Figure 1.

Method. A, Subject wearing the CyberGlove and with Polhemus FasTrak 3D sensors mounted on the wrist, the thumb and the index finger and with the hand in the starting position, prepared to receive and grasp a wooden block. The experimenter is holding the block prepared to drive it into the subject's grasp. B, Recorded angles and at the bottom, the calculated muscle length changes of the finger extensor and the thumb abductor muscles when grasping, holding and then releasing a 60 mm block.