title: Behavioral and neural correlates of self-referential processing deficits in bipolar disorder.
abstract: Self-referential processing is a core component of social cognition. However, few studies have focused on whether self-referential processing deficits present in bipolar disorder. The current study combined a high-time-resolution event-related potential (ERP) technique with the self-referential memory (SRM) task to evaluate self-referential processing in 23 bipolar patients and 27 healthy controls. All subjects showed a reliable SRM effect, but the bipolar group had poorer recognition scores for the self- and other-referential conditions. The bipolar group presented with smaller voltages in both the self- and other-referential conditions for the N1 (150-220 ms) and the P2 components (130-320 ms) but larger voltages in the positive slow wave (600-1600 ms) component. Larger P3 amplitudes were elicited in the self-referential condition compared with the other-referential condition in controls but not in bipolar patients. Additionally, non-psychotic bipolar patients had a comparative normal SRM effect which was abolished in psychotic bipolar patients; non-psychotic bipolar patients had larger amplitudes of the positive slow wave than the normal controls, whereas it was not differed between psychotic bipolar patients and the healthy subjects. The present study suggests that self- and other-referential processing is impaired in bipolar patients and the deficits may be more pronounced in psychotic bipolar patients.
authors.affiliation: Center for Psychiatric Research, Beijing Huilongguan Hospital, Beijing 100096, China.
authors.forename: Yanli
authors.initials: Y
authors.lastname: Zhao
authors.affiliation: School of Psychology, Liaoning Normal University, Dalian 116029, China.
authors.forename: Wenbo
authors.initials: W
authors.lastname: Luo
authors.affiliation: Center for Psychiatric Research, Beijing Huilongguan Hospital, Beijing 100096, China.
authors.forename: Jingxu
authors.initials: J
authors.lastname: Chen
authors.affiliation: Institute of Affective and Social Neuroscience, Shenzhen University, Shenzhen 518060, China.
authors.forename: Dandan
authors.initials: D
authors.lastname: Zhang
authors.affiliation: Center for Psychiatric Research, Beijing Huilongguan Hospital, Beijing 100096, China.
authors.forename: Ligang
authors.initials: L
authors.lastname: Zhang
authors.affiliation: Center for Psychiatric Research, Beijing Huilongguan Hospital, Beijing 100096, China.
authors.forename: Chunling
authors.initials: C
authors.lastname: Xiao
authors.affiliation: Center for Psychiatric Research, Beijing Huilongguan Hospital, Beijing 100096, China.
authors.forename: Fengmei
authors.initials: F
authors.lastname: Fan
authors.affiliation: Center for Psychiatric Research, Beijing Huilongguan Hospital, Beijing 100096, China.
authors.forename: Xiaolin
authors.initials: X
authors.lastname: Zhu
authors.affiliation: Center for Psychiatric Research, Beijing Huilongguan Hospital, Beijing 100096, China.
authors.forename: Hongzhen
authors.initials: H
authors.lastname: Fan
authors.affiliation: Center for Psychiatric Research, Beijing Huilongguan Hospital, Beijing 100096, China.
authors.forename: Shuping
authors.initials: S
authors.lastname: Tan
mesh_terms: D000328:Adult; D001714:Bipolar Disorder / Q000503:physiopathology*; D001921:Brain / Q000473:pathology / Q000503:physiopathology*; D016022:Case-Control Studies; D003710:Demography; D005071:Evoked Potentials; D005260:Female; D006801:Humans; D007600:Judgment; D008297:Male; D012649:Self Concept; D012919:Social Behavior