Flexible resonance in prefrontal networks with strong feedback inhibition
Fig 8
(A) Asynchronous Poisson input with (i) constant instantaneous rate rinp and (ii) raster for 100 input cells with rinp = 10 sp/s (equivalent to 1 input cell with rinp = 1000 sp/s). (B) Poisson inputs with oscillatory instantaneous rate-modulation. (i) Instantaneous rate modulated by low synchrony square wave, parameterized by pulse width δinp and inter-pulse frequency finp. (ii) raster plot produced by square wave input. (iii) High synchrony, square wave rate-modulation. (iv) sine wave modulation, parameterized by frequency finp. (C) Output measures for the PC/IN network. (i) Diagram of a PC/IN network receiving an input from (B). (ii) Plots showing the instantaneous firing rate (iFR) computed for each population using Gaussian kernel regression on the spike raster. Time-averaged firing rates are defined by the mean iFR for each population. (iii) Power spectrum showing how population frequency is defined by the spectral frequency with peak power in the iFR.