Circadian Rhythm

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).

Circadian Rhythm

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

Latest Circadian Rhythm News and Research

Targeting one's internal clock could prevent or slow breast cancer progression

City of Hope scientists have identified an unlikely way to potentially prevent or slow the progression of aggressive breast cancer: target one's internal clock.

13 Feb 2020

Novel melatonin receptor molecules potentially address circadian rhythm disturbances

Like breathing or blinking, behaviors regulated by our circadian rhythms, such as digestion and sleep-wake cycles, go unnoticed by most people.

10 Feb 2020

Shift workers at increased risk for sleep disorders and metabolic syndrome

Shift workers are at a significantly increased risk for sleep disorders and metabolic syndrome, which increases a person's risk for heart disease, stroke and type 2 diabetes mellitus.

3 Feb 2020

Researchers receive $1 million grant to study effects of bacteria on the brain

With a $1 million grant from the W. M. Keck Foundation, neuroscience researchers at Washington State University and the University of Massachusetts Amherst will explore whether variations in brain levels of bacterial fragments can account for life's sleep/wake and 24-hour cycles, known as circadian rhythms.

3 Feb 2020

Fat cells can sense light, not getting enough raises risk of metabolic diseases

All life forms need sunlight to survive and not getting enough may impact health and well-being. There is a growing body of evidence that getting enough sunlight can promote optimum health. A new study supports this claim as scientists found that fat cells deep in the skin can detect sunlight and not getting enough can increase the risk of metabolic disruption.

21 Jan 2020

Circadian clock genes are involved in healing from surgery, study shows

If you have just had knee, shoulder or hip surgery, you may want to take anti-inflammatories in the morning or at noon, but not at night.

21 Jan 2020

Blue light exposure therapy can aid in healing people with mTBI

Early morning blue light exposure therapy can aid the healing process of people impact by mild traumatic brain injury, according to new research from the University of Arizona.

16 Jan 2020

Parental enforcement of bedtime yields solid results for sleep-deprived teens

Teenagers in the US simply don't get enough shut eye. The consequences of this epidemic of sleep deprivation are extensive and include increasing rates of anxiety and depression among adolescents, as well as suicidal thoughts and actions.

9 Jan 2020

Study reveals how circadian rhythm changes the way mammals can see

How mammals perceive light changes between night and day. Researchers at Aalto University and the University of Helsinki discovered that mice were better at finding a dim light in pitch-darkness in experiments done at night time compared to ones done during the day time.

19 Dec 2019

Blue light may not be so bad for sleep

The sun provides warmth and a bright light with orange-yellow hues during the day. But at night, cold, dim, and white light from the Moon, which exposes people to light similar to blue wavelengths emitted by various types of artificial lighting. Previously, blue light has been dubbed as disruptive to a good night’s sleep.

18 Dec 2019

Sleep fragmentation linked to migraine risk a day later

Nearly half of all patients who suffer migraines report sleep disturbance as a trigger for their headaches. But the relationship between sleep and migraine headaches is not well understood or well-studied.

16 Dec 2019

Rutgers expert shares tips on how to minimize jet lag, sleep disruptions during the holidays

With shorter daylight hours, stress and travel to different time zones, the holiday season can disrupt our circadian rhythm and create sleep difficulties – making it even harder to avoid stress, enjoy time with family, and finally return to work.

14 Dec 2019

Seven ways to get the right amount of sleep during holiday season

Aunt Jessica is visiting from the west coast. Twelve gifts need wrapping. Three party invites just arrived by text message. And now little Timmy's classmates expect fresh-baked cookies by 7 a.m.

12 Dec 2019

BGU researchers discover gene that causes nighttime atrial fibrillation

Genetic studies spanning three generations of a Persian Jewish family by researchers at Ben-Gurion University of the Negev. have identified a gene that causes nighttime atrial fibrillation (AFib).

18 Nov 2019

Stress affects circadian rhythm, increases metabolic disease risk

Stress is a normal part of life, but too much of everything isn’t healthy. Every day, people from all walks of life experience stress of various degrees. A new study found that when stress has disrupted the circadian rhythm, the body’s internal clock, it can increase the risk of developing metabolic diseases.

12 Nov 2019

Study shows how glucocorticoid hormones control sugar and fat levels over the course of 24 hours

For the first time, a study led by researchers at Helmholtz Zentrum München and the German Center for Diabetes Research shows how glucocorticoid hormones, such as cortisol, control sugar and fat levels differently during day and night, feeding and fasting, rest and activity, over the course of 24 hours.

10 Nov 2019

Health impact of Daylight Saving Time

Every year people make a change in their daily timetables to make use of what is called “Daylight Saving Time” (DST), and then transition back again to their earlier time clocks. However, new research published in JAMA Neurology shows that this yearly change about may affect health over the long term. The researchers strongly call for stopping this practice, which has no economic benefit, and may have severe and chronic negative health impacts.

5 Nov 2019