ERP waveforms for a representative occipito-temporal sensor (EGI#167, scalp position marked by white dot) and difference scalp maps [erotic – portrait images] illustrate the EPN component across experimental conditions.
(A) Phase 1 illustrates the prototypical ERP signature of emotion processing. Erotic images elicited a larger posterior negativity than portrait pictures. (B) Consistent with the self-completion hypothesis, edited pictures from the erotic category elicited an emotional modulation of the EPN. (C) The effect was dependent on newly-formed memory representations as partial pictures which had not been seen in their original form did not elicit an emotional modulation as indicated by the EPN.