Range of motion is the distance and direction of movement of a joint. Limited range of motion is a term meaning that a specific joint or body part cannot move through its normal range of motion. Motion may be limited by a mechanical problem within the joint, by swelling of tissue around the joint, by stiffness of the muscles, or by pain. Diseases that prevent a joint from fully extending may, over time, produce contracture deformities, causing permanent inability to extend the joint beyond a certain fixed position. |