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Estimation of Visual Feedback Contribution to Limb Stiffness in Visuomotor Control

  • Conference paper

Part of the Lecture Notes in Computer Science book series (LNAI,volume 7670)

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.

Keywords

  • Visual Feedback
  • Feedback Gain
  • Force Perturbation
  • Visual Error
  • Perturbation Onset

These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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© 2012 Springer-Verlag Berlin Heidelberg

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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

  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-642-35138-9

  • Online ISBN: 978-3-642-35139-6

  • eBook Packages: Computer ScienceComputer Science (R0)