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ERP analysis. A, Grand average (n = 11 subjects) ERP showing the LPP at Pz with time 0 set to the onset of pictures. B, The scalp topography showing the ERP difference between pleasant and neutral conditions. Here, ERP was averaged within the time interval from 300 to 600 ms. C, The scalp topography showing the ERP difference between unpleasant and neutral conditions. Here, ERP was averaged within the same interval.
