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Postural control and vestibular function in patients selected for cochlear implantation

M Magnusson1, H Petersen, S Harris

  • 1Department of Oto-Rhino-Laryngology, University Hospital of Lund, Sweden.

Acta Oto-Laryngologica. Supplementum
|January 1, 1995
PubMed
Summary

Post-lingually deaf patients showed increased sway when their calf muscles were vibrated before cochlear implantation. Vestibular nerve stimulation did not differ from controls, suggesting sensitivity to electrical stimulation.

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Area of Science:

  • Neuroscience
  • Audiology
  • Vestibular System

Background:

  • Postural control is crucial for balance.
  • Vestibular and eye motor function are interconnected.
  • Cochlear implantation can affect sensory processing.

Purpose of the Study:

  • To evaluate postural control in post-lingually deaf patients before cochlear implantation.
  • To assess the impact of vestibular stimulation on stance.
  • To explore potential causes of dizziness in cochlear implant patients.

Main Methods:

  • Assessed postural control using vibration and galvanic electrical stimulation.
  • Compared 7 post-lingually deaf patients with 21 control subjects.
  • Measured bodysway in response to perturbations.

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Main Results:

  • Patients exhibited increased vibration-induced bodysway compared to controls.
  • Galvanic vestibular stimulation did not significantly alter bodysway in patients versus controls.
  • Suggests reduced postural control in patients, but preserved vestibular nerve sensitivity.

Conclusions:

  • Post-lingually deaf individuals may have underlying postural control deficits.
  • Vestibular nerve sensitivity to electrical stimulation is present despite reduced postural control.
  • Findings offer a hypothesis for dizziness experienced by some cochlear implant recipients.