Data/hora: 06/06/2024 05:20:25

Provedor de dados: | 56
País: | Brazil
Título: | A comparative study of aging of the elastic fiber system of the diaphragm and the rectus abdominis muscles in rats
Autores: | Rodrigues,C.J.; Rodrigues Junior,A.J.
Data: | 2000-12-01
Ano: | 2000
Palavras-chave: | Aging; Elastin; Extracellular matrix; Diaphragm; Rectus abdominis.
Resumo: | In the present study the age-related changes of the striated muscle elastic fiber system were investigated in the diaphragm and rectus abdominis muscles of 1-, 4-, 8- and 18-month-old rats. The activation patterns of these muscles differ in that the diaphragm is regularly mobilized tens of times every minute during the entire life of the animal whereas the rectus abdominis, although mobilized in respiration, is much less and more irregularly activated. The elastic fibers were stained by the Verhoeff technique for mature elastic fibers. Weigert stain was used to stain mature and elaunin elastic fibers, and Weigert-oxone to stain mature, elaunin and oxytalan elastic fibers. The density of mature and elaunin elastic fibers showed a progressive increase with age, whereas the amount of oxytalan elastic fibers decreased in both diaphragm and rectus abdominis muscles and their muscular fascias. These age-related quantitative and structural changes of the elastic fiber system may reduce the viscoelastic properties of the diaphragm and rectus abdominis muscles, which may compromise the transmission of tensile muscle strength to the tendons and may affect maximum total strength.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2000001200008
Editor: | Associação Brasileira de Divulgação Científica
Relação: | 10.1590/S0100-879X2000001200008
Formato: | text/html
Fonte: | Brazilian Journal of Medical and Biological Research  v.33 n.12 2000
Fonte: | info:eu-repo/semantics/openAccess