Characteristics of gait in stepping over obstacles
Characteristics of gait in stepping over obstacles
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DOI：
10.1016/0167-9457(96)00022-x
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发表时间：
1996-08-01
影响因子：
2.1
通讯作者：
Begg, RK
中科院分区：
文献类型：
--
作者：
Sparrow, WA;Shinkfield, AJ;Begg, RK
人类的步态经过精确而连续的调整，以便安全地通过障碍物，而不会对下肢轨迹进行过多的调整。为了研究障碍物的清除情况，对健康的成年受试者(6男6女)进行了跨过调整为腿长10%、25%和40%的障碍物的录像。障碍物高度对铅足间隙的影响相对较小，而步道间隙则呈系统性增加。随着身高的增加，在正常步幅中，前脚更早地交叉，但交叉距离保持在正常步长的80%左右。步距随着高度的增加而增加，而穿越时间不变。对这些发现的讨论集中在一个运动控制过程上，在这个过程中，来自视觉引导的先导足的信息可能被用来控制尾足的轨迹。
Human gait is precisely and continuously adapted in order to negotiate obstacles safely and without excessive modulations to lower limb trajectories. To investigate obstacle clearance, unimpaired healthy adult subjects (6 male and 6 female) were videotaped stepping over an obstacle adjusted to 10%, 25%, and 40% of leg length. Lead foot clearance was relatively uninfluenced by obstacle height whereas trail clearance increased systematically. As height increased the lead foot crossed earlier in the normalised stride but crossing distance remained at about 80% of normalised stride length. Trail foot clearance increased with height while crossing time was unchanged. Discussion of these findings focussed on a motor control process in which information from the visually-guided lead foot might be used to control trail foot trajectory.