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Distribution of different fibre types in human skeletal muscles: 2. A study of cross-sections of whole m. vastus lateralis
Department of Neurology, University of Umeå.
Department of Neurology, University of Umeå.
1983 (English)In: Acta Physiologica Scandinavica, ISSN 0001-6772, E-ISSN 1365-201X, Vol. 117, no 1, p. 115-22Article in journal (Refereed) Published
Abstract [en]

In order to determine the total number of fibres and the extent to which the relative occurrence of different fibre types varies within m. vastus lateralis, 15 micrometers thick cross-sections of whole muscles were prepared. The total number of type 1 and type 2 fibres was determined in every 48th square millimetre of the section, and the results thus obtained were analysed using a computer program allowing an assessment of bivariate data in the form of contour plots. The total number of fibres varied both in proximal to distal direction in the same muscle and between individuals. No obvious correlation existed between the mean fibre area and the muscle cross-sectional area. The proportion of type 1 fibres in the whole muscle varied between individuals (from 44% to 57%) with a mean value for all five of 52%. The distribution of different fibre types varied within the muscle, mainly as a function of depth, with a predominance to type 2 fibres at the surface and type 1 fibres in deeper regions of the muscle. Thus, the fibre type distribution in m. vastus lateralis is not random. This must be taken into consideration when data on fibre type composition are compared with functional variables

Place, publisher, year, edition, pages
1983. Vol. 117, no 1, p. 115-22
Identifiers
URN: urn:nbn:se:ltu:diva-5409Local ID: 381f6ac0-961b-11de-8da0-000ea68e967bOAI: oai:DiVA.org:ltu-5409DiVA, id: diva2:978283
Note
Upprättat; 1983; 20090831 (andbra)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2017-11-24Bibliographically approved

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