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Brain region governing 'drive' is barely active during adolescence




Scientists may have discovered a biological excuse for laziness.

Studies conducted on adolescents and young adults show significant differences between the two age groups in the brain region that governs “drive,?the internal momentum to work for a reward.

This region, barely active in adolescence, apparently comes into its own in the early 20s.

Scientists at the National Institute on Alcohol Abuse and Alcoholism used brain scans to test whether the developing teen-age brain is any different from the mature brain of an adult when faced with an opportunity to make money.

James Bjork and colleagues found that as adults worked to make money in a research task, their brains experienced an increase in blood flow and volume in the nucleus accumbens, a region deep in the middle of the brain.



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