• 한국인터넷방송통신학회논문지
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• 제19권1호
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• pp.279-287
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• 2019

본 논문에서는 신체의 움직임 정보와 족압 분포의 변화를 측정하여 신체 균형 능력을 분석하고자 하였다. 그래서 관성측정장치와 FSR 센서를 사용하여 관절가동범위와 신체압력중심을 측정하고 분석할 수 있는 프로그램을 개발하였고, 이에 대한 결과를 바탕으로 균형 능력 개선에 도움을 줄 수 있는 콘텐츠를 제작하였다. 이 프로그램에서 측정된 관절가동범위와 신체압력중심의 정량적인 값을 실시간으로 시각화하여 사용자가 결과를 쉽게 알 수 있도록 하였다. 또한 콘텐츠는 측정된 균형정보를 바탕으로 난이도가 조절되며 균형능력을 개선하고자 하는 방향에 맞춰 수행할 수 있도록 제작되었다. 이것은 사용자의 동작에 따라 움직이는 물체를 보면서 진행하는 시각 되먹임 방법을 이용하여 집중력과 참여의지를 높여 더욱 효과적인 균형 훈련 결과를 기대할 수 있다.

• 대한의용생체공학회:의공학회지
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• 제28권5호
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• pp.609-617
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• 2007

In this paper, a new rehabilitation training system was developed to improve equilibrium sense of the elderly by combining virtual reality technology with a fixed exercise bicycle. In order to evaluate the effectiveness of the training system, the elderly participated as test subject in the investigation of the influence of different the parameters on postural balance control. We measured three different running modes of virtual bicycle system with two successive sets. The parameters measured were running time, velocity, the weight movement, the degree of the deviation from the road, and the variables about the center of pressure. The repeated training, our results showed that the running capability of the elderly improve compared. In addition, it was found out that the ability of postural control and the equilibrium sense was improved with the presentation of the visual feedback information of the distribution of weight. From the results of this experiment, we showed that our newly developed system might be useful in the diagnosis of equilibrium sense or in the improvement of the sense of sight and, somatic, and vestibular sense of the elderly in the field of rehabilitation training.

• 한국멀티미디어학회논문지
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• 제19권5호
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• pp.826-836
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• 2016

Mastering a musical instrument for an unskilled beginning learner is not an easy task. It requires playing every note correctly and maintaining the tempo accurately. Any music comes in two forms, a music score and it rendition into an audio music. The proposed method of assisting beginning music players in both aspects employs two popular pattern recognition methods for audio-visual analysis; they are support vector machine (SVM) for music score recognition and hidden Markov model (HMM) for audio music performance tracking. With proper synchronization of the two results, the proposed music learning assistant system can give useful feedback to self-training beginners.

• The Journal of Korean Physical Therapy
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• 제35권5호
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• pp.156-161
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• 2023

Purpose: This study examined the effects of subjective visual vertical perception and head orientation on static balance control. Methods: The subjects were 25 young and healthy adults. The vertical perception was measured using a subjective visual vertical (SVV), and the Center of pressure (COP) parameter was analyzed by continuously measuring the movement of the COP to determine the changes in static postural control. The group was divided based on a deviation of 3° in SVV (11 of SVV≥3°, 14 of SVV<3°) and measured with different head orientations: front, up, down, left, and right in the upright and tandem positions, respectively. Results: In the upright position, the SVV≥3° group had significantly larger values for all COP parameters (Sway length, Surface, Delta X, Delta Y, and Average speed) compared to the SVV<3° group (p<0.05). In the tandem stance, only the Ellipse Surface value was significantly larger among the COP parameters in the group with SVV≥3° compared to the group with SVV<3°(p<0.05). In contrast, the other COP parameters were not significantly different (p>0.05). The effects of static balance control on the head orientation were not statistically significant (p>0.05), and the interactions between the subjective vertical perception and head orientation were not significant (p>0.05). Conclusion: These results suggest that pathological deviations in SVV are associated with impaired static balance performance. This study can provide a therapeutic rationale for using visuospatial cognitive feedback training to improve the static balance.

