...
首页> 外文期刊>Gait & posture >Dynamic stability control during volitional stepping: A focus on the restabilisation phase at movement termination
【24h】

Dynamic stability control during volitional stepping: A focus on the restabilisation phase at movement termination

机译:自愿踏步过程中的动态稳定性控制:着重于运动终止时的稳定阶段

获取原文
获取原文并翻译 | 示例
           

摘要

This work sought to advance the understanding of dynamic stability control during stepping. The specific intention was to better understand the control of the centre of mass during voluntary stepping, by characterizing its trajectory and intertrial variability. Young participants (n= 10) performed five different stepping tasks to vary the challenge to COM control: (1) preferred step, (2) long step, (3) wide step, (4) long and wide step and (5) rapid step. The trajectory of the total body COM during the restabilisation phase was assessed by quantifying the magnitude of incongruity between the peak and final COM position. The intertrial variability of incongruity and the extent to which incongruity was reduced with trial repetition were also evaluated. Interestingly, incongruity was typical during preferred stepping, with a strong bias toward overshoot. In the frontal plane, the magnitude of incongruity and the incidence of overshoot were greater in trials with increased step width. The variability of incongruity did not vary by condition nor was there evidence of adaptive changes. Together, these results suggest that overshoots may represent a strategy linked to gait initiation or to the simplification of reactive control during the restabilisation phase. Further insight into these mechanisms will be gained by examining the kinetic determinants of dynamic stability control.
机译:这项工作试图增进对步进过程中动态稳定性控制的理解。具体的意图是通过表征其运动轨迹和心间变异性,更好地了解在自愿踩踏过程中对质心的控制。年轻的参与者(n = 10)执行了五项不同的步进任务来改变对COM控制的挑战:(1)首选步骤,(2)长步,(3)宽步,(4)长而宽的步,以及(5)快速步。通过量化峰值与最终COM位置之间的不一致程度来评估重新稳定化阶段的整个COM的轨迹。还评估了不一致性的间质变异性以及通过反复试验减少不一致性的程度。有趣的是,在首选的踩踏过程中,不协调性是典型的,对超调有强烈的偏见。在额面,步长增加的试验中,不一致的程度和过冲的发生率更大。不一致性的可变性没有因条件而变化,也没有适应性变化的证据。总之,这些结果表明,过冲可能代表一种与步态启动或在稳定阶段的反应控制简化有关的策略。通过检查动态稳定性控制的动力学决定因素,可以进一步了解这些机制。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号