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  1. Respiratory Effort-Related Sleep Arousal (RERA)

    RERAs are brief awakenings from sleep caused by disrupted breathing. RERAs can cause interrupted sleep and are often associated with obstructive sleep...

  2. Surgery for Sleep Apnea

    When a person with sleep apnea can't tolerate a non-invasive treatment, medical providers often recommend surgery. Learn about the many surgeries...

  3. Long Sleepers

    Long sleepers habitually sleep more hours per night than people in their age group. Learn the causes, symptoms, and health effects of being a long sleeper....

  4. Is Memory Foam Toxic?

    Understand the chemical composition of memory foam, learn whether memory foam mattresses are safe to sleep on, and find out how to pick the right...

  5. Wakefulness After Sleep Onset

    Wakefulness after sleep onset measures time spent awake after falling asleep. Learn about how this metric of sleep quality can help you improve your...

  6. Paradoxical Sleep

    Paradoxical sleep is another name for rapid eye movement (REM) sleep. Learn about this sleep stage and discover other paradoxical sleep...

  7. Paroxysmal Nocturnal Dyspnea

    Paroxysmal nocturnal dyspnea is a shortness of breath during sleep that comes on suddenly. Learn more about the causes, signs, and when to get...

  8. Benefits of Sleeping Naked

    Could sleeping naked help improve your health? Explore the potential health and relationship benefits, and what to consider before trying...

  9. Light Sleeper: What It Means and What To Do About It

    Are you a light sleeper? Find out what might be waking you up, and get tips for improving your sleep hygiene and bedroom environment for more restful...

  10. 126 Sleep Statistics

    Explore key sleep facts and statistics, including how much people sleep, the prevalence of sleep disorders, and how sleep affects health and daily...