Impact of Adaptation Currents on Synchronization of Coupled Exponential Integrate-and-Fire Neurons
Figure 5
Effects of adaptation on phase locked states of coupled aEIF pairs.
Stable (solid black) and unstable (dashed grey) phase locked states of pairs of aEIF neurons spiking at with identical PRCs as a function of adaptation parameters. These phase locked states were obtained by evaluating the interaction function. Circles denote the steady-state phase differences by numerically simulating pairs of aEIF neurons according to eqs. (1)–(3). To detect bistability, the simulations were run multiple times and the pairs initialized either near in-phase or anti-phase with values of the periodic spiking trajectory. In A and B the neurons are coupled through excitatory, in C and D through inhibitory synapses, as indicated by the diagrams on the left. Synaptic conductances are equal (
) and conduction delays are not considered here (
). Synaptic time constants were
,
for excitatory and
,
for inhibitory connections. In A and C,
varies from 0 to 0.1
with
, whereas in B and D,
while
varies from 0 to 0.2 nA. All other model parameters are given in the Methods section. The corresponding changes in PRCs are indicated in the top row.