n.
Feeling that one is spinning or that one's surroundings are spinning around one, causing confusion and difficulty keeping one's balance, sometimes accompanied by nausea and vomiting .
Vertigo is normal after actual spinning, since inner-ear fluid continues to move once the body has stopped, producing a mismatch between visual and internal sensations. Lack of a stable visual reference point also contributes to this effect. Other causes include concussion and abnormalities of the inner ear (e.g., labyrinthitis; see otitis ), of the nerves that carry signals from it, or of the brain centers that receive them (e.g., stroke ). Vertigo is often confused with a feeling of faintness (see syncope ), since both are called dizziness. See also motion sickness , proprioception , spatial disorientation .