THE XKRVOUS SYSTEM 



543 



root cells of cord and brain. The medium and small cells have 

 fewer chromophilic bodies which are often in the shape of irregular 

 masses, either near the periphery of the cell or around the nucleus. 

 The neurofibrils vary in their arrangement according to the shape of 

 the cell. 





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Fig. 362. — Vertical Sections of Calcarine Area of Adult Human Cortex. Left, 

 Weigert preparation showing fibre arrangement. Right, Arrangement of Cells. 

 (Campbell) G, Line of Gennari; R, radiary layer; S, supraradiary layer; Z, Layer of 

 superficial tangential fibres in molecular layer;' i, molecular layer; 2, external granular 

 small pyramid) layer; 3, pyramid layer; 4, (large granules) and 5 (small granules), 

 (nternal granular layer; 6, ganglionic layer (containing solitary cells of Meynert); 7, 

 imultiform layer. 



The neuroglia cells and fibres are in general similar to those in 

 other parts of the nervous system. 



The cells of the cortex are arranged in layers which have the same 

 general character throughout, but in various regions exhibit variations 



