|Sleep Disorders - Narcolepsy
Narcolepsy is a chronic, or long-lasting, sleep disorder with no known cause. It affects the body's central nervous system, which is made up of nerves that carry messages from the brain to other parts of the body. When a person has narcolepsy, messages about when to sleep and when to be awake can get mixed up. This can cause a person to fall asleep when they do not want to, and often without any warning like feeling drowsy.
The desire to sleep can be overwhelming and hard to resist, and can happen to a person several times during the day. Night sleep may also be poor, broken up by waking up often during the night. If not controlled with medication, narcolepsy can cause serious problems in a person's personal, social, and work life. It can also limit a person's activities, such as driving a car, work, and exercising. Studies indicate that narcolepsy may run in families.
Symptoms of narcolepsy
While it can happen at any age, symptoms of narcolepsy most often begin between the ages of 15 and 30. The main symptoms are cataplexy and being extremely sleepy during the day, even after a good night's sleep. There are other symptoms of narcolepsy, listed below, which may not occur in all people. These symptoms often come and go. But being very sleepy during the day is a symptom that can be chronic, or long lasting. Other symptoms include waking up during the night, tossing and turning in bed, leg jerks, and nightmares.
- Cataplexy - sudden loss of muscle control, ranging from slight weakness (such as limpness at the neck or knees, sagging facial muscles, or slurred speech) to complete body collapse. Attacks can be triggered by sudden and strong emotions such as laughter, anger, or fear. Attacks can last from a few seconds to several minutes.
- Sleep paralysis - not being able to talk or move when falling asleep or waking up. This is temporary and may last from a few seconds to several minutes.
- Hypnagogic hallucinations - seeing things that are not there. These images can seem very vivid and dreamlike and sometimes scary. They happen when a person is dozing or falling asleep.
- Automatic behavior - doing tasks that are familiar, routine, or boring without knowing that you are doing them. For example, getting to work with no memory of actually driving there.
Will I get narcolepsy?
Some 200,000 Americans are thought to have narcolepsy. It is sometimes mistaken for depression, epilepsy, or the side effects of medications.
You should be checked by a sleep medicine specialist for narcolepsy if:
- You often feel extremely sleepy during the day, even after having had a full night's sleep.
- You fall asleep when you do not want to, such as while having dinner, talking, driving, or working.
- You collapse suddenly or your neck muscles feel too weak to hold up your head when you laugh or become angry, surprised, or shocked.
- You are not able to talk or move for a short period of time when falling asleep or waking up.
After having a complete medical history and physical exam, a person's doctor may order further tests. It is important to see a sleep medicine specialist at a sleep center such as PM Sleep Lab for evaluation, since narcolepsy can be hard to diagnose and treat effectively. It can be mistaken for other conditions like depression and epilepsy, or the side effects of medications.
Two common tests for narcolepsy are:
- Polysomnogram - records brain activity and body movements during nighttime sleep, along with nerve and muscle function. This test is done in an overnight sleep lab.
- Multiple Sleep Latency Test - a person is given a chance to sleep every two hours during the day, when they are normally awake. This test measures the time it takes to fall asleep and the time it takes to go into rapid eye movement (REM) sleep (dreaming).
There is no cure for narcolepsy . It is a life-long condition, but there is help for a person with this condition to have a good and productive life. Symptoms can be controlled with medicine and lifestyle changes. The extreme daytime sleepiness can be treated with stimulant drugs (or drugs that keep you awake) such as modafinil (Provigil). Caffeine and over-the-counter stimulants do not work to reduce daytime sleepiness. Antidepressants are sometimes used to treat cataplexy, hypnagogic hallucinations, and sleep paralysis.
People with narcolepsy who have other health conditions, such as high blood pressure, diabetes, or heart disease, should talk with their doctor about other medicines they are taking. Some over-the-counter and prescription drugs may interact with those drugs taken for narcolepsy.
Changes in lifestyle can help to treat and control narcolepsy. Taking daytime naps and developing good sleep habits are important. Taking short naps (10 to 15 minutes) 2 to 3 times a day can help control extreme daytime sleepiness and sleep attacks. Having good sleep habits helps a person to get good quality nighttime sleep. What helps is to: not have caffeine or alcohol and not smoke in the late afternoon or evening; get regular exercise, but don't exercise up to 3 hours before you go to bed; don't use your bed for anything but sleeping and physical intimacy; and get enough sleep (around 8 hours) every night.
If you have narcolepsy, it is important to talk on a regular basis with your health care provider. This will help you to get the best treatment possible for your symptoms.
Talk with your health care provider often. Tell her/him about any changes in your symptoms or what you are experiencing in daily life. Let her/him know about any side effects you may be having from medications you are taking for narcolepsy or other conditions.
Don't forget to schedule regular nap times during the day, exercise regularly, and make sure you get enough sleep (around 8 hours) every night.
Avoid jobs that require driving long distances or handling hazardous equipment, or that need you to be alert for long times.
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