Journal of Reconstructive Microsurgery · 2015 · 14 citations · 0 references
EngineeringBioengineeringBiomedical EngineeringElectrophysiologyNeural EngineeringPeripheral Nerve SurgeryElectromyogram AnalysisImplantable Biomedical DevicesMuscle Signal ProcessingMyoelectric ProsthesesPeripheral Nerve InterfacesProsthetic Control SystemsChronic ImplantationElectrode - Nerve InterfaceElectrode Configuration DesignElectrode-nerve InterfaceElectromyographyMyoelectric ControlMyoelectric Prosthesis ControlSignal Noise Reduction
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.