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Separability of Human Motor Memories during reaching adaptation with force cues

Judging by the breadth of our motor repertoire during daily activities, it is clear that learning different tasks is a hallmark of the human motor system. However, for reaching adaptation to different force fields, the conditions under which this is possible in laboratory settings have remained a ch...

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Detalles Bibliográficos
Autores principales: Crevecoeur, Frédéric, Mathew, James, Lefèvre, Philippe
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Public Library of Science 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9645664/
https://www.ncbi.nlm.nih.gov/pubmed/36306317
http://dx.doi.org/10.1371/journal.pcbi.1009966
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author Crevecoeur, Frédéric
Mathew, James
Lefèvre, Philippe
author_facet Crevecoeur, Frédéric
Mathew, James
Lefèvre, Philippe
author_sort Crevecoeur, Frédéric
collection PubMed
description Judging by the breadth of our motor repertoire during daily activities, it is clear that learning different tasks is a hallmark of the human motor system. However, for reaching adaptation to different force fields, the conditions under which this is possible in laboratory settings have remained a challenging question. Previous work has shown that independent movement representations or goals enabled dual adaptation. Considering the importance of force feedback during limb control, here we hypothesised that independent cues delivered by means of background loads could support simultaneous adaptation to various velocity-dependent force fields, for identical kinematic plan and movement goal. We demonstrate in a series of experiments that indeed healthy adults can adapt to opposite force fields, independently of the direction of the background force cue. However, when the cue and force field were in the same direction but differed by heir magnitude, the formation of different motor representations was still observed but the associated mechanism was subject to increased interference. Finally, we highlight that this paradigm allows dissociating trial-by-trial adaptation from online feedback adaptation, as these two mechanisms are associated with different time scales that can be identified reliably and reproduced in a computational model.
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spelling pubmed-96456642022-11-15 Separability of Human Motor Memories during reaching adaptation with force cues Crevecoeur, Frédéric Mathew, James Lefèvre, Philippe PLoS Comput Biol Research Article Judging by the breadth of our motor repertoire during daily activities, it is clear that learning different tasks is a hallmark of the human motor system. However, for reaching adaptation to different force fields, the conditions under which this is possible in laboratory settings have remained a challenging question. Previous work has shown that independent movement representations or goals enabled dual adaptation. Considering the importance of force feedback during limb control, here we hypothesised that independent cues delivered by means of background loads could support simultaneous adaptation to various velocity-dependent force fields, for identical kinematic plan and movement goal. We demonstrate in a series of experiments that indeed healthy adults can adapt to opposite force fields, independently of the direction of the background force cue. However, when the cue and force field were in the same direction but differed by heir magnitude, the formation of different motor representations was still observed but the associated mechanism was subject to increased interference. Finally, we highlight that this paradigm allows dissociating trial-by-trial adaptation from online feedback adaptation, as these two mechanisms are associated with different time scales that can be identified reliably and reproduced in a computational model. Public Library of Science 2022-10-28 /pmc/articles/PMC9645664/ /pubmed/36306317 http://dx.doi.org/10.1371/journal.pcbi.1009966 Text en © 2022 Crevecoeur et al https://creativecommons.org/licenses/by/4.0/This is an open access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
spellingShingle Research Article
Crevecoeur, Frédéric
Mathew, James
Lefèvre, Philippe
Separability of Human Motor Memories during reaching adaptation with force cues
title Separability of Human Motor Memories during reaching adaptation with force cues
title_full Separability of Human Motor Memories during reaching adaptation with force cues
title_fullStr Separability of Human Motor Memories during reaching adaptation with force cues
title_full_unstemmed Separability of Human Motor Memories during reaching adaptation with force cues
title_short Separability of Human Motor Memories during reaching adaptation with force cues
title_sort separability of human motor memories during reaching adaptation with force cues
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9645664/
https://www.ncbi.nlm.nih.gov/pubmed/36306317
http://dx.doi.org/10.1371/journal.pcbi.1009966
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