Baseline brain scan predicts adolescent depression and anxiety one year later
A study published on medRxiv found that baseline brain scans can predict depression and anxiety in adolescents one year later, suggesting neuroimaging may help identify at-risk youth before symptoms develop.
Background
- This is a preprint (not yet peer-reviewed) study posted on medRxiv, a free online server where researchers share early findings before formal journal publication.
- The study used structural brain MRI scans from 9-10 year olds in the large US Adolescent Brain Cognitive Development (ABCD) dataset, then checked which children developed depression or anxiety symptoms by age 11-12.
- Machine learning models trained on brain structure (regional volumes, surface area, cortical thickness) significantly predicted future onset of internalizing disorders — better than family history or behavioral questionnaires alone.
- Key finding: specific brain regions involved in emotion regulation, especially the amygdala, hippocampus, and prefrontal cortex, were the strongest predictors.
- The practical significance: if validated, brain scans could eventually help identify children most at risk early, allowing preventive intervention before symptoms appear — but the study notes ethical concerns and cautions against routine screening at this stage.