Tracking the Emergence of Location-based Spatial Representations in Human Scene-Selective Cortex.
Tracking the Emergence of Location-based Spatial Representations in Human Scene-Selective Cortex.
复制标题
追踪人类场景选择皮层中基于位置的空间表征的出现。
DOI：
10.1162/jocn_a_01654
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发表时间：
2021-03
影响因子：
3.2
通讯作者：
Horner AJ
中科院分区：
文献类型：
--
作者：
Berens SC;Joensen BH;Horner AJ
人类大脑的场景选择区域形成了我们环境中位置的非中心表示。这些表示独立于航向方向，并允许我们知道我们在哪里，而不管我们的旅行方向。然而，我们对这些基于位置的表征是如何形成的知之甚少。使用fMRI表征相似性分析和线性混合模型，我们跟踪了场景选择性脑区中基于位置的表征的出现。我们估计了两个不同场景的活动模式，在参与者得知他们来自同一地点之前和之后拍摄。在学习阶段，我们向参与者展示了两种类型的全景视频：（1）重叠视频条件，显示来自同一位置的两个不同场景（0°和180°）;（2）非重叠视频，显示来自不同位置的两个不同场景（作为控制条件）。在海马旁皮层（PHC）和压后皮层（RSC），从相同的位置的场景表示变得更加相似，只有在他们已经显示在重叠条件，这表明出现的视点无关的位置为基础的表示。而这些代表出现在PHC的任务表现无关，RSC代表只出现在参与者可以行为识别的两个场景属于同一个位置的位置。结果表明，我们可以跟踪的出现，基于位置的表征在PHC和RSC在一个单一的功能磁共振成像实验。此外，他们支持计算模型，提出RSC在将视点独立表示转换为特定视点的行为相关表示方面发挥着关键作用。
Scene-selective regions of the human brain form allocentric representations of locations in our environment. These representations are independent of heading direction and allow us to know where we are regardless of our direction of travel. However, we know little about how these location-based representations are formed. Using fMRI representational similarity analysis and linear mixed models, we tracked the emergence of location-based representations in scene-selective brain regions. We estimated patterns of activity for two distinct scenes, taken before and after participants learnt they were from the same location. During a learning phase, we presented participants with two types of panoramic videos: (1) an overlap video condition displaying two distinct scenes (0° and 180°) from the same location and (2) a no-overlap video displaying two distinct scenes from different locations (which served as a control condition). In the parahippocampal cortex (PHC) and retrosplenial cortex (RSC), representations of scenes from the same location became more similar to each other only after they had been shown in the overlap condition, suggesting the emergence of viewpoint-independent location-based representations. Whereas these representations emerged in the PHC regardless of task performance, RSC representations only emerged for locations where participants could behaviorally identify the two scenes as belonging to the same location. The results suggest that we can track the emergence of location-based representations in the PHC and RSC in a single fMRI experiment. Further, they support computational models that propose the RSC plays a key role in transforming viewpoint-independent representations into behaviorally relevant representations of specific viewpoints.
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一个独立的，具有里程碑意义的头向信号，在肾上腺后皮层中。
影响因子：
25
作者：
Jacob PY;Casali G;Spieser L;Page H;Overington D;Jeffery K
通讯作者：
Jeffery K
枕叶区域在导航过程中代表环境边界有因果关系。
DOI：
10.1016/j.cub.2016.02.066
发表时间：
2016-04-25
期刊：
Current biology : CB
影响因子：
--
作者：
Julian JB;Ryan J;Hamilton RH;Epstein RA
通讯作者：
Epstein RA
DOI：
10.1093/cercor/bhn161
发表时间：
2009-05
期刊：
Cerebral cortex (New York, N.Y. : 1991)
影响因子：
--
作者：
den Ouden HE;Friston KJ;Daw ND;McIntosh AR;Stephan KE
通讯作者：
Stephan KE
影响因子：
3.2
作者：
Clarke, Alex;Pell, Philip J.;Tyler, Lorraine K.
通讯作者：
Tyler, Lorraine K.
影响因子：
2.7
作者：
Calton, Jeffrey L.;Taube, Jeffrey S.
通讯作者：
Taube, Jeffrey S.