ON THE COGNITIVE PENETRABILITY OF POSTURE CONTROL
ON THE COGNITIVE PENETRABILITY OF POSTURE CONTROL
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DOI：
10.1080/03610739308253919
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发表时间：
1993-01-01
影响因子：
1.8
通讯作者：
FLEURY, M
中科院分区：
文献类型：
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作者：
TEASDALE, N;BARD, C;FLEURY, M
姿势的摆动随着年龄的增长而增加。与姿势摆动相关的稳定性降低通常与视觉、前庭和本体感觉系统的外周敏感性降低有关。我们研究了维持平衡所必需的微姿势调整是否也需要一些认知处理。年轻的和年长的受试者被要求在力量平台上保持直立姿势的同时进行听觉反应时间任务。在四种视觉/表面条件下，当受试者处于中心位置或处于不太稳定的偏心姿势时，随机呈现听觉刺激。如果姿势调整需要一些认知处理，则脚部压力中心(COP)的偏心位置比COP的稳定位置需要更多的注意，因为当识别出偏心位置时，随后需要选择、编程和执行校正反应。改变视觉和表面条件，以确定当可用感觉信息减少时，是否需要为姿势任务分配额外的注意资源。结果表明，随着感觉信息的减少，老年人的姿势任务变得越来越困难，需要更多的注意力能力(以反应时间的增加为指标)。
Postural sway increases with age. The decreased stability associated with postural sway often has been related to the reduced peripheral sensibility in the visual, vestibular, and proprioceptive systems. We examined whether the micropostural adjustments necessary for maintaining balance also require some cognitive processing. Young and older subjects were submitted to an auditory reaction time task while maintaining an upright posture on a force platform. The auditory stimuli were presented randomly when subjects were in a central or in an eccentric less stable postural position in four conditions of vision/surface. If the postural adjustments require some cognitive processing, a more eccentric position of the center of foot pressure (COP) would require more attention than a stable position of the COP because when an eccentric position is identified, a corrective response subsequently needs to be selected, programmed, and executed. The visual and surface conditions were altered to determine if additional attentional resources need to be allocated to the postural task when there is a reduction of the sensory information available. Results showed that as the sensory information decreased, the postural task became increasingly difficult for the elderly and required more of their attentional capacity (as indexed by increases in reaction time).