Older brains are more similar to younger brains than previously thought, according to a new study.
Certainly, brains change as we get older. People get dementia and that is linked to plaque build-up, but that is not neuronal activity, as some papers using functional magnetic resonance imaging (fMRI) have claimed. Instead, it may be due to vascular (blood vessel) changes.
Since fMRI is frequenly used (and misused) in studies to assess aging, this could have important consequences for mainstream media's ability to promote a new theory of aging once a month.