If you needed another reason to lose weight, scientists have just uncovered something that might be of interest. Researchers at UCLA recently reported that body fat may be inversely related to brain size.
According to a Healthday interview with lead scientist Paul Thompson, being overweight or obese ages the brain by 8 to 16 years, respectively. Moreover, the areas of the brain most affected by excess body fat are the frontal and temporal lobes. The frontal lobe is responsible for everything from problem solving ability to memory, impulse control and social behaviors whereas the temporal lobe coordinates both visual and auditory information. Increased degeneration of these areas has been suggested to lead to Alzheimer's disease.
To make the above determinations brain images from 94 elderly adults were studied. The individuals were then followed for five years. The brains of obese participants were 8% smaller than those of normal-weight participants, whereas overweight participants had 4% less brain tissue.
Although a cause-and-effect relationship could not be determined from this study, the researchers suggest that it could be a result of poor nutrient delivery to the brain in obese individuals. If this is the case, exercise, which increases nutrient delivery throughout the body, might play an important role in preventing the loss of brain tissue in overweight and obese.
HealthyDay News (2009) As Waistlines Widen, Brains Shrink. Wednesday, August, 26.
