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Quantitative morphology of stimulation-induced damage in rabbit fast-twitch skeletal muscles
Department of Human Anatomy and Cell Biology, University of Liverpool.
Department of Statistics & Computational Mathematics, University of Liverpool.
Department of Human Anatomy and Cell Biology, University of Liverpool.
1992 (English)In: Cell and Tissue Research, ISSN 0302-766X, E-ISSN 1432-0878, Vol. 269, no 2, p. 195-204Article in journal (Refereed) Published
Abstract [en]

The purpose of this study was to examine the contention that stimulation-induced damage, resulting in degeneration with subsequent regeneration, plays a major role in the transformation of fibre type brought about by chronic electrical stimulation. Data from histological and histochemical sections of 9-day-stimulated rabbit fast-twitch muscles were analysed with multivariate statistical techniques. Fibre degeneration and regeneration varied non-systematically between sample areas at any given cross-sectional level. In the extensor digitorum longus muscle, but not in the tibialis anterior, there was more degeneration in proximal than in distal portions of the muscle. The extensor digitorum longus muscle consistently showed more degeneration than the tibialis anterior muscle. Degeneration was less extensive for an intermittent pattern of stimulation that delivered half the aggregate number of impulses of continuous stimulation. Degeneration and regeneration varied markedly between individual rabbits in each of the groups. Sections that revealed the most degeneration and regeneration also had more fibres that reacted positively with an anti-neonatal antibody. Rigorous analysis of different sources of variation has helped to explain apparent conflicts in the literature. The incidence of muscle fibre damage in the stimulated tibialis anterior muscle is low, showing that the contribution of degenerative-regenerative phenomena to fibre type conversion in this muscle is insignificant.

Place, publisher, year, edition, pages
1992. Vol. 269, no 2, p. 195-204
Identifiers
URN: urn:nbn:se:ltu:diva-6259DOI: 10.1007/BF00319609Local ID: 4761bd70-7b20-11dc-a72d-000ea68e967bOAI: oai:DiVA.org:ltu-6259DiVA: diva2:979136
Note
Upprättat; 1992; 20071015 (lotfra)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2017-11-24Bibliographically approved

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