Fig. 9.

Example 3 of different bifurcation scenarios with decreasing [${\text{Ca}}^{2+}{]}_{\text{o}}$ for different [4-AP]${}_{\text{o}}$. a Bifurcation scenario 1 corresponding to case-3 at 0 mM [4-AP]${}_{\text{o}}$. Period-1 bursting changed to period-2 firing and to period-1 spiking; b bifurcation scenario 2 corresponding to case-2 at 0.25 mM [4-AP]${}_{\text{o}}$. Period-1 bursting changed to period-1 spiking via a process from period-doubling bifurcation to chaos. The number represents the spikes per burst