Dendritic Impedance in Neocortical L5 PT neurons (Kelley et al. accepted)

 Download zip file 
Help downloading and running models
Accession:266851
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.
Reference:
1 . Kelley C, Dura-Bernal S, Neymotin SA, Antic SD, Carnevale NT, Migliore M, Lytton WW (2021) Effects of Ih and TASK-like shunting current on dendritic impedance in layer 5 pyramidal-tract neurons. J Neurophysiology (accepted)
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:
Cell Type(s): Neocortex L5/6 pyramidal GLU cell; Neocortex M1 L5B pyramidal pyramidal tract GLU cell;
Channel(s): I h; TASK channel;
Gap Junctions:
Receptor(s):
Gene(s):
Transmitter(s):
Simulation Environment: NEURON; Python; NetPyNE;
Model Concept(s): Impedance;
Implementer(s): Kelley, Craig;
Search NeuronDB for information about:  Neocortex L5/6 pyramidal GLU cell; Neocortex M1 L5B pyramidal pyramidal tract GLU cell; I h; TASK channel;
/
L5PYR_Resonance-master
models
Neymotin
mod
ar_traub.mod *
cadad.mod *
cadyn.mod *
cagk.mod *
cal_mh.mod *
cal_mig.mod *
can_mig.mod *
canin.mod *
cat_mig.mod *
cat_traub.mod *
catcb.mod *
gabab.mod *
h_BS.mod *
h_harnett.mod
h_kole.mod *
h_migliore.mod *
HCN1.mod *
hin.mod *
IC.mod *
ican_sidi.mod *
IKsin.mod *
kadist.mod *
kap_BS.mod *
kapcb.mod *
kapin.mod *
kBK.mod *
kctin.mod *
kdmc_BS.mod *
kdr_BS.mod *
kdrin.mod *
MyExp2SynBB.mod *
MyExp2SynNMDABB.mod *
nafx.mod *
nap_sidi.mod *
nax_BS.mod *
savedist.mod *
vecstim.mod *
ghk.inc *
misc.h
parameters.multi *
                            
TITLE t-type calcium channel with high threshold for activation
: used in somatic and dendritic regions 
: Updated to use CVode --Carl Gold 08/10/03


NEURON {
	SUFFIX catcb
	USEION ca READ cai, eca    
        RANGE gcatbar, iCa
        RANGE gcatbar, ica
	GLOBAL hinf, minf
}

UNITS {
	(mA) = (milliamp)
	(mV) = (millivolt)
	(molar) = (1/liter)
	(mM) =	(millimolar)
	FARADAY = (faraday) (coulomb)
	R = (k-mole) (joule/degC)
}

PARAMETER {           
	gcatbar = 0   (mho/cm2)  
	zetam = -3
	zetah = 5.2
	vhalfm =-36 (mV)
	vhalfh =-68 (mV)
	tm0=1.5(ms)
	th0=10(ms)
}



ASSIGNED {     : parameters needed to solve DE
	v            (mV)
	celsius      (degC)
	ica          (mA/cm2)
	cai          (mM)       
	eca          (mV)       
        minf
        hinf
}


STATE {	
	m 
	h 
}  

INITIAL {
	rates(v)
        m = minf
        h = hinf
}

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

FUNCTION ghk(v(mV), ci(mM), co(mM)) (.001 coul/cm3) {
	LOCAL z, eci, eco
	z = (1e-3)*2*FARADAY*v/(R*(celsius+273.15))
	eco = co*efun(z)
	eci = ci*efun(-z)
	ghk = (.001)*2*FARADAY*(eci - eco)
}

FUNCTION efun(z) {
	if (fabs(z) < 1e-4) {
		efun = 1 - z/2
	}else{
		efun = z/(exp(z) - 1)
	}
}


DERIVATIVE states {
	rates(v)
	m' = (minf -m)/tm0
	h'=  (hinf - h)/th0
}


PROCEDURE rates(v (mV)) { 
        LOCAL a, b
        
	a = alpm(v)
	minf = 1/(1+a)
        
        b = alph(v)
	hinf = 1/(1+b)
}



FUNCTION alpm(v(mV)) {
UNITSOFF
  alpm = exp(1.e-3*zetam*(v-vhalfm)*9.648e4/(8.315*(273.16+celsius))) 
UNITSON
}

FUNCTION alph(v(mV)) {
UNITSOFF
  alph = exp(1.e-3*zetah*(v-vhalfh)*9.648e4/(8.315*(273.16+celsius))) 
UNITSON
}


Loading data, please wait...