Interlayer neurones in the rat superior colliculus: a tracer study using Dil/Di-ASP

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Abstract

Five different populations of interlayer neurones (ILNs) can be described after Dil/Di-ASP tracing in rat superior colliculus (SC). All of these labelled neurones preferentially lay in the rostro-medial part of the SC. Most of them are located in the stratum opticum and in the stratum griseum superficial. Our results indicate that ILNs represent a minority of neurones in the superficial layers but may constitute a substantial population of neurones in the stratum opticum connecting the visual and the multimodal collicular layers.

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