352 MAN AN ADAPTIVE MECHANISM 



Section of normal human Section of cerebellum of a soldier 



cerebellum. who had suffered from hunger, thirst 



and loss of sleep ; had made the ex- 

 traordinary forced march of 180 miles 

 from Mons to the Marine ; in the 

 midst of the greatest battle in history 

 was wounded by the explosion of a 

 shell ; lay for hours waiting for help, 

 and died from exhaustion soon after 

 reaching the ambulance. Compare 

 the faded-out exhausted Purkinje 

 cells with the Purkinje cells in A. 

 Fio. 86. EFFECTS OF EXTREME ACTIVATION ON THE BRAIN-CELLS OF A 



SOLDIER. 

 (From photomicrographs, X 310.) 



