STRUCTURAL ARRANGEMENTS OF CEREBRUM 429 



If sections of the cortex be stained by some method such as Weigert's 

 which displays medullated nerve fibres, sheaves of radial fibres may be 

 seen running from the white centre towards the surface and giving off a rich 



qrct.fr 



FIG. 220. Diagrammatic section of cerebral cortex. (From BARKER after STARR, 



STRONG, and LEAMING.) 



I, molecular layer with a, bi-polar cell ; II, layer of small 'pyramidal cells ; 

 III, layer of large pyramidal cells ; IV, polymorphous layer ; V, white matter. 



mesh work of fibres to the intervening portions of the grey matter. In addition 

 bands of tangential fibres are seen running parallel to the surface in certain 

 situations, viz. : 



