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Fig. 1. A recording from an anaesthetised rattlesnake (Crotalus durissus,
754 g) of systemic arterial blood pressure (Psys) as well
as blood flows in the pulmonary artery
(
PA) and the left aortic
arch (
LAO) during a period
of peripheral electrical stimulation of the left or right cervical vagus. The
periods of electrical stimulation are shown by the right bars.