wanweipedia

Lunar effect

Biologists as well as artists and poets have long thought about the Moon's influence on living creatures.
A lunar syzygy increases tidal range importantly for some maritime species. Despite all of the beliefs, no valid scientific study has ever found another significant effect of the full Moon on life on Earth.

The lunar effect is a correlation between specific stages of the roughly 29.5-day lunar cycle and behavior and physiological changes in living beings on Earth, including humans. In some cases the purported effect may depend on external cues, such as the amount of moonlight. In other cases, such as the approximately monthly cycle of menstruation in humans (but not other mammals), the coincidence in timing reflects no known lunar influence.

A considerable number of studies have examined the effect on humans. By the late 1980s, there were at least 40 published studies on the purported lunar-lunacy connection,[1] and at least 20 published studies on the purported lunar-birthrate connection.[2] This has allowed several extensive literature reviews and meta-analyses to be produced, which have found no correlation between the lunar cycle and human biology or behavior.[1][2][3][4]

Contexts

Claims of a lunar connection have appeared in the following contexts:

Fertility

It is widely believed that the Moon has a relationship with fertility due to the corresponding human menstrual cycle, which averages 28 days.[5][6][7] However, no connection between lunar rhythms and menstrual onset has been conclusively shown to exist, and the similarity in length between the two cycles is most likely coincidental.[8][9]

Birth rate

Multiple studies have found no connection between birth rate and lunar phases. A 1957 analysis of 9,551 births in Danville, Pennsylvania, found no correlation between birth rate and the phase of the Moon.[10] Records of 11,961 live births and 8,142 natural births (not induced by drugs or cesarean section) over a 4-year period (1974–1978) at the UCLA hospital did not correlate in any way with the cycle of lunar phases.[11] Analysis of 3,706 spontaneous births (excluding births resulting from induced labor) in 1994 showed no correlation with lunar phase.[12] The distribution of 167,956 spontaneous vaginal deliveries, at 37 to 40 weeks gestation, in Phoenix, Arizona, between 1995 and 2000, showed no relationship with lunar phase.[13] Analysis of 564,039 births (1997 to 2001) in North Carolina showed no predictable influence of the lunar cycle on deliveries or complications.[14] Analysis of 6,725 deliveries (2000 to 2006) in Hannover revealed no significant correlation of birth rate to lunar phases.[15] A 2001 analysis of 70,000,000 birth records from the National Center for Health Statistics revealed no correlation between birth rate and lunar phase.[16] An extensive review of 21 studies from seven different countries showed that the majority of studies reported no relationship to lunar phase, and that the positive studies were inconsistent with each other.[2] A review of six additional studies from five different countries similarly showed no evidence of relationship between birth rate and lunar phase.[17]

Blood loss

It is sometimes claimed that surgeons used to refuse to operate during the full Moon because of the increased risk of death of the patient through blood loss.[18][failed verification][citation needed] One team, in Barcelona, Spain, reported a weak correlation between lunar phase and hospital admissions due to gastrointestinal bleeding, but only when comparing full Moon days to all non-full Moon days lumped together.[18] This methodology has been criticized, and the statistical significance of the results disappears if one compares day 29 of the lunar cycle (full Moon) to days 9, 12, 13, or 27 of the lunar cycle, which all have an almost equal number of hospital admissions.[19] The Spanish team acknowledged that the wide variation in the number of admissions throughout the lunar cycle limited the interpretation of the results.[18]

In October 2009, British politician David Tredinnick asserted that during a full Moon "[s]urgeons will not operate because blood clotting is not effective and the police have to put more people on the street.".[20] A spokesman for the Royal College of Surgeons said they would "laugh their heads off" at the suggestion they could not operate on the full Moon.[21]

Human behavior

Mental Illness

Two studies found evidence that those with mental disorders i.e. Schizophrenia generally exhibit 1.8% (< 2.0 percent is statistically irrelevant) of increased violent or aggressive episodes during the full Moon,[22][23] but a more recent study found no such correlation to that of nonschizophrenic human beings.[24] An analysis of mental-health data found a significant effect of Moon phases, but only on schizophrenic patients.[25]

