对3D面部结构的双眼线索增加了深度选择视觉皮层的激活,而面部选择性区域的效果可以忽略不计
Eva Deligiannis1,2,3, Marisa Donnelly2,4, Carol Coricelli2,5,6
1Neuroscience Program, Western University, London, ON, Canada.
Journal of vision
|September 10, 2025
概括
平面图像足以研究关键大脑区域的面部识别. 然而,三维 (3D) 面部处理涉及深度选择性区域,这表明3D结构信息在视觉感知中发挥着作用.
科学领域:
- 神经科学是一个神经科学.
- 认知心理学 认知心理学
- 视觉感知 视觉感知 视觉感知
背景情况:
- 由于实验方便,视觉面部处理研究通常使用2D图像.
- 然而,2D图像缺乏现实世界双筒视图中存在的3D结构信息.
- 自然双眼深度线索在面部感知过程中对大脑活动的贡献仍然不清楚.
研究的目的:
- 为了研究双筒深度信息如何影响深度和面部选择性区域的大脑激活.
- 用功能磁共振成像 (fMRI) 来比较神经对2D和3D面部的反应.
- 为了确定二维图像是否适合研究大脑中的面部识别.
主要方法:
- 使用fMRI测量观看面部立体图像的参与者的大脑活动.
- 呈现的刺激具有精确的双眼差异 (3D),零差异 (2D),反向差异 (伪镜3D) 和单眼2D条件.
- 采用自然观看几何学来模拟现实世界的面部观看条件.
主要成果:
- 与2D面孔相比,3D面孔 (精确和伪镜面) 的深度选择性尾尾区域 (例如V3A,hMT+) 显示出更高的激活和独特的模式.
- 面部选择性角部区域 (例如,OFA,FFA,pSTS) 对内部面部差异的敏感性有限.
- 在核心面部处理领域,2D面部引起的激活模式与3D面部类似.
结论:
- 2D图像可以作为合理的代理来研究面部选择性大脑区域中面部识别的神经基础.
- 自然主义的双筒深度信息显著影响深度选择性背流区域的激活.
- 需要进一步研究,以了解3D结构处理在面部视觉流中对面部知觉的作用.
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