Auditory brain-stem electric responses evoked with suprathreshold tone-bursts.
The brain-stem electric responses elicited by tone-bursts with central frequency at octave intervals from 0.5 to 4 kHz and at 80--100 dB HL stimulus levels have been studied in normally hearing subjects and patients with sensorineural hearing loss. Jewett V latencies were considerably prolonged in patients with retrocochlear or central pathology. Latencies from normal and cochlear hearing loss ears were largely independent of thresholds at both the stimulus and other frequencies. The interpretation of response latencies at suprathreshold stimulus levels is discussed. Stimulus frequency should be selected in accordance with the pure-tone audiogram, and ears with prolonged latencies investigated at more than one frequency.
D001299:Audiometry / Q000379:methods*; D001300:Audiometry, Evoked Response / Q000379:methods*; D002528:Cerebellar Neoplasms / Q000175:diagnosis*; D002530:Cerebellopontine Angle; D006319:Hearing Loss, Sensorineural / Q000175:diagnosis* / Q000209:etiology; D006801:Humans; D011930:Reaction Time