To observe different neural mechanisms revealed by features of N170, VPP and LPP during real face (RF) and cartoon face (CF) recognition, 27 subjects were asked to finish face recognition tasks with four kinds of stimuli while EEG was recorded. The amplitudes of NI70, VPP and LPP of faces were larger than those of cars, while the latency of N170 of faces was shorter than that of cars; the amplitudes of N170 and LPP of real pictures were larger than those of cartoon pictures, while the N170 latency of real pictures was shorter than that of cartoon pictures; the amplitude of N170 showed right hemisphere dominance in face recognition; the latencies of N170 and VPP showed that it took shorter time tor temale subjects to recognize faces than the males do; the latency of N170 of CF was significantly longer than that of RF, the average amplitudes of LPP (350-450 ms) in occipital and temporal region of RF were larger than those of CF. CF processing showed lateralization phenomenon, mainly in the right occipital and right parietal regions, but RF processing mainly in the bilateral parietal region. There is no significant difference in processing strength between RF and CF during the early structural encoding stage of face recognition,while RF shows a small advantage in speed; the ERP difference between RF and CF is significant during the late stage of face processing in occipital and temporal regions. There is right hemisphere dominance during the late stage of CF processing.%为探究卡通面孔(cartoon face,CF)与真实面孔(real face,RF)加工的神经机制差异,使用四种图片进行面孔识别任务,以面孔加工相关的ERP成分N170、VPP和LPP为研究指标.对27名大学生进行ERP实验。结果显示,面孔图片N170,VPP与LPP波幅均显著高于汽车图片,N170潜伏期短于后者;真实图片N170与LPP波幅显著高于卡通图片,N170潜伏期显著短于后者;N170存在右半球强度优势;女性N170和VPP潜伏期均短于男性。RF的N170潜伏期显著短于CF,RF的LPP(350~450ms)平均波幅在枕区和颞区显著大于CF;CF晚期加工表现出偏侧化,主要在右侧顶枕区,而RF加工主要在双侧顶枕区。得出结论:在早期结构编码阶段,RF与CF加工强度无差异,RF速度略有优势;在晚期加工阶段,RF在枕区与颞区存在加工强度优势;CF晚期加工显示右半球偏侧化。
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