Sign Up for a Free Account

This is an image preview.
Start a Free Account
to view the full image.

Sign Up for a Free Account For information on discounts, see Plans & Pricing

  • Nearly 3,000 illustrations, including video clips of neurologic disorders.

  • Every article is reviewed by our esteemed Editorial Board for accuracy and currency.

  • Full spectrum of neurology in 1,200 comprehensive articles.

  • Listen to MedLink on the go with Audio versions of each article.

Narcolepsy (polysomnogram)

Sleep-onset REM during a multiple sleep latency test in a 12-year-old girl with complaints of irresistible daytime sleep episodes. The child is asleep within the first few seconds of the recording. Rapid eye movements along with muscle atonia and low-voltage EEG without spindles, characteristic of REM sleep, are present after 15 seconds of sleep. The child entered REM sleep within the first few minutes of sleep during each of the 5 nap test periods and was diagnosed with narcolepsy. (Contributed by Dr. Michael Aldrich.)

Related Media