546 



THE ORGANS 





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Fig. 364. — -Vertical Sections of Precentral or Motor Area of Adult Human Cortex. 

 Lefi, Weigert preparation showing fibre arrangement. Right, Arrangement of cells. 

 (Campbell.) B, Position of line of Baillarger, its position obscured by surrounding 

 wealth of fibres; R, radiary layer; S, supraradiary lajer; Z, layer of superficial tangential 

 fibres in molecular layer, dense and well defmed; i, molecular layer; 2, external granular 

 lajx'r (small pyramids), 3 (medium-sized) and 4 (large), pyramid layer; 5, internal 

 granuar layer, indistinct and with scattered granule or stellate cells; 6, ganglionic layer 

 (large deep pyramids); 7, multiform layer. 



