title: Neural correlates of the modified Stroop effect in post-traumatic stress disorder: an event-related potential study.
abstract: Previous studies have provided electrophysiological evidence for attentional abnormalities in patients with post-traumatic stress disorder (PTSD). The present study examined the electrophysiological activity of trauma-exposed patients with or without a PTSD during a modified Stroop task. The PTSD group showed a reduced P2 and P3 amplitude relative to the non-PTSD group under both the earthquake-related and earthquake-unrelated words conditions. Importantly, the earthquake-related words elicited a greater P3 amplitude (350-450 ms after stimulus) than did unrelated words in the non-PTSD group, whereas no significant difference was found in the PTSD group. This indicates that PTSD patients had some attention deficits compared with non-PTSD individuals, and that these attention deficits were not just limited to earthquake-related words.
authors.affiliation: Key Laboratory of Cognition and Personality (SWU), Ministry of Education, University of Montreal, Montreal, Quebec, Canada.
authors.forename: Xiaoyi
authors.initials: X
authors.lastname: Chen
authors.forename: Dongtao
authors.initials: D
authors.lastname: Wei
authors.forename: Nicolas
authors.initials: N
authors.lastname: Dupuis-Roy
authors.forename: Xue
authors.initials: X
authors.lastname: Du
authors.forename: Jiang
authors.initials: J
authors.lastname: Qiu
authors.forename: Qinglin
authors.initials: Q
authors.lastname: Zhang
mesh_terms: D000293:Adolescent; D001921:Brain / Q000502:physiology*; D055866:Earthquakes; D005074:Evoked Potentials, Visual / Q000502:physiology*; D005260:Female; D006801:Humans; D008297:Male; D010775:Photic Stimulation / Q000379:methods*; D011930:Reaction Time / Q000502:physiology; D013313:Stress Disorders, Post-Traumatic / Q000175:diagnosis / Q000503:physiopathology* / Q000523:psychology; D057190:Stroop Test; D055815:Young Adult