I can’t read for any length of time in a moving vehicle — it makes me nauseous. This is because in order for the body to determine where it is at all times, the brain combines visual information, touch information, inner ear information, and internal expectations to judge its position in space.
Under most circumstances, the senses and expectations agree. When they disagree, there is conflict, and motion sickness can occur. In my case with reading in a car, my eyes that are fixed on the written page tell my brain that I am still. However, as the car goes over bumps and accelerates or decelerates, my inner ear disagrees resulting in my brain activating the nausea center and causing motion sickness.
*This blog post was originally published at Dr. Wes*