124063/Rod_Kx.mod at master · ModelDBRepository/124063 · GitHub

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: Rod PhotoReceptor Kx channel

NEURON
{
	SUFFIX Kx

	USEION Kx WRITE iKx VALENCE 1


	RANGE gKx, gKxbar, VhalfKx, SKx
	RANGE eKx, aoKx


}

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

PARAMETER
{
	gKxbar = 1.04 (mS/cm2) <0,1e9>

        eKx = -74 (mV)

        VhalfKx=-49.9 (mV)


	aoKx = 0.66 (/s)

	SKx = 5.7     (mV)


}

STATE
{
	nKx

}

ASSIGNED
{
	v (mV)


	iKx (mA/cm2)

	infKx
	tauKx  (ms)

	gKx (mho/cm2)

}

INITIAL
{
	rate(v)
	nKx = infKx

}

BREAKPOINT
{
	SOLVE states METHOD cnexp
	gKx = (0.001)*gKxbar*nKx
	iKx = gKx*(v - eKx)


}

DERIVATIVE states
{
	rate(v)
	nKx' = (infKx - nKx)/tauKx

}


FUNCTION alphaKx(v(mV)) (/ms)
{
	alphaKx = 0.001*aoKx * exp( (v - VhalfKx)/(2*SKx) )
}

FUNCTION betaKx(v(mV))  (/ms)
{
	betaKx = 0.001*aoKx*exp( - ( v-VhalfKx)/(2*SKx) )
}


PROCEDURE rate(v (mV))
{
        LOCAL aKx, bKx

	aKx = alphaKx(v)
	bKx = betaKx(v)
	tauKx = 1/(aKx + bKx)
	infKx = aKx*tauKx

}