Figure 3.

Neocortical circuit model used to simulate bursty gamma oscillation events through a weak PING mechanism. (A) Raster spiking plot of neuronal firing times from single trial of weak PING simulation. Top panel shows histogram of low-frequency, noisy Poisson inputs used to drive pyramidal neurons and interneurons in the model. Bottom panel shows population color-coded firing times of individual neurons. (B) Single trial current dipole signal (top) and Morlet wavelet spectrogram from dipole signal (bottom) from weak PING model. (C) Simulation of one hundred trials of weak PING model produces one hundred current dipole signals (top). Although gamma oscillation events occur at different times in each trial, averaging the wavelet spectrogram across trials (bottom) produces an appearance of a sustained gamma oscillation [adapted with permission from Figure 10 of Neymotin et al. (2020b) under the license: https://creativecommons.org/licenses/by/4.0/].