Multiple Sleep Latency
The Multiple Sleep Latency Test (MSLT) is a "nap" study conducted on the day following your Polysomnogram (PSG) study. The MSLT begins 2 hours after your normal rise time and is a series of 4 to 5 naps at 2-hour intervals in-between naps. Your sleep patterns will be monitored with most of the same recording equipment used during the polysomnogram.
The Maintenance of Wakefulness Test (MWT) is a daytime study following the evening of your sleep study. It begins 2 hours after your normal rise time and involves a series of tests at set intervals throughout the day. You will be monitored with most of the same recording equipment as used in the overnight polysomnogram. During this test, you will be instructed to stay awake during the "nap" opportunities.
Both tests provide an objective measure of your degree of daytime sleepiness.
Preparing for the Test
Two Weeks Before the Test
Contact the Sleep Resource Coordinator at 312-926-5091 if you are taking any medications that affect your sleeping patterns.
Two Days Before the Test
If you are ill (particularly head or chest cold), call 312-926-8120 to reschedule your test.
On the Day of your Study
What to Bring