Prosopagnosia Flashcards
What is prosopagnosia?
Inability to identify faces
What is apperceptive prosopagnosia?
Face position is not understood
Drawing faces difficult
What is associative prosopagnosia?
Facial position understood but not recognised
Where is fusiform area located?
What is is there greater activation for?
On fusiform gyrus on base of temporal lobe
For faces
What do individuals with congenital prosopagnosia have and decreased what?
A smaller fusifrom gyrus and decreased connectivity within occipital temporal cortex
What did patient FB suffer from?
What lesion did have?
What did he experience?
Blood clot to brain
Right hemisphere lesion to the fusiform gyrus, inferior temporal gyrus and middle temporal gyrus
Only difficulty recognising faces
What is recognition?
The identification of stimuli
What is the skin conductance response?
When does it respond?
High density of sweat glands found on hands and feet
More responsive to psychologically significant stimuli
The more emotionally aroused you are the more active sweat glands the greater the electrical conductivity
What in terms of biology could have damage to it causing prosopagnosia?
What is they visual system incapable of accessing?
How is the limbic system and the faces emotional significance accessed?
What is the dorsal route capable of?
Ventral visuolimbic pathway
The memory store (overt recognition)
Via the intact dorsal route
Discriminating relevance and irrelevance by integrating limbic and multimodal sensory input (covert recognition)
What is covert recognition?
Unconscious recognition
What is overt recognition?
Conscious recognition
Where did Philip have damage to?
Temporal lobe
What does the Bruce & Young’s model suggest?
What does damage to A cause in the face recognition units (fusiform gyrus)?
What does damage to route B in face recognition units (fusiform gyrus)?
Structural encoding relating to identify info is damaged results in prosopagnosia
Associated with prosopagnosia > PINS (anterior temporal)
Associated with capgras delusions (amygdala)
What is capgras syndrome?
Recognising an individual but believing that they are an imposter
