You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
56 lines
652 B
56 lines
652 B
: Ih current |
|
: Created 8/6/02 - nwg |
|
|
|
NEURON { |
|
THREADSAFE |
|
SUFFIX hpkj |
|
NONSPECIFIC_CURRENT i |
|
RANGE gbar, gh, eh |
|
GLOBAL ninf, ntau |
|
} |
|
|
|
UNITS { |
|
(mA) = (milliamp) |
|
(mV) = (millivolt) |
|
(S) = (siemens) |
|
} |
|
|
|
PARAMETER { |
|
v (mV) |
|
|
|
gbar = .0001 (S/cm2) |
|
|
|
eh = -30 (mV) |
|
} |
|
|
|
ASSIGNED { |
|
gh (mho/cm2) |
|
i (mA/cm2) |
|
ninf |
|
ntau (ms) |
|
} |
|
|
|
STATE { |
|
n |
|
} |
|
|
|
INITIAL { |
|
rates(v) |
|
n = ninf |
|
} |
|
|
|
BREAKPOINT { |
|
SOLVE states METHOD cnexp |
|
gh = gbar * n |
|
i = gh*(v - eh) |
|
} |
|
|
|
DERIVATIVE states { |
|
rates(v) |
|
n' = (ninf - n)/ntau |
|
} |
|
|
|
PROCEDURE rates(v (mV)) { |
|
ninf = 1/(1+exp((v+90.1(mV))/9.9(mV))) |
|
ntau = (1000) * (0.19 (s) + 0.72 (s)*exp(-((v-(-81.5(mV)))/11.9(mV))^2)) |
|
} |