Considerations on Improving the Design of Cuff Electrode for ENG Recording - Geometrical Approach, Dedicated IC, Sensitivity and Noise Rejection

Fabien Soulier 1 Lionel Gouyet 1 Guy Cathébras 1 Serge Bernard 1, 2 David Guiraud 1 Yves Bertrand 2
1 DEMAR - Artificial movement and gait restoration
LIRMM - Laboratoire d'Informatique de Robotique et de Microélectronique de Montpellier, CRISAM - Inria Sophia Antipolis - Méditerranée
2 SysMIC - Conception et Test de Systèmes MICroélectroniques
LIRMM - Laboratoire d'Informatique de Robotique et de Microélectronique de Montpellier
Abstract : Cuff electrodes have several advantages for in situ recording of ENG signal. They are easy to implant and not very invasive for the patient. Nevertheless, they are subject to parasitic background noise, especially the EMG generated by the muscles. We show that the use of large numbers of poles can increase the sensitivity of cuff electrodes as well as their selectivity with respect to a efficient noise rejection. We investigate several configurations and compare the performances of a tripolar cuff electrode versus a multipolar one in numerical simulation. One the other hand the use of cuff electrodes leads to the recording of the sum of the signals generated by all the axons within the nerve. This puts in evidence the need of signal separation techniques that require a large amount of information. Again, we show that multipolar electrodes can solve this problem since poles can be switched one to another, provided that they are distributed along a regular tessellation. Finally, we present the structure of an ASIC preamplifier aimed to obtain the Laplacian of the potential by spatial filtering and rejecting low-frequency noise.
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Communication dans un congrès
BIODEVICES: Biomedical Electronics and Devices, Jan 2008, Funchal, Madeira, Portugal. International Conference on Biomedical Electronics and Devices, pp.180-185, 2008, 〈http://www.biodevices.org/Biodevices2008/〉
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Fabien Soulier, Lionel Gouyet, Guy Cathébras, Serge Bernard, David Guiraud, et al.. Considerations on Improving the Design of Cuff Electrode for ENG Recording - Geometrical Approach, Dedicated IC, Sensitivity and Noise Rejection. BIODEVICES: Biomedical Electronics and Devices, Jan 2008, Funchal, Madeira, Portugal. International Conference on Biomedical Electronics and Devices, pp.180-185, 2008, 〈http://www.biodevices.org/Biodevices2008/〉. 〈lirmm-00334769〉

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