[Effect of a rotating sound source on postrotatory nystagmus]

In 10 healthy individuals the influence of a rotating sound source (loudspeaker, narrow band noise 500 Hz, 70 dB SPL, 120 degrees/sec.) on the postrotatory nystagmus was investigated. If the loudspeaker was rotating in the opposite direction of the fast postrotatory nystagmus component, the duration and intensity of the postrotatory nystagmus was amplified by about 30%. If the loudspeaker was rotating in the direction of the fast postrotatory nystagmus component, no changes were seen.