Cargando…

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...

Descripción completa

Detalles Bibliográficos
Autores principales: Reader, Arran T., Coppi, Sara, Trifonova, Victoria S., Ehrsson, H. Henrik
Formato: Online Artículo Texto
Lenguaje:English
Publicado: John Wiley and Sons Inc. 2023
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
_version_ 1785119780305371136
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
work_keys_str_mv AT readerarrant noreductioninmotorevokedpotentialamplitudeduringtherubberhandillusion
AT coppisara noreductioninmotorevokedpotentialamplitudeduringtherubberhandillusion
AT trifonovavictorias noreductioninmotorevokedpotentialamplitudeduringtherubberhandillusion
AT ehrssonhhenrik noreductioninmotorevokedpotentialamplitudeduringtherubberhandillusion