GREAT VESSELS AND NERVES OF NECK 301 



A meningeal branch associates itself with the internal 

 jugular vein, and can be followed upwards upon it to 

 the jugular foramen, through which it passes into the 

 cranium. 



Arteria Auricularis Posterior. The posterior auricular 

 artery will be found above the level of the posterior belly of 

 the digastric, and, like the occipital, it takes origin from the 

 posterior aspect of the external carotid artery. In the first 

 part of its course it is placed deeply, and runs upwards and 

 posteriorly between the styloid process of the temporal bone 

 and the postero-medial surface of the parotid gland to reach 

 the interval between the mastoid process and the back of 

 the auricle. Then it joins the posterior auricular nerve. 

 Its further course has been studied in the dissection of the 

 scalp (p. 157). 



This portion of the posterior auricular artery gives off 

 (i) muscular twigs ; (2) a few branches to the parotid gland; 

 and (3) the stylo-mastoid artery. 



Arteria Stylomastoidea. This is a slender vessel which 

 enters the stylo-mastoid foramen. In the interior of the tem- 

 poral bone it has an extensive distribution. It supplies twigs 

 to the mastoid cells and to the tympanic cavity and is carried 

 onwards in the canalis facialis (O.T. Fallopian) to anastomose 

 with the petrosal branch of the middle meningeal. 



Arteria Maxillaris Interna. The commencement of the 

 internal maxillary artery, from the termination of the external 

 carotid, between the neck of the mandible and the antero- 

 medial surface of the parotid gland, has been seen already, and 

 the artery has been traced through the infratemporal region 

 to the pterygo-palatine fossa, where its terminal branches will 

 be dissected at a later period. 



Arteria Temporalis Superficialis. Like the internal 

 maxillary, this artery commences between the neck of the 

 mandible and the antero-medial surface of the parotid gland. 

 It passes upwards and, as it emerges from under cover of 

 the upper end of the parotid, it crosses the posterior end 

 of the zygomatic arch and enters the superficial fascia of the 

 scalp, in which it ascends on the superficial surface of the 

 temporal fascia, and anterior to the auricle it breaks up 

 into two branches, frontal and parietal. These anastomose 

 with each other and with their fellows of the opposite 

 side. The frontal anastomoses with the supra-orbital and 



