Overnight dynamics in scale-free and oscillatory spectral parameters of NREM sleep EEG.

ABSTRACT: Unfolding the overnight dynamics in human sleep features plays a pivotal role in understanding sleep regulation. Studies revealed the complex reorganization of the frequency composition of sleep electroencephalogram (EEG) during the course of sleep, however the scale-free and the oscillatory measures remained undistinguished and improperly characterized before. By focusing on the first four non-rapid eye movement (NREM) periods of night sleep records of 251 healthy human subjects (4-69 years), here we reveal the flattening of spectral slopes and decrease in several measures of the spectral intercepts during consecutive sleep cycles. Slopes and intercepts are significant predictors of slow wave activity (SWA), the gold standard measure of sleep intensity. The overnight increase in spectral

SUBMITTER: G Horvath C 

PROVIDER: S-EPMC9626458 | biostudies-literature | 2022 Nov

REPOSITORIES: biostudies-literature