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Body Ownership of Anatomically Implausible Hands in Virtual Reality

Manipulating sensory and motor cues can cause an illusionary perception of ownership of a fake body part. Presumably, the illusion can work as long as the false body part’s position and appearance are anatomically plausible. Here, we introduce an illusion that challenges past assumptions on body own...

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Autores principales: Yizhar, Or, Giron, Jonathan, Wenger, Mohr, Chetrit, Debbie, Ostrin, Gilad, Friedman, Doron, Amedi, Amir
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Frontiers Media S.A. 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8595134/
https://www.ncbi.nlm.nih.gov/pubmed/34803631
http://dx.doi.org/10.3389/fnhum.2021.713931
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author Yizhar, Or
Giron, Jonathan
Wenger, Mohr
Chetrit, Debbie
Ostrin, Gilad
Friedman, Doron
Amedi, Amir
author_facet Yizhar, Or
Giron, Jonathan
Wenger, Mohr
Chetrit, Debbie
Ostrin, Gilad
Friedman, Doron
Amedi, Amir
author_sort Yizhar, Or
collection PubMed
description Manipulating sensory and motor cues can cause an illusionary perception of ownership of a fake body part. Presumably, the illusion can work as long as the false body part’s position and appearance are anatomically plausible. Here, we introduce an illusion that challenges past assumptions on body ownership. We used virtual reality to switch and mirror participants’ views of their hands. When a participant moves their physical hand, they see the incongruent virtual hand moving. The result is an anatomically implausible configuration of the fake hand. Despite the hand switch, participants reported significant body ownership sensations over the virtual hands. In the first between-group experiment, we found that the strength of body ownership over the incongruent hands was similar to that of congruent hands. Whereas, in the second within-group experiment, anatomical incongruency significantly decreased body ownership. Still, participants reported significant body ownership sensations of the switched hands. Curiously, we found that perceived levels of agency mediate the effect of anatomical congruency on body ownership. These findings offer a fresh perspective on the relationship between anatomical plausibility and assumed body ownership. We propose that goal-directed and purposeful actions can override anatomical plausibility constraints and discuss this in the context of the immersive properties of virtual reality.
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spelling pubmed-85951342021-11-18 Body Ownership of Anatomically Implausible Hands in Virtual Reality Yizhar, Or Giron, Jonathan Wenger, Mohr Chetrit, Debbie Ostrin, Gilad Friedman, Doron Amedi, Amir Front Hum Neurosci Human Neuroscience Manipulating sensory and motor cues can cause an illusionary perception of ownership of a fake body part. Presumably, the illusion can work as long as the false body part’s position and appearance are anatomically plausible. Here, we introduce an illusion that challenges past assumptions on body ownership. We used virtual reality to switch and mirror participants’ views of their hands. When a participant moves their physical hand, they see the incongruent virtual hand moving. The result is an anatomically implausible configuration of the fake hand. Despite the hand switch, participants reported significant body ownership sensations over the virtual hands. In the first between-group experiment, we found that the strength of body ownership over the incongruent hands was similar to that of congruent hands. Whereas, in the second within-group experiment, anatomical incongruency significantly decreased body ownership. Still, participants reported significant body ownership sensations of the switched hands. Curiously, we found that perceived levels of agency mediate the effect of anatomical congruency on body ownership. These findings offer a fresh perspective on the relationship between anatomical plausibility and assumed body ownership. We propose that goal-directed and purposeful actions can override anatomical plausibility constraints and discuss this in the context of the immersive properties of virtual reality. Frontiers Media S.A. 2021-11-03 /pmc/articles/PMC8595134/ /pubmed/34803631 http://dx.doi.org/10.3389/fnhum.2021.713931 Text en Copyright © 2021 Yizhar, Giron, Wenger, Chetrit, Ostrin, Friedman and Amedi. https://creativecommons.org/licenses/by/4.0/This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
spellingShingle Human Neuroscience
Yizhar, Or
Giron, Jonathan
Wenger, Mohr
Chetrit, Debbie
Ostrin, Gilad
Friedman, Doron
Amedi, Amir
Body Ownership of Anatomically Implausible Hands in Virtual Reality
title Body Ownership of Anatomically Implausible Hands in Virtual Reality
title_full Body Ownership of Anatomically Implausible Hands in Virtual Reality
title_fullStr Body Ownership of Anatomically Implausible Hands in Virtual Reality
title_full_unstemmed Body Ownership of Anatomically Implausible Hands in Virtual Reality
title_short Body Ownership of Anatomically Implausible Hands in Virtual Reality
title_sort body ownership of anatomically implausible hands in virtual reality
topic Human Neuroscience
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8595134/
https://www.ncbi.nlm.nih.gov/pubmed/34803631
http://dx.doi.org/10.3389/fnhum.2021.713931
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