Hello, I'm Dr. Wei from the Department of Neurology. Why do people get carsick? It is a neurological problem. Motion sickness is a common phenomenon that affects almost everyone throughout their lives. Motion sickness, also known as "motion sickness", was first described by the Greek physician Hippocrates, who wrote: "Dizziness occurs when sailing on the sea, Vomiting". The term "motion sickness" was first used by Irwin in 1881 to describe a condition caused by repeated oscillatory movements of the body, including discomfort in automobiles, trains, airplanes, elevators, recreational areas (merry-go-rounds, roller coasters, etc.), swings, etc. Similar symptoms can also occur in space. Similar symptoms can occur during space entry and return from space. Motion sickness is usually characterized by dizziness, pallor, epigastric discomfort, vomiting, cold sweats, chest tightness, cold extremities, and panic. However, motion is not an absolute condition for manifesting the disease; perception of motion can also contribute to motion sickness manifestations. For example, despite the lack of physical activity in affected individuals, people may feel symptoms of motion sickness while watching a large sports arena (soccer, basketball game) or participating in a virtual reality game in an amusement park.

Who is susceptible to motion sickness?

I. Probability of onset of different types of motion sickness

Motion sickness is a common phenomenon, and almost everyone experiences motion sickness at least once in their lives. A foreign study has shown thatThe probability of motion sickness requiring medical attention is 4.2% for seasickness, 4% for carsickness, 1% for airsickness, 0.13% for trainsickness, and the incidence of airsickness among novice pilots ranges from 10% to 31%.As these pilots gain experience, the overall incidence decreases over time. Seasickness is one of the most severe forms of motion sickness. One study showed that as many as 25% of passengers experience varying degrees of motion sickness within 2 to 3 days of the boat ride. In extremely adverse conditions, up to 60% of passengers (even experienced staff) may be affected.

II. According to the frequency and severity of symptoms

:: Especially during menstruation, women are more prone to motion sickness than men of the same age. In this regard, pregnant women are particularly susceptible to motion sickness, presumably due to hormonal changes during pregnancy.

● Dizziness is rare in children under two years of age, probably due to the lack of adequate visual input for this age group.

Young babies are usually in a lying down position and are therefore less likely to become motion sick.

●Children between the ages of 6 and 12 are most susceptible to motion sickness, with a peak between the ages of 9 and 10.Susceptibility decreases after puberty.

● Motion sickness occurs relatively infrequently in adults compared to children and is less common after age 50.

:: Although motion sickness can occur in people of all races, racial differences are also evident. Research has shown thatChinese are more likely to get motion sickness than whites.

● Motion sickness can be familial; if both parents have experienced childhood motion sickness, seasickness, etc., their children are much more likely to develop motion sickness.

● Motion sickness is more prevalent in individuals with migraine, otolithiasis, and Meniere's disease.

● Light exposure increases susceptibility to motion sickness. Sleep deprivation also increases susceptibility.

:: Blind people are as susceptible to motion sickness as normal people with closed eyes. On the other hand, dancers, rope jumpers, gymnasts and acrobats have a lower incidence of motion sickness.

● The supine position may also reduce susceptibility to motion sickness.

Motion sickness is most common in children

Motion sickness is less common in acrobats

The point is, how does motion sickness develop?

In the strictest sense of the word.motion sicknessIt is not a pathologic disorder. Rather, it is a response to real or virtual motor stimulinormal neurophysiological response, usually occurs in individuals with an intact vestibular system. In contrast, those patients whose vestibular labyrinth function has been disrupted by disease or surgery usually do not get motion sickness. Motion sickness is usually triggered by low-frequency, vertical, lateral, angular, or rotational movements to which the individual is not attuned, although it can also be triggered by virtual stimulator movements (e.g., playing a complex video game on a large screen, watching a 3D stereoscopic movie, or using a virtual reality headset).

