The two major categories of primary sleep disorders are __________.

Question

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The two major categories of primary sleep disorders are parasomnias and dyssomnias. Parasomnias involve abnormal movements, behaviors, emotions, perceptions, or dreams that occur while falling asleep, sleeping, between sleep stages, or during arousal from sleep. Dyssomnias pertain to disorders that cause difficulty initiating or maintaining sleep or excessive sleepiness.

The Two Major Categories of Primary Sleep Disorders Are __________