BACKGROUND: Some @entity1 with @entity10400 have covert recognition, meaning that they retain some familiarity or knowledge of facial identity of which they are not aware. OBJECTIVE: To test the hypothesis that prosopagnosic @entity1 with @entity75 and impaired face perception lack covert processing, whereas @entity1 with associative @entity10400 and bilateral anterior temporal lesions possess it. METHODS: Eight @entity1 with @entity10400 were tested with a battery of four face recognition tests to determine their ability to discriminate between famous and unknown faces. RESULTS: Measures of overt familiarity revealed better residual discrimination in @entity1 with @entity10400 than in those with the developmental form. With forced-choice methods using famous faces paired with unknown faces, no @entity1 demonstrated covert familiarity. However, when the semantic cue of the name of the famous face was provided, covert processing was present in all five @entity1 with @entity10400 , including the three with extensive right-sided lesions and impaired perceptual discrimination of facial configuration. Sorting unrecognized faces by occupation was also performed above chance in three of these five @entity1 . In contrast, none of the three @entity1 with @entity10400 had covert processing, even though two demonstrated flawless performance on similar tests of name (rather than face) recognition. Overt familiarity correlated highly with the degree of covert recognition. CONCLUSIONS: Extensive @entity75 with significant @entity51 are not incompatible with covert face processing. Covert processing is absent in @entity10400 , because this condition likely precludes the establishment of a store of accurate facial memories. The presence of covert processing correlates with the degree of residual overt familiarity, indicating that these are related phenomena.

Covert recognition in acquired and XXXX .

@entity1 :: ('9606', 'Species') :: ['patients', 'patient'] @entity51 :: ('MESH:D009461', 'Disease') :: ['deficits in face perception'] @entity75 :: ('MESH:D001927', 'Disease') :: ['right occipitotemporal lesions'] @entity10400 :: ('MESH:D020238', 'Disease') :: ['developmental prosopagnosia', 'prosopagnosia', 'acquired prosopagnosia']
@entity10400 :: (MESH:D020238,Disease) :: ['developmental prosopagnosia']
