Prosopagnosia is type of associative agnosia
specific for face recognition that can be so severe patients cannot
even recognize their own faces.
results from right occipito-temporal lesions, and
can be developmental, acquired, sex-specific or gender neutral.
to be based on holistic representations (instead of processing via
decomposition and reconstruction).
Affected people can often
use other non-visual cues, such as hairline, voice, and clothing to
identify people, and can even recognize facial patterns, although
profiles can be confusing.
in the absence of any other disorder of visual processing, suggesting
that there are areas of the brain that specifically process visual
information pertaining to face recognition.
The complexity of face recognition strongly
suggests that there are multiple regions of the brain involved in face
processing, that if damaged lead to prosopagnosia, but the exact
underlying cause has yet to be identified.