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정상 성인의 무게 부하 보행이 관절 모멘트의 변화에 미치는 영향
정형국,Chung, Hyung-Kuk 대한물리치료과학회 2003 대한물리치료과학회지 Vol.10 No.2
The purposes of this study were to describe and compare pint moments according to 6 types of gait methods during free speed. 15 volunteers(7 male, 8 female: mean age = 23.33 yrs.) participated and performed 6 types of gait methods. From the 3 types of pint moments of lower extremities(hip, knee, ankle and foot), the following results were made: 1. In left hip pint, the flexion-extension moment was not significantly different, but the adduction-abduction moment and rotation moment were showed different curves during stance phase. 2. In left knee pint, the flexion-extension moment was not significantly different, but the varus-valgus moment and rotation moment were showed different curves during stance phase. 3. In left ankle and foot the dorsiflexion-plantarflexion moment was not significantly different but the varus-valgus moment and rotation moment were showed different curves during stance phase. In conclusion, because weight loading gait with 10-20% of body weight were normal gait patterns, It was inferred that all weight loading gaits did not indicate noxious reactions of human body.
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장애물 높이에 따른 보행의 운동형상학적 변화에 대한 연구
정형국,Chung, Hyung-Kuk 대한물리치료과학회 2008 대한물리치료과학회지 Vol.15 No.3
Background : The Purposes of this study were to understand difference between free walking and obstacle over walking through the naked eye and motion analysis device, and to review merits of obstacle walking training as item of functional assessment in clinical situations. Methods : All participants were male and performed 3 types of walking methods: free walking, obstacle over walking with low block(height=10cm, width=8cm), and obstacle over walking with high block(height=20cm, width=8cm). All walking were performed 3 trials respectively. Results : In the naked eye, initial contact with toes occurred more than heel strike in obstacle over walking, and the flexion angle of hip and knee were increased in obstacle over walking. On interpretations though motion analysis device, cadence, gait speed and weight accept were significant statistically(p<.05). Cadence and gait speed were decreased, and weight accept duration was increased in obstacle over walking. Rotation among three pelvic motions was significant statistically(p<.05), flexion among three hip motions was significant statistically(p<.05) and flexion among three ankle motions was significant statistically(p<.05). Rotation and flexion among three ankle motions was significant statistically(p<.05). Conclusion : Both the naked eye and interpretations of the device presented many difference between free walking and obstacle over walking. In overcrossing obstacles, many participants appeared walking strategy by perform initial contact with toes. Knee flexion was most significant statistically(p<.05) in obstacle over walking with 20cm block.
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지속적인 직류자극이 토끼 비골 골절의 신생골 형성에 미치는 영향
정형국,김진상,박래준,Chung Hyung-Kuk,Kim Jin-Sang,Park Rae-Joon 대한물리치료학회 1994 대한물리치료학회지 Vol.6 No.1
This study was performed to identify the effect of constant direct current and to give us methods which can be applied easily in clinic. Six rabbits was used at this experiment. After each animal was fractured at left fibula, divided into experimental group(n=3) and central group(n=3). Experiment duration of electrical stimulation on experimental rabbits was 35 days. Direct current from fifteen microampere to twenty microampere was passed continously through the placed electrode between fracture area and thigh. Negative electrode was placed at fracture area and positive at thigh. Roentgenography was used to observe bone-healing progression wet three times-at 15days, 25days and 35days after electrical stimulation. The results obtained are as followings: 1. Both experimental group and control group do not obtain callus formation on the first roentgenography(15 days after ES). 2. On the second roentgenography(25 days after ES), experimental group achieves above $70\%$ on fracture-healing, but control group achieves about $20-30\%$ on fracture healing. 3. On the third roentgenegraphy(35 nays after ES), experimental group achieves above $85-95\%$ on fracture healing and control group achieves about $60-70\%$ of bone union. Thus, statistically significance(independent t-test) was occured ie the second and third roentgenography between experimental group and control group.
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정형국,Chung, Hyung-Kuk 대한물리치료과학회 2009 대한물리치료과학회지 Vol.16 No.4
Background: The purpose of this study was to examine changes of postural sway and weight distribution after cooling the foot. Methods: Ten men with no history of sensory, neurological and orthopedic disorders were participated in this study. They performed four methods: (1) non-treated feet group(control group); (2) both feet treated group; (3) right foot treated group; and (4) left foot treated group. The feet of them were put into ice box, then they stood more than forty seconds on EMED system with bared feet. Data on the moving length, velocity, and maximum velocity of COP and the weight distributions during thirty seconds only were measured in standing position. Results: (1) The moving length and velocity of COP were significant difference between control group and both feet treated group only(p<0.05). (2) The maximum velocity of COP was significant difference among control group and all experimental groups. (3) The changes of weight distribution were significant difference among control group and right/left foot treated groups. Conclusions: Cooling the foot led to increased postural sway and changed weight distribution patterns.
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엄지발가락 굽힘근의 제한이 한발서기 균형에 미치는 영향
정형국,김용수,Chung, Hyung-Kuk,Kim, Yong-Soo 대한물리치료과학회 2010 대한물리치료과학회지 Vol.17 No.3
Purpose: The purpose of this study was to examine changes of postural sway between the normal group and treatment group of same people through COP movements. Methods: Fifty men with no history of sensory, neurological and orthopedic disorders were participated in this study. Participants were tested on single limb balance during 30 seconds on EMED system with bared foot. Each of them performed two methods and 5 trials totally each method: (1) non-treated group (2) treated group(with big toe flexion limitation). Data on the moving length, average velocity, instantaneous maximum velocity, mediolateral(x axis) maximum velocity, and anteroposterior(y axis) maximum velocity of COP were measured in single limb standing position. Results: The moving length and average velocity of COP were significant difference between normal and treatment group(p<0.05). On correlation of parameters, the faster average velocity of COP, the higher moving length, instantaneous maximum velocity, mediolateral maximum velocity, and anteroposterior maximum velocity of COP increase. The more Instantaneous maximum velocity of COP, the faster is anteroposterior maximum velocity of COP. Conclusions: Limitation of big toe flexors function affected single limb balance of the normal.
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