대한인간공학회지 (Journal of the Ergonomics Society of Korea)

  • 제22권4호
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  • Pages.47-57
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  • 2003
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  • 1229-1684(pISSN)
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  • 2093-8462(eISSN)
대한인간공학회 (Ergonomics Society of Korea)
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자의적 등척성 작업에서 몸통 근육의 기능적 발휘 형태 분석

Analysis of functional roles of ten trunk muscles in voluntary isometric exertion tasks

  • 송영웅 (포항공과대학교 산업공학과) ;
  • 정민근 (포항공과대학교 산업공학과)
  • 발행 : 2003.11.30
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초록

This study investigated the recruitment patterns of ten trunk muscles in isometric exertion tasks, focused on the functional roles (agonist or antagonist). Twelve male students performed maximum voluntary isometric exertion tasks towards six directions: flexion/extension, left/right lateral bending, and clockwise/counter-clockwise twisting. EMG signals from ten trunk muscles and exertion forces were collected. Normalized EMG (NEMG) values were calculated at 10, 20, 30, 40, 50, 60, 70, 80, and 90 %MVC. The subjects showed a limited capacity in producing twisting moments, approximately 50% of the extension moment, and 70% of lateral bending moments. EMG activity was dependent on the direction and magnitude of the exertion, and also on the functional role. The mean NEMG of agonist was 0.260 and 0.067 for antagonist. Agonists showed the highest mean NEMG in flexion (0.367), while antagonists showed the highest mean NEMG in twisting clockwise/counter-clockwise (0.090/0.106).

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참고문헌

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