On the Arterial Supply in the Human Flexor Hallucis Longus Muscle

DOI
  • SATO Yasushi
    First Department of Anatomy, Kyorin University School of Medicine
  • KAWASHIMA Tetsuo
    First Department of Anatomy, Kyorin University School of Medicine
  • TAKAFUJI Toyoharu
    First Department of Anatomy, Kyorin University School of Medicine
  • TAKEUCHI Ryuji
    First Department of Anatomy, Kyorin University School of Medicine
  • TOZAWA Takao
    First Department of Anatomy, Kyorin University School of Medicine
  • IGARASHI Jun
    First Department of Anatomy, Kyorin University School of Medicine
  • AZUMA Shogo
    First Department of Anatomy, Kyorin University School of Medicine
  • IKEYA Tomonori
    First Department of Anatomy, Kyorin University School of Medicine

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Other Title
  • ヒトの[足の]長母指屈筋の動脈分布について

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As a series of studies of the arterial supply in the human muscle in our laboratory, flexor hallucis longus muscle of ten Japanese adult bodies with twenty side cases are examined to explore the origin of nutrient arteries, the branching condition and the distribution area in this muscle in this paper. 1) The classification and the frequency of the distribution pattern of nutrient arteries. Type I: Only A. peronea (Pe), the branch-of A. tibialis posterior (Tp), is distributed and the common trunk (om) with R. flexor hallucis longus (Rfhl) which supplies this muscle and other muscles is existed (70.0%). Type II: The branch of A. tibialis posterior propria (Tpp, SATO. '84) is added to Type I (25.0%). Type III: The branch of A. tibialis posterior communis (Tpc, SATO. '84) is added to Type I (5.0%). 2) The distribution area of nutrient arteries is as follows. Type I: Pe(Rfhl) is 78.7% and Pe(om) 21.3%. Type II: Pe(Rfhl) is 70.1%, Pe(om) 24.9% and Tpp 5.0%. Type III: Pe (Rfhl) is 58.5%, Pe (om) 34.3% and Tpc 7.3%. 3) Total numbers of nutrient artery were counted from 9 to 22 and the highest frequency of its appearance was 12 (30.0%). 4) There is a case that the inserted tendon is not branched off and is inserted into the base of terminal phalanx of the great toe independently. It is very rarely observed among Japanese. 5) There are Type S and P; In the former the upper part of the inserted tendon comes out to the surface from the upper of muscular belly, while in the latter the inserted tendon exists inside the muscle bundles in the middle portion of muscular belly and then appears on the surface in the lower portion for the first time. Each type shows 30.0% and 70.0% in frequency, respectively. 6) The innervation of this muscle is divided into two branches of the tibial nerve; Rami superiores is distributed in the upper and the middle portion of muscle bundles, and Ramus inferior only in the lower portion of muscle bundles.

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