EFFECTS OF IRRADIATION ON BEHAVIOR AND BLOOD 703 



— Food and water intake was depressed in the immediate postirradiation 

 period. 



— Random cage activity was depressed 2 or 3 weeks after irradiation. 

 — The results of a test of object manipulation were equivocal. 

 — The number of red blood cells and the amount of hemoglobin dropped 

 rather precipitously and remained depressed, to some degree, for weeks. 

 — Total leucocytes, neutrophils, and lymphocytes were markedly altered at 

 this level of radiation damage. A distinctive sequence of increase and de- 

 crease for each cellular component occurred. A late neutrophilia was mani- 

 fested 6 to 7 weeks after irradiation. Its degree appeared to be inversely 

 proportional to the decrease in the preceding weeks and directly proportional 

 to the radiation dosage. 



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