Vertigo is a medical condition wherein the person suffering feels motions of movement and dizziness when they are in fact stationary. Vertigo is thought to be caused by dysfunction of the inner ear, which regulates balance and motion in humans. Vertigo can cause difficulty in standing and walking, as well as inducing nauseous and vomiting due to the dizziness experienced. There are three different types of vertigo. Objective vertigo makes a person feel as if the objects around them are moving, as opposed to subjective vertigo where the person feels as if they are moving. The third type of vertigo, pseudovertigo, causes a person to feel as if there is rotation occurring inside of their own head.