The Lancet, Volume 348, Issue 9020, Page 71, 13 July 1996
Impact of daytime sleepiness underrated
Ann Sharpley a
Sleepiness is appropriate and desirable at the usual retiring time. However, there is also a circadian propensity to feel mildly sleepy in the early to mid afternoon (between 2.00 and 5.00 pm). Excessive daytime sleepiness is an important symptom of several chronic sleep disorders, including obstructive sleep apnoea, narcolepsy, idiopathic hypersomnia, insomnia, and periodic limb-movement disorder. It is a common but often poorly recognised health problem. The tendency to sleep is increased by s ...
http://www.thelancet.com/journals/lancet/article/PIIS0140-6736(05)64601-6/fulltext
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