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Changes in muscle coordination patterns induced by exposure to a viscous force field

BACKGROUND: Robotic neurorehabilitation aims at promoting the recovery of lost function after neurological injury by leveraging strategies of motor learning. One important aspect of the rehabilitation process is the improvement of muscle coordination patterns, which can be drastically altered after...

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Detalles Bibliográficos
Autores principales: Oscari, Fabio, Finetto, Christian, Kautz, Steve A., Rosati, Giulio
Formato: Online Artículo Texto
Lenguaje:English
Publicado: BioMed Central 2016
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4910356/
https://www.ncbi.nlm.nih.gov/pubmed/27305944
http://dx.doi.org/10.1186/s12984-016-0164-3
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author Oscari, Fabio
Finetto, Christian
Kautz, Steve A.
Rosati, Giulio
author_facet Oscari, Fabio
Finetto, Christian
Kautz, Steve A.
Rosati, Giulio
author_sort Oscari, Fabio
collection PubMed
description BACKGROUND: Robotic neurorehabilitation aims at promoting the recovery of lost function after neurological injury by leveraging strategies of motor learning. One important aspect of the rehabilitation process is the improvement of muscle coordination patterns, which can be drastically altered after stroke. However, it is not fully understood if and how robotic therapy can address these deficits. The aim of our study was to find how muscle coordination, analyzed from the perspective of motor modules, could change during motor adaptation to a dynamic environment generated by a haptic interface. METHODS: In our experiment we employed the traditional paradigm of exposure to a viscous force field to subjects that grasped the handle of an actuated joystick during a reaching movement (participants moved directly forward and back by 30 cm). EMG signals of ten muscles of the tested arm were recorded. We extracted motor modules from the pooled EMG data of all subjects and analyzed the muscle coordination patterns. RESULTS: We found that the participants reacted by using a coordination strategy that could be explained by a change in the activation of motor modules used during free motion and by two complementary modules. These complementary modules aggregated changes in muscle coordination, and evolved throughout the experiment eventually maintaining a comparable structure until the late phase of re-adaptation. CONCLUSIONS: This result suggests that motor adaptation induced by the interaction with a robotic device can lead to changes in the muscle coordination patterns of the subject.
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spelling pubmed-49103562016-06-17 Changes in muscle coordination patterns induced by exposure to a viscous force field Oscari, Fabio Finetto, Christian Kautz, Steve A. Rosati, Giulio J Neuroeng Rehabil Research BACKGROUND: Robotic neurorehabilitation aims at promoting the recovery of lost function after neurological injury by leveraging strategies of motor learning. One important aspect of the rehabilitation process is the improvement of muscle coordination patterns, which can be drastically altered after stroke. However, it is not fully understood if and how robotic therapy can address these deficits. The aim of our study was to find how muscle coordination, analyzed from the perspective of motor modules, could change during motor adaptation to a dynamic environment generated by a haptic interface. METHODS: In our experiment we employed the traditional paradigm of exposure to a viscous force field to subjects that grasped the handle of an actuated joystick during a reaching movement (participants moved directly forward and back by 30 cm). EMG signals of ten muscles of the tested arm were recorded. We extracted motor modules from the pooled EMG data of all subjects and analyzed the muscle coordination patterns. RESULTS: We found that the participants reacted by using a coordination strategy that could be explained by a change in the activation of motor modules used during free motion and by two complementary modules. These complementary modules aggregated changes in muscle coordination, and evolved throughout the experiment eventually maintaining a comparable structure until the late phase of re-adaptation. CONCLUSIONS: This result suggests that motor adaptation induced by the interaction with a robotic device can lead to changes in the muscle coordination patterns of the subject. BioMed Central 2016-06-16 /pmc/articles/PMC4910356/ /pubmed/27305944 http://dx.doi.org/10.1186/s12984-016-0164-3 Text en © The Author(s) 2016 Open Access This article is distributed under the terms of the Creative Commons Attribution 4.0 International License(http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided 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 Creative Commons Public Domain Dedication waiver(http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.
spellingShingle Research
Oscari, Fabio
Finetto, Christian
Kautz, Steve A.
Rosati, Giulio
Changes in muscle coordination patterns induced by exposure to a viscous force field
title Changes in muscle coordination patterns induced by exposure to a viscous force field
title_full Changes in muscle coordination patterns induced by exposure to a viscous force field
title_fullStr Changes in muscle coordination patterns induced by exposure to a viscous force field
title_full_unstemmed Changes in muscle coordination patterns induced by exposure to a viscous force field
title_short Changes in muscle coordination patterns induced by exposure to a viscous force field
title_sort changes in muscle coordination patterns induced by exposure to a viscous force field
topic Research
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4910356/
https://www.ncbi.nlm.nih.gov/pubmed/27305944
http://dx.doi.org/10.1186/s12984-016-0164-3
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