Acessibilidade / Reportar erro

Estudo quantitativo do nervo frênico de rato albino em função do envelhecimento

Resumo

The phrenic nerve of albino rats was studied for age changes in number of fibres, myelin sheath thickness and axon calibre. Nerves were excised from three young and three aged rats. There is no significant morphological differences between nerves from young and aged rats and no difference with age was found in the number of fibres, myelin sheath thickness and axon calibre.


Estudo quantitativo do nervo frênico de rato albino em função do envelhecimento

Romeu Rodrigues de Souza; Ii-Sei Watanabe; Gerson Chadi; Maria Vilma de Araújo

Departamento de Anatomia, Instituto de Ciências Biomédicas da Universidade de São Paulo. Av. Prof. Lineu Prestes. 2.415. Edifício Biomédicas III. - Cidade Universitária - São Paulo - CEP 05508

ABSTRACT

The phrenic nerve of albino rats was studied for age changes in number of fibres, myelin sheath thickness and axon calibre. Nerves were excised from three young and three aged rats. There is no significant morphological differences between nerves from young and aged rats and no difference with age was found in the number of fibres, myelin sheath thickness and axon calibre.

Texto completo disponível apenas em PDF.

Full text available only in PDF format.

AGRADECIMENTO

Trabalho realizado com auxílio do CNPq para R.R.S. (303916/86 BM-FV).

  • BIRREN, J.E. & WALL, P.D. 1956. Age changes in conduction velocity, refractory period, number of fibers, connective tissue space and blood vessels in sciatic nerve of rats. J. Comp. Neurol., 104:1-16.
  • BRONSON, R.T. & HEDLEY-WHITE, T. 1977. Morphometric analysis of the effects of exenteration and enucleation of the development of third and sixth cranial nerves in the rat. J. Comp. Neurol. 176:315-330,
  • CORBIN, K.B. & GARDNER, E.D. 1937. Decrease in number of myelinated fibers in human roots with age. Anat. Rec. 68:63-74.
  • DUNCAN, D., 1934. A determination of the number of nerve fibers in the eighth thoracic and the largest lumbar ventral roots of the albino rat. J. Comp. Neurol. 59:47-60.
  • FRAHER, J.P. 1978. Quantitative studies on the maturation of ventral and peripheral parts of individual ventral motoneuron axons. J. Anat. 123:509-533.
  • FRIEDE, R.L. & SAMORAJSKI, T. 1967. Relation between the number of Myelin lameliae and axon circunference in fibers of vagus and sciatic nerves of mice. J. Comp. Neurol. 130:223-232.
  • KERNS, J.M. 1980. Postnatal differentiation of the rat troclear nerve. J. Comp. Neurol. 189:291-306.
  • LANGFORD, L.A. & SCHMIDT, R.F. 1983. An electron microscopic analysis of the left phrenic nerve in the rat. Anat. Rec. 205:207-213.
  • REXED, B. 1944. Contributions to the knowledge of the postnatal development of the peripheral nervous system in man. Acta Psichiat. Neurol. Suppl. 33, 206 p.
  • STEER, J.M. 1971. Some observations on the fine structure of rat dorsal spinal nerve roots. J. Anat. 109:467-485.
  • WILLIAMS, P.L. & WENDELL-SMITH, C.P. 1971. Some additional parametric variations between peripheral nerve fibre populations. J. Anat. 109:505-526.
  • WILSON, A.S. 1968. Investigations on the innervation of the diaphragm in cats and rodents. Anat. Rec. 162:425-433.

Datas de Publicação

  • Publicação nesta coleção
    10 Ago 2009
  • Data do Fascículo
    1990
Sociedade Brasileira de Zoologia Caixa Postal 19020, 81531-980 Curitiba PR Brasil, Tel./Fax: +55 41 3266-6823, - Curitiba - PR - Brazil
E-mail: sbz@bio.ufpr.br