Yamazaki Yumiko, Hashimoto Teruo, Iriki Atsushi
Laboratory for Symbolic Cognitive Development, RIKEN Brain Science Institute, 2-1 Hirosawa, Wako-shi, Saitama 351-0198, Japan.
F1000 Biol Rep. 2009 Sep 28;1:74. doi: 10.3410/B1-74.
The primate posterior parietal cortex (PPC) processes information related to environmental physical space. The human PPC has apparently expanded not only in size but also in its functional range to encompass certain abstract and higher-order conceptual spaces. In this report, we review various forms of non-spatial representation in the PPC. These forms are presented roughly in order of the level of abstraction of the 'objects' and pseudo-spatial relations represented. Also, we consider mechanisms that could have enabled the hominid PPC to establish such representations. Lastly, we offer a general principle to unify the newer forms of representation with the original functions of the PPC.
灵长类动物的顶叶后皮质（PPC）处理与环境物理空间相关的信息。人类的PPC显然不仅在大小上有所扩展，而且在其功能范围上也有所扩展，以涵盖某些抽象和高阶概念空间。在本报告中，我们回顾了PPC中各种非空间表征形式。这些形式大致按照所表征的“对象”和伪空间关系的抽象程度顺序呈现。此外，我们考虑了可能使原始人类PPC能够建立此类表征的机制。最后，我们提出了一个通用原则，以将较新的表征形式与PPC的原始功能统一起来。
