Individual Alpha Frequency Determines the Impact of Bottom-Up Drive on Visual Processing.

ABSTRACT: Endogenous alpha oscillations propagate from higher-order to early visual cortical regions, consistent with the observed modulation of these oscillations by top-down factors. However, bottom-up manipulations also influence alpha oscillations, and little is known about how these top-down and bottom-up processes interact to impact behavior. To address this, participants performed a detection task while viewing a stimulus flickering at multiple alpha band frequencies. Bottom-up drive at a participant's endogenous alpha frequency either impaired or enhanced perception, depending on the frequency, but not amplitude, of their endogenous alpha oscillation. Fast alpha drive impaired perceptual performance in participants with faster endogenous alpha oscillations, while participants with slower osc

SUBMITTER: Nelli S 

PROVIDER: S-EPMC8171796 | biostudies-literature | 2021

REPOSITORIES: biostudies-literature