PSYCH-101 Lecture Notes - Lecture 23: Thalamus, Color Theory, Color Vision
18 Sep 2020
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Document Summary
Look at the side of it (so it is out of the fovea) 3 different cones each sensitive to different wavelengths of light (short, medium, and long) Trichromatic theory does not explain negative afterimages. Opponent process theory: we perceive color in terms of opposing pairs: red/green, yellow/blue, white/black. Cells that are stimulated by red are inhibited by green when red is no longer perceived a rebound. Opponent process level of ganglion cells, lgn, visual cortex. Signal travels down optic nerve to brain. Neurons that are feature detectors respond selectively to specific features (v1) After the visual cortex, information is routed to other cortical areas for processing. Important for face processing & object recognition. Visual agnosia inability to recognize objects. Prosopagnosia inability to recognize familiar faces. Help us perceive depth using one eye. Linear perspective, light & shadow, interposition, relative height, relative size. Retinal disparity: different retinal images each eye receives based on its different perspective.
