TITLE Persistent Na Channels
:
: instantaneously gated channels



NEURON {
	SUFFIX nap
	USEION na READ ena WRITE ina
	RANGE gna
	RANGE m_inf
}


UNITS {
	(mA) = (milliamp)
	(mV) = (millivolt)
}

PARAMETER {
	gna  = .006  (mho/cm2)
	ena           (mV)
	v               (mV)
}

STATE {
	m 
}

ASSIGNED {
	ina     (mA/cm2)
	m_inf
}


BREAKPOINT {
	SOLVE states
	ina = gna * m * (v - ena)
}


PROCEDURE states() {    
	m_inf= 1/(1+exp((v-(-30))/-5))
	m = m_inf
	VERBATIM
	return 0;
	ENDVERBATIM
}

UNITSOFF
INITIAL {

	m = 0
}