Dynamic relationships between spontaneous and evoked electrophysiological activity.

ABSTRACT: Spontaneous neural activity fluctuations have been shown to influence trial-by-trial variation in perceptual, cognitive, and behavioral outcomes. However, the complex electrophysiological mechanisms by which these fluctuations shape stimulus-evoked neural activity remain largely to be explored. Employing a large-scale magnetoencephalographic dataset and an electroencephalographic replication dataset, we investigate the relationship between spontaneous and evoked neural activity across a range of electrophysiological variables. We observe that for high-frequency activity, high pre-stimulus amplitudes lead to greater evoked desynchronization, while for low frequencies, high pre-stimulus amplitudes induce larger degrees of event-related synchronization. We further decompose electrophysiologic

SUBMITTER: Wainio-Theberge S 

PROVIDER: S-EPMC8206204 | biostudies-literature | 2021 Jun

REPOSITORIES: biostudies-literature