Our purpose was to investigate the cortical information processing of autobiographical fact violation (AFV) in self-referential questions. We expected that AFV in a self-referential question would evoke a characteristic pattern of neural synchrony and event-related potentials (ERPs). Averaged ERP and event-related synchronization in the gamma band were analyzed to observe differences between the processing of questions with and without AFV. Significant differences in ERP were found in the posterior area at 290–435 ms (N400) and in the frontal area at 520–800 ms (late positive component, LPC). Interestingly, differentiation of the gamma-band synchrony was found in two temporal periods, (255–365 and 525–585 ms), which are comparable to the periods of significant ERP differences. The two periods are interpreted to be devoted to the processing of semantic and self-referential information, respectively. These findings may imply that the decision-making involved in answering self-referential questions is enabled by the integration of semantic and autobiographical information processing.
Bibliographical noteFunding Information:
This study was supported by a National Research Foundation of Korea (NRF) grant funded by the Korean government (MSIP) (No. 2014R1A2A2A04003858) and supported by a grant to CABMC (Control of Animal Brain using MEMS Chip) funded by the Defense Acquisition Program Administration of South Korea (UD140069ID).
© 2017 Elsevier B.V.
All Science Journal Classification (ASJC) codes
- Molecular Biology
- Clinical Neurology
- Developmental Biology