Naked Science Forum

On the Lighter Side => That CAN'T be true! => Topic started by: sgroclkc on 12/10/2006 04:07:09

Title: What causes motion sickness?
Post by: sgroclkc on 12/10/2006 04:07:09
On the one hand motion sickness experts agreed on the way in the  carsickness, seasickness and airsickness gets sick or motion sickness is caused by motion or rotation or visual stimuli http://www.postgradmed.com/issues/1999/10_01_99/gahlinger.htm (http://www.postgradmed.com/issues/1999/10_01_99/gahlinger.htm), but on the other hand  motion sickness experts agreed on the way in the really cause of the motion sickness is not motion, spinning,the precise etiology of motion remains a mystery.http://www.sciencemaster.com/jump/space/motion.php (http://www.sciencemaster.com/jump/space/motion.php) and http://nasaexplores.com/show2_articlea.php?id=01-040 (http://nasaexplores.com/show2_articlea.php?id=01-040)   Because this would not explain the person who are susceptible to carsickness do not suffer carsickness ,when the person rides  train,truck, motorcycle and tractor. Because, of the infrasonic sound or the noise of low frequency is extremely small. And spinning around motion sickness differs from carsickness, seasickness and airsickness in a symptoms.For instance, carsickness, seasickness and airsickness all has a symptom of drowsiness,spinning around motion sickness has not a symptom of drowsiness,spinning around  motion sickness has a symptom of spinning around feeling ,carsickness, seasickness and airsickness all has not a symptom of spinning around feeling . This Self-Contradictory Statements is really unprecedented in human scientific history But in reality all these carsickness, seasickness and airsickness gets sick or motion sickness is caused by infrasonic sound or the noise of low frequency.  Of instance, (1) this would explain the person who are susceptible to carsickness do not suffer carsickness ,when the person rides  train,truck, motorcycle and tractor. Because, of the infrasonic sound or the noise of low frequency is extremely small.  (2)  There was a highest incidence of seasickness in the speedboat,the speedboat  noise is biggest of among all sorts of ships. Proved that seasickness is caused by noise (3)  There was a highest incidence of airsickness in the Jet plane,the Jet plane noise is biggest of among all sorts of Planes. Proved that airsickness is caused by noise (4) Space motion sickness is caused by the infrasonic or the noise of low frequency,too.Of instance,the power of the engine of Mercury and Gemini is small that the infrasonic or noise of Mercury and Gemini is small.So,Mercury and Gemini space flight astronauts did not experience space motion sickness.astronauts of Mercury and Gemini floating free in space,too. http://www.sciencemaster.com/jump/space/motion.php (http://www.sciencemaster.com/jump/space/motion.php)
 But it was most important to scientists had confirmed motion sickness is caused by infrasonic sound or the noise of low frequency.
For example,Surf pounds the shore, producing shocks of 16 cycles per second, just short of the true infrasound range. Ocean waves, which pound the atmosphere across huge ocean areas, produce an acoustic energy with a mean pitch of 16 cycles per second. The phenomenon of the "barisal guns, fog guns, lake guns" form a well documented bibliography of anomalous acoustic phenomena. These "booming" anomalous tonal phenomena are not isolated to one area or nation. Every nation has accounts of these sea-related mystery sounds. Some regions call them "bay detonations", since they come as abruptly explosive intonations from certain bay areas.
Some of these tones manifest their shocking tones at haphazard intervals. But there are those water-related booms, which are periodic, residents near these sites being accustomed to their mysterious occurrence. The strange "explosive" sounds come at certain times of the day, at certain times of the month, and at certain times of the year. There are certain other related anomalous natural tones, which ring, hoot, and buzz. Some have been likened to organ tones, tuba blasts, and the deep intonings of very large bells. Bay sizes, wave sizes, and geologic compositions of bays and shores have been woven into complex mechanistic attempts at explaining how these mystery sounds are being generated in certain environments.
The detonation may be caused by a sudden "slapping" of bay water by a singular wave having the "right" breadth and momentum, matching the natural resonant pitch of a bay. The underlying bay rock matrix may resound in the manner of a bell, gong, or cymbal. The geological composition of the bay plays the greater part of the effect, sudden winds or water surges knocking the natural "sounding board". These natural bay tones have great infrasonic content.
The infrasonic outputs of the mystery tones are significant. Each of these phenomena produces a range of very low pitch tones. These booming sounds have rattled windows and rocked some small towns. Animals are startled by their inaudible precursors, and humans are often dizzied after their manifestation for hours. In several areas, people are hospitalized by the "boom" related illnesses.
Waterfalls are notorious generators of infrasound. Numerous susceptible visitors at Niagara experience a peculiar nausea, which is not associated with the normal fear of heights. Thundering cataracts produce strong infrasonic shocks to which mile exposure stimulates the common malady. Lake ice and glacial ice produce deep booming sounds which ring for hours, behaving as large tympanic surfaces. The thunderous sounds associated with these occurrences produces infrasound of pitch related to ice surface mass, breadth, and length alone. Antarctic research experienced nausea in relation to ice related sounds.
Tidal waves and other sudden variations of water surfaces produce large magnitude "seiche" waves. These have been sighted by ocean going ships, where oceanic surfaces have drastically changed elevation in an incredibly short time. Ships "drop" into such huge ocean troughs and rise again after the wave passes. In dropping, some have crashed to the very rock bottom of their bays, only to be lifted in pieces when the wave resurged. Film footage of the great and horrid Alaskan Earthquake (1964) reveals this devastating sea "drop-out".
Upon such lethal seiche tides, even in the fortunate absence of earthquakes, comes nausea and other coastal related illnesses. Large intensity infrasonic sea shocks have their powerful effect on the overlying atmosphere of their regions. These infrasonic shock waves travel for long distances. Certain bays are known for the high incidence of such illnesses, the result of resonant bay water "heavings" which occur daily. Their sickening effects are seemingly "stored up" in physiology, lasting for hours. While these phenomena proceed from deep in the heart of earth, and on its surface, there are phenomena, which generate infrasonic sources ... from space.
http://www.hbci.com/~wenonah/history/gavreau.htm (http://www.hbci.com/~wenonah/history/gavreau.htm)
Low intensity infrasound from autocar engines has been well recognised to induce car sickness (30)(98) - a mild serotonergic-vestibular disturbance involving nausea, giddiness, headache.http://www.markpurdey.com/science_the_origins_of_bse_7.htm (http://www.markpurdey.com/science_the_origins_of_bse_7.htm)
 
