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Relation between perception of vertical axis rotation and vestibulo-ocular reflex symmetry
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Peterka, Robert J. Benolken, Martha S. |
| Copyright Year | 1991 |
| Description | Subjects seated in a vertical axis rotation chair controlled their rotational velocity by adjusting a potentiometer. Their goal was to null out pseudorandom rotational perturbations in order to remain perceptually stationary. Most subjects showed a slow linear drift of velocity (a constant acceleration) to one side when they were deprived of an earth-fixed visual reference. The amplitude and direction of this drift can be considered a measure of a static bias in the subject's perception of rotation. The presence of a perceptual bias is consistent with a small, constant imbalance of vestibular function which could be of either central or peripheral origin. Deviations from perfect vestibulocular reflex (VOR) symmetry are also assumed to be related to imbalances in either peripheral or central vestibular function. Researchers looked for correlations between perceptual bias and various measures of vestibular reflex symmetry that might suggest a common source for both reflective and perceptual imbalances. No correlations were found. Measurement errors could not account for these results since repeated tests on the same subjects of both perceptual bias and VOR symmetry were well correlated. |
| File Size | 1034326 |
| Page Count | 21 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19910010397 |
| Archival Resource Key | ark:/13960/t5fb9zw1s |
| Language | English |
| Publisher Date | 1991-03-20 |
| Access Restriction | Open |
| Subject Keyword | Aerospace Medicine Vestibular Tests Correlation Bias Drift Rate Perturbation Rotation Earth Planet Symmetry Visual Perception Perceptual Errors Reflexes Seats Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
