The Effect of a Verbal Cognitive Task on Postural Sway Does Not Persist When the Task Is Over.
The Effect of a Verbal Cognitive Task on Postural Sway Does Not Persist When the Task Is Over.
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DOI：
10.3390/s21248428
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发表时间：
2021-12-17
期刊：
影响因子：
--
通讯作者：
Rosso AL
中科院分区：
文献类型：
--
作者：
Bohlke K;Zhu X;Sparto PJ;Redfern MS;Rosano C;Sejdic E;Rosso AL
双任务平衡研究探讨平衡和认知任务之间的干扰。本研究是对加速度平衡指标的描述性分析，以确定言语认知任务是否会影响任务结束后的姿势控制。 52 名健康老年人（75 ± 6 岁，30 名女性）执行站立平衡和认知双重任务。加速度计记录任务之前、期间和之后的运动（背诵字母表中的每隔一个字母）。针对每个任务条件计算了 36 个平衡指标。认知任务对姿势控制的影响由广义线性模型确定。包括前后质心频率、峰值频率和熵率、中后熵率和小波熵以及所有方向的带宽在内的十二个变量在基线和认知任务期间之间表现出显着差异，但在基线和任务后期间之间没有显着差异。这些结果表明，言语认知任务确实改变了平衡，但在任务结束后并没有带来持久的影响。传统的平衡测量，即均方根和归一化路径长度，明显缺乏意义，凸显了使用其他加速度计指标来早期检测平衡问题的潜力。这些对双任务平衡时间动态的新颖见解支持当前的双任务范式，以降低老年人跌倒的风险。
Dual-task balance studies explore interference between balance and cognitive tasks. This study is a descriptive analysis of accelerometry balance metrics to determine if a verbal cognitive task influences postural control after the task ends. Fifty-two healthy older adults (75 ± 6 years old, 30 female) performed standing balance and cognitive dual-tasks. An accelerometer recorded movement from before, during, and after the task (reciting every other letter of the alphabet). Thirty-six balance metrics were calculated for each task condition. The effect of the cognitive task on postural control was determined by a generalized linear model. Twelve variables, including anterior–posterior centroid frequency, peak frequency and entropy rate, medial-later entropy rate and wavelet entropy, and bandwidth in all directions, exhibited significant differences between baseline and cognitive task periods, but not between baseline and post-task periods. These results indicate that the verbal cognitive task did alter balance, but did not bring about persistent effects after the task had ended. Traditional balance measurements, i.e., root mean square and normalized path length, notably lacked significance, highlighting the potential to use other accelerometer metrics for the early detection of balance problems. These novel insights into the temporal dynamics of dual-task balance support current dual-task paradigms to reduce fall risk in older adults.
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