A sleep disorder characterized by difficulty in falling asleep or remaining asleep throughout the night is

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Insomnia is the sleep disorder that is characterized by difficulty in falling asleep or remaining asleep throughout the night. Parasomnia refers to abnormal behaviors during sleep, hypersomnia is excessive daytime sleepiness, and REM disorder is a disorder where a person acts out their dreams during REM sleep.

A Sleep Disorder Characterized by Difficulty in Falling Asleep or Remaining