Weaker inputs to a key emotion hub are linked to more depressive symptoms in healthy young adults
Young adults with weaker incoming connections to the subgenual anterior cingulate cortex, a small region that helps regulate emotion, tended to report more depressive symptoms, according to brain scans of 890 healthy volunteers.
A study of 890 neurotypical young adults found that weaker connections to the subgenual anterior cingulate cortex (sgACC) correlated with more severe depressive symptoms. The sgACC, a brain region involved in regulating emotion and bodily responses, showed weaker input from several frontal, parietal, temporal, and occipital areas.
These weaker inputs were associated with higher depression scores, though the differences were modest. The sgACC's activity appeared to influence movement-related areas, the brainstem, and the cerebellum. Clustering based on incoming connections separated participants into five groups, with depression scores increasing from the first to the fifth group.
The link between the groups and depression remained even after accounting for sex. While the study's findings suggest the importance of sgACC inputs in depressive symptom severity, its limitations include not recruiting participants based on psychiatric diagnoses and the lack of replication in independent datasets.
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