在长期悲伤障碍中以杏仁核为中心的情绪处理:与临床症状学的关系
Gyujoon Hwang1, Nutta-On P Blair1, B Douglas Ward1
1Department of Psychiatry and Behavioral Medicine, Medical College of Wisconsin, Milwaukee, Wisconsin.
Biological psychiatry. Cognitive neuroscience and neuroimaging
|December 26, 2024
概括
长期悲伤障碍 (PGD) 的老年人表现出桃体对负面刺激的反应性增加,与侵入性思想有关. 在PGD中大脑连接的差异可能解释了回避和孤独,这表明了治疗的目标.
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.
- 老年学是一门学科.
背景情况:
- 长期悲伤障碍 (PGD) 是一种影响健康的复杂疾病.
- 假设增强的负面情绪偏见是PGD症状的基础.
研究的目的:
- 调查PGD老年人和整合悲伤的老年人之间的情绪处理的神经差异.
- 探索大脑活动,功能连接和PGD临床症状之间的关系.
主要方法:
- 横截面研究比较了可能患有PGD的老年人 (n=33) 和综合悲伤 (n=38).
- fMRI情感面部匹配任务,以评估神经反应和功能连接 (FC).
- 杏仁体,胰岛体,ACC和dlPFC活动的分析,以及全脑回归.
主要成果:
- 在PGD组,对负面刺激的右桃体活化更大,与侵入性思想相关.
- 在PGD中,右桃体和后带皮层/前皮层之间的下静止状态FC与避免有关.
- 在PGD中,右桃体和丘脑之间增加了静止状态的FC,与孤独有关.
结论:
- 在老年人中,失调的桃体中心神经活动和长期CF与综合悲伤的区别.
- 这些发现表明PGD中增强了负偏见和相关的神经机制.
- 准桃体中心的神经回路异常可能为PGD治疗策略提供信息.
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