The Journal of Korean Physical Therapy

The Korean Society of Physical Therapy (대한물리치료학회)
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The effect of Electromyographic activity of knee extensor during contralateral hip isometric adduction

반대측 고관절의 등척성 내전운동이 대퇴사두근의 등척성수축 근전도 활성도에 미치는 영향

  • Lee Yun-seob (Department of Rehabilitation Science graduate school, Taegu University) ;
  • Sim Young-heon (Department of physical therapy, samsung medical center) ;
  • Lim Chang-hun (Department of Rehabilitation Science graduate school, Taegu University) ;
  • Kim Myung-cheol (Department of Rehabilitation Science graduate school, Taegu University) ;
  • Sin Hyung-soo (Department of Rehabilitation Science graduate school, Taegu University) ;
  • Park Eun-se (Department of Rehabilitation Science graduate school, Taegu University) ;
  • Kim Jin-sang (Department of Physical Therapy of Rehabilitation Science, Taegu University)
  • 이윤섭 (대구대학교 대학원 재활과학과) ;
  • 심영헌 (삼성서울병원 물리치료실) ;
  • 임창훈 (대구대학교 대학원 재활과학과) ;
  • 김명철 (대구대학교 대학원 재활과학과) ;
  • 신형수 (대구대학교 대학원 재활과학과) ;
  • 박은세 (대구대학교 대학원 재활과학과) ;
  • 김진상 (대구대학교 재활과학대학 물리치료학과)
  • Published : 2005.06.01
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Abstract

This study was deigned to identify the effect of electromyographic activity of knee extensor during contralateral hip isometric adduction. six young adults who had not experienced any knee injuries were recruited. Their Q-angles were within a normal rage. They were asked to sit on the table. The EMG activities of the vastus lateralis (VL), vastus medialis oblique (VMO) were recorded in sitting by surface electrodes and normalized by MVC EMG values derived from manual muscle test. The EMG activity levels of the VL, RF, and VMO were the highest when foot was externally rotated. The EMG activity level of VMO/VL ratio did show significant differences(p<.05). The onset time of vastus lateralis (VL) and vastus medialis oblique (VMO) was similar in contralateral hip isometric adduction(p<.05).

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