Why do we doze off




















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Psychosom Med. Sanford Health. Updated October 14, American Thyroid Association. Published The lowdown on thyroid slowdown. Updated March 19, Circadian rhythm disorders. Some sleep disorders like narcolepsy and chronic insomnia can run in families, but even if you have a family connection, that does not mean you have to suffer with daytime sleepiness.

There are many treatments that can help, from antidepressants and anti-anxiety medications to pain relievers that can ease underlying issues affecting the quality of sleep. The first step in understanding why you are experiencing daytime sleepiness is to see a sleep specialist who can pinpoint potential causes of a disorder; the specialist may order blood work and daytime or nighttime sleep testing.

If you feel like you are too sleepy during the day, and it is impacting your quality of life, consider making an appointment and discussing your options for better sleep. Take the Sleep Apnea Risk Assessment. Notify me of follow-up comments by email. Hopkin, M.

Memory shuts down as you doze off. Nature Download citation. Published : 08 October Anyone you share the following link with will be able to read this content:. Sorry, a shareable link is not currently available for this article.

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Sleepy people may have a harder time comprehending speech. You have full access to this article via your institution. He may not remember a thing you say By subscribing you agree to the Terms of Use and Privacy Policy. Health Topics. Health Tools. Reviewed: September 9, Medically Reviewed. But if a child or teen habitually falls asleep in school, or an adult finds themselves constantly dozing off at work, despite sleeping enough at night, a sleep disorder may be to blame.

One such sleep problem is narcolepsy , a neurological disorder that triggers overwhelming and sudden episodes of sleep and sleepiness during the day, and potentially irregular sleep at night, too, according to the National Institute of Neurological Disorders and Stroke.

The chronic condition leaves the brain unable to regulate sleep and wake cycles, per MedlinePlus. According to the Stanford Medicine Center for Narcolepsy , narcolepsy is the second most common cause of excessive daytime sleepiness diagnosed by sleep centers, right after obstructive sleep apnea.

Such episodes can occur multiple times throughout a day and last for varying amounts of time. People will usually wake up feeling refreshed but then have another sleep attack episode after a very short period of time. People with narcolepsy experience sleep attacks because the brain is not able to properly regulate its sleep and wake cycles.

People with the condition may go right into REM rapid eye movement sleep without first entering NREM sleep non-rapid-eye-movement , and this can happen both during the night and in the daytime. The disruption of normal sleep-wake cycles leads to poor sleep at night, too, according to Harvard Medical School. While excessive daytime sleepiness persistent sleepiness during waking hours regardless of how much sleep you get the night before is a key early symptom of narcolepsy, many people who have extreme fatigue during the day may not initially suspect that they have the condition.

Several reasons may account for this:.



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