i>00 



MUSCLES OF THE BACK. 



latter origin takes place by muscular slips, which indigitate with the ex- 

 ternal oblique muscle of the abdomen. The fibres from this extensive 



Fig. 1 14.* 



origin converge as they ascend, and cross the inferior angle of the scapula ; 

 they then curve around the lower border of the teres major muscle, and 

 terminate in a short quadrilateral tendon,f which lies in front of the tendon 

 of the teres, and is inserted into the bicipital groove. A synovial bursa is 

 interposed between the muscle and" the lower angle of the scapula, and 



* The first and second and part of the third layer of muscles of the back ; the first 

 layer being shown upon the right, and the second on the left side. 1. The trapezius 

 muscle. 2. The tendinous portion which, with a corresponding portion in the opposite 

 muscle, forms the tendinous ellipse on the back of the neck. 3. The acromien process 

 and spine of the scapula. 4. The latissimus dorsi muscle. 5. The dehoid. G. The 

 muscles of the dorsum of the scapula, infra-spinatus, teres minor, and teres major. * 7. 

 The external oblique muscle. 8. The glutens medius. 9. The glutei maximi. " 10. The 

 Jevator anguli scapulae. 11. The rhomboideus mir\or. 12. The rhomboideus major. 

 ] 3. The splenius capnis ; the muscle immediately above, and overlaid by the splemus, 

 is the complexus. 14. The splenius colli, only partially seen; the common origin of the 

 splenius is seen attached to the spinous processes below the lower border of the rhom- 

 boideus major. 15. The vertebral aponeurosis. 16. The serratus posticus inferior. 17. 

 The supra-spiriatus rquscle. 18. The infra-spinatus. 19. The teres minor muscle. 20. 

 The teres major. 21. The long head of the triceps, passing between the teres minor 

 and major to the upper arm. 22. The serratus magnus, proceeding forwards from its 

 origin at the base of the scapula. 23. The internal oblique muscle. 



\ A ma!! muscular fasciculus from the pectoralis major is sometimes found connected 

 with 'his tendon. 



