"Scene" from inside: The representation of Observer's space in high-level visual cortex.
"Scene" from inside: The representation of Observer's space in high-level visual cortex.
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DOI：
10.1016/j.neuropsychologia.2021.108010
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发表时间：
2021-10-15
期刊：
影响因子：
2.6
通讯作者：
Park S
中科院分区：
文献类型：
--
作者：
Chaisilprungraung T;Park S
人类观察者非常善于感知周围的视觉刺激并与之互动。与物体或面孔等视觉刺激相比，场景的独特之处在于它们为观察者提供了封闭空间。观察者通过物理上处于场景内来观察场景。目前的研究通过研究场景空间边界的神经表征来探索这种独特的主体-场景关系。先前的研究假设场景的边界是在高级视觉皮层中处理的。值得注意的是，海马旁位置区（PPA）对具有封闭与开放空间边界的场景表现出神经敏感性。我们问这种敏感性是否反映了景观的开放性（例如，森林对海滩），或者直接围绕观察者的环境的开放性（即，场景是从室内还是室外观看）。在两个人类功能磁共振成像实验中，我们发现PPA以及另一个著名的导航处理区域枕叶位置区（OPA）根据观察者的空间而不是景观来处理场景的边界。此外，我们发现PPA的激活模式容易受到涉及场景的中级感知特性的操纵（例如，窗口框架的直线模式），而OPA的反应则不是。我们的研究结果具有重要的意义，在视觉场景处理的研究，并建议一个观察者的位置在代表的空间边界的重要作用，超出了低层次的视觉输入的景观。
Human observers are remarkably adept at perceiving and interacting with visual stimuli around them. Compared to visual stimuli like objects or faces, scenes are unique in that they provide enclosures for observers. An observer looks at a scene by being physically inside the scene. The current research explored this unique observer-scene relationship by studying the neural representation of scenes’ spatial boundaries. Previous studies hypothesized that scenes’ boundaries were processed in sets of high-level visual cortices. Notably, the parahippocampal place area (PPA), exhibited neural sensitivity to scenes that had closed vs. open spatial boundaries. We asked whether this sensitivity reflected the openness of landscape (e.g., forest vs. beach), or the openness of the environment immediately surrounding the observer (i.e., whether a scene was viewed from inside vs. outside a room). Across two human fMRI experiments, we found that the PPA, as well as another well-known navigation-processing area, the occipital place area (OPA), processed scenes’ boundaries according to the observer’s space rather than the landscape. Moreover, we found that the PPA’s activation pattern was susceptible to manipulations involving mid-level perceptual properties of scenes (e.g., rectilinear pattern of window frames), while the OPA’s response was not. Our results have important implications for research in visual scene processing and suggest an important role of an observer’s location in representing the spatial boundary, beyond the low-level visual input of a landscape.
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DOI：
10.1016/j.cub.2016.02.066
发表时间：
2016-04-25
期刊：
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影响因子：
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