Shelby Harris, director of the Behavioral Sleep Medicine Program at Montefiore Medical Center in Bronx, N.
The report is published in New Scientist, and is due to appear in the journal Sleep Medicine.
Professor John Stradling, of the Oxford Centre for Sleep Medicine said these kind of sleep disorders were very rare.
According to the American Academy of Sleep Medicine, there are 81 chronic sleeping disorders, from apnea, which causes interrupted breathing, to restless leg syndrome.
Jet Lag Rooster is an online calculator that employs similar guidelines to those used at academic institutions such as the Mayo Center for Sleep Medicine in Minnesota and Rush University Medical Center in Chicago.
The students reported sleeping an average of about six hours on school nights and eight hours on the weekend, far less than the nine hours a night--at least--that the American Academy of Sleep Medicine recommends for high school students.
Expert advice: "The good news is that Meredith's insomnia seems to have a clear precipitant -- the breakup, " says sleep-medicine specialist David Neubauer, M.
After reading about a circulating water cooling cap that was used in a University of Pittsburgh School of Medicine sleep study, the girls set about creating a cheaper, lighter, and less onerous solution the cooling headband.
I'd get seven hours of shut-eye a night because a six-year, large-scale population study of sleep done at the University of California, San Diego School of Medicine associated it with the lowest death rate among adults.
Sleep, even now a mystery in many ways to science and medicine, was utterly obscure to the doctors of his time, who were still struggling to understand what went on in plain sight in the day.
John Stradling, professor of respiratory medicine at the Oxford Centre for Respiratory Medicine, told BBC News Online said the Quebec findings fitted in with what he had suspected about sleep apnoea's links with psychological illness.
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