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Burping

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Burp
Other namesBelching, ructus, eruptus, eructation, mouth flatus
SpecialtyGastroenterology

Burping (also called belching and eructation) is the release of gas from the upper digestive tract (esophagus and stomach) of animals through the mouth. It is usually audible.

In humans, burping can be caused by normal eating processes, or as a side effect of other medical conditions. There is a range of levels of social acceptance for burping: within certain contexts and cultures, burping is acceptable and may even be perceived as humorous, while in others it is seen as impolite or even offensive and therefore unacceptable.

Humans are not the only animals that burp: it is very common among other mammals. In particular, burping by domesticated ruminants, such as cows or sheep, is a major contributor of methane emissions and may have a negative effect on the environment. Significant research is being done to find mitigation strategies for ruminant burping, i.e. modifying the animals' diets with Asparagopsis taxiformis (red seaweed).[1]

Causes

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Complications

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In microgravity environments, burping is frequently associated with regurgitation, known as wet burping. With reduced gravity, the stomach contents are more likely to rise up into the esophagus when the gastroesophageal sphincter is relaxed, along with the expelled air.[9]

Disorders

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Society and culture

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Acceptance

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Some South Asian cultures view burping as acceptable in particular situations. For example, a burping guest can be a sign to the host that the meal satisfied them and they are full.[18]

In Japan, burping during a meal is considered bad manners.[19] Burping during a meal is also considered unacceptable in Western cultures, such as North America and Europe.[18]

Despite virtually no scientific research on the subject, small online communities exist for burping as a sexual fetish.[20] Online, people of any sexual orientation anecdotally report some attraction to burping, with what appears to be psychological and/or behavioural overlaps with other sexual fetishes including body inflation, feedism, vorarephilia, and farting fetishes.[21] Anecdotally, the 'loudness' aspect appears to be an important element to burp fetishists. Despite being a rather uncommon fetish,[22] it continues to follow a general well-known pattern of sexual behaviour where hearing influences sexual arousal and response, noting that "it is the noise made rather than the action itself that appears to be what is sexualized and/or interpreted by the fetishist as sexually pleasurable and arousing".[21]

Infants

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An infant being burped against an adult's shoulder

Babies are likely to accumulate gas in the stomach while feeding and experience considerable discomfort (and agitation) until assisted. Burping an infant involves placing the child in a position conducive to gas expulsion (for example against the adult's shoulder, with the infant's stomach resting on the adult's chest) and then lightly patting the lower back. Because burping can cause vomiting, a "burp cloth" or "burp pad" is sometimes employed on the shoulder to protect clothing.[23]

Contest

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The Guinness World Record for the loudest burp was 112.4 dB, set by Neville Sharp from Darwin, Australia in 2021.[24] This is approximately as loud as a jet engine at 100 m (330 ft).[25] The record was previously held by Paul Hunn, who held the record for 12 years.[26]

Burped speech

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It is possible to voluntarily induce burping through swallowing air and then expelling it, and by manipulation of the vocal tract produce burped speech.

While this is often employed as a means of entertainment or competition, it can also act as an alternative means of vocalisation for people who have undergone a laryngectomy, with the burp replacing laryngeal phonation. This is known as esophageal speech.

Other animals

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Many other mammals, such as cows, dogs and sheep, also burp.

Ruminants

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Much of the gas expelled is produced as a byproduct of the ruminant's digestive process. These gases notably include a large volume of methane, produced exclusively by a narrow cohort of methanogenic archaea in the animal's gut; Escherichia coli (E. coli) and other bacteria lack the enzymes and cofactors required for methane production. A lactating cow produces about 322g of methane per day,[27] i.e. more than 117 kg per year through burping and exhalation, making commercially farmed cows a major (37%)[28] contributor to anthropogenic methane emissions, and hence to the greenhouse effect. 95% of this gas (wind) is emitted through burping.[29] This has led scientists at the Commonwealth Scientific and Industrial Research Organisation of Perth, Australia, to develop an anti-methanogen vaccine to minimize methane in cow burps.[30]

