Abstract
In the intact cat desynchronised sleep induces arterial hypotension and mesenteric vasodilatation, whereas in limb muscles vasoconstriction occurs because of the concurrent action of a spinal vasoconstriction reflex. After sino-aortic denervation arterial hypotension is exaggerated and mesenteric vasodilatation is greater, while the muscular bed of the limbs also becomes vaso-dilated rather than constricted. It is concluded that during desynchronised sleep the sino-aortic afferents act to check a central influence inhibiting vasoconstrictor tone both in the viscera and muscles: thus an excessive fall in blood pressure is prevented by avoiding a too large visceral vasodilatation and by unmasking the vasoconstrictor action of the spinal reflex in the limbs.
Original language | English |
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Pages (from-to) | 523-528 |
Number of pages | 6 |
Journal | Cardiovascular Research |
Volume | 12 |
Issue number | 9 |
Publication status | Published - 1978 |
ASJC Scopus subject areas
- Cardiology and Cardiovascular Medicine