人类大脑面部和场景网络中半球间连接的奇异模式
Bartholomew P A Quinn1, David M Watson1, Kira Noad1
1Department of Psychology, University of York, York, United Kingdom.
Imaging neuroscience (Cambridge, Mass.)
|August 13, 2025
概括
大脑成像显示,面部和场景处理的相反半球相应区域之间的连接性更高. 这种半球间偏差是个体特有的,这表明它可能解释知觉差异.
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:
- 面部处理涉及双边大脑网络,之前的研究强调了内半球连接,特别是在右半球.
- 在面部感知中,大脑相反半球 (半球间连接) 的同源区域之间的通信作用仍然不太清楚.
- 现有的神经模型往往忽视了半球间相互作用的贡献.
研究的目的:
- 通过使用fMRI,在两个大脑半球的同类面部选择性区域之间研究功能连接模式.
- 在面部和场景选择性网络中,比较半球间连接的强度与半球内连接.
- 为了确定观察到的半球间偏差是否在个体之间是一致的.
主要方法:
- 利用三个独立的fMRI数据集来分析自然观看任务期间的功能连接.
- 在同类和相邻的大脑区域中神经活动的时间过程之间的计算相关性.
- 半球间 (例如,右FFA-左FFA) 和半球内 (例如,右FFA-右OFA) 双之间的相比连接强度.
主要成果:
- 在面部选择性网络中,与内半球区域相比,在相应的半球间区域之间发现了显著更高的功能连接.
- 在场景选择性区域观察到类似的半球间偏差,但在早期视觉区域 (V1-V3) 没有.
- 证明这种半球间偏差是特异性的,因为在比较参与者的反应时,它显著减少.
结论:
- 人类大脑在更高层次的视觉网络中表现出更强的半球间连接倾向,例如面部和场景处理.
- 早期的视觉处理更多地依赖于半球内连接.
- 半球间连接的个体差异可能是感知能力的变化的基础.
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