Figure 1.

Application of our information-based method to the synchronous synergies extracted from the EMG data of all four subjects recorded during the execution of an arm pointing task. (A) The sets of synchronous synergies obtained from the experimental data of four subjects as vectors of activation levels of nine shoulder and elbow muscles for each subject. (B) Histograms of the integral of the activation coefficient (I) across the eight motor tasks performed. (C) VAF (black curve whose scale is indicated in left y-axis) and information curves (red curve whose scale is indicated in right y-axis). The shaded area represents the 5–95% confidence interval of the bootstrap test for decoding (see Materials and Methods).