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An Activation Model of Motor Response and H-Reflex under FES

Sanne Floor Campfens 1, 2 Maria Papaiordanidou 2, 3 Alain Varray 3 David Guiraud 2, * Mitsuhiro Hayashibe 2
* Corresponding author
2 DEMAR - Artificial movement and gait restoration
LIRMM - Laboratoire d'Informatique de Robotique et de Microélectronique de Montpellier, CRISAM - Inria Sophia Antipolis - Méditerranée
Abstract : In this work a model is presented that can improve the estimation of muscle activation under electrical stimula-tion. The model includes not only the motor recruitment but also the H-reflex recruitment, which is, at the lower stimulation levels, responsible for a larger exerted force than expected based on only motor recruitment. In the model it is assumed that recruitment curves are sigmoid shapes, that there is no difference between motor units and no specific recruitment order. The model is fitted to the measured recruitment curves of two healthy subjects and shows good fits, with R2 values above or around 0.95. The next goal is to use this improved activation model in combination with a force estimating muscle model in order to enhance the accuracy of the force estimation.
Keywords : H-Reflex FES
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Conference papers
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https://hal-lirmm.ccsd.cnrs.fr/lirmm-00344724
Contributor : David Guiraud <>
Submitted on : Friday, December 5, 2008 - 3:21:38 PM
Last modification on : Thursday, February 25, 2021 - 7:40:04 PM

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  • HAL Id : lirmm-00344724, version 1

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Sanne Floor Campfens, Maria Papaiordanidou, Alain Varray, David Guiraud, Mitsuhiro Hayashibe. An Activation Model of Motor Response and H-Reflex under FES. IFESS: International Functional Electrical Stimulation Society, Sep 2008, Freiburg, Germany. ⟨lirmm-00344724⟩

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