10 THE POCKET ANATOMY 



IV. THE SHOULDER-JOINT. 



This joint between the head of the humerus and the glenoid 

 cavity is an enarthrodial or ball-and-socket joint. The long 

 tendon of the biceps acts as a ligament to this joint. 



The capsular ligament is attached to the circumference of 

 the glenoid cavity, and to the neck (anatomical) of the 

 humerus. It is very loose, and permits free movement of the 

 joint. There is generally an aperture on the inner side, 

 through which a piece of the synovial pouch protrudes to 

 form the bursa under the subscapularis. 



The coraco humeral or accessory ligament helps to 

 strengthen the capsule ; it is attached to the outer border 

 and base of the coracoid process, and below to the neck of 

 humerus, above great tuberosity, and it blends with the cap- 

 sule at the margins of the bicipital groove. 



Gleno-humeral ligaments, seen as three folds on inner aspect 

 of joint : 



The superior or Flood's ligament passes along inner edge of 

 biceps tendon from glenoid ligament to depression on lesser 

 tuberosity at inner margin of the bicipital groove. 



Middle : oblique, arises with superior, runs downwards 

 forming lower margin of aperture for subscapularis bursa 

 to lesser tuberosity. 



The inferior or Schlemm's ligament passes from the lower 

 part of the glenoid cavity to the neck of humerus on the 

 inner side of the small tuberosity. 



The glenoid ligament is a dense fibrous band attached 

 to the edge of the glenoid. cavity to deepen it, and is con- 

 tinuous with tendon of the long head of the biceps. 



Transverse over bicipital groove. 



A synovial membrane lines the joint, and protrudes to form 

 the bursa under the subscapularis. It is reflected round the 

 tendon of the biceps, and lines the bicipital groove. 



Subacromial bursa beneath acromion and deltoid, and over 

 supraspinatus and capsule. 



V. THE ELBOW-JOINT. 



The elbow is a ginglymus or hinge-joint, between the 

 trochlear surface of the humerus and the greater sigmoid 

 cavity of the ulna, combined with an arthrodial joint between 

 the capitellum of the humerus and the upper end of the 

 radius. 



The anterior ligament is attached, above to the front of 



