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SlideshowReport

Color Coding in the Retina

Description
(a) Red light stimulating a “red” cone, which causes excitation of a red-green ganglion cell. (b) Green light stimulating a “green” cone, which causes inhibition of a red-green ganglion cell. (c) Yellow light stimulating “red” and “green” cones equally but not affecting “blue” cones. The stimulation of “red” and “green” cones causes excitation of a yellow-blue ganglion cell. (d) Blue light stimulating a “blue” cone, which causes inhibition of a yellow-blue ganglion cell. The arrows labeled E and I represent neural circuitry within the retina that translates excitation of a cone into excitation or inhibition of a ganglion cell. For clarity, only some of the circuits are shown.
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