Related Experiment Video
Updated: Oct 22, 2025
11:39
Assessment of Audio-Tactile Sensory Substitution Training in Participants with Profound Deafness Using the Event-Related Potential Technique
Published on: September 7, 2022
2.3K
Auditory testing profiles of Pelizaeus-Merzbacher disease
James M Coticchia1, M A Diane Roeder1, Giancarlo F Zuliani1
1Department of Otolaryngology-Head and Neck Surgery, Wayne State University School of Medicine, 540 E. Canfield, 5E-UHC, Detroit, MI 48201, United States.
International Journal of Pediatric Otorhinolaryngology Extra
|August 26, 2021
Summary
Pelizaeus-Merzbacher Disease (PMD) patients show abnormal auditory brainstem responses and central auditory processing deficits. These audiological issues correlate with disease severity, highlighting the need for comprehensive hearing tests in PMD patients.
Area of Science:
- Neuroscience
- Audiology
- Genetics
Background:
- Pelizaeus-Merzbacher Disease (PMD) is a rare X-linked dysmyelinating disorder.
- Classic PMD symptoms include nystagmus, spastic quadriparesis, ataxia, and cognitive delay.
- Auditory manifestations in PMD are not well-characterized.
Purpose of the Study:
- To characterize the auditory manifestations in patients with Pelizaeus-Merzbacher Disease (PMD).
- To investigate the relationship between audiological findings and disease severity in PMD patients.
Main Methods:
- Prospective case study of 8 PMD patients (5 pediatric, 3 adult).
- Comprehensive audiological evaluations including audiometry, tympanometry, otoacoustic emissions, and Auditory Brainstem Response (ABR).
- Auditory processing tests: Dichotic Listening, Frequency Pattern Test, Duration Pattern Test.
Main Results:
- All subjects exhibited abnormal electrophysiological findings (ABR) with normal cochlear function.
- Adult patients demonstrated central auditory dysfunction on processing tests, with significant left ear deficits in dichotic digits and poor duration pattern scores.
- Strong right ear advantage observed in adult PMD patients during Dichotic Digit testing.
- Greater disease severity correlated with more severe central auditory dysfunction.
Conclusions:
- Abnormal auditory brainstem responses and central auditory processing deficits are characteristic of PMD.
- A comprehensive audiological test battery is crucial for evaluating PMD patients.
- These findings underscore the importance of audiological assessment in managing severe neurological disorders.
