116 



THE SKELETON 



hi-her an.l m.^re posterior; it is marked by three facets for the insertion ot nuiscles: 

 an\ii,i>er one for Ihe .npra-^pinaU,.. a inicklle for the tnfra-spinatas, and an inferior 

 for the terc. mlnnr. The lesser tuberosity is the more prominent; it serves for 

 the insertion of the srd..capuhns. The furrow between the tuberosities lodges the 

 long tendon <.f the biceps, extends downwards in the axis ot tlie humeral shaft, and, 



Fig. 1-23.— The Lkft Humekls. (Anterior view.) 



Supra-spinatus 



Subscapularis 



Latissimus dorsi 



Teres major ■ 



:v:i 



W 



BICIPITAL GROOVE 

 Peetoralis major 



Coraco-brachialis 



Bractaialis anticus 



Supinator longus 



Extensor carpi radialis longior 



Pronator radii teres 



Flexor carpi radialis 



Falmaris loncus 



Flexor sublimis digitorum 



Flexor carpi uluaris 



Extensor carpi radialis brevior 

 Extensor communis digitorum 

 Extensor minimi digit! 

 Extensor carpi uluaris 

 Supinator brevis 



gradually becoming shallower, ends near the junction of the upper and middle 

 third of the l)one. The margins of this, the bicipital groove, are called lips, and 

 afford attaeliment to muscles. The pertordlis iiutjur ()c(ui)ies the whole length of 

 the outer lip. The inner li]) receives, below, the teres major, and above, the 

 Intmimiis dorsi ; the tendon of the latter muscle is also attached to the floor of 

 the groove. Between the tuberosities, the transverse humeral ligament converts 



