Abstract
A theory of early visual information processing proposed by Marr and co-workers suggests that simple cortical cells may be involved in the detection of zero crossing in the retinal output. We have tested this theory by using pairs of adjacent edges (staircases stimuli) and recording from edge-specific simple cells in cat striate cortex. The zero crossing hypothesis gives rise for such stimuli to non-obvious predictions that were generally confirmed by the experiment.
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Richter, J., Ullman, S. Non-linearities in cortical simple cells and the possible detection of zero crossings. Biol. Cybern. 53, 195–202 (1986). https://doi.org/10.1007/BF00342887
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DOI: https://doi.org/10.1007/BF00342887