomosyn-1 cooperate to regulate recruitment of reserve pool vesicles during sustained firing to maintain transmission, as well as the potential of selective vesicle active zone tethering to ensure rapid vesicle replenishment while minimizing reserve pool recruitment. We also monitored vesicle usage in isolated hippocampal neurons using pH-sensitive pHluorin, demonstrating that reserve vesicle recruitment depends on frequency, even at non-physiologically high firing frequencies, as predicted by the model.",
- "tags": [
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 4704,
- "tag": "ModelDB:2018007"
- },
- {
- "id": 1919,
- "tag": "Reaction-diffusion"
- },
- {
- "id": 1574,
- "tag": "STEPS"
- },
- {
- "id": 1576,
- "tag": "Stochastic simulation"
- }
- ],
- "timestamp_created": "2025-08-12 17:35:28.610978+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/2018007",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3407": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 3407,
- "name": "Depolarization baseline offset in CA1 pyramidal neurons (Kumar et al., 2025)",
- "repository_type": "github",
- "summary": "These sets of models were used to investigate the mechanisms behind the large depolarization baseline offset (DBLO) seen in CA1 pyramidal neurons.\r\nSomatic step-current injection is commonly used to characterize electrophysiological properties of neurons. Many neuronal types show a large depolarization baseline offset (DBLO), which is defined as the positive difference between the minimum membrane potential during action potential trains and resting. We used stochastic parameter search in conductance-based models to show that four key factors together account for high DBLO: Liquid Junction Potential correction, high backpropagating passive charges during the repolarization phase of an action potential, fast potassium delayed rectifier kinetics, and appropriate transient sodium current kinetics. Several plausible mechanisms for DBLO, such as Ohmic depolarization due to current input or low-pass filtering by the membrane, fail to explain the effect, and many published sophisticated conductance-based models do not correctly manifest high DBLO. Finally, models with experimentally consistent levels of DBLO constrain the parameter space of ion channel levels and kinetics. We also highlight the role these models may play in correctly identifying neuronal factors behind several cellular mechanisms such as bistable firing, spikelets, and calcium influx.\r\n",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 728,
- "tag": "Axonal Action Potentials"
- },
- {
- "id": 572,
- "tag": "Calcium dynamics"
- },
- {
- "id": 1983,
- "tag": "Conductances estimation"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 739,
- "tag": "I Na,p"
- },
- {
- "id": 574,
- "tag": "I Na,t"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 2895,
- "tag": "Impedance"
- },
- {
- "id": 567,
- "tag": "Ion Channel Kinetics"
- },
- {
- "id": 1838,
- "tag": "MOOSE/PyMOOSE"
- },
- {
- "id": 756,
- "tag": "Methods"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 4705,
- "tag": "ModelDB:2018017"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 568,
- "tag": "Parameter Fitting"
- },
- {
- "id": 569,
- "tag": "Simplified Models"
- }
- ],
- "timestamp_created": "2025-08-12 17:35:29.522755+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/2018017",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3408": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 3408,
- "name": "Cerebellar basket cell model (Masoli et al., 2025)",
- "repository_type": "github",
- "summary": "\"The analysis of BC inhibition of PCs was extended over a broad parameter space using accurate multi-compartmental computational models. During pf bursts, the BC reduced the PC response at low-frequency, while SCs did it at high-frequency. BC filtering was explained by the engagement of HCN1 channels, which activated slowly during low-frequency BC-PC GABAergic transmission. The increase of input conductance caused by HCN1 channels in the PC soma, by shunting excitatory currents elicited by pfs and travelling toward the axon initial segment (AIS), reduced the PC output frequency.\"",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 4706,
- "tag": "ModelDB:2018018"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 596,
- "tag": "Synaptic Integration"
- }
- ],
- "timestamp_created": "2025-08-12 17:35:30.160639+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/2018018",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3409": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 3409,
- "name": "Cerebellar stellate cell model (Rizza et al., 2021)",
- "repository_type": "github",
- "summary": "\"Simulations showed that, following parallel fiber stimulation, Purkinje cells almost linearly increased their response with input frequency, but such an increase was inhibited by stellate cells, which leveled the Purkinje cell gain curve to its 4 Hz value. When reciprocal inhibitory connections between stellate cells were activated, the control of stellate cells over Purkinje cell discharge was maintained only at very high frequencies.\"",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 1532,
- "tag": "I Na, leak"
- },
- {
- "id": 594,
- "tag": "I h"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 4707,
- "tag": "ModelDB:2018019"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 596,
- "tag": "Synaptic Integration"
- }
- ],
- "timestamp_created": "2025-08-12 17:35:30.655983+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/2018019",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3410": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 3410,
- "name": "Octopus neuron (Kreeger et al., 2025)",
- "repository_type": "github",
- "summary": "Animals navigate the auditory world by recognizing complex sounds, from the rustle of a predator to the call of a potential mate. This ability depends in part on the octopus cells of the auditory brainstem, which respond to multiple frequencies that change over time, as occurs in natural stimuli. Unlike the average neuron, which integrates inputs over time on the order of tens of milliseconds, octopus cells must detect momentary coincidence of excitatory inputs from the cochlea during an ongoing sound on both the millisecond and submillisecond time scale. Here, we show that octopus cells receive inhibitory inputs on their dendrites that enhance opportunities for coincidence detection in the cell body, thereby allowing for responses both to rapid onsets at the beginning of a sound and to frequency modulations during the sound. This mechanism is crucial for the fundamental process of integrating the synchronized frequencies of natural auditory signals over time.",
- "tags": [
- {
- "id": 595,
- "tag": "Coincidence Detection"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 4708,
- "tag": "ModelDB:2018259"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 586,
- "tag": "Synchronization"
- }
- ],
- "timestamp_created": "2025-08-12 17:35:31.839552+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/2018259",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
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- "default_context": "main",
- "id": 3411,
- "name": "L2/3 Dendritic Morphology (Landau et al., 2022)",
- "repository_type": "github",
- "summary": "This code has some accurate morphological models of L2/3 neurons recorded in slices from mouse cortex. The paper it's related to aimed to understand how dendritic morphology (branching structure) affected action potential backpropagation and calcium signaling in dendrites, and that's what this code allows you to study. \r\n\r\nhttps://github.com/landoskape/landau-2022",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 579,
- "tag": "Active Dendrites"
- },
- {
- "id": 590,
- "tag": "I A"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 570,
- "tag": "Influence of Dendritic Geometry"
- },
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- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 4709,
- "tag": "ModelDB:2018260"
- },
- {
- "id": 577,
- "tag": "NEURON"
- }
- ],
- "timestamp_created": "2025-08-12 17:35:32.359575+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/2018260",
- "user": {
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- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
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- "username": "osbadmin"
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- "default_context": "main",
- "id": 3412,
- "name": "KV1 Channels Enable Myelinated Axons to Transmit Spikes Reliably without Spiking Ectopically (Abdollahi et al., 2025)",
- "repository_type": "github",
- "summary": "Action potentials (spikes) are regenerated at each node of Ranvier during saltatory transmission along a myelinated axon. The high density of voltage-gated sodium channels required by nodes to reliably transmit spikes increases the risk of ectopic spike generation in the axon. Here we show that ectopic spiking is avoided because KV1 channels prevent nodes from responding to slow depolarization; instead, axons respond selectively to rapid depolarization because KV1 channels implement a high-pass filter. To characterize this filter, we compared spike initiation properties in the soma and axon of CA1 pyramidal neurons from mice of both sexes, using spatially restricted photoactivation of channelrhodopsin-2 (ChR2) to evoke spikes in either region while simultaneously recording at the soma. Somatic photostimulation evoked repetitive spiking whereas axonal photostimulation evoked transient spiking. Blocking KV1channels converted the axon photostimulation response to repetitive spiking and encouraged spontaneous ectopic spike initiation in the axon. According to computational modeling, the high-pass filter implemented by KV1 channels matches the axial current waveform associated with saltatory conduction, enabling axons to faithfully transmit digital signals by maximizing their signal-to-noise ratio for this task. Specifically, a node generates a single spike only when rapidly depolarized, which is precisely what occurs during saltatory conduction when a pulse of axial current(triggered by a spike occurring at the upstream node) reaches the next node. The soma and axon use distinct spike initiation mechanisms (filters) appropriate for the task required of each region, namely, analog-to-digital transduction in the soma versus digital signal transmission in the axon.",
- "tags": [
- {
- "id": 1794,
- "tag": "Channelrhodopsin (ChR)"
- },
- {
- "id": 576,
- "tag": "I K"
- },
- {
- "id": 591,
- "tag": "I K,leak"
- },
- {
- "id": 2162,
- "tag": "I Na, slow inactivation"
- },
- {
- "id": 861,
- "tag": "I_K,Na"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 4710,
- "tag": "ModelDB:2018262"
- }
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- "timestamp_created": "2025-08-12 17:35:32.947880+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/2018262",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 3413,
- "name": "Network models of single compartment neurons for investigating downmodulation of voltage-gated potassium channels (Ho et al., 2025)",
- "repository_type": "github",
- "summary": "Voltage-gated potassium conductances gK play a critical role not only in normal neural function, but also in many neurological disorders and related therapeutic interventions. In particular, in an important animal model of epileptic seizures, 4-aminopyridine (4-AP) administration is thought to induce seizures by reducing gK in cortex and other brain areas. Interestingly, 4-AP has also been useful in the treatment of neurological disorders such as multiple sclerosis (MS) and spinal cord injury, where it is thought to improve action potential propagation in axonal fibers. Here, we examined gK downmodulation in biophysical models of cortical networks that included different neuron types organized in layers, potassium diffusion in interstitial and larger extracellular spaces, and glial buffering. Our findings are fourfold. First, gK downmodulation in pyramidal and fast-spiking inhibitory interneurons led to\r\ndifferential effects, making the latter much more likely to enter depolarization block. Second, both neuron types showed an increase in the duration and amplitude of action potentials, with more pronounced effects in pyramidal neurons. Third, a sufficiently strong gK reduction dramatically increased network synchrony, resulting in seizure-like dynamics. Fourth, we hypothesized that broader action potentials were likely to not only improve their propagation, as in 4-AP therapeutic uses, but also to increase synaptic coupling. Notably, graded-synapses incorporating this effect further amplified network synchronization and seizure-like dynamics. Overall, our findings elucidate different effects that gK downmodulation may have in cortical networks, explaining its potential role in both pathological neural dynamics and therapeutic applications.",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 469,
- "tag": "Epilepsy"
- },
- {
- "id": 583,
- "tag": "I Calcium"
- },
- {
- "id": 1531,
- "tag": "I Cl, leak"
- },
- {
- "id": 581,
- "tag": "I K,Ca"
- },
- {
- "id": 591,
- "tag": "I K,leak"
- },
- {
- "id": 1532,
- "tag": "I Na, leak"
- },
- {
- "id": 739,
- "tag": "I Na,p"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 1433,
- "tag": "I_AHP"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 4711,
- "tag": "ModelDB:2018263"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 740,
- "tag": "Na/K pump"
- },
- {
- "id": 659,
- "tag": "NetPyNE"
- },
- {
- "id": 1576,
- "tag": "Stochastic simulation"
- },
- {
- "id": 744,
- "tag": "Synaptic noise"
- },
- {
- "id": 586,
- "tag": "Synchronization"
- }
- ],
- "timestamp_created": "2025-08-12 17:35:33.804879+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/2018263",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 3414,
- "name": "Counterfactual eraser (Gidon et al., 2025)",
- "repository_type": "github",
- "summary": "The study simulated neural activity in a toy model of an artificial brain during a visual stimulus and then replayed the recorded signals to degrade the computation by eliminating counterfactual activity. This paradoxical finding\u2014where the replay did not affect ongoing neural dynamics yet disrupted the computational structure\u2014challenges the view that consciousness emerges from computation in either artificial or biological systems.",
- "tags": [
- {
- "id": 736,
- "tag": "Action Potentials"
- },
- {
- "id": 578,
- "tag": "Activity Patterns"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 4712,
- "tag": "ModelDB:2018266"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 724,
- "tag": "Short-term Synaptic Plasticity"
- },
- {
- "id": 569,
- "tag": "Simplified Models"
- },
- {
- "id": 725,
- "tag": "Synaptic Plasticity"
- }
- ],
- "timestamp_created": "2025-08-12 17:35:34.364768+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/2018266",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "auto_sync": true,
- "content_types": "modeling",
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- "modeling"
- ],
- "default_context": "main",
- "id": 3415,
- "name": "Differential roles of NaV1.2 and NaV1.6 in neocortical pyramidal cell excitability (Garcia et al. 2025)",
- "repository_type": "github",
- "summary": "Based on the Layer 5 thick-tufted pyramidal cell from the Blue Brain Project, we modeled the selective block of Nav1.2 and Nav1.6 to determine their precise roles in pyramidal cell excitability.",
- "tags": [
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 4713,
- "tag": "ModelDB:2019342"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 620,
- "tag": "Python"
- }
- ],
- "timestamp_created": "2025-08-12 17:35:34.923735+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/2019342",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "3416": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 3416,
- "name": "SCN1A variants of uncertain significance (Knox et al, 2025)",
- "repository_type": "github",
- "summary": "A PV+ interneuron model in the netpyne environment with code to test SCN1A variant effects on rheobase and depolarization block threshold.",
- "tags": [
- {
- "id": 469,
- "tag": "Epilepsy"
- },
- {
- "id": 582,
- "tag": "I Sodium"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 4714,
- "tag": "ModelDB:2019444"
- },
- {
- "id": 659,
- "tag": "NetPyNE"
- }
- ],
- "timestamp_created": "2025-08-12 17:35:35.438971+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/2019444",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "main",
- "id": 3417,
- "name": "3D reconstructed astrocyte with K+ dynamics",
- "repository_type": "github",
- "summary": "A NEURON implementation of the K\u207a accumulation and clearance curves from Figure\u202f5 of Savtchenko et\u202fal. (2018, Nature Communications), using four CA1 astrocytes to reproduce that panel. By focusing on the regions modeled in Fig\u202f5, this setup isolates transporter\u2011 and Kir4.1 channel\u2011mediated currents as well as spatial buffering to match the published profiles.",
- "tags": [
- {
- "id": 571,
- "tag": "Detailed Neuronal Models"
- },
- {
- "id": 584,
- "tag": "I Potassium"
- },
- {
- "id": 2396,
- "tag": "Kir, inactivating"
- },
- {
- "id": 564,
- "tag": "ModelDB"
- },
- {
- "id": 4715,
- "tag": "ModelDB:2019791"
- },
- {
- "id": 577,
- "tag": "NEURON"
- },
- {
- "id": 1808,
- "tag": "Potassium buffering"
- }
- ],
- "timestamp_created": "2025-08-12 17:35:36.610590+00:00",
- "timestamp_updated": "---",
- "uri": "https://github.com/OpenSourceBrain/2019791",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3418": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "0.250609.2249",
- "id": 3418,
- "name": "A flexible hippocampal population code for experience relative to reward",
- "repository_type": "dandi",
- "summary": "2-photon imaging and behavioral data from hippocampal area CA1 during virtual reality navigation in mice. Included in Sosa, Plitt, & Giocomo, \"A flexible hippocampal population code for experience relative to reward,\" Nature Neuroscience.\n\nTo reinforce rewarding behaviors, events leading up to and following rewards must be remembered. Hippocampal place cell activity spans spatial and non-spatial episodes, but whether hippocampal activity encodes entire sequences of events relative to reward is unknown. To test this, we performed two-photon imaging of hippocampal CA1 as mice navigated virtual environments with changing hidden reward locations. When the reward moved, a subpopulation of neurons updated their firing fields to the same relative position with respect to reward, constructing behavioral timescale sequences spanning the entire task. Over learning, this reward-relative representation became more robust as additional neurons were recruited, and changes in reward-relative firing often preceded behavioral adaptations following reward relocation. Concurrently, the spatial environment code was maintained through a parallel, dynamic subpopulation rather than through dedicated cell classes. These findings reveal how hippocampal ensembles flexibly encode multiple aspects of experience while amplifying behaviorally relevant information.",
- "tags": [
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 5116,
- "tag": "DANDI:001361"
- },
- {
- "id": 194,
- "tag": "Mus musculus - House mouse"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 5117,
- "tag": "hippocampus, navigation, learning, memory, 2-photon imaging, place cells"
- }
- ],
- "timestamp_created": "2025-08-13 12:03:06.232879+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/001361/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3419": {
- "auto_sync": true,
- "content_types": "modeling",
- "content_types_list": [
- "modeling"
- ],
- "default_context": "3",
- "id": 3419,
- "name": "Goldbeter1991 - Min Mit Oscil",
- "repository_type": "biomodels",
- "summary": "
Goldbeter1991 - Min Mit Oscil
Minimal cascade model for the mitotic oscillator involving cyclin and cdc2 kinase.
This model has been generated by MathSBML 2.4.6 (14-January-2005) 14-January-2005 18:33:39.806932.
Proc. Natl. Acad. Sci. U.S.A. 1991; 88(20):9107-11
Abstract:
A minimal model for the mitotic oscillator is presented. The model, built on recent experimental advances, is based on the cascade of post-translational modification that modulates the activity of cdc2 kinase during the cell cycle. The model pertains to the situation encountered in early amphibian embryos, where the accumulation of cyclin suffices to trigger the onset of mitosis. In the first cycle of the bicyclic cascade model, cyclin promotes the activation of cdc2 kinase through reversible dephosphorylation, and in the second cycle, cdc2 kinase activates a cyclin protease by reversible phosphorylation. That cyclin activates cdc2 kinase while the kinase triggers the degradation of cyclin has suggested that oscillations may originate from such a negative feedback loop [F\u00e9lix, M. A., Labb\u00e9, J. C., Dor\u00e9e, M., Hunt, T. & Karsenti, E. (1990) Nature (London) 346, 379-382]. This conjecture is corroborated by the model, which indicates that sustained oscillations of the limit cycle type can arise in the cascade, provided that a threshold exists in the activation of cdc2 kinase by cyclin and in the activation of cyclin proteolysis by cdc2 kinase. The analysis shows how miototic oscillations may readily arise from time lags associated with these thresholds and from the delayed negative feedback provided by cdc2-induced cyclin degradation. A mechanism for the origin of the thresholds is proposed in terms of the phenomenon of zero-order ultrasensitivity previously described for biochemical systems regulated by covalent modification.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
This model represents the inactive forms of CDC-2 Kinase and Cyclin Protease as separate species, unlike the ODEs in the published paper, in which the equations for the inactive forms are substituted into the equations for the active forms using a mass conservation rule M+MI=1,X+XI=1. Mass is still conserved in this model through the explicit reactions M<->MI and X<->XI. The terms in the kinetic laws are identical to the corresponding terms in the kinetic laws in the published paper.
This model has been generated by MathSBML 2.4.6 (14-January-2005) 14-January-2005 18:37:35.503857.
Proc. Natl. Acad. Sci. USA 1991 Oct; 88(20):9107-11
Abstract:
A minimal model for the mitotic oscillator is presented. The model, built on recent experimental advances, is based on the cascade of post-translational modification that modulates the activity of cdc2 kinase during the cell cycle. The model pertains to the situation encountered in early amphibian embryos, where the accumulation of cyclin suffices to trigger the onset of mitosis. In the first cycle ofthe bicyclic cascade model, cyclin promotes the activation of cdc2 kinase through reversible dephosphorylation, and in the second cycle, cdc2 kinase activates a cyclin protease by reversible phosphorylation. That cyclin activates cdc2 kinase while the kinase triggers the degradation of cyclin has suggested that oscillations may originate from such a negative feedback loop [F\u00e9lix, M. A., Labb\u00e9, J. C., Dor\u00e9e, M., Hunt, T. & Karsenti, E. (1990) Nature (London) 346, 379-382]. Thisconjecture is corroborated by the model, which indicates that sustained oscillations of the limit cycle type can arise in the cascade, provided that a threshold exists in the activation of cdc2 kinase by cyclin and in the activation of cyclinproteolysis by cdc2 kinase. The analysis shows how miototic oscillations may readily arise from time lags associated with these thresholds and from the delayed negative feedback provided by cdc2-induced cyclin degradation. A mechanism for theorigin of the thresholds is proposed in terms of the phenomenon of zero-order ultrasensitivity previously described for biochemical systems regulated by covalent modification.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
Proc. Natl. Acad. Sci. U.S.A. 1991; 88(16); 7328-32
Abstract:
The proteins cdc2 and cyclin form a heterodimer (maturation promoting factor) that controls the major events of the cell cycle. A mathematical model for the interactions of cdc2 and cyclin is constructed. Simulation and analysis of the model show that the control system can operate in three modes: as a steady state with high maturation promoting factor activity, as a spontaneous oscillator, or as an excitable switch. We associate the steady state with metaphase arrest in unfertilized eggs, the spontaneous oscillations with rapid division cycles in early embryos, and the excitable switch with growth-controlled division cycles typical of nonembryonic cells.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
Proc. Natl. Acad. Sci. U.S.A. 1991; 88(16); 7328-32
Abstract:
The proteins cdc2 and cyclin form a heterodimer (maturation promoting factor) that controls the major events of the cell cycle. A mathematical model for the interactions of cdc2 and cyclin is constructed. Simulation and analysis of the model show that the control system can operate in three modes: as a steady state with high maturation promoting factor activity, as a spontaneous oscillator, or as an excitable switch. We associate the steady state with metaphase arrest in unfertilized eggs, the spontaneous oscillations with rapid division cycles in early embryos, and the excitable switch with growth-controlled division cycles typical of nonembryonic cells.
This is a two variable reduction of the larger 6-variable model published in the same paper. The equations are:
u'= k4(v-u)(alpha+u^2)-k6*u v'=kappa-k6*u z= v-u with kappa = k1[aa]/[CT]
In the present implementation, an additional variable z is introduced with z = v-u is made, so that the different variables be interpreted as follows:
u=[activeMPF]/[CT] v=([cyclin]+[preMPF]+[activeMPF])/[CT] z=([ cyclin]+[preMPF])/[CT] with [CT]=[CDC2]+{CDC2P]+[preMPF]+[aMPF].
The reactions included are only to show the flows between z and u, and do not influence the species, as they all are set to boundaryCondition=True , meaning, that they are only determined by the rate rules (explicit differential equations) and assignment rules.
If you set boundaryCondition=False and remove the rate rules for v, u and the the assignment rule for z, you get the more symmetrical, but equivalent, version from the Cellerator repository:
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
A central event in the eukaryotic cell cycle is the decision to commence DNA replication (S phase). Strict controls normally operate to prevent repeated rounds of DNA replication without intervening mitoses (\"endoreplication\") or initiation of mitosis before DNA is fully replicated (\"mitotic catastrophe\"). Some of the genetic interactions involved in these controls have recently been identified in yeast. From this evidence we propose a molecular mechanism of \"Start\" control in Schizosaccharomyces pombe. Using established principles of biochemical kinetics, we compare the properties of this model in detail with the observed behavior of various mutant strains of fission yeast: wee1(-) (size control at Start), cdc13Delta and rum1(OP) (endoreplication), and wee1(-) rum1Delta (rapid division cycles of diminishing cell size). We discuss essential features of the mechanism that are responsible for characteristic properties of Start control in fission yeast, to expose our proposal to crucial experimental tests.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
Proc. Natl. Acad. Sci. U.S.A. 1998 Nov; 95(24): 14190-14195
Abstract:
We demonstrate, by using mathematical modeling of cell division cycle (CDC) dynamics, a potential mechanism for precisely controlling the frequency of cell division and regulating the size of a dividing cell. Control of the cell cycle is achieved by artificially expressing a protein that reversibly binds and inactivates any one of the CDC proteins. In the simplest case, such as the checkpoint-free situation encountered in early amphibian embryos, the frequency of CDC oscillations can be increased or decreased by regulating the rate of synthesis, the binding rate, or the equilibrium constant of the binding protein. In a more complex model of cell division, where size-control checkpoints are included, we show that the same reversible binding reaction can alter the mean cell mass in a continuously dividing cell. Because this control scheme is general and requires only the expression of a single protein, it provides a practical means for tuning the characteristics of the cell cycle in vivo.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
The temporal sequence of kinase activation, from MAPKKK (activated RAF) to the final effector MAPK (activated ERK), is described here. It is observed from the model that there is an increase in sensitivity along the levels of the cascade, where the activity of MAPK reaches its maximal before MAPKKK.
Proc. Natl. Acad. Sci. U.S.A. 1996:93(19):10078-83
Abstract:
The mitogen-activated protein kinase (MAPK) cascade is a highly conserved series of three protein kinases implicated in diverse biological processes. Here we demonstrate that the cascade arrangement has unexpected consequences for the dynamics of MAPK signaling. We solved the rate equations for the cascade numerically and found that MAPK is predicted to behave like a highly cooperative enzyme, even though it was not assumed that any of the enzymes in the cascade were regulated cooperatively. Measurements of MAPK activation in Xenopus oocyte extracts confirmed this prediction. The stimulus/response curve of the MAPK was found to be as steep as that of a cooperative enzyme with a Hill coefficient of 4-5, well in excess of that of the classical allosteric protein hemoglobin. The shape of the MAPK stimulus/ response curve may make the cascade particularly appropriate for mediating processes like mitogenesis, cell fate induction, and oocyte maturation, where a cell switches from one discrete state to another.
The species K_PP_norm, KKK_P_norm and KK_PP_norm are the relative concentrations of the active MAPK, MAPKK and MAPKKK, that is the double, or single resp. phophorylated forms divided by the total concentrations of each kinase. For MAPK additionally the also active MAPK divided by the maximal concentration of active MAPK is given by rel_K_PP_max. The parameter K_PP_norm_max, the maximal ratio of active MapK, has to be calculated for each change of parameters.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
Functional organization of signal transduction into protein phosphorylation cascades, such as the mitogen-activated protein kinase (MAPK) cascades, greatly enhances the sensitivity of cellular targets to external stimuli. The sensitivity increases multiplicatively with the number of cascade levels, so that a tiny change in a stimulus results in a large change in the response, the phenomenon referred to as ultrasensitivity. In a variety of cell types, the MAPK cascades are imbedded in long feedback loops, positive or negative, depending on whether the terminal kinase stimulates or inhibits the activation of the initial level. Here we demonstrate that a negative feedback loop combined with intrinsic ultrasensitivity of the MAPK cascade can bring about sustained oscillations in MAPK phosphorylation. Based on recent kinetic data on the MAPK cascades, we predict that the period of oscillations can range from minutes to hours. The phosphorylation level can vary between the base level and almost 100% of the total protein. The oscillations of the phosphorylation cascades and slow protein diffusion in the cytoplasm can lead to intracellular waves of phospho-proteins.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
This a model from the article: Which model to use for cortical spiking neurons? Izhikevich EM. IEEE Trans Neural Netw.2004 Sep;15(5):1063-70. 15484883, Abstract: We discuss the biological plausibility and computational efficiency of some of the most useful models of spiking and bursting neurons. We compare their applicability to large-scale simulations of cortical neural networks.
The model is according to the paperWhich Model to Use for Cortical Spiking Neurons? Figure1(S) inhibition-induced spiking has been reproduced by MathSBML. The ODE and the parameters values are taken from the a paper Simple Model of Spiking NeuronsThe original format of the models are encoded in the MATLAB format existed in the ModelDB with Accession number 39948
Figure1 are the simulation results of the same model with different choices of parameters and different stimulus function or events.a=-0.02; b=-1; c=-60; d=8; V=-63.8; u=b*V;
Cervical cancer is a global public health subject as it affects women in the reproductive ages, and accounts for the second largest burden among cancer patients worldwide with an unforgiving 50% mortality rate. Poor awareness and access to effective diagnosis have led to this enormous disease burden, calling for point-of-care, minimally invasive diagnosis methods. Here, an end-to-end quantitative approach for a new kind of diagnosis has been developed, comprising identification of optimal biomarkers, design of the sensor, and simulation of the diagnostic circuit. Using miRNA expression data in the public domain, we identified circulating miRNA biomarkers specific to cervical cancer using multi-tier screening. Synthetic riboregulators called toehold switches specific for the biomarker panel were then designed. To predict the dynamic range of toehold switches for use in genetic circuits as biosensors, we developed a generic grammar of these switches, and built a multivariate linear regression model using thermodynamic features derived from RNA secondary structure and interaction. The model yielded predictions of toehold efficacy with an adjusted R2 = 0.59. Reaction kinetics modelling was performed to predict the sensitivity of the second-generation toehold switches to the miRNA biomarkers. Simulations showed a linear response between 10nM and 100nM before saturation. Our study demonstrates an end-to-end workflow for the efficient design of genetic circuits geared towards the effective detection of unique genomic signatures that would be increasingly important in today\u2019s world. The approach has the potential to direct experimental efforts and minimise costs. All resources are provided open-source (https://github.com/igem2019) under GNU GPLv3 licence.
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- "summary": "This dataset was collected for the Global Local Oddball project, as part of the Allen Institute's OpenScope project. \nThe brain rapidly adapts to unchanging environments and is most excited by surprising events. A leading model to explain this phenomenon is predictive coding. Predictive coding proposes that the brain compares incoming sensory information against a prediction signal. This prediction is based on an internal model that is generated in higher-order cortex. This model reflects the brain\u2019s assumptions about the statistics of the environment. If an incoming sensory signal matches the prediction, the two signals cancel. Expected sensory data thus are \u201cexplained away\u201d and leave the brain unexcited. In other words, predictive coding is subtractive. Whenever the sensory signal does not match the prediction, subtraction results in a larger value, called the prediction error. This error signal initiates excitation in the lower-order cortex that propagates feedforward up the cortical hierarchy (i.e., V1, RL, LM, AL, PM, and AM). Prediction errors then instigate updates to the internal model to improve future predictions. Associated prediction update signals flow back down the hierarchy. Consistent with this model, optogenetic silencing of top-down inputs from frontal to visual cortex largely eliminates prediction error signals. However, the precise circuit mechanisms that generate these signals are largely unknown. Specifically, by recording from multiple neuropixels across the visual cortical hierarchy, we aimed to uncover what information is carried by layer 2 and 3 spikes that feed forward vs. by layer 5 and 6 spikes that feed back, using recently established analytic tools.\n",
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- "summary": "Adaptive and coordinated behavior requires that an animal be able to make predictions about the near and even far future. This intuition that some neural computations should be \u2018predictive\u2019 in their character has a long history, starting with ideas about how the receptive field structure of retinal ganglion cells relate to the statistics of natural visual scenes. Ideas about predictive computation have been most influential in thinking about the function of the neocortex. Here, the relatively stereotyped local circuitry of the neocortex has long led to speculation that each local circuit might be carrying out a somewhat similar, fundamental computation on its specific inputs. In addition, the organization of sensory-motor pathways into hierarchies (e.g., V1, V2, V4, IT in the ventral visual stream) with stereotyped feedforward and feedback connections has motivated ideas about hierarchical predictive codes, where higher levels of the hierarchy send predictions down to the lower level that then compares its inputs against the predictions and only send the surprises up the hierarchy (such as in the work of Mumford, Rao & Ballard, and Friston). Despite the wide influence of ideas about predictive coding, there is relatively little experimental evidence that such computations occur in multiple cortical areas, perhaps serving as a \u2018canonical computation\u2019 of the neocortical microcircuit. Our experimental design is based on a Sequence Learning Experiment, in which head-fixed mice passively view sequences of three different natural movie clips (labeled \u2018A\u2019, \u2018B\u2019, \u2018C\u2019), each having a duration of 2 seconds. We begin with one recording session (day #0), where the movie clips are presented in random order along with a 2 second grey screen (labeled \u2018X\u2019). Each stimulus occurs a total of 525 times, allowing a thorough characterization of neural responses before any sequence learning has occurred. Next, there are 3 recording sessions where the three movie clips are presented in a repeating temporal sequence, ABCABC\u2026, for 500 times, in order to train the mouse\u2019s brain. This training allows the mouse to potentially use the identity of the current movie clip predict the next movie clip. In addition, each sequence training session includes a period of random-order presentation, in order to assess changes in neural tuning during sequence learning. Finally, our last session (day #4) had stimuli presented in random order, allowing us to test more thoroughly how responses changed due to sequence learning.\n\nOur design uses 2-photon microscopy with eight simultaneously recorded fields-of-view. The fields-of-view will include both layer 2/3 and layer 4 as well as from multiple cortical areas: V1 (VISp), LM (VISl), AM (VISam), and PM (VISpm). The experiment used the Cux2-CreERTS2:Camk2a-tTa; Ai93(TITL-GCaMP6f) mouse line, which has expression in excitatory neurons of both layer 4 and 2/3.",
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- "id": 3438,
- "name": "Hippocampus and Entorhinal Cortex Dual Region Silicon Probe recording",
- "repository_type": "dandi",
- "summary": "Acute hippocampus and entorhinal cortex dual region silicon probe recording in head-fixed animals, both control and epileptic, running in virtual reality. Data was collected at either 3 weeks or 8 weeks after pilocarpine treatment. ",
- "tags": [
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 4747,
- "tag": "DANDI:000638"
- },
- {
- "id": 194,
- "tag": "Mus musculus - House mouse"
- },
- {
- "id": 24,
- "tag": "NWB"
- }
- ],
- "timestamp_created": "2025-08-14 10:55:05.391623+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000638/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "3439": {
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- "content_types": "experimental",
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- "default_context": "0.250122.0110",
- "id": 3439,
- "name": "Data for: Control of working memory by phase\u2013amplitude coupling of human hippocampal neurons",
- "repository_type": "dandi",
- "summary": "Retaining information in working memory is a demanding process that relies on cognitive control to protect memoranda-specific persistent activity from interference. However, how cognitive control regulates working memory storage is unclear. Here we show that interactions of frontal control and hippocampal persistent activity are coordinated by theta\u2013gamma phase\u2013amplitude coupling (TG-PAC). We recorded single neurons in the human medial temporal and frontal lobe while patients maintained multiple items in their working memory. In the hippocampus, TG-PAC was indicative of working memory load and quality. We identified cells that selectively spiked during nonlinear interactions of theta phase and gamma amplitude. The spike timing of these PAC neurons was coordinated with frontal theta activity when cognitive control demand was high. By introducing noise correlations with persistently active neurons in the hippocampus, PAC neurons shaped the geometry of the population code. This led to higher-fidelity representations of working memory content that were associated with improved behaviour. Our results support a multicomponent architecture of working memory, with frontal control managing maintenance of working memory content in storage-related areas. Within this framework, hippocampal TG-PAC integrates cognitive control and working memory storage across brain areas, thereby suggesting a potential mechanism for top-down control over sensory-driven processes.\n\nSample code that illustrates how to replicate key figures/analysis in Daume et. al. can be found here: https://github.com/rutishauserlab/SBCAT-release-NWB\n\nNote: sub-35_ses-1_ecephys+image.nwb is missing mean/std waveform data, but these data can be derived from the raw spike waveforms included in the file.",
- "tags": [
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 4748,
- "tag": "DANDI:000673"
- },
- {
- "id": 262,
- "tag": "Homo sapiens - Human"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 18,
- "tag": "cognitive neuroscience"
- },
- {
- "id": 19,
- "tag": "data standardization"
- },
- {
- "id": 22,
- "tag": "neurophysiology"
- },
- {
- "id": 23,
- "tag": "neurosurgery"
- },
- {
- "id": 25,
- "tag": "open source"
- },
- {
- "id": 4749,
- "tag": "phase-amplitude coupling"
- },
- {
- "id": 26,
- "tag": "single-neurons"
- },
- {
- "id": 280,
- "tag": "working memory"
- }
- ],
- "timestamp_created": "2025-08-14 10:55:08.151056+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000673/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3440": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "draft",
- "id": 3440,
- "name": "Element Calcium Imaging Data Upload",
- "repository_type": "dandi",
- "summary": "Direct upload of data from DataJoint's calcium imaging pipeline (element-calcium-imaging)",
- "tags": [
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 4750,
- "tag": "DANDI:000683"
- },
- {
- "id": 194,
- "tag": "Mus musculus - House mouse"
- },
- {
- "id": 24,
- "tag": "NWB"
- }
- ],
- "timestamp_created": "2025-08-14 10:55:12.025512+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000683/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3441": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "0.240515.1909",
- "id": 3441,
- "name": "Focusing electroporation to the center of a quadrupole electrode array by interference of unipolar pulses (NextGeneration-CANCAN)",
- "repository_type": "dandi",
- "summary": "These experimental trials demonstrate the feasibility of achieving remote targeting in electroporation by utilizing sequences of unipolar nanosecond electric pulses (nsEP), with the rotation of these packets further enhancing the process. Electroporation of the cells was evaluated using 1 uM YoPro-1 cell impermeable fluorescent dye. The study was supported in part by R21EY034258 from the National Eye Institute to A.G.P",
- "tags": [
- {
- "id": 409,
- "tag": "Bos taurus - Cattle"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 4751,
- "tag": "DANDI:000686"
- },
- {
- "id": 24,
- "tag": "NWB"
- }
- ],
- "timestamp_created": "2025-08-14 10:55:13.415410+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000686/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3442": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "0.250122.1735",
- "id": 3442,
- "name": "Long-term recordings of motor and premotor cortical spiking activity during reaching in monkeys",
- "repository_type": "dandi",
- "summary": "This dataset contains electrophysiology and behavioral data from three macaques performing either a center-out task or a continuous random target acquisition task. Neural activity was recorded from chronically-implanted electrode arrays in the primary motor cortex (M1) or dorsal premotor cortex (PMd) of four rhesus macaque monkeys. A subset of sessions includes recordings from both regions simultaneously. The data contains spiking activity\u2014manually spike sorted in three subjects, and threshold crossings in the fourth subject\u2014obtained from up to 192 electrodes per session, cursor position and velocity, and other task related metadata.",
- "tags": [
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 4752,
- "tag": "DANDI:000688"
- },
- {
- "id": 210,
- "tag": "Macaca mulatta - Rhesus monkey"
- },
- {
- "id": 24,
- "tag": "NWB"
- }
- ],
- "timestamp_created": "2025-08-14 10:55:16.192051+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000688/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3443": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "0.240530.1923",
- "id": 3443,
- "name": "Data supporting Neurotensin orchestrates valence assignment in the amygdala",
- "repository_type": "dandi",
- "summary": "This dandiset contains the data used in the paper, Li, H., Namburi, P., Olson, J.M. et al. Neurotensin orchestrates valence assignment in the amygdala. Nature 608, 586\u2013592 (2022). https://doi.org/10.1038/s41586-022-04964-y. It includes in vivo electrophysiology recordings of experiments for valence assignment in the amygdala, corresponding behavioral videos during Pavlovian discrimination tasks, and histology. A second cohort includes fiber photometry data.",
- "tags": [
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 4753,
- "tag": "DANDI:000689"
- },
- {
- "id": 194,
- "tag": "Mus musculus - House mouse"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 4754,
- "tag": "Pavlovian discrimination"
- },
- {
- "id": 4755,
- "tag": "basolateral amygdala (BLA)"
- },
- {
- "id": 4756,
- "tag": "deeplabcut"
- },
- {
- "id": 4757,
- "tag": "in vivo electrophysiology"
- },
- {
- "id": 29,
- "tag": "mouse"
- },
- {
- "id": 4758,
- "tag": "neutotensin"
- },
- {
- "id": 4759,
- "tag": "paraventricular nucleus of the thalamus (PVT)"
- },
- {
- "id": 4760,
- "tag": "valence assignment"
- }
- ],
- "timestamp_created": "2025-08-14 10:55:17.651336+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000689/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "3444": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "0.250326.0015",
- "id": 3444,
- "name": "Allen Institute Openscope - Vision2Hippocampus project",
- "repository_type": "dandi",
- "summary": "Extensive research shows that visual cortical neurons respond to specific stimuli, e.g. the primary visual cortical neurons respond to bars of light with specific orientation. In contrast, the hippocampal neurons are thought to encode not specific stimuli but instead represent abstract concepts such as space, time and events. How is this abstraction computed in the mouse brain? Specifically, how does the representation of simple visual stimuli evolve from the thalamus, which is a synapse away from the retina, through primary visual cortex, higher order visual areas and all the way to hippocampus, that is farthest removed from the retina?\n\nThe current OpenScope project aims to understand how the neural representations of simple and natural stimuli evolve from the LGN through V1, and most hippocampal regions, as well as some of the frontal areas. \n\nStimuli presented\nTwo main categories of visual stimuli were presented\u2013\n1.\tSimple visual motion, elicited by basic stimuli, like bars of light.\n2.\tComplex, potentially ethologically valid visual stimuli, elicited by movies involving eagles (and squirrels).\nTo parametrize the stimulus properties which might be affecting neural responses, mice were shown variants of the vertical bar of light as follows:\nA(o) \u2013 The bar of light was white, moving on a black background, 15 degrees wide, and moved at a fixed speed, covered the entire width of the screen in 2 seconds. It covered both movement directions consecutively (naso-temporal, then temporo-nasal).\nA(i) \u2013 Similar to A(o), but the bar was now thrice as wide (45o)\nA(ii) \u2013 Similar to A(o), but the bar was thrice as slow (covering the width of the screen in 6 seconds).\nA(iii) \u2013 Similar to A(o), but the contrast was flipped, i.e. a black bar of light on a white background.\nA(iv) - Similar to A(o), but instead of a simple white bar, the stimulus was striped, and each stripe changed color as the stimulus moved through the width of the screen. This was called \u201cdisco\u201d bar of light\nA(v) \u2013 In a subset of mice, A(o) was appended by frames corresponding to the bar of light \u201cvanishing\u201d at either of the edges. Two vanishing protocols were attempted, the bar of light is fully absorbed by the boundary, before reemerging. Another protocol had the bar of light vanish for ~1 second in addition to smoothly being absorbed by the boundary, before reemerging.",
- "tags": [
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 4761,
- "tag": "DANDI:000690"
- },
- {
- "id": 463,
- "tag": "Entorhinal cortex"
- },
- {
- "id": 194,
- "tag": "Mus musculus - House mouse"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 4718,
- "tag": "excitatory"
- },
- {
- "id": 52,
- "tag": "extracellular electrophysiology"
- },
- {
- "id": 92,
- "tag": "hippocampus"
- },
- {
- "id": 4720,
- "tag": "inhibitory"
- },
- {
- "id": 29,
- "tag": "mouse"
- },
- {
- "id": 4736,
- "tag": "movies"
- },
- {
- "id": 40,
- "tag": "neocortex"
- },
- {
- "id": 81,
- "tag": "neuropixel"
- },
- {
- "id": 67,
- "tag": "vision"
- }
- ],
- "timestamp_created": "2025-08-14 10:55:19.137736+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000690/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3445": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "draft",
- "id": 3445,
- "name": "Constant temperature behavior 16C",
- "repository_type": "dandi",
- "summary": "Fish swimming behavior in light at constant 16C",
- "tags": [
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 4762,
- "tag": "DANDI:000697"
- },
- {
- "id": 305,
- "tag": "Danio rerio - Zebra fish"
- },
- {
- "id": 24,
- "tag": "NWB"
- }
- ],
- "timestamp_created": "2025-08-14 10:55:24.429544+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000697/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3446": {
- "auto_sync": true,
- "content_types": "experimental",
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- "experimental"
- ],
- "default_context": "draft",
- "id": 3446,
- "name": "Constant temperature behavior 18C",
- "repository_type": "dandi",
- "summary": "Fish swimming behavior in light at constant 18C",
- "tags": [
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 4763,
- "tag": "DANDI:000698"
- },
- {
- "id": 305,
- "tag": "Danio rerio - Zebra fish"
- },
- {
- "id": 24,
- "tag": "NWB"
- }
- ],
- "timestamp_created": "2025-08-14 10:55:25.805353+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000698/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3447": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "draft",
- "id": 3447,
- "name": "Constant temperature behavior 20C",
- "repository_type": "dandi",
- "summary": "Fish swimming behavior in light at constant 20C",
- "tags": [
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 4764,
- "tag": "DANDI:000699"
- },
- {
- "id": 305,
- "tag": "Danio rerio - Zebra fish"
- },
- {
- "id": 24,
- "tag": "NWB"
- }
- ],
- "timestamp_created": "2025-08-14 10:55:27.244964+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000699/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3448": {
- "auto_sync": true,
- "content_types": "experimental",
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- "experimental"
- ],
- "default_context": "draft",
- "id": 3448,
- "name": "Constant temperature behavior 22C",
- "repository_type": "dandi",
- "summary": "Fish swimming behavior in light at constant 22C",
- "tags": [
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 4765,
- "tag": "DANDI:000700"
- },
- {
- "id": 305,
- "tag": "Danio rerio - Zebra fish"
- },
- {
- "id": 24,
- "tag": "NWB"
- }
- ],
- "timestamp_created": "2025-08-14 10:55:28.615799+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000700/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "3449": {
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- "content_types": "experimental",
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- "experimental"
- ],
- "default_context": "draft",
- "id": 3449,
- "name": "Constant temperature behavior 24C",
- "repository_type": "dandi",
- "summary": "Fish swimming behavior in light at constant 24C",
- "tags": [
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 4766,
- "tag": "DANDI:000701"
- },
- {
- "id": 305,
- "tag": "Danio rerio - Zebra fish"
- },
- {
- "id": 24,
- "tag": "NWB"
- }
- ],
- "timestamp_created": "2025-08-14 10:55:30.064180+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000701/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3450": {
- "auto_sync": true,
- "content_types": "experimental",
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- "experimental"
- ],
- "default_context": "draft",
- "id": 3450,
- "name": "Constant temperature behavior 26C",
- "repository_type": "dandi",
- "summary": "Fish swimming behavior in light at constant 26C",
- "tags": [
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 4767,
- "tag": "DANDI:000702"
- },
- {
- "id": 305,
- "tag": "Danio rerio - Zebra fish"
- },
- {
- "id": 24,
- "tag": "NWB"
- }
- ],
- "timestamp_created": "2025-08-14 10:55:31.494087+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000702/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3451": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "draft",
- "id": 3451,
- "name": "Constant temperature behavior 28C",
- "repository_type": "dandi",
- "summary": "Fish swimming behavior in light at constant 28C",
- "tags": [
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 4768,
- "tag": "DANDI:000703"
- },
- {
- "id": 305,
- "tag": "Danio rerio - Zebra fish"
- },
- {
- "id": 24,
- "tag": "NWB"
- }
- ],
- "timestamp_created": "2025-08-14 10:55:32.865771+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000703/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3452": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "draft",
- "id": 3452,
- "name": "Constant temperature behavior 30C",
- "repository_type": "dandi",
- "summary": "Fish swimming behavior in light at constant 30C",
- "tags": [
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 4769,
- "tag": "DANDI:000704"
- },
- {
- "id": 305,
- "tag": "Danio rerio - Zebra fish"
- },
- {
- "id": 24,
- "tag": "NWB"
- }
- ],
- "timestamp_created": "2025-08-14 10:55:34.270222+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000704/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- ],
- "default_context": "draft",
- "id": 3453,
- "name": "Constant temperature behavior 32C",
- "repository_type": "dandi",
- "summary": "Fish swimming behavior in light at constant 32C",
- "tags": [
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 4770,
- "tag": "DANDI:000705"
- },
- {
- "id": 305,
- "tag": "Danio rerio - Zebra fish"
- },
- {
- "id": 24,
- "tag": "NWB"
- }
- ],
