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Light Sleepers More Likely To Get Alzheimer’s

February 17, 2012 by  

Light Sleepers More Likely To Get Alzheimer’s

The amount and quality of sleep you get at night may affect your memory later in life, according to research to be presented at the American Academy of Neurology’s 64th Annual Meeting in New Orleans in April.

“Disrupted sleep appears to be associated with the build-up of amyloid plaques, a hallmark marker of Alzheimer’s disease, in the brains of people without memory problems,” says study author Yo-El Ju, MD, with Washington University School of Medicine in St. Louis and a member of the American Academy of Neurology. “Further research is needed to determine why this is happening and whether sleep changes may predict cognitive decline.”

Researchers tested the sleep patterns of 100 people between the ages of 45 and 80 who were free of dementia. Half of the group had a family history of Alzheimer’s disease. A device was placed on the participants for two weeks to measure sleep. Sleep diaries and questionnaires were also analyzed by researchers.

After the study, it was discovered that 25 percent of the participants had evidence of amyloid plaques, which can appear years before the symptoms of Alzheimer’s disease begin. The average time a person spent in bed during the study was about eight hours, but the average sleep time was 6.5 hours due to short awakenings in the night.

The study found that people who woke up more than five times per hour were more likely to have amyloid plaque build-up compared to people who didn’t wake up as much.

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