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Related Experiment Video

Updated: May 22, 2026

Assessment of Static Graviceptive Perception in the Roll-Plane using the Subjective Visual Vertical Paradigm
06:30

Assessment of Static Graviceptive Perception in the Roll-Plane using the Subjective Visual Vertical Paradigm

Published on: April 28, 2020

The under-compensatory roll aVOR does not affect dynamic visual acuity.

Michael C Schubert1, Americo A Migliaccio, Tammy W C Ng

  • 1Department of Otolaryngology Head and Neck Surgery, Johns Hopkins School of Medicine, 601 N. Caroline St, Baltimore, MD, 21287-0910, USA. mschube1@jhmi.edu

Journal of the Association for Research in Otolaryngology : JARO
|April 25, 2012
PubMed
Summary
This summary is machine-generated.

The angular vestibulo-ocular reflex (aVOR) gain varies by head rotation plane in humans. This study found dynamic visual acuity (DVA) is unaffected by head rotation plane in healthy individuals but is a better indicator of gaze instability in unilateral vestibular hypofunction patients during yaw rotations.

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Published on: August 22, 2025

Area of Science:

  • Neuroscience
  • Ophthalmology
  • Vestibular System

Background:

  • The angular vestibulo-ocular reflex (aVOR) stabilizes vision during head movements.
  • aVOR gain differs across head rotation planes (pitch, yaw, roll) in healthy humans.
  • The impact of this gain discrepancy on dynamic visual acuity (DVA) is not fully understood.

Purpose of the Study:

  • To investigate if the differing aVOR gains across head rotation planes affect DVA.
  • To compare DVA and aVOR gain in healthy controls and patients with unilateral vestibular hypofunction (UVH).

Main Methods:

  • Used scleral search coil technique to measure eye and head velocity.
  • Conducted passive dynamic visual acuity (DVA) testing during yaw, roll, and pitch head impulses.
  • Recruited healthy controls and patients with UVH.

Main Results:

  • Healthy subjects showed lower aVOR gain during roll but no difference in DVA across planes.
  • UVH patients exhibited asymmetric aVOR gain and DVA primarily during yaw rotations.
  • DVA was better during ipsilesional roll than yaw in UVH patients, despite lower roll aVOR gain.

Conclusions:

  • DVA is not significantly affected by head rotation plane in healthy individuals.
  • Yaw head rotation DVA asymmetry is a sensitive indicator of gaze instability in UVH.
  • Roll head rotation DVA may offer insights into vestibular function, even with reduced aVOR gain.