82 LABORATORY METHODS OF 



The five layers of the cerebrum are the molecular 

 layer, the small pyramidal layer, the large pyramidal 

 layer, the layer of irregular cells and the layer of spin- 

 dle-shaped cells. 

 Exercise N~o. 47. Make a T. S. of the cerebrum. 



Technic : same as the spinal cord. 



1. Search for the layer of the granular cells, large 

 and small pyramidal cells, and the layer of irregular 

 and oval cells. 



2. Examine the medulla of the cerebrum ; note the 

 presence of connective tissue cells, or glia cells. 



3. Search for spider and Cajal cells. In the first 

 layer will be found the cells of Cajal; in the second 

 layer will be found the small pyramidal cells; in the 

 third layer will be found the large pyramidal cells; 

 in the fourth layer will be found the irregular cells; 

 in the fifth layer will be found the oval cells. 



CEREBELLUM. 



The cerebellum is composed of three layers: The 

 outer molecular, the middle granular or rust colored 

 layer, and the inner medullary tract. The outer layer 

 consists of three varieties of nerve cells: the cells of 

 Purkinje, the polypo-lar or multipolar, and the stellate 

 cells. The middle layer contains two varieties of cells : 

 the granular cells and the short stellate cells. The 

 inner layer contains two varieties of cells : the centrifu- 



