A series of measurements of the interval from "lights out" to sleep onset that is utilized in the assessment of excessive daytime sleepiness. Subjects are allowed a fixed number of opportunities to fall asleep during their customary awake period. Long latencies are helpful in distinguishing physical tiredness or fatigue from true sleepiness.
(MSLT) - a standardized procedure used to measure daytime sleepiness. During the test, the patient is asked to stay awake for certain lengths of time and then to take short-duration naps when requested.
The MSLT is the primary test for the diagnosis of narcolepsy. This test assesses two major components of narcolepsy: hypersomnolence and sleep onset REM periods (SOREMPs), which occur in narcolepsy but are otherwise uncommon. The mean sleep latency, or time to sleep onset, provides evidence for hypersomnolence. Using an EEG to record sleep onset during normal waking hours, it consists of four or five 20-minute nap opportunities at two-hour intervals. Normally, sleep latency is greater than 10 minutes and REM sleep does not occur. Patients with narcolepsy typically fall asleep in 5 minutes or less and will display SOREMPs during at least two of the five daytime nap periods.
is a daytime nap study following a polysomnogram.
a test used to study and document excessive daytime sleepiness by way of a series of naps at two-hour intervals.
a common sleep test given at sleep labs in the diagnosis of sleep disorders. The multiple sleep latency test records brain waves (via EEG), heart rate (via EKG), muscle activity and eye movements. Often given as a series of "nap tests".
This is a day long test where a patient is given periodic opportunities to snooze while wired up to sleep monitors, such as EEG, EKG, pulse oximeter, and more. It is used to measure daytime sleepiness over the course of a day, usually the course of a standard workday. Like a normal sleep study, it is completely noninvasive.
Test that assesses the severity of sleepiness by measuring the speed of falling asleep.
A sleep test that is used during a person's normal wake periods during the day. It is used to evaluate excessive daytime sleepiness and narcolepsy (sudden and uncontrollable onsets of sleep).
The standard test used to quantify the overall daytime sleep tendency by measuring the speed of falling asleep (sleep latency) usually in 5 tests carried out at two-hour intervals. This test also helps in the diagnosis of narcolepsy. Patients with narcolepsy often go directly from wakefulness to REM, which can be evaluated with the MSLT.
a series of multiple (usually five) naps the day after a sleep study. The average (mean) time it takes to fall asleep is measured.
Test that consists of a series of short naps during the daytime, done in the sleep lab, to measure daytime sleepiness and how fast you fall asleep; Usually given to assist in diagnosing or ruling out the possibility of Narcolepsy
The Multiple Sleep Latency Test (MSLT) is a sleep disorder diagnostic tool. It used to measure the time it takes from the start of a nap period to the first signs of sleep. The test is based on the idea that the sleepier one is the faster they will fall asleep.