Circadian Rhythm

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.

How Does the Suprachiasmatic Nucleus (SCN) Control Circadian Rhythm?

Circadian rhythms are biological cycles within organisms that allow them to adjust their physiology and behavior to anticipate and adapt to changes in the outside environment. Circadian rhythms are maintained with the help of circadian clocks, the main circadian clock in mammals is the suprachiasmatic nucleus (SCN).

What is the Circadian Rhythm?

Circadian Rhythm and Weight Loss

Artificial Light Exposure and Circadian Rhythm

Circadian Rhythm Length Variations - Early Birds and Night Owls

Circadian Rhythm Sleep Disorders

Social Jetlag and Sleep

How Does Airplane Travel Affect the Human Body?

The Circadian Rhythm and the Immune System

Memory Recall and Circadian Rhythm

Latest Circadian Rhythm News and Research

Protein consumption at breakfast can increase muscle size and function, finds study

Proteins constitute an essential dietary component that help in the growth and repair of the body. Composed of long chains of amino acids, proteins promote the growth of skeletal muscles, the group of muscles that help us move.

20 Jul 2021

Is there a link between circadian rhythms and COVID-19 severity?

This study showed that the time of day of SARS-CoV-2 infection could impact the severity of the viral infection and the host immune response.

1 Jul 2021

New AASM position statement emphasizes that sleep is a biological necessity

A new position statement from the American Academy of Sleep Medicine emphasizes that sleep is a biological necessity, and insufficient sleep and untreated sleep disorders are detrimental for health, well-being, and public safety.

21 Jun 2021

Change in diet and circadian clock can impact healthy fat tissue, finds study

Changing your eating habits or altering your circadian clock can impact healthy fat tissue throughout your lifespan, according to a preclinical study published today in Nature by researchers with The University of Texas Health Science Center at Houston.

15 Jun 2021

Naked mole rats may hold the key to new treatments for cancer, dementia

Scientists say naked mole rats - a rodent native to West Africa - may hold the key to new treatments for degenerative diseases such as cancer and dementia. The reclusive animals have a lifespan far in excess of other rodents - for example, mice and rats live about two years, whereas naked mole rats can live for 40 or 50 years.

11 Jun 2021

Researchers identify novel gene that controls sleep/wake cycle in mice

That internal nagging feeling that drives you to seek sleep at night and wake in the morning to eat, work, and play, is, it turns out, genetic, and it's not just in people.

9 Jun 2021

Healthy habits of pregnancy – latest science show maternal habits affect pregnancy success

Four new studies investigating the effects of supplements, eating habits and physical activity and how they can affect various aspects of health during pregnancy are being presented at NUTRITION 2021 LIVE ONLINE.

7 Jun 2021

Waking up just one hour earlier can reduce risk of major depression, indicates study

Waking up just one hour earlier could reduce a person's risk of major depression by 23%, suggests a sweeping new genetic study published May 26 in the journal JAMA Psychiatry.

29 May 2021

Excessive night-time screen use linked to short-sightedness, poor sleep quality

People affected by short-sightedness are familiar with the frustration of only being able to clearly see objects up close, but not a far distance.

29 May 2021

Researchers investigate how the brain's circadian rhythm control center regulates behavior

Our bodies and behaviors often seem to have rhythms of their own. Why do we go to the bathroom at the same time every day? Why do we feel off if we can't go to sleep at the right time? Circadian rhythms are a behind-the-scenes force that shape many of our behaviors and our health.

28 Apr 2021

Study shows link between disturbed sleep and increased risk of cardiovascular death in women

For the first time, a study has shown a clear link between the frequency and duration of unconscious wakefulness during night-time sleep and an increased risk of dying from diseases of the heart and blood vessels, and death from any cause, particularly in women.

20 Apr 2021

Light therapy offers a safe, cost-effective alternative for treatment of neurodegenerative diseases

A lot about the human brain and its intricacies continue to remain a mystery. With the advancement of neurobiology, the pathogenesis of several neurodegenerative diseases (ND) has been uncovered to a certain extent along with molecular targets around which current therapies revolve.

19 Apr 2021

New research project to explore the impact of urban lighting on health and wellbeing

While EU cities have worked on improving urban lighting services, this has mostly focussed on efficiency, reducing costs and lowering emissions.

4 Mar 2021

Small wearable sensor can detect stress biomarker in sweat

We've all felt stressed at some point, whether in our personal or professional lives or in response to exceptional circumstances like the COVID-19 pandemic. But until now there has been no way to quantify stress levels in an objective manner.

6 Feb 2021

Scientists study how different genes dance to the circadian rhythm

In 2017, the Nobel Prize in Physiology or Medicine went to three scientists who uncovered the molecular mechanisms that control the circadian rhythm, otherwise known as the "wake-sleep" cycle.

29 Jan 2021

World's first fully reversible manipulation of the circadian clock

The Nagoya University Institute of Transformative Bio-Molecules research team of Designated Associate Professor Tsuyoshi Hirota, Postdoctoral Fellow Simon Miller, Professor Kenichiro Itami and graduate student Tsuyoshi Oshima (Research Fellowship for Young Scientists, JSPS), in collaboration with the group of Professor Ben Feringa and Postdoctoral Fellow Dušan Kolarski of Groningen University in the Netherlands, have achieved a world first: fully reversible manipulation of the period of the circadian clock using light, by exchanging part of a compound with a light-activated switch.

25 Jan 2021