One reason why cows burp so much is that they are often fed foods that their digestive systems cannot fully process, such as corn and soy. Some farmers have reduced burping in their cows by feeding them alfalfa and flaxseed, which are closer to the grasses that they had eaten in the wild before they were domesticated.[31]

Birds

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There is no documented evidence that birds burp, though ornithologists believe that there is nothing which physiologically prevents them from doing so. However, since the microbiota of birds do not include the same set of gas-producing bacteria that mammals have to aid in digestion, gas hardly builds up in the gastrointestinal tracts of birds.[32]

See also

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References

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  1. ^ Fox, Alex. "Seaweed-Fed Cows Burp Less Planet-Warming Methane". Smithsonian Magazine. Retrieved 28 March 2021.
  2. ^ Cormier, René E. (1990), Walker, H. Kenneth; Hall, W. Dallas; Hurst, J. Willis (eds.), "Abdominal Gas", Clinical Methods: The History, Physical, and Laboratory Examinations (3rd ed.), Butterworths, ISBN 040990077X, PMID 21250257
  3. ^ "Practical tips to reduce bloating, belching and gas". Mayo Clinic. Retrieved 14 August 2024.
  4. ^ "DailyMed: About DailyMed". Retrieved 4 October 2014.
  5. ^ "DailyMed: About DailyMed". Retrieved 4 October 2014.
  6. ^ "Eructation (Professional Guide to Signs & Symptoms (Fifth Edition)) - WrongDiagnosis.com". Better Medicine. Archived from the original on 17 July 2012. Retrieved 4 October 2014.
  7. ^ "Belching: MedlinePlus Medical Encyclopedia". medlineplus.gov. Retrieved 30 April 2020.
  8. ^ Hopman, Wim P; van Kouwen, Mariëtte C; Smout, André J (14 April 2010). "Does (supra)gastric belching trigger recurrent hiccups?". World Journal of Gastroenterology. 16 (14): 1795–1799. doi:10.3748/wjg.v16.i14.1795. PMC 2852831. PMID 20380015.
  9. ^ Kloeris, Vickie; Keith, Lori (1 May 2001). "Eating on the ISS". National Aeronautics and Space Administration. Archived from the original on 30 September 2006. Retrieved 12 November 2011.
  10. ^ Kahrilas, PJ; Dodds, WJ; Hogan, WJ (October 1987). "Dysfunction of the belch reflex. A cause of incapacitating chest pain". Gastroenterology. 93 (4): 818–22. doi:10.1016/0016-5085(87)90445-8. PMID 3623025.
  11. ^ a b Oude Nijhuis, Renske A.B.; Snelleman, Jurjaan A.; Oors, Jac M.; Kessing, Boudewijn F.; Heuveling, Derrek A.; Schuitenmaker, Jeroen M.; ten Cate, Liesbeth; Smout, Andreas J.P.M.; Bredenoord, Albert J. (26 August 2021). "The inability to belch syndrome: A study using concurrent high-resolution manometry and impedance monitoring". Neurogastroenterology & Motility. 34 (5). Wiley: e14250. doi:10.1111/nmo.14250. ISSN 1350-1925. PMC 9285907. PMID 34435723.
  12. ^ a b Kahrilas, Peter J. (4 February 2022). "Retrograde upper esophageal sphincter function… and dysfunction". Neurogastroenterology & Motility. 34 (5). Wiley: e14328. doi:10.1111/nmo.14328. ISSN 1350-1925. PMC 9007908. PMID 35122356.
