A device 50 for supporting and positioning a part of a patients body includes at least two joints 62, 64, 66 each having a locked state and an unlocked state and a release system for allowing an operator to select between the locked state and the unlocked state. The release system has an operator interface remote from the joints and at a location that enables the operator to support the weight of the body part while at least one of the joints is in the unlocked state.
