Organizing conceptual knowledge in humans with a gridlike code

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 symme...

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Published in:Science (American Association for the Advancement of Science) Vol. 352; no. 6292; pp. 1464 - 1468
Main Authors: Constantinescu, Alexandra O, O'Reilly, Jill X, Behrens, Timothy E J
Format: Journal Article
Language:English
Published: United States 17.06.2016
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ISSN:1095-9203
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Abstract 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 suggest 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.
AbstractList 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 suggest 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.
Author Behrens, Timothy E J
Constantinescu, Alexandra O
O'Reilly, Jill X
Author_xml – sequence: 1
  givenname: Alexandra O
  surname: Constantinescu
  fullname: Constantinescu, Alexandra O
  organization: Oxford Centre for Functional MRI of the Brain, University of Oxford, John Radcliffe Hospital, Headington, Oxford, OX3 9DU, UK
– sequence: 2
  givenname: Jill X
  surname: O'Reilly
  fullname: O'Reilly, Jill X
  organization: Donders Institute, Radboud University, Nijmegen, The Netherlands
– sequence: 3
  givenname: Timothy E J
  surname: Behrens
  fullname: Behrens, Timothy E J
  organization: Donders Institute, Radboud University, Nijmegen, The Netherlands
BackLink https://www.ncbi.nlm.nih.gov/pubmed/27313047$$D View this record in MEDLINE/PubMed
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Snippet 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...
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SubjectTerms Adult
Brain - cytology
Brain - physiology
Female
Functional Neuroimaging
Habits
Humans
Knowledge
Magnetic Resonance Imaging
Male
Neurons - physiology
Spatial Navigation - physiology
Young Adult
Title Organizing conceptual knowledge in humans with a gridlike code
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