title: Auditory nerve and brain stem responses to sound stimuli at various frequencies.
abstract: The responses of the auditory nerve and brain stem auditory nuclei have been recorded with ear lobe and scalp electrodes in response to unfiltered click stimuli which excite mainly high-frequency nerve fibers. In order to overcome this limitation, normal subjects and patients with hearing loss were stimulated with third-octave filtered clicks with center frequencies of 250, 500 and 1 000 Hz. Analysis of the responses suggests that these lower-frequency stimuli excite lower-frequency cochlear nerve fibers. It is concluded that low-frequency filtered clicks can be used to complement unfiltered clicks in order to obtain a more complete objective audiogram.
mesh_terms: D000161:Acoustic Stimulation; D000200:Action Potentials; D001299:Audiometry; D001306:Auditory Pathways / Q000502:physiology* / Q000503:physiopathology; D001933:Brain Stem / Q000502:physiology* / Q000503:physiopathology; D003056:Cochlear Nerve / Q000502:physiology* / Q000503:physiopathology; D006311:Hearing Disorders / Q000503:physiopathology; D006801:Humans