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vol.17 issue1SUPERIOR THYROID ARTERY: ORIGIN, COLLATERAL AND GLANDULAR BRANCHESSEASONAL MORPHOLOGICAL VARIATIONS OF BULBOURETHRAL GLANDS OF Chinchilla laniger (GREY) IN CAPTIVITY author indexsubject indexarticles search
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Revista chilena de anatomía

Print version ISSN 0716-9868

Abstract

DE CASTRO RODRIGUES, Antonio et al. COMPARATIVE STUDY BETWEEN THE FIBER-TYPE COMPOSITION IN THE FLEXOR AND EXTENSOR MUSCLES IN THE PIG (Sus scrofa). Rev. chil. anat. [online]. 1999, vol.17, n.1, pp.51-58. ISSN 0716-9868.  http://dx.doi.org/10.4067/S0716-98681999000100008.

SUMMARY: A description is provided of the different fiber-type composition of two flexors and two extensor muscles of the pig. In addition, cross-section areas of each fiber type and an estimation of the relative myonuclei by the muscle fibers in the tested muscles are also provided. Four muscles were selected for study, based in their suitability for future neurophysiological analysis as components of segmental motor system, and on their homologies with muscles in other vertebrates. The tested muscles were soleus, flexor digitorum superficialis (FDS), extensor digitorum longus (EDL) and extensor halux longus (EDHL). Serial sections of these muscles were stained for NADH-diaphorase and Haematoxilin and Eosin (HE). The relationships between the present results and previous findings on homologous muscles of the mammalian hindlimb are discussed.

Keywords : NADH; Diaforase; Muscle fiber; Pig.

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