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Interacting with other people through volunteering, work, and other social activities is also an important way to stimulate and challenge the brain, she adds.
CNN: Experts reveal best ways to save an aging brain
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However, even if you didn't finish high school or have other factors you can't change, you can still challenge your brain to preserve mental function, Fiocco says.
CNN: Experts reveal best ways to save an aging brain
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However, Dr Neil Stanley, of the University of Surrey, said sleep loss harmed spatial learning, although the brain could rise to the "spatial learning" challenge in the short-term it would struggle eventually.
BBC: Spatial memory works in a similar way in rats and humans