Treating drop-foot in hemiplegics: the role of matrix electrode

Christine Azevedo Coste 1 Goran Bijelic 2 Laszlo Schwirtlich 2 D. Popovic 2, 3
1 DEMAR - Artificial movement and gait restoration
LIRMM - Laboratoire d'Informatique de Robotique et de Microélectronique de Montpellier, CRISAM - Inria Sophia Antipolis - Méditerranée
Abstract : We present advantages of the “intelligent matrix electrode” for providing selective correction of drop-foot in hemiplegic individuals. The matrix electrode which integrates stimulating and sensing parts could allow the emulation of the appropriate electrode shape and size; thereby, provision of selective stimulation that leads to functional movement and online adaptation of the electrode during the application. The need for selective stimulation follows recent findings about therapeutic effects of electrical stimulation in neurorehabilita-tion. The matrix electrode comprises small fields that can be made conductive and a controller that allows computerized selection of the fields being conductive. Here we present results from a study in nine hemiplegics. The matrix electrode was positioned over the peroneal nerve and primary dorsiflexor muscles and we estimated the movement of the foot by measur-ing the ankle joint angle. We found that the branched tree type shape and size of the electrode vary substantially when stimulating over the dorsiflexor muscles individuals in the study. We confirmed very high sensitivity to the position of small electrode when stimulating over the nerve. This indicates that the use of “intelligent matrix electrode” is favorable compared with conventional electrodes since it can adapt to individual and secure selective stimulation.
Type de document :
Communication dans un congrès
MEDICON'07: 11th Mediterranean Conference on Medical and Biological Engineering and Computing, Jun 2007, Lubljana, Slovenia, pp.4, 2007
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https://hal-lirmm.ccsd.cnrs.fr/lirmm-00165447
Contributeur : Christine Azevedo Coste <>
Soumis le : jeudi 26 juillet 2007 - 11:11:04
Dernière modification le : jeudi 24 mai 2018 - 15:59:23

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  • HAL Id : lirmm-00165447, version 1

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Christine Azevedo Coste, Goran Bijelic, Laszlo Schwirtlich, D. Popovic. Treating drop-foot in hemiplegics: the role of matrix electrode. MEDICON'07: 11th Mediterranean Conference on Medical and Biological Engineering and Computing, Jun 2007, Lubljana, Slovenia, pp.4, 2007. 〈lirmm-00165447〉

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