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Updated: Feb 17, 2026
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Using Unidirectional Rotations to Improve Vestibular System Asymmetry in Patients with Vestibular Dysfunction
Published on: August 30, 2019
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Clinical features of otolith organ-specific vestibular dysfunction
Chisato Fujimoto1, Sayaka Suzuki1, Makoto Kinoshita1
1Department of Otolaryngology and Head and Neck Surgery, Graduate School of Medicine, The University of Tokyo 7-3-1, Hongo, Bunkyo-ku, Tokyo 113-8655, Japan.
Summary
Otolith organ dysfunction, often presenting as recurrent rotatory vertigo, was identified in patients with normal semicircular canal function. Benign paroxysmal positional vertigo was the most frequent diagnosis in these cases.
Area of Science:
- Otolaryngology
- Neuroscience
- Vestibular System
Background:
- Vestibular disorders significantly impact balance and quality of life.
- Differentiating between semicircular canal and otolith organ dysfunction is crucial for accurate diagnosis.
- Otolith organs (utricle and saccule) play a key role in detecting linear acceleration and head position.
Purpose of the Study:
- To identify clinical features and vestibular symptoms in patients with otolith organ dysfunction.
- To investigate cases where semicircular canal function is normal but otolith function is impaired.
Main Methods:
- Retrospective review of 277 new patients with balance disorders.
- Assessment included cervical and ocular vestibular evoked myogenic potentials (cVEMPs and oVEMPs), caloric testing, and video head impulse testing (vHIT).
- Patients with normal caloric and vHIT results but abnormal cVEMP/oVEMP responses were analyzed.
Main Results:
- 76 patients (27.4%) had normal semicircular canal function but abnormal otolith responses.
- Benign paroxysmal positional vertigo (BPPV) was the most common diagnosis (40 patients).
- 37% of patients remained undiagnosed, often presenting with recurrent rotatory vertigo, and without sensorineural hearing loss.
Conclusions:
- Otolith organ dysfunction, particularly BPPV, is a significant cause of vertigo even with normal semicircular canal function.
- A substantial portion of patients with vertigo may have undiagnosed otolith dysfunction.
- Recurrent rotatory vertigo can be a key symptom of isolated otolith organ impairment.
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