404 



CEREBELLUM. 



FIG. 113. 



the latter of which contains the falx cerehelli. The 

 posterior fissure, from its great depth, receives the name 



also of the valley, 

 or purse-like fis- 

 sure. The ante- 

 rior one is broad, 

 encloses the tu- 

 bercula quadri- 

 gemina, and over- 

 laps the fourth 

 ventricle. Each 

 hemisphere is 

 again divided in- 

 to lobes and lob- 

 ules by the various 

 sulci and furrows 

 on its surfaces. 

 Its surfaces are 

 two superior and 

 inferior. 



The superior 

 surface is marked 

 bylines or furrows 

 which are concen- 

 tric, presenting 

 the form of large 

 curves, parallel and concave forward. In the middle line, 



FIG. 113, A represents the superior surface of the Cerebellum. 1 1 Lat- 

 eral lobes or hemispheres. 2 2 Anterior or square lobes. 3 3 Posterior or 

 semicircular-shaped lobes. 4 4 Inferior semilunar lobe its internal part. 

 5 6 Superior vermiform process. 7 The deep posterior fissure, separating the 

 hemispheres, and covered by medulla oblongata, called the valley, or purse- 

 like fissure. 8 Pons Varolii. 9 Superior fossa of cerebellum. 



FIG. 113, B represents the inferior surface of the Cerebellum. 1 1 Lateral 

 hemispheres, or lobes. 2 2 External and front portions of anterior lobes. 3 3 

 Great horizontal fissure. 4 4 The posterior or semilunar lobes. 5 5 Gracilis, 

 or slender lobes. 6 6 Digastric, or anterior and external lobes. 7 7 Amyg- 

 daloid, or tonsillitic lobes. 8 8 Flocculus, or Pneumogastric lobes. 9 9 White 

 substance of floccujus. 11 Inferior vermiform process. 12 Nodule. 13 Pyr- 

 amid. 14 Pons Varolii. 15 15 Crura cerebelli. 