• 한국산학기술학회논문지
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• 제21권1호
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• pp.284-290
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• 2020

본 연구는 SNAGs(Sustained natural apophyseal glides)기법과 시각을 융합한 바이오피드백 훈련이 목 기능 장애 환자에게 고유수용성 감각과 목의 기능장애에 미치는 영향을 알아보고자 하였다. 목 기능장애 환자 31명을 대상으로 무작위로 SNAGs기법과 바이오피드백 훈련으로 할당하였으며, 관절위치 감각과 목 기능장애 평가를 중재 전-후 실시하였다. 16명의 SNAGs 중재그룹은 멀리건 벨트를 이용하여 굽힘, 폄, 회전을 실시하였고, 15명의 바이오피드백군은 시각적 피드백을 통한 깊은목 굽힘근 훈련을 실시하였다. 두 집단은 동일한 시간, 동일한 조건에서 20분 동안 주당 2회를 4주간 실시하였다. 바이오피드백 훈련 집단이 SNAGs 집단보다 고유수용성 감각에서 좌, 우 회전 모두 유의한 향상을 보였으며(p< 0.05), 목 기능장애는 SNAGs기법을 이용한 집단이 바이오피드백 훈련 집단보다 유의한 효과를 보였다(p<0.05). 따라서 SNAGs기법은 목의 기능제한 해결에 효과적이며, 바이오피드백 훈련은 고유수용성 감각 향상에 긍정적인 중재 방법이 될 것이다. 향후 목 통증 환자에 대한 연구를 진행시, 질환의 특성에 따라 중재방법을 선택 할 수 있을 것이다.

• 한국전문물리치료학회지
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• 제25권1호
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• pp.1-11
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• 2018

Background: The continuous co-contraction of the trunk muscles through trunk stabilization exercises is important to patients with lumbar spinal stenosis (LSS). However, intentional abdominal muscle contraction (IAMC) for trunk stabilization has been used only for specific training in the treatment room. Objects: The purpose of this study was to provide feedback to adults with LSS to enable IAMC during activities of daily living (ADLs). Methods: The participants with spinal stenosis were divided into an experimental group of 15 adults and a control group of 16 adults. Electromyographic signals were measured while the subjects kept their both hands held up at $90^{\circ}$. The measured muscles were the rectus abdominis (RA), external oblique (EO), internal oblique (IO), and erector spinae (ES). Pelvic tilt was measured using a digital pelvic inclinometer. The degree of pain was measured using the visual analogue scale (VAS) and functional capacity was measured using the Korean version of the Oswestry disability index (KODI). Results: While the experimental group showed statistically significantly higher activities in the RA, EO, and IO after the intervention compared with the control group. Pelvic tilt was significantly decreased only in the experimental group. Both the experimental and control groups exhibited statistically significant declines in the VAS and KODI (p<.01). In terms of the levels of changes, the experimental group exhibited a statistically significant larger decline only in the VAS and the pelvic tilt when compared with the control group (p<.05). Conclusions: The subjects could stabilize their trunks, and relieve their pain and dysfunctions and reduce pelvic tilt by learning abdominal muscle contraction during ADLs. The combination of therapeutic exercises and IAMC may have greater effects on patients with LSS.

• 대한물리의학회지
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• 제11권4호
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• pp.105-114
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• 2016

PURPOSE: This study is to investigate the therapeutic effect of Tetrax on balance dysfunction caused by ataxia in cerebellar stroke. METHODS: A total of thirty subjects with cerebellar stroke were recruited. The participants was divided into two groups, the experimental (n=15) and the control group (n=15). Tetrax training and conventional physical therapy (CPT) were performed in experimental group, whereas the patients in the control group were treated with CPT twice a day. Each session of the Tetrax and CPT was carried out for 30 minutes, 5 times per week for 4 weeks. Korean version of the Scale for the Assessment and Rating of Ataxia (K-SARA) was the primary outcome measure, and the secondary outcomes covered Berg balance scale (BBS), falling index (FI), Timed up and go (TUG), and modified Barthel index of Korean version (K-MBI). All outcome measures were evaluated before and after 4 weeks. RESULTS: K-SARA was decreased significantly after 4 weeks intervention in both the experimental (p<.05) and the control group (p<.05). Furthermore, the experimental group produced significantly better outcomes in K-SARA, BBS, FI, and TUG compared with the control group (p=.012, p=.027, p=.008, and p=.048). There were significant correlations between K-SARA and BBS, FI, TUG, and K-MBI (p<.001, p<.001, p=.004, and p<.001). CONCLUSION: The restoration of ataxia was related with the improvement of the balance, falling risk, mobility, and activity of daily living. Tetrax training was effectively aided recovery of ataxia after cerebellar stroke.

