Spectral fingerprints or spectral tilt? Evidence for distinct oscillatory signatures of memory formation.

ABSTRACT: Decreases in low-frequency power (2-30 Hz) alongside high-frequency power increases (>40 Hz) have been demonstrated to predict successful memory formation. Parsimoniously, this change in the frequency spectrum can be explained by one factor, a change in the tilt of the power spectrum (from steep to flat) indicating engaged brain regions. A competing view is that the change in the power spectrum contains several distinct brain oscillatory fingerprints, each serving different computations. Here, we contrast these two theories in a parallel magnetoencephalography (MEG)-intracranial electroencephalography (iEEG) study in which healthy participants and epilepsy patients, respectively, studied either familiar verbal material or unfamiliar faces. We investigated whether modulations in specific fr

SUBMITTER: Fellner MC 

PROVIDER: S-EPMC6687190 | biostudies-literature | 2019 Jul

REPOSITORIES: biostudies-literature