Clinical NeuroscienceResearch PaperDepression symptoms and cognitive control of emotion cues: a functional magnetic resonance imaging study
Section snippets
Participants
Thirty-two women participated in the current study. They were recruited primarily through advertisements placed online, in newspapers, and at local community centers. The study was described as an investigation of emotional information processing and brain activity. Depression was not mentioned in advertisements. The average age of participants ranged from 18 to 28 (mean=21.8). The race/ethnicity of the participants were 59% White, 18% Hispanic, 12% Black, and 11% Other/multiple races. All
Behavioral results
We conducted a 3 (stimuli valence: sad, happy, neutral)×2 (cue validity: valid, invalid)×2 (depression group: LD, HD) repeated measures analysis of variance with reaction time to identify probe location as the dependent variable. There was a significant main effect of cue validity, F(1,25)=8.26, P=.01, partial η2=.25. There was a trend towards the moderation of this cue validity effect by stimuli valence, F(2,50)=2.65, P=.09, partial η2=.10. Post-hoc testing indicated that the interaction was
Discussion
This study examined behavioral and neural effects of mild to moderate depressive symptoms on cognitive control of emotion stimuli. Depressive symptoms did not alter behavioral responses to emotion cues. However, differential brain activation was observed between depression groups in a number of regions during trials that required cognitive control over emotion stimuli. For instance, vlPFC activation was lower for valid cues relative to invalid cues, presumably because cognitive control is not
Conclusion
This study demonstrates that depressive symptoms are associated with impaired engagement of lateral PFC and parietal brain regions during cognitive control of emotional information. However, these findings should be considered preliminary, as additional research with larger samples of men and women are needed to confirm the present results. Further, we did not assess menstrual cycle phase and we performed a number of statistical tests in a relatively small sample. Nevertheless, this study
Acknowledgments
Preparation of this article was facilitated by funding from the National Institute of Mental Health (R01MH076897) to Christopher Beevers and Army grant #W911NF-07-2-0023 to David Schnyer through The Center for Strategic and Innovative Technologies at The University of Texas at Austin.
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