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    A Nonlinear Model of Passive Muscle Viscosity

    Source: Journal of Biomechanical Engineering:;2011:;volume( 133 ):;issue: 009::page 91007
    Author:
    G. A. Meyer
    ,
    R. L. Lieber
    ,
    A. D. McCulloch
    DOI: 10.1115/1.4004993
    Publisher: The American Society of Mechanical Engineers (ASME)
    Abstract: The material properties of passive skeletal muscle are critical to proper function and are frequently a target for therapeutic and interventional strategies. Investigations into the passive viscoelasticity of muscle have primarily focused on characterizing the elastic behavior, largely neglecting the viscous component. However, viscosity is a sizeable contributor to muscle stress and extensibility during passive stretch and thus there is a need for characterization of the viscous as well as the elastic components of muscle viscoelasticity. Single mouse muscle fibers were subjected to incremental stress relaxation tests to characterize the dependence of passive muscle stress on time, strain and strain rate. A model was then developed to describe fiber viscoelasticity incorporating the observed nonlinearities. The results of this model were compared with two commonly used linear viscoelastic models in their ability to represent fiber stress relaxation and strain rate sensitivity. The viscous component of mouse muscle fiber stress was not linear as is typically assumed, but rather a more complex function of time, strain and strain rate. The model developed here, which incorporates these nonlinearities, was better able to represent the stress relaxation behavior of fibers under the conditions tested than commonly used models with linear viscosity. It presents a new tool to investigate the changes in muscle viscous stresses with age, injury and disuse.
    keyword(s): Fibers , Viscosity , Relaxation (Physics) , Stress AND Muscle ,
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      A Nonlinear Model of Passive Muscle Viscosity

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    contributor authorG. A. Meyer
    contributor authorR. L. Lieber
    contributor authorA. D. McCulloch
    date accessioned2017-05-09T00:42:22Z
    date available2017-05-09T00:42:22Z
    date copyrightSeptember, 2011
    date issued2011
    identifier issn0148-0731
    identifier otherJBENDY-27218#091007_1.pdf
    identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/145383
    description abstractThe material properties of passive skeletal muscle are critical to proper function and are frequently a target for therapeutic and interventional strategies. Investigations into the passive viscoelasticity of muscle have primarily focused on characterizing the elastic behavior, largely neglecting the viscous component. However, viscosity is a sizeable contributor to muscle stress and extensibility during passive stretch and thus there is a need for characterization of the viscous as well as the elastic components of muscle viscoelasticity. Single mouse muscle fibers were subjected to incremental stress relaxation tests to characterize the dependence of passive muscle stress on time, strain and strain rate. A model was then developed to describe fiber viscoelasticity incorporating the observed nonlinearities. The results of this model were compared with two commonly used linear viscoelastic models in their ability to represent fiber stress relaxation and strain rate sensitivity. The viscous component of mouse muscle fiber stress was not linear as is typically assumed, but rather a more complex function of time, strain and strain rate. The model developed here, which incorporates these nonlinearities, was better able to represent the stress relaxation behavior of fibers under the conditions tested than commonly used models with linear viscosity. It presents a new tool to investigate the changes in muscle viscous stresses with age, injury and disuse.
    publisherThe American Society of Mechanical Engineers (ASME)
    titleA Nonlinear Model of Passive Muscle Viscosity
    typeJournal Paper
    journal volume133
    journal issue9
    journal titleJournal of Biomechanical Engineering
    identifier doi10.1115/1.4004993
    journal fristpage91007
    identifier eissn1528-8951
    keywordsFibers
    keywordsViscosity
    keywordsRelaxation (Physics)
    keywordsStress AND Muscle
    treeJournal of Biomechanical Engineering:;2011:;volume( 133 ):;issue: 009
    contenttypeFulltext
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