発育期マウス骨格筋の筋節長, 筋節数および筋張力の変化

概要

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The purpose of present study was to investigate the relationship between the increase of sarcomere length, sarcomere number and tetanic tension of the extensor digitorum longus muscles during postnatal growth in mice. The following results were obtained ; 1) The cross-sectional area, length of muscle and fiber length increased rapidly up to 7th week. 2) The sarcomere number increased up to 9th week. 3) The tetanic tension per cross-sectional area decreased significantly in 7th week. 4) The maximum value of sarcomere length which was obtained at middle region of the fiber correlated significantly with the tetanic tension per cross-sectional area (the correlation coefficient : r=-0.675). These observations suggest that the local expansion of sarcomere length during postnatal growth affects the tension development. (Jpn. J. Phys. Fitness Sports Med. 1988, 37, 46～50)
日本体力医学会の論文
1988-02-01