Figure 3

'Rotation' Task. The virtual environment consists of two cube configurations that are identical in composition but different in orientation. The participant rotates and laterally moves the green cubes to superimpose them onto the static blue cubes by matching their orientation. Movement of the green cubes is controlled by a magnetic marker attached to a cylinder held in the paretic hand or directly onto the dorsum of the hand at the 3^rd metacarpal head. Blocks were configured to require progressively greater amounts of supination ranging from 15° to 150° (from a start position of full pronation). Each practice block contained 20 trials, 10 requiring supination and 10 requiring pronation. A maximum of 60 seconds was allowed for each trial.