Fig. 11

Conductance-based Morris–Lecar model with SNIC and adaptive current. (A) Adaptation and linearization of the f–I curve are seen for large adaptive conductance (\(g _{z} = 4\mbox{ nS}\), blue), but not for small conductance (\(g_{z} = 0.2\mbox{ nS}\), red). (B) Curves of \(v_{\mathrm{equiv}}\) are shown for equally spaced values of I, \(41, 43.5, 46\) pA, increasing from left to right. Each trajectory evolves closely around the intersection point of the equivalent voltage curve and the w-nullcline for each I. To keep the diagram simple, we have plotted all the w nullclines with \(\Delta= \Delta(I_{\star}) = -54\mbox{ mV}\)