ELBOW JOINT. 



55 



stretched across the coracoid notch, and converting it into a fora- 

 men for the supra-scapular artery and nerve. 



Fig. 38. 



HUMERUS AND SCAPULA 



Capsular Ligament^ (Fig. 36). — 

 Surrounds the glenoid cavity and the 

 neck of the humerus ; it is loose and 

 perforated by the tendon of the long 

 head of the biceps.'^ It is deficient 

 behind ; this deficiency is supplied 

 by the tendons of the surrounding 

 muscles, particularly the sub-scapu- 

 laris. 



Coraco-hiimeral Ligament.^ — Ts 

 sometimes called adscititium ; is a thick 

 fasciculus of the capsular ligament, 

 proceeding from the coracoid pro- 

 cess, which holds the head of the 

 bone on a level with the glenoid 

 cavity. 



Glenoid Ligament. — A prismatic 

 ring of fibro-cartilage, attached to the 

 edge of the glenoid cavity, and in- 

 creasing its depth. The synovial membrane is very extensive, and 

 communicates with the bursse of tendons. 



ELBOW JOINT. 



Capsular Ligainent. — It surrounds the extremities of the humerus, 

 radius, and ulna. It is strengthened by the 



Internal lateral Ligame7it^ (Fig. 39), which, commencing at the 

 internal condyle, has two insertions, one into the coronoid, and 

 the other into the olecranon process of the ulna. 



External lateral Liganieyif^ (Fig. 40). — Is triangular, com- 

 mencing at the external condyle, and terminating in the annular 

 ligament. 



Coronary or annukir Ligament^ (Fig. 41). — Is strong and dense, 

 surrounding three-fourths of the head of the radius ; its extremities 

 are fastened on either side of the lesser sigmoid cavity. 



Interosseous Ligament^ (Fig. 39). — Is a ligamentous membrane, 

 filling up the space between the radius and ulna throughout their 

 length. It is perforated at its upper part, for the transmission of 

 the posterior interosseal artery; this deficiency is compensated for 

 by the ligamentum teres^ (Fig. 39), whose fibres are oblique and 



