Gait modification during approach phase when stepping over an obstacle in rats
Gait modification during approach phase when stepping over an obstacle in rats
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DOI：
10.1016/j.neures.2011.11.008
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发表时间：
2012-03-01
影响因子：
2.9
通讯作者：
Yanagihara, Dai
中科院分区：
文献类型：
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作者：
Sato, Yamato;Aoki, Sho;Yanagihara, Dai
翻越障碍物避免绊倒是安全平稳移动的重要组成部分。移动中的避障是在接近障碍物和跨过障碍物的过程中分几步完成的。本研究的目的是研究大鼠在跨过不同高度障碍物时在接近阶段的步态调整。在所有四肢中，当脚趾刚好在障碍物上方时，脚趾高度随着障碍物高度的增加而增加，留下了一个安全的边缘。然而，跨过障碍物前脚趾与障碍物之间的水平距离不受障碍物高度的影响。在作为后肢的前肢和后肢中，最后一步的步长及其相关的摆动阶段持续时间显著短于倒数第二步和地面运动。这些结果表明，在助跑阶段的最后一步中，后肢的调整对于跨过障碍物的跨步运动是非常重要的。(C)2011年爱思唯尔爱尔兰有限公司和日本神经科学学会。版权所有。
Stepping over obstacles to avoid tripping is an essential component in safe and smooth locomotion. Obstacle avoidance during locomotion is completed in several steps during the approach phase toward the obstacle and stepping over the obstacle. The purpose of this study was to investigate gait modification during the approach phase when stepping over obstacles of different heights in rats. In all four limbs, the toe height when the toe was just above the obstacle increased depending on the obstacle height, leaving a safe margin. However, the horizontal distance between toe and obstacle just prior to stepping over was not influenced by obstacle height. In the fore- and hindlimbs that served as trailing limbs, it was found that the stride length and its related swing phase duration in the final step were significantly shorter than those in both the penultimate step and overground locomotion. These results suggest that adjustment of trailing limb in the final step during the approach phase is important in preparation for the stepping movement over an obstacle. (C) 2011 Elsevier Ireland Ltd and the Japan Neuroscience Society. All rights reserved.