Abstract
Participants with Posttraumatic Stress Disorder (PTSD) may exhibit altered attention to salient/arousing stimuli. Neural indices of attention are reflected by the P3 event related potential (ERP), elicited by the auditory oddball task. Reduced P3 amplitudes, longer P3 latencies, and performance decrements in response to deviant stimuli have previously been shown in PTSD, suggesting deficits in attention and stimulus discrimination. This study assessed differences in P3 features to deviant, novel, and trauma-related (e.g. gunshots, screams) sounds in individuals with PTSD and across PTSD subtypes, and their relation to symptom profiles.
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