364 



DISSECTION OF THE BACK. 



The transrersatis colli bends back the neck if the muscles of both sides 

 contract together; or laterally towards its own side, if only one is used. 



The trachelo-HHtstoirft'Hs will extend the head in concert with its fellow; 

 or by itself will turn the face to its own side, and then help to approximate 

 the head to the shoulder. 



The COMPLKXUS (fig. 118, D ) is internal to the prolongations from the 

 longissimus dorsi, and converges towards its fellow of the opposite side at 



Fig. 118. 



DISSECTION OF THE MUSCLES UNDERNEATH THK SPI-KNICS. 

 A. Longus colli. H. Soinispinalis dorsi. 



B. Transversalis colli. 

 c Trachelo-mastoid. 

 D. Complexus. 

 P. Splenius capitis, cut. 

 o. Splenius colli, cut. 



or. Occipital artery. 



1. Great occipital nerve. 



2. External piece of the second nerve. 



3. Outer piece of the third nerve. 



the occipital bone. Narrow at its lower end, the muscle arises by ten- 

 dinous pieces from the transverse processes of the upper six dorsal verte- 

 bra-, from the spine of the last cervical, and from the articular processes 

 of the cervical vertebra! as high as the third. The fleshy fibres pass up- 

 wards to be inserted into an impression between the curved lines of the os 

 occipitis, which reaches outwards nearly two inches from the occipital 

 crest towards the trachelo-mastoideus. 



The inner part of the cornplexus having two fleshy bellies with an in- 

 tervening tendon, is described often as a separate muscle with the name 

 biventer cervicts. 



