• PNF and Movement
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• 제17권3호
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• pp.369-378
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• 2019

Purpose: This study investigated the effects of virtual reality-based task training (VRBTT) using a smart glove on upper extremity function and activity of daily living in stroke patients. Methods: Twenty-nine patients with chronic stroke disease were randomly allocated to two groups: the VRBTT group (n=14) and the control group (n=15). All patients received 30 minutes of standard occupational therapy, 5 times a week, for 8 weeks. The VRBTT group performed an additional 30 minutes of virtual reality-based rehabilitation training, 5 times a week, for 8 weeks. Results: Both groups showed significant improvements in upper extremity function, yielding an increase in FMA and K-WMFT (p<0.05). There was a more significant increase in the VRBTT group before and after interventions (p<0.05). There was no significant difference in MAS for the control group (p>0.05); however, there was a significant increase for the VRBTT group (p<0.05). In the activities of daily living, there was a significant difference in the values for K-MBI (p<0.05). In addition, both groups showed a significant increase for K-MBI and K-RNLI (p<0.05). Conclusion: This study showed that VRBTT using smart gloves can have a more positive effect on upper extremity function and activities of daily living in stroke patients than conventional intervention methods. A variety of virtual reality-based contents and glove-shaped wearable devices will help stroke patients in rehabilitation clinics recover and return to society.

• PNF and Movement
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• 제17권2호
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• pp.199-206
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• 2019

Purpose: The purpose of this study was to evaluate the effects of a virtual upper extremity training program using the RAPAEL Smart Glove on upper extremity function in stroke survivors with chronic hemiparesis and to focus the training program development using the Smart Glove as a feasibility study. Methods: This study was conducted using a single group and pre-post test research design in the outpatient departments of local rehabilitation units. Ten chronic hemiparetic stroke survivors with a diagnosis of first stroke received therapeutic rehabilitation at the rehabilitation units. All the participants used a virtual reality program with the RAPAEL Smart Glove for 30 minutes per session 3 days a week over 8 weeks. They also received conventional occupational therapy with functional electrical stimulation for 40 minutes per session 3 days a week for 8 weeks as an additional therapy. To analyze the effects of this therapeutic intervention, four clinical measures, including the box-block test (BBT), the Wolf motor function test (WMFT), the trail-making score, the Jebsen Taylor hand function test (JTHFT), and grip strength, were used. Results: Upon completion of the intervention in week 8, all the participants demonstrated significant WMFT, JTT, BBT, grip strength, and trail-making score gains compared to the respective baselines at week 0. Conclusion: This study suggests that virtual upper extremity training using the RAPAEL Smart Glove has a reasonable and beneficial effects on upper extremity function in chronic hemiparetic stroke survivors.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 2005년도 ICCAS
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• pp.842-847
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• 2005

This paper proposes a novel real-time EMG pattern recognition for the control of a multifunction myoelectric hand from four channel EMG signals. To cope with the nonstationary signal property of the EMG, features are extracted by wavelet packet transform. For dimensionality reduction and nonlinear mapping of the features, we also propose a linear-nonlinear feature projection composed of PCA and SOFM. The dimensionality reduction by PCA simplifies the structure of the classifier, and reduces processing time for the pattern recognition. The nonlinear mapping by SOFM transforms the PCA-reduced features to a new feature space with high class separability. Finally a multilayer neural network is employed as the pattern classifier. We implement a real-time control system for a multifunction virtual hand. From experimental results, we show that all processes, including virtual hand control, are completed within 125 msec, and the proposed method is applicable to real-time myoelectric hand control without an operation time delay.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 2001년도 ICCAS
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• pp.181.6-181
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• 2001

This paper describes a development of rehabilitation training system for the postural balance control. A new rehabilitation training system, designated as a virtual cycling system, was developed to improve postural balance control by combining virtual reality technology with an unfixed bicycle. In this experiment, 20 normal adults were tested to investigate the influencing parameters of postural balance control. In order to evaluate the usefulness and the training effects of the system, several parameters including path deviation, cycling velocity, cycling time, center of pressure, and head movement were evaluated and analyzed quantitatively. Also, to improve the effect of balance training, the visual feedback information related to the subject's weight shift was assessed to identify whether it was useful. It could be also known ...

• 융합신호처리학회논문지
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• 제11권3호
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• pp.221-225
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• 2010

This paper presents the preliminary study of an interactive rehabilitation support system for both dementia patients and their caregivers, the goal of which is to improve the quality of life(QOL) of the patients suffering from dementia through virtual interaction. To achieve the virtual interaction, three kinds of recognition modules for speech, facial image and pen-mouse gesture are studied. The results of both practical tests and questionnaire surveys show that the proposed system had to be further improved, especially in both speech recognition and user interface for real-world applications. The surveys also revealed that the pen-mouse gesture recognition, as one of possible interactive aids, show us a probability to support weakness of speech recognition.

• 대한의용생체공학회:학술대회논문집
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• 대한의용생체공학회 1996년도 춘계학술대회
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• pp.256-259
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• 1996

In this paper, we proposed a new system for postural balance rehabilitation training. We used the cycle simulator using virtual reality technology as the sensory integration device. Our results showed that this system was effective postural balance rehabilitation training device and might be useful as the clinical equipment.

