:Comment : The transient component of the K current :Reference : : Voltage-gated K+ channels in layer 5 neocortical pyramidal neurones from young rats:subtypes and gradients,Korngreen and Sakmann, J. Physiology, 2000 :Comment : shifted -10 mv to correct for junction potential :Comment: corrected rates using q10 = 2.3, target temperature 34, orginal 21 : **Modified to use 'celsius' for temperature to correct rates by Aman Aberra** NEURON { SUFFIX K_Tst USEION k READ ek WRITE ik RANGE gK_Tstbar, gK_Tst, ik } UNITS { (S) = (siemens) (mV) = (millivolt) (mA) = (milliamp) } PARAMETER { gK_Tstbar = 0.00001 (S/cm2) } ASSIGNED { v (mV) ek (mV) ik (mA/cm2) gK_Tst (S/cm2) mInf mTau hInf hTau } STATE { m h } BREAKPOINT { SOLVE states METHOD cnexp gK_Tst = gK_Tstbar*(m^4)*h ik = gK_Tst*(v-ek) } DERIVATIVE states { rates() m' = (mInf-m)/mTau h' = (hInf-h)/hTau } INITIAL{ rates() m = mInf h = hInf } PROCEDURE rates(){ LOCAL qt :qt = 2.3^((34-21)/10) qt = 2.3^((celsius-21)/10) UNITSOFF v = v + 10 mInf = 1/(1 + exp(-(v+0)/19)) mTau = (0.34+0.92*exp(-((v+71)/59)^2))/qt hInf = 1/(1 + exp(-(v+66)/-10)) hTau = (8+49*exp(-((v+73)/23)^2))/qt v = v - 10 UNITSON }