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The human ocular torsion position response during yaw angular acceleration


Smith, ST and Curthoys, IS and Moore, ST, The human ocular torsion position response during yaw angular acceleration, Vision Research: An International Journal for Functional Aspects of Vision, 35, (14) pp. 2045-2055. ISSN 0042-6989 (1995) [Refereed Article]

DOI: doi:10.1016/0042-6989(94)00290-3


Recent results by Wearne [(1993) Ph.D. thesis] using the scleral search-coil method of measuring eye position indicate that changes in ocular torsion position (OTP) occur during yaw angular acceleration about an earth vertical axis. The present set of experiments, using an image processing method of eye movement measurement free from the possible confound of search coil slippage, demonstrates the generality and repeatability of this phenomenon and examines its possible causes. The change in torsion position is not a linear vestibulo-ocular reflex (LVOR) response to interaural linear acceleration stimulation of the otoliths, but rather the effect is dependent on the characteristics of the angular acceleration stimulus, commencing at the onset and decaying at the offset of the angular acceleration. In the experiments reported here, the magnitude of the angular acceleration stimulus was varied and the torsion position response showed corresponding variations. We consider that the change in torsion position observed during angular acceleration is most likely to be due to activity of the semicircular canals.

Item Details

Item Type:Refereed Article
Keywords:Torsion; Otolith; Semicircular canal; Angular acceleration; Linear acceleration; Integrator
Research Division:Biomedical and Clinical Sciences
Research Group:Ophthalmology and optometry
Research Field:Vision science
Objective Division:Health
Objective Group:Other health
Objective Field:Other health not elsewhere classified
UTAS Author:Smith, ST (Associate Professor Stuart Smith)
ID Code:85689
Year Published:1995
Web of Science® Times Cited:23
Deposited By:Health Sciences A
Deposited On:2013-07-30
Last Modified:2013-07-30

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