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Amygdala reactivity and connectivity during social and non-social aversive stimulation in social anxiety disorder
Stockholm University, Faculty of Social Sciences, Department of Psychology, Biological psychology. Uppsala University, Sweden.
Stockholm University, Faculty of Social Sciences, Department of Psychology, Biological psychology.
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2018 (English)In: Psychiatry Research: Neuroimaging, ISSN 0925-4927, E-ISSN 1872-7506, Vol. 280, p. 56-61Article in journal (Refereed) Published
Abstract [en]

Social anxiety disorder (SAD) is characterized by exaggerated amygdala reactivity in response to symptom provocation, but it is unclear if such hyper-reactivity is elicited by disorder-specific challenges only or characterizes reactions to aversive stimuli in general. Here, using functional magnetic resonance imaging in 14 patients with SAD, as compared to 12 healthy controls, we found that amygdala hyper-reactivity is confined to disorder-relevant social stimulation. SAD patients displayed increased amygdala reactivity to fearful as compared to neutral facial pictures, but not in response to generally aversive but mainly non-social stimulation when compared to neutral pictorial stimuli taken from the International Affective Picture System. The increased amygdala reactivity was not mediated by an altered prefrontal inhibition among SAD patients as compared to controls, suggesting increased bottom-up processes rather than attenuated top-down control. In conclusion, the enhanced amygdala reactivity in SAD seems specific to socially relevant stimuli rather than aversive stimuli in general.

Place, publisher, year, edition, pages
2018. Vol. 280, p. 56-61
Keywords [en]
social phobia, emotional faces, International Affective Picture System, IAPS, fMRI, fear
National Category
Psychology
Research subject
Psychology
Identifiers
URN: urn:nbn:se:su:diva-160388DOI: 10.1016/j.pscychresns.2018.08.012ISI: 000443824900008OAI: oai:DiVA.org:su-160388DiVA, id: diva2:1250050
Available from: 2018-09-21 Created: 2018-09-21 Last updated: 2018-10-15Bibliographically approved

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