Losing one's hand: visual-proprioceptive conflict affects touch perception.

<h4>Background</h4>While the sense of bodily ownership has now been widely investigated through the rubber hand illusion (RHI), very little is known about the sense of disownership. It has been hypothesized that the RHI also affects the ownership feelings towards the participant's o...

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Autores principales:	Alessia Folegatti, Frédérique de Vignemont, Francesco Pavani, Yves Rossetti, Alessandro Farnè
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2009
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/e8e950cc35ae4ae28ff5025eacc5b333
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id	oai:doaj.org-article:e8e950cc35ae4ae28ff5025eacc5b333
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spelling	oai:doaj.org-article:e8e950cc35ae4ae28ff5025eacc5b3332021-11-25T06:20:32ZLosing one's hand: visual-proprioceptive conflict affects touch perception.1932-620310.1371/journal.pone.0006920https://doaj.org/article/e8e950cc35ae4ae28ff5025eacc5b3332009-09-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/19738900/?tool=EBIhttps://doaj.org/toc/1932-6203<h4>Background</h4>While the sense of bodily ownership has now been widely investigated through the rubber hand illusion (RHI), very little is known about the sense of disownership. It has been hypothesized that the RHI also affects the ownership feelings towards the participant's own hand, as if the rubber hand replaced the participant's actual hand. Somatosensory changes observed in the participants' hand while experiencing the RHI have been taken as evidence for disownership of their real hand. Here we propose a theoretical framework to disambiguate whether such somatosensory changes are to be ascribed to the disownership of the real hand or rather to the anomalous visuo-proprioceptive conflict experienced by the participant during the RHI.<h4>Methodology/principal findings</h4>In experiment 1, reaction times (RTs) to tactile stimuli delivered to the participants' hand slowed down following the establishment of the RHI. In experiment 2, the misalignment of visual and proprioceptive inputs was obtained via prismatic displacement, a situation in which ownership of the seen hand was doubtless. This condition slowed down the participants' tactile RTs. Thus, similar effects on touch perception emerged following RHI and prismatic displacement. Both manipulations also induced a proprioceptive drift, toward the fake hand in the first experiment and toward the visual position of the participants' hand in the second experiment.<h4>Conclusions/significance</h4>These findings reveal that somatosensory alterations in the experimental hand resulting from the RHI result from cross-modal mismatch between the seen and felt position of the hand. As such, they are not necessarily a signature of disownership.Alessia FolegattiFrédérique de VignemontFrancesco PavaniYves RossettiAlessandro FarnèPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 4, Iss 9, p e6920 (2009)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Alessia Folegatti Frédérique de Vignemont Francesco Pavani Yves Rossetti Alessandro Farnè Losing one's hand: visual-proprioceptive conflict affects touch perception.
description	<h4>Background</h4>While the sense of bodily ownership has now been widely investigated through the rubber hand illusion (RHI), very little is known about the sense of disownership. It has been hypothesized that the RHI also affects the ownership feelings towards the participant's own hand, as if the rubber hand replaced the participant's actual hand. Somatosensory changes observed in the participants' hand while experiencing the RHI have been taken as evidence for disownership of their real hand. Here we propose a theoretical framework to disambiguate whether such somatosensory changes are to be ascribed to the disownership of the real hand or rather to the anomalous visuo-proprioceptive conflict experienced by the participant during the RHI.<h4>Methodology/principal findings</h4>In experiment 1, reaction times (RTs) to tactile stimuli delivered to the participants' hand slowed down following the establishment of the RHI. In experiment 2, the misalignment of visual and proprioceptive inputs was obtained via prismatic displacement, a situation in which ownership of the seen hand was doubtless. This condition slowed down the participants' tactile RTs. Thus, similar effects on touch perception emerged following RHI and prismatic displacement. Both manipulations also induced a proprioceptive drift, toward the fake hand in the first experiment and toward the visual position of the participants' hand in the second experiment.<h4>Conclusions/significance</h4>These findings reveal that somatosensory alterations in the experimental hand resulting from the RHI result from cross-modal mismatch between the seen and felt position of the hand. As such, they are not necessarily a signature of disownership.
format	article
author	Alessia Folegatti Frédérique de Vignemont Francesco Pavani Yves Rossetti Alessandro Farnè
author_facet	Alessia Folegatti Frédérique de Vignemont Francesco Pavani Yves Rossetti Alessandro Farnè
author_sort	Alessia Folegatti
title	Losing one's hand: visual-proprioceptive conflict affects touch perception.
title_short	Losing one's hand: visual-proprioceptive conflict affects touch perception.
title_full	Losing one's hand: visual-proprioceptive conflict affects touch perception.
title_fullStr	Losing one's hand: visual-proprioceptive conflict affects touch perception.
title_full_unstemmed	Losing one's hand: visual-proprioceptive conflict affects touch perception.
title_sort	losing one's hand: visual-proprioceptive conflict affects touch perception.
publisher	Public Library of Science (PLoS)
publishDate	2009
url	https://doaj.org/article/e8e950cc35ae4ae28ff5025eacc5b333
work_keys_str_mv	AT alessiafolegatti losingoneshandvisualproprioceptiveconflictaffectstouchperception AT frederiquedevignemont losingoneshandvisualproprioceptiveconflictaffectstouchperception AT francescopavani losingoneshandvisualproprioceptiveconflictaffectstouchperception AT yvesrossetti losingoneshandvisualproprioceptiveconflictaffectstouchperception AT alessandrofarne losingoneshandvisualproprioceptiveconflictaffectstouchperception
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Losing one's hand: visual-proprioceptive conflict affects touch perception.

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