Brain dynamics during the sleep onset transition: An EEG source localization study.

ABSTRACT: EEG source localization is an essential tool to reveal the cortical sources underlying brain oscillatory activity. We applied LORETA, a technique of EEG source localization, to identify the principal brain areas involved in the process of falling asleep (sleep onset, SO). We localized the contributing brain areas of activity in the classical frequency bands and tracked their temporal evolution (in 2-min intervals from 2 min prior to SO up to 10 min after SO) during a baseline night and subsequent recovery sleep after total sleep deprivation of 40 h. Delta activity (0.5-5 Hz) gradually increased both in baseline and recovery sleep, starting in frontal areas and finally involving the entire cortex. This increase was steeper in the recovery condition. The evolution of sigma activity (12-16 Hz

SUBMITTER: Fernandez Guerrero A 

PROVIDER: S-EPMC6586601 | biostudies-literature | 2019 Jan

REPOSITORIES: biostudies-literature