Moreover this theory about motion sickness is caused by all kinds of acceleration of different directions and size or Coriolis acceleration (,reference: http://www.remarkablemedicine.com/Clinical/clinicaluses/otherdisorders/motion.html),Overthrow (http://www.remarkablemedicine.com/Clinical/clinicaluses/otherdisorders/motion.html),Overthrow) Newtonís second law of motion.Because,Newtonís second law of motion says anly by calculate a man or an object is influenced by size of the resultant force can know a man or an object is influenced by the size of the in reality acceleration.of instance, the astronaut is affected by the Gravitation acceleration as well as the centrifugal force acceleration in space,But the in reality is affected by acceleration equal for zero.
So,this idea not only was a fraud but it was maximum jest in human scientific history.
 Motion sickness experts knew this, they kept quiet up to now
  And they knew rendered violently nauseous noise of an airplane,they calling this motion sickness a ďconditioned reflex,"Their statement rather absurd.
Title: Re: Motion sickness theory is a swindle
Post by: Soul Surfer on 12/10/2006 09:19:45
As the human senses of hearing and motion detection both use the inner ear and similar sensors and low frequency motions will produce low frequency sounds it is not supprising that low frequency sound and motion sickness are linked.

Learn, create, test and tell
evolution rules in all things
God says so!
Title: Re: Motion sickness theory is a swindle
Post by: sgroclkc on 02/11/2006 00:50:57
Moreover this theory about motion sickness caused by all kinds of acceleration of different directions and size or Coriolis acceleration (,reference: http://www.remarkablemedicine.com/Clinical/clinicaluses/otherdisorders/motion.html),Overthrow Newtonís second law of motion.Because,Newtonís second law of motion says anly by calculate a man or an object is influenced by size of the resultant force can know a man or an object is influenced by the size of the in reality acceleration.of instance, the astronaut is affected by the Gravitation acceleration as well as the centrifugal force acceleration in space,But the in reality affected by acceleration equal for zero.
So,this idea not only was a fraud but it was maximum jest in human scientific history.
Title: Re: Motion sickness theory is a swindle
Post by: Soul Surfer on 03/11/2006 11:01:13
English may not be your first language but I'm afraid that your last post is not understandable and appears to be unecessarily dogmatic.
Title: Re: Motion sickness theory is a swindle
Post by: sgroclkc on 14/11/2006 00:59:22
yes,
I am a Chinese,Ixcuse me Do you understand what I write?
Title: Re: Motion sickness theory is a swindle
Post by: sgroclkc on 14/12/2006 01:58:02
They knew rendered violently nauseous noise of an airplane,they calling this a "conditioned reflex,"Their statement rather absurd.
Title: Re: Motion sickness theory is a swindle
Post by: Ophiolite on 18/12/2006 16:36:12
I do not normally reject hypotheses on the basis of personal experience, but in this case I shall make an exception.

As a child and teenager I routinely travelled by ferry from my island home to the mainland. When the weather was calm, sitting in the ferry, subject to the noise of its engines, I would reach the other side feeling perfectly well.
When the weather was rough, sitting in the same location, subject to the same noise, I would reach the other side feeling decidely sea sick.

As a child and an adult, sitting in a car, carefully looking ahead and anticipating the movements of the car, I could travel hundreds of miles with no ill effects. In the same car, attempting to read a book, or a map, I would be car sick within two minutes.

