THE CEREBELLUM 207 



zones: a superficial molecular layer, a layer of Purkinje cells, and a subjacent 

 granular layer. 



The cells of Purkinje have large flask-shaped bodies and are arranged in an 

 almost continuous sheet, consisting of a single layer of cells and separating 

 the other two cortical zones (Fig. 150). They are more numerous at the summit 

 than at the base of the folium. Each has a pyriform cell body. The part 

 directed toward the surface of the cortex resembles the neck of a flask and from 



Fig. 150. Semidiagrammatic transverse section through a folium of the cerebellum. (Golgi 

 method): A, Molecular layer; B, granular layer; C, white matter; a, Purkinje cell; b, basket cells; 

 d, pericellular baskets, surrounding the Purkinje cells and formed by the arborizations of the 

 axons of the basket cells; e, superficial stellate cells;/, cell of Golgi Type II; g, granules, whose 

 axons enter the molecular layer and bifurcate at i; h, mossy fibers; j and m, neuroglia; n, climb- 

 ing fibers. (Cajal.) 



it spring one or two stout dendrites. These run into the molecular layer and 

 extend throughout its entire thickness, branching repeatedly. This branching 

 occurs in a plane at right angles to the long axis of the folium; and it is only in 

 sections, taken in this plane, that the full extent of the branching can be ob- 

 served. In a plane corresponding to the long axis of the folium the dendrites 

 occupy a more restricted area (Fig. 151). In this respect the dendritic ramifica- 

 tions resemble the branches of a vine on a trellis. From the larger end of the 

 cell, directed away from the surface of the cortex, there arises an axon which 



