Large-scale dissociations between views of objects, scenes, and reachable-scale environments in visual cortex
Large-scale dissociations between views of objects, scenes, and reachable-scale environments in visual cortex
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DOI：
10.1073/pnas.1912333117
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发表时间：
2020-11-24
影响因子：
11.1
通讯作者：
Konkle, Talia
中科院分区：
文献类型：
--
作者：
Josephs, Emilie L.;Konkle, Talia
空间相关的处理过程需要一个大脑区域网络，这个网络与物体处理过程中需要的区域是分开的。这种分离在很大程度上是通过对比可导航尺度空间的视图和特写的孤立对象的视图来探索的。然而，在自然主义的视觉体验中，我们遇到了介于这些极端之间的空间，比如桌子和厨房柜台的顶部，这些空间是不可导航的，但通常包含多个对象。这种可达尺度的观点是如何在大脑中呈现的？在三个人类功能性神经影像学实验中，我们发现了可达尺度视图与可导航场景视图和近距离对象视图大规模分离的证据。三个大脑区域被确定为系统性的反应偏好，可达到的意见，位于后侧沟，下顶叶沟，和上级顶叶小叶。随后的分析表明，这三个区域可能对多个物体的存在特别敏感。此外，在所有经典的场景和对象区域，可达尺度的意见解离的对象和场景的中间响应幅度。两者合计，这些结果建立，可达尺度的环境有一个独特的代表性的签名，从场景和对象的意见，在视觉皮层。
Space-related processing recruits a network of brain regions separate from those recruited in object processing. This dissociation has largely been explored by contrasting views of navigable-scale spaces to views of close-up, isolated objects. However, in naturalistic visual experience, we encounter spaces intermediate to these extremes, like the tops of desks and kitchen counters, which are not navigable but typically contain multiple objects. How are such reachable-scale views represented in the brain? In three human functional neuroimaging experiments, we find evidence for a large-scale dissociation of reachable-scale views from both navigable scene views and close-up object views. Three brain regions were identified that showed a systematic response preference to reachable views, located in the posterior collateral sulcus, the inferior parietal sulcus, and superior parietal lobule. Subsequent analyses suggest that these three regions may be especially sensitive to the presence of multiple objects. Further, in all classic scene and object regions, reachable-scale views dissociated from both objects and scenes with an intermediate response magnitude. Taken together, these results establish that reachable-scale environments have a distinct representational signature from both scene and object views in visual cortex.