REM Sleep Behavior Disorder

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REM Sleep Behavior Disorder

Medically reviewed · Ratel Health editorial team · Sunday, 16 August 2026

A sleep disorder involving repeated episodes of vocalization or complex motor behavior arising during REM sleep, often enacting dreams.

Overview

REM sleep behavior disorder involves repeated episodes of arousal during REM sleep associated with vocalization or complex motor behaviors, often corresponding to dream content acted out due to loss of normal muscle paralysis during REM sleep.

Signs and Symptoms

Symptoms can include talking, shouting, punching, or kicking during sleep, sometimes resulting in injury to the individual or a bed partner. Experiencing one or more of these symptoms does not necessarily mean that a person has this condition. Diagnosis requires an appropriate clinical evaluation.

Causes and Risk Factors

REM sleep behavior disorder results from loss of normal muscle paralysis during REM sleep; it can occur independently or be an early sign of certain neurodegenerative conditions.

Diagnosis

A diagnosis should be made by a qualified healthcare professional following a comprehensive clinical assessment. Clinicians may use established diagnostic frameworks such as DSM-5-TR and/or ICD-11 as part of a comprehensive assessment.

Treatment

Treatment depends on the individual’s symptoms, clinical history, severity, age, co-occurring conditions, and other relevant factors.

Psychotherapy

Safety modifications to the sleep environment are an important part of management alongside medical treatment.

Medication

Certain medications may help reduce the frequency and severity of episodes. Medication decisions should be made with a qualified prescribing healthcare professional. Do not start, stop, or change a prescribed medication based solely on information on this page.

Living With REM Sleep Behavior Disorder

Removing sharp or hazardous objects from the bedroom and considering a bed rail or separate sleeping arrangement can help prevent injury.

When to Seek Professional Help

Professional evaluation may be appropriate if symptoms persist, worsen, cause significant distress, or interfere with work, school, or relationships.

Emergency Situations

If a person may be in immediate danger, is experiencing a medical or psychiatric emergency, or may harm themselves or another person, seek immediate assistance through appropriate local emergency services.

Outlook

Symptoms can often be reduced with treatment; ongoing neurological follow-up may be recommended given associations with other conditions.

Related Conditions

Lewy Body Dementia

A form of major or mild neurocognitive disorder involving abnormal protein deposits (Lewy bodies) in the brain, causing cognitive, motor, and visual symptoms.

Parkinson’s Disease Dementia

A form of major or mild neurocognitive disorder that develops in the context of established Parkinson’s disease, involving decline in thinking and memory.

Medical Information Disclaimer

Ratel Health provides general educational information and does not provide medical diagnosis, treatment, or individualized medical advice. Information on this page is not a substitute for evaluation or care from a qualified healthcare professional. Do not use this information to diagnose yourself or another person, or to start, stop, or change treatment or medication without consulting an appropriately qualified healthcare professional.

References

  • American Psychiatric Association. Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition, Text Revision (DSM-5-TR).
  • National Institutes of Health.
  • Centers for Disease Control and Prevention.
  • World Health Organization. International Classification of Diseases, 11th Revision.