MUSCLES OF THE BACK. 



175 



deus major by a slight cellular interspace. It arises from the spi- 

 nous process of the last cervical vertebra and ligamentum nuchae, 

 and is inserted into the edge of the triangular surface, on the pos- 

 terior border of the scapula. 



Fig. 76 * 



* 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 acromion pro- 

 cess and spine of the scapula. 4. The latissimus dorsi muscle . 5. The deltoid. 6. 

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

 7. The external oblique muscle. 8. The gluteus medius. 9. The glutei maximi. 10. 

 The levator anguli scapulae. 11. The rhomboideus minor. 12. The rhomboideus 

 major. 13. The splenius capitis ; the muscle immediately above, and overlaid by the 

 splenius, 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 rhomboideus major. 15. The vertebral aponeurosis. 16. The serratus posticus 

 inferior. 17. The supra-spinatus muscle. 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, pro- 

 ceeding forwards from its origin at the base of the scapula. 23. The internal oblique 

 muscle. 



