Bistable Dynamics Underlying Excitability of Ion Homeostasis in Neuron Models
Figure 7
Bifurcation diagram of the fixed points for the Kager et al. model[17].
The physiological equilibrium is at
, the minimal physiological pump rate is
, and the recovery rate is
. The limit cycle emanating from the HB undergoes four saddle–node bifurcations of limit cycles (indicated by the stability changes, but not explicitly labled) before it disappears in a homoclinic bifurcation (HOM). Like in Fig. 5 the fixed point line for the corresponding leak–only model is shaded. Its value at
indicates the Donnan equilibrium.