Feature of narcolepsy
The hallmark of this disorder is decreased REM latency, i.e. decreased latent period before the first REM period occurs. Normal REM latency is 90-100 minutes. In narcolepsy, REM-sleep usually occurs within 10 minutes of the onset of sleep. The common age of onset is 15-25 years, with usually a stable course throughout life. Ref: A Sho Textbook of Psychiatry, Niraj Ahuja, 7th Edition, pg. no. 138
Increased sleep time
Decreased REM sleep latency
Increase in muscle tone
None of the above
Sleep disorders and eating disorders