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No reduction in motor‐evoked potential amplitude during the rubber hand illusion
INTRODUCTION: In the rubber hand illusion (RHI), touches are applied to a fake hand at the same time as touches are applied to a participant's real hand that is hidden in a congruent position. Synchronous (but not asynchronous) tactile stimulation of the two hands may induce the sensation that...
Autores principales: | , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
John Wiley and Sons Inc.
2023
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10570491/ https://www.ncbi.nlm.nih.gov/pubmed/37548563 http://dx.doi.org/10.1002/brb3.3211 |
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author | Reader, Arran T. Coppi, Sara Trifonova, Victoria S. Ehrsson, H. Henrik |
author_facet | Reader, Arran T. Coppi, Sara Trifonova, Victoria S. Ehrsson, H. Henrik |
author_sort | Reader, Arran T. |
collection | PubMed |
description | INTRODUCTION: In the rubber hand illusion (RHI), touches are applied to a fake hand at the same time as touches are applied to a participant's real hand that is hidden in a congruent position. Synchronous (but not asynchronous) tactile stimulation of the two hands may induce the sensation that the fake hand is the participant's own. As such, the illusion is commonly used to examine the sense of body ownership. Some studies indicate that in addition to the subjective experience of limb ownership reported by participants, the RHI can also reduce corticospinal excitability (e.g., as reflected in motor‐evoked potential [MEP] amplitude) and alter parietal‐motor cortical connectivity in passive participants. These findings have been taken to support a link between motor cortical processing and the subjective experience of body ownership. METHODS: In this study, we tried to replicate the reduction in MEP amplitude associated with the RHI and uncover the components of the illusion that might explain these changes. As such, we used single‐pulse transcranial magnetic stimulation to probe the excitability of the corticospinal motor system as participants experienced the RHI. RESULTS: Despite participants reporting the presence of the illusion and showing shifts in perceived real hand position towards the fake limb supporting its elicitation, we did not observe any associated reduction in MEP amplitude. CONCLUSION: We conclude that a reduction in MEP amplitude is not a reliable outcome of the RHI and argue that if such effects do occur, they are unlikely to be large or functionally relevant. |
format | Online Article Text |
id | pubmed-10570491 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2023 |
publisher | John Wiley and Sons Inc. |
record_format | MEDLINE/PubMed |
spelling | pubmed-105704912023-10-14 No reduction in motor‐evoked potential amplitude during the rubber hand illusion Reader, Arran T. Coppi, Sara Trifonova, Victoria S. Ehrsson, H. Henrik Brain Behav Original Articles INTRODUCTION: In the rubber hand illusion (RHI), touches are applied to a fake hand at the same time as touches are applied to a participant's real hand that is hidden in a congruent position. Synchronous (but not asynchronous) tactile stimulation of the two hands may induce the sensation that the fake hand is the participant's own. As such, the illusion is commonly used to examine the sense of body ownership. Some studies indicate that in addition to the subjective experience of limb ownership reported by participants, the RHI can also reduce corticospinal excitability (e.g., as reflected in motor‐evoked potential [MEP] amplitude) and alter parietal‐motor cortical connectivity in passive participants. These findings have been taken to support a link between motor cortical processing and the subjective experience of body ownership. METHODS: In this study, we tried to replicate the reduction in MEP amplitude associated with the RHI and uncover the components of the illusion that might explain these changes. As such, we used single‐pulse transcranial magnetic stimulation to probe the excitability of the corticospinal motor system as participants experienced the RHI. RESULTS: Despite participants reporting the presence of the illusion and showing shifts in perceived real hand position towards the fake limb supporting its elicitation, we did not observe any associated reduction in MEP amplitude. CONCLUSION: We conclude that a reduction in MEP amplitude is not a reliable outcome of the RHI and argue that if such effects do occur, they are unlikely to be large or functionally relevant. John Wiley and Sons Inc. 2023-08-07 /pmc/articles/PMC10570491/ /pubmed/37548563 http://dx.doi.org/10.1002/brb3.3211 Text en © 2023 The Authors. Brain and Behavior published by Wiley Periodicals LLC. https://creativecommons.org/licenses/by/4.0/This is an open access article under the terms of the http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. |
spellingShingle | Original Articles Reader, Arran T. Coppi, Sara Trifonova, Victoria S. Ehrsson, H. Henrik No reduction in motor‐evoked potential amplitude during the rubber hand illusion |
title | No reduction in motor‐evoked potential amplitude during the rubber hand illusion |
title_full | No reduction in motor‐evoked potential amplitude during the rubber hand illusion |
title_fullStr | No reduction in motor‐evoked potential amplitude during the rubber hand illusion |
title_full_unstemmed | No reduction in motor‐evoked potential amplitude during the rubber hand illusion |
title_short | No reduction in motor‐evoked potential amplitude during the rubber hand illusion |
title_sort | no reduction in motor‐evoked potential amplitude during the rubber hand illusion |
topic | Original Articles |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10570491/ https://www.ncbi.nlm.nih.gov/pubmed/37548563 http://dx.doi.org/10.1002/brb3.3211 |
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