Auditory stimulus has a larger effect on anticipatory postural adjustments in older than young adults during choice step reaction
Auditory stimulus has a larger effect on anticipatory postural adjustments in older than young adults during choice step reaction
复制标题
在选择步骤反应过程中，听觉刺激对老年人的预期姿势调整的影响大于年轻人
DOI：
10.1007/s00421-017-3727-5
复制
发表时间：
2017
影响因子：
3
通讯作者：
Nojima Ippei
中科院分区：
文献类型：
--
作者：
Watanabe Tatsunori;Saito Kotaro;Ishida Kazuto;Tanabe Shigeo;Nojima Ippei
目的比较听觉刺激对年轻人和老年人选择步反应中预期体位调整的影响。方法16名年轻人和19名老年人在箭头的视觉指令刺激下向前走。我们使用了一个选择反应时间（CRT）任务和一个西蒙任务，包括一致和不一致的条件。呈现箭头的方向和空间位置在一致条件下匹配，而在不一致条件下不匹配。AS与视觉刺激同时随机呈现。不正确的体重转移前解除脚，称为APA误差，步进误差，时间参数和APA振幅进行了分析。结果在所有任务条件下，老年组的APA错误率均高于无AS组，而只有在不一致条件下，青年组的APA错误率高于无AS组。在不一致条件下，老年组的步进错误率也增加了。两组患者的反应速度都更快。在不一致条件下，两组的错误APA试验的APA振幅都随着AS的增加而增大，而且这种影响在老年组中表现得更大。结论在老年人选择步反应中，AS对APAs的影响更大。在存在不一致的视觉信息时，这种影响变得更大，不仅可能诱发APA错误，还可能诱发步进错误。
PurposeThe study aim was to compare the influence of an auditory stimulus (AS) on anticipatory postural adjustments (APAs) between young and older adults during a choice step reaction.MethodsSixteen young and 19 older adults stepped forward in response to a visual imperative stimulus of an arrow. We used a choice reaction time (CRT) task and a Simon task which consisted of congruent and incongruent conditions. The direction of the presented arrow and its spatial location matched in the congruent condition while they did not in the incongruent condition. The AS was presented randomly and simultaneously with the visual stimulus. Incorrect weight shifts before lifting off the foot, termed APA errors, stepping errors, temporal parameters, and APA amplitudes were analyzed.ResultsThe APA error rate was higher in trials with than without AS in all task conditions for the older group, while this increase occurred only in the incongruent condition for the young group. The stepping error rate was also increased in the presence of AS in the incongruent condition for the older group. Reaction times were faster with AS in both groups. The APA amplitude of erroneous APA trials became larger with AS in the incongruent condition for both groups, and this effect appeared greater for the older group.ConclusionsThe effect of AS on APAs is larger in the elderly during a choice step reaction. In the presence of incongruent visual information, this effect becomes even greater, potentially inducing not only APA errors but also stepping errors.