NERVOUS SYSTEM 6 1 



3. The Restiform Bodies are the slightly enlarged 

 portions of the medulla which form the connec- 

 tion between the posterior pyramids and the infe- 

 rior peduncles of the cerebellum. 



4. The ninth pair of cranial nerves, the Glosso- 

 pharyngeal, leave the ventral side of the medulla 

 by several roots. (Plate VII., A.) 



5. The tenth pair of cranial nerves, the Vagus, or 

 Pneumogastric, arise just posterior to the ninth, by 

 several roots. (Plate VII., A.) 



6. The eleventh pair of cranial nerves, the Spinal 

 Accessory, arise by a series of roots from the sides 

 of the spinal cord and medulla oblongata. They 

 run anteriorly and enter the cavity of the skull. 

 (Plate VII., A.) 



7. The twelfth pair of cranial nerves, the Hypo- 

 glossal, arise by several roots from the ventral sur- 

 face of the medulla, between the anterior pyramids 

 and the olivary bodies. (Plate VII., A.) 



INTERNAL ANATOMY OF THE BRAIN. 



Slice off the upper part of the right hemisphere to 

 a level with the corpus callosum. 



1. The Gray Matter will be seen as a narrow, con- 

 voluted, cortical layer, surrounding the inner or 

 medullary portion, the White Matter. (Plate VII., 



B.) 



2. The Corpus Callosum can now be more clearly 

 seen and its fibres traced into the cerebral lobes. 