- "timestamp_created": "2025-08-14 10:55:35.698185+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000705/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3454": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "draft",
- "id": 3454,
- "name": "Constant temperature behavior 34C",
- "repository_type": "dandi",
- "summary": "Fish swimming behavior in light at constant 34C",
- "tags": [
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 4771,
- "tag": "DANDI:000706"
- },
- {
- "id": 305,
- "tag": "Danio rerio - Zebra fish"
- },
- {
- "id": 24,
- "tag": "NWB"
- }
- ],
- "timestamp_created": "2025-08-14 10:55:37.108895+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000706/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3455": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "draft",
- "id": 3455,
- "name": "Gradient behavior 18C to 26C",
- "repository_type": "dandi",
- "summary": "Fish swimming behavior in thermal gradient from 18C to 26C in the light",
- "tags": [
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 4772,
- "tag": "DANDI:000707"
- },
- {
- "id": 305,
- "tag": "Danio rerio - Zebra fish"
- },
- {
- "id": 24,
- "tag": "NWB"
- }
- ],
- "timestamp_created": "2025-08-14 10:55:38.737398+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000707/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3456": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "draft",
- "id": 3456,
- "name": "Gradient behavior 24C to 32C",
- "repository_type": "dandi",
- "summary": "Fish swimming behavior in thermal gradient from 24C to 32C in the light",
- "tags": [
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 4773,
- "tag": "DANDI:000708"
- },
- {
- "id": 305,
- "tag": "Danio rerio - Zebra fish"
- },
- {
- "id": 24,
- "tag": "NWB"
- }
- ],
- "timestamp_created": "2025-08-14 10:55:40.160756+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000708/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3457": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "0.241009.1514",
- "id": 3457,
- "name": "NeuroPAL: Atlas of C. elegans neuron locations and colors in NeuroPAL worm",
- "repository_type": "dandi",
- "summary": "10 original NeuroPAL datasets used to train the statistical atlas in 'Statistical Atlas of C. elegans Neurons' and 'NeuroPAL: A Multicolor Atlas for Whole-Brain Neuronal Identification in C. elegans.\n\n",
- "tags": [
- {
- "id": 394,
- "tag": "Caenorhabditis elegans"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 4774,
- "tag": "DANDI:000715"
- },
- {
- "id": 24,
- "tag": "NWB"
- }
- ],
- "timestamp_created": "2025-08-14 10:55:46.818959+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000715/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3458": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "0.240716.1414",
- "id": 3458,
- "name": "VR-SASE Virtual Reality Dendritic Spine Analysis",
- "repository_type": "dandi",
- "summary": "The VR-SASE workflow uses Open Brush, open source, virtual reality art software, and Blender to segment neurons. A DataJoint pipeline determines spatial distribution of dendritic spines, filters them based on morphological parameters and is exported into a CSV for further analysis.",
- "tags": [
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 4784,
- "tag": "DANDI:000723"
- },
- {
- "id": 194,
- "tag": "Mus musculus - House mouse"
- },
- {
- "id": 24,
- "tag": "NWB"
- }
- ],
- "timestamp_created": "2025-08-14 10:55:52.088802+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000723/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3459": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "draft",
- "id": 3459,
- "name": "Multimodal Human Brain Imaging Data",
- "repository_type": "dandi",
- "summary": "Builds off of dandiset 26",
- "tags": [
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 4785,
- "tag": "DANDI:000724"
- }
- ],
- "timestamp_created": "2025-08-14 10:55:53.535042+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000724/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3460": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "0.240106.0043",
- "id": 3460,
- "name": "Mapping the Neural Dynamics of Locomotion across the Drosophila Brain",
- "repository_type": "dandi",
- "summary": "Walking is a fundamental mode of locomotion, yet its neural correlates are unknown at brain-wide scale in any animal. We use volumetric two-photon imaging to map neural activity associated with walking across the entire brain of Drosophila. We detect locomotor signals in approximately 40% of the brain, identify a global signal associated with the transition from rest to walking, and define clustered neural signals selectively associated with changes in forward or angular velocity. These networks span functionally diverse brain regions, and include regions that have not been previously linked to locomotion. We also identify time-varying trajectories of neural activity that anticipate future movements, and that represent sequential engagement of clusters of neurons with different behavioral selectivity. These motor maps suggest a dynamical systems framework for constructing walking maneuvers reminiscent of models of forelimb reaching in primates and set a foundation for understanding how local circuits interact across large-scale networks.",
- "tags": [
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 4786,
- "tag": "DANDI:000727"
- },
- {
- "id": 274,
- "tag": "Drosophila melanogaster - Fruit fly"
- },
- {
- "id": 24,
- "tag": "NWB"
- }
- ],
- "timestamp_created": "2025-08-14 10:55:55.139042+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000727/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3461": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "draft",
- "id": 3461,
- "name": "Protosequences in brain organoids model intrinsic brain states",
- "repository_type": "dandi",
- "summary": " This data for this study consists of sourced and original data sets:\n - Human brain organoid recordings (sourced):\n - [Sharf et al. Nat. Commun. 2022](https://doi.org/10.1038/s41467-022-32115-4)\n - [Din D.-M.A.E. et al. BioRxiv 2024](https://doi.org/10.1101/2024.09.17.613333 )\n - Primary murine cortical culture recordings (sourced):\n - [Bartram, J. et al. eLife 12, (2024)](https://doi.org/10.7554/eLife.86820.2)\n - [Yuan et al Nat. Commun. 2020](https://doi.org/10.1038/s41467-020-18620-4)\n - Murine brain organoid recordings (original)\n - Acute neonatal slice recordings from the murine somatosensory cortex (original)",
- "tags": [
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 4787,
- "tag": "DANDI:000732"
- },
- {
- "id": 262,
- "tag": "Homo sapiens - Human"
- },
- {
- "id": 24,
- "tag": "NWB"
- }
- ],
- "timestamp_created": "2025-08-14 10:55:58.063202+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000732/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3462": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "draft",
- "id": 3462,
- "name": "Novel genetically encoded tools for imaging neuropeptide release from presynaptic terminals in vivo",
- "repository_type": "dandi",
- "summary": "The dataset contains in vitro and in vivo data on the development of imaging neuropeptide release from the presynaptic terminal in the awake animal.",
- "tags": [
- {
- "id": 464,
- "tag": "Amygdala"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 4788,
- "tag": "DANDI:000766"
- },
- {
- "id": 194,
- "tag": "Mus musculus - House mouse"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 4789,
- "tag": "parabrachial nucleus"
- },
- {
- "id": 4790,
- "tag": "peptidergic neuron"
- }
- ],
- "timestamp_created": "2025-08-14 10:55:59.454274+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000766/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3463": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "0.231221.2138",
- "id": 3463,
- "name": "20231222_AIBS_Patchseq_nonhuman_primate",
- "repository_type": "dandi",
- "summary": "HMBA Lein PatchSeq upload (nonhuman primate) (Q4 2023)",
- "tags": [
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 4791,
- "tag": "DANDI:000768"
- },
- {
- "id": 506,
- "tag": "Macaca nemestrina"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 27,
- "tag": "Patch-seq"
- },
- {
- "id": 451,
- "tag": "multimodal"
- },
- {
- "id": 450,
- "tag": "non-human primate"
- }
- ],
- "timestamp_created": "2025-08-14 10:56:00.918897+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000768/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3464": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "0.231221.2138",
- "id": 3464,
- "name": "20231222_AIBS_Patchseq_human",
- "repository_type": "dandi",
- "summary": "HMBA Lein PatchSeq upload (human) (Q4 2023)",
- "tags": [
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 4792,
- "tag": "DANDI:000769"
- },
- {
- "id": 262,
- "tag": "Homo sapiens - Human"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 27,
- "tag": "Patch-seq"
- },
- {
- "id": 7,
- "tag": "human"
- },
- {
- "id": 451,
- "tag": "multimodal"
- }
- ],
- "timestamp_created": "2025-08-14 10:56:02.466738+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000769/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3465": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "draft",
- "id": 3465,
- "name": "Age affects odor-evoked calcium responses in the ant antennal lobe",
- "repository_type": "dandi",
- "summary": "Calcium imaging experiments were performed on the clonal raider ant antennal lobe to determine whether odor coding is modulated during aging. Ants were either two weeks old or two months old, corresponding to nurse-like and forager-like behavioral patterns. Ants are clonal line B with transgene insert [ie-DsRed, ObirOrco-QF2, 15xQUAS-GCaMP6s]. GCaMP6s labels all Orco-positive antennal lobe glomeruli and allows recording odor responses throughout the antennal lobe using volumetric imaging.\n\nAssociated with Hart et al. 2024. Pheromone representation in the ant antennal lobe changes with age. Current Biology 34. https://doi.org/10.1016/j.cub.2024.05.031\n\nAnts were stimulated with 5 general odorants (3-hexanone, isopropanol, ethanol, propionic acid, ethylpyrazine) and 2 alarm pheromones (4-methyl-3-heptanone and 4-methyl-3-heptanol) all at either 3% or 48% concentration (volume/volume in paraffin oil). Experiments had a 3s lag time and a 5s stimulus time, total recording time 48s, 0.83 volumes/second. 33 Z-planes were imaged in each volume.\n\nAnts were imaged on different days, and the following outline describes experiment conditions for the dataset.\n\nTwo weeks old experiment days:\n1-18-2023 - 48% odor conc.\n1-20-2023 - 48% odor conc. \n2-24-2023 - 48% odor conc.\n1-17-2023 - 3% odor conc.\n\nTwo months old experiment days:\n1-10-2023 - 48% odor conc.\n4-6-2023 - 48% odor conc.\n1-11-2023 - 3% odor conc. \n",
- "tags": [
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 4793,
- "tag": "DANDI:000773"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 392,
- "tag": "Ooceraea biroi - Clonal raider ant"
- }
- ],
- "timestamp_created": "2025-08-14 10:56:04.014714+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000773/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3466": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "draft",
- "id": 3466,
- "name": "Spatial and temporal propagation of spiking activity in response to electrical stimulation in visual cortex",
- "repository_type": "dandi",
- "summary": "Three dimensional measurement of electrical activity around a point source of electrical stimulation in neocortex. Electrical stimuli are single pulses with varying amplitude and polarity. Stimuli are delivered near the middle layers of primary visual cortex; exact positions for each stimulation site in Common Coordinate Framework (CCF) coordinates are provided. Measurements are made with three simultaneous Neuropixels 1.0 electrodes roughly orthogonally placed around the stimulation site. The crossing point is approximately hundreds of microns deeper to the stimulation site. CCF coordinated for each electrode are also provided. Sampling covers at least one millimeter in all directions around stimulation, including across cortical area boundaries and across boundaries to deeper brain structures including hippocampus. ",
- "tags": [
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 4794,
- "tag": "DANDI:000774"
- },
- {
- "id": 194,
- "tag": "Mus musculus - House mouse"
- },
- {
- "id": 24,
- "tag": "NWB"
- }
- ],
- "timestamp_created": "2025-08-14 10:56:05.413976+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000774/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3467": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "0.241009.1509",
- "id": 3467,
- "name": "Brain-wide representations of behavior spanning multiple timescales and states in C. elegans",
- "repository_type": "dandi",
- "summary": "Dataset of 38 worms from 'Brain-wide representations of behavior spanning multiple timescales and states in C. elegans'. Each NWB file contains the NIR bright-field images, GCaMP images, and NeuroPAL structural images, ROI locations and IDs, labeled activity traces, and behavioral information. \n",
- "tags": [
- {
- "id": 394,
- "tag": "Caenorhabditis elegans"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 4795,
- "tag": "DANDI:000776"
- },
- {
- "id": 24,
- "tag": "NWB"
- }
- ],
- "timestamp_created": "2025-08-14 10:56:06.836519+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000776/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "default_context": "draft",
- "id": 3468,
- "name": "Allen Institute Openscope - Predictive Learning and Somato-dendritic Coupling",
- "repository_type": "dandi",
- "summary": "This dataset was collected for the Dendritic Coupling project, as part of the Allen Institute's OpenScope project. \nPredictive coding hypotheses posit that perception is an active process whereby brain regions predict incoming sensory inputs, against which they are compared by other neural populations. Mismatches between predictions and inputs result in error signals that can then be used to update the predictive model encoded in synaptic weights, thereby driving plasticity. Although increasing amounts of evidence are consistent with the general framework, many different algorithmic implementations have been proposed, requiring further experiments to test specific corollaries of these varied approaches. One important, testable implication distinguishing some current theories involves the coupling strength in L2/3 and L5 pyramidal neurons between distal apical dendrites, which tend to receive top-down inputs that may include sensory prediction data, and their conjoined somata, which are often driven by bottom-up inputs. In particular, error signals are computed or else collocated in apical dendrites in some implementations, resulting in a quiescent subunit when the prediction matches inputs\u2014zero error\u2014and, thus, reduced dendro-somatic coupling during such times. In contrast, a separate proposal implies the opposite: Since many apical dendritic voltage signals can only reach their electrotonically segregated soma when facilitated by bursting induced by concurrent somatic sensory inputs, dendro-somatic coupling would instead be strongest when top-down predictions match bottom-up signals.\n\nOur experiment seeks to test these hypotheses by near-simultaneously imaging L2/3 and L5 somata and distal apical dendrites in mouse V1, LM, PM, and AM in transgenic lines that express GCaMP6f. Imaging four distinct areas allows us to also examine the consistency of the coupling rules, further putting the notion of a cortical canonical microcircuit to the test. By habituating animals to sets of visual stimuli with spatiotemporal patterns that are subsequently violated, we can evaluate the neural responses across the visual cortical hierarchy to help in adjudicating these important neuroscientific questions.\n",
- "tags": [
- {
- "id": 4796,
- "tag": "2-Photon Calcium Imaging"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 4797,
- "tag": "DANDI:000871"
- },
- {
- "id": 4798,
- "tag": "Dendro-somatic Coupling"
- },
- {
- "id": 4799,
- "tag": "Distal Apical Dendrites"
- },
- {
- "id": 4800,
- "tag": "Hierarchy"
- },
- {
- "id": 4801,
- "tag": "Multiplane Imaging"
- },
- {
- "id": 194,
- "tag": "Mus musculus - House mouse"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 601,
- "tag": "Neocortex"
- },
- {
- "id": 4802,
- "tag": "Pyramidal Neurons"
- },
- {
- "id": 4803,
- "tag": "Sensory Prediction"
- },
- {
- "id": 803,
- "tag": "Unsupervised Learning"
- }
- ],
- "timestamp_created": "2025-08-14 10:56:08.302419+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000871/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "3469": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
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- "default_context": "0.240515.1925",
- "id": 3469,
- "name": "Influence of unipolar pulse packet quantity on centering the electroporation effect within a quadrupole electrode array.",
- "repository_type": "dandi",
- "summary": "This data provides images of Yo-Pro uptake when different numbers of nanosecond electric pulse packets were applied in a four-electrode array. Increasing the total number of applied packets from 4 to 20 and 40 significantly enhanced the electroporative effect across the electrode array. The peak of electroporation at the center was clearly distinguishable for all tested treatments. The study was supported in part by NIH R21EY034258",
- "tags": [
- {
- "id": 409,
- "tag": "Bos taurus - Cattle"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 4804,
- "tag": "DANDI:000875"
- },
- {
- "id": 24,
- "tag": "NWB"
- }
- ],
- "timestamp_created": "2025-08-14 10:56:09.698995+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000875/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "3470": {
- "auto_sync": true,
- "content_types": "experimental",
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- "experimental"
- ],
- "default_context": "draft",
- "id": 3470,
- "name": "MVMNDA",
- "repository_type": "dandi",
- "summary": "Neuropixels SpikeGLX data for olfaction.",
- "tags": [
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 4805,
- "tag": "DANDI:000876"
- },
- {
- "id": 194,
- "tag": "Mus musculus - House mouse"
- },
- {
- "id": 24,
- "tag": "NWB"
- }
- ],
- "timestamp_created": "2025-08-14 10:56:11.095356+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000876/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "default_context": "0.241014.2127",
- "id": 3471,
- "name": "Thermal Plaid Experiments - steep gradients",
- "repository_type": "dandi",
- "summary": "Larval zebrafish navigating a virtual thermal plaid created by an infrared stimulus laser in a preheated experimental chamber",
- "tags": [
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 4806,
- "tag": "DANDI:000888"
- },
- {
- "id": 305,
- "tag": "Danio rerio - Zebra fish"
- },
- {
- "id": 24,
- "tag": "NWB"
- }
- ],
- "timestamp_created": "2025-08-14 10:56:12.487896+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000888/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "default_context": "0.240215.0831",
- "id": 3472,
- "name": "Oxygen Imaging of Hypoxic Pockets in the Mouse Cerebral Cortex",
- "repository_type": "dandi",
- "summary": "GeNL bioluminescence imaging detects the existence of spontaneous transient \"hypoxic pockets\" in awake behaving mice.",
- "tags": [
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 4807,
- "tag": "DANDI:000891"
- },
- {
- "id": 194,
- "tag": "Mus musculus - House mouse"
- },
- {
- "id": 24,
- "tag": "NWB"
- }
- ],
- "timestamp_created": "2025-08-14 10:56:13.869466+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000891/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3473": {
- "auto_sync": true,
- "content_types": "experimental",
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- ],
- "default_context": "0.240605.1710",
- "id": 3473,
- "name": "Neupane_Fiete_Jazayeri_Mental navigation_NHP_EntorhinalCortex",
- "repository_type": "dandi",
- "summary": "The dataset contains electrophysiology data recorded from the entorhinal cortex of two NHPs performing a mental navigation task. The recording probes used were V-probe with 32 channels or 64 channels, manufactured by Plexon Inc. ",
- "tags": [
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 4808,
- "tag": "DANDI:000897"
- },
- {
- "id": 210,
- "tag": "Macaca mulatta - Rhesus monkey"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 4809,
- "tag": "entorhinal cortex, cognitive map, mental navigation"
- }
- ],
- "timestamp_created": "2025-08-14 10:56:15.337938+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000897/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3474": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
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- ],
- "default_context": "0.240305.0945",
- "id": 3474,
- "name": "A mechanosensory feedback that uncouples external and self-generated sensory responses in the olfactory cortex",
- "repository_type": "dandi",
- "summary": "Dataset for \"A mechanosensory feedback that uncouples external and self-generated sensory responses in the olfactory cortex\", by A. Dehaquani, Michelon, et al., 2024 ",
- "tags": [
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 4810,
- "tag": "DANDI:000931"
- },
- {
- "id": 194,
- "tag": "Mus musculus - House mouse"
- },
- {
- "id": 24,
- "tag": "NWB"
- }
- ],
- "timestamp_created": "2025-08-14 10:56:16.867800+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000931/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3475": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "0.240317.0101",
- "id": 3475,
- "name": "An electroencephalogram microdisplay to visualize neuronal activity on the brain surface",
- "repository_type": "dandi",
- "summary": "These datasets contain electrocorticography recordings from the brains of pigs and rats, utilizing a 1024-channel intracranial electroencephalography (iEEG) microdisplay. These recordings were obtained from animals that participated in the study documented in the paper titled 'An electroencephalogram microdisplay to visualize neuronal activity on the brain surface'. The data includes noise that can be filtered out. For detailed instructions on this process, please consult the accompanying journal article.",
- "tags": [
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 4811,
- "tag": "DANDI:000932"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 4812,
- "tag": "Sus scrofa domesticus - Domestic pig"
- }
- ],
- "timestamp_created": "2025-08-14 10:56:18.439101+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000932/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3476": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "0.240315.1758",
- "id": 3476,
- "name": "20240331_AIBS_Patchseq_human",
- "repository_type": "dandi",
- "summary": "HMBA Lein PatchSeq upload (human) (Q1 2024)",
- "tags": [
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 4813,
- "tag": "DANDI:000933"
- },
- {
- "id": 262,
- "tag": "Homo sapiens - Human"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 27,
- "tag": "Patch-seq"
- },
- {
- "id": 7,
- "tag": "human"
- },
- {
- "id": 451,
- "tag": "multimodal"
- }
- ],
- "timestamp_created": "2025-08-14 10:56:19.981453+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000933/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3477": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
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- "default_context": "0.240315.1754",
- "id": 3477,
- "name": "20240331_AIBS_Patchseq_nonhuman_primate",
- "repository_type": "dandi",
- "summary": "HMBA Lein PatchSeq upload (nonhuman primate) (Q1 2024)",
- "tags": [
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 4814,
- "tag": "DANDI:000934"
- },
- {
- "id": 506,
- "tag": "Macaca nemestrina"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 27,
- "tag": "Patch-seq"
- },
- {
- "id": 451,
- "tag": "multimodal"
- },
- {
- "id": 450,
- "tag": "non-human primate"
- }
- ],
- "timestamp_created": "2025-08-14 10:56:21.374790+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000934/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3478": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "0.240319.2026",
- "id": 3478,
- "name": "Interluminescence: Selective Control of Synaptically-Connected Circuit Elements using bioluminescence",
- "repository_type": "dandi",
- "summary": "This is the repository for in vivo extracellular electrophysiology testing a bioluminescent-optogenetic synaptic element. In this experiment (see doi: 10.1038/s42003-021-02981-7), extracellular electrophysiology data and 1-photon bioluminescent imaging data were recorded from six PV-Cre mice under isoflurane anesthesia. There are two groups (Opsin(+) and Opsin(-), see session description and doi: 10.1038/s42003-021-02981-7 for details) of 3 animals each. For all animals a baseline of ~3 minutes of data was recorded, after which the bioluminescent luciferin Coelenterazine was infused into a saline well over an open craniotomy exposing barrel cortex. Time Intervals in the data set designate the start and stop times of Coelenterazine infusion in seconds.",
- "tags": [
- {
- "id": 4815,
- "tag": "Bioluminescence"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 4816,
- "tag": "DANDI:000935"
- },
- {
- "id": 4817,
- "tag": "Luminopsins"
- },
- {
- "id": 194,
- "tag": "Mus musculus - House mouse"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 4818,
- "tag": "Parvalbumin"
- },
- {
- "id": 4819,
- "tag": "gamma rhythms"
- }
- ],
- "timestamp_created": "2025-08-14 10:56:22.871038+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000935/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3479": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "0.240511.1846",
- "id": 3479,
- "name": "Visualization and characterization of membrane lesions",
- "repository_type": "dandi",
- "summary": "In this study, real-time imaging was used to visualize individual electropores and demonstrate their persistence in electroporated cells. HEK 923 cells were cultured on Indium Tin Oxide (ITO)-coated coverslips and loaded with the Cal520 fluorescent indicator for visualization. Real-time imaging was performed in Total Internal Reflection Fluorescent (TIRF) mode. Electrophysiological manipulations were applied using a patch clamp in voltage clamp mode, set in a whole-cell configuration. The protocol included a command voltage of 0 mV interrupted by a -50 mV pulse for 50 ms and a -400 mV pulse for 1 ms at frame 91, returning to -50 mV for 50 ms. Additionally, 0.4 seconds into the second and third stacks, the command voltage was changed from 0 mV to -50 mV for 50 ms. The study was supported in part by NIH 15R21EY034803 and NIH 1R21EY034258.",
- "tags": [
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 4820,
- "tag": "DANDI:000938"
- },
- {
- "id": 262,
- "tag": "Homo sapiens - Human"
- },
- {
- "id": 24,
- "tag": "NWB"
- }
- ],
- "timestamp_created": "2025-08-14 10:56:24.320926+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000938/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "3480": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
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- ],
- "default_context": "0.250207.0025",
- "id": 3480,
- "name": "Large-scale recordings of head direction cells in mouse postsubiculum",
- "repository_type": "dandi",
- "summary": "64-channel linear probe recordings from mouse postsubiculum (dorsal presubiculum) - a region in which most excitatory cells are narrowly tuned to the animal's head direction. Dataset includes one recording session per mouse (N = 31 mice, 42 - 185 units per recording). All sessions include a square open field exploration epoch and two sleep epochs. Some sessions additionally include a triangular open field epoch or an optogenetic stimulation epoch. \n\nEach NWB file contains: timestamps of detected units, mean waveforms, LFP, animal position and head-direction, sleep scoring (REM/NREM), accelerometer data. \n\nMetadata: https://docs.google.com/spreadsheets/d/1eGVMXkzyo25IOJHTyiNYFGhNO_7H4ZscUFfCBi31fYU/edit?usp=sharing\n\nData used in Duszkiewicz et al, 2024 (DOI: 10.1038/s41593-024-01588-5). Collected by Adrian J. Duszkiewicz and Sofia Skromne Carrasco in Peyrache lab. Additional adjustment of motion tracking data by Miao Wang, Sirota lab. \n\nOriginal version of the dataset used in the article (including ADN recordings) and code to reproduce figures can be found in Matlab format at:\nhttps://doi.org/10.6084/m9.figshare.24921252\n",
- "tags": [
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 4821,
- "tag": "DANDI:000939"
- },
- {
- "id": 194,
- "tag": "Mus musculus - House mouse"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 35,
- "tag": "electrophysiology"
- },
- {
- "id": 4822,
- "tag": "extracellular"
- },
- {
- "id": 4823,
- "tag": "freely-moving"
- },
- {
- "id": 4824,
- "tag": "head-direction"
- },
- {
- "id": 29,
- "tag": "mouse"
- },
- {
- "id": 4825,
- "tag": "postsubiculum"
- },
- {
- "id": 4826,
- "tag": "probe"
- }
- ],
- "timestamp_created": "2025-08-14 10:56:26.046957+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000939/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3481": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
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- "default_context": "draft",
- "id": 3481,
- "name": "Data for: Hippocampal Theta Phase Precession Supports Memory Formation and Retrieval of Naturalistic Experience in Humans",
- "repository_type": "dandi",
- "summary": "This repository contains the single neuron and local field potential recordings that underly the analysis of the paper: \n\nHippocampal Theta Phase Precession Supports Memory Formation and Retrieval of Naturalistic Experience in Humans. Jie Zheng, Mar Yebra, Andrea G.P. Schjetnan, Clayton Mosher, Suneil K. Kalia, Jeffrey M. Chung, Chrystal M. Reed, Taufik A. Valiante, Adam N. Mamelak, Gabriel Kreiman, Ueli Rutishauser. Nature Human Behavior, in press (2024).\n\nFurther information will be added upon publication.",
- "tags": [
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 4827,
- "tag": "DANDI:000940"
- },
- {
- "id": 262,
- "tag": "Homo sapiens - Human"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 18,
- "tag": "cognitive neuroscience"
- },
- {
- "id": 19,
- "tag": "data standardization"
- },
- {
- "id": 7,
- "tag": "human"
- },
- {
- "id": 516,
- "tag": "memory"
- },
- {
- "id": 22,
- "tag": "neurophysiology"
- },
- {
- "id": 25,
- "tag": "open source"
- },
- {
- "id": 4828,
- "tag": "phase precession"
- },
- {
- "id": 26,
- "tag": "single-neurons"
- }
- ],
- "timestamp_created": "2025-08-14 10:56:27.563284+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000940/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3482": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "0.241029.1405",
- "id": 3482,
- "name": "FALCON Benchmark M1-A: primary motor cortex recordings in primate during reach-to-grasp task",
- "repository_type": "dandi",
- "summary": "This dataset contains multiunit spiking times and behavioral data from a macaque performing a reach-to-grasp task. The experimental task was a center-out reaching task with four different objects in eight possible positions. Neural activity was recorded from electrode arrays implanted in primary motor cortex (M1). Electromyographical (EMG) activity was simultaneously recorded from upper limb muscles. Provided as part of the FALCON Benchmark: https://snel-repo.github.io/falcon/ \n\nThe datafile contains the following data in the acquisition fields: `preprocessed_emg` containing iEMG recordings from 16 muscles and `eval_mask` indicating within-trial periods used for evaluating performance in the FALCON Benchmark. Each datafile also includes spike times in the `units` field, and trial metadata for each reach and grasp (`gocue_time`, `move_onset_time`, `contact_time`, `reward_time`, `result`, `number`, `tgt_loc`, `tgt_obj`, `obj_id`, `condition_id`) in the `trials` field.\n\nAs part of the FALCON challenge, dataset files are released in three ways. The `held-in-calib` data includes many trials of data intended for calibration of decoders in the FALCON challenge. The `held-in-minival` data is a small subset of the `held-in-calib` data intended for FALCON models to validate submission format. Lastly, `held-out-calib` data are separate sessions of data from `held-in-calib`, but have much fewer trials, intended to be used for few-shot recalibration. Please bear in mind these factors if making use of this dataset for purposes outside of the FALCON Benchmark. Each dataset split is considered one \"subject\" by the DANDI repository; only data from one monkey is included.\n\nData from an additional monkey is available here: https://dandiarchive.org/dandiset/001209",
- "tags": [
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 4829,
- "tag": "DANDI:000941"
- },
- {
- "id": 210,
- "tag": "Macaca mulatta - Rhesus monkey"
- },
- {
- "id": 24,
- "tag": "NWB"
- }
- ],
- "timestamp_created": "2025-08-14 10:56:28.999219+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000941/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3483": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "0.240614.0754",
- "id": 3483,
- "name": "Clark and Nolan (2024) Task-anchored grid cell firing is selectively associated with successful path integration-dependent behaviour",
- "repository_type": "dandi",
- "summary": "This dataset contains electrophysiological recordings alongside the synchronised behavioural data for mice running in an open field and virtual linear track environments. Movable tetrodes were targeted to the medial entorhinal cortex. Further details can be found here (https://doi.org/10.7554/eLife.89356.2).",
- "tags": [
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 4830,
- "tag": "DANDI:000943"
- },
- {
- "id": 194,
- "tag": "Mus musculus - House mouse"
- },
- {
- "id": 24,
- "tag": "NWB"
- }
- ],
- "timestamp_created": "2025-08-14 10:56:30.423451+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000943/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3484": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "0.250711.1746",
- "id": 3484,
- "name": "Neural Spiking Data in the Awake Rat Somatosensory Cortex Responding to Trials of Transcranial Focused Ultrasound Stimulation",
- "repository_type": "dandi",
- "summary": "In these recordings, we tested different PRFs (pulse repetition frequencies) of ultrasound stimulation using a 128-element random array ultrasound transducer to stimulate the somatosensory cortex of awake head-fixed rats. Chronic electrophysiological recordings were acquired using 32-channel NeuroNexus electrodes (Model: A1x32-Poly3-10mm-50-177-Z32), chronically implanted into the rat brain. Ultrasound stimulation is delivered every 2.5 seconds with a 10% jitter, and each recording has 500 trials. The PRFs tested were 30 Hz, 300 Hz, 1500 Hz, 3000 Hz, and 4500 Hz, each with a 200 microsecond pulse duration and a 67 ms ultrasound duration. Anesthetized files were performed under 2% isoflurane anesthesia for comparison.File InformationAll 10 subjects were male rats, implanted with their chronic electrode at 6 months of age and then recordings taken first at 8-10 months, and then some repeats taken at 12 months. Within each subject's folder are recordings for the different PRFs. Most subjects have 5 recordings within, one for each PRF. Some subjects have duplicate recordings taken a few months after the original ones. A few recordings were not included due to excessive noise in the recordings. Files are named in the format SubjectName_PRF_PulseDuration. Each file contains spike time data with the cell type labels included for each neurons, as well as time series data for the onset of each trial of ultrasound stimulation. Detailed description about this dataset can be found in the following publication. Please cite the paper if you would use a portion of the dataset. Ramachandran, Sandhya et al. \u201cParameter-dependent cell-type specific effects of transcranial focused ultrasound stimulation in an awake head-fixed rodent model.\u201d Journal of neural engineering vol. 22,2 026022. 19 Mar. 2025, doi:10.1088/1741-2552/adbb1f",
- "tags": [
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 4831,
- "tag": "DANDI:000945"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 205,
- "tag": "Rattus norvegicus - Norway rat"
- }
- ],
- "timestamp_created": "2025-08-14 10:56:31.806090+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000945/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3485": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "0.250712.1549",
- "id": 3485,
- "name": "Neural Pathways Modulation in the Anesthetized Rat Elicited by Trials of Transcranial Focused Ultrasound Stimulation",
- "repository_type": "dandi",
- "summary": "In these recordings, we recorded neuronal activities from cortical-thalamocortical (CTC) pathway, including the somatosensory cortex (S1) and posteromedial complex (POm) of the thalamus responded to different PRFs (pulse repetition frequencies) or Pulse Durations (PDs) of transcranial ultrasound focused stimulation (tFUS) using a 128-element transducer to stimulate either at S1. Also, we tested the neural responses of the auditory cortex (AC) with tFUS targeting at S1. Recordings for each target are taken using 32-channel Neuronexus electrodes. Ultrasound stimulation is delivered every 2.5 seconds and each recording has 500 trials. The ultrasound duration and pressure level used in each recording is 67ms and ~90kPa. The PRFs and PDs for each recording can be found in the identifier field. For example, in BH494_1500_200_67_5, the PRF is 1500Hz and PD is 200us.Each recording contains two areas (64-channel). The spike time tiling coefficient (STTC) of neurons cross-area and within-area is included in the folders named with STTC. The detailed description on the data can be found in the following publication: Gao, H., Ramachandran, S., Yu, K., & He, B. (2025). Transcranial Focused Ultrasound Modulates Feedforward and Feedback Cortico-Thalamo-Cortical Pathways by Selectively Activating Excitatory Neurons. The Journal of Neuroscience, 45(23), e2218242025. https://doi.org/10.1523/JNEUROSCI.2218-24.2025. If you would use part of the dataset, please cite the above publication.",
- "tags": [
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 4832,
- "tag": "DANDI:000946"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 205,
- "tag": "Rattus norvegicus - Norway rat"
- }
- ],
- "timestamp_created": "2025-08-14 10:56:33.396686+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000946/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3486": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "0.240510.2211",
- "id": 3486,
- "name": "Reach-related Single Unit Activity in the Parkinsonian Macaque",
- "repository_type": "dandi",
- "summary": "This dataset contains recordings of single-unit activity from from multiple brain areas, including globus pallidus-internus (GPi), ventrolateral nucleus of the thalamus (VLa and VLp) and the arm-related regions of primary motor cortex, including sulcus (M1-S) and gyrus (M1-G) subregions, in monkeys performing a choice reaction time reaching task. Small numbers of recordings were also obtained from supplementary motor area (SMA), external globus pallidus (GPe), the thalamic reticular nucleus (RTN), striatum (STR) and the region between RTN and VL thalamus (R-V). It contains data from two monkeys before and after the administration of MPTP (1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine), which induces Parkinsonism. The neuronal activity was recorded using 16-contact linear probes (0.5\u20131.0 M\u03a9, V-probe, Plexon) or glass-insulated tungsten microelectrodes (0.5\u20131.5 M\u03a9, Alpha Omega). The neuronal data were amplified (4\u00d7, 2 Hz\u20137.5 kHz) and digitized at 24.414 kHz (approx., 16-bit resolution; Tucker Davis Technologies). The neuronal data were high-pass filtered (Fpass: 200 Hz, Matlab FIRPM) and thresholded, and candidate action potentials were sorted into clusters in principal components space (Off-line Sorter, Plexon or custom algorithm, TomSort, https://zenodo.org/doi/10.5281/zenodo.11176978).\n\nThe recordings for subject Isis before the administration of MPTP (pre-MPTP) were collected by Daisuke Kase.\nThe recordings for subject Isis after the administration of MPTP (post-MPTP) were collected by Yan Han (\u97e9\u598d).\nThe recordings for subject Gaia (pre-MPTP, post-MPTP) from 2015 were collected by Andrew J. Zimnik.\nThe recordings for subject Gaia (post-MPTP) from 2016-2017 were also collected by Daisuke Kase.",
- "tags": [
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 4833,
- "tag": "DANDI:000947"
- },
- {
- "id": 210,
- "tag": "Macaca mulatta - Rhesus monkey"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 4590,
- "tag": "Parkinson's disease"
- },
- {
- "id": 52,
- "tag": "extracellular electrophysiology"
- },
- {
- "id": 4834,
- "tag": "globus pallidus-internus"
- },
- {
- "id": 4835,
- "tag": "macaque"
- },
- {
- "id": 4836,
- "tag": "primary motor cortex"
- },
- {
- "id": 4837,
- "tag": "reaching"
- },
- {
- "id": 4838,
- "tag": "single-unit activity"
- },
- {
- "id": 4839,
- "tag": "ventrolateral thalamus"
- }
- ],
- "timestamp_created": "2025-08-14 10:56:34.850472+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000947/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3487": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "0.241029.1403",
- "id": 3487,
- "name": "FALCON Benchmark H2: Human Handwriting iBCI",
- "repository_type": "dandi",
- "summary": "The dataset contains neural activity from participant T5, who gave informed consent and was enrolled in the BrainGate2 Neural Interface System clinical trial (ClinicalTrials.gov Identifier: NCT00912041, registered June 3, 2009). This pilot clinical trial was approved under an Investigational Device Exemption (IDE) by the US Food and Drug Administration (Investigational Device Exemption #G090003). Permission was also granted by the Institutional Review Boards of Stanford University (protocol #20804). Data was recorded from two 96-channel intracortical electrode arrays in the hand \"knob\" area of of T5's left hemisphere precentral gyrus. On each trial, T5 was prompted to copy a cued sentence by writing individual characters, separated by a \">\" space character. Decoded letters appeared on the screen below the prompt.\n\nIn each datafile, the `acquisitions` field contains `binned_spikes` (binned at 20ms) and the `eval_mask` used for determining valid FALCON evaluation periods. The `trials` field contains trial metadata including the prompt that T5 was asked to attempt to write (`cue`) and the experimental block that each trial belongs to (`block_num`).\n\nAs part of the FALCON challenge, dataset files are released in three ways. The `held-in-calib` data includes many trials of data intended for calibration of decoders in the FALCON challenge. The `held-in-minival` data is a small subset of the `held-in-calib` data intended for FALCON models to validate submission format. Lastly, `held-out-calib` data are separate sessions of data from `held-in-calib`, but have much fewer trials, intended to be used for few-shot recalibration. Please bear in mind these factors if making use of this dataset for purposes outside of the FALCON Benchmark. Each dataset split is considered one \"subject\" by the DANDI repository; only data from one iBCI participant is included.",
- "tags": [
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 4840,
- "tag": "DANDI:000950"
- },
- {
- "id": 262,
- "tag": "Homo sapiens - Human"
- },
- {
- "id": 24,
- "tag": "NWB"
- }
- ],
- "timestamp_created": "2025-08-14 10:56:36.299537+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000950/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3488": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "0.240418.2218",
- "id": 3488,
- "name": "Dataset for Mapping model units to visual neurons reveals population code for social behavior",
- "repository_type": "dandi",
- "summary": "This is the dataset for the paper \"Mapping model units to visual neurons reveals population code for social behavior\" from Cowley et al., 2024. It contains 459 fruit fly courtship sessions, where 23 different LC neuron types have been silenced in male fruit flies. The data comprise raw camera recordings, processed SLEAP joint position tracks, song labels, male behavior, and reconstructed stimuli. The dataset also contains calcium imaging data of male flies for 5 different LC neuron types, including raw TIF images and processed dF/F responses.",
- "tags": [
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 4841,
- "tag": "DANDI:000951"
- },
- {
- "id": 274,
- "tag": "Drosophila melanogaster - Fruit fly"
- },
- {
- "id": 4842,
- "tag": "Drosophila, fruit fly, courtship, social behavior, genetic silencing, knockout, behavior, visual projection neuron, LC neuron, optic glomeruli, calcium imaging"
- },
- {
- "id": 24,
- "tag": "NWB"
- }
- ],
- "timestamp_created": "2025-08-14 10:56:37.830589+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000951/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3489": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "0.240731.1609",
- "id": 3489,
- "name": "32 CH local field potential recording of rodents performing a temporal discounting task",
- "repository_type": "dandi",
- "summary": "Local field potential (LFP) recordings from 12 male Long-Evans rats during a temporal discounting task. LFP was recording using an RHD interface board (Intantech) and Open Ephys recording software. Data was recorded at 1Khz, with a band-pass filter set at 0.3 to 999 Hz during acquisition. Physiology data was integrated with behavioral data using a lab-streaming-layer (LSL) protocol. Recordings are taken from 32 different brain areas. Subjects chose between a small (10uL/ 1s) reward delivered after a fixed short delay (500ms after response) or a large (30uL/3s) reward delivered after a fixed delay that varied from session to session (500ms, 1, 2, 5, 10, 20s). ",
- "tags": [
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 4843,
- "tag": "DANDI:000952"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 205,
- "tag": "Rattus norvegicus - Norway rat"
- }
- ],
- "timestamp_created": "2025-08-14 10:56:39.281386+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000952/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3490": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "draft",
- "id": 3490,
- "name": "FALCON Benchmark M2: primary motor cortex recordings in primate during finger movement",
- "repository_type": "dandi",
- "summary": "This dataset contains multiunit spiking times and behavioral data from a macaque in a finger movement task. The experimental task was to move two finger groups according to targets cued on a screen. Neural activity was recorded from electrode arrays implanted in primary motor cortex (M1). Finger positions as recorded by the manipulandum state, and normalized between full flexion and full extension, are provided. \n\nThis dataset is part of the FALCON benchmark: https://snel-repo.github.io/falcon. The datafile contains the following data in the acquisition fields: 2D kinematics (`finger_vel`) and metadata for FALCON evaluation (`eval_mask`). The datafile also contains multi-unit spiking activity in the `units` field.\n\nAs part of the FALCON challenge, dataset files are released in three ways. The held-in-calib data includes many trials of data intended for calibration of decoders in the FALCON challenge. The held-in-minival data is a small subset of the held-in-calib data intended for FALCON models to validate submission format. Lastly, held-out-calib data are separate sessions of data from held-in-calib, but have much fewer trials, intended to be used for few-shot recalibration. Please bear in mind these factors if making use of this dataset for purposes outside of the FALCON Benchmark. Each dataset split is considered one \"subject\" by the DANDI repository; only data from one monkey is included.",
- "tags": [
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 4844,
- "tag": "DANDI:000953"
- },
- {
- "id": 210,
- "tag": "Macaca mulatta - Rhesus monkey"
- },
- {
- "id": 24,
- "tag": "NWB"
- }
- ],
- "timestamp_created": "2025-08-14 10:56:40.671375+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000953/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3491": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "draft",
- "id": 3491,
- "name": "FALCON Benchmark H1: Human 7DoF Reach and Grasp Motor BCI",
- "repository_type": "dandi",
- "summary": "The dataset contains neural activity from a period of open loop calibration from a human participant with an intracortical brain computer interface. This data was collected under an Investigational\nDevice Exemption from the Food and Drug Administration and approved by the Institutional Review Board at the University of Pittsburgh (Pittsburgh, Pennsylvania), registered at ClinicalTrials.gov (NCT01894802). The clinical trial is an early feasibility study with a primary outcome of evaluating the safety of an intracortical brain\u2013computer interface for long-term neural recording and stimulation. Data was recorded from two 96-channel intracortical electrode arrays in the hand \"knob\" area . The 7DoF are: 3D endpoint translation (x,y,z) 1D orientation (roll), and 3D grasp (flex/ext of thumb, index, ring, flex/ext of ring/pinky, thumb abduction).\nOn each trial, audiovisual cues indicated to the participant to attempt a particular reach or grasp involving a combination of the listed degrees of freedom.\n\nThis dataset is part of the FALCON benchmark: https://snel-repo.github.io/falcon. The datafile contains the following data in the acquisition fields: 7D kinematics (`OpenLoopKinematics`), trial numbers (`TrialNum`), and metadata for FALCON evaluation (`eval_mask`, `Blacklist`). The datafile also contains multi-unit spiking activity in the `units` field.\n\nAs part of the FALCON challenge, dataset files are released in three ways. The held-in-calib data includes many trials of data intended for calibration of decoders in the FALCON challenge. The held-in-minival data is a small subset of the held-in-calib data intended for FALCON models to validate submission format. Lastly, held-out-calib data are separate sessions of data from held-in-calib, but have much fewer trials, intended to be used for few-shot recalibration. Please bear in mind these factors if making use of this dataset for purposes outside of the FALCON Benchmark. Each dataset split is considered one \"subject\" by the DANDI repository; only data from one iBCI participant is included.\n\nBy downloading this dataset, you are agreeing to terms of the following Data Use Agreement:\n- I will receive access to de-identified data and will not attempt to establish the identity of or attempt to contact any of the subjects.\n- I will not attempt to make direct contact with PIs, affiliated data partner PIs, or staff at sites concerning the specific results of individual subjects. Data partner PIs may be contacted about potential collaboration opportunities.\n- I will not further disclose these data beyond the uses outlined in this agreement and my data use application and understand that redistribution of data in any manner is prohibited.\n- I will require anyone on my team who utilizes these data or anyone with whom I share these data to comply with this Data Use Agreement.\n\n",
- "tags": [
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 4845,
- "tag": "DANDI:000954"
- },
- {
- "id": 262,
- "tag": "Homo sapiens - Human"
- },
- {
- "id": 24,
- "tag": "NWB"
- }
- ],
- "timestamp_created": "2025-08-14 10:56:42.106003+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000954/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3492": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "draft",
- "id": 3492,
- "name": "Neural Spiking Data in Rats Responding to Optogenetic Stimulation and Transcranial Focused Ultrasound Stimulation in the Somatosensory Cortex",
- "repository_type": "dandi",
- "summary": "In these recordings, we stimulate rats that were injected with AAV virus to optogenetically tag for CaMKII to distinguish between excitatory pyramidal neurons and inhibitory interneurons. We alternate between stimulating them optogenetically in order to tag the neuronal subtype and testing different PRFs (pulse repetition frequencies) and pulse durations of ultrasound stimulation using a 128-element random array ultrasound transducer to stimulate the somatosensory cortex. Electrophysiological recordings were acquired using 32-channel NeuroNexus electrodes (Model: A1x32-Poly3-10mm-50-177-A32), surgically inserted into the rat brain. Ultrasound stimulation is delivered every 2.5 seconds with a 10% jitter, and each recording has 500 trials. Optogenetic stimulation was delivered at 120A for 10ms. The PRFs tested were 30 Hz, 300 Hz, 1500 Hz, 3000 Hz, and 4500 Hz, with pulse durations including 4, 40, 200, and 400 microseconds, and a 67 millisecond ultrasound duration. \n\nFile Information: All subjects were male Wistar rats. Ultrasound test files are named in the format SubjectName_PRF_PulseDuration_UltrasoundDuration_Voltage. Optogenetics test files are named in the format SubjectName_opto_Current_Duration_OrderWithinUltrasoundPRFtests .Each file contains spike time data with the time series data for the onset of each trial of ultrasound stimulation or optogenetic stimulation.",
- "tags": [
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 4846,
- "tag": "DANDI:000955"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 205,
- "tag": "Rattus norvegicus - Norway rat"
- }
- ],
- "timestamp_created": "2025-08-14 10:56:43.553161+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000955/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3493": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "0.240731.0249",
- "id": 3493,
- "name": "Neuropixels Ultra Probe Imposed Motion Dataset",
- "repository_type": "dandi",
- "summary": "Neuropixels Ultra Probe Imposed Motion Dataset provides a dataset, where neural activity was recorded with Neuropixels Ultra (NP Ultra) in awake mouse visual cortex. NP Ultra probe measures neural activity at ultra-high density, with 6-micron center-to-center spacing between sites, in 8x48 site configuration (total width x length: 48 x 288 micron). \n\nProbe up-down motion was artificially imposed in the brain tissue during brain recording. A total of 10 steps forward and 9 alternating steps\nbackwards were imposed for each session, with 25 \u03bcm travel in each direction at 1 \u03bcm/sec speed. This results in 25 micron net displacement by the end of the imposed motion.\n\n118 natural images were presented at random times with repetition before and after imposed motion, for \"fingerprinting\" the identities of the visual cortical neurons with their unique visual responses.\n\nThis dataset provides an opportunity for designing and testing spike sorting algorithms, with neural activity sampled at an unprecedented spatiotemporal resolution.(1) Manually imposed motion and (2)neural identification with visual responses pre- and post- motion provide ground truth reference for testing the accuracy of motion correction and spike sorting.",
- "tags": [
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 4847,
- "tag": "DANDI:000957"
- },
- {
- "id": 194,
- "tag": "Mus musculus - House mouse"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 4848,
- "tag": "Neuropixels ultra, imposed motion, V1"
- }
- ],
- "timestamp_created": "2025-08-14 10:56:45.009756+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000957/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3494": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "draft",
- "id": 3494,
- "name": "Long-wavelength traveling waves of vasomotion modulate the perfusion of cortex",
- "repository_type": "dandi",
