慢性耳鸣伴抑郁情绪患者杏仁核与前额叶-扣带回-颞叶回路的功能连接中断。

Amygdala functional disconnection with the prefrontal-cingulate-temporal circuit in chronic tinnitus patients with depressive mood.

机构信息

Department of Radiology, Nanjing First Hospital, Nanjing Medical University, Nanjing, China.

Department of Radiology, Nanjing First Hospital, Nanjing Medical University, Nanjing, China.

出版信息

Prog Neuropsychopharmacol Biol Psychiatry. 2017 Oct 3;79(Pt B):249-257. doi: 10.1016/j.pnpbp.2017.07.001. Epub 2017 Jul 5.

Abstract

Chronic tinnitus is often accompanied with depressive symptom, which may arise from aberrant functional coupling between the amygdala and cerebral cortex. To explore this hypothesis, resting-state functional magnetic resonance imaging (fMRI) was used to investigate the disrupted amygdala-cortical functional connectivity (FC) in chronic tinnitus patients with depressive mood. Chronic tinnitus patients with depressive mood (n=20), without depressive mood (n=20), and well-matched healthy controls (n=23) underwent resting-state fMRI scanning. Amygdala-cortical FC was characterized using a seed-based whole-brain correlation method. The bilateral amygdala FC was compared among the three groups. Compared to non-depressed patients, depressive tinnitus patients showed decreased amygdala FC with the prefrontal cortex and anterior cingulate cortex as well as increased amygdala FC with the postcentral gyrus and lingual gyrus. Relative to healthy controls, depressive tinnitus patients revealed decreased amygdala FC with the superior and middle temporal gyrus, anterior and posterior cingulate cortex, and prefrontal cortex, as well as increased amygdala FC with the postcentral gyrus and lingual gyrus. The current study identified for the first time abnormal resting-state amygdala-cortical FC with the prefrontal-cingulate-temporal circuit in chronic tinnitus patients with depressive mood, which will provide novel insight into the underlying neuropathological mechanisms of tinnitus-induced depressive disorder.

摘要

慢性耳鸣常伴有抑郁症状,这可能源于杏仁核和大脑皮层之间功能连接的异常。为了验证这一假说,本研究采用静息态功能磁共振成像(rs-fMRI)技术,探讨伴有抑郁情绪的慢性耳鸣患者杏仁核-皮质功能连接(FC)的改变。纳入伴有抑郁情绪的慢性耳鸣患者(n=20)、不伴有抑郁情绪的慢性耳鸣患者(n=20)和年龄、性别相匹配的健康对照者(n=23),进行静息态 fMRI 扫描。采用基于种子点的全脑相关分析方法,分析杏仁核与脑区的功能连接。比较三组间双侧杏仁核的 FC。与不伴抑郁的耳鸣患者相比,伴抑郁的耳鸣患者表现为与前额叶皮质和前扣带回的杏仁核 FC 降低,与中央后回和舌回的杏仁核 FC 增加。与健康对照组相比,伴抑郁的耳鸣患者表现为与颞中回、前后扣带回、前额叶皮质的杏仁核 FC 降低,与中央后回和舌回的杏仁核 FC 增加。本研究首次发现伴有抑郁情绪的慢性耳鸣患者存在与前额叶-扣带回-颞叶回路相关的静息态杏仁核功能连接异常,为耳鸣导致抑郁障碍的潜在神经病理机制提供了新的见解。

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