52 



Precentral or Motor Area 



[CHAP. 



of the hemisphere, cells were seen, which we had not the slightest hesitation in calling most exquisite 

 examples of the condition "reaction h distance." 



Some of these cells have been faithfully drawn with a Leitz apparatus and are illustrated in figure 3. 

 On looking at sections in which such cells were present, they immediately arrested attention, even under 



- ... . 



- >: ,( .-? n 



v . 



Fio. 3. B^actiou a distance. 



Three cells showing reaction il distance in typical form, with a normal giant cell from the same region for comparison. 

 The dislocation of the nucleus, the persistence of chromophilic elements at the upper end of the cell and destruction of 



the same bodies elsewhere, the alteration in shape, and the loss of processes, are points to be specially noticed. 

 The dotted mass extending across the base of each cell is pigment. 

 Zeiss Apochrom, 2 mm. and Leitz drawing apparatus. 



a low power lens, l>y their relatively large size, their curious shape and their general pallor. Examined 

 more closely under a high power, they were found to present the following characters. Disintegration of 

 the chromophilic elements was pronounced, and the place of the large, richly-stained, deep purple elements, 



