Abstract
Three patients with traumatic positional vertigo were neurotologically examined. The first and second patients were middle-aged females who had suffered head injuries in traffic accidents. The first patient had left total deafness, and the second patient had no cochlear symptoms. The third patient was a male worker who was injured by falling rocks and had right sensorineural hearing loss. In all the three patients, we found brisk rotatory nystagmus accompanied with vertigo in the head hanging position. The theory of free-floating particles in the posterior semicircular canal seems to explain the rotatory nystagmus and the gradual decrease in its intensity. On the basis of this theory, a canalith repositioning procedure (CRP) was performed in all three patients. It was effective in the second and third patients, but in the first patient positional nystagmus and vertigo were unchanged.
