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Neural representation of consonant–vowel transition in individuals with cochlear hearing loss and auditory neuropathy spectrum disorder

  • Otology
  • Published:
European Archives of Oto-Rhino-Laryngology Aims and scope Submit manuscript

Abstract

Purpose

Acoustic change complex (ACC) is an evoked potential recorded in response to subtle change(s) in the continuing stimuli. It is assumed that poor speech perception can be due to poor encoding of consonant–vowel (CV) transition in cochlear hearing loss (CHL) and auditory neuropathy spectrum disorder (ANSD). The present study aims to investigate the use of ACC as an objective tool to study neural representation of CV transition in individuals with ANSD, CHL, and normal hearing (NH).

Methods

The study consisted of three groups of population (NH, ANSD, and CHL) in the age range of 18–40 years. ACC was recorded for naturally produced CV stimulus /sa/ of 380 ms in duration, which consists consonant (150 ms) and vowel (230 ms) using Biologic Navigator pro 7.2.1.

Results

The result showed significantly prolonged latencies of ACC in individuals with ANSD compared to NH. The current study also showed significantly prolonged latency and significantly lower peak-to-peak amplitude in individuals with ANSD compared to CHL. The interesting finding of the present study was significantly better peak-to-peak amplitude for CHL compared to NH. Whereas, there was no significant difference between NH and CHL for latencies measures.

Conclusion

Poor neural synchronization in individuals with ANSD could be the reason of poor neural representation of CV transition in present study. The outcome of the present study showed poor neural representation of CV transition in individuals with ANSD compared to CHL and NH. Current study also showed better encoding of CV transition in individuals with CHL compared to ANSD.

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Funding

No funding was granted or required for the study.

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Authors and Affiliations

  1. Department of Audiology, All India Institute of Speech and Hearing, Mysore, India

    Prawin Kumar & Niraj Kumar Singh

  2. Department of ENT and Audiology, Shri Jagdamba Charitable Eye Hospital, Sri Ganganagar, Rajasthan, India

    Himanshu Kumar Sanju

Authors
  1. Prawin Kumar
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  2. Himanshu Kumar Sanju
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  3. Niraj Kumar Singh
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Corresponding author

Correspondence to Himanshu Kumar Sanju.

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The authors declare that they have no conflict of interest.

Ethical approval

The study was approved by the ethics committee of All India Institute of Speech and Hearing, Mysore, India and certify that the study was performed in accordance with the ethical standards as laid down in the 1964 Declaration of Helsinki and its later amendments or comparable ethical standards.

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Kumar, P., Sanju, H.K. & Singh, N.K. Neural representation of consonant–vowel transition in individuals with cochlear hearing loss and auditory neuropathy spectrum disorder. Eur Arch Otorhinolaryngol 277, 2739–2744 (2020). https://doi.org/10.1007/s00405-020-06017-4

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  • DOI: https://doi.org/10.1007/s00405-020-06017-4

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