Reuters (12/31, Rapaport) reports that a small magnetic resonance imaging study published online Dec. 8 in the Journal of Adolescent Health revealed that teenage participants who identified themselves as smokers had heightened responses in dopamine-rich brain regions after watching videos of actors smoking. According to the study authors, the maturing teenage dopamine system causes the brain as a whole to react more significantly to rewards and thrills, which may render adolescents more susceptible to addiction.
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— “Teen smokers may be hard-wired to crave cigarettes,” Lisa Rapaport, Reuters, December 30, 2015.