HYOVERTEBKOTOMY. 



455 



Fig. 397.— Parotid Region— Middle Layer. 



P, parotid gland; D, digastrlcus muscle; Sh, occipito, or stylo-liyoideus, musole ; 

 Sm, Bterno-maxillaris muscle; P, thyroid gland; H, posterior border of ttie great 

 branch of the hyoid bone; 1, primitive carotid artery; 3, external carotid artery; 

 3, transversal artery of the face; 4, maxillo-muscular artery; 5, posterior auricular 

 artery; 6, thyro-laryngeal artery; 7, Jugular vein; 8, glosso-facial vein; 9, transversal 

 vein of the face; 10, maxillo-muscular vein; 11, anterior auricular vein; IS, posterior 

 aarlcnlar vein; 13, facial nerves; 14, anterior auricular nerve. 



into the jugular or its different branches. The principal nerves 

 of the parotid region are the facial, the pneumogastric, the spinal, 

 the superior cervical ganglion of the sympathetic, the great hypo- 

 glossus and the glosso-pharyngeal. These nerves, with the exception 

 of the facial, are situated on the external face of the pouches below 

 the long branch of the hyoid bone and the stylo-hyoideus. 



