Why does yawning infect _ life health

A person yawns, the people around follow him to fight together, yawn why can "infect"? Psychologist at the University of Lake DE, USA
Steven Pras Czech believes that the so-called yawning infection is more likely in the empathy crowd, that is, those who like to imagine themselves as others
Happen.

To verify this view, Pilates Czech and his colleagues at the State University of New York asked volunteers to watch a video of people yawning. The result is 4.
More than 0% volunteers will yawn with the people on the screen, and 60% of those who are "infected" have more than one dozen.
Owe. The researchers then asked the people to accept empathy tests, and their scores were very high.

These people are the kind of people who shout "ouch" when they step on something, says Pratek. The results just explain why the mentally ill
It is rarely contagious by other people yawning because it is difficult for them to perform empathy activities. This is on the one hand, there is another saying, is 100,000 why
On the

There are three theories that make yawning contagious. These three theories are: physiology theory, boredom theory, evolution theory.
Physiological theory holds that yawning is a response to the brain's awareness of the need to replenish oxygen. Yawning is contagious because in a room
Everyone in the room is likely to feel the need to replenish oxygen at the same time. Yawning may also be stimulated by external factors, to a large extent as
You will feel hungry when you see others eat.
The theory is that if everyone thinks something is boring, they yawn. But this theory can't explain
People who are bored when yawning, unless the person to yawn as an instinctive way, in body language to express the feelings of a thing not happy
Interesting.
Evolutionary theory holds that people yawn to reveal their teeth, a behavior that is passed down from our primitive ancestors. Yawning may be made to someone else
An act of warning. Given that human development has entered a civilized society, it is outdated to give warning to others in a yawning way.

Since people have not yet found the exact reason why yawning is contagious, the problem remains a mystery.
It is also said that yawning is because the body is tired, need to replenish oxygen, so directly to the mouth and nose a large number of inhaled air to obtain oxygen
Gas supplement, as for why see others yawn, oneself also want to yawn, have a kind of saying, it is said that it is human subconscious survival competition
Instinct, because when someone starts yawning in a place, it may be a hint that the air in this place is running short of oxygen, based on survival
Instinct, human subconscious will remind themselves to quickly also suck a large mouth of air, lest when the air is not enough, they can not breathe
Fresh air, because survival is instinct, is a knee-jerk reaction, so even if you see the picture will have a response to "like boys see the newspaper
Chapter Magazine's Cool picture, physiology also has the reaction, the brain is stimulated to hint, the thing false also really —————————————————
——————————————————————————— there is a saying: yawning doesn't just mean that people are tired.
, it has a more general meaning, that is, the changes in the body's condition. Studies show that when people are tired, wake up, or other times when the alert form
When the state changes, it will yawn.
Yawning is characterized by a deep breath of open mouth, while the chin and the muscles of the body are also extended. A lot of animals are going to fight, huh?
Owes, and this action involves the unconscious brain interacting with the body.
It has been thought for years that when the lung's peripheral tissue detects oxygen levels in the lungs, it can cause people to yawn to inhale more air. But I
We now know that the lungs do not necessarily detect the lack of oxygen. Moreover, the fetal lungs in utero may not be ventilated, but the fetus has been able to beat
yawned up. In addition, the movement of breathing and yawning is controlled by different brain regions, and when the oxygen concentration in the side compartment of the hypothalamus is low,
can make people yawn. Another hypothesis is that yawning stems from people's tiredness and boredom. But it could also be wrong, because the side chamber nucleus is also in the penis
The erection of a horn--penile erection is usually not associated with boredom.
In addition to other functions, the hypothalamus nucleus appears to be the "yawning center" of the brain. The side chamber nucleus contains some chemistry that can cause yawning.
Information molecules, including dopamine, glycine, oxytocin, and adrenal cortical hormone. In the case of adrenocortical hormone, it will be in the night and wake up
Before the mass secretion, causing people to yawn and stretching muscles. Yawning also seems to require the production of nitric oxide by a specific nerve cell in the side chamber nucleus. These
When stimulated, the cells of the brainstem and/or hippocampus are activated, causing yawning. Yawning also seems to have an element of reward: if
Endure not yawning, then the whole yawning process is not so satisfactory.
It is correct to say that yawning is contagious. Just seeing, hearing or thinking about yawning can really make people yawn, but we
There is little reason to know; there have been many theories over the years to explain this phenomenon. There is evidence that yawning is an animal in the environment or the body
When conditions change, one way to convey these messages to other animals may be to coordinate animals ' behavior with each other. If that's the case,
, then the act of human yawning is most likely to be an evolutionary relic that has lost its meaning.