CRANIAL NERVES 



187 



In cases where the profundus is reduced the maxillary nerve extends 

 into its territory. In the higher vertebrates it comes into relations 

 with the sphenopalatine ganglion which also receives sympathetic 

 fibres. 



The mandibular nerve, going to the lower jaw, runs on the outer 

 side of Meckel's cartilage; in the higher forms, with the development 



Fig. 194. — Ventral view of brain and cranial nerves of Iguana, after Fischer. I- 

 A'//, cranial nerves; 1-3, first three cervical nerves; gp, petrosal ganglion; i, Jacobson's 

 commissure; h, hypoglossal; n, nasalis ramus of V; rf, ramus frontalis of V; sy, sym- 

 pathetic. 



of bone, it becomes enclosed in the jaw. It carries motor elements 

 which innervate the muscles of the jaw and also sensory fibres which 

 supply the lips, teeth and, in the mammals, part of the face, and 

 in mammals and some reptiles it sends a branch (lingual nerve) into 

 the tongue. In the mammals there is associated with it an otic and a 

 submaxillary ganglion, with contributions from the sympathetic 

 system. 



