A Comparative Study on the Structural Features of Muscle Fibers in Intrinsic Lingual Muscles of 21 Day Old and 9 Month Old Mice Using Light and Electron Microscopy

Abstract

Temelli, A. and Geyikoğlu, F. 2006. A comparative study on the structural features of muscle fibers in intrinsic lingual muscles of 21 day old and 9 month old mice using light and electron microscopy. J. Appl. Anim. Res., 30: 47–51. To compare structural features of muscle fibers in intrinsic lingual muscles of 21 day old and 9 month old mice, the semi-thin sections stained with toluidine blue were examined under light microscope and the thin sections stained with uranyl acetate and lead citrate were examined under JEOL 100SX electron microscope. Two types of fibers in both groups of mice were distinguished (Type 2A, Type 2B). When intrinsic lingual muscles of 21 day old and 9 month old mice were compared, differentiations were observed in distribution of muscle fibers, their compositions and the size and shape of sarcosomes. In addition, the sarcoplasmic reticulum tubules were different between two groups. These differences may be the results of the adaptations of intrinsic lingual muscles of mice in different age groups to feeding behaviours.