• The Journal of Korean Physical Therapy
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• 제33권2호
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• pp.91-96
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• 2021

Purpose: This study investigated the effects of cryotherapy on the ankle joint muscle strength and balance ability in stroke patients with ankle joint muscles. Methods: In this study, 20 patients with chronic stroke were recruited from a rehabilitation hospital. The patients were divided into two groups: a cryotherapy group (10 patients) and a control group (10 patients). The cryotherapy group performed sit-to-stand training for 15 minutes and then cryotherapy for the minutes. In the control group, after sit-to-stand training for 15 minutes, blocked cryotherapy was provided for three minutes. In both groups, the interventions were provided five times a week for three weeks. The strength of the ankle joint muscles was measured before and after the training using the Biodex systems 3. The static balance ability was measured using balancia software, and the dynamic balance ability was measured by performing the sit-to-stand test (FTSST) five times. Results: After the training periods, the cryotherapy group showed significant improvement in the ankle dorsiflexor strength, ankle plantarflexor strength, weight distribution of the affected side, and FTSST compared to the control group (p<0.05). Conclusion: Based on these results, cryotherapy could be considered an effective method to improve the strength of ankle joint muscles. Cryotherapy improves muscle strength as it increases the motor neuron excitability. Therefore, cryotherapy may be considered to improve the strength of the ankle joint muscles of stroke patients.

• 말소리와 음성과학
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• 제13권2호
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• pp.77-90
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• 2021

본 연구는 국외에서 개발된 비단어 중재접근법을 수정 및 보완하여 한국어 비단어 중재접근법을 확립하고, 아동기 말실행증 아동에게 직접 적용하여 그 효과를 확인하기 위해 실시되었다. 궁극적인 목적은 비단어를 이용한 중재가 아동기 말실행증의 말운동프로그래밍 능력을 개선시켜 비단어 산출 및 단어로의 일반화에 효과적인지 알아보기 위함에 있다. 중재는 아동기 말실행증의 진단 특성을 보이는 5세 6개월의 남아를 대상으로, ABA설계를 사용한 단일대상연구를 실시하였다. 중재에 사용된 비단어는 아동 맞춤형으로 제작하였으며, 한 회기당 60분씩 주 2회로, 총 12회기를 실시하였다. 그 결과 중재한 3음절 비단어의 모든 지표가 향상되었으며, 중재하지 않은 3음절, 4음절 비단어 및 단어로의 일반화를 확인하였다. 단, 단어로의 일반화 효과는 비단어로의 일반화 효과에 비해 미비하였다. 비단어 중재는 대상 아동의 말운동프로그래밍 능력을 개선시키는데 효과적이었다. 그 결과 운동프로그래밍 손상에 기인한 전환 오류가 크게 감소하였고, 중재하지 않은 비단어의 산출 능력이 큰 폭으로 증가하였다. 그러나 강력하게 습관화된 단어 오류를 완전히 개선시키는 데에는 한계가 있었으며, 이는 보다 집중적이고 반복적인 중재 일정을 제공했을 때 기대할 수 있는 결과일 것이다.

• 한국콘텐츠학회논문지
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• 제11권4호
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• pp.290-302
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• 2011

이번 연구의 목적은 전정 중심의 감각통합치료가 발달장애아동의 안구진탕, 시지각, 균형능력에 미치는영향을 알아보기 위해서이다. 발달장애를 가진 23명의 아동이 이번 실험에 참여하였다. 대상은 12주동안 Ayres의 감각통합이론에 바탕을 둔 전정중심의 감각통합치료를 받았다. 치료 효과는 SCPNT, DTVP-2, P-CTSIB, SCSIT등과 BOT의 일부 평가항목을 사용하였다. 수집된 데이터는 Wilcoxon test를 사용하여 분석되었다. 연구결과는 회전후 안구진탕 측정에서 유의한 증가를 보였다. 시지각과 균형능력의 측정결과에서도 유의한 증가를 나타내었다. 따라서 전정중심의 감각통합치료가 발달장애를 가진 아동에서 안진, 시지각, 균형능력의 증진에 효과적이었다.

• 대한간호학회지
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• 제33권5호
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• pp.591-600
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• 2003

Purpose: The purpose of this study was to investigate the effects of exercise training using biofeedback and constraint-induced movement on the upper extremity function of hemiplegic patients. Method: A non-equivalent pretest-posttest design was used. Study subjects were a conveniently selected group of 40 hemiplegic patients(20 experimental subjects, 20 control subjects) who have been enrolled in two community health centers. After biofeedback training the subjects of experimental group were given constraint-induced movement, involving restraint of unaffected U/E in a sling for about 6 hours in a day over a period of two weeks, while at the same time intensively training the affected U/E. Outcomes were evaluated on the basis of the VIE motor ability(hand function, grip power, pinch power, U/E ROMs), and motor activity(amount, quality). Result: 1. After 2 weeks of treatment, the motor abilities of affected U/E(hand function, grip power, pinch power, ROMs of wrist flexion, elbow flexion and shoulder flexion/extension) were significantly higher in subjects who participated in exercise training than in subjects in the control group with no decrement at 4-week follow-up. However, there was no significant difference in wrist extension between experimental or control group. 2. After 2 weeks of treatment, the amount of use and the quality of motor activity of affected U/E were significantly higher in subjects who participated in exercise training than in subjects in the control group with no decrement at 4-week follow-up. Conclusion: The above results state that exercise training using biofeedback and constraint-induced movement could be an effective intervention for improving U/E function of chronic hemiplegic patients. Long-term studies are needed to determine the lasting effects of constraint-induced movement.

