Self-induced vertigo.

Benign paroxysmal positional vertigo is the most commonly recognized form of self-induced vertigo. This paper describes other means by which patients have been able to induce vertigo to the extent that at times it has been incapacitating. Hypotheses for the production of these phenomena are suggested in a number of the cases. Some of the features cannot be explained on the basis of our present knowledge of the vestibular system.