Which disorder is a common sleep movement disorder in which a person has unpleasant sensations in the legs and an irresistible urge to move them to relieve the pain?

Question

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Restless leg syndrome is a sleep movement disorder characterized by unpleasant sensations in the legs and an urge to move them in order to relieve the discomfort. Periodic limb movement in sleep is a separate disorder that involves repetitive limb movements during sleep. Cataplexy is a symptom of narcolepsy, in which a person experiences sudden weakness or loss of muscle tone, but it is not a sleep movement disorder. Sleep apnea is a disorder characterized by interruptions in breathing during sleep.

Which Disorder Is a Common Sleep Movement Disorder in Which