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Randomized Controlled Trial
. 2019 Feb 28:284:13-20.
doi: 10.1016/j.pscychresns.2018.12.017. Epub 2019 Jan 2.

Self-referential processing during observation of a speech performance task in social anxiety disorder from pre- to post-treatment: Evidence of disrupted neural activation

Affiliations
Randomized Controlled Trial

Self-referential processing during observation of a speech performance task in social anxiety disorder from pre- to post-treatment: Evidence of disrupted neural activation

Lily A Brown et al. Psychiatry Res Neuroimaging. .

Abstract

Self-referential processing is critical to understanding social anxiety disorder (SAD). This study examined neural differences in self-referential processing in healthy controls (HC) and participants with SAD at pre- and post-treatment. Participants (n = 64) underwent fMRI scanning while viewing a video of themselves ("Self") or another person ("Other"). SAD participants were randomized to cognitive behavior therapy (CBT), acceptance and commitment therapy (ACT), or waitlist, and were re-scanned at post-treatment. In SAD vs. HC, the fusiform face area (FFA) showed significantly more activation during Self vs. Other, and greater SAD severity was associated with significantly more activation during Self vs. Other in the right FFA and the left extrastriate body area (EBA). Greater reduction in SAD severity was associated with stronger connectivity between the amygdala and FFA during Self vs. Other at post-treatment, whereas the strength of connectivity during Self and Other was comparable at post-treatment for those with less SAD reduction. Thus, there were significant differences in activation and functional connectivity of brain regions implicated in self-referential processing in SAD. Change in connectivity between the amygdala and FFA were observed as a function of change in SAD severity, suggesting that improvements in SAD severity may correct this altered functional connectivity.

Keywords: Acceptance and commitment therapy; Cognitive behavior therapy; Self-referential processing; Social anxiety disorder.

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Conflict of interest statement

Conflicts of Interest: Drs. Craske, Brown, Lieberman, Young and Goldin reported receiving funding from the National Institute of Health. Dr. Brown reported receiving funding from the Department of Defense.

Figures

Figure 1.
Figure 1.
Pre-treatment correlation between social anxiety severity (LSAS) and fusiform face area (FFA) and extrastriate body area (EBA) activation Note. Panel A depicts neural activation when the LSAS was entered as a regressor. Panel B depicts the association between the right FFA for Self – Other correlated with LSAS. Panel C depicts the association between the left EBA for Self – Other correlated with LSAS.
Figure 2.
Figure 2.
Pre-treatment functional connectivity with the right amygdala as a seed region for the socially anxious (SAD) and healthy control (HC) groups Note: Panel A depicts the functional connectivity between right amygdala and right insula differences for SAD vs. HC. Panel B depicts the right amygdala and right insula connectivity strength for Self – Other for SAD and HC.
Figure 3.
Figure 3.
Pre- to post-treatment left insula activation during self- versus other-referential processing in the treatment and waitlist groups
Figure 4.
Figure 4.
Right amygdala to ventromedial prefrontal cortex (VMPFC) connectivity

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