AJP - Regu Fuel your research with LabChart
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
QUICK SEARCH:   [advanced]


     

Am J Physiol Regul Integr Comp Physiol 250: R30-R35, 1986;
0363-6119/86 $5.00
This Article
Right arrow Full Text (PDF)
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Citing Articles
Right arrow Citing Articles via HighWire
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Thornton, R. M.
Right arrow Articles by Proppe, D. W.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Thornton, R. M.
Right arrow Articles by Proppe, D. W.

AJP - Regulatory, Integrative and Comparative Physiology, Vol 250, Issue 1 30-R35, Copyright © 1986 by American Physiological Society

ARTICLES

Attenuation of hindlimb vasodilation in heat-stressed baboons during dehydration

R. M. Thornton and D. W. Proppe

The influence of dehydration on hindlimb vasodilation during environmental heating (EH) was examined in eight unanesthetized chronically instrumented baboons. Mean iliac blood flow (MIBF), arterial blood pressure, and core temperature (Tc) were measured during EH of baboons in euhydrated and dehydrated states. EH consisted of acute exposure to high ambient temperatures (39-44 degrees C) until Tc reached 39.5 degrees C. Dehydration was produced by 68-72 h of fluid deprivation, which caused increases in plasma osmolality [291 +/- 1 (SE) to 338 +/- 6 mosmol/kg H2O] and sodium concentration (143 +/- 2 to 163 +/- 3 meq/l) and a 16% fall in plasma volume. The primary influence of dehydration was attenuation of the progressive rise in MIBF and iliac conductance (IC) during EH. Absolute MIBF and IC levels at Tc = 39.5 degrees C during EH were 44 and 52%, respectively, lower in the dehydrated state. Also, the MIBF-Tc and IC-Tc linear regression coefficients during EH were lower by 33 and 43%, respectively, in the dehydrated state. Since limb skeletal muscle blood flow does not increase during EH, we conclude that dehydration attenuates the heat stress-induced rise in skin blood flow in baboons, an influence that is similar to what occurs in humans.


This article has been cited by other articles:


Home page
 Am. J. Physiol. Regul. Integr. Comp. Physiol.Home page
M. Konishi, K. Kanosue, M. Kano, A. Kobayashi, and K. Nagashima
The median preoptic nucleus is involved in the facilitation of heat-escape/cold-seeking behavior during systemic salt loading in rats
Am J Physiol Regulatory Integrative Comp Physiol, January 1, 2007; 292(1): R150 - R159.
[Abstract] [Full Text] [PDF]


HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
Visit Other APS Journals Online