Find A PhysicianHome  |  Library  |  myDownstate  |  Newsroom  |  A-Z Guide  |  E-mail  |  Contact Us  |  Directions
curve gif

SUNY Downstate Sleep Disorders Center

Multiple Sleep Latency Test (MSLT)

photo of 3 people sitting in front of monitors

MSLT, also called a "nap study", is used to see how quickly a person falls asleep during the day. The MSLT is the standard way to measure the level of daytime sleepiness. A patient's brain waves, heartbeat, eye and chin movements are recorded. This study also measures how quickly and how often one enters the rapid-eye-movement (REM) stage of sleep.