Amygdala responses to unpleasant pictures are influenced by task demands and positive affect trait

Frontiers in Human Neuroscience
Tiago A SanchezLeticia Oliveira

Abstract

The role of attention in emotional processing is still the subject of debate. Recent studies have found that high positive affect in approach motivation narrows attention. Furthermore, the positive affect trait has been suggested as an important component for determining human variability in threat reactivity. We employed functional magnetic resonance imaging to investigate whether different states of attention control would modulate amygdala responses to highly unpleasant pictures relative to neutral and whether this modulation would be influenced by the positive affect trait. Participants (n = 22, 12 male) were scanned while viewing neutral (people) or unpleasant pictures (mutilated bodies) flanked by two peripheral bars. They were instructed to (a) judge the picture content as unpleasant or neutral or (b) to judge the difference in orientation between the bars in an easy condition (0 or 90(∘) orientation difference) or (c) in a hard condition (0 or 6(∘) orientation difference). Whole brain analysis revealed a task main effect of brain areas related to the experimental manipulation of attentional control, including the amygdala, dorsolateral prefrontal cortex, and posterior parietal cortex. Region of interest analysis showed ...Continue Reading

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Citations

Jan 16, 2016·NeuroImage·Orlando FernandesJanaina Mourao-Miranda
Mar 21, 2018·Journal of Biomedical Science·Francisco MagalhãesSilmar Teixeira
Jul 26, 2017·Frontiers in Psychology·Heraldo D SilvaGabriela G L Souza
Aug 4, 2018·Frontiers in Psychology·Jessica S B FigueiraIsabel A David
Jun 11, 2020·Revista brasileira de psiquiatria : orgão oficial da Associação Brasileira de Psiquiatria, Asociación Psiquiátrica de la América Latina·Geraldo Busatto FilhoFabio L Duran
May 20, 2020·Frontiers in Psychology·Thomas MartensUwe Dick
Nov 30, 2018·Frontiers in Human Neuroscience·Andressa A MagalhaesCarolina B Menezes
Oct 10, 2020·Brain Imaging and Behavior·Di QiTatia M C Lee

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