LECTURE 5- AGNOSIA AND FACE RECOGNITION

Question 1

What are 2 types of agnosia

Answer 1

apperceptive and associative

Question 2

what is apperceptive agnosia

Answer 2

ability to perceive features but unable to group features to name an object

this is due to damage in the posterior regions of the right hemisphere

Question 3

what is associative agnosia

Answer 3

able to group features but cannot associate features with stored knowledge of object identity

damage to temporal and occipital lobes in both hemispheres

Question 4

what does agnosia tell us about object recognition

Answer 4

1- tells us detecting the features in a visual stimulus is separate process from sensation (both types can perceive features)

2- detecting the visual features is critical in constructing a whole object (apperceptive agnosia- deficit of grouping features)

3- there is a separate step in connecting an object with its meaning and name (associative agnosia0 deficit with stored knowledge of object)

Question 5

face recognition=

Answer 5

involves holistic processing

holistic processing= integrating info from an entire object

so with faces we see it all as one

Question 6

what is prosopagnosia

Answer 6

face blindness- poor face recognition but good object recognition

this proves face and object recognition involves different areas!