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Cooperative hand movements: task‐dependent modulation of ipsi‐ and contralateral cortical control

Cooperative hand movements are known to be controlled by a task‐specific neural coupling associated with an involvement of the respective ipsilateral hemispheres. The aim of this study was to explore in how far this neural control applies to and is modulated during various, fine and gross, cooperati...

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Autores principales: Schrafl‐Altermatt, Miriam, Easthope, Christopher S.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: John Wiley and Sons Inc. 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5974733/
https://www.ncbi.nlm.nih.gov/pubmed/29845769
http://dx.doi.org/10.14814/phy2.13581
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author Schrafl‐Altermatt, Miriam
Easthope, Christopher S.
author_facet Schrafl‐Altermatt, Miriam
Easthope, Christopher S.
author_sort Schrafl‐Altermatt, Miriam
collection PubMed
description Cooperative hand movements are known to be controlled by a task‐specific neural coupling associated with an involvement of the respective ipsilateral hemispheres. The aim of this study was to explore in how far this neural control applies to and is modulated during various, fine and gross, cooperative hand movements required during activities of daily living. Somatosensory evoked potentials and contralateral electromyographic reflex responses to unilateral ulnar nerve stimulation were simultaneously recorded in healthy participants during three different cooperative hand movement tasks and a resting condition. Amplitude ratio (ipsi‐/contralateral) of the somatosensory evoked potentials, which is a measure for the involvement of the ipsilateral hemisphere in movement control, was higher in all three movement tasks compared to resting. This ratio was highest during the fine cooperative movement studied here. Contralateral reflex responses, as a measure for the functional coupling of the arms, were elicited following stimulation of both arms during gross cooperative movements. However, such a response could only be elicited in the dominant arm during fine movement. It is concluded that the neural coupling and thus enhancement of ipsilateral cortical control is preserved through different cooperative hand movement tasks, independently whether fine or gross motor tasks are performed. However, modulation of cortical control can be observed as ipsilateral cortical control is stronger during fine movements and functional coupling of the arms more focused to the dominant hand compared to gross cooperative tasks.
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spelling pubmed-59747332018-06-05 Cooperative hand movements: task‐dependent modulation of ipsi‐ and contralateral cortical control Schrafl‐Altermatt, Miriam Easthope, Christopher S. Physiol Rep Original Research Cooperative hand movements are known to be controlled by a task‐specific neural coupling associated with an involvement of the respective ipsilateral hemispheres. The aim of this study was to explore in how far this neural control applies to and is modulated during various, fine and gross, cooperative hand movements required during activities of daily living. Somatosensory evoked potentials and contralateral electromyographic reflex responses to unilateral ulnar nerve stimulation were simultaneously recorded in healthy participants during three different cooperative hand movement tasks and a resting condition. Amplitude ratio (ipsi‐/contralateral) of the somatosensory evoked potentials, which is a measure for the involvement of the ipsilateral hemisphere in movement control, was higher in all three movement tasks compared to resting. This ratio was highest during the fine cooperative movement studied here. Contralateral reflex responses, as a measure for the functional coupling of the arms, were elicited following stimulation of both arms during gross cooperative movements. However, such a response could only be elicited in the dominant arm during fine movement. It is concluded that the neural coupling and thus enhancement of ipsilateral cortical control is preserved through different cooperative hand movement tasks, independently whether fine or gross motor tasks are performed. However, modulation of cortical control can be observed as ipsilateral cortical control is stronger during fine movements and functional coupling of the arms more focused to the dominant hand compared to gross cooperative tasks. John Wiley and Sons Inc. 2018-05-15 /pmc/articles/PMC5974733/ /pubmed/29845769 http://dx.doi.org/10.14814/phy2.13581 Text en © 2018 The Authors. Physiological Reports published by Wiley Periodicals, Inc. on behalf of The Physiological Society and the American Physiological Society. This is an open access article under the terms of the http://creativecommons.org/licenses/by/4.0/ License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
spellingShingle Original Research
Schrafl‐Altermatt, Miriam
Easthope, Christopher S.
Cooperative hand movements: task‐dependent modulation of ipsi‐ and contralateral cortical control
title Cooperative hand movements: task‐dependent modulation of ipsi‐ and contralateral cortical control
title_full Cooperative hand movements: task‐dependent modulation of ipsi‐ and contralateral cortical control
title_fullStr Cooperative hand movements: task‐dependent modulation of ipsi‐ and contralateral cortical control
title_full_unstemmed Cooperative hand movements: task‐dependent modulation of ipsi‐ and contralateral cortical control
title_short Cooperative hand movements: task‐dependent modulation of ipsi‐ and contralateral cortical control
title_sort cooperative hand movements: task‐dependent modulation of ipsi‐ and contralateral cortical control
topic Original Research
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5974733/
https://www.ncbi.nlm.nih.gov/pubmed/29845769
http://dx.doi.org/10.14814/phy2.13581
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