The association between working memory precision and the nonlinear dynamics of frontal and parieto-occipital EEG activity.

ABSTRACT: Electrophysiological working memory (WM) research shows brain areas communicate via macroscopic oscillations across frequency bands, generating nonlinear amplitude modulation (AM) in the signal. Traditionally, AM is expressed as the coupling strength between the signal and a prespecified modulator at a lower frequency. Therefore, the idea of AM and coupling cannot be studied separately. In this study, 33 participants completed a color recall task while their brain activity was recorded through EEG. The AM of the EEG data was extracted using the Holo-Hilbert spectral analysis (HHSA), an adaptive method based on the Hilbert-Huang transforms. The results showed that WM load modulated parieto-occipital alpha/beta power suppression. Furthermore, individuals with higher frontal theta power and l

SUBMITTER: Chang WS 

PROVIDER: S-EPMC10471634 | biostudies-literature | 2023 Aug

REPOSITORIES: biostudies-literature