创伤性压力会改变神经对视觉刺激的反应性
Nathaniel G Harnett1,2, Grace E Rowland2, E Kate Webb1,2
1Division of Depression and Anxiety, McLean Hospital, Belmont, MA USA.
NPP - digital psychiatry and neuroscience
|May 26, 2025
概括
创伤暴露会改变视觉皮层的功能,影响神经对视觉刺激的反应. 视觉处理中的这些变化可能与创伤后应激障碍 (PTSD) 的发展有关.
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.
- 视觉处理 视觉处理
背景情况:
- 创伤性压力是创伤后应激障碍 (PTSD) 的已知前体.
- 新兴的研究表明,视觉处理区域与PTSD发展有关.
- 以前的研究没有检查创伤暴露对神经对非情感视觉刺激的反应性的影响.
研究的目的:
- 研究近期创伤暴露对神经对基本视觉刺激反应的影响.
- 探索视觉处理变化与PTSD症状发展之间的关系.
主要方法:
- 功能性磁共振成像 (fMRI) 用于评估最近暴露于创伤 (RTE) 和非创伤暴露 (NRTE) 个体的大脑活动.
- 参与者看到了闪的棋盘刺激和注意力/休息条件的交替块.
- 在基线和创伤后6个月评估PTSD症状.
主要成果:
- 与NRTE参与者相比,RTE参与者在视觉皮层中表现出更大的失活.
- 与RTE参与者不同的是,NRTE参与者在视觉刺激期间显示出背中前额叶皮质神经反应的增加,与RTE参与者不同.
- 在NRTE中,视觉皮层与偏中心环的连接性在刺激期间更高,但不是RTE个体.
- 对视觉刺激的神经反应在RTE组中与PTSD症状负相关.
结论:
- 创伤暴露导致基本视觉处理的神经功能急性变化.
- 创伤后视觉电路功能的变化可能会影响PTSD症状的发展和表现.
更多相关视频
相关概念视频
01:27Post-traumatic Stress Disorder
486
Post-traumatic stress disorder (PTSD) is a psychiatric condition that arises following exposure to traumatic events such as natural disasters, forced displacement, or severe accidents. It significantly impairs individuals' ability to cope with daily activities and disrupts their emotional and psychological equilibrium.
Symptoms and Behavioral Manifestations
A spectrum of distressing symptoms characterizes PTSD. Recurrent flashbacks, where individuals involuntarily relive traumatic events,...
Symptoms and Behavioral Manifestations
A spectrum of distressing symptoms characterizes PTSD. Recurrent flashbacks, where individuals involuntarily relive traumatic events,...
486
01:20Traumatic Memory
552
Emotionally traumatic events often lead to memories that are exceptionally vivid and enduring, sometimes persisting with remarkable clarity throughout an individual's life. A classic example of this phenomenon is a person who survives a car accident. Even years later, they may recall every detail of the event with startling accuracy — the screeching of the tires, the jarring impact, and the acrid smell of burning rubber. Such vividness contrasts sharply with how an individual...
552
01:01Neuroplasticity
1.6K
Neuroplasticity reflects the brain's remarkable capacity to adapt and evolve, responding dynamically to learning, experiences, or injury by reorganizing its neural circuitry. This reorganization involves creating new neural connections and refining old ones through a series of biological processes that contribute to the brain's lifelong development and adaptability.
1.6K