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Off-vertical axis rotation: a test of the otolith-ocular reflexThe vestibulo-ocular reflex was studied via off-vertical axis rotation (OVAR) in the dark. The axis of the turntable could be tilted from vertical by up to 30 degrees. Eye movements were measured with electro-oculography. Results from healthy asymptomatic subjects indicated that 1) a reliable otolith-induced response could be obtained during constant velocity OVAR using a velocity of 60 degrees/s with a tilt of 30 degrees; 2) constant velocity OVAR rotation was nausea-producing and, especially if subjects were rotated in the dark about an earth-vertical axis prior to being tilted, disorienting; and 3) sinusoidal OVAR produced minimal nausea; the eye movement response appeared to be the result of a combination of semicircular canal and otolith components. We conclude that OVAR has the potential of becoming a useful method for clinically assessing both the otolith-ocular reflex and semicircular canal-otolith interaction.
Document ID
20050000630
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Furman, J. M.
(Eye and Ear Institute of Pittsburgh PA 15213)
Schor, R. H.
Schumann, T. L.
Date Acquired
August 22, 2013
Publication Date
August 1, 1992
Publication Information
Publication: The Annals of otology, rhinology, and laryngology
Volume: 101
Issue: 8
ISSN: 0003-4894
Subject Category
Aerospace Medicine
Funding Number(s)
CONTRACT_GRANT: R29DC01317
Distribution Limits
Public
Copyright
Other
Keywords
NASA Discipline Neuroscience
Non-NASA Center

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