• 국제물리치료학회지
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• 제11권2호
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• pp.2021-2027
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• 2020

Background: Previous robot-mediated gait training has been proven several limitations such as pointless repeated motion training, decreased presence, etc. In this research, adult stroke patients were participated in robot-mediated gait training accompanied with or without virtual reality program. Objectives: Exploring whether the results indicated virtual reality system has contribution to muscle strength and balance ability. Design: A case series research, cross-over trial. Methods: Eleven participants (male 4, female 7) with adults diagnosed as stroke from medical doctor ware engaged. The participants received 2 treatment sessions of identical duration, robot-assisted gait training with virtual reality and robot-assisted gait training with screen-off randomly crossed over include 1-day for each person of wash-out period. The parameter was muscle activity, the researchers assessed sEMG (surface electromyography). Results: The result showed less muscle activities during training in robot-assisted gait training with virtual reality circumstances, and these indicated muscles were gluteus medius muscle, vastus medialis muscle, vastus intermedius and vastus lateralis muscle, semimembranosus muscle, gastrocnemius-lateral head, and soleus muscle (P<.05). Conclusion: In this study, we analyzed the outcome of muscle activity for clinical inference of robot-assisted gait training with virtual reality (VR). Less muscle activity was measured in the treatment accompanied by VR, therefore, a more systematic, in-depth and well-founded level of follow-up research is needed.

• International journal of advanced smart convergence
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• 제6권1호
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• pp.18-25
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• 2017

Recently, VR HMD (virtual reality head mounted display) has been utilized for virtual training, entertainment, vision therapy, and optometry. In particular, virtual reality contents are increasingly used for vision therapy and optometry. Accordingly, high-quality virtual reality contents such as a natural vision of life is required. Therefore, it is necessary to study the content production according to the optical characteristics of the VR HMD. The purpose of this paper is to suggest a proper FOV (field of view) of contents according to the distortion rate. We produced virtual reality contents and obtained distorted images by virtual camera. The distortion rate is calculated by using the distorted image. It is proved that the optimal FOV of the VR content with the minimum distortion is $90{\sim}100^{\circ}$. The results of this study are expected to be applied to the production of high quality contents.

• 대한안전경영과학회:학술대회논문집
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• 대한안전경영과학회 2004년도 춘계학술대회
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• pp.203-209
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• 2004

Virtual Reality(VR) is a new technology which makes humans communicate with computer. It allows the user to see, hear, feel and interact in a three-dimensional virtual world created graphically. In this paper, we introduced VR into psychotherapy area and developed VR system for the exposure therapy of acrophobia. Acrophobia is an abnormal fear of heights. Medications or cognitive-behavior methods have been mainly used as a treatment. Lately the virtual reality technology has been applied to that kind of anxiety disorders. A virtual environment provides patient with stimuli which arouses phobia, and exposing to that environment makes him having ability to over come the fear. In this study, the elevator stimulator that composed with a position sensor, head mount display, and audio system, is suggested. To illustrate the physiological difference between a person who has a feel of phobia and without phobia, heart rate was measured during experiment. And also measured a person's HR after the virtual reality training. In this study, we demonstrated the subjective effectiveness of virtual reality psychotherapy through the clinical experiment.

• 대한물리치료과학회지
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• 제24권3호
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• pp.1-11
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• 2017

Purpose: The purpose of this study was to investigate the effects of virtual reality based treadmill training on muscle architecture of gastrocnemius in chronic stroke patients. Methods: Thirty chronic stroke patients were randomly assigned to either the virtual reality based treadmill training (VRTT) group (n=15) or treadmill training (TT) group (n=15). Both groups participated in a standard rehabilitation program; in addition, the VRTT group participated in virtual reality based treadmill training for 30 minutes per day, three times per week, for 6 weeks, and TT group participated in treadmill walking training for 30 minutes per day, three times per week, for 6 weeks. Ultrasound image was used for measurement of pennation angle and muscle thickness of the medial gastrocnemius muscle at rest and during maximum voluntary contraction. Results: In the paretic side medial gastrocnemius muscle, greater improvement on the pennation angle and muscle thickness while resting and maximal voluntary contraction were observed in the VRTT group compared with the TT group. Conclusion: Findings of this study demonstrated that the virtual reality based treadmill training has an effect on muscle architecture of medial gastrocnemius in chronic stroke patients.

