Journal
SCIENCE
Volume 352, Issue 6292, Pages 1464-1468Publisher
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.aaf0941
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Funding
- Wellcome Trust [099715/Z/12/Z, WT104765MA]
- Medical Research Council [MR/L019639/1]
- James S. McDonnell Foundation [JSMF220020372]
- MRC [MR/L019639/1] Funding Source: UKRI
- Medical Research Council [MR/L019639/1] Funding Source: researchfish
- Wellcome Trust [099715/Z/12/Z] Funding Source: Wellcome Trust
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It has been hypothesized that the brain organizes concepts into a mental map, allowing conceptual relationships to be navigated in a manner similar to that of 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 set of brain regions markedly similar to those activated during spatial navigation. This gridlike signal is consistent across sessions acquired within an hour and more than a week apart. Our findings su::est that global relational codes may be used to organize nonspatial conceptual representations and that these codes may have a hexagonal gridlike pattern when conceptual knowledge is laid out in two continuous dimensions.
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