The mechanism by which motion sickness occurs isBrain from differentsensory receptorcaused by conflicting signals received about real body movements or virtual environments. The main receptors in the human body areeyes，Vestibular organs (inner ear labyrinth, semicircular canals, elliptical sac and ball sac)It is the body's receptor for its own state of motion and the position of the head in space.The inner ear, which helps control the sense of balance, the semicircular canals sense the stimulus of rotational motion (clinically otolithic vertigo is a problem with the semicircular canals), and the elliptic and ball sacs are sensitive to gravity and tell you whether to stand up or lay down. Let's say you're driving around in a car that goes straight ahead, turns, backs up, goes uphill or downhill, and your eyes sense external signals, the labyrinth of the inner ear senses signals, the semicircular canals, the elliptical sac, and the globe sac still sense signals, theBut all these signals can be different, the brain's inability to receive all of these different signals at the same time triggers a neurophysiological response, which is why you end up with symptoms like dizziness, nausea and vomiting. So far.Sensory conflict and nerve mismatch theories are the most commonly accepted theories of motion sickness。

vestibular organ

The brain usually integrates all the external signals it receives before they make sense. But sometimes your brain receives conflicting signals, for example, in a flying airplane you feel like you're moving, but your eyes tell your brain you don't seem to be going anywhere. And vice versa, after a long sea voyage, you can be standing motionless on land and still feel like you're moving.

Motion sickness can also be caused by the "spillover" or "radiation" of an overexcited equilibrium center to the vomiting center. Motion sickness may be psychologically related. Some people experience motion sickness even before riding in a car or boarding a ship, and some people experience it effectively with a placebo.

The severity and duration of motion sickness depends on the degree of conflicting motor-sensitive input signals and the individual's ability to adapt to the abnormal environment. Adaptation is considered to occur if the susceptible individual learns to accept such conflicting sensory information without developing symptoms of motion sickness.

What are the symptoms of motion sickness?

:: Motion sickness can come on very quickly, most often out ofsweating all overI feel like I want tovomiting

● Dizziness

:: Pallor

:: Increased salivation

:: Upper abdominal discomfort

:: Loss of appetite

:: Cold extremities

:: Chest tightness and panic attacks

:: Some people may have headaches, feel tired, or have shallow breaths

How to prevent and relieve motion sickness?

For most people, motion sickness symptoms usually don't last long. Once you get used to them, whether it's the movement of a car or the rocking of a boat, they usually go away. However, if motion sickness doesn't go away on its own, there are things you can do toPrevention and mitigation measures：

:: Susceptible persons should avoid overeating before traveling, eat a light diet, stay well hydrated and avoid alcohol.

Relax. Find something to focus on, whether it's taking a deep breath or counting down from 100. Closing your eyes also helps.

:: Look at a stable object. If you are in a car, look out through the windshield.

:: Do not smoke. Open windows for fresh air (except when flying).

:: A hot and stuffy atmosphere during the journey may make people prone to motion sickness and should be avoided.

● Reading or viewing video screens in a mobile environment should be avoided.

:: Sitting in the front seat is recommended

● Ginger: You can put a few slices of ginger in your mouth, which can also be effective in relieving motion sickness.

● Peppermint candies: The scent of peppermint calms the body.

● Windex and cool oil applied to the bilateral temple area can be effective.

:: Acupuncture and acupressure: there are reports that stimulating a point under the wrist can help relieve nausea.

● Sunglasses may reduce visual input and may be beneficial.

essential balm for stopping dizziness

Caution:In cases where motor stimulation is unavoidable and motion sickness symptoms are evident, a gradual exposure approach can be used to desensitize the body, gradually increasing the intensity of the stimulus over multiple movements; continued exposure to motor stimulation leads to habituation. The changes brought about by the habituation process are retained in the central nervous system. Habituation/desensitization is an effective long-term response.This habituation is highly adaptive to specific stimuli, and about 50% of people may adapt successfully.

If the above methods are not effective and you are still plagued by motion sickness, it is advisable to try medications:

●Diphenhydramine (antihistamine): This medicine used for allergy relief also helps with motion sickness. The first dose should be taken one hour before traveling. Take one dose every four to six hours.

:: Scopolamine (antimuscarinic): stronger and more transient. It is used clinically for analgesia, cough relief, asthma, and is effective in motion sickness.

:: Isoprinosine (antihistamine): can be used as an antiemetic, antimotion sickness, and sedative-hypnotic.

Note: These have side effects, including drowsiness and dry mouth.

