各種の筋活動抑制に対するラット足関節底屈筋の反応 Responses of ankle plantar-flexors to various inhibitions of muscular activities in rats

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著者

    • 大原 誠 OHARA Makoto
    • 鹿屋体育大学, スポーツ科学講座 Department of Physiology and Biomechanics, National Institute of Fitness and Sports
    • 吉永 智雄 YOSHINAGA Tomoo
    • 鹿屋体育大学, スポーツ科学講座 Department of Physiology and Biomechanics, National Institute of Fitness and Sports
    • 大平 充宣 OHIRA Yoshinobu
    • 鹿屋体育大学, スポーツ科学講座 Department of Physiology and Biomechanics, National Institute of Fitness and Sports

抄録

Effects of hindlimb suspension, tenotomy, denervation, and⁄or the combination of these models on plantar-flexors were studied in adult rats. Suspension-induced atrophy was not promoted by addition of tenotomy. But the magnitude of the atrophy was advanced if denervation or both denervation and tenotomy were combined with 5-day hindlimb suspension. Similar effects were noted in the cross-sectional area of single muscle fibers, especially of slow-twitch fibers. A shift of muscle fiber type from slow-to fast-twitch type was also induced mainly in soleus. The atrophy and fiber transformation were closely associated with a passive shortening of muscle due to the plantarflexion of ankle and/or tenotomy and a disappeared electrical activity caused by denervation. The fiber atrophy, but not the shift of fiber type, was further advanced by the combination of tenotomy and denervation. It is suggested that muscle atrophy is caused by the decreased fiber size and protein content. The water content was also reduced proportionally.

収録刊行物

  • 宇宙生物科学 = Biological sciences in space  

    宇宙生物科学 = Biological sciences in space 10(2), 112-121, 1996-09 

    日本宇宙生物科学会

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各種コード

  • NII論文ID(NAID)
    10002856340
  • NII書誌ID(NCID)
    AN10164806
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    09149201
  • NDL 記事登録ID
    4069246
  • NDL 雑誌分類
    ZR1(科学技術--生物学) // ZM33(科学技術--宇宙科学)
  • NDL 請求記号
    Z18-2504
  • データ提供元
    CJP書誌  CJP引用  NDL  J-STAGE 
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