The Relationship Between Ankle Muscles and An EMG-Based Physically Interactive Game

고유민,박설,이호철,임창훈,박지원 대한물리치료학회 2015 대한물리치료학회지 Vol.27 No.6

Purpose: This study was to identify the relationship between the game score and muscle strength in order to elucidate whether the obtained score for the dorsiflexor and plantar flexor muscles in the ankle joint using an EMG-based interactive game system can reflect muscle strength as measured conventionally. Methods: Forty adults were enrolled in the present study. They had no congenital deformities, and no neurological or orthopedic disorders in the 6 months prior to the start of the study. The Biodex were used to measure the isokinetic concentric maximal strength of the plantar flexor and dorsiflexor muscles in the ankle joint. EMG electrodes were attached to the tibialis anterior and gastrocnemius. Results: (1) There was a positive relationship between the obtained game score by the plantar flexor (sPF) and muscle strength of the plantar flexor (tPF) and dorsiflexor (tDF). In addition, the tPF affected the sPF, but the tDF did not. Thus, the higher the tPF, the higher the sPF. (2) There was no relationship between the obtained game score of dorsiflexor (sDF) and tPF or tDF. In addition, neither the tDF or tPF affected the sDF. Conclusion: The game score had a relationship with muscle strength, which is related to ankle instability and re-impairment. Thus we suggest that this game system can be used to predict the degree of weakness of muscle strength.

비즈니스 여행자를 위한 중저가호텔 선택속성에 따른 만족도, 행동의도 영향관계 연구 - 대전지역 호텔을 중심으로 -

고유민,홍민정 한국호텔리조트학회 2019 호텔리조트연구 Vol.18 No.4

This study is based on previous researches related to budget hotels, selection attributes and behavioral intentions, and direct experiences and management data and surveys on budget hotels. The purpose of this study was to identify the relations of behavioral intentions and to use the results to suggest ways to improve and revitalize budget hotels in Daejeon. According to the analysis result, the selection attribute of budget hotels affects customer satisfaction, indicating that price is the most influential factor in customer satisfaction. This means that business travelers are more frequent than one-time visits, and knowing what they want, and responding quickly and continually returning can save the marketing costs of attracting new customers. In addition, hotel reputation did not affect satisfaction or behavioral intention among hotel selection attribute factors. It was found that budget hotels were more practical than hotel brand or recognition than luxury hotels. These results identify the characteristics of business travelers choosing middle and low-priced hotels in Daejeon area, identify the influence relationship between satisfaction and behavioral intention, and selectively focus investments on their desired areas. It can be used as basic data for future efficiency and rational management.

Effects of Lumbar Position Sense on Swing Chair in Healthy Adults

고유민,박설,김윤진,윤수빈,장권욱,박지원 대한물리치료학회 2012 대한물리치료학회지 Vol.24 No.3

Purpose: To recognize the change in the proprioception under conditions that activate the local muscles, this study found the difference in the proprioception on a fixed and swing chair. Methods: Healthy adults (7 males, 13 females) in their twenties were evaluated lumbar position sense on fixed and swing chair. And the difference of the position sense between the fixed and swing chair were analyzed. Results: The joint position senses were compared between the fixed and swing chair. As a result, there was a significant difference from all motions. Conclusion: This study found that the improvement of proprioception using swing chair means that the local muscle is activated. Therefore, to use a swing chair, which was designed in this study, is able to replace the general chair either at work or during studies. Thus, this method is easily accessible for busy modern people who are exposed to low back pain or spinal disorders due to a pattern of inactivity. Purpose: To recognize the change in the proprioception under conditions that activate the local muscles, this study found the difference in the proprioception on a fixed and swing chair. Methods: Healthy adults (7 males, 13 females) in their twenties were evaluated lumbar position sense on fixed and swing chair. And the difference of the position sense between the fixed and swing chair were analyzed. Results: The joint position senses were compared between the fixed and swing chair. As a result, there was a significant difference from all motions. Conclusion: This study found that the improvement of proprioception using swing chair means that the local muscle is activated. Therefore, to use a swing chair, which was designed in this study, is able to replace the general chair either at work or during studies. Thus, this method is easily accessible for busy modern people who are exposed to low back pain or spinal disorders due to a pattern of inactivity.