  13. ^ Karagama, Yakubu (January 2021). "Abelchia: inability to belch/burp-a new disorder? Retrograde cricopharyngeal dysfunction (RCPD)". European Archives of Oto-rhino-laryngology. 278 (12): 5087–5091. doi:10.1007/s00405-021-06790-w. ISSN 1434-4726. PMC 8553696. PMID 33893849.
  14. ^ Bastian, Robert W.; Smithson, Melissa L. (15 March 2019). "Inability to Belch and Associated Symptoms Due to Retrograde Cricopharyngeus Dysfunction: Diagnosis and Treatment". OTO Open. 3 (1): 2473974X1983455. doi:10.1177/2473974X19834553. PMC 6572913. PMID 31236539.
  15. ^ Bastian, Robert W.; Smithson, Melissa L. (2019). "Inability to Belch and Associated Symptoms Due to Retrograde Cricopharyngeus Dysfunction: Diagnosis and Treatment". OTO Open. 3 (1): 2473974X1983455. doi:10.1177/2473974X19834553. PMC 6572913. PMID 31236539.
  16. ^ Bastian, Dr. Robert (24 September 2021). "Can't Burp? Comprehensive Resources for R-CPD (in One Place)". Laryngopedia. Retrieved 24 August 2022.
  17. ^ Bastian, Robert W.; Hoesli, Rebecca C. (January 2020). "Partial Cricopharyngeal Myotomy for Treatment of Retrograde Cricopharyngeal Dysfunction". OTO Open. 4 (2): 2473974X2091764. doi:10.1177/2473974X20917644. PMC 7163242. PMID 32328538.
  18. ^ a b Mehrotra, Shirin (10 October 2011). "To burp or not to burp". BURRP!. Archived from the original on 30 October 2013. Retrieved 30 October 2013.
  19. ^ "Dining Etiquette in Japan | articles | cultural services". Kwintessential.co.uk. Archived from the original on 29 October 2013. Retrieved 22 January 2014.
  20. ^ Gander, Kashmira (24 November 2016). "Inside The World Of The Burping Fetish Community". Independent.co.uk. Retrieved 22 June 2021.
  21. ^ a b Griffiths, Mark (22 September 2014). "Belch rare bit: A very brief look at burping fetishes". Retrieved 22 June 2021.
  22. ^ Mulherin, Lizzie (30 November 2016). "'It's a major turn on': Is this the most UNUSUAL fetish of all time?". Retrieved 22 June 2021.
  23. ^ "Burping a Baby - Topic Overview". WebMD. 18 February 2013. Retrieved 16 April 2015.
  24. ^ "Loudest burp (male)". Guinness World Records. 29 July 2021. Retrieved 12 January 2024.
  25. ^ "Decibel levels". www1.lasalle.edu. Retrieved 2 November 2018.
  26. ^ Suggitt, Connie. "Loudest burp record broken for first time in over a decade". Guinness World Records. Retrieved 13 January 2024.
  27. ^ Grainger, C.; Clarke, T.; McGinn, S.M.; Auldist, M.J.; Beauchemin, K.A.; Hannah, M.C.; Waghorn, G.C.; Clark, H.; Eckard, R.J. (2007). "Methane Emissions from Dairy Cows Measured Using the Sulfur Hexafluoride (SF6) Tracer and Chamber Techniques". Journal of Dairy Science. 90 (6): 2755–2766. doi:10.3168/jds.2006-697. PMID 17517715.
  28. ^ Gerber, Pierre. "Livestock's Long Shadow" (PDF).
  29. ^ Polakovic, Gary (13 July 2003). "Bovine belching called udderly serious gas problem: Global warming concerns spur effort to cut methane". Archived from the original on 13 August 2004.
  30. ^ Nowak, R. (5 September 2004). "Burp vaccine cuts greenhouse gas emissions". New Scientist.
  31. ^ "Greening the Herds: A New Diet to Cap Gas". The New York Times. 4 June 2009.
  32. ^ Schwanke, Catherine (4 June 2009). "Is It True That Birds Can't Fart?". Popular Science. Archived from the original on 26 April 2016. Retrieved 18 June 2016.
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