Technical contribution
A chronically implantable multiple micro-electrode system with independent control of electrode positionsUn systeme de micro-electrodes multiples implantable chroniquement avec controle independant de la position des electrodes

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Abstract

A chronically implantable, multiple micro-electrode system for use with unanesthetized animals is described. The system may be left on the animal's head for extended periods of time, yet its parts can be decoupled so that electrodes are easily changed. The device is comparatively small, provides for independent control of several closely spaced micro-electrodes and is designed so that a single implant allows for sets of electrode penetrations over a relatively large expanse of neural tissue. The system has been used for recording simultaneously from several individually selected neurons in the motor cortex of an unanesthetized monkey, with excellent results.

Résumé

L'auteur décrit un système de micro-électrodes multiples implantable chroniquement, utilisable chez des animaux sans anesthésie. Ce système peut être laissé sur le tête de l'animal pendant des périodes prolongées, toutefois ses différentes parties peuvent être séparées de telle sorte que des électrodes soient aisément changées. Ce système est relativement petit et fournit un contrôle indépendant de plusieurs micro-électrodes rapprochées et il est dessiné de telle sorte qu'une seule implantation permet la pénétration de groupes d'électrodes sur une étendue relativement grande de tissus nerveux. Ce système a été utilisé pour l'enregistrement simultané de plusieurs neurones individuellement sélectionnés du cortex motour d'un singe non-anesthésié avec d'excellents résultats.

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    Citation Excerpt :

    To achieve a sufficient sample, nearly all behavioral neurophysiology experiments rely on aggregating data across behavioral trials as well as across behavioral sessions. Efforts to record simultaneously from multiple moveable microelectrodes in monkey began in the 1970s (Humphrey, 1970), as were chronically implanted microwire arrays (Chorover and Deluca, 1972). A number of predecessors to current-day multielectrode solutions for monkeys were developed and first tested in the 1980s, including moveable quartz-glass coated electrodes (Reitbock and Werner, 1983), silicon-based multielectrode probes (Campbell et al., 1989; Drake et al., 1988) and stainless-steel housed linear electrode arrays (Barna et al., 1981).

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