Ch. 3 Part 2 - Chapter3 Getting a Sense of Your Senses Part...

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Chapter 3 Getting a Sense of Your Senses Part I: Vision
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Trichromatic Theory Cannot Account for Color ________________________!
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Opponent Process (O-P) Theory According to O-P Theory, we perceive colors based on paired opposite “color elements”: Red-Green; Blue-Yellow; Black-White Each element signals one color—for instance red or green—but never both at the same time. When one of the opponent-pairs is no longer stimulated, the other is briefly activated.
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Ganglion Cells and O-P Theory
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Ganglion Cells and O-P Theory Bipolar Cell Activity in this particular bipolar cell encodes a signal for the color blue. Lack of activity encodes the signal for yellow. Output is to the ganglion cell.
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Ganglion Cells and O-P Color Horizontal Cell Bipolar Cell EXCIT. EXCIT. “BLUE” Short wavelength cones (responds optimally to blue light) produces a high rate of activity in the bipolar cell. Output code is “blue” INHIB.
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Ganglion Cells and O-P Color Horizontal Cell Bipolar Cell EXCIT.
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