ANOCIATION 



r te ft^5&Q 







.* *v 



l*> 



"S 



. . 



A. B. 



Section of normal cerebellum Section of cerebellum of dog after 



of dog. surgical trauma. . 



FIG. 54. EFFECT OF SURGICAL TRAUMA ON THE BRAIN-CELLS OF A DOG. 



Compare the hypochromatic appearance of the Purkinje cells in B with 

 the deeply colored, intact cells in A. 



(From photomicrographs, X 310.) 



Since protection of the patient against fear-producing 

 stimuli before the operation depends largely upon the 

 details of his reception at the hospital, no less than 

 upon his reception in the surgeon's own office, and upon 



