Related Experiment Video
Updated: Mar 31, 2026
Fabrication of the Composite Regenerative Peripheral Nerve Interface C-RPNI in the Adult Rat
Published on: February 25, 2020
Regenerative Peripheral Nerve Interface for Prostheses Control: Electrode Comparison
Ian C Sando1, Michelle K Leach1, Shoshana L Woo1
1Department of Surgery, University of Michigan, Ann Arbor, Michigan.
Background:
This study compared epimysial patch electrodes with intramuscular hook electrodes using monopolar and bipolar recording configurations. The purpose was to determine which strategy transduced muscle signals with better fidelity for control of myoelectric prostheses.
Methods:
One of the two electrode styles, patch (n = 4) or hook (n = 6) was applied to the left extensor digitorum longus muscle in rats. Electrodes were evaluated at the time of placement and at monthly intervals for 4 months. Evaluations consisted of evoked electromyography signals from stimulation pulses applied to the peroneal and tibial nerves in both monopolar and bipolar recording configurations.
Results:
Compared with hook electrodes, patch electrodes recorded larger signals of interest and minimized muscle tissue injury. A bipolar electrode configuration significantly reduced signal noise when compared with a monopolar configuration.
Conclusion:
Epimysial patch electrodes outperform intramuscular hook electrodes during chronic skeletal muscle implantation.
