712 



O. I). ANDERSON 



to 3). The values were not enhanced during the anterior 

 lobe extract; rather they showed a further decrease (to 1), 

 and were unchanged when both substances were given (1). 

 The magnitude in the terminal phase was, of course, zero. 



The results are shown graphically in plates 110 and 111 

 and text-figures 126 and 127. Figure 5 (pi. 110) shows a 

 typical conditioned salivary reflex in the animal in the normal 

 period. Note the sudden, alert raising of the head (top line) 

 as the Met. 120 was started and its lowering as the time for 

 the food approached, the absence of body movement, the 



TABLE 20 



Dog 493 <$ 



Conditioned salivary reflex 



Conditioned motor reflex 



slight respiratory change and the ready flow of the condi- 

 tioned saliva. Figure 6 (pi. 110) gives a representative record 

 of the effect of the operation. Notice the absence of the 

 alert head movement during the conditioned stimulation, and 

 the absence of body movement, respiratory change, and flow 

 of conditioned saliva. Note especially that all these com- 

 ponents do appear when the food itself is presented. As 

 soon as the dog sees the food the head is lowered into the 

 pan and the animal begins to eat; while eating, the dog- 

 shifts the weight of the body from one foot to another, the 

 breathing is irregular, and the saliva flows freely. 



