Stroke impairs the control of isometric forces and muscle activations in the ipsilesional arm

Abstract Stroke often impairs the control of the contralesional arm, thus most survivors rely on the ipsilesional arm to perform daily living activities that require an efficient control of movements and forces. Whereas the ipsilesional arm is often called ‘unaffected’ or ‘unimpaired’, several studi...

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Autores principales:	Laura Pellegrino, Martina Coscia, Psiche Giannoni, Lucio Marinelli, Maura Casadio
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/f28328abf0c846bb9f0c6ea5132c8c86
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spelling	oai:doaj.org-article:f28328abf0c846bb9f0c6ea5132c8c862021-12-02T17:23:39ZStroke impairs the control of isometric forces and muscle activations in the ipsilesional arm10.1038/s41598-021-96329-02045-2322https://doaj.org/article/f28328abf0c846bb9f0c6ea5132c8c862021-09-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-96329-0https://doaj.org/toc/2045-2322Abstract Stroke often impairs the control of the contralesional arm, thus most survivors rely on the ipsilesional arm to perform daily living activities that require an efficient control of movements and forces. Whereas the ipsilesional arm is often called ‘unaffected’ or ‘unimpaired’, several studies suggested that during dynamic tasks its kinematics and joint torques are altered. Is stroke also affecting the ability of the ipsilesional arm to produce isometric force, as when pushing or pulling a handle? Here, we address this question by analyzing behavioral performance and muscles’ activity when subjects applied an isometric force of 10 N in eight coplanar directions. We found that stroke affected the ability to apply well-controlled isometric forces with the ipsilesional arm, although to a minor extent compared to the contralesional arm. The spinal maps, the analysis of single muscle activities and the organization of muscle synergies highlighted that this effect was mainly associated with abnormal activity of proximal muscles with respect to matched controls, especially when pushing or pulling in lateral directions.Laura PellegrinoMartina CosciaPsiche GiannoniLucio MarinelliMaura CasadioNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-18 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Laura Pellegrino Martina Coscia Psiche Giannoni Lucio Marinelli Maura Casadio Stroke impairs the control of isometric forces and muscle activations in the ipsilesional arm
description	Abstract Stroke often impairs the control of the contralesional arm, thus most survivors rely on the ipsilesional arm to perform daily living activities that require an efficient control of movements and forces. Whereas the ipsilesional arm is often called ‘unaffected’ or ‘unimpaired’, several studies suggested that during dynamic tasks its kinematics and joint torques are altered. Is stroke also affecting the ability of the ipsilesional arm to produce isometric force, as when pushing or pulling a handle? Here, we address this question by analyzing behavioral performance and muscles’ activity when subjects applied an isometric force of 10 N in eight coplanar directions. We found that stroke affected the ability to apply well-controlled isometric forces with the ipsilesional arm, although to a minor extent compared to the contralesional arm. The spinal maps, the analysis of single muscle activities and the organization of muscle synergies highlighted that this effect was mainly associated with abnormal activity of proximal muscles with respect to matched controls, especially when pushing or pulling in lateral directions.
format	article
author	Laura Pellegrino Martina Coscia Psiche Giannoni Lucio Marinelli Maura Casadio
author_facet	Laura Pellegrino Martina Coscia Psiche Giannoni Lucio Marinelli Maura Casadio
author_sort	Laura Pellegrino
title	Stroke impairs the control of isometric forces and muscle activations in the ipsilesional arm
title_short	Stroke impairs the control of isometric forces and muscle activations in the ipsilesional arm
title_full	Stroke impairs the control of isometric forces and muscle activations in the ipsilesional arm
title_fullStr	Stroke impairs the control of isometric forces and muscle activations in the ipsilesional arm
title_full_unstemmed	Stroke impairs the control of isometric forces and muscle activations in the ipsilesional arm
title_sort	stroke impairs the control of isometric forces and muscle activations in the ipsilesional arm
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/f28328abf0c846bb9f0c6ea5132c8c86
work_keys_str_mv	AT laurapellegrino strokeimpairsthecontrolofisometricforcesandmuscleactivationsintheipsilesionalarm AT martinacoscia strokeimpairsthecontrolofisometricforcesandmuscleactivationsintheipsilesionalarm AT psichegiannoni strokeimpairsthecontrolofisometricforcesandmuscleactivationsintheipsilesionalarm AT luciomarinelli strokeimpairsthecontrolofisometricforcesandmuscleactivationsintheipsilesionalarm AT mauracasadio strokeimpairsthecontrolofisometricforcesandmuscleactivationsintheipsilesionalarm
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Stroke impairs the control of isometric forces and muscle activations in the ipsilesional arm

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