在有自杀念头的大型抑郁症中,被破坏的静止状态桃体连接动态:对情绪失调和自杀风险的影响
Chengwen Liu1, Shulin Fang2, Chang Cheng3
1Cognition and Human Behavior Key Laboratory of Hunan Province, Department of Psychology, Hunan Normal University, Changsha, China; Medical Psychological Center, The Second Xiangya Hospital of Central South University, Changsha, Hunan, China.
Progress in neuro-psychopharmacology & biological psychiatry
|January 25, 2026
概括
重度抑郁症 (MDD) 与自杀念头 (SI) 显示了大脑网络动态的改变,特别是在杏仁体. 功能连接的这些干扰可能是情绪失调和自杀风险增加的基础.
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:
- 大型抑郁症 (MDD) 经常与自杀念头 (SI) 一起发生.
- 像杏仁体这样的调节情绪的大脑区域的功能障碍与SI的MDD有关.
- 在SI患有MDD患者中,基于杏仁体的功能连接的时间动态尚不清楚.
研究的目的:
- 为了研究基于杏仁体的功能连接的时间动态在第一集的MDD患者和没有自杀念头 (SI).
- 识别不同的网络状态及其与临床特征相关的动态指标.
- 评估这些动态指标在基于SI的个人分类方面的潜力.
主要方法:
- 休息状态功能性磁共振成像 (fMRI) 进行了第一期MDD患者的SI (n=53),没有SI (NSI,n=27) 和健康对照 (HCs,n=58).
- 协同激活模式 (CAP) 分析用于描述杏仁体连接动态,并确定五种不同的网络状态.
- 分析了这些网络状态的动态指标,并应用了支持向量机 (SVM) 分类.
主要成果:
- 与HC相比,SI和NSI组都表现出与杏仁体协同激活的情感网络 (AN) 的主导地位增加,与焦虑正相关.
- 该SI组显示,涉及默认模式网络 (DMN) 和奖励网络 (RN) 的短暂网络状态的发生率和弹性降低,与SI严重程度负相关.
- 动态CAP指标通过SVM分类有效地将SI个体与NSI和HC组区分开来.
结论:
- 具有SI的MDD的特征是AN的时间不稳定性增加,与过度焦虑情绪有关.
- 在SI患者中桃体-DMN-RN合的减少表明自我参考和奖励处理受损.
- 异常的杏仁基网络动态可能代表神经生物学基质的情绪失调和MDD中自杀风险升高.
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