在大脑中对象概念的表现
Spencer R Loggia1,2, Helen E Feibes1, Stuart Duffield1
1National Eye Institute, Bethesda, MD, 20814.
bioRxiv : the preprint server for biology
|December 22, 2025
概括
研究人员探索了子如何使用颜色和形状形成对象概念. 大脑成像显示,前下皮和极是代表这些概念特征的关键.
科学领域:
- 神经科学是一个神经科学.
- 认知科学 认知科学
- 灵长类动物研究研究
背景情况:
- 了解大脑如何从颜色和形状等基本特征中形成稳定的对象概念,是认知神经科学的重大挑战.
- 以前的研究还没有完全阐明神经机制,这些神经机制是感知特征融入抽象概念表征的基础.
研究的目的:
- 研究支持基于原始特征的物体概念的形成和表示的神经基质,如的颜色和形状.
- 确定涉及跨特征解码的大脑区域,以及概念表示如何与感知信息相互作用.
主要方法:
- 功能性磁共振成像 (fMRI) 用于训练来学习由颜色和形状定义的对象概念原始体.
- 采用全脑搜索灯分析来解码fMRI扫描期间记住的概念特征.
- 额外的成像实验检查了大脑对与颜色相关的形状和一致/不一致的颜色形状组合的反应.
主要成果:
- 对象概念的交叉特征解码在前下皮质 (aIT),极 (TP) 和额叶皮质 (FC) 中双边观察到,但在视网膜皮质中没有.
- 极 (TP) 和前下皮质 (aIT) 显示了响应模式,与概念形状的色彩空间几何学保持一致.
- 外层视觉皮层区分了与颜色相关的和非颜色相关的形状,表明其在感知特征结合中的作用.
结论:
- 前下皮质 (aIT) 和极 (TP) 在通过整合颜色和形状等特征来表示抽象物体概念方面发挥着至关重要的作用.
- 外层视觉皮层参与处理感知特征和它们的结合,为概念表征提供输入.
- 这些发现为概念形成提供了一个神经蓝图,并表明概念和感知大脑区域之间的反机制.
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