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Author Notes:

Correspondence: nicole.eichert@psy.ox.ac.uk

Disclosures: No competing interests declared.

Subjects:

Research Funding:

Wellcome 203730/Z/16/Z to Nicole Eichert. Wellcome 203139/Z/16/Z to Rogier B Mars. National Institute for Health Research Oxford Biomedical Research Centre to Rogier B Mars, Mark Jenkinson. Biotechnology and Biological Sciences Research Council BB/N019814/1 to Rogier B Mars. Dutch National Science Foundation 452-13-015 to Rogier B Mars. Academy of Medical Sciences to Emma C Robinson. British Heart Foundation to Emma C Robinson.

UK Government Department of Business, Energy and Industrial Strategy to Emma C Robinson. Wellcome SBF003\1116 to Emma C Robinson. European Commission Marie Sklodowska-Curie Fellowship: 750026 to Katherine L Bryant. Medical Research Council MR/L009013/1 to Saad Jbabdi. National Institute for Health Research to Mark Jenkinson. Biotechnology and Biological Sciences Research Council BB/H016902/1 to Kristine Krug. Wellcome 101092/Z/13/Z to Kristine Krug.

National Institutes of Health R01MH118534 to Longchuan Li. National Institutes of Health P50MH100029 to Longchuan Li. National Institutes of Health R01MH118285 to Longchuan Li.

Keywords:

  • Science & Technology
  • Life Sciences & Biomedicine
  • Biology
  • Life Sciences & Biomedicine - Other Topics
  • Middle longitudinal fasciculus
  • In-VIVO
  • Diffusion tractography
  • Language
  • Areas
  • Connectivity
  • Brain
  • Chimpanzees
  • Evolution
  • Humans

Cross-species cortical alignment identifies different types of anatomical reorganization in the primate temporal lobe

Journal Title:

eLife

Volume:

Volume 9

Publisher:

Type of Work:

Article | Final Publisher PDF

Abstract:

Evolutionary adaptations of temporo-parietal cortex are considered to be a critical specialization of the human brain. Cortical adaptations, however, can affect different aspects of brain architecture, including local expansion of the cortical sheet or changes in connectivity between cortical areas. We distinguish different types of changes in brain architecture using a computational neuroanatomy approach. We investigate the extent to which between-species alignment, based on cortical myelin, can predict changes in connectivity patterns across macaque, chimpanzee, and human. We show that expansion and relocation of brain areas can predict terminations of several white matter tracts in temporo-parietal cortex, including the middle and superior longitudinal fasciculus, but not the arcuate fasciculus. This demonstrates that the arcuate fasciculus underwent additional evolutionary modifications affecting the temporal lobe connectivity pattern. This approach can flexibly be extended to include other features of cortical organization and other species, allowing direct tests of comparative hypotheses of brain organization.

Copyright information:

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This is an Open Access work distributed under the terms of the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/).
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