What is RBD?
REM sleep behavior disorder causes acting out vivid dreams — punching, kicking, shouting during REM sleep due to loss of normal muscle paralysis.
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The synucleinopathy connection
RBD often precedes Parkinson's, dementia with Lewy bodies or multiple system atrophy by years — ~80–90% develop these within 10–15 years.
Diagnosis and treatment
Polysomnography confirms RBD (REM sleep without atonia). Melatonin first-line, clonazepam alternative. Safety measures essential. Monitor for neurodegeneration.