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**quorceopporce** · 03-23-2009, 07:55 AM

I suffer badly in cars as a passenger (although I am fine when driving).

As a passenger if I for example have a bag at my feet in the footwell and I reach down to get something from it whilst the car is moving, thats usually enough to make me green....

Exactly, violent movement as such does not make people sick, it's the disorientation that does it. The track looked to have alot of sloping ground, anytime a flat visual horizon is not available, disorientation and then motion sickness is more likely to occur.

This is because we rely on a visual reference for most of our balance information, once that conflicts with the inner ear we get disorientated and sick. When you tip your head down while also moving in a vehicle the inner ear (semicircluar canals) gives you information that contradicts the visual image.

It's so common for people to get disorientated this way, that it's actively taught never to do this as a pilot.

03-23-2009, 07:55 AM	#12
quorceopporce Join Date Oct 2005 Posts 597 Senior Member	I suffer badly in cars as a passenger (although I am fine when driving). As a passenger if I for example have a bag at my feet in the footwell and I reach down to get something from it whilst the car is moving, thats usually enough to make me green.... Exactly, violent movement as such does not make people sick, it's the disorientation that does it. The track looked to have alot of sloping ground, anytime a flat visual horizon is not available, disorientation and then motion sickness is more likely to occur. This is because we rely on a visual reference for most of our balance information, once that conflicts with the inner ear we get disorientated and sick. When you tip your head down while also moving in a vehicle the inner ear (semicircluar canals) gives you information that contradicts the visual image. It's so common for people to get disorientated this way, that it's actively taught never to do this as a pilot.
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