Two hierarchically organized neural systems for object information in human visual cortex
Two hierarchically organized neural systems for object information in human visual cortex
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DOI：
10.1038/nn2036
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发表时间：
2008-02-01
影响因子：
25
通讯作者：
Kastner, Sabine
中科院分区：
文献类型：
--
作者：
Konen, Christina S.;Kastner, Sabine
灵长类动物的视觉系统大致分为两个独立的处理途径，腹侧流的物体视觉和背侧流的空间视觉。这里，来自人类脑功能成像的证据表明，物体表征并不局限于腹侧通路，也可以在背侧通路的沿着几个区域找到。在这两个流中，在中间处理阶段在纹外皮层（V4，V3A，MT和V7）的地区表现出对象的选择性，但观点和大小特异性的反应。与此相反，高阶领域的枕叶外侧和后顶叶皮层（IPS1和IPS2）选择性地响应对象独立的图像变换。相反的两个途径的假设，我们的研究结果表明，基本的对象信息的形状，大小和观点可能表示类似的两个平行的和分层组织的神经系统中的腹侧和背侧视觉通路。
The primate visual system is broadly organized into two segregated processing pathways, a ventral stream for object vision and a dorsal stream for space vision. Here, evidence from functional brain imaging in humans demonstrates that object representations are not confined to the ventral pathway, but can also be found in several areas along the dorsal pathway. In both streams, areas at intermediate processing stages in extrastriate cortex (V4, V3A, MT and V7) showed object-selective but viewpoint- and size-specific responses. In contrast, higher-order areas in lateral occipital and posterior parietal cortex (LOC, IPS1 and IPS2) responded selectively to objects independent of image transformations. Contrary to the two-pathways hypothesis, our findings indicate that basic object information related to shape, size and viewpoint may be represented similarly in two parallel and hierarchically organized neural systems in the ventral and dorsal visual pathways.