REM sleep behavior disorder (RBD) is a sleep problem in which you physically or vocally act out your dreams. Cleveland Clinic calls it a parasomnia that happens in the REM stage of sleep (Cleveland Clinic). It can injure you or a bed partner. In some people it is an early sign of a brain condition, but not everyone with RBD gets one.
Not sure what REM sleep is? Read what is REM sleep. This guide is for education only and does not replace a doctor.
What Is REM Sleep Behavior Disorder (RBD)?
A 2023 medical review describes RBD as a loss of the normal muscle paralysis during REM sleep. The medical word for it is atonia (2023 review). In normal REM sleep you dream while your muscles stay still. In RBD that brake is missing, so the body follows the dream.
The same review says the behaviors usually begin after about 90 minutes of sleep. They mostly happen in the second half of the night, when REM periods are longer. To see where REM fits in the night, read stages of sleep.
RBD Symptoms: Acting Out Dreams
Cleveland Clinic lists mild twitches, talking, shouting or screaming, and kicking or punching. It also lists grabbing at the air or a bed partner, and jumping or falling out of bed. It says about 8 in 10 people with RBD have sleep-related injuries (Cleveland Clinic).
People with RBD can usually be woken easily, and they are usually alert and able to remember details of the dream. The review adds that patients typically keep their eyes closed during the events. It says a witness who can describe the behavior is essential for diagnosis (2023 review). That is why a bed partner’s account matters so much.
RBD Versus Other Sleep Problems
| Condition | How It Differs From RBD |
|---|---|
| Night terrors | People are typically hard to wake and confused afterward, unlike RBD (Cleveland Clinic) |
| Obstructive sleep apnea | Can mimic RBD; treating the apnea can eliminate the behaviors (Cleveland Clinic) |
| Nocturnal seizures | Listed among conditions that can mimic RBD (2023 review) |
| Sleep-related movement disorders | Also on the list of look-alikes (2023 review) |
| Trauma-related sleep problems | Psychiatric conditions, especially PTSD, can look similar (2023 review) |
This is why a proper test matters. See obstructive sleep apnea symptoms and sleepwalking causes. A single body jolt as you fall asleep is a different thing, covered in hypnic jerks.
Who Gets RBD, And How Common Is It?
RBD most commonly affects people over 50, and the average age of onset is 61. It can occur in children and younger adults, but that is rare (Cleveland Clinic).
The 2023 review names age over 50 as the main risk factor and says male sex may play a role. It also notes that a Swiss community study found an equal ratio of men to women. In people under 50, the rates are similar (2023 review).
Estimates of how common RBD is depend on the method. Community studies that used a sleep test found about 0.74 to 1.15 percent. Interview and questionnaire studies found 3 to 10 percent (2023 review).
Cleveland Clinic puts it at about 1 percent of the general US population and 2 percent of people aged 50 or older. It also says almost half of people with RBD do not realize they have it (Cleveland Clinic).
What Causes RBD?
Doctors describe two types. Isolated RBD arises without a known cause. Its medical name is idiopathic RBD. Secondary RBD is linked to another condition, such as type 1 narcolepsy (Cleveland Clinic). The review adds brainstem lesions that affect the control of REM atonia. It notes that RBD may be related to medicines, most often antidepressants, and to substance withdrawal (2023 review).
If you take any medicine, tell your doctor about all of them. Do not stop a medicine on your own.
RBD And Parkinson’s Disease Or Dementia
This is the part that worries people most, so here is the careful version. Cleveland Clinic says isolated RBD is closely linked to Parkinson’s disease, dementia with Lewy bodies and multiple system atrophy. RBD can be one of the earliest warning signs of these conditions. The page also says most people with isolated RBD will eventually develop a neurodegenerative condition (Cleveland Clinic).
The best numbers come from a multicentre study. It followed 1,280 people already diagnosed with isolated RBD at 24 centres. About 6.3 percent a year went on to be diagnosed with an overt neurodegenerative syndrome (Postuma et al. 2019). The 2023 review reports the same 6.3 percent a year rate, and says 73.5 percent had converted after 12 years of follow-up (2023 review).
