296 



NORMAL HISTOLOGY. 



like arborization, the terminal ramification of the main process itself ending 

 in like manner. By this arrangement each basket-cell is brought into close 



relation with several of the 

 Purkinje cells, an associa- 

 tion probably of conse- 

 quence in insuring coor- 

 dination. 



The small cortical 

 cells include two varieties. 

 One is represented by neu- 

 rones of about the size of 

 the basket-cells, or slightly 

 smaller, provided with few 

 dendrites and an axone dis- 

 tinguished by its delicacy, 

 great length and tendency 

 to ramify in curves or even 

 loops. The other kind is 

 somewhat smaller and pos- 

 sesses axones that are short 

 and soon branch. 



The granule layer, 

 of a rust-brown tint when 

 fresh and deeply colored 

 in stained preparations, is 

 thickest on the summit of 

 the folia and thinnest op- 

 posite the bottom of the 

 fissures. While sharply defined from the overlying molecular layer, it is 



Molecular layer 



anule layer 



White matter 



Moss-fibres 



Axones of Purkinje cells 



Climbing fibres 



FIG. 344. Diagrammatic reconstruction of part of folium, illustrating relations of nerve-cells and fibres 

 of cerebellar cortex ; transverse (left) and longitudinal (right) cut surfaces of folium are shown ; a, Pur- 

 kinje cells ; 6, granule cells ; c, small cortical cells ; d, basket-cells ; e, large association cell of type II. 



less clearly demarcated from the medullary substance, with which it some- 



FiG. 343. Purkinje cell from human cerebellar cortex; silver 

 preparation ; a, axone. X 180. 