Travel sickness is related to a mismatch between what our balance organs tell us is happening and what our eyes tell us is happening. Before we developed forms of transport such a mismatch indicated that we were hallucinating. The probable cause was poisoned foodstuff. The solution was to get rid of the poison by vomiting. That is the simple explanation for motion sickness and it is not a swindle.
Title: Re: Motion sickness theory is a swindle
Post by: sgroclkc on 24/12/2006 01:33:36
A rocking boat or a bumpy airplane do lead to the motion sickness is coincidence,the greater a rocking boat or a bumpy airplane ,the greater the infrasonic of boat or airplane
A symptom of rotation motion sickness is different distinct from carsickness, seasickness and airsickness,so it is certain rotation motion sicknesshave nothing to do with carsickness, seasickness and airsickness
A symptom of rotation motion sickness is different distinct from carsickness, seasickness and airsickness,so it is certain rotation motion sickness have nothing to do with carsickness, seasickness and airsickness
For instance, carsickness, seasickness and airsickness all has a symptom of drowsiness,rotation motion sickness has not a symptom of drowsiness,rotation motion sickness has a symptom of rotation feeling ,carsickness, seasickness and airsickness all has not a symptom of rotation feeling .

Title: Re: Motion sickness theory is a swindle
Post by: Karen W. on 24/12/2006 02:37:26
SAY WHAT????
Title: Re: Motion sickness theory is a swindle
Post by: rosy on 25/12/2006 01:21:55
sgroclkc, I'm afraid I'm having trouble with your english but I understand you to be suggesting that motion sickness is caused not by motion but by infrasonic "noise" from the engine. If this is indeed your suggestion, how do you account for the fact that sea sickness dates back to long before the invention of engines?
Title: Re: Motion sickness theory is a swindle
Post by: GBSB on 26/12/2006 00:21:15
Space sickness is caused by weightlessness (absence of gravity).

Carsickness, seasickness and airsickness are caused by altered gravity.

Travelling on the ship on the rough sea we are constantly exposed to the some extent of lift off (in time when wave lifting ship) and to the some extent of free fall (for the time when wave causing that ship going down)

In moment of lift off, the human body is exposed to gravity force bigger than 1G and in moment of free fall is exposed to strength of gravity forces less than 1G.
 
Frequency of the change of the strength of the gravity determines extent of sickness (simplify theory).

Travelling on the ship on the rough sea is like travelling on moving platform (ship constantly going up and down and swaying from one side to another).
 
Travelling on the ship on quiet sea is like standing, seating or walking on the solid ground.
 
Body is exposed by altered gravity on similar way by travelling with the car and by airplane.

Train sickness it is unknown, because train travel on more straight direction and seldom steering up the hill and down a hill.
Only in the time of speeding, usually when train leaving station and in the time of slowing usually when train arriving in station passengers are exposed to small extent of altered gravity.

It shows that motion does not cause sea, car or airplane sickness but frequency of the alteration of the gravity force on the humanís body.

"Motion sickness" is not appropriate name to describe health condition caused by altered gravity. Appropriate name will be ďaltered gravity sicknessĒ.
Understandings importance of the pull of gravity for humans and any living organism will enable to understand prevent and cure many nowadays illnesses and diseases.

Luka Tunjic
 http://www.freewebs.com/lukatunjic/

Title: Re: Motion sickness theory is a swindle
Post by: sgroclkc on 26/12/2006 01:51:36
Infrasonic is caused by closed automobile compartment or cabin in vibration.For instance,the truck, motorcycle and tractor has not closed compartment,infrasonic is very little that it can not carsickness.
Title: Re: Motion sickness theory is a swindle
Post by: rosy on 02/01/2007 14:21:10
GBSB:
Quote
Train sickness it is unknown, because train travel on more straight direction and seldom steering up the hill and down a hill.
Not true... my mother gets sick on trains if she's facing away from the direction of travel. If she's facing forward and can see out of the window it's fine.
Title: Re: Motion sickness theory is a swindle
Post by: sgroclkc on 04/01/2007 02:32:56
 Space motion sickness is caused by the infrasonic or the noise of low frequency,too.Of instance,the power of the engine of Mercury and Gemini is small that the infrasonic or noise of Mercury and Gemini is small.So,Mercury and Gemini space flight astronauts did not experience space motion sickness.
Title: Motion sickness theory is a swindle
Post by: GBSB on 10/01/2007 23:55:53
Quote
Rosy
Quote
GBSB:
Train sickness it is unknown, because train travel on more straight direction and seldom steering up the hill and down a hill.
Not true... my mother gets sick on trains if she's facing away from the direction of travel. If she's facing forward and can see out of the window it's fine.

You are right Rosy. I shouldnít write that train sickness is unknown but less common.
 
I think that train sickness is less common than space, see, and airplane and car sickness.

