Variation of fiber types in the triceps brachii, longissimus dorsi, gluteus medius, and biceps femoris of horses |
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Authors: | R van den Hoven T Wensing H J Breukink A E Meijer T A Kruip |
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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. |
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