Study on the Correlation Between the Imbalance of Muscle Strength and the Score of EMG-Biofeedback Game at Ankle Joint in Healthy Adults

고유민,박설,임창훈,이우진,박지원 대한물리치료학회 2015 대한물리치료학회지 Vol.27 No.6

Purpose: This study investigated whether the strength imbalance between two muscles can affect the score of EMG based biofeedback game, and whether the EMG based biofeedback game score can be used as predictable indicator of the degree of muscle balance alternating the conventional strength measuring equipment. Methods: 40 participated in this study. Biodex was used to measure the peak torque/weight in order to calculate the muscle strength balance index between plantar flexor and dorsiflexor of ankle joint. And muscle balance index (MBI) was calculated. The EMG biofeedback game scores of dorsiflexor and plantar flexor were acquired, so that the EMG electrodes were attached at tibialis anterior and gastrocnemius. The relationship between the game score and the muscle balance index were analyzed. Results: There was negative correlation between the muscle balance index between plantar flexor and dorsiflexor and the peak torque/weight of plantar flexor (r=-0.70). And there was negative correlation between the muscle balance index between plantar flexor and dorsiflexor and the game score of plantar flexor (r=-0.83). Conclusion: The EMG biofeedback game score had significant relationship with muscle imbalance at ankle joint, so it seems that the game score can be used for predicting the degree of muscle imbalance as a parameter.

정상 성인 여성의 발목관절에서 근력 균형과 관절위치감각의 상관관계

고유민,정미숙,박지원,Ko, Yu-Min,Jung, Mi-Suk,Park, Ji-Won 대한물리치료학회 2011 대한물리치료학회지 Vol.23 No.2

Purpose: The purpose of this study was to determine whether there is a relationship between strength balance and joint position sense related to the ankle joint in healthy women. Methods: Twenty-six healthy women were recruited. Isokinetic strength and joint position sense (JPS) were measured using a Biodex System 4 pro Dynamometer and a Biodex Advantage Software Package. Prior to measuring the JPS and isokinetic strength, the dominant foot was determined according to the Waterloo Footedness Questionnaire. After the JPS test, isokinetic strength was evaluated in velocity $60^{\circ}s$, including practice trial ($90^{\circ}s$). Using the measured isokinetic strength, a Strength Balance Index (SBI) was calculated. Results: Relative to the SBI, the degree of imbalance was varied; but there were imbalances. For each starting position, JPS error showed no significant differences (p>0.05). The relationship between SBI and JPS was found during the inversion to eversion process, eversion to inversion, and dorsi flexion to plantar flexion. Conclusion: There are moderate to mild relationships between JPS and SBI during ankle movement. It is suggested that to prevent ankle injuries, strength balance should be considered along with the other potential factors including anatomical alignment, proprioception, and soft tissues problems.

