A systematic review of fMRI studies in generalized anxiety disorder: evaluating its neural and cognitive basis
Language: 
English
Short Title: 
A systematic review of fMRI studies in generalized anxiety disorder
Abstract: 

BACKGROUND: Generalized anxiety disorder (GAD) is a prevalent anxiety disorder, but its neurobiological basis has been poorly studied. A few cognitive models have been proposed for understanding GAD development and maintenance. The aim of this study is to review functional Magnetic Resonance Image (fMRI) studies conducted with GAD patients and evaluate if they support and underpin the theoretical cognitive models proposed for this anxiety disorder. METHODS: A literature systematic review was undertaken in PubMed and ISI databases with no time limits. RESULTS: From the studies included in this review, 10 explored the "emotional dysregulation model", showing, prefrontal cortex (PFC) and anterior cingulate cortex (ACC) hypofunction and deficient top-down control system during emotion regulation tasks, despite conflicting techniques and results. Only one study explored the "conditioned fear overgeneralization theory", other the "intolerance of uncertainty model" and two studies were unspecific (worry induction tasks). Between those, there were 4 studies evaluating pre- and post-treatment with antidepressants or "mindfulness". LIMITATIONS: The studies? methodologies differ between one another making it difficult to identify a common finding. CONCLUSION: Emotion dysregulation seems to be an important cognitive dysfunction in GAD patients and fMRI studies suggest that it is related to PFC and ACC hypofunction as well as a deficient cortex-amygdala functional connectivity.

Author(s): 
Mochcovitch, Marina Dyskant
da Rocha Freire, Rafael Christophe
Garcia, Rafael Ferreira
Nardi, Antonio E.
Item Type: 
Journal Article
Publication Title: 
Journal of Affective Disorders
Journal Abbreviation: 
J Affect Disord
Publication Date: 
2014
Publication Year: 
2014
Pages: 
336-342
Volume: 
167
ISSN: 
1573-2517
DOI: 
10.1016/j.jad.2014.06.041
Library Catalog: 
PubMed
Extra: 
PMID: 25020268

Turabian/Chicago Citation

Marina Dyskant Mochcovitch, Rafael Christophe da Rocha Freire, Rafael Ferreira Garcia and Antonio E. Nardi. 2014. "A systematic review of fMRI studies in generalized anxiety disorder: evaluating its neural and cognitive basis." Journal of Affective Disorders 167: 336-342. 10.1016/j.jad.2014.06.041.

Wikipedia Citation

<ref> {{Cite journal | doi = 10.1016/j.jad.2014.06.041 | issn = 1573-2517 | volume = 167 | pages = 336-342 | last = Mochcovitch | first = Marina Dyskant | coauthors = da Rocha Freire, Rafael Christophe, Garcia, Rafael Ferreira, Nardi, Antonio E. | title = A systematic review of fMRI studies in generalized anxiety disorder: evaluating its neural and cognitive basis | journal = Journal of Affective Disorders | date = 2014 | pmid = | pmc = }} </ref>