Circadian Rhythm News and Research

Latest Circadian Rhythm News and Research

Night owls do it tougher than other insomniacs

According to a new study night owls, those who stay up late with insomnia and then sleep longer in the mornings, have more psychological symptoms than morning insomniacs and need different treatment, even though they get more sleep.

16 Apr 2007

A mild head injury can increase your chance of developing a sleep disorder

Researchers say these findings highlight the need for improved diagnosis and treatment of sleep disorders in mild traumatic brain injury patients who complain of insomnia.

4 Apr 2007

New insights into melatonin production

In the April 1 issue of G&D, a Korean research team led by Dr. Kyong-Tai Kim (Pohang University) describes how melatonin production is coordinated with the body's natural sleep/wake cycles.

2 Apr 2007

Actigraphy helps assess and manage sleep disorders

Actigraphy, the use of a portable device that records movement over extended periods of time, and has been used extensively in the study of sleep and circadian rhythms, provides an acceptably accurate estimate of sleep patterns in normal, healthy adult populations and in-patients suspected of certain sleep disorders, according to practice parameters published in the April 1st issue of the journal SLEEP.

2 Apr 2007

Circadian genes may be involved in bipolar disorder

Disrupt the gene that regulates the biological clocks in mice and they become manic, exhibiting behaviors similar to humans with bipolar disorder, UT Southwestern Medical Center researchers have found.

25 Mar 2007

Research suggests a significant circadian rhythm in swim performance lasting 2-4 minutes

A new study investigating the potential of a circadian rhythm in athletic performance adds further confirmation that it exists. The finding is being published in the Journal of Applied Physiology, one of 11 peer reviewed scientific publications issued monthly by the American Physiological Society (APS).

27 Feb 2007

Jet lag could be a killer

Researchers in the U.S. have found that jet lag or rotating shift work shortens the lifespan in mice and they say it raises concerns for humans affected by time disruption.

7 Nov 2006

Period 2 gene - key component of the circadian time-keeping system

By investigating how animals can predict the timing of food availability, researchers have identified the first gene critical for anticipation of mealtime. This gene, called Period 2, is a key component of the circadian time-keeping system.

23 Oct 2006

Internal body clock dictates timing of different types of stroke

The internal body clock, or circadian rhythm, seems to influence the timing of different types of stroke, suggests research published ahead of print in the Journal of Neurology Neurosurgery and Psychiatry.

17 Aug 2006

The circadian rhythm of glucocorticoids is regulated by a gating mechanism residing in the adrenal cortical clock

In mammals, including humans, a master clock in the brain and subordinate clocks found in organs throughout the body coordinate daily, or circadian, rhythms of behavior and physiology.

8 Aug 2006

Actual meal time activates genes in specific brain area

Giving up your regular late-night snack may be hard, and not just because it's a routine.

6 Aug 2006

Study finds sleep vital for memory

Sleep benefits an individual's ability to recall recently learned declarative memories, even when recall of these memories is challenged hours later by competing information.

11 Jul 2006

Sleep gene discovery

Proteins that regulate sleep and biological timing in the body work much differently than previously thought, meaning drug makers must change their approach to making drugs for sleep disorders and depression and other timing-related illnesses.

4 Jul 2006

New genetic findings relating to the tau mutation

The first gene known to control the internal clock of humans and other mammals works much differently than previously believed, according to a study by Utah and Michigan researchers.

3 Jul 2006

Scientists find sleep hormone melatonin in red wine grapes

Scientists in Italy say they have discovered that the grapes used to make some of the most popular red wines contain high levels of the sleep hormone melatonin.

18 Jun 2006

Melatonin, taken orally can improve ability to sleep

Researchers from the Divisions of Sleep Medicine at Brigham and Women's Hospital and Harvard Medical School have found in a double-blind placebo-controlled clinical study, that melatonin, taken orally during non-typical sleep times, significantly improves an individual's ability to sleep.

3 May 2006

Prenatal exposure to alcohol can change child's circadian rhythms

Altered sleeping and eating patterns, behavioral problems, attention deficits and depression in children with fetal alcohol spectrum disorders may indicate that their biological rhythms, which are controlled by circadian systems, have been affected by alcohol exposure during development.

25 Apr 2006