Document Type : Original Articles

Authors

• Maryam Delphi ¹
• Ahmad Reza Nazeri ²
• Vafa Delphi ³
• Mahsa Bakhit ⁴

¹ PhD Student, Masculoskeletal Rehabilitation Research Center, Department of Audiology, University of Social Welfare and Rehabilitation Sciences, Ahwaz jundishapur University of Medical Sciences, Ahwaz, Iran

² PhD Student, Department of Audiology, University of Social Welfare and Rehabilitation Sciences, Tehran, Iran

³ BSc Student, Department of speech Therapy, School of Rehabilitation, Ahwaz University of Medical Sciences, Ahwaz, Iran

⁴ Academic Member, Masculoskeletal Rehabilitation Research Center, Department of Audiology, Ahwaz jundishapur University of Medical Sciences, Ahwaz, Iran

Abstract

Introduction: Unlike the afferent system, there is a paucity of data regarding the role of efferent hearing system in different aspects of language processing such as phonological processing. The purpose of this study was to evaluate the efferent hearing system in children with phonological disorders.Materials and Methods: In this study, 20 children with normal hearing, of both genders, who aged between 5 and 8 years were divided in to two groups of children without phonological disorders (n = 11, comprising the control group) and those with phonological disorders (n = 9, serving as the study group). The study included only those children whose hearing thresholds were below or equal to 15 dB, had a type tympanometry and their acoustic reflexes were present. TEOAE and TEOAE suppression were carried out to evaluate the function of the medial olivocochlear system in both groups.Results: There was no significant difference in the analyzed frequencies when the control and study groups were compared according to the mean effects of suppressive TEOAE.Conclusion: Children with phonological disorders do not show any alterations in the medial olivocochlear system.Keywords: Phonological disorders, Transient evoked otoacoustic emissions suppression, Medial olivocochlear bandle