NEITHER DORSAL ROOT NOR BARORECEPTOR AFFERENTS ARE NECESSARY FOR ELICITING THE RENAL RESPONSES TO ACUTE INTRA-VASCULAR VOLUME EXPANSION IN THE PRIMATE MACACA-FASCICULARIS

The authors determined the contribution of the dorsal roots, vagi, and sino-aortic nerves to the renal responses to acute isotonic, isooncotic intravascular volume expansion in the nonhuman primate, Macaca fascicularis. Expansion of the estimated blood volume by 15% produced a significant natriuresis and diuresis. There was no significant difference between the time to peak response for either. Neither dorsal rhizotomy (C6-T7) nor vagotomy and sino-aortic denervation had a significant effect on these responses. The authors conclude that these pathways are not necessary for eliciting the renal responses to hypervolemia in the nonhuman primate.