Jiang Jun, Bailey Kira, Xiao Xiao
Department of Basic Psychology, School of Psychology, Third Military Medical University, Chongqing, China.
Department of Psychology, Ohio Wesleyan University, Delaware, OH, United States.
Front Hum Neurosci. 2018 May 3;12:175. doi: 10.3389/fnhum.2018.00175. eCollection 2018.
Past attempts to characterize the neural mechanisms of affective priming have conceptualized it in terms of classic cognitive conflict, but have not examined the neural oscillatory mechanisms of subliminal affective priming. Using behavioral and electroencephalogram (EEG) time frequency (TF) analysis, the current study examines the oscillatory dynamics of unconsciously triggered conflict in an emotional facial expressions version of the masked affective priming task. The results demonstrate that the power dynamics of conflict are characterized by increased midfrontal theta activity and suppressed parieto-occipital alpha activity. Across-subject and within-trial correlation analyses further confirmed this pattern. Phase synchrony and Granger causality analyses (GCAs) revealed that the fronto-parietal network was involved in unconscious conflict detection and resolution. Our findings support a response conflict account of affective priming, and reveal the role of the fronto-parietal network in unconscious conflict control.
过去试图描述情感启动神经机制的研究,都是根据经典认知冲突来对其进行概念化,但尚未研究阈下情感启动的神经振荡机制。本研究采用行为学和脑电图(EEG)时频(TF)分析方法,在情绪面部表情版的掩蔽情感启动任务中,考察无意识引发冲突的振荡动力学。结果表明,冲突的功率动力学特征是额中部θ活动增强和顶枕部α活动受到抑制。跨被试和试内相关分析进一步证实了这一模式。相位同步和格兰杰因果分析(GCA)表明,额顶叶网络参与了无意识冲突检测和解决。我们的研究结果支持情感启动的反应冲突观点,并揭示了额顶叶网络在无意识冲突控制中的作用。