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Fortune
Fortune
Beth Greenfield

Here's what's going on with the average 80-year-old brain

Brain Fortune Joe Biden Memory America
Split screen of Trump and Biden on a monitor at the recent debate (Credit: Justin Sullivan/Getty Images)

In the wake of last week’s presidential debate between the 78- and 81-year-old candidates—and the impression among some that President Joe Biden looked “old and frail," with at least one public call for cognitive testing—much of America has had age on the brain.

But what does age actually do to the brain? Fortune consulted with experts on aging to get a clearer picture.

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