Geometrical considerations on canal-otolith interactions during OVAR and Bayesian modelling.

Prog Brain Res

Vestibulo-Oculomotor Laboratory, Zürich University Hospital, Frauenklinikstr. 26, CH-8091 Zürich, Switzerland.

Published: January 2009

During constant-velocity rotation about a tilted axis (OVAR), the VOR and the rotation perception last indefinitely, but show a striking dependency on tilt angle. We show that, during OVAR, a variety of motions can account for the head motion relative to gravity. Some of these are in conflict with canal signals, but correspond to a lower angular velocity; we suggest that the brain performs a trade-off in order to select the best motion. We show that this theory explains the effect of tilt angle on velocity estimation during OVAR.

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http://dx.doi.org/10.1016/S0079-6123(08)00641-9DOI Listing

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