Dynamic interactions between limb segments during planar arm movement
John M. Hollerbach,Tamar Flash +1 more
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TLDR
The significance of the individual interaction forces during reaching movements in a horizontal plane involving only the shoulder and elbow joints has been assessed and trajectory formation strategies which simplify the dynamics computation are presented.Abstract:
Movement of multiple segment limbs requires generation of appropriate joint torques which include terms arising from dynamic interactions among the moving segments as well as from such external forces as gravity. The interaction torques, arising from inertial, centripetal, and Coriolis forces, are not present for single joint movements. The significance of the individual interaction forces during reaching movements in a horizontal plane involving only the shoulder and elbow joints has been assessed for different movement paths and movement speeds. Trajectory formation strategies which simplify the dynamics computation are presented.read more
Citations
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The coordination of arm movements: an experimentally confirmed mathematical model.
Tamar Flash,Neville Hogan +1 more
TL;DR: A mathematical model is formulated which is shown to predict both the qualitative features and the quantitative details observed experimentally in planar, multijoint arm movements, and is successful only when formulated in terms of the motion of the hand in extracorporal space.
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Formation and control of optimal trajectory in human multijoint arm movement
TL;DR: In this article, the authors proposed a mathematical model which accounts for formation of hand trajectories by defining an objective function, a measure of performance for any possible movement: square of the rate of change of torque integrated over the entire movement.
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The organization of human postural movements: A formal basis and experimental synthesis
L. M. Nashner,Gin McCollum +1 more
TL;DR: It is shown that organization of postural movements into combinations of distinct strategies simplifies the interpretation of sensory inputs and provides a framework compatible with both mechanical and physiological information and amenable to experimental testing.
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Kinematic features of unrestrained vertical arm movements
TL;DR: Unrestrained human arm trajectories between point targets have been investigated using a three-dimensional tracking apparatus, the Selspot system, and movement regions were discovered in which the hand paths were curved.
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Optimal feedback control and the neural basis of volitional motor control
TL;DR: Optimal feedback control theory might provide the important link across these levels of the motor system and help to unravel how the primary motor cortex and other regions of the brain plan and control movement.
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