肩关节是人体活动度最大的关节。狭义的肩关节一般是指肱骨头与肩胛骨关节盂之间的关节,称肩肱关节。但日常生活中,肩部活动不局限于这一关节,而是涉及到广义的肩关节,即肩肱关节、肩胸关节、肩锁关节和胸锁关节等。这些关节之间彼此协调,有节律地共同活动,才构成肩关节活动的全部。 Shoulder joint is the largest human activity joints. Narrow shoulder generally refers to the humeral head and shoulder joint glenoid joint, called the shoulder humerus. However, in daily life, shoulder activity is not limited to this joint, but involves a broad range of shoulder joints, namely, the shoulder and shoulder, shoulder and shoulder joints, acromioclavicular joint and sternoclavicular joints. The coordination between these joints, rhythmic activities together, constitute the whole shoulder activities.