Postural Sway and the Amplitude of Horizontal Eye Movements |
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| Authors: | M Russell Giveans Ken Yoshida Benoît Bardy Michael Riley Thomas A Stoffregen |
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| Institution: | 1. School of Kinesiology, University of Minnesota;2. EuroMov, University of Montpellier-1;3. Department of Psychology , University of Cincinnati;4. Affordance Perception-Action Laboratory , University of Minnesota |
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| Abstract: | In 2 experiments, we evaluated relations between postural activity and the amplitude of visually guided eye movements. Participants shifted their gaze to follow horizontal oscillation of a visible target. The target moved with amplitude 9° or 24°. In different experiments, the frequency of target oscillation was 0.5 Hz or 1.1 Hz. In both experiments, the variability of head and torso motion was reduced (in the anterior-posterior axis) when participants viewed moving targets, relative to sway during viewing of stationary targets. Sway variability was not influenced by the amplitude of target motion. The results are compatible with the hypothesis that postural activity was modulated relative to the demands of suprapostural visual tasks. |
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