Allen Institute: Sst-IRES-Cre VISp layer 2/3 472304676

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Accession:184173
This is an Allen Cell Types Database model of a Sst-IRES-Cre neuron from layer 2/3 of the mouse primary visual cortex. The model was based on a traced morphology after filling the cell with biocytin and optimized using experimental electrophysiology data recorded from the same cell. The electrophysiology data was collected in a highly standardized way to facilitate comparison across all cells in the database. The model was optimized by a genetic algorithm that adjusted the densities of conductances placed at the soma to match experimentally-measured features of action potential firing. Data and models from the Allen Cell Types Database are made available to the community under the Allen Institute's Terms of Use and Citation Policy.
Reference:
1 . Allen Institute (2015) Documentation Allen Cell Types Database
Model Information (Click on a link to find other models with that property)
Model Type: Neuron or other electrically excitable cell;
Brain Region(s)/Organism: Neocortex;
Cell Type(s): Neocortex layer 2-3 interneuron;
Channel(s): I L high threshold; I T low threshold; I A; I K; I M; I h; I K,Ca; I Sodium; I A, slow;
Gap Junctions:
Receptor(s):
Gene(s):
Transmitter(s):
Simulation Environment: NEURON; Python;
Model Concept(s): Parameter Fitting; Calcium dynamics; Vision;
Implementer(s):
Search NeuronDB for information about:  I L high threshold; I T low threshold; I A; I K; I M; I h; I K,Ca; I Sodium; I A, slow;
Files displayed below are from the implementation
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472304676
modfiles
Ca_HVA.mod *
Ca_LVA.mod *
CaDynamics.mod *
Ih.mod *
Im.mod *
Im_v2.mod *
K_P.mod *
K_T.mod *
Kd.mod *
Kv2like.mod *
Kv3_1.mod *
Nap.mod *
NaTa.mod *
NaTs.mod *
NaV.mod *
SK.mod *
                            
: Comment: LVA ca channel. Note: mtau is an approximation from the plots
: Reference:		Avery and Johnston 1996, tau from Randall 1997
: Comment: shifted by -10 mv to correct for junction potential
: Comment: corrected rates using q10 = 2.3, target temperature 34, orginal 21

NEURON	{
	SUFFIX Ca_LVA
	USEION ca READ eca WRITE ica
	RANGE gbar, g, ica
}

UNITS	{
	(S) = (siemens)
	(mV) = (millivolt)
	(mA) = (milliamp)
}

PARAMETER	{
	gbar = 0.00001 (S/cm2)
}

ASSIGNED	{
	v	(mV)
	eca	(mV)
	ica	(mA/cm2)
	g	(S/cm2)
	celsius (degC)
	mInf
	mTau
	hInf
	hTau
}

STATE	{
	m
	h
}

BREAKPOINT	{
	SOLVE states METHOD cnexp
	g = gbar*m*m*h
	ica = g*(v-eca)
}

DERIVATIVE states	{
	rates()
	m' = (mInf-m)/mTau
	h' = (hInf-h)/hTau
}

INITIAL{
	rates()
	m = mInf
	h = hInf
}

PROCEDURE rates(){
  LOCAL qt
  qt = 2.3^((celsius-21)/10)

	UNITSOFF
		v = v + 10
		mInf = 1.0000/(1+ exp((v - -30.000)/-6))
		mTau = (5.0000 + 20.0000/(1+exp((v - -25.000)/5)))/qt
		hInf = 1.0000/(1+ exp((v - -80.000)/6.4))
		hTau = (20.0000 + 50.0000/(1+exp((v - -40.000)/7)))/qt
		v = v - 10
	UNITSON
}

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