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Multiple Sleep Latency Test

If you have classic symptoms of narcolepsy, such as involuntary sleep attacks and weakness attacks, diagnosis of your disorder may be simple. If your doctor isn’t sure whether your symptoms are caused by narcolepsy, other tests may be ordered, such as a Multiple Sleep Latency Test.

This test is usually done the day after a polysomnogram. With the same set of electrodes still attached, you’ll be asked to take a series of 20-minute naps, every 2 hours throughout the day. The electrodes collect information about how quickly you fall asleep and how quickly you reach various levels of sleep, particularly rapid eye movement (REM) sleep. Questionnaires will also be used.

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