TY - JOUR
T1 - Information Processing of the Rorschach's Traumatic Content Index in Trauma-exposed Adults
T2 - An Event Related Potential (ERP) Study
AU - Zukerman, Gil
AU - Itzchak, Esther Ben
AU - Fostick, Leah
AU - Armony-Sivan, Rinat
N1 - Publisher Copyright:
© 2017 Elsevier B.V.
PY - 2017/7
Y1 - 2017/7
N2 - PTSD elicits hypervigilance to trauma-related stimuli. Our novel research examined event-related potentials from Blood, Anatomy, and Morbid content derived from the Rorschach's traumatic content index (TCI). Participants included: 16 with PTSD, 24 trauma-exposed without PTSD (non-PTSD), and 16 non-traumatized Controls. P3 oddball paradigms were used with TCI-derived Distractors and neutral Targets/Standards. We predicted larger P3 amplitudes in the context of TCI-related Distractors among trauma-exposed participants. Significant interaction of Group and Distractor type was found for P3 amplitude. PTSD and non-PTSD groups exhibited larger P3 amplitudes from Blood and Anatomy Distractors, and attenuated amplitudes from Morbid; the reverse pattern was found among Controls. A late negative component was observed, denoting a significantly larger area under the curve (AUC) among the PTSD group for Anatomy and Blood Distractors. Larger AUC's were observed for Distractors among the PTSD group, and Targets among Controls. The findings concur with the neurocircuitry model of PTSD and suggest impairment in cerebral suppression of attention to stimuli that may have been perceptually primed with trauma.
AB - PTSD elicits hypervigilance to trauma-related stimuli. Our novel research examined event-related potentials from Blood, Anatomy, and Morbid content derived from the Rorschach's traumatic content index (TCI). Participants included: 16 with PTSD, 24 trauma-exposed without PTSD (non-PTSD), and 16 non-traumatized Controls. P3 oddball paradigms were used with TCI-derived Distractors and neutral Targets/Standards. We predicted larger P3 amplitudes in the context of TCI-related Distractors among trauma-exposed participants. Significant interaction of Group and Distractor type was found for P3 amplitude. PTSD and non-PTSD groups exhibited larger P3 amplitudes from Blood and Anatomy Distractors, and attenuated amplitudes from Morbid; the reverse pattern was found among Controls. A late negative component was observed, denoting a significantly larger area under the curve (AUC) among the PTSD group for Anatomy and Blood Distractors. Larger AUC's were observed for Distractors among the PTSD group, and Targets among Controls. The findings concur with the neurocircuitry model of PTSD and suggest impairment in cerebral suppression of attention to stimuli that may have been perceptually primed with trauma.
KW - Event related potentials
KW - Oddball distractor paradigm
KW - P3
KW - Post traumatic stress disorder
KW - Rorschach inkblot test
KW - Traumatic content index
UR - http://www.scopus.com/inward/record.url?scp=85019639428&partnerID=8YFLogxK
U2 - 10.1016/j.biopsycho.2017.05.002
DO - 10.1016/j.biopsycho.2017.05.002
M3 - ???researchoutput.researchoutputtypes.contributiontojournal.article???
C2 - 28499837
AN - SCOPUS:85019639428
SN - 0301-0511
VL - 127
SP - 108
EP - 122
JO - Biological Psychology
JF - Biological Psychology
ER -