Different roles of the parahippocampal place area (PPA) and retrosplenial cortex (RSC) in panoramic scene perception.
Different roles of the parahippocampal place area (PPA) and retrosplenial cortex (RSC) in panoramic scene perception.
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帕拉希帕克宫位置区域（PPA）和全景浮游生皮层（RSC）的不同角色在全景场景感知中。
DOI：
10.1016/j.neuroimage.2009.04.058
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发表时间：
2009-10-01
期刊：
影响因子：
5.7
通讯作者：
Chun, Marvin M.
中科院分区：
文献类型：
--
作者：
Park, Soojin;Chun, Marvin M.
关键词：
构建一个丰富而连续的视觉体验需要跨视图计算特定的细节，以及跨视图集成相似性。在本文中，我们报告功能磁共振成像（fMRI）的证据表明，这些不同的计算可能发生在两个场景敏感的区域在大脑中，海马旁的地方区（PPA）和压后皮质（RSC）。参与者从全景场景中看到不同的快照视图，这些视图代表明显不同的视图，但似乎来自同一场景。使用fMRI适应，我们测试了PPA和RSC是否将这些全景视图视为相同或不同。在全景条件下，从一个单一的全景场景的三个不同的意见。我们在PPA中没有发现全景重复序列的任何衰减，显示了视点特异性。相比之下，RSC在全景条件下显示出显著的衰减，显示出视点整合。然而，当全景视图不是以连续的方式呈现时，PPA中的特异性和RSC中的整合都丢失了。这些结果表明，PPA和RSC计算场景的不同属性：PPA侧重于选择性歧视不同的意见，而RSC侧重于在相同的视觉环境下的场景的整合。PPA和RSC的这些互补功能使跨多个视点的场景的具体和综合表示成为可能。
Constructing a rich and continuous visual experience requires computing specific details across views as well as integrating similarities across views. In this paper, we report functional magnetic resonance imaging (fMRI) evidence that these distinct computations may occur in two scene-sensitive regions in the brain, the parahippocampal place area (PPA) and retrosplenial cortex (RSC). Participants saw different snapshot views from panoramic scenes, which represented clearly different views, but appeared to come from the same scene. Using fMRI adaptation, we tested whether the PPA and RSC treated these panoramic views as the same or different. In the panoramic condition, three different views from a single panoramic scene were presented. We did not find any attenuation for panoramic repeats in the PPA, showing viewpoint-specificity. In contrast, RSC showed significant attenuation for the panoramic condition, showing viewpoint-integration. However, when the panoramic views were not presented in a continuous way, both the specificity in the PPA and the integration in RSC were lost. These results demonstrate that the PPA and RSC compute different properties of scenes: the PPA focuses on selective discrimination of different views while RSC focuses on the integration of scenes under the same visual context. These complementary functions of the PPA and RSC enable both specific and integrative representations of scenes across several viewpoints.
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