AUTHOR=Tarnutzer Alexander A., Shaikh Aasef G., Palla Antonella , Straumann Dominik , Marti Sarah TITLE=Vestibulo-Cerebellar Disease Impairs the Central Representation of Self-Orientation JOURNAL=Frontiers in Neurology VOLUME=2 YEAR=2011 URL=https://www.frontiersin.org/journals/neurology/articles/10.3389/fneur.2011.00011 DOI=10.3389/fneur.2011.00011 ISSN=1664-2295 ABSTRACT=
Transformation of head-fixed otolith signals into a space-fixed frame of reference is essential for perception of self-orientation and ocular motor control. In monkeys the nodulus and ventral uvula of the vestibulo-cerebellum facilitate this transformation by computing an internal estimate of direction of gravity. These experimental findings motivated the hypothesis that degeneration of the vestibulo-cerebellum in humans alter perceptual and ocular motor functions that rely on accurate estimates of gravity, such as subjective visual vertical (SVV), static ocular counterroll (OCR), and gravity-dependent modulation of vertical ocular drifts. We assessed the SVV, OCR, and spontaneous vertical ocular drifts in 12 patients with chronic vestibulo-cerebellar disease and in 10 controls. Substantially increased variability in estimated SVV was noted in the patients. Furthermore, gravity-dependent modulation of spontaneous vertical ocular drifts along the pitch plane was significantly (