Evoked and oscillatory responses to natural vestibular stimulation: semicircular canal contributions

Gale, Steven, Prsa, Mario, Schurger, Aaron, Gay, Annietta, Paillard, Aurore, Herbelin, Bruno, Guyot, Jean-Philippe, Lopez, Christophe and Blanke, Olaf (2016) Evoked and oscillatory responses to natural vestibular stimulation: semicircular canal contributions. Journal of Neurophysiology, 115. pp. 1228-1242. ISSN 0022-3077

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Abstract / Description

While there have been numerous studies of the vestibular system in mammals, less is known about the brain mechanisms of vestibular processing in humans. In particular, of the studies that have been carried out in humans over the last 30 years, none has investigated how vestibular stimulation (VS) affects cortical oscillations. Here we recorded high-density electroencephalography (EEG) in healthy human subjects and a group of bilateral vestibular loss patients (BVPs) undergoing transient and constant-velocity passive whole body yaw rotations, focusing our analyses on the modulation of cortical oscillations in response to natural VS. The present approach overcame significant technical challenges associated with combining natural VS with human electrophysiology and reveals that both transient and constant-velocity VS are associated with a prominent suppression of alpha power (8–13 Hz). Alpha band suppression was localized over bilateral temporo-parietal scalp regions, and these alpha modulations were significantly smaller in BVPs. We propose that suppression of oscillations in the alpha band over temporo-parietal scalp regions reflects cortical vestibular processing, potentially comparable with alpha and mu oscillations in the visual and sensorimotor systems, respectively, opening the door to the investigation of human cortical processing under various experimental conditions during natural VS.

Item Type: Article
Uncontrolled Keywords: EEG; vestibular processing; vestibular cortex
Subjects: 100 Philosophy & psychology > 150 Psychology
Department: School of Social Sciences (to June 2021)
School of Social Sciences and Professions
Depositing User: Aurore Bardey
Date Deposited: 07 Aug 2020 14:43
Last Modified: 07 Aug 2020 14:43
URI: https://repository.londonmet.ac.uk/id/eprint/5925

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