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Related Experiment Videos

Vestibular dysfunction in noise induced hearing loss

Y Manabe1, T Kurokawa, T Saito

  • 1Department of Otorlaryngology, Fukui Medical School, Japan.

Acta Oto-Laryngologica. Supplementum
|January 1, 1995
PubMed
Summary
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Loud noise can harm hearing and balance. This study found that noise-induced hearing loss patients with vertigo showed higher electrocochleogram indicators, suggesting a link to Meniere

Area of Science:

  • Otolaryngology
  • Neuroscience
  • Audiology

Background:

  • Loud sounds primarily damage the cochlea, but vestibular system involvement is less understood.
  • Patients with noise-induced hearing loss (NIHL) may experience balance disorders and Meniere's-like symptoms.
  • The relationship between acoustic trauma and vestibular dysfunction warrants further investigation.

Purpose of the Study:

  • To investigate the association between exposure to loud sounds and vestibular system problems in NIHL patients.
  • To explore potential pathophysiological mechanisms linking noise exposure to vertigo.

Main Methods:

  • Thirty-six NIHL patients were categorized into vertigo and non-vertigo groups.
  • Pure tone audiometry and electrocochleography (ECoG) were performed on all subjects.

Related Experiment Videos

  • Caloric testing was conducted on patients in the vertigo group.

    • Main Results:

    • A significantly higher summating potential (SP)/action potential (AP) ratio was observed in the vertigo group compared to the non-vertigo group.
    • The SP/AP ratio is considered an indicator of endolymphatic hydrops.
    • Reduced vestibular response was noted in 47.1% of ears tested with caloric stimulation in the vertigo group.

    Conclusions:

    • Episodic vertigo in NIHL patients may stem from endolymphatic hydrops, a mechanism similar to Meniere's disease.
    • Vestibular dysfunction is a notable comorbidity in noise-induced hearing loss.
    • ECoG and caloric tests are valuable in assessing vestibular involvement in NIHL.