Motion sickness is a miserable experience, with sufferers having nausea, dizziness and cold sweats from the rocking of a boat, the swaying of a car or the swooping of a roller coaster. Unlike medications, this experimental therapy doesn't cause drowsiness. A mild electrical current applied to the scalp can fend off these symptoms. The electrical current interrupts confusing signals from the inner ear that lead to motion sickness. Tests involving a small group of people showed promise in preventing nausea. Motion sickness is a common complaint that can affect anyone. The cause of motion sickness remains a mystery, it occurs when what we see with our eyes or feel in our bodies is unable to line up perfectly with the balance messages that our brains receive from our inner ears.