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Scaling of Joint Motion and Muscle Activation for 3-Dimensional Control of Reach Extent
Journal article   Open access   Peer reviewed

Scaling of Joint Motion and Muscle Activation for 3-Dimensional Control of Reach Extent

Charles R. Smith, Austin Hetherington, Sheri P. Silfies and Jill C. Stewart
Journal of motor behavior, v 54(2), pp 222-236
07 Feb 2022
DOI: https://doi.org/10.1080/00222895.2021.1941737
PMID: 34251986
url
https://figshare.com/articles/journal_contribution/Scaling_of_Joint_Motion_and_Muscle_Activation_for_3-Dimensional_Control_of_Reach_Extent/14963340View
SubmittedCC BY V4.0,  Open

Abstract

feedback feedforward joint coordination motor control reaching
This study investigated the scaling of upper arm kinematics, joint motion, and muscle activation for three-dimensional (3D) reaches to targets of increasing distance. Fifteen participants completed 108 total reaches to targets placed 7, 14, and 21 cm across midline. Peak velocity, acceleration, and time to peak velocity scaled to both target and movement distance. Shoulder and elbow excursion scaled to target distance and were highly coordinated. Anterior deltoid activation scaled to both target and movement distance in the early and late phases of reach control. Biceps and triceps activation scaled to movement distance primarily in the late phase. Scaling of these outcome variables provides a model for understanding the control of reach distance in a 3D environment.

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2 citations in Web of Science
1 citations in Scopus

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Web of Science research areas
Neurosciences
Psychology
Psychology, Experimental
Sport Sciences
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