Epilepsy

A study into epilepsy found a significant negative correlation between the mean number of epileptic seizures per day and the fraction of the Moon that is illuminated, but the effect resulted from the overall brightness of the night, rather than from the moon phase per se.[26]

Law and order

Senior police officers in Brighton, UK, announced in June 2007 that they were planning to deploy more officers over the summer to counter trouble they believe is linked to the lunar cycle.[27] This followed research by the Sussex Police force that concluded there was a rise in violent crime when the Moon was full. A spokeswoman for the police force said "research carried out by us has shown a correlation between violent incidents and full moons". A police officer responsible for the research told the BBC that "From my experience of 19 years of being a police officer, undoubtedly on full moons we do seem to get people with sort of strange behavior – more fractious, argumentative."[28]

Police in Ohio and Kentucky have blamed temporary rises in crime on the full Moon.[29][30][31] In January 2008, New Zealand's Justice Minister Annette King suggested that a spate of stabbings in the country could have been caused by the lunar cycle.[32]

A reported correlation between Moon phase and the number of homicides in Dade County was found, through later analysis, not to be supported by the data and to have been the result of inappropriate and misleading statistical procedures.[3]

Motorcycle fatalities

A study of 13,029 motorcyclists killed in nighttime crashes found that there were 5.3% more fatalities on nights with a full moon compared to other nights.[33] The authors speculate that the increase might be due to visual distractions created by the moon, especially when it is near the horizon and appears abruptly between trees, around turns, etc.

Stock market

Several studies have argued that the stock market’s average returns are much higher during the half of the month closest to the new moon than the half closest to the full moon. The reasons for this have not been studied, but the authors suggest this may be due to lunar influences on mood.[34][35][36] Another study has found contradictory results and questioned these claims.[37]

Meta-analyses

A meta-analysis of thirty-seven studies that examined relationships between the Moon's four phases and human behavior revealed no significant correlation. The authors found that, of twenty-three studies that had claimed to show correlation, nearly half contained at least one statistical error.[1][3] Similarly, in a review of twenty studies examining correlations between Moon phase and suicides, most of the twenty studies found no correlation, and the ones that did report positive results were inconsistent with each other.[3] A 1978 review of the literature also found that lunar phases and human behavior are not related.[38]

Sleep quality

A July 2013 study carried out at the University of Basel in Switzerland suggests a correlation between the full Moon and human sleep quality.[39] Professor Cajochen and colleagues presented evidence that a lunar rhythm can modulate sleep structure in humans when measured under the highly controlled conditions of a circadian laboratory study protocol without time cues. Studying 33 volunteer subjects, the researchers found that subjective and objective measures of sleep varied according to lunar phase and thus may reflect human circalunar rhythmicity. Stringently controlled laboratory conditions, in a cross-sectional setting, were employed to exclude confounding effects such as increased light at night or the potential bias in perception. Measures of lunar influence on sleep structure, electroencephalographic activity during non-rapid eye movement sleep (NREM), and secretion of the hormones melatonin and cortisol, were retrospectively analyzed. At no point, during and after the study, were volunteers or investigators aware of the posteriori analysis relative to lunar phase. Around full Moon it was found that electroencephalogram (EEG) delta activity during NREM sleep, an indicator of deep sleep, decreased by 30%, time to fall asleep increased by five minutes, and EEG-assessed total sleep duration was reduced by 20 minutes. These changes were associated with a decrease in subjective sleep quality and diminished endogenous melatonin levels.[39] 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."[40]

There are suggestions that the 2013 Cajochen study is faulty because of a relatively small (n=33) sample size and inappropriate controls for age and sex.[41] A 2014 study with larger sample sizes (n1=366, n2=29, n3=870) and better experimental controls found no effect of the lunar phase on sleep quality metrics.[41] A 2015 study of 795 children found a three-minute increase in sleep duration near the full moon,[42] but a 2016 study of 5,812 children found a five-minute decrease in sleep duration near the full moon.[43] No other modification in activity behaviors were reported,[43] and the lead scientist concluded: "Our study provides compelling evidence that the moon does not seem to influence people's behavior."[44]

In animals

California grunion fish have an unusual mating and spawning ritual during the spring and summer months. The egg laying takes place on four consecutive nights, beginning on the nights of the full and new Moons, when tides are highest.[45] However, this is a well understood reproductive strategy that is more related to tides than it is to lunar phase. It happens to correlate with the lunar phase because tides are highest when the Sun, Earth, and Moon are aligned, i.e., at new Moon or full Moon.

