Somatosensory cortical representation of the body size.
TMS
body representation
body size
inferior parietal lobule
somatosensory cortex
Journal
Human brain mapping
ISSN: 1097-0193
Titre abrégé: Hum Brain Mapp
Pays: United States
ID NLM: 9419065
Informations de publication
Date de publication:
15 08 2019
15 08 2019
Historique:
received:
14
01
2019
revised:
12
04
2019
accepted:
24
04
2019
pubmed:
6
5
2019
medline:
3
4
2020
entrez:
7
5
2019
Statut:
ppublish
Résumé
The knowledge of the size of our own body parts is essential for accurately moving in space and efficiently interact with objects. A distorted perceptual representation of the body size often represents a core diagnostic criterion for some psychopathological conditions. The metric representation of the body was shown to depend on somatosensory afferences: local deafferentation indeed causes a perceptual distortion of the size of the anesthetized body part. A specular effect can be induced by altering the cortical map of body parts in the primary somatosensory cortex. Indeed, the present study demonstrates, in healthy adult participants, that repetitive Transcranial Magnetic Stimulation to the somatosensory cortical map of the hand in both hemispheres causes a perceptual distortion (i.e., an overestimation) of the size of the participants' own hand (Experiments 1-3), which does not involve other body parts (i.e., the foot, Experiment 2). Instead, the stimulation of the inferior parietal lobule of both hemispheres does not affect the perception of the own body size (Experiment 4). These results highlight the role of the primary somatosensory cortex in the building up and updating of the metric of body parts: somatosensory cortical activity not only shapes our somatosensation, it also affects how we perceive the dimension of our body.
Identifiants
pubmed: 31056809
doi: 10.1002/hbm.24614
pmc: PMC6865590
doi:
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
3534-3547Subventions
Organisme : University of Milano Bicocca
ID : 2016-ATE-0281
Pays : International
Informations de copyright
© 2019 Wiley Periodicals, Inc.
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