5 Unique Facts about yawning is rarely known

Yawning is a normal thing that is done by everyone. Yawning can indicate that a person is sleepy or too tired. Although yawning is a common thing happening in the real world, the fact is many people do not know much about yawning.

There are many theories put forward by researchers about yawning, but very little evidence that could explain it. For example, yawning can be caused by a tired body or lack of oxygen. But a study in 1986 also showed that boredom can lead a person to yawn.

What's more unique facts behind the yawning habits? This he penjabarannya, as reported by the Huffington Post (10/06).

 
1. Yawning can be contagious
It's true, and maybe you've been there. One study showed that when shown videos of people being evaporated, about 50 percent of people will be yawning. It even happens to the animals! A 2004 study found that animals also evaporates when looking at other animals or even humans yawn.

But apparently this is not unusual. Robert Provine, a psychologist and neurologist explained that some human reactions can indeed be contagious to others such as laughter and yawning behavior. People who are easily "catch" when seeing others yawn is also considered to have a sense of empathy and social awareness high.

 
2. Yawning is more contagious among friends
A study in 2012 showed that not all habits can be contagious yawning. Yawning can be very contagious among friends or someone with a close relationship. Researchers showed that the closer you are to someone, the more likely you will be infected when they yawn. This makes sense in light of the theory of empathy on the first point.

 
3. Yawning could be a sign of a disease
Yawning may not be the sign of a very serious illness or dangerous. But if you constantly yawning, it could indicate there is something wrong with your health. It could be related to the brain, heart, nerves, or trouble sleeping.

 
4. The fetus can also evaporate
Although the cause is unknown, but research suggests that the fetus in the womb can also evaporate. A study in 2012 showed that the fetus image was opening his mouth. Researchers assume that it is related to brain development in the fetus. In addition, fetal yawning can be a sign of normal development.

 
5. The average person yawn for 6 seconds
Perhaps there is no research that can explain this theory, but some research suggests that the average person's yawn for six seconds. For six seconds, the heart rate increases. A study in 2012 also showed that the psychological and human body change before and after yawning. Change and mental body in just six seconds. In addition, they also found that the effects on the body evaporates it can not be replaced by anything, even by way of a deep breath.

Those are some unique facts about the habits of the usual yawn by everyone.

Sources:
http://www.merdeka.com/sehat/5-fakta-unik-tentang-menguap-yang-jarang-diketahui.html