Multiple Sleep Latency Test (MSLT) | Maintenance of Wakefulness Test (MWT) | Dutchess County | Westchester County
19 Bradhurst Avenue, Suite 2850  |  Hawthorne, New York 10532
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Diagnostic Services

Multiple Sleep Latency Test

Multiple Sleep Latency Test (MSLT) | Maintenance of Wakefulness Test (MWT)  | Duchess County | Westchester CountyA multiple sleep latency test (MSLT) is a type of sleep study that takes place during the daytime. It is used to measure your level of sleepiness. Frequently performed the day after a polysomnogram, it usually begins about two hours after awakening in the morning. Electrodes are attached to certain locations on your head, and over the course of an approximately 15 to 30 minute period, you will lay resting in a quiet, darkened room. A technician monitors your brain activity and oxygen levels as well as how long it takes for you to fall asleep.

When you fall asleep during the testing, the MSLT will show the stages of sleep you enter and their duration. It can determine whether you are experiencing rapid eye movement (REM) sleep or non-rapid eye movement (Non-REM) sleep. The type of sleeping you do during a daytime test such as the MSLT can help your doctor to diagnose whether you have a sleep disorder. It aids in the identification of problems such as narcolepsy, which is a chronic sleep disorder involving excessive sleepiness and actually falling asleep during the daytime despite receiving sufficient amounts of sleep at night, and idiopathic hypersomnia, which is a sleep disorder resulting in constant sleepiness during the day with no identifiable cause of the fatigue.

The MSLT is typically performed five times throughout one day at two hour intervals. This allows for differences in the ability to fall asleep at various times in the day. People who do not have a sleep disorder will usually be able to stay awake during the entire study or will not fall asleep during each session of an MSLT. If you fall asleep during the testing, you will be awakened when that session is over and will need to remain awake until the next session begins.

Call us today at (914) 345-1313 for more information about a
Multiple Sleep Latency Test

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Maintenance of Wakefulness Test

Maintenance of Wakefulness Test (MWT) | Duchess County | Westchester CountyA type of sleep study, the maintenance of wakefulness test (MWT) is often used to diagnose disorders such as sleep apnea, as a precaution for those employed in transportation or safety-oriented jobs or to assess how well a patient is responding to treatment for a known sleeping disorder. The MWT is typically performed the day after a polysomnogram and is used to determine your ability to remain awake during the daytime hours.

After electrodes are applied to various points on the head and face, the patient is seated on a bed or chair in a quiet room with dim lighting. The goal is to remain awake as long as possible while just sitting and looking straight ahead. The electrodes are used to measure brain activity, muscle movement, heart rate, eye motion and sleep stages if the patient does fall asleep.

The sessions of the study are usually conducted four times throughout the day for approximately 40 minutes every two hours. In between sessions, the patient should not sleep at all. The test will help establish how alert the patient is at different points in the day.

Sleep studies are often performed on those who feel excessively tired during the day, even when they have been sleeping enough to warrant feeling well rested. Symptoms of sleep disorders can include taking more than 30 minutes to fall asleep at night, waking during the night and having trouble falling back asleep, waking up too early and being unable to fall back to sleep, daytime sleepiness with the ability to fall asleep within five minutes for a nap, falling asleep during inappropriate times of the day and needing caffeine or other stimulants to stay awake during the day. If you are experiencing these symptoms and they are affecting your daily activities, speak with your physician about whether you might benefit from a sleep study.

Call us today at (914) 345-1313 for more information about a
Maintenance of Wakefulness Test

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