Document Detail


Influence of central command and ergoreceptors on the splanchnic circulation during isometric exercise.
MedLine Citation:
PMID:  8565979     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The splanchnic circulation can make a major contribution to blood flow changes. However, the role of the splanchnic circulation in the reflex adjustments to the blood pressure increased during isometric exercise is not well documented. The central command and the muscle chemoreflex are the two major mechanisms involved in the blood pressure response to isometric exercise. This study aimed to examine the behaviour of the superior mesenteric artery during isometric handgrip (IHG) at 30% maximal voluntary contraction (MVC). The pulsatility index (PI) of the blood velocity waveform of the superior mesenteric artery was taken as the study parameter. A total of ten healthy subjects [mean age, 21.1 (SEM 0.3) years] performed an IHG at 30% MVC for 90 s. At 5 s prior to the end of the exercise, muscle circulation was arrested for 90 s to study the effect of the muscle chemoreflex (post exercise arterial occlusion, PEAO). The IHG at 30% MVC caused a decrease in superior mesenteric artery PI, from 4.84 (SEM 1.57) at control level to 3.90 (SEM 1.07) (P = 0.015). The PI further decreased to 3.17 (SEM 0.70) (P = 0.01) during PEAO. Our results indicated that ergoreceptors may be involved in the superior mesenteric artery vasodilatation during isometric exercise.
Authors:
D Duprez; D Voet; M De Buyzere; B Drieghe; B Vyncke; S Mareels; M Afschrift; D L Clement
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  European journal of applied physiology and occupational physiology     Volume:  71     ISSN:  0301-5548     ISO Abbreviation:  Eur J Appl Physiol Occup Physiol     Publication Date:  1995  
Date Detail:
Created Date:  1996-03-01     Completed Date:  1996-03-01     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  0410266     Medline TA:  Eur J Appl Physiol Occup Physiol     Country:  GERMANY    
Other Details:
Languages:  eng     Pagination:  459-63     Citation Subset:  IM; S    
Affiliation:
Department of Cardiology and Angiology, University Hospital, Gent, Belgium.
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MeSH Terms
Descriptor/Qualifier:
Adult
Blood Flow Velocity
Blood Pressure / physiology*
Exercise / physiology*
Female
Heart Rate / physiology
Humans
Male
Mesenteric Artery, Superior / physiology
Muscle Contraction / physiology
Muscle, Skeletal / physiology*
Pressoreceptors / physiology*
Pulsatile Flow
Splanchnic Circulation / physiology*
Vasodilation

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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