Journal ArticleDOI
Analysis of Fundamental Human Movement Patterns Through the Use of In-Depth Antagonistic Muscle Models
Jack M. Winters,Lawrence Stark +1 more
TLDR
A nonlinear eighth-order agonist-antagonist muscle model is identified, based on engineering analysis and design criteria, as the desired structure for the broad-range study of a variety of fundamental human joint movements as mentioned in this paper.Abstract:
A nonlinear eighth-order agonist-antagonist muscle model is identified, based on engineering analysis and design criteria, as the desired structure for the broad-range study of a variety of fundamental human joint movements. To complement this structure, systematic protocols, that combine material and geometrical information for each muscle, are developed to obtain the model parameter values needed for the various muscle constitutive equations. The parameters describing the four basic nonlinear relations are easy to visualize, representing the peak curve values and "shape" parameters. Elbow, knee, wrist, and ankle fiexion-extension and eye, wrist, and head rotation are simulated by this same model structure.read more
Citations
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Journal ArticleDOI
Simulated work loops predict maximal human cycling power
TL;DR: Simulated maximized work loops closely predict experimental joint power during maximal voluntary cycling, demonstrating that, like birds and fish, humans are capable of maximizing muscle power.
Journal ArticleDOI
A fuzzy-genetic model for estimating forces from electromyographical activity of antagonistic muscles due to planar lower arm movements: the effect of nonlinear muscle properties.
TL;DR: F fuzzy genetic implementation Hill-based muscle model (FGIHM) has proved to have lower sensitivity to input noise than the traditional Hill's muscle model and the FGIHM active force-length relationship has been compared to virtual muscle (VM) and Zajac muscle model.
Proceedings ArticleDOI
Conditioning vs. excitation time for estimating impedance parameters of the human arm
TL;DR: This paper aims to fill the gap by providing a method to estimate the impedance parameters of the human arm, while taking the numerical stability of the approach into account.
Journal ArticleDOI
Biomechanical Modeling of Muscle-Joint Systems
Jack M. Winters,Anita M. Bagley +1 more
TL;DR: The goal is to develop the most simple model that adequately demonstrate an approximately exponential relationship that represents the observed experimental behavior for a variety tween force and extension.
Journal ArticleDOI
The biomechanical effect of clavicular shortening on shoulder muscle function, a simulation study.
TL;DR: Clavicle shortening results in changes of maximal muscle moment changes around the shoulder girdle, expressed as maximal muscle moments for abduction and internal rotation, in a musculoskeletal computer model.
References
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Journal ArticleDOI
The heat of shortening and the dynamic constants of muscle
TL;DR: In this article, a more accurate and rapid technique for muscle heat measurement was proposed, and some astonishingly simple and accurate relations have been found, which determine the effect of load on speed of shortening, allow the form of the isometric contraction to be predicted, and are the basis of the so-called "visco-elasticity" of skeletal muscle.
Journal ArticleDOI
Data on the distribution of fibre types in thirty-six human muscles: An autopsy study
TL;DR: In this paper, the mean fibre type proportions of each muscle were examined and the spatial distribution of the fibre types was examined in order to determine whether this was random or not, and the number of closed fibers observed in the actual samples was compared statistically with the number expected to occur in a hexagonal lattice model, assuming a random distribution.
Journal ArticleDOI
Dynamic properties of mammalian skeletal muscles.
TL;DR: The author examines the relationship between ATPase activity of myosin and intrinsic speed of shortening, and the effects of nerve cross-union on properties of myOSin.
Journal ArticleDOI
A physiologically based criterion of muscle force prediction in locomotion
TL;DR: The inversely-nonlinear relationship of muscle contraction force and the possible contraction duration is utilized in a method to mathematically predict individual muscle forces and shows substantial agreement with that activity pattern predicted when endurance is used as the optimization criterion.
Journal ArticleDOI
Elasticity of soft tissues in simple elongation
TL;DR: A theoretical framework is presented in which the elastic properties of soft tissues can be described and it is shown that the mathematical formulation works well also in reducing published data on the series element of the heart and striated muscles, and the skin.
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