Fig. 7

Three-dimensional representation of the finger trajectories in subject ID 10. Finger trajectories in 3 dimensions shown for left and right hands were derived from six runs of a single right-handed subject (ID 10). The black dotted lines indicate the mean position of the finger tip sensors, P1–5, and the colours the 2 s tubes of the trajectories. Note (1) the opposed position of the thumb to fingers on both sides, while the workspace is considerably restricted on the left compared to the right; and (2) the clockwise rotation of the spatial trajectories involving thumb and fingers on the right, and the anticlockwise rotation on the left