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Different strategy of hand choice after learning of constant and incremental dynamical perturbation in arm reaching

In daily life, we encounter situations where we must quickly decide which hand to use for a motor action. Here, we investigated whether the hand chosen for a motor action varied over a short timescale (i.e., hours) with changes in arm dynamics. Participants performed a reaching task in which they mo...

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Autores principales: Habagishi, Chie, Kasuga, Shoko, Otaka, Yohei, Liu, Meigen, Ushiba, Junichi
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Frontiers Media S.A. 2014
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3932483/
https://www.ncbi.nlm.nih.gov/pubmed/24605097
http://dx.doi.org/10.3389/fnhum.2014.00092
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author Habagishi, Chie
Kasuga, Shoko
Otaka, Yohei
Liu, Meigen
Ushiba, Junichi
author_facet Habagishi, Chie
Kasuga, Shoko
Otaka, Yohei
Liu, Meigen
Ushiba, Junichi
author_sort Habagishi, Chie
collection PubMed
description In daily life, we encounter situations where we must quickly decide which hand to use for a motor action. Here, we investigated whether the hand chosen for a motor action varied over a short timescale (i.e., hours) with changes in arm dynamics. Participants performed a reaching task in which they moved a specified hand to reach a target on a virtual reality display. During the task, a resistive viscous force field was abruptly applied to only the dominant hand (DH). To evaluate changes in hand choice caused by this perturbation, participants performed an interleaved choice test in which they could freely choose either hand for reaching. Furthermore, to investigate the effect of temporal changes on arm dynamics and hand choice, we exposed the same participants to another condition in which the force field was introduced gradually. When the abrupt force was applied, use of the perturbed hand significantly decreased and not changed during the training. In contrast, when the incremental force was applied, use of the perturbed hand gradually decreased as force increased. Surprisingly, even though the final amount of force was identical between the two conditions, hand choice was significantly biased toward the unperturbed hand in the gradual condition. These results suggest that time-varying changes in arm dynamics may have a greater influence on hand choice than the amplitude of the resistant force itself.
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spelling pubmed-39324832014-03-06 Different strategy of hand choice after learning of constant and incremental dynamical perturbation in arm reaching Habagishi, Chie Kasuga, Shoko Otaka, Yohei Liu, Meigen Ushiba, Junichi Front Hum Neurosci Neuroscience In daily life, we encounter situations where we must quickly decide which hand to use for a motor action. Here, we investigated whether the hand chosen for a motor action varied over a short timescale (i.e., hours) with changes in arm dynamics. Participants performed a reaching task in which they moved a specified hand to reach a target on a virtual reality display. During the task, a resistive viscous force field was abruptly applied to only the dominant hand (DH). To evaluate changes in hand choice caused by this perturbation, participants performed an interleaved choice test in which they could freely choose either hand for reaching. Furthermore, to investigate the effect of temporal changes on arm dynamics and hand choice, we exposed the same participants to another condition in which the force field was introduced gradually. When the abrupt force was applied, use of the perturbed hand significantly decreased and not changed during the training. In contrast, when the incremental force was applied, use of the perturbed hand gradually decreased as force increased. Surprisingly, even though the final amount of force was identical between the two conditions, hand choice was significantly biased toward the unperturbed hand in the gradual condition. These results suggest that time-varying changes in arm dynamics may have a greater influence on hand choice than the amplitude of the resistant force itself. Frontiers Media S.A. 2014-02-24 /pmc/articles/PMC3932483/ /pubmed/24605097 http://dx.doi.org/10.3389/fnhum.2014.00092 Text en Copyright © 2014 Habagishi, Kasuga, Otaka, Liu and Ushiba. http://creativecommons.org/licenses/by/3.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
spellingShingle Neuroscience
Habagishi, Chie
Kasuga, Shoko
Otaka, Yohei
Liu, Meigen
Ushiba, Junichi
Different strategy of hand choice after learning of constant and incremental dynamical perturbation in arm reaching
title Different strategy of hand choice after learning of constant and incremental dynamical perturbation in arm reaching
title_full Different strategy of hand choice after learning of constant and incremental dynamical perturbation in arm reaching
title_fullStr Different strategy of hand choice after learning of constant and incremental dynamical perturbation in arm reaching
title_full_unstemmed Different strategy of hand choice after learning of constant and incremental dynamical perturbation in arm reaching
title_short Different strategy of hand choice after learning of constant and incremental dynamical perturbation in arm reaching
title_sort different strategy of hand choice after learning of constant and incremental dynamical perturbation in arm reaching
topic Neuroscience
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3932483/
https://www.ncbi.nlm.nih.gov/pubmed/24605097
http://dx.doi.org/10.3389/fnhum.2014.00092
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