title: [Study of the cochlea by evoked otoemissions. Physiological interpretation of results].
abstract: Amplitudes and detection thresholds of evoked otacoustic emissions (EOE) were measured in various groups of subjects: 44 normal young adults, 80 patients with presbycusis and 38 patients with acoustic trauma. Relations between these EOE parameters and tonal audiogram were analyzed. Surprisingly, EOE detection threshold at 1 kHz was strongly correlated with auditory threshold at 2 kHz and no other one. This result demonstrates that some EOE parameters are not frequency-specific. A simple model is implemented in which it is assumed that EOE amplitudes are proportional to the global cochlear activity. This model fits very well experimental data and allows a quantitative evaluation of the residual cochlea. The domain of validity of EOE test in clinics has therefore been precised.
authors.affiliation: PAM Neuro-Sensoriel, Service Central de Biophysique et de Médecine nucléaire, Hôpital Lariboisière, Paris.
authors.forename: P
authors.initials: P
authors.lastname: Avan
authors.forename: P
authors.initials: P
authors.lastname: Bonfils
authors.forename: D
authors.initials: D
authors.lastname: Loth
authors.forename: M
authors.initials: M
authors.lastname: Teyssou
authors.forename: J
authors.initials: J
authors.lastname: Trotoux
authors.forename: P
authors.initials: P
authors.lastname: Narcy
mesh_terms: D001299:Audiometry; D001301:Audiometry, Pure-Tone; D003051:Cochlea / Q000503:physiopathology*; D015834:Cochlear Diseases / Q000175:diagnosis / Q000503:physiopathology*; D006317:Hearing Loss, Noise-Induced / Q000175:diagnosis / Q000503:physiopathology*; D006801:Humans; D011304:Presbycusis / Q000175:diagnosis / Q000503:physiopathology*
vernacular_title: Exploration de la cochlée par les otoémissions provoquées. Interprétation physiologique des résultats.