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Using electricity to precisely stimulate the brain can boost people’s working memory, a study suggests.

The team at Boston University, in the US, gave people in their sixties and seventies the working memory of someone in their twenties.

The effect lasted at least 50 minutes after the stimulation stopped.

But larger studies are now needed to see if stimulation could help people in the “real world” or in treating brain diseases like Alzheimer’s.

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