The sleep disorder characterized by persistent excessive daytime sleepiness,cataplexy,hypnagogic hallucinations,and sleep paralysis is

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RLS is recognized as a chronic,progressive neurologic disorder characterized by unpleasant sensations in the legs and a compelling urge to move the legs while the patient is awake.These symptoms occur most frequently during the evening or at night and during periods of rest.Insomnia is characterized by difficulty in falling asleep (i.e. ,a sleep latency of >30 minutes),insufficient sleep (i.e. ,total sleep time <5.5 to 6 hours),multiple nocturnal awakenings,early morning awakening with inability to resume sleep,or nonrestorative sleep.Narcolepsy is characterized by a tetrad of clinical symptoms.Two features of the tetrad-persistent excessive daytime sleepiness and cataplexy-were documented in the original descriptions of the disorder and remain the only two clinical features essential for diagnosis.Two additional features-hypnagogic hallucinations (the onset of dreams while still awake)and sleep paralysis (a temporary loss of muscle tone or an inability to perform voluntary movements either at sleep onset or on awakening)-were added later.Another common symptom of narcolepsy is fragmented sleep with multiple arousals and awakenings at night.Parasomnias are undesirable motor,sensory,or behavioral phenomena that occur primarily during sleep.

The Sleep Disorder Characterized by Persistent Excessive Daytime Sleepiness,cataplexy,hypnagogic Hallucinations,and