Altered spontaneous activity and effective connectivity of the anterior cingulate cortex in obsessive–compulsive disorder

楔前 神经科学 扣带回前部 抑制性突触后电位 兴奋性突触后电位 功能磁共振成像 心理学 丘脑 生物 认知
作者
Jingyi Long,Lekai Luo,Yi Guo,Wanfang You,Qian Li,Bin Li,Wanjie Tang,Yanchun Yang,Graham J. Kemp,John A. Sweeney,Fei Li,Qiyong Gong
出处
期刊:Journal of comparative neurology [Wiley]
卷期号:529 (2): 296-310 被引量:14
标识
DOI:10.1002/cne.24948
摘要

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.
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