Interplay of sino aortic reflexes and haemodynamic changes during natural sleep in the cat

G. Baccelli, R. Albertini, G. Mancia, A. Zanchetti

Research output: Contribution to journalArticlepeer-review

Abstract

When the sino-aortic afferents are intact, desynchronized sleep causes a small decrease in the blood pressure, a vasodilatation in the mesenteric and renal beds, and a vasoconstriction in the external iliac bed. After sino-aortic deafferentation desynchronized sleep causes a larger fall in the blood pressure, a greater vasodilatation in the mesenteric and renal beds, and a vasodilatation replaces the vasoconstriction in the external iliac bed. The sino-aortic reflexes play an active role in controlling circulation during desynchronized sleep by opposing the centrally induced reduction in adrenergic sympathetic tone. This effect of sino-aortic reflexes is similar on both visceral and muscular vessels. In addition, the muscular bed, but not the visceral one, is regulated by a spinal reflex vasoconstriction mechanism which is apparent only when the sino-aortic reflexes are intact.

Original languageEnglish
Pages (from-to)373-375
Number of pages3
JournalClinical Science and Molecular Medicine
Volume51
Issue numberSup. 3
Publication statusPublished - 1976

ASJC Scopus subject areas

  • Medicine(all)

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