Lecture 4 - representation of complex images

Question 1

ventral stream

Answer 1

Processes visual information for the purpose of visual perception. Carries visual info from the primary visual cortex to the temporal lobe.

Question 2

Dorsal stream

Answer 2

Processes visual information for the purpose of executing actions, it supports visually guided behaviours and localising objects in space.

Question 3

invariance

Answer 3

encoding a representation so that it is identified regardless of size, orientation, colour etc

Question 4

Could Jennifer Anitson cells be modulated by familiarity

Answer 4

Yes, more likely to get a response for the people the patients know well.

Question 5

Could Jennifer Anitson cell firing just be an emotional response

Answer 5

No, patients didnt respond to emotional items like spiders and snakes

Question 6

Ensemble, distributed, dense or population coding

Answer 6

Grouping objects together based on shared properties (opposite of grandmother cell)

Question 7

Local coding in relation to the goals of the visual system

Answer 7

It is good for pattern discrimination because 2 completely different cells are firing. However this makes generalisation difficult and pattern completion would require access to representations of similar objects.

Question 8

Ensemble (dense) encoding in relation to goals of the visual system.

Answer 8

allows for generalisation as two cells can be active for one context or multiple stimuli. This will therefore also be good for pattern completion because it allows for overlap between representations.