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Merged swing-muscle synergies and their relation to walking characteristics in subacute post-stroke patients: An observational study
In post-stroke patients, muscle synergy (the coordination of motor modules during walking) is impaired. In some patients, the muscle synergy termed module 1 (hip/knee extensors) is merged with module 2 (ankle plantar flexors), and in other cases, module 1 is merged with module 4 (knee flexors). Howe...
Autores principales: | , , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Public Library of Science
2022
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8815905/ https://www.ncbi.nlm.nih.gov/pubmed/35120178 http://dx.doi.org/10.1371/journal.pone.0263613 |
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author | Mizuta, Naomichi Hasui, Naruhito Nishi, Yuki Higa, Yasutaka Matsunaga, Ayaka Deguchi, Junji Yamamoto, Yasutada Nakatani, Tomoki Taguchi, Junji Morioka, Shu |
author_facet | Mizuta, Naomichi Hasui, Naruhito Nishi, Yuki Higa, Yasutaka Matsunaga, Ayaka Deguchi, Junji Yamamoto, Yasutada Nakatani, Tomoki Taguchi, Junji Morioka, Shu |
author_sort | Mizuta, Naomichi |
collection | PubMed |
description | In post-stroke patients, muscle synergy (the coordination of motor modules during walking) is impaired. In some patients, the muscle synergy termed module 1 (hip/knee extensors) is merged with module 2 (ankle plantar flexors), and in other cases, module 1 is merged with module 4 (knee flexors). However, post-stroke individuals with a merging pattern of module 3 (hip flexor and ankle dorsiflexor) and module 4, which is the swing-muscle synergy, have not been reported. This study aimed to determine the muscle-synergy merging subtypes of post-stroke during comfortable walking speed (cws). We also examined the effect of experimental lower-limb angle modulation on the muscle synergy patterns of walking in each subtype. Forty-one participants were assessed under three conditions: cws, long stepping on the paretic side (p-long), and long stepping on the non-paretic side (np-long). Lower-limb flexion and extension angles and the electromyogram were measured during walking. Subtype classification was based on the merging pattern of the muscle synergies, and we examined the effect of different lower-limb angles on the muscle synergies. We identified three merging subtypes: module 1 with module 2 (subtype 1), module 1 with module 4 (subtype 2), and module 3 with module 4 (subtype 3). In the cws condition, the lower-limb flexion angle was reduced in subtype 3, and the lower-limb extension angle was decreased in subtype 1. A more complex muscle synergy was observed only in subtype 3 in the p-long condition versus cws (p = 0.036). This subtype classification of walking impairments based on the merging pattern of the muscle synergies could be useful for the selection of a rehabilitation strategy according to the individual’s particular neurological condition. Rehabilitation with increased lower-limb flexion may be effective for the training of patients with merging of modules 3 and 4 in comfortable walking. |
format | Online Article Text |
id | pubmed-8815905 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | Public Library of Science |
record_format | MEDLINE/PubMed |
spelling | pubmed-88159052022-02-05 Merged swing-muscle synergies and their relation to walking characteristics in subacute post-stroke patients: An observational study Mizuta, Naomichi Hasui, Naruhito Nishi, Yuki Higa, Yasutaka Matsunaga, Ayaka Deguchi, Junji Yamamoto, Yasutada Nakatani, Tomoki Taguchi, Junji Morioka, Shu PLoS One Research Article In post-stroke patients, muscle synergy (the coordination of motor modules during walking) is impaired. In some patients, the muscle synergy termed module 1 (hip/knee extensors) is merged with module 2 (ankle plantar flexors), and in other cases, module 1 is merged with module 4 (knee flexors). However, post-stroke individuals with a merging pattern of module 3 (hip flexor and ankle dorsiflexor) and module 4, which is the swing-muscle synergy, have not been reported. This study aimed to determine the muscle-synergy merging subtypes of post-stroke during comfortable walking speed (cws). We also examined the effect of experimental lower-limb angle modulation on the muscle synergy patterns of walking in each subtype. Forty-one participants were assessed under three conditions: cws, long stepping on the paretic side (p-long), and long stepping on the non-paretic side (np-long). Lower-limb flexion and extension angles and the electromyogram were measured during walking. Subtype classification was based on the merging pattern of the muscle synergies, and we examined the effect of different lower-limb angles on the muscle synergies. We identified three merging subtypes: module 1 with module 2 (subtype 1), module 1 with module 4 (subtype 2), and module 3 with module 4 (subtype 3). In the cws condition, the lower-limb flexion angle was reduced in subtype 3, and the lower-limb extension angle was decreased in subtype 1. A more complex muscle synergy was observed only in subtype 3 in the p-long condition versus cws (p = 0.036). This subtype classification of walking impairments based on the merging pattern of the muscle synergies could be useful for the selection of a rehabilitation strategy according to the individual’s particular neurological condition. Rehabilitation with increased lower-limb flexion may be effective for the training of patients with merging of modules 3 and 4 in comfortable walking. Public Library of Science 2022-02-04 /pmc/articles/PMC8815905/ /pubmed/35120178 http://dx.doi.org/10.1371/journal.pone.0263613 Text en © 2022 Mizuta 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 Mizuta, Naomichi Hasui, Naruhito Nishi, Yuki Higa, Yasutaka Matsunaga, Ayaka Deguchi, Junji Yamamoto, Yasutada Nakatani, Tomoki Taguchi, Junji Morioka, Shu Merged swing-muscle synergies and their relation to walking characteristics in subacute post-stroke patients: An observational study |
title | Merged swing-muscle synergies and their relation to walking characteristics in subacute post-stroke patients: An observational study |
title_full | Merged swing-muscle synergies and their relation to walking characteristics in subacute post-stroke patients: An observational study |
title_fullStr | Merged swing-muscle synergies and their relation to walking characteristics in subacute post-stroke patients: An observational study |
title_full_unstemmed | Merged swing-muscle synergies and their relation to walking characteristics in subacute post-stroke patients: An observational study |
title_short | Merged swing-muscle synergies and their relation to walking characteristics in subacute post-stroke patients: An observational study |
title_sort | merged swing-muscle synergies and their relation to walking characteristics in subacute post-stroke patients: an observational study |
topic | Research Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8815905/ https://www.ncbi.nlm.nih.gov/pubmed/35120178 http://dx.doi.org/10.1371/journal.pone.0263613 |
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