种族歧视相关的互感网络中断:通往断开连接的途径
Aziz Elbasheir1, Rachel Bond1, Nathaniel G Harnett2
1Department of Psychiatry and Behavioral Sciences, Emory University School of Medicine, Atlanta, Georgia.
Biological psychiatry. Cognitive neuroscience and neuroimaging
|December 29, 2024
概括
种族歧视的频率与黑人女性大脑连接能力的减少有关,这可能解释了分离. 这凸显了歧视如何影响整体感知和心身连接.
科学领域:
- 神经科学是一个神经科学.
- 心理学 心理学 心理学
- 社会学 社会学 社会学
背景情况:
- 种族歧视 (RD) 破坏了监管系统,特别是注意力和感觉.
- RD与生理关闭反应有关,临床上称为分离.
- 这项研究侧重于遭受创伤的黑人女性,这一群体不成比例地受到RD的影响.
研究的目的:
- 检查种族歧视频率与注意力和感知网络中的功能连接性之间的关联.
- 调查网络连接和离散症状的严重程度之间的关系.
- 探索RD,整感应和生理关闭反应之间的潜在联系.
主要方法:
- 72名黑人女性在Stroop情感任务中完成了神经成像 (fMRI).
- 一般化心理生理学相互作用分析检查了功能连接 (杏仁体,胰岛素种子) 与RD作为回归因子.
- 在与威胁相关的与中性刺激之间分析了连接性,并与解离和PTSD症状相关.
主要成果:
- 在对威胁的关注期间,较高的RD频率与减少的岛屿连接到中部前额叶皮层 (mPFC) 集群相关.
- 胰岛-mPFC连接与脱现症状负相关 (r = -0.31,p = .009).
- 在insula-mPFC连接和PTSD症状之间没有发现显著的关联 (r = -0.16,p = .182).
结论:
- 种族歧视的频率与insula和mPFC之间功能连接的减少有关,这些是整体感网络中的关键节点.
- 降低胰岛-mPFC连接性与分离性症状的严重程度增加有关,特别是脱意识.
- 这些发现表明,RD可能会损害整感觉网络功能,导致黑人人体和生理关闭.
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