I continue to be fascinated with the compelling research about how our brain changes when we overeat and then become accustomed to overeating. This particular research is especially interesting because it also addresses how overeating affects children at risk of obesity.
"What that suggests, the researchers said, is that the caudate response decreases as a result of overeating through the lifespan.
"The decrease in caudate response doesn't precede weight gain, it follows it," Small said. "That suggests the decreased caudate response is a consequence, rather than a cause, of overeating."
"One of the primary culprits behind obesity, she said, is the constant availability of "excessively rewarding food" that, when eaten often, may alter the brain's reward system.
"It's increasingly being recognized that the brain itself plays a fundamental role in obesity and overeating," Volkow said."
http://www.nlm.nih.gov/medlineplus/news/fullstory_106525.html