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- W2335764683 abstract "Major depressive disorder (MDD) is associated with behavioral and neurobiological evidences of negative bias in unconscious emotional processing. However, little is known about the time course of this deficit. The current study aimed to explore the unconscious processing of emotional facial expressions in MDD patients by means of event-related potentials (ERPs).The ERP responses to subliminally presented happy/neutral/sad faces were recorded in 26 medication-free patients and 26 healthy controls in a backward masking task. Three ERP components were compared between patients and controls.Detection accuracy was at chance level for both groups, suggesting that the process was performed in the absence of conscious awareness of the emotional stimuli. Robust emotion×group interactions were observed in P1, N170 and P3. Compared with the neutral faces, 1) the patients showed larger P1 for sad and smaller P1 for happy faces; however, the controls showed a completely inverse P1 pattern; 2) the controls exhibited larger N170 in the happy but not in the sad trials, whereas patients had comparable larger N170 amplitudes in sad and happy trials; 3) although both groups exhibited larger P3 for emotional faces, the patients showed a priority for sad trials while the controls showed a priority for happy trials.Our data suggested that negative processing bias exists on the unconscious level in individuals with MDD. The ERP measures indicated that the unconscious emotional processing in MDD patients has a time course of three-stage deflection." @default.
- W2335764683 created "2016-06-24" @default.
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- W2335764683 date "2016-07-01" @default.
- W2335764683 modified "2023-10-17" @default.
- W2335764683 title "Deficits of unconscious emotional processing in patients with major depression: An ERP study" @default.
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- W2335764683 doi "https://doi.org/10.1016/j.jad.2016.03.056" @default.
- W2335764683 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/27057648" @default.
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