/* Author: Xu Zhang @UConn, Jan., 2019
Synaptic mechanisms between PC-DCN, PC-NO, and MC (PY)-PN-DCN (PN: pontine nucleus)
This script cannot be executed individually
*/
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// PC-DCN Pathway
access DCNcell
// PC2DCN_delay = 4.2 // Delay determined from Hoebeek et al., 2008
// PC2NO_delay = 4.2
// Synaptic noise to DCN
objref DCN_noisyn
DCN_noisyn = new Random(PC2DCNrnd)
DCN_noisyn.normal(0, 1e-7*noiseSwitch)
// Linear fast inhibition by PC simple spikes
objref f_PC2DCN
f_PC2DCN = new File()
f_PC2DCN.ropen("params_PC2DCN.txt")
double PC2DCN[200]
for i = 0,199 {
PC2DCN[i] = f_PC2DCN.scanvar()
}
objref PC2DCN_syn[200]
PC2DCNcount = 0
for j = 0,199 {
for k = 0,PC2DCN[j]-1 {
tmpDCNind = f_PC2DCN.scanvar()-1
DCNcell[tmpDCNind] PC2DCN_syn[PC2DCNcount] = new tanhSyn(0.2)
setpointer PC2DCN_syn[PC2DCNcount].vpre, PCcell[j].v(0.5)
PC2DCN_syn[PC2DCNcount].g = 1e-3
PC2DCN_syn[PC2DCNcount].voff = -52
PC2DCN_syn[PC2DCNcount].rparam = 1
PC2DCN_syn[PC2DCNcount].alpha = 0.2
PC2DCN_syn[PC2DCNcount].tau = 2.4
PC2DCN_syn[PC2DCNcount].e = -80
DCN_noisyn.play(&PC2DCN_syn[PC2DCNcount].noise)
PC2DCNcount = PC2DCNcount + 1
}
}
f_PC2DCN.close()
// PC-DCN Pathway End
////////////////////////////////////////////////
////////////////////////////////////////////////
// PC-NO Pathway
objref PC2NO_syn[200]
// Synaptic noise to NO
objref NO_noisyn
NO_noisyn = new Random(PC2NOrnd)
NO_noisyn.normal(0, 1e-10*noiseSwitch)
PC2NOcount = 0
for j = 0,4 {
for k = 0,39 {
NOcell[j] PC2NO_syn[PC2NOcount] = new tanhSyn(0.01+k*0.0001)
setpointer PC2NO_syn[PC2NOcount].vpre, PCcell[j*40+k].v(0.5)
PC2NO_syn[PC2NOcount].g = 2.8e-5
PC2NO_syn[PC2NOcount].voff = -52
PC2NO_syn[PC2NOcount].rparam = 1
PC2NO_syn[PC2NOcount].alpha = 0.2
PC2NO_syn[PC2NOcount].tau = 35
PC2NO_syn[PC2NOcount].e = -80
// Synaptic noise
NO_noisyn.play(&PC2NO_syn[PC2NOcount].noise)
PC2NOcount = PC2NOcount + 1
}
}
// PC-NO Pathway End
////////////////////////////////////////////////
////////////////////////////////////////////////
// PYcell-PN-DCN Pathway (through mossy fiber)
// AMPA
objref PY2PN2DCN_syn_AMPA[100], NC_PY2PN2DCN_syn_AMPA[100]
for i = 0,99 {
DCNcell[i/20] PY2PN2DCN_syn_AMPA[i] = new NoisyExpSyn(0.9+i*0.0001)
PY2PN2DCN_syn_AMPA[i].tau = 1 // (ms)
PY2PN2DCN_syn_AMPA[i].e = 0
PYcell[i] NC_PY2PN2DCN_syn_AMPA[i] = new NetCon(&v(0.5), PY2PN2DCN_syn_AMPA[i], -40, 1.7, 2.1e-4) // Delay determined from Ito et al., 1970
// Synaptic noise
DCN_noisyn.play(&PY2PN2DCN_syn_AMPA[i].noise)
}
// NMDA
objref PY2PN2DCN_syn_NMDA[100], NC_PY2PN2DCN_syn_NMDA[100]
for i = 0,99 {
DCNcell[i/20] PY2PN2DCN_syn_NMDA[i] = new NoisyExp2Syn(0.8+i*0.0001)
PY2PN2DCN_syn_NMDA[i].tau1 = 1 // (ms)
PY2PN2DCN_syn_NMDA[i].tau2 = 6 // (ms)
PY2PN2DCN_syn_NMDA[i].e = 0
PYcell[i] NC_PY2PN2DCN_syn_NMDA[i] = new NetCon(&v(0.5), PY2PN2DCN_syn_NMDA[i], -40, 1.7, 1.26e-4)
// Synaptic noise
DCN_noisyn.play(&PY2PN2DCN_syn_NMDA[i].noise)
}
// PYcell-PN-DCN Pathway End
////////////////////////////////////////////////