What is the connection between REM Sleep Behavior Disorder (RBD) and neurodegenerative diseases?

Reviewed by Yoshinori Abe, MD

Internal Medicine

REM Sleep Behavior Disorder (RBD) is a sleep condition strongly linked to a higher risk of developing neurodegenerative diseases such as Parkinson's disease, Lewy body dementia, and multiple system atrophy. Research shows RBD often appears years—sometimes even decades—before these conditions are diagnosed, making it one of the earliest known warning signs.

Because RBD can signal serious underlying health concerns long before other symptoms emerge, early recognition matters. If you or a loved one are experiencing acting-out dreams, sudden movements during sleep, or other unusual sleep behaviors, don't wait to find answers. Take a free, instant, online symptom check to better understand what may be going on and confidently navigate your next steps.

Reviewed for medical accuracy: 07/20/2026

Important Next Steps

Discover if RBD could signal neurodegenerative disease Learn what causes your RBD symptoms See whether RBD needs care today Find OTC options for RBD symptoms Find a doctor for RBD care Discover safe home remedies for RBD Understand if RBD may indicate Parkinson’s

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Explanation

REM Sleep Behavior Disorder (RBD) is a sleep disorder where people act out their dreams. This happens because the normal paralysis that occurs during REM sleep is absent. Research shows that RBD is connected to neurodegenerative diseases.

Key Points:

Increased Risk: People with RBD have a higher chance of developing diseases like Parkinson's disease, dementia, and multiple system atrophy.
Early Indicator: RBD can appear many years before the symptoms of neurodegenerative diseases are noticed. This makes it an important early sign to watch for.
Underlying Mechanisms: The exact reasons for this connection are not fully understood, but it is believed that the same brain changes that cause RBD might also lead to neurodegenerative diseases.

In summary, if someone has RBD, it might be an early sign of a more serious condition that could develop later. If you're experiencing unusual sleep behaviors or concerning symptoms, take Ubie's free symptom checker to better understand your condition. Monitoring and further evaluation by healthcare professionals are important for those showing signs of RBD.

(References)

Galbiati A, Verga L, Giora E, Zucconi M, & Ferini-Strambi L. (2019). The risk of neurodegeneration in REM sleep behavior .... Sleep medicine reviews, 30503716.
Gagnon JF, Postuma RB, Mazza S, Doyon J, & Montplaisir J. (2006). Rapid-eye-movement sleep behaviour disorder and .... The Lancet. Neurology, 16632313.
Zanigni S, Calandra-Buonaura G, Grimaldi D, & Cortelli P. (2011). REM behaviour disorder and neurodegenerative diseases. Sleep medicine, 22136901.

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