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. 2015 Sep 26;25(10):1073–1188. doi: 10.1002/hipo.22488

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© 2015 The Authors Hippocampus Published by Wiley Periodicals, Inc.

This is an open access article under the terms of the Creative Commons Attribution‐NonCommercial‐NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non‐commercial and no modifications or adaptations are made.

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Fast oscillations supported by chemical synapses in a model. (A–C) Ripple frequency oscillations in a strongly driven network with pyramidal cells and interneurons, but without pyramid‐to‐pyramid connections (such as CA1). (A) Pyramidal population rastergram and (B) interneuron population rastergram. Right: strongly skewed distribution of firing rates. (C) Instantaneous population firing rate of pyramidal cells (red) and interneurons. (E–H) Same network as in the left but with slow time constants, added recurrent excitatory connections between pyramidal cells and weaker external noise drive (mimicking the CA3 region). Note slow gamma oscillation frequency in the power spectrum. Reproduced from Brunel and Wang (2003).