PSYCH 1XX3 Chapter Notes - Chapter 8.4.3: Trichromacy, Ganglion Cell, Retina
3 Mar 2017
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Module 8. 4. 3 colour perception (both theories & colour perception) It turns out that both of these theories are needed to explain colour perception. The response of these receptors differentially affect what is happening further done the line in the brain, where things are organized as the opponent-process theory would have predicted. Retinal cones excite and inhibit ganglion cells to affect colour perception: ex. A green light would stimulate a green cone, which would then inhibit the red- green ganglion cell, and this inhibition of the red-green cell would signal to the brain that the stimulus is green: ex. A blue stimulus would activate the blue cone which would send an inhibitory signal to the yellow-blue ganglion cell, signaling to the brain that the stimulus was blue: ex. Yellow is a mixture of red and green, so yellow light would cause equal activation of the red and green cones.
