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태기식(K. S. Tae),김사엽(S. Y. Kim),송성재(S. J. Song),이지용(J. Y. Lee),이영희(Y. H. Lee),김영호(Y. H. Kim) 한국정밀공학회 2004 한국정밀공학회 학술발표대회 논문집 Vol.2004 No.10월
The purpose of this study was to investigate the characteristics between EMG timing of muscle contraction and motor impairment in chronic hemiplegic stroke patients. Delay time and co-contraction of 4 patients who had stroke less than 3 years were measured during isometric wrist flexion and extension along the 3 seconds beep signal. Onset and offset of muscle contraction were significantly delayed on the more affected sides than control sides. Offset was significantly delayed than the onset on the affected sides in wrist flexion. Also, recruitment of antagonist was larger than agonist on the affected sides. Co-contraction ratio on the affected side was significantly smaller than control sides in wrist flexion. In affected sides, Fugl-Meyer motor assessment(FMA) shows the correlation of onset delay in wrist flexion and extension. However, co-contraction ratio correlated with FMA in wrist flexion. EMG assessment is likely to be useful outcome measure and provide insights into mechanism for motor recovery in stroke patients.
대칭형 상지 운동기구를 이용한 손목 운동 시 뇌 활성도 패턴
태기식(K. S. Tae),김사엽(S. Y. Kim),송성재(S. J. Song),이소영(S. Y. Lee),박기영(G. Y. Park),손철호(C. H. Sohn),김영호(Y. H. Kim) 한국정밀공학회 2004 한국정밀공학회 학술발표대회 논문집 Vol.2004 No.10월
We developed a symmetrical upper limb motion trainer for chronic hemiparetic subjects. This trainer enabled the practice of a forearm pronation/supination and wrist flexion/extension. In this study, we have used functional magnetic resonance imaging(fMRI) with the developed symmetrical upper limb motion device, to compare brain activation patterns elicited by flexion/extension wrist movements of control and hemiparetic subject group. In control group, contralateral somatosensory cortex(SMC) and bilateral cerebellum were activated by dominant hand movement(Task 1), while bilateral movements by dominant hand(Task 2) activated the SMC in both cerebral hemispheres and ipsilateral cerebellum. However, in hemiparetic subject group, contralateral supplymentary motor area(SMA) was activated by unaffected hand movement(Task 1), while the activation of bilateral movements by unaffected hand(Task 2) showed only SMA in the undamaged hemisphere. This study, demonstrating the ability to accurately measure activation in both sensory and motor cortex, is currently being extended to patients in clinical applications such as the recovery of motor function after stroke.
자기주도적 요통 재활 훈련을 위한 관성 센서 기반의 게임 연동 시스템 개발
나선종(S. J. Na),장문석(M. S. Jang),박성준(S. J. Park),태기식(K. S. Tae),민홍기(H. K. Min),이응혁(E. H. Lee) 한국재활복지공학회 2018 한국재활복지공학회 학술대회논문집 Vol.2018 No.4
lumbar stabilization exercises reduces the stress applied to the spine, and the lumbar stabilization exercise to obtain the stability of the trunk exercise therapy. These are repetitive exercises, so if patient exercise for a long time, patient may feel bored. The purpose of this study is to develop a low back pain rehabilitation training system for self-directed rehabilitation of low back pain patients in cooperation with games so that patients can feel accomplishment and satisfied without feeling bored. In this study, patient data is collected through a complementary filter that performs lumbar stabilization with an inertial sensor. It was verified through experiments that the patient"s posture can be determined by converting the value into an angle, and stable and unstable posture can be distinguished.
보행 장애인을 위한 능동형 보행훈련 시스템 개발 및 평가
황성재,태기식,강성재,김정윤,황선홍,김한일,박시운,김영호,Hwang, S.J.,Tae, K.S.,Kang, S.J.,Kim, J.Y.,Hwang, S.H.,Kim, H.I.,Park, S.W.,Kim, Y.H. 대한의용생체공학회 2007 의공학회지 Vol.28 No.2
Modem concepts of gait rehabilitation after stroke favor a task-specific repetitive approach. In practice, the required physical effort of the therapists limits the realization of this approach. Therefore, a mechanized gait trainer enabling nonambulatory patients to have the repetitive practice of a gait-like movement without overstraining therapists was constructed. In this study, we developed an active gait training system for patients with gait disorder. This system provides joint movements to patients who cannot carry out an independent gait. It provides a normal stance-swing ratio of 60:40 using an eccentric configuration of two gears. Joint motions of the knee and the ankle were evaluated with using the 3D motion analysis system and compared with the results from the multi-body dynamics simulation. In addition, clinical investigations were also performed for low stroke patients during the 6-week gait training. Results from the dynamics simulation showed that joint movements of the knee and the ankle were affected by the gear size, the step length and the length of the foot plate, except the radius of curvature of the foot guide plate. Also, the 6-week gait training revealed relevant improvements of the gait ability in all low subjects. Functional ambulation category levels of subjects after training were 2 in three patients and 1 in a patient. The developed active gait trainer seems feasible as an adjunctive tool in gait rehabilitation after stroke.
이현주,이승주,태기식,Lee, H.J.,Lee, S.J.,Tae, K.S. 대한의용생체공학회 2010 의공학회지 Vol.31 No.2
The aim of this study was to evaluate effects of the balance ability on the heel height (flat, low heel[3cm], and high heel[7cm]) and high heeled habituation (group A is used to a low heeled shoes (<7cm) and group B is used to a high heeled shoes (${\geq}7cm$). Thirty-five subjects participated in this study. In this study, the static balance with opened eyes and closed eyes and dynamic balance were measured. Also functional reach test was tested. The results found that the static balance ability was the best in a 7cm heeled shoes with open eyes and closed eyes, but there was not significant difference between group A and Group B. Dynamic balance ability with walking velocity and cadence were significant difference between Group A and B. In the walking velocity, a flat was the fastest, followed by 7cm heel and 3cm heel with Group A while 3cm and 7cm, then a flat with Group B. Also Cadence pattern was similar. Functional balance ability was the highest with a flat, but it was not difference significantly between Group A and B. Therefore, this study demonstrated that the habituation to the high heel altered gait velocity and cadence of dynamic balance ability.