Abstract
Summary
Renal flow was recorded by an electromagnetic flow meter in anesthetized dogs to observe the behavior of sympathetic nerve induced vasoconstriction to the kidney. Mean arterial pressure was held nearly constant by a blood pressure clamping procedure to eliminate autoregulation which would obscure the neural effect on renal resistance. Without the blood pressure clamp, renal flow remained almost unchanged when arterial pressure rose markedly on carotid occlusion. With the blood pressure clamp, renal flow decreased significantly on carotid occlusion. Renal electroneurograms showed an increased activity during carotid occlusion. Thus, sympathetic vasoconstrictor nerves to the kidney are excited in the carotid occlusion pressor reflex. It is concluded that the renal circulation participates in this neural reflex, by undergoing vasoconstriction in the absence of renal autoregulation.
Get full access to this article
View all access options for this article.