Brainstem auditory evoked responses that disappear during sleep: a possible manifestation of a neurogenic vestibular evoked response.

Abstract
To present a case of unilateral hearing loss in which a brainstem auditory evoked potential (BAEP) disappeared during sleep on the symptomatic side, and to argue that this may actually be a manifestation of a neurogenic vestibular evoked potential (NVESTEP).

Brainstem auditory evoked potentials were performed in the standard manner.
A poorly organized response was obtained during wakefulness on the symptomatic side that resembled a BAEP. The BAEP for the right ear was better organized. During sleep, the response for the left ear disappeared.