MicrocircuitDB: The activity phase of postsynaptic neurons (Bose et al 2004)

The activity phase of postsynaptic neurons (Bose et al 2004)

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Accession:45513

We show, in a simplified network consisting of an oscillator inhibiting a follower neuron, how the interaction between synaptic depression and a transient potassium current in the follower neuron determines the activity phase of this neuron. We derive a mathematical expression to determine at what phase of the oscillation the follower neuron becomes active. This expression can be used to understand which parameters determine the phase of activity of the follower as the frequency of the oscillator is changed. See paper for more.
Reference:
1 . Bose A, Manor Y, Nadim F (2004) The activity phase of postsynaptic neurons in a simplified rhythmic network. J Comput Neurosci 17:245-61 [PubMed]

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Model Information (Click on a link to find other models with that property)

Model Type:	Realistic Network;
Brain Region(s)/Organism:	Stomatogastric ganglion;
Cell Type(s):	Abstract Morris-Lecar neuron;
Channel(s):	I A;
Gap Junctions:
Receptor(s):
Gene(s):
Transmitter(s):
Simulation Environment:	XPP; MATLAB;
Model Concept(s):	Activity Patterns; Bursting; Temporal Pattern Generation; Oscillations; Simplified Models;
Implementer(s):	Nadim, Farzan [Farzan at andromeda.Rutgers.edu]; Bose, Amitabha [bose at njit.edu]; Lewis, Timothy [tlewis at cns.nyu.edu];

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DBdep+A.ode.set

function [rko] = transeq2(delt)
% ==============================================

global x1 y gsyn ta tb c1 c2 c3 tk r1 r2 r3 ga tmed 
global z2 tlo

do=(1.0-exp(-x1/ta))/(1.0-exp(-x1/ta)*exp(-y/tb));
%do=0.7;
gpeak=gsyn*do;
gs=gpeak*exp(-z2/tk);
gatf=ga*(1.0-exp(-z2/tlo));
rko=r1*gatf*exp(-delt/tmed)+r2*gs*exp(-delt/tk)-r3;