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- Title
Motion defined exclusively by second-order characteristics does not evoke optokinetic nystagmus.
- Authors
Harri, Laurence R.; Smith, Andrew T.
- Abstract
We showed high-contrast, second-order motion stimuli to subjects whilst recording their horizontal eye movements. These stimuli were very poor at evoking optokinetic nystagmus. Smooth-pursuit eye movements and fixation were reduced by a masking band ±2.5 deg above and below an imaginary fixation point. First-order stimuli evoked vigorous optokinetic nystagmus (OKN) under identical conditions and also when matched for apparent contrast. These findings are discussed in terms of the site of detection of second-order motion.
- Publication
Visual Neuroscience, 1992, Vol 9, Issue 6, p565
- ISSN
0952-5238
- Publication type
Article
- DOI
10.1017/S0952523800001802