The influence of a concurrent cognitive task on the compensatory stepping response to a perturbation in balance-impaired and healthy elders
The influence of a concurrent cognitive task on the compensatory stepping response to a perturbation in balance-impaired and healthy elders
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DOI：
10.1016/s0966-6362(01)00163-1
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发表时间：
2002-02-01
期刊：
影响因子：
2.4
通讯作者：
Shumway-Cook, A
中科院分区：
文献类型：
--
作者：
Brauer, SG;Woollacott, M;Shumway-Cook, A
本研究探讨同步认知任务对平衡受损老人补偿性踏步反应的影响，以及踏步反应的注意需求。在单任务（仅姿势恢复）和双任务（姿势恢复和声音反应时任务）的情况下，对15名年轻人、15名健康老年人和13名平衡受损老年人进行了向前恢复步骤的动力学、运动学和神经肌肉测量。结果显示，反应时间较长，在所有的科目时，同时进行补偿步骤，他们更长的一个步骤比一个到位的反应和更长的平衡受损的老年人与年轻人相比。一个有趣的发现是，后一组差异可能与两项任务之间的优先级有关，而不是注意力需求，因为老年人在反应时间之前完成了这一步骤，而年轻人可以同时完成这两项任务。几个步骤的特点之间的差异被发现的任务，最显着的是延迟的潜伏期和降低幅度的早期自动姿势反应的健康和平衡受损的老年人与并发任务。(C)2002 Elsevier Science B.V.保留所有权利。
This study investigated the influence of a concurrent cognitive task on the compensatory stepping response in balance-impaired elders and the attentional demand of the stepping response. Kinetic, kinematic and neuromuscular measures of a forward recovery step were investigated in 15 young adults, 15 healthy elders and 13 balance-impaired elders in a single task (postural recovery only) and dual task (postural recovery and vocal reaction time task) situation. Results revealed that reaction times were longer in all subjects when performed concurrently with a compensatory step, they were longer for a step than an in-place response and longer for balance-impaired older adults compared with young adults. An interesting finding was that the latter group difference may be related to prioritization between the two tasks rather than attentional demand, as the older adults completed the step before the reaction time, whereas the young adults could perform both concurrently. Few differences in step characteristics were found between tasks, with the most notable being a delayed latency and reduced magnitude of the early automatic postural response in healthy and balance-impaired elders with a concurrent task. (C) 2002 Elsevier Science B.V. All rights reserved.