FACE AND FRONTAL REGION OF HEAD 31 



nor posteriorly as far as the nasal notch of the maxilla. The 

 interval between it and the bone is filled in by fibrous tissue 

 in which one or two small islands of cartilage (cartilagines 

 minores vel sesamoideae) appear. Anteriorly, the bent part 

 of cartilage comes into contact with its neighbour and forms 

 the point of the nose. The medial part of the cartilage is a 

 narrow strip which lies against the lower part of the septal 

 cartilage, and projects slightly below it, so as to support the 

 margin of the nostril upon the medial side. Its posterior 

 extremity is turned slightly laterally. 



SIDE OF THE NECK. 



On the fourth day after the body is brought into the room 

 it is placed upon its back, and the dissectors of the head and 

 neck should examine the side of the neck and commence the 

 dissection of the posterior triangle. 



The side of the neck is bounded below by the clavicle, 

 above by the lower border of the mandible, the mastoid 

 portion of the temporal bone, and the superior nuchal line of 

 the occipital bone. Anteriorly it extends to the median plane, 

 ycA posteriorly to the anterior border of the trapezius muscle. 

 It is divided into anterior and posterior parts, the anterior 

 and posterior triangles , by the sterno- mastoid muscle. If 

 the head is pulled over towards the opposite side, the sterno- 

 mastoid muscle will be seen descending from the mastoid 

 portion of the temporal bone and the superior nuchal line of 

 the occipital bone, to the upper border of the sternal third 

 of the clavicle and the anterior surface of the manubrium 

 sterni. 



In the lower part of the posterior region, posterior to the 

 sterno -mastoid and above the Convex middle third of the 

 clavicle, there is a depression called \hzfossa supraclavicularis 

 major, to distinguish it from the fossa supraclavicularis minor, 

 which lies between the sternal and clavicular heads of the 

 sterno-mastoid, above the sternal end of the clavicle. The 

 fossa supraclavicularis major overlies the brachial plexus, the 

 third part of the subclavian artery, and the supra -clavicular 

 lymph glands ; and the fossa supraclavicularis minor indicates 

 the position of the lower part of the internal jugular vein. 



