Figure 2. Schematic overview of the four movement tasks.

A = ballistic movement consisting of extension and flexion with abrupt movement onset without intentional stops (focused on movement initiation); B = stepwise interrupted movement consisting of flexion-extension with four intermediate stops (focused on movement inhibition); C = centre-out step-tracking, consisting of movement towards one of eight possible directions, stopping at the target location and returning slowly; D = continuous circle movement (wrist circumduction): consisting of following the moving target (clockwise or counter clockwise direction) as smoothly as possible (focused on gradual movement execution).