When does a brain stop growing?

The human brain reaches its maximum physical size around the age of 18 to 20 years. After this point, the brain does not grow any larger, but it continues to undergo structural and functional changes throughout life.

During childhood and adolescence, the brain undergoes significant development and maturation, with different regions of the brain reaching different developmental milestones at different ages. For example, the prefrontal cortex, which is involved in decision-making and social behavior, continues to mature into the mid-20s.

While the brain may stop growing in size after the age of 20, it continues to change and adapt throughout life in response to learning, experience, and other factors. For example, the brain can form new connections between neurons (brain cells) and adapt existing neural pathways in response to new experiences and learning. This process, known as neuroplasticity, can continue throughout life and is thought to be important for learning and memory