A lesion in the left or right medial occipitotemporal region can result in a specific pattern of visual agnosia.
Arterial supply: posterior cerebral artery
Agnosia:
(1) prosopagnosia: inability to recognize familiar faces
(2) topographagnosia: inability to understand spatial relationships (unable to read a map or find one's way around)
(3) alexia: inability to read
Capacity |
Left Side Injury |
Right Side Injury |
recognize familiar faces |
able |
unable (prospoagnosia) |
interpret spatial relationships |
able |
unable (topographagnosia) |
interpret nonverbal facial expressions |
able |
unable |
lipreading |
unable |
able |
reading |
unable (alexia) |
able |
Specialty: Neurology, Emergency Medicine