| 释义 |
Ball and socket joint
| a joint in which a ball moves within a socket, so as to admit of motion in every direction within certain limits. |
See also: Ball EncyclopediaSeeball-and-socket jointball and socket joint
ball and sock·et jointa multiaxial synovial joint in which a more or less extensive sphere on the head of one bone fits into a rounded cavity in the other bone, as in the hip joint. Synonym(s): articulatio spheroidea [TA], enarthrosis ☆ , spheroidal joint ☆ , articulatio cotylica, cotyloid joint, enarthrodial joint, socket joint, spheroid articulationball-and-socket joint The most freely movable type of synovial joint, in which the ball-like end of one bone (e.g., the humerus, femur) is surrounded by a spherical cartilaginous encasement, or “socket” (e.g., hip joint), or a group of structures that act as a functionally spherical encasement (e.g., shoulder joint), which allows free mobility of the articulating bone. |