MUSCLES OF THE BACK. 



349 



it directly backwards ; and the inferior ascending fibres draw it 

 obliquely downwards and backwards. 



Fig. 90.* 



* Muscles of the back, the supeihcial being shov\n upon the right, and the 

 deeper seated 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 process 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. S. The gluteus medius. 9. The 

 glutei raaximi. 10. The levator anguli scapulse. 11. The rhumboideus 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-spi- 

 natus muscle. 18. The infra-spinatus. 10. 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. 



30 



