Yawn always synonymous with a sleepy, despite academic study had a more scientific answer to this question.
Binghamton University research team concluded that yawning has something to do with the temperature in our brain. That is, yawn serves to "cool down" our brain.
Analogues as follows: Our brain works like a computer. Well, the computer can operate efficiently when kept cool. Because that's needed components such as fans, heat sink, so that the computer does not heat up quickly and stop working.
Likewise, the brain, the heating that occurs through the activity of thinking and moving to make the temperature rise sharply in the brain. Yawning also a solution to restore a stable temperature for the activity of the brain itself.
Yawning also seems to be part of a moment of transition in the brain. Such as in the period before bed and after waking. Conditions such as multiple sclerosis (involving the thermoregulatory dysfunction), migraine and epileptic seizures are also suspected to be the cause of excessive yawning attack.
So, why is yawning so contagious?
The researchers believe, we often yawning when you see someone else yawn as the first automatic mechanism and associated with the suggestion. Studies show that contagious yawning also may be associated with a tendency toward empathy; trying to understand a touch with other people.
It is estimated, 55% of people will yawn within five minutes after seeing someone else yawn.
Interestingly, a 2007 study found that children with autism spectrum disorder does not increase the frequency of yawning after seeing a video of other people yawning. This supports the claim that yawning contagion in touch with empathic capacity.


