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Related Concept Videos

The Cochlea01:13

The Cochlea

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The cochlea is a coiled structure in the inner ear that contains hair cells—the sensory receptors of the auditory system. Sound waves are transmitted to the cochlea by small bones attached to the eardrum called the ossicles, which vibrate the oval window that leads to the inner ear. This causes fluid in the chambers of the cochlea to move, vibrating the basilar membrane.
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Auditory Pathway01:15

Auditory Pathway

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Auditory pathways constitute the complex neural circuits responsible for transmitting and interpreting auditory information from the peripheral auditory system to the brain. Sound waves are initially captured by the outer ear, funneled through the ear canal, and reach the tympanic membrane (eardrum). These vibrations are transmitted via the middle ear's ossicles to the inner ear's cochlea.
When viewed cross-sectionally, the cochlea reveals the scala vestibuli and scala tympani flanking...
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Systematic Hearing Performance Evaluation Process for Adolescents with Cochlear Implantation at Early Ages
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Systematic Hearing Performance Evaluation Process for Adolescents with Cochlear Implantation at Early Ages

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Auditory cortical maturation in children with sequential bilateral cochlear implants.

Marloes Sparreboom1, Andy J Beynon, Ad F M Snik

  • 1Department of Otorhinolaryngology, Head and Neck Surgery, Hearing and Implants, Donders Institute for Brain, Cognition and Behaviour, Radboud University Nijmegen Medical Centre, Nijmegen, The Netherlands.

Otology & Neurotology : Official Publication of the American Otological Society, American Neurotology Society [And] European Academy of Otology and Neurotology
|December 17, 2013
PubMed
Summary
This summary is machine-generated.

Sequential bilateral cochlear implantation aids auditory cortical maturation, but responses from the second implant lag behind the first. Extended delays between implants may hinder auditory development.

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Area of Science:

  • Neuroscience
  • Audiology
  • Pediatrics

Background:

  • Sequential bilateral cochlear implantation (SBI) is increasingly used for prelingually deaf children.
  • Understanding its impact on auditory cortical maturation is crucial for optimizing device use.

Purpose of the Study:

  • To evaluate the effect of sequential bilateral cochlear implantation on auditory cortical maturation.
  • To assess maturation after varying durations of unilateral cochlear implant use.

Main Methods:

  • Prospective cohort study involving 30 prelingually deaf children undergoing sequential bilateral cochlear implantation.
  • Electrically evoked auditory cortical response (EACR) measured at 12 and 24 months post-implantation.
  • Comparison of P1/N2 latencies and RMS amplitudes between first and second implants, and with normal-hearing children.

Main Results:

  • EACR latencies decreased over time for both implants.
  • Responses from the second implant showed significantly smaller RMS amplitudes and prolonged P1 latencies compared to the first implant at 24 months.
  • Longer delays between implants adversely affected RMS amplitudes and waveform morphology.

Conclusions:

  • Auditory cortical maturation occurs with sequential bilateral cochlear implantation, even after prolonged unilateral use.
  • Responses from the second implant remain less mature than the first, particularly with longer interimplant delays.
  • The long-term auditory cortical development and potential for equalization between implants require further investigation.