Motion sickness is a common problem in people [?] by car, train, airplanes and especially boats. Motion sickness [?] start suddenly, with a queasy feeling and cold sweats. [?] can then lead to dizziness, nausea and vomiting.

Your brain senses movement by getting signals [?] your inner ears, eyes, muscles and joints. When it gets signals that do [?] match, you can [?] motion sickness. For [?], down below on a boat, your inner ear senses motion, but your eyes cannot tell you [?] moving.

Where you sit can [?] a difference. The [?] seat of a car, forward cars of a train, upper deck on [?] boat or wing seats in a plane may give you a smoother [?]. [?] out into the distance - instead of trying to read or look [?] something in the [?] - can also help.