Surface electromyographic signals using dry electrodes
For many electromyography (EMG) applications, a suitable dry electrode would simplify practical implementation of an EMG recording system. Wearable mobility monitoring is an example of such a system. Therefore, surface EMG signals, from Fraunhofer Institute for Biomedical Engineering (IBMT) flexible dry electrodes and Orbital Research electrodes, were compared to signals from conventional Ag/AgCl electrodes. EMG measurements were performed on the right tibialis anterior for a range of different activities, such as light twitches, isometric contractions, jumping, and walking. Signal feature comparisons, skin preparation effects (i.e., cleaning with isopropyl alcohol), and impedance-noise analyses were performed. Results showed that both dry electrodes had comparable sensitivity to the standard Ag/AgCl electrodes for detecting small unloaded muscle contractions and large loaded contractions. Results also showed that noise content and impedance are weakly correlated and skin preparation methods did not have a positive effect on skin/electrode impedance.
|Keywords||Electrodes, electromyography (EMG), myoelectric signal, noise, skin preparation|
|Journal||IEEE Transactions on Instrumentation and Measurement|
Laferriere, P. (Pascal), Lemaire, E.D. (Edward D.), & Chan, A. (2011). Surface electromyographic signals using dry electrodes. In IEEE Transactions on Instrumentation and Measurement (Vol. 60, pp. 3259–3268). doi:10.1109/TIM.2011.2164279