Correlation between hormonal changes in the testis and lunar periodicity was found in streamlined spinefoot (a type of fish), which spawns synchronously around the last Moon quarter.[46] In orange-spotted spinefoot, lunar phases affect the levels of melatonin in the blood.[46]

Evidence for lunar effect in reptiles, birds and mammals is scant,[46] but among reptiles marine iguanas (which live in the Galápagos Islands) time their trips to the sea in order to arrive at low tide.[47]

In insects, the lunar cycle may affect hormonal changes.[46] The body weight of honeybees peaks during new Moon.[46] The midge Clunio marinus has a biological clock synchronized with the moon.[39][48]

Spawning of coral Platygyra lamellina occurs at night during the summer on a date determined by the phase of the Moon; in the Red Sea, this is the three- to five-day period around the new Moon in July and the similar period in August.[49] Acropora coral time their simultaneous release of sperm and eggs to just one or two days a year, after sundown with a full moon.[50]

A relationship between the moon and the birth rate of cows was reported in a 2016 study.[51]

In 2000, a retrospective study in the United Kingdom reported an association between the full moon and significant increases in animal bites to humans. The study reported that patients presenting to the A&E with injuries stemming from bites from an animal rose significantly at the time of a full moon in the period 1997-1999. The study concluded that animals have an increased inclination to bite a human during a full moon period.[52]

In plants

Serious doubts have been raised[53] about the claim that a species of Ephedra synchronizes its pollination peak to the full moon in July.[54]

