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
A minimum energy cost hypothesis for human arm trajectories.
TL;DR: This paper presents and tests the hypothesis that trajectories are chosen to minimize metabolic energy costs, and calculated energy minimizing trajectories for a model with biarticular elbow muscles agree well with observed trajectoryories for fast movements.
Proceedings ArticleDOI
Experimental and simulation studies of hard contact in force reflecting teleoperation
Blake Hannaford,R.J. Anderson +1 more
TL;DR: It is shown that human operator properties, which vary as a result of different types of grasp of the handle, affect the stability of the system in the hard-contact task, and human operator biomechanics must be taken into account to guarantee stable and ergonomic performance of advanced teleoperators.
Journal ArticleDOI
Identification of intrinsic and reflexive components of human arm dynamics during postural control.
TL;DR: It is concluded that this new methodology to quantify reflexive feedback gains from the mechanical behavior of the human arm during posture maintenance can offer interesting insights into the ability of the central nervous system to modulate reflexive Feedback gains.
Journal ArticleDOI
Sensitivity of a Hill-based muscle model to perturbations in model parameters
Carol Y. Scovil,Janet L. Ronsky +1 more
TL;DR: Model evaluations were found to be very sensitive to parameters defining the series elastic component (tendon), force-length curve of the contractile element and maximum isometric force, and the sensitivities of the running and walking simulations were reduced compared to the sensitivity of the muscle model alone.
Journal ArticleDOI
The control of shoulder muscles during goal directed movements, an inverse dynamic analysis.
TL;DR: Fast goal directed arm movements in the sagittal plane were analyzed with a three-dimensional shoulder model with 95 muscle elements and most model results were similar to the EMG but some differences between model results and EMG were found in muscles where theEMG activity was subject dependent.
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.
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Journal ArticleDOI
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Journal ArticleDOI
Elasticity of soft tissues in simple elongation
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