Selection and control of limb posture for stability
Piscataway, NJ : IEEE Service Center
InEngineering in Medicine and Biology Society (EMBC), 2013 35th Annual International Conference of the IEEE, pp. 5626-5629
Article in monograph or in proceedings
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SW OZ DCC CO
Engineering in Medicine and Biology Society (EMBC), 2013 35th Annual International Conference of the IEEE
SubjectAction, intention, and motor control; DI-BCB_DCC_Theme 2: Perception, Action and Control
Impedance control can be used to stabilize the limb against both instability and unpredictable perturbations. Limb posture influences motor noise, energy usage and limb impedance as well as their interaction. Here we examine whether subjects use limb posture as part of a mechanism to regulate limb stability. Subjects performed stabilization tasks while attached to a two dimensional robotic manipulandum which generated a virtual environment. Subjects were instructed that they could perform the stabilization task anywhere in the workspace, while the chosen postures were tracked as subjects repeated the task. In order to investigate the mechanisms behind the chosen limb postures, simulations of the neuro-mechanical system were performed. The results indicate that posture selection is performed to provide energy efficiency in the presence of force variability.
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