Non-linear effects in visual suppression of vestibular nystagmus

G. R. Barnes, A. Edge

    Research output: Contribution to journalArticlepeer-review

    Abstract

    Visual-vestibular interaction in the control of eye movement was investigated in six subjects during exposure to a low frequency (0.05 Hz) angular oscillation about the longitudinal axis of the body at four levels of peak head velocity: 30, 60, 90 and 120°/s. Eye movements were recorded whilst the subject was presented with a head-fixed visual display consisting of either a single central target or a pair of targets placed at ±20° in the periphery. For the lower stimulus levels (30 and 60°/s) the degree of suppression was reasonably constant and the vestibular nystagmus was never completely suppressed. However, during oscillation at higher velocity levels (90 and 120°/s) the relationship between eye velocity and head velocity became non-linear, the degree of suppression being much less during the high velocity periods of the waveform than when the head velocity was low. The changes in suppression may be interpreted as a decrease in gain of visual feedback as a function of increasing image velocity error on the retina. © 1983 Springer-Verlag.
    Original languageEnglish
    Pages (from-to)9-19
    Number of pages10
    JournalExperimental brain research
    Volume52
    Issue number1
    DOIs
    Publication statusPublished - Sep 1983

    Keywords

    • Fovea
    • Head-fixed display
    • Peripheral retina
    • Vestibulo-ocular reflex
    • Visual suppression

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