Skeletal muscle vasodilation at the onset of exercise

Departments of Anesthesiology and Physiology, Medical College of Wisconsin and Veterans Affairs Medical Center, Milwaukee, Wisconsin 53295 The purpose of this study was to determine whether -adrenergic or muscarinic receptors are involved in skeletal muscle vasodilation at the onset of exercise. Mon...

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Veröffentlicht in:Journal of applied physiology (1985) 1998-11, Vol.85 (5), p.1649-1654
Hauptverfasser: Buckwalter, John B, Ruble, Stephen B, Mueller, Patrick J, Clifford, Philip S
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container_end_page 1654
container_issue 5
container_start_page 1649
container_title Journal of applied physiology (1985)
container_volume 85
creator Buckwalter, John B
Ruble, Stephen B
Mueller, Patrick J
Clifford, Philip S
description Departments of Anesthesiology and Physiology, Medical College of Wisconsin and Veterans Affairs Medical Center, Milwaukee, Wisconsin 53295 The purpose of this study was to determine whether -adrenergic or muscarinic receptors are involved in skeletal muscle vasodilation at the onset of exercise. Mongrel dogs ( n  = 7) were instrumented with flow probes on both external iliac arteries and a catheter in one femoral artery. Propranolol (1 mg), atropine (500 µg), both drugs, or saline was infused intra-arterially immediately before treadmill exercise at 3 miles/h, 0% grade. Immediate and rapid increases in iliac blood flow occurred with initiation of exercise under all conditions. Peak blood flows were not significantly different among conditions (682 ± 35, 646 ± 49, 637 ± 68, and 705 ± 50 ml/min, respectively). Although the doses of antagonists employed had no effect on heart rate or systemic blood pressure, they were adequate to abolish agonist-induced increases in iliac blood flow. Because neither propranolol nor atropine affected iliac blood flow, we conclude that activation of -adrenergic and muscarinic receptors is not essential for the rapid vasodilation in active skeletal muscle at the onset of exercise in dogs. blood flow; autonomic nervous system; muscarinic; -adrenergic; dogs
doi_str_mv 10.1152/jappl.1998.85.5.1649
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Because neither propranolol nor atropine affected iliac blood flow, we conclude that activation of -adrenergic and muscarinic receptors is not essential for the rapid vasodilation in active skeletal muscle at the onset of exercise in dogs. blood flow; autonomic nervous system; muscarinic; -adrenergic; dogs</description><identifier>ISSN: 8750-7587</identifier><identifier>EISSN: 1522-1601</identifier><identifier>DOI: 10.1152/jappl.1998.85.5.1649</identifier><identifier>PMID: 9804565</identifier><identifier>CODEN: JAPHEV</identifier><language>eng</language><publisher>Bethesda, MD: Am Physiological Soc</publisher><subject>Adrenergic beta-Antagonists - pharmacology ; Animals ; Atropine - pharmacology ; Biological and medical sciences ; Blood ; Blood Pressure - physiology ; Dogs ; Exercise ; Fundamental and applied biological sciences. Psychology ; Heart Rate - physiology ; Hindlimb - blood supply ; Muscarinic Agonists - pharmacology ; Muscle, Skeletal - blood supply ; Muscle, Skeletal - physiology ; Muscular system ; Physical Exertion - physiology ; Propranolol - pharmacology ; Regional Blood Flow - physiology ; Space life sciences ; Striated muscle. 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Psychology</subject><subject>Heart Rate - physiology</subject><subject>Hindlimb - blood supply</subject><subject>Muscarinic Agonists - pharmacology</subject><subject>Muscle, Skeletal - blood supply</subject><subject>Muscle, Skeletal - physiology</subject><subject>Muscular system</subject><subject>Physical Exertion - physiology</subject><subject>Propranolol - pharmacology</subject><subject>Regional Blood Flow - physiology</subject><subject>Space life sciences</subject><subject>Striated muscle. 