74 



Type of Cell Lamination 



[CHAP. 



sclerosis, but that, on the other hand, in diseases involving the sensory neurones, such as 

 Tabes dorsalis, and after amputations, they undergo profound changes. 



Fio. 6. Drawings of two small precentral giant cells (the upper ones in the figure) can here be compared with 



drawings of three of the largest cells to be found in the postcentral gyrus. 

 The difference is mainly one of size but other points of distinction are alluded to in the text. 

 Both sets of cells come from the mesial surface of the hemisphere (paracentral lobule), the precentral cells from 



before, the postcentral from behind, the level of the fissure of Rolando. 

 Crush specimens, thionin staining. Leitz ocular drawing apparatus. Zeiss apochromatic oil immersion 2 mm. lens. 



