KEY RESEARCH FINDINGS
- The brain’s structure can be rewired: Self-reported improvements in the BrainHealth Index were significantly linked to underlying, state-like changes in the brain's neuroanatomy, reinforcing that neural efficiency drives structural optimization across adulthood.
- Cortical complexity is a biomarker: Significant increases in the gyrification index (the complexity of cortical folding) were found in the left insula and posterior cingulate cortex as participants’ brain health scores improved over time. The insula acts as a critical hub connecting key brain networks responsible for higher-order cognition.
- Sex-specific trajectories in women: In female participants, gains in brain health correlated uniquely with increased sulcal depth within the left precuneus, middle temporal gyrus, and right cingulate gyrus—regions highly associated with memory processing, emotional regulation, and successful cognitive aging.
- Predictive traits in men: In male participants, higher baseline brain health scores predicted a significant increase in fractal dimension over time within the left inferior parietal cortex, indicating that baseline cortical complexity can serve as a trait marker identifying individuals primed for brain health optimization.
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