경사로 보행 시 경사각에 따른 하지관절의 삼차원적 동작분석 Three-dimesional analysis of kinematics variety on lower extremity during ramp ascent and descent at different dinclinatons원문보기
The aim of this study was to investigate the kinematics of young adults during ramp climbing at different inclinations. Twenty-three subjects ascended and descended a four step at four different inclinations(level, 8˚, 16˚, 24˚). The 3-D kinematics was analysed by a camera-based falcon system. Tempo...
The aim of this study was to investigate the kinematics of young adults during ramp climbing at different inclinations. Twenty-three subjects ascended and descended a four step at four different inclinations(level, 8˚, 16˚, 24˚). The 3-D kinematics was analysed by a camera-based falcon system. Temporal-spatial parameters were analysed by a GaitRite system. Groups difference was tested with one -way ANOVA and SNK test. The different kinematic patterns of ramp ascent and descent were analysed and compared to level walking patterns. In temporal-spatial gait parameters, step length and velocity decreased at both ascent and descent ramp inclinations with over 16 degree, but the step time was not different in descending ramps. Stride length and stance duration changed at 16˚ on the ascending ramp and at -8˚ on the descending ramp. The kinematics of ramp walking could be clearly distinguished from the kinematics of level walking. In general, at heel contact(0% gait cycle) of a ramp ascent the hip and knee joint were flexed and the ankle was dorsiflexed and increased with inclination. In contrast, at heel contact of descent, the hip was slightly flexed, the knee was almost fully extended and the ankle was plantarflexed and increased in knee and ankle with inclination. The angular ranges(at toe off, during stance phase, during swing phase) were also differentiated between during ramp walking and during level walking. In ascending ramp, the different gait pattern occurred at over 16˚ on the ascending ramp, in descending ramp, it occurred at -8˚ descent ramp. These results suggest that there is a certain inclination angle or angular range where subjects do switch between a level walking and a ramp walking gait pattern. This shows their motor control strategy between level and ramp walking. Further studies are necessary to confirm and detect the ascent and descent ramp gait patterns.
The aim of this study was to investigate the kinematics of young adults during ramp climbing at different inclinations. Twenty-three subjects ascended and descended a four step at four different inclinations(level, 8˚, 16˚, 24˚). The 3-D kinematics was analysed by a camera-based falcon system. Temporal-spatial parameters were analysed by a GaitRite system. Groups difference was tested with one -way ANOVA and SNK test. The different kinematic patterns of ramp ascent and descent were analysed and compared to level walking patterns. In temporal-spatial gait parameters, step length and velocity decreased at both ascent and descent ramp inclinations with over 16 degree, but the step time was not different in descending ramps. Stride length and stance duration changed at 16˚ on the ascending ramp and at -8˚ on the descending ramp. The kinematics of ramp walking could be clearly distinguished from the kinematics of level walking. In general, at heel contact(0% gait cycle) of a ramp ascent the hip and knee joint were flexed and the ankle was dorsiflexed and increased with inclination. In contrast, at heel contact of descent, the hip was slightly flexed, the knee was almost fully extended and the ankle was plantarflexed and increased in knee and ankle with inclination. The angular ranges(at toe off, during stance phase, during swing phase) were also differentiated between during ramp walking and during level walking. In ascending ramp, the different gait pattern occurred at over 16˚ on the ascending ramp, in descending ramp, it occurred at -8˚ descent ramp. These results suggest that there is a certain inclination angle or angular range where subjects do switch between a level walking and a ramp walking gait pattern. This shows their motor control strategy between level and ramp walking. Further studies are necessary to confirm and detect the ascent and descent ramp gait patterns.
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