Electrocortical Reactivity to Emotional Faces in Youth of Depressed Mothers: The Moderating Role of Emotion Regulation Styles.

Children of depressed mothers are at significantly high risk (HR) for developing major depressive disorder (MDD) compared to their low risk (LR) counterparts. Evidence shows that HR youth exhibit a reduced late positive potential (LPP), an electroencephalogram (EEG) marker of emotional reactivity, in response to social-emotional stimuli. However, it remains unknown how emotion regulation (ER) styles may impact LPP responses in HR and LR offspring. The current study sought to examine the interplay of ER strategies (i.e., rumination, cognitive reappraisal, and suppression) and maternal history of MDD in association with LPP responses to emotional stimuli among youth. Participants included 112 mother-child dyads (child age range 9-16 years) participating in a larger study on the intergenerational transmission of depression. Mothers either had a history of MDD (n = 67) or no history of psychopathology (n = 45). Youth completed an emotional face matching task while EEG was recorded to measure the LPP. Participants completed self-report measures of ER strategies and depressive symptoms. Results revealed an interactive effect of maternal MDD history and youth rumination on child's LPP response. Specifically, a more blunted LPP response to emotional faces and shapes was observed among HR youth who engaged in more frequent rumination. Results revealed no main or interactive effects of youth's use of cognitive reappraisal or suppression strategies in shaping youth's LPP response. Findings suggest that certain characteristics among HR offspring (e.g., reporting more frequent use of rumination) may place them at higher risk for exhibiting attenuated emotional reactivity at the neural level.