Overview
- The Nature Communications paper identifies inflection points near ages 9, 32, 66 and 83 that define five population‑level epochs of brain network organization.
- The 9–32 epoch is the only stage with rising network efficiency, peaking around 29–32, and aligns with the highest risk period for onset of mental‑health disorders.
- From 32 to 66 the brain shows relative stability as efficiency gains reverse and local connectivity strengthens, matching a reported plateau in intelligence and personality.
- Early aging (≈66–83) features increasingly modular connectivity, followed by late aging (83+) with intensified changes and further declines in global integration.
- Researchers analyzed diffusion MRI from roughly 3,800 individuals aged 0–90, proposing uses for education, health policy and care, while noting limits including lack of sex or socio‑demographic stratification and sparser data at the oldest ages.