See also

References

  1. ^ a b c Rotton, James; Kelly, I. W. (1985). "Much ado about the full moon: A meta-analysis of lunar-lunacy research". Psychological Bulletin. 97 (2): 286–306. doi:10.1037/0033-2909.97.2.286. ISSN 1939-1455. PMID 3885282.
  2. ^ a b c Martens, R.; Kelly, I. W.; Saklofske, D. H. (1988). "Lunar Phase and Birthrate: A 50-year Critical Review". Psychological Reports. 63 (3): 923–934. doi:10.2466/pr0.1988.63.3.923. ISSN 0033-2941. PMID 3070616. S2CID 34184527.
  3. ^ a b c d Kelly, Ivan; Rotton, James; Culver, Roger (1986), "The Moon Was Full and Nothing Happened: A Review of Studies on the Moon and Human Behavior", Skeptical Inquirer, 10 (2): 129–43. Reprinted in The Hundredth Monkey – and other paradigms of the paranormal, edited by Kendrick Frazier, Prometheus Books. Revised and updated in The Outer Edge: Classic Investigations of the Paranormal, edited by Joe Nickell, Barry Karr, and Tom Genoni, 1996, CSICOP.
  4. ^ Foster, Russell G.; Roenneberg, Till (2008). "Human Responses to the Geophysical Daily, Annual and Lunar Cycles". Current Biology. 18 (17): R784–R794. doi:10.1016/j.cub.2008.07.003. ISSN 0960-9822. PMID 18786384. S2CID 15429616.
  5. ^ Carroll, Robert Todd (12 August 2011). "Full Moon and Lunar Effects". The Skeptic's Dictionary. Retrieved 22 October 2011.
  6. ^ Chiazze, Leonard (1968). "The Length and Variability of the Human Menstrual Cycle". JAMA: The Journal of the American Medical Association. 203 (6): 377–80. doi:10.1001/jama.1968.03140060001001. ISSN 0098-7484. PMID 5694118.
  7. ^ Adams, Cecil (24 September 1999). "What's the link between the moon and menstruation?". The Straight Dope. Retrieved 14 December 2011.
  8. ^ William A. Gutsch (1997). 1001 things everyone should know about the universe (1st ed.). New York: Doubleday. p. 57. ISBN 9780385482233.
  9. ^ Barash, David P.; Lipton, Judith Eve (2009). "Synchrony and Its Discontents". How women got their curves and other just-so stories evolutionary enigmas ([Online-Ausg.]. ed.). New York: Columbia University Press. ISBN 9780231518390.
  10. ^ Abell, George; Greenspan, Bennett (1979), "The Moon and the Maternity Ward", Skeptical Inquirer, 3 (4): 17–25 Reprinted in Paranormal Borderlands of Science, edited by Kendrick Frazier, Prometheus Books, ISBN 0-87975-148-7.
  11. ^ Abell G.O. & Greenspan B. (1979). "Human Births and the Phase of the Moon". New England Journal of Medicine. 300 (2): 96. doi:10.1056/NEJM197901113000223. ISSN 0028-4793. PMID 758594. Cite uses deprecated parameter |lastauthoramp=
  12. ^ Joshi, Raksha; Bharadwaj, Anoopendra; Gallousis, Spiro; Matthews, Ronald (1998). "Labor ward workload waxes and wanes with the lunar cycle, myth or reality?". Primary Care Update for OB/GYNS. 5 (4): 184. doi:10.1016/S1068-607X(98)00100-0. ISSN 1068-607X. PMID 10838345.
  13. ^ Morton-Pradhan, Susan; Bay, R. Curtis; Coonrod, Dean V. (2005). "Birth rate and its correlation with the lunar cycle and specific atmospheric conditions". American Journal of Obstetrics and Gynecology. 192 (6): 1970–1973. doi:10.1016/j.ajog.2005.02.066. ISSN 0002-9378. PMID 15970864. S2CID 11111622.
  14. ^ Arliss, Jill M.; Kaplan, Erin N.; Galvin, Shelley L. (2005). "The effect of the lunar cycle on frequency of births and birth complications". American Journal of Obstetrics and Gynecology. 192 (5): 1462–1464. doi:10.1016/j.ajog.2004.12.034. ISSN 0002-9378. PMID 15902138.
  15. ^ Staboulidou, Ismini; Soergel, Philipp; Vaske, Bernhard; Hillemanns, Peter (2008). "The influence of lunar cycle on frequency of birth, birth complications, neonatal outcome and the gender: A retrospective analysis". Acta Obstetricia et Gynecologica Scandinavica. 87 (8): 875–879. doi:10.1080/00016340802233090. ISSN 0001-6349. PMID 18607814.
  16. ^ Caton, Dan (2001). "Natality and the Moon Revisited: Do Birth Rates Depend on the Phase of the Moon?" (PDF). Bulletin of the American Astronomical Society. 33 (4): 1371.
