disorders of object recognition Flashcards

1
Q

Name 4 reasons people might not be able to recognise an object

A
sensory deficit (eye problem)
knowledge deficit (alzheimers)
language deficit (aphasia)
unable to percieve AGNOSIA
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2
Q

What is visual agnosia

A

able to draw from memory, define something, identify by touch BUT cant recognise object

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3
Q

what is optic ataxia

A

patients have trouble reaching for an object, adjusting their grasp

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4
Q

visual agnosia and optic ataxia arise from problems where..

A
VA = vent stream to inf temporal lobe 
OA = dorsal stream projecting to parietal lobe
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5
Q

Describe apperceptive agnosia

A

DF cant put edges of the object together / work out whats background or shadows. cant fill in fragments of pictures or cant see pics if they overlap

edge grouping, feature binding, view normalisation

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6
Q

describe associative agnosia

A

GS can see the whole form of the shape but cant recognise the object - can copy objects down etc but cant name them

failure to access semantic representation

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7
Q

Which one has unconscious awareness of action and what is it?

A

GS given a picture of a lock, he cant name it but subconsciously twirls his fingers in the motion of unlocking a lock

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8
Q

associative and apperceptive which is which patient

A

GS - associative

DF - apperceptive

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