견관절 외전 각도에 따른 중간 및 하부 승모근의 근 활성도 비교

A Comparison of EMG Activity for Middle and Lower Trapezius Muscle According to Shoulder Abduction Angles

  • 이원휘 (연세대학교 대학원 재활학과) ;
  • 하성민 (연세대학교 대학원 재활학과) ;
  • 박규남 (연세대학교 대학원 재활학과) ;
  • 김수정 (연세대학교 대학원 재활학과) ;
  • 원종혁 (연세대학교 원주의과대학 원주기독병원 재활의학과) ;
  • 최흥식 (한서대학교 물리치료학과)
  • Lee, Won-Hwee (Dept. of Rehabilitation Therapy, The Graduate School, Yonsei University) ;
  • Ha, Sung-Min (Dept. of Rehabilitation Therapy, The Graduate School, Yonsei University) ;
  • Park, Kyue-Nam (Dept. of Rehabilitation Therapy, The Graduate School, Yonsei University) ;
  • Kim, Su-Jung (Dept. of Rehabilitation Therapy, The Graduate School, Yonsei University) ;
  • Weon, Jong-Hyuk (Dept. of Rehabilitation Medicine, Wonju Christian Hospital, Yonsei University) ;
  • Choi, Houng-Sik (Dept. of Physical Therapy, Hanseo University)
  • 투고 : 2011.01.09
  • 심사 : 2011.02.05
  • 발행 : 2011.02.19

초록

The purpose of this study was to compare electromyography (EMG) activity for the middle and lower trapezius muscle according to various shoulder abduction angles. Thirty healthy male subjects were recruited for this study. Each subject performed three repetitions of horizontal abduction at $75^{\circ}$, $90^{\circ}$, $125^{\circ}$, $160^{\circ}$, and $180^{\circ}$ of shoulder abduction angle in a prone position. Surface EMG activity was recorded from the middle and lower trapezius while the subjects held for five seconds at a predetermined position. The EMG activity was normalized using the maximal voluntary isometric contraction (MVIC) elicited using a manual muscle testing technique. A repeatedly measured ANOVA was performed by Bonferroni's post hoc test. The EMG activity of the middle and lower trapezius was significantly different among shoulder abduction angles (p<.05). The greatest level of muscle activity for the middle and lower trapezius were demonstrated at $90^{\circ}$ and $160^{\circ}$ of shoulder abduction angle, respectively. These results suggest that middle and lower trapezius strengthening exercise and manual muscle testing should be performed at different shoulder abduction angles.

키워드

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