Influence of a visuo-spatial, verbal and central executive working memory task on postural control
Influence of a visuo-spatial, verbal and central executive working memory task on postural control
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DOI：
10.1016/s0966-6362(01)00113-8
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发表时间：
2001-10-01
期刊：
影响因子：
2.4
通讯作者：
Allard, F
中科院分区：
文献类型：
--
作者：
Dault, MC;Frank, JS;Allard, F
本研究要求被试在不同的姿势控制挑战(坐姿、肩宽站姿和串列站姿)下完成不同的工作记忆任务(言语任务、两级难度的视觉空间任务和中央执行任务)。当增加WM任务时，姿势摆动的变化以摆动频率的增加和摆动幅度的减少为特征，这表明控制更严格。我们发现不同类型的工作记忆任务之间的姿势控制没有变化。这可能支持一般的能力限制假说，然而，当修改姿势时，工作记忆的成绩没有变化，当修改视觉空间任务的难度时，没有发现姿势摆动的变化。因此，结果似乎表明，WM任务的增加，无论任务类型或任务难度如何，都会迫使中枢神经系统选择更严格的控制策略。(C)2001 Elsevier Science B.V.保留所有权利。
In this study, participants were required to perform different working memory (WM) tasks (a verbal task, a visuo-spatial task with two levels of difficulty and a central executive task) under different challenges to postural control (sitting, shoulder width stance and tandem stance). When a WM task was added, changes in postural sway were characterized by an increase in frequency and decrease in amplitude of sway indicating a tighter control. We found no changes in postural control between the different types of WM tasks. which mi ht support a general capacity limitation hypothesis, However, no changes were found in performance of the WM when postural stance was modified and no changes were found in postural sway, when the difficulty level of the visuo-spatial task was modified. Consequently, the results seem to indicate that the addition of a WM task, regardless of task type or task difficulty, forces the central nervous system to choose a tighter control strategy. (C) 2001 Elsevier Science B.V. All rights reserved.