面孔表情识别事件相关电位的性别效应

目的考察面孔表情加工对应的事件相关电位（event-related potentials，ERP）时空模式的性别差异。方法采用正性、中性、负性三种面孔表情简笔画图片为刺激，31名受试者（男18例，女13例）执行隐含面孔表情识别任务，比较了不同性别的ERP差异波（正性和负性分别减去中性表情对应的ERP波形所得的“清绪波”）及N210（对应于文献中的N170）的异同。结果正性情绪波显著的差异在100-200ms的分布由左侧逐渐过渡到右侧、260-280ms分布于两侧但以左侧为主、360-380ms为前部；负性情绪波显著的差异在360-380ms分布在头皮右侧、500-520ms则在左侧并向后部扩布。女性面孔表情识别左半球的比右半球N210潜伏期明显延长。结论不同性别间对面孔表情的神经加工存在差异，女性N210左半球加工速度迟于右半球。

Gender effect of event-related potentials in a facial expression recognizing task

Objective] To investigate the characteristics of spatiotemporal pattern of gender differences in event-related potentials of face expression processing. Methods] Thirty-one participants (18 male and 13 female) performed an implicit facial recognition task, schematic pictures of three expressions (positive, neutral and negative) as stimuli. The spatiotempral pattern of the emotional wave (waveform differences between either the positive or the negative and the neutral) between genders was investigated. And the differences of face-specific N210 component were compared within each gender. Results] There were significant emotional wave differences between male and female, N210 latency was delayed for left hemisphere to right hemisphere in female(P <0.05). Conclusion] There are gender difference in event-related potentials of face processing to emotional stimuli. This suggests that the facial emotional recognition should consider the gender of the subjects.