Fig. 3

Muscle activity print. Muscle activity represented by the coefficients of dominant and non-dominant arms for the three groups of subjects: healthy young subjects (first column), healthy elder subjects (second column), and stroke patients (third column). The activity of each muscle is shown as a boxplot representing the 1.5 inter quartile ratio and average values (whiskers and red line) as well as the first and third quartiles of the distribution (top and bottom limits of the box) and outliers (red crosses). a Results associated with elbow flexion. b Results associated with the steering motion. BR, brachioradialis; PT, pronator teres; B, biceps; T, triceps; AD, anterior deltoid; PD, posterior deltoid; PEC, pectoralis; IS, infraspinatus; ES, elector spinae