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The zebrafish myotome contains tonic muscle fibers: Morphological characterization and time course of formation
Author(s) -
Marschallinger Julia,
Obermayer Astrid,
Steinbacher Peter,
Stoiber Walter
Publication year - 2013
Publication title -
journal of morphology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.652
H-Index - 74
eISSN - 1097-4687
pISSN - 0362-2525
DOI - 10.1002/jmor.20095
Subject(s) - myotome , biology , zebrafish , tonic (physiology) , vertebrate , anatomy , muscle fibre , ontogeny , ultrastructure , microbiology and biotechnology , neuroscience , skeletal muscle , embryogenesis , somite , genetics , embryo , gene
It is long known that the skeletal muscle of teleost fish contains muscle fibers which are in all probability of a tonic type according to morphological criteria. However, the evidence for the existence of teleost tonic fibers is still confined to a very small number of species, and knowledge concerning their ontogeny and possible functions is even more restricted. A remarkable deficit in this context is that it is not even exactly known whether the zebrafish, which is widely used to study vertebrate developmental biology, has such fibers, or how they arise. The present study demonstrates the existence of tonic fibers in the zebrafish myotome. They are identical with a fiber population previously termed “red muscle rim” fibers. A combined histochemical, immunocytochemical, and ultrastructural approach is used to characterize the morphology and development of these fibers. This study provides a basis for using the zebrafish model system in the future research on the developmental regulation and the functions of tonic fibers. J. Morphol., 2013. © 2012 Wiley Periodicals, Inc.