PMID: 11902760Mar 21, 2002Paper

Changes in fibre type composition of gluteus medius and semitendinosus muscles of Dutch Warmblood foals and the effect of exercise during the first year postpartum

Equine Veterinary Journal
E DingboomW A Weijs

Abstract

In order to obtain broader insights into the equine musculoskeletal system, we studied the fibre type composition of 2 locomotory muscles in biopsies from Dutch Warmblood foals taken at 3 different ages in the first year postpartum. The muscle fibre types were determined histochemically as well as immunohistochemically. ATPase-characterised IIB fibres appear to express either IId or type lIa plus IId myosin heavy chain (MHC). A high percentage of fibres classified as IIA with ATPase expressed both fast types of MHC. The type I classification by the 2 methods matched almost completely. There was an increase with age of fibres expressing I and IIa MHC in the gluteus medius. At the same time, there was a decrease of fibres expressing IId MHC and fibres co-expressing MHC IIa and IId. MHC expression of the semitendinosus muscle did not change over time at first, but from age 22-48 weeks there was a decrease in the percentage of type IId fibres. In general, the gluteus medius contained more type I fibres but fewer type IId fibres compared to the semitendinosus. At most ages the fibre type compositions of both muscles correlated with one another. To examine the effect of exercise, one-third of the foals were given box rest, one-third ...Continue Reading

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Citations

Apr 4, 2007·Equine Veterinary Journal. Supplement·K EizemaM E Everts
Nov 3, 2007·American Journal of Veterinary Research·Nancy J RietbroekMaria E Everts
Aug 2, 2006·Journal of Anatomy·Hazel SutherlandJonathan C Jarvis
Apr 4, 2007·Equine Veterinary Journal. Supplement·N J RietbroekM E Everts
Jun 29, 2005·The Journal of Histochemistry and Cytochemistry : Official Journal of the Histochemistry Society·Karin EizemaMaria E Everts
Nov 15, 2006·The Journal of Histochemistry and Cytochemistry : Official Journal of the Histochemistry Society·Karin EizemaMaria E Everts
Nov 3, 2007·American Journal of Veterinary Research·Nancy J RietbroekMaria E Everts
Mar 24, 2012·Animal : an International Journal of Animal Bioscience·K LeissonT Seene
Aug 19, 2003·The Journal of Histochemistry and Cytochemistry : Official Journal of the Histochemistry Society·Karin EizemaWim A Weijs

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