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REM Sleep Behavior Disorder

REM Sleep Behavior Disorder

REM Sleep Behavior Disorder (RBD) is a sleep disorder characterized by the absence of muscle paralysis that normally occurs during the REM phase of sleep. This absence allows individuals to physically act out their dreams, which are often vivid and disturbing. Common behaviors exhibited during episodes include kicking, punching, and yelling. These actions can be dangerous, potentially leading to injuries for the person with RBD or their bed partner.
RBD is significantly associated with...

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Related Experiment Video

Updated: Jun 9, 2025

2-Vessel Occlusion/Hypotension: A Rat Model of Global Brain Ischemia

2-Vessel Occlusion/Hypotension: A Rat Model of Global Brain Ischemia

Published on: June 22, 2013

Brainstem changes causing reversible RBD in patients with spontaneous intracranial hypotension: a longitudinal

Fabiana Novellino¹, Maria Salsone^2,3, Giuseppe Nicoletti⁴

¹Neuroscience Research Center, Department of Medical and Surgical Sciences, University "Magna Graecia", Catanzaro, Italy.

Neurological Sciences : Official Journal of the Italian Neurological Society and of the Italian Society of Clinical Neurophysiology

|October 28, 2024

Summary

Spontaneous intracranial hypotension (SIH) patients often have REM sleep behavior disorder (RBD). Epidural blood patch treatment improved brainstem structure and reversed RBD symptoms, suggesting brainstem changes are key.

Keywords:

Brainstem changes MRI morphometry REM sleep behavior disorder, RBD SIH follow-up study Spontaneous intracranial hypotension, SIH Structural MRI

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Area of Science:

Neurology
Sleep Medicine
Radiology

Background:

Spontaneous intracranial hypotension (SIH) is a condition causing cerebrospinal fluid leaks.
REM sleep behavior disorder (RBD) is characterized by loss of muscle atonia during REM sleep.
The relationship between SIH and RBD, and the impact of treatment on brainstem structures, remain unclear.

Purpose of the Study:

To determine the prevalence of RBD in SIH patients.
To assess the longitudinal effects of epidural blood patch (EBP) treatment on brainstem morphometry in SIH patients.
To explore the potential of midbrain area as a biomarker for SIH.

Main Methods:

22 participants (10 SIH patients, 12 controls) underwent 3T MRI.
Midbrain and pons areas were measured at baseline and 3 months post-EBP in SIH patients.
RBD screening and polysomnography (PSG) were performed.

Main Results:

50% of SIH patients had PSG-confirmed RBD.
SIH patients showed deep brain swelling (DBS) and larger midbrain/pons areas than controls.
EBP treatment led to significant brainstem morphometric changes and RBD remission.
A midbrain area of 200 mm² distinguished SIH patients from controls.

Conclusions:

Brainstem morphometric changes may cause reversible RBD in SIH.
Midbrain area measurement shows potential as a dynamic biomarker for SIH, especially with RBD.
Findings offer insights for clinical management of SIH and associated RBD.