CC BY 4.0 · Int Arch Otorhinolaryngol 2024; 28(03): e502-e508
DOI: 10.1055/s-0044-1785457
Original Research

Peripheral Auditory Pathway and ABR Characterization in Adults with Williams Syndrome[*]

1   Department of Physical, Speech-Language-Hearing, and Occupational Therapies, School of Medicine, Universidade de São Paulo (FMUSP), São Paulo, SP, Brazil.
,
1   Department of Physical, Speech-Language-Hearing, and Occupational Therapies, School of Medicine, Universidade de São Paulo (FMUSP), São Paulo, SP, Brazil.
,
1   Department of Physical, Speech-Language-Hearing, and Occupational Therapies, School of Medicine, Universidade de São Paulo (FMUSP), São Paulo, SP, Brazil.
,
1   Department of Physical, Speech-Language-Hearing, and Occupational Therapies, School of Medicine, Universidade de São Paulo (FMUSP), São Paulo, SP, Brazil.
› Author Affiliations
Funding The authors declare that they have received no grants from agencies in the public, private, or non-profits sectors for the conduction of the present study.

Abstract

Introduction Williams syndrome (WS) is a genetic disorder caused by a microdeletion in chromosome 7, affecting ∼ 28 genes. Studies have demonstrated conductive losses seemingly related to the absence of the elastin gene and mild to profound sensorineural losses due to cochlear fragility.

Objective To characterize and compare the peripheral auditory system and auditory brainstem response (ABR) of adults with WS and neurotypical adults matched by age and gender.

Methods We conducted a cross-sectional observational study with 30 individuals of both sexes, aged 18 to 37 years – 15 of them with WS (study group) and 15 with neither the syndrome nor hearing complaints (control group), matched for sex and age. The subjects underwent pure-tone and speech audiometry, acoustic immittance, transient-evoked otoacoustic emissions (TEOAEs), and ABR.

Results Early-onset sensorineural hearing loss was found in 53.3% of the study sample, mostly mild, occurring above 3 kHz. The TEOAEs were absent in 53.3% of assessed subjects; for those in whom they were present, the signal-to-noise responses were significantly lower than in the control group. In the ABR, increased absolute latencies were observed in waves I and III.

Conclusion Individuals with WS have early and progressive cochlear impairments, mainly affecting the basal region of the cochlea. They may have low brainstem changes which seem to begin in adulthood.

Data Availability Statement

The data of the present study can be accessed upon reasonable request to the corresponding author.


* The present study was conducted at the Department of Physical, Speech-Language-Hearing, and Occupational Therapies of the School of Medicine of Universidade de São Paulo (FMUSP).




Publication History

Received: 04 July 2023

Accepted: 16 January 2024

Article published online:
05 July 2024

© 2024. The Author(s). This is an open access article published by Thieme under the terms of the Creative Commons Attribution 4.0 International License, permitting copying and reproduction so long as the original work is given appropriate credit (https://creativecommons.org/licenses/by/4.0/)

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