2 3 8 



PHYSIOLOGY. 



head and face, this nerve has motor fibers which control 

 the muscles of mastication. Unlike the other cranial 

 nerves, the trigeminal resembles the spinal nerves in 

 having two roots, one sensory, the other motor. 



Optic 

 (Sight) 



I, Olfactory 



(Smell) 



Eye Motor, 

 3,4,6 



Hypoglossai, 

 12 (Tongue 

 Motor) 



5, Trigeminal 

 (Face 

 Sensation) 



II, Spinal 

 Accessory 



Fig. 77. The Base of the Brain, showing the Origin of the Cranial Nerves. 



6. Back of and inside of the fifth pair is the sixth pair. 



7. The nerves of the seventh pair are larger, and are 

 farther back and outward. These are the facial nerves, 

 and control the muscles of the face and the facial expres- 



sion. 