• 성인간호학회지
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• 제16권4호
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• pp.626-635
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• 2004

Purpose: The purpose of this study was to explain the effects of upper extremity exercise program on hemiplegic stroke patients. Method: The research was designed by a non-equivalent pretest-posttest way. The data were collected from February to August 2003 at a community health center located in Seoul. The study subjects were a conveniently selected group of 27 hemiplegic patients. The subjects were divided into two groups, the experimental group and the control group. 14 subjects were assigned to the experimental group in which the subjects did the upper extremity exercise training for 2 hours once a week during four weeks, while 13 subjects were assigned to the control group. The outcomes were evaluated on the basis of the upper extremity motor ability(hand power, pinch power, upper extremity ROMs), amount of motor use and the degree of depression. Result: 1. After treatment, the motor abilities of the affected upper extremity(hand power, pinch power, ROMs of wrist flexion/extension, shoulder extension) were significantly different between the two groups. However, there were no significant differences in elbow and shoulder flexion between experimental and control group. 2. After treatment, amount of motor use of affected upper extremity were significantly different between the two groups. 3. After treatment, the degree of depression were significantly different between the two groups. Conclusion: In considering these results, the upper extremity exercise program could be effective for hemiplegic patients by improving the function of their upper extremity. Long-term studies are needed to determine the effects of upper extremity exercise program.

• 한국전문물리치료학회지
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• 제23권4호
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• pp.16-26
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• 2016

Background: Deficiencies in the ability to maintain balance are common in elderly. Augmented feedback such as knowledge of results (KR) can accelerate learning and mastering a motor skill in older people. Objects: We designed this study to examine whether one session of Wii-Fit game with self-regulated KR is effective for elderly people, and to compare the effect of two different timings of self-regulated KR conditions. Methods: Thirty-nine community-dwelling elders, not living in hospice care or a nursing home, participated in this study. During acquisition, two groups of volunteers were trained in 10 blocks of a dynamic balancing task under the following 2 conditions, respectively: (a) a pre-trial self-regulated KR ($n_1=18$), or (b) a post-trial self-regulated KR ($n_2=21$). Immediate retention tests and delayed retention tests of balancing performance were administered in 15 minutes and 24 hours following acquisition period, respectively. Results: In both groups, significant improvements of balancing performances scores were observed during the acquisition period. Regardless of the group, mean of balancing performance scores on retention tests were well-maintained from the final session. There were no significant differences between groups in balancing performance scores during the acquisition period (p>.05); however, the post-trial self-regulated KR group exhibited significantly higher balancing performance scores in both the immediate retention test and delayed retention test than that of the pre-trial self-regulated KR group (p<.05). Conclusion: Therefore, subjects who regulated their feedback after a dynamic balancing task, during the acquisition period, experienced more efficient motor learning during the retention period than did subjects who regulated their feedback before a dynamic balancing task. Accordingly, in case of presenting the KR of motor learning in clinical settings to elders who reduced dynamic balance abilities, the requesting time of KR is imperative according to self-estimation processes as well as types of KR and practice.

• 한국전자통신학회논문지
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• 제11권10호
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• pp.955-962
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• 2016

본 논문은 BLDC 전동기의 정밀한 속도제어를 위하여 외란 관측기의 설계 및 영향을 제거하는 제어기 설계방법을 제안한다. BLDC 전동기의 외부에서 회전축에 작용하는 부하의 변동과 전기적인 시스템에서 발생하는 역기전력을 외란으로 가정하고, 외란은 구간에 대한 상수로 가정하여 루엔버거 관측기를 설계한다. 시스템 상태에 대한 관측기의 오차가 0으로 수렴할 수 있도록 적절한 이득을 설정하는 방법을 보이고, 추종성능을 향상시킬 수 있는 적절한 PI제어기의 이득을 설정하기 위한 방법을 제시한다. 제안된 제어기를 120W급의 BLDC 전동기에 적용하여 속도 그리고 전류 레퍼런스를 추종하는 능력을 시뮬레이션 시험하였다. 상수부하의 변동을 외란으로 적용하였고, 그 결과 설계된 제어기의 정상상태 오차가 0.1 [%] 이내를 가짐으로 상태 추종성능에 대해 유용한 제어기임을 보일 수 있었다.

