Impact of Adaptation Currents on Synchronization of Coupled Exponential Integrate-and-Fire Neurons

doi:10.1371/journal.pcbi.1002478

Impact of Adaptation Currents on Synchronization of Coupled Exponential Integrate-and-Fire Neurons

Figure 3

Bifurcation currents of the aEIF model and dependence of PRC characteristics on the input current.

A,B: Rheobase current (solid black), SN and AH bifurcation currents , (dashed grey, dashed black) respectively, as well as input current (green) which separates type I (blue) and type II (yellow) PRC regions, as a function of , for (A) and (B). At a BT bifurcation occurs at (where the SN and the AH bifurcations meet) marked by the red dot. The region around is displayed in a zoomed view. If the system undergoes a SN bifurcation at , if an AH bifurcation occurs at . C,D: Spike frequencies corresponding to the input currents in A and B. Note that the region in - space where the PRCs are type II is very shallow in A compared to B, the corresponding regions in - space shown in C and D however are rather similar. This is due to the steep (flat) - relationship for () respectively (see Fig. 1D,E). E,F: PRCs with locations in - space as indicated, scaled to the same period .

doi: https://doi.org/10.1371/journal.pcbi.1002478.g003