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Psychology</topic><topic>Heart Rate - physiology</topic><topic>Hindlimb - blood supply</topic><topic>Muscarinic Agonists - pharmacology</topic><topic>Muscle, Skeletal - blood supply</topic><topic>Muscle, Skeletal - physiology</topic><topic>Muscular system</topic><topic>Physical Exertion - physiology</topic><topic>Propranolol - pharmacology</topic><topic>Regional Blood Flow - physiology</topic><topic>Space life sciences</topic><topic>Striated muscle. Tendons</topic><topic>Vasodilation - physiology</topic><topic>Vertebrates: osteoarticular system, musculoskeletal system</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Buckwalter, John B</creatorcontrib><creatorcontrib>Ruble, Stephen B</creatorcontrib><creatorcontrib>Mueller, Patrick J</creatorcontrib><creatorcontrib>Clifford, Philip S</creatorcontrib><collection>Pascal-Francis</collection><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>Calcium &amp; Calcified Tissue Abstracts</collection><collection>Chemoreception Abstracts</collection><collection>Neurosciences Abstracts</collection><collection>Physical Education Index</collection><collection>Toxicology Abstracts</collection><collection>Technology Research Database</collection><collection>Environmental Sciences and Pollution Management</collection><collection>Engineering Research Database</collection><collection>Biotechnology and BioEngineering Abstracts</collection><collection>MEDLINE - Academic</collection><jtitle>Journal of applied physiology (1985)</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Buckwalter, John B</au><au>Ruble, Stephen B</au><au>Mueller, Patrick J</au><au>Clifford, Philip S</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Skeletal muscle vasodilation at the onset of exercise</atitle><jtitle>Journal of applied physiology (1985)</jtitle><addtitle>J Appl Physiol (1985)</addtitle><date>1998-11-01</date><risdate>1998</risdate><volume>85</volume><issue>5</issue><spage>1649</spage><epage>1654</epage><pages>1649-1654</pages><issn>8750-7587</issn><eissn>1522-1601</eissn><coden>JAPHEV</coden><abstract>Departments of Anesthesiology and Physiology, Medical College of Wisconsin and Veterans Affairs Medical Center, Milwaukee, Wisconsin 53295 The purpose of this study was to determine whether -adrenergic or muscarinic receptors are involved in skeletal muscle vasodilation at the onset of exercise. Mongrel dogs ( n  = 7) were instrumented with flow probes on both external iliac arteries and a catheter in one femoral artery. Propranolol (1 mg), atropine (500 µg), both drugs, or saline was infused intra-arterially immediately before treadmill exercise at 3 miles/h, 0% grade. Immediate and rapid increases in iliac blood flow occurred with initiation of exercise under all conditions. Peak blood flows were not significantly different among conditions (682 ± 35, 646 ± 49, 637 ± 68, and 705 ± 50 ml/min, respectively). Although the doses of antagonists employed had no effect on heart rate or systemic blood pressure, they were adequate to abolish agonist-induced increases in iliac blood flow. Because neither propranolol nor atropine affected iliac blood flow, we conclude that activation of -adrenergic and muscarinic receptors is not essential for the rapid vasodilation in active skeletal muscle at the onset of exercise in dogs. blood flow; autonomic nervous system; muscarinic; -adrenergic; dogs</abstract><cop>Bethesda, MD</cop><pub>Am Physiological Soc</pub><pmid>9804565</pmid><doi>10.1152/jappl.1998.85.5.1649</doi><tpages>6</tpages></addata></record>
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source MEDLINE; American Physiological Society; EZB-FREE-00999 freely available EZB journals; Alma/SFX Local Collection
subjects Adrenergic beta-Antagonists - pharmacology
Animals
Atropine - pharmacology
Biological and medical sciences
Blood
Blood Pressure - physiology
Dogs
Exercise
Fundamental and applied biological sciences. Psychology
Heart Rate - physiology
Hindlimb - blood supply
Muscarinic Agonists - pharmacology
Muscle, Skeletal - blood supply
Muscle, Skeletal - physiology
Muscular system
Physical Exertion - physiology
Propranolol - pharmacology
Regional Blood Flow - physiology
Space life sciences
Striated muscle. Tendons
Vasodilation - physiology
Vertebrates: osteoarticular system, musculoskeletal system
title Skeletal muscle vasodilation at the onset of exercise
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