Distinct roles of forward and backward alpha-band waves in spatial visual attention.

ABSTRACT: Previous research has associated alpha-band [8-12 Hz] oscillations with inhibitory functions: for instance, several studies showed that visual attention increases alpha-band power in the hemisphere ipsilateral to the attended location. However, other studies demonstrated that alpha oscillations positively correlate with visual perception, hinting at different processes underlying their dynamics. Here, using an approach based on traveling waves, we demonstrate that there are two functionally distinct alpha-band oscillations propagating in different directions. We analyzed EEG recordings from three datasets of human participants performing a covert visual attention task (one new dataset with N = 16, two previously published datasets with N = 16 and N = 31). Participants

SUBMITTER: Alamia A 

PROVIDER: S-EPMC10059684 | biostudies-literature | 2023 Mar

REPOSITORIES: biostudies-literature