Train sickness in most case is not caused by altered gravity but by (uncommon or unusual) visual stimulation.
I think that air and see sickness is caused by altered gravity and car sickness is caused by altered gravity and uncommon visual stimulation combine (watching through side window).
What is interesting to me is that see, airplane, car and train sickness affects mainly (if not only) passengers. It shows that mentally factor is important as well.
I think that explanation is, that passengers are passively affected by altered gravity or uncommon visual or sound stimulation and operators of the transport devices are in more active state of mind in time when they are affected by altered gravity, uncommon visual or sounds stimulation.



Luka Tunjic
http://www.freewebs.com/lukatunjic/

 
Title: Motion sickness theory is a swindle
Post by: sgroclkc on 12/01/2007 01:44:03
Infrasonic of train is small,motion sickness was a low incidence,but I have not heard that people on train get motion sickness
Title: Motion sickness theory is a swindle
Post by: sgroclkc on 15/02/2007 00:54:38
These motion sickness experts made up a formidable vested interest group.
Title: Motion sickness theory is a swindle
Post by: sgroclkc on 07/03/2007 02:09:43
I have received a e-mail  so far,"eNotes Support" <help-support@enotes.com>
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Title: Motion sickness theory is a swindle
Post by: another_someone on 07/03/2007 02:40:50
I think there are many different aspects of transport sickness, and different people are subject to different aspects of them.

To date, I have never been sea sick in my life (I did feel queasy on one journey, but that was more from the smell of vomit of the other passengers rather than my own motion sickness).  In general, the rougher the sea, the more I enjoy it (together with just a hint of shadenfreuden  - not very nice of me, I know).

I used to be car sick when I was less experienced in cars (my first time on a boat was when I was about 4 months old, and that was for 32 days, so it may have inoculated me against sea sickness).

One related aspect of this is that many years ago I started taking flying lessons, and on one occasion my flying instructor took me just along the upper boundary of the clouds, while we were skimming in and out of the clouds (flying on instruments), and I think he thought that might disorientate me.  I was not at all disorientated, and I suspect I just have a knack of disassociating my visual senses from my other senses (it probably also relates to the fact that I cannot have a strong emotional response to visual stimuli).  This may well be something that protects me against motion sickness.

On the other hand, I do get drowsy (but not sick) from infrasound.

As for train sickness, it is unusual, but the train under the channel tunnel does seem to effect some people (my mother is one of them - she is effected more by that than by sea sickness).
Title: Motion sickness theory is a swindle
Post by: Bored chemist on 07/03/2007 19:24:51
Do deaf people get seasick?
If so then I think we can kiss goodbye to any idea that it's produced by infrasound (at least unless you can find another organ to sense the infrasound).
This page
http://www.royaldeaf.org.uk/page.php?id=100303
sugests that deaf peopel do suffer from seasickness.

I don't get seasick (or airsick or whatever) but I do get uncomfortable when there are high levels of low frequency sound- the ventilation system where I work sometimes has this effect.
Title: Motion sickness theory is a swindle
Post by: another_someone on 07/03/2007 22:42:09
Do deaf people get seasick?
If so then I think we can kiss goodbye to any idea that it's produced by infrasound (at least unless you can find another organ to sense the infrasound).
This page
http://www.royaldeaf.org.uk/page.php?id=100303
sugests that deaf peopel do suffer from seasickness.

I don't get seasick (or airsick or whatever) but I do get uncomfortable when there are high levels of low frequency sound- the ventilation system where I work sometimes has this effect.

I think infrasound can be detected away from the ear (in any case, it will depend on the nature of deafness, since I doubt it would effectively be channelled by the outer ear).

Don't forget that Beethoven could detect infrasound despite the deafness of his later years, and if you stand in a church with an organ playing its deepest notes, you will feel those notes right through your body, not merely through your ears (these notes do not normally record well on recordings of organ music, and that is the difference between listening to organ music live, and listening to a recording of it).

This is not to suggest that infrasound causes sea sickness (I never suggested that, only that it can induce drowsiness, and this has sometimes been claimed to be a factor in drivers falling asleep on long journeys).
Title: Re: Motion sickness theory is a swindle
Post by: sgroclkc on 20/02/2017 01:53:04
Motion sickness is caused by a kind of special, the low dull rumbling sounds.For example,we not get carsick can't hear this noise from the trains, subways, trucks, motorcycles, tractors
Title: Re: Motion sickness theory is a swindle
Post by: Bored chemist on 20/02/2017 22:13:02
Wow!
You came back after all this time, and ignored the evidence.
Title: Re: Motion sickness theory is a swindle
Post by: sgroclkc on 09/03/2017 07:42:26
Motion sickness is caused by a kind of special, the low dull rumbling sounds
Title: Re: Motion sickness theory is a swindle
Post by: sgroclkc on 09/03/2017 07:54:41
Carsickness is caused by the motor which produces a special and rumbling low-frequency noise. Train, metro, truck, motorcycle and tractor which produce no such noise will cause no carsickness.
Title: Re: Motion sickness theory is a swindle
Post by: Colin2B on 10/03/2017 08:58:31
Carsickness is caused by the motor which produces a special and rumbling low-frequency noise.
Motion sickness occurs without an engine.
Standard laboratory test to induce motion sickness is a standard office chair, subject blindfolded, chair rotated, subject told to put head back to side etc. Very rarely does this fail to bring on motion sickness. No motor.

