Contralateral acoustic effect of transient evoked otoacoustic emissions in neonates

A. Hamburger*, D. Ari-Even Roth, C. Muchnik, J. Kuint, M. Hildesheimer

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

Contralateral acoustic stimulation (CAS) has the effect of reducing the amplitude of transient evoked otoacoustic emissions (TEOAE) of the opposite cochlea. This phenomenon is considered to be mediated via the efferent pathway, from the superior olivary complex through the medial olivocochlear system to the contralateral cochlea. The assessment of this suppressive effect provides an objective and noninvasive technique for exploring the function of the efferent auditory system in humans. Two previous studies investigated the suppression effect of TEOAE in newborns and revealed a significant effect in 18 full-term neonates. In this study, the effect of contralateral acoustic stimulation on TEOAE was investigated in 13 full-term neonates (gestational age, 40-42 weeks). The TEOAE were recorded alternately with and without simultaneous, contralateral white noise. The CAS effect of TEOAE was present in all subjects; a mean of 2.21 dB ± 1.7 (21% ± 9.3%) was found. Our study demonstrated additional support for the functional maturity of the medial olivocochlear efferent system from birth.

Original languageEnglish
Pages (from-to)53-57
Number of pages5
JournalInternational Tinnitus Journal
Volume4
Issue number1
StatePublished - 1998

Keywords

  • Contralateral acoustic effect
  • Maturation
  • Medial olivocochlear system
  • Neonates
  • Otoacoustic emission
  • Suppression

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