视觉数量和时间的皮层数量表示越来越多地重叠在上层皮层中,但仍然是不同的
Evi Hendrikx1, Jacob M Paul2, Martijn van Ackooij1
1Experimental Psychology, Helmholtz Institute, Utrecht University, Heidelberglaan 1, Utrecht 3584 CS, the Netherlands.
NeuroImage
|January 12, 2024
概括
数字 (数量) 和时间 (定时) 的神经表示最初在大脑中分别发展. 这些表征逐渐集成到更高的大脑区域,促进行为互动,而不是形成一个单一的,统一的大小系统.
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.
- 计算神经科学是一种神经科学.
背景情况:
- 感官大脑区域通常会呈现出地形图,神经反应偏好在皮层中逐渐变化.
- 之前的研究使用7-特斯拉fMRI和神经建模识别了协会皮层中的数量和时间的地形图.
- 行为研究揭示了数字和时间量估计之间的相似性和相互作用,表明共享的神经支.
研究的目的:
- 研究大脑中常见数量表示的等级出现.
- 为了确定数量和时间地图是否越来越多地与重叠,响应偏好和地形有关.
- 了解不同数量表示是如何集成的,以及这种集成是否形成一个概括的大小系统.
主要方法:
- 利用7特斯拉功能磁共振成像 (fMRI) 来绘制与数量和时间相关的大脑活动.
- 采用基于神经模型的分析来检查数量表示的地形组织.
- 在不同皮层层面上比较了数字和时间地图之间的重叠,响应偏好和地形角度.
主要成果:
- 早期数量和时间的数量图没有重叠,表明分开的初始处理.
- 更高级 (更高) 的皮质地图显示,数量和时间表示之间的重叠越来越多.
- 虽然重叠增加了,但响应偏好和数量和时间地图之间的固定地形角度之间的一致相关性并没有在层次上增加.
结论:
- 对不同数量 (数量和时间) 的神经反应最初被单独处理,并逐渐集成到更高阶的大脑区域.
- 这种整合发生在没有开发一个统一的,通用代表的普遍的大小.
- 不同数量表示的渐进整合可能是观察到的行为互动的基础,并允许共享访问诸如行动计划等认知功能.
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