[div class=attrib]From Wired:[end-div]
Ever since the late-1990s, when researchers discovered that the human brain takes into our mid-20s to fully develop — far longer than previously thought — the teen brain has been getting a bad rap. Teens, the emerging dominant narrative insisted, were “works in progress” whose “immature brains” left them in a state “akin to mental retardation” — all titles from prominent papers or articles about this long developmental arc.
In a National Geographic feature to be published next week, however, I highlight a different take: A growing view among researchers that this prolonged developmental arc is less a matter of delayed development than prolonged flexibility. This account of the adolescent brain — call it the “adaptive adolescent” meme rather than the “immature brain” meme — “casts the teen less as a rough work than as an exquisitely sensitive, highly adaptive creature wired almost perfectly for the job of moving from the safety of home into the complicated world outside.” The teen brain, in short, is not dysfunctional; it’s adaptive. .
Carl Zimmer over at Discover gives us some further interesting insights into recent studies of teen behavior.
[div class=attrib]From Discover:[end-div]
Teenagers are a puzzle, and not just to their parents. When kids pass from childhood to adolescence their mortality rate doubles, despite the fact that teenagers are stronger and faster than children as well as more resistant to disease. Parents and scientists alike abound with explanations. It is tempting to put it down to plain stupidity: Teenagers have not yet learned how to make good choices. But that is simply not true. Psychologists have found that teenagers are about as adept as adults at recognizing the risks of dangerous behavior. Something else is at work.
Scientists are finally figuring out what that “something” is. Our brains have networks of neurons that weigh the costs and benefits of potential actions. Together these networks calculate how valuable things are and how far we’ll go to get them, making judgments in hundredths of a second, far from our conscious awareness. Recent research reveals that teen brains go awry because they weigh those consequences in peculiar ways.
… Neuroscientist B. J. Casey and her colleagues at the Sackler Institute of the Weill Cornell Medical College believe the unique way adolescents place value on things can be explained by a biological oddity. Within our reward circuitry we have two separate systems, one for calculating the value of rewards and another for assessing the risks involved in getting them. And they don’t always work together very well.
… The trouble with teens, Casey suspects, is that they fall into a neurological gap. The rush of hormones at puberty helps drive the reward-system network toward maturity, but those hormones do nothing to speed up the cognitive control network. Instead, cognitive control slowly matures through childhood, adolescence, and into early adulthood. Until it catches up, teenagers are stuck with strong responses to rewards without much of a compensating response to the associated risks.
[div class=attrib]More from theSource here.[end-div]
[div class=attrib]Image courtesy of Kitra Cahana, National Geographic.[end-div]