Frequency characteristics of summating potential in Menière's disease.
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.
Mori
N
N
Department of Otolaryngology, Kagawa Medical School, Japan.
Asai
H
H
Shugyo
A
A
Sakagami
M
M
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