Train, metro, truck, motorcycle and tractor which produce no such noise will cause no carsickness.
No so. I know people who suffer motion sickness on all of these.

If you have a theory of vibration induced sickness you need to clasify it as a separate theory from motion sickness.
Title: Re: Motion sickness theory is a swindle
Post by: alancalverd on 10/03/2017 10:00:22
For really good, violent and repetitive motion sickness, try glider aerobatics. No engine, and the better the glider, the less vibration at any frequency (noise and vibration = lost energy, and we don't like that!). It works best if you are in the front seat and the pilot  is behind you, so you have no visual cue as to what happens next. Those of a nauseous disposition can throw up when entering a very gentle turn, and even hardened powered aviators have a problem hanging on to their breakfast during a glider display sequence flown by the guy in the back seat.

Flying dual cross-country needs regular swaps between navigation and handling duties even in a side-by-side glider to avoid mal-d'air. Taking control gives you the cues you need to avoid eye/ear/brain confusion, which is why car drivers don't get sick when their passengers do. 
Title: Re: What causes motion sickness?
Post by: sgroclkc on 13/03/2017 14:07:15
Carsickness is caused by the motor which produces a special and rumbling low-frequency noise.
Motion sickness occurs without an engine.
Standard laboratory test to induce motion sickness is a standard office chair, subject blindfolded, chair rotated, subject told to put head back to side etc. Very rarely does this fail to bring on motion sickness. No motor.

Train, metro, truck, motorcycle and tractor which produce no such noise will cause no carsickness.
No so. I know people who suffer motion sickness on all of these.

If you have a theory of vibration induced sickness you need to clasify it as a separate theory from motion sickness.
The symptoms caused respectively by gyrating and carsickness are quite different. Gyrating movements will cause dizziness, while carsickness usually causes nausea or sleepiness. This is why authors of many scholar articles only state that gyrating symptoms are associated to carsickness, but the reasons behind carsickness are still unknown. Only unreliable knowledge popularizing articles say that the reason of carsickness is gyrating movements. This is not true. Actually, gyrating movements are not related to carsickness, which is actually caused by a special low-frequency noise. Only this kind of noise can cause exactly the same symptoms of carsickness. For example, even without staying on the airplane, the noise of airplane engine can also cause symptoms of carsickness. Experts of carsickness around the world all know that only noise can cause exactly the same symptoms of carsickness, but they fraud people by saying that this phenomenon is only a psychological reaction!
Title: Re: What causes motion sickness?
Post by: alancalverd on 13/03/2017 23:57:15
The stuff in my sickbags depends on what the victim had for breakfast, not whether the aircraft has an engine.

Part of the problem with instrument flying, yacht navigation or rear-seat car sickness is the inability of the semicircular canals to distinguish between linear acceleration and circular motion.    You can induce carsickness by stop-start driving on a straight road, and airsickness on scheduled flights or glider "dolphining"  is caused by sudden changes of pitch attitude, not turning.   

If it's all due to infrasound, why don't pilots and drivers suffer the same symptoms as their passengers? It isn't a matter of aptitude or experience - hardened drivers often throw up when navigating in rallies, and the most experienced pilots still need to swap duties with each other to avoid becoming incapacitated under competition conditions. 

The one time I had an entirely incapacitated crew was on a fairly large yacht, reaching  into an opposing tide. For about two hours, we made no progress over the ground but just pitched and rolled at random intervals in almost total silence, broken only by groans and the sound of eight experienced sailors donating their stomach contents to the sea. The only relief was to do something: taking the helm in turn, or tweaking the sheets, though the latter was completely unncessary as we had the boat pretty well trimmed anyway, but the feeling of being a bit in control or able to anticipate the next roll was very calming.

Early on in my sailing days I noticed an uncharacteristic craving for ginger biscuits. I later discovered that Chinese sailors have always used ginger as a prophylactic against seasickness, and it seems to work as well as modern molecules without inducing drowsiness. Any explanation would be welcome!
Title: Re: What causes motion sickness?
Post by: jeffreyH on 14/03/2017 21:26:43
Gingerols and shogaols.
http://www.sciencedirect.com/science/article/pii/S0031942215300509 (http://www.sciencedirect.com/science/article/pii/S0031942215300509)

Title: Re: What causes motion sickness?
Post by: alancalverd on 15/03/2017 07:35:12
Cool stuff, thanks.

