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56 lines
652 B
56 lines
652 B
2 years ago
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: Ih current
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: Created 8/6/02 - nwg
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NEURON {
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THREADSAFE
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SUFFIX hpkj
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NONSPECIFIC_CURRENT i
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RANGE gbar, gh, eh
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GLOBAL ninf, ntau
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}
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UNITS {
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(mA) = (milliamp)
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(mV) = (millivolt)
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(S) = (siemens)
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}
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PARAMETER {
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v (mV)
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gbar = .0001 (S/cm2)
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eh = -30 (mV)
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}
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ASSIGNED {
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gh (mho/cm2)
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i (mA/cm2)
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ninf
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ntau (ms)
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}
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STATE {
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n
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}
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INITIAL {
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rates(v)
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n = ninf
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}
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BREAKPOINT {
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SOLVE states METHOD cnexp
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gh = gbar * n
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i = gh*(v - eh)
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}
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DERIVATIVE states {
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rates(v)
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n' = (ninf - n)/ntau
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}
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PROCEDURE rates(v (mV)) {
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ninf = 1/(1+exp((v+90.1(mV))/9.9(mV)))
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ntau = (1000) * (0.19 (s) + 0.72 (s)*exp(-((v-(-81.5(mV)))/11.9(mV))^2))
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}
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