154 



ASATOillCAL TECHNOLOGY. 







attacliment are enclosed by interrupted lines. Following the method of Gray (A) and 

 H. S. Williams (1), the origins are indicated by dots and the insertions by short lines. It is 

 easy to associate these two marks with the letters and i, which form respectively the 

 initials of origin and insertion. 



The scapula affords origin to the following 10 muscles : Subscapularis, supraspinatvs, 

 infraspinatus, meditrieeps, spino-deitoideus, acromio-deltoideus, teres (major), mieostalis 



(teres minor), biceps and eara- 

 coideus. Upon it are inserted 

 the following 7 muscles : 

 Aeromio-trapezius, spino-tra- 

 pezius, rhomhoideus, serratus, 

 levator anguli scapulce, levator 

 dameulcB and occipito-scapu- 

 laris. On the figure the in- 

 sertion area of the last named 

 muscle is represented as too 

 near the coraco-vertebral an- 

 gle. 



§ 386. CoUum — Neck. — 

 This is the thickened and 

 slightly constricted portion of 

 the scapula connecting the 

 glenoid end or angle with the 

 body of the bone. According 

 to Quain (A, II, 83), its limits 

 are differently assigned by 

 anatomists and surgeons. 



§387. Foramen Nutriens — 

 The vascular foramen. — There 

 may be 1, 2 or 3 of these fora- 

 mina upon the ental aspect, 

 and their location is quite 

 variable. They always enter 

 obliquely so as to point toward 

 the glenoid end of the bone, and at least one of them is traceable to the base of the 

 mesoscapida. 



Fossa Olenoidea. — See description of Fig. 45, § 399. 



§ 388. Fossa Subscapularis. — This name is applied to the entire ental surface of the 

 bone ; as shown upon the figure, however, the muscle of the same name does not arise 

 from the whole area. Most of the margin of the fossa is more or leas raised. The shaded 

 area represents a shallow longitudinal furrow which coincides nearly with the mesoscap- 

 ula (Fig. 44). 



Between the furrow and the coracoid margin are two well marked ridges for the attach- 

 ment of tendinous intersections of the M. subscapularis ; there are usually other ridgrs 

 which are most distinct in old individuals. Near the glenoid margin is a prominent ridge 

 "which separates the Fs. subscnpularis proper from the shallow furrow which gives origin 

 to the M. teres. The M. mieostalis arises from the middle two fifths of the Mrg. glenoi- 

 deus, and its glenoid third gives origin to the M. meditrieeps. 

 Metacromion. — This is better shown in Fig. 44 and 45. 

 § 389. Processus Coracoideus—The coracoid process. — This, as better seen in Fig. !5, 



%>■„ "^m 

 '•^o ^'<^ 



•^-^.X 



V 





Fig. 43. — The Ental Aspect op an Adtilt Left 

 Scapula : x 1. 



