Organizing conceptual knowledge in humans with a gridlike code.
Organizing conceptual knowledge in humans with a gridlike code.
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用网格代码在人类中组织概念知识。
DOI：
10.1126/science.aaf0941
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发表时间：
2016-06-17
期刊：
影响因子：
--
通讯作者：
Behrens TEJ
中科院分区：
文献类型：
--
作者：
Constantinescu AO;O'Reilly JX;Behrens TEJ
有人假设，大脑将概念组织成一个心理地图，允许概念关系以类似于空间的方式导航。网格单元使用六边形对称代码来组织空间表示，并且是功能磁共振成像信号中精确六边形对称的可能来源。人类在导航二维概念知识时，在一组与空间导航时激活的大脑区域惊人相似的大脑区域中显示出相同的六边形信号。这种网格状信号在一小时内和一周以上的时间间隔内获得的会话中是一致的。我们的研究结果表明，全球关系代码可能被用来组织非空间概念表征，这些代码可能有六边形网格状模式时，概念知识是在两个连续的维度。
It has been hypothesized that the brain organizes concepts into a mental map, allowing conceptual relationships to be navigated in a similar fashion to space. Grid cells use a hexagonally-symmetric code to organize spatial representations and are the likely source of a precise hexagonal symmetry in the functional magnetic resonance imaging signal. Humans navigating conceptual two-dimensional knowledge showed the same hexagonal signal in a strikingly similar set of brain regions to those activated during spatial navigation. This grid-like signal is consistent across sessions acquired within an hour and more than a week apart. Our findings suggest that global relational codes may be used to organize non-spatial conceptual representations and that these codes may have hexagonal grid-like pattern when conceptual knowledge is laid out in two continuous dimensions.