2026-04-17T23:30:05Zhttps://recercat.cat/oai/request

oai:recercat.cat:2445/2160512025-12-04T22:30:17Zcom_2072_1057col_2072_478917col_2072_478931

00925njm 22002777a 4500 dc Guex, Raphael author Ros, Tomas author Mégevand, Pierre author Spinelli, Laurent author Seeck, Margitta author Vuilleumier, Patrik author Domínguez-Borràs, Judith author 2024-10-25T12:59:40Z 2024-10-25T12:59:40Z 2023-02-15 2024-10-25T12:59:40Z Alpha cortical oscillations have been proposed to suppress sensory processing in the visual, auditory, and tactile domains, influencing conscious stimulus perception. However, it is unknown whether oscillatory neural activity in the amygdala, a subcortical structure involved in salience detection, has a similar impact on stimulus awareness. Recording intracranial electroencephalography (EEG) from 9 human amygdalae during face detection in a continuous flash suppression task, we found increased spectral prestimulus power and phase coherence, with most consistent effects in the alpha band, when faces were undetected relative to detected, similarly as previously observed in cortex with this task using scalp-EEG. Moreover, selective decreases in the alpha and gamma bands preceded face detection, with individual prestimulus alpha power correlating negatively with detection rate in patients. These findings reveal for the first time that prestimulus subcortical oscillations localized in human amygdala may contribute to perceptual gating mechanisms governing subsequent face detection and offer promising insights on the role of this structure in visual awareness. Cos amigdaloide Estimulació del cervell Amygdaloid body Brain stimulation Prestimulus amygdala spectral activity is associated with visual face awareness