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dc.contributor.authorKlimova, A
dc.contributor.authorBryant, RA
dc.contributor.authorWilliams, LM
dc.contributor.authorFelmingham, KL
dc.date.accessioned2021-02-04T00:40:42Z
dc.date.available2021-02-04T00:40:42Z
dc.date.issued2013-01-01
dc.identifierpii: 20430
dc.identifier.citationKlimova, A., Bryant, R. A., Williams, L. M. & Felmingham, K. L. (2013). Dysregulation in cortical reactivity to emotional faces in PTSD patients with high dissociation symptoms. EUROPEAN JOURNAL OF PSYCHOTRAUMATOLOGY, 4 (SUPPL.), https://doi.org/10.3402/ejpt.v4i0.20430.
dc.identifier.issn2000-8198
dc.identifier.urihttp://hdl.handle.net/11343/259163
dc.description.abstractBACKGROUND: Predominant dissociation in posttraumatic stress disorder (PTSD) is characterized by restricted affective responses to positive stimuli. To date, no studies have examined neural responses to a range of emotional expressions in PTSD with high dissociative symptoms. OBJECTIVE: This study tested the hypothesis that PTSD patients with high dissociative symptoms will display increased event-related potential (ERP) amplitudes in early components (N1, P1) to threatening faces (angry, fearful), and reduced later ERP amplitudes (Vertex Positive Potential (VPP), P3) to happy faces compared to PTSD patients with low dissociative symptoms. METHODS: Thirty-nine civilians with PTSD were classified as high dissociative (n=16) or low dissociative (n=23) according to their responses on the Clinician Administered Dissociative States Scale. ERPs were recorded, whilst participants viewed emotional (happy, angry, fear) and neutral facial expressions in a passive viewing task. RESULTS: High dissociative PTSD patients displayed significantly increased N120 amplitude to the majority of facial expressions (neutral, happy, and angry) compared to low dissociative PTSD patients under conscious and preconscious conditions. The high dissociative PTSD group had significantly reduced VPP amplitude to happy faces in the conscious condition. CONCLUSION: High dissociative PTSD patients displayed increased early (preconscious) cortical responses to emotional stimuli, and specific reductions to happy facial expressions in later (conscious), face-specific components compared to low dissociative PTSD patients. Dissociation in PTSD may act to increase initial pre-attentive processing of affective stimuli, and specifically reduce cortical reactivity to happy faces when consciously processing these stimuli.
dc.languageEnglish
dc.publisherTAYLOR & FRANCIS LTD
dc.rights.urihttps://creativecommons.org/licenses/by/4.0
dc.titleDysregulation in cortical reactivity to emotional faces in PTSD patients with high dissociation symptoms
dc.typeJournal Article
dc.identifier.doi10.3402/ejpt.v4i0.20430
melbourne.affiliation.departmentPsychiatry
melbourne.affiliation.departmentMelbourne School of Psychological Sciences
melbourne.affiliation.facultyMedicine, Dentistry & Health Sciences
melbourne.source.titleEuropean Journal of Psychotraumatology
melbourne.source.volume4
melbourne.source.issueSUPPL.
dc.rights.licenseCC BY
melbourne.elementsid1202890
melbourne.contributor.authorBryant, Richard
melbourne.contributor.authorFelmingham, Kim
dc.identifier.eissn2000-8066
melbourne.accessrightsOpen Access


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