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Results of a new study says, yawning is to cool the brain activity that is "hot". According to the study researchers from Austria, the current ambient air is hotter than the temperature of the body, many people tend to evaporate in order to "cool" their brains.
In this study, researchers bernard headed by Jorg Massen of the University of Vienna evaporated track the behavior of people walking in Vienna, Luxembourg, during the summer john cold. Researchers then compared the results with a similar study conducted in Illinois.
In addition, the researchers also conducted another study on the number of participants to see images of people yawning. The goal is to spark the participants to experience what is called "contagious yawning". Researchers then analyzed the behavior of participants evaporated.
The results showed, people in Vienna more evaporate in summer than winter. It is precisely contrary to those in Illinois. Researchers also found that contagious yawning is most prevalent when the air temperature was about 20 degrees Celsius.
The study, published in the journal Physiology & Conduct that was concluded, evaporates to cool the brain will not occur when the ambient temperature is not as hot or hotter than the body. The mechanism of cooling the brain is also not necessary in the cold.
During this time evaporated believed to increase the supply of oxygen to the body, but researchers say there are no studies that prove so. Therefore, they argue, that occurs spontaneously evaporates or because the follow people around who were vaporized still aims to cool the brain.
Cooling the brain known to be beneficial to the performance of the brain. The opinion calls can be contagious yawning is also associated with the evolution that enhances the taste sighted at a number of groups of people.
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