Contralateral suppression of transient evoked otoacoustic emissions in children with auditory processing disorder

Area of Science:

• Audiology
• Neuroscience
• Pediatrics

Background:

• Auditory processing disorder (APD) affects sound interpretation.
• Transient evoked otoacoustic emissions (TEOAEs) assess cochlear function.
• The efferent auditory pathway's role in APD is under investigation.

Purpose of the Study:

• To investigate contralateral white noise suppression of TEOAEs in children with and without APD.
• To determine if TEOAE suppression differs between APD severity levels.
• To evaluate TEOAE suppression as a diagnostic tool for APD.

Main Methods:

• Fifty-one children (7–11 years) were grouped: controls (n=15), high-scoring APD (n=20), low-scoring APD (n=16).
• Transient evoked otoacoustic emissions (TEOAEs) were measured with and without contralateral white noise.
• TEOAE suppression was assessed in linear and nonlinear acquisition modes.

Main Results:

• Abnormal TEOAE suppression was significantly more frequent in both APD groups compared to controls.
• No significant difference in suppression abnormality was noted between high and low APD scoring groups.
• Contralateral TEOAE suppression revealed differences related to APD.

Conclusions:

• Contralateral TEOAE suppression is less common in children with APD.
• This method offers an additional tool for evaluating the efferent auditory pathway in pediatric APD.
• TEOAE suppression assessment aids in understanding auditory processing deficits.