Motion sickness is a syndrome that occurs in response to real or perceived motion, which can include gastrointestinal, central nervous system, and autonomic symptoms.
Motion or sea or travel sickness is considered a physiological form of dizziness, since it is not indicative of a disease process. This can be induced in nearly all normal human subjects. The affects and conditions may vary in severity, as it may be produced with minimal provocation in some individuals but can be very difficult to elicit in others.
What is Nausea: The symptoms of motion sickness were first described by Hippocrates. They frequently occur during boat travel, and the principal symptom (nausea) is derived from the Greek word for ship (naus).