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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.
You normally don't move during REM sleep, a normal stage of sleep that occurs many times during the night. About 20 percent of your sleep is spent in REM sleep, the usual time for dreaming, which occurs primarily during the second half of ...
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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:
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.
Treatment for REM sleep behavior disorder may include physical safeguards and medications.
Your doctor may recommend that you make changes in your sleep environment to make it safer for you and your bed partner, including:
For informational purposes only and not a substitute for professional medical advice, diagnosis, or treatment.
© Mayo Clinic
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