Abstract Mammalian skeletal muscle comprises different fiber types, whose identity is first established during embryonic development by intrinsic myogenic control mechanisms and is later modulated by neural and hormonal factors. The relative proportion of the different fiber types varies strikingly between species, and in humans shows significant variability between individuals. Myosin heavy chain isoforms, whose complete inventory and expression pattern are now available, provide a useful marker for fiber types, both for the four major forms present in trunk and limb muscles and the minor forms present in head and neck muscles. However, muscle fiber diversity involves all functional muscle cell compartments, including membrane excitation, excitation-contraction coupling, contractile machinery, cytoskeleton scaffold, and energy supply systems. Variations within each compartment are limited by the need of matching fiber type properties between different compartments. Nerve activity is a major control mechanism of the fiber type profile, and multiple signaling pathways are implicated in activity-dependent changes of muscle fibers. The characterization of these pathways is raising increasing interest in clinical medicine, given the potentially beneficial effects of muscle fiber type switching in the prevention and treatment of metabolic diseases. « Previous | Next Article » Table of Contents This Article doi: 10.1152/physrev.00031.2010 Physiol Rev October 2011 vol. 91 no. 4 1447-1531 » Abstract Free Full Text Free to you Full Text (PDF) Free to you Classifications Article Services Email this article to a friend Alert me when this article is cited Alert me if a correction is posted Similar articles in this journal Similar articles in Web of Science Download to citation manager Citing Articles Load citing article information Citing articles via Web of Science Google Scholar Articles by Schiaffino, S. Articles by Reggiani, C. PubMed Articles by Schiaffino, S. Articles by Reggiani, C. Related Content Load related web page information Current Issue October 2011, 91 (4) Alert me to new issues of Physiol Rev About the Journal Information for Authors Submit a Manuscript Ethical Policies AuthorChoice PubMed Central Policy Reprints and Permissions Advertising Press Copyright © 2011 the American Physiological Society Print ISSN: 0031-9333 Online ISSN: 1522-1210 var gaJsHost = (("https:" == document.location.protocol) ? "https://ssl." : "http://www."); document.write(unescape("%3Cscript src='" + gaJsHost + "google-analytics.com/ga.js' type='text/javascript'%3E%3C/script%3E")); var pageTracker = _gat._getTracker("UA-2924550-1"); pageTracker._trackPageview();
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Fiber Types in Mammalian Skeletal Muscles
Schiaffino, Stefano; Reggiani, Carlo
Follow Physiological Reviews
, Volume 91 (4): 1447
The American Physiological Society – Oct 1, 2011
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