Effects of neural oscillation power and phase on discrimination performance in a visual tilt illusion

We presented center gratings at participants' subjective vertical angle and had participants report whether the grating appeared tilted clockwise or counterclockwise from vertical on each trial while measuring their brain activity with electroencephalography (EEG). In addition to effects of alpha power and aperiodic slope, we observed robust associations between orientation perception and alpha and theta phase, consistent with fluctuating illusion magnitude across the oscillatory cycle. These results confirm that oscillation phase affects the complex processing involved in stimulus discrimination, consistent with its purported role in canonical computations that underpin cognition.PMID:38569544 | DOI:10.1016/j.cub.2024.03.014

Source: Current Biology - April 3, 2024 Category: Biology Authors: Jessica G Williams William J Harrison Henry A Beale Jason B Mattingley Anthony M Harris Source Type: research