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Snoozing worms help Penn researchers explain the evolution of sleep
The roundworm C. elegans, a staple of laboratory research, may be key in unlocking one of the central biological mysteries: why we sleep. Researchers at the University of Pennsylvania School of Medicine report in this week's advanced online edition of Nature that the round worm has a sleep-like state, joining most of the animal kingdom in... view more... (2008-01-14)
Late weekend sleep among teens may lead to poor academic performance
Teenagers who stay up late on school nights and make up for it by sleeping late on weekends are more likely to perform poorly in the classroom. view more (2007-06-13)
Studies find stable sleep patterns and regular routines may improve outcomes in bipolar disorder
Bipolar disorder, commonly known as manic-depressive disorder, is highly influenced by the circadian system - the body's internal clock - and a specific kind of psychotherapy may help decrease irregularities in the circadian system that can trigger key symptoms of bipolar disorder. view more (2007-12-10)
26 percent of sleepless children become overweight
Between the ages of six months and six years old, close to 90 percent of children have at least one sleep-related problem. Among the most common issues are night terrors, teeth-grinding and bed-wetting. view more (2008-11-19)
Study links primary insomnia to a neurochemical abnormality in young and middle-aged adults
A study in the Nov. 1 issue of the journal Sleep is the first demonstration of a specific neurochemical abnormality in adults with primary insomnia, providing greater insight to the limited understanding of the condition's pathology. view more (2008-11-03)
Television watching before bedtime can lead to sleep debt
According to a research abstract that will be presented on Monday, June 8, at SLEEP 2009, the 23rd Annual Meeting of the Associated Professional Sleep Societies, television watching may be an important determinant of bedtime, and may contribute to chronic sleep debt. view more (2009-06-08)
Insomnia with short sleep duration is a risk factor for diabetes
Individuals with insomnia and objective short sleep duration are at increased risk for developing diabetes. view more (2009-06-09)
Type of anesthetic will improve sleeping medication, probe mysteries of the snooze
Researchers at the University of Alberta have discovered sleep patterns in a type of anesthesia that are the closest ever to a natural, non-groggy snooze. view more (2008-04-17)
Negative effects of caffeine are stronger on daytime sleep than on nocturnal sleep
A new study at the Université de Montréal has concluded that people drinking coffee to get through a night shift or a night of studying will strongly hurt their recovery sleep the next day. view more (2006-10-03)
Maternal depression is associated with significant sleep disturbance in infants
A study in the May 1 issue of the journal SLEEP suggests that babies born to mothers with depression are more likely to suffer from significant sleep disturbances at 2 weeks postpartum that continue until 6 months of age. view more (2009-05-01)
Restless nights put older adults at risk for depression recurrence
Nearly 60 percent of the nation's elderly have trouble sleeping, whether it's a lot of tossing and turning or outright bouts of insomnia. While for most people sleeplessness can be annoying at best or unhealthy at worst, for elderly individuals who have suffered from depression in the past, poor sleep may be the first sign that a new bout of... view more... (2008-09-30)
Lack of sleep activates body's defence mechanisms
A lack of sleep is considered a threat situation, which activates the body's defence mechanisms. This is the same type of response that protects the body against viruses and bacteria as well as in stress situations. view more (2005-03-16)
Study finds increased 'sibling risk' of obstructive sleep apnea in children
A study in the Aug. 1 issue of the journal SLEEP indicates that children have an increased risk of developing obstructive sleep apnea (OSA) if they have at least one sibling who has been diagnosed with the sleep disorder. view more (2009-08-03)
Exploring the function of sleep
Is sleep essential? Ask that question to a sleep-deprived new parent or a student who has just pulled an "all-nighter," and the answer will be a grouchy, "Of course!" view more (2008-08-26)
A low expression of MX2 gene exists in the white blood cells of narcoleptics
The first report to identify the biological markers of narcolepsy using gene expression in white blood cells finds that the MX2 gene, which is relevant to the immune system, is significantly less expressed in narcoleptics compared with normal subjects. view more (2007-08-01)
Insomniacs pay higher health-care costs than noninsomniacs
A research abstract that will be presented Monday at SLEEP 2007, the 21st Annual Meeting of the Associated Professional Sleep Societies (APSS) finds that the health care costs of patients with insomnia are higher than for those without insomnia. view more (2007-06-11)
Sleep strengthens memories and makes them resistant to interfering information
Researchers have uncovered new evidence that sleep improves the brain's ability to remember information. Their findings demonstrate that memories of recently learned word pairs are improved if sleep intervenes between learning and testing and that this benefit is most pronounced when memory is challenged by competing information. view more (2006-07-11)
Older adults less affected by sleep deprivation than younger adults during cognitive performance
Older adults are able to retain better cognitive functioning during sleep deprivation than young adults. view more (2009-06-10)
Eye conditions linked with obstructive sleep apnea
If a good night's sleep helps the brain and body perform better, it's a good guess that sleep problems can cause more than just fatigue. Numerous studies have shown a connection between sleep disorders and medical conditions such as cardiovascular disease, cerebrovascular disease, and metabolic disorders, including the risk of obesity and diabetes... view more... (2008-11-11)
Socioeconomic status, gender and marital status influence sleep disturbances
Increased sleep disturbances are associated with lower education, income or being unmarried or unemployed. Disturbances are much more likely in multiracial individuals. view more (2009-06-10)
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