When do I need to see a doctor?

Motion sickness usually goes away after the trip is over. However, if you remain dizzy, have a headache, continue to vomit with hearing loss or chest pain, and if medication is involved, seek medical attention.

Author Words:Hello everyone, this is Dr. Wei. If this article is helpful, please help● Click "Follow" or "Like".If your family and friends also need this knowledge, please:: ForwardingFor those who need it, your support is the greatest motivation for me to create, thank you!

参考资料：Alexander KC，etal.Motion sickness: an overview.Drugs in Context，2019，8：DOI: 10.7573/dic.2019-9-41

Many people suffer from motion sickness, airsickness and altitude sickness, and they talk about "motion sickness" and suffer a lot from it.

Whatever the "dizziness", the most common manifestations areNausea with desire to vomit or vomiting, dizziness, blurred vision, ringing in the earsThe serious ones will bePallor, sweating, cyanosis of lips, ataxia, weakness of both lower extremitiesetc.

These are collectively known in medicine as"Vertigo."

(Web image, for reference only)

Vertigo refers to a spinning, wobbling sensation in oneself or the environment and is anmotor hallucination。

And there are about hundreds of diseases that cause vertigo.70% of them are peripheral vertigo.While most peripheral vertigo is inextricably linked to our ears.

Because the ear not only hears sound, it also controls balance.

Deep in the ear is avestibular systemIt has two so-called "brothers", namely.visual system和Limb Muscle Coordination Systemthat work together to maintain the body's balance.

The majority of vertigo symptoms are the result of the "boss", the vestibular system of the inner ear, being "pissed off".

(Web image, for reference only)

When the car, train start, acceleration and deceleration, braking, aircraft lifting, shaking, bumps, etc. These stimuli so that the vestibular hair cells produce deformation discharge, transmitted to the brain center of the "Commander-in-Chief" and perception.

These vestibular electrical signals are generated and transmitted within certain limits and time without adverse reactions, but once the body's tolerance is exceeded, discomfort can occur.

Some friends may wonder why I am dizzy even when I see heights. This is because the "second" visual system and "third" limb muscle system "fight".

When you're high up, looking down is a blur, the view shrinks dramatically, and everything becomes out of reach, very different from what you're normally used to seeing.

At this time, the visual information is greatly reduced, and the eyes are unable to find the physical object in the horizontal position for motion reference, the visual range is enlarged many times, and the information transmitted to the center of the brain is not the same as the usual information, and it is impossible to make a judgment for a while.

Difficulty in giving action commands to the muscles of the limbs, so movements cannot be coordinated, the body loses balance, the brain experiences vertigo, and the legs have difficulty taking steps.

(Web image, for reference only)

Sure.Vertigo can also be prevented in advanceThe following is a professional guide for those who are suffering from "vertigo". The following are professional guidelines for people with "vertigo":

People who suffer from motion sickness take a single dose of the drug 1-2 hours before departure time, such as benadryl tablets (multiply dizziness) and scopolamine, may reduce symptoms or prevent onset.

Also.Enhanced vestibular rehabilitation exercises.

In fact, the human vestibular system has a very powerful compensatory function, and even if you get a very severe case of vertigo, theIt can get better with rehabilitation exercises.

unlessSitting around all day.and eyes only on computers and cell phones.The body's homeostatic function declines。

If the stimulus activity that initially triggered the vertigo is repeated, the brain begins to adjust to it, and the body's balance disorder gradually improves to an adapted state, so theMotion sickness, airsickness, and altitude sickness can all be overcome.

Hunan Medical Chat Contributing Author: Yang Dan, Department of Otorhinolaryngology, Changsha Hospital of Traditional Chinese Medicine (Changsha No. 8 Hospital)

The Spring Festival is just around the corner, and for some people who suffer from motion sickness, traveling home by car is undoubtedly a difficult journey. Eating plums, smelling orange peel, applying anemone, eating seasickness medicine ...... which actually works better? The reporter interviewed Tian Guangyong, director of the Department of Otorhinolaryngology at the Third Affiliated Hospital of Southern Medical University.