Next time I do a glider aerobatic flight with a passenger, maybe I'll check the sickbag for curry residues. Or maybe not.
Title: Re: What causes motion sickness?
Post by: sgroclkc on 16/03/2017 00:01:03
The stuff in my sickbags depends on what the victim had for breakfast, not whether the aircraft has an engine.

Part of the problem with instrument flying, yacht navigation or rear-seat car sickness is the inability of the semicircular canals to distinguish between linear acceleration and circular motion.    You can induce carsickness by stop-start driving on a straight road, and airsickness on scheduled flights or glider "dolphining"  is caused by sudden changes of pitch attitude, not turning.   

If it's all due to infrasound, why don't pilots and drivers suffer the same symptoms as their passengers? It isn't a matter of aptitude or experience - hardened drivers often throw up when navigating in rallies, and the most experienced pilots still need to swap duties with each other to avoid becoming incapacitated under competition conditions. 

The one time I had an entirely incapacitated crew was on a fairly large yacht, reaching  into an opposing tide. For about two hours, we made no progress over the ground but just pitched and rolled at random intervals in almost total silence, broken only by groans and the sound of eight experienced sailors donating their stomach contents to the sea. The only relief was to do something: taking the helm in turn, or tweaking the sheets, though the latter was completely unncessary as we had the boat pretty well trimmed anyway, but the feeling of being a bit in control or able to anticipate the next roll was very calming.

Early on in my sailing days I noticed an uncharacteristic craving for ginger biscuits. I later discovered that Chinese sailors have always used ginger as a prophylactic against seasickness, and it seems to work as well as modern molecules without inducing drowsiness. Any explanation would be welcome!
It  was  firstly  proposed  by  a  Chinese  physicist  of  acoustics  that  motion  sickness  was  caused  by  infrasound.  After  reflecting  on  this  over  and  over  again  for  years,  I  think  this  view  is  wrong.  In  my  opinion,  motion  sickness  is  supposed  to  result  from  booming  low-frequency  noise.  For  instance,  it  is  beyond  doubt  that  extremely  loud  booming  low-frequency  noise  is  always  heard  inside  vehicles  which  easily  bring  about  motion  sickness.  Inside  vehicles  without  such  noise,  motion  sickness  isnít  caused  at  all.  In  spite  of  loud  noise  of  tractors,  people  donít  feel  sick  inside  them  because  there  is  no  booming  low-frequency  noise.  The  key  reason  consists  in  that  the  noise  of  tractors  doesnít  distract  people  because  they  donít  impact  their  verbal  communications  due  to  differences  between  frequency  of  the  noise  and  peopleís  voices. 
     Some  other  evidences  can  prove  that  motion  sickness  just  arises  from  the  aforementioned  noise:  People  with  good  hearing  easily  suffer  from  motion  sickness,  while  the  deaf  and  dumb  who  canít  hear  donít  feel  sick  inside  vehicles  at  all.  The  noise  is  louder  inside  fairly  closed  vehicles,  so  people  easily  get  sick  in  highly  closed  luxury  buses  and  cars.  The  noise  is  so  penetrating  that  motion  sickness  canít  be  avoided  either  even  if  ears  are  covered  with  something. 
        The  cause  of  such  amazing  trick  is  medical  expertsí  lack  of  knowledge  about  acoustics.  They  have  only  noticed  that  the  tractor  doesnít  cause  motion  sickness  although  it  is  rather  noisy,  so  they  have  wrongly  concluded  that  motion  sickness  doesnít  result  from  noise.  In  fact,  they  havenít  discerned  that  the  noise  of  a  tractor  differs  from  the  low-frequency  noise  which  brings  about  motion  sickness.  Although  they  couldnít  figure  out  the  cause  of  motion  sickness,  they  were  too  hasty  to  reach  a  conclusion.  As  a  consequence,  they  have  scientifically  tricked  people  that  motion  sickness  is  associated  with  many  factors  such  as  shaking,  movement  and  visual  motion. 
Title: Re: What causes motion sickness?
Post by: Colin2B on 16/03/2017 09:18:06
Early on in my sailing days I noticed an uncharacteristic craving for ginger biscuits. I later discovered that Chinese sailors have always used ginger as a prophylactic against seasickness, and it seems to work as well as modern molecules without inducing drowsiness. Any explanation would be welcome!
Lots of sailors swear by ginger and interestingly NHS site recommends it for morning sickness. I've never found any firm evidence, some studies say it works others not. It's often discussed on sailing forums but seems to depend on the individual whether it works. It's a long time since I trawled the research, might have another look, if I come across anything interesting I'll let you know.
One thing most sailors will agree on is that getting your head down on a centre bunk really helps. Obviously there is less motion in the centre area and closing eyes removes the conflict , but I wonder whether the inner ear is more sensitive when head is upright than when prone.
Title: Re: What causes motion sickness?
Post by: alancalverd on 17/03/2017 15:59:57
Some  other  evidences  can  prove  that  motion  sickness  just  arises  from  the  aforementioned  noise:  People  with  good  hearing  easily  suffer  from  motion  sickness,  while  the  deaf  and  dumb  who  canít  hear  donít  feel  sick  inside  vehicles  at  all. 