- "summary": "Brain arterioles are active, multi-cellular complexes whose diameters oscillate at ~ 0.1 Hz. We assess the physiological impact and spatiotemporal dynamics of vaso-oscillations in the awake mouse. First, vaso-oscillations in penetrating arterioles, which source blood from pial arterioles to the capillary bed, profoundly impact perfusion throughout neocortex. The modulation in flux during resting-state activity exceeds that of stimulus-induced activity. Second, the change in perfusion through arterioles relative to the change in their diameter is weak. This implies that the capillary bed dominates the hydrodynamic resistance of brain vasculature. Lastly, the phase of vaso-oscillations evolves slowly along arterioles, with a wavelength that exceeds the span of the cortical mantle and sufficient variability to establish functional cortical areas as parcels of uniform phase. The phase-gradient supports traveling waves in either direction along both pial and penetrating arterioles. This implies that waves along penetrating arterioles can mix, but not directionally transport, interstitial fluids.",
- "tags": [
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 4849,
- "tag": "DANDI:000970"
- },
- {
- "id": 194,
- "tag": "Mus musculus - House mouse"
- },
- {
- "id": 24,
- "tag": "NWB"
- }
- ],
- "timestamp_created": "2025-08-14 10:56:46.413997+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000970/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3495": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "0.240802.2004",
- "id": 3495,
- "name": "Dopamine signaling in the dorsomedial striatum promotes compulsive behavior",
- "repository_type": "dandi",
- "summary": "Compulsive behavior is a defining feature of disorders such as substance use disorders. Current evidence\nsuggests that corticostriatal circuits control the expression of established compulsions, but little is known\nabout the mechanisms regulating the development of compulsions. We hypothesized that dopamine, a critical modulator of striatal synaptic plasticity, could control alterations in corticostriatal circuits leading to the\ndevelopment of compulsions (defined here as continued reward seeking in the face of punishment). We used\ndual-site fiber photometry to measure dopamine axon activity in the dorsomedial striatum (DMS) and the\ndorsolateral striatum (DLS) as compulsions emerged. Individual variability in the speed with which compulsions emerged was predicted by DMS dopamine axon activity. Amplifying this dopamine signal accelerated\nanimals\u2019 transitions to compulsion, whereas inhibition delayed it. In contrast, amplifying DLS dopamine\nsignaling had no effect on the emergence of compulsions. These results establish DMS dopamine signaling\nas a key controller of the development of compulsive reward seeking.",
- "tags": [
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 4850,
- "tag": "DANDI:000971"
- },
- {
- "id": 194,
- "tag": "Mus musculus - House mouse"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 4851,
- "tag": "compulsive behavior"
- },
- {
- "id": 4852,
- "tag": "dopamine"
- },
- {
- "id": 4853,
- "tag": "dorsal striatum"
- },
- {
- "id": 4854,
- "tag": "fiber photometry"
- },
- {
- "id": 4855,
- "tag": "habit formation"
- },
- {
- "id": 17,
- "tag": "optogenetics"
- },
- {
- "id": 4856,
- "tag": "punishment-resistant reward seeking"
- },
- {
- "id": 4857,
- "tag": "reward learning"
- },
- {
- "id": 4858,
- "tag": "substantia nigra"
- }
- ],
- "timestamp_created": "2025-08-14 10:56:47.880018+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000971/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3496": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "0.240511.0307",
- "id": 3496,
- "name": "Single Day W-Track Learning",
- "repository_type": "dandi",
- "summary": "This dataset contains data from 8 animals (male Long Evans rats) learning a W-Track alternation task in a single day over 8 behavioral sessions (interleaved with sleep - 17 total epochs). Data includes position information (including velocity), spike times for dorsal CA1 and prefrontal single units, and local field potential.",
- "tags": [
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 4859,
- "tag": "DANDI:000978"
- },
- {
- "id": 457,
- "tag": "Electrophysiology"
- },
- {
- "id": 439,
- "tag": "Hippocampus"
- },
- {
- "id": 825,
- "tag": "Learning"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 398,
- "tag": "Prefrontal cortex"
- },
- {
- "id": 205,
- "tag": "Rattus norvegicus - Norway rat"
- },
- {
- "id": 592,
- "tag": "Sleep"
- }
- ],
- "timestamp_created": "2025-08-14 10:56:49.315647+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000978/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3497": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "draft",
- "id": 3497,
- "name": "Whole-brain chemosensory responses of both C. elegans sexes",
- "repository_type": "dandi",
- "summary": "Datasets for the preprint: https://www.biorxiv.org/content/10.1101/2025.05.15.654129v1.full",
- "tags": [
- {
- "id": 394,
- "tag": "Caenorhabditis elegans"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 4860,
- "tag": "DANDI:000981"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 4861,
- "tag": "NeuroPAL, whole-brain imaging, C. elegans, neural activity, sex, hermaphrodite, male"
- }
- ],
- "timestamp_created": "2025-08-14 10:56:50.718224+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000981/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3498": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "draft",
- "id": 3498,
- "name": "In vitro electrochemical impedance spectroscopy data - materials",
- "repository_type": "dandi",
- "summary": "Electrochemical impedance spectroscopy (EIS) data from multichannel microelectrode arrays coated with \npoly(3,4-ethylenedioxythiophene) (PEDOT),\nsputtered iridium oxide (SIROF),\n ruthenium oxide (RuOx),\nand Titanium nitride (TiN).\nThe project is supported by NIH 1U01NS126052-01.",
- "tags": [
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 4862,
- "tag": "DANDI:000983"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 4863,
- "tag": "PEDOT"
- },
- {
- "id": 4864,
- "tag": "RuOx"
- },
- {
- "id": 4865,
- "tag": "SIROF"
- },
- {
- "id": 4866,
- "tag": "TiN"
- },
- {
- "id": 4867,
- "tag": "Unidentified"
- }
- ],
- "timestamp_created": "2025-08-14 10:56:52.231891+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000983/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3499": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "draft",
- "id": 3499,
- "name": "Freely moving mouse retrosplenial cortex recordings",
- "repository_type": "dandi",
- "summary": "Data used in \"Hyperpolarization-Activated Currents Drive Neuronal Activation Sequences in Sleep\", available at https://www.biorxiv.org/content/10.1101/2023.09.12.557442v1. Dataset includes 14 recordings from 3 mice, with a total of 570 isolated units (31-71 units per recording). Collected by Sofia Skromne Carrasco in the Peyrache lab. Specifically, this data was used to generate Figure 5F.\n\nAll sessions include sleep epochs and open field exploration epochs. See the file metadata for more detailed information regarding each recording.\n\nEach NWB file contains: timestamps of detected units, LFP, animal position, head-direction, sleep scoring (REM/NREM) data as well as detected UP and DOWN states as used in the study.\n\nCode to reproduce figures in the article can be found at: https://github.com/PeyracheLab/MehrotraLevenstein_2023\n",
- "tags": [
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 4868,
- "tag": "DANDI:000987"
- },
- {
- "id": 194,
- "tag": "Mus musculus - House mouse"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 35,
- "tag": "electrophysiology"
- },
- {
- "id": 4822,
- "tag": "extracellular"
- },
- {
- "id": 4823,
- "tag": "freely-moving"
- },
- {
- "id": 29,
- "tag": "mouse"
- },
- {
- "id": 4826,
- "tag": "probe"
- },
- {
- "id": 4869,
- "tag": "retrosplenial"
- },
- {
- "id": 93,
- "tag": "sleep"
- }
- ],
- "timestamp_created": "2025-08-14 10:56:53.694890+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000987/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3500": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "draft",
- "id": 3500,
- "name": "Photophysics-informed two-photon voltage imaging using FRET-opsin voltage indicators",
- "repository_type": "dandi",
- "summary": "Voltage imaging from HEK cells, ex vivo mouse brain slice, and in vivo anaesthetized mouse barrel cortex.\nOne-photon photophysical exploration experiments, and two photon voltage sensitive recordings using Voltron1/2 and various dyes.",
- "tags": [
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 4870,
- "tag": "DANDI:000988"
- },
- {
- "id": 262,
- "tag": "Homo sapiens - Human"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 4871,
- "tag": "Voltage Imaging, Two-photon, Methods development"
- }
- ],
- "timestamp_created": "2025-08-14 10:56:55.288773+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000988/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3501": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "draft",
- "id": 3501,
- "name": "In vitro electrochemical impedance spectroscopy data - G1 and G2",
- "repository_type": "dandi",
- "summary": "Representative EIS data of G1 and G2 electrodes for all channels in this UO1 project.\nFor G1 electrodes, the relationship between the diameter of electrode contacts and the electrode number is as follows:\n5 (um): 2, 9, 16, 24\n10: 1, 11, 23, 31\n15: 8, 10, 22, 30\n20: 3, 15, 21, 25\n25: 6, 7, 12, 26\n30: 13, 18, 19, 27\n40: 4, 14, 20 28\n50: 5, 17, 29, 32\nFor G2 electrodes, the relationship between the diameter of electrode contacts and the electrode number is as follows:\n5 (um): 2, 3, 4, 5, 6, 7, 17, 18, 19, 20, 22\n10: 9, 12, 13, 14, 15, 16, 25, 26, 27, 28, 29, 32\ncircuit: 1-8, 11-30\nterminal: 23, 31\nreference (4004 um^2): 10, 24",
- "tags": [
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 4872,
- "tag": "DANDI:000989"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 4867,
- "tag": "Unidentified"
- },
- {
- "id": 4873,
- "tag": "ultramicroelectrode array"
- }
- ],
- "timestamp_created": "2025-08-14 10:56:56.821491+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/000989/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3502": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "0.240605.1826",
- "id": 3502,
- "name": "The impact of voltage on CANCAN focusing of electroporation using four-electrode arrays of varying sizes",
- "repository_type": "dandi",
- "summary": "The study examines the effect of pulse voltage on CANCAN focusing of electroporation using electrode arrays of different sizes. Adjustments in the amplitude of nanosecond electroporation pulses influenced the intensity of electroporation but did not alter its spatial characteristics across the electrode array. The study was supported in part by NIH R21EY034258",
- "tags": [
- {
- "id": 376,
- "tag": "Cricetulus griseus - Cricetulus aureus"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 4874,
- "tag": "DANDI:001025"
- },
- {
- "id": 24,
- "tag": "NWB"
- }
- ],
- "timestamp_created": "2025-08-14 10:56:58.269573+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/001025/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "3503": {
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- "default_context": "0.240605.1954",
- "id": 3503,
- "name": "CANCAN focusing of electroporation in 3D",
- "repository_type": "dandi",
- "summary": "Tips of electrodes in a quadrupole array were either in contact with cell monolayer (0 mm distance) or were placed 1, 2, or 3 mm above it. Packet 2 was applied 10 times, starting from each electrode, to a total of 40 packets delivered. The amplitude of the first pulse in the packet was 6.4 kV. Electroporation of the cells was evaluated using 1 uM YoPro-1 cell impermeable fluorescent dye. The study was supported in part by R21EY034258 from the National Eye Institute to A.G.P",
- "tags": [
- {
- "id": 376,
- "tag": "Cricetulus griseus - Cricetulus aureus"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 4875,
- "tag": "DANDI:001028"
- },
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- "id": 24,
- "tag": "NWB"
- }
- ],
- "timestamp_created": "2025-08-14 10:56:59.678537+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/001028/draft",
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- "email": "info@opensourcebrain.org",
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- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "default_context": "draft",
- "id": 3504,
- "name": "Depth dependence of 1P and 2P fluorescence",
- "repository_type": "dandi",
- "summary": "In vivo measurements of 1P and 2P fluorescence from JEDI-2P voltage indicator at depths ranging from the surface to 500 um.",
- "tags": [
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 4876,
- "tag": "DANDI:001029"
- },
- {
- "id": 4877,
- "tag": "JEDI-2P, fluorescence, depth, optical imaging, mouse brain"
- },
- {
- "id": 194,
- "tag": "Mus musculus - House mouse"
- },
- {
- "id": 24,
- "tag": "NWB"
- }
- ],
- "timestamp_created": "2025-08-14 10:57:01.142778+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/001029/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "default_context": "0.240520.1924",
- "id": 3505,
- "name": "High-frequency (2 kHz) sine wave stimulation of individual hippocampal neurons: the effect of electric field",
- "repository_type": "dandi",
- "summary": "2 kHz stimulation of hippocampal neurons under different amplitudes (measured as one polarity, V; peak-to-peak would be two-fold larger). Sine wave amplitude was gradually increased during the initial 0.25 s, then stayed constant at the voltage indicated in session descriptions. Sine wave stimulation begins at 25 ms and lasts 2 s. For the employed electrode configuration, 1V translates into 36 V/cm. Neuron action potentials were visualized using the voltage-sensitive fluorescent dye, FluoVolt. The study was supported in part by NIH 15R21EY034803.",
- "tags": [
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 4878,
- "tag": "DANDI:001030"
- },
- {
- "id": 194,
- "tag": "Mus musculus - House mouse"
- },
- {
- "id": 24,
- "tag": "NWB"
- }
- ],
- "timestamp_created": "2025-08-14 10:57:02.633720+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/001030/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "content_types": "experimental",
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- "default_context": "0.240520.1924",
- "id": 3506,
- "name": "High-frequency (100 kHz) rectangular bipolar pulses stimulation of individual hippocampal neurons: the effect of electric field",
- "repository_type": "dandi",
- "summary": "This dataset includes recordings of hippocampal neurons stimulated at 100 kHz under various amplitudes (measured as one polarity, V; the peak-to-peak value would be double this amount). Rectangular bipolar pulses were applied continuously for 2 seconds, beginning at 25 ms, with a 50% duty cycle. The pulse amplitude was constant at the indicated voltage. For the electrode configuration used, 1V corresponds to 36 V/cm. Neuron action potentials were visualized using the voltage-sensitive fluorescent dye, FluoVolt. This study was partially supported by NIH grant 15R21EY034803.",
- "tags": [
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 4879,
- "tag": "DANDI:001031"
- },
- {
- "id": 194,
- "tag": "Mus musculus - House mouse"
- },
- {
- "id": 24,
- "tag": "NWB"
- }
- ],
- "timestamp_created": "2025-08-14 10:57:04.029645+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/001031/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "content_types": "experimental",
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- "default_context": "0.240527.1432",
- "id": 3507,
- "name": "Characterization of Neuron Action Potential Triggering Using Sine Wave Electrostimulation at Varying Frequencies_part1",
- "repository_type": "dandi",
- "summary": "This experimental series aimed to characterize the triggering of action potentials (APs) in neurons using sine waves and modulated sine waves at varying frequencies. The experiments were conducted on E18 Sprague Dawley rat hippocampal neurons (BrainBits, Springfield, IL), employing the voltage-sensitive dye FluoVolt (Thermo Fisher Scientific, Waltham, MA) as the AP reporter.",
- "tags": [
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 4880,
- "tag": "DANDI:001032"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 205,
- "tag": "Rattus norvegicus - Norway rat"
- }
- ],
- "timestamp_created": "2025-08-14 10:57:05.454374+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/001032/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3508": {
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- "content_types": "experimental",
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- "default_context": "0.240527.1432",
- "id": 3508,
- "name": "Characterization of Neuron Action Potential Triggering Using Sine Wave Electrostimulation at Varying Frequencies_part2",
- "repository_type": "dandi",
- "summary": "This experimental series aimed to characterize the triggering of action potentials (APs) in neurons using sine waves and modulated sine waves at varying frequencies. The experiments were conducted on E18 Sprague Dawley rat hippocampal neurons (BrainBits, Springfield, IL), employing the voltage-sensitive dye FluoVolt (Thermo Fisher Scientific, Waltham, MA) as the AP reporter.",
- "tags": [
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 4881,
- "tag": "DANDI:001033"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 205,
- "tag": "Rattus norvegicus - Norway rat"
- }
- ],
- "timestamp_created": "2025-08-14 10:57:06.855578+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/001033/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3509": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
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- "default_context": "0.240527.1431",
- "id": 3509,
- "name": "Characterization of Neuron Action Potential Triggering Using Sine Wave Electrostimulation at Varying Frequencies_part3",
- "repository_type": "dandi",
- "summary": "This experimental series aimed to characterize the triggering of action potentials (APs) in neurons using sine waves and modulated sine waves at varying frequencies. The experiments were conducted on E18 Sprague Dawley rat hippocampal neurons (BrainBits, Springfield, IL), employing the voltage-sensitive dye FluoVolt (Thermo Fisher Scientific, Waltham, MA) as the AP reporter.",
- "tags": [
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 4882,
- "tag": "DANDI:001034"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 205,
- "tag": "Rattus norvegicus - Norway rat"
- }
- ],
- "timestamp_created": "2025-08-14 10:57:08.276091+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/001034/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3510": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
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- ],
- "default_context": "0.240527.1432",
- "id": 3510,
- "name": "Characterization of Neuron Action Potential Triggering Using Sine Wave Electrostimulation at Varying Frequencies_part4",
- "repository_type": "dandi",
- "summary": "This experimental series aimed to characterize the triggering of action potentials (APs) in neurons using sine waves and modulated sine waves at varying frequencies. The experiments were conducted on E18 Sprague Dawley rat hippocampal neurons (BrainBits, Springfield, IL), employing the voltage-sensitive dye FluoVolt (Thermo Fisher Scientific, Waltham, MA) as the AP reporter.",
- "tags": [
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 4883,
- "tag": "DANDI:001035"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 205,
- "tag": "Rattus norvegicus - Norway rat"
- }
- ],
- "timestamp_created": "2025-08-14 10:57:09.742786+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/001035/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3511": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "0.240816.1841",
- "id": 3511,
- "name": "Causal evidence of a line attractor encoding an affective state",
- "repository_type": "dandi",
- "summary": "This dataset provides neural and behavioural annotation data from the paper: \"Causal evidence of a line attractor encoding an affective state\". Data is stored in the NWB format and contains GCaMP traces, behavioural annotation (timing of behaviour), low-dimensional latent factors from dynamical models and other metadata.",
- "tags": [
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 4884,
- "tag": "DANDI:001037"
- },
- {
- "id": 194,
- "tag": "Mus musculus - House mouse"
- },
- {
- "id": 24,
- "tag": "NWB"
- }
- ],
- "timestamp_created": "2025-08-14 10:57:11.168515+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/001037/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3512": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "0.241111.1719",
- "id": 3512,
- "name": "Unique functional responses differentially map onto genetic subtypes of dopamine neurons",
- "repository_type": "dandi",
- "summary": "Dopamine neurons are characterized by their response to unexpected rewards, but they also fire during movement and aversive stimuli. Dopamine neuron diversity has been observed based on molecular expression profiles; however, whether different functions map onto such genetic subtypes remains unclear. In this study, we established that three genetic dopamine neuron subtypes within the substantia nigra pars compacta, characterized by the expression of Slc17a6 (Vglut2), Calb1 and Anxa1, each have a unique set of responses to rewards, aversive stimuli and accelerations and decelerations, and these signaling patterns are highly correlated between somas and axons within subtypes. Remarkably, reward responses were almost entirely absent in the Anxa1+ subtype, which instead displayed acceleration-correlated signaling. Our findings establish a connection between functional and genetic dopamine neuron subtypes and demonstrate that molecular expression patterns can serve as a common framework to dissect dopaminergic functions.",
- "tags": [
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 4885,
- "tag": "DANDI:001038"
- },
- {
- "id": 4886,
- "tag": "Dopamine"
- },
- {
- "id": 4887,
- "tag": "Fiber photometry"
- },
- {
- "id": 4888,
- "tag": "GCaMP6f"
- },
- {
- "id": 194,
- "tag": "Mus musculus - House mouse"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 4889,
- "tag": "striatum"
- },
- {
- "id": 4890,
- "tag": "substantia nigra pars compacta"
- }
- ],
- "timestamp_created": "2025-08-14 10:57:12.727998+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/001038/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3513": {
- "auto_sync": true,
- "content_types": "experimental",
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- "default_context": "0.240905.0159",
- "id": 3513,
- "name": "Dataset of long-term multi-site LFP activity with spontaneous chronic seizures recorded in temporal lobe epilepsy rats.",
- "repository_type": "dandi",
- "summary": "We provided a long-term brain electrophysiological dataset of 15 pilocarpine-treated temporal lobe epilepsy (TLE) rats during the development of epilepsy. The dataset was constituted by multi-site local field potential (LFP) signal recorded from 12 sites in the circuit of Papez in TLE, including spontaneous seizures and interictal fragments in the chronic period. The LFP data were saved in MATLAB, stored as the Neurodata Without Borders (NWB) standard, and published on the DANDI Archive. The dataset can be used to evaluate the alterations of seizure onset zone (SOZ), seizure onset pattern (SOP), and functional network connectivity during the development of epilepsy. We have technically validated the dataset through histology and specific signal analysis. In addition, we provided MATLAB codes for basic analyses of this dataset, including power spectral analysis, SOP identification, and interictal spike detection. The dataset is available to reveal how brain electrophysiological and epileptic network properties of chronic TLE rats change from early to late stages, and help inform the design of adaptive neuromodulation for epilepsy.",
- "tags": [
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 4891,
- "tag": "DANDI:001044"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 205,
- "tag": "Rattus norvegicus - Norway rat"
- },
- {
- "id": 4892,
- "tag": "local field potential"
- },
- {
- "id": 4893,
- "tag": "multi-site"
- },
- {
- "id": 22,
- "tag": "neurophysiology"
- },
- {
- "id": 23,
- "tag": "neurosurgery"
- },
- {
- "id": 4894,
- "tag": "spontaneous seizure"
- },
- {
- "id": 4895,
- "tag": "temporal lobe epilepsy"
- }
- ],
- "timestamp_created": "2025-08-14 10:57:14.160173+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/001044/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3514": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "0.250607.0101",
- "id": 3514,
- "name": "Comparison of Fluid Flow In the Pial Perivascular Spaces of Rats and Mice",
- "repository_type": "dandi",
- "summary": "This data includes several visualizations of five different rat\u2019s pial perivascular spaces. It includes videos of fluid motion and z-stacks of arteries and perivascular spaces. These images were acquired using a two-photon microscope.",
- "tags": [
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 4896,
- "tag": "DANDI:001045"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 205,
- "tag": "Rattus norvegicus - Norway rat"
- },
- {
- "id": 4897,
- "tag": "cerebrospinal fluid"
- },
- {
- "id": 4898,
- "tag": "glymphatic"
- },
- {
- "id": 4899,
- "tag": "periarterial space"
- },
- {
- "id": 4900,
- "tag": "perivascular space"
- }
- ],
- "timestamp_created": "2025-08-14 11:10:10.916616+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/001045/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "3515": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "draft",
- "id": 3515,
- "name": "FALCON Benchmark B1: zebra finch RA Neuropixels recordings during birdsong",
- "repository_type": "dandi",
- "summary": "The B1 dataset contains unsorted spike times, audio recordings, and audio spectrograms from a zebra finch songbird during natural vocal behavior. Neural activity was recorded using Neuropixels probes from premotor and motor nuclei. We provide precomputed spectrograms for each session. The raw audio is also provided.\n\nIn each datafile we provide the following as `acquisitions`: `tx` (threshold crossings at the full 30kHz resolution), `vocalizations` (the full sampling rate vocal recordings), `eval_mask_audio` (the mask for FALCON evaluation periods to be applied to the vocalizations). We also provide the following in the `trials` field: `spectrogram_times`, `spectrogram_frequencies`, `spectrogram_values`, and `spectrogram_eval_mask`. The spectrogram comprises the FALCON decoding target for this dataset.\n\nAs part of the FALCON challenge, dataset files are released in three ways. The `held-in-calib` data includes many trials of data intended for calibration of decoders in the FALCON challenge. The `held-in-minival` data is a small subset of the `held-in-calib` data intended for FALCON models to validate submission format. Lastly, `held-out-calib` data are separate sessions of data from `held-in-calib`, but have much fewer trials, intended to be used for few-shot recalibration. Please bear in mind these factors if making use of this dataset for purposes outside of the FALCON Benchmark. Each dataset split is considered one \"subject\" by the DANDI repository; only data from one songbird is included.\n\nBroadband data corresponding to each dataset split can be found: https://dandiarchive.org/dandiset/001245",
- "tags": [
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 4901,
- "tag": "DANDI:001046"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 4902,
- "tag": "Taeniopygia guttata - Zebra finch"
- }
- ],
- "timestamp_created": "2025-08-14 11:10:12.379998+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/001046/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3516": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "0.250701.1609",
- "id": 3516,
- "name": "Optimizing NG-CanCan Protocol Delivery with MHz Compression to Minimize Near-Electrode Ablation",
- "repository_type": "dandi",
- "summary": "This study advanced the Next Generation (NG) CanCan protocols by implementing MHz compression for electric pulse packet delivery. Packets were delivered at 0.2 MHz, and the compression significantly reduced near-electrode cell ablation compared to delivery at 1 Hz, while preserving effects at the center. The experiments used a four-electrode array, with YoPro-1 to evaluate cell permeabilization and Propidium Iodide to assess cell death two hours post-delivery. This work was supported by NIH grant 1R21EY034258.",
- "tags": [
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 4903,
- "tag": "DANDI:001047"
- },
- {
- "id": 194,
- "tag": "Mus musculus - House mouse"
- },
- {
- "id": 24,
- "tag": "NWB"
- }
- ],
- "timestamp_created": "2025-08-14 11:10:13.834707+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/001047/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3517": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "0.250701.1624",
- "id": 3517,
- "name": "Plasma membrane conductance changes in response to supraphysiological hyperpolarization",
- "repository_type": "dandi",
- "summary": "This study aimed to visualize and characterize membrane lesions caused by hyperpolarization and their protective roles against membrane overcharging. We identified three types of lesions in HEK cells, each with distinct characteristics. Hyperpolarization to specific voltages created diffuse zonal electropermeabilization, focal pores, and high-conductance pores, with adaptive conductance changes preventing membrane rupture. This study was partially supported by NIH grants 1R21EY034258 and 5R21EY034803.",
- "tags": [
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 4904,
- "tag": "DANDI:001048"
- },
- {
- "id": 262,
- "tag": "Homo sapiens - Human"
- },
- {
- "id": 24,
- "tag": "NWB"
- }
- ],
- "timestamp_created": "2025-08-14 11:10:15.363941+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/001048/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3518": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "draft",
- "id": 3518,
- "name": "Large-scale Neuropixels recordings through SHIELD implant during visual change detection task with dynamic gating of engagement",
- "repository_type": "dandi",
- "summary": "This dataset was collected at the Allen Institute. It includes data from 99 electrophysiology sessions featuring multi-Neuropixel recordings throughout the left hemisphere while mice performed a visual change detection task. This dataset is closely related to the Allen Institute Visual Behavior Neuropixels (VBN) dataset, but differs in two important ways: \nFirst, whereas the VBN recordings were focused on visual cortical areas and underlying subcortical regions, this dataset features recordings from throughout the left hemisphere, including frontal and medial cortical areas and the striatum. \nSecond, we have modified the behavioral task for this dataset to experimentally manipulate task engagement. During the VBN recordings, an hour of active behavior was followed by a passive behavior block during which the lick spout was retracted and mice were presented with the same visual stimuli but now with no opportunity to lick for reward. In practice, mice often satiated before the passive block. For this dataset, we interposed a 'no-reward' block in the middle of active behavior. During this new epoch, the lick spout remained extended but licks for visual changes no longer triggered reward. At the end of the no-reward block, auto-rewards were given to indicate that rewards were once again available, and many mice resumed licking for changes.\n\nTo better understand how to access and analyze this dataset, we encourage potential users to refer to the resources below. The data in DANDI is structured as follows: each subject has session NWBs identified by date of acquisition. Then, there are LFP NWBs for up to 6 probes for each session, identified by a probe id. For the LFP, each session NWB has a probes table that has the probe ids for the LFP data associated with that session. Use this table to get the probe ids and corresponding LFP NWBs. Examples of opening a NWB file and accessing the probes table can be seen at the GitHub below under tutorials. In addition, there is a dynamic gating sessions metadata table at the GitHub repository below that has an acquisition date column, which can be used to map to a session id (the session column in the metadata tables). This will be useful for parsing the metadata tables for multi-session analysis.\n\n1) This repository includes a quick-start tutorial notebook as well as metadata tables for the sessions, probes, channels and units included in this dataset: https://github.com/AllenInstitute/SHIELD_Dynamic_Gating_Analysis\n2) To learn more about the basic visual change detection task as well as the general structure of the nwb files, consult the documentation available for the Allen Observatory Visual Behavior Neuropixels dataset here: https://portal.brain-map.org/circuits-behavior/visual-behavior-neuropixels\n\nThis dataset was used in the following preprint: \nSHIELD: Skull-shaped hemispheric implants enabling large-scale-electrophysiology datasets in the mouse brain [https://doi.org/10.1101/2023.11.12.566771]",
- "tags": [
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 4905,
- "tag": "DANDI:001051"
- },
- {
- "id": 194,
- "tag": "Mus musculus - House mouse"
- },
- {
- "id": 24,
- "tag": "NWB"
- }
- ],
- "timestamp_created": "2025-08-14 11:10:16.877735+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/001051/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3519": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "0.240610.1814",
- "id": 3519,
- "name": "Acute Random and FixedBurst stim in MFB and mPFC using Neuropixels in NAc",
- "repository_type": "dandi",
- "summary": "Anesthetized rats - recording effects of stim on NAc ensemble activity \nFunded by BRAIN Initiative NS123424-01",
- "tags": [
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 4906,
- "tag": "DANDI:001052"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 205,
- "tag": "Rattus norvegicus - Norway rat"
- },
- {
- "id": 4907,
- "tag": "nucleus accumbens, ensemble"
- }
- ],
- "timestamp_created": "2025-08-14 11:10:18.329350+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/001052/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3520": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "0.240701.1903",
- "id": 3520,
- "name": "Hippocampal stimulation during temporal lobe seizure",
- "repository_type": "dandi",
- "summary": "Four non-human primates were used for this study in two contemporaneous cohorts. One cohort (n=3 hemispheres) was implanted with the Medtronic RC+S stimulation (GIN cohort) and recording system connected to two 4-contact ring electrodes to evaluate three unilateral stimulation patterns: 7 Hz Ring ADMES, 20 Hz Dual Ring, and 125 Hz Dual Ring (analog of clinical stimulation). In an additional cohort (EPC cohort, n=2), two 12-contact segmented electrodes were implanted in the right hippocampus and connected to an externalized recording and stimulation system to allow more flexibility in the stimulation pattern. In this second cohort, 4 variations of stimulation were evaluated (7 Hz Full ADMES, 7 Hz Ring ADMES, 31 Hz Wide Ring, and 31 Hz Dual Ring). ",
- "tags": [
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 4908,
- "tag": "DANDI:001054"
- },
- {
- "id": 210,
- "tag": "Macaca mulatta - Rhesus monkey"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 4909,
- "tag": "temporal lobe seizure, asynchronous stimulation, hippocampal stimulation"
- }
- ],
- "timestamp_created": "2025-08-14 11:10:19.868777+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/001054/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3521": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "draft",
- "id": 3521,
- "name": "NeuroTask - Random Target: A Benchmark Dataset for Multi-Task, -Session and -Subject Neural Analysis",
- "repository_type": "dandi",
- "summary": "NeuroTask is a benchmark dataset designed to facilitate the development of accurate and efficient methods for analyzing multi-session, multi-task, and multi-subject neural data. NeuroTask integrates 6 datasets from motor cortical regions, covering 7 tasks across 17 subjects.\n\nCheck out the github repository for more resources and some example notebooks:https://github.com/catniplab/NeuroTask/tree/nwb\n\nThis dataset includes:\n- Spike counts per unit\n- Behavioral data (hand/cursor position, velocity, force)\n- Events indications\n\n\n",
- "tags": [
- {
- "id": 4910,
- "tag": "Benchmark"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 4911,
- "tag": "DANDI:001055"
- },
- {
- "id": 210,
- "tag": "Macaca mulatta - Rhesus monkey"
- },
- {
- "id": 78,
- "tag": "Macaque"
- },
- {
- "id": 48,
- "tag": "Motor cortex"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 4912,
- "tag": "Random Target"
- },
- {
- "id": 4913,
- "tag": "Reaching"
- }
- ],
- "timestamp_created": "2025-08-14 11:10:21.344050+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/001055/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3522": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "draft",
- "id": 3522,
- "name": "NeuroTask - Center-Out with bump: A Benchmark Dataset for Multi-Task, -Session and -Subject Neural Analysis",
- "repository_type": "dandi",
- "summary": "NeuroTask is a benchmark dataset designed to facilitate the development of accurate and efficient methods for analyzing multi-session, multi-task, and multi-subject neural data. NeuroTask integrates 6 datasets from motor cortical regions, covering 7 tasks across 17 subjects.\n\nCheck out the github repository for more resources and some example notebooks:https://github.com/catniplab/NeuroTask/tree/nwb\n\nThis dataset includes:\n- Spike counts per unit\n- Behavioral data (hand/cursor position, velocity, force)\n- Events indications\n",
- "tags": [
- {
- "id": 4910,
- "tag": "Benchmark"
- },
- {
- "id": 4914,
- "tag": "Bump"
- },
- {
- "id": 4915,
- "tag": "Center Out"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 4916,
- "tag": "DANDI:001056"
- },
- {
- "id": 210,
- "tag": "Macaca mulatta - Rhesus monkey"
- },
- {
- "id": 4917,
- "tag": "Monkey"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 4913,
- "tag": "Reaching"
- }
- ],
- "timestamp_created": "2025-08-14 11:10:22.754699+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/001056/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3523": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "draft",
- "id": 3523,
- "name": "NeuroTask - Center-Out Target Task: A Benchmark Dataset for Multi-Task, -Session and -Subject Neural Analysis",
- "repository_type": "dandi",
- "summary": "NeuroTask is a benchmark dataset designed to facilitate the development of accurate and efficient methods for analyzing multi-session, multi-task, and multi-subject neural data. NeuroTask integrates 6 datasets from motor cortical regions, covering 7 tasks across 19 subjects.\n\nCheck out the github repository for more resources and some example notebooks:https://github.com/catniplab/NeuroTask\n\nThis dataset includes:\n- Spike counts per unit\n- Behavioral data (hand/cursor position, velocity, force)\n- Events indications",
- "tags": [
- {
- "id": 4918,
- "tag": "Behavior"
- },
- {
- "id": 4915,
- "tag": "Center Out"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 4919,
- "tag": "DANDI:001057"
- },
- {
- "id": 210,
- "tag": "Macaca mulatta - Rhesus monkey"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 4913,
- "tag": "Reaching"
- },
- {
- "id": 4822,
- "tag": "extracellular"
- },
- {
- "id": 28,
- "tag": "motor cortex"
- },
- {
- "id": 4920,
- "tag": "premotor cortex"
- }
- ],
- "timestamp_created": "2025-08-14 11:10:24.280369+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/001057/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3524": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "draft",
- "id": 3524,
- "name": "NeuroTask - Two Workspace Random Target: A Benchmark Dataset for Multi-Task, -Session and -Subject Neural Analysis",
- "repository_type": "dandi",
- "summary": "NeuroTask is a benchmark dataset designed to facilitate the development of accurate and efficient methods for analyzing multi-session, multi-task, and multi-subject neural data. NeuroTask integrates 6 datasets from motor cortical regions, covering 7 tasks across 17 subjects.\nCheck out the github repository for more resources and some example notebooks: https://github.com/catniplab/NeuroTask/tree/nwb\n\nThis dataset includes:\n- Spike counts per unit\n- Behavioral data (hand/cursor position, velocity, force)\n- Events indications\n",
- "tags": [
- {
- "id": 4910,
- "tag": "Benchmark"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 4921,
- "tag": "DANDI:001058"
- },
- {
- "id": 210,
- "tag": "Macaca mulatta - Rhesus monkey"
- },
- {
- "id": 4917,
- "tag": "Monkey"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 4912,
- "tag": "Random Target"
- },
- {
- "id": 4913,
- "tag": "Reaching"
- }
- ],
- "timestamp_created": "2025-08-14 11:10:25.735629+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/001058/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3525": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "draft",
- "id": 3525,
- "name": "NeuroTask - Key Grasp: A Benchmark Dataset for Multi-Task, -Session and -Subject Neural Analysis",
- "repository_type": "dandi",
- "summary": "NeuroTask is a benchmark dataset designed to facilitate the development of accurate and efficient methods for analyzing multi-session, multi-task, and multi-subject neural data. NeuroTask integrates 6 datasets from motor cortical regions, covering 7 tasks across 17 subjects.\nCheck out the github repository for more resources and some example notebooks: https://github.com/catniplab/NeuroTask/tree/nwb\n\nThis dataset includes:\n- Spike counts per unit\n- Behavioral data (hand/cursor position, velocity, force)\n- Events indications\n",
- "tags": [
- {
- "id": 4918,
- "tag": "Behavior"
- },
- {
- "id": 4910,
- "tag": "Benchmark"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 4922,
- "tag": "DANDI:001059"
- },
- {
- "id": 4923,
- "tag": "Grasp"
- },
- {
- "id": 4924,
- "tag": "Key Grasp"
- },
- {
- "id": 210,
- "tag": "Macaca mulatta - Rhesus monkey"
- },
- {
- "id": 4917,
- "tag": "Monkey"
- },
- {
- "id": 24,
- "tag": "NWB"
- }
- ],
- "timestamp_created": "2025-08-14 11:10:27.210407+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/001059/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3526": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "draft",
- "id": 3526,
- "name": "NeuroTask - Isometric Wrist Task: A Benchmark Dataset for Multi-Task, -Session and -Subject Neural Analysis",
- "repository_type": "dandi",
- "summary": "NeuroTask is a benchmark dataset designed to facilitate the development of accurate and efficient methods for analyzing multi-session, multi-task, and multi-subject neural data. NeuroTask integrates 6 datasets from motor cortical regions, covering 7 tasks across 17 subjects.\n\nCheck out the github repository for more resources and some example notebooks: https://github.com/catniplab/NeuroTask/tree/nwb\n\nThis dataset includes:\n- Spike counts per unit\n- Behavioral data (hand/cursor position, velocity, force)\n- Events indications",
- "tags": [
- {
- "id": 4925,
- "tag": "Bahavior"
- },
- {
- "id": 4910,
- "tag": "Benchmark"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 4926,
- "tag": "DANDI:001060"
- },
- {
- "id": 4927,
- "tag": "Isometric"
- },
- {
- "id": 210,
- "tag": "Macaca mulatta - Rhesus monkey"
- },
- {
- "id": 4917,
- "tag": "Monkey"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 4928,
- "tag": "Wrist"
- }
- ],
- "timestamp_created": "2025-08-14 11:10:28.596208+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/001060/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3527": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "draft",
- "id": 3527,
- "name": "Marmoset electrophysiology and kinematics during prey capture (monkey MG)",
- "repository_type": "dandi",
- "summary": "Electrophysiology recorded from a 96-channel Utah array implanted in primary motor and somotasensory cortex of the common marmoset. The file also contains kinematics of the hand, elbow, wrist, and head as the marmoset engaged in a naturalistic prey capture task with live moths. This is the processed version of the data, which contains spike-sorted electrophysiology and quantified kinematics (processed by DeepLabCut and Anipose). ",
- "tags": [
- {
- "id": 4929,
- "tag": "Callithrix jacchus - Common marmoset"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 4930,
- "tag": "DANDI:001062"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 4931,
- "tag": "marmoset electrophysiology"
- }
- ],
- "timestamp_created": "2025-08-14 11:10:29.999512+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/001062/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3528": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "0.250125.0601",
- "id": 3528,
- "name": "Broken time reversal symmetry in motion detection",
- "repository_type": "dandi",
- "summary": "Our intuition suggests that when a movie is played in reverse, our perception of motion in the reversed movie will be perfectly inverted compared to the original. This intuition is also reflected in many classical theoretical and practical models of motion detection. However, here we demonstrate that this symmetry of motion perception upon time reversal is often broken in real visual systems. In this work, we designed a set of visual stimuli to investigate how stimulus symmetries affect time reversal symmetry breaking in the fruit fly Drosophila\u2019s well-studied optomotor rotation behavior. We discovered a suite of new stimuli with a wide variety of different properties that can lead to broken time reversal symmetries in fly behavioral responses. We then trained neural network models to predict the velocity of scenes with both natural and artificial contrast distributions. Training with naturalistic contrast distributions yielded models that break time reversal symmetry, even when the training data was time reversal symmetric. We show analytically and numerically that the breaking of time reversal symmetry in the model responses can arise from contrast asymmetry in the training data, but can also arise from other features of the contrast distribution. Furthermore, shallower neural network models can exhibit stronger symmetry breaking than deeper ones, suggesting that less flexible neural networks promote some forms of time reversal symmetry breaking. Overall, these results reveal a surprising feature of biological motion detectors and suggest that it could arise from constrained optimization in natural environments.",
- "tags": [
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 4932,
- "tag": "DANDI:001063"
- },
- {
- "id": 274,
- "tag": "Drosophila melanogaster - Fruit fly"
- },
- {
- "id": 24,
- "tag": "NWB"
- }
- ],
- "timestamp_created": "2025-08-14 11:10:31.434499+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/001063/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3529": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "draft",
- "id": 3529,
- "name": "Broken time reversal symmetry in motion detection",
- "repository_type": "dandi",
- "summary": "Our intuition suggests that when a movie is played in reverse, our perception of motion in the reversed movie will be perfectly inverted compared to the original. This intuition is also reflected in many classical theoretical and practical models of motion detection. However, here we demonstrate that this symmetry of motion perception upon time reversal is often broken in real visual systems. In this work, we designed a set of visual stimuli to investigate how stimulus symmetries affect time reversal symmetry breaking in the fruit fly Drosophila\u2019s well-studied optomotor rotation behavior. We discovered a suite of new stimuli with a wide variety of different properties that can lead to broken time reversal symmetries in fly behavioral responses. We then trained neural network models to predict the velocity of scenes with both natural and artificial contrast distributions. Training with naturalistic contrast distributions yielded models that break time reversal symmetry, even when the training data was time reversal symmetric. We show analytically and numerically that the breaking of time reversal symmetry in the model responses can arise from contrast asymmetry in the training data, but can also arise from other features of the contrast distribution. Furthermore, shallower neural network models can exhibit stronger symmetry breaking than deeper ones, suggesting that less flexible neural networks promote some forms of time reversal symmetry breaking. Overall, these results reveal a surprising feature of biological motion detectors and suggest that it could arise from constrained optimization in natural environments.",
- "tags": [
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 4933,
- "tag": "DANDI:001064"
- },
- {
- "id": 274,
- "tag": "Drosophila melanogaster - Fruit fly"
- },
- {
- "id": 24,
- "tag": "NWB"
- }
- ],
- "timestamp_created": "2025-08-14 11:10:32.826973+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/001064/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3530": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "0.241028.1559",
- "id": 3530,
- "name": "Areal specializations in the morpho-electric and transcriptomic properties of layer 5 extratelencephalic-projecting neurons in the primate neocortex",
- "repository_type": "dandi",
- "summary": "Electrophysiology dataset associated with journal article titled areal specializations in the morpho-electric and transcriptomic properties of layer 5 extratelencephalic-projecting neurons in the primate neocortex. NWB files contains current clamp data collected for analysis of deep layer 5 ET neurons in the primate temporal and motor cortical regions. ",
- "tags": [
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 4934,
- "tag": "DANDI:001065"
- },
- {
- "id": 210,
- "tag": "Macaca mulatta - Rhesus monkey"
- },
- {
- "id": 24,
- "tag": "NWB"
- }
- ],
- "timestamp_created": "2025-08-14 11:10:34.301613+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/001065/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3531": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "0.240621.2139",
- "id": 3531,
- "name": "SN recording during Temporal lobe seizures",
- "repository_type": "dandi",
- "summary": "This data set contains the electrophysiological recordings from 2 NHPs during temporal lobe seizures induced by penicillin injection into the hippocampus. ",
- "tags": [
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 4935,
- "tag": "DANDI:001069"
- },
- {
- "id": 210,
- "tag": "Macaca mulatta - Rhesus monkey"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 4936,
- "tag": "basal ganglia, SNr, SN, TLE, temporal lobe seizure, Non-human primate, seizure onset, penicillin"
- }
- ],
- "timestamp_created": "2025-08-14 11:10:35.866778+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/001069/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3532": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "draft",
- "id": 3532,
- "name": "LITMUS: Rat-based simulated motor unit dataset with 3 levels of waveform shape variability",
- "repository_type": "dandi",
- "summary": "Three synthetic datasets based on real multi-channel intramuscular recordings of motor unit action potentials from 10 unique motor units with high SNR (200-250). Each dataset has 8 channels and is 10 minutes long. Although low background noise was observed, waveform shapes were observed to have an inherent shape variability, so this Dandiset provides three different levels of waveform shape noise variability: 0, 2, and 4 STD (computed from the Kilosort spatial template matrix).",
- "tags": [
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 4937,
- "tag": "DANDI:001073"
- },
- {
- "id": 4938,
- "tag": "EMG"
- },
- {
- "id": 4939,
- "tag": "EMUsort"
- },
- {
- "id": 4940,
- "tag": "LITMUS"
- },
- {
- "id": 4941,
- "tag": "MUsim"
- },
- {
- "id": 4942,
- "tag": "Motor Unit"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 121,
- "tag": "Rat"
- },
- {
- "id": 205,
- "tag": "Rattus norvegicus - Norway rat"
- },
- {
- "id": 4943,
- "tag": "SNEL"
- }
- ],
- "timestamp_created": "2025-08-14 11:10:37.392636+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/001073/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3533": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "0.240930.1859",
- "id": 3533,
- "name": "Neural signal propagation atlas of Caenorhabditis elegans",
- "repository_type": "dandi",
- "summary": "The dataset used in the paper \"Randi, F., Sharma, A.K., Dvali, S. et al. Neural signal propagation atlas of Caenorhabditis elegans. Nature 623, 406\u2013414 (2023).\"\n\nEstablishing how neural function emerges from network properties is a fundamental problem in neuroscience. Here, to better understand the relationship between the structure and the function of a nervous system, we systematically measure signal propagation in 23,433 pairs of neurons across the head of the nematode Caenorhabditis elegans by direct optogenetic activation and simultaneous whole-brain calcium imaging. We measure the sign (excitatory or inhibitory), strength, temporal properties and causal direction of signal propagation between these neurons to create a functional atlas. We find that signal propagation differs from model predictions that are based on anatomy. Using mutants, we show that extrasynaptic signalling not visible from anatomy contributes to this difference. We identify many instances of dense-core-vesicle-dependent signalling, including on timescales of less than a second, that evoke acute calcium transients\u2014often where no direct wired connection exists but where relevant neuropeptides and receptors are expressed. We propose that, in such cases, extrasynaptically released neuropeptides serve a similar function to that of classical neurotransmitters. Finally, our measured signal propagation atlas better predicts the neural dynamics of spontaneous activity than do models based on anatomy. We conclude that both synaptic and extrasynaptic signalling drive neural dynamics on short timescales, and that measurements of evoked signal propagation are crucial for interpreting neural function.\n\nRead the paper at: https://www.nature.com/articles/s41586-023-06683-4",
- "tags": [
- {
- "id": 4944,
- "tag": "C elegans"
- },
- {
- "id": 394,
- "tag": "Caenorhabditis elegans"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 4945,
- "tag": "DANDI:001075"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 4946,
- "tag": "functional connectivity"
- },
- {
- "id": 17,
- "tag": "optogenetics"
- }
- ],
- "timestamp_created": "2025-08-14 11:10:38.897962+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/001075/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3534": {
"auto_sync": true,
"content_types": "experimental",
"content_types_list": [
"experimental"
],
- "default_context": "draft",
- "id": 3534,
- "name": "OMR Robot CaImaging",
- "repository_type": "dandi",
- "summary": "Recorded calcium imaging data associated with the following manuscript: Embodied Neural Visuomotor Circuits in Neuromechanical Simulations and a Zebrafish Robot ",
+ "default_context": "dev_test_nwbdocker",
+ "id": 1,
+ "name": "Test OSB",
+ "repository_type": "github",
+ "summary": "test",
"tags": [
{
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 4947,
- "tag": "DANDI:001076"
- },
- {
- "id": 305,
- "tag": "Danio rerio - Zebra fish"
- },
- {
- "id": 24,
- "tag": "NWB"
+ "id": 1,
+ "tag": "test"
}
],
- "timestamp_created": "2025-08-14 11:10:40.398925+00:00",
+ "timestamp_created": "2026-07-24 12:46:43+00:00",
"timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/001076/draft",
+ "uri": "https://github.com/OpenSourceBrain/OSBv2",
"user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
+ "email": "a@aa.it",
+ "first_name": "a",
+ "id": "92a19922-2954-4d08-8983-b62b14fd1ec8",
+ "last_name": "a",
+ "username": "aaa"
},
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
