Vertigo can also be brought on suddenly through various actions or incidents, such as skull fractures or brain trauma, sudden changes of blood pressure, or as a symptom of
motion sickness while sailing, riding amusement rides, airplanes or in a motor vehicle. Vertigo can also be caused by carbon monoxide poisoning. It is also one of the more common symptoms of superior canal dehiscence syndrome and Meniere's disease”.
Taken from http://en.wikipedia.