Abstract
The purpose of this work was to investigate contribution of a visual feedback system to limb stiffness. It is difficult to differentiate the visual component from others out of measured data obtained by applying a force perturbation, which is required to estimate stiffness,. In this study, we proposed an experimental procedure consisted of a pair of tasks to investigate the visual feedback component, and showed it as end-point stiffness ellipses at several timings of a movement. In addition, we carried out a numerical simulation of the movement with the perturbation in according with a framework of optimal feedback control model. As results, long axes of the stiffness ellipses of the visual component were modulated to the movement directions and the simulation showed that a positional feedback gain was exponentially increased toward a movement end. Consequently, the visual feedback system is supposed to regulate compliance of a movement direction.
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Ueyama, Y., Miyashita, E. (2012). Estimation of Visual Feedback Contribution to Limb Stiffness in Visuomotor Control. In: Zanzotto, F.M., Tsumoto, S., Taatgen, N., Yao, Y. (eds) Brain Informatics. BI 2012. Lecture Notes in Computer Science(), vol 7670. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-35139-6_7
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DOI: https://doi.org/10.1007/978-3-642-35139-6_7
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