Week 9.2 Vision Percep

Question 1

two parallel cortical processing streams

Answer 1

dorsal - to superior parietal lobe
ventral - to inferior temporal lobe

Question 2

visual perception is about

Answer 2

transforming patterns of light that enter our eyes into a representation of the world

Question 3

FFA

Answer 3

fusiform face area - responds to faces more than other objects

Question 4

PPA

Answer 4

parahippocampal place area - responds preferentially to places e.g. pics of houses

Question 5

EBA

Answer 5

extrastriate body area - involved in perception of body parts

Question 6

two visual systems

Answer 6

dorsal
ventral

Question 7

dorsal system

Answer 7

‘where’ system - binocular info
visual control of movement
egocentric
unconscious

Question 8

ventral system

Answer 8

‘what’ system
identification of objects/events
allocentric
conscious

Question 9

evidence for two systems Milner and Goodale 1995 optic ataxia

Answer 9

no difficulty identifying visual stim
difficulty moving toward target
more difficult pointing without delay

Question 10

what does optic ataxia result from and what does it cause

Answer 10

lesions to posterior-superior parietal cortex
mis-reaching
hand posture problems

Question 11

evidence for two systems Milner and Goodale 1995 visual agnosia (DF - visual deficits)

Answer 11

• can’t recognise faces/objects/shapes and sizes
• can draw from memory
• can’t copy picture or recognise own drawing
• negotiates obstacles during locomotion
• can’t estimate height of obstacles
• proficient at grasping (hand-orientation and grip aperture)