Skip to Content
The NorthShoreConnect patient portal, mobile app and online scheduling will be down for scheduled maintenance from 11:00 p.m. CT Friday, June 9, to 10:00 a.m. CT Saturday, June 10th. We appreciate your understanding.
The NorthShoreConnect website and mobile app will not be accessible from 11:00 PM Saturday, June 9th, 2023 until 10:00 AM Saturday, June 10th, 2023. We apologize for any inconvenience, but as we continue to improve our product and your experience, this maintenance is essential. Thank you for your patience. Thank you, NorthShore University HealthSystem Management

Multiple Sleep Latency Test


The Multiple Sleep Latency Test determines excessive daytime sleepiness and is often used to diagnose narcolepsy. The test measures brain waves (EEG), eye movements (EOG) and muscle activity from the chin.

What to Expect        

Plan to spend the entire day. The Multiple Sleep Latency Test consists of four naps, beginning at two-hour intervals. You may sleep for only 15 minutes if you fall asleep. If you do not fall asleep, the nap will last 20 minutes.

What to do prior to the Multiple Sleep Latency Test

Most patients will require polysomnography the night before their MSLT