Can you act out your dream?

 REM Sleep Behavior Disorder

Rapid eye movement (REM) sleep behavior disorder is a sleep disorder in which you physically act out vivid, often unpleasant dreams with vocal sounds and sudden, often violent arm and leg movements during REM sleep — sometimes called dream-enacting behavior.

The onset of REM sleep behavior disorder is often gradual and it can get worse with time.

REM sleep behavior disorder may be associated with other neurological conditions, such as Lewy body dementia (also called dementia with Lewy bodies), Parkinson's disease or multiple system atrophy.

What are the Symptoms?

With REM sleep behavior disorder, instead of experiencing the normal temporary paralysis of your arms and legs (atonia) during REM sleep, you physically act out your dreams.

The onset can be gradual or sudden, and episodes may occur occasionally or several times a night. The disorder often worsens with time.

Symptoms of REM sleep behavior disorder may include:

• Movement, such as kicking, punching, arm flailing or jumping from bed, in response to action-filled or violent dreams, such as being chased or defending yourself from an attack
• Noises, such as talking, laughing, shouting, emotional outcries or even cursing
• Being able to recall the dream if you awaken during the episode

Nerve pathways in the brain that prevent muscles from moving are active during normal REM or dreaming sleep, resulting in temporary paralysis of your body. In REM sleep behavior disorder, these pathways no longer work and you may physically act out your dreams.

Are you at risk?

Factors associated with the development of REM sleep behavior disorder include:

• Being male and over 50 years old — however, more women are now being diagnosed with the disorder, especially under age 50, and young adults and children can develop the disorder, usually in association with narcolepsy, antidepressant use or brain tumors
• Having a certain type of neurodegenerative disorder, such as Parkinson's disease, multiple system atrophy, stroke or dementia with Lewy bodies
• Having narcolepsy, a chronic sleep disorder characterized by overwhelming daytime drowsiness
• Taking certain medications, especially newer antidepressants, or the use or withdrawal of drugs or alcohol

Recent evidence suggests that there may also be several specific environmental or personal risk factors for REM sleep behavior disorder, including occupational pesticide exposure, farming, smoking or a previous head injury.

What are the Complications?

Complications caused by REM sleep behavior disorder may include:

• Distress to your sleeping partner or other people living in your home
• Social isolation for fear that others may become aware of your sleep disruption
• Injury to yourself or your sleeping partner

Diagnosis

• Physical and neurological exam 
• Talking with your sleeping partner.  
• Nocturnal sleep study (polysomnogram). During this test, sensors monitor your heart, lung and brain activity, breathing patterns, arm and leg movements, vocalizations, and blood oxygen levels while you sleep. Typically, you'll be videotaped to document your behavior during REM sleep cycles.

Treatment

Physical safeguards

• Padding the floor near the bed
• Removing dangerous objects from the bedroom, such as sharp items and weapons
• Placing barriers on the side of the bed
• Moving furniture and clutter away from the bed
• Protecting bedroom windows
• Possibly sleeping in a separate bed or room from your bed partner until symptoms are controlled

Medications

• Melatonin. Your doctor may prescribe a dietary supplement called melatonin, which may help reduce or eliminate your symptoms. Melatonin may be as effective as clonazepam and is usually well-tolerated with few side effects.
• Clonazepam (Klonopin). This prescription medication, often used to treat anxiety, is also the traditional choice for treating REM sleep behavior disorder, appearing to effectively reduce symptoms. Clonazepam may cause side effects such as daytime sleepiness, decreased balance and worsening of sleep apnea.

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