President Biden and former President Trump have both experienced public memory lapses. But brain experts say such slips, on their own, are not a cause for concern.
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"Even the so-called successful agers, if you measure their cognitive performance, you will see certain changes compared to their baseline," Tan says.One reason for the decline is a decrease in the speed at which the brain processes information. Slower processing means a person may take longer to respond to a question or make a decision.
A typical person in their 20s might be able to reliably hold seven digits in working memory, Sha says."As we age, that might diminish to something like six digits, but not zero." But diagnosing those conditions requires more than an hour of testing and a thorough history of someone's life, Tan says, not just watching a few seconds of a press conference.
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