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Sonovestibular symptoms evaluated by computed dynamic posturography.

C B Teszler1, J Ben-David, L Podoshin

  • 1Department of Otolaryngology-Head and Neck Surgery, Faculty of Medicine, Bnai-Zion Medical Center, Technion, Haifa, Israel.

The International Tinnitus Journal
|December 24, 2003
PubMed
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The Tullio phenomenon, causing sound-induced dizziness, can be objectively measured using computed dynamic posturography (CDP) with acoustic stimulation. This method accurately identifies balance issues in patients with inner ear disorders exposed to noise.

Area of Science:

  • Neuroscience
  • Audiology
  • Vestibular System

Background:

  • The Tullio phenomenon, characterized by sound-induced vertigo, traditionally presents as nystagmus but can manifest as postural instability.
  • Real-world noisy environments, such as industrial or aviation settings, can exacerbate vestibular dysfunction.
  • Computed dynamic posturography (CDP) offers a method to objectively assess balance under controlled conditions.

Purpose of the Study:

  • To investigate the utility of CDP with bilateral acoustic stimulation in evaluating the Tullio phenomenon.
  • To determine if acoustic stimulation during CDP can objectively identify postural unsteadiness in patients with sonovestibular symptoms.

Main Methods:

  • Three groups were studied: patients with sonovestibular symptoms (Group A), neurootological patients without (Group B), and healthy controls (Group C).

Related Experiment Videos

  • A 1000 Hz, 110 dB pure-tone stimulus was applied binaurally during specific conditions of the CDP sensory organization test (SOT).
  • Postural stability was assessed via composite equilibrium scores and vestibular ratio scores before, during, and after acoustic stimulation.

    • Main Results:

    • Group A patients exhibited a significant drop in composite equilibrium scores during acoustic stimulation (p < .0001), which persisted even after a 20-minute recovery period.
    • A significant decrease in the vestibular ratio score was also observed in Group A upon sound stimulation (p < .004).
    • Groups B and C showed no significant changes in equilibrium or vestibular scores, indicating the specificity of the response to the Tullio phenomenon.

    Conclusions:

    • CDP with acoustic stimulation is a sensitive and objective method for validating the Tullio phenomenon.
    • This technique can identify patients at risk of noise-induced instability, particularly those with inner ear disorders, chronic noise exposure, or acoustic trauma.
    • Objective assessment via CDP with acoustic stimulation is recommended before individuals with sonovestibular symptoms continue activities in noisy environments to prevent dangerous balance loss.