Role of fast-spiking interneurons in modulating across-trial variability and within-trial correlations in the striatum.
The 7 matches
- [1] § Methods › Input model ↔ runcor.py, lines 71 to 118 · score 0.65 · overlapping cortical, spike trains, cortical source, Poisson, connection, neuron · Report a mismatch
- [2] § Statistical analysis › Downstream effect ↔ rungpe.py, lines 40 to 105 · score 0.62 · spike generator, GPe neuron, Poisson, lognormal, noise, uniform · Report a mismatch
- [3] § Methods › Stimulus-evoked activities ↔ runcor.py, lines 71 to 118 · score 0.61 · partially overlapped, spike trains, cortical sources, FSI, MSNs · Report a mismatch
- [4] § Methods › Connectivity model ↔ runcor.py, lines 168 to 217 · score 0.59 · fixed indegree, feedforward inhibition, autapse, multapses, connections, model · Report a mismatch
- [5] § Methods › Neuron model ↔ rungpe.py, lines 40 to 105 · score 0.58 · postsynaptic neuron, membrane potential, reset, events, model, GPe · Report a mismatch
- [6] § Methods › Connectivity model ↔ runcor.py, lines 168 to 217 · score 0.57 · FSI MSN connection, recurrent inhibition, delays, model, cortical · Report a mismatch
- [7] § Statistical analysis › Downstream effect ↔ runcor.py, lines 120 to 166 · score 0.52 · background noise, spike generator, Poisson, cortical, neuron, MSN · Report a mismatch
Paper
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The authors' code
Python · 308 lines · 11 KB · no license · 5 matches
- """ A cortical neuron motif simulator
- """
- # system
- import time
- import os
- # tools
- import argparse
- import json
- import pandas as pd
- # computation libs
- import numpy as np
- # plot
- import matplotlib.pyplot as plt
- from lib.mviz import visSpk, visCurve, multiPlot
- from lib.mcalc import gcf2ann
- # simulation libs
- from lib import params
- import nest
- def main():
- """Interneuron motif PC-PV-SOM-VIP
- """
- # create argument parser
- parser = argparse.ArgumentParser(description='Striatal Microcircuit.')
- # profiling
- parser.add_argument('--dpath', type=str, help='data path', default='./data')
- parser.add_argument('--fpath', type=str, help='data path', default='./plot')
- # simulation setting
- parser.add_argument('--epoch', type=int, help='number of epochs', default=2)
- parser.add_argument('--T', type=int, help='simulation time', default=1000)
- parser.add_argument('--Nm', type=int, help='number of MSNs', default=2500)
- parser.add_argument('--Nf', type=int, help='number of FSIs', default=0)
- # input setting
- parser.add_argument('--W', type=float, help='within-pool correlation', default=0.1)
- parser.add_argument('--B', type=float, help='between-pool correlation', default=0.1)
- parser.add_argument('--D', type=float, help='inhibitory synapse delay', default=2.0)
- parser.add_argument('--delay-width', type=float, help='half-width for uniform delay jitter (ms)', default=1.0)
- parser.add_argument('--weight-sigma', type=float, help='sigma for lognormal weight jitter', default=0.5)
- parser.add_argument('--nthreads', type=int, help='number of local NEST threads', default=1)
- # neuron setting
- parser.add_argument('--ntype', type=str, help='neuron type', default='iaf_cond_alpha')
- # visualize
- parser.add_argument('--viz', action='store_true', default=False)
- # parsing
- print('Parsing arguments ... ... ')
- # parse argument
- args = parser.parse_args()
- simtime = args.T
- # paths
- mode = 'rec_0_str'
- suffixpath = '/%s/Nf%d-W%s-B%s/'%(mode, args.Nf, args.W, args.B)
- recpath = args.dpath + suffixpath # path for saving recordings (gdf files)
- os.makedirs(recpath, exist_ok=True)
- if args.viz:
- figpath = args.fpath + suffixpath # path for saving figures
- spkpath = figpath + 'spk/'
- ratpath = figpath + 'rat/'
- wtspath = figpath + 'wt/'
- for path in [spkpath, ratpath, wtspath]:
- os.makedirs(path, exist_ok=True)
- print('Simulation start ... ... ')
- print(suffixpath)
- #* Motif network
- # neurons
- nTypes = ['MSN', 'FSI']
- nNums = [args.Nm, args.Nf]
- paramMSN = params.paramMSN
- paramFSI = params.paramFSI
- MSN_deg = int(nNums[0]/10)
- FSI_deg = int(nNums[0]/100*0.6)
- CTX_deg = 100
- allow_autapses = True
- allow_multapses = True
- # input
- print('inputs')
- B, W = args.B, args.W
- # generate input spike trains
- msd = 4294967295
- nest.ResetKernel()
- nest.set_verbosity("M_WARNING")
- nest.set(resolution=0.1, rng_seed=msd)
- if W > 0:
- nstm = int(CTX_deg / W)
- # partially overlapped cortical sources
- stm = nest.Create('poisson_generator', int(nstm*(2-B)), params={'rate': 10.0})
- # input recording
- inDetector = nest.Create('spike_recorder', 1)
- nest.Connect(stm, inDetector)
- # run simulation
- nest.Simulate(simtime)
- # get spike trains
- inSpks = nest.GetStatus(inDetector, 'events')[0]
- # # visualize input spikes
- # plt.figure(figsize=(6,4))
- # visSpk(inSpks['times'], inSpks['senders'], path='./input')
- # assert False
- print(np.unique(inSpks['senders']).size)
- print(inSpks)
- Js = [ [2.0, 1.0],
- [4.8, 0.5],
- [0.03, 0.],
- [0.5, 0.]]
