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ISSN: 2165-7025

Journal of Novel Physiotherapies
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Research Article

Efferent Copy and Corollary Discharge Motor Control Behavior Associated with a Hopping Activity

Wangdo Kim1, António P Veloso1, Filipa João1, and Sean S Kohles2*
1Univ Tecn Lisboa, Fac Motricidade Humana, CIPER, LBMF, Estrada da Costa, P-1499-002 Lisbon, Portugal
2Regenerative Bioengineering Laboratory, Departments of Mechanical & Materials Engineering and Biology, Portland State University, Portland, Oregon, USA
Corresponding Author : Sean S. Kohles
Adjunct Professor
Departments of Mechanical & Materials Engineering and Biology
Portland State University
P.O. Box 751, Portland, OR, USA, 97207-0751
Tel: 503-516-7528
E-mail: [email protected]
Received May 31, 2013; Accepted July 20, 2013; Published July 23, 2013
Citation: Kim W, Veloso AP, João F, Kohles SS (2013) Efferent Copy and Corollary Discharge Motor Control Behavior Associated with a Hopping Activity. J Nov Physiother 3:167. doi:10.4172/2165-7025.1000167
Copyright: © 2013 Kim W, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

Abstract

Hoppers respond not only to stimuli from the ground surfaces but also to cues generated by their own behaviors. This leads to desensitization because although the afferent and reafferent signals have distinct causes, they are carried by the same sensory channels. From a behavioral viewpoint, it may be necessary to distinguish between signals from the two causes especially when monitoring changes in the external environment separate from those due to selfmovement. We were able to separate afferent sensory stimuli from self-generated, reafferent signals using an action oriented perception system and dynamic programming approach. This effort addressed the question of how the nerve system selects which particular degree of freedom (DOFs) to cancel reafferent input. We have proposed an internal one-DOF model characterizing the motor control system during hopping, allowing the generation of an estimated ground reaction signal to drive natural shock absorption of the leg.

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