82 



A MANUAL OF ANATOMY. 



Behind, by the anterior border of the trapezius muscle. 



This quadrilateral space is divided obliquely from above 

 downward and forward by the sternomastoid muscle into 

 two triangles, the anterior and posterior cervical triangles. 



The anterior triangle is further subdivided by the poste- 

 rior belly of the digastric and the anterior belly of the 

 omohyoid muscles into three triangles. 



Diag. 7. A DIAGRAM OF THE TRIANGLES OF THE NECK. (/. S. H.) 



These are from above downward, the submaxillary, 

 superior and inferior carotid triangles. 



The Submaxillary Triangle is bounded by the border 

 of the lower jaw and the line from its angle to the mastoid 

 process, by the posterior belly of the digastric (and the 

 stylohyoid), and by the median line. (The student can 