+ "user_id": "92a19922-2954-4d08-8983-b62b14fd1ec8"
},
- "3535": {
+ "2": {
"auto_sync": true,
- "content_types": "experimental",
+ "content_types": "modeling",
"content_types_list": [
- "experimental"
+ "modeling"
],
- "default_context": "draft",
- "id": 3535,
- "name": "NeuroTask - Maze Task: A Benchmark Dataset for Multi-Task, -Session and -Subject Neural Analysis",
- "repository_type": "dandi",
- "summary": "NeuroTask is a benchmark dataset designed to facilitate the development of accurate and efficient methods for analyzing multi-session, multi-task, and multi-subject neural data. NeuroTask integrates 6 datasets from motor cortical regions, covering 7 tasks across 17 subjects.\n\nCheck out the github repository for more resources and some example notebooks: https://github.com/catniplab/NeuroTask/tree/nwb\n\nThis dataset includes:\n- Spike counts per unit\n- Behavioral data (hand/cursor position, velocity, force)\n- Events indications",
+ "default_context": "main",
+ "id": 2,
+ "name": "OSBv2Show",
+ "repository_type": "github",
+ "summary": "No",
"tags": [
{
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 4948,
- "tag": "DANDI:001078"
- },
- {
- "id": 210,
- "tag": "Macaca mulatta - Rhesus monkey"
- },
- {
- "id": 24,
- "tag": "NWB"
+ "id": 1,
+ "tag": "test"
}
],
- "timestamp_created": "2025-08-14 11:10:41.803149+00:00",
+ "timestamp_created": "2026-07-27 13:50:45+00:00",
"timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/001078/draft",
+ "uri": "https://github.com/pgleeson/OSBv2_Showcase",
"user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
+ "email": "p.gle.es.on@gmail.com",
+ "first_name": "Test",
+ "id": "0c15dba8-ad02-4c63-b56b-b1ce223ce594",
+ "last_name": "Pat3",
+ "username": "testpat3"
},
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
+ "user_id": "0c15dba8-ad02-4c63-b56b-b1ce223ce594"
},
- "3536": {
+ "6": {
"auto_sync": true,
- "content_types": "experimental",
+ "content_types": "modeling",
"content_types_list": [
- "experimental"
+ "modeling"
],
- "default_context": "0.241023.2011",
- "id": 3536,
- "name": "Targeted micro-fiber arrays for measuring and manipulating localized multi-scale neural dynamics over large, deep brain volumes during behavior",
- "repository_type": "dandi",
- "summary": "Neural population dynamics relevant to behavior vary over multiple spatial and temporal scales across three-dimensional volumes. Current optical approaches lack the spatial coverage and resolution necessary to measure and manipulate naturally occurring patterns of large-scale, distributed dynamics within and across deep brain regions such as the striatum. We designed a new micro-fiber array approach capable of chronically measuring and optogenetically manipulating local dynamics across over 100 targeted locations simultaneously in head-fixed and freely moving mice, enabling the investigation of cell-type- and neurotransmitter-specific signals over arbitrary 3D volumes at a spatial resolution and coverage previously inaccessible. We applied this method to resolve rapid dopamine release dynamics across the striatum, revealing distinct, modality-specific spatiotemporal patterns in response to salient sensory stimuli extending over millimeters of tissue.",
+ "default_context": "master",
+ "id": 6,
+ "name": "Reduced L5 Pyramidal Cell - Bahl et al. 2012 ",
+ "repository_type": "github",
+ "summary": "",
"tags": [
{
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 4949,
- "tag": "DANDI:001084"
- },
- {
- "id": 194,
- "tag": "Mus musculus - House mouse"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 4950,
- "tag": "behaving mice"
- },
- {
- "id": 4852,
- "tag": "dopamine"
- },
- {
- "id": 4951,
- "tag": "freely moving mice"
- },
- {
- "id": 4952,
- "tag": "multi-site photometry"
- },
- {
- "id": 165,
- "tag": "neuromodulation"
+ "id": 5,
+ "tag": "Neocortex"
},
{
- "id": 4889,
- "tag": "striatum"
- }
- ],
- "timestamp_created": "2025-08-14 11:10:43.183567+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/001084/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3537": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "draft",
- "id": 3537,
- "name": "HaloTag Time-Stamping of cFos Transcription in Mouse Brain",
- "repository_type": "dandi",
- "summary": "These images are from a cross-sectional slice through a tet-tag mouse brain expressing a TRE::HaloTag-NLS construct. The mouse was intravenously injected with HaloTag-ligand-JF669 on day 1 and HaloTag-ligand-JF552 on day 2. ",
- "tags": [
- {
- "id": 181,
- "tag": "DANDI"
+ "id": 7,
+ "tag": "OSBv1"
},
{
- "id": 4953,
- "tag": "DANDI:001092"
+ "id": 9,
+ "tag": "Rodent"
},
{
- "id": 194,
- "tag": "Mus musculus - House mouse"
+ "id": 16,
+ "tag": "NEURON"
},
{
- "id": 24,
- "tag": "NWB"
+ "id": 17,
+ "tag": "Layer 5 Pyramidal cell"
}
],
- "timestamp_created": "2025-08-14 11:10:44.600206+00:00",
+ "timestamp_created": "2026-07-27 14:11:32+00:00",
"timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/001092/draft",
+ "uri": "https://github.com/OpenSourceBrain/BahlEtAl2012_ReducedL5PyrCell",
"user": {
- "email": "info@opensourcebrain.org",
+ "email": "osbadmin@opensourcebrain.org",
"first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
+ "id": "897f31bd-b8a4-49bb-97e1-309a12ee6dac",
"last_name": "Admin",
"username": "osbadmin"
},
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
+ "user_id": "897f31bd-b8a4-49bb-97e1-309a12ee6dac"
},
- "3538": {
+ "7": {
"auto_sync": true,
- "content_types": "experimental",
+ "content_types": "modeling",
"content_types_list": [
- "experimental"
+ "modeling"
],
- "default_context": "0.240814.1849",
- "id": 3538,
- "name": "Encoding of female mating dynamics by a hypothalamic line attractor",
- "repository_type": "dandi",
- "summary": "This dataset provides neural and behavioural annotation data from the paper: \"Encoding of female mating dynamics by a hypothalamic line attractor\". Data is stored in the NWB format and contains GCaMP traces, behavioural annotation (timing of behaviour), low-dimensional latent factors from dynamical models and other metadata.",
+ "default_context": "master",
+ "id": 7,
+ "name": "Blender to NeuroML for C elegans connectome",
+ "repository_type": "github",
+ "summary": "Test of Blender to NeuroML conversion\n",
"tags": [
{
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 4954,
- "tag": "DANDI:001097"
+ "id": 6,
+ "tag": "Network model"
},
{
- "id": 194,
- "tag": "Mus musculus - House mouse"
+ "id": 7,
+ "tag": "OSBv1"
},
{
- "id": 24,
- "tag": "NWB"
- }
- ],
- "timestamp_created": "2025-08-14 11:10:46.027572+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/001097/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3539": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "draft",
- "id": 3539,
- "name": "Aberrant Striatal Activity in Parkinsonism and Levodopa-Induced Dyskinesia",
- "repository_type": "dandi",
- "summary": "Action selection relies on the coordinated activity of striatal direct and indirect pathway medium spiny neurons (dMSNs and iMSNs, respectively). Loss of dopamine in Parkinson\u2019s disease is thought to disrupt this balance. While dopamine replacement\nwith levodopa may restore normal function, the development of involuntary movements (levodopa-induced dyskinesia [LID]) limits therapy. How chronic dopamine loss and replacement with levodopa modulate the firing of identified MSNs in behaving\nanimals is unknown. Using optogenetically labeled striatal single-unit recordings, we assess circuit dysfunction in parkinsonism and LID. Counter to current models, we found that following dopamine depletion, iMSN firing was elevated only during periods of immobility, while dMSN firing was dramatically and persistently reduced. Most notably, we identified a subpopulation of dMSNs with abnormally high levodopa-evoked firing rates, which correlated specifically with dyskinesia. These findings provide key insights into the circuit mechanisms underlying parkinsonism and LID, with implications for developing targeted therapies.",
- "tags": [
- {
- "id": 181,
- "tag": "DANDI"
+ "id": 18,
+ "tag": "Blender"
},
{
- "id": 4955,
- "tag": "DANDI:001130"
+ "id": 19,
+ "tag": "C. elegans"
},
{
- "id": 194,
- "tag": "Mus musculus - House mouse"
+ "id": 20,
+ "tag": "Nervous system"
},
{
- "id": 24,
- "tag": "NWB"
+ "id": 21,
+ "tag": "OpenWorm"
}
],
- "timestamp_created": "2025-08-14 11:10:47.408416+00:00",
+ "timestamp_created": "2026-07-27 14:11:32+00:00",
"timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/001130/draft",
+ "uri": "https://github.com/openworm/Blender2NeuroML",
"user": {
- "email": "info@opensourcebrain.org",
+ "email": "osbadmin@opensourcebrain.org",
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},
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],
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- "name": "Multimodal evaluation of network activity and optogenetic interventions in human hippocampal slices",
- "repository_type": "dandi",
- "summary": "High-density microelectrode array (HD-MEA) recordings of human hippocampal brain slices obtained from epilepsy patients, including optogenetic stimulus and several hyperactivity-provoking conditions of culture medium. This data accompanies the manuscript by Andrews, Geng, Voitiuk, et al. 2024.",
+ "default_context": "master",
+ "id": 8,
+ "name": "Primary Auditory Cortex network",
+ "repository_type": "github",
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"tags": [
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- "id": 112,
- "tag": "AAV"
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- },
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- "id": 4956,
- "tag": "DANDI:001132"
- },
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- "id": 4957,
- "tag": "HD-MEA"
- },
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- "id": 262,
- "tag": "Homo sapiens - Human"
- },
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- "id": 24,
- "tag": "NWB"
- },
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- "id": 4958,
- "tag": "epilepsy"
- },
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- "id": 4959,
- "tag": "epileptiform activity"
- },
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- "id": 4960,
- "tag": "gene therapy"
- },
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- "id": 92,
- "tag": "hippocampus"
- },
- {
- "id": 4961,
- "tag": "human hippocampus"
- },
- {
- "id": 17,
- "tag": "optogenetics"
+ "id": 2,
+ "tag": "Auditory system"
},
{
- "id": 4962,
- "tag": "responsive neuromodulation"
+ "id": 3,
+ "tag": "Detailed cell model"
},
{
- "id": 4963,
- "tag": "slice"
- }
- ],
- "timestamp_created": "2025-08-14 11:10:48.912523+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/001132/draft",
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- "name": "Mesoscale Two-Photon Calcium Imaging of Population Level Odor Responses from the Mouse Olfactory Bulb",
- "repository_type": "dandi",
- "summary": "This study explores odor-evoked activity representation in the olfactory bulb (OB) and how odor responses enable odor discrimination. Contrary to some previously cited theories that suggest a sparse representation, we hypothesize a more dense representation during odor presentation. A key question is how odors are reliably encoded in OB activity patterns, and how these patterns contribute to early odor processing. To address this problem, we recorded population level odor responses from the mouse OB with mesoscale two photon calcium imaging and applied machine learning techniques to suggest a model in which sparse coding is largely sufficient for olfaction, but redundant information may make odor coding more robust across different variables.",
- "tags": [
- {
- "id": 181,
- "tag": "DANDI"
+ "id": 4,
+ "tag": "GENESIS"
},
{
- "id": 4964,
- "tag": "DANDI:001170"
+ "id": 5,
+ "tag": "Neocortex"
},
{
- "id": 194,
- "tag": "Mus musculus - House mouse"
+ "id": 6,
+ "tag": "Network model"
},
{
- "id": 24,
- "tag": "NWB"
+ "id": 7,
+ "tag": "OSBv1"
},
{
- "id": 4965,
- "tag": "odor-evoked activity"
+ "id": 8,
+ "tag": "Pyramidal cell"
},
{
- "id": 4966,
- "tag": "olfactory bulb"
+ "id": 9,
+ "tag": "Rodent"
},
{
- "id": 4967,
- "tag": "two photon calcium imaging"
+ "id": 10,
+ "tag": "neuroConstruct"
}
],
- "timestamp_created": "2025-08-14 11:10:50.386115+00:00",
+ "timestamp_created": "2026-07-27 14:14:54+00:00",
"timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/001170/draft",
+ "uri": "https://github.com/OpenSourceBrain/ACnet2",
"user": {
- "email": "info@opensourcebrain.org",
+ "email": "osbadmin@opensourcebrain.org",
"first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
+ "id": "897f31bd-b8a4-49bb-97e1-309a12ee6dac",
"last_name": "Admin",
"username": "osbadmin"
},
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
+ "user_id": "897f31bd-b8a4-49bb-97e1-309a12ee6dac"
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],
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- "id": 3542,
- "name": "Data for: Whisker deprivation triggers a distinct form of cortical homeostatic plasticity that is impaired in the Fmr1 KO",
- "repository_type": "dandi",
- "summary": "This dataset contains all the raw data files for the paper: Whisker deprivation triggers a distinct form of cortical homeostatic plasticity that is impaired in the Fmr1 KO",
+ "default_context": "master",
+ "id": 9,
+ "name": "Allen Institute & NeuroML",
+ "repository_type": "github",
+ "summary": "",
"tags": [
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- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 4968,
- "tag": "DANDI:001171"
- },
- {
- "id": 194,
- "tag": "Mus musculus - House mouse"
+ "id": 5,
+ "tag": "Neocortex"
},
{
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- "tag": "NWB"
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- "timestamp_created": "2025-08-14 11:10:51.887764+00:00",
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- "uri": "https://dandiarchive.org/dandiset/001171/draft",
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- "name": "Calcium imaging in SMA and M1 of macaques",
- "repository_type": "dandi",
- "summary": "The study of motor cortices in non-human primates is relevant to our understanding of human motor control, both in healthy conditions and in movement disorders. Calcium imaging and miniature microscopes allow the study of multiple genetically identified neurons with excellent spatial resolution. We used this method to examine activity patterns of projection neurons in deep layers of the supplementary motor (SMA) and primary motor areas (M1) in four rhesus macaques. We implanted gradient index lenses and expressed GCaMP6f to image calcium transients while the animals were at rest or engaged in an arm reaching task. We tracked the activity of SMA and M1 neurons across conditions, examined cell pairs for synchronous activity, and assessed whether SMA and M1 neuronal activation followed specific sequential activation patterns. We demonstrate the value of in vivo calcium imaging for studying patterns of activity in groups of corticofugal neurons in SMA and M1.",
- "tags": [
- {
- "id": 181,
- "tag": "DANDI"
+ "id": 7,
+ "tag": "OSBv1"
},
{
- "id": 4969,
- "tag": "DANDI:001174"
+ "id": 9,
+ "tag": "Rodent"
},
{
- "id": 210,
- "tag": "Macaca mulatta - Rhesus monkey"
+ "id": 11,
+ "tag": "Large scale brain initiative"
},
{
- "id": 24,
- "tag": "NWB"
+ "id": 12,
+ "tag": "Network"
},
{
- "id": 4970,
- "tag": "One-photon calcium imaging, non-human primates, microendoscope, reaching task, neuronal coactivation, calcium sensors, GCaMP, GRIN lens"
+ "id": 13,
+ "tag": "SWC & others"
}
],
- "timestamp_created": "2025-08-14 11:10:53.456893+00:00",
+ "timestamp_created": "2026-07-27 14:14:54+00:00",
"timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/001174/draft",
+ "uri": "https://github.com/OpenSourceBrain/AllenInstituteNeuroML",
"user": {
- "email": "info@opensourcebrain.org",
+ "email": "osbadmin@opensourcebrain.org",
"first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
+ "id": "897f31bd-b8a4-49bb-97e1-309a12ee6dac",
"last_name": "Admin",
"username": "osbadmin"
},
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
+ "user_id": "897f31bd-b8a4-49bb-97e1-309a12ee6dac"
},
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"auto_sync": true,
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+ "content_types": "modeling",
"content_types_list": [
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+ "modeling"
],
- "default_context": "draft",
- "id": 3544,
- "name": "Cortical acetylcholine dynamics are predicted by cholinergic axon activity and behavior state",
- "repository_type": "dandi",
- "summary": "This dataset includes simultaneous in vivo imaging data of acetylcholine (ACh) sensors and GCaMP-expressing axons in the cortex during spontaneous changes in behavioral states in awake animals. It features detailed recordings of ACh activity, axon activity, and pupil size, providing valuable insights into the spatiotemporal properties of cortical ACh release and its correlation with axonal activity.",
+ "default_context": "master",
+ "id": 10,
+ "name": "L5 Pyramidal Neuron - Almog and Korngreen 2014",
+ "repository_type": "github",
+ "summary": "Conversion to neuroConstruct and NeuroML of the L5 Pyramidal cell model described in:\n\nAlmog M, Korngreen A (2014) [A Quantitative Description of Dendritic Conductances and Its Application to Dendritic Excitation in Layer 5 Pyramidal Neurons](http://www.jneurosci.org/content/34/1/182) J Neurosci 34(1):182-196\n",
"tags": [
{
- "id": 4971,
- "tag": "Axon imaging"
+ "id": 3,
+ "tag": "Detailed cell model"
},
{
- "id": 181,
- "tag": "DANDI"
+ "id": 14,
+ "tag": "Goldman-Hodgkin-Katz current"
},
{
- "id": 4972,
- "tag": "DANDI:001176"
+ "id": 15,
+ "tag": "L5 pyramidal cell"
},
{
- "id": 194,
- "tag": "Mus musculus - House mouse"
+ "id": 16,
+ "tag": "NEURON"
},
{
- "id": 24,
- "tag": "NWB"
+ "id": 5,
+ "tag": "Neocortex"
},
{
- "id": 4973,
- "tag": "acetylcholine"
+ "id": 7,
+ "tag": "OSBv1"
},
{
- "id": 380,
- "tag": "brain states"
+ "id": 8,
+ "tag": "Pyramidal cell"
},
{
- "id": 4974,
- "tag": "neuromodulator"
+ "id": 9,
+ "tag": "Rodent"
},
{
- "id": 4975,
- "tag": "two-photon-imaging"
+ "id": 10,
+ "tag": "neuroConstruct"
}
],
- "timestamp_created": "2025-08-14 11:10:55.073008+00:00",
+ "timestamp_created": "2026-07-27 14:14:55+00:00",
"timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/001176/draft",
+ "uri": "https://github.com/OpenSourceBrain/korngreen-pyramidal",
"user": {
- "email": "info@opensourcebrain.org",
+ "email": "osbadmin@opensourcebrain.org",
"first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
+ "id": "897f31bd-b8a4-49bb-97e1-309a12ee6dac",
"last_name": "Admin",
"username": "osbadmin"
},
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
+ "user_id": "897f31bd-b8a4-49bb-97e1-309a12ee6dac"
},
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"auto_sync": true,
- "content_types": "experimental",
+ "content_types": "modeling",
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],
- "default_context": "0.240827.1656",
- "id": 3545,
- "name": "Stimulus-specific hypothalamic encoding of a persistent defensive state",
- "repository_type": "dandi",
- "summary": "This dataset provides neural and behavioural annotation data from the paper: \"Stimulus-specific hypothalamic encoding of a persistent defensive state\". Data is stored in the NWB format and contains GCaMP traces, behavioural annotation (timing of behaviour) and other metadata.\n\n",
+ "default_context": "main",
+ "id": 11,
+ "name": "Arbor Showcase",
+ "repository_type": "github",
+ "summary": "",
"tags": [
{
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 4976,
- "tag": "DANDI:001182"
+ "id": 7,
+ "tag": "OSBv1"
},
{
- "id": 194,
- "tag": "Mus musculus - House mouse"
+ "id": 22,
+ "tag": "Arbor"
},
{
- "id": 24,
- "tag": "NWB"
+ "id": 23,
+ "tag": "Showcase"
}
],
- "timestamp_created": "2025-08-14 11:10:56.622851+00:00",
+ "timestamp_created": "2026-07-27 14:14:55+00:00",
"timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/001182/draft",
+ "uri": "https://github.com/OpenSourceBrain/ArborShowcase",
"user": {
- "email": "info@opensourcebrain.org",
+ "email": "osbadmin@opensourcebrain.org",
"first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
+ "id": "897f31bd-b8a4-49bb-97e1-309a12ee6dac",
"last_name": "Admin",
"username": "osbadmin"
},
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
+ "user_id": "897f31bd-b8a4-49bb-97e1-309a12ee6dac"
},
- "3546": {
+ "12": {
"auto_sync": true,
- "content_types": "experimental",
+ "content_types": "modeling",
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- "experimental"
+ "modeling"
],
- "default_context": "draft",
- "id": 3546,
- "name": "Neural circuits for social modulation of a persistent negative emotional state",
- "repository_type": "dandi",
- "summary": "electrophysiological recording from neurons in medial preoptic area under chronic restrain stress",
+ "default_context": "master",
+ "id": 12,
+ "name": "Blue Brain Project Showcase",
+ "repository_type": "github",
+ "summary": "",
"tags": [
{
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 4977,
- "tag": "DANDI:001183"
+ "id": 3,
+ "tag": "Detailed cell model"
},
{
- "id": 194,
- "tag": "Mus musculus - House mouse"
+ "id": 11,
+ "tag": "Large scale brain initiative"
},
{
- "id": 24,
- "tag": "NWB"
- }
- ],
- "timestamp_created": "2025-08-14 11:10:58.016119+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/001183/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "default_context": "0.240829.1458",
- "id": 3547,
- "name": "Brain-wide microstrokes affect the stability of memory circuits in the hippocampus",
- "repository_type": "dandi",
- "summary": "Data for the publication \"Brain-wide microstrokes affect the stability of memory circuits in the hippocampus\".",
- "tags": [
- {
- "id": 181,
- "tag": "DANDI"
+ "id": 16,
+ "tag": "NEURON"
},
{
- "id": 4978,
- "tag": "DANDI:001184"
+ "id": 5,
+ "tag": "Neocortex"
},
{
- "id": 194,
- "tag": "Mus musculus - House mouse"
+ "id": 12,
+ "tag": "Network"
},
{
"id": 24,
- "tag": "NWB"
- },
- {
- "id": 488,
- "tag": "ca1"
- },
- {
- "id": 92,
- "tag": "hippocampus"
- },
- {
- "id": 4979,
- "tag": "microlesions"
- },
- {
- "id": 4980,
- "tag": "spatial navigation"
+ "tag": "Neuronal reconstruction"
},
{
- "id": 4981,
- "tag": "stroke"
+ "id": 7,
+ "tag": "OSBv1"
},
{
- "id": 475,
- "tag": "two-photon imaging"
+ "id": 8,
+ "tag": "Pyramidal cell"
},
{
- "id": 474,
- "tag": "virtual reality"
+ "id": 9,
+ "tag": "Rodent"
}
],
- "timestamp_created": "2025-08-14 11:10:59.748226+00:00",
+ "timestamp_created": "2026-07-27 16:25:49+00:00",
"timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/001184/draft",
+ "uri": "https://github.com/OpenSourceBrain/BlueBrainProjectShowcase",
"user": {
- "email": "info@opensourcebrain.org",
+ "email": "osbadmin@opensourcebrain.org",
"first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
+ "id": "897f31bd-b8a4-49bb-97e1-309a12ee6dac",
"last_name": "Admin",
"username": "osbadmin"
},
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
+ "user_id": "897f31bd-b8a4-49bb-97e1-309a12ee6dac"
},
- "3548": {
+ "13": {
"auto_sync": true,
- "content_types": "experimental",
+ "content_types": "modeling",
"content_types_list": [
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],
- "default_context": "0.240904.2347",
- "id": 3548,
- "name": "Data for: Daume et al. (2024) \"Persistent activity during working memory maintenance predicts long-term memory formation in the human hippocampus\"",
- "repository_type": "dandi",
- "summary": "This dataset contains the source data for Daume et al. (2024) \"Persistent activity during working memory maintenance predicts long-term memory formation in the human hippocampus\". Example code to analyze the data is deposited at Github (https://github.com/rutishauserlab/SBCAT-NO-release-NWB) and Zenodo (https://doi.org/10.5281/zenodo.13621888).\n\nAbstract:\nWorking Memory (WM) and Long-Term Memory (LTM) are often viewed as separate cognitive systems. Little is known about how these systems interact when forming memories. We recorded single neurons in the human medial temporal lobe while patients maintained novel items in WM and a subsequent recognition memory test for the same items. In the hippocampus but not the amygdala, the level of WM content-selective persist activity during WM maintenance was predictive of whether the item was later recognized with high confidence or forgotten. In contrast, visually evoked activity in the same cells was not predictive of LTM formation. During LTM retrieval, memory-selective neurons responded more strongly to familiar stimuli for which persistent activity was high while they were maintained in WM. Our study suggests that hippocampal persistent activity of the same cell supports both WM maintenance and LTM encoding, thereby revealing a common single-neuron component of these two memory systems.\n\nNote: \nsub-35_ses-1_ecephys+image.nwb is missing waveform mean/std data, but they can be derived from the raw spike waveforms included in the file.",
+ "default_context": "master",
+ "id": 13,
+ "name": "Sparsely connected spiking neuron network - Brunel 2000",
+ "repository_type": "github",
+ "summary": "",
"tags": [
{
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 4982,
- "tag": "DANDI:001187"
- },
- {
- "id": 262,
- "tag": "Homo sapiens - Human"
- },
- {
- "id": 24,
- "tag": "NWB"
+ "id": 25,
+ "tag": "Generic"
},
{
- "id": 18,
- "tag": "cognitive neuroscience"
+ "id": 26,
+ "tag": "Integrate and fire neuron"
},
{
- "id": 4983,
- "tag": "human electrophysiology"
+ "id": 27,
+ "tag": "NEST"
},
{
- "id": 4984,
- "tag": "long-term memory"
+ "id": 5,
+ "tag": "Neocortex"
},
{
- "id": 25,
- "tag": "open source"
+ "id": 6,
+ "tag": "Network model"
},
{
- "id": 4985,
- "tag": "single units"
+ "id": 7,
+ "tag": "OSBv1"
},
{
- "id": 280,
- "tag": "working memory"
+ "id": 28,
+ "tag": "Point neuron network"
}
],
- "timestamp_created": "2025-08-14 11:11:01.218313+00:00",
+ "timestamp_created": "2026-07-27 16:25:49+00:00",
"timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/001187/draft",
+ "uri": "https://github.com/OpenSourceBrain/Brunel2000",
"user": {
- "email": "info@opensourcebrain.org",
+ "email": "osbadmin@opensourcebrain.org",
"first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
+ "id": "897f31bd-b8a4-49bb-97e1-309a12ee6dac",
"last_name": "Admin",
"username": "osbadmin"
},
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
+ "user_id": "897f31bd-b8a4-49bb-97e1-309a12ee6dac"
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],
- "default_context": "0.240912.1925",
- "id": 3549,
- "name": "A combinatorial neural code for long-term motor memory.",
- "repository_type": "dandi",
- "summary": "Data from \"A combinatorial neural code for long-term motor memory.\" Jae-Hyun Kim, Kayvon Daie, Nuo Li. Nature 2024\n\nLongitudinal calcium imaging of anterior lateral motor cortex in the mouse across multiple tasks, in which mice learned to perform directional licking in different task contexts. \n\nThis work was funded by the Pew Scholars Program, NIH NS112312, NS113110, NS131229, NS132025, McKnight Foundation, and Simons Collaboration on the Global Brain. \n",
+ "default_context": "master",
+ "id": 14,
+ "name": "c302",
+ "repository_type": "github",
+ "summary": "",
"tags": [
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- "id": 181,
- "tag": "DANDI"
+ "id": 6,
+ "tag": "Network model"
},
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- "id": 4986,
- "tag": "DANDI:001188"
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+ "tag": "OSBv1"
},
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- "id": 194,
- "tag": "Mus musculus - House mouse"
+ "id": 19,
+ "tag": "C. elegans"
},
{
- "id": 24,
- "tag": "NWB"
+ "id": 20,
+ "tag": "Nervous system"
+ },
+ {
+ "id": 21,
+ "tag": "OpenWorm"
+ },
+ {
+ "id": 29,
+ "tag": "NeuroML2"
}
],
- "timestamp_created": "2025-08-14 11:11:02.703679+00:00",
+ "timestamp_created": "2026-07-27 16:25:50+00:00",
"timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/001188/draft",
+ "uri": "https://github.com/openworm/c302",
"user": {
- "email": "info@opensourcebrain.org",
+ "email": "osbadmin@opensourcebrain.org",
"first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
+ "id": "897f31bd-b8a4-49bb-97e1-309a12ee6dac",
"last_name": "Admin",
"username": "osbadmin"
},
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
+ "user_id": "897f31bd-b8a4-49bb-97e1-309a12ee6dac"
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- "id": 3550,
- "name": "In vivo Calcium Imaging: Genotype Data: NOR",
- "repository_type": "dandi",
- "summary": "Data set for Tat(-) and Tat(+) male mice comparing genotype differences without any drug treatment\nResearcher: Barkha J. Yadav Samudrala and Sylvia Fitting",
+ "default_context": "master",
+ "id": 15,
+ "name": "CA1 Oriens Lacunosum Moleculare - Lawrence et al. 2006",
+ "repository_type": "github",
+ "summary": "CA1 Oriens Lacunosum Moleculare multi-compartment model:\r\nLawrence JJ, Saraga F, Churchill JF, Statland JM, Travis KE, Skinner FK, McBain CJ (2006) Somatodendritic Kv7-KCNQ-M channels control interspike interval in hippocampal interneurons. J Neurosci 26:12325-38",
"tags": [
{
- "id": 181,
- "tag": "DANDI"
+ "id": 30,
+ "tag": "CA1"
},
{
- "id": 4987,
- "tag": "DANDI:001190"
+ "id": 31,
+ "tag": "Hippocampal formation"
},
{
- "id": 4988,
- "tag": "In vivo calcium imaging, endocannabinoids, HIV-1, Tat"
+ "id": 32,
+ "tag": "Hippocampus"
},
{
- "id": 194,
- "tag": "Mus musculus - House mouse"
+ "id": 33,
+ "tag": "Interneuron"
},
{
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- "tag": "NWB"
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- ],
- "timestamp_created": "2025-08-14 11:11:04.075209+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/001190/draft",
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- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "id": 3551,
- "name": "Data for: Distinct spatiotemporal patterns of syntactic and semantic processing in human inferior frontal gyrus",
- "repository_type": "dandi",
- "summary": "This dataset comprises high-gamma brain activity recordings (70-150 Hz) obtained through electrocorticography (ECoG) from human subjects. It focuses on neural responses during syntactic and semantic processing tasks, specifically within the inferior frontal gyrus. The data is formatted in the Neurodata Without Borders (NWB) standard, facilitating ease of use and integration within the neuroscience community. This dataset supports the findings published in the article \"Distinct spatiotemporal patterns of syntactic and semantic processing in human inferior frontal gyrus,\" accessible via DOI: 10.1038/s41562-022-01334-6.",
- "tags": [
- {
- "id": 181,
- "tag": "DANDI"
+ "id": 16,
+ "tag": "NEURON"
},
{
- "id": 4989,
- "tag": "DANDI:001193"
+ "id": 7,
+ "tag": "OSBv1"
},
{
- "id": 262,
- "tag": "Homo sapiens - Human"
+ "id": 34,
+ "tag": "Oriens Lacunosum Moleculare"
},
{
- "id": 24,
- "tag": "NWB"
+ "id": 9,
+ "tag": "Rodent"
}
],
- "timestamp_created": "2025-08-14 11:11:05.492110+00:00",
+ "timestamp_created": "2026-07-27 16:25:50+00:00",
"timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/001193/draft",
+ "uri": "https://github.com/agmccrei/CA1-Oriens-Lacunosum-Moleculare---Lawrence-et-al.-2006",
"user": {
- "email": "info@opensourcebrain.org",
+ "email": "osbadmin@opensourcebrain.org",
"first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
+ "id": "897f31bd-b8a4-49bb-97e1-309a12ee6dac",
"last_name": "Admin",
"username": "osbadmin"
},
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
+ "user_id": "897f31bd-b8a4-49bb-97e1-309a12ee6dac"
},
- "3552": {
+ "16": {
"auto_sync": true,
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+ "content_types": "modeling",
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- "default_context": "0.250408.1733",
- "id": 3552,
- "name": "Separable Dorsal Raphe Dopamine Projections Mediate the Facets of Loneliness-like State",
- "repository_type": "dandi",
- "summary": "Supporting data for the publication \"Separable Dorsal Raphe Dopamine Projections Mediate the Facets of Loneliness-like State\" by Christopher R. Lee, Gillian A. Matthews, Mackenzie E. Lemieux, Elizabeth M. Wasserlein, Matilde Borio, Raymundo L. Miranda, Laurel R. Keyes, Gates P. Schneider, Caroline Jia, Andrea Tran, Faith Aloboudi, May G. Chan, Enzo Peroni, Grace S. Pereira, Alba L\u00f3pez-Moraga, Anna Pall\u00e9, Eyal Y. Kimchi, Nancy Padilla-Coreano, Romy Wichmann, Kay M. Tye. bioRxiv 2025.02.03.636224; doi: https://doi.org/10.1101/2025.02.03.636224. \nThis dataset includes both in vivo calcium imaging data with supporting behavioral videos and ex vivo patch-clamp electrophysiology recordings.\n\nEphys Patching data also used in earlier pre-print under the title: \"Separable Dorsal Raphe Dopamine Projections Mediate Sociability and Valence\" by Gillian A. Matthews, Mackenzie E. Lemieux, Elizabeth M. Brewer, Matilde Borio, Raymundo Miranda, Laurel R. Keyes, Enzo Peroni, Grace S. Pereira, Alba Lopez-Moraga, Anna Pall\u00e9, Christopher R. Lee, Eyal Y. Kimchi, Nancy Padilla-Coreano, Romy Wichmann, Kay M. Tye. Research Square. 2021 Dec 3. doi: 10.21203/rs.3.rs-1025403/v1.",
- "tags": [
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- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 4990,
- "tag": "DANDI:001195"
- },
- {
- "id": 4991,
- "tag": "Dopamine neurons"
- },
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- "id": 4992,
- "tag": "Dorsal Raphe Nucleus (DRN)"
- },
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- "id": 194,
- "tag": "Mus musculus - House mouse"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 4993,
- "tag": "Social Isolation"
- },
+ "modeling"
+ ],
+ "default_context": "master",
+ "id": 16,
+ "name": "CA1 Oriens Lacunosum Moleculare - Saraga et al. 2003",
+ "repository_type": "github",
+ "summary": "CA1 Oriens Lacunosum Moleculare multi-compartment model:\r\nSaraga F, Wu CP, Zhang L, Skinner FK (2003) Active Dendrites and Spike Propagation in Multi-compartment Models of Oriens-Lacunosum/Moleculare Hippocampal Interneurons. J Physiol 552(3):673-689",
+ "tags": [
{
- "id": 4994,
- "tag": "Social Motivation"
+ "id": 30,
+ "tag": "CA1"
},
{
- "id": 4995,
- "tag": "behavior videos"
+ "id": 3,
+ "tag": "Detailed cell model"
},
{
- "id": 4996,
- "tag": "behavioral neuroscience"
+ "id": 31,
+ "tag": "Hippocampal formation"
},
{
- "id": 525,
- "tag": "calcium imaging"
+ "id": 32,
+ "tag": "Hippocampus"
},
{
- "id": 35,
- "tag": "electrophysiology"
+ "id": 16,
+ "tag": "NEURON"
},
{
- "id": 143,
- "tag": "mouse behavior"
+ "id": 7,
+ "tag": "OSBv1"
},
{
- "id": 4997,
- "tag": "mouse model"
+ "id": 34,
+ "tag": "Oriens Lacunosum Moleculare"
},
{
- "id": 17,
- "tag": "optogenetics"
+ "id": 9,
+ "tag": "Rodent"
}
],
- "timestamp_created": "2025-08-14 11:11:07.034766+00:00",
+ "timestamp_created": "2026-07-27 16:26:54+00:00",
"timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/001195/draft",
+ "uri": "https://github.com/agmccrei/CA1-Oriens-Lacunosum-Moleculare---Saraga-et-al.-2003",
"user": {
- "email": "info@opensourcebrain.org",
+ "email": "osbadmin@opensourcebrain.org",
"first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
+ "id": "897f31bd-b8a4-49bb-97e1-309a12ee6dac",
"last_name": "Admin",
"username": "osbadmin"
},
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
+ "user_id": "897f31bd-b8a4-49bb-97e1-309a12ee6dac"
},
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"auto_sync": true,
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],
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- "id": 3553,
- "name": "Neural Pathways Modulation in the Anesthetized Rat Elicited by Trials of Transcranial Focused Ultrasound Stimulation",
- "repository_type": "dandi",
- "summary": "In these recordings, we recorded neuronal activities from cortical-thalamocortical (CTC) pathway, including the somatosensory cortex (S1) and posteromedial complex (POm) of the thalamus responded to different Pulse Repetition Frequencies (PRFs ) or Pulse Durations (PDs) and Pressure Levels of transcranial ultrasound focused stimulation (tFUS) using a 128-element transducer to stimulate either at S1or PoM. Recordings for S1 are taken using 64-channel Cambridge or Neuronexus electrodes and recordings for POm are taken using 32-channel Nueronexus electrodes. Ultrasound stimulation is delivered every 2.5 seconds and each recording has 500 trials. The Ultrasound Duration (UD) and pressure level used in each recording is 67ms. The PRFs, PDs and pressure levels for each recording can be found in the identifier field. For example, in BH596_3000_200_67_10, the PRF is 3000Hz, PD is 200us and pressure level is 10V. Detailed description about this dataset can be found in the following publication. Please cite the paper if you would use a portion of the dataset. Gao, H., Ramachandran, S., Yu, K., & He, B. (2025). Transcranial Focused Ultrasound Modulates Feedforward and Feedback Cortico-Thalamo-Cortical Pathways by Selectively Activating Excitatory Neurons. The Journal of Neuroscience, 45(23), e2218242025. https://doi.org/10.1523/JNEUROSCI.2218-24.2025",
+ "default_context": "master",
+ "id": 17,
+ "name": "CA1 PV+ fast firing cell - Ferguson et al. 2013",
+ "repository_type": "github",
+ "summary": "",
"tags": [
{
- "id": 181,
- "tag": "DANDI"
+ "id": 35,
+ "tag": "Brian"
},
{
- "id": 4998,
- "tag": "DANDI:001199"
+ "id": 36,
+ "tag": "CA1 PV fast-firing cell"
},
{
- "id": 24,
- "tag": "NWB"
+ "id": 31,
+ "tag": "Hippocampal formation"
},
{
- "id": 205,
- "tag": "Rattus norvegicus - Norway rat"
- }
- ],
- "timestamp_created": "2025-08-14 11:11:08.600915+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/001199/draft",
- "user": {
- "email": "info@opensourcebrain.org",
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- "last_name": "Admin",
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- "default_context": "draft",
- "id": 3554,
- "name": "Neural Spiking Data in Rats Responding to Optogenetic Stimulation and Transcranial Focused Ultrasound Stimulation in Neural Pathway",
- "repository_type": "dandi",
- "summary": "In these recordings, we stimulate rats that were injected with AAV virus to optogenetically tag for CaMKII or PV to distinguish between excitatory pyramidal neurons and inhibitory interneurons in both somatosensory cortex (S1) and posteromedial complex (POm) of the thalamus. We alternate between stimulating them optogenetically in order to tag the neuronal subtype and testing different PRFs (pulse repetition frequencies), pulse durations and pressure levels of ultrasound stimulation using a 128-element random array ultrasound transducer to stimulate the somatosensory cortex. Electrophysiological recordings were acquired using 32-channel 64-channel NeuroNexus electrodes inserted into S1 and 32-channel NeuroNexus electrodes inserted into POm. Ultrasound stimulation is delivered every 2.5 seconds with a 10% jitter, and each recording has 500 trials. Optogenetic stimulation was delivered at 150mA of 50ms. The tFUS parameters (PRFs, PDs and pressure levels) for each recording can be found in the identifier field. For example, in BH596_3000_200_67_10_S1_POm, the PRF is 3000Hz, PD is 200us, pressure level is 10V and stimulation target is POm. \n",
- "tags": [
+ "id": 32,
+ "tag": "Hippocampus"
+ },
{
- "id": 181,
- "tag": "DANDI"
+ "id": 33,
+ "tag": "Interneuron"
},
{
- "id": 4999,
- "tag": "DANDI:001200"
+ "id": 37,
+ "tag": "Izhikevich neuron model"
},
{
- "id": 24,
- "tag": "NWB"
+ "id": 38,
+ "tag": "Mouse"
},
{
- "id": 205,
- "tag": "Rattus norvegicus - Norway rat"
+ "id": 7,
+ "tag": "OSBv1"
}
],
- "timestamp_created": "2025-08-14 11:11:10.140371+00:00",
+ "timestamp_created": "2026-07-27 16:26:54+00:00",
"timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/001200/draft",
+ "uri": "https://github.com/OpenSourceBrain/FergusonEtAl2013-PVFastFiringCell",
"user": {
- "email": "info@opensourcebrain.org",
+ "email": "osbadmin@opensourcebrain.org",
"first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
+ "id": "897f31bd-b8a4-49bb-97e1-309a12ee6dac",
"last_name": "Admin",
"username": "osbadmin"
},
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
+ "user_id": "897f31bd-b8a4-49bb-97e1-309a12ee6dac"
},
- "3555": {
+ "18": {
"auto_sync": true,
- "content_types": "experimental",
+ "content_types": "modeling",
"content_types_list": [
- "experimental"
+ "modeling"
],
- "default_context": "draft",
- "id": 3555,
- "name": "LINK: Long-Term Intracortical Neural Activity and Kinematics",
- "repository_type": "dandi",
- "summary": "This dataset contains 312 sessions of multiunit threshold crossings, spiking band power, and behavioral data from a macaque performing a self-paced finger movement task. These sessions were recorded on 303 days spanning 1,242 days (~3.5 years). The dataset will be useful in evaluating the stability of neural population recordings and BMI decoding algorithms across long time frames. On each day, we include 96 channels of neural activity from Utah microelectrode arrays implanted in the motor cortex (M1). The positions & velocities of the index finger and middle-ring-small fingers were recorded using a manipulandum, where positions were normalized between full flexion and full extension. The experimental task was to move the two finger groups to acquire targets cued on a screen. Each session has 375 trials of one of two target presentation styles, center-out (trials alternating between the targets at a non-center location and then both targets at center), or random targets (target position for each finger chosen randomly at each trial, with a maximum flexion difference between fingers of 50%). Further details on the experimental setup can be found in Nason et al. 2021, Neuron (DOI: 10.1016/j.neuron.2021.08.009) Code for this dataset can be found at (https://github.com/chesteklab/LINK_dataset). The associated paper is currently in submission, but will be available here.",
+ "default_context": "master",
+ "id": 18,
+ "name": "CA1 pyramidal cell - Ferguson et al. 2014",
+ "repository_type": "github",
+ "summary": "",
"tags": [
{
- "id": 181,
- "tag": "DANDI"
+ "id": 39,
+ "tag": "Brain"
},
{
- "id": 5000,
- "tag": "DANDI:001201"
+ "id": 30,
+ "tag": "CA1"
},
{
- "id": 210,
- "tag": "Macaca mulatta - Rhesus monkey"
+ "id": 40,
+ "tag": "CA1 Pyramidal cell"
},
{
- "id": 24,
- "tag": "NWB"
+ "id": 31,
+ "tag": "Hippocampal formation"
},
{
- "id": 5001,
- "tag": "brain-machine interfaces"
+ "id": 32,
+ "tag": "Hippocampus"
},
{
- "id": 5002,
- "tag": "chronic recordings"
+ "id": 37,
+ "tag": "Izhikevich neuron model"
},
{
- "id": 5003,
- "tag": "intracortical"
+ "id": 7,
+ "tag": "OSBv1"
},
{
- "id": 450,
- "tag": "non-human primate"
+ "id": 9,
+ "tag": "Rodent"
}
],
- "timestamp_created": "2025-08-14 11:11:11.624179+00:00",
+ "timestamp_created": "2026-07-27 16:26:55+00:00",
"timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/001201/draft",
+ "uri": "https://github.com/OpenSourceBrain/FergusonEtAl2014-CA1PyrCell",
"user": {
- "email": "info@opensourcebrain.org",
+ "email": "osbadmin@opensourcebrain.org",
"first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
+ "id": "897f31bd-b8a4-49bb-97e1-309a12ee6dac",
"last_name": "Admin",
"username": "osbadmin"
},
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
+ "user_id": "897f31bd-b8a4-49bb-97e1-309a12ee6dac"
},
- "3556": {
+ "19": {
"auto_sync": true,
- "content_types": "experimental",
+ "content_types": "modeling",
"content_types_list": [
- "experimental"
+ "modeling"
],
- "default_context": "draft",
- "id": 3556,
- "name": "Neural Spike Time Response recorded by NET Probe Soft Electrode in the Primary Somatosensory Cortex with Phased Ultrasound Array Stimulation",
- "repository_type": "dandi",
- "summary": "In this study, we investigate the neuronal response to transcranial focused ultrasound (tFUS) stimulation on somatosensory cortex by using a 128-element array transducer. Intracranial recordings were performed using a 32-channel Soft NET Probe, which is compatible with tFUS. The electrode was chronically implanted and can be repeatedly used. Wistar rats were anesthetized using isoflurane at 2% during recording session. tFUS with different parameters was applied every 2.5s (\u00b110%). This dataset contains spike times of the sorted neural signals and event time for each tFUS trial. In these recordings, we test different pulse repetition frequencies (PRFs) and pressure levels of ultrasound stimulation to explore the neuronal response to tFUS. The pulse duration was kept at 67ms. Each recording has 500 trials. We also compare two setup of the transducer, one is with a collimator and the other one is without the collimator, to explore the better setup for chronic recording and tFUS modulation.",
+ "default_context": "master",
+ "id": 19,
+ "name": "CA1 Pyramidal Cell - Migliore et al. 2005",
+ "repository_type": "github",
+ "summary": "\r\nConversion of [hippocampal CA1 pyramidal cell](http://neurolex.org/wiki/Category:Hippocampus_CA1_pyramidal_cell) from [Migliore et al 2005](http://senselab.med.yale.edu/ModelDB/ShowModel.asp?model=55035).\r\n\r\n[](https://travis-ci.org/OpenSourceBrain/CA1PyramidalCell)\r\n",
"tags": [
{
- "id": 181,
- "tag": "DANDI"
+ "id": 30,
+ "tag": "CA1"
},
{
- "id": 5004,
- "tag": "DANDI:001202"
+ "id": 40,
+ "tag": "CA1 Pyramidal cell"
},
{
- "id": 24,
- "tag": "NWB"
+ "id": 3,
+ "tag": "Detailed cell model"
},
{
- "id": 205,
- "tag": "Rattus norvegicus - Norway rat"
- }
- ],
- "timestamp_created": "2025-08-14 11:11:13.025156+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/001202/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
- },
- "3557": {
- "auto_sync": true,
- "content_types": "experimental",
- "content_types_list": [
- "experimental"
- ],
- "default_context": "0.250602.0251",
- "id": 3557,
- "name": "Adaptation to visual sparsity enhances responses to isolated stimuli",
- "repository_type": "dandi",
- "summary": "Associated Reference Publication: Sensory systems adapt their response properties to the statistics of their inputs. For instance, visual systems adapt to low-order statistics like mean and variance to encode stimuli efficiently or to facilitate specific downstream computations. However, it remains unclear how other statistical features affect sensory adaptation. Here, we explore how Drosophila\u2019s visual motion circuits adapt to stimulus sparsity, a measure of the signal\u2019s intermittency not captured by low-order statistics alone. Early visual neurons in both ON and OFF pathways alter their responses dramatically with stimulus sparsity, responding positively to both light and dark sparse stimuli but linearly to dense stimuli. These changes extend to downstream ON and OFF direction-selective neurons, which are activated by sparse stimuli of both polarities, but respond with opposite signs to light and dark regions of dense stimuli. Thus, sparse stimuli activate both ON and OFF pathways, recruiting a larger fraction of the circuit and potentially enhancing the salience of isolated stimuli. Overall, our results reveal visual response properties that increase the fraction of the circuit responding to sparse, isolated stimuli.",
- "tags": [
+ "id": 31,
+ "tag": "Hippocampal formation"
+ },
{
- "id": 181,
- "tag": "DANDI"
+ "id": 32,
+ "tag": "Hippocampus"
},
{
- "id": 5005,
- "tag": "DANDI:001205"
+ "id": 16,
+ "tag": "NEURON"
},
{
- "id": 274,
- "tag": "Drosophila melanogaster - Fruit fly"
+ "id": 7,
+ "tag": "OSBv1"
},
{
- "id": 24,
- "tag": "NWB"
+ "id": 9,
+ "tag": "Rodent"
}
],
- "timestamp_created": "2025-08-14 11:11:14.405464+00:00",
+ "timestamp_created": "2026-07-27 16:26:55+00:00",
"timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/001205/draft",
+ "uri": "https://github.com/OpenSourceBrain/CA1PyramidalCell",
"user": {
- "email": "info@opensourcebrain.org",
+ "email": "osbadmin@opensourcebrain.org",
"first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
+ "id": "897f31bd-b8a4-49bb-97e1-309a12ee6dac",
"last_name": "Admin",
"username": "osbadmin"
},
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
+ "user_id": "897f31bd-b8a4-49bb-97e1-309a12ee6dac"
},
- "3558": {
+ "20": {
"auto_sync": true,
- "content_types": "experimental",
+ "content_types": "modeling",
"content_types_list": [
- "experimental"
+ "modeling"
],
- "default_context": "draft",
- "id": 3558,
- "name": "FALCON Benchmark M1-B: primary motor cortex recordings in primate during reach-to-grasp task",
- "repository_type": "dandi",
- "summary": "This dataset contains multiunit spiking times and behavioral data from a macaque performing a reach-to-grasp task. The experimental task was a center-out reaching task with four different objects in eight possible positions. Neural activity was recorded from electrode arrays implanted in primary motor cortex (M1). Electromyographical (EMG) activity was simultaneously recorded from upper limb muscles. Provided as part of the FALCON Benchmark: https://snel-repo.github.io/falcon/ \n\nThe datafile contains the following data in the acquisition fields: `preprocessed_emg` containing iEMG recordings from 16 muscles and `eval_mask` indicating within-trial periods used for evaluating performance in the FALCON Benchmark. Each datafile also includes spike times in the `units` field, and trial metadata for each reach and grasp (`gocue_time`, `move_onset_time`, `contact_time`, `reward_time`, `result`, `number`, `tgt_loc`, `tgt_obj`, `obj_id`, `condition_id`) in the `trials` field.\n\nAs part of the FALCON challenge, dataset files are released in three ways. The `held-in-calib` data includes many trials of data intended for calibration of decoders in the FALCON challenge. The `held-in-minival` data is a small subset of the `held-in-calib` data intended for FALCON models to validate submission format. Lastly, `held-out-calib` data are separate sessions of data from `held-in-calib`, but have much fewer trials, intended to be used for few-shot recalibration. Please bear in mind these factors if making use of this dataset for purposes outside of the FALCON Benchmark. Each dataset split is considered one \"subject\" by the DANDI repository; only data from one monkey is included.\n\nData from an additional monkey is available here: https://dandiarchive.org/dandiset/000941",
+ "default_context": "master",
+ "id": 20,
+ "name": "CATMAID Showcase",
+ "repository_type": "github",
+ "summary": "Project for example NeuroML files generated by [CATMAID](http://www.catmaid.org).\n",
"tags": [
{
- "id": 181,
- "tag": "DANDI"
+ "id": 7,
+ "tag": "OSBv1"
},
{
- "id": 5006,
- "tag": "DANDI:001209"
+ "id": 24,
+ "tag": "Neuronal reconstruction"
},
{
- "id": 210,
- "tag": "Macaca mulatta - Rhesus monkey"
+ "id": 41,
+ "tag": "Connectomics"
},
{
- "id": 24,
- "tag": "NWB"
+ "id": 42,
+ "tag": "Drosophila"
+ },
+ {
+ "id": 43,
+ "tag": "Multiple"
}
],
- "timestamp_created": "2025-08-14 11:11:15.862519+00:00",
+ "timestamp_created": "2026-07-27 16:26:55+00:00",
"timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/001209/draft",
+ "uri": "https://github.com/OpenSourceBrain/CATMAIDShowcase",
"user": {
- "email": "info@opensourcebrain.org",
+ "email": "osbadmin@opensourcebrain.org",
"first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
+ "id": "897f31bd-b8a4-49bb-97e1-309a12ee6dac",
"last_name": "Admin",
"username": "osbadmin"
},
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
+ "user_id": "897f31bd-b8a4-49bb-97e1-309a12ee6dac"
},
- "3559": {
+ "21": {
"auto_sync": true,
- "content_types": "experimental",
+ "content_types": "modeling",
"content_types_list": [
- "experimental"
+ "modeling"
],
- "default_context": "0.241111.1757",
- "id": 3559,
- "name": "Intrinsic optical imaging (IOI) and GCaMP mouse brain data, with and without rigidified carotid artery",
- "repository_type": "dandi",
- "summary": "Dataset corresponding to the article \"Neurovascular Coupling over Cortical Brain Areas and Resting State Network Connectivity With and Without Rigidified Carotid Artery\". ",
+ "default_context": "master",
+ "id": 21,
+ "name": "OpenWorm C. elegans network model",
+ "repository_type": "github",
+ "summary": "\r\n\r\n**The latest version of this model can be found at http://www.opensourcebrain.org/projects/c302**\r\nNote: the development of the OpenWorm model of [C. elegans](http://en.wikipedia.org/wiki/Caenorhabditis_elegans) is taking place at [http://www.openworm.org](http://www.openworm.org).\r\n\r\nA full list of those involved in that project can be found [here](http://www.openworm.org/people.html).\r\n\r\nThe C. elegans 3D model this was derived from was produced by Dr. Christian Grove and Dr. Paul Sternberg at the VirtualWorm project (WormBase, CalTech) and released into the public domain. You can visit the VirtualWorm home page at http://caltech.wormbase.org/virtualworm/ .\r\n\r\nFor details on running this neuroConstruct project see: https://github.com/openworm/OpenWorm/wiki/Running-the-C.-elegans-model-in-neuroConstruct.\r\n\r\nThis is a **work in progress**. Please [get in contact](http://www.openworm.org/contacts.html) for more information.\r\n",
"tags": [
{
- "id": 181,
- "tag": "DANDI"
+ "id": 18,
+ "tag": "Blender"
},
{
- "id": 5007,
- "tag": "DANDI:001210"
+ "id": 19,
+ "tag": "C. elegans"
},
{
- "id": 194,
- "tag": "Mus musculus - House mouse"
+ "id": 20,
+ "tag": "Nervous system"
},
{
- "id": 24,
- "tag": "NWB"
+ "id": 6,
+ "tag": "Network model"
+ },
+ {
+ "id": 7,
+ "tag": "OSBv1"
+ },
+ {
+ "id": 21,
+ "tag": "OpenWorm"
+ },
+ {
+ "id": 44,
+ "tag": "Whole brain model"
}
],
- "timestamp_created": "2025-08-14 11:11:17.326448+00:00",
+ "timestamp_created": "2026-07-27 16:26:56+00:00",
"timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/001210/draft",
+ "uri": "https://github.com/openworm/CElegansNeuroML",
"user": {
- "email": "info@opensourcebrain.org",
+ "email": "osbadmin@opensourcebrain.org",
"first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
+ "id": "897f31bd-b8a4-49bb-97e1-309a12ee6dac",
"last_name": "Admin",
"username": "osbadmin"
},
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
+ "user_id": "897f31bd-b8a4-49bb-97e1-309a12ee6dac"
},
- "3560": {
+ "22": {
"auto_sync": true,
- "content_types": "experimental",
+ "content_types": "modeling",
"content_types_list": [
- "experimental"
+ "modeling"
],
- "default_context": "draft",
- "id": 3560,
- "name": "Neurovascular impulse response function (IRF) during spontaneous activity differentially reflects intrinsic neuromodulation across cortical regions",
- "repository_type": "dandi",
- "summary": "Ascending neuromodulatory projections from deep brain nuclei generate internal brain states that differentially engage specific neuronal cell types. Because neurovascular coupling is cell-type specific and neuromodulatory transmitters have vasoactive properties, we hypothesized that the impulse response function (IRF) linking spontaneous neuronal activity with hemodynamics would depend on neuromodulation. Here, we use widefield cortical imaging to observe the resting state relationship between population level neuronal Ca2+ activity, fluctuations in oxygenation and concentration of hemoglobin, and release of the vasoactive neuromodulators Norepinephrine (NE) and Acetylcholine (ACh). First, the IRF linking neuronal activity and the hemodynamic response failed to predict hemodynamic fluctuations during periods marked by higher arousal (high NE and pupil diameter). Second, hemodynamic fluctuations were well predicted by a regression model factoring in both Ca2+ activity and NE release. Third, Ca2+ and hemodynamic functional connectivity patterns diverged during periods of high arousal. Without accounting for NE neuromodulation and the associated vasoconstriction, diminished hemodynamic coherence, commonly referred to as \u201cfunctional (dys)connectivity\u201d in BOLD fMRI studies, can be falsely interpreted as neuronal desynchronizations.",
+ "default_context": "master",
+ "id": 22,
+ "name": "Cerebellar Nucleus Neuron - Steuber et al. 2011",
+ "repository_type": "github",
+ "summary": "\r\n\r\n[Deep cerebellar nucleus neuron](http://neurolex.org/wiki/Category:Cerebellum_nucleus_reciprocal_projections_neuron) model from: Determinants of synaptic integration and heterogeneity in rebound firing explored with data-driven models of deep cerebellar nucleus cells. Steuber V, Schultheiss NW, Silver RA, De Schutter E, Jaeger D. J Comput Neurosci. 2011 Jun;30(3):633-58\r\n",
