

\ /:/, 1 



12. Tm'lftlt Pair, or Grrnl /A//y -,//, ,*W -V' 



(Figs. 111,22; 81 12.) 



Tin' f/rtvi/, or simply the Jiypoglos^al nerve, is exclusively motor, und 

 animates the muscles of the tongue. 



Fig. :;;_. 



DEEP NERVES OK Till: HEAD. 



1, Superior maxillary nerve at its exit from the foramen laccruin ; '2. Trunk of the 

 masseteric ; 3, Trunk of the subzygomatic ; 4, Buccal ; 5, Lingual or gu.st;it<iry : 

 6, Chorda tympani ; 7, Inferior maxillary, cut near where it enters the maxillo- 

 dental canal ; 8, Trunk of the mylo-hyoideus ; 9, Pterygoid ; 10, Glosso-pharyngeal ; 

 11, Its pharyngeal branch; 12, Its lingual branch; 13, Pneumogastric ; 14, 

 Superior laryngeal branch of that nerve; 15, Its pharyngeal branch ; It;, Spinal 

 accessory of Willis ; 17, Great hypoglossal ; 18, Origin of the cervical cord of the 

 great sympathetic; 19, The same after its union with the pncumogastric. A, 

 Common carotid artery ; B, Accessory thyroid artery ; (7, Thyro-laryngeal artery ; 

 I), Origin of the internal carotid artery the vessel is concealed by the guttural 

 pouch; E, Occipital artery; .F, External carotid artery; (/, Internal maxillary 

 artery; //, Pharyngeal artery (drawn too large); /, External maxillary art i-ry : 

 J, Lingual artery; K^ Origin of the maxillo-muscular artery; L, Post.rior 

 auricular artery ; M, Trunk or origin of the superficial temporal artery ; O, 

 Inferior dental artery ; /', Posterior deep temporal artery ; Q, Anterior deep 

 temporal artery ; B, Maxillary gland ; , Wharton's duct ; T, Sublingual glan-l. 

 The letter N placed at the upper end of the large cornu of the hyoid bone has 

 no signification. 



Origin. It originates at tlie lower face of the medulla oblongata, from 



