Your brain changes at 9, 32, 66, and 83
undefined 25, 2025
Cambridge neuroscientists identified five major phases of brain structure across the human lifespan using MRI scans of 3,802 people. Key turning points occur at ages 9 (childhood), 32 (adulthood), 66 (early aging), and 83 (late aging). Childhood features synapse pruning; adulthood shows peak cognitive wiring; early aging sees gradual connectivity decline; late aging shifts from global to local networks. Mapping these phases helps explain vulnerabilities in learning, mental health, and cognition at different life stages.
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