Alpha oscillations do not implement gain control in early visual cortex but rather gating in parieto-occipital regions.

ABSTRACT: Spatial attention provides a mechanism for, respectively, enhancing relevant and suppressing irrelevant information. While it is well established that attention modulates oscillations in the alpha band, it remains unclear if alpha oscillations are involved in directly modulating the neuronal excitability associated with the allocation of spatial attention. In this study, in humans, we utilized a novel broadband frequency (60-70 Hz) tagging paradigm to quantify neuronal excitability in relation to alpha oscillations in a spatial attention paradigm. We used magnetoencephalography to characterize ongoing brain activity as it allows for localizing the sources of both the alpha and frequency tagging responses. We found that attentional modulation of alpha power and the frequency tagging respons

SUBMITTER: Zhigalov A 

PROVIDER: S-EPMC7670647 | biostudies-literature | 2020 Dec

REPOSITORIES: biostudies-literature