Figure 5.

(A) Average classification accuracy in five different conditions (100, 90, 50, 30, and 10% of EMG signal amplitude) using only the EMG signals (blue bars) to classify between right swing, left swing and stance phases, with respect to the performance achieved by the use of EEG and EMG signals together (yellow bars). (B) Confusion matrices obtained on the test set by the classifier using only the EMG signals and the hybrid (EEG + EMG) approach at different levels of EMG amplitude. ^*p < 0.05; ^**p < 0.01.