Photos: Getty Images
You know that little voice in your head that looks at a big plate of fresh cookies and whispers, "You'd better eat just one?" Turns out, in people who are already obese, it may be a teeny-tiny voice or missing altogether.
That's the finding of brain researcher Dr. Antonio Convit, a professor of psychiatry and medicine at the New York University School of Medicine and the Nathan Kline Institute, reports New Scientist magazine. Convit and others have long been aware that type 2 diabetes is associated with memory difficulties, the result of a diabetic's inability to increase fuel for the brain to conduct the kind of problem solving that will, for instance, allow them to remember where the heck they put their car keys.
Figuring something similar might occur in people who were obese, Convit looked at the brains of 44 middle-aged obese people and 19 lean ones, using MRI's and other tests.
What he found were changes in the obese subjects in two parts of the brain that play major roles in eating. In obese people there was more water in the amygdala, which, among its functions, regulates feeding behavior. He also found that the orbital frontal cortex of the brains of obese people was smaller, which meant it had less ability to perform one of its key functions -- inhibit automatic responses -- such as the impulse to eat that whole plate of cookies.















