Influence of the Body Schema on Multisensory Integration: Evidence from the Mirror Box Illusion

Abstract When placing one hand on each side of a mirror and making synchronous bimanual movements, the mirror-reflected hand feels like one’s own hand that is hidden behind the mirror. We developed a novel mirror box illusion to investigate whether motoric, but not spatial, visuomotor congruence is...

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Autores principales:	Yuqi Liu, Jared Medina
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/284bebff765f45c5a2d9a5c02e447735
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spelling	oai:doaj.org-article:284bebff765f45c5a2d9a5c02e4477352021-12-02T16:08:22ZInfluence of the Body Schema on Multisensory Integration: Evidence from the Mirror Box Illusion10.1038/s41598-017-04797-02045-2322https://doaj.org/article/284bebff765f45c5a2d9a5c02e4477352017-07-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-04797-0https://doaj.org/toc/2045-2322Abstract When placing one hand on each side of a mirror and making synchronous bimanual movements, the mirror-reflected hand feels like one’s own hand that is hidden behind the mirror. We developed a novel mirror box illusion to investigate whether motoric, but not spatial, visuomotor congruence is sufficient for inducing multisensory integration, and importantly, if biomechanical constraints encoded in the body schema influence multisensory integration. Participants placed their hands in a mirror box in opposite postures (palm up, palm down), creating a conflict between visual and proprioceptive feedback for the hand behind the mirror. After synchronous bimanual hand movements in which the viewed and felt movements were motorically congruent but spatially in the opposite direction, participants felt that the hand behind the mirror rotated or completely flipped towards matching the hand reflection (illusory displacement), indicating facilitation of multisensory integration by motoric visuomotor congruence alone. Some wrist rotations are more difficult due to biomechanical constraints. We predicted that these biomechanical constraints would influence illusion effectiveness, even though the illusion does not involve actual limb movement. As predicted, illusory displacement increased as biomechanical constraints and angular disparity decreased, providing evidence that biomechanical constraints are processed in multisensory integration.Yuqi LiuJared MedinaNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-11 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Yuqi Liu Jared Medina Influence of the Body Schema on Multisensory Integration: Evidence from the Mirror Box Illusion
description	Abstract When placing one hand on each side of a mirror and making synchronous bimanual movements, the mirror-reflected hand feels like one’s own hand that is hidden behind the mirror. We developed a novel mirror box illusion to investigate whether motoric, but not spatial, visuomotor congruence is sufficient for inducing multisensory integration, and importantly, if biomechanical constraints encoded in the body schema influence multisensory integration. Participants placed their hands in a mirror box in opposite postures (palm up, palm down), creating a conflict between visual and proprioceptive feedback for the hand behind the mirror. After synchronous bimanual hand movements in which the viewed and felt movements were motorically congruent but spatially in the opposite direction, participants felt that the hand behind the mirror rotated or completely flipped towards matching the hand reflection (illusory displacement), indicating facilitation of multisensory integration by motoric visuomotor congruence alone. Some wrist rotations are more difficult due to biomechanical constraints. We predicted that these biomechanical constraints would influence illusion effectiveness, even though the illusion does not involve actual limb movement. As predicted, illusory displacement increased as biomechanical constraints and angular disparity decreased, providing evidence that biomechanical constraints are processed in multisensory integration.
format	article
author	Yuqi Liu Jared Medina
author_facet	Yuqi Liu Jared Medina
author_sort	Yuqi Liu
title	Influence of the Body Schema on Multisensory Integration: Evidence from the Mirror Box Illusion
title_short	Influence of the Body Schema on Multisensory Integration: Evidence from the Mirror Box Illusion
title_full	Influence of the Body Schema on Multisensory Integration: Evidence from the Mirror Box Illusion
title_fullStr	Influence of the Body Schema on Multisensory Integration: Evidence from the Mirror Box Illusion
title_full_unstemmed	Influence of the Body Schema on Multisensory Integration: Evidence from the Mirror Box Illusion
title_sort	influence of the body schema on multisensory integration: evidence from the mirror box illusion
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/284bebff765f45c5a2d9a5c02e447735
work_keys_str_mv	AT yuqiliu influenceofthebodyschemaonmultisensoryintegrationevidencefromthemirrorboxillusion AT jaredmedina influenceofthebodyschemaonmultisensoryintegrationevidencefromthemirrorboxillusion
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Influence of the Body Schema on Multisensory Integration: Evidence from the Mirror Box Illusion

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