Fig. 6

Training-induced changes in muscle synergy, force control, and clinical evaluations. Pre- and post-training conditions are shown in grey and orange, respectively. The mild, moderate, and severe impairment groups are colored in red, green, and blue, respectively. Asterisks indicate statistical significance. A Mean muscle synergy activation scores pre- and post-training with error bars indicating standard deviation. B Mean muscle synergy vector similarity scores across trained muscle synergies, with error bars indicating standard deviation. C Mean force control scores pre- and post-training with error bars indicating standard deviation. D Correlation between synergy activation and force control scores across mild, moderate, and severe impairment groups. The dotted line indicates the best fit trend line. E FMA-UE clinical scores pre- and post-training for mild, moderate, and severe impairment groups with dotted lines showing best fit trends for each group. F WMFT-FAS clinical scores pre- and post-training for mild, moderate, and severe impairment groups with dotted lines showing best fit trends for each group