BLOOD PRESSURE IN RATS SUBJECTED TO AUDIOGENIC STIMULATION

Abstract

Blood pressures were taken in 18 exptl. rats subjected to daily audiogenic stimulation and 21 controls at 400-900 days of age; and on 12 controls and 12 exptls. between 130-200 days of age. No difference in incidence of hypertension was found in the younger group, but a significant difference was found in the older group[long dash]there being 61% hypertensives among the exptls. and 19% among the controls. Of the 11 hypertensive grays in older exptl. group, 9 were excellent reactors to audiogenic stimulation. Of the 7 normotensives in this group. none were '' good reactors. This is believed to be objective evidence for neurogenic influences in the etiology of hypertension.