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Suppression from a contrast-reversing mask grating (same format as Fig. 2), simulating the experiment of Morrone et al. (1982). A, Mask stimulus, a contrast-reversing (4 Hz) grating with orientation orthogonal to that preferred by the model V1 neuron. B, Test stimulus, a drifting one-dimensional noise pattern with optimal orientation and speed for the model V1 neuron. C, Superposition of test and mask.
