Relations among EEG-alpha asymmetry, BIS/BAS, and dispositional optimism
Relations among EEG-alpha asymmetry, BIS/BAS, and dispositional optimism
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DOI：
10.1016/j.biopsycho.2013.05.016
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发表时间：
2013-09-01
影响因子：
2.6
通讯作者：
Alessandri, Guido
中科院分区：
文献类型：
--
作者：
De Pascalis, Vilfredo;Cozzuto, Giuseppe;Alessandri, Guido
过去的研究一直无法解决额叶半球的活动是否与动机的方向（接近与退缩）或情绪的效价（积极与消极）有关。本研究试图通过使用标准化低分辨率脑电磁断层扫描（sLORETA）来解决这个问题，该扫描提供了独立于记录参考的EEG定位措施。本研究收集了51名大学生的静息脑电、行为激活与抑制系统（BAS和BIS）强度、性格乐观和快乐情绪的自我报告测量。获得了三种皮质激活的测量：（a）常规头皮部位的α不对称性，（B）前部和后部源α不对称性（sLORETA方法），（c）后部与前部δ和θ活动。这两个α不对称措施（传统脑电图和sLORETA）产生了显着的额叶和顶叶不对称相关模式。这两种方法都没有发现休息后额叶三角洲和θ活动人格特质之间的显着关联。较高的BAS与额中回（BA11）的左侧激活更大唯一相关。乐观情绪与左额上回（BA10）和右后扣带皮层（BA31）的较高激活相关。(C)2013年爱思唯尔B。V.保留所有权利。
Past research has been unable to address whether the activity in the frontal hemispheres is related to the direction of motivation (approach versus withdrawal) or valence of emotion (positive versus negative). The present study was an attempt to address this question by using a standardized low-resolution brain electromagnetic tomography (sLORETA) which provides EEG localization measures that are independent of the recording reference. Resting EEG, self-report measures of Behavioral Activation and Inhibition System (BAS and BIS) strength, dispositional optimism and a measure of hedonic tone, were collected from 51 unselected undergraduates. Three measures of cortical activation were obtained: (a) alpha asymmetry at conventional scalp sites, (b) anterior and posterior source alpha asymmetries (sLORETA method), (c) posterior versus frontal delta and theta activity. Both alpha asymmetry measures (conventional EEG and sLORETA) yielded significant frontal and parietal asymmetry correlation patterns. Neither measure identified significant associations between resting posterior versus frontal delta and theta activity personality traits. Higher BAS was uniquely related to greater left-sided activation in the middle frontal gyrus (BA11). Optimism was associated with higher activations in the left-superior frontal gyrus (BA10) and in the right-posterior cingulate cortex (BA31). (C) 2013 Elsevier B. V. All rights reserved.