Channel	Definition	Explicit expression
$I_L$	$g_L(V-E_L)$
$I_{\mathit{Na}}$	$g_{\mathit{Na}}{m}_{\infty }^{3}h(V-E_{\mathit{Na}})$	${\alpha }_m\left(V\right)=-0.1(V+35)/\exp [-0.1\left(V,+,35\right)-1]$ ${\beta }_m\left(V\right)=4\exp [-\left(V,+,60\right)/18]$ $m_{\infty }=\frac{{\alpha }_m}{{\alpha }_m+{\beta }_m}$ ${\alpha }_h\left(V\right)=0.07\exp [-\left(V,+,58\right)/20]$ ${\beta }_h\left(V\right)=1/\exp [-0.1\left(V,+,28\right)+1]$ $h_{\infty }=\frac{{\alpha }_h}{{\alpha }_h+{\beta }_h}$
$I_K$	$g_K{n}^4(V-E_{\mathit{Na}})$	${\alpha }_n\left(V\right)=-0.01(V+34)/\exp [-0.1\left(V,+,34\right)-1]$ ${\beta }_n\left(V\right)=0.125\exp [-\left(V,+,44\right)/80]$ $n_{\infty }=\frac{{\alpha }_n}{{\alpha }_n+{\beta }_n}$
$I_M$	$g_{M}z(V-E_{\mathit{Na}})$	$z_{\infty }\left(V\right)=1/(1+\exp (-(V+39)/5))$ ${\tau }_z=75ms$
$I_{\mathit{AHP}}$	$g_{\mathit{AHP}}q(V-E_K)$	$r_{\infty }\left(V\right)=1/(1+\exp (-(V+20)/10))$ $\frac{d{[{\mathit{Ca}}^{2+}]}_i}{\mathit{dt}}=-v{g}_{\mathit{Ca}}{r}^2\left(V,-,E_{\mathit{Ca}}\right)-\frac{{[{\mathit{Ca}}^{2+}]}_i}{{\tau }_{\mathit{Ca}}}$ $\frac{\mathit{dq}}{\mathit{dt}}=\frac{q_{\infty }\left({\left[{\mathit{Ca}}^{2+}\right]}_i\right)-q}{{\tau }_q}$ $q_{\infty }\left({\left[{\mathit{Ca}}^{2+}\right]}_i\right)=1/(1+16/({\left({\left[{\mathit{Ca}}^{2+}\right]}_i\right)}^4))$ ${\tau }_{\mathit{Ca}}=13ms;{\tau }_q=450ms;{\tau }_r=1ms$ $v=0.13\frac{{\mathit{cm}}^2}{ms-\mu A}$