The ability of a joint to withstand mechanical shocks and movements without becoming dislocated or otherwise displaced and injured. Stability is provided by the support of the surrounding bones (osseous stability) and the soft tissues, including the joint capsule. ligaments, and muscles. Stability varies according to whether the joint is moving (dynamic stability) or stationary (static stability). The bones contribute mainly to static stability; the ligaments and capsule to both static and dynamic stability; while the muscles contribute only to dynamic stability. Different joints vary greatly in their stability; different types of stability may vary within a single joint. The hip, for example, has a high osseous stability, while the knee has a low osseous stability, but high ligamentous and muscular stability. Excessive flexibility may reduce stability and make an individual accident prone.
Subjects: Sports and Exercise Medicine.