Sleep

More than 70 types of sleep disorders exist. The most common problems are insomnia (difficulty falling or staying asleep), obstructive sleep apnea (disordered breathing that causes multiple awakenings), various movement syndromes (unpleasant sensations that prompt night fidgeting), and narcolepsy (extreme sleepiness or falling asleep suddenly during the day). Type of sleep disorder, prevalence, and impact …

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