Bilateral Asymmetry of Hand Force Production in Dynamic Physically-Coupled Tasks

Physically-coupled bimanual tasks (activities where a force effect occurs between two human limbs) involve the coordination and cooperation of bilateral arms. Such uncertain contribution of two arms is often studied under static configuration, which is not sufficient to typify all activities of dail...

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Bibliographic Details
Published in:IEEE journal of biomedical and health informatics 2022-04, Vol.26 (4), p.1826-1834
Main Authors: Sun, Chenyang, Chu, Kaiya, Miao, Qing, Ping, Li, Zhong, Wenjuan, Qi, Shichen, Zhang, Mingming
Format: Article
Language:English
Subjects:
Activities of Daily Living
arm movements
Arms
Asymmetry
Bilateral force control
Control tasks
Coordination
Dynamics
Force
Force control
Functional Laterality - physiology
Hand
Hand (anatomy)
Hand Strength - physiology
Handedness
Hemispheric laterality
Homology
Humans
Isometric
Muscle contraction
Muscles
physically-coupled tasks
Psychomotor Performance - physiology
Robot kinematics
robot-mediated rehabilitation
Task analysis
Trajectory
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Summary:Physically-coupled bimanual tasks (activities where a force effect occurs between two human limbs) involve the coordination and cooperation of bilateral arms. Such uncertain contribution of two arms is often studied under static configuration, which is not sufficient to typify all activities of daily life (ADLs). This study aims to investigate people's bilateral force production and control in dynamic tasks. Experiments were conducted with a customized robotic system that is characterized with two handles and programmable force fields between them. Fourteen healthy right-handed human volunteers were instructed to generate force with each hand when performing predefined trajectory tracking tasks, in which the sum of forces contributed by the left and the right hand is required to equal a target force. Significant asymmetry was found in the force output between bilateral hands. With the homologous muscles activated synchronously, the contribution of the left hand was larger, while when the non-homogenous muscles were activated synchronously, the laterality was subject to the moving direction. In addition, when considering the force difference between two hands in terms of direction and magnitude, the former decreased with the increase of the target force, but the latter was more sensitive to moving directions. The results reveal the unique characteristics of non-isometric force control tasks compared with isometric ones.
ISSN:2168-2194
2168-2208
DOI:10.1109/JBHI.2021.3112201