Circadian Rhythm News and Research RSS Feed - Circadian Rhythm News and Research

Circadian Rhythm is the regular recurrence, in cycles of about 24 hours, of biological processes or activities, such as sensitivity to drugs and stimuli, hormone secretion, sleeping, feeding, etc. This rhythm seems to be set by a 'biological clock' which seems to be set by recurring daylight and darkness.
TSRI scientists unravel mystery of ‘food coma’ phenomenon

TSRI scientists unravel mystery of ‘food coma’ phenomenon

Anyone who has drifted into a fuzzy-headed stupor after a large holiday meal is familiar with the condition commonly known as a "food coma." [More]
Researchers identify mechanism of how circadian clocks in neurons encode daily rhythms of excitability

Researchers identify mechanism of how circadian clocks in neurons encode daily rhythms of excitability

Molecular clocks in cells throughout the body control many physiologic changes in a 24-hour day/night circadian rhythm -- among them the timing of sleep and wakefulness. [More]
Particular eating behaviors linked to lower odds of developing liver diseases

Particular eating behaviors linked to lower odds of developing liver diseases

Particular eating behaviors may lower the risk of developing non-alcoholic fatty liver disease (NAFLD), according to research presented this week at The Liver Meeting — held by the American Association for the Study of Liver Diseases. [More]
New study examines genetic factors underlying poor tolerance to shift work

New study examines genetic factors underlying poor tolerance to shift work

Some people adapt easily to shift work, but not everyone can handle constant disruptions to their daily rhythm. Finnish researchers have now found that a melatonin receptor gene influences tolerance to shift work. [More]
New technology may help scientists better understand circadian rhythm in individual cells

New technology may help scientists better understand circadian rhythm in individual cells

An interdisciplinary team of researchers at the University of Georgia has developed a new technology that may help scientists better understand how an individual cell synchronizes its biological clock with other cells. [More]
Disrupted circadian rhythm may not help achieve maximum weight loss after bariatric surgery

Disrupted circadian rhythm may not help achieve maximum weight loss after bariatric surgery

A newly released basic science study of Roux-en-Y gastric bypass (RYGB) suggests that a functioning circadian clock, or sleeping at night and being awake during the day, can help patients achieve a higher amount of weight loss following the surgery. [More]
Study provides insight into how the brain's biological clock regulates physiological function

Study provides insight into how the brain's biological clock regulates physiological function

The brain's biological clock stimulates thirst in the hours before sleep, according to a study published in the journal Nature by McGill University researchers. [More]
Studies find night shift work has little or no effect on woman's breast cancer risk

Studies find night shift work has little or no effect on woman's breast cancer risk

Despite an assessment in 2007 indicating that night shift work was probably carcinogenic, data from three new studies and from a review of currently available evidence, published in the Journal of the National Cancer Institute, indicate that night shift work has little or no effect on breast cancer incidence. [More]
Review examines link between insomnia and alcohol dependence

Review examines link between insomnia and alcohol dependence

Individuals with alcohol dependence (AD) often have sleep-related disorders such as insomnia, circadian-rhythm sleep disorders, breathing-related sleep disorders, movement disorders, and parasomnias such as sleep-related eating disorder, sleepwalking, nightmares, sleep paralysis, and REM sleep behavior disorder. [More]
High cortisol levels during morning sessions provide more benefits to psychotherapy patients

High cortisol levels during morning sessions provide more benefits to psychotherapy patients

Patients make more progress toward overcoming anxiety, fears and phobias when their therapy sessions are scheduled in the morning, new research suggests. [More]
Research highlights interaction between biological clock and sleep loss at regional brain level

Research highlights interaction between biological clock and sleep loss at regional brain level

Ever wondered what happens inside your brain when you stay awake for a day, a night and another day, before you finally go to sleep? In a new study published today in the journal Science, a team of researchers from the University of Liege and the University of Surrey have scanned the brains of 33 participants across such a 2-day sleep deprivation period and following recovery sleep. [More]
CARRS-Q study shows caffeine combined with bright light can improve driver alertness

CARRS-Q study shows caffeine combined with bright light can improve driver alertness

Bright light combined with caffeine can improve driving performance and alertness of chronically sleep deprived young drivers, according to a Queensland University of Technology road safety study. [More]
Honeybee study finds link between social behavior and circadian rhythms

Honeybee study finds link between social behavior and circadian rhythms

Circadian rhythms are internal clocks that determine many of an organism's daily rhythms, for example sleep-wake, feeding, urinary output and hormone production. [More]
Study shows subcutaneous fat tissue has internal clock that regulates insulin sensitivity

Study shows subcutaneous fat tissue has internal clock that regulates insulin sensitivity

Fat tissue shows a robust circadian rhythm in a dish.In humans, glucose tolerance varies with time of day, but the mechanism responsible for the variation in insulin sensitivity throughout the day is unclear. [More]
Disruptive sleep patterns could raise heart disease risk in shift workers and insomniacs

Disruptive sleep patterns could raise heart disease risk in shift workers and insomniacs

People who suffer from a lack of sleep and disordered sleep cycles could be increasing their chances of developing cardiovascular disease, according to a study in the American Heart Association’s Journal Hypertension. [More]
Shift work alters internal body clock and leads to strokes, serious brain implications

Shift work alters internal body clock and leads to strokes, serious brain implications

Statistics show that some 15 million Americans don't work the typical nine-to-five. These employees (or shift workers), who punch in for graveyard or rotating shifts, are more prone to numerous health hazards, from heart attacks to obesity, and now, new research, published in Endocrinology, shows shift work may also have serious implications for the brain. [More]
Altered circadian somatostatin expression linked to bipolar disorder

Altered circadian somatostatin expression linked to bipolar disorder

Results of the first study of its kind to link abnormalities in circadian rhythms to changes in specific neurotransmitters in people with bipolar disorder will be published this week in the journal Biological Psychiatry. [More]
Salk scientists discover REV-ERBα protein that controls strength of circadian rhythm

Salk scientists discover REV-ERBα protein that controls strength of circadian rhythm

At noon every day, levels of genes and proteins throughout your body are drastically different than they are at midnight. Disruptions to this 24-hour cycle of physiological activity are why jet lag or a bad night's sleep can alter your appetite and sleep patterns for days--and even contribute to conditions like heart disease, sleep disorders and cancers. [More]
Neuropeptide plays role in driving rhythms of detoxification gene activity, study shows

Neuropeptide plays role in driving rhythms of detoxification gene activity, study shows

A 24-hour rhythm of cellular detoxification in flies and mammals is coordinated by a neuropeptide that also drives feeding in both organisms, found a team led by Amita Sehgal, PhD, a professor of Neuroscience and director of the Chronobiology Program, in the Perelman School of Medicine at the University of Pennsylvania. [More]
Sleep hormone melatonin may be responsible for type 2 diabetes risk among overnight workers

Sleep hormone melatonin may be responsible for type 2 diabetes risk among overnight workers

A new experimental and clinical study from Lund University in Sweden shows that the sleep hormone melatonin impairs insulin secretion in people with a common gene variant. [More]
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