Signs of Alzheimer's Seen Earlier Than Thought

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Those at the highest risk were most likely to suffer a decline.

Brain scans have suggested that people doomed to get Alzheimer's begin to show signs of physical problems around age 60, said Caselli, clinical core director at the Arizona Alzheimer's Disease Center and chair of neurology at the Mayo Clinic.

"Until now, nobody has been able to show that there's actual cognitive changes that accompany this," Caselli said.

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Still, the mental changes are small and may not even be noticeable. "These are normal, healthy working people," he said.

In the other study, researchers assigned 162 adults with a parent who had Alzheimer's to either receive or not receive information about their own genetic risk of the disease.

Contrary to some assumptions, those who learned about their risk understood the information they were given and were glad that they had been informed, said Green, co-director of the Alzheimer's Disease Clinical & Research Program at Boston University.

"Some people are information-seekers, and they just feel better and more complete when they have more information," Green said.

More information

Get facts and figures about Alzheimer's from the Alzheimer's Association.

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