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Yawning possible causes:

The first assertion is that yawning occurs is that if someone's blood is increased in carbon content and therefore needs oxygen (or carbon dioxide emptying), which induce yawning. Researchers in the truth of this statement since Hippocrates believed in, but research has shown that it is incorrect or, at best, even misstatement. The yawning is actually less in comparison to normal inhaled oxygen in the body.

Another suspected reason for the yawn effect, the individual's desire kinyújtóztatására muscles. The yawning is often linked with the need for stretching. The animals must be ready every second to be able to swing into action. The muscles are able to do so much better that you are sufficiently lazulva, for example why. athletes prior to training.

The nervousness is also ranked among the possible causes. Other sources claim that yawning may help alert the person of the increase, it was observed that the paratroopers yawn moments before they jump.

Another view of the yawn that the body uses to regulate the temperature of the brain. The procedure, which serves to cool the brain, is very similar to the way the fans működnek.2007 computers in the University of Albany's research group made the claim that yawning may be necessary to keep the brain cool. The mammalian brain is a narrow temperature range works best. Experiments showed that when subjects held an object cooled their foreheads, and lélegezhettek strictly through the nose, you were less susceptible to contagious ásításról viewed videos.

Another similar recent hypothesis that yawning plays a role in regulating body temperature. Jared and Guttmann Dopart by Celent study has shown that if the subject's ear and ear plugs are placed so you can humidify the subject's ears and the environment due to air movement in the breeze is heard. Guttman and Dopart believe that yawning is one of the following three possible reasons occurs due to: the brain is cooled in the oxygen-or outflow due to the reduced pressure in the brain of oxygen in breath.