Distribution, Density, and Structure of Muscle Spindles in the Vastus Intermedius and the Peroneus Longus Muscles of Sheep

Kouichi Watanabe, Atsushi Suzuki

    研究成果: Article査読

    3 被引用数 (Scopus)

    抄録

    Muscle spindles are not always distributed more in postural muscles with many slow-twitch-oxidative (SO) myofibers than in locomotory muscles with few SO myofibers. The purpose of present study was to examine the distribution, density, and structure of muscle spindles in the vastus intermedius muscle: an antigravity muscle and the peroneus longus muscle: a locomotory muscle in the sheep. Muscle spindles were reconstructed from serial sections at 300 μm intervals throughout the muscles. Myofiber types were classified into SO, fast-twitch-oxidative-glycolytic, and fast-twitch-glycolytic myofibers by differences in histochemical reactivity. No significant difference in the density of muscle spindles (DMS) existed between the vastus intermedius (DMS: 5.3) and peroneus longus (DMS: 5.7) muscles. The muscle spindles were distributed more in the distal portion than in the proximal portion of the vastus intermedius muscle. The muscle spindles were distributed in the proximal and middle portion but hardly in the distal portion of the peroneus longus muscle. Muscle spindles were classified into simple, tandem, and compound muscle spindles. Most of the muscle spindles were the simple type. The differences in size of the muscle spindle and numbers of the intrafusal myofibers were not significant between the two muscles. The results show that the density and structure of the muscle spindles do not differ between the postural and locomotory muscles in the sheep.

    本文言語English
    ページ(範囲)203-220
    ページ数18
    ジャーナルOkajimas Folia Anatomica Japonica
    76
    5
    DOI
    出版ステータスPublished - 1999 12月

    ASJC Scopus subject areas

    • 解剖学

    フィンガープリント

    「Distribution, Density, and Structure of Muscle Spindles in the Vastus Intermedius and the Peroneus Longus Muscles of Sheep」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

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