FILE PHOTO

• Motion sickness is caused by the vestibular system

Tian Guangyong told reporters that motion sickness itself is caused by the vestibular system, some people are more adaptable is not easy to motion sickness, some people are relatively poor is easy to motion sickness. Why sit in front of the better than sitting in other positions, there are two main reasons, one is the front of the visual single, focused attention; two is a small bumps. And take the bus than take the train and car more prone to motion sickness, the reason, Tian Guangyong think there are the following points:

1. Speed: the train is uniform and smooth, not bumpy, so it is not easy to get seasick, while the bus often brakes, a stop and go is more likely to cause motion sickness;

2. Interior environment: poor air circulation in closed buses;

3. Attention: some people do not get dizzy when driving, because at this time they focus on looking at the road, plus the field of vision is also good; while sitting in the car is prone to motion sickness, is caused by the vestibular function.

• Mild motion sickness has little effect on health

Tian Guangyong believes that mild motion sickness has little effect on health. In daily life, due to motion sickness and vomit too much, there is bile water spit out, the taste is relatively foul, and there into the black material, it may be gastritis membrane damage. In this regard, he suggested that at this time, you can take some drugs to avoid aggravating the damage.

If it is only occasional motion sickness, Tian Guangyong believes that this situation does not need to worry about, may be related to its own mood and the day's diet.

• Ways to overcome motion sickness

Tian Guangyong introduction, usually more severe motion sickness dizzy people can consider eating motion sickness medicine, such as Benadryl, vertigo stop and other effects are similar, adults and children can eat.

Ordinary motion sickness does not need treatment, can be trained to make the vestibular, balance system slowly adapt. He suggests that, in ordinary life, you can ride more often, often ride will slowly accept to adapt, as pilots spinning need to be adapted to long-term training to reduce the feeling of dizziness.

At the same time, he also said that if you are afraid of motion sickness will occur, then you can bring some plums, Chenpi, ginger candy in the car to eat, or sniffing some fruit peels, in order to prevent motion sickness. Tian Guangyong pointed out that, for the use of orange peel ginger onion and so on in the car for odor absorption, is mainly a distraction.

In addition, he suggests that you should not eat too much or too little before riding in the car, as riding in the car when you are hungry is more likely to cause dizziness and vomiting.

Motion sickness, a common phenomenon for many people, is also known medically as motion sickness, which is now widely recognized as being related to the vestibule, the body's inner ear balance organ.

The vestibule is located in the inner ear and is considered an important organ in maintaining the body's balance function. Over-sensitization or under-development of the vestibular organ can cause dysfunction of the autonomic nervous system, which can lead to motion sickness. That is to say, many people's motion sickness is caused by over-sensitivity of the vestibular organs. When people are riding in a car, due to the bumpy ride, the balance of the vestibular organs will be disrupted, and then the friends who are sensitive to the vestibular organs will suffer from motion sickness, which is a common feature for most people.

But we will also find individual phenomenon, the car is no longer good balance is still much better than the bike balance, but many people bike does not get carsick, while the comfortable balance of the car is better, but cars get carsick. How can this be explained? The only explanation is that many people get carsick not because of vestibular balance problems. This is seen as a visual and proprioceptive misalignment. The vestibular system of the body works with inertia, for example, when braking sharply, the vestibule immediately perceives and feeds back to the brain the message, "I am braking sharply," and at this time, the body at this time for the brain to feed back the message does not detect the braking sharply, so at this time, the brain organizes the information and concludes that: I have not been active, why would I be sick to my stomach? Maybe the body is malfunctioning. So mobilize the body's functions to vomit and other stress to protect themselves. In this process, the visual participation is exacerbated by the process, which is why looking at the phone in the car will aggravate the cause of motion sickness.

And why don't you get motion sickness on a bicycle? Because in the movement of the bicycle, the whole function of the body to mobilize the brain perception is that you are in motion, the body's feedback to the brain with the vestibular feedback to the brain information consistency, the chance of motion sickness is much smaller.

