Generalizability of muscle synergies in isometric force generation versus point-to-point reaching in the human upper extremity workspace.

ABSTRACT: Isometric force generation and kinematic reaching in the upper extremity has been found to be represented by a limited number of muscle synergies, even across task-specific variations. However, the extent of the generalizability of muscle synergies between these two motor tasks within the arm workspace remains unknown. In this study, we recorded electromyographic (EMG) signals from 13 different arm, shoulder, and back muscles of ten healthy individuals while they performed isometric and kinematic center-out target matches to one of 12 equidistant directional targets in the horizontal plane and at each of four starting arm positions. Non-negative matrix factorization was applied to the EMG data to identify the muscle synergies. Five and six muscle synergies were found to represent the isome

SUBMITTER: Pham K 

PROVIDER: S-EPMC10387555 | biostudies-literature | 2023

REPOSITORIES: biostudies-literature