A new study suggests the brain’s wiring doesn’t develop or decline in a smooth, linear way. Instead, its network of connections appears to move through five broad phases, separated by four major turning points around ages 9, 32, 66, and 83.
Defining the “Epochs” of Our Brains
The analysis, published in Nature Communications, combined diffusion MRI scans from more than 4,000 participants, aged from newborns to 90 years. Diffusion MRI tracks the movement of water through brain tissue, allowing researchers to reconstruct the white-matter “wiring” that links different regions.
For each scan, the team constructed a structural connectome and…
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