Lee Yunju, Goyal Nikita, Aruin Alexander S
Department of Physical Therapy, University of Illinois at Chicago, 1919 W. Taylor St., Chicago, IL, 60612, USA.
Exp Brain Res. 2018 Feb;236(2):399-407. doi: 10.1007/s00221-017-5135-9. Epub 2017 Nov 21.
The purpose of the study was to investigate the individual and combined effects of applying light finger touch and performing a cognitive task on postural sway. Fourteen healthy young individuals stood on the force platform with light finger touch contact applied to an external stable structure and without finger touch. Both tasks were performed with and without a cognitive task (counting backward from a randomly chosen three-digit number). The center of pressure excursion and velocity as well as sway area were calculated. Participants demonstrated significantly smaller postural sway in the presence of a finger touch contact (p < 0.05), while postural sway was increased during the performance of the cognitive task (p < 0.05). When two tasks were performed simultaneously, body sway increased as compared to standing with light touch only (p < 0.05) and decreased when compared to standing and performing the cognitive task only (p < 0.05). This suggests that a positive effect of finger touch on body sway could be diminished by the simultaneous performance of a cognitive task. The outcome provides a foundation for future studies of the individual and combined effects of light finger touch and cognitive tasks on postural control.
本研究的目的是调查轻触手指和执行认知任务对姿势摆动的个体及综合影响。14名健康的年轻人站在测力平台上，一种情况是手指轻触外部稳定结构，另一种情况是不进行手指轻触。两项任务均在有和没有认知任务（从随机选择的三位数开始倒数）的情况下进行。计算压力中心偏移、速度以及摆动面积。参与者在有手指轻触时姿势摆动明显更小（p < 0.05），而在执行认知任务时姿势摆动增加（p < 0.05）。当两项任务同时进行时，与仅进行轻触站立相比身体摆动增加（p < 0.05），与仅站立并执行认知任务相比身体摆动减少（p < 0.05）。这表明同时执行认知任务可能会削弱手指轻触对身体摆动的积极影响。该结果为未来研究手指轻触和认知任务对姿势控制的个体及综合影响奠定了基础。
