... and water in the gills. Given this, we hypothesized that CRS should be more prevalent in situations of low oxygen supply and RSA should be abolished by vagotomy. To test this, we investigated the role of the vagus nerve in mediating cardiorespiratory responses to changing environmental oxygen conditions...

... fibers and the peripheral sympathetic vasomotor fibers are activated during dives even without exercise, and their activities are elevated at the lowest heart rates in a dive when vasoconstriction is maximal, (2) in diving animals, parasympathetic cardiac tone via the vagus nerve dominates over...

... with experimentally induced fluctuations in air sac pressure. Feedback information mediating this response is thought to be routed to the central nervous system via afferent fibers of the vagus nerve. Here, we tested the effects of unilateral vagotomy on the peripheral motor patterns of song production...

..., and that the extrinsic innervation is involved mainly in the regulation of gastrointestinal blood flow under normal conditions and in response to central coordination with other organs. * Author for correspondence ( [email protected] ) 20 5 2010 © 2010. 2010 vagus nerve splanchnic nerve...

... of Biology, University of Texas at Arlington, Arlington, TX 76019, USA. 17 7 1991 © 1991 by Company of Biologists 1991 Amia calva air-breathing fish chemoreceptors gills glossopharyngeal nerve vagus nerve hypoxia NaCN catecholamines ventilatory control. In sham...

... vagus nerve O 2 -sensitive chemoreceptors hypoxia NaCN The reflex responses to hypoxia in teleost fishes appear to be mediated by chemoreceptors that are sensitive to external (water) and internal (blood or tissue) oxygen levels. Hypoxic bradycardia results from stimulation of externally...