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Parallel Specification of Visuomotor Feedback Gains during Bimanual Reaching to Independent Goals

During goal-directed reaching, rapid visuomotor feedback processes enable the human motor system to quickly correct for errors in the trajectory of the hand that arise from motor noise and, in some cases, external perturbations. To date, these visuomotor responses, the gain of which is sensitive to...

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Detalles Bibliográficos
Autores principales: de Brouwer, Anouk J., Jarvis, Tayler, Gallivan, Jason P., Flanagan, J. Randall
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Society for Neuroscience 2017
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5348541/
https://www.ncbi.nlm.nih.gov/pubmed/28303262
http://dx.doi.org/10.1523/ENEURO.0026-17.2017
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author de Brouwer, Anouk J.
Jarvis, Tayler
Gallivan, Jason P.
Flanagan, J. Randall
author_facet de Brouwer, Anouk J.
Jarvis, Tayler
Gallivan, Jason P.
Flanagan, J. Randall
author_sort de Brouwer, Anouk J.
collection PubMed
description During goal-directed reaching, rapid visuomotor feedback processes enable the human motor system to quickly correct for errors in the trajectory of the hand that arise from motor noise and, in some cases, external perturbations. To date, these visuomotor responses, the gain of which is sensitive to features of the task and environment, have primarily been examined in the context of unimanual reaching movements toward a single target. However, many natural tasks involve moving both hands together, often to separate targets, such that errors can occur in parallel and at different spatial locations. Here, we examined the resource capacity of automatic visuomotor corrective mechanisms by comparing feedback gains during bimanual reaches, toward two targets, to feedback gains during unimanual reaches toward single targets. To investigate the sensitivity of the feedback gains and their relation to visual-spatial processing, we manipulated the widths of the targets and participants’ gaze location. We found that the gain of corrective responses to cursor displacements, while strongly modulated by target width and gaze position, were only slightly reduced during bimanual control. Our results show that automatic visuomotor corrective mechanisms can efficiently operate in parallel across multiple spatial locations.
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spelling pubmed-53485412017-03-16 Parallel Specification of Visuomotor Feedback Gains during Bimanual Reaching to Independent Goals de Brouwer, Anouk J. Jarvis, Tayler Gallivan, Jason P. Flanagan, J. Randall eNeuro New Research During goal-directed reaching, rapid visuomotor feedback processes enable the human motor system to quickly correct for errors in the trajectory of the hand that arise from motor noise and, in some cases, external perturbations. To date, these visuomotor responses, the gain of which is sensitive to features of the task and environment, have primarily been examined in the context of unimanual reaching movements toward a single target. However, many natural tasks involve moving both hands together, often to separate targets, such that errors can occur in parallel and at different spatial locations. Here, we examined the resource capacity of automatic visuomotor corrective mechanisms by comparing feedback gains during bimanual reaches, toward two targets, to feedback gains during unimanual reaches toward single targets. To investigate the sensitivity of the feedback gains and their relation to visual-spatial processing, we manipulated the widths of the targets and participants’ gaze location. We found that the gain of corrective responses to cursor displacements, while strongly modulated by target width and gaze position, were only slightly reduced during bimanual control. Our results show that automatic visuomotor corrective mechanisms can efficiently operate in parallel across multiple spatial locations. Society for Neuroscience 2017-03-10 /pmc/articles/PMC5348541/ /pubmed/28303262 http://dx.doi.org/10.1523/ENEURO.0026-17.2017 Text en Copyright © 2017 de Brouwer et al. http://creativecommons.org/licenses/by/4.0/ This is an open-access article 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 that the original work is properly attributed.
spellingShingle New Research
de Brouwer, Anouk J.
Jarvis, Tayler
Gallivan, Jason P.
Flanagan, J. Randall
Parallel Specification of Visuomotor Feedback Gains during Bimanual Reaching to Independent Goals
title Parallel Specification of Visuomotor Feedback Gains during Bimanual Reaching to Independent Goals
title_full Parallel Specification of Visuomotor Feedback Gains during Bimanual Reaching to Independent Goals
title_fullStr Parallel Specification of Visuomotor Feedback Gains during Bimanual Reaching to Independent Goals
title_full_unstemmed Parallel Specification of Visuomotor Feedback Gains during Bimanual Reaching to Independent Goals
title_short Parallel Specification of Visuomotor Feedback Gains during Bimanual Reaching to Independent Goals
title_sort parallel specification of visuomotor feedback gains during bimanual reaching to independent goals
topic New Research
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5348541/
https://www.ncbi.nlm.nih.gov/pubmed/28303262
http://dx.doi.org/10.1523/ENEURO.0026-17.2017
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