THE CEREBELLUM. 



513 



central lobe and the quadrilateral lobes, that attain their 

 greatest development in the cerebellum of Man (Huschke). 

 The cerebellum includes three different forms of grey matter: 

 (1) The cortex of the cerebellum, the most extensive and largest 

 of its centres; (2) the dentated nuclei, in the medulla of the 

 hemispheres ; and (3) the roof nuclei (Dachkerne) of Stilling, 

 in the medulla of the vermiform process. 



Fig. 259. 



Fig. 259. Transparent section from the cortex of the cerebellum of 

 Man. la, External portion of the pure grey layer ; 16, internal por- 

 tion of the pure grey layer, with fusiform cells and fibrse arcuitae ; 

 2, the layers of Purkinje's cells ; 3, the granule layers; m, medullary 

 lamina. 



1. The cortex of the cerebellum. Obersteiner has found that 

 the three layers of the cerebellar cprtex already recognized by 

 Purkinje are argumented in the foetus and in the cerebellum 

 of the new-born infant by an outermost layer of extremely 

 closely compressed formative cells, which at a later period 



L L 



