操纵注意力优先级在人类视觉皮层的记忆和感官表现之间产生了权衡.
Rosanne L Rademaker1,2, John T Serences2,3
1Ernst Strüngmann Institute for Neuroscience in cooperation with the Max Planck Society, Frankfurt, Germany.
bioRxiv : the preprint server for biology
|September 30, 2024
概括
在记忆任务中优先考虑外部感官输入,会降低大脑的记忆准确性. 关注分心因素会牺牲记忆的真实性,突出了感官处理中的权衡.
科学领域:
- 认知神经科学 认知神经科学
- 神经成像是一种神经成像.
- 视觉感知 视觉感知 视觉感知
背景情况:
- 大脑可以同时处理记住的信息和当前的感官输入.
- 视觉皮层的早期感官区域参与了记忆和感官数据的表现.
研究的目的:
- 调查早期视觉皮层同时表示的极限.
- 为了检查注意分心器如何影响工作记忆的忠实性.
主要方法:
- 功能磁共振成像 (fMRI) 用于扫描人类受试者.
- 参与者执行了一个工作记忆任务,涉及记住格子方向.
- 用不同的线索 (忽略,检测对比度变化,检测方向变化) 将注意力操纵到感官分心器上.
主要成果:
- 在早期视觉皮层中的记忆表现忠实性在被忽视分心因素时是最高的.
- 随着注意力转移到分散注意力的对比或方向,记忆忠实度下降.
- 干扰器的表示忠实度显示了反向关系,随着对干扰器的关注而增加.
结论:
- 在早期的感官表现中存在一个权衡,当注意力同时指向外部刺激和内部记忆时.
- 上下反机制可能会重新分配神经资源,影响记忆性能.
- 外部事件的分散注意力可能会导致由于这些表示性权衡而导致记忆失效.
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