colour vision is determined by three different cone types that are sensitive to short, medium, and long wavelength light.
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the activity of trichromatic theory
The combined activity of all three cones that generate a unique signature associated with each perceived colour even colours without a corresponding wavelength.
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magenta
cant be seen on the wavelength, odd way our brain happens to respond when hit red with blue light.
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colour deficiency
colour blindness, two cones functioning only on x chromosome
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monochromatism
one cone type
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dichromatism
two cone type
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tetrachromatism
three cone type
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opponent-process theory
percieve colour in terms of opposite ends of the spectrum (red to green, yellow to blue, white to black)
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what to do ganglion cells provide
three colour channels certain colours are natural opposites
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negative afterimages
opponent process theory supported by evidence from negative afterimages
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horizontal cells
inhibitory interneurons (GABA releasing) that connect between photoreceptors
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beyond the retina: optic chiasm
crossover point for optic nerve at midpoint of the brain
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beyond the retina: lateral geniculate nucleus
region within thalamus that directs visual information throughout the brain, also receives 90% of visual signals from optic nerve
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primary visual cortex: feature detection cells
neurone that respond selectively based on specific aspects of a stimulus as well as to specific regions of the visual field
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primary visual cortex:
all possible angles are accounted for at any location in our vision
Studied by 1 person