"tags": [
{
- "id": 5008,
- "tag": "Acetylcholine"
- },
- {
- "id": 181,
- "tag": "DANDI"
+ "id": 45,
+ "tag": "Cerebellar Nucleus Neuron"
},
{
- "id": 5009,
- "tag": "DANDI:001211"
+ "id": 46,
+ "tag": "Cerebellum"
},
{
- "id": 5010,
- "tag": "Functional connectivity"
+ "id": 3,
+ "tag": "Detailed cell model"
},
{
- "id": 5011,
- "tag": "Hemodynamics"
+ "id": 4,
+ "tag": "GENESIS"
},
{
- "id": 194,
- "tag": "Mus musculus - House mouse"
+ "id": 14,
+ "tag": "Goldman-Hodgkin-Katz current"
},
{
- "id": 24,
- "tag": "NWB"
+ "id": 7,
+ "tag": "OSBv1"
},
{
- "id": 5012,
- "tag": "Neurovascular coupling"
+ "id": 9,
+ "tag": "Rodent"
},
{
- "id": 5013,
- "tag": "Norepinephrine"
+ "id": 10,
+ "tag": "neuroConstruct"
}
],
- "timestamp_created": "2025-08-14 11:11:18.791530+00:00",
+ "timestamp_created": "2026-07-27 16:26:56+00:00",
"timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/001211/draft",
+ "uri": "https://github.com/OpenSourceBrain/CerebellarNucleusNeuron",
"user": {
- "email": "info@opensourcebrain.org",
+ "email": "osbadmin@opensourcebrain.org",
"first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
+ "id": "897f31bd-b8a4-49bb-97e1-309a12ee6dac",
"last_name": "Admin",
"username": "osbadmin"
},
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
+ "user_id": "897f31bd-b8a4-49bb-97e1-309a12ee6dac"
},
- "3561": {
+ "23": {
"auto_sync": true,
- "content_types": "experimental",
+ "content_types": "modeling",
"content_types_list": [
- "experimental"
+ "modeling"
],
- "default_context": "0.241023.0931",
- "id": 3561,
- "name": "Individualized Target Selection of Closed-loop Electrical Stimulation for the Treatment of Spontaneous Temporal Lobe Epilepsy.",
- "repository_type": "dandi",
- "summary": "We provided a comprehensive dataset from a study involving 4-channel long-term brain electrophysiological recordings from 7 pilocarpine-treated rats, each subjected to 4 baseline and 4 stimulation groups. Each group was monitored over a period of 5 to 10 days, with a minimum of 6 spontaneous seizures recorded. The baseline groups captured spontaneous seizures without therapeutic stimulation, while the stimulation groups included spontaneous seizures with therapeutic intervention. Stimulation targets were randomly assigned and not repeated across groups, ensuring independent assessments of treatment effects. The LFP data were saved in MATLAB, adhering to the Neurodata Without Borders (NWB) standard, and are available on the DANDI Archive. This dataset facilitates the evaluation of brain network dynamics and the effects of different stimulation targets on individual responses throughout the study, highlighting the varying effects of stimulation across different individuals.",
+ "default_context": "master",
+ "id": 23,
+ "name": "Cerebellar Golgi Cell - Solinas et al. 2007",
+ "repository_type": "github",
+ "summary": "Multicompartmental model of cerebellar Golgi cell from: Solinas S, Forti L, Cesana E, Mapelli J, De Schutter E, D\u2019Angelo E. **Computational reconstruction of pacemaking and intrinsic electroresponsiveness in cerebellar Golgi cells**. [Front Cell Neurosci. 2007;1:2](http://journal.frontiersin.org/article/10.3389/neuro.03.002.2007/abstract). \r\n\r\nBased on implementation in NEURON taken from: http://senselab.med.yale.edu/modeldb/ShowModel.asp?model=112685.\r\n",
"tags": [
{
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 5014,
- "tag": "DANDI:001212"
- },
- {
- "id": 24,
- "tag": "NWB"
- },
- {
- "id": 205,
- "tag": "Rattus norvegicus - Norway rat"
+ "id": 46,
+ "tag": "Cerebellum"
},
{
- "id": 4892,
- "tag": "local field potential"
+ "id": 3,
+ "tag": "Detailed cell model"
},
{
- "id": 4893,
- "tag": "multi-site"
+ "id": 47,
+ "tag": "Golgi cell"
},
{
- "id": 22,
- "tag": "neurophysiology"
+ "id": 16,
+ "tag": "NEURON"
},
{
- "id": 23,
- "tag": "neurosurgery"
+ "id": 7,
+ "tag": "OSBv1"
},
{
- "id": 5015,
- "tag": "spontaneous seizures"
+ "id": 9,
+ "tag": "Rodent"
},
{
- "id": 4895,
- "tag": "temporal lobe epilepsy"
+ "id": 10,
+ "tag": "neuroConstruct"
}
],
- "timestamp_created": "2025-08-14 11:11:20.397175+00:00",
+ "timestamp_created": "2026-07-27 16:26:56+00:00",
"timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/001212/draft",
+ "uri": "https://github.com/OpenSourceBrain/SolinasEtAl-GolgiCell",
"user": {
- "email": "info@opensourcebrain.org",
+ "email": "osbadmin@opensourcebrain.org",
"first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
+ "id": "897f31bd-b8a4-49bb-97e1-309a12ee6dac",
"last_name": "Admin",
"username": "osbadmin"
},
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
+ "user_id": "897f31bd-b8a4-49bb-97e1-309a12ee6dac"
},
- "3562": {
+ "24": {
"auto_sync": true,
- "content_types": "experimental",
+ "content_types": "modeling",
"content_types_list": [
- "experimental"
+ "modeling"
],
- "default_context": "draft",
- "id": 3562,
- "name": "FALCON Benchmark B1 broadband: zebra finch RA Neuropixels recordings during birdsong",
- "repository_type": "dandi",
- "summary": "This dataset is intended to supplement the main B1 datasets, which contains unsorted spike times, audio recordings, and audio spectrograms from a zebra finch songbird during natural vocal behavior. Neural activity was recorded using Neuropixels probes from premotor and motor nuclei. This dataset can be found at: https://dandiarchive.org/dandiset/001046\n\nThis supplementary dataset contains the unprocessed broadband recordings.\n\nAs part of the FALCON challenge, dataset files are released in three ways. The held-in-calib data includes many trials of data intended for calibration of decoders in the FALCON challenge. The held-in-minival data is a small subset of the held-in-calib data intended for FALCON models to validate submission format. Lastly, held-out-calib data are separate sessions of data from held-in-calib, but have much fewer trials, intended to be used for few-shot recalibration. Please bear in mind these factors if making use of this dataset for purposes outside of the FALCON Benchmark. Each dataset split is considered one \"subject\" by the DANDI repository; only data from one songbird is included.",
+ "default_context": "master",
+ "id": 24,
+ "name": "ChannelWorm",
+ "repository_type": "github",
+ "summary": "An OpenWorm repository to integrate data, information, scripts, and models of ion channels in C. elegans",
"tags": [
{
- "id": 181,
- "tag": "DANDI"
+ "id": 7,
+ "tag": "OSBv1"
},
{
- "id": 5016,
- "tag": "DANDI:001245"
+ "id": 19,
+ "tag": "C. elegans"
},
{
- "id": 24,
- "tag": "NWB"
+ "id": 21,
+ "tag": "OpenWorm"
},
{
- "id": 4902,
- "tag": "Taeniopygia guttata - Zebra finch"
+ "id": 48,
+ "tag": "Ion channels"
}
],
- "timestamp_created": "2025-08-14 11:11:21.949488+00:00",
+ "timestamp_created": "2026-07-29 10:14:19+00:00",
"timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/001245/draft",
+ "uri": "https://github.com/openworm/ChannelWorm",
"user": {
- "email": "info@opensourcebrain.org",
+ "email": "osbadmin@opensourcebrain.org",
"first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
+ "id": "897f31bd-b8a4-49bb-97e1-309a12ee6dac",
"last_name": "Admin",
"username": "osbadmin"
},
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
+ "user_id": "897f31bd-b8a4-49bb-97e1-309a12ee6dac"
},
- "3563": {
+ "25": {
"auto_sync": true,
- "content_types": "experimental",
+ "content_types": "modeling",
"content_types_list": [
- "experimental"
+ "modeling"
],
- "default_context": "draft",
- "id": 3563,
- "name": "Phase Sensitive Optical Coherence Tomography Local Axis Orientation",
- "repository_type": "dandi",
- "summary": "Intensity, retardance, and orientation contrasts of phase sensitive optical coherence tomography (PSOCT).",
+ "default_context": "master",
+ "id": 25,
+ "name": "Computational Neuroscience Ontology Showcase",
+ "repository_type": "github",
+ "summary": "\r\nScripts for interacting with the Computational Neuroscience Ontology:\r\nhttp://www.incf.org/programs/modeling/cno\r\n\r\nSee the [[Wiki]] for more details.\r\n",
"tags": [
{
- "id": 181,
- "tag": "DANDI"
+ "id": 7,
+ "tag": "OSBv1"
+ },
+ {
+ "id": 49,
+ "tag": "Metadata"
+ },
+ {
+ "id": 50,
+ "tag": "Model annotation"
+ },
+ {
+ "id": 51,
+ "tag": "Ontology"
},
{
- "id": 5017,
- "tag": "DANDI:001246"
+ "id": 52,
+ "tag": "Python"
}
],
- "timestamp_created": "2025-08-14 11:11:23.363581+00:00",
+ "timestamp_created": "2026-07-29 10:14:19+00:00",
"timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/001246/draft",
+ "uri": "https://github.com/OpenSourceBrain/CNOShowcase",
"user": {
- "email": "info@opensourcebrain.org",
+ "email": "osbadmin@opensourcebrain.org",
"first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
+ "id": "897f31bd-b8a4-49bb-97e1-309a12ee6dac",
"last_name": "Admin",
"username": "osbadmin"
},
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
+ "user_id": "897f31bd-b8a4-49bb-97e1-309a12ee6dac"
},
- "3564": {
+ "26": {
"auto_sync": true,
- "content_types": "experimental",
+ "content_types": "modeling",
"content_types_list": [
- "experimental"
+ "modeling"
],
- "default_context": "draft",
- "id": 3564,
- "name": "Standardized Neuromorphology Prototypes",
- "repository_type": "dandi",
- "summary": "This Dandiset provides examples to drive standardization efforts throughout neurophysiology.",
+ "default_context": "master",
+ "id": 26,
+ "name": "ConnectivityShowcase",
+ "repository_type": "github",
+ "summary": "",
"tags": [
{
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 5018,
- "tag": "DANDI:001248"
- },
- {
- "id": 194,
- "tag": "Mus musculus - House mouse"
+ "id": 7,
+ "tag": "OSBv1"
},
{
- "id": 24,
- "tag": "NWB"
+ "id": 43,
+ "tag": "Multiple"
}
],
- "timestamp_created": "2025-08-14 11:11:24.980565+00:00",
+ "timestamp_created": "2026-07-29 10:14:20+00:00",
"timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/001248/draft",
+ "uri": "https://github.com/OpenSourceBrain/ConnectivityShowcase",
"user": {
- "email": "info@opensourcebrain.org",
+ "email": "osbadmin@opensourcebrain.org",
"first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
+ "id": "897f31bd-b8a4-49bb-97e1-309a12ee6dac",
"last_name": "Admin",
"username": "osbadmin"
},
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
+ "user_id": "897f31bd-b8a4-49bb-97e1-309a12ee6dac"
},
- "3565": {
+ "27": {
"auto_sync": true,
- "content_types": "experimental",
+ "content_types": "modeling",
"content_types_list": [
- "experimental"
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],
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+ "tag": "Antennal lobe"
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}
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"timestamp_updated": "---",
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],
- "timestamp_created": "2025-08-14 11:11:33.847315+00:00",
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+ "tag": "GENESIS"
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}
],
- "timestamp_created": "2025-08-14 11:11:35.335777+00:00",
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+ "default_context": "master",
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- },
- {
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- "tag": "DANDI:001271"
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+ "tag": "Generic"
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+ "id": 68,
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}
],
- "timestamp_created": "2025-08-14 11:11:36.831530+00:00",
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- "tag": "DANDI"
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+ "default_context": "master",
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+ "name": "Functional Balanced Network",
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- "summary": "This experimental series aimed to visualize and characterize plasma membrane (PM) polarization dynamics in hippocampal neurons exposed to 2 kHz sine waves or 2 kHz sine waves modulated at 100 Hz or 154 Hz. Neurons were pre-loaded with FluoVolt potentiometric dye to enable visualization of membrane polarization changes. This study was partially supported by the NIH Brain Initiative (NEI R21EY034803).",
- "tags": [
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- "tag": "DANDI"
+ "id": 9,
+ "tag": "Rodent"
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+ "tag": "NEST"
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+ "id": 71,
+ "tag": "Visual system"
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],
- "timestamp_created": "2025-08-14 11:11:41.194917+00:00",
+ "timestamp_created": "2026-07-29 10:18:34+00:00",
"timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/001274/draft",
+ "uri": "https://github.com/sdrsd/SadehRotter_2015_PLOS_ComputBiol",
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- "summary": "This dataset contains neurophysiology data collected from two primates during a mental navigation task associated with a previously published study (https://doi.org/10.1038/s41586-024-07557-z). Data from the entorhinal cortex is open-sourced here: https://doi.org/10.48324/dandi.000897/0.240605.1710",
+ "default_context": "master",
+ "id": 39,
+ "name": "Geppetto Showcase",
+ "repository_type": "github",
+ "summary": "\r\n\r\nGeppetto is a web-based multi-algorithm, multi-scale simulation platform engineered to support the simulation of complex biological systems and their surrounding environment.\r\n\r\nExamples of NeuroML 2 files along with scripts for visualising/executing them in Geppetto (http://www.geppetto.org).\r\n",
"tags": [
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+ "tag": "NeuroML"
},
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+ "id": 73,
+ "tag": "Simulator showcase"
}
],
- "timestamp_created": "2025-08-14 11:11:42.729331+00:00",
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+ "uri": "https://github.com/openworm/org.geppetto.samples",
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+ "default_context": "master",
+ "id": 40,
+ "name": "GHK & Nernst examples",
+ "repository_type": "github",
+ "summary": "Examples of cell models with currents using the [GHK flux equation](http://en.wikipedia.org/wiki/GHK_flux_equation), or using\n [Nernst\u2019s Equation](http://en.wikipedia.org/wiki/Nernst_equation) for the reversal potential in NeuroML 2 and a number of other formats.\n\nSee the [[Wiki]] for more details.\n",
"tags": [
{
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- {
- "id": 5062,
- "tag": "DANDI:001276"
+ "id": 7,
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{
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- "tag": "Mus musculus - House mouse"
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+ "tag": "Goldman-Hodgkin-Katz current"
},
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+ "tag": "NEURON"
}
],
- "timestamp_created": "2025-08-14 11:11:44.203900+00:00",
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+ "uri": "https://github.com/OpenSourceBrain/ghk-nernst",
"user": {
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- "summary": "Experiments were conducted using a four-electrode array with an inter-electrode spacing of 10 mm. The electrode array was positioned at the bottom of the well plate (0 mm). Pulse durations of 300 ns, 600 ns, and 900 ns were tested. Depending on the pulse duration, the protocol consisted of 18 packets for 300 ns pulses, 9 packets for 600 ns pulses, or 6 packets for 900 ns pulses, delivered at frequencies of 0.4 MHz, 0.2 MHz, and 0.14 MHz, respectively. Each protocol was repeated twice at a frequency of 1 Hz. Cell monolayer integrity was assessed using Hoechst staining, while membrane permeability was evaluated with YoPro-1. This work was partially supported by NIH grant 1R21EY034258.",
+ "default_context": "development",
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+ "name": "Golgi cell network Gurnani et al",
+ "repository_type": "github",
+ "summary": "Test",
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+ "tag": "OSBv1"
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+ "tag": "Cerebellum"
},
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+ "tag": "Golgi cell"
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],
- "timestamp_created": "2025-08-14 11:11:45.624928+00:00",
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"timestamp_updated": "---",
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+ "uri": "https://github.com/sanjayankur31/GoC_Network_Sim_BehInputs",
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},
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+ "default_context": "master",
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+ "name": "Golgi Cell Dendritic Gap Junctions - Szoboszlay et al. 2016",
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- "tag": "rat"
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+ "tag": "Cerebellum"
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],
- "timestamp_created": "2025-08-14 11:11:47.123442+00:00",
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- "summary": "Patch-clamp recordings of Layer 2/3 pyramidal cells in the human neocortex from various life stages. Data comes from Gabor Tamas Lab (HUN-REN-SZTE Research Group for Cortical Microcircuits; University of Szeged, Hungary).",
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+ "name": "GPU Based Simulation Showcase",
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- "tag": "Age dependence"
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- "tag": "In vitro"
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- "tag": "Layer 2/3 pyramidal cells"
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+ "tag": "Hardware based simulation"
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+ "id": 74,
+ "tag": "GPU"
}
],
- "timestamp_created": "2025-08-14 11:11:48.880586+00:00",
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"timestamp_updated": "---",
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+ "uri": "https://github.com/OpenSourceBrain/GPUShowcase",
"user": {
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"last_name": "Admin",
"username": "osbadmin"
},
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- "summary": "These are Neuropixels recordings made in non-human primates during deep probe insertions, collected by Eric Trautmann with guidance from Mike Shadlen and Mark Churchland. They are analyzed in Figure 4 and Supplementary Figure 5 of Windolf et al., \"DREDge: robust motion correction for high-density extracellular recordings across species\", to appear in Nature Methods. Detailed methodological information about methods used to create these recordings is available in that reference or the preprint (https://www.biorxiv.org/content/10.1101/2023.10.24.563768v1) under Datasets. See also Trautmann et al., \"Large-scale brain-wide neural recording in nonhuman primates\" (https://www.biorxiv.org/content/10.1101/2023.02.01.526664v1).",
+ "default_context": "master",
+ "id": 44,
+ "name": "Granule Cell Layer - Maex and De Schutter 1998",
+ "repository_type": "github",
+ "summary": "",
"tags": [
{
- "id": 181,
- "tag": "DANDI"
+ "id": 46,
+ "tag": "Cerebellum"
},
{
- "id": 5071,
- "tag": "DANDI:001282"
+ "id": 4,
+ "tag": "GENESIS"
},
{
- "id": 210,
- "tag": "Macaca mulatta - Rhesus monkey"
+ "id": 65,
+ "tag": "NMDAR synapse"
},
{
- "id": 24,
- "tag": "NWB"
- }
- ],
- "timestamp_created": "2025-08-14 11:11:50.279882+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/001282/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
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- "last_name": "Admin",
- "username": "osbadmin"
- },
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- "default_context": "0.250701.1610",
- "id": 3582,
- "name": "NG-CANCAN Remote Targeting Electroporation: Focused Cell Electroporation and Ablation in a Pseudo-3D Model",
- "repository_type": "dandi",
- "summary": "Experiments were conducted using a four-electrode array with an inter-electrode spacing of 10 mm. A pseudo-3D model was created by elevating the electrode array 0 mm, 1 mm, or 2 mm above the monolayer. Each pulse was 600 ns in duration, and the protocol consisted of nine packets of pulses delivered at 0.2 MHz, repeated twice at 1 Hz. Cell monolayer integrity was assessed with Hoechst staining, and membrane permeability was evaluated using YoPro-1. After 2 hours, cells were stained with propidium iodide to assess cell death. This work was partially supported by NIH grant 1R21EY034258.",
- "tags": [
+ "id": 6,
+ "tag": "Network model"
+ },
{
- "id": 181,
- "tag": "DANDI"
+ "id": 7,
+ "tag": "OSBv1"
},
{
- "id": 5072,
- "tag": "DANDI:001284"
+ "id": 9,
+ "tag": "Rodent"
},
{
- "id": 194,
- "tag": "Mus musculus - House mouse"
+ "id": 66,
+ "tag": "Single compartment conductance based neuron model"
},
{
- "id": 24,
- "tag": "NWB"
+ "id": 10,
+ "tag": "neuroConstruct"
}
],
- "timestamp_created": "2025-08-14 11:11:51.652616+00:00",
+ "timestamp_created": "2026-07-29 10:18:36+00:00",
"timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/001284/draft",
+ "uri": "https://github.com/OpenSourceBrain/GranCellLayer",
"user": {
- "email": "info@opensourcebrain.org",
+ "email": "osbadmin@opensourcebrain.org",
"first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
+ "id": "897f31bd-b8a4-49bb-97e1-309a12ee6dac",
"last_name": "Admin",
"username": "osbadmin"
},
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
+ "user_id": "897f31bd-b8a4-49bb-97e1-309a12ee6dac"
},
- "3583": {
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"auto_sync": true,
- "content_types": "experimental",
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],
- "default_context": "0.250110.2125",
- "id": 3583,
- "name": "EEG Anesthesia Dataset",
- "repository_type": "dandi",
- "summary": "The experimental protocol for the dataset is described in detail in Purdon PL, Pierce ET, Mukamel EA, et al. Electroencephalogram signatures of loss and recovery of consciousness from propofol. Proc Natl Acad Sci U S A. 2013;110(12):E1142-E1151, doi:10.1073/pnas.1221180110. \nIn summary, ten healthy, consenting volunteers aged 18\u201336 years participated in a study approved by the MGH Human Research Committee. The study examined induction and emergence from propofol anesthesia using a computer-controlled infusion system (StanPump) based on the Schnider pharmacokinetic-pharmacodynamic model. Subjects performed a behavioral task to identify the points of loss and recovery of consciousness while 64-channel EEG recordings were obtained. The protocol began with a 20-minute baseline EEG recording. Propofol was then administered in increasing effect-site concentrations, with each concentration maintained for 14 minutes, followed by decreasing effect-site concentrations designed to bracket the point of loss of consciousness. Each declining concentration was also held for 14 minutes. During all phases of the protocol\u2014baseline, increasing, and decreasing concentrations\u2014subjects performed a yes-no behavioral task every 4 seconds to document the times of loss and recovery of consciousness. After the propofol infusion was stopped, an additional 20-minute baseline EEG and behavioral recording period was conducted. Throughout the study, participants were instructed to keep their eyes closed to minimize eye-blink artifacts.\n",
+ "default_context": "master",
+ "id": 45,
+ "name": "I&F granule cell model - Rothman & Piasini",
+ "repository_type": "github",
+ "summary": "This project contains an integrate and fire model of the cerebellar granule cell and a simple model of the mossy fibre to granule cell synapse. The cell model (IaF\\_GrC.nml) is the average (ie the one whose parameters have the average value) of the model population developed by Jason Rothman and published in Schwartz et, J Neurosci (2012). The synaptic model is based on the one used in that same paper, but it has been developed further to improve the fit to the experimental data and to ensure LEMS/NeuroMLv2 compatibility.\n",
"tags": [
{
- "id": 5073,
- "tag": "Anesthesia"
+ "id": 46,
+ "tag": "Cerebellum"
},
{
- "id": 181,
- "tag": "DANDI"
+ "id": 75,
+ "tag": "Granule cell"
},
{
- "id": 5074,
- "tag": "DANDI:001285"
+ "id": 76,
+ "tag": "Igor Pro"
},
{
- "id": 262,
- "tag": "Homo sapiens - Human"
+ "id": 26,
+ "tag": "Integrate and fire neuron"
},
{
- "id": 24,
- "tag": "NWB"
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- ],
- "timestamp_created": "2025-08-14 11:11:53.086234+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/001285/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
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- "default_context": "draft",
- "id": 3584,
- "name": "IronTract Challenge - Public dMRI data",
- "repository_type": "dandi",
- "summary": "The data and steps involved in the challenge are described in Maffei et al., 2022 - https://www.sciencedirect.com/science/article/pii/S1053811922004463.",
- "tags": [
+ "id": 7,
+ "tag": "OSBv1"
+ },
{
- "id": 181,
- "tag": "DANDI"
+ "id": 9,
+ "tag": "Rodent"
},
{
- "id": 5075,
- "tag": "DANDI:001289"
+ "id": 10,
+ "tag": "neuroConstruct"
}
],
- "timestamp_created": "2025-08-14 11:11:54.836886+00:00",
+ "timestamp_created": "2026-07-29 10:18:36+00:00",
"timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/001289/draft",
+ "uri": "https://github.com/OpenSourceBrain/GranCellRothmanIf",
"user": {
- "email": "info@opensourcebrain.org",
+ "email": "osbadmin@opensourcebrain.org",
"first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
+ "id": "897f31bd-b8a4-49bb-97e1-309a12ee6dac",
"last_name": "Admin",
"username": "osbadmin"
},
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
+ "user_id": "897f31bd-b8a4-49bb-97e1-309a12ee6dac"
},
- "3585": {
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"auto_sync": true,
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],
- "default_context": "0.250528.1957",
- "id": 3585,
- "name": "Brain-wide mouse electrophysiology during aversive stimuli and ketamine",
- "repository_type": "dandi",
- "summary": "Brain-wide electrophysiology associated with Kauvar*, Richman*, Liu* et al. Science (2025). https://doi.org/10.1126/science.adt3971",
+ "default_context": "master",
+ "id": 46,
+ "name": "Cerebellar Granule Cell - Solinas et al. 2010",
+ "repository_type": "github",
+ "summary": "\r\nInitial version of Granule cell from: Solinas S., Nieus T, d\u2019Angelo E. (2010) **A Realistic Large-Scale Model of the Cerebellum Granular Layer Predicts Circuit Spatio-Temporal Filtering Properties**. Front Cell Neurosci. 2010;4:12.\r\n\r\nFor more information, see the [[Wiki]]\r\n\r\n[](https://travis-ci.com/OpenSourceBrain/GranCellSolinasEtAl10)\r\n",
"tags": [
{
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 5076,
- "tag": "DANDI:001326"
+ "id": 46,
+ "tag": "Cerebellum"
},
{
- "id": 457,
- "tag": "Electrophysiology"
+ "id": 75,
+ "tag": "Granule cell"
},
{
- "id": 5077,
- "tag": "Ketamine"
+ "id": 16,
+ "tag": "NEURON"
},
{
- "id": 79,
- "tag": "Mouse"
+ "id": 65,
+ "tag": "NMDAR synapse"
},
{
- "id": 194,
- "tag": "Mus musculus - House mouse"
+ "id": 7,
+ "tag": "OSBv1"
},
{
- "id": 24,
- "tag": "NWB"
+ "id": 9,
+ "tag": "Rodent"
},
{
- "id": 365,
- "tag": "Neuropixels"
+ "id": 66,
+ "tag": "Single compartment conductance based neuron model"
},
{
- "id": 5078,
- "tag": "Timescale"
+ "id": 10,
+ "tag": "neuroConstruct"
}
],
- "timestamp_created": "2025-08-14 11:11:56.657817+00:00",
+ "timestamp_created": "2026-07-29 10:18:37+00:00",
"timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/001326/draft",
+ "uri": "https://github.com/OpenSourceBrain/GranCellSolinasEtAl10",
"user": {
- "email": "info@opensourcebrain.org",
+ "email": "osbadmin@opensourcebrain.org",
"first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
+ "id": "897f31bd-b8a4-49bb-97e1-309a12ee6dac",
"last_name": "Admin",
"username": "osbadmin"
},
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
+ "user_id": "897f31bd-b8a4-49bb-97e1-309a12ee6dac"
},
- "3586": {
+ "47": {
"auto_sync": true,
- "content_types": "experimental",
+ "content_types": "modeling",
"content_types_list": [
- "experimental"
+ "modeling"
],
- "default_context": "0.250327.2220",
- "id": 3586,
- "name": "Parkinson's Electrophysiological Signal Dataset (PESD)",
- "repository_type": "dandi",
- "summary": "The dataset contains electrophysiological signals from both healthy and parkinsonian subjects. We generated two types of samples from each group. The parkinsonian signals show a relatively high power density at the beta frequency (13 to 30 Hz). Thus, the beta oscillations (13 to 30 Hz) in the subthalamic nucleus (STN) are typically used as the pathological biomarkers for PD symptoms. Each sample includes two types of signals: Beta Average Rectified Voltage (ARV) and Local Field Potential (LFP) from the Subthalamic Nucleus (STN). The ARV signals are in the frequency domain and LFP signals are in the time domain.\n\nBeta ARV Signal: The controller beta values are determined by calculating the Average Rectified Value (ARV) of the beta band. This is achieved by fully rectifying the filtered LFP signal using a fourth-order Chebyshev band-pass filter with an 8 Hz bandwidth, centered around the peak of the LFP power spectrum. Local Field Potential (LFP) - STN: Local Field Potentials are derived from the synchronized activity of neuron populations between the cortex, STN, and thalamus.\n\nMore details can be found in our article named, \u201cPreliminary Results of Neuromorphic Controller Design and a Parkinson's Disease Dataset Building for Closed-Loop Deep Brain Stimulation\u201d, available at https://arxiv.org/abs/2407.17756",
+ "default_context": "master",
+ "id": 47,
+ "name": "Granular Layer Network Model - Solinas, Nieus & D'Angelo 2010",
+ "repository_type": "github",
+ "summary": "Cerebellar granular layer network model from: Solinas S., Nieus T, d'Angelo E. (2010) [A Realistic Large-Scale Model of the Cerebellum Granular Layer Predicts Circuit Spatio-Temporal Filtering Properties](http://journal.frontiersin.org/article/10.3389/fncel.2010.00012/abstract). Front Cell Neurosci. 2010;4:12.",
"tags": [
{
- "id": 181,
- "tag": "DANDI"
+ "id": 6,
+ "tag": "Network model"
+ },
+ {
+ "id": 7,
+ "tag": "OSBv1"
},
{
- "id": 5079,
- "tag": "DANDI:001333"
+ "id": 9,
+ "tag": "Rodent"
},
{
- "id": 262,
- "tag": "Homo sapiens - Human"
+ "id": 16,
+ "tag": "NEURON"
},
{
- "id": 24,
- "tag": "NWB"
+ "id": 46,
+ "tag": "Cerebellum"
}
],
- "timestamp_created": "2025-08-14 11:11:58.311683+00:00",
+ "timestamp_created": "2026-07-29 10:18:37+00:00",
"timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/001333/draft",
+ "uri": "https://github.com/OpenSourceBrain/GranularLayerSolinasNieusDAngelo2010",
"user": {
- "email": "info@opensourcebrain.org",
+ "email": "osbadmin@opensourcebrain.org",
"first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
+ "id": "897f31bd-b8a4-49bb-97e1-309a12ee6dac",
"last_name": "Admin",
"username": "osbadmin"
},
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
+ "user_id": "897f31bd-b8a4-49bb-97e1-309a12ee6dac"
},
- "3587": {
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"auto_sync": true,
- "content_types": "experimental",
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],
- "default_context": "0.250729.1519",
- "id": 3587,
- "name": "Neuromodulation in neural organoids with shell MEAs",
- "repository_type": "dandi",
- "summary": "Neural organoids (NOs) have emerged as important tissue engineering models for brain sciences and biocomputing. Establishing reliable relationships between stimulation and recording traces of electrical activity is essential to monitor the functionality of NOs, especially as it relates to realizing biocomputing paradigms such as reinforcement learning or stimulus discrimination. While researchers have demonstrated neuromodulation in NOs, they have primarily used 2D microelectrode arrays (MEAs) with limited access to the entire 3D contour of the NOs. Here, we report neuromodulation using tiny mimics of macroscale EEG caps or shell MEAs. Specifically, we observe that stimulating current within a specific range (20 to 30 \u00b5A) induced a statistically significant increase in neuron firing rate when comparing the activity five seconds before and after stimulation. We observed neuromodulatory behavior using both three- and 16-electrode shells and could generate 3D spatiotemporal maps of neuromodulatory activity around the surface of the NO. Our studies demonstrate a methodology for investigating 3D spatiotemporal neuromodulation in organoids of broad relevance to biomedical engineering and biocomputing. \nThis dataset includes recordings from 3 and 16-channel Shell MEAs from neural organoids, including baselines and in response to stimulation. ",
+ "default_context": "master",
+ "id": 48,
+ "name": "Granule Cell Layer - Piasini et al. ",
+ "repository_type": "github",
+ "summary": "",
"tags": [
{
- "id": 181,
- "tag": "DANDI"
+ "id": 77,
+ "tag": "AMPAR synapse"
},
{
- "id": 5080,
- "tag": "DANDI:001336"
+ "id": 46,
+ "tag": "Cerebellum"
},
{
- "id": 262,
- "tag": "Homo sapiens - Human"
+ "id": 26,
+ "tag": "Integrate and fire neuron"
},
{
- "id": 24,
- "tag": "NWB"
+ "id": 65,
+ "tag": "NMDAR synapse"
+ },
+ {
+ "id": 6,
+ "tag": "Network model"
+ },
+ {
+ "id": 7,
+ "tag": "OSBv1"
},
{
- "id": 5081,
- "tag": "local field potentials"
+ "id": 28,
+ "tag": "Point neuron network"
},
{
- "id": 5082,
- "tag": "microelectrode array"
+ "id": 9,
+ "tag": "Rodent"
},
{
- "id": 5083,
- "tag": "neural organoid"
+ "id": 67,
+ "tag": "Synaptic plasticity"
},
{
- "id": 4985,
- "tag": "single units"
+ "id": 10,
+ "tag": "neuroConstruct"
}
],
- "timestamp_created": "2025-08-14 11:11:59.811708+00:00",
+ "timestamp_created": "2026-07-29 10:18:37+00:00",
"timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/001336/draft",
+ "uri": "https://github.com/epiasini/BillingsEtAl2014_GCL_Models",
"user": {
- "email": "info@opensourcebrain.org",
+ "email": "osbadmin@opensourcebrain.org",
"first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
+ "id": "897f31bd-b8a4-49bb-97e1-309a12ee6dac",
"last_name": "Admin",
"username": "osbadmin"
},
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
+ "user_id": "897f31bd-b8a4-49bb-97e1-309a12ee6dac"
},
- "3588": {
+ "49": {
"auto_sync": true,
- "content_types": "experimental",
+ "content_types": "modeling",
"content_types_list": [
- "experimental"
+ "modeling"
],
- "default_context": "0.250221.0527",
- "id": 3588,
- "name": "Nucleus accumbens dopamine release reflects Bayesian inference during instrumental learning",
- "repository_type": "dandi",
- "summary": "Dataset associated with https://www.biorxiv.org/content/10.1101/2023.11.10.566306v2",
+ "default_context": "master",
+ "id": 49,
+ "name": "Cerebellar Granule Cell - Maex De Schutter 1998",
+ "repository_type": "github",
+ "summary": "\r\nA project illustrating the behaviour of the cerebellar granule cell model from: Maex, R and De Schutter, E. [Synchronization of Golgi and Granule Cell Firing in a Detailed Network Model of the Cerebellar Granule Cell Layer](http://www.ncbi.nlm.nih.gov/pubmed/9819260) J Neurophysiol, Nov 1998; 80: 2521 - 2537. \r\n\r\nBased on scripts obtained from: http://www.tnb.ua.ac.be/models/network.shtml.\r\n\r\nFor more details see the [[Wiki]].\r\n\r\n[](https://travis-ci.org/OpenSourceBrain/GranuleCell)\r\n",
"tags": [
{
- "id": 181,
- "tag": "DANDI"
+ "id": 46,
+ "tag": "Cerebellum"
+ },
+ {
+ "id": 4,
+ "tag": "GENESIS"
+ },
+ {
+ "id": 75,
+ "tag": "Granule cell"
+ },
+ {
+ "id": 7,
+ "tag": "OSBv1"
},
{
- "id": 5084,
- "tag": "DANDI:001340"
+ "id": 9,
+ "tag": "Rodent"
},
{
- "id": 194,
- "tag": "Mus musculus - House mouse"
+ "id": 66,
+ "tag": "Single compartment conductance based neuron model"
},
{
- "id": 24,
- "tag": "NWB"
+ "id": 10,
+ "tag": "neuroConstruct"
}
],
- "timestamp_created": "2025-08-14 11:12:01.339611+00:00",
+ "timestamp_created": "2026-07-29 10:18:38+00:00",
"timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/001340/draft",
+ "uri": "https://github.com/OpenSourceBrain/GranuleCell",
"user": {
- "email": "info@opensourcebrain.org",
+ "email": "osbadmin@opensourcebrain.org",
"first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
+ "id": "897f31bd-b8a4-49bb-97e1-309a12ee6dac",
"last_name": "Admin",
"username": "osbadmin"
},
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
+ "user_id": "897f31bd-b8a4-49bb-97e1-309a12ee6dac"
},
- "3589": {
+ "50": {
"auto_sync": true,
- "content_types": "experimental",
+ "content_types": "modeling",
"content_types_list": [
- "experimental"
+ "modeling"
],
- "default_context": "draft",
- "id": 3589,
- "name": "Barrel cortex electrophysiology during tactile VR whisker-guided navigation",
- "repository_type": "dandi",
- "summary": "Electrophysiology in the C2 barrel column of wS1 in mice during continuous tactile VR navigation using only the C2 whiskers. Mice are head-fixed on a suspended ball, with two walls placed either side of the mouse. The lateral movement of these walls is coupled in a closed loop real time system to the trajectory of the mouse so that when the mouse moves to the left, the walls move in from the left. This causes them to orient themselves in the middle of the virtual corridor. Mice are presented with turns to the left (contralateral stimulation to recording site) and right (ipsilateral to recording site) in the virtual environment in a completely unrewarded form of a 2AFC task. Trial structure consists of a 100cm closed loop baseline straight running trial, before an open loop 2 second turn to either the left or right. Mouse trajectories (forward and lateral distance and speed) calculated from ball tracking cameras using custom LabVIEW program.",
+ "default_context": "master",
+ "id": 50,
+ "name": "Granule Cell - Steuber, Saviane & Berends",
+ "repository_type": "github",
+ "summary": "\nConversion to NeuroML of a model granule cell developed by Volker Steuber and Chiara Saviane (Silver lab).\n\nBased on a Granule cell model from Michiel Berends, Neural Comp 15, 2531-47 (2005) originally modified by Chiara Saviane and further modified by VS, July 2006.\n",
"tags": [
{
- "id": 181,
- "tag": "DANDI"
+ "id": 46,
+ "tag": "Cerebellum"
},
{
- "id": 5085,
- "tag": "DANDI:001341"
+ "id": 75,
+ "tag": "Granule cell"
},
{
- "id": 194,
- "tag": "Mus musculus - House mouse"
+ "id": 16,
+ "tag": "NEURON"
},
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- "summary": "This dataset contains single cell electrophysiological recordings of mouse hippocampal CA1 neurons in response to activation of programmable antigen-gated G-protein-coupled engineered receptors. Recorded neurons were transfected with an AAV1/2-hSyn-a-mCherry-PAGER-Gi-P2A-mEGFP and responses were then recorded in response to DCZ (100 nM) or DCZ + soluble mCherry (1 uM) application.\n\nThe authors are grateful to the St Jude Children\u2019s Research Hospital Collaborative Research Consortium on GPCRs, the Chan Zuckerberg Biohub\u2013San Francisco, Phil and Penny Knight Initiative for Brain Resilience (KIG-104), Stanford Cancer Institute, Wu Tsai Neurosciences Institute of Stanford University and the NIH (MH135934 to A.Y.T. and I.S., F32CA257159 to N.A.K., NS121106 to I.S.) for funding this work. R.T. was supported by the Life Sciences Research Foundation Fellowship (sponsored by Astellas Pharma) and JSPS Overseas Research Fellowship.",
+ "default_context": "master",
+ "id": 59,
+ "name": "L2/3 Pyramidal Cell Tutorial",
+ "repository_type": "github",
+ "summary": "",
"tags": [
{
- "id": 5106,
- "tag": "Antigen-gated"
+ "id": 3,
+ "tag": "Detailed cell model"
},
{
- "id": 554,
- "tag": "CA1"
+ "id": 88,
+ "tag": "L2/3 pyramidal cell"
},
{
- "id": 5107,
- "tag": "Chemogenetics"
+ "id": 16,
+ "tag": "NEURON"
},
{
- "id": 181,
- "tag": "DANDI"
+ "id": 5,
+ "tag": "Neocortex"
},
{
- "id": 5108,
- "tag": "DANDI:001354"
+ "id": 7,
+ "tag": "OSBv1"
},
{
- "id": 194,
- "tag": "Mus musculus - House mouse"
+ "id": 8,
+ "tag": "Pyramidal cell"
},
{
- "id": 24,
- "tag": "NWB"
+ "id": 9,
+ "tag": "Rodent"
},
{
- "id": 5109,
- "tag": "PAGER"
+ "id": 83,
+ "tag": "Tutorial"
}
],
- "timestamp_created": "2025-08-14 11:12:17.848821+00:00",
+ "timestamp_created": "2026-07-29 10:18:41+00:00",
"timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/001354/draft",
+ "uri": "https://github.com/OpenSourceBrain/L23PyramidalCellTutorial",
"user": {
- "email": "info@opensourcebrain.org",
+ "email": "osbadmin@opensourcebrain.org",
"first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
+ "id": "897f31bd-b8a4-49bb-97e1-309a12ee6dac",
"last_name": "Admin",
"username": "osbadmin"
},
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
+ "user_id": "897f31bd-b8a4-49bb-97e1-309a12ee6dac"
},
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],
- "default_context": "draft",
- "id": 3600,
- "name": "High-Density Recording Reveals Sparse Clusters (But Not Columns) for Shape and Texture Encoding in Macaque V4",
- "repository_type": "dandi",
- "summary": "We used high-density Neuropixels probes in two awake monkeys (one female and one male) to characterize the shape and texture tuning of dozens of neurons simultaneously. The shape set included 15 simple geometric shapes each presented at eight different rotations in 45\u00b0 increments, resulting in a total of 120 shape stimuli. Shapes were filled with a uniform color, either darker or brighter than the background luminance. The texture stimulus set was composed of 40 naturalistic grayscale textures. Each texture image was presented in three versions: original, contrast-reversed, or spectrally-matched noise\n\nMore detailed information associated with this dataset is described in https://doi.org/10.1523/JNEUROSCI.1893-23.2024 ",
+ "default_context": "master",
+ "id": 60,
+ "name": "Layer 5b Pyramidal cell - Hay et al. 2011",
+ "repository_type": "github",
+ "summary": "\r\nLayer 5b Pyramidal cell constrained by experimental data on perisomatic firing properties as well as dendritic activity during backpropagation of the action potential.\r\n\r\n\r\nFrom: **Models of Neocortical Layer 5b Pyramidal Cells Capturing a Wide Range of Dendritic and Perisomatic Active Properties**, Etay Hay, Sean Hill, Felix Sch\u00fcrmann, Henry Markram and Idan Segev, [PLoS Comp Biol 2011](http://www.ploscompbiol.org/article/info%3Adoi%2F10.1371%2Fjournal.pcbi.1002107)\r\n\r\n[](https://travis-ci.org/OpenSourceBrain/L5bPyrCellHayEtAl2011)\r\n",
"tags": [
{
- "id": 181,
- "tag": "DANDI"
+ "id": 3,
+ "tag": "Detailed cell model"
},
{
- "id": 5110,
- "tag": "DANDI:001357"
+ "id": 15,
+ "tag": "L5 pyramidal cell"
},
{
- "id": 210,
- "tag": "Macaca mulatta - Rhesus monkey"
+ "id": 16,
+ "tag": "NEURON"
},
{
- "id": 24,
- "tag": "NWB"
+ "id": 5,
+ "tag": "Neocortex"
+ },
+ {
+ "id": 7,
+ "tag": "OSBv1"
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+ "id": 8,
+ "tag": "Pyramidal cell"
+ },
+ {
+ "id": 9,
+ "tag": "Rodent"
},
{
- "id": 5111,
- "tag": "functional archietecture, monkey, neuropixels, object recognition, shape perception"
+ "id": 10,
+ "tag": "neuroConstruct"
}
],
- "timestamp_created": "2025-08-14 11:12:19.312794+00:00",
+ "timestamp_created": "2026-07-29 10:18:41+00:00",
"timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/001357/draft",
+ "uri": "https://github.com/OpenSourceBrain/L5bPyrCellHayEtAl2011",
"user": {
- "email": "info@opensourcebrain.org",
+ "email": "osbadmin@opensourcebrain.org",
"first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
+ "id": "897f31bd-b8a4-49bb-97e1-309a12ee6dac",
"last_name": "Admin",
"username": "osbadmin"
},
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
+ "user_id": "897f31bd-b8a4-49bb-97e1-309a12ee6dac"
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],
- "default_context": "draft",
- "id": 3601,
- "name": "Neural correlates of crowding in macaque area V4",
- "repository_type": "dandi",
- "summary": "We studied the responses of 147 V4 neurons in two awake, fixating macaque monkeys (66 in Monkey 1, 81 in Monkey 2) to examine how their responses and selectivity to an isolated shape are modified by the presence of surrounding clutter stimuli.\n\nMore detailed information associated with this dataset is described in https://doi.org/10.1523/JNEUROSCI.2260-23.2024 ",
+ "default_context": "master",
+ "id": 61,
+ "name": "Synaptic integration in L5 Pyramidal cell - Larkum et al. 2009",
+ "repository_type": "github",
+ "summary": "\n\nConversion to neuroConstruct/NeuroML of Layer 5 Pyramidal cell model from:\n\nLarkum ME, Nevian T, Sandler M, Polsky A, Schiller J (2009) Synaptic\nintegration in tuft dendrites of layer 5 pyramidal neurons: a new\nunifying principle. Science 325:756-60\n",
"tags": [
{
- "id": 181,
- "tag": "DANDI"
+ "id": 3,
+ "tag": "Detailed cell model"
},
{
- "id": 5112,
- "tag": "DANDI:001358"
+ "id": 15,
+ "tag": "L5 pyramidal cell"
},
{
- "id": 210,
- "tag": "Macaca mulatta - Rhesus monkey"
+ "id": 16,
+ "tag": "NEURON"
},
{
- "id": 24,
- "tag": "NWB"
+ "id": 5,
+ "tag": "Neocortex"
+ },
+ {
+ "id": 7,
+ "tag": "OSBv1"
+ },
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+ "id": 8,
+ "tag": "Pyramidal cell"
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+ "id": 9,
+ "tag": "Rodent"
},
{
- "id": 5113,
- "tag": "object recognition, primate, saliency computation, shape perception, temporal dynamics, ventral visual pathway"
+ "id": 10,
+ "tag": "neuroConstruct"
}
],
- "timestamp_created": "2025-08-14 11:12:20.730664+00:00",
+ "timestamp_created": "2026-07-29 10:18:41+00:00",
"timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/001358/draft",
+ "uri": "https://github.com/OpenSourceBrain/LarkumEtAl2009",
"user": {
- "email": "info@opensourcebrain.org",
+ "email": "osbadmin@opensourcebrain.org",
"first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
+ "id": "897f31bd-b8a4-49bb-97e1-309a12ee6dac",
"last_name": "Admin",
"username": "osbadmin"
},
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
+ "user_id": "897f31bd-b8a4-49bb-97e1-309a12ee6dac"
},
- "3602": {
+ "62": {
"auto_sync": true,
- "content_types": "experimental",
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],
- "default_context": "0.250401.1603",
- "id": 3602,
- "name": "20250331_AIBS_Patchseq_human",
- "repository_type": "dandi",
- "summary": "HMBA Lein PatchSeq upload (human) (Q1 2025)",
+ "default_context": "master",
+ "id": 62,
+ "name": "Locust mushroom body - Ray et al 2020",
+ "repository_type": "github",
+ "summary": "Locust olfactory network with GGN and full KC population in the mushroom body (Ray et al 2020). ",
"tags": [
{
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 5114,
- "tag": "DANDI:001359"
+ "id": 7,
+ "tag": "OSBv1"
},
{
- "id": 262,
- "tag": "Homo sapiens - Human"
+ "id": 12,
+ "tag": "Network"
},
{
- "id": 24,
- "tag": "NWB"
+ "id": 16,
+ "tag": "NEURON"
},
{
- "id": 5115,
- "tag": "Patch-seq, human, multimodal"
+ "id": 89,
+ "tag": "Schistocerca americana"
}
],
- "timestamp_created": "2025-08-14 11:12:22.129975+00:00",
+ "timestamp_created": "2026-07-29 10:18:42+00:00",
"timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/001359/draft",
+ "uri": "https://github.com/OpenSourceBrain/262670",
"user": {
- "email": "info@opensourcebrain.org",
+ "email": "osbadmin@opensourcebrain.org",
"first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
+ "id": "897f31bd-b8a4-49bb-97e1-309a12ee6dac",
"last_name": "Admin",
"username": "osbadmin"
},
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
+ "user_id": "897f31bd-b8a4-49bb-97e1-309a12ee6dac"
},
- "3603": {
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"auto_sync": true,
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],
- "default_context": "draft",
- "id": 3603,
- "name": "CATNIP Analysis of light sheet imaging of whole-brain c-Fos immunostaining in constitutive PACAP-knockout and control PACAP-flox/flox mice",
- "repository_type": "dandi",
- "summary": "This derivative dataset was compiled from data from a study conducted by the National Institute of Mental Health's Intramural Research Program from images acquired from the Systems Neuroscience Imaging Resource and reformatted into BIDS by the NIMH Data Science and Sharing Team. The derivative dataset contains Richardson-Lucy deconvloved and N4 intensity inhomogeneity corrected 3D image stacks and the analysis derivatives of the corrected image stacks from the CATNAP analysis pipeline, https://github.com/snehashis-roy/CATNIP. Data is from the publication \"Constitutive and conditional deletion reveals distinct phenotypes driven by developmental versus neurotransmitter actions of the neuropeptide PACAP,\" https://doi.org/10.1111/jne.13286.",
+ "default_context": "master",
+ "id": 63,
+ "name": "M1 Network Model",
+ "repository_type": "github",
+ "summary": "",
"tags": [
{
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 5118,
- "tag": "DANDI:001362"
- },
- {
- "id": 5119,
- "tag": "Immunostaining"
- },
- {
- "id": 5120,
- "tag": "Mice"
- },
- {
- "id": 79,
- "tag": "Mouse"
- },
- {
- "id": 5121,
- "tag": "PACAP"
+ "id": 5,
+ "tag": "Neocortex"
},
{
- "id": 5122,
- "tag": "c-Fos"
+ "id": 7,
+ "tag": "OSBv1"
},
{
- "id": 5123,
- "tag": "fluorescence"
+ "id": 9,
+ "tag": "Rodent"
},
{
- "id": 5124,
- "tag": "iDISCO"
+ "id": 12,
+ "tag": "Network"
},
{
- "id": 5125,
- "tag": "light sheet"
+ "id": 90,
+ "tag": "Large scale network simulation"
},
{
- "id": 5126,
- "tag": "microscopy"
+ "id": 91,
+ "tag": "NetPyNE"
}
],
- "timestamp_created": "2025-08-14 11:12:24.976234+00:00",
+ "timestamp_created": "2026-07-29 10:18:42+00:00",
"timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/001362/draft",
+ "uri": "https://github.com/OpenSourceBrain/M1NetworkModel",
"user": {
- "email": "info@opensourcebrain.org",
+ "email": "osbadmin@opensourcebrain.org",
"first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
+ "id": "897f31bd-b8a4-49bb-97e1-309a12ee6dac",
"last_name": "Admin",
"username": "osbadmin"
},
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
+ "user_id": "897f31bd-b8a4-49bb-97e1-309a12ee6dac"
},
- "3604": {
+ "64": {
"auto_sync": true,
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],
- "default_context": "draft",
- "id": 3604,
- "name": "Neural Spiking Data in the Rat Somatosensory Cortex Using a Flexible Electrode Responding to Transcranial Focused Ultrasound",
- "repository_type": "dandi",
- "summary": "In this study, we investigate the neuronal response to transcranial focused ultrasound stimulation (tFUS) on the somatosensory cortex using a 128-element array transducer and a chronically implanted ultraflexible nanoelectric thread electrode. This flexible electrode allows us to study higher intensities of tFUS which are impossible with a rigid electrode due to the vibration artifacts that are created. Here we test 5 different levels of in situ ultrasound pressure including 100, 400, 700, 1000, and 1300 kPa. We then tested the effect of varying duty cycle while keeping the pulse repetition frequency (PRF) constant while using the highest peak-peak pressure (1300 kPa), testing duty cycles of 0.6%, 6%, 30%, 60%, and 90% while holding PRF at 1500 Hz. Finally we tested the effect of varying PRF while holding duty cycle constant, testing PRFs of 30, 300, 1500, 3000, and 4500 Hz with a duty cycle of 30%. In each of these, the fundamental frequency of ultrasound was 1500 kHz, and the ultrasound duration was 67 ms, with trials performed every 2 seconds, with a jitter of 10%. Each recording has 505 trials. ",
+ "default_context": "master",
+ "id": 64,
+ "name": "L5 Pyramidal Cell - Mainen et al. 1995",
+ "repository_type": "github",
+ "summary": "\r\n\r\nImplementation of the Mainen et al. pyramidal cell model from: Mainen ZF, Joerges J, Huguenard JR, Sejnowski TJ (1995) A model of spike initiation in neocortical pyramidal neurons. [Neuron 15:1427-39](http://www.ncbi.nlm.nih.gov/pubmed/8845165). This project is based on scripts obtained from: http://senselab.med.yale.edu/senselab/modeldb/ShowModel.asp?model=8210\r\n",
"tags": [
{
- "id": 181,
- "tag": "DANDI"
+ "id": 3,
+ "tag": "Detailed cell model"
},
{
- "id": 5127,
- "tag": "DANDI:001363"
+ "id": 15,
+ "tag": "L5 pyramidal cell"
},
{
- "id": 24,
- "tag": "NWB"
+ "id": 16,
+ "tag": "NEURON"
},
{
- "id": 205,
- "tag": "Rattus norvegicus - Norway rat"
- }
- ],
- "timestamp_created": "2025-08-14 11:12:26.358134+00:00",
- "timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/001363/draft",
- "user": {
- "email": "info@opensourcebrain.org",
- "first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
- "last_name": "Admin",
- "username": "osbadmin"
- },
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "default_context": "draft",
- "id": 3605,
- "name": "Photoacoustic mapping via an optical detection method for PA field characterization",
- "repository_type": "dandi",
- "summary": "Nonradiative photothermal (PT) and photoacoustic (PA) processes have found widespread applications in imaging, stimulation, and therapy. Mapping the generation and propagation of PA and PT waves with resolution is important to elucidate how these fields interact with biological systems. To this end, we introduce spatial offset pump-probe imaging (SOPPI). By spatially offsetting the pump beam and the probe beam, SOPPI can image simultaneously PA and PT wave propagation with nanosecond temporal resolution, micrometer spatial resolution, 65 MHz detection bandwidth, and a sensitivity of 9.9 Pa noise equivalent pressure. We map the PA and PT evolution from a fiber emitter, to understand the generated field. This information can guide us on PA neuromodulation on retina. ",
- "tags": [
+ "id": 5,
+ "tag": "Neocortex"
+ },
+ {
+ "id": 7,
+ "tag": "OSBv1"
+ },
+ {
+ "id": 8,
+ "tag": "Pyramidal cell"
+ },
{
- "id": 181,
- "tag": "DANDI"
+ "id": 9,
+ "tag": "Rodent"
},
{
- "id": 5128,
- "tag": "DANDI:001364"
+ "id": 10,
+ "tag": "neuroConstruct"
}
],
- "timestamp_created": "2025-08-14 11:12:27.760307+00:00",
+ "timestamp_created": "2026-07-29 10:18:42+00:00",
"timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/001364/draft",
+ "uri": "https://github.com/OpenSourceBrain/MainenEtAl_PyramidalCell",
"user": {
- "email": "info@opensourcebrain.org",
+ "email": "osbadmin@opensourcebrain.org",
"first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
+ "id": "897f31bd-b8a4-49bb-97e1-309a12ee6dac",
"last_name": "Admin",
"username": "osbadmin"
},
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
+ "user_id": "897f31bd-b8a4-49bb-97e1-309a12ee6dac"
},
- "3606": {
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"auto_sync": true,
- "content_types": "experimental",
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],
- "default_context": "0.250324.1603",
- "id": 3606,
- "name": "Comparison of Approaches for Surface Vessel Diameter and Pulsatility Quantification",
- "repository_type": "dandi",
- "summary": "movies of a pial vessel of mice used in the experiments.",
+ "default_context": "master",
+ "id": 65,
+ "name": "Large scale laminar cortical network - Mejias et al. 2016",
+ "repository_type": "github",
+ "summary": "",
"tags": [
{
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 5129,
- "tag": "DANDI:001366"
- },
- {
- "id": 194,
- "tag": "Mus musculus - House mouse"
- },
- {
- "id": 24,
- "tag": "NWB"
+ "id": 5,
+ "tag": "Neocortex"
},
{
- "id": 5130,
- "tag": "full width at half maximum"
+ "id": 7,
+ "tag": "OSBv1"
},
{
- "id": 5131,
- "tag": "image analysis"
+ "id": 85,
+ "tag": "MATLAB"
},
{
- "id": 5132,
- "tag": "radon transform"
+ "id": 86,
+ "tag": "Macaque"
},
{
- "id": 5133,
- "tag": "vessel diameter"
+ "id": 92,
+ "tag": "Rate based model"
},
{
- "id": 5134,
- "tag": "vessel pulsation"
+ "id": 93,
+ "tag": "Whole brain"
}
],
- "timestamp_created": "2025-08-14 11:12:29.275579+00:00",
+ "timestamp_created": "2026-07-29 10:18:43+00:00",
"timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/001366/draft",
+ "uri": "https://github.com/OpenSourceBrain/MejiasEtAl2016",
"user": {
- "email": "info@opensourcebrain.org",
+ "email": "osbadmin@opensourcebrain.org",
"first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
+ "id": "897f31bd-b8a4-49bb-97e1-309a12ee6dac",
"last_name": "Admin",
"username": "osbadmin"
},
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
+ "user_id": "897f31bd-b8a4-49bb-97e1-309a12ee6dac"
},
- "3607": {
+ "66": {
"auto_sync": true,
- "content_types": "experimental",
+ "content_types": "modeling",
"content_types_list": [
- "experimental"
