Research Article

Motor Control System for Adaptation of Healthy Individuals and Recovery of Poststroke Patients: A Case Study on Muscle Synergies

Figure 6

A gradual reduction in energy consumption as proper muscle synergies were recruited. (a) The gradual conversion of the one-dimensional synergy () to two-dimensional synergies () through training in the adaptive environment (, 9 participants). (b) Changes in system energy through adaptation in the adaptation environment. Linear least-squares regression line () to illustrate the adaptation direction. System energy was computed as the total muscle activation needed to complete a trial (mean, 9 participants). Greater muscle activations are associated with higher energy cost.