Objective and Methods: To investigate the neural correlates of earthquake-related stimuli among earthquake-exposed survivors, 13 earthquake-exposed undergraduates without posttraumatic stress disorder (PTSD) and 13 matched controls completed a study-test task during which event-related potentials were recorded synchronously. Results: The earthquake-exposed group exhibited stronger P2, P300 and late positive component amplitudes to earthquake-related stimuli compared with the control group on the anterior scalp during recognition memory processing. In addition, earthquake-related stimuli elicited enhanced positivity compared with neutral stimuli in the earthquake-exposed group. Conclusion: The results indicate that earthquake-exposed subjects demonstrate recognition memory bias toward threatening stimuli. Even though both groups showed no PTSD symptoms, potential threat cues or stimuli associated with a traumatic event may trigger traumatic memories in this group.

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