不需要无效试验来观察视网膜视觉皮层中基于对象的注意力的神经相关值
Taissa K Lytchenko1, Marvin Maechler2,3, Nathan Heller3
1University of Nevada.
Journal of cognitive neuroscience
|February 25, 2025
概括
基于对象的注意力 (OBA) 效应是自动和强制性的,而不仅仅是由于无效的线索. 即使有100%有效的提示,也发现了OBA的神经相关物,证明了其固有的性质.
科学领域:
- 认知神经科学 认知神经科学
- 视觉注意力研究 视觉注意力研究
- 神经成像研究研究 神经成像研究
背景情况:
- 基于对象的注意力 (OBA) 的自动性受到争论,研究结果经常被无效的提示试验所混.
- 之前的研究严重依赖于无效的提示试验,因此很难评估OBA是否真正是强制性的.
研究的目的:
- 通过使用100%有效的提示范式,研究基于对象的注意力 (OBA) 的强制性.
- 在没有无效试验的情况下,通过将fMRI与经典的OBA任务相结合来确定OBA的神经相关物.
主要方法:
- 使用功能磁共振成像 (fMRI) 测量早期视觉皮层 (V1,V2,V3) 中的血液氧水平依赖 (BOLD) 信号.
- 参与者执行了一项两矩形OBA任务,其中包括100%有效的提示和标准提示 (包括无效试验).
- 分析了与对象位置相对应的视网膜学定义的感兴趣区域 (ROI) 中的BOLD信号.
主要成果:
- 在V3 (实验1) 和V1-2 (实验2) 中观察到OBA的统计显著效应.
- 这些OBA效应存在于100%有效的提示运行和包含无效试验的运行中.
- 在100%有效的运行和无效试验的运行之间,OBA效应的大小没有差异.
结论:
- 基于对象的注意力 (OBA) 证明了强制性和自动的神经调制.
- 大胆的信号调制在未预示位置提供了OBA的神经相关的证据,独立于无效的预示效应.
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