精确的注意力控制人口的吸引力
Sumiya Sheikh Abdirashid1,2,3,4, Tomas Knapen1,2,3,5, Serge O Dumoulin1,2,3,6,7
1Spinoza Centre for Neuroimaging, Amsterdam, the Netherlands.
Journal of vision
|September 3, 2025
概括
注意精确的形状视觉空间采样. 集中注意力强烈地吸引受体场到所关注的位置,与分散注意力不同,揭示了注意力如何影响视觉处理.
科学领域:
- 神经科学
- 认知科学
- 视觉感知
背景情况:
- 视觉注意力调节神经活动和受觉场的特性.
- 注意力精度和空间重新采样之间的准确关系仍然不完全理解.
研究的目的:
- 调查注意力精度如何影响人口受体场 (pRF) 的空间特性.
- 要确定视觉空间重新抽样的程度是否受其空间分布的影响.
主要方法:
- 使用7T功能磁共振成像 (fMRI) 来测量pRF特性.
- 通过让参与者以集中 (0.1°半径) 或分散 (>5°半径) 的注意力执行任务来操纵注意力精度.
- 分析血液氧化水平依赖 (BOLD) 响应幅度和皮层空间调整.
主要成果:
- 随着任务需求的增加,BOLD响应幅度增加,显示聚焦注意力的foveal pRF增加和分布式注意力的更广泛增加.
- 与分散注意力相比,聚焦注意力对被关注的位置具有更强的吸引力.
- 吸引 pRF 的程度取决于 pRF 和注意力场之间的重叠,由高斯注意力场模型解释.
结论:
- 注意的空间分布和精度显著决定了视觉空间重新采样的程度.
- 在视觉皮层中调节神经表现的空间调节.
- 这些发现提升了我们对注意力在塑造视觉感知和神经处理中的作用的理解.
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