Region- and age-dependent variations of muscle fibre properties

Acta histochemica
K PunktH Hilbig

Abstract

The cytophotometric-morphometrical analysis of extensor digitorum longus and soleus muscles of 2.5 and 18 months old rats revealed regional and age-dependent differences in fibre type distribution, fibre area and fibre type related-enzyme activities which characterize contractility and metabolic profile. Variations along the longitudinal axis from the origin to the insertion and along three transversal axes from superficial to deep were found dependent on the muscle investigated. For example, the fibres of extensor digitorum longus muscle showed increased contractile and glycolytic capacities near insertion and the fibres of soleus muscle increased oxidative capacity in its middle part. Furthermore, the contribution of the fibre type that is dominant in a muscle (fast-glycolytic fibre type in extensor digitorum longus and slow-oxidative fibre type in soleus muscle) to the total number of fibres increased from origin to insertion by 15 and 30%, respectively. Along the superficial-deep axes the oxidative capacity of all fibres increased, the most in fast fibres of the soleus muscle by approximately 50%. In soleus muscle, a decrease of cross areas of all fibre types from superficial to deep was found, correlating negatively with t...Continue Reading

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Citations

Jan 1, 2009·Animal : an International Journal of Animal Bioscience·K M F T BarrosF Canon
Aug 28, 2015·Journal of Physical Therapy Science·Ryo Miyachi, Toshiaki Yamazaki
Mar 7, 2006·The Journal of Urology·Yasuhiro SuminoHiromitsu Mimata
May 28, 2013·Experimental Physiology·R A O'ConnellK D O'Halloran
May 19, 2004·Acta histochemica·Karla PunktGerhard Asmussen
Aug 16, 2002·Experimental and Toxicologic Pathology : Official Journal of the Gesellschaft Für Toxikologische Pathologie·Karl-Friedrich KreyKarla Punkt
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Mar 21, 2013·Muscle & Nerve·Ioannis P KalpidisMaria Albani
Jul 13, 2014·FASEB Journal : Official Publication of the Federation of American Societies for Experimental Biology·Malene E LindholmCarl J Sundberg
Aug 4, 2021·Acta Biomaterialia·Kay LeichsenringMarkus Böl
Nov 9, 2021·The Journal of Clinical Endocrinology and Metabolism·Yufei ZhaoXin-Gui Peng

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