Systematic review and meta-analyses of neural structural and functional differences in generalized anxiety disorder and healthy controls using magnetic resonance imaging

Autor: Alyssia D. Wilson, Tiffany A. Kolesar, Jennifer Kornelsen, Elena Bilevicius
Jazyk: angličtina
Rok vydání: 2019
Předmět:
medicine.medical_specialty
Generalized anxiety disorder
Cognitive Neuroscience
Functional magnetic resonance imaging
Review Article
computer.software_genre
lcsh:Computer applications to medicine. Medical informatics
050105 experimental psychology
lcsh:RC346-429
03 medical and health sciences
0302 clinical medicine
Physical medicine and rehabilitation
Voxel
Connectome
Medicine
Humans
0501 psychology and cognitive sciences
Radiology
Nuclear Medicine and imaging
10. No inequality
Default mode network
lcsh:Neurology. Diseases of the nervous system
Cerebral Cortex
Resting state fMRI
Supplementary motor area
medicine.diagnostic_test
business.industry
05 social sciences
medicine.disease
Amygdala
Anxiety Disorders
Magnetic Resonance Imaging
Meta-analysis
medicine.anatomical_structure
Neurology
Sample size determination
Systematic review
lcsh:R858-859.7
Neurology (clinical)
Nerve Net
business
computer
030217 neurology & neurosurgery
Zdroj: NeuroImage : Clinical
NeuroImage: Clinical, Vol 24, Iss, Pp-(2019)
ISSN: 2213-1582
Popis: Highlights • PFC-amygdala FC is altered in GAD, indicating top-down processing deficits. • GAD had reduced activity for emotion regulation and working memory in the culmen. • Salience, default, and central executive nodes have altered structure and function.
Objective To compare structure, functional connectivity (FC) and task-based neural differences in subjects with generalized anxiety disorder (GAD) compared to healthy controls (HC). Methods The Embase, Ovid Medline, PsycINFO, Scopus, and Web of Science databases were searched from inception until March 12, 2018. Two reviewers independently screened titles, abstracts, and full-text articles. Data were extracted from records directly contrasting GAD and HC that included structure (connectivity and local indices such as volume, etc.), FC, or task-based magnetic resonance imaging data. Meta-analyses were conducted, as applicable, using AES-SDM software. Results The literature search produced 4,645 total records, of which 85 met the inclusion criteria for the systematic review. Records included structural (n = 35), FC (n = 33), and task-based (n = 42) findings. Meta-analyses were conducted on voxel-based morphometry and task-based results. Discussion The systematic review confirms and extends findings from previous reviews. Although few whole-brain resting state studies were conducted, key nodes of resting state networks have altered physiology: the hippocampus (default network), ACC and amygdala (salience network), have reduced volume, and the dlPFC (central executive network) and ACC have reduced FC with the amygdala in GAD. Nodes in the sensorimotor network are also altered with greater pre- and postcentral volume, reduced supplementary motor area volume, and reduced FC in anterior and increased FC in posterior cerebellum. Conclusions Despite limitations due to sample size, the meta-analyses highly agree with the systematic review and provide evidence of widely distributed neural differences in subjects with GAD, compared to HC. Further research optimized for meta-analyses would greatly improve large-scale comparisons.
Databáze: OpenAIRE
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