STRUCTURE OF THE CEREBRAL CORTEX 



573 



H 



FIG. 404. 



FIG. 405. 



..Tangential fibers (Vic 

 d'Azyr's ribbon) 



. .Striae of Bechterew 



. . Superradiary network (of 

 the second and third layers) 



. .Striae of Baillarger 



..Intermediary network (of 

 the third and fourth layers) 



. .Meynert's intracortical asso- 

 ciation fibers 



. . Subcortical association 



fibers 



FIG. 404. Schematic Diagram of the Different Layers of the Cerebral Cortex. (After Ramdn 

 y Cajal.) I, II, III, and IV, Layers of cortical cells. M, Molecular layer; pPy, layer of small 

 pyramidal cells; gPy, layer of large pyramidal cells; Pm, layer of polymorphous cells. 



FIG. 405. Schematic Diagram Showing the Arrangement of the Nerve Fibers in the Cerebral 

 Cortex. The dotted lines separate the four cellular layers of Cajal. 56, White substance. 



