面孔表情加工的結(jié)構(gòu)編碼和特征編碼ERP特點(diǎn)研究
[Abstract]:The early and late processing characteristics of facial expression were analyzed by event-related potential (ERP) technique, and the structural coding and feature coding mechanism of facial expression were discussed. Three kinds of cartoon facial expressions (neutral, pleasant, angry) and three non-facial images were randomly presented, and 14 subjects were asked to perform facial and facial recognition tasks. The electroencephalogram (EEG) was recorded by Neuroscan 64 conductive cap. The early component N170 and late positive component (LPC) induced by different facial expressions were analyzed. The results showed that there were significant differences in N170 between faces and non-faces. At the P7 electrode, the N170 amplitudes induced by faces and non-faces were (-9.15 鹵1.47) 渭 V and (-6.91 鹵1.21) 渭 V, respectively. The amplitude of LPC, induced by different facial expressions was significantly different after stimulation with 350 ~ 550 ms, showing a significant expression effect. At the CZ electrode, the LPC amplitudes induced by neutral, pleasant and angry faces were (6.11 鹵1.79) 渭 V, (7.49 鹵1.31) 渭 V and (9.89 鹵1.77) 渭 V)., respectively.The amplitude of LPC induced by different facial expressions was (6.11 鹵1.79) 渭 V, (7.49 鹵1.31) 渭 V and (9.89 鹵1.77) 渭 V)., respectively. These results show that the early and late processing mechanisms of face recognition are different. The early component N170 reflects the processing of face structure coding, that is, the representation of the whole face profile. The emotional processing of faces is mainly reflected in the late components, and LPC reflects the feature coding processing of faces.
【作者單位】: 燕山大學(xué)電氣工程學(xué)院生物醫(yī)學(xué)工程系;
【基金】:河北省科學(xué)技術(shù)研究與發(fā)展計劃重點(diǎn)研究基礎(chǔ)項目(12966120D) 秦皇島市科學(xué)技術(shù)研究與發(fā)展計劃項目(201401A215)
【分類號】:R338
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