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Abnormal resting-state brain activities in patients with first-episode obsessive-compulsive disorder

Authors Niu Q, Yang L, Song X, Chu C, Liu H, Zhang L, Li Y, Zhang X, Cheng J, Li Y

Received 18 July 2016

Accepted for publication 11 October 2016

Published 16 February 2017 Volume 2017:13 Pages 507—513


Checked for plagiarism Yes

Review by Single anonymous peer review

Peer reviewer comments 3

Editor who approved publication: Professor Wai Kwong Tang

Qihui Niu,1,* Lei Yang,1,* Xueqin Song,1 Congying Chu,2 Hao Liu,1 Lifang Zhang,1 Yan Li,1 Xiang Zhang,1 Jingliang Cheng,1 Youhui Li1

1Department of Psychiatry, The First Affiliated Hospital, Zhengzhou University, Zhengzhou, 2Brainnetome Certer, Institute of Automation, Chinese Academy of Sciences, Beijing, People’s Republic of China

*These authors contributed equally to this work

Objective: This paper attempts to explore the brain activity of patients with obsessive-­compulsive disorder (OCD) and its correlation with the disease at resting duration in patients with first-episode OCD, providing a forceful imaging basis for clinic diagnosis and pathogenesis of OCD.
Methods: Twenty-six patients with first-episode OCD and 25 healthy controls (HC group; matched for age, sex, and education level) underwent functional magnetic resonance imaging (fMRI) scanning at resting state. Statistical parametric mapping 8, data processing assistant for resting-state fMRI analysis toolkit, and resting state fMRI data analysis toolkit packages were used to process the fMRI data on Matlab 2012a platform, and the difference of regional homogeneity (ReHo) values between the OCD group and HC group was detected with independent two-sample t-test. With age as a concomitant variable, the Pearson correlation analysis was adopted to study the correlation between the disease duration and ReHo value of whole brain.
Results: Compared with HC group, the ReHo values in OCD group were decreased in brain regions, including left thalamus, right thalamus, right paracentral lobule, right postcentral gyrus, and the ReHo value was increased in the left angular gyrus region. There was a negative correlation between disease duration and ReHo value in the bilateral orbitofrontal cortex (OFC).
Conclusion: OCD is a multifactorial disease generally caused by abnormal activities of many brain regions at resting state. Worse brain activity of the OFC is related to the OCD duration, which provides a new insight to the pathogenesis of OCD.

Keywords: OCD, resting state, functional MRI, regional homogeneity

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