Department of Experimental Psychology, Utrecht University, Utrecht, The Netherlands.
Neuroimage. 2013 Oct 1;79:138-44. doi: 10.1016/j.neuroimage.2013.04.088. Epub 2013 Apr 30.
People vary in their proneness to dominate as a function of their motivation to fulfill their need for reward and social status. Recent research suggests that in humans dominant individuals respond vigilantly to angry faces, whereas non-dominant individuals rapidly signal submission. Dominance motivation has been suggested to reside in asymmetrical patterns of cortical and subcortical processing. The ratio between δ and β band oscillations has been proposed as a proxy for this asymmetry, which we here aimed to map onto individual patterns of the event-related potentials (N170) as well as behavioral responses to facial anger in the context of dominance motivation. Results show that dominance motivation indeed predicts increased δ in the δ/β asymmetry; a pattern that further translates into behavioral vigilance as well as attenuation of the event-related response to angry faces. The present data are interpreted to suggest that dominance motivation is related to increased subcortical and decreased cortical processing, and that this translates into increased vigilance in dominance challenges. This motivational state is further characterized by less detailed processing of facial information as reflected in the attenuation of N170 amplitude.
人们在支配倾向方面存在差异，这是他们满足奖励和社会地位需求的动机的函数。最近的研究表明，在人类中，支配型个体对愤怒的面孔反应敏锐，而非支配型个体则迅速发出屈服的信号。支配动机被认为存在于皮质和皮质下处理的不对称模式中。δ 和 β 波段振荡之间的比率被提议作为这种不对称性的代理，我们旨在将其映射到与支配动机相关的面部愤怒的事件相关电位 (N170) 以及行为反应的个体模式上。结果表明，支配动机确实预测了 δ/β 不对称性中 δ 的增加；这种模式进一步转化为行为警觉，以及对愤怒面孔的事件相关反应的衰减。目前的数据被解释为表明，支配动机与皮质下处理的增加和皮质处理的减少有关，这转化为支配挑战中的警觉性增加。这种动机状态的特征还在于面部信息的处理不那么详细，反映在 N170 幅度的衰减上。
