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Am J Vet Res. 1985 Apr;46(4):939-41.

Variation of fiber types in the triceps brachii, longissimus dorsi, gluteus medius, and biceps femoris of horses.

Abstract

The distribution of type-I and type-II fibers in 9 different parts of the musculi triceps brachii, longissimus dorsi, gluteus medius, and biceps femoris was studied to determine whether biopsies from these muscles give reliable information. All 4 investigated muscles were not homogeneous in their fiber-type distribution. Large differences existed among different muscle parts. The percentage of type-I fibers increased toward the deeper and cranial parts of the muscles. In the same zone of the gluteus muscle, differences of 30% were found for type-I fibers. Therefore, results obtained by biopsies of muscles must be interpreted with caution.

PMID:
4014843
[PubMed - indexed for MEDLINE]
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