Human brains go through five stages of aging
Ali Eldridge – In the majority of countries, including the United States and United Kingdom, “adulthood” is often said to begin at 18, when people gain certain rights and privileges such as the ability to vote or enter legally binding contracts. But neuroscientifically speaking, the true age of adulthood is one that most people let pass by without any fanfare.
In 2025, scientists at the University of Cambridge published a study in which they determined the brain goes through five stages of aging — and, on average, the “adult” stage begins around age 32.
According to the research, which studied the brains of nearly 4,000 people between the ages of 0 and 90, the human brain has four “turning points” over a lifetime, which correspond to major changes in its neural wiring. Those changes happen around ages 9, 32, 66, and 83, and divide the lifespan into five brain eras: childhood, adolescence, adulthood, early aging, and late aging. Continue reading