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- W1487853526 abstract "Facial happiness is consistently recognized faster than other expressions of emotion. In this study, to determine when and where in the brain such a recognition advantage develops, EEG activity during an expression categorization task was subjected to temporospatial PCA analysis and LAURA source localizations. Happy, angry, and neutral faces were presented either in whole or bottom-half format (with the mouth region visible). The comparison of part- versus whole-face conditions served to examine the role of the smile. Two neural signatures underlying the happy face advantage emerged. One peaked around 140 ms (left N140) and was source-located at the left IT cortex (MTG), with greater activity for happy versus non-happy faces in both whole and bottom-half face format. This suggests an enhanced perceptual encoding mechanism for salient smiles. The other peaked around 370 ms (P3b and N3) and was located at the right IT (FG) and dorsal cingulate (CC) cortices, with greater activity specifically for bottom-half happy versus non-happy faces. This suggests an enhanced recruitment of face-specific information to categorize (or reconstruct) facial happiness from diagnostic smiling mouths. Additional differential brain responses revealed a specific anger effect, with greater activity for angry versus non-angry expressions (right N170 and P230; right pSTS and IPL); and a coarse emotion effect, with greater activity for happy and angry versus neutral expressions (anterior P2 and posterior N170; vmPFC and right IFG)." @default.
- W1487853526 created "2016-06-24" @default.
- W1487853526 creator A5042155855 @default.
- W1487853526 creator A5047340145 @default.
- W1487853526 date "2015-08-07" @default.
- W1487853526 modified "2023-10-03" @default.
- W1487853526 title "Brain signatures of perceiving a smile: Time course and source localization" @default.
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- W1487853526 doi "https://doi.org/10.1002/hbm.22917" @default.
- W1487853526 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/6869607" @default.
- W1487853526 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/26252428" @default.