Figure 5.

Period doubled limit cycle in the heterogeneous network and in MFIII. The network consists of 5000 neurons, with parameters as in Table 1, except g_syn = 200 and the applied current which is normally distributed with mean 〈I_app〉 = 1100 pA and variance σ_I = 2000 pA. (A) Raster plot of 100 randomly selected neurons of the network arranged in order of increasing current. Individual neuron behaviors include burst firing, alternate burst firing, tonic firing and quiescence. (B) Close-up of raster plot. The neurons appear to fire in “traveling waves” during a burst. (C) Comparison of the mean variables of the large network simulation and the simulations of the mean field systems. Only MFIII is able to reproduce the period doubling behavior. (D) Comparison of the “phase portrait” of period doubled limit cycle for MFIII and the mean variables of network.