• 대한물리의학회지
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• 제15권4호
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• pp.145-153
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• 2020

PURPOSE: This study compares the effects of HUBER rehabilitation and general rehabilitation treatment on the coordination, balance, and walking ability of stroke patients. METHODS: This study enrolled 38 randomized stroke patients, and data was collected for 6 weeks. All participants were randomly assigned to either the experimental group (n = 19) or control group (n = 19). The experimental group were administered Huber rehabilitation and general rehabilitation treatment. The control group was given only general rehabilitation treatment. Both treatments were conducted for 30 minutes during each training session, 3 training sessions per week, for 6 weeks. The coordination, balance, and walking ability were evaluated before and after the intervention, to compare the intergroup and intragroup changes. RESULTS: Change in the right LOS (limit of stability) (p < .001) and forward LOS (p < .02) following intervention were significantly greater in the experimental group than in the control group, but no significant group difference was observed between left LOS (p > .1) and backward LOS (p > .2). Alterations in coordination (p < .02) and TUG (p <. 05) were significantly greater after intervention in the experimental group than in the control group. CONCLUSION: These findings suggest that HUBER rehabilitation is effective in improving the coordination, balance, and walking ability in stroke patients. To strengthen and validate the results of this study, future studies related to HUBER rehabilitation are required.

• 사물인터넷융복합논문지
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• 제8권6호
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• pp.115-122
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• 2022

최근 병원 밖 심정지 환자의 생존율 향상을 위한 일반인 대상 심폐소생술 교육의 중요성이 강조되고 있다. 일반인 대상 효과적인 심폐소생술 교육을 위해 보다 정확하고 생동감 있는 교육전략이 필요하다. 이에 본 연구에서는 확장현실 기반의 심폐소생술 교육시스템을 개발하고 일반인을 대상으로 교육한 사용성 평가 결과를 제시한다. 3개의 응용프로그램으로 구성된 확장현실 기반 심폐소생술 교육시스템에서는 첫 번째 마네킹에 정합된 3D 심장 해부도를 스마트글라스에 전송하여 가슴압박 지점을 안내한다. 두 번째 응용프로그램은 스마트글라스를 통해 심폐소생술 과정에 대한 시·청각적 정보를 제공함과 동시에 스마트워치의 진동 알림을 전송하여 심폐소생술의 정확한 압박 속도를 안내한다. 세번째 Add on kit는 마네킹에 설치된 센서를 통하여 흉부 압박의 깊이와 속도에 대한 즉각적인 피드백 정보를 스마트폰으로 전송한다. 본 연구에 참여한 93명의 대상자는 확장현실 기반 심폐소생술 교육시스템이 현장감과 효과성 측면에서 긍정적이라 평가하였다. 확장현실 기술을 이용한 정합기술은 현장감과 몰입도를 높이고 자기 주도적 훈련을 쉽게 함으로서 심폐소생술 교육 운영 효율성 향상에 이바지할 수 있다.

• 한국운동역학회지
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• 제21권1호
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• pp.31-38
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• 2011

This study aimed to determine the effects of the blockage of visual feedback on joint dynamics of the lower extremity. Fifteen healthy male subjects(age: $24.1{\pm}2.3\;yr$, height: $178.7{\pm}5.2\;cm$, weight: $73.6{\pm}6.6\;kg$) participated in this study. Each subject performed single-legged landing from a 45 cm-platform with the eyes open or closed. During the landing performance, three-dimensional kinematics of the lower extremity and ground reaction force(GRF) were recorded using a 8 infrared camera motion analysis system (Vicon MX-F20, Oxford Metric Ltd, Oxford, UK) with a force platform(ORG-6, AMTI, Watertown, MA). The results showed that at 50 ms prior to foot contact and at the time of foot contact, ankle plantar-flexion angle was smaller(p<.05) but the knee joint valgus and the hip flexion angles were greater with the eyes closed as compared to with the eyes open(p<.05). An increase in anterior GRF was observed during single-legged landing with the eyes closed as compared to with the eyes open(p<.05). Time to peak GRF in the medial, vertical and posterior directions occurred significantly earlier when the eyes were closed as compared to when the eyes were open(p<.05). Landing with the eyes closed resulted in a higher peak vertical loading rate(p<.05). In addition, the shock-absorbing power decreased at the ankle joint(p<.05) but increased at the hip joints when landing with the eyes closed(p<.05). When the eyes were closed, landing could be characterized by a less plantarflexed ankle joint and more flexed hip joint, with a faster time to peak GRF. These results imply that subjects are able to adapt the control of landing to different feedback conditions. Therefore, we suggest that training programs be introduced to reduce these injury risk factors.