- # reset kernel
- msd = int(time.time() * 1000.0) % 4294967295
- nest.ResetKernel()
- nest.set_verbosity("M_WARNING")
- nest.set(resolution=0.1, rng_seed=msd)
- # set number of local threads to speed up NEST operations
- try:
- nest.SetKernelStatus({'local_num_threads': max(1, int(args.nthreads))})
- except Exception:
- pass
- # neurons
- print('create neurons')
- # scale = 1/30
- # scale = 1/60
- scale = 0
- # heterogeneous parameters
- param_keys = ['C_m', 'tau_syn_in', 't_ref', 'V_th', 'g_L']
- nPops = {}
- nPops['MSN'] = nest.Create('iaf_cond_alpha', nNums[0])
- if scale > 0:
- sample_msn = params.sample_params_normal(paramMSN, designated_keys=param_keys, scale=scale, n_samples=nNums[0])
- nest.SetStatus(nPops['MSN'], sample_msn)
- else:
- nest.SetStatus(nPops['MSN'], paramMSN)
- if nNums[-1] > 0:
- nPops['FSI'] = nest.Create('iaf_cond_alpha', nNums[-1])
- if scale > 0:
- sample_fsi = params.sample_params_normal(paramFSI, designated_keys=param_keys, scale=scale, n_samples=nNums[-1])
- nest.SetStatus(nPops['FSI'], sample_fsi)
- else:
- nest.SetStatus(nPops['FSI'], paramFSI)
- # background noise
- bkgF = nest.Create('poisson_generator', 1, {'rate': 5.75e3})
- if args.Nf == 0 and args.W > 0:
- bkgM = nest.Create('poisson_generator', 1, {'rate': 3.2e3})
- else:
- bkgM = nest.Create('poisson_generator', 1, {'rate': 5.95e3})
- # cortical input
- if W > 0:
- stm = nest.Create('spike_generator', int(nstm*(2-B)))
- for i in range(int(nstm*(2-B))):
- spks = inSpks['times'][inSpks['senders'] == (i + 1)]
- stm[i].spike_times = np.concatenate([spks + e*simtime for e in range(args.epoch)])
- # connections
- print('generating connections')
- # background input (excitatory)
- nest.Connect(bkgM, nPops['MSN'], syn_spec={'weight': Js[0][0], 'delay': 1.0})
- if args.Nf > 0:
- nest.Connect(bkgF, nPops['FSI'], syn_spec={'weight': Js[0][-1], 'delay': 1.0})
- if W > 0:
- # cortical stimulus (excitatory)
- con_spec = {'rule': 'fixed_indegree', 'indegree': CTX_deg, 'allow_multapses': allow_multapses}
- syn_spec ={'synapse_model': 'static_synapse', 'weight': Js[1][0], 'delay': 1.0}
- nest.Connect(stm[:nstm], nPops['MSN'][:nNums[0]//2], con_spec, syn_spec)
- nest.Connect(stm[-nstm:], nPops['MSN'][nNums[0]//2:], con_spec, syn_spec)
- if args.Nf > 0:
- syn_spec ={'synapse_model': 'static_synapse', 'weight': Js[1][-1]/2, 'delay': 1.0}
- nest.Connect(stm[:nstm], nPops['FSI'], con_spec, syn_spec)
- nest.Connect(stm[-nstm:], nPops['FSI'], con_spec, syn_spec)
- # Recurrent inhibitory MSN→MSN connections
- con_spec = {
- 'rule': 'fixed_indegree',
- 'indegree': MSN_deg,
- 'allow_autapses': False,
- 'allow_multapses': allow_multapses
- }
- # Compute lognormal mu
- mu_msn = np.log(abs(Js[2][0])) - 0.5 * args.weight_sigma**2
- syn_spec = {
- "synapse_model": "static_synapse",
- "weight": -1.0 * nest.random.lognormal(mean=mu_msn, std=args.weight_sigma),
- "delay": nest.random.uniform(
- min=max(0.1, args.D - args.delay_width),
- max=args.D + args.delay_width
- ),
- }
- nest.Connect(nPops["MSN"], nPops["MSN"], con_spec, syn_spec)
- # Feedforward inhibitory FSI→MSN connections
- if args.Nf > 0:
- con_spec = {'rule': 'fixed_indegree', 'indegree': FSI_deg, 'allow_multapses': allow_multapses, 'allow_autapses': allow_autapses}
- # Compute lognormal mu
- mu_fsi = np.log(abs(Js[-1][0])) - 0.5 * args.weight_sigma**2
- syn_spec = {
- "synapse_model": "static_synapse",
- "weight": -1.0 * nest.random.lognormal(mean=mu_fsi, std=args.weight_sigma),
- "delay": nest.random.uniform(
- min=max(0.1, args.D - args.delay_width),
- max=args.D + args.delay_width
- ),
- }
- nest.Connect(nPops["FSI"], nPops["MSN"], con_spec, syn_spec)
- # record device
- print('link devices')
- # 'record_to': 'ascii'
- spikeDetector = nest.Create('spike_recorder', 1, {'label':recpath + 'spk'})
- for npop in nPops.values():
- nest.Connect(npop, spikeDetector)
- # subthreshold recording
- if args.Nf == 0:
- del nTypes[-1]
- del nNums[-1]
- # Select 10 neurons per type
- subNeurons = [nPops[ntype][:25] for ntype in nTypes]
- mulDetects = [
