Differential neural encoding of sensorimotor and visual body representations.

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State: Public
Version: Final published version
Serval ID
serval:BIB_461412B7F40A
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
Differential neural encoding of sensorimotor and visual body representations.
Journal
Scientific reports
Author(s)
Perruchoud D., Michels L., Piccirelli M., Gassert R., Ionta S.
ISSN
2045-2322 (Electronic)
ISSN-L
2045-2322
Publication state
Published
Issued date
24/11/2016
Peer-reviewed
Oui
Volume
6
Pages
37259
Language
english
Notes
Publication types: Journal Article ; Research Support, Non-U.S. Gov't
Publication Status: epublish
Abstract
Sensorimotor processing specifically impacts mental body representations. In particular, deteriorated somatosensory input (as after complete spinal cord injury) increases the relative weight of visual aspects of body parts' representations, leading to aberrancies in how images of body parts are mentally manipulated (e.g. mental rotation). This suggests that a sensorimotor or visual reference frame, respectively, can be relatively dominant in local (hands) versus global (full-body) bodily representations. On this basis, we hypothesized that the recruitment of a specific reference frame could be reflected in the activation of sensorimotor versus visual brain networks. To this aim, we directly compared the brain activity associated with mental rotation of hands versus full-bodies. Mental rotation of hands recruited more strongly the supplementary motor area, premotor cortex, and secondary somatosensory cortex. Conversely, mental rotation of full-bodies determined stronger activity in temporo-occipital regions, including the functionally-localized extrastriate body area. These results support that (1) sensorimotor and visual frames of reference are used to represent the body, (2) two distinct brain networks encode local or global bodily representations, and (3) the extrastriate body area is a multimodal region involved in body processing both at the perceptual and representational level.
Keywords
Adult, Body Image, Brain Mapping, Female, Hand/physiology, Humans, Magnetic Resonance Imaging, Male, Motor Cortex/physiology, Movement/physiology, Orientation, Spatial, Photic Stimulation, Reaction Time, Somatosensory Cortex/physiology, Young Adult
Pubmed
Web of science
Open Access
Yes
Create date
06/12/2016 21:17
Last modification date
20/08/2019 14:51
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