Journal article
Circulatory mechanoreceptors in the pond turtle Pseudemys scripta
The American journal of physiology, Vol.242(3), pp.R216-219
03/1982
DOI: 10.1152/ajpregu.1982.242.3.R216
PMID: 7065215
Abstract
This study was undertaken to characterize cardiovascular receptors in the turtle, Pseudemys scripta, with particular attention being given to neural activity changes associated with alterations in blood pressure. Vagal afferent nerve traffic, synchronous with heart contractions, was recorded in anesthetized artificially ventilated turtles. Action potentials, from receptors that fired regularly during each heart cycle, occurred during ventricular systole. Mechanical probing and vascular occlusion indicated that these receptors were located in the proximal common pulmonary artery including the bulbus cordis region. Bolus injections of saline into the ventricle or the common pulmonary artery caused immediate but transient increases in cardiac synchronous traffic. Prolonged elevation of arterial and ventricular blood pressure, by either saline injection or arterial occlusion, caused increases in receptor discharge of the same duration as the pressure increases. Although these receptors could participate in the regulation of the systemic and the pulmonary circulation, the physiological role for them is presently unknown.
Details
- Title: Subtitle
- Circulatory mechanoreceptors in the pond turtle Pseudemys scripta
- Creators
- F M FaraciH W ShirerJ A OrrJ W Trank
- Resource Type
- Journal article
- Publication Details
- The American journal of physiology, Vol.242(3), pp.R216-219
- Publisher
- United States
- DOI
- 10.1152/ajpregu.1982.242.3.R216
- PMID
- 7065215
- ISSN
- 0002-9513
- eISSN
- 2163-5773
- Grant note
- 4893 / PHS HHS
- Language
- English
- Date published
- 03/1982
- Academic Unit
- Cardiovascular Medicine; Neuroscience and Pharmacology; Internal Medicine
- Record Identifier
- 9984040553702771
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