Why does yawning infect?

A person yawns and people around him are following him one after another. Why is it "contagious "? Psychologist at the University of drezeiser
Steven plasc believes that the so-called yawning spread is more likely to be in empathy groups, that is, those who like to imagine themselves as others.
Occurred.

To verify this idea, prac and his colleagues at New York State University asked volunteers to watch a video of people yawning. Result 4:
More than 0% of volunteers yawned with people on the screen, and 60% of the people who were "Infected" were playing more than one
Yes. The researchers immediately asked the group to undergo a testing of empathy, and their scores were very high.

Prac said these people are the kind of people who say "" when others step on things. The result explains why a mental patient
It is rarely infected by people yawning because it is difficult for them to carry out empathy activities. On the one hand, there is another saying: Why are 100,000
On

There are three theories that yawning is contagious. These three theories are: physiological theory, tired theory, and evolutionary theory.
Physiological theories hold that yawning is a response to the brain's awareness of the need to supplement oxygen. Yawning is infectious because it is in a room
Everyone in the room may feel the need to supplement oxygen at the same time. Yawning may also be stimulated by external factors
Seeing others eat will feel like hunger.
The assumption behind the theory of boredom is that if everyone feels bored with something, they will yawn. However, this theory cannot be explained.
Why do people yawn when they get bored? Unless they use the form language as an instinctive way to express their feelings for something.
Fun.
According to evolutionary theory, people yawned to expose their teeth. This behavior was passed down by our original ancestor. Yawning may be sent to someone else.
An action that generates a warning. Given that human development has entered a civilized society, it is no longer time to warn others by yawning.

As we have not yet found the exact cause of the appeal of yawning, this problem remains a mystery.
Some people also say that yawning is because the body is tired and requires Oxygen supplementation. Therefore, it is necessary to inhale a large amount of air in the mouth and nose to obtain oxygen.
It is said that it is a kind of subconscious competition for human beings.
Competing instinct, because when someone starts to yawn in a place, it may imply that the air in this place is not enough.
Instinctively, humans subconsciously remind themselves to quickly take a big breath of air, so as not to breathe when the air <oxygen> is insufficient
Fresh air, because survival is an instinct, It is a subconscious reaction, so even if you see the picture, there will be a response <just like boys see the report
Chapter magazine's refreshing pictures have a physiological reaction, and the brain is hinted at by stimulation. The fake things are also true -----------------
--------------------------- Another saying is: yawning does not seem to indicate fatigue.
It also has a more general significance, that is, changes in the body. Studies show that when people are tired, awake, or otherwise alert
When the state changes, it all yawns.
Yawning is characterized by a deep breath of mouth opening, and the chin and body muscles also stretch. Many animals will fight
And this action involves the interaction between the unconscious brain and the body.
Over the years, people have thought that when the peripheral tissue of the lung detects a low oxygen concentration in the lung, people may yawn to breathe more air. But I
We now know that the lung may not necessarily detect oxygen insufficiency. In addition, although the lungs of the fetus in the uterus cannot breathe, the fetus has been beaten
Yawning. In addition, the breathing and yawning actions are controlled in different brain regions. When the oxygen concentration in the coreness of the Subventricular nucleus located in the lower visual hill of the brain decreases
It will make people yawn. Another hypothesis is that yawning stems from fatigue and boredom. But this may also be wrong, because the coreness is also in the penis.
An erection plays a role-the penis is usually not bored.
Apart from other functions, the coreness of the lower view hill seems to be the brain's "yawning Hub 」. The Cortana nucleus contains some chemistry that can cause yawning.
Information molecules, including dopamine, amine acid, oxytocin, and adrenal cortex. Taking adrenal cortex as an example, it will turn around at night and wake up
And cause people to yawn and stretch their muscles. Yawning also seems to require nitric oxide produced by specific peripheral nucleus nerve cells. These
When the cells are stimulated, the brain stem and (or) hippocampus cells are activated, causing yawning. Yawning also seems to have feedback ingredients: If
The whole yawning process is not so satisfactory.
It is correct to say that yawning is contagious. People can really just see, hear, or think of yawning,
There is little to know about the cause; there have been many theories that want to explain this phenomenon over the years. There is evidence that yawning is an animal in the environment or body.
One way to send these messages to other animals when the condition changes may be to coordinate the behavior of the animals. If so
Then, the human yawning behavior is most likely an evolutionary heritage that has lost its meaning.