- nest.Create('multimeter', params={'record_from': ['V_m', 'g_ex', 'g_in'], 'interval': 0.1}, n=len(subNeurons[i]))
- for i, ntype in enumerate(nTypes)
- ]
- for neurons, detects in zip(subNeurons, mulDetects):
- for det, nrn in zip(detects, neurons):
- nest.Connect(det, nrn)
- # simulation
- print('simulating')
- initstates = [np.random.uniform(-70., -55., len(npop)) for npop in nPops.values()]
- for e in range(args.epoch):
- # initial state
- for npop, rvs in zip(nPops.values(), initstates):
- nest.SetStatus(npop, params='V_m', val=rvs.tolist())
- # simulate
- nest.Simulate(simtime)
- # spikes
- spikeEvents = nest.GetStatus(spikeDetector, 'events')[0]
- print('number of spikes: ', len(spikeEvents['times']))
- spikeTimes, spikeIds = spikeEvents['times'], spikeEvents['senders']
- # visualize
- print('visualize')
- if args.viz:
- # # input spikes
- # if W > 0:
- # pulseEvents = nest.GetStatus(inDetector, 'events')[0]
- # pulseTimes, pulseIds = pulseEvents['times'], pulseEvents['senders']
- # visSpk(pulseTimes, pulseIds-nNums[0], path=spkpath + 'input')
- mask = (spikeIds > nNums[0]-100) & (spikeIds <= nNums[0] + 100)
- visSpk(spikeTimes[mask], spikeIds[mask]-nNums[0]+100, path=spkpath + 'spk')
- # membrane potentials
- multiEvents = []
- for detects in mulDetects: # mulDetects is a list of lists
- events_per_type = [nest.GetStatus(det)[0]['events'] for det in detects]
- multiEvents.append(events_per_type)
- multiPlot(multiEvents, [0., simtime], nTypes, ratpath + 'vg_')
- # # firing rates
- # nNums = [nNums[0]//2, nNums[0]//2, args.Nf]
- # nTypes = ['M1', 'M2', 'FSI']
- # if args.Nf == 0:
- # del nNums[-1]
- # del nTypes[-1]
- # binsize = 100
- # tmBins = np.arange(0, simtime*args.epoch+1, binsize)
- # idBins = np.concatenate([[0], np.cumsum(nNums)]) + 1
- # ratesPop = np.histogram2d(spikeTimes, spikeIds, bins=[tmBins, idBins])[0] * 1e3 / binsize / nNums
- # visCurve([tmBins[:-1]]*len(nTypes), ratesPop.T,
- # 'time (ms)', 'rate (Hz)', 'firing rate', ratpath + 'fr_', nTypes)
- # print('mean firing rate: ', np.mean(ratesPop, axis=0))
- # save data
- np.savez(recpath + 'spk.npz', spikeIds, spikeTimes)
- # Save multimeter recordings
- data_dict = {}
- for type_idx, detects in enumerate(mulDetects):
- for det_idx, det in enumerate(detects):
- events = nest.GetStatus(det)[0]['events']
- key_prefix = f"{nTypes[type_idx]}_neuron{det_idx}"
- for key, values in events.items():
- data_dict[f"{key_prefix}_{key}"] = values
- filename = recpath + "mem.npz"
- np.savez(filename, **data_dict)
- print('done')
- if __name__ == '__main__':
- start_time = time.time()
- main()
- print("--- %s seconds ---" % (time.time() - start_time))
runcor.py at commit d387bdf, no license · at the source
Overview
- Division of Computational Science and Technology, School of Electrical Engineering and Computer Science, Digital Futures, KTH Royal Institute of Technology, Stockholm, Sweden
- Science for Life Laboratory, Stockholm, Sweden
- Current affiliation: Okinawa Institute of Science and Technology, Okinawa, Japan
- Digital Futures, KTH Royal Institute of Technology, Stockholm, Sweden
Abstract
The striatum comprises a network characterized by a highly shared feedforward inhibition (FFI) mediated by fast-spiking interneurons (FSI), which constitute only 1% of the striatal population. We investigated the dynamical consequences of this extensively shared FFI beyond inducing synchrony in a local striatal microcircuit. Our findings reveal that increased FFI sharing enhances the across-trial variability of striatal responses, activity of medium spiny neurons (MSNs), to cortical inputs, and endows the striatal network with the capacity to modulate output correlations in a bidirectional manner. Specifically, weakly shared cortical inputs become more correlated, whereas strongly shared cortical inputs are decorrelated in the presence of FSIs. These dynamic modulatory effects on MSNs, in turn, substantially alter the spiking statistics of downstream neurons in the globus pallidus, regarding across-trial variability and burstiness.
