Fig. 2

Left panel demonstrates the stroke survivors’ EMG activity amplitude during self-selected walking; the box plots indicate the range in the data, horizontal black line in center is the median, the upper and lower boundaries of the box indicating the upper and lower quartile respectively, and red markers represent extreme values. Right panel demonstrates AMAP scores of stroke survivors for the amplitude component of each muscle. The shaded gray area is the normal range of scores (±2.57). Each dot within a region of gait cycle represents score of a stroke survivor with solid red dots representing the subjects with scores outside the “normal” window of ±2.57. Positive scores, i.e. solid red dots above the “normal” window, represent EMG activation greater than “normal” and vice versa. For the clarity of data, we have adjusted the Y-axes scales on the right panel between ±5 and ± 11. The EMG data from each muscle were normalized to the averaged peak activation across all the steps taken by the subject