128 ANATOMY. 



Olivary Body, behind the pyramid, from which it is separated by the groove 

 of the hypoglossal nerve. It contains a capsule of gray matter in its cen- 

 tre, the Corpus Dentatum. 



Lateral Tract, continuous with the lateral column of the spinal cord, lies 

 behind the olivary body and in front of the restiform. 



Restiform Body, the posterior lateral portion of the medulla, also called the 

 Fasciculus Cuneatus. 



Posterior Pyramid, or Fasciculus Gracilis, the most posterior portion, is 

 formed by the posterior median column of the spinal cord. It diverges 

 from its fellow at the apex of the 4th ventricle and forms the lateral 

 boundary of the Calamus Scriptorius. 



What is the Cerebellum ? It is that portion of the brain situated in the 

 inferior occipital fossae, beneath the posterior lobes of the cerebrum. It is an 

 oblong flattened ganglion, divided into two lateral hemispheres, and a central 

 portion, the Vermiform Process. 



Name the Fissures of the Cerebellum. They are 3 in number, 2 ver- 

 tical and i horizontal, viz. 



Incisura Cerebelli Anterior. Great Horizontal Fissure, from which 



Incisura Cerebelli Posterior. secondary fissures originate. 



Name the Points on the surfaces of the Cerebellum. They comprise 15 

 lobes, 2 commissures, and 3 projections, as follows ; 

 On the upper surface of each hemisphere, 



Anterior or Square Lobe. Posterior or Semilunar Lobe. 



On the under surface of each hemisphere, from before backwards, 



Flocculus, Stib-peduncular Lobe, or Pneumogastric Lobule. 



Amygdala Lobe, or Tonsil, projects into the 4th ventricle. 



Digastric Lobe. Slender Lobe. Posterior Inferior Lobe. 



On the vermiform process are the 



Lobulns Centralis. \ Pyramid. \ 



Monticulus Cerebelli. > superiorly. Uvula. V inferiorly. 



Commissura Simplex. ) Commissura Brevis. ) 



The Vallecula, or valley of the cerebellum, is the central depression on its 



under surface between the two lateral hemispheres. 



Name the Peduncles of the Cerebellum, They are 3 in number on each 

 side, and from below upwards are as follows : 



Processus e Cerebello ad Medullam, to the medulla oblongata. 

 Processus e Cerebello ad Pontem, connect the hemispheres. 

 Processus e Cerebello ad Testes, to the cerebrum. 



Describe the Gray Matter of the Cerebellum. It occupies the surface of 



