Agnosia & Prosopagnosia

Question 1

Define agnosia

Answer 1

Impairment of visual object recognition, caused by damage to occipital or inferior temporal cortex

Question 2

What are the two types of agnosia?

Answer 2

apperceptive: low-level feature binding absent (stage 1), can’t copy image
associative: recognition/naming absent (stage 3, object knowledge)

Question 3

Define prosopagnosia

Answer 3

Failure to recognise faces; right inferotemporal lesion (overt ventral route)

Question 4

Define the Capgras delusion

Answer 4

prosopagnosia where familiar people appear as imposters (deny identity, covert dorsal route through superior temporal sulcus and inferior parietal lobe); personal identity node ;)

Question 5

Define Cortards syndrome

Answer 5

Loss to all emotional response

Question 6

what is the striate cortex and the limbic system responsible for?

Answer 6

processing visual info, behavioural and emotional response