Task design and example trajectories. A: illustration of the experimental apparatus (Kinarm, BKIN Technologies, Kingston, ON, Canada, figure adapted from Ref. 55). B: the task: participants had to make point-to-point outward reaching movements to eight different targets (cyan) beginning from a starting position (pink). Vision of the hand was occluded; instead, during movement, a cursor was displayed on screen on the plane of the arm.