Dual-task repetition alters event-related brain potentials and task performance
Dual-task repetition alters event-related brain potentials and task performance
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DOI：
10.1016/j.clinph.2011.10.001
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发表时间：
2012-06-01
影响因子：
4.7
通讯作者：
Nishihira, Yoshiaki
中科院分区：
文献类型：
--
作者：
Kida, Tetsuo;Kaneda, Takeshi;Nishihira, Yoshiaki
目的：我们研究了调制的事件相关脑电位（ERPs）和短期重复的体感歧视（oddball）任务和视觉运动跟踪task.Methods的并发性能的感觉运动协调的准确性：受试者同时进行视觉跟踪和体感oddball任务。在双任务条件下，受试者同时执行视觉跟踪和体感古怪任务约一小时。在古怪的唯一条件下，他们只执行古怪的任务为同一periods.Results：跟踪性能提高任务重复。在oddball唯一条件下，体感刺激引起的P300的幅度随着任务重复而显著下降，而在双任务条件下，它表现出复杂的变化模式。早期反应的幅度下降，在双任务条件相比，oddball只有condition.Conclusions：动态变化的ERPs和任务绩效与双任务重复支持的想法，即双任务重复产生的变化，在资源分配的自动化刺激处理除了所谓的习惯化。这项研究也提供了证据，使用ERP幅度作为生理指标的功能不同类型的资源。(C)2011年国际临床神经生理学联合会。由Elsevier爱尔兰有限公司出版。保留所有权利。
Objective: We examined the modulation of event-related brain potentials (ERPs) and the accuracy of sensori-motor coordination on short-term repetition of the concurrent performance of a somatosensory discrimination (oddball) task and a visuo-motor tracking task.Methods: The subjects concurrently performed visuomotor tracking and somatosensory oddball tasks. In the dual-task condition, the subjects performed the visuomotor tracking and somatosensory oddball tasks concurrently for about an hour. In the oddball-only condition, they performed just the oddball task for the same period.Results: Tracking performance improved with task repetition. The amplitude of the P300 elicited by somatosensory stimulation in the oddball-only condition decreased significantly with task repetition, whereas in the dual-task condition, it showed a complex pattern of change. The earlier responses were decreased in amplitude in the dual-task condition compared to the oddball-only condition, and gradually decreased with task repetition in both conditions.Conclusions: Dynamic changes in ERPs and task performance with dual-task repetition support the idea that dual-task repetition produces changes in resource allocation following the automation of stimulus processing in addition to so-called habituation.Significance: This study also provides evidence for use of ERP amplitudes as physiological indices of functionally different types of resources. (C) 2011 International Federation of Clinical Neurophysiology. Published by Elsevier Ireland Ltd. All rights reserved.