Metrics to compare weight coefficients. Mean and standard deviation of the metric adopted to describe intra-group (i.e., dot
) and inter-groups (i.e., dot
) similarity between homologous synergies. Labels on the horizontal axis refer to: 0 w, pre treatment; 2 w, 2 weeks; 4 w, 4 weeks; 6 w, post treatment. The label * highlights when values for post-stroke subjects are significantly different from healthy control group (p < 0.05).