Differences in neural and cognitive response to emotional faces in middle-aged dizygotic twins at familial risk of depression

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K W Miskowiak, A M B Svendsen, C J Harmer, R Elliott, J Macoveanu, H R Siebner, L V Kessing, M Vinberg

BACKGROUND: Negative bias and aberrant neural processing of emotional faces are trait-marks of depression but findings in healthy high-risk groups are conflicting.

METHODS: Healthy middle-aged dizygotic twins (N = 42) underwent functional magnetic resonance imaging (fMRI): 22 twins had a co-twin history of depression (high-risk) and 20 were without co-twin history of depression (low-risk). During fMRI, participants viewed fearful and happy faces while performing a gender discrimination task. After the scan, they were given a faces dot-probe task, a facial expression recognition task and questionnaires assessing mood, personality traits and coping.

RESULTS: Unexpectedly, high-risk twins showed reduced fear vigilance and lower recognition of fear and happiness relative to low-risk twins. During face processing in the scanner, high-risk twins displayed distinct negative functional coupling between the amygdala and ventral prefrontal cortex and pregenual anterior cingulate. This was accompanied by greater fear-specific fronto-temporal response and reduced fronto-occipital response to all emotional faces relative to baseline. The risk groups showed no differences in mood, subjective state or coping.

CONCLUSIONS: Less susceptibility to fearful faces and negative cortico-limbic coupling during emotional face processing may reflect neurocognitive compensatory mechanisms in middle-aged dizygotic twins who remain healthy despite their familial risk of depression.

Original languageEnglish
JournalPsychological Medicine
Volume47
Issue number13
Pages (from-to)2345-2357
Number of pages13
ISSN0033-2917
DOIs
Publication statusPublished - Oct 2017

    Research areas

  • Journal Article

ID: 184209220