A neural code for three-dimensional object shape in macaque inferotemporal cortex.

A neural code for three-dimensional object shape in macaque inferotemporal cortex.
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DOI:
10.1038/nn.2202
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发表时间:
2008-11
影响因子:
25
通讯作者:
Connor, Charles E.
Connor, Charles E.
中科院分区:
医学1区
文献类型:
--
作者:
Yamane, Yukako;Carlson, Eric T.;Bowman, Katherine C.;Wang, Zhihong;Connor, Charles E.

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以前对复杂物体形状的神经编码的研究主要集中在二维(2D)图案表示上。这可能是物体视觉的主要模式,基于简单性和与视网膜图像的直接关系。相反,3D形状表示需要基于大量计算的高维编码。在这里,我们第一次为复杂的3D物体形状提供了显式神经编码的证据。我们使用一种新的进化刺激策略和线性/非线性反应模型来表征猕猴下颞叶皮质(IT)的3D形状反应。我们发现了表面碎片的3D空间构型的广泛调谐,这些空间构型以其3D取向和关节主曲率为特征。3D形状的结构表示可以提供对象结构的特定知识,该特定知识对于指导复杂的物理交互以及评估对象的功能和实用性至关重要。
Previous investigations of the neural code for complex object shape have focused on two-dimensional (2D) pattern representation. This might be the primary mode for object vision, based on simplicity and direct relation to the retinal image. In contrast, 3D shape representation requires higher-dimensional coding based on extensive computation. Here, for the first time, we provide evidence of an explicit neural code for complex 3D object shape. We used a novel evolutionary stimulus strategy and linear/nonlinear response models to characterize 3D shape responses in macaque monkey inferotemporal cortex (IT). We found widespread tuning for 3D spatial configurations of surface fragments characterized by their 3D orientations and joint principal curvatures. Configural representation of 3D shape could provide specific knowledge of object structure critical for guidance of complex physical interactions and evaluation of object functionality and utility.
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