• 한국조명전기설비학회지:조명전기설비
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• 제9권3호
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• pp.88-96
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• 1995

고속 엘리베이터는 높은 안정성과 제어성이 필요하므로 기동, 정지시에 영 속도를 포함한 정밀 구동이 필요하다. 유도전동기의 정밀 구동을 위하여 사용되어온 벡터 제어 기법은 슬립 주파수 제어에 의한 간접 벡터 제어와 계자편향에 의한 직접벡터 제어의 두가지 종류로 분류할 수 있으며, 직접벡터제어의 경우 전동기 제어 변수의 변화에 강건한 반면에 직접 벡터 제어의 경우 비교적 넓은 속도구간에서 제어가 가능하다는 장점을 가지고 있다. 본 논문에서 토크는 직접 벡터기반으로 제어하고, 지속은 간접 벡터 기반으로 제어함으로써 유도전동기의 과도상태 동작과 시동시 영 속도 부근 및 저속 영역에서의 동작이 보다 강건하도록 개선된 직접토크-간접자속(DTIF, Direct Torque Indirect Flux)제어기를 제시하였다. 3상 유도전동기의 구동을 위하여 제안된 시스템의 수행결과는 시뮬레이션과 실험을 통하여 입증하였으며, 영 속도부근과 저속에서 고속으로의 변환과정은 속도응답에 대한 상전압, 상전류 그리고 DC링크 전류를 비교 측정하여 안정하고 강건한 속도변화가 이루어짐을 확인 할 수 있었다.

• The Journal of Korean Physical Therapy
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• 제25권3호
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• pp.126-131
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• 2013

This case report described a single case of adult stoke patient due to Moyamoya disease through long-term follow-up observation, which included his demographics, brain images, and change of motor function and functional activities. The subject was the 54-year-old male diagnosed with left hemiparesis from a stroke due to multifocal encephalomalacia in both hemispheres. At the time of the stroke attack, he took brain surgery intervention including external ventricular drain. Physical and occupational therapy for stroke rehabilitation were admitted including muscle strengthening exercises, functional activity/ADL training, neurofacilitative techniques with bobath or proprioceptive neuromuscular facilitation concepts, and compensatory strategy. Patient's MRI showed that right frontal lobe, right peri-ventricular area, left parietal, and left occipital lobes were damaged, and MRA showed that abnormal collateral vessel was richly developed in both hemispheres by occlusion of proximal internal carotid arteries in both sides. His motor strength was improved from poor to good grade in all of upper and lower limb motions, that MBC was improved from stage 1 to stage 5. In FAC and barthel index, at the initial evaluation, he could not perform any functional movement, but his FAC and barthel index were on 3 and 14 points at present, respectively. During long-term follow-up for approximately 4 years, the subject's functional motor ability was improved, as similar with recovery progression of usual stroke patient. We believe that this single case report will provide clinical information and concern regarding Moyamoya disease with physical therapist, in terms of such as epidemiology, pathogenesis, diagnostic procedures, clinical features, recovery process, and prognosis.

• Asian Spine Journal
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• 제12권6호
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• pp.998-1009
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• 2018

Study Design: Olfactory ensheathing cells (OECs) from rat olfactory mucosa were cultured, characterized, and transplanted into a rat model of spinal cord injury (SCI). Purpose: To evaluate different doses of OECs in a rat model of SCI. Overview of Literature: SCI causes permanent functional deficit because the central nervous system lacks the ability to perform spontaneous repair. Cell therapy strategies are being explored globally. The clinical use of human embryonic stem cell is hampered by ethical controversies. Alternatively, OECs are a promising cell source for neurotransplantation. This study aimed to evaluate the efficacy of different doses of allogenic OEC transplantation in a rat model of SCI. Methods: OECs were cultured from the olfactory mucosa of Albino Wistar rats; these cells were characterized using immunohistochemistry and flow cytometry. Rats were divided into five groups (n=6 rats each). In each group, different dosage ($2{\times}10^5$, $5{\times}10^5$, $10{\times}10^5$, and >$10{\times}10^5$) of cultured cells were transplanted into experimentally injured spinal cords of rat models. However, in the SCI group, only DMEM (Dulbecco's modified Eagle's medium) was injected. Rats were followed up upto 8 weeks post-transplantation. The outcome of transplantation was assessed using the Basso, Beattie, Bresnahan (BBB) scale; motor-evoked potential studies; and histological examination. Results: Cultured cells expressed 41% of p75NTR, a marker for OEC, and 35% of anti-fibronectin, a marker for olfactory nerve fibroblast. These cells also expressed $S100{\beta}$ and glial fibrillary acid protein of approximately 75% and 83%, respectively. All the transplanted groups showed promising BBB scores for hind-limb motor recovery compared with the SCI group (p<0.05). A motor-evoked potential study showed increased amplitude in all the treated groups compared with the SCI. Green fluorescent protein-labeled cells survived in the injured cord, suggesting their role in the transplantation-mediated repair. Transplantation of $5{\times}10^5$ cells showed the best motor outcomes among all the doses. Conclusions: OECs demonstrated a therapeutic effect in rat models with the potential for future clinical applications.