344 



HISTOLOGY. 



n --- ,--f-l 



FIG. 399. DIAGRAM OF A SECTION OF THE CEREBELLUM 

 ^ENGTHWISE OF THE 



JS 



LE 

 METHOD. 



CONVOLUTIONS. GOLGI'S 

 (Kolliker.) 



gr., Cells of the granular stratum; n., their neuraxons in 

 the granular layer and n'., in the grav stratum ; p., p'., 

 Purkinje's cells. (From Bailey's " Histology.") 



stainable particles found between the small cells (Fig. 400). Another 



part of the fibers forms bundles, parallel with the surface, running between 



the granular and ganglionic 

 strata in the sagittal direc- 

 tion; they send branches into 

 the gray layer. A small por- 

 tion of the granular stratum 

 is formed by the medullated 

 neuraxons of the cells in the 

 ganglion layer. 



The middle ganglionic 

 stratum consists entirely of a 

 single layer of very large 

 multipolar ganglion cells 

 called Purkinje's cells. Their 

 oval or pear-shaped bodies 

 send two large dendrites into 

 the gray stratum, where they 

 form an extraordinary arbor- 

 ization (Fig. 398). Their many 



branches do not extend in all directions but are confined to the sagittal plane, 



that is, to a plane at right angles with the long axes of the convolutions. 



When the convolutions are cut lengthwise, Purkinje's cells appear as in Fig. 



399. From the deep surface of the 



cell bodies the neuraxons arise, and 



as medullated fibers they pass through 



the granular stratum to the white 



substance. Within the granular layer 



they produce collateral fibers which 



branch and in part return to Purkinje's 



cell bodies. 



The outer gray stratum, of gray 



color, contains two sorts of nerve cells, 



the large and the small cortical cells. 



The large cortical or basket cells are 



multipolar ganglion cells the dendrites 



of which chiefly pass toward the sur- 

 face. Their long neuraxons, thin at 



first but later becoming thicker, run parallel with the surface in the 



sagittal plane. They send occasional collaterals toward the surface, and 



at intervals produce fine branches which descend and teiminate in baskets 



Eosine bodies. 

 !\ 



Nuclei of small cells of 

 the granular stratum. 



FIG. 400. FROM A THIN SECTION OF THE 

 CEREBELLUM OF AN ADULT. X 400. 



