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Beyond acute social stress: increased functional connectivity between amygdala and cortical midline structures.

Abstract：

:Whereas we know a fair amount on the role of the amygdala in the acute stress response, virtually nothing is known about its role during the recovery period after the stress has waned. Functional connectivity analysis of the amygdala during this period might be useful in revealing brain circuits promoting adaptive recovery from a stressful event, as well as consolidation of emotionally relevant information in preparing for future challenges. Healthy participants were randomly assigned to either a psychosocial stress task (n=18; stress group) or a comparable non-stressful control procedure (n=20; controls). To study the prolonged effects of stress on amygdala functional connectivity, resting-state fMRI scans were acquired an hour after the stress task. Amygdala functional connectivity with other brain regions was assessed using seed-based correlations. The stress group exhibited a strong physiological and behavioral reaction to psychosocial stress exposure. Compared with controls the stress group showed increased amygdala functional connectivity with three cortical midline structures: the posterior cingulate cortex and precuneus (p<.05, corrected), and the medial prefrontal cortex (p<.05, small volume corrected). An hour after psychosocial stress, changes in amygdala functional connectivity were detected with cortical midline structures involved in the processing and regulation of emotions, as well as autobiographical memory. It is hypothesized that these effects could relate to top-down control of the amygdala and consolidation of self-relevant information after a stressful event. These results on functional connectivity in the recovery phase after stress might provide an important new vantage point in studying both sensitivity and resilience to stress.

journal_name

Neuroimage

journal_title

NeuroImage

authors

Veer IM,Oei NY,Spinhoven P,van Buchem MA,Elzinga BM,Rombouts SA

doi

10.1016/j.neuroimage.2011.05.074

subject

Has Abstract

pub_date

2011-08-15 00:00:00

pages

1534-41

issue

4

eissn

1053-8119

issn

1095-9572

pii

S1053-8119(11)00599-4

journal_volume

57

pub_type

杂志文章,随机对照试验

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