So in response to the above, how can you alleviate motion sickness?1. For those with vestibular sensitivities, the only way to do this may be the need toExercise your vestibular sensitivity toleranceThe following are some of the most common problems that can be solved with the use of the vestibular system Vestibular tolerance can be increased by rotating in place, repeated bumps in the traveling car, and more car rides.2,Close your eyes and look at your cell phone less while driving.3. Stimulates sympathetic excitation, thereby inhibiting the parasympathetic nerves. Reduces the signals transmitted from the vestibule of the body to the brain via the nerves. For exampleWindex, ginger slicesetc.4,front row ventilation5,Motion sickness pills.People who often get carsick are advised to prepare and carry with them a suitable motion sickness medicine and take it half an hour before boarding the bus.

Feel free to leave a comment in the comments section or add a follow.

Thanks for the invite!

The feeling of motion sickness is very painful, I was young, I had a motion sickness experience, that experience is estimated to have no motion sickness is very difficult to feel it! First of all is vomiting, vomiting powerful, can spit out bile; in is a weak sweat, floating, diarrhea, many cases of leg and foot weakness, the whole body soft, especially the car stop and go, feel that their own life will be gone, more difficult than the sick, is to the station, they feel numb, no strength, other people see me pale, people with a little worried, and the people who have a little worried.Motion sickness pills don't work for me.

Why do you get carsick?professionally, the principle of it is clearer. We have a balancing organ in our inner ear thatAlso known as the vestibular organ of the inner ear, itIt is the main organ that manages the balance, especially sensitive to the sense of movement. When riding in a car or boat, there will be vibration and rocking stimulation, our human inner ear vestibule can not adapt well and regulate the balance of the organism, the organism will produce a kind of its own active regulation measures, nerve dysfunction, causing sympathetic excitation, vertigo, vomiting, pallor, numbness, weakness and other symptoms.

The problem of motion sickness is related to genetics, so we see a lot of motion sickness people, many of their family have motion sickness, I am the same, siblings and parents have motion sickness, my children also have motion sickness, so in the selection of pilots, there is this vestibular function test, motion sickness exists in the individual variability. In is also a lot of triggers, such as poor sleep, overwork and other situations prone to motion sickness phenomenon, it is still affected by psychological factors, many people in the absence of a car before the psychological fear, motion sickness people have an idea, would rather walk, do not want to take the car, right. In is to drive without motion sickness, so again laborious, all hope that they drive.

I used to be very dizzy, can not sit in the car, tried a lot of methods, such as mouth with ginger, ear paste motion sickness stickers, navel paste motion sickness stickers, mouth arch a smoke, etc., a variety of ways can not inhibit motion sickness, motion sickness medicine has no effect on me. Just joined the work, go to the field on business trips, when sitting in the leadership car, that era, few and travel opportunities, so very happy, forget about motion sickness, a sit is more than twenty days, that is, that time motion sickness problem is good. By now, I don't get carsick, but I still get dizzy when I play with my cell phone or read a book in the car!
(The vestibule connects the three semicircular canals, which are the organs through which we sense movement in different directions.)

I'm super car sick,. I just rode 💯 kilometers in a car without using motion sickness pills and I'm still a little dizzy. I recommend you to use 1 glucose (oral liquid in glass bottle, 5 in a box) plus 2 glucophage (oral liquid in glass bottle). Drink it half an hour before you get on the bus. It works like a charm. I've been using it for over 10 years. You can't get them at many drugstores anymore.

First of all, I think the motion sickness of the people around me has something to do with the driving skills of the master driver.

If the master driver drives smoothly, prepares early for slowing down at intersections or slowing down at stoplights, and accelerates slowly at the start, we don't have much of a motion sickness reaction.If the driver slams on the brakes and slams on the gas, then the people in the car is definitely not good, because of inertia, the passengers can not be synchronized with the speed of the car all the time, always back and forth back and forth, it is very difficult.

Secondly, from a physical point of view, the front windshield is different from the glass on both sides of the body, and the driver's visual perception is different from ours. While the driver has not yet felt the vertigo, the passengers have already reacted with discomfort.The unboosted glass installed on the car, especiallywindshield，There is a curvature deformation at the edge where they come into contact with the body of the car, and it is this curvature that can distort the view outside the car as it passes through the curvature, thus affecting the vision of the occupants of the car.The scene in the center moves at normal speed, the scene at the edges moves fast.That's why people who put their eyes on the windows on both sides of the car are more likely to be dazzled.

