And so we had this focal area called the medial prefrontal cortex that went way up in activity.

and the media exchange year itself has also become a distinctive move in the history of international medial exchanges.

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This region is more active in adolescents when they make these social decisions and think about other people than it is in adults, and this is actually a meta analysis of nine different studies in this area from labs around the world, and they all show the same thing, that activity in this medial prefrontal cortex area decreases during the period of adolescence.

So in my lab, we bring adolescents and adults into the lab to have a brain scan, we give them some kind of task that involves thinking about other people, their minds, their mental states, their emotions, and one of the findings that we've found several times now, as have other labs around the world, is part of the prefrontal cortex called medial prefrontal cortex, which is shown in blue on the slide, and it's right in the middle of prefrontal cortex in the midline of your head.