Animation of the fusiform area, the area damaged in prosopagnosia. Prosopagnosia /ˌprɒsəpæɡˈnoʊʒə/ (Greek: "prosopon" = "face", "agnosia" = "not knowing"), also called face blindness, is a cognitive disorder of face perception where the ability to recognize faces is impaired, while other aspects of visual processing (e.g., object discrimination) and intellectual functioning (e.g., decision making) remain intact. The term originally referred to a condition following acute brain damage (acquired prosopagnosia), but a congenital or developmental form of the disorder also exists, which may affect up to 2.5% of the population. The specific brain area usually associated with prosopagnosia is the fusiform gyrus, which activates specifically in response to faces. The functionality of the fusiform gyrus allows most people to recognize faces in more detail than they do similarly complex inanimate objects. There are two types of prosopagnosia: acquired and congenital (developmental).
Related: Disorders of sight
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