肩関節内旋, 外旋における等尺性収縮時の肩甲骨周囲筋活動 The Activities of the Scapular Muscles during Isometric Contraction of Internal and External Shoulder Rotation

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著者

    • 鈴木 俊明 SUZUKI TOSHIAKI
    • 関西医療大学保健医療学部 臨床理学療法学教室 Clinical Physical therapy Laboratory, Faculty of Health Sciences, Kansai University of Health Sciences

抄録

〔目的〕肩甲骨の安定をもたらすメカニズムを分析するために,等尺性収縮時の肩甲骨周囲筋活動を測定した.〔方法〕肩関節第1,第2肢位における内旋,外旋等尺性収縮時の肩甲骨周囲筋活動を3種類の負荷を与えて測定した.肩甲骨周囲筋を動作筋,拮抗筋に分類し,活動の変化を調べた.〔結果〕第1,第2肢位の内外旋共に,負荷量増加に伴い動作筋,拮抗筋の筋電図積分値相対値は有意に増加した.最も強い負荷の場合,第1肢位では動作筋は開始肢位の14から24倍,拮抗筋は3から5倍となった.第2肢位では動作筋は2から12倍,拮抗筋は2から7倍となった.〔結語〕等尺性収縮時には動作筋,拮抗筋両者の活動が生じる必要がある.過去の研究と併せて考えると,動作筋は外的負荷に抗し,拮抗筋は肩甲骨や体幹の安定に関与している可能性がある.

[Purpose] The activities of the scapular muscles during isometric contraction were measured to examine the mechanism of scapular stability. [Method] The activities of the scapular muscles were measured during isometric contraction of internal and external shoulder rotation at 0 degrees and 90 degrees abduction with three kinds of resistance loads. Scapular muscles were classified into agonists and antagonists of each motion, and the changes in each muscle activity were analyzed. [Results] The integrated electromyograms of both agonists and antagonists increased significantly with increasing resistance load in internal and external rotation at 0 degrees and 90 degrees abduction. In the case of the strongest resistance load at 0 degrees abduction, the integrated electromyograms of the agonists showed from 14 to 24 times as much as the start position and those of antagonist showed from 3 to 5 times that of the start position. At 90 degrees abduction, the integrated electromyograms of agonists showed from 2 to 12 times and those of antagonists showed from 2 to 7 times. [Conclusions] All scapular muscles needed to be active during concentric contraction of shoulder rotation. We consider that the agonists might work against external force and the antagonists might contribute to the stability of the scapula and trunk, in light of a previous study.

収録刊行物

  • 理学療法科学

    理学療法科学 27(2), 141-146, 2012-04-20

    理学療法科学学会

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各種コード

  • NII論文ID(NAID)
    10030767191
  • NII書誌ID(NCID)
    AN10472896
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    13411667
  • NDL 記事登録ID
    023782739
  • NDL 請求記号
    Z7-1893
  • データ提供元
    CJP書誌  NDL  J-STAGE 
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