Article (Scientific journals)
Impaired face discrimination in acquired prosopagnosia is associated with abnormal response to individual faces in the right middle fusiform gyrus
SCHILTZ, Christine; Sorger, Bettina; Caldara, Roberto et al.
2006In Cerebral Cortex, 16 (4), p. 574-586
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Keywords :
cognitive neuroscience; faces; fMRI; fusiform gyrus; prosopagnosia; vision
Abstract :
[en] The middle fusiform gyrus (MFG) and the inferior occipital gyrus (IOG) are activated by both detection and identification of faces. Paradoxically, patients with acquired prosopagnosia following lesions to either of these regions in the right hemisphere cannot identify faces, but can still detect faces. Here we acquired functional magnetic resonance imaging (fMRI) data during face processing in a patient presenting a specific deficit in individual face recognition, following lesions encompassing the right IOG. Using an adaptation paradigm we show that the fMRI signal in the rMFG of the patient, while being larger in response to faces as compared to objects, does not differ between conditions presenting identical and distinct faces, in contrast to the larger response to distinct faces observed in controls. These results suggest that individual discrimination of faces critically depends on the integrity of both the rMFG and the rIOG, which may interact through re-entrant cortical connections in the normal brain.
Disciplines :
Neurosciences & behavior
Theoretical & cognitive psychology
Author, co-author :
SCHILTZ, Christine ;  Université Catholique de Louvain - UCL > Laboratoire de Neurophysiologie
Sorger, Bettina
Caldara, Roberto
Ahmed, Fatima
Mayer, Eugene
Goebel, Rainer
Rossion, Bruno
Language :
English
Title :
Impaired face discrimination in acquired prosopagnosia is associated with abnormal response to individual faces in the right middle fusiform gyrus
Publication date :
April 2006
Journal title :
Cerebral Cortex
ISSN :
1047-3211
eISSN :
1460-2199
Publisher :
Oxford University Press, Cary, United States - North Carolina
Volume :
16
Issue :
4
Pages :
574-586
Peer reviewed :
Peer Reviewed verified by ORBi
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