Longitudinal and topographical organization of the olivary projection to the cat ansiform lobule

doi:10.1016/0306-4522(82)90090-2

Neuroscience

Volume 7, Issue 11, November 1982, Pages 2657-2676

https://doi.org/10.1016/0306-4522(82)90090-2 Get rights and content

Abstract

This study on the organization of the olivary projections to the ansiform lobule in the cat was aimed at defining the longitudinal zonal pattern and the internal topography within the zones.

The horseradish peroxidase method was used. Two types of injections were made: large injections covering the full extent of small groups of folia, and small injections aimed to be restricted to the single zones proposed by Voogd.

It was shown that olivary projections to these parts of the cerebellum originate from the dorsal and medial accessory nuclei and from the principal nucleus, in agreement with previous studies. Moreover it was found that the ventral lamella and the dorsal lamella (and bend) of the principal nucleus give rise to two distinct, non-overlapping, cerebellar projections to D1 and D2 zones, respectively. It is thus concluded that in the cat four separate olivo-cerebellar strips, corresponnding to the C2, C3, D1 and D2 zones of Voogd, are present in the ansiform lobule.

In addition a transverse rostro-caudal organization was found, in which discrete regions of each olivary subdivision are connected to discrete areas of the crural cortex, within each olivo-cerebellar strip. The old idea of a point-to-point topography in the olivo-cerebellar system is consequently still valid, being compatible with the now proven longitudinal zonal pattern of the olivo-ansiform projection.

The fact that the two subdivisions of the principal olive, here shown to project to separate D1 and D2 zones of the ansiform lobule, receive specific sets of afferents suggests that the two cortical zones are part of two different cerebellar operational units.

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Longitudinal and topographical organization of the olivary projection to the cat ansiform lobule

Abstract

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Brain Res.

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Brain Res.

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Selective central control of dynamic gamma motoneurons utilized for the functional classification of gamma cells

A rubro-olivary pathway—I. Identification of a descending system for control of the dynamic sensitivity of muscle spindles

Expl. Brain Res.

The spatial organization of climbing fibre branching in the cat cerebellum

Expl. Brain Res.

Topographical localization in the olivo-cerebellar projection: an electrophysiological study in the cat

J. comp. Neurol.

Projections to the inferior olive of the cat—II. Comparisons of input from the gracile, cuneate and the spinal trigeminal nuclei

J. comp. Neurol.

Projections to the inferior olive of the cat—I. Comparisons of input from the dorsal column nuclei, the lateral cervical nucleus, the spino-olivary pathways, the cerebral cortex and the cerebellum

J. comp. Neurol.

The Brain Stem of the Cat. A Cytoarchitectonic Atlas with Stereotaxic Coordinates

Projections of the dorsal column nuclei and the spinal cord on the inferior olive in the cat

J. comp. Neurol.

Experimentelle Untersuchungenüber die Olivo-Cerebellare Lokalisation

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Adv. anat. embryol. cell. Biol.

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J. comp. Neurol.

A study of afferent input to the inferior olivary complex in the rat by retrograde axonal transport of horseradish peroxidase

J. comp. Neurol.

Sagittal organization of olivocerebellar and reticulo-cerebellar projections: autoradiographic studies with35S-Methionine

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Organization of afferents from the brain stem nuclei to the cerebellar cortex in the cat

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The parasagittal zonation within the olivo-cerebellar projection—I. Climbing fiber distribution in the vermis of cat cerebellum

J. comp. Neurol.

The parasagittal zonation within the olivo-cerebellar projection—II. Climbing fiber distribution in the intermediate and hemispheric parts of cat cerebellum

J. comp. Neurol.

Sagittal organization of olivocerebellar and reticulo-cerebellar projections: autoradiographic studies with³⁵S-Methionine