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Related Experiment Videos

Recovery from bilateral vestibular failure: implications for visual and cervico-ocular function

A M Bronstein1, A B Morland, K H Ruddock

  • 1MRC HMBU, National Hospital, London, England.

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

A patient with severe vestibular loss from meningitis showed significant recovery. The cervico-ocular reflex (COR) and visual function improved, suggesting vestibular signals influence COR and oscillopsia severity.

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Area of Science:

  • Neuroscience
  • Ophthalmology
  • Otorhinolaryngology

Background:

  • Bilateral labyrinthine lesions can cause severe vestibular dysfunction.
  • Streptococcus suis meningitis is a rare but serious cause of neurological complications.
  • Understanding vestibular compensation mechanisms is crucial for patient rehabilitation.

Purpose of the Study:

  • To investigate the cervico-ocular reflex (COR) and spatial visual function in a patient with recovering vestibular function.
  • To explore the relationship between vestibular system activity and visual-motor control.
  • To elucidate the contributing factors to oscillopsia in acute vestibular loss.

Main Methods:

  • Case study of a patient with Streptococcus suis meningitis and bilateral labyrinthine lesions.

Related Experiment Videos

  • Assessment of slow-phase COR during trunk oscillation.
  • Measurement of spatial visual function during whole-body and visual target motion.
  • Evaluation of vestibular ocular reflex (VOR) in the dark and during optic fixation.

    • Main Results:

    • COR gain was initially negligible, increased after one month, and decreased with vestibular recovery.
    • Spatial visual function significantly improved over seven months, correlating with VOR.
    • In the acute stage, eye movement gain and visual function were poorer during whole-body motion compared to visual target motion.

    Conclusions:

    • The cervico-ocular reflex (COR) may be modulated or inhibited by vestibular signals.
    • Spatial vision measurements accurately assess visual blur during head motion.
    • Severe oscillopsia in acute vestibular loss may involve factors beyond VOR absence, including impaired eye movements due to distorted vestibular input.