Paulmann Silke, Pell Marc D
University of Essex, Colchester CO4 3SQ, UK.
Neuroreport. 2009 Dec 9;20(18):1603-8. doi: 10.1097/WNR.0b013e3283320e3f.
To further specify the time course of (emotional) face processing, this study compared event-related potentials elicited by faces conveying prototypical basic emotions, nonprototypical affective expressions (grimaces), and neutral faces. Results showed that prototypical and nonprototypical facial expressions could each be differentiated from neutral expressions in three different event-related potential component amplitudes (P200, early negativity, and N400), which are believed to index distinct processing stages in facial expression decoding. On the basis of the distribution of effects, our results suggest that early processing is mediated by shared neural generators for prototypical and nonprototypical facial expressions; however, later processing stages seem to engage distinct subsystems for the three facial expression types investigated according to their emotionality and meaning status.
为了进一步明确（情感）面部处理的时间进程，本研究比较了由传达典型基本情绪、非典型情感表情（鬼脸）和中性表情的面孔所引发的事件相关电位。结果表明，典型和非典型面部表情在三种不同的事件相关电位成分幅度（P200、早期负波和N400）上均能与中性表情区分开来，这些成分被认为是面部表情解码中不同处理阶段的指标。基于效应的分布，我们的结果表明，早期处理由典型和非典型面部表情的共享神经发生器介导；然而，后期处理阶段似乎根据所研究的三种面部表情类型的情感性和意义状态，涉及不同的子系统。
