Morphological relations of sarcolemma, cytoplasmic organelles, and nuclei of the junctional and extrajunctional zones
Pignocchino, P.; Piemontesi, F.
Bollettino della Societa Italiana di Biologia Sperimentale 58(10): 591-595
1982
ISSN/ISBN: 0037-8771 PMID: 6288059 Document Number: 193330
In intercostal rat muscles an ultrastructural comparison has been made of the relationships existing in the myofibre between sarcolemma, cytoplasmic organules and nuclei in the end-plate sole and extrajunctional areas. Remarkable differences are described. Particularly, in the end-plate sole area relationships between the perinuclear membrane and the floor of the infoldings are very tight. In the extrajunctional areas, close relationships between the portion of perinuclear membrane that is turned towards the interior of the myofibre and the membranous structures of the triad are frequent.