PSYC 211 Lecture Notes - Lecture 21: Microelectrode, Cone Cell, Receptive Field
16 Mar 2017
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Document Summary
The trichromatic theory of color vision (young-helmholtz theory) color perception is a function of the relative rates of response by three types of cone receptors, each sensitive to a different set of wavelengths. People can match any color by mixing appropriate amounts of three wavelengths. Each cone cell is sensitive to short (blue), medium (green) or long (red) wavelengths. Wavelengths are discriminated by the ratio of activity across the three types of cones. Cannot explain; why we have negative afterimages or why we see blends of colors. We perceive color in terms of paired opposites there are 3 pairs: red vs. green, yellow vs. blue, black vs. white the bipolar cell is excited by the blue light but inhibited by red, green and yellow. An increase in the bipolar cells activity leads to a blue experience but a decrease produces a.
