Fig. 4

Changes of the subject’s sEMG signals recorded every week. HO, HC, WR, EF and EE represents hand open, hand close, wrist rotation, elbow flexion and elbow extension respectively. Average MAV of sEMG signals from each channel is represented in a 5 ×5 grey scale block. The first block displays the average MAV of sEMG signals recorded before rehabilitation. The first row of each block shows the average MAV of each channel when the subject intended to close his hand. Similarly, the second to fifth row of the block respectively represents the hand open, wrist rotation, elbow flexion and elbow extension