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전후방 및 내외측 방향의 동적 움직임에 따른 균형 및 근육 활성도 특성
김충연,정호현,이범기,정덕영,전경진,임도형,Kim, ChoongYeon,Jung, HoHyun,Lee, BumKee,Jung, Dukyoung,Chun, Kyeong Jin,Lim, Dohyung 대한의용생체공학회 2013 의공학회지 Vol.34 No.4
Falling is one of the major public problems to the elderly, resulting in limitations of daily living activities. It can be induced by the functional loss of the balance ability and muscle strength in the elderly. It has been, however, not well investigated to suggest an effective methodology improving the balance ability and muscle strength for the prevention of the falling due to lack of information about the characteristics of the balance and muscle activations responded to the dynamic motions. The aim of the current study is, therefore, to identify the characteristics of the balance and muscle activations responded to the dynamic motions in Anterior-Posterior(AP) and Medial Lateral(ML) directions. For that, a motion capture system with eight infrared cameras, surface electromyogram system and Wii Fit system with a customized variable unstable base were used and kinematic and kinetic data obtained from the systems were analyzed for five healthy male($24.8{\pm}3.3years$, $177.4{\pm}2.0cm$, $73.9{\pm}12.9kg$, $23.5{\pm}4.0kg/m$). The results showed that the characteristics of the balance and muscle activations were differently responded to between the dynamic motions in Anterior-Posterior(AP) and Medial Lateral(ML) directions. These findings may indicate that customized dynamic motions should be applied to the training of the balance ability and muscle strength for the effective prevention of the falling. This study may be meaningful to providing basic information to establish a guideline improving effectively the balance ability and muscle strength.
뇌파(EEG)를 통한 콘텐츠 환경에 따른 집중도 차이 분석
김우섭(Wooseop Kim),정덕영(Dukyoung Jung),신영석(Youngseok Shin),구원회(Wonhoe Gu),석애은(Ae-eun Seok),조현영(Hyunyoung Cho),최민라(Minra Choi) 대한전자공학회 2019 대한전자공학회 학술대회 Vol.2019 No.11
In 2018, the number of adults aged 65 and older already approached 14% of total population. It is grown rapidly by year. the increase is principally due to the maturing of baby boomer born in Korea between 1955 and 1963. In 2020, the first baby boomer will turn 65, and by 2028 the entire baby boom generation will be 65 or older. They describe themselves as thriving and healthy and consider aging well as a lifestyle and have an enormous economic power and hope to engaging a variety of cultural and leisure activities. Most of them are often used to enjoy internet contents through a smartphone or PC. But it is not easy to access because of contents’ user interface or environment that was focused on eco generation. So, we study that how does web environment affect attention of elderly people. Using the electroencephalography, we measured and analyzed averaged band power and calculated beta/alpha, theta/beta ratios. As a result, generally delta, theta band power and theta/beta ratio are higher in normal environment. On the contrary beta power, beta/alpha ratio are higher in customized environment that is customized reflecting cognitive function of elderly people. These results propose that the attention of elderly people varies among web environments.
균형 훈련 플레이트 시스템을 이용한 생체역학적 특성 연구
전성철,임희철,이창형,김태호,정덕영,전경진,Jun, SungChul,Lim, HeeChul,Lee, ChangHyung,Kim, TaeHo,Jung, DukYoung,Chun, KeyoungJin 대한의용생체공학회 2015 의공학회지 Vol.36 No.5
The purpose of this study was to investigate the unstable plate system for the advanced balance ability. 7 male volunteers (age $33.7{\pm}1.2$ years, height $174.7{\pm}3.8cm$, weight $86.0{\pm}3.6kg$, BMI $28.2{\pm}2.0kg/m^2$) performed the partial squat motion on the shape of CAP type(${\cap}$) and BOWL type(${\cup}$) plate system. The range of motion (ROM) and muscle activation were acquired by the motion analysis system and the EMG system. Results of ROMs of the CAP type plate system were shown the widely range of the deviation in the ankle joint on the sagittal plane (sagittal plane - hip joint $10.7^{\circ}$ > $5.4^{\circ}$, knee joint $16.3^{\circ}$ > $6.4^{\circ}$, ankle joint $18.8^{\circ}$ > $6.3^{\circ}$ ; transverse plane - hip joint $3.5^{\circ}$ > $1.8^{\circ}$, knee joint $5.3^{\circ}$ > $3.4^{\circ}$, ankle joint $11.3^{\circ}$ > $5.3^{\circ}$ ; frontal plane - hip joint $0.9^{\circ}$ > $0.5^{\circ}$, knee joint $0.8^{\circ}$ > $0.6^{\circ}$, ankle joint $4.8^{\circ}$ > $3.7^{\circ}$). Muscle activation results of the CAP type plate system were indicated higher in major muscles for balance performance than the BOWL type plate system (vastus lateralis 0.90 > 0.62, peroneus longus 0.49 > 0.21, biceps femoris 0.38 > 0.14, gastrocnemius 0.11 > 0.05). These findings may indicate that the CAP type plate system would expect better effectiveness in perform the balance training. This paper is primary study for developing balance skills enhancement training device.