Abstract:
:Emotional stimuli have been shown to preferentially engage initial attention but their sustained effects on neural processing remain largely unknown. The present study evaluated whether emotional faces engage sustained neural processing by examining the attenuation of neural repetition suppression to repeated emotional faces. Repetition suppression of neural function refers to the general reduction of neural activity when processing a repeated stimulus. Preferential processing of emotional face stimuli, however, should elicit sustained neural processing such that repetition suppression to repeated emotional faces is attenuated relative to faces with no emotional content. We measured the reduction of functional magnetic resonance imaging signals associated with immediate repetition of neutral, angry and happy faces. Whereas neutral faces elicited the greatest suppression in ventral visual cortex, followed by angry faces, repetition suppression was the most attenuated for happy faces. Indeed, happy faces showed almost no repetition suppression in part of the right-inferior occipital and fusiform gyri, which play an important role in face-identity processing. Our findings suggest that happy faces are associated with sustained visual encoding of face identity and thereby assist in the formation of more elaborate representations of the faces, congruent with findings in the behavioral literature.
journal_name
Soc Cogn Affect Neuroscijournal_title
Social cognitive and affective neuroscienceauthors
Suzuki A,Goh JO,Hebrank A,Sutton BP,Jenkins L,Flicker BA,Park DCdoi
10.1093/scan/nsq058subject
Has Abstractpub_date
2011-09-01 00:00:00pages
434-41issue
4eissn
1749-5016issn
1749-5024pii
nsq058journal_volume
6pub_type
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