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지지면의 수평 진동에 대한 동적 자세응답 특성에 관한 연구
오가영(G. Y. Oh),유미(M. Yu),박용군(Y. J. Piao),김경(K. Kim),고명환(M. H. Ko),권대규(T. K. Kwon) 한국재활복지공학회 2010 한국재활복지공학회 학술대회논문집 Vol.2010 No.11
This paper investigated the effects of dynamic postural response for maintaining upright standing on a support surface during horizontal vibration in anterior-posterior and medial-lateral direction. Seven healthy young subjects participated in this study. Postural control was analyzed by the measurement of COP (center of pressure) sway. Three different frequencies and two different amplitudes of support surface were employed: O.6Hz, 102Hz, 1.8Hz and 204Hz at 1cm, 3cm. The experiments were performed dynamic postural reponses at the condition of eye open and close. The electrornyographic signals of the four muscles in lower extremities were recorded and analyzed in the frequency domain: the muscles of interest were rectus femoris (RF), biceps femoris (BF), gastrocnemius (Ga), tibialis anterior (T A). The experimental results showed the difference of muscular activities at the different frequencies, amplitudes and the vibration directions of the support surface. For the anterior-posterior and medial-lateral direction, the Ga showed highest activities. Also, the rate of the increase in the muscular activities was affected by the frequency and amplitude. This paper could be applied to the dynamic postural training for the elderly and the rehabilitation training for the patients to improving the ability of postural control.
동력 장하지보조기를 이용한 보행운동 재활훈련 시스템 개발에 관한 기초 연구
김경(K. Kim),기영술(Y. S. Ki),정구영(G. Y. Jeong),고명환(M. H. Ko),권대규(T. K. Kwon) 한국재활복지공학회 2010 한국재활복지공학회 학술대회논문집 Vol.2010 No.11
The purpose of this study was to test the effectiveness of a prototype hip-knee-ankle-foot orthosis (HKAFO) powered by two artificial pneumatic muscles during walking. Subjects walked on treadmill at 1.5 krn/h under four conditions without extensive practice: 1) without wearing HKAFO, 2) wearing HKAFO with artificial muscles turned off, and 3) wearing HKAFO powered only in plantaflexion under feedforward control. The experimental result showed that a muscular strength of wearing HKAFO powered plantarflexion under control was measured to be lower due to pneumatic assistance and foot pressure of wearing HKAFO powered plantarflexion under control was measured to be greater due to power assistance.