NEURON { POINT_PROCESS HalfGap ELECTRODE_CURRENT i RANGE g, i, vgap } PARAMETER { g = 1 (nanosiemens) } ASSIGNED { v (millivolt) vgap (millivolt) i (nanoamp) } BREAKPOINT { i = .001 * g * (vgap - v) } :the .001 is to fix the units to nA