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BrainResearch,543(1991)347-350 @)1991ElsevierSciencePublishersB.V. (BiomedicalDivision)0006-8993/91/$03.50

Summary: BrainResearch,543(1991)347-350
@)1991ElsevierSciencePublishersB.V. (BiomedicalDivision)0006-8993/91/$03.50
ADONrS 000689939124s60X
Thevestibulo-ocularreflexin the cat duringlinearaccelerationin the
Dora E. Angelaki andJohnH. Anderson
Departnents of Otolaryngolog and Physialogy, University of Mitnesota, Minneapolis, MN 55455(U.S.A.)
(Accepted 4 December 1990)
Key words..Vestibulo-ocular reflex; Linear acceleratiotr;Visual suppression;Vestibu.larsystem; Eye movement
The horizontal alrd vertical componentsof the v$dbulo-ocular rcflex (VOR) were recorded in ale.t cats that werc rotated with their head
placed on or 45 cm eccenhic ftom the axis of rotation. During off-axis rotation there was a centdpeta.l acceleration alotrg the animal's
naso-occipitalaxis that changedthe direction and the magnitudeof the resultant otolith force in the animal's sagittal plane. When the animal
wasup ght and eccentricfrom the axis of rotation, the horizontal VOR (HVOR) had a shorter time constatrtand smaller amplitude compared
to the oo-axis lfVOR. The effect was symmetrical for both directions of the naso-occipital linear accelemtion, When the animal was otr its
sideand faced awayfrom the axisof rotatioo, there wasa decreasein the time constantof the down VOR. When the animal faced the opposite
direction, the down VOR time constant was incieasd. No statistically significant effect was found oo the amplitude of the WOR and the
time constant of the uD VOR.


Source: Angelaki, Dora - Department of Anatomy and Neurobiology, Washington University in St. Louis


Collections: Biology and Medicine