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Hidehaku Kumagami, MD; Hiroaki Nishida, MD; Masaaki Baba, MD

Arch Otolaryngol. 1982;108(5):284-288.

Abstract
• Auditory nerve action potential (AP), cochlear microphonics (CM), and summating potential (SP) were recorded from 32 patients with Ménière's disease. Patients were classified into three groups according to the degree of their hearing impairment. The group of patients that had a mild to moderate hearing loss and whose hearing was reversible showed notably satisfactory responses for AP, CM, and negative SP (-SP), and also showed a high incidence of positive SP (+SP). Low responses for AP and CM with an increase of detection thresholds and a high -SP/ AP ratio were obtained from patients with moderate hearing impairment, whose hearing fluctuated slightly. These electrocochleographic findings were suggestive of the pathophysiologic differences at the various stages of Ménière's disease.

(Arch Otolaryngol 1982;108:284-288)

Author Affiliations
From the Department of Otolaryngology, Nagasaki (Japan) University School of Medicine. (Dr Nishida was with Mercy Hospital and Medical Center, Chicago, when this was submitted.)

Footnotes
Accepted for publication Nov 12, 1981.

Reprint requests to Department of Otolaryngology, Nagasaki University School of Medicine, 7-1, Sakamoto-Machi, Nagasaki, Nagasaki 852, Japan (Dr Kumagami).

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