Shape analysis of gamma rhythm supports a superlinear inhibitory regime in an inhibition-stabilized network.

ABSTRACT: Visual inspection of stimulus-induced gamma oscillations (30-70 Hz) often reveals a non-sinusoidal shape. Such distortions are a hallmark of non-linear systems and are also observed in mean-field models of gamma oscillations. A thorough characterization of the shape of the gamma cycle can therefore provide additional constraints on the operating regime of such models. However, the gamma waveform has not been quantitatively characterized, partially because the first harmonic of gamma, which arises because of the non-sinusoidal nature of the signal, is typically weak and gets masked due to a broadband increase in power related to spiking. To address this, we recorded local field potential (LFP) from the primary visual cortex (V1) of two awake female macaques while presenting full-field grati

SUBMITTER: Krishnakumaran R 

PROVIDER: S-EPMC8880865 | biostudies-literature | 2022 Feb

REPOSITORIES: biostudies-literature