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Related Experiment Video

Updated: Sep 25, 2025

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Isolated Otolith Dysfunction in Persistent Postural-Perceptual Dizziness.

Toshihisa Murofushi1, Koji Nishimura1, Masahito Tsubota1,2

  • 1Department of Otolaryngology, Teikyo University School of Medicine, Mizonokuchi Hospital, Kawasaki, Japan.

Frontiers in Neurology
|April 28, 2022
PubMed
Summary

Persistent postural-perceptual dizziness (PPPD) is often linked to otolith dysfunction, particularly isolated forms. This study found most PPPD patients exhibit otolith issues, suggesting a role in symptom initiation.

Keywords:
DHINPQPPPDVEMPidiopathic otolithic vertigoisolated otolith dysfunctionvHIT

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Area of Science:

  • Neuroscience
  • Otolaryngology
  • Vestibular System Disorders

Background:

  • Persistent postural-perceptual dizziness (PPPD) is a chronic condition affecting balance and daily life.
  • The role of otolith dysfunction, specifically isolated forms, in PPPD remains incompletely understood.
  • Understanding the vestibular system's contribution is crucial for effective PPPD management.

Purpose of the Study:

  • To investigate the prevalence and characteristics of otolith dysfunction in patients diagnosed with PPPD.
  • To differentiate between isolated otolith dysfunction and combined otolith and semicircular canal dysfunction in PPPD.
  • To explore potential precipitating factors for PPPD, including vestibular neuritis and idiopathic otolithic vertigo.

Main Methods:

  • Twenty-one PPPD patients completed the Dizziness Handicap Inventory (DHI) and Niigata PPPD Questionnaire (NPQ).
  • Vestibular function was assessed using vestibular evoked myogenic potential (VEMP) tests and video head-impulse tests (vHIT).
  • Stabilometry was employed to evaluate postural control, with comparisons to healthy subject data.

Main Results:

  • Nine out of 21 PPPD patients showed isolated otolith dysfunction.
  • Four patients had combined otolith and semicircular canal dysfunction; two had isolated semicircular canal dysfunction.
  • PPPD patients demonstrated significantly impaired stabilometry compared to healthy controls, irrespective of specific vestibular findings.

Conclusions:

  • The majority of PPPD patients exhibit otolith dysfunction, frequently in isolation.
  • Idiopathic otolithic vertigo is identified as a potential precipitating factor for PPPD.
  • While otolith dysfunction may initiate PPPD, broader sensory processing system involvement is likely.