Publicação: Morphological aspects of rabbit masseter muscle after cervical sympathectomy
Nenhuma Miniatura disponível
Data
2001-08-07
Orientador
Coorientador
Pós-graduação
Curso de graduação
Título da Revista
ISSN da Revista
Título de Volume
Editor
Tipo
Artigo
Direito de acesso
Acesso restrito
Resumo
The objective of this paper was to study the effect of sympathetic innervation on morphological and histochemical aspects of skeletal muscle tissue. Rabbit masseter muscle was studied using histochemical and immunohistochemical methods for periods of up to 18 months post-sympathectomy. The morphological and enzymatic characteristics of control masseter muscles were similar on both the left and right sides. The main features were muscle fibres with a mosaic pattern and a predominance of type IIa fibres, followed by type I. Type IIb fibres showed very low frequency. Sympathectomized animals showed varying degrees of metabolic and morphological alterations, especially 18 months after sympathectomy. The first five groups showed a higher frequency of type I fibres, whilst the oldest group showed a higher frequency of type lib fibres. In the oldest group, a significant variation in fibre diameter was observed. Many fibres showed small diameter, atrophy, hypertrophy, splitting, and necrosis. Areas with fibrosis were observed. Thus cervical sympathectomy induced morphological alterations in the masseter muscles. These alterations were, in part, similar to both denervation and myopathy. These findings indicate that sympathetic innervation contributes to the maintenance of the morphological and metabolic features of masseter muscle fibres.
Descrição
Palavras-chave
Histochemistry, Immunohistochemistry, Masseter muscle, Morphology, Rabbit, Sympathectomy, adrenergic system, animal cell, autonomic denervation, cervical spine, controlled study, enzyme analysis, frequency analysis, immunohistochemistry, masseter muscle, morphology, muscle cell, nerve fiber, nonhuman, priority journal, rabbit, sympathectomy, Adipose Tissue, Animals, Atrophy, Cervical Plexus, Fibrosis, Hypertrophy, Masseter Muscle, Muscle Fibers, Fast-Twitch, Muscle Fibers, Slow-Twitch, Necrosis, Phagocytosis, Rabbits
Idioma
Inglês
Como citar
International Journal of Experimental Pathology, v. 82, n. 2, p. 123-128, 2001.
