The CNN article seems not to justify the claim of "change". The experiment appears to demonstrate that obese people's brains do this, while non-obese people's

The CNN article seems not to justify the claim of "change". The experiment appears to demonstrate that obese people's brains do this, while non-obese people's brains do that, but the inference that the obese brains started out just like non-obese brains is unsupported.