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

Can meal times affect your risk of glucose intolerance?

In this interview, we speak to Dr. Frank Scheer and Dr. Sarah Chellappa about their latest research that investigated the effect meal times has on glucose intolerance.

18 Jan 2022

Researchers investigate the role of a key component of the circadian clock in heart disease

Disrupting circadian rhythms, which change naturally on a 24-hour cycle, has been implicated in heart disease, but it is unclear how it leads to the condition.

17 Jan 2022

Research provides a comprehensive map of exercise-induced signaling molecules present in the tissues

It is well established that exercise improves health, and recent research has shown that exercise benefits the body in different ways, depending on the time of day. But scientists still do not know why the timing of exercise produces these different effects.

17 Jan 2022

Daytime meals can help regulate bloodstream glucose levels in night shift workers

What are the effects of eating during the nighttime instead of the daytime? New research, focused on a simulation of night shift work, may hold implications for people eating at atypical times -; like those experiencing jet lag, circadian rhythm sleep disorders, or who tend to sleep late during the weekends.

6 Dec 2021

Study sheds new light on how certain neurons regulate the number of heart muscle cells

Human heart muscle cells cease to multiply after birth, making any heart injury later in life a permanent one, reducing function and leading to heart failure.

2 Dec 2021

Study reports first-ever modeling of the electrical activity of circadian clock neurons in diurnal species

It's no secret that jet lag and night-shift work can wreak havoc on the way our body's internal clock syncs up our daily wake-sleep cycle, known as circadian rhythm, but now researchers say they are a step closer to understanding how the brain creates behavioral rhythms optimized for diurnal, rather than nocturnal, life.

30 Nov 2021

Early or late bedtimes may cause adverse consequences for cardiovascular health

Going to sleep between 10:00 and 11:00 pm is associated with a lower risk of developing heart disease compared to earlier or later bedtimes, according to a study published today in European Heart Journal – Digital Health, a journal of the European Society of Cardiology.

9 Nov 2021

How cellular clocks regulate cardiac physiology

In this interview, News-Medical speaks to research associate Dr. Alessandra Stangherlin about her latest research that provided new insights into the circadian rhythm of the heart.

2 Nov 2021

Skeletal muscle in individuals with type 2 diabetes has a different circadian rhythm, research shows

Almost all cells regulate their biological processes over a 24-hour period, otherwise called a cell's circadian rhythm. To do so, cells use a biological clock that cycles different genes on and off throughout the day and night. Scientists already know that our metabolic health can suffer when our biological clock breaks down, due to shift work or sleep disorders, for example. However, it's unclear how exactly the biological clock of people with type 2 diabetes differs from healthy people.

21 Oct 2021

Immune system activation is modulated according to the time of day

Circadian clocks, which regulate most of the physiological processes of living beings over a rhythm of about 24 hours, are one of the most fundamental biological mechanisms.

18 Oct 2021

Managing metabolic disease through time-restricted eating

In this interview, News-Medical speaks to Dr. Satchin Panda about his latest research into time-restricted eating and how it can be used to manage metabolic diseases.

5 Oct 2021

Skeletal muscle activity regulates circadian rhythm of the liver

The biological clock/circadian rhythm is the mechanism that ensures that a certain physiological process takes place at a specific time of the day or night.

23 Sep 2021

Long-term circadian rhythm disruption induces Alzheimer's-like pathology in rats

Disrupted circadian rhythms, which can even be caused by chronic light exposure, affects normal physiological functions, resulting in anxiety, hyperactivity, and memory deficits.

19 Aug 2021

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