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Title

The pyramidal tract in rodents. A study of its relations with the posterior column nuclei, dorsolateral reticular formation of the medulla oblongata, and cervical spinal cord - Golgi and electron microscopic observations

AuthorsValverde, Facundo
Issue Date1966
PublisherSpringer
CitationCell and Tissue Research 71: 297- 363 (1966)
AbstractA study of the pyramidal tract and its synaptic relations with cells in the posterior column nuclei, dorsolateral reticular formation of the medulla oblongata, and intermediate gray region of the cervical spinal cord has been made with Golgi and electron microscopic techniques. The cellular organization and morphology, and the fine structure and disposition of the neuropil, in the posterior column nuclei have been studied. It has been found that dendrites of cells in these nuclei appear almost completely covered by large synaptic endings which belong to terminal sensory fibers of the posterior columns. The cell bodies showed very few and small endings which in some instances could be identified with endings of the pyramidal tract. The nature of pyramidal tract influences upon the posterior column nuclei has been discussed based on physiological and morphological data. The relations of the ascending, recurrent pyramidal fibers, including the Henle-Pick bundle, in the dorsolateral reticular formation has been studied. The terminal distribution and relations of the pyramidal tract in the intermediate gray region of the cervical spinal cord has been studied. Evidence has been found that dendrites of some motoneurons receive direct synaptic contacts from pyramidal tract collaterals in the spinal cord. © 1966 Springer-Verlag.
URIhttp://hdl.handle.net/10261/62450
DOI10.1007/BF00332585
Identifiersdoi: 10.1007/BF00332585
issn: 0302-766X
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