Temporal characteristics of gamma rhythm constrain properties of noise in an inhibition-stabilized network model.

ABSTRACT: Gamma rhythm refers to oscillatory neural activity between 30 and 80 Hz, induced in visual cortex by stimuli such as iso-luminant hues or gratings. The power and peak frequency of gamma depend on the properties of the stimulus such as size and contrast. Gamma waveform is typically arch-shaped, with narrow troughs and broad peaks, and can be replicated in a self-oscillating Wilson-Cowan (WC) model operating in an appropriate regime. However, oscillations in this model are infinitely long, unlike physiological gamma that occurs in short bursts. Further, unlike the model, gamma is faster after stimulus onset and slows down over time. Here, we first characterized gamma burst duration in local field potential data recorded from two monkeys as they viewed full screen iso-luminant hues. We then a

SUBMITTER: Krishnakumaran R 

PROVIDER: S-EPMC10502791 | biostudies-literature | 2023 Sep

REPOSITORIES: biostudies-literature