A study of emotional change and physiological response evoked by passive change of facial expression

我们发现了一个新的原理，即面部表情的被动变化会改变感觉或情绪。例如，当受试者被动地睁开双眼时，他们会感到精神焕发，思维运作良好。在这种被动表达五分钟后，心理测试的积极得分比被动表达前增加，消极得分下降。在这种被动表达中，前脑区α和β带的功率以及脑血流量增加。在这一阶段，交感神经活动也成为主导。观察结果似乎与提神的主观感觉一致。

We found a novel principle that the passive change of the facial expression alters feelings or moods. For example, subjects felt refreshed and their mind worked well when both eyes were passively opened. After this passive expression for five minutes, the positive score of psychological tests increased and negative scores decreased compared to those conducted before the passive expression. In the forebrain regions, the powers ofαandβbands as well as brain blood flow increased during this passive expression. Sympathetic activities also became dominant in this phase. The observations seemed to be consistent with the subjective feeling of refreshment.