+ "modeling"
],
- "default_context": "draft",
- "id": 3607,
- "name": "New information triggers prospective codes to adapt for flexible navigation",
- "repository_type": "dandi",
- "summary": "This dataset includes the electrophysiological and behavioral data from hippocampal CA1 and medial prefrontal cortex in mice performing a virtual reality spatial navigation task. Data are described in Prince et al., 2025, \u201cNew information triggers prospective codes to adapt for flexible navigation\u201d, Nature Communications. Head-fixed mice were trained to perform a memory-based decision-making task in virtual reality (the 'update task'). In this y-maze task, animals were required to navigate between two possible paths using visual cues. On most trials, the first original cue indicated the final reward location and was followed by a delay period during which mice had to maintain the memory of the correct goal arm. However on a subset of trials, a second visual cue appeared when mice reached a specific location after a shortened delay period. During the second cue, the visual patterns appeared on the opposite wall from the original cue indicating that the reward location switched from the initial arm, and animals must switch from their initial decision maintained in memory to the opposite choice. After several phases of behavioral training, electrophysiological data was recorded from hippocampal CA1 and medial prefrontal cortex (mPFC) during the task.",
+ "default_context": "master",
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],
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+ "tag": "NEURON"
},
{
- "id": 5155,
- "tag": "operant conditioning task"
+ "id": 12,
+ "tag": "Network"
},
{
- "id": 5156,
- "tag": "pupil tracking"
+ "id": 109,
+ "tag": "Network oscillations"
},
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- "tag": "sensory mapping"
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+ "tag": "OSBv1"
},
{
- "id": 5158,
- "tag": "transcranial optical imaging"
+ "id": 8,
+ "tag": "Pyramidal cell"
},
{
- "id": 5159,
- "tag": "wide-field calcium imaging"
+ "id": 9,
+ "tag": "Rodent"
}
],
- "timestamp_created": "2025-08-14 11:12:44.245991+00:00",
+ "timestamp_created": "2026-07-29 10:18:46+00:00",
"timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/001425/draft",
+ "uri": "https://github.com/mbezaire/ca1",
"user": {
- "email": "info@opensourcebrain.org",
+ "email": "osbadmin@opensourcebrain.org",
"first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
+ "id": "897f31bd-b8a4-49bb-97e1-309a12ee6dac",
"last_name": "Admin",
"username": "osbadmin"
},
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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- "name": "Hippocampal Neural Dynamics and Postoperative Delirium-Like Behavior in Aged Mice",
- "repository_type": "dandi",
- "summary": "Using a model of POD in older mice, we investigated the effects of anesthesia/surgery on electrophysiological signals and assessed neural dynamics through in vivo calcium imaging. Additionally, we treated older mice with indole 3-propionic acid (IPA) and evaluated its impact on POD-like behavior, as well as on neural activity using electrophysiology and calcium imaging.",
+ "default_context": "master",
+ "id": 76,
+ "name": "Nengo - NeuroML interoperability",
+ "repository_type": "github",
+ "summary": "\n\nProject to test scenarios for NeuroML & [Nengo](http://nengo.ca) interoperability\n",
"tags": [
{
- "id": 181,
- "tag": "DANDI"
+ "id": 25,
+ "tag": "Generic"
},
{
- "id": 5160,
- "tag": "DANDI:001428"
+ "id": 90,
+ "tag": "Large scale network simulation"
},
{
- "id": 194,
- "tag": "Mus musculus - House mouse"
+ "id": 110,
+ "tag": "Nengo"
},
{
- "id": 24,
- "tag": "NWB"
+ "id": 6,
+ "tag": "Network model"
+ },
+ {
+ "id": 7,
+ "tag": "OSBv1"
+ },
+ {
+ "id": 53,
+ "tag": "Python tools for computational neuroscience"
},
{
- "id": 5161,
- "tag": "POD Electrophysiology Aging"
+ "id": 73,
+ "tag": "Simulator showcase"
}
],
- "timestamp_created": "2025-08-14 11:12:45.656670+00:00",
+ "timestamp_created": "2026-07-29 10:18:46+00:00",
"timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/001428/draft",
+ "uri": "https://github.com/OpenSourceBrain/NengoNeuroML",
"user": {
- "email": "info@opensourcebrain.org",
+ "email": "osbadmin@opensourcebrain.org",
"first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
+ "id": "897f31bd-b8a4-49bb-97e1-309a12ee6dac",
"last_name": "Admin",
"username": "osbadmin"
},
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
+ "user_id": "897f31bd-b8a4-49bb-97e1-309a12ee6dac"
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- "default_context": "draft",
- "id": 3618,
- "name": "Aging-associated decrease of PGC-1\u03b1 promotes pain chronification",
- "repository_type": "dandi",
- "summary": "aging-associated decrease of PGC-1\u03b1 promotes pain chronification, which might be harnessed to alleviate the burden of chronic pain in older individuals.",
+ "default_context": "master",
+ "id": 77,
+ "name": "NEST Showcase",
+ "repository_type": "github",
+ "summary": "",
"tags": [
{
- "id": 181,
- "tag": "DANDI"
+ "id": 5,
+ "tag": "Neocortex"
+ },
+ {
+ "id": 7,
+ "tag": "OSBv1"
},
{
- "id": 5162,
- "tag": "DANDI:001430"
+ "id": 12,
+ "tag": "Network"
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- "id": 194,
- "tag": "Mus musculus - House mouse"
+ "id": 25,
+ "tag": "Generic"
},
{
- "id": 24,
- "tag": "NWB"
+ "id": 27,
+ "tag": "NEST"
}
],
- "timestamp_created": "2025-08-14 11:20:06.121184+00:00",
+ "timestamp_created": "2026-07-29 10:18:47+00:00",
"timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/001430/draft",
+ "uri": "https://github.com/OpenSourceBrain/NESTShowcase",
"user": {
- "email": "info@opensourcebrain.org",
+ "email": "osbadmin@opensourcebrain.org",
"first_name": "OSB",
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"last_name": "Admin",
"username": "osbadmin"
},
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
+ "user_id": "897f31bd-b8a4-49bb-97e1-309a12ee6dac"
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- "default_context": "draft",
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- "name": "A dataset of stimulus evoked spiking timestamps from same neurons across multiple days recorded with advanced electrodes",
- "repository_type": "dandi",
- "summary": "Publication: \"Temporal coding carries more stable cortical visual representations than firing rate over time\".The dataset contains spike timestamps (bin number) relative to stimulus onset. 4 types of visual stimuli were displayed with 30+ trials each day for 15 days. Access variables in the _tsXX.nwb for XX stimuli (dg/sg/rfg/ni) with command nwb.units.getRow(XXX) where XXX is the trial number, and the result is timestamps of firings in that trial (multiply 0.5 to get unit in ms). To understand which neuron, which day, which condition, Nth trial of that condition, get information matrix from nwb.acquisition.get('myMatrix') and refer to its first 4 rows, respectively. The condition order is DG: 0:22.5:337.5 degree; SG: [0:30:150 degree, 0.02cpd],[0:30:150 degree 0.04cpd] etc; RFG: [horizontal locations left to right , vertical location top row],[horizontal locations left to right, vertical location second row from top] etc. NI: 100 images not in a particular order. Access variables in the _tuning.nwb with command nwb.acquisition.get('attendance') the variables are the following 1.'attendance' explains for each 1204 neuron and 15 days, whether that neuron was detected/tracked. 2.'highAttendanceUnit' further shortlists 1037 neurons out of the 1204 that appeared for more than 2 days. 3.'notInleast15percentPoorlyTuned' further shortlist ~830 neurons out of the 1037 high attendance units that are not among the worst 15% in their tuning to natural image stimuli across days. 4-7.'tuned_XX' explains for XX stimuli (DG/SG/RFG/NI) whether the firing rate-based tuning to stimuli was significant for a given high attendance neuron in any given day. 8.'whichAnimalPerUnit' to get the animal from which the unit was recorded from ",
+ "default_context": "master",
+ "id": 78,
+ "name": "NetPyNE Showcase",
+ "repository_type": "github",
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"tags": [
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- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 5163,
- "tag": "DANDI:001431"
- },
- {
- "id": 194,
- "tag": "Mus musculus - House mouse"
+ "id": 7,
+ "tag": "OSBv1"
},
{
- "id": 24,
- "tag": "NWB"
+ "id": 52,
+ "tag": "Python"
}
],
- "timestamp_created": "2025-08-14 11:20:07.570442+00:00",
+ "timestamp_created": "2026-07-29 10:18:47+00:00",
"timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/001431/draft",
+ "uri": "https://github.com/OpenSourceBrain/NetPyNEShowcase",
"user": {
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+ "email": "osbadmin@opensourcebrain.org",
"first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
+ "id": "897f31bd-b8a4-49bb-97e1-309a12ee6dac",
"last_name": "Admin",
"username": "osbadmin"
},
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
+ "user_id": "897f31bd-b8a4-49bb-97e1-309a12ee6dac"
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- "default_context": "draft",
- "id": 3620,
- "name": "Freely moving mouse 3d tracking and neural data",
- "repository_type": "dandi",
- "summary": "These data were collected under NIH/NINDS/BRAIN 1 R34 NS137017.",
+ "default_context": "master",
+ "id": 79,
+ "name": "neuroConstruct Showcase",
+ "repository_type": "github",
+ "summary": "\n\nExample projects illustrating the functionality of [neuroConstruct](http://www.neuroconstruct.org/)\n",
"tags": [
{
- "id": 181,
- "tag": "DANDI"
+ "id": 7,
+ "tag": "OSBv1"
+ },
+ {
+ "id": 10,
+ "tag": "neuroConstruct"
},
{
- "id": 5164,
- "tag": "DANDI:001432"
+ "id": 111,
+ "tag": "neuroconstruct"
}
],
- "timestamp_created": "2025-08-14 11:20:09.294644+00:00",
+ "timestamp_created": "2026-07-29 10:18:47+00:00",
"timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/001432/draft",
+ "uri": "https://github.com/OpenSourceBrain/neuroConstructShowcase",
"user": {
- "email": "info@opensourcebrain.org",
+ "email": "osbadmin@opensourcebrain.org",
"first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
+ "id": "897f31bd-b8a4-49bb-97e1-309a12ee6dac",
"last_name": "Admin",
"username": "osbadmin"
},
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- "id": 3621,
- "name": "Breathing rhythm and place dataset",
- "repository_type": "dandi",
- "summary": "These are behavioral and electrophysiological data from recordings of sniffing, video, and OB electrophysiology in freely-behaving mice given no stimulus, reward, or task. 1 1 R01 NS 123903",
+ "default_context": "master",
+ "id": 80,
+ "name": "NeuroElectro & SciUnit Showcase",
+ "repository_type": "github",
+ "summary": "\r\n\r\nA project highlighting some of the possible interactions between OSB and [NeuroElectro](http://neuroelectro.org/) and [SciUnit](https://github.com/rgerkin/sciunit).\r\n\r\nNeuroElectro is one of the key external resources OSB will interact with, see [Interactions with other Neuroinformatics resources](http://www.opensourcebrain.org/projects/neuroinformatics/wiki/Wiki)\r\n",
"tags": [
{
- "id": 181,
- "tag": "DANDI"
+ "id": 7,
+ "tag": "OSBv1"
+ },
+ {
+ "id": 25,
+ "tag": "Generic"
},
{
- "id": 5165,
- "tag": "DANDI:001433"
+ "id": 53,
+ "tag": "Python tools for computational neuroscience"
},
{
- "id": 194,
- "tag": "Mus musculus - House mouse"
+ "id": 97,
+ "tag": "Database"
},
{
- "id": 24,
- "tag": "NWB"
+ "id": 99,
+ "tag": "Neuroinformatics"
}
],
- "timestamp_created": "2025-08-14 11:20:11.172639+00:00",
+ "timestamp_created": "2026-07-29 10:18:47+00:00",
"timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/001433/draft",
+ "uri": "https://github.com/OpenSourceBrain/NeuroElectroSciUnit",
"user": {
- "email": "info@opensourcebrain.org",
+ "email": "osbadmin@opensourcebrain.org",
"first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
+ "id": "897f31bd-b8a4-49bb-97e1-309a12ee6dac",
"last_name": "Admin",
"username": "osbadmin"
},
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
+ "user_id": "897f31bd-b8a4-49bb-97e1-309a12ee6dac"
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- "default_context": "0.250512.1625",
- "id": 3622,
- "name": "TEM Images of Corpus Callosum in Control and Cuprizone-Intoxicated Mice with Axon and Myelin Segmentations",
- "repository_type": "dandi",
- "summary": "- TEM dataset for AxonDeepSeg (https://axondeepseg.readthedocs.io/)\n\n- 158 brain (splenium) samples from 20 mice with axon and myelin manual segmentation labels.\n\n- Every individual axon is separated from neighboring fibers with a 2 pixel delineation, such that this semantic segmentation dataset also doubles as an instance segmentation dataset.\n\n- In our original paper (Zaimi et al. 2018), the FOV was reported to be 6x9 um^2. This is because 1) these original values were reported in the original data reference (below), and 2) our images here are slightly cropped at the bottom relative to the original data in order to remove the scale bar.\n\n- Our original paper (Zaimi et al. 2018) reported the resolution as being 0.002 micrometer, which was (for an unknown reason) rounded in the paper from the true value of 0.00236 micrometer, as reported in the original data reference (below).\n\n- Reference for the origin of the data: Jelescu, I. O. et al. In vivo quantification of demyelination and recovery using compartment-specific diffusion MRI metrics validated by electron microscopy. Neuroimage 132, 104\u2013114 (2016). See https://doi.org/10.1016/j.neuroimage.2016.02.004 (Center for Biomedical Imaging, Department of Radiology, New York University School of Medicine, New York, NY, USA)\n\n- The original aim of the 2016 study was to quantify demyelination in mice intoxicated with cuprizone in both accute (6 weeks) and chronic (12 weeks) scenarios. As such, this dataset includes samples from both healthy and intoxicated mouse groups.",
+ "default_context": "master",
+ "id": 81,
+ "name": "NeuroML2 Showcase ",
+ "repository_type": "github",
+ "summary": "The standard examples for NeuroML 2 from the repository for the specification.",
"tags": [
{
- "id": 181,
- "tag": "DANDI"
+ "id": 7,
+ "tag": "OSBv1"
+ },
+ {
+ "id": 112,
+ "tag": "--"
+ },
+ {
+ "id": 113,
+ "tag": "---"
},
{
- "id": 5166,
- "tag": "DANDI:001436"
+ "id": 114,
+ "tag": "NeuroML 2"
}
],
- "timestamp_created": "2025-08-14 11:20:12.757544+00:00",
+ "timestamp_created": "2026-07-29 10:18:48+00:00",
"timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/001436/draft",
+ "uri": "https://github.com/NeuroML/NeuroML2",
"user": {
- "email": "info@opensourcebrain.org",
+ "email": "osbadmin@opensourcebrain.org",
"first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
+ "id": "897f31bd-b8a4-49bb-97e1-309a12ee6dac",
"last_name": "Admin",
"username": "osbadmin"
},
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
+ "user_id": "897f31bd-b8a4-49bb-97e1-309a12ee6dac"
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],
- "default_context": "0.250509.1913",
- "id": 3623,
- "name": "Bright-Field Images of Rat Nerves at Different Regeneration Stages with Axon and Myelin Segmentations",
- "repository_type": "dandi",
- "summary": "- Bright-Field Optical Microscopy (BF) dataset for AxonDeepSeg (https://axondeepseg.readthedocs.io/)\n\n- Rat peripheral nerves across different axonal regeneration stages.\n\n- Data collected from adult rats in experimental nerve repair studies.\n\n- 8 samples cropped to ROI used as training data.\n - sub-uoftRat02\n - sub-uoftRat04\n - sub-uoftRat07\n - sub-uoftRat08\n - sub-uoftRat09\n - sub-uoftRat10\n - sub-uoftRat16\n - sub-uoftRat17\n\n- Corresponding axon, myelin, axonmyelin manual segmentation \"labels\" in derivatives.\n\n- This dataset is a subset of the full dataset used in this publication:\n\n - https://www.nature.com/articles/s41598-022-10066-6\n\n - training set for the AxonDeepSeg model developed and validated in the article\n",
+ "default_context": "master",
+ "id": 82,
+ "name": "NeuroMLlite Showcase",
+ "repository_type": "github",
+ "summary": "Work in progress...",
"tags": [
{
- "id": 181,
- "tag": "DANDI"
+ "id": 5,
+ "tag": "Neocortex"
+ },
+ {
+ "id": 7,
+ "tag": "OSBv1"
+ },
+ {
+ "id": 12,
+ "tag": "Network"
+ },
+ {
+ "id": 25,
+ "tag": "Generic"
},
{
- "id": 5167,
- "tag": "DANDI:001440"
+ "id": 29,
+ "tag": "NeuroML2"
}
],
- "timestamp_created": "2025-08-14 11:20:14.237314+00:00",
+ "timestamp_created": "2026-07-29 10:18:48+00:00",
"timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/001440/draft",
+ "uri": "https://github.com/NeuroML/NeuroMLlite",
"user": {
- "email": "info@opensourcebrain.org",
+ "email": "osbadmin@opensourcebrain.org",
"first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
+ "id": "897f31bd-b8a4-49bb-97e1-309a12ee6dac",
"last_name": "Admin",
"username": "osbadmin"
},
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
+ "user_id": "897f31bd-b8a4-49bb-97e1-309a12ee6dac"
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- "default_context": "0.250512.1626",
- "id": 3624,
- "name": "SEM Images of Rat Spinal Cord with Axon and Myelin Segmentations",
- "repository_type": "dandi",
- "summary": "SEM dataset for AxonDeepSeg (https://axondeepseg.readthedocs.io/)\n\n- 10 rat spinal cord samples (cervical level) with axon and myelin manual segmentation labels. \n\n- Isotropic pixel size resolution ranging from 0.05 to 0.18 um\n\n- Every touching fiber is separated by a 1 pixel delineation in the masks.\n\n- This dataset comprises acquisitions conducted by various researchers between 2015 and 2017. The images represent small cropped sections extracted from larger mosaic images.\n\nExample dataset containing scanning electron microscopy (SEM) data to illustrate BIDS convention.\n",
+ "default_context": "main",
+ "id": 83,
+ "name": "NeuroMLSBMLShowcase",
+ "repository_type": "github",
+ "summary": "",
"tags": [
{
- "id": 181,
- "tag": "DANDI"
+ "id": 7,
+ "tag": "OSBv1"
},
{
- "id": 5168,
- "tag": "DANDI:001442"
+ "id": 115,
+ "tag": "SBML"
}
],
- "timestamp_created": "2025-08-14 11:20:15.756948+00:00",
+ "timestamp_created": "2026-07-29 10:18:48+00:00",
"timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/001442/draft",
+ "uri": "https://github.com/OpenSourceBrain/NeuroMLSBMLShowcase",
"user": {
- "email": "info@opensourcebrain.org",
+ "email": "osbadmin@opensourcebrain.org",
"first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
+ "id": "897f31bd-b8a4-49bb-97e1-309a12ee6dac",
"last_name": "Admin",
"username": "osbadmin"
},
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
+ "user_id": "897f31bd-b8a4-49bb-97e1-309a12ee6dac"
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],
- "default_context": "0.250805.2002",
- "id": 3625,
- "name": "Simulated mouse primary motor cortex activity during control and decreased pyramidal tract neuron excitability in the parkinsonian condition",
- "repository_type": "dandi",
- "summary": "Each simulation produced 4 files and we collected 4 sets of simulations for a total of 16 files. Each simulation included a control and parkinsonian condition in the rest (quiet wakefulness) and in the activated (movement) state. Parkinsonian M1 simulations were different from controls in that their PT5B neurons had reduced excitability as found in cortical slices of 6-OHDA treated mice.Each MWB file includes a local field potential trace, spike train data from all 10,073 neurons, and membrane potential traces from 400 of the layer 5B pyramidal tract (PT5B) neurons. Simulations were 4.3 seconds in duration. Full information available in our paper https://doi.org/10.1101/2024.05.23.595566",
+ "default_context": "master",
+ "id": 84,
+ "name": "NeuroMorpho.Org Showcase",
+ "repository_type": "github",
+ "summary": "",
"tags": [
{
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 5169,
- "tag": "DANDI:001444"
+ "id": 7,
+ "tag": "OSBv1"
},
{
- "id": 194,
- "tag": "Mus musculus - House mouse"
+ "id": 24,
+ "tag": "Neuronal reconstruction"
},
{
- "id": 24,
- "tag": "NWB"
+ "id": 43,
+ "tag": "Multiple"
},
{
- "id": 4590,
- "tag": "Parkinson's disease"
+ "id": 97,
+ "tag": "Database"
},
{
- "id": 29,
- "tag": "mouse"
+ "id": 99,
+ "tag": "Neuroinformatics"
},
{
- "id": 4836,
- "tag": "primary motor cortex"
+ "id": 103,
+ "tag": "SWC"
}
],
- "timestamp_created": "2025-08-14 11:20:17.164898+00:00",
+ "timestamp_created": "2026-07-29 10:18:49+00:00",
"timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/001444/draft",
+ "uri": "https://github.com/OpenSourceBrain/NeuroMorpho",
"user": {
- "email": "info@opensourcebrain.org",
+ "email": "osbadmin@opensourcebrain.org",
"first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
+ "id": "897f31bd-b8a4-49bb-97e1-309a12ee6dac",
"last_name": "Admin",
"username": "osbadmin"
},
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
+ "user_id": "897f31bd-b8a4-49bb-97e1-309a12ee6dac"
},
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"auto_sync": true,
- "content_types": "experimental",
+ "content_types": "modeling",
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+ "modeling"
],
- "default_context": "draft",
- "id": 3626,
- "name": "In Vivo Electrochemical Impedance Spectroscopy - G3",
- "repository_type": "dandi",
- "summary": "Representative EIS data of G3 electrodes implanted in 4 rats, for the first 5 weeks. The map between electrode number and electrode diameter size (in um) is as follows:\n1: 5, 2: 1, 3: 20, 4: 5, 5: 1, 6: 5, 7: 20, 8: 5, 9: 1, 10: 100,\n11: 1, 12: 15, 13: 10, 14: 15, 15: 15, 16: 1, 17: 1, 18: 1, 19: 5, 20: 1,\n21: 5, 22: 20, 23: 20, 24: 100, 25: 10, 26: 10, 27: 15, 28: 10, 29: 1, 30: 1, \n31: 1, 32: 10",
+ "default_context": "master",
+ "id": 85,
+ "name": "Action Selection in the Basal Ganglia - Guthrie et al, 2013",
+ "repository_type": "github",
+ "summary": "Reproduction of a model of action selection in the basal ganglia (Guthrie et al., 2013)",
"tags": [
{
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 5170,
- "tag": "DANDI:001445"
- },
- {
- "id": 5171,
- "tag": "G3"
+ "id": 6,
+ "tag": "Network model"
},
{
- "id": 5172,
- "tag": "In Vivo Impedance"
+ "id": 7,
+ "tag": "OSBv1"
},
{
- "id": 24,
- "tag": "NWB"
+ "id": 25,
+ "tag": "Generic"
},
{
- "id": 4867,
- "tag": "Unidentified"
+ "id": 52,
+ "tag": "Python"
},
{
- "id": 5082,
- "tag": "microelectrode array"
+ "id": 116,
+ "tag": "Basal ganglia"
}
],
- "timestamp_created": "2025-08-14 11:20:18.584004+00:00",
+ "timestamp_created": "2026-07-29 10:18:49+00:00",
"timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/001445/draft",
+ "uri": "https://github.com/rougier/Neurosciences/tree/master/basal-ganglia/guthrie-et-al-2013",
"user": {
- "email": "info@opensourcebrain.org",
+ "email": "osbadmin@opensourcebrain.org",
"first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
+ "id": "897f31bd-b8a4-49bb-97e1-309a12ee6dac",
"last_name": "Admin",
"username": "osbadmin"
},
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
+ "user_id": "897f31bd-b8a4-49bb-97e1-309a12ee6dac"
},
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"auto_sync": true,
- "content_types": "experimental",
+ "content_types": "modeling",
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],
- "default_context": "0.250520.0017",
- "id": 3627,
- "name": "Electrophysiological validation of striatal neurons and dopamine neurons in D1-Cre, A2a-Cre, D1-FlpO, A2a-FlpO, DAT-FlpO transgenic mice",
- "repository_type": "dandi",
- "summary": "Electrophysiology dataset from whole-cell recordings from murine striatal spiny projection neurons and midbrain dopaminergic neurons from acute slices prepared from newly generated knock-in transgenic mouse lines: - D1-Cre- A2a-Cre- D1-FlpO- A2a-FlpO- DAT-FlpO. This data was generated by the Costa/Peterka labs and is a part of (Albarran et al.)",
+ "default_context": "master",
+ "id": 86,
+ "name": "NIF and NeuroLex Showcase",
+ "repository_type": "github",
+ "summary": "\n\nA repository for information, scripts and configuration files which demonstrate the interactions possible between [NIF](https://www.neuinfo.org), [NeuroLex](http://neurolex.org/wiki/Main_Page) and OSB.\n\nSee the [[Wiki]] for more details.\n",
"tags": [
{
- "id": 227,
- "tag": "BIDS"
+ "id": 7,
+ "tag": "OSBv1"
+ },
+ {
+ "id": 50,
+ "tag": "Model annotation"
+ },
+ {
+ "id": 51,
+ "tag": "Ontology"
},
{
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- "tag": "DANDI"
+ "id": 97,
+ "tag": "Database"
},
{
- "id": 5173,
- "tag": "DANDI:001452"
+ "id": 98,
+ "tag": "Model sharing"
},
{
- "id": 194,
- "tag": "Mus musculus - House mouse"
+ "id": 99,
+ "tag": "Neuroinformatics"
}
],
- "timestamp_created": "2025-08-14 11:20:19.994625+00:00",
+ "timestamp_created": "2026-07-29 10:18:49+00:00",
"timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/001452/draft",
+ "uri": "https://github.com/OpenSourceBrain/NIFShowcase",
"user": {
- "email": "info@opensourcebrain.org",
+ "email": "osbadmin@opensourcebrain.org",
"first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
+ "id": "897f31bd-b8a4-49bb-97e1-309a12ee6dac",
"last_name": "Admin",
"username": "osbadmin"
},
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
+ "user_id": "897f31bd-b8a4-49bb-97e1-309a12ee6dac"
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"auto_sync": true,
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],
- "default_context": "0.250518.1950",
- "id": 3628,
- "name": "Neural circuits underlying divergent visuomotor strategies of zebrafish and Danionella cerebrum",
- "repository_type": "dandi",
- "summary": "This dataset was used in \"Neural circuits underlying divergent visuomotor strategies of zebrafish and Danionella cerebrum\" (Current Biology, 2025, https://doi.org/10.1016/j.cub.2025.04.027).\n\nMany animals respond to sensory cues with species-specific coordinated movements.1,2 A universal visually guided behavior is the optomotor response (OMR),3,4,5,6 which stabilizes the body by following optic flow induced by displacements in currents.7 While the brain-wide OMR circuits in zebrafish (Danio rerio) have been characterized,8,9,10,11,12 the homologous neural functions across teleost species with different ecological niches, such as Danionella cerebrum,13,14,15 remain largely unexplored. Here, we directly compare larval zebrafish and D. cerebrum to uncover the neural mechanisms underlying the natural variation of visuomotor coordination. Closed-loop behavioral tracking during visual stimulation revealed that D. cerebrum follow optic flow by swimming continuously, punctuated with sharp directional turns, in contrast to the burst-and-glide locomotion of zebrafish.16 Although D. cerebrum swim at higher average speeds, they lack the direction-dependent velocity modulation observed in zebrafish. Two-photon calcium imaging and tail tracking showed that both species exhibit direction-selective encoding in putative homologous regions, with D. cerebrum containing more monocular neurons. D. cerebrum sustain significantly longer directed swims across all stimuli than zebrafish, with zebrafish reducing tail movement duration in response to oblique, turn-inducing stimuli. While locomotion-associated neurons in D. cerebrum display more prolonged activity than zebrafish, lateralized turn-associated neural activity in the hindbrain suggests a shared neural circuit architecture that independently controls movement vigor and direction. These findings highlight the diversity in visuomotor strategies among teleost species with shared circuit motifs, establishing a framework for unraveling the neural mechanisms driving continuous and discrete locomotion.",
+ "default_context": "master",
+ "id": 87,
+ "name": "NineML Showcase",
+ "repository_type": "github",
+ "summary": "\n\nExamples of models in [NineML](http://software.incf.org/software/nineml) (and the related language [SpineML](http://bimpa.group.shef.ac.uk/SpineML/index.php/Home)) and conversion to/from NeuroML/LEMS.\n\nSee the [[Wiki]] for more details.\n",
"tags": [
{
- "id": 181,
- "tag": "DANDI"
+ "id": 7,
+ "tag": "OSBv1"
},
{
- "id": 5174,
- "tag": "DANDI:001453"
+ "id": 98,
+ "tag": "Model sharing"
},
{
- "id": 305,
- "tag": "Danio rerio - Zebra fish"
+ "id": 117,
+ "tag": "NineML"
},
{
- "id": 24,
- "tag": "NWB"
+ "id": 118,
+ "tag": "SpineML"
+ },
+ {
+ "id": 119,
+ "tag": "Standardization"
+ },
+ {
+ "id": 120,
+ "tag": "XML"
}
],
- "timestamp_created": "2025-08-14 11:20:21.391647+00:00",
+ "timestamp_created": "2026-07-29 10:18:50+00:00",
"timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/001453/draft",
+ "uri": "https://github.com/OpenSourceBrain/NineMLShowcase",
"user": {
- "email": "info@opensourcebrain.org",
+ "email": "osbadmin@opensourcebrain.org",
"first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
+ "id": "897f31bd-b8a4-49bb-97e1-309a12ee6dac",
"last_name": "Admin",
"username": "osbadmin"
},
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
+ "user_id": "897f31bd-b8a4-49bb-97e1-309a12ee6dac"
},
- "3629": {
+ "88": {
"auto_sync": true,
- "content_types": "experimental",
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],
- "default_context": "draft",
- "id": 3629,
- "name": "Social isolation recruits amygdala-cortical circuitry to escalate alcohol drinking Part 1: in vivo calcium and behavior data",
- "repository_type": "dandi",
- "summary": "This dandiset contains the in vivo data used in the manuscript: Patel RR, Patarino M, Kim K, Pamintuan R, Taschbach FH, Li H, Lee CR, van Hoek A, Castro R, Cazares C, Miranda RL, Jia C, Delahanty J, Batra K, Keyes LR, Libster A, Wichmann R, Pereira TD, Benna MK, Tye KM. \"Social isolation recruits amygdala-cortical circuitry to escalate alcohol drinking.\" bioRxiv: 2023 Nov 10 doi: https://doi.org/10.1101/2023.11.09.566421. It includes in vivo calcium imaging of the basolateral amygdala-medial prefrontal cortex circuit in mice during two different behavioral paradigms. The dandiset includes calcium recordings, behavioral videos with pose tracking, and histological images.",
+ "default_context": "master",
+ "id": 88,
+ "name": "DG Basket Cell - Norenberg et al. 2010",
+ "repository_type": "github",
+ "summary": "",
"tags": [
{
- "id": 5175,
- "tag": "Alcohol Use Disorder (AUD) Susceptibility"
- },
- {
- "id": 5176,
- "tag": "BLA-mPFC Circuit"
- },
- {
- "id": 5177,
- "tag": "Basolateral Amygdala (BLA)"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 5178,
- "tag": "DANDI:001454"
- },
- {
- "id": 5179,
- "tag": "Medial Prefrontal Cortex (mPFC)"
+ "id": 121,
+ "tag": "Basket cell"
},
{
- "id": 194,
- "tag": "Mus musculus - House mouse"
+ "id": 54,
+ "tag": "Dentate gyrus"
},
{
- "id": 24,
- "tag": "NWB"
+ "id": 3,
+ "tag": "Detailed cell model"
},
{
- "id": 5180,
- "tag": "alcohol drinking"
+ "id": 31,
+ "tag": "Hippocampal formation"
},
{
- "id": 525,
- "tag": "calcium imaging"
+ "id": 33,
+ "tag": "Interneuron"
},
{
- "id": 4997,
- "tag": "mouse model"
+ "id": 16,
+ "tag": "NEURON"
},
{
- "id": 17,
- "tag": "optogenetics"
+ "id": 7,
+ "tag": "OSBv1"
},
{
- "id": 5181,
- "tag": "social isolation"
+ "id": 122,
+ "tag": "Passive model"
},
{
- "id": 5182,
- "tag": "social rank"
+ "id": 9,
+ "tag": "Rodent"
}
],
- "timestamp_created": "2025-08-14 11:20:22.816607+00:00",
+ "timestamp_created": "2026-07-29 10:18:50+00:00",
"timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/001454/draft",
+ "uri": "https://github.com/OpenSourceBrain/NorenbergEtAl2010_DGBasketCell",
"user": {
- "email": "info@opensourcebrain.org",
+ "email": "osbadmin@opensourcebrain.org",
"first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
+ "id": "897f31bd-b8a4-49bb-97e1-309a12ee6dac",
"last_name": "Admin",
"username": "osbadmin"
},
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
+ "user_id": "897f31bd-b8a4-49bb-97e1-309a12ee6dac"
},
- "3630": {
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"auto_sync": true,
- "content_types": "experimental",
+ "content_types": "modeling",
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- "experimental"
+ "modeling"
],
- "default_context": "0.250625.2239",
- "id": 3630,
- "name": "20250630_AIBS_Patchseq_Mouse",
- "repository_type": "dandi",
- "summary": "A whole cell patch clamp dataset from Allen Institute measuring intrinsic properties of excitatory projection neurons in slices of mouse visual cortex",
+ "default_context": "master",
+ "id": 89,
+ "name": "NWB Showcase",
+ "repository_type": "github",
+ "summary": "Showcasing the interaction with [Neurodata Without Borders (NWB)](https://www.nwb.org) format experimental data on OSB.",
"tags": [
{
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 5183,
- "tag": "DANDI:001455"
- },
- {
- "id": 194,
- "tag": "Mus musculus - House mouse"
+ "id": 7,
+ "tag": "OSBv1"
},
{
- "id": 24,
+ "id": 123,
"tag": "NWB"
}
],
- "timestamp_created": "2025-08-14 11:20:24.284660+00:00",
+ "timestamp_created": "2026-07-29 10:18:50+00:00",
"timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/001455/draft",
+ "uri": "https://github.com/OpenSourceBrain/NWBShowcase",
"user": {
- "email": "info@opensourcebrain.org",
+ "email": "osbadmin@opensourcebrain.org",
"first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
+ "id": "897f31bd-b8a4-49bb-97e1-309a12ee6dac",
"last_name": "Admin",
"username": "osbadmin"
},
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
+ "user_id": "897f31bd-b8a4-49bb-97e1-309a12ee6dac"
},
- "3631": {
+ "90": {
"auto_sync": true,
- "content_types": "experimental",
+ "content_types": "modeling",
"content_types_list": [
- "experimental"
+ "modeling"
],
- "default_context": "0.250703.1826",
- "id": 3631,
- "name": "Craniocerebral skull and vasculature stitched datasets",
- "repository_type": "dandi",
- "summary": "Stitched data of skull and vasculature at isotropic (1.0 \u00b5m x 1.0 \u00b5m x 1.0 \u00b5m) resolution from \"Spatiotemporal focusing enables all-optical in situ histology of heterogeneous tissue\".",
+ "default_context": "master",
+ "id": 90,
+ "name": "Olfactory Bulb",
+ "repository_type": "github",
+ "summary": "A detailed network model of part of the rat olfactory bulb comprising compartmental mitral, granule and PG cells developed by Aditya Gilra and Upinder S. Bhalla (manuscript in preparation, 16 Apr 2013). The cell morphologies and network connections are in NeuroML v1.8.\n",
"tags": [
{
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 5184,
- "tag": "DANDI:001460"
- },
- {
- "id": 194,
- "tag": "Mus musculus - House mouse"
+ "id": 6,
+ "tag": "Network model"
},
{
- "id": 24,
- "tag": "NWB"
+ "id": 7,
+ "tag": "OSBv1"
},
{
- "id": 5185,
- "tag": "Optical Sectioning"
+ "id": 9,
+ "tag": "Rodent"
},
{
- "id": 5186,
- "tag": "Skull"
+ "id": 95,
+ "tag": "Olfactory bulb"
},
{
- "id": 5187,
- "tag": "Two-Photon Microscopy"
+ "id": 96,
+ "tag": "Olfactory system"
},
{
- "id": 5188,
- "tag": "Vasculature"
+ "id": 124,
+ "tag": "MOOSE"
}
],
- "timestamp_created": "2025-08-14 11:20:25.667438+00:00",
+ "timestamp_created": "2026-07-29 10:18:51+00:00",
"timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/001460/draft",
+ "uri": "https://github.com/adityagilra/olfactory-bulb",
"user": {
- "email": "info@opensourcebrain.org",
+ "email": "osbadmin@opensourcebrain.org",
"first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
+ "id": "897f31bd-b8a4-49bb-97e1-309a12ee6dac",
"last_name": "Admin",
"username": "osbadmin"
},
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
+ "user_id": "897f31bd-b8a4-49bb-97e1-309a12ee6dac"
},
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"auto_sync": true,
- "content_types": "experimental",
+ "content_types": "modeling",
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- "experimental"
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],
- "default_context": "0.250602.1536",
- "id": 3632,
- "name": "1R01NS138075-01",
- "repository_type": "dandi",
- "summary": "Neural circuit mechanisms for a mirror-induced self-directed behavior. in vivo calcium imaging from ACC neurons and animal behavior data during mirror exposure for 5 days.",
+ "default_context": "master",
+ "id": 91,
+ "name": "Olfactory Bulb Network Model - O'Connor, Angelo and Jacob 2012",
+ "repository_type": "github",
+ "summary": "\r\nA model of olfactory bulb mitral cells connected by apical dendrite gap junctions in a glomerular network\r\n",
"tags": [
{
- "id": 181,
- "tag": "DANDI"
+ "id": 7,
+ "tag": "OSBv1"
},
{
- "id": 5189,
- "tag": "DANDI:001462"
+ "id": 9,
+ "tag": "Rodent"
},
{
- "id": 194,
- "tag": "Mus musculus - House mouse"
+ "id": 10,
+ "tag": "neuroConstruct"
},
{
- "id": 24,
- "tag": "NWB"
+ "id": 95,
+ "tag": "Olfactory bulb"
},
{
- "id": 5190,
- "tag": "in vivo calcium imaging, ACC"
+ "id": 96,
+ "tag": "Olfactory system"
+ },
+ {
+ "id": 125,
+ "tag": "Mitral cell network"
}
],
- "timestamp_created": "2025-08-14 11:20:27.081438+00:00",
+ "timestamp_created": "2026-07-29 10:18:51+00:00",
"timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/001462/draft",
+ "uri": "https://github.com/Simon-at-Ely/OlfactoryBulbMitralCell",
"user": {
- "email": "info@opensourcebrain.org",
+ "email": "osbadmin@opensourcebrain.org",
"first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
+ "id": "897f31bd-b8a4-49bb-97e1-309a12ee6dac",
"last_name": "Admin",
"username": "osbadmin"
},
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
+ "user_id": "897f31bd-b8a4-49bb-97e1-309a12ee6dac"
},
- "3633": {
+ "92": {
"auto_sync": true,
- "content_types": "experimental",
+ "content_types": "modeling",
"content_types_list": [
- "experimental"
+ "modeling"
],
- "default_context": "0.250626.1929",
- "id": 3633,
- "name": "20250627_AIBS_Patchseq_human",
- "repository_type": "dandi",
- "summary": "HMBA Lein PatchSeq upload (human) (Q2 2025)",
+ "default_context": "master",
+ "id": 92,
+ "name": "OpenCortex",
+ "repository_type": "github",
+ "summary": "",
"tags": [
{
- "id": 181,
- "tag": "DANDI"
+ "id": 5,
+ "tag": "Neocortex"
},
{
- "id": 5191,
- "tag": "DANDI:001464"
+ "id": 7,
+ "tag": "OSBv1"
},
{
- "id": 262,
- "tag": "Homo sapiens - Human"
+ "id": 12,
+ "tag": "Network"
},
{
- "id": 24,
- "tag": "NWB"
+ "id": 25,
+ "tag": "Generic"
},
{
- "id": 5115,
- "tag": "Patch-seq, human, multimodal"
+ "id": 29,
+ "tag": "NeuroML2"
}
],
- "timestamp_created": "2025-08-14 11:20:28.535545+00:00",
+ "timestamp_created": "2026-07-29 10:18:51+00:00",
"timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/001464/draft",
+ "uri": "https://github.com/OpenSourceBrain/OpenCortex",
"user": {
- "email": "info@opensourcebrain.org",
+ "email": "osbadmin@opensourcebrain.org",
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+ "repository_type": "github",
+ "summary": "",
"tags": [
{
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 5220,
- "tag": "DANDI:001534"
+ "id": 7,
+ "tag": "OSBv1"
},
{
- "id": 194,
- "tag": "Mus musculus - House mouse"
+ "id": 10,
+ "tag": "neuroConstruct"
},
{
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+ "id": 42,
+ "tag": "Drosophila"
},
{
- "id": 5221,
- "tag": "Patch-seq, mouse"
+ "id": 43,
+ "tag": "Multiple"
}
],
- "timestamp_created": "2025-08-14 11:20:57.607399+00:00",
+ "timestamp_created": "2026-07-29 10:18:57+00:00",
"timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/001534/draft",
+ "uri": "https://github.com/OpenSourceBrain/TobinEtAl2017",
"user": {
- "email": "info@opensourcebrain.org",
+ "email": "osbadmin@opensourcebrain.org",
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- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
+ "id": "897f31bd-b8a4-49bb-97e1-309a12ee6dac",
"last_name": "Admin",
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},
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
+ "user_id": "897f31bd-b8a4-49bb-97e1-309a12ee6dac"
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],
- "default_context": "0.250714.1218",
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- "name": "Sampling representational plasticity of simple imagined movements across days enables long-term neuroprosthetic control",
- "repository_type": "dandi",
- "summary": "Long-term electrocorticographic (ECoG) training data during contextual brain computer interface (BCI) control in a tetraplegic human participant. The data uploaded represent long-term recordings from a 128 channel ECoG grid over contralateral sensorimotor cortex when trying to access directions in 3D space (6 axial directions plus 1 for the origin for a total of 7 directional targets). Data from individual variable length training trials from these long-term recordings have been collated and uploaded for the development and testing of novel BCI decoding architectures. For example, these trials can be used to train proficient deep learning neural network based BCI decoders to discern directional control. The trials are collated from a multitude of BCI contexts e.g., control in a virtual environment, with a physical real-world robot, during open loop and closed loop control. The neural features are a combination of high gamma amplitude activity (70-150Hz) and low-frequency motor cortical potentials (<25Hz), down sampled from the original 1KhZ sampling rate to 100Hz. Paper describing the scientific rationale, engineering approach, signal processing, experiments, data and a baseline deep learning decoder (stacked bi-directional LSTMs) can be found here: https://www.cell.com/cell/fulltext/S0092-8674(25)00157-6 ",
+ "default_context": "master",
+ "id": 110,
+ "name": "Network models of V1",
+ "repository_type": "github",
+ "summary": "",
"tags": [
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- "id": 181,
- "tag": "DANDI"
+ "id": 84,
+ "tag": "Google Summer of Code"
+ },
+ {
+ "id": 5,
+ "tag": "Neocortex"
+ },
+ {
+ "id": 6,
+ "tag": "Network model"
},
{
- "id": 5222,
- "tag": "DANDI:001535"
+ "id": 7,
+ "tag": "OSBv1"
},
{
- "id": 5223,
- "tag": "ECoG, Human, BCI"
+ "id": 28,
+ "tag": "Point neuron network"
},
{
- "id": 262,
- "tag": "Homo sapiens - Human"
+ "id": 147,
+ "tag": "PyNN"
},
{
- "id": 24,
- "tag": "NWB"
+ "id": 9,
+ "tag": "Rodent"
+ },
+ {
+ "id": 71,
+ "tag": "Visual system"
}
],
- "timestamp_created": "2025-08-14 11:20:59.150503+00:00",
+ "timestamp_created": "2026-07-29 10:18:57+00:00",
"timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/001535/draft",
+ "uri": "https://github.com/OpenSourceBrain/V1NetworkModels",
"user": {
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+ "email": "osbadmin@opensourcebrain.org",
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},
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
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],
- "default_context": "draft",
- "id": 3655,
- "name": "Capillaries susceptible to frequent stall dynamics revealed by comparing OCT and Bessel-2PM measurements",
- "repository_type": "dandi",
- "summary": "Transient stoppages of red blood cell (RBC) flow through capillaries\u2014termed capillary stalls\u2014occur persistently in neurological disorders such as Alzheimer\u2019s disease and ischemic stroke and can interrupt oxygen delivery and exacerbate neurological damage. Effective imaging tools and analyses are necessary to understand the nature, role, and prevention of stalls. In this study, we dissect differences in stalls measured by two-photon Bessel beam microscopy (Bessel-2PM) and optical coherence tomography (OCT) to gain insight into the temporal dynamics of stalls. Twenty-minute series of volumetric angiograms were obtained separately with Bessel-2PM and OCT on the same day in awake, head-fixed mice. The temporal dynamics of stalling in both methods revealed a minority population of susceptible capillaries that exhibited frequent stalls and a large majority of capillaries with infrequent stalls. Differences between OCT and Bessel-2PM in the repeatability and dynamics of stalls are explained by differences in their sensitivity to short or infrequent stalls based on scanning speed and detection off-time. Finally, stroke caused a shift toward the frequently stalling capillary subpopulation, lasting 1 week post-stroke. Dynamic stall analysis therefore enables examination of physiological and methodological contributions to the stalls measured in disease models and across studies.",
+ "default_context": "master",
+ "id": 111,
+ "name": "VERTEX Showcase",
+ "repository_type": "github",
+ "summary": "",
"tags": [
{
- "id": 181,
- "tag": "DANDI"
+ "id": 5,
+ "tag": "Neocortex"
},
{
- "id": 5224,
- "tag": "DANDI:001537"
+ "id": 6,
+ "tag": "Network model"
},
{
- "id": 194,
- "tag": "Mus musculus - House mouse"
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+ "tag": "OSBv1"
},
{
- "id": 24,
- "tag": "NWB"
+ "id": 9,
+ "tag": "Rodent"
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+ {
+ "id": 85,
+ "tag": "MATLAB"
}
],
- "timestamp_created": "2025-08-14 11:21:00.578928+00:00",
+ "timestamp_created": "2026-07-29 10:18:57+00:00",
"timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/001537/draft",
+ "uri": "https://github.com/OpenSourceBrain/VERTEXShowcase",
"user": {
- "email": "info@opensourcebrain.org",
+ "email": "osbadmin@opensourcebrain.org",
"first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
+ "id": "897f31bd-b8a4-49bb-97e1-309a12ee6dac",
"last_name": "Admin",
"username": "osbadmin"
},
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
+ "user_id": "897f31bd-b8a4-49bb-97e1-309a12ee6dac"
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],
- "default_context": "0.250804.1538",
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- "name": "Odor-Place Spatial Association Task",
- "repository_type": "dandi",
- "summary": "Hippocampal-prefrontal-olfactory bulb recordings in rats during an Odor-Place Spatial Association Task. Data includes spikes from single units, local field potential recordings, position (x, y, velocity), and trial information. Trial information includes nose-poke on/off times, whether the trial was rewarded or not, and time at the reward well. Each file contains sessions from a single day. Behavioral sessions may include data from standard odor-place, novel odor, or no odor sessions.",
+ "default_context": "master",
+ "id": 112,
+ "name": "Golgi Cell Network - Vervaeke et al 2010",
+ "repository_type": "github",
+ "summary": "",
"tags": [
{
- "id": 5225,
- "tag": "Associative memory"
- },
- {
- "id": 5226,
- "tag": "Beta rhythm"
- },
- {
- "id": 181,
- "tag": "DANDI"
+ "id": 46,
+ "tag": "Cerebellum"
},
{
- "id": 5227,
- "tag": "DANDI:001539"
+ "id": 3,
+ "tag": "Detailed cell model"
},
{
- "id": 439,
- "tag": "Hippocampus"
+ "id": 144,
+ "tag": "Gap junctions"
},
{
- "id": 24,
- "tag": "NWB"
+ "id": 33,
+ "tag": "Interneuron"
},
{
- "id": 5228,
- "tag": "Odor-place association"
+ "id": 6,
+ "tag": "Network model"
},
{
- "id": 662,
- "tag": "Olfactory bulb"
+ "id": 7,
+ "tag": "OSBv1"
},
{
- "id": 398,
- "tag": "Prefrontal cortex"
+ "id": 9,
+ "tag": "Rodent"
},
{
- "id": 205,
- "tag": "Rattus norvegicus - Norway rat"
+ "id": 10,
+ "tag": "neuroConstruct"
}
],
- "timestamp_created": "2025-08-14 11:21:02.030041+00:00",
+ "timestamp_created": "2026-07-29 10:18:58+00:00",
"timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/001539/draft",
+ "uri": "https://github.com/OpenSourceBrain/VervaekeEtAl-GolgiCellNetwork",
"user": {
- "email": "info@opensourcebrain.org",
+ "email": "osbadmin@opensourcebrain.org",
"first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
+ "id": "897f31bd-b8a4-49bb-97e1-309a12ee6dac",
"last_name": "Admin",
"username": "osbadmin"
},
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
+ "user_id": "897f31bd-b8a4-49bb-97e1-309a12ee6dac"
},
- "3657": {
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],
- "default_context": "draft",
- "id": 3657,
- "name": "Mapping of blood flow and slow speckle tissue dynamics using laser speckle contrast imaging",
- "repository_type": "dandi",
- "summary": "Laser speckle contrast imaging (LSCI) is a wide-field optical technique commonly used to monitor cerebral blood flow (CBF). Recently, we have discovered that besides the fast-decorrelating signals from blood flow, LSCI can also detect slow-decorrelating signals associated with cellular activity. The ability to image these signals has significant implications for various research areas such as ischemic stroke, as it enables longitudinal monitoring of both vascular and cellular dynamics, offering new biomarkers for tissue viability, injury progression, and therapeutic response. Here, we demonstrated that epi-illumination LSCI enables the mapping of both slow speckle dynamics (SSD) for evaluating cellular dynamics and traditional fast speckle dynamics (FSD) for evaluating CBF. We found that SSD signals are much more evident with epi-illumination than with conventional oblique illumination LSCI. Using mouse models of ischemic stroke, including both permanent and transient occlusion of the distal middle cerebral artery (dMCA), we demonstrated the system\u2019s ability to track stroke progression from minutes to days post-stroke. This study establishes a powerful, label-free imaging tool for investigating both cellular and vascular health during stroke core evolution.",
+ "default_context": "master",
+ "id": 113,
+ "name": "Virtual Fly Brain Showcase",
+ "repository_type": "github",
+ "summary": "\r\n\r\nShowcase of some *Drosophila melanogaster* neuronal morphologies processed by [Virtual Fly Brain](http://www.virtualflybrain.org) team. These will likely include examples based on raw data available from http://flybrain.stanford.edu and http://flycircuit.tw.\r\n",
"tags": [
{
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 5229,
- "tag": "DANDI:001541"
- },
- {
- "id": 194,
- "tag": "Mus musculus - House mouse"
+ "id": 7,
+ "tag": "OSBv1"
},
{
"id": 24,
- "tag": "NWB"
- },
- {
- "id": 5230,
- "tag": "blood flow"
- },
- {
- "id": 5231,
- "tag": "laser speckle"
+ "tag": "Neuronal reconstruction"
},
{
- "id": 4981,
- "tag": "stroke"
+ "id": 42,
+ "tag": "Drosophila"
},
{
- "id": 5232,
- "tag": "tissue dynamics"
+ "id": 43,
+ "tag": "Multiple"
}
],
- "timestamp_created": "2025-08-14 11:21:03.422776+00:00",
+ "timestamp_created": "2026-07-29 10:18:58+00:00",
"timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/001541/draft",
+ "uri": "https://github.com/jefferis/osb_vfb_showcase",
"user": {
- "email": "info@opensourcebrain.org",
+ "email": "osbadmin@opensourcebrain.org",
"first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
+ "id": "897f31bd-b8a4-49bb-97e1-309a12ee6dac",
"last_name": "Admin",
"username": "osbadmin"
},
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
+ "user_id": "897f31bd-b8a4-49bb-97e1-309a12ee6dac"
},
- "3658": {
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"auto_sync": true,
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],
- "default_context": "draft",
- "id": 3658,
- "name": "Neurovascular impulse response function (IRF) during spontaneous activity differentially reflects intrinsic neuromodulation across cortical regions",
- "repository_type": "dandi",
- "summary": "Ascending neuromodulatory projections from deep brain nuclei generate internal brain states that differentially engage specific neuronal cell types. Because neurovascular coupling is cell-type specific and neuromodulatory transmitters have vasoactive properties, we hypothesized that the impulse response function (IRF) linking spontaneous neuronal activity with hemodynamics would depend on neuromodulation. Here, we use widefield cortical imaging to observe the resting state relationship between population level neuronal Ca2+ activity, fluctuations in oxygenation and concentration of hemoglobin, and release of the vasoactive neuromodulators Norepinephrine (NE) and Acetylcholine (ACh). First, the IRF linking neuronal activity and the hemodynamic response failed to predict hemodynamic fluctuations during periods marked by higher arousal (high NE and pupil diameter). Second, hemodynamic fluctuations were well predicted by a regression model factoring in both Ca2+ activity and NE release. Third, Ca2+ and hemodynamic functional connectivity patterns diverged during periods of high arousal. Without accounting for NE neuromodulation and the associated vasoconstriction, diminished hemodynamic coherence, commonly referred to as \u201cfunctional (dys)connectivity\u201d in BOLD fMRI studies, can be falsely interpreted as neuronal desynchronizations.",
+ "default_context": "master",
+ "id": 114,
+ "name": "VierlingClaassenEtAl2010",
+ "repository_type": "github",
+ "summary": "",
"tags": [
{
- "id": 5008,
- "tag": "Acetylcholine"
- },
- {
- "id": 181,
- "tag": "DANDI"
- },
- {
- "id": 5233,
- "tag": "DANDI:001543"
- },
- {
- "id": 5010,
- "tag": "Functional connectivity"
+ "id": 5,
+ "tag": "Neocortex"
},
{
- "id": 5011,
- "tag": "Hemodynamics"
+ "id": 6,
+ "tag": "Network model"
},
{
- "id": 194,
- "tag": "Mus musculus - House mouse"
+ "id": 7,
+ "tag": "OSBv1"
},
{
- "id": 24,
- "tag": "NWB"
+ "id": 9,
+ "tag": "Rodent"
},
{
- "id": 5012,
- "tag": "Neurovascular coupling"
+ "id": 16,
+ "tag": "NEURON"
},
{
- "id": 5013,
- "tag": "Norepinephrine"
+ "id": 109,
+ "tag": "Network oscillations"
}
],
- "timestamp_created": "2025-08-14 11:21:04.922678+00:00",
+ "timestamp_created": "2026-07-29 10:18:58+00:00",
"timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/001543/draft",
+ "uri": "https://github.com/OpenSourceBrain/VierlingClaassenEtAl2010",
"user": {
- "email": "info@opensourcebrain.org",
+ "email": "osbadmin@opensourcebrain.org",
"first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
+ "id": "897f31bd-b8a4-49bb-97e1-309a12ee6dac",
"last_name": "Admin",
"username": "osbadmin"
},
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
+ "user_id": "897f31bd-b8a4-49bb-97e1-309a12ee6dac"
},
- "3659": {
+ "115": {
"auto_sync": true,
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+ "content_types": "modeling",
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+ "modeling"
],
- "default_context": "draft",
- "id": 3659,
- "name": "Distinct subpopulations of ventral pallidal cholinergic projection neurons encode valence of olfactory stimuli",
- "repository_type": "dandi",
- "summary": "The electrophysiological data included in Kim et al., Cell Reports 43(4), 114009 (2024).",
+ "default_context": "master",
+ "id": 115,
+ "name": "Balanced network with inhibitory plasticity - Vogels et al. 2011",
+ "repository_type": "github",
+ "summary": "\n\nNetwork model from: Vogels TP, Sprekeler H, Zenke F, Clopath C, Gerstner W (2011) [Inhibitory plasticity balances excitation and inhibition in sensory pathways and memory networks](http://www.sciencemag.org/content/334/6062/1569.abstract). Science 334:1569-73.\n\nSee the [[Wiki]] for more details.\n",
"tags": [
{
- "id": 181,
- "tag": "DANDI"
+ "id": 148,
+ "tag": "C/Matlab"
},
{
- "id": 5234,
- "tag": "DANDI:001544"
+ "id": 25,
+ "tag": "Generic"
},
{
- "id": 194,
- "tag": "Mus musculus - House mouse"
+ "id": 84,
+ "tag": "Google Summer of Code"
},
{
- "id": 24,
- "tag": "NWB"
+ "id": 149,
+ "tag": "Inhibition"
+ },
+ {
+ "id": 5,
+ "tag": "Neocortex"
+ },
+ {
+ "id": 6,
+ "tag": "Network model"
+ },
+ {
+ "id": 7,
+ "tag": "OSBv1"
},
{
- "id": 5235,
- "tag": "ventral pallidum, cholinergic, odor"
+ "id": 28,
+ "tag": "Point neuron network"
}
],
- "timestamp_created": "2025-08-14 11:21:06.523606+00:00",
+ "timestamp_created": "2026-07-29 10:18:59+00:00",
"timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/001544/draft",
+ "uri": "https://github.com/OpenSourceBrain/VogelsEtAl2011",
"user": {
- "email": "info@opensourcebrain.org",
+ "email": "osbadmin@opensourcebrain.org",
"first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
+ "id": "897f31bd-b8a4-49bb-97e1-309a12ee6dac",
"last_name": "Admin",
"username": "osbadmin"
},
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
+ "user_id": "897f31bd-b8a4-49bb-97e1-309a12ee6dac"
},
- "3660": {
+ "116": {
"auto_sync": true,
- "content_types": "experimental",
+ "content_types": "modeling",
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+ "modeling"
],
- "default_context": "0.250809.1653",
- "id": 3660,
- "name": "Diversification of dentate gyrus granule cell subtypes is regulated by Nrg1 nuclear back-signaling",
- "repository_type": "dandi",
- "summary": "The electrophysiological data of Rajebhosale et al., Life Science Alliance (2025). DOI: 10.26508/lsa.202403169.",
+ "default_context": "master",
+ "id": 116,
+ "name": "Wang & Buzsaki 1996",
+ "repository_type": "github",
+ "summary": "",
"tags": [
{
- "id": 181,
- "tag": "DANDI"
+ "id": 150,
+ "tag": "?"
