GENETIC TYPE AND THE ENDOCRINES 715 



tude of the C-R was observed on the second day after the 

 injection of anterior lobe extract was begun, but this effect 

 diminished as the therapy was continued, and soon disap- 

 peared altogether. The reflex was aroused slightly during 

 the administration of the two extracts simultaneously, but 

 this again was quite transient. After the cessation of the 

 treatment the response disappeared completely. 



BX BASSET BHEPHERD ^^ 



^extract dally for 10 day> 



P777* Adntnlctratlon of 3/4 cc. 



ReBOVal of ,mt 

 and posterlo: 

 pituitary 



Text-figure 127. Chart showing the effect of complete hypophysectomy and of 

 the subsequent administration of anterior pituitary extract and posterior pituitary 

 extract on the conditioned motor reflex in dog 492. Note the almost complete 

 cessation of the formerly vigorous conditioned defensive reaction following the 

 operation. Neither gland substance had any pronounced effect on the dormant 

 reaction. 



It is important that although the two different types of 

 conditioned reaction deteriorated to a marked degree after 

 the operation, the animal's behavior in the kennel, towards 

 both food and punishment, did not appear to be affected. 

 When a pan of food was held for the dog to see and smell, 

 he showed every sign of being hungry, that is, stared fixedly 

 at the food and licked his chops. When the pan was placed 

 upon the floor he advanced quickly to it and began to bolt 

 the food. Evidence of the anticipation of punishment was 

 equally clear, as illustrated by the fact that the animal always 

 crouched and crawled slowly toward the attendant at a sharply 

 spoken word of command or at the sudden clapping of the 



