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Descending inputs to caudal cochlear nucleus in cats: A horseradish peroxidase (HRP) study

✍ Scribed by Kane, Eileen S.

Publisher: Wiley (John Wiley & Sons)
Year: 1976
Tongue: English
Weight: 846 KB
Volume: 146
Category: Article
ISSN: 0002-9106
DOI: 10.1002/aja.1001460406

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✦ Synopsis

Abstract

After HRP injections into the octopus cell area of the cat cochlear nucleus, only periolivary neurons of the superior olivary complex (SOC) reacted. Elongate neurons in the lateral periolivary nuclei (ipsilateral to the injection) and multipolar neurons in ventromedial periolivary regions (contralateral to the injection) contained granules. No neurons in the main SOC nuclei or higher auditory nuclei reacted, despite a wide range of HRP concentrations. Thus, neurons from the SOC to the octopus cell area of the cochlear nucleus seem to be entirely periolivary and not entirely equivalent to neurons providing collaterals to the olivocochlear bundle.

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The leopard frog optic tectum is the principal target of the contralateral retina. The retinal terminals form a topographic map of the visual field. The tectum also receives bilateral topographic input from a midbrain structure called nucleus isthmi. In this study we determined the relative strength