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Transcranial modulation of brain oscillatory responses: A concurrent tDCS–MEG investigation / Claire, Hanley

NeuroImage

Swansea University Author: Claire, Hanley

DOI (Published version): 10.1016/j.neuroimage.2015.12.021

Abstract

The physiological mechanisms underlying the effects of transcranial direct current stimulation (tDCS) are still largely unknown. To provide novel insight into the neurobiology of tDCS, stimulation was applied concurrently with Magnetoencephalography (MEG). This occurred while participants completed...

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Published in: NeuroImage
Published: 2015
URI: https://cronfa.swan.ac.uk/Record/cronfa25304
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Abstract: The physiological mechanisms underlying the effects of transcranial direct current stimulation (tDCS) are still largely unknown. To provide novel insight into the neurobiology of tDCS, stimulation was applied concurrently with Magnetoencephalography (MEG). This occurred while participants completed a visuomotor task before, during and after stimulation. Motor beta band (15–30 Hz) and visual gamma band (30–80 Hz) responses were localised using Synthetic Aperture Magnetometry (SAM). The resulting evoked and induced brain oscillatory responses were analysed. A significant reduction of average power was observed in the visual gamma band for anodal compared to sham stimulation. The magnitude of motor evoked responses was also demonstrated to be modulated by anodal tDCS. These results highlight that MEG can be used to draw inferences on the cortical mechanisms of DC stimulation.
College: College of Human and Health Sciences