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
Learning combined feedback and feedforward control of a musculoskeletal system
TL;DR: Analysis of the controller shows that significant differences in controller characteristics are found if the loop delays are neglected, and if only limited feedback information is available to the controller the system learns to co-contract the antagonistic muscle pair.
Journal ArticleDOI
Real-Time Simulation of Three-Dimensional Shoulder Girdle and Arm Dynamics
TL;DR: Evaluated real-time, dynamic model of the arm and shoulder girdle simulates the moment-generating behavior of a real human arm, enabling experiments where the user controls the virtual arm and receives visual feedback in real time.
Journal ArticleDOI
Megatherium, the stabber
R A Fariña,R E Blanco +1 more
TL;DR: This paper tests the hypothesis that Megatherium americanum had morphological features that are better explained by its having had carnivorous habits rather than by solely herbivorous ones, and suggests the possibility that the animal could have manipulated large prey and cached large food pieces in a safer place.
The Twente lower extremity model : consistent dynamic simulation of the human locomotor apparatus
Klein Horsman,Martijn Dirk +1 more
TL;DR: Inverse and forward model simulations will provide insight in how respectively movement and muscle activations are affected by surgery as well as evaluation of if-then scenarios with respect to treatment methods.
Journal ArticleDOI
Identification of passive knee joint and shank dynamics in paraplegics using quadriceps stimulation
TL;DR: In this paper, the dynamics of the knee-joint-freely-swinging-lower-leg system of three sitting paraplegic patients were identified using a parameterized analytical model.
References
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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
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Journal ArticleDOI
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Journal ArticleDOI
Elasticity of soft tissues in simple elongation
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