Methods of Inducing Motion Sickness

Motion sickness is defined as a conflict between the visual system and vestibular system—the sensory system in humans used to maintain a sense of balance and spatial orientation.29 Therefore, motion sickness may be induced by creating such a conflict in any of the two senses. Three possibilities can occur when there are conflicts in visual and vestibular cues. The first possibility is that both visual and vestibular cues are present but are giving conflicting information to the brain. In the other two possibilities, either visual or vestibular cues are absent. If visual signals are present and vestibular signals are absent, then this kind of motion sickness is mostly caused by viewing motion in a stationary environment. The symptoms are not very severe, but they can cause motion sickness. If the vestibular signal is present and visual signal is absent, this scenario is almost the opposite of the first case with stationary visual gaze and moving environment. For example, reading during a moving journey can cause this type of motion sickness.

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