The dynamics of spatial orientation during complex and changing linear and angular acceleration

TitleThe dynamics of spatial orientation during complex and changing linear and angular acceleration
Publication TypeJournal Article
Year of Publication1992
AuthorsGuedry, F. E., A. H. Rupert, B. J. McGrath, and C. M. Oman
JournalJ Vestib Res
Volume2
Pagination259-283
Date PublishedWinter
MVL Report Number92.36
Keywords*Acceleration, *Orientation, Adult, Female, Gravitation, Human, Male, Movement, Posture/physiology, Reflex, Vestibulo-Ocular/*physiology, Space Perception/*physiology, Visual perception
Abstract

The dynamics of spatial orientation perception were examined in a series of experiments in which a total of 43 subjects were passively exposed to various combinations of linear and angular acceleration during centrifuge runs. Perceptual effects during deceleration were much stronger than effects during acceleration. The dynamics of spatial orientation perception differed substantially from changes in the vestibulo-ocular reflex (VOR). VOR was fairly well predicted by a current model, but our experiments revealed perceived change in attitude (roll, pitch, yaw tilt position in space) and perceived angular velocity in space that was not reflected by parallel changes in the plane or magnitude of the VOR. This series of experiments establishes several facts concerning spatial orientation perception beyond the predictive domain of any current model. New concepts are needed and several are suggested to deal with changing reactions to complex combinations of linear and angular accelerations.