Abstract
Vomiting is one of the most common symptoms observed in disease, but its significance has usually received little consideration on the part of physicians. Consequently, it is hoped that this discussion of the character of the phenomenon and the nervous mechanism involved, as illustrated by the emetic action of the digitalis bodies, will result in a wider appreciation of the meaning of vomiting in disease. Since our studies have modified our conception of the vomiting act, we shall discuss the subject briefly. Vomiting is a convulsive seizure in the higher animals and man. It is always of reflex origin, and it has a definite motor mechanism with afferent paths for nervous impulses from all the organs and probably from all parts of the body. Since vomiting is always of reflex origin, it is a sensitive indicator of many changes in different organs. It is not correct to classify vomiting as
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