  17. ^ Kelly, I. W.; Martens, R. (1994). "Geophysical Variables and Behavior: LXXVIII. Lunar Phase and Birthrate: An Update". Psychological Reports. 75 (1): 507–511. doi:10.2466/pr0.1994.75.1.507. ISSN 0033-2941. PMID 7809325. S2CID 28757355.
  18. ^ a b c Roman, Eva Maria; Soriano, German; Fuentes, Mercedes; Galvez, Maria Luz; Fernandez, Clotilde (2004). "The influence of the full moon on the number of admissions related to gastrointestinal bleeding". International Journal of Nursing Practice. 10 (6): 292–296. doi:10.1111/j.1440-172x.2004.00492.x. ISSN 1322-7114. PMID 15544585.
  19. ^ Margot, JL (2015). "No evidence of purported lunar effect on hospital admission rates or birth rates". Nursing Research. 64 (3): 168–73. doi:10.1097/nnr.0000000000000086. PMC 4418782. PMID 25756232.
  20. ^ Hansard, 14 Oct 2009 : Column 414
  21. ^ Ian Douglas (11 October 2010). "MPs believe the funniest things". Daily Telegraph. Retrieved 18 October 2010.
  22. ^ Drum, M.; Terry, C.; Hammonds, C. (1986). "Lunar phase and acting-out behaviour". Psychological Reports. 59 (2 Pt 2): 987–990. doi:10.2466/pr0.1986.59.2.987. PMID 3809355. S2CID 1805151.
  23. ^ Lieber, A. (1978). "Human aggression and the lunar synodic cycle". Journal of Clinical Psychiatry. 39 (5): 385–392. PMID 641019.
  24. ^ Owen, C.; Tarantello, C.; Jones, M.; Tennant, C. (1998). "Lunar cycles and violent behaviour". Australian and New Zealand Journal of Psychiatry. 32 (4): 496–499. doi:10.3109/00048679809068322. PMID 9711362. S2CID 23450600.
  25. ^ Barr, W. (2000). "Lunacy revisited: The influence of the moon on mental health and quality of life". Journal of Psychosocial Nursing and Mental Health Service. 38 (5): 28–36. PMID 10820695.
  26. ^ Baxendale, Sallie; Fisher, Jennifer (2008). "Moonstruck? The effect of the lunar cycle on seizures". Epilepsy & Behavior. 13 (3): 549–550. doi:10.1016/j.yebeh.2008.06.009. ISSN 1525-5050. PMID 18602495. S2CID 5467531.
  27. ^ Attewill, Fred (5 June 2007). "Police link full moon to aggression". The Guardian. London. Retrieved 11 May 2010.
  28. ^ "Crackdown on lunar-fuelled crime". BBC News. 5 June 2007. Retrieved 26 July 2013.
  29. ^ toledoblade.com – Analysis shines light on full Moon, crime
  30. ^ Skeptic's Dictionary and Refuge: Mass Media Bunk
  31. ^ "Police busy for full moon". The Kentucky Post. E. W. Scripps Company. 29 January 2002. Archived from the original on 6 July 2007.
  32. ^ "Link between moon and crime supported – national". Stuff.co.nz. 7 February 2008. Retrieved 11 July 2011.
  33. ^ Redelmeier, D; Shafir, E (11 December 2017). "The full moon and motorcycle related mortality: population based double control study". BMJ. 359: j5367. doi:10.1136/bmj.j5367. PMID 29229755.
  34. ^ Yuan, Kathy Zhichao; Zheng, Lu; Zhu, Qiaoqiao (2001). "Are Investors Moonstruck? - Lunar Phases and Stock Returns". Journal of Empirical Finance. 13 (1): 1–23. doi:10.1016/j.jempfin.2005.06.001. SSRN 283156.
  35. ^ Yuan, Kathy; Zheng, Lu; Zhu, Qiaoqiao (2006). "Are investors moonstruck? Lunar phases and stock returns". Journal of Empirical Finance. 13 (1): 1–23. CiteSeerX 10.1.1.736.9528. doi:10.1016/j.jempfin.2005.06.001. ISSN 0927-5398.
  36. ^ Dichev, Ilia D.; Janes, Troy D. (2001). "Lunar Cycle Effects in Stock Returns". SSRN 281665.
  37. ^ Herbst, Anthony F. (2007). "Lunacy in the Stock Market—What is the Evidence?". Journal of Bioeconomics. 9 (1): 1–18. doi:10.1007/s10818-007-9016-3. ISSN 1387-6996. S2CID 154823157.
  38. ^ Campbell, D.E.; Beets, J.L. (1978). "Lunacy and the Moon". Psychological Bulletin. 85 (5): 1123–1129. doi:10.1037/0033-2909.85.5.1123. PMID 704720.
  39. ^ a b c Cajochen, Christian; Altanay-Ekici, Songül; Münch, Mirjam; Frey, Sylvia; Knoblauch, Vera; Wirz-Justice, Anna (2013). "Evidence that the Lunar Cycle Influences Human Sleep". Current Biology. 23 (15): 1485–1488. doi:10.1016/j.cub.2013.06.029. ISSN 0960-9822. PMID 23891110.
