Determinación de las características Histoquímicas y Morfométricas del músculo Gluteus Medius en equinos de Silla Francés

Biopsies were taken at depth of 4 and 6 cm in the Gluteus medius muscle of 21 horses Selle Francais of 2 at 3 years old, 7 males and 14 females with out training. The samples were analized by mATPase miofibrillar technique and NADH-TR technique in order to determine the oxidative capacity of the fibers and the area and the lesser diameter were determined. The averages obtained for the fibrillar composition were of 11%, 30%, 26% , 33 % and 19%, 37%, 18% and 25%, for the fibers type 1, HA, IIB oxidative and IIB non oxidative respectively at 4 and 6 cm of depth for male and female. The average obtained for fibrillar composition was 11%, 26%, 28%, 35% and 20%, 37%, 15% and 28% at 4 and 6 cm of depth respectively for the females. The average obtained for fibrillar compositions was 10%, 34%, 24%, 32% and 18%, 37%, 22% and 23% at 4 and 6 cm of depth respectively for the males. The fibrillar composition varies in relation to the depth of the biopsy for the fibers type 1, IIA and IIB between the depth. There are differences significant in the fibrillar compositions only for the fiber type 1 between the depth. In total group there are differences for the fibers type 1, HA, IIB oxidatives and IIB no oxidatives between the depth of biopsie. The area determined at 6 cm of depth was 2,942; 3,433; 4,998 pm 2 in males and females, 2,833; 3,339 and 4,436 pm 2 in the females and 3,051; 3,528; 4,820 µm 2 in the males for the fibers type 1, HA y IIB, respectively. The lesser diameter determined at 6 cm of depth was 52, 56 and 64 pm in the males and females, 50, 54 y 59 pm and 54,58 and 68 pm for the fiber type 1, HA and IIB, respectively. The area and lesser diameter showed significant differences between fibers type 1, HA and ZIB, with the depth of biopsy and there are not significant differences between sex.