Central neural mechanisms for detecting second-order motion. |
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Authors: | C L Baker |
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Institution: | McGill Vision Research Unit, Department of Ophthalmology, McGill University, 687 Pine Ave W, H4-14, Montreal, Quebec, Canada H3A 1A1,. curtis@astra.vision.mcgill.ca |
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Abstract: | Single-unit neurophysiology and human psychophysics have begun to reveal distinct neural mechanisms for processing visual stimuli defined by differences in contrast or texture (second-order motion) rather than by luminance (first-order motion). This processing begins in early visual cortical areas, with subsequent extrastriate specialization, and may provide a basis for form-cue invariant analyses of image structure, such as figure-ground segregation and detection of illusory contours. |
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