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Original Article

Potentiels évoqués auditifs rapides «dérivés»

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Pages 382-393 | Published online: 07 Jul 2009
 

Abstract

Brain stem auditory-evoked responses to a 70 dB SL click masked by high-passed noises were recorded in 12 normal hearing subjects. By applying the technique of derived potentials, the contributions of one-octave-wide frequency bands are assessed. Summation of these derived potentials gives a pattern similar to the unmasked-response waveform. Waves I and III show a strong predominance of high-frequency responses, whereas wave V is discernible down to low-frequency responses.

Les potentiels évoqués de la cochlée et du tronc cérébral sont enregistrés chez 12 sujets conjointement stimulés par un clic de 70 dB SL et des bruits passe-haut. En utilisant la technique des potentiels dérivés, les contributions de bandes de fréquence d'une octave sont analysées. La sommation de ces différents potentiels dérivés donne naissance à une courbe voisine de la réponse au clic non masqué. Les ondes I et III présentent principalement des contributions de fréquence aiguë, tandis que l'onde V est également générée par les bandes de fréquence grave.

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