What These Numbers Do And Do Not Mean
These figures come from people who were already diagnosed in sleep clinics. They do not apply to everyone who has had a vivid dream or a night of thrashing. They also do not cover RBD caused by medicines or sleep apnea. Cleveland Clinic notes that outcomes depend on the cause, how severe the symptoms are, and whether injuries happen or the condition is treated (Cleveland Clinic).
The Postuma abstract also lists what predicted a later diagnosis: abnormal motor testing, abnormal findings on a motor exam and loss of smell. Sleep apnea, sex and depression were not significant predictors (Postuma et al. 2019). Having RBD is not a diagnosis of Parkinson’s or dementia, and doctors can monitor you over time. See sleep and dementia risk for the wider picture.
How Is RBD Diagnosed?
You need an overnight sleep study with video, called a polysomnogram. Cleveland Clinic says it records heart rate, breathing and airflow, brain waves, eye movements, and muscle movements in the chin, arms and legs (Cleveland Clinic). The key finding is REM sleep without the normal muscle paralysis, with no better explanation.
The 2023 review starts with a detailed history from you and your bed partner. It says a video study with audio should be used to record complex movements (2023 review). Read what happens during a sleep study and how to read sleep study results. A sleep specialist usually leads the work-up.
Bedroom Safety For RBD
Making the room safe comes first. Cleveland Clinic names the main treatment goal as a safe sleeping environment for you and your bed partner (Cleveland Clinic). The sources suggest these steps:
- Remove sharp, glass and heavy objects from near the bed (Cleveland Clinic).
- Pad the corners and edges of furniture and clear the nightstand (2023 review).
- Put a mattress on the floor beside the bed, or use padded bedside rails (Cleveland Clinic).
- Put safety bars or nets on windows and balconies (2023 review).
- Place pillows between you and the headboard or nightstand. If symptoms are severe, sleeping alone in another room may be safer for your partner (Cleveland Clinic).
Cleveland Clinic also advises avoiding alcohol, which can trigger episodes and worsen the condition.
How To Prepare For A Doctor Visit
A clear account of your nights helps the doctor decide what tests you need. Ask your bed partner to write down what they see and hear, including when it happens, because the review calls a witness essential (2023 review). Home video, if your partner can record safely, is also part of the history the review describes.
Make a list of every medicine you take, and note any snoring, breathing pauses, injuries or changes in movement or thinking. Cleveland Clinic says sleep apnea can mimic RBD, so these details help sort out the cause. Your provider may refer you to a sleep specialist for the overnight study.
Is There Treatment For RBD?
Treatment aims to manage symptoms. Cleveland Clinic says the main goal is a safe sleeping environment. A doctor may prescribe medicine when safety steps are not enough (Cleveland Clinic). The 2023 review says no neuroprotective agent is currently available to slow or halt progression from isolated RBD to overt disease. It calls such treatment a future goal (2023 review).
Ask your sleep specialist about the right plan for you. Do not start, stop or change any medicine on your own.
When To See A Doctor
See a healthcare provider if you have symptoms of RBD, your partner says you act out dreams, or you or your partner are injured. Tell them too if you develop movement problems or changes in thinking.
Anyone diagnosed with isolated RBD will likely need regular check-ups to watch for related conditions (Cleveland Clinic). Sleep apnea can look like RBD, so mention snoring or witnessed breathing pauses. See the sleep apnea hub for more.
FAQs About REM Sleep Behavior Disorder
Does Everyone With RBD Get Parkinson’s Disease?
No. In the large study, about 6.3 percent a year of people already diagnosed with isolated RBD were later diagnosed with a neurodegenerative syndrome. Each person’s course differs.
Can Sleep Apnea Look Like RBD?
Yes. Cleveland Clinic says obstructive sleep apnea can mimic RBD, and treating the apnea can eliminate the behaviors.
Can Children Have RBD?
It can occur in children and younger adults, but Cleveland Clinic calls it rare. If a child moves or shouts in sleep, talk to the pediatrician.
Can Medicines Cause RBD?
Some can. The 2023 review says RBD may be related to medicines, most often antidepressants. Tell your doctor about everything you take, and do not stop a medicine on your own.
Can Alcohol Make RBD Worse?
Yes. Cleveland Clinic advises avoiding alcohol because it can trigger episodes and worsen the condition.