chapter 4-perceiving and recognizing objects Flashcards

1
Q

extrastriate cortex

A

region of cortex bordering the primary visual cortex; V2, V3, V4

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

what comes after extrastriate cortex

A

where and what pathways

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

where pathway

A

locations and movement of objects; motion/direction, depth sensitive

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

where pathway location

A

dorsal, parietal, MT/MST

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

what pathway

A

names and functions of objects; specialized areas that respond best to different types of objects; object recognition

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

what pathway location

A

ventral, temporal, IT

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

perception processing is what pathway

A

ventral, what

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

action processing is what pathway

A

dorsal, where

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

double dissociation

A

two related mental processes can function independently of each other; damage to one does not affect the other

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

ventral stream damage

A

no perception, visual form agnosia

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

dorsal stream damage

A

no action, optic ataxia

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

what imaging technique can be used to find brain areas that do more of one thing than another

A

fMRI

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

MT/medial temporal function

A

motion processing (dorsal)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

FFA/fusiform face area

A

faces (ventral)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

EBA/extrastriate body area

A

responds well to body parts that aren’t the face (ventral)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

PPA/parahippocampal place area

A

mix location and functionality, processing scenes and places (houses)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

what process helps with rapid object recognition; little feedback from higher brain areas

A

feed-forward process

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

feed-forward process

A

carries out a computation one neural step after another, without feedback from higher areas to lower ones

19
Q

what imaging technique is used for the feed-forward process

20
Q

global superiority effect

A

properties of the whole object take precedence over the properties of parts of the object; large scale properties, overall shape

21
Q

lower vision

A

detection of basic features (spots and bars); retinal starting point –> LGN –> V1

22
Q

middle vision

A

loosely defined stage of visual processing that deals with perception of edges and surfaces, determines which regions of an image should be grouped together into objects; V2, V3

23
Q

upper vision

A

perception of objects; IT

24
Q

receptive fields in extrastriate areas are more ___ than the striate cortex

A

sophisticated

25
extrastriate receptive fields respond to
visual properties important for perceiving objects; boundary ownership and illusory contours
26
similarity
items with similar properties tend to group
27
proximity
items that are near each other tend to group
28
texture segmentation
carving an image into regions of common texture properties
29
good continuation
two elements will tend to group together if they lie on the same contour
30
occlusion
visual system blocked, cant see all of the object
31
reliability
the degree to which two line segments appear to be part of the same contour
32
T junctions
occlusion of one object from another
33
arrow and Y junctions
indicate corners within an object
34
generic
assumed to be typical or widely representative
35
accidental
specific/unusual, doesnt generalize; hiding or losing info about object
36
dealing with occlusion; preference for ___ views
generic
37
nonaccidental feature
feature of an object that is not dependent on the exact (accidental) viewpoint
38
recognition by components model
biederman's model of object recognition, objects are recognized by the identities and relationships of their component parts
39
geons
geometric ions out of which objects are made
40
recognition by components model is viewpoint ___
invariant
41
viewpoint invariant
recognize object no matter what angle
42
the father an object is rotated from a learned view, the ___ it takes to recognize
longer; visual system not necessarily viewpoint invariant
43
prosopagnosia
inability to recognize faces; right hemisphere damage (FFA)