There have been only a few reports on EEGs and ERPs related to the process of making the emotion. In the present study, we tried to record EEGs and ERPs in nine subjects using three types of pictures of baby's expression, thus an awakening face, a laughing one and a crying one. In analysis of EEGs, we could find a great relation between sensitivity words of "cute - not cute" and enegy change ration of θ wave for laughing face, and it was dominant in frontal lobe as compared with parietal one. We could also find the similar result in standard deviation change ration of θ wave for the laughing one. While, in ERPs, a crying face stimulation evoked higher amplitude than other faces in P500 and P600 components. The amplitude of these components was larger in frontal lobe than parietal one. It suggests that the activity in frontal lobe may be related to the emotion.
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