|Alternative Title||The cognitive and neural mechanism for the recognition of rapid facial expression|
|赵科; 莫凡; 傅小兰|
Abstract：Rapid facial expression recognition plays a crucial role in the understanding of other people's emotion, as well as social interactions and processes. Based on previous studies, this research investigates the cognitive mechanism of facial expression recognition, using the paradigm of pairwise comparisons. We selected the Nimstim and Ekman databases and 30 subjects (equally prevalent in women and men) were recruited for the experiments.After analyzing the discriminative index of facial expression recognition, the results showed that the recognition of different expressions vary significantly. Through Euclidean cluster analysis, 15 pairs of basic expressions were classified into three categories, among which fear/surprise, sadness/disgust, disgust/anger, fear/sadness, fear/disgust were the most difficult to discriminate, and fear/happy, sadness/happiness, happiness/disgust, happiness/anger were relatively easier to discriminate. Meanwhile, on the basis of these expression categorizations, we compare the differences of facial expression recognition between patients with depression and healthy people. The results showed that patients with depression had lower performance than healthy people in fear/surprise, disgust/anger, surprise/anger,sadness/anger discriminations, whereas they scored higher in the surprise/happiness group, which indicates that recognition disorders of patients with depression mainly showed in relation to negative facial expressions. Finally, we also provide evidence of the brain mechanism for rapid facial expression recognition.Using fMRI experiment,we compared the neural mechanisms for fear and surprise recognition.We found that both expressions evoked activity in the visual cortex, amygdala, fusiform gyrus and other brain areas.Notably,fearrecognition evoked greater activity in the prefrontal cortex whereas surprise corresponded with greater activity in the motor cortex.These findings indicate that two pathways may exist for the brain’s recognition of facial expressions: the prefrontal-amygdala pathway, and the motor cortex-amygdala pathway which is responsible foremotional experiences.
|Keyword||快速表情 辨别力 抑郁 脑机制|
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