narcolepsyˈnɑr kəˌlɛp si
narcolepsy (n)
English Definitions:
narcolepsy (noun)
a sleep disorder characterized by sudden and uncontrollable episodes of deep sleep
"he believes that narcolepsy is attributable to an inability to suppress REM sleep during waking"
narcolepsy (Noun)
A disorder characterized by sudden and uncontrollable attacks of deep sleep, often brief, sometimes accompanied by paralysis and hallucinations
Narcolepsy
Narcolepsy is a chronic neurological disorder caused by the brain's inability to regulate sleep-wake cycles normally. It often begins mildly and progresses over a period of time until it reaches full manifestation. People with narcolepsy often experience disturbed nocturnal sleep and an abnormal daytime sleep pattern, which often is confused with insomnia. Narcoleptics, when falling asleep, generally experience the REM stage of sleep within 5 minutes, while most people do not experience REM sleep until an hour or so later. REM sleep is where most dreams occur. One of the many problems that some narcoleptics experience is cataplexy, a sudden muscular weakness brought on by strong emotions. It often manifests as muscular weaknesses ranging from a barely perceptible slackening of the facial muscles to the dropping of the jaw or head, weakness at the knees, or a total collapse. Usually speech is slurred and vision is impaired, but hearing and awareness remain normal. In some rare cases, an individual's body becomes paralyzed and muscles become limp. Cataplexy also has a severe emotional impact on narcoleptics, as it can cause extreme anxiety, fear, and avoidance of people or situations that might elicit an attack. Some narcolepsy affected persons also experience heightened senses of taste and smell.
Narcolepsy
Narcolepsy is a long-term neurological disorder that involves a decreased ability to regulate sleep–wake cycles. Symptoms often include periods of excessive daytime sleepiness and brief involuntary sleep episodes. About 70% of those affected also experience episodes of sudden loss of muscle strength, known as cataplexy. Narcolepsy paired with cataplexy is evidenced to be an autoimmune disorder. These experiences of cataplexy can be brought on by strong emotions. Less commonly, there may be vivid hallucinations or an inability to move (sleep paralysis) while falling asleep or waking up. People with narcolepsy tend to sleep about the same number of hours per day as people without, but the quality of sleep tends to be lessened.Narcolepsy is a clinical syndrome of hypothalamic disorder, however, the exact cause of narcolepsy is unknown, with potentially several causes. In up to 10% of cases, there is a family history of the disorder. Often, those affected have low levels of the neuropeptide orexin, which may be due to an autoimmune disorder triggered in genetically susceptible individuals by infection with H1N1 influenza. In rare cases, narcolepsy can be caused by traumatic brain injury, tumors, or other diseases affecting the parts of the brain that regulate wakefulness or REM sleep. Diagnosis is typically based on the symptoms and sleep studies, after ruling out other potential causes. Excessive daytime sleepiness can also be caused by other sleep disorders such as sleep apnea, major depressive disorder, anemia, heart failure, drinking alcohol and not getting enough sleep. The accompanying cataplexy may be mistaken for seizures.While there is no cure, a number of lifestyle changes and medications may help. Lifestyle changes include taking regular short naps and sleep hygiene. Medications used include modafinil, sodium oxybate and methylphenidate. While initially effective, tolerance to the benefits may develop over time. Tricyclic antidepressants and selective serotonin reuptake inhibitors (SSRIs) may improve cataplexy.Estimates of frequency range from 0.2 to 600 per 100,000 people in various countries. The condition often begins in childhood, with males and females being affected equally. Untreated narcolepsy increases the risk of motor vehicle collisions and falls.Narcolepsy can occur anytime between early childhood and 50 years typically, however, there is no upper age limit to getting it, 15 and 36 years of age being the peak time periods of when it occurs.
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