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Sleep Disorder Could Signal Neurological Disease
Date:12/24/2008

Finding could help docs spot those at risk for dementia, Parkinsons, researchers say

WEDNESDAY, Dec. 24 (HealthDay News) -- People with a disorder that causes them to kick or cry out during deep sleep are more likely to develop dementia or Parkinson's disease, a new Canadian study suggests.

"It's basically a disorder where you act out your dreams at night," explained study author Dr. Ronald B. Postuma, of McGill University in Montreal. "When people who have RBD [REM Sleep Behavior Disorder] dream they are in a fight, which is very common, they will make punching movements."

Researchers followed 93 RBD patients and examined them after five, 10 and 12 years for signs of neurological disorders such as dementia or Parkinson's disease. After 12 years, researchers found the majority of people with RBD developed either dementia or Parkinson's, with 26 developing neurodegenerative disease, 15 developing Parkinsons and 11 developing dementia.

"These disorders happen to 1 to 2 percent of the general population in their entire lives, so 50 percent at 12 years is much, much higher," Postuma said. His report was published in the Dec. 24 online issue of Neurology.

While sleep disorders are common, researchers emphasized that the majority are due to the stress of modern life and will not necessarily lead to neurological diseases.

"Half the population has a sleep problem, but most of the time, they're benign," said Michael Jakowec, an assistant professor of neurology at George and Mary Lou Boone Parkinson's Disease and Movement Disorders Research Center at the University of Southern California Keck School of Medicine. "We live in a society with anxiety, stress, late night TV and cappucinos."

"It's important to point out that this is a relatively dramatic disorder that comes on in your 50s and 60s, so it's not something that happens once in awhile your entire life," Postuma explained. "A
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