THE HUMEEUS. 



205 



HEAD 



The proximal extremity is the thickest and stoutest part of the bone. The 

 caput humeri (head), which forms about one-third of a spheroid and is covered with 



articular cartilage, is directed proxim- 

 ally, medially, and slightly dorsally, and 

 rests in the glenoid cavity of the scapula; 

 the convexity of its surface is most pro- 

 nounced in its posterior half. Separating 

 the head from the tubercles laterally is 

 a shallow groove, which fades away on 

 the surface of the bone which supports 

 the articular part inferiorly. This is 

 named the collum anatomicum (anato- 

 mical neck) and serves for the attachment 

 of the capsule of the shoulder- joint. The 



SUPRA- SUBSCAPULARIS 



L. LATISSIMUS DORSI 



r PECTORALIS MAJOR 

 TERES MAJOR 



NUTRIENT FORAMEN 



DELTOID 



CORACOBRACHIALIS 



MEDIAL EPICONDYLIC 

 RIDGE (medial margin) 



[.. BRACHIORADIALIS 



EXTENSOR CARPI 

 RADIALJS LONOUS 



LATERAL 

 2PICONDYLE 



CAPITULUM 



.. 



CORONOID FOSSA 



MEDIAL 

 EPICONDYLE 



TROCHLEA 



EXTENSORS 



PRONATOR TERES 



AND FLEXORS 



194. ANTERIOR VIEW OF THE RIGHT HUMBRUS. 



FIG. 195. THE ANTERIOR SURFACES 

 OF THE HUMERUS WITH , MUSCULAR 

 ATTACHMENTS MAPPED OUT. 



articular edge of the groove opposite the lesser tubercle is usually notched for the 

 attachment of the superior gleno-humeral ligament. The tuberculum majus (greater 



