Fig. 8

Distribution of the muscle synergies from the different end-effectors into the different clusters. Every panel presents the results of the clustering process for each individual participant. Before being depicted in the figure, clusters were ranked based on their size. Different colors indicate the size of the clusters: blue for one muscle synergy, red for two muscle synergies, green for three muscle synergies, and purple for four muscle synergies. Clusters with four members, i.e. indicating muscle synergies exploited across all end-effectors, are highlighted