Auditory and Visual Perception Flashcards

(26 cards)

1
Q

What are the three approaches to perception?

A

Psychological, Neuropsychological, Computational

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2
Q

What regulates the size of the pupil in the eye?

A

Iris

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3
Q

What is the function of the lens in the eye?

A

Focuses incoming light on retina

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4
Q

What type of circuits have low convergence in retinal processing?

A

Cone-fed circuits

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5
Q

What type of circuits have high convergence in retinal processing?

A

Rod-fed circuits

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6
Q

What is the definition of a receptive field?

A

The area of the visual field to which they respond

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7
Q

What leads to smaller receptive fields in central vision?

A

Differing convergence

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8
Q

What does cortical magnification refer to?

A

Many more cells dedicated to processing central vision than peripheral vision

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9
Q

What is the visual pathway from the retina to the brain?

A

Retina -> lateral geniculate nuclei (LGN) -> Primary Visual Cortex

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10
Q

What is the primary function of the lateral geniculate nuclei (LGN)?

A

First stage of processing – responds to changes in light levels

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11
Q

What type of receptive fields do LGN cells have?

A

Centre-Surround cells

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12
Q

What does the primary visual cortex respond to?

A

Complicated images – binocular disparity, motion, orientation

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13
Q

What defines limits on perceptual abilities?

A

Differing densities of cone and rod receptors, differing convergence of receptors onto retinal ganglion cells, presence of ‘blindspot’

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14
Q

What do retinotopic maps preserve?

A

Adjacency relationships between cells as signals travel through visual pathway

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15
Q

Where does the left visual field project in the brain?

A

Right hemisphere visual cortex

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16
Q

Where does the right visual field project in the brain?

A

Left hemisphere visual cortex

17
Q

Fill in the blank: Adaptation in __________ responses measures the contrast required for detection.

18
Q

Fill in the blank: Adaptation in the __________ measures reduction in neural responses.

19
Q

What are the two types of receptive fields in V1?

A

Simple cells, Complex cells

20
Q

What is the role of the cochlear nucleus in hearing?

A

Initial processing of auditory information

21
Q

What are the two types of interaural differences that aid in sound localization?

A

Interaural time differences, Interaural level differences

22
Q

What is represented in the primary auditory cortex as a tonotopic map?

23
Q

What does functional specialization in the brain refer to?

A

Different brain areas are specialised for different perceptual processes

24
Q

What does early sensory processing involve?

A

Breaking input signal into basic components

25
What do V1 simple and complex cells show sensitivity to?
Motion sensitivity – local motion
26
What are the types of motion perceived by MT receptive fields?
Expansion/contraction, Rotation, Surface separation, 3D motion, Transparency