Fig. 5.

The evolution of classification performance and standard error through time for 2s after the motion onset. The vertical dashed lines correspond to the average moments of the shifts of between the phases while the shaded areas present the corresponding standard deviations accordingly. Figures a, b and c present the evolution of the classification performance of the control group and the amputee subjects for 5, 4 and 3 classes accordingly. Figures d and e compare the classification performance on 5 classes when using the forearm muscles and complete muscle-set as an input to the classifier a_e_l correspond to the angular acceleration of the elbow joint. The arrows above the angular acceleration represent its direction