Physical Therapy Korea (한국전문물리치료학회지)

Korean Research Society of Physical Therapy (한국전문물리치료학회)
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Electromyographic Activities of Lower Leg Muscles During Static Balance Control in Normal Adults

정상성인에서 정적 균형 제어 시 다양한 조건에 따른 하퇴 근육 활성도의 특성

  • Woo, Young-Keun (Dep. of Physical Medicine and Rehabilitation, Samsung Medical Center & Center for Clinical Medicine) ;
  • Park, Ji-Won (Dep. of Physical Medicine and Rehabilitation, Samsung Medical Center & Center for Clinical Medicine) ;
  • Choi, Jong-Duk (Dept. of Rehabilitation Therapy, The Graduate School, Yonsei University) ;
  • Hwang, Ji-Hye (Dep. of Physical Medicine and Rehabilitation, Samsung Medical Center & Center for Clinical Medicine, Sungkyunkwan University School of Medicine) ;
  • Kim, Yun-Hee (Dep. of Physical Medicine and Rehabilitation, Samsung Medical Center & Center for Clinical Medicine, Sungkyunkwan University School of Medicine)
  • 우영근 (삼성서울병원 임상의학연구소) ;
  • 박지원 (삼성서울병원 임상의학연구소) ;
  • 최종덕 (연세대학교 대학원 재활학과) ;
  • 황지혜 (성균관의대 삼성서울병원 재활의학교실) ;
  • 김연희 (성균관의대 삼성서울병원 재활의학교실)
  • Published : 2004.05.21
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Abstract

The purpose of this study was to investigate the correlation and characteristics between electromyographic (EMG) activities of lower leg muscles and the posturographic assessment of static balance control in normal adults. Twenty-four young, healthy adults(12 males, 12 females) participated in the study. Center of pressure (COP) parameters were obtained using force platform as total path distance, total sway area, X mean frequency and Y mean frequency for 20 seconds in the following conditions: (1) comfortable standing with eyes opened or closed, (2) uncomfortable standing (feet together) with eyes opened or closed, (3) virtual moving surround delivered using Head mount display (HMD) with four different moving patterns. The virtual moving patterns consisted of close-far, superior-inferior tilting (pitch), right-left tilting (roll), and horizontal rotation (yaw) movements. Surface electromyographic activites were recorded on the tibialis anterior, peroneus longus, medial and lateral heads of gastrocnemius muscles under each condition. Correlation between the posturographic measures and EMG activities were evaluated. Total path distance and total sway area of COP were significantly increased during uncomfortable standing. EMG activity of tibialis anterior was significantly more during uncomfortable standing and virtual moving surround stimulation than during comfortable standing. Total path distance and sway area of COP during comfortable standing with closed eyes showed significant positive correlation with the EMG activities of the lateral head of gastrocnemius muscle. Total path distances and total sway area of COP during muscle. Total path distances and total sway area of COP during presentation of virtual moving surround also had significant positive correlations with EMG activities of the lateral head of gastrocnemius muscle under close-far movement.

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