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首页> 外文期刊>The journals of gerontology.Series A. Biological sciences and medical sciences >Frontal plane instability following rapid voluntary stepping: Effects of age and a concurrent cognitive task
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Frontal plane instability following rapid voluntary stepping: Effects of age and a concurrent cognitive task

机译：快速自愿性踏步后额平面不稳：年龄和并发认知任务的影响

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Background. Quick step execution may prevent falls when balance is lost. Lateral steps often emerge as a consequence of frontal plane instability arising after the first rapid step. In this study, we suggest a new analysis, focusing on the variability of the frontal plane fluctuations of center of pressure (CoP), that is, mediolateral instability, and their changes over time during and immediately following rapid voluntary stepping in older and younger adults in single- and dual-task conditions. This may be useful in understanding age-related alterations in the locomotor control system. Methods. Seventeen older adults, who live independently in the community, and 16 younger adults performed rapid forward voluntary stepping under single- and dual-task conditions. The average mediolateral CoP fluctuations, that is, the average distance the CoP travels from side to side in the frontal plane over time, standard deviation, and the coefficient of variation of mediolateral CoP fluctuation were extracted and calculated from CoP data during and immediately following rapid voluntary stepping using a force plate. Results. We found an age-related increase in the coefficient of variation that represents the variability of frontal plane fluctuations and no significant differences in the average and standard deviations of frontal plane fluctuations. Cognitive task had no influence on measures of frontal plane fluctuations in both age groups. Conclusion. The study showed frontal plane instability during and immediately following rapid stepping in older persons. This may be a factor contributing to lateral balance loss and the large number of lateral falls seen in the older population.
机译：背景。快速执行步骤可以防止失去平衡时跌倒。横向台阶通常是由于在第一快速台阶之后产生的额面不稳定性而出现的。在这项研究中，我们建议进行一项新的分析，重点是老年人和年轻人快速自愿踩踏过程中以及紧随其后的随时间变化的压力中心额表面波动（CoP）的变化，即中外侧不稳定性及其随时间的变化。在单任务和双任务条件下。这可能有助于理解运动控制系统中与年龄有关的变化。方法。在社区中独立生活的17位老年人和16位年轻人在单任务和双任务条件下进行了快速向前的自愿踩踏。从快速过程中和之后快速的CoP数据中提取并计算平均的中外侧CoP波动，即CoP在额平面中从一侧到另一侧随时间推移的平均距离，标准偏差和中间外侧CoP波动的变化系数。使用测力板自愿踩踏。结果。我们发现与年龄相关的变异系数的增加代表了额叶面波动的变化，而额叶面波动的平均和标准偏差没有显着差异。认知任务对两个年龄组的额叶平面波动均无影响。结论。研究表明，在老年人快速踩踏过程中和之后，额面不稳定。这可能是导致侧向平衡损失和老年人口中大量侧向跌倒的因素。

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