},
{
- "id": 5236,
- "tag": "DANDI:001545"
+ "id": 31,
+ "tag": "Hippocampal formation"
},
{
- "id": 194,
- "tag": "Mus musculus - House mouse"
+ "id": 32,
+ "tag": "Hippocampus"
},
{
- "id": 24,
- "tag": "NWB"
+ "id": 33,
+ "tag": "Interneuron"
+ },
+ {
+ "id": 12,
+ "tag": "Network"
+ },
+ {
+ "id": 7,
+ "tag": "OSBv1"
},
{
- "id": 5237,
- "tag": "neuregulin, dentrate gyrus, granule cell, semilunar"
+ "id": 9,
+ "tag": "Rodent"
}
],
- "timestamp_created": "2025-08-14 11:21:07.936876+00:00",
+ "timestamp_created": "2026-07-29 10:18:59+00:00",
"timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/001545/draft",
+ "uri": "https://github.com/OpenSourceBrain/WangBuzsaki1996",
"user": {
- "email": "info@opensourcebrain.org",
+ "email": "osbadmin@opensourcebrain.org",
"first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
+ "id": "897f31bd-b8a4-49bb-97e1-309a12ee6dac",
"last_name": "Admin",
"username": "osbadmin"
},
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
+ "user_id": "897f31bd-b8a4-49bb-97e1-309a12ee6dac"
},
- "3661": {
+ "117": {
"auto_sync": true,
- "content_types": "experimental",
+ "content_types": "modeling",
"content_types_list": [
- "experimental"
+ "modeling"
],
- "default_context": "draft",
- "id": 3661,
- "name": "2-Photon Optimized Light-Beads-Microscopy Test Data",
- "repository_type": "dandi",
- "summary": "A single trial for the optimized Light Beads Microscopy 2-Photon Calcium Imaging module at the Miller Brain Observatory, Rockefeller University.",
+ "default_context": "master",
+ "id": 117,
+ "name": "Laminar organization of motor cortex - Weiler et al 2008",
+ "repository_type": "github",
+ "summary": "",
"tags": [
{
- "id": 181,
- "tag": "DANDI"
+ "id": 5,
+ "tag": "Neocortex"
+ },
+ {
+ "id": 6,
+ "tag": "Network model"
+ },
+ {
+ "id": 7,
+ "tag": "OSBv1"
+ },
+ {
+ "id": 9,
+ "tag": "Rodent"
},
{
- "id": 5238,
- "tag": "DANDI:001546"
+ "id": 85,
+ "tag": "MATLAB"
}
],
- "timestamp_created": "2025-08-14 11:21:09.387459+00:00",
+ "timestamp_created": "2026-07-29 10:18:59+00:00",
"timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/001546/draft",
+ "uri": "https://github.com/OpenSourceBrain/WeilerEtAl08-LaminarCortex",
"user": {
- "email": "info@opensourcebrain.org",
+ "email": "osbadmin@opensourcebrain.org",
"first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
+ "id": "897f31bd-b8a4-49bb-97e1-309a12ee6dac",
"last_name": "Admin",
"username": "osbadmin"
},
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
+ "user_id": "897f31bd-b8a4-49bb-97e1-309a12ee6dac"
},
- "3662": {
+ "118": {
"auto_sync": true,
- "content_types": "experimental",
+ "content_types": "modeling",
"content_types_list": [
- "experimental"
+ "modeling"
],
- "default_context": "draft",
- "id": 3662,
- "name": "Neural Spiking Data Responding to Transcranial Focused Ultrasound Stimulation in Freely Moving Rats",
- "repository_type": "dandi",
- "summary": "We performed Pavlovian cue-concurrent transcranial focused ultrasound stimulation (tFUS) stimulation during intracranial single-neuron recordings using a wearable array transducer targeting the nucleus accumbens (NAc) in awake and behaving rats. The stimulation was delivered with a 64-element array transducer. Experimental parameters included pulse repetition frequency (PRF), tone burst duration (TBD), total sonication time, and input voltage to Vantage ultrasound system (can be converted to pressure level). For example, the notation mou05_50_50_50_5 indicates the animal number, PRF (Hz), input voltage (v), TBD (microseconds), and total sonication time (sec), respectively. ",
+ "default_context": "master",
+ "id": 118,
+ "name": "Wilson and Cowan model",
+ "repository_type": "github",
+ "summary": "",
"tags": [
{
- "id": 181,
- "tag": "DANDI"
+ "id": 5,
+ "tag": "Neocortex"
},
{
- "id": 5239,
- "tag": "DANDI:001549"
+ "id": 7,
+ "tag": "OSBv1"
},
{
- "id": 24,
- "tag": "NWB"
+ "id": 12,
+ "tag": "Network"
+ },
+ {
+ "id": 25,
+ "tag": "Generic"
+ },
+ {
+ "id": 92,
+ "tag": "Rate based model"
},
{
- "id": 205,
- "tag": "Rattus norvegicus - Norway rat"
+ "id": 141,
+ "tag": "Neuron"
}
],
- "timestamp_created": "2025-08-14 11:21:10.924189+00:00",
+ "timestamp_created": "2026-07-29 10:18:59+00:00",
"timestamp_updated": "---",
- "uri": "https://dandiarchive.org/dandiset/001549/draft",
+ "uri": "https://github.com/OpenSourceBrain/WilsonCowan",
"user": {
- "email": "info@opensourcebrain.org",
+ "email": "osbadmin@opensourcebrain.org",
"first_name": "OSB",
- "id": "095e311e-336f-47d6-b4f6-16f6dd771a8d",
+ "id": "897f31bd-b8a4-49bb-97e1-309a12ee6dac",
"last_name": "Admin",
"username": "osbadmin"
},
- "user_id": "095e311e-336f-47d6-b4f6-16f6dd771a8d"
+ "user_id": "897f31bd-b8a4-49bb-97e1-309a12ee6dac"
},
- "3663": {
+ "119": {
"auto_sync": true,
- "content_types": "experimental",
+ "content_types": "modeling",
"content_types_list": [
- "experimental"
+ "modeling"
],
- "default_context": "1",
- "id": 3663,
- "name": "Data from Dynamics of Inhibitory Golgi Interneurons in the Cerebellar Cortex: Gurnani and Silver 2021",
- "repository_type": "figshare",
- "summary": "Population imaging of cerebellar Golgi cells in Crus I/II and lobule IV/V (vermis) of awake, head-fixed mice.",
+ "default_context": "main",
+ "id": 119,
+ "name": "Worm2D",
+ "repository_type": "github",
+ "summary": "",
"tags": [
{
- "id": 5240,
- "tag": "cerebellum"
+ "id": 7,
+ "tag": "OSBv1"
},
{
- "id": 5241,
- "tag": "golgi-cells"
+ "id": 19,
+ "tag": "C. elegans"
},
{
- "id": 5242,
- "tag": "gap-junctions"
+ "id": 20,
+ "tag": "Nervous system"
},
{
- "id": 5243,
- "tag": "cerebellar-cortex"
+ "id": 21,
+ "tag": "OpenWorm"
},
{
- "id": 5244,
- "tag": "calcium-imaging"
+ "id": 104,
+ "tag": "Cplusplus"
},
{
- "id": 55,
- "tag": "mice"
+ "id": 151,
+ "tag": "Neurons"
}
],
- "timestamp_created": "2025-08-18 15:43:14.933684+00:00",
+ "timestamp_created": "2026-07-29 10:19:00+00:00",
"timestamp_updated": "---",
- "uri": "https://rdr.ucl.ac.uk/articles/dataset/All_Preprocessed_Datasets_for_Gurnani_and_Silver_2021/14364845",
+ "uri": "https://github.com/openworm/CE_locomotion",
"user": {
- "email": "ankur.sinha@ucl.ac.uk",
- "first_name": "Ankur",
- "id": "f09f4521-4323-415d-b388-8160ae858d57",
- "last_name": "Sinha",
- "username": "ankursinha"
+ "email": "osbadmin@opensourcebrain.org",
+ "first_name": "OSB",
+ "id": "897f31bd-b8a4-49bb-97e1-309a12ee6dac",
+ "last_name": "Admin",
+ "username": "osbadmin"
},
- "user_id": "f09f4521-4323-415d-b388-8160ae858d57"
+ "user_id": "897f31bd-b8a4-49bb-97e1-309a12ee6dac"
}
}
}
\ No newline at end of file
diff --git a/libraries/client/loadosbv1.py b/libraries/client/loadosbv1.py
index aff871b3..d9d30b32 100644
--- a/libraries/client/loadosbv1.py
+++ b/libraries/client/loadosbv1.py
@@ -39,7 +39,7 @@
index = 0
min_index = 0
-max_index = 1000
+max_index = 3000
verbose = True
verbose = False
From ba7224daaa8d4bc364f10d2794f641e624e250bf Mon Sep 17 00:00:00 2001
From: Padraig Gleeson
Date: Wed, 29 Jul 2026 12:04:10 +0100
Subject: [PATCH 3/9] Update jupyterlab helper scripts
---
.github/workflows/docker-jupyterlab.yml | 9 +++++----
applications/jupyterlab/build_local.sh | 13 +++++++++++++
applications/jupyterlab/pip_omv_info.sh | 8 ++++++++
applications/jupyterlab/rebuild_local.sh | 13 +++++++++++++
applications/jupyterlab/run_local.sh | 8 ++++++++
5 files changed, 47 insertions(+), 4 deletions(-)
create mode 100755 applications/jupyterlab/build_local.sh
create mode 100755 applications/jupyterlab/pip_omv_info.sh
create mode 100755 applications/jupyterlab/rebuild_local.sh
create mode 100755 applications/jupyterlab/run_local.sh
diff --git a/.github/workflows/docker-jupyterlab.yml b/.github/workflows/docker-jupyterlab.yml
index 56a8ab49..c9e4f908 100644
--- a/.github/workflows/docker-jupyterlab.yml
+++ b/.github/workflows/docker-jupyterlab.yml
@@ -1,4 +1,4 @@
-name: Docker Image Build Jupyterlab
+name: Docker Image Build JupyterLab
on:
push:
@@ -13,12 +13,12 @@ jobs:
runs-on: ubuntu-latest
steps:
- - uses: actions/checkout@v3
+ - uses: actions/checkout@v7
- name: Build the Docker image
run: |
cd applications/jupyterlab
- docker build -t myjlab -f Dockerfile --no-cache .
+ ./build_local.sh
- name: Info on Docker image sizes
run: |
@@ -26,4 +26,5 @@ jobs:
- name: Run the Docker container and list python installs
run: |
- docker run -t --rm --entrypoint /bin/bash myjlab -c "pip3 list"
+ cd applications/jupyterlab
+ ./pip_omv_info.sh
diff --git a/applications/jupyterlab/build_local.sh b/applications/jupyterlab/build_local.sh
new file mode 100755
index 00000000..4eebcecc
--- /dev/null
+++ b/applications/jupyterlab/build_local.sh
@@ -0,0 +1,13 @@
+#!/bin/bash
+set -ex
+
+# Set the platform flag if we're on ARM
+arch=$(uname -m)
+if [[ "$arch" == "arm64" || "$arch" == "aarch64" ]]; then
+ platform_flag="--platform linux/amd64"
+else
+ platform_flag=""
+fi
+
+time DOCKER_BUILDKIT=1 docker build $platform_flag -t myjlab -f Dockerfile .
+
diff --git a/applications/jupyterlab/pip_omv_info.sh b/applications/jupyterlab/pip_omv_info.sh
new file mode 100755
index 00000000..c3b56a48
--- /dev/null
+++ b/applications/jupyterlab/pip_omv_info.sh
@@ -0,0 +1,8 @@
+#!/bin/bash
+set -e
+
+# A script to print info versions of packages in the JupyterLab container
+
+docker run -t --rm --entrypoint /bin/bash myjlab -c "pip3 list"
+echo "--------------------------------------------------------"
+docker run -t --rm --entrypoint /bin/bash myjlab -c "omv list -V"
diff --git a/applications/jupyterlab/rebuild_local.sh b/applications/jupyterlab/rebuild_local.sh
new file mode 100755
index 00000000..15eca6be
--- /dev/null
+++ b/applications/jupyterlab/rebuild_local.sh
@@ -0,0 +1,13 @@
+#!/bin/bash
+set -ex
+
+# Set the platform flag if we're on ARM
+arch=$(uname -m)
+if [[ "$arch" == "arm64" || "$arch" == "aarch64" ]]; then
+ platform_flag="--platform linux/amd64"
+else
+ platform_flag=""
+fi
+
+time DOCKER_BUILDKIT=1 docker build $platform_flag -t myjlab -f Dockerfile --no-cache .
+
diff --git a/applications/jupyterlab/run_local.sh b/applications/jupyterlab/run_local.sh
new file mode 100755
index 00000000..269054b7
--- /dev/null
+++ b/applications/jupyterlab/run_local.sh
@@ -0,0 +1,8 @@
+#!/bin/bash
+set -e
+
+# A script to run the JupyterLab container locally (build it first with ./build_local.sh)
+
+docker run --network host -it --rm --name myjupyterlab myjlab
+
+
From 3ebaef362e4ca2243121b5e076324bc773797265 Mon Sep 17 00:00:00 2001
From: Padraig Gleeson
Date: Wed, 29 Jul 2026 14:28:11 +0100
Subject: [PATCH 4/9] Allow nwb docker build to run on mac
---
applications/nwb-explorer/build_local.sh | 10 +++++++++-
1 file changed, 9 insertions(+), 1 deletion(-)
diff --git a/applications/nwb-explorer/build_local.sh b/applications/nwb-explorer/build_local.sh
index 74bf2697..b9f25fde 100755
--- a/applications/nwb-explorer/build_local.sh
+++ b/applications/nwb-explorer/build_local.sh
@@ -1,4 +1,12 @@
#!/bin/bash
set -e
-time DOCKER_BUILDKIT=1 docker build -t mynwbosb -f Dockerfile .
+# Set the platform flag if we're on ARM
+arch=$(uname -m)
+if [[ "$arch" == "arm64" || "$arch" == "aarch64" ]]; then
+ platform_flag="--platform linux/amd64"
+else
+ platform_flag=""
+fi
+
+time DOCKER_BUILDKIT=1 docker build $platform_flag -t mynwbosb -f Dockerfile .
From 366dafa74f283f5150529317cdbee42eec082ffb Mon Sep 17 00:00:00 2001
From: Padraig Gleeson
Date: Fri, 31 Jul 2026 11:58:38 +0100
Subject: [PATCH 5/9] Updated cached files
---
libraries/client/cached_info/osb_gh.json | 22 +++++++++----------
libraries/client/cached_info/repos_v2dev.json | 2 +-
2 files changed, 12 insertions(+), 12 deletions(-)
diff --git a/libraries/client/cached_info/osb_gh.json b/libraries/client/cached_info/osb_gh.json
index a29ab4f0..0df257b3 100644
--- a/libraries/client/cached_info/osb_gh.json
+++ b/libraries/client/cached_info/osb_gh.json
@@ -215589,7 +215589,7 @@
"private": false,
"pull_request_creation_policy": "all",
"pulls_url": "https://api.github.com/repos/OpenSourceBrain/M1NetworkModel/pulls{/number}",
- "pushed_at": "2025-08-22T11:38:39Z",
+ "pushed_at": "2026-07-30T10:28:44Z",
"releases_url": "https://api.github.com/repos/OpenSourceBrain/M1NetworkModel/releases{/id}",
"size": 16896,
"ssh_url": "git@github.com:OpenSourceBrain/M1NetworkModel.git",
@@ -217670,8 +217670,8 @@
"name": "NetPyNEShowcase",
"node_id": "MDEwOlJlcG9zaXRvcnk1ODY2MzkzOA==",
"notifications_url": "https://api.github.com/repos/OpenSourceBrain/NetPyNEShowcase/notifications{?since,all,participating}",
- "open_issues": 2,
- "open_issues_count": 2,
+ "open_issues": 4,
+ "open_issues_count": 4,
"owner": {
"avatar_url": "https://avatars.githubusercontent.com/u/1565478?v=4",
"events_url": "https://api.github.com/users/OpenSourceBrain/events{/privacy}",
@@ -217703,9 +217703,9 @@
"private": false,
"pull_request_creation_policy": "all",
"pulls_url": "https://api.github.com/repos/OpenSourceBrain/NetPyNEShowcase/pulls{/number}",
- "pushed_at": "2026-07-27T17:27:07Z",
+ "pushed_at": "2026-07-30T10:48:20Z",
"releases_url": "https://api.github.com/repos/OpenSourceBrain/NetPyNEShowcase/releases{/id}",
- "size": 4927,
+ "size": 4932,
"ssh_url": "git@github.com:OpenSourceBrain/NetPyNEShowcase.git",
"stargazers_count": 4,
"stargazers_url": "https://api.github.com/repos/OpenSourceBrain/NetPyNEShowcase/stargazers",
@@ -217717,7 +217717,7 @@
"teams_url": "https://api.github.com/repos/OpenSourceBrain/NetPyNEShowcase/teams",
"topics": [],
"trees_url": "https://api.github.com/repos/OpenSourceBrain/NetPyNEShowcase/git/trees{/sha}",
- "updated_at": "2026-04-13T12:09:13Z",
+ "updated_at": "2026-07-30T10:48:36Z",
"url": "https://api.github.com/repos/OpenSourceBrain/NetPyNEShowcase",
"visibility": "public",
"watchers": 4,
@@ -219507,9 +219507,9 @@
"private": false,
"pull_request_creation_policy": "all",
"pulls_url": "https://api.github.com/repos/OpenSourceBrain/OSBv2/pulls{/number}",
- "pushed_at": "2026-07-29T09:17:12Z",
+ "pushed_at": "2026-07-29T11:04:19Z",
"releases_url": "https://api.github.com/repos/OpenSourceBrain/OSBv2/releases{/id}",
- "size": 62761,
+ "size": 62827,
"ssh_url": "git@github.com:OpenSourceBrain/OSBv2.git",
"stargazers_count": 21,
"stargazers_url": "https://api.github.com/repos/OpenSourceBrain/OSBv2/stargazers",
@@ -220272,8 +220272,8 @@
"name": "PospischilEtAl2008",
"node_id": "MDEwOlJlcG9zaXRvcnk2NTgwMDM5",
"notifications_url": "https://api.github.com/repos/OpenSourceBrain/PospischilEtAl2008/notifications{?since,all,participating}",
- "open_issues": 10,
- "open_issues_count": 10,
+ "open_issues": 9,
+ "open_issues_count": 9,
"owner": {
"avatar_url": "https://avatars.githubusercontent.com/u/1565478?v=4",
"events_url": "https://api.github.com/users/OpenSourceBrain/events{/privacy}",
@@ -220305,7 +220305,7 @@
"private": false,
"pull_request_creation_policy": "all",
"pulls_url": "https://api.github.com/repos/OpenSourceBrain/PospischilEtAl2008/pulls{/number}",
- "pushed_at": "2025-11-25T20:37:01Z",
+ "pushed_at": "2026-07-29T11:19:44Z",
"releases_url": "https://api.github.com/repos/OpenSourceBrain/PospischilEtAl2008/releases{/id}",
"size": 5094,
"ssh_url": "git@github.com:OpenSourceBrain/PospischilEtAl2008.git",
diff --git a/libraries/client/cached_info/repos_v2dev.json b/libraries/client/cached_info/repos_v2dev.json
index 543cb83d..eea11d25 100644
--- a/libraries/client/cached_info/repos_v2dev.json
+++ b/libraries/client/cached_info/repos_v2dev.json
@@ -43,7 +43,7 @@
"email": "a@aa.it",
"first_name": "a",
"id": "92a19922-2954-4d08-8983-b62b14fd1ec8",
- "last_name": "a",
+ "last_name": "b",
"username": "aaa"
},
"user_id": "92a19922-2954-4d08-8983-b62b14fd1ec8"
From 95fab50b2e2dfa2c75e6548b00f25f1ef69f4d18 Mon Sep 17 00:00:00 2001
From: Padraig Gleeson
Date: Fri, 31 Jul 2026 12:12:40 +0100
Subject: [PATCH 6/9] Add some biomodles
---
libraries/client/cached_info/repos_v2dev.json | 606 ++++++++++++------
1 file changed, 405 insertions(+), 201 deletions(-)
diff --git a/libraries/client/cached_info/repos_v2dev.json b/libraries/client/cached_info/repos_v2dev.json
index eea11d25..c4b1c066 100644
--- a/libraries/client/cached_info/repos_v2dev.json
+++ b/libraries/client/cached_info/repos_v2dev.json
@@ -3,18 +3,18 @@
"content_types": {
"experimental": 1,
"experimental,modeling": 0,
- "modeling": 115,
+ "modeling": 119,
"modeling,experimental": 0
},
"repository_type": {
- "biomodels": 0,
+ "biomodels": 4,
"dandi": 0,
"figshare": 0,
"github": 116
},
"user_repos": {
"aaa": 1,
- "osbadmin": 114,
+ "osbadmin": 118,
"testpat3": 1
}
},
@@ -452,18 +452,6 @@
"repository_type": "github",
"summary": "",
"tags": [
- {
- "id": 25,
- "tag": "Generic"
- },
- {
- "id": 26,
- "tag": "Integrate and fire neuron"
- },
- {
- "id": 27,
- "tag": "NEST"
- },
{
"id": 5,
"tag": "Neocortex"
@@ -476,6 +464,18 @@
"id": 7,
"tag": "OSBv1"
},
+ {
+ "id": 25,
+ "tag": "Generic"
+ },
+ {
+ "id": 26,
+ "tag": "Integrate and fire neuron"
+ },
+ {
+ "id": 27,
+ "tag": "NEST"
+ },
{
"id": 28,
"tag": "Point neuron network"
@@ -884,6 +884,14 @@
"repository_type": "github",
"summary": "\r\n\r\n**The latest version of this model can be found at http://www.opensourcebrain.org/projects/c302**\r\nNote: the development of the OpenWorm model of [C. elegans](http://en.wikipedia.org/wiki/Caenorhabditis_elegans) is taking place at [http://www.openworm.org](http://www.openworm.org).\r\n\r\nA full list of those involved in that project can be found [here](http://www.openworm.org/people.html).\r\n\r\nThe C. elegans 3D model this was derived from was produced by Dr. Christian Grove and Dr. Paul Sternberg at the VirtualWorm project (WormBase, CalTech) and released into the public domain. You can visit the VirtualWorm home page at http://caltech.wormbase.org/virtualworm/ .\r\n\r\nFor details on running this neuroConstruct project see: https://github.com/openworm/OpenWorm/wiki/Running-the-C.-elegans-model-in-neuroConstruct.\r\n\r\nThis is a **work in progress**. Please [get in contact](http://www.openworm.org/contacts.html) for more information.\r\n",
"tags": [
+ {
+ "id": 6,
+ "tag": "Network model"
+ },
+ {
+ "id": 7,
+ "tag": "OSBv1"
+ },
{
"id": 18,
"tag": "Blender"
@@ -896,14 +904,6 @@
"id": 20,
"tag": "Nervous system"
},
- {
- "id": 6,
- "tag": "Network model"
- },
- {
- "id": 7,
- "tag": "OSBv1"
- },
{
"id": 21,
"tag": "OpenWorm"
@@ -994,22 +994,10 @@
"repository_type": "github",
"summary": "Multicompartmental model of cerebellar Golgi cell from: Solinas S, Forti L, Cesana E, Mapelli J, De Schutter E, D\u2019Angelo E. **Computational reconstruction of pacemaking and intrinsic electroresponsiveness in cerebellar Golgi cells**. [Front Cell Neurosci. 2007;1:2](http://journal.frontiersin.org/article/10.3389/neuro.03.002.2007/abstract). \r\n\r\nBased on implementation in NEURON taken from: http://senselab.med.yale.edu/modeldb/ShowModel.asp?model=112685.\r\n",
"tags": [
- {
- "id": 46,
- "tag": "Cerebellum"
- },
{
"id": 3,
"tag": "Detailed cell model"
},
- {
- "id": 47,
- "tag": "Golgi cell"
- },
- {
- "id": 16,
- "tag": "NEURON"
- },
{
"id": 7,
"tag": "OSBv1"
@@ -1021,6 +1009,18 @@
{
"id": 10,
"tag": "neuroConstruct"
+ },
+ {
+ "id": 16,
+ "tag": "NEURON"
+ },
+ {
+ "id": 46,
+ "tag": "Cerebellum"
+ },
+ {
+ "id": 47,
+ "tag": "Golgi cell"
}
],
"timestamp_created": "2026-07-27 16:26:56+00:00",
@@ -1252,18 +1252,6 @@
"repository_type": "github",
"summary": "Network simulations of self-sustained activity in networks of adaptive exponential integrate and fire neurons.\r\n\r\nFrom: Self-sustained asynchronous irregular states and Up\u2013Down states in thalamic, cortical and thalamocortical networks of nonlinear integrate-and-fire neurons, Alain Destexhe, [J Comp Neuroscience 2009](http://link.springer.com/article/10.1007%2Fs10827-009-0164-4)\r\n",
"tags": [
- {
- "id": 55,
- "tag": "Adaptive exponential integrate and fire neuron"
- },
- {
- "id": 25,
- "tag": "Generic"
- },
- {
- "id": 16,
- "tag": "NEURON"
- },
{
"id": 5,
"tag": "Neocortex"
@@ -1276,9 +1264,21 @@
"id": 7,
"tag": "OSBv1"
},
+ {
+ "id": 16,
+ "tag": "NEURON"
+ },
+ {
+ "id": 25,
+ "tag": "Generic"
+ },
{
"id": 28,
"tag": "Point neuron network"
+ },
+ {
+ "id": 55,
+ "tag": "Adaptive exponential integrate and fire neuron"
}
],
"timestamp_created": "2026-07-29 10:14:21+00:00",
@@ -1354,6 +1354,10 @@
"id": 3,
"tag": "Detailed cell model"
},
+ {
+ "id": 7,
+ "tag": "OSBv1"
+ },
{
"id": 42,
"tag": "Drosophila"
@@ -1366,10 +1370,6 @@
"id": 59,
"tag": "Neuromuscular system"
},
- {
- "id": 7,
- "tag": "OSBv1"
- },
{
"id": 60,
"tag": "XPP; NEURON"
@@ -1403,33 +1403,33 @@
"repository_type": "github",
"summary": "\r\n\r\nIn early stages of development!\r\n\r\nCell model based on pubmed:19439602. \r\n",
"tags": [
- {
- "id": 62,
- "tag": "Antennal lobe"
- },
{
"id": 3,
"tag": "Detailed cell model"
},
{
- "id": 42,
- "tag": "Drosophila"
+ "id": 7,
+ "tag": "OSBv1"
+ },
+ {
+ "id": 10,
+ "tag": "neuroConstruct"
},
{
"id": 16,
"tag": "NEURON"
},
{
- "id": 7,
- "tag": "OSBv1"
+ "id": 42,
+ "tag": "Drosophila"
},
{
- "id": 63,
- "tag": "Projection neuron"
+ "id": 62,
+ "tag": "Antennal lobe"
},
{
- "id": 10,
- "tag": "neuroConstruct"
+ "id": 63,
+ "tag": "Projection neuron"
}
],
"timestamp_created": "2026-07-29 10:14:22+00:00",
@@ -1562,10 +1562,6 @@
"id": 4,
"tag": "GENESIS"
},
- {
- "id": 25,
- "tag": "Generic"
- },
{
"id": 5,
"tag": "Neocortex"
@@ -1578,6 +1574,10 @@
"id": 7,
"tag": "OSBv1"
},
+ {
+ "id": 25,
+ "tag": "Generic"
+ },
{
"id": 66,
"tag": "Single compartment conductance based neuron model"
@@ -1989,32 +1989,32 @@
"summary": "This project contains an integrate and fire model of the cerebellar granule cell and a simple model of the mossy fibre to granule cell synapse. The cell model (IaF\\_GrC.nml) is the average (ie the one whose parameters have the average value) of the model population developed by Jason Rothman and published in Schwartz et, J Neurosci (2012). The synaptic model is based on the one used in that same paper, but it has been developed further to improve the fit to the experimental data and to ensure LEMS/NeuroMLv2 compatibility.\n",
"tags": [
{
- "id": 46,
- "tag": "Cerebellum"
+ "id": 7,
+ "tag": "OSBv1"
},
{
- "id": 75,
- "tag": "Granule cell"
+ "id": 9,
+ "tag": "Rodent"
},
{
- "id": 76,
- "tag": "Igor Pro"
+ "id": 10,
+ "tag": "neuroConstruct"
},
{
"id": 26,
"tag": "Integrate and fire neuron"
},
{
- "id": 7,
- "tag": "OSBv1"
+ "id": 46,
+ "tag": "Cerebellum"
},
{
- "id": 9,
- "tag": "Rodent"
+ "id": 75,
+ "tag": "Granule cell"
},
{
- "id": 10,
- "tag": "neuroConstruct"
+ "id": 76,
+ "tag": "Igor Pro"
}
],
"timestamp_created": "2026-07-29 10:18:36+00:00",
@@ -2208,18 +2208,10 @@
"repository_type": "github",
"summary": "\r\nA project illustrating the behaviour of the cerebellar granule cell model from: Maex, R and De Schutter, E. [Synchronization of Golgi and Granule Cell Firing in a Detailed Network Model of the Cerebellar Granule Cell Layer](http://www.ncbi.nlm.nih.gov/pubmed/9819260) J Neurophysiol, Nov 1998; 80: 2521 - 2537. \r\n\r\nBased on scripts obtained from: http://www.tnb.ua.ac.be/models/network.shtml.\r\n\r\nFor more details see the [[Wiki]].\r\n\r\n[](https://travis-ci.org/OpenSourceBrain/GranuleCell)\r\n",
"tags": [
- {
- "id": 46,
- "tag": "Cerebellum"
- },
{
"id": 4,
"tag": "GENESIS"
},
- {
- "id": 75,
- "tag": "Granule cell"
- },
{
"id": 7,
"tag": "OSBv1"
@@ -2228,13 +2220,21 @@
"id": 9,
"tag": "Rodent"
},
+ {
+ "id": 10,
+ "tag": "neuroConstruct"
+ },
+ {
+ "id": 46,
+ "tag": "Cerebellum"
+ },
{
"id": 66,
"tag": "Single compartment conductance based neuron model"
},
{
- "id": 10,
- "tag": "neuroConstruct"
+ "id": 75,
+ "tag": "Granule cell"
}
],
"timestamp_created": "2026-07-29 10:18:38+00:00",
@@ -2262,32 +2262,32 @@
"summary": "\nConversion to NeuroML of a model granule cell developed by Volker Steuber and Chiara Saviane (Silver lab).\n\nBased on a Granule cell model from Michiel Berends, Neural Comp 15, 2531-47 (2005) originally modified by Chiara Saviane and further modified by VS, July 2006.\n",
"tags": [
{
- "id": 46,
- "tag": "Cerebellum"
+ "id": 7,
+ "tag": "OSBv1"
},
{
- "id": 75,
- "tag": "Granule cell"
+ "id": 9,
+ "tag": "Rodent"
},
{
- "id": 16,
- "tag": "NEURON"
+ "id": 10,
+ "tag": "neuroConstruct"
},
{
- "id": 7,
- "tag": "OSBv1"
+ "id": 16,
+ "tag": "NEURON"
},
{
- "id": 9,
- "tag": "Rodent"
+ "id": 46,
+ "tag": "Cerebellum"
},
{
"id": 66,
"tag": "Single compartment conductance based neuron model"
},
{
- "id": 10,
- "tag": "neuroConstruct"
+ "id": 75,
+ "tag": "Granule cell"
}
],
"timestamp_created": "2026-07-29 10:18:38+00:00",
@@ -2397,32 +2397,32 @@
"summary": "",
"tags": [
{
- "id": 78,
- "tag": "Demo"
+ "id": 7,
+ "tag": "OSBv1"
},
{
- "id": 31,
- "tag": "Hippocampal formation"
+ "id": 9,
+ "tag": "Rodent"
},
{
- "id": 32,
- "tag": "Hippocampus"
+ "id": 10,
+ "tag": "neuroConstruct"
},
{
"id": 12,
"tag": "Network"
},
{
- "id": 7,
- "tag": "OSBv1"
+ "id": 31,
+ "tag": "Hippocampal formation"
},
{
- "id": 9,
- "tag": "Rodent"
+ "id": 32,
+ "tag": "Hippocampus"
},
{
- "id": 10,
- "tag": "neuroConstruct"
+ "id": 78,
+ "tag": "Demo"
}
],
"timestamp_created": "2026-07-29 10:18:39+00:00",
@@ -2645,14 +2645,6 @@
"id": 3,
"tag": "Detailed cell model"
},
- {
- "id": 88,
- "tag": "L2/3 pyramidal cell"
- },
- {
- "id": 16,
- "tag": "NEURON"
- },
{
"id": 5,
"tag": "Neocortex"
@@ -2668,6 +2660,14 @@
{
"id": 9,
"tag": "Rodent"
+ },
+ {
+ "id": 16,
+ "tag": "NEURON"
+ },
+ {
+ "id": 88,
+ "tag": "L2/3 pyramidal cell"
}
],
"timestamp_created": "2026-07-29 10:18:41+00:00",
@@ -3061,10 +3061,6 @@
"repository_type": "github",
"summary": "",
"tags": [
- {
- "id": 16,
- "tag": "NEURON"
- },
{
"id": 6,
"tag": "Network model"
@@ -3073,6 +3069,14 @@
"id": 7,
"tag": "OSBv1"
},
+ {
+ "id": 9,
+ "tag": "Rodent"
+ },
+ {
+ "id": 16,
+ "tag": "NEURON"
+ },
{
"id": 94,
"tag": "Olfaction"
@@ -3084,10 +3088,6 @@
{
"id": 96,
"tag": "Olfactory system"
- },
- {
- "id": 9,
- "tag": "Rodent"
}
],
"timestamp_created": "2026-07-29 10:18:43+00:00",
@@ -3400,33 +3400,33 @@
"repository_type": "github",
"summary": "\r\n\r\nThis project is being developed as part of the [OpenWorm](http://www.openworm.org) project. This is an attempt to convert the model of [Boyle & Cohen, 2008](http://www.sciencedirect.com/science/article/pii/S0303264708001408) into NeuroML format for use on NEURON and other simulators.\r\n\r\nSee [here](/projects/muscle_model/wiki) for more details.\r\n",
"tags": [
+ {
+ "id": 7,
+ "tag": "OSBv1"
+ },
{
"id": 19,
"tag": "C. elegans"
},
{
- "id": 104,
- "tag": "Cplusplus"
- },
- {
- "id": 105,
- "tag": "Muscle cell model"
+ "id": 21,
+ "tag": "OpenWorm"
},
{
"id": 59,
"tag": "Neuromuscular system"
},
{
- "id": 106,
- "tag": "Neuromusculature system"
+ "id": 104,
+ "tag": "Cplusplus"
},
{
- "id": 7,
- "tag": "OSBv1"
+ "id": 105,
+ "tag": "Muscle cell model"
},
{
- "id": 21,
- "tag": "OpenWorm"
+ "id": 106,
+ "tag": "Neuromusculature system"
}
],
"timestamp_created": "2026-07-29 10:18:45+00:00",
@@ -3567,18 +3567,6 @@
"repository_type": "github",
"summary": "\n\nProject to test scenarios for NeuroML & [Nengo](http://nengo.ca) interoperability\n",
"tags": [
- {
- "id": 25,
- "tag": "Generic"
- },
- {
- "id": 90,
- "tag": "Large scale network simulation"
- },
- {
- "id": 110,
- "tag": "Nengo"
- },
{
"id": 6,
"tag": "Network model"
@@ -3587,6 +3575,10 @@
"id": 7,
"tag": "OSBv1"
},
+ {
+ "id": 25,
+ "tag": "Generic"
+ },
{
"id": 53,
"tag": "Python tools for computational neuroscience"
@@ -3594,6 +3586,14 @@
{
"id": 73,
"tag": "Simulator showcase"
+ },
+ {
+ "id": 90,
+ "tag": "Large scale network simulation"
+ },
+ {
+ "id": 110,
+ "tag": "Nengo"
}
],
"timestamp_created": "2026-07-29 10:18:46+00:00",
@@ -4397,14 +4397,6 @@
"id": 7,
"tag": "OSBv1"
},
- {
- "id": 96,
- "tag": "Olfactory system"
- },
- {
- "id": 130,
- "tag": "Piriform cortex"
- },
{
"id": 8,
"tag": "Pyramidal cell"
@@ -4416,6 +4408,14 @@
{
"id": 10,
"tag": "neuroConstruct"
+ },
+ {
+ "id": 96,
+ "tag": "Olfactory system"
+ },
+ {
+ "id": 130,
+ "tag": "Piriform cortex"
}
],
"timestamp_created": "2026-07-29 10:18:52+00:00",
@@ -4560,10 +4560,6 @@
"repository_type": "github",
"summary": "\nAn initial implementation in NeuroML of the Purkinje Cell model from De Schutter, E. and Bower, J. M. (1994). Based on Arnd Roth el al\u2019s conversion of the original GENESIS code to NEURON. Note: conversion not fully complete.\n",
"tags": [
- {
- "id": 46,
- "tag": "Cerebellum"
- },
{
"id": 3,
"tag": "Detailed cell model"
@@ -4576,10 +4572,6 @@
"id": 7,
"tag": "OSBv1"
},
- {
- "id": 132,
- "tag": "Purkinje cell"
- },
{
"id": 9,
"tag": "Rodent"
@@ -4587,6 +4579,14 @@
{
"id": 10,
"tag": "neuroConstruct"
+ },
+ {
+ "id": 46,
+ "tag": "Cerebellum"
+ },
+ {
+ "id": 132,
+ "tag": "Purkinje cell"
}
],
"timestamp_created": "2026-07-29 10:18:53+00:00",
@@ -4613,6 +4613,18 @@
"repository_type": "github",
"summary": "Implementation of the pyloric network of the lobster stomatogastric ganglion system of Prinz, Marder, et al.\r\n\r\nWork in progress! For more details see the [[Wiki]].\r\n",
"tags": [
+ {
+ "id": 7,
+ "tag": "OSBv1"
+ },
+ {
+ "id": 10,
+ "tag": "neuroConstruct"
+ },
+ {
+ "id": 28,
+ "tag": "Point neuron network"
+ },
{
"id": 133,
"tag": "C"
@@ -4625,21 +4637,9 @@
"id": 135,
"tag": "Multiple cells"
},
- {
- "id": 7,
- "tag": "OSBv1"
- },
- {
- "id": 28,
- "tag": "Point neuron network"
- },
{
"id": 136,
"tag": "Stomatogastric ganglion"
- },
- {
- "id": 10,
- "tag": "neuroConstruct"
}
],
"timestamp_created": "2026-07-29 10:18:53+00:00",
@@ -4875,18 +4875,10 @@
"repository_type": "github",
"summary": "[Striatal spiny projection neuron](http://neurolex.org/wiki/Category:Neostriatum_direct_pathway_spiny_neuron) model being developed by Avrama Blackwell. A version of this model in \u201cpure\u201d NeuroML v2.0 is being developed here.\n\nFor more information, see the [[Wiki]]\n",
"tags": [
- {
- "id": 116,
- "tag": "Basal ganglia"
- },
{
"id": 4,
"tag": "GENESIS"
},
- {
- "id": 14,
- "tag": "Goldman-Hodgkin-Katz current"
- },
{
"id": 7,
"tag": "OSBv1"
@@ -4895,10 +4887,18 @@
"id": 9,
"tag": "Rodent"
},
+ {
+ "id": 14,
+ "tag": "Goldman-Hodgkin-Katz current"
+ },
{
"id": 66,
"tag": "Single compartment conductance based neuron model"
},
+ {
+ "id": 116,
+ "tag": "Basal ganglia"
+ },
{
"id": 139,
"tag": "Striatal Spiny Projection Neuron"
@@ -5484,8 +5484,16 @@
"summary": "",
"tags": [
{
- "id": 150,
- "tag": "?"
+ "id": 7,
+ "tag": "OSBv1"
+ },
+ {
+ "id": 9,
+ "tag": "Rodent"
+ },
+ {
+ "id": 12,
+ "tag": "Network"
},
{
"id": 31,
@@ -5500,16 +5508,8 @@
"tag": "Interneuron"
},
{
- "id": 12,
- "tag": "Network"
- },
- {
- "id": 7,
- "tag": "OSBv1"
- },
- {
- "id": 9,
- "tag": "Rodent"
+ "id": 150,
+ "tag": "?"
}
],
"timestamp_created": "2026-07-29 10:18:59+00:00",
@@ -5666,6 +5666,210 @@
"username": "osbadmin"
},
"user_id": "897f31bd-b8a4-49bb-97e1-309a12ee6dac"
+ },
+ "120": {
+ "auto_sync": true,
+ "content_types": "modeling",
+ "content_types_list": [
+ "modeling"
+ ],
+ "default_context": "4",
+ "id": 120,
+ "name": "Edelstein1996 - EPSP ACh event",
+ "repository_type": "biomodels",
+ "summary": "
Edelstein1996 - EPSP ACh event
Model of a nicotinic Excitatory Post-Synaptic Potential in a Torpedo electric organ. Acetylcholine is not represented explicitely, but by an event that changes the constants of transition from unliganded to liganded.\u00a0
This model has initially been encoded using StochSim.
Edelstein SJ, Schaad O, Henry E, Bertrand D, Changeux JP.
