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Träfflista för sökning "L773:0148 639X srt2:(1990-1994)"

Sökning: L773:0148 639X > (1990-1994)

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2.
  • Lexell, Jan, et al. (författare)
  • Growth and development of human muscle : a quantitative morphological study of whole vastus lateralis from childhood to adult age
  • 1992
  • Ingår i: Muscle and Nerve. - : Wiley. - 0148-639X .- 1097-4598. ; 15:3, s. 404-409
  • Tidskriftsartikel (refereegranskat)abstract
    • The mechanisms underlying the increase in volume of muscle tissue, and the functional development of muscle fibers from childhood through adolescence to adult age, have been studied. Cross sections of autopsied whole vastus lateralis muscle from 22 previously physically healthy males, 5 to 37 years of age, were prepared enzyme histochemically (myofibrillar ATPase) and examined morphometrically. The data obtained on muscle cross-sectional area, size, total number, and proportion of type 1 (slow-twitch) and type 2 (fast-twitch) fibers were analyzed using linear regression techniques. The results show that the increase in muscle cross-sectional area from childhood to adult age is caused by an increase in mean fiber size. This is accompanied by a functional development of the fiber population: the proportion of type 2 fibers increases significantly from the age of 5 (approx. 35%) to the age of 20 (approx. 50%), which, in the absence of any discernible effect on the total number of fibers, is most likely caused by a transformation of type 1 to type 2 fibers.
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3.
  • Lexell, Jan, et al. (författare)
  • "Smoothed histograms": a visual aid for the analysis of distributions of muscle fiber areas
  • 1991
  • Ingår i: Muscle and Nerve. - : Wiley. - 0148-639X .- 1097-4598. ; 14:9, s. 826-828
  • Tidskriftsartikel (refereegranskat)abstract
    • The Kernel Density Estimator (KDE) is a versatile nonparametric technique with very good theoretical properties. It is used to obtain "smoothed histograms," which allows several distributions to be presented and analyzed more easily on one graph, and direct combination into average distributions. The application of the KDE method as a visual aid for the analysis of distributions of muscle fiber areas is presented here.
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  • Resultat 1-3 av 3
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tidskriftsartikel (3)
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refereegranskat (3)
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Lexell, Jan (3)
Taylor, Charles (2)
Sjöström, Michael (1)
Taylor, CC (1)
Nordlund, A S (1)
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Luleå tekniska universitet (3)
Lunds universitet (1)
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Engelska (3)
Forskningsämne (UKÄ/SCB)
Medicin och hälsovetenskap (1)

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