en
Scientific article
Open access
English

Lateralized interactive social content and valence processing within the human amygdala

Published inFrontiers in human neuroscience, vol. 6, no. 358
Publication date2012
Abstract

In the past, the amygdala has generally been conceptualized as a fear-processing module. Recently, however, it has been proposed to respond to all stimuli that are relevant with respect to the current needs, goals, and values of an individual. This raises the question of whether the human amygdala may differentiate between separate kinds of relevance. A distinction between emotional (vs. neutral) and social (vs. non-social) relevance is supported by previous studies showing that the human amygdala preferentially responds to both emotionally and socially significant information, and these factors might even display interactive encoding properties. However, no investigation has yet probed a full 2 (positive vs. negative valence) × 2 (social vs. non-social content) processing pattern, with neutral images as an additional baseline. Applying such an extended orthogonal factorial design, our fMRI study demonstrates that the human amygdala is (1) more strongly activated for neutral social vs. non-social information, (2) activated at a similar level when viewing social positive or negative images, but (3) displays a valence effect (negative vs. positive) for non-social images. In addition, this encoding pattern is not influenced by cognitive or behavioral emotion regulation mechanisms, and displays a hemispheric lateralization with more pronounced effects on the right side. Finally, the same valence × social content interaction was found in three additional cortical regions, namely the right fusiform gyrus, right anterior superior temporal gyrus, and medial orbitofrontal cortex. Overall, these findings suggest that valence and social content processing represent distinct kinds of relevance that interact within the human amygdala as well as in a more extensive cortical network, likely subserving a key role in relevance detection.

Keywords
  • Socialcontent
  • Valence
  • Humanamygdala
  • Traitanxiety
  • fMRI
Citation (ISO format)
VRTICKA, Pascal, SANDER, David, VUILLEUMIER, Patrik. Lateralized interactive social content and valence processing within the human amygdala. In: Frontiers in human neuroscience, 2012, vol. 6, n° 358. doi: 10.3389/fnhum.2012.00358
Main files (1)
Article (Published version)
accessLevelPublic
Identifiers
ISSN of the journal1662-5161
642views
336downloads

Technical informations

Creation11/22/2013 10:05:00 AM
First validation11/22/2013 10:05:00 AM
Update time03/14/2023 8:46:16 PM
Status update03/14/2023 8:46:16 PM
Last indexation05/02/2024 1:38:50 PM
All rights reserved by Archive ouverte UNIGE and the University of GenevaunigeBlack