288 



PRACTICAL PHYSIOLOGY. 



[lx. 



the intestines and tap theni s^ve'-il times with the handle of a scalpel. The 

 heart ceases to beat lor a time, being arrested reflcxly. The afferent nerve 

 is the sympathetic from t\ie abdomen, and the efferent the vagus. The 



tappinff succeeds more promptly if the intestines are slightly inflamed by 

 exposure to the air. 



{b.) It suflaces to exert digital pressure over the abdomen to produce thia 

 reflex arrest of the heart. 



