Morphological characteristics of neuromuscular junctions of the opossum (Didelphis albiventris) extraocular muscles: a scanning-electron-microscopic study

dc.contributorUniversidade Estadual Paulista (Unesp)
dc.creatorMatheus, Selma Maria Michelin [UNESP]
dc.creatorSoares, J. C. [UNESP]
dc.date2015-12-07T15:29:31Z
dc.date2015-12-07T15:29:31Z
dc.date2000
dc.date.accessioned2023-09-12T07:24:08Z
dc.date.available2023-09-12T07:24:08Z
dc.identifierhttp://dx.doi.org/10.1159/000016748
dc.identifierCells, Tissues, Organs, v. 166, n. 4, p. 330-337, 2000.
dc.identifier1422-6405
dc.identifierhttp://hdl.handle.net/11449/130816
dc.identifier10.1159/000016748
dc.identifier10867434
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/8780115
dc.descriptionThree types of neuromuscular junctions were described in the extraocular muscles of the opossum. The present study demonstrates the three-dimensional characteristics of these neuromuscular junctions after HCl connective tissue digestion. Adult opossum of both sexes were used and the neuromuscular junctions of the extraocular muscles were examined after removal of the intramuscular connective tissue and basal layer. This material was examined with a scanning electron microscope. Two types of 'en plaque' neuromuscular junction were described: the continuous type revealed elongated and branched primary synaptic grooves separated from each other by sarcolemma protuberances with different sizes, and the discontinuous or punctiform type which presents very shallow and discontinuous grooves when compared with the former. The multiple neuromuscular junctions were observed as two or three junctions associated with the same muscular fiber. The multiple junctions were present in thin fibers (around 11 microm caliber); the en plaque junctions were associated with large diameter fibers (around 21 microm). This study confirms and reveals the detailed morphological characteristics of the three neuromuscular junction types previously described by transmission electron microscope in the extraocular muscles of opossum.
dc.descriptionDepartamento de Anatomia, Instituto de Biociências de Botucatu (IBB), Universidade Estadual Paulista (UNESP), Botucatu, SP, Brasil
dc.descriptionDepartamento de Anatomia, Instituto de Biociências de Botucatu (IBB), Universidade Estadual Paulista (UNESP), Botucatu, SP, Brasil
dc.format330-337
dc.languageeng
dc.publisherS. Karger AG, Basel
dc.relationCells, Tissues, Organs
dc.relation1.275
dc.relation0,572
dc.rightsAcesso restrito
dc.sourcePubMed
dc.subjectExtraocular muscles
dc.subjectNeuromuscular junction
dc.subjectScanning electron microscope
dc.subjectOpossum
dc.titleMorphological characteristics of neuromuscular junctions of the opossum (Didelphis albiventris) extraocular muscles: a scanning-electron-microscopic study
dc.typeArtigo


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