视觉和听觉短期记忆任务对姿势摆动的时空动态及变异性的影响。
Effects of visual and auditory short-term memory tasks on the spatiotemporal dynamics and variability of postural sway.
作者信息
Riley M A, Baker A A, Schmit J M, Weaver E
机构信息
Department of Psychology, ML 0376, 429 Dyer Hall, University of Cincinnati, Cincinnati, OH 45221-0376, USA.
出版信息
J Mot Behav. 2005 Jul;37(4):311-24. doi: 10.3200/JMBR.37.4.311-324.
The authors measured postural sway while participants (N = 20 in each experiment) stood on a rigid or a compliant surface, with their eyes open or closed, and while they did or did not perform a short-term memory (STM) task. In Experiment 1, the STM stimuli were presented visually; in Experiment 2, the stimuli were presented auditorily. In both experiments, fine-scaled, mediolateral postural-sway variability decreased as the cognitive load imposed by the STM task increased. That effect was independent of support surface and vision manipulations. The spatiotemporal profile of postural sway was affected by both visual and auditory STM tasks, but to a greater degree by the auditory task. The authors discuss implications of the results for theories and models of postural control.
作者测量了参与者（每个实验20人）在睁眼或闭眼状态下，站在刚性或柔性表面上，以及执行或不执行短期记忆（STM）任务时的姿势摆动情况。在实验1中，STM刺激以视觉方式呈现；在实验2中，刺激以听觉方式呈现。在两个实验中，随着STM任务施加的认知负荷增加，精细尺度的、内外侧姿势摆动变异性均降低。该效应与支撑表面和视觉操作无关。姿势摆动的时空特征受到视觉和听觉STM任务的影响，但听觉任务的影响更大。作者讨论了研究结果对姿势控制理论和模型的意义。
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