Worth considering whether you are talking about profoundly deaf people or folk with normal neurology and anatomy but age- or noise-related deafness. Even age or disease can reduce one's propensity to mal de mer as the fluid in  the semicircular canals thickens. A friend of mine suffers from nausea with almost any change in position, due to deposition of calcite crystals in the canals - a fairly common and inherited condition -  which send multiple attitude signals to the brain.

Infrasound can indeed induce nausea, but the mechanism is thought to be different - either resonance in the chest cavity or disturbance of gut peristalsis. The human ear does not respond to sounds below about 15 Hz, which is why they are callled infrasound.   
Title: Re: What causes motion sickness?
Post by: sgroclkc on 19/03/2017 02:15:23
Wow!
You came back after all this time, and ignored the evidence.
The evidence show that people who gets sick in a car usually can travel in trains or motorcycles without any discomfort at all.

Why?

Low intensity infrasound from autocar engines has been well recognised to induce car sickness - a mild serotonergic-vestibular disturbance involving nausea, giddiness, headache.
https://www.quora.com/How-does-sound-hearing-influence-motion-sickness
Title: Re: What causes motion sickness?
Post by: alancalverd on 19/03/2017 08:59:43

The evidence show that people who gets sick in a car usually can travel in trains or motorcycles without any discomfort at all.

Why?


Because trains don't accelerate, decelerate and change direction as often or as violently as cars, and you turn a motorbike by leaning into the turn so you don't experience anomalous g-force and the passenger has a visual cue to the turn.  Plus the motorbike passenger is busy all the time, holding on and following the driver's lean, and can see where he is going.
Title: Re: What causes motion sickness?
Post by: Colin2B on 19/03/2017 09:16:58
The evidence show that people who gets sick in a car usually can travel in trains or motorcycles without any discomfort at all.
In addition to the post above which I agree with.
I know 2 pillion passengers who had to give up because of motion sickness. I also know people who can travel in a train if facing forwards, but not if facing backwards.
The only time I have felt motion sickness in a car was in the back of a taxi on one of the drop down rear facing seats.
Your 'evidence' is not empirically verified.
Title: Re: What causes motion sickness?
Post by: sgroclkc on 24/03/2017 06:05:26
Roaring low-frequency noise instead of infrasound causes carsickness. Symptoms of carsickness get stronger when vehicles bump or shake more frequently, which is just a coincidence. It is just because low-frequency noise gets louder when bumping and shaking gets more serious. Without such low-frequency noise, people will not feel carsick no matter how hard the car bumps or shakes. For example, people get carsick on trains or subways running at the same speed when hearing low-frequency noise. Without such noise on trains or subways, carsickness can be avoided. It fully proves that low-frequency noise is the only reason that causes carsickness.   
     By far, there has been no effective methods or progress to solve carsickness, as a result of false and deceptive carsickness theories brought up by authorities and experts. If people can acknowledge the view that low-frequency noise leads to carsickness, then they can immediately and completely get rid of carsickness, plane-sickness, or seasickness (part of seasickness is caused by low-frequency noise from storm at sea, which is unavoidable natural disaster) caused by low-frequency noise from the engine as long as all transportation tools stop generating such noises. It is readily feasible in terms of technology. Thus, if consumers purchase cars with loud noise, which is severe quality issue, they should immediately claim compensation from car manufacturers and require them to recall for remodeling until it stops making such noises in operation. Therefore, such noises will not only cause painful carsickness, but lead to hearing loss under long stimulation from such noises.
Title: Re: What causes motion sickness?
Post by: Morgan IAT on 30/03/2017 00:03:32
So how do things like 'facing forward' help reduce the effects of motion sickness?
Title: Re: What causes motion sickness?
Post by: alancalverd on 30/03/2017 14:17:15
(part of seasickness is caused by low-frequency noise from storm at sea, which is unavoidable natural disaster)

