HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Google Scholar Articles by Swatland, H. J. Articles by Cassens, R. G. Search for Related Content PubMed PubMed Citation Articles by Swatland, H. J. Articles by Cassens, R. G.

Muscle Growth: The Problem of Muscle Fibers with an Intrafascicular Termination¹

University of Wisconsin, Madison 53706

Abstract

Numerous intrafascicularly terminating fibers were found in several porcine and bovine muscles. They were demonstrated by maceration, microdissection and histological sectioning. The majority of terminations were formed by the gradual tapering of fibers over a length of a few millimeters. Tapered terminations were readily found in thick frozen sections, due to their affinity for methylene blue injected before sectioning, and they were anchored within the endomysium of adjacent normal diameter fibers. Tapered intrafascicular terminations were found in cattle ranging from less than 1 month to 8 years of age. Muscles from variably emaciated and senescent cattle were characterized by fibers of larger diameter than those from younger animals of greater weight. It is suggested that, in developing bovine muscles, intrafascicularly terminating fibers grow at a slower rate than those with completely tendinous insertions, and that, in senescent bovine muscles, intrafascicularly terminating fibers decrease in length by terminal degeneration.

¹ Research supported by the College of Agricultural and Life Sciences, University of Wisconsin, Madison, by the Research Committee of the Graduate School at the University of Wisconsin and by Public Health Service Research Grant FD-00107-14. Muscle Biology Laboratory Manuscript No. 10.

This article has been cited by other articles:

				A. C. Paul and N. Rosenthal Different modes of hypertrophy in skeletal muscle fibers J. Cell Biol., February 18, 2002; 156(4): 751 - 760. [Abstract] [Full Text] [PDF]