Fig. 7.

Muscle synergies of preschoolers explained as fractionations of synergies of ground-stepping neonates. (A) The procedure identified synergies of preschoolers as fractionations of neonate synergies in the indicated percentages, since the synergies identified as fractionations could be linearly combined to reconstruct the corresponding neonate synergies. (B) The same procedure applied to random synergies obtained by shuffling the experimental ones. (C) Box-and-whisker plots for median and 5th to 95th percentiles (over 100 bootstrap iterations) of scalar-product similarity between original and reconstructed synergies. (D) Overall percentages of neonate synergies significantly split in the synergies of preschoolers or shuffled data.