Superficial Fibers from the Supraspinatus Tendon to the Infraspinatus Tendon

DOI
  • YOSHIMURA Hideya
    Division of Orthopedic Surgery, Oume Municipal General Hospital
  • MOCHIZUKI Tomoyuki
    Section of Cartilage Regeneration, Graduate School, Tokyo Medical and Dental University
  • ARAI Ryuuzo
    Funabashi Orthopaedic Sports Medicine Center
  • SUGAYA Hiroyuki
    Funabashi Orthopaedic Sports Medicine Center
  • NIMURA Akimoto
    Section of Orthopedic Surgery, Graduate School, Tokyo Medical and Dental University
  • MUNETA Takeshi
    Section of Orthopedic Surgery, Graduate School, Tokyo Medical and Dental University
  • AKITA Keiichi
    Unit of Clinical Anatomy, Graduate School, Tokyo Medical and Dental University

Bibliographic Information

Other Title
  • 棘上筋から棘下筋に向かう表層線維の研究

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Description

In the process of investigating the structure of the rotator cuff, the superficial fibers, which originated from the supraspinatus tendon and ran to the greater tuberosity beyond the infrasupinatus tendon, were observed in many specimens without rotator cuff tear. On the other hand, in the specimens with rotator cuff tears, thicker fibrous bundles, running from the supraspinatus to the posterior portion of the greater tuberosity along the posterior margin of the torn area, were observed. Thus we suspected that the superficial fibers from the supraspinatus prevent the posterior enlargement of the torn lesion and investigated the frequency and pattern of the superficial fibers. 82 shoulders of 41 adult cadavers were used in the present study. After resection of the acromion, we removed the coracohumeral ligament meticulously. In 70 specimens without rotator cuff tears, we researched the frequency and pattern of the superficial fibers of the supraspinatus tendon. In 12 specimens with rotator cuff tears, we investigated the relationship between the torn lesion and the superficial fibers. In 62 of 70 specimens without rotator cuff tear, the superficial fibers from the supraspinatus tendon running from the tendon proper to the greater tuberosity were seen. There were various patterns of attachments to the infrasupinatus tendon in those superficial fibers. In 7 specimens, those had a torn lesion located at the anterior portion of the greater tuberosity, the thick superficial fibrous bundle was observed on the posterior margin of the torn lesion. In the rest 5 specimens with a large or massive tear, we could not find the similar fibrous bundles on the posterior margin of the torn area. These results suggest that the superficial fibers from the supraspinatus tendon might prevent the posterior enlargement of the rotator cuff tears.

Journal

  • Katakansetsu

    Katakansetsu 32 (3), 501-503, 2008

    Japan Shoulder Society

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