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Sleep in Biological News

When it comes to sleep research, fruit flies and people make unlikely bedfellows

You may never hear fruit flies snore, but rest assured that when you're asleep they are too. According to research published in the January 2009 issue of the journal GENETICS ( http://www.genetics.org ), scientists from the University of Missouri-Kansas City have shown that the circadian rhythms...

Study helps explain connection between sleep apnea, stroke and death

BETHESDA, Md. (Jan. 6, 2009) − Obstructive sleep apnea decreases blood flow to the brain, elevates blood pressure within the brain and eventually harms the brain's ability to modulate these changes and prevent damage to itself, according to a new study published by The American Physiological...

Practice as well as sleep may help birds learn new songs

Practice as well as sleep may help birds learn new songs The reorganization of neural activity during sleep helps young songbirds to develop the vocal skills they display while awake, University of Chicago researchers have found. Sleep is well known to have a role in a broad range of learn...

What a sleep study can reveal about fibromyalgia

Research engineers and sleep medicine specialists from two Michigan universities have joined technical and clinical hands to put innovative quantitative analysis, signal-processing technology and computer algorithms to work in the sleep lab. One of their recent findings is that a new approach to ...

Caloric intake negatively influences healthy adults' sleep patterns

WESTCHESTER, Ill. Caloric intake negatively influences sleep patterns in healthy adults, according to a research abstract that will be presented on Tuesday at SLEEP 2008, the 22nd Annual Meeting of the Associated Professional Sleep Societies (APSS). The study, authored by Ion Zalcman, of Feder...

Fat intake negatively influences the sleep pattern in healthy adults

WESTCHESTER, Ill. Total fat intake and dinner fat intake seem to influence negatively the sleep pattern in healthy adults, according to a research abstract that will be presented on Tuesday at SLEEP 2008, the 22nd Annual Meeting of the Associated Professional Sleep Societies (APSS). The study,...

Gene mutations in mice mimic human-like sleep disorder, UT Southwestern researchers find

DALLAS May 20, 2008 Mutations in two genes that control electrical excitability in a portion of the brain involved in sleep create a human-like insomnia disorder in mice, UT Southwestern Medical Center researchers have found. The findings may help scientists better understand the disorder and pr...

4 days of REM sleep deprivation contributes to a reduction of cell proliferation in rats

WESTCHESTER, Ill. Four days exposure to a REM sleep deprivation procedure reduces cell proliferation in the part of the forebrain that contributes to long-term memory of rats, according to a study published in the February 1 issue of the journal SLEEP. The study, authored by Dennis McGinty, Ph...

Journal Sleep: Insomniacs are more likely to report a family history of the sleep disorder

WESTCHESTER, Ill. Individuals with either current or past insomnia are more likely to report a family history of insomnia than are those who have never had the sleep disorder, according to a study published in the December 1 issue of the journal SLEEP. The study, authored by Simon Beaulieu-Bon...

Ohio scientists develop blue-blocking glasses to improve sleep and ADHD symptoms

Scientists at John Carroll University, working in its Lighting Innovations Institute, have developed an affordable accessory that appears to reduce the symptoms of ADHD. Their discovery also has also been shown to improve sleep patterns among people who have difficulty falling asleep. The John Ca...

Alcohol and sleep restriction can affect young men's alertness and driving performance

WESTCHESTER, Ill. Combining low-dose alcohol with moderate sleep restriction can have a significant adverse effect on young mens subjective alertness and performance behind the wheel, according to a study published in the October 1 issue of the journal SLEEP. The study, authored by Andrew Vaku...

NC State study finds genes important to sleep

For many animals, sleep is a risk: foraging for food, mingling with mates and guarding against predators just aren't possible while snoozing. How, then, has this seemingly life-threatening behavior remained constant among various species of animals? A new study by scientists at North Caroli...

What happens when we sleep

This release is available in French . Lack of sleep is a common complaint but for many, falling asleep involuntarily during the day poses a very real and dangerous problem. A new study from the Montreal Neurological Institute (MNI) at McGill University demonstrates interestingly, that sle...

