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Inside the brains of people over 80 with exceptional memory

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What qualities are found in those in their 80s with exceptional memory? A neuroscientist at Northwestern University wanted to find out. Superagers, as those with extraordinary memories were termed, are rare, with less than 10 percent performing well enough on memory tests to be deemed as such. After conducting MRIs, it was found that superagers did not experience the normal shrinking and thinning of the cortex and had brains that were similar to those 20-30 years their junior. Scientists were not able to understand why and have enlisted 30 more 80-year-olds for another study.