Somatosensory-guided tool use modifies arm representation for action

Abstract Tool-use changes both peripersonal space and body representations, with several effects being nowadays termed tool embodiment. Since somatosensation was typically accompanied by vision in most previous tool use studies, whether somatosensation alone is sufficient for tool embodiment remains...

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Autores principales:	M. Martel, L. Cardinali, G. Bertonati, C. Jouffrais, L. Finos, A. Farnè, A. C. Roy
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2019
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/beb25c7d777444fda7bf5954075b1b9e
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id	oai:doaj.org-article:beb25c7d777444fda7bf5954075b1b9e
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spelling	oai:doaj.org-article:beb25c7d777444fda7bf5954075b1b9e2021-12-02T15:09:38ZSomatosensory-guided tool use modifies arm representation for action10.1038/s41598-019-41928-12045-2322https://doaj.org/article/beb25c7d777444fda7bf5954075b1b9e2019-04-01T00:00:00Zhttps://doi.org/10.1038/s41598-019-41928-1https://doaj.org/toc/2045-2322Abstract Tool-use changes both peripersonal space and body representations, with several effects being nowadays termed tool embodiment. Since somatosensation was typically accompanied by vision in most previous tool use studies, whether somatosensation alone is sufficient for tool embodiment remains unknown. Here we address this question via a task assessing arm length representation at an implicit level. Namely, we compared movement’s kinematics in blindfolded healthy participants when grasping an object before and after tool-use. Results showed longer latencies and smaller peaks in the arm transport component after tool-use, consistent with an increased length of arm representation. No changes were found in the hand grip component and correlations revealed similar kinematic signatures in naturally long-armed participants. Kinematics changes did not interact with target object position, further corroborating the finding that somatosensory-guided tool use may increase the represented size of the participants’ arm. Control experiments ruled out alternative interpretations based upon altered hand position sense. In addition, our findings indicate that tool-use effects are specific for the implicit level of arm representation, as no effect was observed on the explicit estimate of the forearm length. These findings demonstrate for the first time that somatosensation is sufficient for incorporating a tool that has never been seen, nor used before.M. MartelL. CardinaliG. BertonatiC. JouffraisL. FinosA. FarnèA. C. RoyNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 9, Iss 1, Pp 1-14 (2019)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q M. Martel L. Cardinali G. Bertonati C. Jouffrais L. Finos A. Farnè A. C. Roy Somatosensory-guided tool use modifies arm representation for action
description	Abstract Tool-use changes both peripersonal space and body representations, with several effects being nowadays termed tool embodiment. Since somatosensation was typically accompanied by vision in most previous tool use studies, whether somatosensation alone is sufficient for tool embodiment remains unknown. Here we address this question via a task assessing arm length representation at an implicit level. Namely, we compared movement’s kinematics in blindfolded healthy participants when grasping an object before and after tool-use. Results showed longer latencies and smaller peaks in the arm transport component after tool-use, consistent with an increased length of arm representation. No changes were found in the hand grip component and correlations revealed similar kinematic signatures in naturally long-armed participants. Kinematics changes did not interact with target object position, further corroborating the finding that somatosensory-guided tool use may increase the represented size of the participants’ arm. Control experiments ruled out alternative interpretations based upon altered hand position sense. In addition, our findings indicate that tool-use effects are specific for the implicit level of arm representation, as no effect was observed on the explicit estimate of the forearm length. These findings demonstrate for the first time that somatosensation is sufficient for incorporating a tool that has never been seen, nor used before.
format	article
author	M. Martel L. Cardinali G. Bertonati C. Jouffrais L. Finos A. Farnè A. C. Roy
author_facet	M. Martel L. Cardinali G. Bertonati C. Jouffrais L. Finos A. Farnè A. C. Roy
author_sort	M. Martel
title	Somatosensory-guided tool use modifies arm representation for action
title_short	Somatosensory-guided tool use modifies arm representation for action
title_full	Somatosensory-guided tool use modifies arm representation for action
title_fullStr	Somatosensory-guided tool use modifies arm representation for action
title_full_unstemmed	Somatosensory-guided tool use modifies arm representation for action
title_sort	somatosensory-guided tool use modifies arm representation for action
publisher	Nature Portfolio
publishDate	2019
url	https://doaj.org/article/beb25c7d777444fda7bf5954075b1b9e
work_keys_str_mv	AT mmartel somatosensoryguidedtoolusemodifiesarmrepresentationforaction AT lcardinali somatosensoryguidedtoolusemodifiesarmrepresentationforaction AT gbertonati somatosensoryguidedtoolusemodifiesarmrepresentationforaction AT cjouffrais somatosensoryguidedtoolusemodifiesarmrepresentationforaction AT lfinos somatosensoryguidedtoolusemodifiesarmrepresentationforaction AT afarne somatosensoryguidedtoolusemodifiesarmrepresentationforaction AT acroy somatosensoryguidedtoolusemodifiesarmrepresentationforaction
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Somatosensory-guided tool use modifies arm representation for action

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