Little-Known Sleep Disorder Linked to Dementia

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A sleep disorder called REM sleep behavior disorder, which causes people to physically act out their dreams, is affecting millions and has clear links to the development of dementia, according to experts. The condition is often misunderstood, but can lead to serious health consequences if left untreated.

Why it matters

REM sleep behavior disorder is an under-recognized condition that can be an early indicator of neurodegenerative diseases like Parkinson's and Lewy body dementia. Understanding the risks and symptoms of this disorder is crucial for early detection and treatment to potentially delay or prevent the onset of dementia.

The details

REM sleep behavior disorder is characterized by a loss of the normal muscle paralysis that occurs during REM sleep, allowing people to physically act out their dreams. This can include shouting, kicking, punching, and even falling out of bed. The disorder is often a precursor to the development of neurodegenerative diseases like Parkinson's and Lewy body dementia, which can manifest years or even decades later.

• REM sleep behavior disorder was first identified as a distinct sleep disorder in the 1980s.

What’s next

Researchers are continuing to study REM sleep behavior disorder to better understand its links to dementia and develop more effective treatments.