Mechanisms underlying gamma ('40Â Hz') network oscillations in the hippocampus-a mini-review

Gamma-frequency oscillations (∼30-100 Hz) in cortical network activity have been proposed to provide a temporal structure for various forms of cognitive processing. This review provides an update on recent experiments addressing the mechanisms underlying gamma-frequency network oscillations in the rodent hippocampus. Particular emphasis is placed on the correlation between in vivo observations and in vitro models.