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the involuntary ejection of air and gases from the stomach through the mouth as a result of spasms of the gastric pylorus with simultaneous reflex muscle contractions in the stomach, diaphragm, and abdomen. Eructation in healthy persons is episodic, occurring, for example, only with overeating.

Regularly occurring, loud eructation arises as a result of swallowing air, most often in neurotics. Frequent eructation may be a symptom of a gastric disease, for example, chronic gastritis or an ulcer, or of diseases of other organs in the abdominal cavity, for example, the liver or gallbladder. Occasionally, food particles are ejected from the stomach along with gases and air; this is called regurgitation and is especially frequent with nursing infants who overeat.

Sour eructation is accompanied by ejection of gastric juice, and bitter eructation, by ejection of bile. The odor of rotten eggs is noticeable with eructation when food masses are stuck in the stomach as a result of pyloric stenosis; the odor indicates putrefaction in the stomach. Eructation is treated by healing the underlying cause.

References in periodicals archive ?
Studies claim cows can emit anywhere from 100 litres, or about 26-53 gallons, to 500 litres, about 132 gallons, of methane a day mainly through burping but also flatulence as they chew the cud.
If the burping continues, they can take you to a doctor to make sure that your stomach is working as it should.
Brits also savour dirty habits such as picking our noses, squeezing spots and burping out loud at home, the survey adds.
WESTWOOD - Robin Williams got slimed and Justin Timberlake beat Hugh Jackman in the burping contest - that's really all you need to know about Nickelodeon's Kids' Choice Awards, since the awards themselves matter so little they didn't even hand all of them out.
Although burping is a normal function of the digestive system, it can be embarrassing at times.
Normal burping is caused by air we swallow while eating and usually ceases within an hour of finishing the meal.
Burping is your body's way of releasing that excess air.
NOSEPICKING, burping and passing wind in public are rife among the population, according to a survey which questioned 6,000 people about their personal habits.
In the no man's land between the Muslim and Jewish Quarters of the Old City of Jerusalem, a burping contest between two boys begins.
A WACKY science exhibition which teaches children about burping and breaking wind opened to the public yesterday.
Larger than traditional cloths used for burping, it is also equipped with a Velcro fastener to hold it firmly in place.