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Electrically Evoked Stapedius Reflex Measurements in Cochlear Implantation and Its Application in the Postoperative Fitting Process
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Static balance function in children with cochlear implants.

Ming-Wei Huang1, Chuan-Jen Hsu, Chen-Chieh Kuan

  • 1Department of Otolaryngology, Taipei Hospital, Department of Health, The Executive Yuan, Taipei, Taiwan.

International Journal of Pediatric Otorhinolaryngology
|March 23, 2011
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Summary

Deaf adolescents with cochlear implants show poorer static balance than hearing peers, especially when visual and sensory input is limited. Implant use did not significantly affect balance outcomes.

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Area of Science:

  • Audiology
  • Neuroscience
  • Biomedical Engineering

Background:

  • Static balance is crucial for daily activities.
  • Cochlear implants (CIs) restore hearing but their impact on balance is not fully understood.
  • Adolescents with CIs may experience altered sensory processing affecting postural control.

Purpose of the Study:

  • To evaluate static balance function in deaf adolescents with long-term unilateral cochlear implant use.
  • To compare the balance performance of CI users with age-matched normal-hearing peers.
  • To determine if CI activation influences postural stability.

Main Methods:

  • Stabilometry testing was performed on 24 adolescents with unilateral CIs (≥5 years post-implantation) and 24 normal-hearing controls.
  • Testing involved four conditions: firm/foam surfaces with eyes open/closed.
  • Balance parameters (sway velocity, circular area) were measured with CI on and off.

Main Results:

  • CI users exhibited significantly worse static balance than controls under conditions with intact vision and firm surface, and both visual and somatosensory disruption (p<0.05).
  • Balance deficits were most pronounced in CI users when both visual and somatosensory input were challenged (foam pad, eyes closed).
  • No significant difference in postural stability was observed between CI users with their device activated versus deactivated.

Conclusions:

  • Adolescents with long-term cochlear implant use demonstrate impaired static balance compared to their normal-hearing counterparts.
  • The degree of balance impairment is exacerbated by the combined loss of visual and somatosensory cues.
  • Postural stability in these adolescents is independent of cochlear implant activation status.