Morphometric analysis of myelinated axons during maturation in the fasciculus gracilis and fasciculus cuneatus of rats. A transmission electron microscopy study

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dc.creatorMata, João Roberto da
dc.creatorSabóia-Morais, Simone Maria Teixeira
dc.creatorMorais, José Oscar Rodrigues
dc.date.accessioned2018-08-17T11:54:48Z
dc.date.available2018-08-17T11:54:48Z
dc.date.issued2001
dc.description.abstractThe process of myelination is an important event in the maturation of the nervous system. In this study, the fasciculus gracilis and fasciculus cuneatus in the first and sixth cervical segments of the spinal cord of a mutant strain of Wistar rats, were studied by electron microscopy in order to determine the perimeter of the axons, the thickness of the myelin sheath, and the diameter and perimeter of the nerve fibers. At birth, the fasciculus gracilis and fasciculus cuneatus had unmyelinated fibers, but by the fifth day after birth myelination was in progress. The mean perimeter of nerve fibers was significantly greater (p< 0.05) in the fasciculus cuneatus compared to the fasciculus gracilis at 15, 20 and 120 days of age. The diameter of the fibers, perimeter of the axons and thickness of the myelin sheath were more developed in the fasciculus cuneatus than in the fasciculus gracilis at all ages studied. The axons were relatively thinner 15-20 days after birth than at 20-120 days after birth. The myelination of the fasciculi gracilis and cuneatus in the spinal cord of this mutant strain, agreed with previous reports indicating that the mutation, which causes the rats to have bare skin, had no significant effect on myelination in the anatomical areas studied.pt_BR
dc.identifier.citationMATA, José Roberto da; MORAIS, José Oscar Rodrigues de; SABÓIA-MORAIS, Simone Maria Teixeira. Morphometric analysis of myelinated axons during maturation in the fasciculus gracilis and fasciculus cuneatus of rats. A transmission electron microscopy study. Brazilian Journal of Morphological Sciences, São Paulo, v. 18, n. 1, p. 1-6, 2001.pt_BR
dc.identifier.issn0102-9010
dc.identifier.urihttp://repositorio.bc.ufg.br/handle/ri/15647
dc.language.isoengpt_BR
dc.publisher.countryBrasilpt_BR
dc.publisher.departmentInstituto de Ciências Biológicas - ICB (RG)pt_BR
dc.rightsAcesso Abertopt_BR
dc.subjectAxonspt_BR
dc.subjectFasciculi cuneatus and gracilispt_BR
dc.subjectMorphometrypt_BR
dc.subjectMyelinationpt_BR
dc.subjectTransmission electron microscopypt_BR
dc.titleMorphometric analysis of myelinated axons during maturation in the fasciculus gracilis and fasciculus cuneatus of rats. A transmission electron microscopy studypt_BR
dc.typeArtigopt_BR

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