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multiple sleep latency test (MSLT)

Indications: - sleep disturbance - excessive daytime sleepiness Procedure: 1) sleep is measured over night. 2) the following day, repeated measurements of sleep latency (time to onset of sleep) is measured at 2 hour intervals under standardized conditions 3) in narcolepsy, a decreased mean sleep latency with at least 2 sleep onset REM-periods is observed a) mean latency to sleep in narcolepsy patients is 5 minutes b) mean latency to sleep in normal individuals > 10 minutes 4) EEG, EKG & EOG (electro-oculogram) are monitored

Related

maintenance of wakefulness test

General

sleep test

References

  1. Saunders Manual of Medical Practice, Rakel (ed), WB Saunders, Philadelphia, 1996, pg 1038
  2. Harrison's Principles of Internal Medicine, 12th ed. Wilson et al (eds), McGraw-Hill Inc. NY, 1991, pg 215