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Psychosomatic Medicine, Vol 45, Issue 1 3-9, Copyright © 1983 by American Psychosomatic Society

ORIGINAL ARTICLES

The effects of maternal deprivation and of refeeding on the blood pressure of infant rats

MK Shear, SR Brunelli and MA Hofer

Blood pressure regulation was explored in infant rats 12-14 days of age during the 30-40% changes in cardiac rate that accompany nutrient (maternal) deprivation and refeeding at this age. Using specially modified tail cuff and intraarterial cannulation techniques, blood pressure was found to be maintained at stable levels (65-75 mm Hg) throughout these marked changes in pumping rate. The results suggest that adrenergic vasoconstrictor tone is controlled reciprocally with heart rate during a complex cardiovascular response to changes in nutrient levels at this early age. The possible role of such a mechanism in the development of "spontaneous" hypertension is discussed.




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Copyright © 1983 by the American Psychosomatic Society