Cogn Neuropsychol. 2000 Feb 1;17(1):13-34. doi: 10.1080/026432900380463.
This study examined how cells in the temporal cortex code orientation and size of a complex object. The study focused on cells selectively responsive to the sight of the head and body but unresponsive to control stimuli. The majority of cells tested (19/26, 73%) were selectively responsive to a particular orientation in the picture plane of the static whole body stimulus, 7/26 cells showed generalisation responding to all orientations (three cells with orientation tuning superimposed on a generalised response). Of all cells sensitive to orientation, the majority (15/22, 68%) were tuned to the upright image. The majority of cells tested (81%, 13/16) were selective for stimulus size. The remaining cells (3/16) showed generalisation across four-fold decrease in size from life-sized. All size-sensitive cells were tuned to life-sized stimuli with decreasing responses to stimuli reduced from life-size. These results do not support previous suggestions that cells responsive to the head and body are selective to view but generalise across orientation and size. Here, extensive selectivity for size and orientation is reported. It is suggested that object orientation and size-specific responses might be pooled to obtain cell responses that generalise across size and orientation. The results suggest that experience affects neuronal coding of objects in that cells become tuned to views, orientation, and image sizes that are commonly experienced. Models of object recognition are discussed.
本研究考察了颞叶皮层中的细胞如何对复杂物体的方向和大小进行编码。研究集中在对头部和身体的视觉选择性反应而对控制刺激无反应的细胞上。在测试的大多数细胞中（19/26，73%），对静态整体刺激的图片平面中的特定方向具有选择性反应，7/26 个细胞表现出对所有方向的泛化反应（三个细胞的方向调谐叠加在泛化反应上）。在所有对方向敏感的细胞中，大多数（15/22，68%）对直立图像进行调谐。在测试的大多数细胞中（81%，13/16）对刺激大小具有选择性。其余细胞（3/16）对从真人大小缩小四倍的大小具有泛化作用。所有大小敏感的细胞都对真人大小的刺激进行调谐，对从真人大小缩小的刺激的反应减小。这些结果不支持先前的观点，即对头部和身体有反应的细胞是选择性的，而是对方向和大小进行泛化。在这里，报告了对大小和方向的广泛选择性。有人认为，对象的方向和大小特异性反应可能会被汇总，以获得对大小和方向进行泛化的细胞反应。结果表明，经验会影响对象的神经元编码，使细胞对常见的视图、方向和图像大小进行调谐。讨论了对象识别模型。
