Motion sickness is caused by “a mismatch in sensory cues,” Hac says. Our bodies rely on three main sensory inputs to show that we’re moving, which come from what we see, what our inner ear’s balance system perceives, and what fibres in our body sense, he says. When one of these is in conflict with the others – like if you’re looking at your phone so you don’t see visual signs of movement out of the window – that can cause motion sickness.
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