DISSECTING MANUAL. 



formed by its longitudinal fibres and run 'from the anterior 

 border of the glenoid fossa to the neck of the humerus; of 

 these, one (superior) lies above the opening under the Sub- 

 scapularis tendon, and the others (middle and inferior) lie 

 below it. [276] 



Accessory Ligaments. The coraco-humeral is a flat band run- 

 ning from the outer border of the root of the coracoid process 

 to the neck of the humerus close to the great tuberosity; its 

 posterior border fuses with the capsule. The coraco-glenoid (in- 

 constant) is a band arising from the coracoid process with the 

 preceding, and running to the upper and posterior margin of 

 the head of the scapula. [277] 



The synovial membrane lines the capsule, extending from the 

 margin of the glenoid fossa to the humeral attachments of the 

 capsule, whence it is reflected on the humeral neck, chiefly in- 

 feriorly, as far as the articular surface. It forms a sheath for 

 the Biceps tendon, being prolonged into the bicipital groove, 

 and communicates with the bursae. [278] 



Elbow Joint. This is a ginglymus diarthrosis between the 

 trochlea and capitellum of the humerus and, respectively, the 

 great sigmoid cavity of the ulna, and the cup on the head of 

 the radius. It has a complete capsule formed by the union of 

 the four following proper ligaments, viz.: The anterior is a 

 layer of oblique, vertical, and transverse fibres, attached 

 above to the upper margins of the coronoid and supracapitel- 

 lar fossae; and below to the margin of the coronoid process 

 and to the orbicular ligament, some fibres reaching the neck 

 of the radius; the lateral portions are relatively thin. The 

 posterior is a thin layer attached above to the margin of 

 the olecranon fossa; and below to the summit and sides of 

 the olecranon process; externally some fibres run from the 

 back of the capitellum to the posterior border of the lesser 

 sigmoid cavity. [279] 



The internal lateral is a fan-shaped layer, strongest at its 

 margins; it is attached above to the anterior, inferior, and pos- 



[152] 



