title: An analysis of ocular counterrolling in response to body positions in three-dimensional space.
abstract: Four normal subjects underwent ocular counterrolling testing in a tiltable chair. Measurements were taken in 62 different body positions in steps of 30 degrees varied rolls and pitches. In each body position the eyes were recorded on video and their roll angle was determined automatically by computer analysis. The ocular counterrolling profile showed a periodic characteristic with maximal amplitude at roll tilts of 60 degrees. In this study we can clearly show that the eyes' rolling response is not systematically affected when lateral body tilts are combined with any tilts in the pitch direction. This undoubtedly implies that the ocular counterrolling was mainly stimulated by the subject's roll angle. As an empirical contribution, this study provides new data specially to be used in modelling and simulating the function of otolith organs.
authors.affiliation: NASA Ames Research Center, Human Factors Research Division, Moffett Field, California 94035-1000.
authors.forename: U J
authors.initials: UJ
authors.lastname: Bucher
authors.forename: F
authors.initials: F
authors.lastname: Mast
authors.forename: N
authors.initials: N
authors.lastname: Bischof
mesh_terms: D000328:Adult; D005133:Eye Movements / Q000502:physiology*; D005260:Female; D006801:Humans; D008297:Male; D009068:Movement; D011187:Posture / Q000502:physiology*; D012399:Rotation; D013028:Space Perception