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Becoming an adult means leaving the world of your parents and starting to make your way toward the future that you will share with your peers. Puberty not only turns on the motivational and emotional system with new force, it also turns it away from the family and toward the world of equals.

emotion and motivation

control

Of course the brains of children with behavior problems will show anomalies on brain scans. It could not be otherwise. Behavior and the brain are intertwined.

If these children are not paying attention because of lack of motivation or an underdeveloped capacity to regulate their behavior, their brain scans are certain to be anomalous.

However brain functioning is measured, these studies tell us nothing about whether the observed anomalies were present at birth or whether they resulted from trauma, chronic stress or other early-childhood experiences. One of the most profound findings in behavioral neuroscience in recent years has been the clear evidence that the developing brain is shaped by experience.