Lack of oxygen, cause of yawning

One of the most contagious expressions of the human being are yawns, that is, it is inevitable to see yawn to someone and not repeat the action, especially when it comes to family members or people with emotional ties.

According to a study of Museum of Natural History of the University of Pisa and the Institute of Cognitive and Technological Sciences of Rome , the yawns they are a reflection generated by the empathy , that is, it is a mechanism to exchange emotions .

The Italian researchers Iván Norsica and Elisabetta Papalagi consider that yawns they are a way of showing solidarity with people who experience a sensation that, in this case, is usually related to stress , anxiety , boredom or fatigue .

When analyzing relationships, countries of origin, gender and styles of yawns of more than 100 people, the scientists realized that the rate of infection of yawns is greater with relatives; then with friends or acquaintances and finally with strangers.

 

Lack of oxygen, cause of yawning

According to information published in National Geographic, a study of the University of the Maryland School of Dentistry , in Baltimore, reveals that yawns expand and contract the walls of the maxillary sinus to pump air, oxygenate the brain and decrease its temperature.

This, because the brain It is an organ very sensitive to temperatures, so it must remain cool to work properly. And you, how many times a day do you yawn?

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