视觉工作记忆是感知的抽象
Ziyi Duan1, Clayton E Curtis1,2
1Department of Psychology, New York University, New York, NY 10003, USA.
bioRxiv : the preprint server for biology
|December 11, 2023
概括
视觉工作记忆 (WM) 的表示是抽象的,而不是直接的感官副本. 这项研究表明,WM代码对感知偏见不敏感,这表明记忆是抽象的,而不仅仅是维持的感官输入.
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:
- 开创性的研究表明,视觉工作记忆 (WM) 内容可以从早期视觉皮层活动中解码,影响WM存储理论.
- 感官招募假设表明,WM依赖于与感知相同的神经机械,但解码的WM表示的性质仍然不清楚.
- 网格定向的感知解码涉及到超出简单定向调节神经元的复杂相互作用,包括光圈偏差.
研究的目的:
- 调查感知光圈偏差如何影响视觉工作记忆解码.
- 通过操纵刺激特性来测试WM代码的感觉相似性.
- 要确定WM表示是直接的感官维护还是抽象的表示.
主要方法:
- 使用功能磁共振成像 (fMRI) 来分析在WM任务期间的大脑活动.
- 操纵视觉刺激 (网格) 使用直角辐射和角度调制器来创建感知孔径偏差.
- 采用交叉分类分析和人口受感场建模来可视化和比较WM表示.
主要成果:
- 维持格子方向的fMRI模式可以在不同的调制器之间互换,这表明对光圈偏差不敏感.
- 视觉和皮皮层中显著的交叉分类表明WM表示是抽象的,与特定的感知特征无关.
- 种群受感场模型显示,调制格子的WM表示被重新编码为单一的定向线,不管孔径偏差.
结论:
- 视觉WM表示是感知的抽象,而不是直接的感官维护.
- WM代码对感知孔径偏差是免疫的,挑战了简单感官招募的理论.
- 这些发现需要对视觉工作记忆存储和表示理论进行修订.
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