Extended functional connectivity of convergent structural alterations among individuals with PTSD: a neuroimaging meta-analysis.
Level 4 - case-series / case-control
Meta-analysis of observational case-control neuroimaging studies (graded by design analogy)
PubMed 36100907 · doi:10.1186/s12993-022-00196-2
What was done
Authors conducted an anatomical likelihood estimation meta-analysis of voxel-based morphometry studies to identify convergent structural brain alterations in individuals with PTSD. They then modeled resting-state functional connectivity and meta-analytic co-activation patterns seeded from the identified structural region, followed by functional decoding to determine associated mental domains.
What was found
No quantitative effect sizes, participant totals, or study counts were reported in the abstract. Convergent structural alterations in PTSD localized to a single region in the medial prefrontal cortex. Functional connectivity profiles linked this region to whole-brain networks across frontoparietal and limbic areas, overlapping with default mode, salience, and central executive networks, with decoding mapping to attention, memory, and emotion processes.
Why it matters
The findings link localized medial prefrontal structural changes in PTSD to large-scale functional networks implicated in the tripartite model of psychopathology, providing a network-level framework for cognitive and emotional symptoms.
Limits
The abstract omits study counts, total sample size, effect magnitudes, and anatomical coordinates. Clinical variables such as trauma exposure type, illness chronicity, psychiatric comorbidity, and pharmacotherapy could not be evaluated, and cross-sectional neuroimaging cannot demonstrate causality.
Cited by
- supports Severe psychological trauma causes physiological changes to subsequent brain function.