OF THE ANTERIOR EXTREMITY. 



79 



the upper or visceral surface of 

 the scapula. It arises from a 

 bony ridge found on the upper 

 surface of the coracoid and of 

 the proc. coracoidens ef the scap- 

 ula. The muscle runs outwards 

 and is inserted, after widening 1 , 

 into the inner surface of the 

 crista (leUoldea of the humeras ; 

 it is antagonistic to the deltoid, 

 and draws the raised arm back- 

 wards and towards the trunk. 



Fig. 70. 



Right shoulder, from below, arm strongly 

 abdncted. 



rf Clavicle. 



to Coracoid. 



d Deltoideus. 



if Clavicular portion of deltoid. 



h Humerua. 



Snbscapular muscle. 



w 



51. JA. infraxpinatv* 

 57, between /// and 

 VM. Fig. 7 1 /). 



Duges. adscapnlo-hnmeral. 



on Hie superficial surface. 





The ni. infratplnatu* re- 

 presents the HI. infraspina- 

 tvs, fere* major and minor of 

 human anatomy. It is of 

 triangular form, with the 

 broad base directed in- 

 wards ; it arises from the 

 whole of the upper sur- 

 face of the suprascapula 

 except along the inner 

 border which is formed 

 of hyaline cartilage alone : 

 from this origin the fibres 

 converge outwards to a 

 Hat tendon which unites 

 with that of the m. tatix- 

 stlmm dor si to be inserted 

 into the crista deltoidea hv.- 

 //teri, by means of a thin, 

 triangular, tendinous ex- 

 pansion. 



_fd' ' 

 . 



Majcfes of the back and shoulder. 



M. cucnllarU. 



dm M . depressor maxillae. 

 .fit Fascia dursatis. 

 /'/' Fascia dorsahs reflected, 

 i M. infra^pinatus. 

 l.a M. levator anguli scapulae. 

 Id M. lati^imus dorsi. 

 '- M. ret rahens scapulae. 

 *r X. sternodeidomagtoidens. 



