Fig. 17

Selected canard orbits (thick curves) plotted together with \(S^{a}_{\varepsilon }\) (red) and \(S^{s}_{\varepsilon }\) (green), in projection onto the (\(v,h,n\))-space, of the Hodgkin–Huxley model (32) with \(\varepsilon =0.0083\) and \(I=9.74\)