Sleep is not only reason to yawn – its function is linked to your brain

tiredness sleep yawn 216 400x800stock_colors / iStock

Contrary to what many people think, yawning indicates not only lack of sleep or sleepless nights. Although still surrounded by mysteries yet to be revealed by science, the act of opening the mouth, seek and expel the air has had his motives discovered: the phenomenon is to "refresh" the brain and thus cause us to stay awake.

When we are sleepy or in poorly ventilated areas, an oxygen loss is experienced by the central nervous system and, once detected, it forces us to exercise involuntary stimulus inspiration to awaken the brain and body through its oxygenation.

Why yawning is uncontrollable?

sleep yawning stretchstock_colors / iStock

Contrary to what many people think, yawning indicates not only lack of sleep or sleepless nights. Although still surrounded by mysteries yet to be revealed by science, the act of opening the mouth, seek and expel the air has had his motives discovered: the phenomenon is to "refresh" the brain and thus cause us to stay awake.

When we are sleepy or in poorly ventilated areas, an oxygen loss is experienced by the central nervous system and, once detected, it forces us to exercise involuntary stimulus inspiration to awaken the brain and body through its oxygenation.

Why yawning is uncontrollable?

sleep yawning stretch

You can even try to close his mouth to disguise the yawning, but it will certainly realize that it does not fail to occur, since the muscles triggered by reflex continue its contraction.

Who has at home a pet may have noticed that yawning is not unique to humans. Your dog or cat also promote the act, as well as many other animals. But know that there is a time difference between yawns, according to each species.

As yawning is related to the number of neurons and complexity of the brain, the act among human lasts about 6 seconds while among the rats, for example, the phenomenon lasts an average of only 2 seconds.

Why do we yawn when someone yawns?

woman yawning kitten 116 400x800Lapina / Shutterstock

It's inevitable: when you see someone yawning at his side or even on TV immediately feel an uncontrollable urge to also open the Gobber. The action takes place because of so-called neurons mirrors, as well as a laugh, you can also consider contagious yawning.

The act of yawning is still related to empathy, that is, do not worry if you "copy" the reflection. A survey by Baylor University, Texas, USA, indicated that psychopaths do not feel the need to yawn when they see another person yawning because who suffer from personality disorder is simply not able to react to human feelings.

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