Regenerative peripheral nerve interfaces (RPNIs) and implanted electrodes improve online control of prostheses for hand and wrist
Dylan M Wallace, Luis Hernan Cubillos, Mira E Mutnick, Alex K Vaskov, Alicia J Davis, Theodore A Kung, Paul S Cederna, Deanna H Gates, Cynthia A Chestek
TL;DR
This study shows that implanted electrodes in regenerative nerve interfaces improve prosthetic hand and wrist control compared to traditional surface electrodes.
Contribution
The study demonstrates that regenerative peripheral nerve interfaces with implanted electrodes provide superior control for prosthetic limbs.
Findings
Implanted electrodes provided high signal quality and long-term stability for prosthetic control.
Participants achieved faster and more accurate control using RPNIs and iEMG compared to surface EMG.
Wrist rotation control reduced body compensations and improved task completion times.
Abstract
Objective. Upper limb amputation severely limits daily activities and independence. Current prosthetic control methods often rely on surface electromyography (sEMG), which suffers from low signal quality and limited functionality. This study investigates whether implanted electrodes in regenerative peripheral nerve interfaces (RPNIs) and residual innervated muscles can provide stable and high-quality control signals to improve dexterous prosthetic hand and wrist function. Approach. Two individuals with upper-limb amputation had RPNIs created by suturing free skeletal muscle grafts to peripheral nerves or nerve fascicles in the residual limb. Intramuscular EMG (iEMG) electrodes were implanted into the RPNIs and muscles in the residual limb. EMG signals were recorded from both sEMG and iEMG electrodes and used to control a virtual prosthetic hand + wrist in real time. Performance was…
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Taxonomy
TopicsMuscle activation and electromyography studies · Neuroscience and Neural Engineering · Advanced Sensor and Energy Harvesting Materials