PAROTID GLAND 



259 



It is not possible to examine the relations of either the whole of the 

 internal jugular vein or the external carotid artery, or the whole of the 

 cervical portion of the internal carotid, until the parotid gland has been 

 removed, the infratemporal and submaxillary regions have been dissected, 

 and the posterior belly of the digastric and the styloid process have been 

 detached and displaced anteriorly. It is important, however, that the 

 internal jugular vein should be retained in position whilst these parts of 

 the dissection are being proceeded with ; the dissector should therefore 

 stitch the subclavian vein to the anterior surface of the scalenus anterior, 

 and the lower part of the internal jugular vein to the first part of the sub- 

 clavian artery, before proceeding to the study and removal of the parotid 

 gland. 



1. Posterior facial vein 



2. Sterno-mastoid 



3. Digastric 



4. Accessory nerve 



5. Internal jugular 



6. Stylo-hyoid 



7. Glossopharyngeal 



nerve 



Quadratus labii superioris 



Maxillary sinus 

 Zygomaticus 



Buccinator muscle 

 .Temporal muscle 



Tonsil 



Inferior alveolar vessels 

 and nerve 



Pharynx 



Stylo-pharyngeus 

 Stylo-glossus 

 Internal carotid 

 Sympathetic 

 Vagus and Hypoglossal 



FIG. 106. Transverse section through the Head at the level of the Hard 

 Palate. It shows the relations of the parotid gland, etc. 



Glandula Parotis. The parotid gland is wedged into a 

 more or less triangular interval, the parotid space, which is 

 bounded anteriorly by the posterior borders of the masseter, 

 the ramus of the mandible, and the internal pterygoid, and 

 postero-medially by the anterior border of the sterno-mastoid, 

 the mastoid process, the posterior belly of the digastric, the 

 styloid process, and the stylo- hyoid muscle. The space 

 extends upwards to the external acustic meatus, and it is 

 prolonged downwards into the carotid triangle, into which 



ii 17 a 



