Abstract

Previous research has illustrated that real-time conscious postural control (i.e., reinvestment - shifting from movement automaticity to a more consciously controlled and monitoring of movement) increased with standing task difficulties among healthy older adults. However, such association has not been investigated in the younger population. This study attempted to examine real-time conscious postural control among healthy young adults when performing different standing tasks on a compliant (foam) surface. T3-Fz EEG (electroencephalography) coherence, indicative of real-time conscious postural control, was recorded during the standing tasks (i.e., wide base on foam (WBF), narrow base on foam (NBF) and tandem stance on foam (TAF)). Body sway was also recorded by a motion capture system. Participants’ perceived difficulty on the different standing tasks was evaluated by the Visual Analogue Scale (VAS). Results revealed that while body sway and perceived difficulty increased significantly with task difficulties, T3-Fz EEG coherence did not differ among standing tasks. In addition, no differences of any measures were found between young adults with high and low trait reinvestment propensity. Our findings indicate that young adults do not pose higher real-time conscious postural control when task difficulty increases. We also add support to the existing literature; the between-group effect of trait reinvestment appears to be minimal in real-time.

摘要

先前的研究表明，实时有意识的姿势控制（即再投资 - 从运动自动性转变为更有意识地控制和监测运动）随着健康老年人站立任务的困难而增加。然而，尚未在年轻人群中研究这种关联。本研究试图检查健康年轻人在柔顺（泡沫）表面上执行不同站立任务时的实时有意识姿势控制。T3-Fz EEG（脑电图）相干性，指示实时有意识的姿势控制，在站立任务（即宽底泡沫 (WBF)、窄底泡沫 (NBF) 和串联泡沫站立 (TAF) 期间记录） ）。身体摇摆也被动作捕捉系统记录下来。参与者对不同站立任务的感知难度通过视觉模拟量表 (VAS) 进行评估。结果显示，虽然身体摇摆和感知难度随任务难度显着增加，但 T3-Fz 脑电图连贯性在站立任务之间没有差异。此外，在具有高特征再投资倾向和低特征再投资倾向的年轻人之间没有发现任何措施的差异。我们的研究结果表明，当任务难度增加时，年轻人不会形成更高的实时意识姿势控制。我们还增加了对现有文献的支持；特质再投资的组间效应在实时看来是微乎其微的。T3-Fz EEG 一致性在站立任务之间没有差异。此外，在具有高特征再投资倾向和低特征再投资倾向的年轻人之间没有发现任何措施的差异。我们的研究结果表明，当任务难度增加时，年轻人不会形成更高的实时意识姿势控制。我们还增加了对现有文献的支持；特质再投资的组间效应在实时看来是微乎其微的。T3-Fz EEG 一致性在站立任务之间没有差异。此外，在具有高特征再投资倾向和低特征再投资倾向的年轻人之间没有发现任何措施的差异。我们的研究结果表明，当任务难度增加时，年轻人不会形成更高的实时意识姿势控制。我们还增加了对现有文献的支持；特质再投资的组间效应在实时看来是微乎其微的。