• 한국전문물리치료학회지
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• 제11권2호
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• pp.35-45
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• 2004

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.

• 재활치료과학
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• 제8권4호
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• pp.41-51
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• 2019

목적 : 본 예비 연구는 가상현실 기반의 일상생활활동 훈련이 외상성 뇌손상 환자의 일상생활활동 및 재활동기에 미치는 영향을 알아보고자 한다. 연구방법 : 본 연구는 7명의 외상성 뇌손상 환자를 대상으로 중재 전-후 설계를 수행하였다. 대상자들은 하루 30분, 주 2~3회, 4주간 가상현실 기반의 일상생활활동 훈련을 수행하였다. 중재 전과 후로 평가를 수행하였다. 측정은 수정바델지수, 기능적 독립척도(인지), 의지 설문지가 평가되었다. 중재 전과 후의 변화는 윌콕슨 부호순위 검정으로 분석하였고, 상관관계는 스피어만 상관분석을 이용하였다. 결과 : 중재 후, 외상성 뇌손상 환자는 한국판 수정바델지수에서 유의한 향상을 보였다(p<.05). 기능적 독립척도(인지)와 재활동기는 유의한 변화가 없었다(p>.05). 기능적 독립척도(인지)는 재활동기와 유의한 상관이 있었다(p<.05, r=.755). 기능적 독립척도(인지)의 사회인지영역은 재활동기와 유의한 상관이 있었다(p<.05, r=826). 결론 : 가상현실 기반의 일상생활활동 훈련은 일상생활활동 수행능력을 향상시킬 수 있으나, 사회인지와 재활동기의 개선여부가 가능한지에 대해서는 연구가 더 필요하다.

• 대한지역사회작업치료학회지
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• 제2권2호
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• pp.25-35
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• 2012

목적 : 본 연구는 가상현실 프로그램을 통해 뇌졸중 환자의 낙상 효능감과 일상생활활동에 미치는 영향을 알아보고자 하였다. 연구방법 : 뇌졸중 진단을 받은 환자를 대상으로 총 4주 동안 가상현실 프로그램 중재를 받는 실험군 10명과 작업치료 중재를 받는 대조군 10명으로 나누어 실시하였다. 치료 중재 전 후 낙상 효능감을 비교하기 위하여 낙상 효능감 척도(Fall Efficacy Scale: FES)를 시행하였고, 일상생활활동 수행능력을 비교하기 위하여 기능적 독립척도(Functional Independence Measure: FIM)를 시행하였다. 결과 : 실험군과 대조군의 치료 중재 전 후 뇌졸중 환자의 낙상 효능감과 일상생활활동 수행능력은 통계학적으로 유의한 차이를 보였고(p<.05), 실험군이 대조군에 비해 통계학적으로 유의하게 낙상 효능감과 일상생활활동 수행능력이 향상되었다(p<.05). 결론 : 작업치료와 더불어 가상현실 프로그램을 적용할 때 뇌졸중 환자의 낙상 효능감과 일상생활활동 수행능력을 향상시킨다는 것을 알 수 있었다. 따라서 가상현실 프로그램이 뇌졸중 환자의 낙상 효능감과 일상생활활동 수행능력을 위한 치료방법으로 작업치료와 더불어 임상에서 유용하게 적용될 수 있을 것이다.

• 한국산학기술학회논문지
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• 제21권8호
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• pp.537-545
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• 2020

본 연구는 회복기 단계에 있는 뇌혈관 질환자를 대상으로 가상현실 콘텐츠를 활용한 인지재활프로그램의 임상적 적용 효과를 알아보았다. 연구방법은 회복기 단계의 뇌혈관 질환자 34명을 대상으로 대조군(16명)과 실험군(18명)으로 나눈 후에 가상현실 콘텐츠 기반의 인지재활프로그램을 적용한 후, 인지기능과 일상생활활동 능력, 상지기능에서의 효과를 비교하고자 하였다. 대조군에는 보편적인 재활치료 프로그램을 실시하고, 실험군에서는 보편적인 재활치료 프로그램과 가상현실 콘텐츠 기반의 인지재활프로그램을 제공하였다. 두 집단 모두 하루 2회(1회 30분씩)씩, 주 5회, 4주간(총 20회기) 실시하였다. 중재 결과, 두 집단 모두 일상생활활동 능력이 모두 유의미하게 향상되었지만(p<.05), 실험군에서의 변화량이 대조군보다 5점정도 더 향상되었다(p<.05). 인지기능에서도 실험군과 대조군이 유의미한 차이를 보였고(p<.05), 변화량에서 실험군이 대조군보다 2점정도의 변화 수치를 보였다(p<.05). 상지기능에서는 대조군과 실험군 간의 유의마한 차이는 없었고(p>.05), 전후 변화량을 비교한 결과 실험군이 대조군보다 0.7점정도 유의미한 변화폭을 보였다(p<.05). 가상현실 콘텐츠를 활용한 인지재활프로그램이 일반적인 재활치료 프로그램에 비해서 일상생활활동 능력과 인지기능에서의 유의미한 향상 폭의 차이가 있다는 것을 확인하는 연구였다.