The purpose of this study was to explore the mechanism of anticipatory control of gait in relation to the perception of an obstacle. Typically developing (TD) children (4-7 years of age) and children with Down syndrome (5-6 years of age) walked and stepped over obstacles of two different heights-a "subtle" obstacle that was placed at a very low distance from the floor (1% of total body height) and an "obvious" obstacle that was placed at a much higher distance from the floor (15% of total body height). Spatial and temporal measures of the gait cycle were analyzed. TD children showed increased variability in pre-obstacle step lengths only in response to the higher obstacle. Children with DS showed a decrease in variability in response to the higher obstacle and marked qualitative changes in their gait cycle. Both groups of children were able to scale toe clearance with obstacle height. These results show that TD young children can make task-specific anticipatory adjustments by modulating step length and toe clearance. Children with DS show appropriate scaling of toe clearance and are beginning to show the emergence of anticipatory responses under specific environmental conditions.

译文

:本研究的目的是探讨与障碍物感知有关的预期步态控制机制。通常发育中的(TD)儿童(4-7岁)和患有唐氏综合症的儿童(5-6岁)走路并跨过两个不同高度的障碍物-距离很近的“微妙”障碍物距离地板(占车身总高度的1%)和“明显的”障碍物放置在距离地板更高的距离(占车身总高度的15%)的位置。分析了步态周期的时空测量。 TD儿童仅在对较高障碍物有反应的情况下,障碍物前步长的变异性增加。 DS儿童表现出对较高障碍物的反应的可变性降低,并且步态周期有明显的质性变化。两组儿童都能够根据障碍物的高度确定脚趾的间隙。这些结果表明,TD幼儿可以通过调节步长和脚趾间隙来进行任务特定的预期性调整。患有DS的儿童表现出适当的脚趾清除比例,并且开始显示在特​​定环境条件下预期反应的出现。

+1
+2
100研值 100研值 ¥99课程
检索文献一次
下载文献一次

去下载>

成功解锁2个技能,为你点赞

《SCI写作十大必备语法》
解决你的SCI语法难题!

技能熟练度+1

视频课《玩转文献检索》
让你成为检索达人!

恭喜完成新手挑战

手机微信扫一扫,添加好友领取

免费领《Endnote文献管理工具+教程》

微信扫码, 免费领取

手机登录

获取验证码
登录