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A study found that when there is an online media video showing people yawning, about 50 % of people who saw it also picked evaporated. It even happens among animals too!
According to Robert Provine, a psychologist and a neurologist at the University or college of Maryland , the reaction was not unusual . Some studies associate yawning with empathy.
"Yawning is more a social phenomenon than a psychological phenomenon" he said. That is why we yawn even when we are not sleepy.
2. Yawning may be a sign of disease
Usually not a sign of a serious disease, but excessive yawning may indicate there is something wrong signal from our sleep.
According to Nationwide Commence of Wellbeing, for some people, excessive yawning could be a reaction caused by the vagus nerve, which indicate heart problems.
In other rare cases, yawning is a sign there is a problem in the brain.
3. Yawning is contagious among close friends
Not everyone can "transmit" evaporate on us. According to research in 2012, evaporates more contagious among friends closer.
The researchers found that the closer we are genetically or emotionally with someone, the more likely we participate yawn when they evaporate.
This shows empathy theory earlier. Close friends and family have a stronger sense of each other.
4. On average we yawn for six seconds
Yawning usually occurs for six seconds. Within seconds, the heart rate increases significantly.
A study in 2012 to examine the body before during and after yawning. They find that there are physiological changes during the six seconds when yawning.
5. Fetus can yawn
No one knows for sure why. However, the unborn baby can evaporate.
When the researchers tested the 4D results in the year 2012, there is a picture that shows the baby was opening his mouth like a yawn.
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