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.
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.
Brian Samuels, M.D., Ph.D., assistant professor in the University of Alabama at Birmingham Department of Ophthalmology, has received a five-year, $1.5 million grant from the National Eye Institute to explore the links between circadian fluctuations and glaucoma. This is Samuels' first R01 grant.
Researchers at Baylor College of Medicine have discovered that changing the circadian clock in mouse liver can alter how the body responds to diet and also change the microbes living in the digestive track.
Cells in the brain's master circadian clock synchronize voltage rhythms despite asynchronous calcium rhythms, which might explain how a tissue-wide rhythm is maintained.
Circadian rhythms may play a crucial role in the recovery of consciousness of patients with severe brain injuries, a study published in Neurology.
For people with severe brain injuries, researchers have found that the rhythm of daily fluctuations in body temperature is related to their level of consciousness, according to a preliminary study published in the April 19, 2017, online issue of Neurology, the medical journal of the American Academy of Neurology.
If all your life, you have been functioning best in the evening and night compared to the mornings, a gene mutation may be a reason.
New research shows that the light environment in intensive care affects how patients feel - even a year after completed hospitalization. With light adapted to the time of day, health even improves for patients who are barely conscious when they are admitted for care.
Until recently, work on biological clocks that dictate daily fluctuations in most body functions, including core body temperature and alertness, focused on neurons, those electrically excitable cells that are the divas of the central nervous system.
According to a nutrition study led by the German Institute of Human Nutrition, a partner of the German Center for Diabetes Research, the so-called internal clock also influences how people with impaired glucose metabolism react to carbohydrate-rich food.
A new study suggests that the melatonin content of dietary supplements often varies widely from what is listed on the label.