psych106-11 - Lecture 11(Feb 8th VISION#2 Lecture Outline 1...

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Lecture 11 (Feb 8 th ): VISION (#2) Lecture Outline 1) Color Perception and Neural Processing 2) Movement Perception and Neural Processing Don’t worry about “SHAPE PATHWAY” (including Inter-Blobs and Inter-Stripes) Don’t worry about “simple”, “complex” and “endstopped” neurons
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COLOR VISION 1) Spectral (Single λ ) Colors: ROYGBIV (750 – 390 nm) 2) Broadband (multiple λ s) Colors: e.g., “white” is equal energy of all wavelengths Two Types of Colors : Most things in the world are (2), not (1) = 660 Energy Energy Spectrum SUNLIGHT Amplitude λ = 580 nm (yellow) Space Wavelength (nm) 450 500 550 600 650 400 "Green" "Red" "Blue" Energy Spectrum Energy Wavelength (nm) 450 500 550 600 650 400 "Green" "Red" "Blue" Energy Spectrum Energy
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Why do things look colored? (roughly) white light Wavelength (nm) 450 500 550 600 650 400 "Green" "Red" "Blue" Energy Spectrum of Light Reflected off Shirt Energy Reflected goes into your eye Absorbed stays in the pigment of the shirt
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Light Absorption by Photoreceptors (Cones and Rods) Outersegment of Photoreceptor contains: VISUAL PIGMENT a) absorbed light alters the configuration of retinal A (isomerization) (which λ
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