Figure 1:

Experimental setup. Participants sat comfortably with the trunk restrained by a five-point seatbelt. The participants hands and forearms were strapped into thermoplastic splints attached to a frame with a system of air jets (red) that lifted the arm above the glass surface, thus reducing friction during reaching movements. A screen (black) was reflected onto a mirror (grey) that obstructed the participant’s view of their arm. Participants were instructed to move a cursor, that represented the hand, towards a target and then back to the center point.