• Ian C Sando, Michelle K Leach, Shoshana L Woo, Jana D Moon, Paul S Cederna, Nicholas B Langhals, and Melanie G Urbanchek.
• Department of Surgery, University of Michigan, Ann Arbor, Michigan.
• J Reconstr Microsurg. 2016 Mar 1; 32 (3): 194-9.

BackgroundThis 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.MethodsOne 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.ResultsCompared 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.ConclusionEpimysial patch electrodes outperform intramuscular hook electrodes during chronic skeletal muscle implantation.Thieme Medical Publishers 333 Seventh Avenue, New York, NY 10001, USA.

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