62 



PHYSIOLOGY FOR DENTAL STUDENTS. 



Iii passing, it may be well to call attention to the practical 

 importance of these observations in connection with the feeding 

 of debilitated persons ; by frequent feeding with appetizing food 

 the nutritional condition is likely to improve much more rapidly 

 than by occasional stuffing with uncongenial mixtures, however 

 rich these may be in calories and nitrogen. 



The secretion is therefore well named the appetite juice, and. 

 it lasts sometimes for nearly two hours after sham feeding has 

 been discontinued. Yet this is only about one-half as long as the 

 time during which gastric juice is secreted when the food is ac- 



Fig. 6. Diagram of stomach showing miniature stomach (S) separated 

 from the main stomach (V) by a double layer of mucous membrane. A. A. is 

 the opening of the pouch on the abdominal wall. (Pawlow. ) 



tually permitted to enter the stomach. In order to investigate 

 the cause of the continued secretion, it was necessary to devise 

 some means by which the gastric juice could be collected, un- 

 mixed with food, while normal digestion was in progress. Hav- 

 ing no duct the only means by which this could be done was by 

 isolating a portion of the stomach as a pouch with an opening 

 exteriorly through which the secretions collecting in it could be 

 removed. An operation for making such a pouch, or "miniature 

 stomach," as it is called, without injuring any of the nerves of 



