ch 11: visual perception

Question 1

what are the principles of object recognition?

Answer 1

precision, unity, flexibly robust, and memory bound

Question 2

precision

Answer 2

being able to recognize specific things/objects and differentiate them

Question 3

unity

Answer 3

recognize objects as a whole and not individual parts

Question 4

flexibly robust

Answer 4

recognize objects at different orientations and conditions

Question 5

memory bound

Answer 5

once you identify objects, non-visual information about object comes to you

Question 6

what are objects determined by?

Answer 6

their parts and by the relationship between parts

Question 7

grandmother cells theory

Answer 7

single set of neurons that fire a lot when you see a specific person/object

Question 8

what does the grandmother cell theory follow?

Answer 8

labeled line approach

Question 9

ensemble theories

Answer 9

bunch of neurons that have different patterns of activation depending on person or object

Question 10

what does ensemble theories follow?

Answer 10

distributed coding approach

Question 11

what are the different pathways for visual pathways?

Answer 11

ventral and dorsal pathway

Question 12

ventral pathway

Answer 12

important for object perception and recognition
*links memory to object
*THE WHAT

Question 13

dorsal pathway

Answer 13

important for spatial perception (THE WHERE)
*scans the world and determines how to interact with it

Question 14

what part of the brain is the ventral pathway in?

Answer 14

temporal lobe

Question 15

what part of the lobe is the dorsal pathway in?

Answer 15

parietal lobe

Question 16

temporal lobe neurons

Answer 16

foveal focus and selective about combinations of shapes/colors

Question 17

foveal focus

Answer 17

contains high density of cones to make images

Question 18

parietal lobe neurons

Answer 18

nonfoveal focus and less selective (does not care about shape/color)

Question 19

temporal lobe activation with hands

Answer 19

more active when the hand resembles an actual hand because temporal lobe neurons are specific
- less active if hand looks like a mitton

Question 20

would the dorsal stream care about the different hands?

Answer 20

NO because it is not specific

Question 21

agnosia

Answer 21

cant identify objects that they see but can identify it using other senses

Question 22

what is damaged in agnosia?

Answer 22

ventral stream but NOT dorsal stream

Question 23

can a patient with agnosia perceive and do the action?

Answer 23

it cannot perceive the image but it can do the action
*intact dorsal stream but damaged ventral stream

Question 24

example of perception and action - Patient D.F

Answer 24

participant could not perceive the slit but could put the card in the slit

Question 25

integrative agnosia

Answer 25

can describe individual features but cannot describe it as a whole

Question 26

integrative agnosia example: Patient C.K

Answer 26

can identify the straight and curved lines of a shape but not the shape itself - can draw it but does not draw the shapes, it draws lines

Question 27

what principle of object recognition is damaged in integrative agnosia?

Answer 27

unity

Question 28

associative agnosia

Answer 28

can put pieces together of a shape/object but they can not identify the object - can describe it but can not link it to memory - good at visual identification

Question 29

what principle of object recognition is damaged in associative agnosia?

Answer 29

memory bound

Question 30

apperceptive agnosia

Answer 30

individual can identify object in typical orientation but not in any other orientation

Question 31

what part of the brain is damaged in apperceptive agnosia?

Answer 31

right hemisphere and ventral stream

Question 32

what principle of object recognition is damaged in apperceptive agnosia?

Answer 32

flexibility robust

Question 33

prosopagnosia

Answer 33

inability to recognize faces but can identify objects

Question 34

what part of the brain is damaged in prosopagnosia?

Answer 34

right hemisphere

Question 35

what principle of object recognition is damaged with prosopagnosia?

Answer 35

precision

Question 36

fusiform face are (FFA)

Answer 36

ventral part of the temporal lobe that responds to faces

Question 37

parahippocampal place area (PPA)

Answer 37

responds to buildings and locations

Question 38

what are FFA and PPA apart of?

Answer 38

ventral stream

Question 39

mind reading task

Answer 39

participant watched movie and a model of the brain was built to see how it responds to real world images

Question 40

mind reading: encoding

Answer 40

observe the stimulus to predict the activation response

Question 41

mind reading: decoding

Answer 41

observe the activation response to predict what the stimulus was