THE CRANIAL NERVES. 541 



opposite side. Their end-tufts arborize around the cells of nuclei in 

 the medulla oblongata. 



Properties. Stimulation of the small root gives rise to convulsive 

 movements of the muscles of mastication. Division of the nerve is 

 followed by a paralysis of these muscles. Contraction or paralysis of 



FIG. 250. INFERIOR MAXILLARY BRANCH or THE TRIGEMINAL NERVE, i. Branch 

 to the masseter muscle. 2. Filament of this branch to the temporal muscle. 3. 

 Buccal branch. 4. Branches anastomosing with the facial nerve. 5. Filament 

 from the buccal branch to the temporal muscle. 6. Branches to the external 

 pterygoid muscle. 7. Middle deep temporal branch. 8. Auriculo-temporal 

 nerve. 9. Temporal branches. 10. Auricular branches, n. Anastomosis with 

 the facial nerve. 12. Lingual branch. 13. Branch of the small root to the 

 mylo-hyoid muscle. 14. Inferior dental nerve, with its branches (15, 15). 16. 

 Mental branch. 17. Anastomosis of this branch with the facial nerve. (Hirsch- 

 feld.) 



the tensor tympani muscle would also be observed under the same 

 conditions. 



Functions. The fifth nerve, by virtue of its transmitting nerve 

 impulses from the periphery to the cerebral cortex, where they evoke 

 sensation, endows all the parts to which it is distributed with sensi- 

 bility; it also endows the muscles of mastication^ wift m6tilitv> 



