Precedence of the Eye Region in Neural Processing of Faces
Precedence of the Eye Region in Neural Processing of Faces
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DOI：
10.1523/jneurosci.2391-12.2012
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发表时间：
2012-11-21
影响因子：
5.3
通讯作者：
DiCarlo, James J.
中科院分区：
文献类型：
--
作者：
Issa, Elias B.;DiCarlo, James J.
功能性磁共振成像（fMRI）揭示了猴子下颞叶皮层（IT）中的多个子区域，这些子区域对面部图像的选择性超过其他物体。最早的这些子区域，后外侧面补丁（PL），尚未研究以前在神经生理水平。也许并不奇怪，我们发现，PL包含高浓度的“面部选择性”细胞时，测试与标准的图像集相比，以前使用的功能磁共振成像水平定义的区域。然而，我们在这里报告说，几个不同的图像集和分析方法的收敛表明，几乎所有的面选择性PL细胞是由一个单一的眼睛在一个人脸轮廓的背景下存在的驱动。最引人注目的是，只包含一只眼睛的图像，即使在轮廓中的位置不正确，也几乎可以像全脸图像一样驱动神经元，而仅仅缺乏这一特征的面部图像会导致更长的延迟反应。因此，自下而上的人脸处理是相对本地和线性集成的功能-与基于零件的模型-接地调查如何在IT人脸处理层次结构中首先推断出人脸的存在是一致的。
Functional magnetic resonance imaging (fMRI) has revealed multiple subregions in monkey inferior temporal cortex (IT) that are selective for images of faces over other objects. The earliest of these subregions, the posterior lateral face patch (PL), has not been studied previously at the neurophysiological level. Perhaps not surprisingly, we found that PL contains a high concentration of "face-selective" cells when tested with standard image sets comparable to those used previously to define the region at the level of fMRI. However, we here report that several different image sets and analytical approaches converge to show that nearly all face-selective PL cells are driven by the presence of a single eye in the context of a face outline. Most strikingly, images containing only an eye, even when incorrectly positioned in an outline, drove neurons nearly as well as full-face images, and face images lacking only this feature led to longer latency responses. Thus, bottom-up face processing is relatively local and linearly integrates features-consistent with parts-based models-grounding investigation of how the presence of a face is first inferred in the IT face processing hierarchy.