Tag Archives: Body Mass Index

Obesity linked to smaller brain size

Fat shadowObesity (which currently affects about 26% of the world’s population) is associated with a wide range of health problems. Obese individuals are more likely to develop:

-Heart disease and stroke
-High blood pressure
-Diabetes
-Cancer
-Gallbladder disease and gallstones
-Osteoarthritis
-Gout
-Breathing problems, such as sleep apnea and asthma
Depression
-A generally poorer quality of life

and we can now add to that list: SMALLER BRAIN.

Researchers at UCLA Neurology have found a correlation between body mass index and brain weight. Their findings indicate that individuals who are obese tend to have smaller and lighter brains (6% smaller).

The most pronounced differences were observed in the prefrontal cortex (executive region of the brain, responsible for cognition (planning, decision making, etc)), and the parts of the brain that support memory, such as the hippocampus. The differences in brain mass and size made the brains of obese individuals look 16 years old than those of healthy weight. The researchers believe that these differences put obese individuals at a much higher risk for Alzheimer’s and dementia and reduced cognitive abilities.

However, some researchers are skeptical; suggesting that this may be a chicken or egg situation. Some of the brain areas that were found smaller in the obese also control aspects of eating and metabolism. They suggest that shrinkage in these brain areas may lead to obesity, rather than the other way around.

Regardless, the number of health risks associated with obesity are significant. Solution? As always, proper diet and exercise.