Neuroscientists are a bit fascinated by a woman who recently died at the age of 115. She was sharp until the end of her life, and her brain showed almost no sign of even incipient Alzheimer's disease. Her case and others suggest that dementia is not an inevitable consequence of aging. One researcher said, "Our observations suggest that, in contrast to general belief, the limits of human cognitive function may extend far beyond the range that is currently enjoyed by most individuals."
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