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Title

Replicating the facilitatory effects of transcranial random noise stimulation on motion processing: A registered reportuse asterix (*) to get italics

Authors

Mica B. Carroll*, Grace Edwards*, Chris I. BakerPlease use the format "First name initials family name" as in "Marie S. Curie, Niels H. D. Bohr, Albert Einstein, John R. R. Tolkien, Donna T. Strickland"

Year

2022

Picture

Abstract

<p>Non-invasive brain stimulation (NIBS) techniques have the potential to demonstrate the causal impact of targeted brain regions on specific behaviors, and to regulate or facilitate behavior in clinical applications. Transcranial random noise stimulation (tRNS) is one form of transcranial electric stimulation (tES) in which an alternating current is passed between electrodes at random frequencies. High-frequency tRNS (hf-tRNS) is thought to enhance excitability and has been reported to have facilitatory effects on behavior in healthy and clinical populations. Due to the potential application of tRNS, clear demonstrations of the efficacy and replicability of stimulation are critical. Here, we propose to replicate the facilitatory effect of hf-tRNS over the human middle temporal complex (hMT+) on contralateral motion processing, initially demonstrated by Ghin et al. (2018). The improvement in performance was specific to global motion processing in the visual field contralateral to stimulation. The motivation to replicate this effect is reinforced by the well-supported hypothesis that hMT+ is critical for contralateral global motion processing. We hypothesize that we will replicate the facilitatory effect of hf-tRNS to hMT+ on contralateral global motion processing in comparison to sham stimulation. Furthermore, we extend the original findings with the addition of a within-subjects comparison between stimulation to target region hMT+ and an active control, the forehead. We expect to find a significant contralateral stimulation effect for hMT+ only.</p>

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Keywords

tRNS; hMT+; facilitation; maximum likelihood procedure; motion coherence; vision

Methods that require specific expertise (optional)

NonePlease indicate the methods that may require specialised expertise during the peer review process (use a comma to separate various required expertises).

Thematic fields

Life Sciences

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Submission date

2022-06-02 21:25:02

Recommender

Robert McIntosh

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