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Visual area V5/hMT+ contributes to perception of tactile motion direction: a TMS study

Amemiya, Tomohiro, Beck, Brianna, Walsh, Vincent, Gomi, Hiroaki, Haggard, Patrick (2017) Visual area V5/hMT+ contributes to perception of tactile motion direction: a TMS study. Scientific Reports, 7 (1). ISSN 2045-2322. (doi:10.1038/srep40937)

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Human imaging studies have reported activations associated with tactile motion perception in visual motion area V5/hMT+, primary somatosensory cortex (SI) and posterior parietal cortex (PPC; Brodmann areas 7/40). However, such studies cannot establish whether these areas are causally involved in tactile motion perception. We delivered double-pulse transcranial magnetic stimulation (TMS) while moving a single tactile point across the fingertip, and used signal detection theory to quantify perceptual sensitivity to motion direction. TMS over both SI and V5/hMT+, but not the PPC site, significantly reduced tactile direction discrimination. Our results show that V5/hMT+ plays a causal role in tactile direction processing, and strengthen the case for V5/hMT+ serving multimodal motion perception. Further, our findings are consistent with a serial model of cortical tactile processing, in which higher-order perceptual processing depends upon information received from SI. By contrast, our results do not provide clear evidence that the PPC site we targeted (Brodmann areas 7/40) contributes to tactile direction perception.

Item Type: Article
DOI/Identification number: 10.1038/srep40937
Divisions: Faculties > Social Sciences > School of Psychology
Depositing User: Brianna Beck
Date Deposited: 03 Dec 2018 12:57 UTC
Last Modified: 14 Jan 2020 15:58 UTC
Resource URI: (The current URI for this page, for reference purposes)
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