RHOMBOLDEI. LEVATOR ANGULI SCAPULA. 



207 



muscular or tendinous fibres, and must therefore act most immediately on the lower 

 angle. 



Relations. The greater part of the rhomboidei muscles is covered by the trapezius, 

 a small angular portion only of the rhomboideus major being subcutaneous in the interval 



Fig. 227. DEEPER VIEW OP THE MUSCLES OP 



THE TRUNK, SHOULDER AND HIP. (Allen 



Thomson, after Bourgery. ) | 



The trapezius, latissimus clorsi, deltoid, 

 glutens maxitnus and external oblique muscles 

 have been removed. The bones are lettered as 

 in the preceding figure. 



1, splenius capitis ; 1', lower end of splenius 

 colli ; 2, complexus near its insertion ; 3, levator 

 nnguli scapulee ; 4, rhomboideus minor ; above 

 it +, a part of the serratus posticus superior : 

 5, rhomboideus major ; 6, part of the longis- 

 simus dorsi ; 6', part of the tendons of inser- 

 tion of the ilio-costalis ; 7, part of the spinalis 

 dorsi ; 8, upper, and 8', lower part of the ser- 

 ratus posticus inferior ; 9, internal oblique 

 muscle ; 10, supraspinatus ; 11, infraspinatus : 

 12, placed upon the long head of the triceps, 

 points to the teres minor ; 13, teres major ; 14, 

 serratus magnus ; 15, gluteus inedius ; 16, pyri- 

 formis ; 17, portion of the obturator intern us ; 

 4- and +, superior and inferior gemelli ; 17', 

 the intrapelvic portion of the obturator interims ; 

 18, tendon of the obturator externus passing to 

 its insertion ; 19, quadratus femoris ; 20, upper 

 part of the adductor magnus. 



between the trapezius and latissimus dorsi : 

 the extent of this portion varies with the 

 position of the scapula, being increased 

 when the arm is raised from the side. 

 The rhomboidei cover the greater part 

 of the serratus posticus superior, and the 

 posterior scapular artery descends on their 

 deep surface. 



Varieties. Both rhomboid muscles are 

 liable to variations in the extent of their 

 vertebral and scapular attachments. The 

 division between the two is often indistinct, 

 and many authors describe the sheet as one 

 muscle. An additional muscle has been ob- 

 served running close to the upper border of 

 the minor, from the scapula to the occipital 

 bone, and has been called rhoiriboidcus occi- 

 fritalis after a similar muscle occurring in 

 some animals. 



The levator ang'uli scapulae arises 

 by slightly tendinous slips from the 

 posterior tubercles of the transverse 

 processes of the four upper cervical 

 vertebrae, between the attachments of 

 the splenius and scaleni muscles, and 



forms an elongated fleshy mass which is inserted into the base of the scapula from 

 the spine to the superior angle. 



Relations. The levator anguli scapulas is covered at its origin by the sterno-mastoid, and 

 at its insertion by the trapezius. Between these it is superficial in the posterior triangle of 



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