Arm muscle synergies enhance hand posture prediction in combination with forearm muscle synergies.

Autor: Tanzarella S; Event-Driven Perception, Italian Institute of Technology, Via San Quirico, 19, 16163 Genova, GE, Italy., Di Domenico D; Rehab Technologies Lab, Italian Institute of Technology, Via Morego, 30, 16163 Genova, GE, Italy.; Department of Electronics and Telecommunications, Politecnico di Torino, Turin 10124, Italy., Forsiuk I; Rehab Technologies Lab, Italian Institute of Technology, Via Morego, 30, 16163 Genova, GE, Italy., Boccardo N; Rehab Technologies Lab, Italian Institute of Technology, Via Morego, 30, 16163 Genova, GE, Italy.; Open University Affiliated Research Centre at Istituto Italiano di Tecnologia (ARC@IIT), Genova, Italy., Chiappalone M; Rehab Technologies Lab, Italian Institute of Technology, Via Morego, 30, 16163 Genova, GE, Italy.; Bioengineering Lab, University of Genova, DIBRIS, Genova, Italy., Bartolozzi C; Event-Driven Perception, Italian Institute of Technology, Via San Quirico, 19, 16163 Genova, GE, Italy., Semprini M; Rehab Technologies Lab, Italian Institute of Technology, Via Morego, 30, 16163 Genova, GE, Italy.
Jazyk: angličtina
Zdroj: Journal of neural engineering [J Neural Eng] 2024 Apr 15; Vol. 21 (2). Date of Electronic Publication: 2024 Apr 15.
DOI: 10.1088/1741-2552/ad38dd
Abstrakt: Objective. We analyze and interpret arm and forearm muscle activity in relation with the kinematics of hand pre-shaping during reaching and grasping from the perspective of human synergistic motor control. Approach. Ten subjects performed six tasks involving reaching, grasping and object manipulation. We recorded electromyographic (EMG) signals from arm and forearm muscles with a mix of bipolar electrodes and high-density grids of electrodes. Motion capture was concurrently recorded to estimate hand kinematics. Muscle synergies were extracted separately for arm and forearm muscles, and postural synergies were extracted from hand joint angles. We assessed whether activation coefficients of postural synergies positively correlate with and can be regressed from activation coefficients of muscle synergies. Each type of synergies was clustered across subjects. Main results. We found consistency of the identified synergies across subjects, and we functionally evaluated synergy clusters computed across subjects to identify synergies representative of all subjects. We found a positive correlation between pairs of activation coefficients of muscle and postural synergies with important functional implications. We demonstrated a significant positive contribution in the combination between arm and forearm muscle synergies in estimating hand postural synergies with respect to estimation based on muscle synergies of only one body segment, either arm or forearm ( p < 0.01). We found that dimensionality reduction of multi-muscle EMG root mean square (RMS) signals did not significantly affect hand posture estimation, as demonstrated by comparable results with regression of hand angles from EMG RMS signals. Significance. We demonstrated that hand posture prediction improves by combining activity of arm and forearm muscles and we evaluate, for the first time, correlation and regression between activation coefficients of arm muscle and hand postural synergies. Our findings can be beneficial for myoelectric control of hand prosthesis and upper-limb exoskeletons, and for biomarker evaluation during neurorehabilitation.
(Creative Commons Attribution license.)
Databáze: MEDLINE