An implantable neuroprosthesis for standing and walking in paraplegia: five-year patient follow-up

David Guiraud 1 Thomas Stieglitz Klaus Peter Koch Jean Louis Divoux Pierre Rabischong
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 the results of a five-year patient follow-up after implantation of an original neuroprosthesis. The system is able to stimulate both epimysial and neural electrodes in such a way that the complete flexor-extensor chain of the lower limb can be activated without using of the withdrawal reflex. We demonstrate that standing and assisted walking are possible, and the results have remained stable for five years. Nevertheless, some problems were noted, particularly regarding the muscle response on the epimysial channels. Analysis of the electrical behaviour and thresholds indicated that the surgical phase is crucial because of the sensitivity of the functional responses to electrode placement. Neural stimulation proved to be more efficient and more stable over time. This mode requires less energy and provides more selective stimulation. This FES system can be improved to enable balanced standing and less fatiguing gait, but this will require feedback on event detection to trigger transitions between stimulation sequences, as well as feedback to the patient about the state of his lower limbs.
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Article dans une revue
Journal of Neural Engineering, IOP Publishing, 2006, pp.268-275
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https://hal.inria.fr/inria-00127870
Contributeur : David Guiraud <>
Soumis le : mardi 30 janvier 2007 - 09:43:08
Dernière modification le : samedi 27 janvier 2018 - 01:31:50

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  • HAL Id : inria-00127870, version 1

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David Guiraud, Thomas Stieglitz, Klaus Peter Koch, Jean Louis Divoux, Pierre Rabischong. An implantable neuroprosthesis for standing and walking in paraplegia: five-year patient follow-up. Journal of Neural Engineering, IOP Publishing, 2006, pp.268-275. 〈inria-00127870〉

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