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Sleep Diagnosis and Therapy

Sleep Diagnosis and Therapy

Official Publication of the American Sleep and Breathing Academy

New Study: Lunar cycle modulates human sleep and melatonin rhythms

July 26, 2013 by admin

Researcher Prof Christian Cajochen and colleagues from Basel University in Switzerland found evidence of a lunar influence in a study of 33 volunteers sleeping in tightly controlled laboratory conditions.

Published in the journal Current Biology the study “Evidence that the Lunar Cycle Influences Human Sleep” found that the volunteers fell asleep 5 minutes later, had 20 minutes less sleep, 30% less deep sleep.

Read Abstract Here

When the Moon was round, the volunteers took longer to nod off and had poorer quality sleep, despite being shut in a darkened room, Current Biology reports. They also had a dip in levels of a hormone called melatonin that is linked to natural-body clock cycles. When it is dark, the body makes more melatonin. And it produces less when it is light.

Lunar rhythms
The volunteers were unaware of the purpose of the study and could not see the Moon from their beds in the researchers’ sleep lab. They each spent two separate nights at the lab under close observation. Findings revealed that around the full Moon, brain activity related to deep sleep dropped by nearly a third. Melatonin levels also dipped. The volunteers also took five minutes longer to fall asleep and slept for 20 minutes less when there was a full Moon. Prof Cajochen said: “The lunar cycle seems to influence human sleep, even when one does not ‘see’ the Moon and is not aware of the actual moon phase.” Some people may be exquisitely sensitive to the Moon, say the researchers. Their study did not originally set out to investigate a lunar effect. The researchers had the idea of doing the lunar analysis years later, while chatting over a few drinks.

They went back to their old data and factored in whether or not there had been a full Moon on the nights the volunteers had slept in their lab. UK sleep expert Dr Neil Stanley said, nonetheless, the small study appeared to have significant findings. “There is a such a strong cultural story around the full Moon that it would not be surprising if it has an effect. “It’s one of these old myths that you would suspect has a germ of truth. “It’s up to science now to find out what’s the cause of why we might sleep differently when there’s a full Moon.”

Source: Elsevier

Filed Under: Articles, Blog

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SleepDT Sleep Diagnosis and Therapy is a clinical Journal for allied Sleep Professionals, Neurologists, Psychiatrists, Pulmonologists, Primary Care Physicians, and other medical specialists. We also advocate on behalf of patient care in the field of Sleep Medicine

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