Prefrontal and amygdala engagement during emotional reactivity and regulation in generalized anxiety disorder

Jacklynn M. Fitzgerald*, K. Luan Phan, Amy E. Kennedy, Stewart A Shankman, Scott A. Langenecker, Heide Klumpp

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

23 Scopus citations

Abstract

Background Emotion dysregulation is prominent in generalized anxiety disorder (GAD), characterized clinically by exaggerated reactivity to negative stimuli and difficulty in down-regulating this response. Although limited research implicates frontolimbic disturbances in GAD, whether neural aberrations occur during emotional reactivity, regulation, or both is not well understood. Methods During functional magnetic resonance imaging (fMRI), 30 individuals with GAD and 30 healthy controls (HC) completed a well-validated explicit emotion regulation task designed to measure emotional reactivity and regulation of reactivity. During the task, participants viewed negative images (‘Look-Negative’ condition) and, on some trials, used a cognitive strategy to reduce negative affective response (‘Reappraise’ condition). Results Results from an Analysis of Variance corrected for whole brain multiple comparisons showed a significant group x condition interaction in the left amygdala and left inferior frontal gyrus (IFG). Results from post-hoc analyses showed that the GAD group engaged these regions to a greater extent than HCs during Look-Negative but not Reappraise. Behaviorally, the GAD group reported feeling more negative than the HC group in each condition, although both groups reported reduced negative affect following regulation. Limitations As comorbidity was permitted, the presence of concurrent disorders, like other anxiety disorders and depression, detracts our ability to classify neural engagement particular to GAD alone. Conclusions Individuals with GAD exhibited over-engagement of amygdala and frontal regions during the viewing of negative images, compared to HCs. Together, these aberrations may indicate that deficits in emotional reactivity rather than regulation contribute to emotion dysregulation in those with GAD.

Original languageEnglish (US)
Pages (from-to)398-406
Number of pages9
JournalJournal of Affective Disorders
Volume218
DOIs
StatePublished - Aug 15 2017

Keywords

  • Affect
  • Emotion regulation
  • Generalized anxiety disorder
  • Reappraisal
  • fMRI

ASJC Scopus subject areas

  • Clinical Psychology
  • Psychiatry and Mental health

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