i86 



HEAD AND NECK 



30 i 2 3 4 



29 



23 



FlG. 68. Deep dissection of the Infratemporal and Submaxillary Regions. 



Masseter muscle. 

 Mandible. 



Stylo-glossus muscle. 

 Stylo-pharyngeus muscle and glosso- 



pharyngeal nerve. 

 Parotid gland. 



Stylo-hyoid and digastric muscles 

 External maxillary artery. 

 Lingual artery. 

 Internal carotid artery and descending 



branch of hypoglossal nerve. 

 Internal jugular vein. 

 External carotid artery. 

 Superior thyreoid artery. 

 Sterno-mastoid muscle. 

 External laryngeal nerve. 

 Sterno-hyoid muscle. 

 Omo-hyoid muscle. 

 Thyreo-hyoid muscle. 



18. Laryngeal branch of superior thyreoid 



artery and internal laryngeal nerve. 



19. Hyoglossus muscle. 



20. Deep part of submaxillary gland and 



duct of gland. 



21. Anterior belly of digastric muscle. 



22. Submental branch of external maxillary 



artery. 



23. Mandible. 



24. Inferior alveolar artery and nerve. 



25. Mylo-hyoid nerve. 



26. Mylo-hyoid muscle. 



27. Position of last molar tooth of man- 



dible. 



28. Lingual nerve. 



29. Internal pterygoid muscle. 



30. Inferior alveolar nerve, and mylo-hyoid 



branch with inferior alveolar artery. 



It is superficial to the internal jugular vein, the internal 

 and the external carotid arteries, the external maxillary artery, 



