Application of EMG feedback for hand prosthesis control in high-level amputation: a case study.
Jack Tchimino1, Rehne Lessmann Hansen2, Peter Holmberg Jørgensen2
1Department of Health Science and Technology, Aalborg University, Aalborg, Denmark.
Scientific Reports
|December 31, 2024
Summary
Electromyography (EMG) feedback enhances control of myoelectric prosthetic hands. This study shows EMG feedback effectively improves force control even in high-level amputations with non-intuitive muscle use.
Area of Science:
- Biomedical Engineering
- Rehabilitation Technology
- Neuroprosthetics
Background:
- Electromyography (EMG) feedback, using tactile stimulation, improves force control in myoelectric hand prostheses.
- High-level amputations present unique challenges for prosthesis control due to altered muscle function and intuitive relationships.
Purpose of the Study:
- To evaluate the efficacy of EMG feedback for force control in a participant with a high-level arm amputation.
- To assess if EMG feedback can be successfully utilized with non-intuitive muscle activation (pectoralis major) for prosthesis control.
Main Methods:
- A single participant with a high-level amputation underwent four experimental sessions using a myoelectric hand prosthesis.
- Vibrotactile feedback was delivered to the torso, and EMG signals were recorded from three different muscles.
- Performance was measured using a force-matching task, with success rate as the primary metric.
Main Results:
- The participant demonstrated effective use of EMG feedback after initial training, improving force control.
- EMG feedback led to an approximate 30% increase in the target force success rate.
- Post-training, performance using the muscle on the amputated side matched that of the contralateral side.
Conclusions:
- EMG feedback is a viable method for enhancing myoelectric prosthesis control in individuals with high-level amputations.
- This technology can overcome challenges posed by extensive limb loss and non-intuitive muscle control sites.