  40. ^ Roberts, Michelle (25 July 2013). "BBC News – Full Moon 'disturbs a good night's sleep'". BBC News. Bbc.co.uk. Retrieved 26 July 2013.
  41. ^ a b Cordi, Maren; Ackermann, Sandra; Bes, Frederik W.; Hartmann, Francina; Konrad, Boris N.; Genzel, Lisa; Pawlowski, Marcel; Steiger, Axel; Schulz, Hartmut; Rasch, Björn; Dresler, Martin (2014). "Lunar cycle effects on sleep and the file drawer problem". Current Biology. 24 (12): R549–R550. doi:10.1016/j.cub.2014.05.017. ISSN 0960-9822. PMID 24937275.
  42. ^ Sjödin, A.; Hjorth, M. F.; Damsgaard, C. T.; Ritz, C.; Astrup, A.; Michaelsen, K. F. (April 2015). "Physical activity, sleep duration and metabolic health in children fluctuate with the lunar cycle: science behind the myth". Clinical Obesity. 5 (2): 60–66. doi:10.1111/cob.12092. PMC 4672692. PMID 25808903.
  43. ^ a b Chaput, Jean-Philippe; Weippert, Madyson; LeBlanc, Allana G.; Hjorth, Mads F.; Michaelsen, Kim F.; Katzmarzyk, Peter T.; Tremblay, Mark S.; Barreira, Tiago V.; Broyles, Stephanie T.; Fogelholm, Mikael; Hu, Gang; Kuriyan, Rebecca; Kurpad, Anura; Lambert, Estelle V.; Maher, Carol; Maia, Jose; Matsudo, Victor; Olds, Timothy; Onywera, Vincent; Sarmiento, Olga L.; Standage, Martyn; Tudor-Locke, Catrine; Zhao, Pei; Sjödin, Anders M. (24 March 2016). "Are Children Like Werewolves? Full Moon and Its Association with Sleep and Activity Behaviors in an International Sample of Children". Frontiers in Pediatrics. 4: 24. doi:10.3389/fped.2016.00024. PMC 4805596. PMID 27047907.
  44. ^ "Does the moon affect our mood or actions?". www.sciencedaily.com. Retrieved 11 May 2016.
  45. ^ "What is a grunion?". Pepperdine University. Retrieved 17 September 2013.
  46. ^ a b c d e Zimecki, M (2006). "The lunar cycle: effects on human and animal behavior and physiology". Postepy Hig Med Dosw. 60: 1–7. PMID 16407788. Retrieved 24 July 2015.
  47. ^ Martin Wikelski; Michaela Hau (December 1995). "Is There an Endogenous Tidal Foraging Rhythm in Marine Iguanas?". Journal of Biological Rhythms. 10 (4): 335–350. doi:10.1177/074873049501000407. PMID 8639942. S2CID 21489198.
  48. ^ Tobias Kaiser; Dietrich Neumann; David Heckel (May 2011). "Timing the tides: genetic control of diurnal and lunar emergence times is correlated in the marine midge Clunio marinus". BMC Genetics. 12: 49. doi:10.1186/1471-2156-12-49. PMC 3124415. PMID 21599938.
  49. ^ Schlesinger, Y.; Loya, Y. (1991). Larval development and survivorship in the corals Favia favus and Platygyra lamellina. Developments in Hydrobiology. 66. pp. 101–108. doi:10.1007/978-94-011-3240-4_14. ISBN 978-94-010-5428-7.
  50. ^ Alex Riley (20 February 2016). "Playing Cupid to get reluctant corals in the mood for love". New Scientist.
  51. ^ Yonezawa, Tomohiro; Uchida, Mona; Tomioka, Michiko; Matsuki, Naoaki (31 August 2016). "Lunar Cycle Influences Spontaneous Delivery in Cows". PLOS ONE. 11 (8): e0161735. Bibcode:2016PLoSO..1161735Y. doi:10.1371/journal.pone.0161735. ISSN 1932-6203. PMC 5006988. PMID 27580019.
  52. ^ Yonezawa, Bhattacharjee; Bradle, Mona; Smith, Scally; Wilson (23 December 2000). "Do animals bite more during a full moon? Retrospective observational analysis". BMJ. 321 (7276): 1559–1561. doi:10.1136/bmj.321.7276.1559. PMC 27561. PMID 11124173.
  53. ^ Margot, JL (October 2015). "Insufficient Evidence of Purported Lunar Effect on Pollination in Ephedra". Journal of Biological Rhythms. 30 (5): 454–6. doi:10.1177/0748730415591662. PMID 26316347.
  54. ^ Rydin, C; Bolinder, K (April 2015). "Moonlight pollination in the gymnosperm Ephedra (Gnetales)". Biology Letters. 11 (4): 20140993. doi:10.1098/rsbl.2014.0993. PMC 4424609. PMID 25832814.

Bibliography

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