Work

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

Year: 2021

Type: article

Abstract: 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.

Source: Journal of Motor Behavior

DOI: 10.1080/00222895.2021.1941737

Authors: Charles R. Smith, Austin Hetherington, Sheri P. Silfies, Jill C. Stewart

Institution: University of South Carolina

Language: English

Topic: Motor Control and Adaptation

Subfield: Cognitive Neuroscience

Field: Neuroscience

Domain: Life Sciences

Open Access status: green

Funder: American Heart Association

Award: G3185351803