Navigation Links
Does the moon affect our sleep?
Date:6/17/2014

Popular beliefs about the influence of the moon on humans widely exist. Many people report sleeplessness around the time of full moon. In contrast to earlier studies, scientists from the Max Planck Institute of Psychiatry in Munich did not observe any correlation between human sleep and the lunar phases. The researchers analyzed preexisting data of a large cohort of volunteers and their sleep nights. Further identification of mostly unpublished null findings suggests that the conflicting results of previous studies might be due to a publication bias.

For centuries, people have believed that the moon cycle influences human health, behavior and physiology. Folklore mainly links the full moon with sleeplessness. But what about the scientific background?

Several studies searched in re-analyses of pre-existing datasets on human sleep for a lunar effect, although the results were quite varying and the effects on sleep have rarely been assessed with objective measures, such as a sleep EEG. In some studies women appeared more affected by the moon phase, in others men. Two analyses of datasets from 2013 and 2014, each including between 30 and 50 volunteers, agreed on shorter total sleep duration in the nights around full moon. However, both studies came to conflicting results in other variables. For example, in one analysis the beginning of the REM-sleep phase in which we mainly dream was delayed around new moon, whereas the other study observed the longest delay around full moon.

To overcome the problem of possible chance findings in small study samples, scientists now analyzed the sleep data of overall 1,265 volunteers during 2,097 nights. "Investigating this large cohort of test persons and sleep nights, we were unable to replicate previous findings," states Martin Dresler, neuroscientist at the Max Planck Institute of Psychiatry in Munich, Germany, and the Donders Institute for Brain, Cognition and Behaviour in Nijmegen, Netherlands. "We could not observe a statistical relevant correlation between human sleep and the lunar phases." Further, his team identified several unpublished null findings including cumulative analyses of more than 20,000 sleep nights, which suggest that the conflicting results might be an example of a publication bias (i.e. the file drawer problem).

The file drawer problem describes the phenomenon, that many studies may be conducted but never reported they remain in the file drawer. One much-discussed publication bias in science, medicine and pharmacy is the tendency to report experimental results that are positive or show a significant finding and to omit results that are negative or inconclusive.

Up to now, the influence of the lunar cycle on human sleep was investigated in re-analyses of earlier studies which originally followed different purposes. "To overcome the obvious limitations of retrospective data analysis, carefully controlled studies specifically designed for the test of lunar cycle effects on sleep in large samples are required for a definite answer," comments Dresler.


'/>"/>
Contact: Anna Niedl
anna_niedl@mpipsykl.mpg.de
49-089-306-22263
Max-Planck-Gesellschaft
Source:Eurekalert  

Related medicine news :

1. KRAS gene mutation and amplification status affects sensitivity to antifolate therapy
2. Social Factors May Affect Lifespan More Than Race, Location
3. Moffitt researchers find cancer therapies affect cognitive functioning among breast cancer survivors
4. Health Care Disparities Might Affect Black Kids Cancer Survival
5. Joslin scientists identify important mechanism that affects the aging process
6. Gut flora affects maturation of B cells in infants
7. Asthma Cases Continue to Rise in U.S., Affecting Millions
8. Viewers family background affects how they react to MTV shows 16 and Pregnant, Teen Mom
9. Odds of quitting smoking affected by genetics
10. How does exercise affect nerve pain?
11. Surgeon experience affects complication rate of spinal stenosis surgery
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Does the moon affect our sleep?
(Date:2/12/2016)... ... , ... US Sport Camps is pleased to announce the addition of junior ... as the host site and directing the camps is PGA Professional and 2008 Iowa ... in recent years around Des Moines and are fortunate to have such a well-respected ...
(Date:2/12/2016)... (PRWEB) , ... February 12, 2016 , ... A lot ... past 35 years. A president has access to health and wellness resources most Americans ... free world, no single individual has a schedule as frenetic as the U.S. President. ...
(Date:2/12/2016)... ... February 12, 2016 , ... Healthcare careers in the medical laboratory, nursing, ... via the website of healthcare staffing leader Aureus Medical Group during the month of ... travel therapy positions and in travel and direct hire opportunities in other ...
(Date:2/12/2016)... ... , ... The Central Coast Autism Spectrum Center (CCASC) invites teens ages 11-18 to its annual ... for teens with and without special needs to gather in a safe and supportive environment. ... dance will take place on Saturday, Feb. 13 from 7 to 9:30 p.m. at Elks ...
(Date:2/12/2016)... ... February 12, 2016 , ... ... in the field of long term care. With that, says Patrick Loughney, president ... professionals in administrative roles in long term care environments. His company, which offers ...
Breaking Medicine News(10 mins):
(Date:2/12/2016)... Ungarn, February 12, 2016 ... sich auf den ungedeckten medizinischen Bedarf bei ... Ergebnisse seines klinischen Forschungsprogramms bekannt. Das Programm, ... ergab Verbesserungen ihrer respiratorischen Funktionen und anderer ... , ein Medizintechnikunternehmen, das sich auf den ...
(Date:2/12/2016)... , Maharashtra, February 12, 2016 ... Market research report titled Chronic Inflammation Global Clinical ... a snapshot of the global clinical trials landscape ... clinical trials by Region, Country (G7 & E7), ... point status and reviews top companies involved and ...
(Date:2/11/2016)... -- - Cardiac Marker Diagnostic Testing ... Cancer Therapy. - European Point of Care Diagnostic ... - Key Diagnostic Testing Markets. - Molecular Diagnostics ... Testing. - Molecular Diagnostics in Infectious Disease Testing. ... Products World Markets. - Point of Care Diagnostic ...
Breaking Medicine Technology: