An exercise wheel for the upper limb. Usually mounted by its axle on the wall (less often on a movable stand), it is turned by a handle attached to one of the spokes. The circular motion of the upper limb varies according to the height of the axle attachment and the level of the handle. The resistance to the motion can be varied by a braking mechanism.
Eisenberg MG. 1995. Dictionary of Rehabilitation. New York: Springer Publishing Company. 375 p. Used with permission.