고려 龍樹殿閣文鏡 도상과 양식연구

고유민 한국대학박물관협회 2014 고문화 Vol.83 No.-

Many Bronze mirrors were cast in a large variety of shapes, sizes, and designs in the Goryeo dynasty. It is considered that this phenomenon occurred due to the abundant copper production, the mass production system of bronze mirrors, the influence of Chinese bronze mirrors, and the custom of burying personal belongings with the deceased during this period. The bronze mirror with Dragon, Tree, and Palace designs is regarded as a representative Goryeo bronze mirror. However, there have been different views about the origin of this bronze mirror because Chinese bronze mirrors with similar designs and characteristics of production system make it hard to clarify its origin. This study analyzed the bronze mirror with Dragon, Tree, and Palace designs to prove its representative characteristics as a mirror which was designed and cast in Goryeo. The origin of the motif on this bronze mirror was influenced by Chinese mirrors which are related to the Lunar Palace myth and Taoism. However, the types and expressions of the Goryeo motif are certainly different from Chinese ones. All motifs are expressed in different ways and important motifs such as a dragon, a toad, clouds, a flame-shaped mani and an expression of flame behind a rabbit appeared in this bronze mirror for the first time. This difference suggests that this bronze mirror tried to imply Buddhism and Taoism which were prevalent in the period. This study also dealt with its stylistic development from the Chinese mirrors and its own stylistic features. The bronze mirror with Dragon, Tree, and Palace designs implied Goryeo taste and thought with fine metalwork in the distinguished way of the Goryeo dynasty, and this is significant as it was the period which foreign influences were prevalent. Furthermore, there was another type that imitated this bronze mirror which shows its popularity and makes this bronze mirror that much more important and meaningful. 고려시대의 銅鏡은 다양한 문양과 형태로 다량 출토되어, 고려시대 전후의 동경과는 뚜렷하게 구분되는 양상을 보인다. 이러한 양상은 고려에 銅이 풍부하게 생산되던 배경과, 대량생산이 가능한 동경의 제작방식, 중국 舶載鏡, 再鑄鏡, 倣製鏡의 다량 유통, 일용품을 부장하던 고려시대의 부장풍습 등이 복합적으로 작용한 결과로 여겨진다. 고려 龍樹殿閣文鏡은 이러한 배경 속에 고려에서 제작된 것으로 여겨지는 대표적인 동경이다. 하지만 제작지를 명확하게 규명하기 어려운 동경의 특성과, 중국의 동경 중 도상 및 구도에서 비교·대조의 근거가 되는 동경이 있어, 용수전각문경이 고려의 독자적인 동경으로 언급되는 데에 이견이 제기되기도 하였다. 본 논고에서는 용수전각문경의 도상과 양식을 분석하여 고려에서 제작된 대표적인 동경으로서의 면모와 내포하고 있는 의의를 살펴보았다. 용수전각문경 도상의 연원은 중국 月宮故事文鏡에서 찾아볼 수 있지만, 용수전각문경에 등장하는 도상이 모두 다르게 표현되고 있고, 용과 화염보주, 토끼 뒤의 화염문양과 두꺼비, 구름 등 새로운 도상을 삽입하여 고려시대에 성행하던 도교와 불교를 조화롭게 담아내고자 하였음을 밝혔다. 또한 중국의 월궁신화를 배경으로 하고 있는 月宮鏡부터 月宮故事文鏡에 이르는 양식의 성립과 이와 구분되는 용수전각문경 양식의 성립을 정리하였다. 이를 통하여 용수전각문경이 고려에서 새롭게 제작된 동경으로서의 실질적인 가능성을 높이고, 동시에 고려에서 애호된 동경이었음을 증명하였다. 중국 동경의 영향이 지배적이던 가운데, 용수전각문경과 같이 고려의 사상을 담은 세밀하고 우수한 동경이 주조되었다는 것은 고려시대 동경에 대한 새로운 해석을 제시해주며, 나아가 번안이 이루어질 정도로 애호되었다는 것은 중요한 의의와 가치를 지닌다.

호텔 객실 서비스 스케이프 지각이 고객감정을 통한 고객가치에 미치는 영향

고유민(Ko, You-Min),이지문(Lee, Gi-Moon) 한국관광레저학회 2018 한국관광레저학회 학술발표대회 Vol.2018 No.12

This study was conducted in order to promote quantitative, qualitative, and consistent growth of the hotel rooms. The conclusions of the study were drawn based on a survey for 260 customers who often use a deluxe hotel rooms. Results are as follows: First, hotel rooms Servicescape affect the positive emotions and negative emotions of customers. Second, hotel rooms and Servicescape will have a significant impact on customer value. Third, positive emotions and negative emotions hotel rooms available, customers have a significant impact on customer value. New understanding of the importance of the hotel’s room service department of this study will be presented and an effective management strategy. I hope that there will be furths studies from sampling to positive study on this issue in consideration of the conclusions and the limits of this study.

