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 Further identification of mostly unpublished null findings suggests that the conflicting results of previous studies might be due to a publication bias.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 Further, his team identified several unpublished null findings including cumulative analyses of more than 20,000 sleep nights, which suggest that the conflicting results might be an example of a publication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:6/26/2016)... North Carolina (PRWEB) , ... June 26, 2016 , ... ... release of a new product that was developed to enhance the health of felines. ... for centuries. , The two main herbs in the PawPaws Cat Kidney Support ...
(Date:6/25/2016)... ... ... Austin residents seeking Mohs surgery services, can now turn to Dr. Jessica Scruggs ... for medical and surgical dermatology. , Dr. Dorsey brings specialization to include Mohs surgery, ... Micrographic Surgery completed by Dr. Dorsey was under the direction of Glenn Goldstein, MD, ...
(Date:6/25/2016)... ... June 25, 2016 , ... As a lifelong Southern Californian, Dr. Omkar ... M.D from the David Geffen School of Medicine at UCLA. He trained in Internal ... complete his fellowship in hematology/oncology at the UCLA-Olive View-Cedars Sinai program where he had ...
(Date:6/24/2016)... Angeles, CA (PRWEB) , ... June 24, 2016 , ... ... surgery procedures that most people are unfamiliar with. The article goes on to state ... procedures, but also many of these less common operations such as calf and cheek ...
(Date:6/24/2016)... ... June 24, 2016 , ... ... Scientific Sessions in Dallas that it will receive two significant new grants to ... came as PHA marked its 25th anniversary by recognizing patients, medical professionals and ...
Breaking Medicine News(10 mins):
(Date:6/23/2016)... INDIANAPOLIS , June 23, 2016 Roche ... received 510(k) clearance for its Elecsys BRAHMS PCT (procalcitonin) ... severe sepsis or septic shock. With this clearance, Roche ... provide a fully integrated solution for sepsis risk assessment ... associated with bacterial infection and PCT levels in blood ...
(Date:6/23/2016)... 23, 2016 Research and Markets has ... 52" report to their offering. ... creates a favourable commercial environment for MedImmune to enter. The ... that will serve to drive considerable growth for effective anti-influenza ... to cap sales considerably, but development is still in its ...
(Date:6/23/2016)... and INDIANAPOLIS , June 23, 2016 ... Lilly Diabetes Tomorrow,s Leaders Scholarship is any indication, the ... announced today online at www.diabetesscholars.org by the ... diabetes stand in the way of academic and community ... Foundation,s scholarship program since 2012, and continues to advocate ...
Breaking Medicine Technology: