Excessive daytime sleepiness could also be caused by sleep deprivation, the use of sedating medicines and sleep apnea. These tests also can help rule out other possible causes of your symptoms. This test is only done in specialized centers. If so, your sleep specialist may recommend a lumbar puncture to check the level of hypocretin in your spinal fluid. Occasionally, a genetic test may be performed to see if you're at risk of type 1 narcolepsy. Genetic tests and a lumbar puncture, known as a spinal tap.People who have narcolepsy fall asleep easily and enter into rapid eye movement (REM) sleep quickly. Specialists will observe your sleep patterns. You'll be asked to take four or five naps at a sleep center. This test measures how long it takes you to fall asleep during the day. It also records your leg and eye movements. The test measures your brain waves, heart rate and breathing. For this test, you must spend a night at a medical facility. This test measures signals during sleep using flat metal discs called electrodes placed on your scalp. A sleep study, known as polysomnography.It provides an indirect measure of how and when you sleep. It measures periods of activity and rest. Your health care provider also may ask you to wear an actigraph. This allows your provider to compare how your sleep pattern may relate to how alert you feel. You may be asked to write down your sleep pattern for a week or two. You'll answer how likely it is that you would fall asleep in certain times, such as sitting down after lunch. The scale uses short questions to measure your degree of sleepiness. You'll likely fill out the Epworth Sleepiness Scale. A detailed sleep history can help with a diagnosis. A sleep specialist will likely diagnose narcolepsy and determine how severe it is based on:
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