Torsional Eye velocity components during yaw angular acceleration identify the side of unilateral vestibular deafferentation

T. Haslwanter, I. S. Curthoys, G. M. Halmagyi, R. A. Black, A. N. Topple, M. J. Todd

Research output: Contribution to journalArticlepeer-review

Abstract

Using dual torsion scleral search coils we have recorded 3-dimensional eye position during yaw angular accelerations of 20°s2 about an earth vertical axis in healthy subjects and in patients with unilateral vestibular deafferentation (UVD). These experiments produced two interesting results: i) even in healthy subjects, the axis of eye velocity did not coincide with the (earth vertical) stimulus axis during centred rotation; ii) Patients with UVD had torsional eye velocity components that were systematically different from those in normal subjects. While in normals the direction of the torsional component of the eye velocity depended on the direction of rotation and was on average approximately symmetric for CW and CCW yaw rotation, there was a clear asymmetry in patients, which was distinctly different for left and right UVD.

Original languageEnglish
Pages (from-to)62-64
Number of pages3
JournalActa Oto-Laryngologica
Volume520 Pt 1
Issue numberS520
DOIs
Publication statusPublished - 1995
Externally publishedYes

Keywords

  • Deafferentation
  • Humuns
  • Oculomotor
  • Vestibular
  • Dominance, Cerebral/physiology
  • Humans
  • Reference Values
  • Rotation
  • Eye Movements/physiology
  • Vestibular Nerve/physiopathology
  • Afferent Pathways/physiopathology
  • Postural Balance/physiology
  • Vestibular Function Tests
  • Postoperative Complications/physiopathology
  • Acceleration
  • Orientation/physiology

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