disorders of object recognition Flashcards
Name 4 reasons people might not be able to recognise an object
sensory deficit (eye problem) knowledge deficit (alzheimers) language deficit (aphasia) unable to percieve AGNOSIA
What is visual agnosia
able to draw from memory, define something, identify by touch BUT cant recognise object
what is optic ataxia
patients have trouble reaching for an object, adjusting their grasp
visual agnosia and optic ataxia arise from problems where..
VA = vent stream to inf temporal lobe OA = dorsal stream projecting to parietal lobe
Describe apperceptive agnosia
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
describe associative agnosia
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
Which one has unconscious awareness of action and what is it?
GS given a picture of a lock, he cant name it but subconsciously twirls his fingers in the motion of unlocking a lock
associative and apperceptive which is which patient
GS - associative
DF - apperceptive