The Journal of Korean Physical Therapy

The Korean Society of Physical Therapy (대한물리치료학회)
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The Effects of Foot and Knee Position on Electromyographic Activity of the Vastus Medialis and Vastus Lateralis for Hemiplegic Patients

발과 무릎관절 위치가 편마비 환자의 안쪽넓은근과 가쪽넓은근 근활성도에 미치는 영향

  • Jang, Jun-Hyeok (Department of Rehabilitation Science, Graduate School, Daegu University) ;
  • Kim, Kyung-Hwan (Department of Rehabilitation Science, Graduate School, Daegu University) ;
  • Kim, Tae-Ho (Department of Physical Therapy, Daegu Health College) ;
  • Han, Dong-Wook (Department of Physical Therapy, College of Medical and Life Science, Silla University)
  • 장준혁 (대구대학교 대학원 재활과학과) ;
  • 김경환 (대구대학교 대학원 재활과학과) ;
  • 김태호 (대구보건대학 물리치료과) ;
  • 한동욱 (신라대학교 물리치료학과)
  • Received : 2010.01.15
  • Accepted : 2010.06.03
  • Published : 2010.08.25
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Abstract

Purpose: The purpose of this study was to evaluate the electromyographic (EMG) activity of vastus medialis oblique (VMO) and vastus lateralis (VL) muscles on foot position and knee angle for hemiplegia patients. Methods: Ten stroke subjects (10 males) participated in the study. Subjects were all right-hemiplegic patients. All subjects did $0^{\circ},\;20^{\circ}$ and $40^{\circ}$ knee flexion while maintaining the foot in a neutral position, or at $30^{\circ}$ adduction or at $30^{\circ}$ abduction. Surface EMG data were collected for VMO and VL muscles on the non-hemiplegic side and hemiplegic side. Collected data were analyzed using two-way ANOVA. Results: VMO and VL activities for the non-hemiplegic and the hemiplegic sides were highest for $40^{\circ}$ knee flexion while maintaining the three foot positions. There were no significant differences in EMG activity of the VMO and VL muscles with different foot positions. There were significant differences between VMO and VL activity for knee flexion angle while maintaining the foot in neutral (p<0.05), at $30^{\circ}$ adduction (p<0.05), or at $30^{\circ}$ abduction (p<0.05). Conclusion: Foot position does not influence VMO and VL activities. But, knee flexion exercise in a closed chain can increase VMO and VL muscle activity for hemiplegic patients. In particular, VMO and VL activities for both the non-hemi side and the hemi side were highest for $40^{\circ}$ knee flexion.

Keywords

References

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