dorsal and ventral streams

Question 1

dorsal pathway

Answer 1

V1>V2>V3>MT/V5>MST

concerned with movement, depth and position

Question 2

extra-striate cortical area pre-dominantly magnocellular

Answer 2

dorsal

Question 3

ventral pathway

Answer 3

V1>V2>V4>IT

Question 4

extra-striate cortical area pre-dominantly parvocellular

Answer 4

ventral pathway

Question 5

blob region

Answer 5

color sensitive (color opponent)

Question 6

inter-blob region

Answer 6

orientation selective (NOT directional or color selective)

Question 7

thick stripes

Answer 7

visual orientation map (where something is in orientation to something

Question 8

thin stripes

Answer 8

color map

Question 9

inter-stripes

Answer 9

disparity map (stereopsis and thickness and size)

Question 10

M pathway

Answer 10

projects layer 4b(V1) to thick stripes(V2)

Question 11

P-B pathway

Answer 11

projects blob(V1) to thin stripes(V2)

Question 12

P-I pathway

Answer 12

projects inter-blob (V1) to thin inter-stripes/pale stripe(V2)

Question 13

V2 cortical area

Answer 13

important in object recognition

Question 14

blindsignt

Answer 14

pt can see moving object after removal of straite cortex. information gets sent from the LGN to the V3/MT and through the dorsal stream

Question 15

optic ataxia

Answer 15

damage to posterior parietal cortex, difficulty with visual motor coordination (reaching), no difficulty recognizing objects

Question 16

optic ataxia

Answer 16

damage to posterior parietal cortex, difficulty with visual motor coordination (reaching), no difficulty recognizing objects

Question 17

prosopagnosia

Answer 17

cannot identify faces/distinguish facial features

Question 18

inferotemporal cortex

Answer 18

cells respond selectively to complex forms such as pictures of faces

Question 19

visual form agnosia

Answer 19

impaired ventral stream; damage to ventral occipital and posterior temporal cortex; difficulty recognizing and discriminating objects

Question 20

good manual estimation

Answer 20

Optic ataxia

Question 21

good grasp calibration

Answer 21

ventral form agnosia

Question 22

bad manual estimation (cannot show size of water bottle)

Answer 22

ventral form agnosia

Question 23

bad grasp calibration (cannot grab water bottle/track motion)

Answer 23

optic ataxia

Question 24

which pathway has a quicker conduction time

Answer 24

dorsal stream

Question 25

which pathway has a slower conduction time

Answer 25

ventral stream

Question 26

disorders with dorsal visual stream difficulty

Answer 26

william's syndrome, preterm birth, dyslexia, autism, (and possibly fetal alcohol syndrome)

Question 27

TMS

Answer 27

"Transcranial Magnetic Stimulation". oscilating magnetic field generated within the TMS coil pass through the skull and induce a current in the underlying cortex (activates neurons)

Question 28

rTMA

Answer 28

"virtual lesion"

Question 29

waterfall illusion

Answer 29

occurs after motion adaptation

Question 30

optic flow

Answer 30

motion of all surface elements from the visual world ( can determine current direction of movement from these surfaces)

Question 31

form perception

Answer 31

the ability to segment the spatial attributes (size and shape) of a single entity from other entities and from background

Question 32

form perception

Answer 32

the ability to segment the spatial attributes (size and shape) of a single entity from other entities and from background

Question 33

detection

Answer 33

determines the presence or absence of an object.

Question 34

discrimination

Answer 34

the ability to distinguish one object from another - more refined process

Question 35

identification

Answer 35

recognizing and labeling a particular item

Question 36

processes faces, objects and places

Answer 36

ventral pathway

Question 37

grouping laws

Answer 37

proximity, similarity, orientation, closure, good continuation, familiarity, adaptation, face recognition

Question 38

closure

Answer 38

tend to fill out incomplete detais to form good figures

Question 39

good continuation

Answer 39

the visual system prefers continuity, connecting a particular path from a random figure

Question 40

familiarity

Answer 40

you will see put together an image from specs if similar to something you know

Question 41

adaptation to intensity

Answer 41

saccades keep edges "alive, subtle intensity gradient doesn't create large enough saccades to re-trigger edge detectors

Question 42

moon illusion

Answer 42

size illusion - moon looks larger on horizon than above

Question 43

muller-lyer illusion

Answer 43

lines going away make room look bigger and lines going in make room look smaller....

Question 44

spatial vision

Answer 44

variations in luminance across space

Question 45

examples of spatial vision

Answer 45

visual acuity and contrast sensitivity