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2 results on '"Jean-Louis Divoux"'

1. Epileptic seizure recordings of a non-human primate using carbon nanotube microelectrodes on implantable silicon shanks

Author

Vincent Agache, J. Dijon, J. F. Charmeux, F. Berger, N. Torres-Martinez, N. Bourquin, Jean-Louis Divoux, Brigitte Piallat, S. Chabardes, C. Pudda, Ariana Sherdil, F. Sauter-Starace, and Alim-Louis Benabid

Subjects
Microelectrode, Materials science, Non human primate, Silicon, chemistry, law, medicine, chemistry.chemical_element, Epileptic seizure, Carbon nanotube, medicine.symptom, Neuroscience, law.invention
Abstract

In order to assess the signal to noise ratio and spatial selectivity of nanostructured microelectrodes, our consortium built an original assembly of surface macroelectrodes and deep microelectrode arrays. Acute and chronic assessments were achieved based on rodent and non human primate model. Eventually, we used this device to monitor by association of the surface and deep microelectrodes nominal behavior of the animals and induced epileptic seizure.

Published
2011

2. Modelling of the human paralysed lower limb under FES

Author

H. El Makssoud, Bernard Brogliato, David Guiraud, Jean-Louis Divoux, Etienne Dombre, Philippe Fraisse, François Pierrot, Pierre Rabischong, Pierre-Brice Wieber, Philippe Poignet, Artificial movement and gait restoration (DEMAR), Inria Sophia Antipolis - Méditerranée (CRISAM), Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National de Recherche en Informatique et en Automatique (Inria)-Laboratoire d'Informatique de Robotique et de Microélectronique de Montpellier (LIRMM), Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM), Conception et commande de robots pour la manipulation (DEXTER), Laboratoire d'Informatique de Robotique et de Microélectronique de Montpellier (LIRMM), Modelling, Simulation, Control and Optimization of Non-Smooth Dynamical Systems (BIPOP), Inria Grenoble - Rhône-Alpes, Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National de Recherche en Informatique et en Automatique (Inria), Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM), MXM-Laboratoires de Techologies Médicales (MXM Labs), MXM-Laboratoires de Techologies Médicales, Laboratoire d'Anatomie [CHU Montpellier], Centre Hospitalier Régional Universitaire [Montpellier] (CHRU Montpellier), Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS)-Inria Sophia Antipolis - Méditerranée (CRISAM), Robotique médicale et mécanismes parallèles (DEXTER), Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS), Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS), and Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)-Inria Sophia Antipolis - Méditerranée (CRISAM)

Subjects
Engineering, business.industry, 0206 medical engineering, Open-loop controller, Control engineering, Robotics, Context (language use), 02 engineering and technology, Motion control, 020601 biomedical engineering, Lower limb, 03 medical and health sciences, Identification (information), 0302 clinical medicine, Control theory, [INFO.INFO-RB]Computer Science [cs]/Robotics [cs.RO], Functional electrical stimulation, Artificial intelligence, business, 030217 neurology & neurosurgery
Abstract

International audience; The new generation of implanted neuroprostheses allows muscles to be controlled with fine accuracy, high selectivity and the repeatability of the muscle's response can be achieved. Thus, the closed loop control of such systems becomes possible. The SUAW project succeeded in the implantation of an advanced neuroprosthetic device on two patients, but the movement generation remains open loop and is tuned empirically. Nevertheless, the good results obtained give us the opportunity to envisage the system evolves towards closed loop control and automatic synthesis of the stimulation patterns generating the desired movement. To achieve this goal, some preliminary researches have to be carried out, beginning with a specific modelling that can be used in the context of Functional Electrical Stimulation (FES). The main issues concern muscle modelling including the interaction with the skeleton, fatigue, FES parameters as inputs, and the identification of dynamic parameters, and afterwards, the motion synthesis and the closed loop control based on this model. Besides, the scientific approach is the same as in robotics so that the theoretical tools used in the control theory are the same and directly applicable. This paper describes the results obtained in the previous project SUAW and how we attempt, through the new project DEMAR, to enhance the global performances of the system.

Published
2004

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