3 - Colour Perception Flashcards

1
Q

What is human trichromacy? (Colour Cognitive)

A

Three cone types, maximally sensitive at short (s), medium (m) and long (l) wave lengths

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2
Q

What cone lengths occur at ultraviolet light? (Colour Cognitive)

A

Short cone

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3
Q

What cone lengths occur at visible light? (Colour Cognitive)

A

Middle cone

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4
Q

What cone lengths occur at infrared light? (Colour Cognitive)

A

Long cone

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5
Q

What are primates generally seen as? (Colour Cognitive)

A

Dichromatic (two cones)

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6
Q

What are humans seen as? (Colour Cognitive)

A

Trichromatic (three cones)

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7
Q

What colour types does dichromatic detect? (Colour Cognitive)

A
  • Blue

- Yellow

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8
Q

What colour types does trichromatic detect? (Colour Cognitive)

A

Blue and yellow split to red and green

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9
Q

What does a monochromat experience? (Colour Cognitive)

A

No colour vision

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10
Q

What three types of dichromate are there and what do they lack? (Colour Cognitive)

A
  • Protanopia = red cone (l)
  • Deuteranopia = green cone (m)
  • Tritanopia = blue cone (s)
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11
Q

What is a anomalous trichromat? (Colour Cognitive)

A

Someone who has an shortened/alteration in all 3 cones

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12
Q

What is human tetrachromacy? (Colour Cognitive)

A

4 cones are present

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13
Q

What is cone opponency? (Colour Cognitive)

A

Mechanism by which we do early processing of colour signalling

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14
Q

What does a change in colour from red to green signify? (Colour Cognitive)

A

long wavelength to medium wavelength

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15
Q

What does a change in colour from blue to yellow signify? (Colour Cognitive)

A

Short wavelength to long/medium wavelength

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16
Q

What does a change in colour from black to white signify? (Colour Cognitive)

A

Long wavelength to medium wavelength

17
Q

In the lateral geniculate nucleus, what colours does the parvaocellular pathway represent? What does a change in colour from red to green signify? (Colour Cognitive)

A

Red to green

18
Q

In the lateral geniculate nucleus, what colours does the koniocellular pathway represent? What does a change in colour from red to green signify? (Colour Cognitive)

A

Yellow to blue

19
Q

In the lateral geniculate nucleus, what colours does the magnocellular pathway represent? What does a change in colour from red to green signify? (Colour Cognitive)

A

Black to white

20
Q

What is cerebral chromatopsia? (Colour Cognitive)

A

Complete loss of colour vision, occurring through damage to the cortical region

21
Q

What is colour constancy? (Colour Cognitive)

A

A feature that ensures the perceived colour of objects remain constant under caring illumination conditions