Volume 5, Issue 7

The Isolated and Perfused Brain of the Guinea‐pig In Vitro

M. Mühlethaler

Laboratoire de Psychophysiologie, Département de Physiologie, CMU, 1 Rue Michel Servet, 1211 Genève 4, Switzerland

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M. de Curtis

Dipartimento di Neurofisiologia, Istituto Neurologico, via Celoria 11, 20133 Milano, Italy

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K. Walton

Department of Physiology & Biophysics, New York University Medical Center, 550 First Avenue, New York, NY 10016, USA

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R. Llinás

Corresponding Author

Department of Physiology & Biophysics, New York University Medical Center, 550 First Avenue, New York, NY 10016, USA

R. Llinás, as aboveSearch for more papers by this author
First published: July 1993
Citations: 115

Abstract

We describe here an isolated and perfused in vitro adult guinea‐pig whole brain preparation which is an extension of the previously described in vitro brainstem–cerebellum preparation, Viability was tested by the analysis of trans‐synaptic responses along the visual pathways following the electrical stimulation of the optic nerve or the optic radiations. The evoked field potentials were recorded in the dorsal lateral geniculate, the superior colliculus and the visual cortex. The distribution of extracellular currents was studied using current source density analysis, in order to determine the amplitude, time course and spatial organization of the synaptic activity at these sites. The study indicates that field potentials were very similar to those described in vivo. These data demonstrate the survival of a complex adult sensory system in vitro and suggest that this preparation can be used for the analysis of multisynaptic circuits in the mammalian brain.

Number of times cited according to CrossRef: 115

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