title: Frequency characteristics of summating potential in Menière's disease.
abstract: SP iso-response functions in 9 patients with Menière's disease were examined for differences in the properties between +SP and -SP. The iso-response functions of +SP and -SP exhibited a large difference. The iso-response function for +SP was centered at high frequencies (around 9 kHz in most cases) with fairly steep slopes on both sides towards both higher and lower frequencies, whereas -SP showed a low-pass function. The tendency was found for patients with normal hearing at high frequencies to have a larger Q10dB than patients with a hearing loss. The difference in properties between +SP and -SP suggests the possibility that +SP may provide different information on the pathophysiology of Ménière's disease from that obtained from -SP.
authors.affiliation: Department of Otolaryngology, Kagawa Medical School, Japan.
authors.forename: N
authors.initials: N
authors.lastname: Mori
authors.forename: H
authors.initials: H
authors.lastname: Asai
authors.forename: A
authors.initials: A
authors.lastname: Shugyo
authors.forename: M
authors.initials: M
authors.lastname: Sakagami
mesh_terms: D000161:Acoustic Stimulation; D000328:Adult; D001300:Audiometry, Evoked Response; D001301:Audiometry, Pure-Tone; D001309:Auditory Threshold; D007758:Ear, Inner / Q000503:physiopathology; D004558:Electric Stimulation; D004567:Electrodes, Implanted; D005260:Female; D006801:Humans; D008297:Male; D008575:Meniere Disease / Q000175:diagnosis* / Q000503:physiopathology; D008875:Middle Aged; D014432:Tympanic Membrane