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

Chronobiology: Why Time Matters in Medicine

Latest Circadian Rhythm News and Research

Study reveals how sleep misalignment affects mood and mental health

Sleep schedules are often one of the first things that people choose to compromise in order to check everything off their to-do lists, especially with the end of the year approaching. But folks hoping for happy holidays should reconsider.

18 Dec 2024

Brain tumors exploit body's daily rhythms to fuel growth

Scientists explore how daily glucocorticoid signaling influences glioblastoma growth and synchronizes its circadian rhythms with the host.

18 Dec 2024

Circadian chaos: How transportation noise harms heart health

Transportation noise poses serious risks to cardiovascular health, causing inflammation, oxidative stress, and circadian rhythm disruption, with compounded effects from air pollution.

12 Dec 2024

Disrupted sleep-wake rhythms linked to liver disease progression

The prevalence of MASLD (metabolic dysfunction-associated steatotic liver disease) is exploding in most regions of the world, boosted by increased obesity and sedentary lifestyles. MASLD (formerly known as non-alcoholic fatty liver disease) is already the most common liver disorder: it affects 30% of adults and between 7% and 14% of children and adolescents, and this prevalence is predicted to rise to more than 55% of adults by 2040.

4 Dec 2024

Disrupted sleep patterns identified in patients with metabolic dysfunction-associated steatotic liver disease

The prevalence of MASLD (metabolic dysfunction-associated steatotic liver disease) is exploding in most regions of the world, boosted by increased obesity and sedentary lifestyles.

2 Dec 2024

Artificial nighttime light increases insomnia risk, especially in smaller cities

Social media and satellite data reveal a strong link between outdoor artificial light at night and rising insomnia rates in China's cities.

24 Nov 2024

Predicting mood episodes with sleep data: A breakthrough for mental health care

Researchers developed a machine-learning model that uses only sleep-wake patterns to predict mood episodes in patients with mood disorders, achieving high accuracy. This approach simplifies real-world mental health monitoring using data from wearables or smartphones.

21 Nov 2024

Timing of meals impacts glucose tolerance and health

Although people have always said that having a light and early dinner is better, a study by the Universitat Oberta de Catalunya (UOC) and Columbia University has provided the scientific grounds for this argument.

20 Nov 2024

Study reveals liver-brain communication as key to managing circadian eating patterns and obesity

This study uncovers the hepatic vagal nerve's influence on circadian food intake, presenting new avenues for obesity treatment through targeted interventions.

11 Nov 2024

How gut bacteria regulate stress and sleep cycles

This study reveals that gut microbiota, particularly Lactobacillus species, regulate the daily rhythm of stress hormones like corticosterone, influencing stress responses and brain function at different times of the day. Disruptions in gut bacteria lead to altered stress responses and increased susceptibility to disorders like depression.

10 Nov 2024

Liver-brain connection revealed as key to eating habits and metabolism

People who work the nightshift or odd hours and eat at irregular times are more prone to weight gain and diabetes, likely due to eating patterns not timed with natural daylight and when people typically eat.

7 Nov 2024

Exploring the circadian influence of immune cells on metabolic health and fat storage

Recent research reveals that the immune system interacts with the body's internal clock, influencing both fat storage and temperature regulation. These insights carry substantial implications for individuals with irregular work, eating, or sleep patterns driven by the demands of modern life.

6 Nov 2024

Study uncovers key role of gut microbiota in regulating stress responses

A pioneering study has uncovered the vital role that gut microbiota plays in regulating stress responses by interacting with the body's circadian rhythms.

5 Nov 2024

Bright night light exposure increases mortality risk, while daylight reduces it

Study reveals that brighter night light exposure and circadian rhythm disruption significantly increase the risk of mortality, particularly from cardiometabolic diseases, while brighter daytime light lowers these risks.

16 Oct 2024

Researchers uncover secret to regulating the body's internal clock

Scientists from Duke-NUS Medical School and the University of California, Santa Cruz, have discovered the secret to regulating our internal clock.

7 Oct 2024

Circadian rhythm influences dementia diagnosis and disease progression

The time of day when blood is taken can affect the results of tests for diagnosing dementia, according to new research led by the University of Surrey.

3 Oct 2024

Light pollution may elevate Alzheimer's risk

Outdoor light at night could be a significant risk factor in Alzheimer's disease, according to new research from Rush.

11 Sep 2024

Reduced heart rate variability linked to higher mortality in people with diabetes

Disruption to normal variations in daily heart rate (HR) is associated with a much higher risk of dying in people with type 1 and type 2 diabetes over 21 years, according to new research to be presented at this year's Annual Meeting of The European Association for the Study of Diabetes (EASD), Madrid (9-13 Sept).

9 Sep 2024

Night owls have higher BMI, larger waists and face higher risk of type 2 diabetes

Night owls have a higher BMI, larger waists, more hidden body fat and are almost 50% more likely to develop type 2 diabetes (T2D) than those who go to bed earlier, new research to be presented at the Annual Meeting of the European Association for the Study of Diabetes (EASD) in Madrid, Spain (9-13 September), has found.

9 Sep 2024

Regular mobile phone use linked to increased cardiovascular disease risk in smokers and diabetics

A new study has found that regular mobile phone use was positively associated with incident cardiovascular diseases risk, especially in current smokers and individuals with diabetes. In addition, this association was partly attributed to poor sleep, psychological distress, and neuroticism.

4 Sep 2024