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Accuracy of older adults in judging self-generated elbow torques during multi-joint isometric tasks

Successful execution of daily activities requires accurate perception of the torques one generates about multiple joints. Even so, previous studies are mostly limited to an individual’s perception when torques are generated about a single joint. Consequently, this study investigates how accurately i...

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Autores principales: Cai, Ninghe M., Dewald, Julius P. A., Gurari, Netta
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7400576/
https://www.ncbi.nlm.nih.gov/pubmed/32747667
http://dx.doi.org/10.1038/s41598-020-69470-5
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author Cai, Ninghe M.
Dewald, Julius P. A.
Gurari, Netta
author_facet Cai, Ninghe M.
Dewald, Julius P. A.
Gurari, Netta
author_sort Cai, Ninghe M.
collection PubMed
description Successful execution of daily activities requires accurate perception of the torques one generates about multiple joints. Even so, previous studies are mostly limited to an individual’s perception when torques are generated about a single joint. Consequently, this study investigates how accurately individuals judge torques at their arm during a multi-joint task. The accuracy of fifteen right-hand dominant participants (age: 60 ± 10 years) in matching isometric elbow torques, within the same arm, was quantified during single- and/or multi-joint tasks. Participants generated and matched elbow torques when the shoulder was: (1) not abducted (single-to-single-joint), (2) abducted (multi-to-multi-joint), and (3) abducted and then not abducted (multi-to-single-joint). The constant error for the multi-to-single-joint condition (dominant: 6.9 ± 5.9 Nm, non-dominant: 6.0 ± 5.5 Nm) was greater than that for the single-to-single-joint condition (dominant: 2.7 ± 3.1 Nm, non-dominant: 3.4 ± 2.8 Nm) (p < 0.001) and multi-to-multi-joint condition (dominant: 3.0 ± 2.8 Nm, non-dominant: 3.9 ± 2.7 Nm) (p < 0.001). The constant error for the multi-to-multi-joint condition did not significantly differ from that of the single-to-single-joint condition (p [Formula: see text] 0.780). Findings indicate that in older adults the perception of a self-generated torque during a 2-degree-of-freedom (DOF), multi-joint task is largely influenced by the motor commands associated with the 2-DOF task and is not specific to the DOF at each joint.
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spelling pubmed-74005762020-08-04 Accuracy of older adults in judging self-generated elbow torques during multi-joint isometric tasks Cai, Ninghe M. Dewald, Julius P. A. Gurari, Netta Sci Rep Article Successful execution of daily activities requires accurate perception of the torques one generates about multiple joints. Even so, previous studies are mostly limited to an individual’s perception when torques are generated about a single joint. Consequently, this study investigates how accurately individuals judge torques at their arm during a multi-joint task. The accuracy of fifteen right-hand dominant participants (age: 60 ± 10 years) in matching isometric elbow torques, within the same arm, was quantified during single- and/or multi-joint tasks. Participants generated and matched elbow torques when the shoulder was: (1) not abducted (single-to-single-joint), (2) abducted (multi-to-multi-joint), and (3) abducted and then not abducted (multi-to-single-joint). The constant error for the multi-to-single-joint condition (dominant: 6.9 ± 5.9 Nm, non-dominant: 6.0 ± 5.5 Nm) was greater than that for the single-to-single-joint condition (dominant: 2.7 ± 3.1 Nm, non-dominant: 3.4 ± 2.8 Nm) (p < 0.001) and multi-to-multi-joint condition (dominant: 3.0 ± 2.8 Nm, non-dominant: 3.9 ± 2.7 Nm) (p < 0.001). The constant error for the multi-to-multi-joint condition did not significantly differ from that of the single-to-single-joint condition (p [Formula: see text] 0.780). Findings indicate that in older adults the perception of a self-generated torque during a 2-degree-of-freedom (DOF), multi-joint task is largely influenced by the motor commands associated with the 2-DOF task and is not specific to the DOF at each joint. Nature Publishing Group UK 2020-08-03 /pmc/articles/PMC7400576/ /pubmed/32747667 http://dx.doi.org/10.1038/s41598-020-69470-5 Text en © This is a U.S. Government work and not under copyright protection in the US; foreign copyright protection may apply 2020 https://creativecommons.org/licenses/by/4.0/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/ (https://creativecommons.org/licenses/by/4.0/) .
spellingShingle Article
Cai, Ninghe M.
Dewald, Julius P. A.
Gurari, Netta
Accuracy of older adults in judging self-generated elbow torques during multi-joint isometric tasks
title Accuracy of older adults in judging self-generated elbow torques during multi-joint isometric tasks
title_full Accuracy of older adults in judging self-generated elbow torques during multi-joint isometric tasks
title_fullStr Accuracy of older adults in judging self-generated elbow torques during multi-joint isometric tasks
title_full_unstemmed Accuracy of older adults in judging self-generated elbow torques during multi-joint isometric tasks
title_short Accuracy of older adults in judging self-generated elbow torques during multi-joint isometric tasks
title_sort accuracy of older adults in judging self-generated elbow torques during multi-joint isometric tasks
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7400576/
https://www.ncbi.nlm.nih.gov/pubmed/32747667
http://dx.doi.org/10.1038/s41598-020-69470-5
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