Extreme eaters show abnormal brain activity

Pictures of food revs up reward circuits in the obese, slows them down in severely underweight

CHICAGO — Certain brain areas are sluggish in people who eat too little and hyperactive in people who eat too much, a new study finds.

The results, presented April 3 at the annual meeting of the Cognitive Neuroscience Society, are based on brain activity in people who ranged from dangerously thin to morbidly obese.