Effect of Kinetic Degrees of Freedom on Multi-Finger Synergies and Task Performance during Force Production and Release Tasks

Abstract Complex structures present in a human body has relatively large degrees-of-freedom (DOFs) as compared to the requirement of a particular task. This phenomenon called motor redundancy initially deemed as a computational problem rather can be understood as having the flexibility to perform th...

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Autores principales:	Kitae Kim, Dayuan Xu, Jaebum Park
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2018
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/368da63eeaaa493092839f6ddf81597d
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spelling	oai:doaj.org-article:368da63eeaaa493092839f6ddf81597d2021-12-02T15:07:47ZEffect of Kinetic Degrees of Freedom on Multi-Finger Synergies and Task Performance during Force Production and Release Tasks10.1038/s41598-018-31136-82045-2322https://doaj.org/article/368da63eeaaa493092839f6ddf81597d2018-08-01T00:00:00Zhttps://doi.org/10.1038/s41598-018-31136-8https://doaj.org/toc/2045-2322Abstract Complex structures present in a human body has relatively large degrees-of-freedom (DOFs) as compared to the requirement of a particular task. This phenomenon called motor redundancy initially deemed as a computational problem rather can be understood as having the flexibility to perform the certain task successfully. Hence, the purpose of our study was to examine the positive impact of extra DOFs (redundant DOFs) during force production tasks. For this purpose, an experimental setup was designed to simulate archery-like shooting, and purposeful organization of a redundant set of finger forces determined the stability of important performance variables as well as accurate and precise performance. DOFs were adjusted by changing the number of fingers explicitly involved in the task. The concept of motor synergy and computational framework of uncontrolled manifold (UCM) approach was used to quantify stability indices during finger force production. As a result, accuracy and precision of the task improved with an increase in DOFs. Also, the stability indices of net finger forces and moment increased with active DOFs of fingers. We concluded that the controller actively utilizes extra DOFs to increase the stability of the performance, which is associated with the improved accuracy and precision of the task.Kitae KimDayuan XuJaebum ParkNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 8, Iss 1, Pp 1-11 (2018)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Kitae Kim Dayuan Xu Jaebum Park Effect of Kinetic Degrees of Freedom on Multi-Finger Synergies and Task Performance during Force Production and Release Tasks
description	Abstract Complex structures present in a human body has relatively large degrees-of-freedom (DOFs) as compared to the requirement of a particular task. This phenomenon called motor redundancy initially deemed as a computational problem rather can be understood as having the flexibility to perform the certain task successfully. Hence, the purpose of our study was to examine the positive impact of extra DOFs (redundant DOFs) during force production tasks. For this purpose, an experimental setup was designed to simulate archery-like shooting, and purposeful organization of a redundant set of finger forces determined the stability of important performance variables as well as accurate and precise performance. DOFs were adjusted by changing the number of fingers explicitly involved in the task. The concept of motor synergy and computational framework of uncontrolled manifold (UCM) approach was used to quantify stability indices during finger force production. As a result, accuracy and precision of the task improved with an increase in DOFs. Also, the stability indices of net finger forces and moment increased with active DOFs of fingers. We concluded that the controller actively utilizes extra DOFs to increase the stability of the performance, which is associated with the improved accuracy and precision of the task.
format	article
author	Kitae Kim Dayuan Xu Jaebum Park
author_facet	Kitae Kim Dayuan Xu Jaebum Park
author_sort	Kitae Kim
title	Effect of Kinetic Degrees of Freedom on Multi-Finger Synergies and Task Performance during Force Production and Release Tasks
title_short	Effect of Kinetic Degrees of Freedom on Multi-Finger Synergies and Task Performance during Force Production and Release Tasks
title_full	Effect of Kinetic Degrees of Freedom on Multi-Finger Synergies and Task Performance during Force Production and Release Tasks
title_fullStr	Effect of Kinetic Degrees of Freedom on Multi-Finger Synergies and Task Performance during Force Production and Release Tasks
title_full_unstemmed	Effect of Kinetic Degrees of Freedom on Multi-Finger Synergies and Task Performance during Force Production and Release Tasks
title_sort	effect of kinetic degrees of freedom on multi-finger synergies and task performance during force production and release tasks
publisher	Nature Portfolio
publishDate	2018
url	https://doaj.org/article/368da63eeaaa493092839f6ddf81597d
work_keys_str_mv	AT kitaekim effectofkineticdegreesoffreedomonmultifingersynergiesandtaskperformanceduringforceproductionandreleasetasks AT dayuanxu effectofkineticdegreesoffreedomonmultifingersynergiesandtaskperformanceduringforceproductionandreleasetasks AT jaebumpark effectofkineticdegreesoffreedomonmultifingersynergiesandtaskperformanceduringforceproductionandreleasetasks
_version_	1718388376651956224

Effect of Kinetic Degrees of Freedom on Multi-Finger Synergies and Task Performance during Force Production and Release Tasks

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