Skeletal Muscle Circulation

Skeletal Muscle Circulation
Title Skeletal Muscle Circulation PDF eBook
Author Ronald J. Korthuis
Publisher Morgan & Claypool Publishers
Pages 147
Release 2011
Genre Medical
ISBN 1615041834

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The aim of this treatise is to summarize the current understanding of the mechanisms for blood flow control to skeletal muscle under resting conditions, how perfusion is elevated (exercise hyperemia) to meet the increased demand for oxygen and other substrates during exercise, mechanisms underlying the beneficial effects of regular physical activity on cardiovascular health, the regulation of transcapillary fluid filtration and protein flux across the microvascular exchange vessels, and the role of changes in the skeletal muscle circulation in pathologic states. Skeletal muscle is unique among organs in that its blood flow can change over a remarkably large range. Compared to blood flow at rest, muscle blood flow can increase by more than 20-fold on average during intense exercise, while perfusion of certain individual white muscles or portions of those muscles can increase by as much as 80-fold. This is compared to maximal increases of 4- to 6-fold in the coronary circulation during exercise. These increases in muscle perfusion are required to meet the enormous demands for oxygen and nutrients by the active muscles. Because of its large mass and the fact that skeletal muscles receive 25% of the cardiac output at rest, sympathetically mediated vasoconstriction in vessels supplying this tissue allows central hemodynamic variables (e.g., blood pressure) to be spared during stresses such as hypovolemic shock. Sympathetic vasoconstriction in skeletal muscle in such pathologic conditions also effectively shunts blood flow away from muscles to tissues that are more sensitive to reductions in their blood supply that might otherwise occur. Again, because of its large mass and percentage of cardiac output directed to skeletal muscle, alterations in blood vessel structure and function with chronic disease (e.g., hypertension) contribute significantly to the pathology of such disorders. Alterations in skeletal muscle vascular resistance and/or in the exchange properties of this vascular bed also modify transcapillary fluid filtration and solute movement across the microvascular barrier to influence muscle function and contribute to disease pathology. Finally, it is clear that exercise training induces an adaptive transformation to a protected phenotype in the vasculature supplying skeletal muscle and other tissues to promote overall cardiovascular health. Table of Contents: Introduction / Anatomy of Skeletal Muscle and Its Vascular Supply / Regulation of Vascular Tone in Skeletal Muscle / Exercise Hyperemia and Regulation of Tissue Oxygenation During Muscular Activity / Microvascular Fluid and Solute Exchange in Skeletal Muscle / Skeletal Muscle Circulation in Aging and Disease States: Protective Effects of Exercise / References

Anatomy & Physiology

Anatomy & Physiology
Title Anatomy & Physiology PDF eBook
Author Lindsay Biga
Publisher
Pages
Release 2019-09-26
Genre
ISBN 9781955101158

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A version of the OpenStax text

Anatomy and Physiology

Anatomy and Physiology
Title Anatomy and Physiology PDF eBook
Author J. Gordon Betts
Publisher
Pages 0
Release 2013-04-25
Genre
ISBN 9781947172807

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Kinesiology - E-Book

Kinesiology - E-Book
Title Kinesiology - E-Book PDF eBook
Author Joseph E. Muscolino
Publisher Elsevier Health Sciences
Pages 705
Release 2010-10-15
Genre Medical
ISBN 0323291422

