: The "399" figure highlights the strong correlation between RBD symptoms and long-term neurological health. RBD is often a prodromal (early) marker for synucleinopathies, including Parkinson's disease and Lewy body dementia. Core Features of REM Sleep Behavior Disorder
RBD is a parasomnia characterized by the lack of "muscle atonia" (temporary paralysis) that normally occurs during REM sleep. This leads to several distinct clinical features: RBD-399.avi
: Research published by the American Academy of Neurology analyzed 1,130 cases with RBD diagnostic codes. Out of 499 cases identified as having secondary causes for the disorder, exactly 399 (80%) were determined to have a neurodegenerative parkinsonian disorder or dementia (NPD) diagnosis. : The "399" figure highlights the strong correlation