How is motion sickness caused?
Motion sickness is usually caused by the difference between the perceptions of movement experienced by a person through the different senses. Usually, the brain experiences the sense of motion through the different signals coming from sense organs of the nervous system such as the inner ear, the eyes, and deeper tissues called proprioceptors. When a person walks or runs, the brain easily coordinates the different signals that signify movement. However, in case of unintentional movement, such as driving in a vehicle, the brain is unable to effectively coordinate conflicting inputs from the different senses. Motion sickness is believed to be the result of this conflict. Research has proven that the presence of the inner ear is important for motion sickness to occur. Blind people also experience motion sickness, which suggests that the visual sense is not essential for motion sickness to occur. Motion sickness is more common in complex forms of movement involving different directions of m
