Geometrical considerations on canal-otolith interactions during OVAR and Bayesian modelling.
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.
Laurens
Jean
J
Vestibulo-Oculomotor Laboratory, Zürich University Hospital, Frauenklinikstr. 26, CH-8091 Zürich, Switzerland. jean.laurens@gmail.com
Hess
Bernhard J M
BJ
Straumann
Dominik
D
D001499:Bayes Theorem; D019416:Head Movements / Q000502:physiology; D006801:Humans; D008959:Models, Neurological; D009039:Motion Perception / Q000502:physiology; D010037:Otolithic Membrane / Q000502:physiology*; D011434:Proprioception / Q000502:physiology; D012027:Reflex, Vestibulo-Ocular / Q000502:physiology*; D012399:Rotation; D012665:Semicircular Canals / Q000502:physiology*