ENDOCRINE SYSTEM 



163 



Effect on the growth of the brain and spinal cord (Hammett, '23). 

 In "Thypars" there is a marked retardation of the growth of the 

 brain and cord. The inhibition of the growth of the brain is much 

 greater than that of the cord. The results are more marked in 

 the female than in the male. Table 117. 



In "Parathys" there appears a slight but significant retardation 

 of the growth of the cord and of the female brain. The growth 



TABLE 117 



The relative per cent increments of the body and the several organs from 100 to 

 150 days of age using the controls = 100 per cent, as base 



of the male brain is not retarded. In general the inhibition is 

 very much less than that caused by the loss of the thyroid secre- 

 tion, but the effect on the females is greater than that on the males. 



Effect on the reproductive system (Hammett, '28). "Thypars." 

 In males the growth of the testes and epididymis is slightly 

 retarded. 



In females the ovaries and uterus not only stop growing, but 

 actually retrogress and lose weight. The ovaries are the more 

 affected. 



