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Neuropsychology > Week 5 > Flashcards

Week 5 Flashcards

1
Q

The visual pathways has a :

A

Hierarchical

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2
Q

What are the 3 stages of visual path ways

A

early
mid-level
transform from image-based

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3
Q

what information is extracted from an image?

A

Line
colour
length
direction

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4
Q

what are spacial frequency tuned channels do?

A

carry the signal through the early stage and explain contrast sensitivity

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5
Q

What are objects constructed from?

A

component lines

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6
Q

What are Gobor-like receptive fields?

A

used to determine shape (colour, luminance, texture) of an object

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7
Q

which receptive field is used for localising points?

A

V1 receptive fields

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8
Q

What does the brain automatically do in a scene?

A

Segment scene into figures/objects and background

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9
Q

What is border ownership?

A

edges are assigned to objects

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10
Q

What receptive field is involved with border ownership

A

V2 receptive fields

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11
Q

what is grouping element contours?

A

Contours tend to be smooth in local regions so elements that extend a contour with minimal change of orientation are likely to be the same contour

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12
Q

What is Gestalt grouping principle?

A

the visual system automatically group together element into larger units (visual system fills gaps)

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13
Q

which receptive field response to shapes with convex projections

A

V4 Receptive field

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14
Q

What is texture segmentation ?

A

carving an image into a region of common texture properties

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15
Q

What is the amplitude of modulation?

A

the radial frequency of a pattern

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16
Q

What are the grouping principles?

A

Similarity and proximity

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17
Q

What is the grouping principle of similarity?

A

The tendency of two features to group together will increase as the similarity between them increases.

18
Q

What is the grouping principle of proximity?

A

The tendency of two features to group together will increase as the distance between them decreases.

19
Q

What are weaker grouping techniques?

A

Parallelism and symmetry

20
Q

How to test for Global integration?

A

Use of multiple circles and determine which one is the mort absurd.

21
Q

The more bumps on a circle in the Global integration task results in:

A

being easier to identify the target circle

22
Q

how can you measure the sensitivity to structure in texture?

A

determining how many dot pairs need to have the correct orientation to discriminate structure from random.

23
Q

What are the two stages of Glass texture?

A

Both dots need the same polarity to signal correct orientation
combine increments or decrements to get global pattrrn

24
Q

what is the Ventral pathway of the brain?

A

Local stage = V1

global stage = V4

25
Q

What impact on interpretation?

A

prior knowledge and experiences

26
Q

What matters when predicting movement?

A

expectation matters

27
Q

What is autism ?

A

development disorder associated with characterise psychological deficits

28
Q

What does autism entail?

A

Social interactions
communication
repetitive behaviour

29
Q

how is autism caused

A

Cortical damage in pattern processing

30
Q

what are the visual aspects of autism

A

superior performance on tasks which involve focusing on parts of a complex stimulus

31
Q

What motion threshold is associated with autism?

A

Poor global motion thresholds

32
Q

what does EFT Mean?

A

Embedded figures test

33
Q

What is the EFT?

A

is a visual serach task

34
Q

Is global contour processing difference in ASD?

A

there is a stronger global contour integration in ASD

35
Q

People that have a higher IQ have a:

A

Steeper gradient for integration of contour

36
Q

What is a visual aura?

A

Unformed flashes of white and black light
darling zigzag
blurred or shimmering cloudy vision
hemianopsia

37
Q

What is visual perimetry?

A

Measure of contrast sensitivity.

38
Q

What are the two types of Visual perimetry ?

A

static target

Flickering target

39
Q

what is Apperceptive Agnosia?

A

a person can not name, match or discriminate visual pressed objects

40
Q

What is associative agnosia?

A

cannot use the derived representation to access stored knowledge of the objects function and association. can copy

41
Q

What is hallmark of integrative agnosia?

A

an impairment in integrating elements, which are detected into a perceptual whole

42
Q

What is integrative agnosia and the tendency to autism?

A

consistent with a weaker ability to use the global context when detecting stimuli

Neuropsychology (12 decks)

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