在人类腹部角-角皮层的类别学习背后的机制
Xiangqi Luo1, Mingyang Li2, Jiahong Zeng1
1State Key Laboratory of Cognitive Neuroscience and Learning & IDG/McGovern Institute for Brain Research, Beijing Normal University, Beijing 100875, PR China.
NeuroImage
|January 19, 2024
概括
这项研究表明,大脑是如何工作的.
科学领域:
- 神经科学是一个神经科学.
- 认知神经科学 认知神经科学
- 神经成像是一种神经成像.
背景情况:
- 人体腹部角-角皮层 (VOTC) 包含专门的区域来处理诸如单词,工具和动物等类别.
- 在VOTC中的类别形成受视觉输入和非视觉体验的影响.
- 非视觉体验塑造VOTC类别选择性的确切机制尚不清楚.
研究的目的:
- 研究如何上下非视觉体验调节人类VOTC中的特定类别处理.
- 确定培训是否可以在VOTC中引发新的类别偏好.
- 在VOTC中探索编码不同非视觉分类信息的神经基础.
主要方法:
- 参与者接受了大约13个小时的培训,以将新的无意义数字与明显的非视觉特征联系起来 (字样,非字样或视觉熟悉).
- 功能磁共振成像 (fMRI) 用于在刺激呈现期间测量训练前和训练后的大脑活动.
- 分析重点是VOTC激活模式和类别选择性的变化.
主要成果:
- 培训成功地诱导了对VOTC内受过培训的类别的分类偏好.
- 与两种训练类别相关的大脑区域显示出显著的重叠.
- 在这个重叠的区域内,每个培训类别都有不同的激活模式和强度.
结论:
- 上下非视觉体验可以塑造人类VOTC中特定类别的表征.
- VOTC在形成和区分基于非视觉线索的类别表示方面表现出了可塑性.
- 这些发现提供了关于在视觉类别处理中整合非视觉信息的基础的神经机制的见解.
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