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Central auditory maturation and babbling development in infants with cochlear implants.

Anu Sharma1, Emily Tobey, Michael Dorman

  • 1The University of Texas at Dallas, Callier Advanced Hearing Research Center, 75235, USA. anu.sharma@utdallas.edu

Archives of Otolaryngology--Head & Neck Surgery
|May 19, 2004
PubMed
Summary

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Early cochlear implantation in infants with hearing loss rapidly improves auditory pathway function and leads to significant increases in speech-like babbling. This suggests that faster auditory development positively influences early communication skills.

Area of Science:

  • Neuroscience
  • Audiology
  • Developmental Psychology

Background:

  • Central auditory pathway maturation is crucial for speech development.
  • Cochlear implants aim to restore auditory input in deaf infants.
  • Understanding the link between auditory development and babbling is key for early intervention.

Purpose of the Study:

  • To investigate the relationship between central auditory pathway maturation and canonical babbling in infants receiving cochlear implants.
  • To assess the impact of cochlear implantation on auditory evoked potentials and vocalizations.

Main Methods:

  • Compared P1 cortical auditory evoked potential latencies and vocalizations in two congenitally deaf infants before and up to one year after cochlear implantation.
  • Recorded P1 responses to a /ba/ stimulus and audiorecorded vocalizations during caregiver interaction.

Related Experiment Videos

Main Results:

  • P1 latencies normalized within approximately 3 months post-implantation.
  • Vocalizations shifted from precanonical to canonical babbling significantly after 3 months of implant use.

Conclusions:

  • Auditory pathway maturation and early communicative behaviors appear to follow similar developmental trajectories after early cochlear implantation.
  • The rate of neural plasticity in central auditory pathways may positively influence the development of early communication skills in implanted infants.