Biol Cybern 1996 Nov; 75(5): 361-379
Abstract:
Nicotinic acetylcholine receptors are transmembrane oligomeric proteins that mediate interconversions between open and closed channel states under the control of neurotransmitters. Fast in vitro chemical kinetics and in vivo electrophysiological recordings are consistent with the following multi-step scheme. Upon binding of agonists, receptor molecules in the closed but activatable resting state (the Basal state, B) undergo rapid transitions to states of higher affinities with either open channels (the Active state, A) or closed channels (the initial Inactivatable and fully Desensitized states, I and D). In order to represent the functional properties of such receptors, we have developed a kinetic model that links conformational interconversion rates to agonist binding and extends the general principles of the Monod-Wyman-Changeux model of allosteric transitions. The crucial assumption is that the linkage is controlled by the position of the interconversion transition states on a hypothetical linear reaction coordinate. Application of the model to the peripheral nicotine acetylcholine receptor (nAChR) accounts for the main properties of ligand-gating, including single-channel events, and several new relationships are predicted. Kinetic simulations reveal errors inherent in using the dose-response analysis, but justify its application under defined conditions. The model predicts that (in order to overcome the intrinsic stability of the B state and to produce the appropriate cooperativity) channel activation is driven by an A state with a Kd in the 50 nM range, hence some 140-fold stronger than the apparent affinity of the open state deduced previously. According to the model, recovery from the desensitized states may occur via rapid transit through the A state with minimal channel opening, thus without necessarily undergoing a distinct recovery pathway, as assumed in the standard 'cycle' model. Transitions to the desensitized states by low concentration 'pre-pulses' are predicted to occur without significant channel opening, but equilibrium values of IC50 can be obtained only with long pre-pulse times. Predictions are also made concerning allosteric effectors and their possible role in coincidence detection. In terms of future developments, the analysis presented here provides a physical basis for constructing more biologically realistic models of synaptic modulation that may be applied to artificial neural networks.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
Edelstein SJ, Schaad O, Henry E, Bertrand D, Changeux JP.
Biol. Cybern. 1996 Nov; 75(5):361-79
Abstract:
Nicotinic acetylcholine receptors are transmembrane oligomeric proteins that mediate interconversions between open and closed channel states under the control of neurotransmitters. Fast in vitro chemical kinetics and in vivo electrophysiological recordings are consistent with the following multi-step scheme. Upon binding of agonists, receptor molecules in the closed but activatable resting state (the Basal state, B) undergo rapid transitions to states of higher affinities with either open channels (the Active state, A) or closed channels (the initial Inactivatable and fully Desensitized states, I and D). In order to represent the functional properties of such receptors, we have developed a kinetic model that links conformational interconversion rates to agonist binding and extends the general principles of the Monod-Wyman-Changeux model of allosteric transitions. The crucial assumption is that the linkage is controlled by the position of the interconversion transition states on a hypothetical linear reaction coordinate. Application of the model to the peripheral nicotine acetylcholine receptor (nAChR) accounts for the main properties of ligand-gating, including single-channel events, and several new relationships are predicted. Kinetic simulations reveal errors inherent in using the dose-response analysis, but justify its application under defined conditions. The model predicts that (in order to overcome the intrinsic stability of the B state and to produce the appropriate cooperativity) channel activation is driven by an A state with a Kd in the 50 nM range, hence some 140-fold stronger than the apparent affinity of the open state deduced previously. According to the model, recovery from the desensitized states may occur via rapid transit through the A state with minimal channel opening, thus without necessarily undergoing a distinct recovery pathway, as assumed in the standard 'cycle' model. Transitions to the desensitized states by low concentration 'pre-pulses' are predicted to occur without significant channel opening, but equilibrium values of IC50 can be obtained only with long pre-pulse times. Predictions are also made concerning allosteric effectors and their possible role in coincidence detection. In terms of future developments, the analysis presented here provides a physical basis for constructing more biologically realistic models of synaptic modulation that may be applied to artificial neural networks.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
Proc. Natl. Acad. Sci. U.S.A. 1991; 88(20):9107-11
Abstract:
A minimal model for the mitotic oscillator is presented. The model, built on recent experimental advances, is based on the cascade of post-translational modification that modulates the activity of cdc2 kinase during the cell cycle. The model pertains to the situation encountered in early amphibian embryos, where the accumulation of cyclin suffices to trigger the onset of mitosis. In the first cycle of the bicyclic cascade model, cyclin promotes the activation of cdc2 kinase through reversible dephosphorylation, and in the second cycle, cdc2 kinase activates a cyclin protease by reversible phosphorylation. That cyclin activates cdc2 kinase while the kinase triggers the degradation of cyclin has suggested that oscillations may originate from such a negative feedback loop [F\u00e9lix, M. A., Labb\u00e9, J. C., Dor\u00e9e, M., Hunt, T. & Karsenti, E. (1990) Nature (London) 346, 379-382]. This conjecture is corroborated by the model, which indicates that sustained oscillations of the limit cycle type can arise in the cascade, provided that a threshold exists in the activation of cdc2 kinase by cyclin and in the activation of cyclin proteolysis by cdc2 kinase. The analysis shows how miototic oscillations may readily arise from time lags associated with these thresholds and from the delayed negative feedback provided by cdc2-induced cyclin degradation. A mechanism for the origin of the thresholds is proposed in terms of the phenomenon of zero-order ultrasensitivity previously described for biochemical systems regulated by covalent modification.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
This model represents the inactive forms of CDC-2 Kinase and Cyclin Protease as separate species, unlike the ODEs in the published paper, in which the equations for the inactive forms are substituted into the equations for the active forms using a mass conservation rule M+MI=1,X+XI=1. Mass is still conserved in this model through the explicit reactions M<->MI and X<->XI. The terms in the kinetic laws are identical to the corresponding terms in the kinetic laws in the published paper.
This model has been generated by MathSBML 2.4.6 (14-January-2005) 14-January-2005 18:37:35.503857.
Proc. Natl. Acad. Sci. USA 1991 Oct; 88(20):9107-11
Abstract:
A minimal model for the mitotic oscillator is presented. The model, built on recent experimental advances, is based on the cascade of post-translational modification that modulates the activity of cdc2 kinase during the cell cycle. The model pertains to the situation encountered in early amphibian embryos, where the accumulation of cyclin suffices to trigger the onset of mitosis. In the first cycle ofthe bicyclic cascade model, cyclin promotes the activation of cdc2 kinase through reversible dephosphorylation, and in the second cycle, cdc2 kinase activates a cyclin protease by reversible phosphorylation. That cyclin activates cdc2 kinase while the kinase triggers the degradation of cyclin has suggested that oscillations may originate from such a negative feedback loop [F\u00e9lix, M. A., Labb\u00e9, J. C., Dor\u00e9e, M., Hunt, T. & Karsenti, E. (1990) Nature (London) 346, 379-382]. Thisconjecture is corroborated by the model, which indicates that sustained oscillations of the limit cycle type can arise in the cascade, provided that a threshold exists in the activation of cdc2 kinase by cyclin and in the activation of cyclinproteolysis by cdc2 kinase. The analysis shows how miototic oscillations may readily arise from time lags associated with these thresholds and from the delayed negative feedback provided by cdc2-induced cyclin degradation. A mechanism for theorigin of the thresholds is proposed in terms of the phenomenon of zero-order ultrasensitivity previously described for biochemical systems regulated by covalent modification.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
Model of a nicotinic Excitatory Post-Synaptic Potential in a Torpedo electric organ. Acetylcholine is not represented explicitely, but by an event that changes the constants of transition from unliganded to liganded.\u00a0
This model has initially been encoded using StochSim.
Edelstein SJ, Schaad O, Henry E, Bertrand D, Changeux JP.
Biol Cybern 1996 Nov; 75(5): 361-379
Abstract:
Nicotinic acetylcholine receptors are transmembrane oligomeric proteins that mediate interconversions between open and closed channel states under the control of neurotransmitters. Fast in vitro chemical kinetics and in vivo electrophysiological recordings are consistent with the following multi-step scheme. Upon binding of agonists, receptor molecules in the closed but activatable resting state (the Basal state, B) undergo rapid transitions to states of higher affinities with either open channels (the Active state, A) or closed channels (the initial Inactivatable and fully Desensitized states, I and D). In order to represent the functional properties of such receptors, we have developed a kinetic model that links conformational interconversion rates to agonist binding and extends the general principles of the Monod-Wyman-Changeux model of allosteric transitions. The crucial assumption is that the linkage is controlled by the position of the interconversion transition states on a hypothetical linear reaction coordinate. Application of the model to the peripheral nicotine acetylcholine receptor (nAChR) accounts for the main properties of ligand-gating, including single-channel events, and several new relationships are predicted. Kinetic simulations reveal errors inherent in using the dose-response analysis, but justify its application under defined conditions. The model predicts that (in order to overcome the intrinsic stability of the B state and to produce the appropriate cooperativity) channel activation is driven by an A state with a Kd in the 50 nM range, hence some 140-fold stronger than the apparent affinity of the open state deduced previously. According to the model, recovery from the desensitized states may occur via rapid transit through the A state with minimal channel opening, thus without necessarily undergoing a distinct recovery pathway, as assumed in the standard 'cycle' model. Transitions to the desensitized states by low concentration 'pre-pulses' are predicted to occur without significant channel opening, but equilibrium values of IC50 can be obtained only with long pre-pulse times. Predictions are also made concerning allosteric effectors and their possible role in coincidence detection. In terms of future developments, the analysis presented here provides a physical basis for constructing more biologically realistic models of synaptic modulation that may be applied to artificial neural networks.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
Edelstein SJ, Schaad O, Henry E, Bertrand D, Changeux JP.
Biol. Cybern. 1996 Nov; 75(5):361-79
Abstract:
Nicotinic acetylcholine receptors are transmembrane oligomeric proteins that mediate interconversions between open and closed channel states under the control of neurotransmitters. Fast in vitro chemical kinetics and in vivo electrophysiological recordings are consistent with the following multi-step scheme. Upon binding of agonists, receptor molecules in the closed but activatable resting state (the Basal state, B) undergo rapid transitions to states of higher affinities with either open channels (the Active state, A) or closed channels (the initial Inactivatable and fully Desensitized states, I and D). In order to represent the functional properties of such receptors, we have developed a kinetic model that links conformational interconversion rates to agonist binding and extends the general principles of the Monod-Wyman-Changeux model of allosteric transitions. The crucial assumption is that the linkage is controlled by the position of the interconversion transition states on a hypothetical linear reaction coordinate. Application of the model to the peripheral nicotine acetylcholine receptor (nAChR) accounts for the main properties of ligand-gating, including single-channel events, and several new relationships are predicted. Kinetic simulations reveal errors inherent in using the dose-response analysis, but justify its application under defined conditions. The model predicts that (in order to overcome the intrinsic stability of the B state and to produce the appropriate cooperativity) channel activation is driven by an A state with a Kd in the 50 nM range, hence some 140-fold stronger than the apparent affinity of the open state deduced previously. According to the model, recovery from the desensitized states may occur via rapid transit through the A state with minimal channel opening, thus without necessarily undergoing a distinct recovery pathway, as assumed in the standard 'cycle' model. Transitions to the desensitized states by low concentration 'pre-pulses' are predicted to occur without significant channel opening, but equilibrium values of IC50 can be obtained only with long pre-pulse times. Predictions are also made concerning allosteric effectors and their possible role in coincidence detection. In terms of future developments, the analysis presented here provides a physical basis for constructing more biologically realistic models of synaptic modulation that may be applied to artificial neural networks.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
Proc. Natl. Acad. Sci. U.S.A. 1991; 88(16); 7328-32
Abstract:
The proteins cdc2 and cyclin form a heterodimer (maturation promoting factor) that controls the major events of the cell cycle. A mathematical model for the interactions of cdc2 and cyclin is constructed. Simulation and analysis of the model show that the control system can operate in three modes: as a steady state with high maturation promoting factor activity, as a spontaneous oscillator, or as an excitable switch. We associate the steady state with metaphase arrest in unfertilized eggs, the spontaneous oscillations with rapid division cycles in early embryos, and the excitable switch with growth-controlled division cycles typical of nonembryonic cells.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
Proc. Natl. Acad. Sci. U.S.A. 1991; 88(16); 7328-32
Abstract:
The proteins cdc2 and cyclin form a heterodimer (maturation promoting factor) that controls the major events of the cell cycle. A mathematical model for the interactions of cdc2 and cyclin is constructed. Simulation and analysis of the model show that the control system can operate in three modes: as a steady state with high maturation promoting factor activity, as a spontaneous oscillator, or as an excitable switch. We associate the steady state with metaphase arrest in unfertilized eggs, the spontaneous oscillations with rapid division cycles in early embryos, and the excitable switch with growth-controlled division cycles typical of nonembryonic cells.
This is a two variable reduction of the larger 6-variable model published in the same paper. The equations are:
u'= k4(v-u)(alpha+u^2)-k6*u v'=kappa-k6*u z= v-u with kappa = k1[aa]/[CT]
In the present implementation, an additional variable z is introduced with z = v-u is made, so that the different variables be interpreted as follows:
u=[activeMPF]/[CT] v=([cyclin]+[preMPF]+[activeMPF])/[CT] z=([ cyclin]+[preMPF])/[CT] with [CT]=[CDC2]+{CDC2P]+[preMPF]+[aMPF].
The reactions included are only to show the flows between z and u, and do not influence the species, as they all are set to boundaryCondition=True , meaning, that they are only determined by the rate rules (explicit differential equations) and assignment rules.
If you set boundaryCondition=False and remove the rate rules for v, u and the the assignment rule for z, you get the more symmetrical, but equivalent, version from the Cellerator repository:
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
A central event in the eukaryotic cell cycle is the decision to commence DNA replication (S phase). Strict controls normally operate to prevent repeated rounds of DNA replication without intervening mitoses (\"endoreplication\") or initiation of mitosis before DNA is fully replicated (\"mitotic catastrophe\"). Some of the genetic interactions involved in these controls have recently been identified in yeast. From this evidence we propose a molecular mechanism of \"Start\" control in Schizosaccharomyces pombe. Using established principles of biochemical kinetics, we compare the properties of this model in detail with the observed behavior of various mutant strains of fission yeast: wee1(-) (size control at Start), cdc13Delta and rum1(OP) (endoreplication), and wee1(-) rum1Delta (rapid division cycles of diminishing cell size). We discuss essential features of the mechanism that are responsible for characteristic properties of Start control in fission yeast, to expose our proposal to crucial experimental tests.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
Proc. Natl. Acad. Sci. U.S.A. 1998 Nov; 95(24): 14190-14195
Abstract:
We demonstrate, by using mathematical modeling of cell division cycle (CDC) dynamics, a potential mechanism for precisely controlling the frequency of cell division and regulating the size of a dividing cell. Control of the cell cycle is achieved by artificially expressing a protein that reversibly binds and inactivates any one of the CDC proteins. In the simplest case, such as the checkpoint-free situation encountered in early amphibian embryos, the frequency of CDC oscillations can be increased or decreased by regulating the rate of synthesis, the binding rate, or the equilibrium constant of the binding protein. In a more complex model of cell division, where size-control checkpoints are included, we show that the same reversible binding reaction can alter the mean cell mass in a continuously dividing cell. Because this control scheme is general and requires only the expression of a single protein, it provides a practical means for tuning the characteristics of the cell cycle in vivo.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
The temporal sequence of kinase activation, from MAPKKK (activated RAF) to the final effector MAPK (activated ERK), is described here. It is observed from the model that there is an increase in sensitivity along the levels of the cascade, where the activity of MAPK reaches its maximal before MAPKKK.
Proc. Natl. Acad. Sci. U.S.A. 1996:93(19):10078-83
Abstract:
The mitogen-activated protein kinase (MAPK) cascade is a highly conserved series of three protein kinases implicated in diverse biological processes. Here we demonstrate that the cascade arrangement has unexpected consequences for the dynamics of MAPK signaling. We solved the rate equations for the cascade numerically and found that MAPK is predicted to behave like a highly cooperative enzyme, even though it was not assumed that any of the enzymes in the cascade were regulated cooperatively. Measurements of MAPK activation in Xenopus oocyte extracts confirmed this prediction. The stimulus/response curve of the MAPK was found to be as steep as that of a cooperative enzyme with a Hill coefficient of 4-5, well in excess of that of the classical allosteric protein hemoglobin. The shape of the MAPK stimulus/ response curve may make the cascade particularly appropriate for mediating processes like mitogenesis, cell fate induction, and oocyte maturation, where a cell switches from one discrete state to another.
The species K_PP_norm, KKK_P_norm and KK_PP_norm are the relative concentrations of the active MAPK, MAPKK and MAPKKK, that is the double, or single resp. phophorylated forms divided by the total concentrations of each kinase. For MAPK additionally the also active MAPK divided by the maximal concentration of active MAPK is given by rel_K_PP_max. The parameter K_PP_norm_max, the maximal ratio of active MapK, has to be calculated for each change of parameters.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
Functional organization of signal transduction into protein phosphorylation cascades, such as the mitogen-activated protein kinase (MAPK) cascades, greatly enhances the sensitivity of cellular targets to external stimuli. The sensitivity increases multiplicatively with the number of cascade levels, so that a tiny change in a stimulus results in a large change in the response, the phenomenon referred to as ultrasensitivity. In a variety of cell types, the MAPK cascades are imbedded in long feedback loops, positive or negative, depending on whether the terminal kinase stimulates or inhibits the activation of the initial level. Here we demonstrate that a negative feedback loop combined with intrinsic ultrasensitivity of the MAPK cascade can bring about sustained oscillations in MAPK phosphorylation. Based on recent kinetic data on the MAPK cascades, we predict that the period of oscillations can range from minutes to hours. The phosphorylation level can vary between the base level and almost 100% of the total protein. The oscillations of the phosphorylation cascades and slow protein diffusion in the cytoplasm can lead to intracellular waves of phospho-proteins.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
This model describes a basic 3-\t\t\t\t\t\t\tstage Mitogen Activated Protein Kinase (MAPK)\t\t\t\t\t\t\t cascade in solution. This cascade is typically expressed as RAF=\t\t\t\t\t\t\t=>MEK==>MAPK (alternative forms are K3==>K2==>\t\t\t\t\t\t\tK1 and KKK==>KK==>K)\t\t\t\t\t\t\t. The input signal is RAFK (RAF Kinase)\t\t\t\t\t\t\t and the output signal is MAPKpp (\t\t\t\t\t\t\tdoubly phosphorylated form of MAPK)\t\t\t\t\t\t\t. RAFK phosphorylates RAF once to RAFp. RAFp,\t\t\t\t\t\t\t the phosphorylated form of RAF induces two phoshporylations of MEK,\t\t\t\t\t\t\tto MEKp and MEKpp. MEKpp,\t\t\t\t\t\t\t the doubly phosphorylated form of MEK,\t\t\t\t\t\t\t induces two phosphorylations of MAPK to MAPKp and MAPKpp.
Generated by Cellerator Version 1.4.3 (6-March-2004) using Mathematica 5.0 \t\t\t\tfor Mac OS X (November 19, 2003), March 6, 2004 12:18:07, using (PowerMac,\t\t\t\tPowerPC,Mac OS X,MacOSX,Darwin)
This model describes the deterministic version of the repressilator system.
The authors of this model (see reference) use three transcriptional repressor systems that are not part of any natural biological clock to build an oscillating network that they called the repressilator. The model system was induced in Escherichia coli.
In this system, LacI (variable X is the mRNA, variable PX is the protein) inhibits the tetracycline-resistance transposon tetR (Y, PY describe mRNA and protein). Protein tetR inhibits the gene Cl from phage Lambda (Z, PZ: mRNA, protein),and protein Cl inhibits lacI expression. With the appropriate parameter values this system oscillates.
Networks of interacting biomolecules carry out many essential functions in living cells, but the 'design principles' underlying the functioning of such intracellular networks remain poorly understood, despite intensive efforts including quantitative analysis of relatively simple systems. Here we present a complementary approach to this problem: the design and construction of a synthetic network to implement a particular function. We used three transcriptional repressor systems that are not part of any natural biological clock to build an oscillating network, termed the repressilator, in Escherichia coli. The network periodically induces the synthesis of green fluorescent protein as a readout of its state in individual cells. The resulting oscillations, with typical periods of hours, are slower than the cell-division cycle, so the state of the oscillator has to be transmitted from generation to generation. This artificial clock displays noisy behaviour, possibly because of stochastic fluctuations of its components. Such 'rational network design may lead both to the engineering of new cellular behaviours and to an improved understanding of naturally occurring networks.
The model is based upon the equations in Box 1 of the paper; however, these equations as printed are dimensionless, and the correct dimensions have been returned to the equations, and the parameters set to reproduce Figure 1C (left).
The original model was generated by B.E. Shapiro using Cellerator version 1.0 update 2.1127 using Mathematica 4.2 for Mac OS X (June 4, 2002), November 27, 2002 12:15:32, using (PowerMac,PowerPC, Mac OS X,MacOSX,Darwin).
Nicolas Le Novere provided a corrected version generated by SBMLeditor on Sun Aug 20 00:44:05 BST 2006. This removed the EmptySet species. Ran fine on COPASI 4.0 build 18.
Bruce Shapiro revised the model with SBMLeditor on 23 October 2006 20:39 PST. This defines default units and correct reactions. The original Cellerator reactions while being mathematically correct did not accurately reflect the intent of the authors. The original notes were mostly removed because they were mostly incorrect in the revised version. Tested with MathSBML 2.6.0.
Nicolas Le Novere changed the volume to 1 cubic micrometre, to allow for stochastic simulation.
Changed by Lukas Endler to use the average livetime of mRNA instead of its halflife and a corrected value of alpha and alpha0.
Moreover, the equations used in this model were clarified, cf. below.
The equations given in box 1 of the original publication are rescaled in three respects (lowercase letters denote the rescaled, uppercase letters the unscaled number of molecules per cell):
the time is rescaled to the average mRNA lifetime, t_ave: \u03c4 = t/t_ave
the mRNA concentration is rescaled to the translation efficiency eff: m = M/eff
the protein concentration is rescaled to Km: p = P/Km
\u03b1 in the equations should be in units of rescaled proteins per promotor and cell, and \u03b2 is the ratio of the protein to the mRNA decay rates or the ratio of the mRNA to the protein halflife.
In this version of the model \u03b1 and \u03b2 are calculated correspondingly to the article, while p and m where just replaced by P/Km resp. M/eff and all equations multiplied by 1/t_ave . Also, to make the equations easier to read, commonly used variables derived from the parameters given in the article by simple rules were introduced.
The parameters given in the article were:
promotor strength (repressed) ( tps_repr ):
5*10 -4
transcripts/(promotor*s)
promotor strength (full) ( tps_active ):
0.5
transcripts/(promotor*s)
mRNA half life, \u03c4 1/2,mRNA :
2
min
protein half life, \u03c4 1/2,prot :
10
min
K M :
40
monomers/cell
Hill coefficient n:
2
From these the following constants can be derived:
average mRNA lifetime ( t_ave ):
\u03c4 1/2,mRNA /ln(2)
= 2.89 min
mRNA decay rate ( kd_mRNA ):
ln(2)/ \u03c4 1/2,mRNA
= 0.347 min -1
protein decay rate ( kd_prot ):
ln(2)/ \u03c4 1/2,prot
transcription rate ( a_tr ):
tps_active*60
= 29.97 transcripts/min
transcription rate (repressed) ( a0_tr ):
tps_repr*60
= 0.03 transcripts/min
translation rate ( k_tl ):
eff*kd_mRNA
= 6.93 proteins/(mRNA*min)
\u03b1 :
a_tr*eff*\u03c4 1/2,prot /(ln(2)*K M )
= 216.4 proteins/(promotor*cell*Km)
\u03b1 0 :
a0_tr*eff*\u03c4 1/2,prot /(ln(2)*K M )
= 0.2164 proteins/(promotor*cell*Km)
\u03b2 :
k_dp/k_dm
= 0.2
Annotation by the Kinetic Simulation Algorithm Ontology (KiSAO):
To reproduce the simulations run published by the authors, the model has to be simulated with any of two different approaches. First, one could use a deterministic method ( KISAO_0000035 ) with continuous variables ( KISAO_0000018 ). One sample algorithm to use is the CVODE solver ( KISAO_0000019 ). Second, one could simulate the system using Gillespie's direct method ( KISAO_0000029 ), which is a stochastic method ( KISAO_0000036 ) supporting adaptive timesteps ( KISAO_0000041 ) and using discrete variables ( KISAO_0000016 ).
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
This a model from the article: Applications of metabolic modelling to plant metabolism. \t Poolman MG ,Assmus HE, Fell DA J. Exp. Bot.[2004 May; Volume: 55 (Issue: 400 )]: 1177-86 15073223, Abstract: In this paper some of the general concepts underpinning the computer modelling of metabolic systems are introduced. The difference between kinetic and structural modelling is emphasized, and the more important techniques from both, along with the physiological implications, are described. These approaches are then illustrated by descriptions of other work, in which they have been applied to models of the Calvin cycle, sucrose metabolism in sugar cane, and starch metabolism in potatoes.
This model describes the non oxidative Calvin cycle as depicted in Poolman et al; J Exp Bot (2004) 55:1177-1186, fig 2. Reaction E20: E4P + F6P \u2194 S7P + GAP, is depicted in the figure, but not included in the model. The light reaction: ADP + P i \u2192 ATP, is included in the model, but only mentioned in the figure caption. The parameters and initial concentrations are the same as in Poolman, 1999, Computer Modelling Applied to the Calvin Cycle, PhD Thesis, Oxford Brookes University, Appendix A (available at at http://mudshark.brookes.ac.uk/index.php/Publications/Theses/Mark)
\u00a9 Mark Poolman (mgpoolman@brookes.ac.uk) 1995-2002 Based on a description by Pettersson 1988, Eur. J. Biochem. 175, 661-672 Differences are: 1 - Reactions assumed by Pettersson to be in equilibrium have fast mass action kinetics. 2 - Introduction of the parameter PGAxpMult to modulate PGA export through TPT. 3 - Introduction of Starch phosphorylase reaction. This file may be freely copied or translated into other formats provided: 1 - This notice is reproduced in its entirety 2 - Published material making use of (information gained from) this model cites at least: (a) Poolman, 1999, Computer Modelling Applied to the Calvin Cycle, PhD Thesis, Oxford Brookes University (b) Poolman, Fell, and Thomas. 2000, Modelling Photosynthesis and its control, J. Exp. Bot. 51, 319-328 or (c) Poolman et al. 2001, Computer modelling and experimental evidence for two steady states in the photosynthetic Calvin cycle. Eur. J. Biochem. 268, 2810-2816 Further related information may be found at http://mudshark.brookes.ac.uk.
Levchenko, A., Bruck, J., Sternberg, P.W. (2000)\t\t\t\t\t\t\t.Scaffold proteins may biphasically affect the levels of mitogen-activated protein kinase signaling and reduce its threshold properties. Proc. Natl. Acad. Sci. USA 97(11):5818-5823.\t\t\t\t\t\t\t\t\t\t\t\t\thttp://www.pnas.org/cgi/content/abstract/97/11/5818\t\t\t\t\t\t
\t\t\t\t\t
\t\t\t\t\t\t\t
\t\t\t\t\t\t
\t\t\t\t\t\t\t\t\t
\t\t\t\t\t\t
Description
\t\t\t\t\t
\t\t\t\t\t\t\t\t\t\t\t\t\t
\t\t\t\t\t\t
This model describes a basic 3-stage Mitogen Activated Protein Kinase (MAPK). Kinases in solution are written as K[3,J], K[2,J], K[1,J] for MAPKKK, MAPKK, and MAPK, respectively, J indicates the phosphorylation level, J=0,1 for K3 and J=0,1,2 for K2 and K1. Scaffolds have three slots, for MAPK, MAPKK, and MAPKKK, respectively. Bound and free scaffold are denoted as S[i,j,k], where i, j, and k indicate the binding of K[1,i], K[2,j] and K[3,k] in their respective slots. Here i,j=-1,0,1,or,2 and k=-1,0,or,1. A value of -1 means the slot is empty, 0 means the unphorphorylated kinase is bound, 1 means the singly phosphorylated kinase is bound, and 2 means the doubly phosphorylated kinase is bound. Thus S[1,-1,2] is a scaffold with K[3,1] bound in the first slot and K[1,2] in the third slot, while the second slot is empty.Note: Indices X[I,J,K] are translated into the unindexed variable X_I_J_K and so forth in the SBML. Negative indices are translated as mI, etc, thus S[1,-1,2] becomes S_1_m1_2.
Generated by Cellerator Version 1.0 update 2.1203 using Mathematica 4.2 for \t\t\t\tMac OS X (June 4, 2002), December 4, 2002 15:06:10, using (PowerMac,PowerPC,Mac \t\t\t\tOS X,MacOSX,Darwin)
Experimental and clinical data on purine metabolism are collated and analyzed with three mathematical models. The first model is the result of an attempt to construct a traditional kinetic model based on Michaelis-Menten rate laws. This attempt is only partially successful, since kinetic information, while extensive, is not complete, and since qualitative information is difficult to incorporate into this type of model. The data gaps necessitate the complementation of the Michaelis-Menten model with other functional forms that can incorporate different types of data. The most convenient and established representations for this purpose are rate laws formulated as power-law functions, and these are used to construct a Complemented Michaelis-Menten (CMM) model. The other two models are pure power-law-representations, one in the form of a Generalized Mass Action (GMA) system, and the other one in the form of an S-system. The first part of the paper contains a compendium of experimental data necessary for any model of purine metabolism. This is followed by the formulation of the three models and a comparative analysis. For physiological and moderately pathological perturbations in metabolites or enzymes, the results of the three models are very similar and consistent with clinical findings. This is an encouraging result since the three models have different structures and data requirements and are based on different mathematical assumptions. Significant enzyme deficiencies are not so well modeled by the S-system model. The CMM model captures the dynamics better, but judging by comparisons with clinical observations, the best model in this case is the GMA model. The model results are discussed in some detail, along with advantages and disadvantages of each modeling strategy.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
In summary, you are entitled to use this encoded model in absolutely any manner you deem suitable, verbatim, or with modification, alone or embedded it in a larger context, redistribute it, commercially or not, in a restricted way or not.
This a model from the article: Metabolic engineering of lactic acid bacteria, the combined approach: kinetic modelling, metabolic control and experimental analysis. Hoefnagel MH, Starrenburg MJ, Martens DE, Hugenholtz J, Kleerebezem M, Van Swam II, Bongers R, Westerhoff HV, Snoep JL Microbiology2002 Apr; 148(4):1003-13 11932446, Abstract: Everyone who has ever tried to radically change metabolic fluxes knows that it is often harder to determine which enzymes have to be modified than it is to actually implement these changes. In the more traditional genetic engineering approaches \u2019bottle-necks\u2019 are pinpointed using qualitative, intuitive approaches, but the alleviation of suspected \u2019rate-limiting\u2019 steps has not often been successful. Here the authors demonstrate that a model of pyruvate distribution in Lactococcus lactis based on enzyme kinetics in combination with metabolic control analysis clearly indicates the key control points in the flux to acetoin and diacetyl, important flavour compounds. The model presented here (available at http://jjj.biochem.sun.ac.za/wcfs.html) showed that the enzymes with the greatest effect on this flux resided outside the acetolactate synthase branch itself. Experiments confirmed the predictions of the model, i.e. knocking out lactate dehydrogenase and overexpressing NADH oxidase increased the flux through the acetolactate synthase branch from 0 to 75% of measured product formation rates.
The paper does not have any figure to be put as a curation figure in the BioModels database. The model does reproduce the fluxes and control-coefficients given in Figure 2 and Table 4. To reproduce the results, the model was changed from the description in the article according to the model on JWS: the parameter Kmpyr was changed to 2.5 from 25. The equillibrium constant for PTA reaction (R4) was changed from 0.0281 to 0.0065. The Km for oxygen in the NOX reaction (R13) was changed from 0.01 to 0.2. Slight deviations between the values in the article and the model results may stem from different algorithms used for finding the steady state.
A mathematical description of polyglutamated folate kinetics for human breast carcinoma cells (MCF-7) has been formulated based upon experimental folate, methotrexate (MTX), purine, and pyrimidine pool sizes as well as reaction rate parameters obtained from intact MCF-7 cells and their enzyme isolates. The schema accounts for the interconversion of highly polyglutamated tetrahydrofolate, 5-methyl-FH4, 5-10-CH2FH4, dihydrofolate (FH2), 10-formyl-FH4 (FFH4), and 10-formyl-FH2 (FFH2), as well as formation and transport of the MTX polyglutamates. Inhibition mechanisms have been chosen to reproduce all observed non-, un-, and pure competition inhibition patterns. Steady state folate concentrations and thymidylate and purine synthesis rates in drug-free intact cells were used to determine normal folate Vmax values. The resulting average-cell folate model, examined for its ability to predict folate pool behavior following exposure to 1 microM MTX over 21 h, agreed well with the experiment, including a relative preservation of the FFH4 and CH2FH4 pools. The results depend strongly on thymidylate synthase (TS) reaction mechanism, especially the assumption that MTX di- and triglutamates inhibit TS synthesis as greatly in the intact cell as they do with purified enzyme. The effects of cell cycle dependence of TS and dihydrofolate reductase activities were also examined by introducing G- to S-phase activity ratios of these enzymes into the model. For activity ratios down to at least 5%, cell population averaged folate pools were only slightly affected, while CH2FH4 pools in S-phase cells were reduced to as little as 10% of control values. Significantly, these folate pool dynamics were indicated to arise from both direct inhibition by MTX polyglutamates as well as inhibition by elevated levels of polyglutamated FH2 and FFH2.
Note: two flow BCs were converted into two downstream concentration BCs, thus removing the GAR and dUMP state variables. This dropped the number of ODEs from 21 to 19.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
Computational model that offers an integrated quantitative, dynamic, and topological representation of intracellular signal networks, based on known components of epidermal growth factor (EGF) receptor signal pathways.
\t
\t
\t
The initial model was constructed by Ken Lau from the MATLAB source code.
Schoeberl B, Eichler-Jonsson C, Gilles ED, M\u00fcller G
\t
Nat. Biotechnol. 2002 Apr; 20(4): 370-375
\t
Abstract:
\t
\t
We present a computational model that offers an integrated quantitative, dynamic, and topological representation of intracellular signal networks, based on known components of epidermal growth factor (EGF) receptor signal pathways. The model provides insight into signal-response relationships between the binding of EGF to its receptor at the cell surface and the activation of downstream proteins in the signaling cascade. It shows that EGF-induced responses are remarkably stable over a 100-fold range of ligand concentration and that the critical parameter in determining signal efficacy is the initial velocity of receptor activation. The predictions of the model agree well with experimental analysis of the effect of EGF on two downstream responses, phosphorylation of ERK-1/2 and expression of the target gene, c-fos.
\t
\t
\t
\t
This model does not exactly reproduce the results given in the original publication. It has, though, the same reaction graph and gives very similar time courses for the conditions depicted in the article.
\t
\t
Several corrections were applied to the parameters described in the paper's supplementary materials. Some parameter names were replaced by the corresponding identical ones: k(r)26 by k(r)18, k(r)27 by k(r)19, k(r)30 by k(r)20, k(r)38 by k(r)24, k(r)39 by k(r)37, k(r)46 by k(r)44, k51 by k49, k(r)54 by k(r)52 and k62 by k62. In particular the parameter values described in the column \"remark\" of supplementary table 1 override the values explicitely written in the numerical columns:
name
in suppl. value used
in model value used
remarks
kr16
0.055
0.275
k30
7.9e6
2.1e6
as k20
kr30
0.3
0.4
as kr24
k38
3e7
1e7
as k20
kr38
0.055
0.55
as kr24
k52
1.1e5
5.34e7
k5 was used for v116, v119, v122 and v125 in addition of v107, v110 and v113 as listed in the legend of supplementary figure 2. k5 is calculated using th eformula from the matlab file not given in the supplements.
All rate constants were rescaled to minutes (k[min] = 60*k[sec]) and all second order rate constants additionally to molecules/cell with a cell volume of 1 picolitre (k[molecs/cell] = k[M]/(Vc*Na), with Vc=1e-12 l and Na = 6e23).
The association constant of internalized EGF was rescaled to molecules/endosome using an endosomal volume of 4.3 al (= 4.3*10 -18 litre).
The extracellular EGF concentration was converted to molecules per picolitre with a MW of 6045 Da.
[ng/ml]
[numb/pl]
50
4962
0.5
49.6
0.125
12.4
With the initial conditions given in the paper, the results could not be reproduced at all. Therefore the initial conditions used in the MATLAB file were adopted for SHC (1.01 * 10 5 instead of 1.01 * 10 6 ) and Ras_GDP. (7.2 * 10 4 instead of 1.14 * 10 7 )
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
This is an implementation of the Hodgkin-Huxley model of the electrical behavior of the squid axon membrane from: A quantitative description of membrane current and its application to conduction and excitation in nerve. A. L. Hodgkin and A. F. Huxley. (1952 ) Journal of Physiology 119(4): pp 500-544; pmID: 12991237 .
Abstract: This article concludes a series of papers concerned with the flow of electric current through the surface membrane of a giant nerve fibre (Hodgkin,Huxley & Katz, 1952; Hodgkin & Huxley, 1952 a-c). Its general object is to discuss the results of the preceding papers (Part I), to put them into mathematical form (Part II) and to show that they will account for conduction and excitation in quantitative terms (Part III).
This SBML model uses the same formalism as the one described in the paper, contrary to modern versions: * V describes the the membrane depolarisation relative to the resting potential of the membrane * opposing to modern practice, depolarization is negative , not positive , so the sign of V is different * inward transmembrane currents are considered positive (inward current positive), contrary to modern use The changeable parameters are the equilibrium potentials( E_R, E_K, E_L, E_Na ), the membrane depolarization ( V ) and the initial sodium and potassium channel activation and inactivation coefficients ( m,h,n ). The initial values of m,h,n for the model were calculated for V = 0 using the equations from the article: n t=0 = \u03b1_n V=0 /(\u03b1_n V=0 + \u03b2_n V=0 ) and equivalent expressions for h and m . For single excitations apply a negative membrane depolarization (V < 0). To achieve oscillatory behavior either change the resting potential to a more positive value or apply a constant negative ionic current (I < 0). Two assignments for parameters in the model, alpha_n and alpha_m, are not defined at V=-10 resp. -25 mV. We did not change this to keep the formulas similar to the original publication and as most integrators seem not to have any problem with it. The limits at V=-10 and -25 mV are 0.1 for alpha_n resp. 1 for alpha_m. We thank Mark W. Johnson for finding a bug in the model and his helpful comments.
Bruce Shapiro: Generated by Cellerator Version 1.0 update 3.0303 using Mathematica 4.1 for Microsoft Windows (June 13, 2001), April 2, 2003 16:49:13, using (PC,x86, Microsoft Windows,WindowsNT,Windows)
Bruce Shapiro: Corrected 29 March 2005
Nicolas Le Nov\u00e8re: Added Dbt and Cyc species, and the corresponding reactions. 23 April 2005
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
In summary, you are entitled to use this encoded model in absolutely any manner you deem suitable, verbatim, or with modification, alone or embedded it in a larger context, redistribute it, commercially or not, in a restricted way or not.
This model originates from BioModels Database: A Database of Annotated Published Models. It is copyright (c) 2005-2010 The BioModels Team. For more information see the terms of use .
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
In summary, you are entitled to use this encoded model in absolutely any manner you deem suitable, verbatim, or with modification, alone or embedded it in a larger context, redistribute it, commercially or not, in a restricted way or not.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
In summary, you are entitled to use this encoded model in absolutely any manner you deem suitable, verbatim, or with modification, alone or embedded it in a larger context, redistribute it, commercially or not, in a restricted way or not.
The model corresponds to the schemas 1 and 2 of Markevich et al 2004, as described in the figure 1 and the supplementary table S1. Phosphorylations and dephosphorylations follow distributive ordered kinetics. The phosphorylations are modeled with three elementary reactions: E+S<=>ES->E+P The dephosphorylations are modeled with five elementary reactions: E+S<=>ES->EP<=>E+P
The model corresponds to the schemas 1and 2 of Markevich et al 2004, as described in the figure 1 andmodelled using Michaelis-Menten like kinetics. Phosphorylations anddephosphorylations follow distributive ordered kinetics. Itreproduces figure 3 of the main article.
Mitogen-activated protein kinase (MAPK) cascades can operate as bistable switches residing in either of two different stable states. MAPK cascades are often embedded in positive feedback loops, which are considered to be a prerequisite for bistable behavior. Here we demonstrate that in the absence of any imposed feedback regulation, bistability and hysteresis can arise solely from a distributive kinetic mechanism of the two-site MAPK phosphorylation and dephosphorylation. Importantly, the reported kinetic properties of the kinase (MEK) and phosphatase (MKP3) of extracellular signal-regulated kinase (ERK) fulfill the essential requirements for generating a bistable switch at a single MAPK cascade level. Likewise, a cycle where multisite phosphorylations are performed by different kinases, but dephosphorylation reactions are catalyzed by the same phosphatase, can also exhibit bistability and hysteresis. Hence, bistability induced by multisite covalent modification may be a widespread mechanism of the control of protein activity.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
The model corresponds to the schema 3 of Markevich et al 2004, as described in the figure 2 and the supplementary table S2. Phosphorylations follow distributive random kinetics, while dephosphorylations follow an ordered mechanism. The phosphorylations are modeled with three elementary reactions: E+S<=>ES->E+P The dephosphorylations are modeled with five elementary reactions: E+S<=>ES->EP<=>E+P The model reproduces figure 5 in the main article.
The model is further described in: Signaling switches and bistability arising from multisite phosphorylation in protein kinase cascades. Markevich NI, Hoek JB, Kholodenko BN. J Cell Biol. 2004 Feb 2;164(3):353-9. PMID: 14744999 ; DOI: 10.1083/jcb.200308060 Abstract: Mitogen-activated protein kinase (MAPK) cascades can operate as bistable switches residing in either of two different stable states. MAPK cascades are often embedded in positive feedback loops, which are considered to be a prerequisite for bistable behavior. Here we demonstrate that in the absence of any imposed feedback regulation, bistability and hysteresis can arise solely from a distributive kinetic mechanism of the two-site MAPK phosphorylation and dephosphorylation. Importantly, the reported kinetic properties of the kinase (MEK) and phosphatase (MKP3) of extracellular signal-regulated kinase (ERK) fulfill the essential requirements for generating a bistable switch at a single MAPK cascade level. Likewise, a cycle where multisite phosphorylations are performed by different kinases, but dephosphorylation reactions are catalyzed by the same phosphatase, can also exhibit bistability and hysteresis. Hence, bistability induced by multisite covalent modification may be a widespread mechanism of the control of protein activity.
The model corresponds to the schema 3 of Markevich et al 2004, as described in the figure 2 and the supplementary table S3, and modelled using Michaelis-Menten like kinetics. Phosphorylations follow distributive random kinetics, while dephosphorylations follow an ordered mechanism.
This model originates from BioModels Database: A Database of Annotated Published Models. It is copyright (c) 2005-2007 The BioModels Team. For more information see the terms of use .
The model describes the double phosphorylation of MAP kinase by an ordered mechanism using the Michaelis-Menten formalism. Two different enzymes, MAPKK1 and MAPKK2, successively phosphorylate the MAP kinase, but one and the same phosphatase dephosphorylates both sites. The model reproduces figure S9 in the supplemental material of the article.
The model is further described in: Signaling switches and bistability arising from multisite phosphorylation in protein kinase cascades. Markevich NI, Hoek JB, Kholodenko BN. J Cell Biol. 2004 Feb 2;164(3):353-9. PMID: 14744999 ; DOI: 10.1083/jcb.200308060 Abstract: Mitogen-activated protein kinase (MAPK) cascades can operate as bistable switches residing in either of two different stable states. MAPK cascades are often embedded in positive feedback loops, which are considered to be a prerequisite for bistable behavior. Here we demonstrate that in the absence of any imposed feedback regulation, bistability and hysteresis can arise solely from a distributive kinetic mechanism of the two-site MAPK phosphorylation and dephosphorylation. Importantly, the reported kinetic properties of the kinase (MEK) and phosphatase (MKP3) of extracellular signal-regulated kinase (ERK) fulfill the essential requirements for generating a bistable switch at a single MAPK cascade level. Likewise, a cycle where multisite phosphorylations are performed by different kinases, but dephosphorylation reactions are catalyzed by the same phosphatase, can also exhibit bistability and hysteresis. Hence, bistability induced by multisite covalent modification may be a widespread mechanism of the control of protein activity.
This a model from the article: Modelling the dynamics of the yeast pheromone pathway. Kofahl B, Klipp E Yeast[2004 Jul; Volume: 21 (Issue: 10 )] Page info: 831-50 15300679, Abstract: We present a mathematical model of the dynamics of the pheromone pathways in haploid yeast cells of mating type MATa after stimulation with pheromone alpha-factor. The model consists of a set of differential equations and describes the dynamics of signal transduction from the receptor via several steps, including a G protein and a scaffold MAP kinase cascade, up to changes in the gene expression after pheromone stimulation in terms of biochemical changes (complex formations, phosphorylations, etc.). The parameters entering the models have been taken from the literature or adapted to observed time courses or behaviour. Using this model we can follow the time course of the various complex formation processes and of the phosphorylation states of the proteins involved. Furthermore, we can explain the phenotype of more than a dozen well-characterized mutants and also the graded response of yeast cells to varying concentrations of the stimulating pheromone.
The model was updated on 21st October 2010, by Vijayalakshmi Chelliah. The following changes were made: 1) The model has been converted to SBML l2v4.2) The model has been recurated and the curation figure was updated (units are in nanoMolar; but the publication has units in microMolar). Simulations were done using Copasi v4.6 (Build 32).3) Notes have been added.4) Annotation for one of the species has been corrected (Complex M).
The following are the four major differences between the original publication by Kofahl et al and the model that actually is able to replicate the results as depicted in the publication (those corrections have been made in agreement with the authors): 1. Bar1 is the inactive protease present inside the cell but the publication wrongly mentions that Bar1 is also the protease that is present on the extracellular surface. The model correctly names the protease in it's different forms by calling inactive Bar1 within the cell as Bar1, active Bar1 within the cell as Bar1a and extracellular Bar1 as Bar1aex 2. The initial amount of Alpha-factor is given as 1000nM but the model uses a value of 100nM. 3. The value of the paramenter k8 is given as 0.33 but the model uses a value of 0.033. 4. The value of the paramenter k41 is given as 0.002 but the model uses a value of 0.02.
Brown KS, Hill CC, Calero GA, Myers CR, Lee KH, Sethna JP, Cerione RA.
Phys Biol 2004 Dec; 1(3-4): 184-195
Abstract:
The inherent complexity of cellular signaling networks and their importance to a wide range of cellular functions necessitates the development of modeling methods that can be applied toward making predictions and highlighting the appropriate experiments to test our understanding of how these systems are designed and function. We use methods of statistical mechanics to extract useful predictions for complex cellular signaling networks. A key difficulty with signaling models is that, while significant effort is being made to experimentally measure the rate constants for individual steps in these networks, many of the parameters required to describe their behavior remain unknown or at best represent estimates. To establish the usefulness of our approach, we have applied our methods toward modeling the nerve growth factor (NGF)-induced differentiation of neuronal cells. In particular, we study the actions of NGF and mitogenic epidermal growth factor (EGF) in rat pheochromocytoma (PC12) cells. Through a network of intermediate signaling proteins, each of these growth factors stimulates extracellular regulated kinase (Erk) phosphorylation with distinct dynamical profiles. Using our modeling approach, we are able to predict the influence of specific signaling modules in determining the integrated cellular response to the two growth factors. Our methods also raise some interesting insights into the design and possible evolution of cellular systems, highlighting an inherent property of these systems that we call 'sloppiness.'
The figures in the paper show results from computationsperformed over an ensemble of all parameter sets that fit theavailable data. This file contains only the best fit parameters.The full ensemble of parameters is available athttp://www.lassp.cornell.edu/sethna/GeneDynamics/PC12DataFiles/(Also, the best-fit parameter set produces a curve for DN Rap1 thatis less \"peakish\" than the ensemble average.)
The conversion factors for EGF and NGF concentrations accountfor their molecular weights and the density of cells in the culturedish. These concentrations are saturating, so the exact values arenot critical.
Because the Erk data fit to measure only fold changes inactivity, there is no absolute scale for the y-axes. Thus thecurves from this file have different magnitudes than thosepublished.
To reproduce the figures from the paper: 2a) For EGF stimulation, set the initial concentration of EGFto 100 ng/ml * 100020 (molecule/cell)/(ng/ml) = 10002000. For NGF stimulation, set the initial concentration of NGF to50 ng/ml * 4560 (molecule/cell)/(ng/ml) = 456000 5a) To simulate LY294002 addition, set kPI3KRas and kPI3K to0. 5b) To simulate a dominant negative Rap1, set kRap1ToBRaf to0. To simulate a dominant negative Ras, set kRasToRaf1 andkPI3KRas to 0.
Almost all the data fit with this model by the authors arefrom Western blots. Given the uncertainties in antibodyeffectiveness and other factors, one can't a priori derive aconversion between the arbitrary units for a given set of data andmolecules per cell. So the authors used an adjustable \"scalefactor\" that converts between molecules per cell and Western blotunits.
For the EGF stimulation data in figure 2a) the scale factorconversion is 1.414e-05 (U/mg)/(molecule/cell). For the NGFstimulation data in figure 2a) it is 7.135e-06(U/mg)/(molecule/cell).
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
No inititial conditions are specified in the paper. Because there is a basal rate of transcription for each gene, it doesn't matter much. With the agreement of Paul Smolen, I put all the initial concentration at 0.001 nanomoles. N Le Nov\u00e8re.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
In summary, you are entitled to use this encoded model in absolutely any manner you deem suitable, verbatim, or with modification, alone or embedded it in a larger context, redistribute it, commercially or not, in a restricted way or not.
A minimal model of genomically based oscillation,\t\t\t\t\t\t\t based on two mutually interacting genes,\t\t\t\t\t\t\t an activator and a repressor. Postive feedback is provided by the activator protein,\t\t\t\t\t\t\t which binds to the promotors of both the activator and the repressor genes. Negative feedback is provided by the repressor protein which binds to the activator protein.
Generated by Cellerator Version 1.0 update 2.1127 using Mathematica 4.2 for \t\t\t\tMac OS X (June 4, 2002), November 27, 2002 12:17:46, using (PowerMac,PowerPC,\t\t\t\tMac OS X,MacOSX,Darwin)
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
In summary, you are entitled to use this encoded model in absolutely any manner you deem suitable, verbatim, or with modification, alone or embedded it in a larger context, redistribute it, commercially or not, in a restricted way or not.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
In summary, you are entitled to use this encoded model in absolutely any manner you deem suitable, verbatim, or with modification, alone or embedded it in a larger context, redistribute it, commercially or not, in a restricted way or not.
In order to reproduce the model, the volume of all compartment is set to 1, and the stoichiometry of CaER and CaM has been set to 0.25, corresponding to betaER/rhoER and betaM/rhoM described in the paper.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
In summary, you are entitled to use this encoded model in absolutely any manner you deem suitable, verbatim, or with modification, alone or embedded it in a larger context, redistribute it, commercially or not, in a restricted way or not.
R.J.Field and R.M.Noyes,J.Chem.Phys.60,1877 (1974)
Description
Field Noyes Version of Belousov-Zhabotinsky Reaction. BrO3 is held constant; HOBr is typically ignored,\t\t\t\t\t\t\t and can be replaced by an empty-set. The stoichiometry f is typically taken as 1/2 or 1.\t\t\t\t\t\t\t.
Initially Generated by Cellerator Version 1.0 update 2.1220 using Mathematica 4.2 for \t\t\t\tMac OS X (June 4, 2002), December 26, 2002 10:43:53, using (PowerMac,PowerPC,\t\t\t\tMac OS X,MacOSX,Darwin). author=B.E.Shapiro
Modified with SBMLeditor by Nicolas Le Nov\u00e8re, to fit the original article.
To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.
In summary, you are entitled to use this encoded model in absolutely any manner you deem suitable, verbatim, or with modification, alone or embedded it in a larger context, redistribute it, commercially or not, in a restricted way or not.