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Text
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URL Address
<a href="http://doi.org/10.1159/000113918" target="_blank" rel="noreferrer noopener">http://doi.org/10.1159/000113918</a>
Rights
Article information provided for research and reference use only. All rights are retained by the journal listed under publisher and/or the creator(s).
Pages
273-286
Issue
6
Volume
40
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Dublin Core
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Title
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The Red Nucleus And Mesencephalic Tegmentum In A Ranid Amphibian - A Cytoarchitectonic And Hrp Connectional Study
Publisher
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Brain Behavior and Evolution
Date
A point or period of time associated with an event in the lifecycle of the resource
1992
1992-12
Subject
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accessory optic; amphibian; Behavioral Sciences; brain-stem; cerebellar afferents; cerebellum; descending spinal pathways; edinger-westphal nucleus; frog; horseradish-peroxidase; interstitial nucleus; midbrain; Neurosciences & Neurology; north-american; oculomotor; of cajal; opossum; red nucleus; reticular formation; retrograde tracer; rubrospinal tract; topological analysis; Zoology
Creator
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Larsonprior L J; Cruce W L R
Description
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Movement control in vertebrates is a complex function that is known to involve several parallel systems. In amphibians, which lack the isocortical structures shown in mammals to initiate and control voluntary movements, supraspinal motor control systems have received surprisingly little attention. Because amphibians lack a corticospinal equivalent, coordination and control of all movement strategies must take place in non-cortical, supraspinal integrating centers. The rubro-cerebello-rubrospinal circuit is likely to represent a major motor control system in such vertebrates. In this anatomical investigation four mesencephalic tegmentospinal projection nuclei are described in ranid amphibians (Rana catesbiana and Rana pipiens): reticular formation, accessory optic complex, interstitial nucleus of Cajal, and the red nucleus. The red nucleus, which shows no distinct somatotopic organization, can be distinguished because it is the only one of the four that is predominantly contralateral in its projections. Horseradish peroxidase injections into the tegmentum and the cerebellum demonstrated that the red nucleus also maintains reciprocal connections with the cerebellum via the deep cerebellar nucleus. These connections could not be localized to any distinct region in the deep cerebellar nuclear mass, suggesting that this represents a single cerebellar recipient nucleus. Thus, anuran amphibians are shown to possess the major pathways that comprise the rubro-cerebello-rubrospinal circuitry in mammals.
Identifier
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<a href="http://doi.org/10.1159/000113918" target="_blank" rel="noreferrer noopener">10.1159/000113918</a>
Format
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Journal Article or Conference Abstract Publication
1992
accessory optic
amphibian
Behavioral Sciences
Brain Behavior and Evolution
brain-stem
cerebellar afferents
Cerebellum
Cruce W L R
descending spinal pathways
edinger-westphal nucleus
frog
horseradish-peroxidase
interstitial nucleus
Journal Article or Conference Abstract Publication
Larsonprior L J
midbrain
Neurosciences & Neurology
north-american
oculomotor
of cajal
opossum
red nucleus
reticular formation
retrograde tracer
rubrospinal tract
topological analysis
Zoology