During a sleep study, wires attached to the head monitor brain waves that reveal which stage of sleep a person is in.
Primary care physicians can evaluate a person's situation for possible sleep apnea and recommend testing at a special sleep study center if needed.
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.
Our collective weariness is the subject of several new books, some by professionals who study sleep, others by amateurs who are short of it.
After sleeping for only four hours, people tend to eat more calories on the following day than when they get a good night's sleep, the study found.
New technologies have made the study of sleep cheaper, easier, and less intrusive.
They're also three times more likely to be depressed than their alert classmates who get enough sleep, a new study has found.
To account for the sleep variable, researchers in this study kept close tabs on the duration and quality of sleep of the participants.
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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.
On the pro sleep-training side, an Australian study published in September followed 326 children with parent-reported sleep problems at 7 months.
"Exercisers fall asleep faster, suffer fewer middle-of-the-night wake-ups and have a reduced risk of sleep disorders, " says study co-author Brad Cardinal, co-director of the sport and exercise psychology program at Oregon State University.
For the study, very short sleep patterns were defined as less than five hours a night, short sleep was five to six hours a night, standard sleep was seven to eight hours, and long sleep was nine or more hours a night.
Earlier bedtimes could help protect adolescents against depression and suicidal thoughts, according to a new study published in the journal Sleep.
Dr Irshaad Ebrahim, a consultant sleep physician, told the BBC the study relected just how hectic children's lives were in the information age.
Why rhythmic rocking leads to better sleep went beyond the scope of the study, though the authors have several ideas based on the recent literature.
He points out that of 521 patients who took the drug in a safety study, 2 had forms of sleep paralysis, which can be a symptom of narcolepsy.
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After many years of study, no one knows how much sleep we need to function normally.
However, the actual cause of the connection between sleep and rocking was beyond the scope of the study.
The study offers "one more data point that sleep-deprived people have more weight issues, " Lundberg adds.
There was no link between sleep and cancer risk in the other women in the study, particularly in those older than 65.
He said many people may be even more sleep deprived in their daily lives than those in the study - suggesting these changes may be common.
Another study of 119 cancer patients with difficulty sleeping found valerian before bedtime for two months had no significant effect on sleep scores calculated from a questionnaire filled out before the study and after two months.
In a company-funded study published last year in the Journal of Sleep Research, the Zeo predicted the same sleep cycle as professional sleep equipment in a lab about 75% of the time, compared with 86% agreement for two independent professional lab measures with each other.
Participants in the study were measured as moving more quickly into a sleep state and enhanced that sleep once it started.
Study subjects who had less than seven hours of sleep were at greater risk than those who got eight hours of sleep a night.
Maybe we all might have gotten a lot more sleep had we known about recent results of another GRACE satellite study published in the journal Nature that shows that Himalayan glaciers are hardly melting at all.
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It's not clear from this study whether cancer risk is truly affected by lack of sleep, says Rapoport, but it is certainly a possibility.
"This area of research into the possible link between sleep apnea and heart disease is very much an emerging field of study, " Dr. Somers says.
Thirty percent of the teens had strong symptoms of depression, while an additional 32 percent had some depression symptoms, according to the study, which was presented today in San Antonio at SLEEP 2010, an annual meeting of sleep researchers.
Adds psychologist Susan Zafarlotfi, a sleep disorder specialist at Hackensack University Medical Center: "This study shows that CBT as compared to pharmacotherapy works much better ... pharmacotherapy is only a crutch, " while CBT aims to fix the distorted behavior and thought patterns that cause the disorder.
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