Neural correlates of perceiving emotional faces and bodies in developmental prosopagnosia: an event-related fMRI-study.
Many people experience transient difficulties in recognizing faces but only a small number of them cannot recognize their family members when meeting them unexpectedly. Such face blindness is associated with serious problems in everyday life. A better understanding of the neuro-functional basis of impaired face recognition may be achieved by a careful comparison with an equally unique object category and by a adding a more realistic setting involving neutral faces as well facial expressions. We used event-related functional magnetic resonance imaging (fMRI) to investigate the neuro-functional basis of perceiving faces and bodies in three developmental prosopagnosics (DP) and matched healthy controls. Our approach involved materials consisting of neutral faces and bodies as well as faces and bodies expressing fear or happiness. The first main result is that the presence of emotional information has a different effect in the patient vs. the control group in the fusiform face area (FFA). Neutral faces trigger lower activation in the DP group, compared to the control group, while activation for facial expressions is the same in both groups. The second main result is that compared to controls, DPs have increased activation for bodies in the inferior occipital gyrus (IOG) and for neutral faces in the extrastriate body area (EBA), indicating that body and face sensitive processes are less categorically segregated in DP. Taken together our study shows the importance of using naturalistic emotional stimuli for a better understanding of developmental face deficits.
Van den Stock
Jan
J
Laboratory of Cognitive and Affective Neuroscience, Tilburg University, Tilburg, The Netherlands.
van de Riet
Wim A C
WA
Righart
Ruthger
R
de Gelder
Beatrice
B
D000328:Adult; D001921:Brain / Q000473:pathology; D001931:Brain Mapping; D004644:Emotions / Q000502:physiology*; D005145:Face / Q000473:pathology; D005149:Facial Expression; D005260:Female; D018594:Human Body; D006801:Humans; D007091:Image Processing, Computer-Assisted; D008279:Magnetic Resonance Imaging / Q000379:methods*; D008297:Male; D008875:Middle Aged; D010364:Pattern Recognition, Visual / Q000502:physiology; D020238:Prosopagnosia / Q000473:pathology*
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