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

Irregular sleep and poor REM sleep linked to higher risk of chronic diseases

Longitudinal data from wearable devices linked to health records show that irregular sleep patterns and inadequate REM sleep increase the risk of chronic diseases like hypertension and depression. This emphasizes the importance of consistent and high-quality sleep for overall health.

22 Jul 2024

Exploring the impact of eating timing on health and metabolism

Accumulating evidence on the effect of the time of eating in relation to our circadian rhythm and metabolism shows that when we eat may influence our overall health and well-being.

18 Jul 2024

Study links circadian rhythm disruption to obesity and diabetes

Disruption of circadian rhythms and clock gene expression is linked to adverse metabolic health outcomes, including obesity and diabetes. Further research is needed to understand these relationships and their implications for treatment and prevention.

17 Jul 2024

Study links OCD improvement to brain activity shift

A recent study from Baylor College of Medicine and Texas Children's Hospital has identified a specific neural activity pattern as a novel biomarker to accurately predict and monitor the clinical status of individuals with obsessive-compulsive disorder (OCD) who have undergone deep brain stimulation (DBS), a rapidly emerging therapeutic approach for severe psychiatric disorders. The study, led by led by Drs. Sameer Sheth and Wayne Goodman along with co-lead authors, Drs. Nicole Provenza, Sandy Reddy, and Anthony Allam, was published in Nature Medicine.

13 Jul 2024

Novel DNA aptamers of melanopsin developed to regulate circadian rhythm

DNA aptamers of melanopsin that regulate the clock hands of biological rhythms were developed by the Toyohashi University of Technology and the National Institute of Advanced Industrial Science and Technology (AIST) group.

12 Jul 2024

Disturbances in sleep patterns increase the risk of depression in midlife women

The relationship between sleep-wake changes and depressive symptoms among midlife women.

4 Jul 2024

Research reveals light's impact on metabolism beyond circadian rhythms

A recent Nature Metabolism review highlights how light exposure or deprivation affects metabolic activities like thermogenesis and glucose homeostasis through non-circadian pathways.

4 Jun 2024

Social jet lag in mice linked to weight gain and higher blood sugar

Mice experiencing “social jet lag” developed characteristics similar to people with the same phenomenon, including significant weight gain, higher blood sugar levels and lower cardiovascular fitness.

17 May 2024

Central and peripheral clock synchronization vital for optimal tissue function

Discovered in the 1970s, circadian clocks are essential for the regulation of biological time in most cells in the human body.

2 May 2024

New system personalizes chemotherapy doses for cancer patients

When cancer patients undergo chemotherapy, the dose of most drugs is calculated based on the patient's body surface area. This is estimated by plugging the patient's height and weight into an equation, dating to 1916, that was formulated from data on just nine patients.

24 Apr 2024

The relationship between calcium consumption at various times of the day and cardiovascular disease

The quantity of calcium consumed at breakfast and dinner was associated with cardiovascular disease (CVD).

23 Apr 2024

New review explores the key gender differences in sleep, circadian rhythms and metabolism

A new review of research evidence has explored the key differences in how women and men sleep, variations in their body clocks, and how this affects their metabolism.

12 Apr 2024

Infant gut microbiomes exhibit circadian rhythms independent of external cues

Infant gut microbiomes oscillate with a circadian rhythm, even when they are cultivated outside of the body.

2 Apr 2024

Medical malpractice incident severity found to be higher during daylight saving time

Medical malpractice incidents are more severe during the months of the year when daylight saving time is observed in the U.S., according to a new study that examined three decades of malpractice claims.

7 Mar 2024

International commission examines conflicting evidence on health effects of blue light exposure

For years, scientists have expressed concern about potential adverse health effects of excessive exposure to short wavelength light (SWL), which includes the "blue light" from smartphones, laptops, and tablets.

5 Mar 2024

Sleep-circadian disturbances can trigger or worsen a range of psychiatric disorders

Problems with our sleep and internal body clock can trigger or worsen a range of psychiatric disorders, according to a new review of recent research evidence.

19 Feb 2024

Elevated cortisol in pregnant women with depression linked to preterm birth, low birth weight

Women with depressive symptoms during pregnancy may experience an alteration in the circadian rhythm of cortisol — a hormone that is necessary for fetal development — which could affect the course of pregnancy.

1 Feb 2024

Study explores the mediatory role of gut microbiota in metabolic syndrome and sleep disorders

Researchers described gut microbiota and metabolic alterations common to metabolic syndrome (MetS) and sleep disorders.

31 Jan 2024

Sweat tattoos: UMass Amherst develops skin-friendly monitors for health insights

University of Massachusetts Amherst researchers have received an award to develop a new type of sweat monitor that can be applied to the skin just like a temporary tattoo and assess the molecules present, such as cortisol.

25 Jan 2024

Irregular sleep rhythm linked to poorer cardiovascular health in middle-aged people

According to recent research, an irregular sleep rhythm is associated with poorer cardiovascular health in middle-aged people. Inconsistent bedtimes appear to particularly increase waist circumference.

24 Jan 2024