Fig. 3.

Cross-covariance patterns: velocity profiles. A: cross-covariance patterns between the reaching and grasping velocity profiles on the first day (thin, light gray dotted line) through the last day (thick black solid line) of a learning experiment for monkey K (left, purple gradient) and monkey Z (right, blue gradient). Color gradient from light gray through black along with line width indicates progression from first to last day of training experiment. B: cross-covariance patterns between the reaching and grasping velocity profiles in the learning experiments of monkey K (left) and monkey Z (right); cross covariance patterns between reaching and grasping velocity profiles of 2 other animals, monkey O (right, inset, brown) and monkey A (right, inset, black), making reach-to-grasp movements with intact limbs. C: dissimilarity index. Data are Euclidean distances between the pattern of cross-covariance on every day and the average pattern over the 3 prior days of training.