Diagram showing the trajectory for early adolescence through to late adolescence. From the left-hand side, there is the text: Early adolescence Puberty onset heightens emotions, sensation seeking and importance of rewards. Then there is the text next to this one with: Middle adolescence Increased risk taking Problems regulating emotion and behaviour. And then on the right-hand side there is the text: Late adolescence Maturation of the brain’s frontal lobes allows self-regulation. There is an arrow running through all three, coming from the left and pointing to the right.