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An acute session of motor imagery training induces use-dependent plasticity

Motor imagery, defined as the mental representation of an action without movement-related sensory inputs, is a well-known intervention to improve motor performance. In the current study, we tested whether use-dependent plasticity, a mechanism underlying motor learning, could be induced by an acute s...

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Autores principales: Ruffino, Célia, Gaveau, Jérémie, Papaxanthis, Charalambos, Lebon, Florent
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6934610/
https://www.ncbi.nlm.nih.gov/pubmed/31882851
http://dx.doi.org/10.1038/s41598-019-56628-z
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author Ruffino, Célia
Gaveau, Jérémie
Papaxanthis, Charalambos
Lebon, Florent
author_facet Ruffino, Célia
Gaveau, Jérémie
Papaxanthis, Charalambos
Lebon, Florent
author_sort Ruffino, Célia
collection PubMed
description Motor imagery, defined as the mental representation of an action without movement-related sensory inputs, is a well-known intervention to improve motor performance. In the current study, we tested whether use-dependent plasticity, a mechanism underlying motor learning, could be induced by an acute session of motor imagery. By means of transcranial magnetic stimulation (TMS) over the left primary motor cortex, we evoked isolated thumb movements in the right hand and assessed corticospinal excitability in the flexor and extensor pollicis brevis muscles. We measured the mean TMS-induced movement direction before and after an acute session of motor imagery practice. In a first experiment, participants of the imagery group were instructed to repeatedly imagine their thumb moving in a direction deviated by 90° from the pre-test movement. This group, but not the control group, deviated the post-training TMS-induced movements toward the training target direction (+44° ± 62° and −1° ± 23°, respectively). Interestingly, the deviation magnitude was driven by the corticospinal excitability increase in the agonist muscle. In a second experiment, we found that post-training TMS-induced movements were proportionally deviated toward the trained direction and returned to baseline 30 minutes after the motor imagery training. These findings suggest that motor imagery induces use-dependent plasticity and, this neural process is accompanied by corticospinal excitability increase in the agonist muscle.
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spelling pubmed-69346102019-12-30 An acute session of motor imagery training induces use-dependent plasticity Ruffino, Célia Gaveau, Jérémie Papaxanthis, Charalambos Lebon, Florent Sci Rep Article Motor imagery, defined as the mental representation of an action without movement-related sensory inputs, is a well-known intervention to improve motor performance. In the current study, we tested whether use-dependent plasticity, a mechanism underlying motor learning, could be induced by an acute session of motor imagery. By means of transcranial magnetic stimulation (TMS) over the left primary motor cortex, we evoked isolated thumb movements in the right hand and assessed corticospinal excitability in the flexor and extensor pollicis brevis muscles. We measured the mean TMS-induced movement direction before and after an acute session of motor imagery practice. In a first experiment, participants of the imagery group were instructed to repeatedly imagine their thumb moving in a direction deviated by 90° from the pre-test movement. This group, but not the control group, deviated the post-training TMS-induced movements toward the training target direction (+44° ± 62° and −1° ± 23°, respectively). Interestingly, the deviation magnitude was driven by the corticospinal excitability increase in the agonist muscle. In a second experiment, we found that post-training TMS-induced movements were proportionally deviated toward the trained direction and returned to baseline 30 minutes after the motor imagery training. These findings suggest that motor imagery induces use-dependent plasticity and, this neural process is accompanied by corticospinal excitability increase in the agonist muscle. Nature Publishing Group UK 2019-12-27 /pmc/articles/PMC6934610/ /pubmed/31882851 http://dx.doi.org/10.1038/s41598-019-56628-z Text en © The Author(s) 2019 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Ruffino, Célia
Gaveau, Jérémie
Papaxanthis, Charalambos
Lebon, Florent
An acute session of motor imagery training induces use-dependent plasticity
title An acute session of motor imagery training induces use-dependent plasticity
title_full An acute session of motor imagery training induces use-dependent plasticity
title_fullStr An acute session of motor imagery training induces use-dependent plasticity
title_full_unstemmed An acute session of motor imagery training induces use-dependent plasticity
title_short An acute session of motor imagery training induces use-dependent plasticity
title_sort acute session of motor imagery training induces use-dependent plasticity
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6934610/
https://www.ncbi.nlm.nih.gov/pubmed/31882851
http://dx.doi.org/10.1038/s41598-019-56628-z
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