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      Relating cone signals to color appearance: failure of monotonicity in yellow/blue.

      Visual Neuroscience
      Color Perception, physiology, Female, Humans, Male, Neurons, Retinal Cone Photoreceptor Cells, Vision, Ocular

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          Abstract

          Observers performed red-green and yellow-blue hue cancellation tasks for a 0.8-deg circular test field on a dark surround, by manipulating the excitation level of one cone class while the other two classes were held constant. The results of the red-green judgments conformed to classical opponent color theory in that both L- and S-cone excitation levels were antagonistic to M-cone signals. The yellow-blue judgments revealed a nonmonotonic nonlinearity in which the S-cone signal could act either antagonistically or synergistically with M- and L-cone signals. These results demonstrate that fixed hue sensations should not be associated with a given class of cone, even at the level of opponent neural coding.

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          Author and article information

          Journal
          12020080

          Chemistry
          Color Perception,physiology,Female,Humans,Male,Neurons,Retinal Cone Photoreceptor Cells,Vision, Ocular

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