Sleep behavior disorder linked to brain disease
A sleep disorder that causes people to act out their dreams is the best current predictor of brain diseases like Parkinson?s and Alzheimer?s, research suggests. In this disorder, the disturbance occurs during the rapid-eye-movement (REM) stage of sleep and causes people to act out their dreams, often resulting in injury to themselves and/or bed partner. In healthy brains, muscles are temporarily paralyzed during sleep to prevent this from happening.
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