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Related Experiment Videos

Deafness associated with vertebrobasilar insufficiency.

T Yamasoba1, S Kikuchi, R Higo

  • 1Department of Otolaryngology, University of Tokyo, Hongo 7-3-1, Bunkyo, Tokyo 113-8655, Japan. tyamasoba-tky@umin.ac.jp

Journal of the Neurological Sciences
|July 7, 2001
PubMed
Summary

Hearing loss is surprisingly common in vertebrobasilar insufficiency (VBI), affecting about one-fifth of patients. This study reveals that deafness in VBI primarily impacts the cochlea, not central auditory pathways.

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Area of Science:

  • Neurology
  • Otolaryngology
  • Neurotology

Background:

  • Vertebrobasilar insufficiency (VBI) is often associated with vestibular symptoms, but the incidence and characteristics of auditory disturbances remain under-documented.
  • Routine audiological data for VBI patients are scarce, necessitating further investigation into hearing impairment in this population.

Observation:

  • This study examined 70 vertiginous patients diagnosed with VBI.
  • Audiological examinations and magnetic resonance imaging (MRI) were utilized to assess auditory function and identify potential neurological correlates.
  • Symptoms like tinnitus and deafness were reported by 25 patients during vertigo episodes.

Findings:

  • Unilateral deafness was confirmed in 15 (21%) VBI patients through audiological testing.

Related Experiment Videos

  • The cochlea was identified as the primary site of auditory involvement in 14 out of 15 deafened patients.
  • MRI revealed a lacunar infarct in the cochlear nuclei of one patient, but central auditory structures were unaffected in others.

    • Implications:

    • Hearing loss affects approximately 21% of VBI patients, a higher incidence than previously assumed, though less frequent than vestibular issues.
    • The findings highlight the cochlea as the main site of auditory damage in VBI-related deafness.
    • These results underscore the importance of audiological assessment in the comprehensive evaluation of VBI patients.