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Author : Ronald Eugene Hileman
Release : 1972
Genre : Calcium in the body
Kind : eBook
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Book Synopsis Systems Study of Muscle Activation and Contraction Based on Calcium Dynamics by : Ronald Eugene Hileman
Download or read book Systems Study of Muscle Activation and Contraction Based on Calcium Dynamics written by Ronald Eugene Hileman. This book was released on 1972. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Johann C. Rüegg
Release : 2012-12-06
Genre : Medical
Kind : eBook
Book Rating : 81X/5 ( reviews)
Book Synopsis Calcium in Muscle Activation by : Johann C. Rüegg
Download or read book Calcium in Muscle Activation written by Johann C. Rüegg. This book was released on 2012-12-06. Available in PDF, EPUB and Kindle. Book excerpt: This book offers a comparative and interdisciplinary approach to excitation-contraction-coupling in smooth and striated mus cles, including the myocardium. It is an account of the path ways and mechanisms by which cellular calcium is handled and activates the contractile proteins. It also describes how these mechanisms are adapted in various kinds of muscle to meet specific functional requirements, such as speed or economy. This monograph then presents facts, ideas and theories and the evidence on which they are based, and ifit stimulates others and furthers research, it will have served its purpose. All of the chapters are self-contained and may be read in any order, but readers unfamiliar with muscle are recommended to start with the introductory chapter on excitation and contraction. During all the years of writing this book, I received enormous help from Isolde Berger who corrected, edited and transformed my innumerable notes and drafts into a readable manuscript; she also compiled the list of references and the Subject Index. I owe a great debt of gratitude to her and also to Claudia Zeugner, who prepared the figures with expertise and care. Then I would like to thank the Deutsche F orschungs gemeinschaft and the Fritz-Thyssen-Stiftung for supporting the work of my Department which has been reported in this monograph. A great many people contributed with helpful discussions.
Author : Johann Caspar Rüegg
Release : 1988
Genre : Medical
Kind : eBook
Book Rating : /5 ( reviews)
Book Synopsis Calcium in Muscle Activation by : Johann Caspar Rüegg
Download or read book Calcium in Muscle Activation written by Johann Caspar Rüegg. This book was released on 1988. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Yantao Zhang
Release : 2015
Genre :
Kind : eBook
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Book Synopsis A Coupled Electro-Chemical-Mechanical Multi-Scale Computational Framework for Simulation of Skeletal Muscles by : Yantao Zhang
Download or read book A Coupled Electro-Chemical-Mechanical Multi-Scale Computational Framework for Simulation of Skeletal Muscles written by Yantao Zhang. This book was released on 2015. Available in PDF, EPUB and Kindle. Book excerpt: This work focuses on electro-chemical-mechanical multi-scale simulation of the excitation-contraction of skeletal muscle, including electro-chemical excitation process in the neural system which activates the contraction of muscle fibers, the combined effects of active fiber contraction and passive extracellular matrix (ECM) mechanical deformation, and their resulting force generation in the muscle components. In the neural systems, the Fitzhugh-Nagumo (FHN) equation is solved to simulate the propagation of neural signals (action potential) in neural trees and muscle fibers using multi-dimensional FHN discretizations. The calculated neural signal is consequently used as the input for the calcium dynamics model, which describes the chemical processes in the muscle fibers. Based on the calculated calcium concentration, the activation distribution in the muscle tissue is then obtained, which determines the active force muscle fiber can generate voluntarily. To study the mechanics associated with the composition of muscle fibers and ECM, the microstructure of skeletal muscle is reconstructed from images, from which the homogenized material property in the continuum level is calculated. By varying the microstructure model, their morphological effect on the muscle performance is studied and compared with experimental observation. Computationally, the physiological models in excitation dynamics are solved by finite difference methods, and their accuracy, efficiency and stability conditions are studied respectively. For the cellular and component scale models, the 3-dimensional reproducing kernel particle method (RKPM) together with stabilized conforming nodal integration are employed. The simulation models are constructed based on medical images, where the pixel points are directly used as meshfree nodes. This computational model has been used to investigate the source of reduced force generation associated with ageing or diseases within muscles due to the malfunctioning in the subscale units. Through the proposed computational models, this research demonstrates how the stiffened connective tissue reduces force generation and how the frequency of neural stimulation affects force generation in the skeletal muscle.
Author : Donald Bers
Release : 2012-12-06
Genre : Medical
Kind : eBook
Book Rating : 58X/5 ( reviews)
Book Synopsis Excitation-Contraction Coupling and Cardiac Contractile Force by : Donald Bers
Download or read book Excitation-Contraction Coupling and Cardiac Contractile Force written by Donald Bers. This book was released on 2012-12-06. Available in PDF, EPUB and Kindle. Book excerpt: How is the heartbeat generated? What controls the strength of contraction of heart muscle? What are the links between cardiac structure and function? How does our understanding of skeletal and smooth muscle and non-muscle cells influence our thinking about force development in the heart? Are there important species differences in how contraction is regulated in the heart? How do the new molecular data fit together in understanding the heart beat? What goes wrong in ischemia, hypertrophy, and heart failure? This book paints a modern `portrait' of how the heart works and in this picture the author shows a close-up of the structural, biochemical, and physiological links between excitation and contraction. The author takes the reader through a series of important, interrelated topics with great clarity and continuity and also includes many useful illustrations and tables. The book starts by considering the cellular structures involved in excitation-contraction coupling and then described the characteristics of the myofilaments as the end effector of excitation-contraction coupling. A general scheme of calcium regulation is described and the possible sources and sinks of calcium are discussed in simple, but quantitative terms. The cardiac action potential and its many underlying currents are reviewed. Then the characteristics of some key calcium transport systems (calcium channels, sodium/calcium exchange and SR calcium uptake and release) are discussed in detail. This is then built into a more integrated picture of calcium regulation in succeeding chapters by detailed discussions of excitation-calcium coupling mechanisms (in skeletal, cardiac, and smooth muscle), the interplay between calcium regulatory processes, and finally mechanisms of cardiac inotropy, calcium overload, and dysfunction (e.g., ischemia, hypertrophy, and heart failure). Excitation-Contraction Coupling and Cardiac Contractile Force – Second Edition is an invaluable source of information for anyone who is interested in how the heart beat is controlled and especially suited for students of the cardiovascular system at all levels from medical/graduate students through senior investigators in related fields.
