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Disrupted dynamic local brain functional connectivity patterns in generalized anxiety disorder.

Abstract：

:Previous studies have reported abnormalities in static brain activity and connectivity in patients with generalized anxiety disorder (GAD). However, the dynamic patterns of brain connectivity in patients with GAD have not been fully explored. In this study, we aimed to investigate the dynamic local brain functional connectivity in patients with GAD using dynamic regional phase synchrony (DRePS), a newly developed method for assessing intrinsic dynamic local functional connectivity. Seventy-four patients with GAD and 74 healthy controls (HCs) were enrolled and underwent resting-state functional magnetic resonance imaging. Compared to the HCs, patients with GAD exhibited decreased DRePS values in the bilateral caudate, left hippocampus, left anterior insula, left inferior frontal gyrus, and right fusiform gyrus extending to inferior temporal gyrus. The DRePS value of the left hippocampus was negatively correlated with the Hamilton Anxiety Rating Scale scores. Moreover, these abnormal DRePS patterns could be used to distinguish patients with GAD from HCs in an independent sample (18 patients with GAD and 21 HCs). Our findings provide further evidence on brain dysfunction in GAD from the perspective of the dynamic behaviour of local connections, suggesting that patients with GAD may have an insufficient brain adaptation. This study provides new insights into the neurocognitive mechanism of GAD and could potentially inform the diagnosis and treatment of this disease. Future studies on GAD could benefit from combining the DRePS method with task-related functional magnetic resonance imaging and non-invasive brain stimulation.

journal_name

Prog Neuropsychopharmacol Biol Psychiatry

journal_title

Progress in neuro-psychopharmacology & biological psychiatry

authors

Cui Q,Chen Y,Tang Q,Han S,Hu S,Pang Y,Lu F,Nan X,Sheng W,Shen Q,Wang Y,He Z,Chen H

doi

10.1016/j.pnpbp.2019.109833

subject

Has Abstract

pub_date

2020-04-20 00:00:00

pages

109833

eissn

0278-5846

issn

1878-4216

pii

S0278-5846(19)30242-8

journal_volume

99

pub_type

杂志文章

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