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See the body's bones, joints, and muscles in action! Highly visual and in full color, Kinesiology: The Skeletal System and Muscle Function makes it easy to understand kinesiology concepts and how they would be applied to the treatment of dysfunction. It contains over 1,200 illustrations, including a bone atlas that shows every bone in the human body and six chapters with detailed, illustrated coverage of joints. Written by noted educator and author Joseph E. Muscolino, this book clearly depicts how muscles function as movers, antagonists, and stabilizers. This edition expands its reach to athletic training with two new chapters on stretching and strengthening exercises. This title includes additional digital media when purchased in print format. For this digital book edition, media content may not be included Companion DVD includes over one hour of video demonstrating all the major joint actions of the human body, with a voiceover explanation of the names of the motions, the planes in which motion occurs, and the axes around which motion occurs. Unique! A focus on the needs of massage therapists and bodyworkers makes it easier to apply kinesiology concepts to the practice of massage therapy. Unique! A complete bone atlas includes over 100 full-color photographs showing every bone in the human body. 1,200 full-color illustrations help you understand concepts relating to the bones of the human body, joints of the human body, and muscle function parts. A logical, easy-to-reference format moves from basics (like parts of the body) to more difficult topics (such as microphysiology). Six chapters on joints cover structure, function, and terminology, with specific illustrations on each joint in the human body: joints of the axial body, joints of the upper extremity, and joints of the lower extremity. Student-friendly features in each chapter include an outline, learning objectives, overview, key terms with pronunciations, and word origins designating the Latin or Greek derivative. Clear, simple explanations make it easy to understand kinesiology concepts, including muscle contraction(s), coordination of muscles with movement, core stabilization, posture, exercise, reflexes, and how the nervous system controls and directs the muscular system. Expert author Joseph E. Muscolino, DC, offers years of experience in the study of muscles and muscle function, as well as bodywork and massage, and conveys that information in an understandable format.

The Skeleton and Muscles

The Skeleton and Muscles
Title The Skeleton and Muscles PDF eBook
Author Steve Parker
Publisher Heinemann-Raintree Library
Pages 54
Release 2004
Genre Juvenile Nonfiction
ISBN 9780739866221

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This book looks at the muscles, bones, and joints that make up the musculoskeletal system. We look at how this system supports and protects the human body and allows it to move around. We will also examine the composition and workings of bones, muscles, and tendons and consider the problems that can occur when the musculoskeletal system gets too much, or too little, activity.

Ontogenesis of the Skeleton and Intrinsic Muscles of the Human Hand and Foot

Ontogenesis of the Skeleton and Intrinsic Muscles of the Human Hand and Foot
Title Ontogenesis of the Skeleton and Intrinsic Muscles of the Human Hand and Foot PDF eBook
Author Radomir Cihak
Publisher Springer Science & Business Media
Pages 194
Release 2013-04-17
Genre Medical
ISBN 3662090813

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The aim of the present publication is to summarize the results of studies of ontogenesis of the skeleton and muscles of the human hand and foot. Our primary interest in studying the muscles arose from observations of variations, in which a new form of the anomalous muscle in the popliteal fossa had been described (Cihak, 1954; Hnevkovsky and Cihak, 1957) and in which changes of muscle forms in the congenitally malformed extremity had also been studied (Brlickova and Cihak, 1956). The desire to clarify muscle variations by means of the onto genesis led to a study of ontogenesis of single muscles. During observation of the embryonic pectoralis major special muscle bundles were primarily observed, which could be homologised with the sphincter colli muscle of lower Mammals. Further observation revealed that this muscle (concordantly with its phylo genetic development) gradually develops in the course of human ontogenesis from a small primordium to its maximal extent and becomes reduced thereafter and finally disappears, still during the embryonic period (Cihak, 1957). This study was decisive for the further development of our theme, since it demonstra tes, how consistently in the development of the locomotor apparatus the rule of recapitulation is asserted and how this can be employed in developmental studies of muscles.

Botulinum Neurotoxins

Botulinum Neurotoxins
Title Botulinum Neurotoxins PDF eBook
Author Andreas Rummel
Publisher Springer
Pages 0
Release 2015-01-29
Genre Medical
ISBN 9783642448898

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The extremely potent substance botulinum neurotoxin (BoNT) has attracted much interest in diverse fields. Originally identified as cause for the rare but deadly disease botulism, military and terrorist intended to misuse this sophisticated molecule as biological weapon. This caused its classification as select agent category A by the Centers for Diseases Control and Prevention and the listing in the Biological and Toxin Weapons Convention. Later, the civilian use of BoNT as long acting peripheral muscle relaxant has turned this molecule into an indispensable pharmaceutical world wide with annual revenues >$1.5 billion. Also basic scientists value the botulinum neurotoxin as molecular tool for dissecting mechanisms of exocytosis. This book will cover the most recent molecular details of botulinum neurotoxin, its mechanism of action as well as its detection and application.