Snoozing worms help Penn researchers explain the evolution of sleep

PHILADELPHIA 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 weeks advanced online edition of Nature that the round worm has a...

Longer treatment benefits sleep apnea patients

WHAT: Adults with obstructive sleep apnea benefit significantly from longer nightly use of continuous positive airway pressure (CPAP), a device to improve breathing during sleep, according to a new study supported by the National Heart, Lung, and Blood Institute (NHLBI) of the National Institute...

College students who pull 'all-nighters' and get no sleep more likely to have a lower GPA

A common practice among many college students involves "pulling all-nighters", or a single night of total sleep deprivation, a practice associated with lower grade-point averages compared to those who make time for sleep, according to a research abstract that will be presented Wednesday at SLEEP 2...

Individual differences in a clock gene predict decline of performance during sleep deprivation

People are known to differ markedly in their response to sleep deprivation, but the biological underpinnings of these differences have remained difficult to identify. Researchers have now found that a genetic difference in a so-called clock gene, PERIOD3, makes some people particularly sensitive to...

Children who sleep more weigh less

Children who sleep more tend to weigh less than children who sleep less, and they are less likely than their counterparts to be overweight five years later. That’s one of the major findings of a new study published in the January/February 2007 issue of the journal Child Development. Conducted by ...

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. The study published in the current issue of Neuropsychopharmacology was conducted by Dr. Julie Carrier from t...

Serotonin, acting in a specific brain region, promotes sleep in fruit flies

Researchers have found that the neurotransmitter serotonin, known to affect many behaviors, also appears to promote lasting, quality sleep in an animal model for understanding how sleep is regulated. While central to the lives of most animals, the proper regulation sleep remains a largely enigmatic...

Losing sleep undoes the rejuvenating effects new learning has on the brain

As the pace of life quickens and it becomes harder to balance home and work, many people meet their obligations by getting less sleep. But sleep deprivation impairs spatial learning -- including remembering how to get to a new destination. And now scientists are beginning to understand how that h...

Morning grogginess more debilitating than sleep deprivation, according to CU-Boulder study

A new University of Colorado at Boulder study shows that people who awaken after eight hours of sound sleep have more impaired thinking and memory skills than they do after being deprived of sleep for more than 24 hours. The study showed test subjects had diminished short-term memory, counting sk...

Nighttime Dying Linked To Sleep Apnea From Brain Cell Loss

UCLA biochemists reveal the first structural details of a family of mysterious objects called microcompartments that seem to be present in a variety of bacteria. The discovery was published Aug. 5 in the journal Science. "This is the first look at how microcompartments are built, and what the pie...

Flies on speed offer insight into the roles of dopamine in sleep and arousal

Methamphetamine, the drug of choice for long-distance truckers and college students pulling all-nighters, appears to do a similar trick for fruit flies, too. This finding is one of several in a new study that demonstrates a critical role for the neurotransmitter dopamine in the modulation of sleep,...

Deep sleep short-circuits brain's grid of connectivity

In the human brain, cells talk to one another through the routine exchange of electrical signals. But when people fall into a deep sleep, the higher regions of the brain - regions that during waking hours are a bustling grid of neural dialogue - apparently lose their ability to communicate effectiv...

Researchers Identify Cause of Early Bird Sleep Disorder

A few rare people who consistently nod off early, then wake up wide-eyed much before dawn, can blame a newly-found mutant gene for their sleep troubles, Howard Hughes Medical Institute researchers announced today. This odd "time-shift" trait -- called familial advanced sleep phase syndrome (FASPS...

Wisconsin researchers identify sleep gene

Zeroing in on the core cellular mechanisms of sleep, researchers at University of Wisconsin Medical School have identified for the first time a single gene mutation that has a powerful effect on the amount of time fruit flies sleep. In its normal state, the Drosophila (fruit fly) gene, called Sh...

