Motivational significance and cognitive effort elicit different late positive potentials
Motivational significance and cognitive effort elicit different late positive potentials
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DOI：
10.1016/j.clinph.2014.05.030
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发表时间：
2015-02-01
影响因子：
4.7
通讯作者：
Nittono, Hiroshi
中科院分区：
文献类型：
--
作者：
Matsuda, Izumi;Nittono, Hiroshi
目的：情感和认知过程之间的相互作用已被检查使用的事件相关脑电位的晚正电位（LPP）的组成部分。LPP不仅由情感刺激引起，而且也由需要努力的认知加工的非情感刺激引起。然而，目前尚不清楚这些LPP是否等同。本研究将LPP分解成不同的情感内容和认知demands.Methods：参与者（N = 21）进行了四种类型的修订古怪的任务，其中一个情感和五个nonaffective图片。对于一个非情感的图片，不同的认知需求加载：查看显示，更新计数，更新两个不同的项目，或隐藏知识的picture.Results：一个时间-空间的主成分分析揭示了两个主要的子组件的LPP。在两项目更新和隐藏条件下，中央-顶叶LPP主要由情感刺激引起，而枕叶LPP主要由非情感刺激引起。结论：中央-顶叶LPP可能反映了动机性注意加工，而枕叶LPP可能反映了努力性控制加工。分别处理这两个LPP子成分可能有助于检查刺激的情感和认知处理之间的相互作用。(C)2014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: The interaction between affective and cognitive processes has been examined using the late positive potential (LPP) component of the event-related brain potential. The LPP is elicited not only by affective stimuli but also by nonaffective stimuli that require effortful cognitive processing. However, it is unclear whether these LPPs are equivalent. The present study decomposed the LPP into subcomponents that responded differently to affective content and cognitive demands.Methods: The participants (N = 21) performed four types of revised oddball tasks, in which one affective and five nonaffective pictures were presented. For one of the nonaffective pictures, different cognitive demands were loaded: viewing the display, updating a count, updating two different items, or concealing knowledge of the picture.Results: A temporal-spatial principal component analysis revealed two major subcomponents of the LPP. The central-parietal subcomponent was elicited by affective stimuli, whereas the occipital subcomponent was elicited by nonaffective stimuli with cognitive demands in the two-item updating and concealment conditions.Conclusions: The results suggest that the central-parietal dominant LPP may reflect motivated attentional processing, whereas the occipital dominant LPP may reflect effortful controlled processing.Significance: Dealing with these two LPP subcomponents separately may be useful for examining the interaction between affective and cognitive processing of stimuli. (C) 2014 International Federation of Clinical Neurophysiology. Published by Elsevier Ireland Ltd. All rights reserved.