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Obesity May Shrink Your Brain

Study finds cognitive regions smaller in obese elderly

By Matt Cantor,  Newser Staff

Posted Aug 24, 2009 9:38 AM CDT

(Newser) – Important cognitive brain regions are smaller in older obese people than fit ones, scientists have found. Shrinking brains are tied to dementia, so the discovery fuels the notion that obesity can raise the risk of the cognitive disorder, New Scientist reports. In a review of 94 brain scans, subjects with higher body mass indexes had memory and planning areas that appeared particularly shrunken.

The brains of the 51 overweight people were 6% smaller than those of their leaner peers, while the brains of the 14 obese people were 8% smaller. “The brains of overweight people looked eight years older than the brains of those who were lean, and 16 years older in obese people,” said a researcher. But another scientist says we don't yet know "which is the chicken and which is the egg," pointing out that the shrunken frontal and temporal lobes control eating behavior and metabolism, which could trigger weight gain.

An expanded waistline could signal a shrinking brain.
An expanded waistline could signal a shrinking brain.   (AP Photo/Ron Edmonds)
More bad news for the obese...
More bad news for the obese...   (Shutterstock)
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COMMENTS
Showing 3 of 14 comments
dearlizzie
Aug 24, 2009 8:02 AM CDT
Think Unaffiliated is on to something. The correlation is more likely between exercise and brain size/function than simply weight. Obese people (old or young) are probably less likely to exercise as much as their slimmer contemporaries.
doingtherightthing
Aug 24, 2009 5:26 AM CDT
Observation: I walked to the grocery store (1.5m) the other day. Grabbed a cup of coffee and sat down at the counter next to the entrance/exit doors. I was amazed at all the fat women coming through the doors. I'm not talking overweight, I'm talking 280+ pounders. I'll give the men credit overweight yes, obese very few.......this nation is going fat alright, fat women mostly.....the article is right small brains mostly women
2-bits
Aug 24, 2009 4:50 AM CDT
Some people just don't like me. :)

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