Holding breath for several minutes elevates marker for brain damage

...B, the researchers noted, including boxing, headings in soccer, running and long-distance swimming. One study also reported that individuals suffering sleep apnea had elevated levels of S100B in the morning, although another study indicated there had been no change in S100B overnight. ### Editor's ...

Cancer's distinctive pattern of gene expression could aid early screening and prevention

... aberrant change in DNA methylation. It's clearly not random." The environment, from chemicals leached from plastic or cigarettes, along with diet, sleep patterns even physical activity levels can result in these epigenetic changes that contribute to cancer and other diseases. "The natural aging proces...

Gene predicts how brain responds to fatigue, human study shows

...of The Journal of Neuroscience helps explain why sleep deprivation affects some people more than others. ...all night, those who are genetically vulnerable to sleep loss showed reduced brain activity, while those wh... "The extent to which individuals are affected by sleep deprivation varies, with some crashing out and oth...

Lack of happiness hormone serotonin in the brain causes impaired maternal behavior in mice

... produced almost no serotonin in the brain. Nevertheless, the animals were viable and half of them survived until adulthood. However, they needed more sleep during the day and the regulation of their respiration, body temperature, and blood pressure was altered. The female mice were able to give birth ...

Genetic study confirms the immune system's role in narcolepsy

...disorder that causes disabling daytime sleepiness, sleep attacks, irresistible bouts of sleep that can strike at any time, and disturbed sleep at night. The gene has a known role in the immune ...

Dolphins maintain round-the-clock visual vigilance

... Dolphins have a clever trick for overcoming sleep deprivation. Sam Ridgway from the US Navy Marine M...that they are able to send half of their brains to sleep while the other half remains conscious. What is mo... checked the dolphins' blood for physical signs of sleep deprivation, they couldn't find any. After 5 days ...

Translating the conversation between the brain and blood vessels

...). Her Medical College of Georgia laboratory studies the links between conditions such as obesity and the chronic intermittent hypoxia that happens in sleep apnea and chronic activation of the sympathetic nervous system. "We're studying why people who are obese become hypertensive," Dr. Schreihofer said...

Differences among exercisers and nonexercisers during pregnancy

...ting/studying. There was a trend for the exercisers to have slightly more sleep and reading time. There was a trend for non-exercisers to have slightly m...manage their time more effectively than non-exercisers. Because exercisers sleep and read slightly more than non-exercisers and spend slightly less time on ...

Differences among exercisers and nonexercisers during pregnancy

...ting/studying. There was a trend for the exercisers to have slightly more sleep and reading time. There was a trend for non-exercisers to have slightly m...manage their time more effectively than non-exercisers. Because exercisers sleep and read slightly more than non-exercisers and spend slightly less time on ...

International prize for Nottingham spine research

... half their body weight to simulate the effect of being upright and walking around during daytime hours and lying down unloaded to simulate night time sleep conditions. The results of the study could help to inform the way in which degeneration of the intervertebral discs is medically managed in the fut...

Research supports toxoplasmosis link to schizophrenia

...and produces an enzyme called tyrosine hydroxylase, which is needed to make dopamine. Dopamine's role in mood, sociability, attention, motivation and sleep patterns are well documented and schizophrenia has long been associated with dopamine, which is the target of all schizophrenia drugs on the market. ...

Metastatic bone disease patients can walk in Lazarus' footsteps

...hey have metastatic bone disease. Normal daily activities can become difficult when the metastases become painful, and many patients report that their sleep patterns change, appetite diminishes and the need to take pain relief medications increases," he noted. "Osteoplasty is not a first-line treatment. It...

GUMC young scientist selected postdoc Fellow at National Space Biomedical Research Institute

...tion exposure, neurobehavioral and psychosocial factors, remote medical care and related technologies, and habitability and performance issues such as sleep cycles and lunar dust exposure. Research findings also impact the understanding and treatment of similar medical conditions experienced on Earth. ...
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