color part 3 Flashcards
1
Q
where do we perceieve color
A
LGN- single opponent receptive field
V1 blobs- double opponent receptive field
V4- lesion here can cause colorblindness
2
Q
4 congenital color anomolies
A
- monochromatism- only rods (color blindness)
- dichromatism- missing 1 type of cone
- anomalous trichromatism- 1 cone type opsin is slightly different
- tetrachromatism- have 4 cone types
3
Q
3 types of dichromatism
A
- protanopia (L cones missing)
- deuteranopia (M cones missing)
- tritanopia (S cones missing)
4
Q
why is dichromatism more common in men
A
because genes related to cones are on the X chromosome
5
Q
3 types of anomalous trichromatism
A
- protanomaly (malfunctioning L cones)
- deuteranomaly (malfunctioning M cone)
- tritanomaly (malfunctioning S cone)
6
Q
how does tetrachromatism occur
A
X chromosome mutation that passes along an anomalous gene as well as a typical gene resulting in 3 typical cones and 1 anomalous one
- theoretically have 4D color space and require 4 colors to match stimuli
- may not percieve metamers as looking identical when a trichromat does
7
Q
color in art
A
to paint an orange- dont necessariy use only orange, but use white, black, yellow, brown to create appearnace of shadows
