MUSCLES OF THE BACK AND NECK. 



the back above the eighth, and into tiie two lowermost of the 

 neck, by as many tendons. 



Use. To extend the spine obhquely backwards. 



2. Multifulus Spina:. 



Arises from the side and spinous processes of the os sacrum. 



and from the posterior part of the os 

 ihum, where it joins with the sacrum : 

 from all the oblique and transverse 

 processes of the vertebrnc of the loins : 

 from all the transverse processes of 

 the vertebrae of the back, .and from 

 those of the neck, except the three 

 first, by as many distinct tendons- 

 which soon grow fleshy, run in an 

 oblique direction ; and are 



Inserted, by distinct tendons, into all 

 the spinous processes of the vertebra: 

 of the loins, of the back, and of the 

 neck, except the first. 



Use. When the different portions 

 of this muscle act on one side, thev 

 extend the back obliquely, or move it 

 laterally ; but if they act together on 

 both sides, they extend the vertebrae 

 backwards. 



On the posterior part of the neck 

 are. 



* Deep seated muscles of the back. 1. The common origin of the erector 

 spinpe muscle. Under which term is included three muscles, the sacro-lumba- 

 lis, longissimus dorsi, and spinalis dorsi. 2. The sacro-lumbalis. 3. The 

 longissimus dorsi. 4. The spinalis dorsi. 5. The cervicalis ascendens. 6. 

 The transversalis colli. 7. The trachelo-masloideus. 8. The complexus. 9. 

 The transversalis colli, showing its origin. 10. The semispinalis dorsi. 11. 

 The semispinalis colli. 12. The rectus posticus minor. 13. The rectus posticus 

 major. 14. The obliquus superior. 15. The obliquus inferior. 16. The mulii- 

 fidus spinsc. 17. The levatores costarum. 18. Intertransversales. 19. The 

 quadratus lumborum. 



