NEURONAL SELECTIVITIES TO COMPLEX OBJECT FEATURES IN THE VENTRAL VISUAL PATHWAY OF THE MACAQUE CEREBRAL-CORTEX
NEURONAL SELECTIVITIES TO COMPLEX OBJECT FEATURES IN THE VENTRAL VISUAL PATHWAY OF THE MACAQUE CEREBRAL-CORTEX
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DOI：
10.1152/jn.1994.71.3.856
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发表时间：
1994-03-01
影响因子：
2.5
通讯作者：
TANAKA, K
中科院分区：
文献类型：
--
作者：
KOBATAKE, E;TANAKA, K
1.为了推断皮层区域在腹侧视觉通路不同阶段的相对作用，我们采用麻醉猕猴，定量检测了V2、V4、颞下皮层后部（后部IT）和颞下皮层前部（前部IT）细胞的视觉反应.首先通过使用还原方法确定每个记录的细胞的激活的关键特征。我们从三维复杂物体的图像开始，通过消除图像中存在的一部分特征，逐步简化有效刺激的图像。最大限度地激活细胞的最简单的特征被确定为关键特征。然后将对关键特征的反应与同一细胞对32个简单刺激的常规反应进行比较，这些刺激包括四种不同方向的白色和黑色条以及四种不同颜色的正方形或斑点。在后IT和V4以及前IT中发现了对特定复杂物体特征反应最大的细胞。然而，后IT和V4中的细胞与前IT中的细胞不同，因为它们中的许多细胞在某种程度上对一些简单特征有反应，感受野的大小很小，而且它们与对某些简单特征反应最大的细胞混合在一起。后IT和V4的复杂临界特征各不相同;它们包括复杂的形状、形状和纹理的组合以及形状和颜色的组合。我们认为，在V4和后IT的本地神经网络中发挥了重要作用，在复杂的对象功能的选择性反应的形成。
1. To infer relative roles of cortical areas at different stages of the ventral visual pathway, we quantitatively examined visual responses of cells in V2, V4, the posterior part of the inferotemporal cortex (posterior IT), and the anterior part of the inferotemporal cortex (anterior IT), using anesthetized macaque monkeys.2. The critical feature for the activation was first determined for each recorded cell by using a reduction method. We started from images of three-dimensional complex objects and simplified the image of effective stimuli step by step by eliminating a part of the features present in the image. The simplest feature that maximally activated the cell was determined as the critical feature. The response to the critical feature was then compared with responses of the same cell to a routine set of 32 simple stimuli, which included white and black bars of four different orientations and squares or spots of four different colors.3. Cells that responded maximally to particular complex object features were found in posterior IT and V4 as well as in anterior IT. The cells in posterior IT and V4 were, however, different from the cells in anterior IT in that many of them responded to some extent to some simple features, that the size of the receptive field was small, and that they intermingled in single penetrations with cells that responded maximally to some simple features. The complex critical features in posterior IT and V4 varied; they consisted of complex shapes, combinations of a shape and texture, and combinations of a shape and color.4. We suggest that local neuronal networks in V4 and posterior IT play an essential role in the formation of selective responses to complex object features.