REM Sleep Behavior Disorder

At the initial visit, document event frequency, violent or high-amplitude behaviors, falls from bed, injuries, weapons or dangerous furniture near the bed, and bed-partner exposure. Recurrent RBD behaviors may injure the patient or bed partner and have been associated with life-threatening injury; institute environmental protection at the same visit rather than waiting for polysomnography. ScienceDirect+2ScienceDirectRapid eye movement sleep behavior disorder: devising controlled active treatment studies for symptomatic and neuroprotective therapy—a consensus statement from the International Rapid Eye Movement Sleep Behavior Disorder Study Group - ScienceDirectPubMedRapid eye movement sleep behavior disorder: devising controlled active treatment studies for symptomatic and neuroprotective therapy—a consensus statement from the International Rapid Eye Movement Sleep Behavior Disorder Study Group - PMCPubMedLong-Term Follow-up Investigation of Isolated Rapid Eye Movement Sleep Without Atonia Without Rapid Eye Movement Sleep Behavior Disorder: A Pilot Study - PMC

Take a collateral history from the bed partner when available. History alone has only moderate interobserver reliability for sleep-related injuries and can miss RBD; obtain a detailed description of vocalization, punching, kicking, running, dream recall, timing within the sleep period, and whether events occur in association with gasping or witnessed apneas. PubMed+1PubMedDiagnosis of REM Sleep Behavior Disorder by Video-Polysomnographic Study: Is One Night Enough? - PMCPubMedRapid Eye Movement Sleep Behavior Disorder - StatPearls - NCBI

Order an attended in-laboratory video polysomnogram, not a home sleep test, when RBD is suspected. The required physiologic finding is REM sleep without atonia (RSWA): increased tonic chin electromyographic activity and/or excessive phasic chin or limb electromyographic activity during REM sleep. EEG, respiratory channels, limb EMG, and synchronized video permit event staging and evaluation for sleep-disordered breathing, seizures, periodic limb movements, and alternative parasomnias. PubMed+2PubMedDifferential Impact on Isolated REM Sleep without Atonia by Varying Antidepressant Therapies - PMCPubMedRapid Eye Movement Sleep Behavior Disorder - StatPearls - NCBIScienceDirectRapid Eye Movement Behavior Disorder - an overview

Apply ICSD-3 criteria: recurrent sleep-related vocalization and/or complex motor behavior; behaviors documented during REM sleep or clinically presumed to occur in REM sleep; polysomnographic RSWA; and no better explanation from another sleep disorder, mental disorder, medication, or substance use. RSWA alone is not RBD because it can be an incidental finding, including in patients receiving antidepressants. PubMed+1PubMedDifferential Impact on Isolated REM Sleep without Atonia by Varying Antidepressant Therapies - PMCPubMedREM Sleep Behavior Disorder and REM Sleep Without Atonia as an Early Manifestation of Degenerative Neurological Disease

If no overt dream-enactment event occurs during the study, RSWA can still establish the required polysomnographic component in a patient with a convincing clinical history. Conversely, do not diagnose RBD from video behavior without RSWA or when movements are better explained by respiratory events or periodic limb movements. PubMed+1PubMedDiagnosis of REM Sleep Behavior Disorder by Video-Polysomnographic Study: Is One Night Enough? - PMCPubMedRapid Eye Movement Sleep Behavior Disorder - StatPearls - NCBI

After PSG confirmation, review medication and substance exposure and assess for comorbid sleep and neurologic disorders. RBD is interlinked with narcolepsy-cataplexy, neurologic disease, antidepressants, beta blockers, and other medical pharmacotherapies; ICSD-3 criteria require that another sleep disorder, mental disorder, medication, or substance use not better explain the presentation. PubMed+1PubMedRapid eye movement sleep behavior disorder: devising controlled active treatment studies for symptomatic and neuroprotective therapy—a consensus statement from the International Rapid Eye Movement Sleep Behavior Disorder Study Group - PMCPubMedDifferential Impact on Isolated REM Sleep without Atonia by Varying Antidepressant Therapies - PMC

In patients with established Parkinson disease, dementia with Lewy bodies, or multiple system atrophy, treat RBD as secondary to a medical condition and coordinate symptom management with the neurologic care plan. In patients without overt parkinsonism or dementia after exclusion of an alternative explanation, designate the condition isolated RBD and initiate longitudinal surveillance for synucleinopathy. Nature+3NatureAssociation of wearable sensor-based gait analysis with phenoconversion trajectories in idiopathic REM sleep behavior disorder | npj Parkinson's DiseaseNatureFactors associated with phenoconversion of idiopathic rapid eye movement sleep behavior disorder: a prospective study | npj Parkinson's DiseasePubMedManagement of REM sleep behavior disorder: an American Academy of Sleep Medicine clinical practice guideline - PubMedPubMedThe North American Prodromal Synucleinopathy study: protocol for a multi-site, longitudinal, observational study of idiopathic/isolated rapid eye movement sleep behavior disorder - PubMed

