Figure 2: A) Arm position matching in a healthy control subject. For presentation purposes only we have transposed the target locations of the robotically moved hand (filled symbols) and overlaid them on the locations where the subjects moved the opposite active hand (open symbols). Ellipses denote trial-to-trial variability. B) Top: hand paths for visually-guided reaching movement from central target to one of eight peripheral targets in a normal control subject. Bottom: hand speed profiles for movement towards left upwards and right downwards directions respectively, with time zero denoting onset time of visual target.