Bernstein Center for Computational Neuroscience Berlin, Charité-Universitätsmedizin Berlin, Berlin, Germany.
Neuroimage. 2011 Feb 1;54(3):2297-307. doi: 10.1016/j.neuroimage.2010.09.044. Epub 2010 Sep 30.
We are able to recognize objects independent of their location in the visual field. At the same time, we also keep track of the location of objects to orient ourselves and to interact with the environment. The lateral occipital complex (LOC) has been suggested as the prime cortical region for representation of object identity. However, the extent to which LOC also represents object location has remained debated. In this study we used high-resolution fMRI in combination with multivoxel pattern classification to investigate the cortical encoding of three object exemplars from four different categories presented in two different locations. This approach allowed us to study location-tolerant object information and object-tolerant location information in LOC, both at the level of categories and exemplars. We found evidence for both location-tolerant object information and object-tolerant location information in LOC at the level of categories and exemplars. Our results further highlight the mixing of identity and location information in the ventral visual pathway.
我们能够独立于视野中的位置识别物体。同时，我们也会跟踪物体的位置以便定位自己并与环境进行交互。外侧枕叶复合体（LOC）被认为是代表物体身份的主要皮质区域。然而，LOC 代表物体位置的程度一直存在争议。在这项研究中，我们使用高分辨率 fMRI 结合多体素模式分类来研究在两个不同位置呈现的四个不同类别中的三个物体样本的皮质编码。这种方法使我们能够在 LOC 中研究位置容忍的物体信息和物体容忍的位置信息，包括类别和样本两个水平。我们在 LOC 中发现了类别和样本水平上的位置容忍物体信息和物体容忍位置信息的证据。我们的结果进一步强调了身份和位置信息在腹侧视觉通路上的混合。
