Chapter 10: Vision 2 & 3 Flashcards

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1
Q

What are 3 essential facts about later 4C?

A
  • M and P pathways remain segregated
  • cells are still center-surround, On and Off pathways remain segregated
  • cells are monocular- receiving input from either one eye or the other
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2
Q

Where does each layer of the LGN receive inputs from?

A

From one eye or the other

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3
Q

Outside of layer 4C of the striate cortex, can cells be driven by both eyes?

A

Yes, cells outside of 4C are binocular

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4
Q

What do many binocular cells code for?

A

For retinal disparity- differences in images from the left and the right eye that the brain uses as a binocular cue to determine depth or distance of an object

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5
Q

What do you call the binocular cue of disparity tuning?

A

Stereopsis

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6
Q

What is an important receptive field property emerging in V1?

A

Orientation tuning

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7
Q

How does orientation tuning work?

A

Simple cell receptive field: inputs from rows of on and off center cells from 4C converge.

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8
Q

What is important for form perception?

A

Orientation tuning

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9
Q

What perception does orientation tuning enable?

A

Form perception

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10
Q

What is another type of selectivity emerging in V1?

A

Direction seleciticty

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11
Q

Explain what direction selectivity is

A

Cells respond to movement in one direction (preferred) but not the other

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12
Q

From V1, where does visual information proceed to

A

To a host of exastriate or association visual cortical areas

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13
Q

What are the two streams of processing?

A

Dorsal and ventral streams
Dorsal: Magno-Pathway —> “where” “action”

Ventral: parvo/konio-pathway —> “what” “who”

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14
Q

Where is motion represented?

A

In the middle temporal area MT

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15
Q

What would lésions of MT entail?

A

Abolish the ability to perceive structure from motion

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16
Q

What do MST neurons respond to?

A

Optic flow stimuli

17
Q

What is the job of MST neurons?

A

Represent the motion of the world as you louve through the world

18
Q

What is color constancy?

A

Ability to determine the color of an object despite changing illumination

19
Q

Where is color constancy coded for?

A

V4

20
Q

What do IT cells identify?

A

Face recognition