增加的大脑核在忧郁抑郁症中增加了功能连接
Zhaobin Chen1, Yangpan Ou1, Feng Liu2
1Department of Psychiatry, National Clinical Research Center for Mental Disorders, and National Center for Mental Disorders, The Second Xiangya Hospital of Central South University, Changsha 410011, Hunan, China.
Neuropharmacology
|November 23, 2023
概括
与非忧郁抑郁症相比,忧郁抑郁症表现出明显的奖励回路功能连接 (FC) 差异. 这些发现突显了奖励回路.
科学领域:
- 神经科学是一个神经科学.
- 精神病学是一个精神病学.
- 医疗成像医学成像
背景情况:
- 忧郁抑郁症,以无情感为特征,通常被视为主要抑郁障碍 (MDD) 的一个独特的亚型.
- 忧郁抑郁症的潜在神经机制仍未得到充分研究.
- 这项研究侧重于奖励回路的功能连接,与忧郁抑郁症中的无情有关.
研究的目的:
- 为了研究忧郁抑郁症中奖励回路的功能连接模式.
- 为了确定忧郁和非忧郁抑郁症亚型之间的神经差异.
- 探索奖励回路在忧郁抑郁症神经病理学中的作用.
主要方法:
- 使用休息状态功能性磁共振成像 (rs-fMRI) 对59名首发,未服用药物的大型抑郁症 (MDD) 患者 (31名忧郁症患者,28名非忧郁症患者) 和32名健康对照.
- 定义双边的核 accumbens (NAc) 作为种子区域,以分析奖励网络中的功能连接 (FC).
- 使用支持矢量机器 (SVM) 分析,根据FC模式区分忧郁症和非忧郁症患者群.
主要成果:
- 与非忧郁症患者相比,忧郁症患者在双边核 (NAc) 和右中额头 (MFG) 之间,以及右NAc和左小脑叶VIII之间增加了FC.
- 与对照者相比,忧郁症患者在右NAc和右舌环之间,以及左NAc和左后中心环之间显示出加剧的FC.
- 支持矢量机器分析表明,左NAc和右MFG之间的FC可以有效地区分忧郁和非忧郁抑郁症.
结论:
- 与非忧郁抑郁症相比,忧郁抑郁症与奖励回路内的独特功能连接模式有关.
- 这些发现强调了奖励回路在忧郁抑郁症神经病理学中的关键参与.
- 这项研究提供了神经生物学证据,区分了忧郁抑郁症亚型.
相关概念视频
01:18Depression: Overview
254
Depression is a prevalent mental illness marked by persistent sadness and lack of interest in previously enjoyable activities. It can take several forms, including major depression, persistent depressive disorder, and bipolar I and II disorders. Symptoms range from emotional changes like chronic worry to physical changes like sleep disturbances and suicidal thoughts. From a neurobiological perspective, depression is believed to be triggered by abnormalities in the brain's prefrontal cortex,...
254
01:23Antidepressant Drugs: MAOIs and Other Agents
248
Atypical antidepressants, including bupropion (Wellbutrin), mirtazapine (Remeron), nefazodone (Serzone), trazodone (Desyrel), and vilazodone (Viibryd), offer unique mechanisms of action. Bupropion weakly inhibits dopamine and norepinephrine reuptake, aiding depression treatment and smoking cessation, with a low risk of sexual dysfunction. Mirtazapine enhances serotonin and norepinephrine neurotransmission, leading to sedation, increased appetite, and weight gain. As a result, it helps treat...
248
01:05Long-term Depression
30.9K
Long-term depression, or LTD, is one of the ways by which synaptic plasticity—changes in the strength of chemical synapses—can occur in the brain. LTD is the process of synaptic weakening that occurs over time between pre and postsynaptic neuronal connections. The synaptic weakening of LTD works in opposition to synaptic strengthening by long-term potentiation (LTP) and together are the main mechanisms that underlie learning and memory.
30.9K
01:13Functional Brain Systems: Reticular Formation
2.0K
The reticular formation is a complex network of gray and white matter located within the brainstem extending from the medulla to the midbrain.
Within the reticular formation, there are several distinct nuclei that can be classified into three broad categories. The Raphe nuclei are located along the midline of the brainstem. They are primarily known for their role in synthesizing and releasing serotonin, a neurotransmitter involved in regulating mood, appetite, sleep, and circadian rhythms. The...
Within the reticular formation, there are several distinct nuclei that can be classified into three broad categories. The Raphe nuclei are located along the midline of the brainstem. They are primarily known for their role in synthesizing and releasing serotonin, a neurotransmitter involved in regulating mood, appetite, sleep, and circadian rhythms. The...
2.0K