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Updated: May 12, 2026
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Assessment of Static Graviceptive Perception in the Roll-Plane using the Subjective Visual Vertical Paradigm
Published on: April 28, 2020
Virtual reality-based visual vertical perception, fall risk, and vestibulo-ocular reflex evaluation in obstructive
Gamze Nas Özütemiz1, Alper Köycü2, Ayşe Elif Küpeli3
1Department of Audiology, Baskent University, Ankara, Turkey.
Summary
Obstructive sleep apnea syndrome (OSAS) increases fall risk and can impair functional vestibular function, even with normal objective tests. Comprehensive assessment is crucial for individuals with OSAS.
Area of Science:
- Neurology
- Otolaryngology
- Sleep Medicine
Background:
- Obstructive sleep apnea syndrome (OSAS) involves intermittent hypoxia and oxygen desaturation.
- These physiological changes may negatively impact vestibular system function.
Purpose of the Study:
- To comprehensively evaluate vestibular function in OSAS patients.
- Assess objective and functional vestibulo-ocular reflex (VOR), visual perception, and fall risk.
Main Methods:
- Utilized Video Head Impulse Test (vHIT), functional Head Impulse Test (fHIT), and Tinetti Balance and Gait Test.
- Administered static and dynamic subjective visual vertical/horizontal tests.
- Compared moderate OSAS, severe OSAS, and healthy control groups.
Main Results:
- Both OSAS groups exhibited significantly increased fall risk compared to controls.
- Severe OSAS showed impaired dynamic visual perception and functional VOR performance.
- vHIT gains were comparable across all groups; Tinetti scores correlated with fHIT performance.
Conclusions:
- Increased fall risk is a key finding in OSAS.
- Functional VOR deficits can exist despite normal vHIT, indicating central vestibular processing involvement.
- Comprehensive vestibular assessment is essential for managing OSAS patients.
