

TEMPORAL AND INFRATEMPORAL REGIONS 179 



nerve gives off the nervus spinosus and the nerve to the 

 internal pterygoid muscle, and, at a slightly lower level, it 

 divides into an anterior division, and a posterior division 

 which almost immediately breaks up into its lingual, alveolar 

 and auriculo-temporal divisions. 



The nervus spinosus is a very slender twig which enters 

 the cranium by accompanying the middle meningeal artery 



Tympanic plexus 



Tympanic branch of 

 glosso-pharyngeal 



Chorda tympani / 



Auriculo-temporal 

 Inferior alveolar nerve 



. Anterior deep temporal 

 uccinator nerve 



Stylo-glossus 

 Mylo-hyoid nerve 



Communication to hypoglos 



Submaxillary ganglion 



Hyoglossus 



Genio-glossus 



Mylo-hyoid muscle 

 Jranches of mylo-hyoid nerve -f 



I si-- 



ental branch 

 Incisive branch 

 astric 



FIG. 66. Diagram of Mandibular Nerve. (By Prof. A. M. Paterson. ) 

 The tongue has been separated from its attachments and raised above 

 the level of the body of the mandible. 



1. Ganglion geniculi 



2. Carotico-tympanic nerve 



6. Symp. root of otic ganglion 

 7.- Otic ganglion 



12. Anterior division 



13. Deep temporal 



3. Lesser superficial petrosal . 8. Nerve to tensor tympani j 14. Lingual nerve 



nerve 9. Nerve to tensor veli palatini 15. Masseteric branch 



4. Internal carotid artery 10. Nerve to internal pterygoid 16. Pterygoid branch 



5. Middle meningeal artery ! n. Mandibular nerve trunk 



through the foramen spinosum. It supplies the dura mater, 

 and sends a twig into the tympanum. 



The nerve to the internal pterygoid will be found, passing 

 forwards, under cover of the posterior border of the upper 

 end of the internal pterygoid muscle. In close relation to 

 its commencement is the otic ganglion. 



The anterior division arises from the trunk of the man- 

 dibular nerve about 5 mm. below the foramen ovale. It 

 consists almost entirely of motor fibres derived from the 



m 12 a 