The little woman is 28 years old, has been seasick for 20 years, when I was in elementary school for the first time to go to Jiaozuo by car vomit that called a miserable, especially when the driver waiting for the traffic lights, a stop and go, the stomach turned over, some people say that seasickness is because of the smell of gasoline, but I love to smell gasoline, I seem to be the cause of the ear, the ear heard a special sound waves lead to the cause of it, but my mother is also seasick, and she said that it is not smelled Gasoline.

So, I currently think the main causes of motion sickness are 1. not being able to smell gasoline, and 2. the ears not being able to handle certain sound waves.

Relief methods, said a few I have used the effect is good, 1, sitting in the car when lying on the lap of a companion, 2. with a mask 3. ear plug cotton, 4. sitting in the seat when trying not to lean back, the body leaning forward, 5, if the car before eating greasy food do not eat oranges, 6, more car 😉.

I'm much better now because I've been working at Foxconn for a while now, and I have to take the car every day to and from work, and I went from lying on my coworker's lap in the beginning to eventually, being able to eat meat loaf in the car 😊😊.

I have a deep understanding of motion sickness ah, remembering the past a bus must be motion sickness must vomit scene, the mood is simply inexpressible ah ~

Why some people get carsick, some people do not get carsick it, I looked up some information, research, the following to share with you ~ in fact, some people not only get carsick, but also airsickness, seasickness le ~

From the medical point of view, this series of "dizzy movements" are collectively called motion sickness, once this symptom, the whole person is very difficult to each other, nausea, dizziness and other symptoms. This has a certain relationship with the individual physique of people, in our poor quality of sleep, overworked, or too hungry and too full when it is easy to happen.

In addition to this, it has a lot to do with the human body's vestibular balance organ, a balance system. The vestibule can sense the changes in the head position and body position of the human body, and can adjust the posture of the human body at any time to achieve body balance. Vestibular is located in the inner ear, when we ride the sudden start of transportation, bumps run, emergency braking, our body is in the "swing" state, bumps make the vestibular organs to feel the left and right swaying, and constantly send out mixed signals to the brain, the inner ear adjustment function can not keep up with, will feel dizzy.

There is another reason for motion sickness caused by external stimuli. For example, I can't stand the smell of gasoline, and I get dizzy and nauseous when I smell it.

We can also prevent motion sickness by doing the following:

1, the car must eat some food, but do not eat too full, six or seven minutes full can be,,, the middle of the road can be moderate to add some energy;

2, now on the market there are many to prevent motion sickness motion sickness tablets or motion sickness stickers, can try;

3, the appropriate window ventilation, to maintain air circulation in the car, it is best to rest with eyes closed. One of my favorite things to do in the car is to get on the car to sleep, sleep almost, it should be to the station to ~!

4, usually also need to strengthen their own exercise, to ensure the quality of sleep.

I remember when I was in school, there was a roommate who was worried every time he went on vacation, not because he didn't want to go home, but mainly because the road was too aggravating, and he had to take a long bus ride home, and motion sickness was the most unbearable thing for him.

Motion sickness, also known as motion sickness, is often characterized by dizziness, nausea, vomiting and even shock after being hit by bumps, acceleration or deceleration, or rocking. It varies greatly from person to person, and the reason for this is related to the sensitivity of the vestibular organ in our inner ear.

The vestibular organ of the inner ear (including the three pairs of semicircular canals, the elliptic sac and the globe sac) plays a major role in our body in sensing equilibrium. Any factor that causes a change in the position of the body can cause the vestibular nerve to generate nerve impulses, which are then transmitted to the central nervous system, which maintains the body's equilibrium by issuing commands to control the stretching and contracting of the muscles.

And each person's vestibular organs have different sensitivities to receiving external stimuli, for example, the same bump, some people produce nerve impulses much stronger than others, when the intensity and duration of these nerve impulses are above a threshold, which will appear in the above performance.

For this kind of vestibular nerve is too sensitive friends, you can take antihistamine or anticholinergic drugs, such as Tea Phenhydramine (Ride Dizziness Ning) 1-2 hours before the long-distance car ride, can reduce the corresponding symptoms.