Assess for emerging motor and cognitive disease at baseline and follow-up rather than relying on a single normal neurologic examination. In longitudinal iRBD cohorts, motor measures and Movement Disorders Society-Unified Parkinson's Disease Rating Scale Part III changes accelerated approximately 4 years before phenoconversion, supporting repeated clinical assessment when subtle gait, bradykinetic, cognitive, or perceptual symptoms emerge. NeurologyNeurologyEvolution of Motor and Nonmotor Characteristics in an Idiopathic/Isolated REM Sleep Behavior Disorder Cohort | Neurology

For adults with isolated RBD, the AASM suggests clonazepam, immediate-release melatonin, or pramipexole versus no treatment. The guideline recommendations are conditional; choose among agents according to patient-specific adverse-effect vulnerability, comorbidity, concomitant medications, and the severity and frequency of injurious nocturnal behavior. PubMedPubMedManagement of REM sleep behavior disorder: an American Academy of Sleep Medicine clinical practice guideline - PubMed

For secondary RBD due to a medical condition, the AASM suggests clonazepam or immediate-release melatonin; transdermal rivastigmine is also suggested for secondary RBD due to Parkinson disease. For isolated RBD with mild cognitive impairment, transdermal rivastigmine is a suggested option. PubMedPubMedManagement of REM sleep behavior disorder: an American Academy of Sleep Medicine clinical practice guideline - PubMed

Do not use deep brain stimulation as RBD treatment; the AASM guideline suggests against it. Sodium oxybate has been studied in a small randomized phase 2 trial in treatment-resistant iRBD and Parkinson disease-associated RBD, but adverse events leading to withdrawal included anxiety and dizziness, and serious events included myoclonic episodes, sleep terror, and suicidal ideation; it should not displace guideline-supported first-line options. Oxford Academic+1Oxford AcademicSodium oxybate in treatment-resistant rapid-eye-movement sleep behavior disorder | SLEEP | Oxford AcademicPubMedManagement of REM sleep behavior disorder: an American Academy of Sleep Medicine clinical practice guideline - PubMed

Explain that polysomnography-confirmed isolated RBD is a strong prodromal manifestation of alpha-synucleinopathies. In a prospective cohort of 141 patients, cumulative incidence of phenoconversion to Parkinson disease, dementia with Lewy bodies, or multiple system atrophy was 16.30% at 3 years, 27.57% at 5 years, and 57.20% at 10 years; other longitudinal literature reports that risk can reach approximately 80% over longer follow-up. Nature+2NatureAssociation of wearable sensor-based gait analysis with phenoconversion trajectories in idiopathic REM sleep behavior disorder | npj Parkinson's DiseaseNatureFactors associated with phenoconversion of idiopathic rapid eye movement sleep behavior disorder: a prospective study | npj Parkinson's DiseasePubMedLong-Term Follow-up Investigation of Isolated Rapid Eye Movement Sleep Without Atonia Without Rapid Eye Movement Sleep Behavior Disorder: A Pilot Study - PMC

Frame the outcome spectrum accurately: Parkinson disease and dementia with Lewy bodies are the most common phenoconversion outcomes and occur with roughly equal risk in one summary, whereas multiple system atrophy is less common. In the 141-person prospective cohort, 36 patients converted: 21 to Parkinson disease, 11 to dementia with Lewy bodies, and 4 to multiple system atrophy. Nature+1NatureAssociation of wearable sensor-based gait analysis with phenoconversion trajectories in idiopathic REM sleep behavior disorder | npj Parkinson's DiseaseNatureFactors associated with phenoconversion of idiopathic rapid eye movement sleep behavior disorder: a prospective study | npj Parkinson's Disease

At follow-up, specifically ask about new bradykinesia, rigidity, tremor, gait change, cognitive decline, hallucinations, and autonomic symptoms, and perform a focused neurologic examination. Escalate to neurology when these develop; no disease-modifying or neuroprotective therapy is established in the cited clinical materials, and observational cohorts are being developed to facilitate future trials. PubMed+1PubMedThe North American Prodromal Synucleinopathy study: protocol for a multi-site, longitudinal, observational study of idiopathic/isolated rapid eye movement sleep behavior disorder - PubMedNeurologyEvolution of Motor and Nonmotor Characteristics in an Idiopathic/Isolated REM Sleep Behavior Disorder Cohort | Neurology