Carotid 

 artery in 

 space : 

 course ; 



DISSECTION OF THE NECK. 



are the elevator muscles, viz., mylo-hyoid, digastric, and stylo-hyoid. 

 Connected with the back of the hyoid bone and the larynx are two 

 of the constrictor muscles of the pharynx. 



Vessels in the space. The carotid blood vessels and the internal 

 jugular vein ( 6 and7) occupy the hinder and deeper part of the space 

 along the side of the sterno-mastoid muscle ; and their course would be 



coverings 



FIG. 211. ANTERIOR TRIANGULAR SPACE OF THE NECK (QUAIN'S 

 <! ARTERIES"). 



1. Sterno-mastoid. 6. Common carotid artery divid- 



2. Sterno-hyoid . ing. 



3. Anterior belly of omo-hyoid. 7. Internal jugular vein. 



4. Thyro-hyokl. 8. External jugular vein. 



In the original drawing the sterno-mastoid is partly cut through. 



marked on the surfacebynlme from the sterno-clavicular articulation 

 to a point midway between the angle of the jaw and the mastoid 

 process. As high as the level of the cricoid cartilage they are buried 

 beneath the depressor muscles of the hyoid bone ; but beyond that 

 spot they are covered by the superficial layers over the space, and 

 by the sterno-mastoid muscle which, before it is displaced, conceals 

 f ,he vessels as far as the parotid gland. 



