title: Modeling muscle's nonlinear viscoelastic dynamics.
abstract: Muscle's contractile properties are complicated by its viscoelastic properties. Failure of early viscoelastic muscle models led to Hill's force-velocity relation embodied as the contractile element. Adopting a particular force-velocity relation to describe muscle is neither easy, nor unique [1]. Time-varying elastance based models of the left ventricle have been popular since the idea was presented in 1969 [2]. This paper investigates adoption of the time-varying elastance concept to describe the viscoelastic properties of muscle. It will be shown that a time-varying elastance must be extended to a time, length, and velocity dependent elastance. Results show how a generalized force generator description of muscle [3] may be used to realistically model muscle's viscoelasticity.
authors.forename: Joseph L
authors.initials: JL
authors.lastname: Palladino
mesh_terms: D000818:Animals; D002415:Cats; D004548:Elasticity; D008954:Models, Biological; D009119:Muscle Contraction / Q000502:physiology*; D017711:Nonlinear Dynamics; D010210:Papillary Muscles / Q000502:physiology*; D011817:Rabbits; D014783:Viscosity