Functional brain alterations in anxious depression: Insights from whole-brain fMRI and meta-analysis.
Hao Huang, Zhiwei Guo, Xiqin Yang et al.
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In 30 seconds
This meta-analysis examined whole-brain neuroimaging differences in anxious major depressive disorder (aMDD), compared with pure major depressive disorder (MDD) and healthy controls, and explored gender differences. It included 11 studies with 829 people with aMDD, 681 with MDD, and 865 healthy controls. Compared with MDD, aMDD was associated with increased functional alteration in the left middle temporal gyrus. Comparisons with healthy controls identified alterations in the anterior commissure and right middle frontal gyrus; meta-regression also found sex-related regional activity differences in females with aMDD.
Key findings
- Across 11 studies, the meta-analysis included 829 aMDD patients, 681 MDD patients, and 865 healthy controls.
- Compared with MDD, aMDD was associated with increased functional alteration in the left middle temporal gyrus.
- Compared with healthy controls, aMDD showed increased functional alteration in the anterior commissure and decreased alteration in the right middle frontal gyrus.
- In females with aMDD versus controls, meta-regression found heightened activity in the left middle cingulate and right anterior thalamic regions, and weakened activity in the left rolandic operculum.
Why it matters
The findings suggest that anxious depression may have functional brain patterns distinguishable from both MDD without anxiety and healthy status, with additional sex-related differences. These results may help guide research into neurobiological markers and the heterogeneity of depressive disorders, but the reported regional associations do not establish diagnostic utility or explain underlying mechanisms.
What to keep in mind
The analysis synthesised 11 studies, and the abstract does not report validation of these regional findings as diagnostic markers.