![]() You may also have a blood test to find out whether you have a genetic marker known as HLA DQB * 0602, which is associated with narcolepsy.Ī positive result supports a diagnosis, but does not make it 100% certain – 30% of people without narcolepsy also have the genetic marker. If you have narcolepsy, you'll usually fall asleep easily and enter rapid eye movement (REM) sleep very quickly. You'll be asked to take several naps throughout the day, and a specialist will analyse how quickly and easily you fall asleep. You may have this test after polysomnography. Multiple sleep latency testĪ multiple sleep latency test measures how long it takes for you to fall asleep during the day. ![]() Sound recording and video equipment may also be used to record sound and images.Īfter you have slept, a specialist will analyse your test results to determine whether you have normal brain wave activity, breathing patterns, and muscle and eye movement.
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