It is largely believed that the human brain hasn't fully developed until the mid 20s. One might expect that a young adult of 18 years would have a mature brain, but this in fact, is not the case. At that age, their brains are still developing. A part of the brain called the "Pre-Frontal Cortex", which is responsible for organization and impulse control, is still partly underdeveloped.
Factors influencing brain maturation include:
- Environment and heredity
- Age (10-25 years)
- Sex hormones (estrogen, progesterone, testosterone)
- Physical, mental and psychological status
- Socioeconomic status
- Drug abuse (nicotine, caffeine, alcohol)
- Exercise and meditation
Although brain growth stops at about the age of 25 and might be completed by 30 years , it continues to undergo neural changes as learning and adaptation takes place.