Locus of Emetic Action Following Irradiation.

Abstract
The incidence of vomiting among 33 dogs receiving from 300 to 800 r is reported. All 12 dogs exposed to 800 r vomited within 2 hrs. after completion of irradiation. The 50% vomiting dose was 540 r. No dog sub-jected to bilateral destruction of the emetic chemoreceptor zone vomited after 800 r exposure. The significance of these findings is discussed.