• Physical Therapy Rehabilitation Science
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• 제9권3호
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• pp.171-177
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• 2020

Objective: This study aimed to investigate the upper limb strength, active joint range of motion (AROM), and upper limb function in persons with chronic stroke using virtual reality training in combination with upper limb sensory stimulation. Design: Two-group pretest-posttest design. Methods: 20 subjects were divided into two groups of 10, the sensory motor stimulation and virtual reality training (SMVR) and virtual reality training (VR) groups. The training was conducted for 30 minutes per session, three times a week for 8 weeks.The participants' upper limb strength was measured via the hand-held dynamometer, joint angle AROM was measured via dual inclinometer, function was measured using the Jebson-Taylor hand function test and the manual function test. Results: Significant differences were observed in all groups before and after the training for upper extremity strength, AROM, and function (p<0.05). Between the two groups, the SMVR group showed significant improvement in muscle strength, AROM, and Jebsen-Taylor hand function test scores compared with the VR groups (p<0.05). Conclusions: In this study, we confirmed that sensory stimulation and VR had positive effects on upper extremity strength, AROM, and function of persons with chronic stroke. The results suggest that in the future, VR in combination with sensory stimulation of the upper limb is likely to become an effective method (a rehabilitation training program) to improve the upper limb function of persons with chronic stroke.

• The Journal of Korean Physical Therapy
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• 제25권5호
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• pp.360-365
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• 2013

Purpose: The purpose of study was to investigate effects of dance sports in virtual reality on balance, depression, and activities of daily living (ADL) in stroke patients. Methods: Subjects of the research consisted of 18 stroke patients who were randomly divided into the experimental and control groups, with nine patients each. All subjects underwent 30 minutes of Neurodevelopmental treatment (NDT) and 15 minutes of Functional electrical stimulation (FES) five days per week for a period of six weeks. Subjects in the experimental group performed an extra 30 minutes of dance sports in virtual reality each day. Balance, depression, and ADL of patients before and after the experiment were measured using Berg's balance scale (BBS), Beck depression inventory (BDI), and Modified Barthel index (MBI), respectively. For comparisone of the state before and after the experiment, wilcoxon signed ranks test was applied and for comparison of the difference between the groups, mannn-whitney U test was applied. Results: Results of this study, showed significant difference in balance, depression, and ADL between the experimental and control groups(p<0.05). As a control of the two groups, the experimental group, which performed extra dance sports in virtual reality, showed a significant difference in balance, depression, and ADL(p<0.05). Conclusion: Depending on the result, a dance sport in virtual reality was verified to enhance balance, depression, and ADL in stroke patients. Therefore, from now on, need for effective program development and application using dance sports in virtual reality will arise.

• 한국정보통신학회논문지
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• 제21권2호
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• pp.361-366
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• 2017

최근 가상현실의 기술이 발달함에 따라 게임중독, 알코올 중독 등에 대한 가상현실 치료 프로그램이 개발되고 있다. 본 연구는 다문화 청소년의 트라우마 중재를 하기 위하여 가상현실에 기반한 인지행동치료 프로그램을 구현하는 개발과정의 모형을 제시하고자 한다. 인지행동치료의 가상현실 프로그램개발은 크게 3단계로 나누어진다. 제1단계에서는 다문화청소년이 트라우마로 인하여 경험한 주요 감정과 표출된 문제를 포함한 트라우마의 특성들을 파악하고 제2단계에서는 트라우마에 대한 인지행동치료를 목표로 한 시나리오를 구성의 전개과정과 범위의 내용을 제시되어야 한다. 최종 제3단계서는 시나리오 콘텐츠의 가상현실프로그램 구현에 대한 타당성 검토를 통해 다문화청소년의 긍정적 변화를 이끌 수 있는 중재 프로그램 개발의 가능성을 제안하였다.

• 재활복지
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• 제22권3호
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• pp.209-224
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• 2018

