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.
An innovative new study from the University of Surrey and Cambridge's MRC Laboratory of Molecular Biology, published in the prestigious journal Nature Communications, has uncovered the secrets of the circadian rhythms in red blood cells and identified potassium as the key to unraveling the mystery.
Insights into how the body clock and time of day influence immune responses are revealed today in a study published in leading international journal Nature Communications.
Can orange light therapy help people who have serious mental disorders? Who hear voices and see things that aren't there? Or who are thinking about committing suicide?
Scientists have long sought to unravel the molecular mysteries that make the human brain special: What processes drove its evolution through the millennia? Which genes are critical to cognitive development?
A new study conducted at the Medical Research Council (MRC) Laboratory of Molecular Biology, UK, has found how wound healing is regulated by the body clock in such a way that injuries that occured at daytime heal nearly 60% faster than that at night.
A new Finnish study shows that individual circadian preference is associated with brain activity patterns during the night.
Can environmental toxins disrupt circadian rhythms - the biological "clock" whose disturbance is linked to chronic inflammation and a host of human disorders? Research showing a link between circadian disruption and plankton that have adapted to road salt pollution puts the question squarely on the table.
Researchers at Okayama University describe in the Journal of Neuroscience that a certain protein known to play a major role in circadian rhythmicity — humans’ intrinsic 24-hour biological cycle — is also key to proper brain functioning.
It has always been apparent that some individuals have a better sense of smell than others, but a new study of 37 teens provides the first direct evidence that within each person, smell sensitivity varies over the course of each day. The pattern, according to the data, tracks with the body's internal day-night cycle, or circadian rhythm.
Biological clocks are ticking everywhere throughout our body. They trigger the release of the hormone melatonin during sleep, favour the secretion of digestive enzymes at lunchtime or keep us awake at the busiest moments of the day.
The fat content and levels of several key nutrients and hormones in breast milk vary with the mother's circadian rhythm, which may have implications for the timing of breastfeeding and feeding of expressed milk, especially for high-risk infants.
Does the time of day matter when our body is infected by a parasite? According to new research from McGill University, it matters a great deal.
Around 75% of children and adults with Attention Deficit Hyperactivity Disorder (ADHD) also have sleep problems, but until now these have been thought to be separate issues.
New research from McLean Hospital neuroscientists shows in an animal model that being bullied can have long-term, dramatic effects on sleep and other circadian rhythm-related functions, symptoms that are characteristic of clinical depression and other stress-induced mental illnesses.
There's no doubt we love our digital devices at all hours, including after the sun goes down. Who hasn't snuggled up with a smart phone, tablet or watched their flat screen TV from the comfort of bed? A new study by researchers at the University of Houston College of Optometry, published in Ophthalmic & Physiological Optics, found that blue light emitted from those devices could contribute to the high prevalence of reported sleep dysfunction.
A study conducted on the Hadza people in Tanzania suggests a natural variation in sleeping patterns among people living in groups, where there is rarely a moment when someone isn’t vigilant enough to raise an alarm.
A new study has offered insights into the association between night shift work and increased cancer risk, as well as pointing towards a potential solution. For several years, scientists have thought that disruption to the body’s natural circadian rhythm is accountable for the increased cancer risk, but the mechanisms behind this have not yet been pinpointed.
A chronic lack of sleep not only impairs cognitive abilities but also increases the risk of heart disease and diabetes.
Some bodily activities, sleeping, for instance, mostly occur once every 24 hours; they follow a circadian rhythm. Other bodily functions, such as body temperature, cognitive performance and blood pressure, present an additional 12-hour cycle, but little is known about the biological basis of their rhythm.
The human body works according to a roughly 24-hr cycle. It is controlled by a master clock in the brain and by peripheral clocks in other parts of the body, which are synchronized according to external cues such as light.