74 

 THE CENTRAL NERVOUS SYSTEM. 



LABORATORY WORK FOR THE--'-^-- WEHK. 



References: IV . >i/i x,^ ^^y^.U 

 Points for Quiz : 



Laboratory Report : 



Due : 



Go to the delivery desk for (a) assigned slide 177 ; (b) par- 

 affin sections 172, 176; (c) sections already stained, 169, 170, 174, 

 I 75 > (*O I 7 I an< i J 73 will De given you during the first period. 



CEREBELLUM. 



Gross Preparations. Examine the gross preparations, noting 

 (a) the parts of the cerebellum the vermis, lateral hemispheres, 

 and the flocculus, comparing man and the different animals shown ; 

 () the lodes of the cerebellum and the folia, their size and direction ; 

 () the three peduncles of the cerebellum by which it is connected 

 with the rest of the brain and myel. 



169. Cerebellum. Cat. Sagittal section of the vermis ; 

 vom Rath's fluid ; stained in toto in' paracarmine ; collodion ; sec- 

 tions JJL. 



Note the deep division into lobes and these into folia. As con- 

 stituting the cerebellum, recognize (a) the central core of alba 

 (fibers) extending into the lobes and folia, (b) the covering cinerea 

 cortex. Observe the layers of the cortex, the grouping of the 

 cells of the granular layer, the size of the Purkinje cells, the rela- 

 tively small number of cells in the molecular layer. Remember the 

 real extent of the dendrites of the Purkinje cells, the destination of 

 the neurites of the Purkinje cells and granules, and compare 

 with 171. 



170. Cerebellum. . Transection (in part) ; Wei- 

 gert's hematoxylin method ; collodion ; sections /^ ; now in 

 95% alcohol. Clear and mount in alkaline balsam. 



This preparation will illustrate the ento-cinerea of the cerebel- 

 lum the nucleus dentatus and the nuclei of the roof, as well as the 



