空间注意力在预测目标期间选择性地改变视觉皮层表示
Ekin Tünçok1, Marisa Carrasco2,3, Jonathan Winawer2,3
1Department of Psychology, New York University, New York, NY, USA. tuncokekin@gmail.com.
Nature communications
|October 1, 2025
概括
空间注意力在刺激出现之前增强视觉皮层的反应,提高了在受访地点的表现. 这种选择性处理涉及神经转移和权衡,影响我们与环境的互动方式.
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
- 视觉感知 视觉感知 视觉感知
背景情况:
- 通过优先考虑刺激,注意力对于有效的环境相互作用至关重要.
- 隐藏的空间注意力影响视觉处理和行为结果.
- 了解视觉皮层的注意力调节是认知功能的关键.
研究的目的:
- 研究隐藏的空间注意力如何调节人类视觉皮层在目标发作之前的反应.
- 为了确定空间注意力对后续行为表现的影响.
- 探索预期注意的基础的神经机制.
主要方法:
- 同时的心理物理和功能磁共振成像 (fMRI) 实验.
- 在不同的注意力条件下测量行为表现 (准确性,反应时间).
- 对视觉皮层中目标前血氧水平依赖 (BOLD) 反应的分析.
主要成果:
- 行为表现在有线索的位置上有所改善,在没有线索的位置上有所恶化,这表明有选择性处理的权衡.
- 目标前的BOLD反应显示了刺激独立的基线变化:在指定的位置附近增加,在其他地方减少.
- 人口的感受性场中心转移到受访地点,效果在更高的视觉区域放大.
结论:
- 空间注意力在目标出现之前显著调节视觉皮层活动.
- 注意力机制涉及神经反应特性和基线活动的预测性变化.
- 这些神经变化通过预测性处理和选择性优先级来提高性能.
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