Fig. 1

Overall view of our system. Movement of participants’ head, arms, and hand was detected by an acceleration sensor, Kinect, and a data glove, respectively. Movements of the intact arm and hand were converted symmetrically like a mirror-reversed image as the movement of the affected arm and hand. Collision detection between the affected arm and the target object was used to provide participants with an image of the arms and the target object, a collision sound, and a vibration on vibrating motors