UNITS { (mA) = (milliamp) (mV) = (millivolt) (mS) = (millisiemens) } NEURON { SUFFIX ihlts NONSPECIFIC_CURRENT i RANGE gh,eh } PARAMETER { gh = 0.15 (mS/cm2) eh = -40 (mV) } ASSIGNED { v (mV) i (mA/cm2) } STATE { q } PROCEDURE iassign () { i = (1e-3) * gh * q * (v-eh) } INITIAL { q = qinf(v) iassign() } BREAKPOINT { SOLVE states METHOD cnexp iassign() } DERIVATIVE states { q' = (qinf(v)-q)/qtau(v) } FUNCTION qinf(v(mV)) { qinf = fun2(v, -80, 1, 10)*1(ms) } FUNCTION qtau(v(mV))(ms) { qtau = 200(ms)/(exp((v+70(mV))/20(mV))+exp(-(v+70(mV))/20(mV))) + 5(ms) } INCLUDE "aux_fun.inc"