Gable Philip A, Mechin Nicole C, Hicks Joshua A, Adams David L
Department of Psychology, The University of Alabama, Tuscaloosa, AL, USA,
Department of Psychology, The University of Alabama, Tuscaloosa, AL, USA.
Soc Cogn Affect Neurosci. 2015 Oct;10(10):1310-5. doi: 10.1093/scan/nsv017. Epub 2015 Feb 11.
Approach, avoidance and the supervisory control system are fundamental to human behavior. Much past research has examined the neurophysiological models relating trait approach and avoidance. Using measures of electroencephalographic (EEG) frontal asymmetry, trait approach has been associated with greater left-frontal activity and trait avoidance has been associated with greater right-frontal activity. However, traits related to the supervisory control system have not been previously associated with frontal asymmetry. The current study sought to test whether trait positive urgency, measuring the tendency towards rash action in response to extreme positive emotional states, would relate to frontal alpha asymmetry. One hundred twenty-six individuals completed a measure of positive urgency and resting EEG recordings. Greater positive urgency was associated with greater relative left-frontal EEG activity. Source localization revealed that this relationship appeared to originate from reduced right-frontal activity in the inferior frontal gyrus. These results clarify that the link between frontal asymmetry and positive urgency is related to reduced right-frontal activity. Reduced right-frontal activity may be a potential neurobiological trait related to the supervisory control system.
趋近、回避与监督控制系统是人类行为的基础。过去许多研究都考察了与特质趋近和回避相关的神经生理模型。通过脑电图（EEG）额叶不对称性测量，特质趋近与左额叶活动增强相关，特质回避与右额叶活动增强相关。然而，与监督控制系统相关的特质此前并未与额叶不对称性联系起来。当前研究试图检验特质积极紧迫性（测量个体在极端积极情绪状态下采取鲁莽行动的倾向）是否与额叶阿尔法不对称性有关。126名个体完成了一项积极紧迫性测量以及静息EEG记录。更高的积极紧迫性与相对更强的左额叶EEG活动相关。源定位显示，这种关系似乎源于额下回右额叶活动的减少。这些结果表明，额叶不对称性与积极紧迫性之间的联系与右额叶活动减少有关。右额叶活动减少可能是与监督控制系统相关的一种潜在神经生物学特质。
