Figure 7

Metrics for muscle synergies comparison. Mean and standard deviation (one side error bar) of the metrics (i.e., dot, ρ) adopted to describe the similarity between muscle synergies of healthy and hemiparetic patients at each walking speed. The three bars of each walking condition are respectively referred to MS1, MS2 and MS3. The red lines are the intra-group degree of similarity, in terms of dot and ρ, related to the healthy control group. The significance of the difference between groups (black vertical lines for the comparison unaffected-affected limb) or among speeds (black horizontal lines) is indicated as follows: * p < 0.05; ** p < 0.01.