User adaptation in long-term, open-loop myoelectric training: implications for EMG pattern recognition in prosthesis control

Recent studies have reported that the classification performance of electromyographic (EMG) signals degrades over time without proper classification retraining. This problem is relevant for the applications of EMG pattern recognition in the control of active prostheses.In this study we investigated the changes in EMG classification performance over 11 consecutive days in eight able-bodied subjects and two amputees.It was observed that, when the...