ISSN : 2146-3123
E-ISSN : 2146-3131

Contralateral suppression of transient evoked otoacoustic emissions in children with phonological disorder
Şule Yılmaz1, Memduha Taş1, Erdoğan Bulut1,2
1Department of Audiology, Trakya University Faculty of Health Sciences, Edirne, Turkey
2Department of Otolaryngology, Hearing Research Laboratory, University of Miami Miller School of Medicine, Miami, FL, United States
DOI : 10.4274/balkanmedj.galenos.2020.2020.4.168
Pages : 127-132

Background: Perception of acoustic details in the speech signal is important for speech sound development. The medial olivocochlear pathway, a part of the auditory efferent system, plays a role in stimulus-related control of the cochlea. One clinical tool to evaluate the medial olivocochlear activity, which is thought to improve speech perception in noise, is the suppression of otoacoustic emissions.
Aims: This study investigated the suppression of transient evoked otoacoustic emissions in children with phonological disorder in comparison with that in typically developing controls.
Study Design: Case-control study.
Methods: A total of 23 children with phonological disorder (aged 5-10 years) and 21 age- and sex-matched controls (P > 0.05) participated in the study. Participants had pure-tone thresholds ≤ 15 dB hearing loss and normal middle ear functions. Transient evoked otoacoustic emissions with and without contralateral acoustic stimulation were measured.
Results: Although the mean transient evoked otoacoustic emissions suppressions were lower in the group with phonological disorder than in the controls, these differences were not statistically significant (P > 0.05). No left/right ear asymmetry of transient evoked otoacoustic emissions suppression was detected in either of the groups (P > 0.05).
Conclusion: Children with phonological disorder did not show alterations in medial olivocochlear functioning in the medial olivocochlear activity as measured by the contralateral suppression of transient evoked otoacoustic emissions.

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