SECTION XIX 



THE CEREBELLUM. THE PROTECTIVE MECHAN- 

 ISMS OF THE NERVOUS SYSTEM 



CHAPTER LVII 

 THE CEREBELLUM 



The Structure of the Cerebellum. — Anatomists have been accus- 

 tomed to divide this organ into a median lobe or vermis and a right 

 and left lateral lobe, or hemisphere. Bolk/ however, does not recog- 



Sulcus prepyramidah 



Uvula 



Tonsilla 



Lobulua biventralit 



Sutctn intragracilis 

 Sulcus poatgracUia 

 Svlcus horizontalis magnua 



Fig. 351. 



Lobulus postero-superior 

 Lobulua semilunaris inferior 

 Lobulus gracilis posterior 

 Lobulua gracilis anterior 

 Pyramis 



View of Cerebellum from Below. (J. Symington.) 



nize this transverse arrangement, but advocates a division in the 

 anteroposterior direction. Thus, it is stated that the sulcus primarius 

 separates this organ into an anterior and a posterior portion. The 

 former embraces the superior vermis, the monticulus and lobus quad- 

 ratus anterior, while the latter includes the remaining portion of this 

 organ, namely, the lobulus simplex, lobulus medianus posterior (ver- 

 mis inferior) and the lobuli complicate 



^ Das Cerebellum der Saugetiere, Jena, 1906. 

 706 



