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RBD is mostly associated with being male and above 50 years old even though it can be associated with anyone. Neurodegenerative disorder like Parkinson's is a risk factor. Chronic sleep disorder like narcolepsy is another association. Medications like antidepressants are one risk factor, but recent evidence shows risk factors like alcohol, smoking, and head injury are risk factors.

Risk Factors Associated to RBD

Scientists really do not know properly the actual cause of RBD apart from the animal studies. But 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.
  There is a successful treatment effective of 90% of patients without tolerance and abuse by using Clonazepam. Usually results are shown after a few nights.

Causes and Treatment of RBD

A 65-year-old man is brought to a sleep clinic by his wife. She reports that for the past year, he has been shouting, kicking, and flailing his arms during sleep, seemingly acting out vivid dreams. His medical history is significant for a recent diagnosis of Parkinson's disease and a long-standing prescription for an antidepressant. Based on this information, which factor is the most direct and significant contributor to his predisposition for this specific sleep disturbance?

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