Dawood, A.B., Dickinson, A., Aytemur, A. et al. (2 more authors) (2022) No effects of transcranial direct current stimulation on visual evoked potential and peak gamma frequency. Cognitive Processing, 23 (2). pp. 235-254. ISSN 1612-4782
Abstract
Evidence suggests that the visual evoked potential (VEP) and gamma oscillations elicited by visual stimuli reflect the balance of excitatory and inhibitory (E-I) cortical processes. As tDCS has been shown to modulate E–I balance, the current study investigated whether amplitudes of VEP components (N1 and P2) and peak gamma frequency are modulated by transcranial direct current stimulation (tDCS). Healthy adults underwent two electroencephalography (EEG) recordings while viewing stimuli designed to elicit a robust visual response. Between the two recordings, participants were randomly assigned to three tDCS conditions (anodal-, cathodal-, and sham-tDCS) or received no-tDCS. tDCS electrodes were placed over the occipital cortex (Oz) and the left cheek with an intensity of 2 mA for 10 min. Data of 39 participants were analysed for VEP amplitudes and peak gamma frequency using mixed-model ANOVAs. The results showed no main effects of tDCS in any metric. Possible explanations for the absence of tDCS effects are discussed.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2022 Marta Olivetti Belardinelli and Springer-Verlag GmbH Germany, part of Springer Nature. This is an author-produced version of a paper subsequently published in Cognitive Processing. Uploaded in accordance with the publisher's self-archiving policy. |
Keywords: | Excitation-inhibition balance; Neuromodulation; tDCS; EEG; Visual evoked potential; Peak gamma frequency |
Dates: |
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Institution: | The University of Sheffield |
Academic Units: | The University of Sheffield > Faculty of Science (Sheffield) > Department of Psychology (Sheffield) |
Depositing User: | Symplectic Sheffield |
Date Deposited: | 06 May 2022 05:59 |
Last Modified: | 31 Jan 2023 01:13 |
Status: | Published |
Publisher: | Springer Nature |
Refereed: | Yes |
Identification Number: | 10.1007/s10339-022-01076-3 |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:186466 |