PAROTID REGION 167 



maxillary veins, (3) all the terminal branches of the facial 

 nerve except the cervical, and (4) by the duct of the gland. 



As the dissector examines the parotid space he will note 

 that as the external carotid disappears under cover of the 

 posterior belly of the digastric it is placed so far forwards 

 that it is also under cover of the posterior border of the 

 mandible ; and it does not emerge from under cover of the 

 mandible until it reaches the level of the neck of the bone, 

 where it appears on the antero - medial surface of the 

 gland and divides into its two terminal branches. Further, 

 he will now readily recognise the impossibility of studying 



Anterior part of 



superior border',. 



Posterior facial vein 

 Area for neck of mandible ( 

 Transverse facial artery 



Superficial temporal artery 

 Internal maxillary artery 



Internal maxillary vein 

 Anterior border 



Communication to ex- _ 



ternal jugular vein "^M 



Posterior facial vein TT-^J External carotid artery 

 FIG. 62. Parotid Gland, antero-medial aspect. 



the upper end of the cervical part of the internal carotid, 

 the upper part of the internal jugular vein, and the last 

 four cerebral nerves, until he is in a position to reflect the 

 posterior belly of the digastric and the styloid process ; and 

 as both of them are, to a certain extent, under cover of the 

 mandible it is obvious that the mandible must be removed. 

 That will be done during the dissection of the temporal and 

 infratemporal regions, which must now be proceeded with. 



TEMPORAL AND INFRATEMPORAL REGIONS. 



Fascia Temporalis. The temporal fascia is a strong, 

 glistening membrane which is stretched over the temporal 

 fossa, binding down the temporal muscle. Its upper margin 



