Motion or travel sickness is a condition in which a disagreement exists between a visually perceived movement and the vestibular system's sense of movement. Depending on the cause at the time, it can also be referred to as sea-sickness, car sickness, simulation sickness or even airsickness.
Travel sickness can be caused by travelling by car, boat or even simulation. Repeated movements such as going over bumps in a car or moving up and down in a boat can cause sickness. The inner ear sends different signals to your brain from those your eyes are seeing, which tricks the individual.
Motion sickness is also strongly associated with migraine in children and among young adults (university students). Migraines can lead to contractions and dilatations of brain and head blood vessels. This gives rise to attacks of headaches.
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