Reproduced under the paper's license (CC BY), from the paper cited above.
Repository
Its files are read in the Code ↔ Paper reader above, with 7 matches between paragraphs and lines of code.
weirdoglh/FSInet
d387bdf86a96a898f9f4e2d8a75bf52943558208, 22 December 2025Availability: 1 check, the latest on 30 September 2026: the link answers
- 30 September 2026: the link answers
10 files
- figs.ipynb, Jupyter, 1,102 lines
- lib/
mcalc.py , Python, 92 lines - lib/
mviz.py , Python, 174 lines - lib/
params.py , Python, 66 lines - nrn.ipynb, Jupyter, 156 lines
- runcor.py, Python, 308 lines, 5 matches
- runcor.sh, Shell, 97 lines
- rungpe.py, Python, 119 lines, 2 matches
- rungpe.sh, Shell, 29 lines
- README.md, Text, 17 lines
Code availability
The code for simulation and plotting is shared on GitHub https://
Reproduced under the paper's license (CC BY), from the paper cited above.
Tracing map
Proposed by the machine: these links were found in the paper and verified at the source, without human review. The map will receive a Zenodo DOI once one of the paper's authors has validated it with their ORCID.
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Data
No dataset and no data link were found in the paper.
Data Availability
Data availability Processed simulated data is shared on GitHub https://
Reproduced under the paper's license (CC BY), from the paper cited above.
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Version 1, 30 September 2026: the first record
Recorded: type, language, journal, volume, issue, pages, dates, 2 authors, 8 MeSH terms, 3 funders, 42 references.
Cite
This paper
Guo, L., & Kumar, A. (2026). Role of fast-spiking interneurons in modulating across-trial variability and within-trial correlations in the striatum. PLoS computational biology, 22(3), e1014099. https://
BibTeX
@article{guo2026role,
author = {Guo, Lihao and Kumar, Arvind},
title = {{Role of fast-spiking interneurons in modulating across-trial variability and within-trial correlations in the striatum}},
journal = {PLoS computational biology},
year = {2026},
month = mar,
volume = {22},
number = {3},
pages = {e1014099},
publisher = {PLOS},
issn = {1553-734X},
doi = {10.1371/
url = {https://
pmid = {41894433},
pmcid = {PMC13095104}
}
RIS
TY - JOUR
AU - Guo, Lihao
AU - Kumar, Arvind
TI - Role of fast-spiking interneurons in modulating across-trial variability and within-trial correlations in the striatum
T2 - PLoS computational biology
J2 - PLoS Comput Biol
PY - 2026
DA - 2026/
VL - 22
IS - 3
SP - e1014099
SN - 1553-734X
PB - PLOS
DO - 10.1371/
UR - https://
LA - en
ER -
CSL-JSON
{
"id": "10.1371/
"type": "article-journal",
"title": "Role of fast-spiking interneurons in modulating across-trial variability and within-trial correlations in the striatum",
"container-title": "PLoS computational biology",
"author": [
{
"family": "Guo",
"given": "Lihao"
},
{
"family": "Kumar",
"given": "Arvind"
}
],
"container-title-short":
"volume": "22",
"issue": "3",
"page": "e1014099",
"DOI": "10.1371/
"PMID": "41894433",
"PMCID": "PMC13095104",
"ISSN": "1553-734X",
"publisher": "PLOS",
"URL": "https://
"language": "en",
"issued": {
"date-parts": [
[
2026,
3,
27
]
]
}
}
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