First, vision and hearing are not consistent.
The eyes can observe the environment and tell us whether we are still or moving. The vestibular organ of the ear is like a delicate gyroscope, which can assess the speed and angular momentum of the body, whether it is moving forward or backward, whether it is turning flat or turning over. Both transmit signals to the brain for evaluation and integration. Under normal circumstances, most people's brain will only come to a conclusion, guiding the whole body muscles to adjust. " Oh, we are playing football now, legs, you run & hellip; & hellip“
Some people are not. When they sit in the car, the eyes report the environment inside the car to the brain, which makes the brain think "it's still around", but the vestibule can feel the acceleration and turning of the car, and tell the brain "no, we're moving now". Because of the contradiction between the left and the right, if the brain can't integrate information for a while, it may be estimated according to the worst situation - "bad, are we suffering from food poisoning? Poisoning can produce a sense of rotation without moving the body. In order to avoid the worst, the brain has to give the gastrointestinal tract an order, "to make me wriggle, we must spit out the food in front of us". At the same time, in order to protect the important internal organs, the blood vessels on the surface of the body will contract and drive the blood to the inside of the body. Women are more special than men. They are responsible for childbearing. The fetus is more sensitive to toxic substances. This is what causes sickness, vomiting, even pale complexion and cold body condition. The incidence rate of carsickness is even higher.
In the second case, reality is inconsistent with experience.
This usually happens to astronauts. Before the astronauts took part in the flight, they were almost grown up on the ground. The brain can only generate a set of methodology according to the ground environment. When participating in the mission, the experience of ground formation is inconsistent with the space microgravity environment, which may cause motion sickness.
The discomfort caused by playing with mobile phones by car is similar to this. After driving again and again, the brain can't easily remember that "in the car, the eyes feel still and the vestibule reports the movement is normal". The rapidly changing contents on the mobile phone start to tell the brain that "we are moving now". Moreover, the mobile phone can't fill the whole field of vision. With the slight vibration of the vehicle, the highlighted mobile phone screen and the surrounding dark environment go back and forth Eye irritation can also cause a sense of movement. This feeling breaks the past experience of the brain, so it has to make the worst estimate & hellip; hellip;
Scholars call it digital motion sickness. In addition to mobile phones, movies, video games and virtual reality devices may cause this symptom.
Next, let's talk about prevention.
Knowing the mechanism of carsickness, there will be a preventive plan.
First and foremost, adaptation. Before the astronauts carry on the flight mission, they must carry on the massive training, in order to reduce the attack of motion sickness. We can't easily get the equipment they use. However, research shows that daily physical exercise can also increase people's adaptation to various environments and reduce the incidence of motion sickness.
Secondly, in addition to reducing the brightness of the mobile phone, some mobile phones can adjust the content display mode. By weakening the dynamic effect, we may reduce the difference between the mobile content and the surrounding environment, and then reduce the discomfort. Of course, the better plan is not to play mobile phones, you can listen to songs and look out of the window. Studies have shown that music can reduce the incidence of motion sickness. Reduce the dynamic effect (source: Apple support) once again, in life, sleeping well and keeping relaxed can greatly reduce the probability of motion sickness. The diet is a little more complicated. Before taking the bus, eating less salt, eating less high calorie food and eating more fruits and vegetables may reduce discomfort.
Finally, in case that the above points have been achieved, or how to deal with carsickness?
There are three kinds of drugs commonly used in clinic: theobenhemine, promethazine and scopolamine.
The first is over-the-counter drugs, and the last two are prescription drugs, which must be used under the guidance of doctors. If you are not willing to take medicine, recent research shows that taking a little ginger powder or pressing Neiguan acupoint can also reduce the discomfort caused by carsickness. Although the conclusion is not accurate enough, these two methods do not cost money and have no side effects. You may as well try them.
In a word, carsickness is very common, not only we have, but also pilots, astronauts and even military uncles in amphibious equipment. Don't be burdened with ideas - as long as we respect the rules and deal with them carefully, our brains will gradually adapt to new situations.