Multiple local motions must be combined to determine the direction of object motion, which is harder than it seems. A new paper proposes an elegant and simple solution to this problem, eminently realizable in feed-forward circuits.
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Zhang, T., Britten, K. The virtue of simplicity. Nat Neurosci 9, 1356–1357 (2006). https://doi.org/10.1038/nn1106-1356
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DOI: https://doi.org/10.1038/nn1106-1356