The Brain. 



227 



The Cranial Nerves and their Functions. i. The 



olfactory lobes extend forward under the fore part of the 

 cerebral hemispheres. They are the nerves of smell. 



- I, Olfactory 

 (Smell) 



Hypoglossal 

 12 (Tongue 

 Motor) 



II, Spinal 

 Accessory 



Fig. 88. The Base of the Brain, showing the Origin of the Cranial Nerves. 



2. The optic nerves, or nerves of sight, join each other 

 before reaching the brain. 



3. The third pair of cranial nerves controls the muscles of the eye- 

 balls. 



4. The fourth pair also controls eye muscled. 



5. Back of these is the larger fifth pair, the trigcminal. 

 This pair supplies part of the face, and sends branches to 



