A. Section of normal cerebellum of rabbit. B. Section of cerebellum of rabbit 

 killed immediately after 25 minutes of fright. C. Section of cerebellum of rabbit after 

 40 minutes of fright, killed after 2 hours of rest. D. Section of cerebellum of rabbit 

 frightened twice a day for two weeks. 



FIG. 18. EFFECT OF FRIGHT, ACUTE AND CHRONIC, ON THE BRAIN-CELLS 

 OF A RABBIT. 



In B, the first effect of fright is seen in the hyperchromatic condition of the Purkinje 

 cells to meet the increased demand of an emergency; this condition being followed by 

 chromatolysis or disappearance of Nissl substance, as is evident in the cells of C. In D, 

 the lasting effects of repeated fright are seen in the high percentage of fatigued and 

 exhausted cells. 



