title: Middle components of the AER to tone-pips in normal-hearing and hearing-impaired subjects.
abstract: Tone-pips of 500, 1000, and 3000 Hz were presented at 0-, 10-, 20-, 35-, and 50-dB HL to 10 normal-hearing subjects and at 0-, 10-, 20-, 35-, and 50-dB SL to 10 subjects with conductive, sensorineural, or mixed hearing losses. Middle component (latencies 8-90 msec) averaged electroencephalic responses to the tone-pips were analyzed in terms of peak latencies and peak-to-peak amplitudes. Properties of the responses were generally the same for both normal-hearing and hearing-impaired subjects except that the hearing-impaired subjects showed slightly greater amplitudes overall. The small reduction in latencies with increasing stimulus frequency seen in the normal-hearing subjects was not observed in the hearing-impaired subjects.
mesh_terms: D000328:Adult; D001299:Audiometry / Q000379:methods; D001309:Auditory Threshold / Q000502:physiology*; D002540:Cerebral Cortex / Q000502:physiology / Q000503:physiopathology; D003638:Deafness / Q000175:diagnosis* / Q000503:physiopathology; D004569:Electroencephalography / Q000379:methods; D005071:Evoked Potentials; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D011930:Reaction Time / Q000502:physiology