4. Agnosia/Prosopagnosia Flashcards
What is agnosia? (ccc agnosia)
When object recognition fails, typically after brain damage
Why can agnosia not be attributed to the loss of knowledge about objects? (ccc agnosia)
The loss of knowledge about objects is known as semantic dementia
What is the main strand of agnosia? (ccc agnosia)
Apperceptive agnosia
What do apperceptive agnosia patients struggle with? (ccc agnosia)
Basic copying and matching tasks
What stage is the damage in apperceptive agnosia patients? (ccc agnosia)
Stage 3 - Shape representation
What is associative agnosia patients struggle with? (ccc agnosia)
They cannot name an object, despite having intact knowledge of the object
What stage is the damage in associative agnosia patients? (ccc agnosia)
Stage 4 - Object representation
What is prosopagnosia? (ccc agnosia)
The inability to recognise faces
What was shown by the peak conductive responses (SCR’s) on prosopagnosic patients when they were presented with a picture of someone they have an emotional attachment to? (ccc agnosia)
They patients could not consciously recall the person, but they did have a sweat response
What are the characteristics of a capgras syndrome patient? (ccc agnosia)
Can recognise faces, yet deny the identity of the individual e.g they are an imposter
In terms of covert responses and overt responses, what would a prosopagnosic patient have? (ccc agnosia)
Covert = intact Overt = impaired
In terms of covert responses and overt responses, what would a capgras syndrome patient have? (ccc agnosia)
Covert = impaired Overt = intact
