Altered spontaneous activity and effective connectivity of the anterior cingulate cortex in obsessive-compulsive disorder.
Adolescent
Adult
Excitatory Postsynaptic Potentials
/ physiology
Female
Gyrus Cinguli
/ diagnostic imaging
Humans
Inhibitory Postsynaptic Potentials
/ physiology
Magnetic Resonance Imaging
/ methods
Male
Middle Aged
Nerve Net
/ diagnostic imaging
Obsessive-Compulsive Disorder
/ diagnostic imaging
Young Adult
Granger causality analysis
RRID:SCR_002372
RRID:SCR_002865
RRID:SCR_007037
RRID:SCR_009605
RRID:SCR_009641
anterior cingulate cortex
effective connectivity
obsessive-compulsive disorder
resting-state functional MRI
Journal
The Journal of comparative neurology
ISSN: 1096-9861
Titre abrégé: J Comp Neurol
Pays: United States
ID NLM: 0406041
Informations de publication
Date de publication:
02 2021
02 2021
Historique:
received:
16
01
2020
revised:
25
04
2020
accepted:
07
05
2020
pubmed:
19
5
2020
medline:
17
12
2021
entrez:
19
5
2020
Statut:
ppublish
Résumé
Obsessive-compulsive disorder (OCD) is a disabling neuropsychiatric disorder whose neurobiological basis remains unclear. Magnetic resonance imaging (MRI) studies have reported functional and structural alterations of the anterior cingulate cortex (ACC) in OCD. In this study, we explored the functional activity of subregions of the ACC and effective connectivity (EC) between ACC subregions and the whole brain in OCD. We used a Granger causality analysis (GCA) to identify the direction of information flow and whether the impact of that flow was excitatory or inhibitory. We performed resting-state functional MRI in 31 patients with OCD and 36 healthy controls and analyzed the amplitude of low-frequency fluctuation (ALFF) and coefficient-based GCA. The left pregenual ACC (pACC) in patients with OCD showed decreased ALFF relative to controls. There was significantly decreased excitatory output from the left pACC to both right dorsal superior frontal gyrus (dSFG) and left precuneus in patients compared with controls. Patients also had decreased inhibitory input to left pACC from left ventral SFG and left thalamus and caudate relative to controls. Results were similar in drug-naive patients and those with prior but not current psychopharmacological treatment. In patients, path coefficients of GCA from left pACC to right dSFG showed significant negative correlations with obsession and anxiety ratings. Decreased spontaneous neural activity and altered EC of pACC with widely distributed cortical circuitry, and associations with clinical ratings highlight the importance of pACC functional alteration in OCD.
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
296-310Informations de copyright
© 2020 Wiley Periodicals, Inc.
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