본 연구는 가상현실 프로그램을 사용한 재활치료의 효과성에 대해 체계적으로 분석하여 국내 임상현장에서 재활치료에 종사하는 의료인, 의료기사 및 연구자들에게 다양한 가상현실 기반의 재활치료와 효과성에 대한 정보를 제공하여 가상현실 기반의 재활치료가 임상에서 적절하게 적용될 수 있도록 하고자 한다. 연구 방법으로 학술연구정보서비스(Research Information Sharing Service; RISS), Google Scholar, Pubmed 데이터베이스를 사용하여 2007년 1월부터 2017년 12월까지의 논문을 검색하였다. 주요 검색어는 'Virtual Reality AND Rehabilitation', 'Virtual reality AND Effect'를 사용하였다. 최종적으로 10편의 해외 학술지에 게재된 논문을 본 연구의 분석 대상으로 선정하였다. 선정된 논문은 PICO (Patient, Intervention, Comparison, Outcome) 형식을 사용하여 정리하였다. 연구 결과 10개의 논문에서 참여한 대상자를 유형별로 분석한 결과, 대상자는 총 4가지로 분류되었으며 그 종류는 뇌졸중, 뇌종양, 파킨슨병, 신장질환이었다. 중재에 사용한 가상현실 기반 도구들은 IREX 3건(30%), X-box Kinect 2건(20%), Nintendo Wii 2건(20%), [Existing tool + VR]이 1건(10%), [Mobile application + VR]이 1건(10%)이었다. 중재 결과 10개의 논문 모두 기능향상이 나타났으며 신체기능이 24회(66%), 정신기능 6회(17%), 인지기능 5회(14%), 일상생활활동이 1회(3%)였다. 따라서 본 연구는 가상현실 기반 재활치료와 그 효과를 정리하여 재활치료서비스의 전문성과 질을 향상시키고, 영역을 확대하는 기초자료로 활용될 수 있을 것이다.

• The Journal of Korean Physical Therapy
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• 제31권2호
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• pp.67-75
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• 2019

Purpose: Patients with brain damage suffer from limitations in performing the activities of daily living (ADL) because of their motor function and visual perception impairment. The aim of this study was to help improve the motor function and visual perception ability of patients with brain damage by providing them with virtual reality-based contents. The usability results of the patients and specialists group were also evaluated. Methods: The ADL contents consisted of living room, kitchen, veranda, and convenience store, similar to a real home environment, and these were organized by a rehabilitation specialist (e.g., neurologist, physiotherapist, and occupational therapist). The contents consisted of tasks, such as turning on the living room lights, organizing the drawers, organizing the kitchen, watering the plants on the veranda, and buying products at convenience stores. To evaluate the usability of the virtual reality-based visual cognitive rehabilitation service, general elderly subjects (n=11), stroke patients (n=7), stroke patients with visual impairment (n=4), and rehabilitation specialists (n=11) were selected. The questionnaires were distributed to the subjects who were using the service, and the subjective satisfaction of individual users was obtained as data. The data were analyzed using SPSS 21.0 software. The general characteristics of the users and the evaluation scores of the experts were analyzed using descriptive statistics. Results: The usability test result of this study showed that the mean value of the questionnaire related to content understanding and difficulty was high, between 4-5 points. Conclusion: The virtual reality rehabilitation service of this study is an efficient service that can improve the function, interest, and motivation of stroke patients.

• 대한감각통합치료학회지
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• 제21권1호
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• pp.34-46
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• 2023

목적 : 본 연구의 목적은 장애 아동 및 청소년에게 적용한 가상현실(Virtual Reality; VR) 기반 작업치료 중재의 효과와 적용 방법에 대해서 체계적으로 분석하고자 한다. 연구방법 : 2012년 1월부터 2022년 8월까지 RISS, DBpia, KCI, Science direct, CINAHL MEDLINE에서 문헌을 검색하였다. 주요 검색용어로 '가상현실', '작업치료', '아동', '청소년', 'Virtual Reality', 'Occupational Therapy', 'Child', 'Adolescent'을 사용하였다. PRISMA의 Flowchart 4단계를 거쳐 총 16편의 문헌을 분석 대상으로 선정하였다. 결과 : 선정된 16편의 연구에서 장애 아동 및 청소년에게 사용된 VR 기반 작업치료 중재가 유의미한 효과를 보였다. 중재 대상자는 뇌성마비 유형 중 편마비 아동을 대상으로 한 연구가 가장 많았으며, 효과 측정에 사용된 평가도구는 일상생활활동, 인지, 운동기술, 사회적-상호작용기술, 시-지각 평가이었다. 중재 도구로는 Nintendo Wii와 Microsoft Kinect가 운동기술 및 일상생활 향상을 위하여 가장 많이 사용되었다. 결론 : 본 연구를 바탕으로 향후에는 장애 아동 및 청소년의 진단과 중재목적에 맞는 VR 도구 선택과 구체적인 방법의 제시를 통하여 VR중재가 임상에서 더욱 효과적으로 사용될 수 있을 것이라 기대한다.