영재아 대상 스트레스 대처 프로그램이 영재아의 스트레스 인식 및 대처에 미치는 효과

고유민(Yoo-min, Go),김유미(You-me, Kim) 한국영재교육학회 2013 영재와 영재교육 Vol.12 No.3

본 연구의 목적은 영재아 대상 스트레스 대처 프로그램이 영재아의 스트레스 인식 및 대처에 미치는 효과를 검증하는 것이다. 이를 위해 연구문제를 영재아 대상 스트레스 대처 프로그램이 초등학교 영재아의 스트레스 인식수준 감소 및 스트레스 대처능력 향상에 효과적인가로 설정하였다. 연구문제 해결을 위해 서울특별시 T초등학교 수학영재학급을 실험집단으로 선정하고, 서울특별시 소재 6개 수학영재학급 중 스트레스 인식수준 및 대처행동 검사 결과가 실험집단과 동질집단으로 나타난 S초등학교 수학영재학급을 통제집단으로 선정하였다. 이후 실험집단에 6주 동안 총 10회기의 영재아 대상 스트레스 대처 프로그램을 적용하였다. 프로그램 종료 후 실시한 사후검사 점수를 다변량 분산분석(MANOVA)한 결과, 실험집단이 통제집단에 비해 스트레스 인식수준이 낮게 나타났으며, 스트레스 대처능력은 유의미한 차이가 있는 것으로 나타났다. 이러한 결과는 본 연구의 영재아 대상 스트레스 대처 프로그램이 영재아의 스트레스 인식수준 감소와 스트레스 대처능력 향상에 효과적임을 의미한다. The purpose of this study was to examine the effects of stress coping program for gifted children on their stress recognition and coping. The subjects were two groups(20 children in each group) from the gifted children classes of T elementary school and S elementary school in Seoul. Prior to the experimental treatment, stress recognition level and stress coping inventory were administered, then the experimental group participated in 10 sessions of stress coping program for 6 weeks, while the control group did not. To verify the effects of stress coping program for gifted children, post-test was administered after treatment. The results were analyzed by MANOVA and repeated MANOVA. The findings of the study were as follows: Compared to the control group, the experimental group is significantly low in stess recognition level and significantly high in stress coping ability. The above results can be taken as the indication that stress coping program for reducing gifted children’s stress recognition level and improving theirs stress coping ability can be applied in elementary school's gifted classrooms to reduce stress recognition level and improve stress coping ability.

Effect of Trunk Side Shift Exercise on the Cobb’s Angle of Patients with Idiopathic Scoliosis

이우진,고유민,박지원 대한물리치료학회 2017 대한물리치료학회지 Vol.29 No.5

Purpose: This study examined the effects of trunk side shift exercise on the Cobb’s angle. Methods: Fifty-eight subjects (control group=30, scoliosis group=28) were enrolled in this study. The idiopathic scoliosis groups were divided randomly into two groups, a side shift exercise (SSE) group, and a trunk stabilization exercise (TSE) group. The SSE group performed side shift exercise on the developed chair training for eight weeks. The TSE group performed trunk stabilization exercise. A oneway ANOVA test was carried out to compare the results within the idiopathic scoliosis patient group before and after the exercises based on the different exercise methods. Results: The Cobb’s angles were compared among control group and SSE group and TSE group. As a result, there was a significant difference from SSE group and TSE group(p=0.000), but there were no significant differences between the SSE and TSE groups (p=0.085). Conclusion: Side shift exercises are effective in improving the Cobb’s angle. Therefore, the use of the side shift exercise chair designed in this study can replace general exercise either at work or during studies. Therefore, this method is easily accessible for busy modern students who are exposed to scoliosis or spinal disorders due to a pattern of inactivity.

Comparison of EEG Changes Induced by Action Execution and Action Observation

김지영,고유민,박지원 대한물리치료학회 2017 대한물리치료학회지 Vol.29 No.1

Purpose: Recent electrophysiological studies have shown that the sensorymotor cortex is activated during both actual action excuted by themselves and observation of action performed by other persons. Observation of action based on mirror neuron system can be used as a cognitive intervention to promote motor learning. The purpose of this study was to investigate the brain activity changes during action observation and action execution using EEG. Methods: Thirty healthy volunteers participated and were requested to perform hand action and to observe the video of hand action performed by another person. The EEG activity was evaluated by a method which segregated the time-locked for each condition. To compare the differences between action observation and execution, the Mu suppression and the relative band power were analysed. Results: The results showed significant mu suppression during the action observation and execution, but the differences between the two conditions were not observed. The relative band power showed a significant difference during the action observation and execution, but there were no differences between the two conditions. Conclusion: These results indicate that action execution and observation involve overlapping neural networks in the sensorymotor cortical areas, proposing positive changes on neurophysiology. We are expected to provide information related to the intervention of cognitive rehabilitation.