像特征的视觉皮层过度活动在特征焦虑中
Zhaohan Wu1, Yuqi You1,2, Joshua A Brown3
1Department of Psychology, Florida State University, Tallahassee, FL, USA.
Nature communications
|December 20, 2025
概括
特征焦虑与早期视觉处理区域的活性增加有关. 这种视觉过度活跃,是特定于细胞通路的,发生得很快,并且在高焦虑的个体中不受兴奋或刺激类型的调节.
科学领域:
- 神经科学是一个神经科学.
- 认知心理学 认知心理学
- 精神病学是一个精神病学.
背景情况:
- 感官处理差异,特别是过敏,与情绪特征和精神疾病有关.
- 现有的理论经常将感官情绪处理与边缘或前额叶大脑区域联系起来,但经验证据很少.
- 新兴研究表明,感官皮质本身动态编码价值,挑战传统的标记线理论.
研究的目的:
- 调查特征焦虑与感官处理之间的联系的神经基础.
- 为了确定早期视觉皮层活动是否在高特征焦虑的个体中不同.
- 探索皮质刺激-抑制平衡在调节与焦虑相关的感官反应中的作用.
主要方法:
- 进行了四次高密度脑电图 (EEG) 实验,并进行了重复评估.
- 分析视觉皮层活动,特别关注早期视觉处理 (V1/V2) 和细胞通路.
- 使用EEG无周期指数 (1/f斜率) 评估皮质刺激-抑制平衡,并将其与感官反应相关联.
主要成果:
- 在具有高特征焦虑症的个体中确定了一致的视觉皮层过度活动,最早在46 ms出现.
- 这种过度活跃性是特定于细胞视觉通路的,并且在不同的兴奋状态,刺激价值和图像复杂性中强大.
- 皮层刺激-抑制平衡预测了低焦虑个体的细胞反应,但不是高焦虑个体,这表明调制中断.
结论:
- 特征焦虑显著改变了早期的视觉处理,表现为帕沃细胞通路中的过度活跃.
- 这些发现表明,感官区域的皮层计算变化可能是个体对焦虑的倾向的基础.
- 结果强调了在焦虑障碍的神经生物学中考虑感官皮层功能的重要性.
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