Never had a yacht crew be sick in a storm - too busy! But fishing with the engine shut down on a windless, silent, rocking sea, usually has everyone heaving up over the side. Good news is that this attracts more fish.
Title: Re: What causes motion sickness?
Post by: sgroclkc on 10/04/2017 03:56:04
Women only seem to be more susceptible to motion sickness than men because they have better hearing.Dog more prone to motion sickness than people because dog have better hearing than people.
Title: Re: What causes motion sickness?
Post by: sgroclkc on 12/04/2017 03:45:54
To  alancalverd
People get carsick on trains or subways running at the same speed when hearing low-frequency noise. Without such noise on trains or subways, carsickness can be avoided. It fully proves that low-frequency noise is the only reason that causes carsickness.
Title: Re: What causes motion sickness?
Post by: nilak on 12/04/2017 10:58:20
I can tell how I think it it works in my case. I have sea sickness that occurs after about half an hour, and also if i am onboard  a  helicopter for more than 3-4 hours.
In the past I have experienced a period of chronic fatigue that made me even more sensitive to motion. I have onserve that if I played on a computer a game that I wasn't used to the motiom mechanics, I would get that sickness quite quickly. A 3d video for example can make almost anyone feel sick. Therefore, the sickness must be related to the brain. If the motion you experience doesn't match what the brains expect to happen the brain needs to learn the new mechanics. If the flow information that comes is high, I suppose that some hormones are activated that enables the brain to cope with the high demand. However, if the hormone production cannot keep upwith  the requirements the hormones levels go down and the brain cannot handle the situation well and you get sick. Now that I have passed the chronical fatigue phase, I can cope much better with things like that. The chronical fatigue was confirmed by symptoms like poor sleep during night and sleepiness during the day, slow recovery after exercise, poor digestion, joint pain, poor immunity (frequent colds),etc.
As a conclusion, it should be related to the hormone production capacity and overal endocrine strengthness.
Also if you have a problem with the inner ear for example it can cause random inputs that confuse the brain.
Title: Re: What causes motion sickness?
Post by: sgroclkc on 05/07/2017 00:43:50
I can tell how I think it it works in my case. I have sea sickness that occurs after about half an hour, and also if i am onboard  a  helicopter for more than 3-4 hours.
In the past I have experienced a period of chronic fatigue that made me even more sensitive to motion. I have onserve that if I played on a computer a game that I wasn't used to the motiom mechanics, I would get that sickness quite quickly. A 3d video for example can make almost anyone feel sick. Therefore, the sickness must be related to the brain. If the motion you experience doesn't match what the brains expect to happen the brain needs to learn the new mechanics. If the flow information that comes is high, I suppose that some hormones are activated that enables the brain to cope with the high demand. However, if the hormone production cannot keep upwith  the requirements the hormones levels go down and the brain cannot handle the situation well and you get sick. Now that I have passed the chronical fatigue phase, I can cope much better with things like that. The chronical fatigue was confirmed by symptoms like poor sleep during night and sleepiness during the day, slow recovery after exercise, poor digestion, joint pain, poor immunity (frequent colds),etc.
As a conclusion, it should be related to the hormone production capacity and overal endocrine strengthness.
Also if you have a problem with the inner ear for example it can cause random inputs that confuse the brain.
Your  question  has  already  been  thought  about  a  lot,  if  seasickness  is  caused  by  shaking,  then  why  until  now  there  is  no  exercise  specialist  says  that  the  cause  of  motion  sickness  have  been  found  in  the  world  is  shaking?  But  why  do  the  real  recognized  reasons  of  motion  sickness  not  be  found?  I  always  take  the  boat  with  a  big  quake,  but  I  never  have  the  feeling  of  seasickness  and  never  see  the  people  around  me  have  the  slightest  seasick  symptom.The  old  crew  on  the  sea  almost  all  the  year  round  has  said  that  the  more  shaking  the  boat  is,  the  less  possibility  to  get  seasick.  Thus  it  can  be  seen  that  seasickness  has  nothing  to  do  with  shaking  and  sports.  Ancient  Chinese  and  ancient  Greece  had  a  view  that  the  boat  sailing  on  the  sea  would  cause  nausea  when  it  met  sandstorms(Because  carsickness  and  seasickness  only  have  the  signs  of  nausea  and  vomiting  with  no  vertigo  syndromes.  Only  rotation  will  have  symptoms  of  dizziness  and  seasickness.  Carsickness  and  seasickness  with  the  symptom  of  dizziness  are  fabricated  by  experts  to  confuse  the  symptom  of  carsickness  and  seasickness  with  that  of  dizzy.)  There  is  no  saying  that  ancient  people  would  feel  nausea  when  they  took  the  shaking  carriages  with  large  turbulence,  this  is  because  the  shaking  of  ancient  carriage  is  very  violent,  but  there  is  no  engine  producing  low-frequency  noise,  that  won't  cause  carsickness.  Different  reasons  will  inevitably  lead  to  different  results.  If  the  shaking  of  boat  can  really  cause  seasickness,  so  this  kind  of  seasick  symptom  caused  by  shaking  and  seasickness  caused  by  low-frequency  noise  will  certainly  be  different,  which  can  just  prove  seasickness  has  two  reasons,  low-frequency  noise  and  shaking  that  will  cause  relevant  two  different  seasickness.  As  I  discovered  in  1992,  the  nightmare  was  caused  by  two  palpitations,  racing  heart  and  slow  beating,  which  would  correspondingly  cause  being  pursued,  attacked  and  people  flying  up  and  down.  So  seasickness  has  the  same  story  with  these  two  common  nightmares. 
Title: Re: What causes motion sickness?
Post by: sgroclkc on 13/08/2017 02:46:35
The same view . https://www.quora.com/How-does-sound-hearing-influence-motion-sickness