JMRI:OFC和dmPFC功能连接可能与重度抑郁症患者自杀行为风险有关

2021-06-26 MedSci原创 MedSci原创

OFC和dmPFC连接的改变可能与冲动、决策和自我参照加工的神经中断有关,并可能导致MDD患者出现更高的自杀行为风险,从而在回路水平上扩展了对自杀行为的理解。

流行病学研究的证据表明,与普通人群相比,重度抑郁症(MDD)患者自杀未遂的风险增加了5倍。预防早发性自杀未遂已被确定为国家精神卫生研究所的一项任务。尽管在了解自杀行为的流行病学和危险因素方面取得了进展,但对可能导致自杀行为的病理生理过程仍知之甚少。研究MDD患者自杀未遂的脑机制,有助于理解MDD患者的自杀行为,提高对MDD患者自杀预防策略的认识。重度抑郁障碍(MDD)自杀未遂的内在脑功能联系尚不完全清楚。 华西医院龚启勇团队最近在JMRI杂志发表文章,探讨MDD患者自杀行为中基于图论的功能连接强度(FCS)的改变。 受试者包括50例无药物治疗的MDD患者,有(自杀未遂者,SA,N=15)和无(非自杀未遂者,nSA,N=35)自杀未遂史,37例健康对照组(HC)。采用3.0 T梯度回波成像序列采集静息态功能磁共振成像(fMRI)。对每个个体进行评估,采用构建基于体素的全脑功能网络,计算基于图论的FCS图。对于两个患者组中的每个个体,构建基于种子的功能连接图。统计检验:非参数排列检验、协方差分析、双样本t检验、卡方检验、皮尔逊相关分析。P值<0.05被认为具有统计学意义。 受试对象临

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    2021-10-11 zhixianchen
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