28 



TOPOGKAPHICAL ANATOMY OF 



the scapular spine fades away distally, the infra- and supra-spinous 

 muscles become intimately connected. 



The muscle has a double insertion — (1) A strong, flattened tendon 

 plays over the smooth, convex area of the greater tubercle of the 

 humerus, to be attached to a distinct impression on the crista tuberculi 



51. supraspinatus. M. siiViscapularis. 



M. pectoralis profundus. - 



M. coracobrachial is. - 



M. flexor carpi radialis. 



M. brachialis. 1/ 



Mm. teres major et 

 latissimus dorsi. 



]M. triceps brachii 

 (caput mediale). 



- M. anconaius. 



^ M. flexor carpi ulnaris. 

 Fig. 15. — Medial Asj)ect of the Humerus, with Areas of Muscular Attachment. 



Mm. flexores digitorum 

 sublimis et profundus. 



majoris. It should be observed that the tendon, as it crosses the bony 

 convexity, is retained in its place by a transverse band of fibres. If 

 this tendon be now severed about its middle, the second insertion can be 

 displayed. At the same time it must be observed that, as is commonly 

 the case where a tendon plays over a bony surface, the convexity is 

 made smooth by a veneer of fibro-cartilage, and friction is still further 

 reduced by the presence of a synovial bursa. (2) The second insertion 

 is mainly flesliy and is into the medial aspect of the convexity of the 

 greater tubercle, in close relation to the joint-capsule. 



