大脑体积减少和与老年人抑郁症和认知功能在自杀中的关系:使用贝叶斯多层次建模的横截面和纵向研究
Vanessa M Brown1,2, Swathi Gujral1, Ya-Wen Chang1
1Department of Psychiatry, University of Pittsburgh, Pittsburgh, Pennsylvania.
Biological psychiatry global open science
|August 8, 2025
概括
有过自杀尝试或抑郁史的老年人表现出明显的脑容量变化,特别是在海马体. 这些发现突出了与晚年自杀风险和痴呆症相关的神经认知缺陷.
科学领域:
- 神经科学是一个神经科学.
- 老年学是一门学科.
- 精神病学是一个精神病学.
背景情况:
- 老年人患有认知障碍的抑郁症可以预示早期痴呆症并增加自杀风险.
- 这些障碍的神经解剖相关性,特别是纵向变化,仍然在很大程度上是未知的.
研究的目的:
- 为了研究与老年人自杀企图,抑郁症和认知障碍史有关的大脑体积的神经解剖学差异.
- 为了检查与这些因素有关的大脑体积的纵向变化.
主要方法:
- 结构磁共振成像 (MRI) 扫描从153名有自杀未遂,抑郁或没有精神病史的老年人中获得.
- 贝叶斯多层次建模用于分析大脑体积的横截面和前性变化,控制自杀尝试史,抑郁症严重程度和认知功能.
- 51名参与者接受了多次MRI扫描,以评估纵向变化.
主要成果:
- 自杀企图的历史和执行功能受损与部,部,部区域和海马体的体积减少有关.
- 抑郁症,特别是当前发作的严重程度,与前脑和皮层下脑体积的减少有关.
- 皮质痴呆症特征的认知障碍预测了中间时体积的减少.
结论:
- 老年人的自杀行为,抑郁症和痴呆症相关的认知衰退与不同但融合的区域的大脑体积减少有关,特别是海马.
- 海马可以作为与抑郁症,自杀风险和神经退行相关的同时发生变化的中心点.
- 这些发现表明,老年人有晚年自杀风险的明显神经认知缺陷,并强调了解海马体结构对于风险预测和治疗开发的重要性.
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