Research
Print page Print page
Switch language
The Capital Region of Denmark - a part of Copenhagen University Hospital
Published

Uncovering the inferior fronto-occipital fascicle and its topological organization in non-human primates: the missing connection for language evolution

Research output: Contribution to journalJournal articleResearchpeer-review

  1. Ex vivo diffusion-weighted MRI tractography of the Göttingen minipig limbic system

    Research output: Contribution to journalJournal articleResearchpeer-review

  2. Brain resting-state connectivity in the development of secondary hyperalgesia in healthy men

    Research output: Contribution to journalJournal articleResearchpeer-review

  3. Topological principles and developmental algorithms might refine diffusion tractography

    Research output: Contribution to journalReviewpeer-review

  4. The number of neurons in specific amygdala regions is associated with boldness in mink: a study in animal personality

    Research output: Contribution to journalJournal articleResearchpeer-review

  1. On the cortical connectivity in the macaque brain: a comparison of diffusion tractography and histological tracing data

    Research output: Contribution to journalJournal articleResearchpeer-review

  2. Functional and Structural Plasticity Co-express in a Left Premotor Region During Early Bimanual Skill Learning

    Research output: Contribution to journalJournal articleResearchpeer-review

  3. Streamline tractography for 3D mapping of axon bundle organization in one MRI voxel using ultra-high resolution synchrotron radiation imaging

    Research output: Chapter in Book/Report/Conference proceedingConference abstract in proceedingsResearchpeer-review

  4. The impact of axon orientation dispersion and 3D diameter variations on the transverse apparent diffusion coefficient

    Research output: Chapter in Book/Report/Conference proceedingConference abstract in proceedingsResearchpeer-review

  • Silvio Sarubbo
  • Laurent Petit
  • Alessandro De Benedictis
  • Franco Chioffi
  • Maurice Ptito
  • Tim B Dyrby
View graph of relations

Whether brain networks underlying the multimodal processing of language in humans are present in non-human primates is an unresolved question in primate evolution. Conceptual awareness in humans, which is the backbone of verbal and non-verbal semantic elaboration, involves intracerebral connectivity via the inferior fronto-occipital fascicle (IFOF). While non-human primates can communicate through visual information channels, there has been no formal demonstration that they possess a functional homologue of the human IFOF. Therefore, we undertook a post-mortem diffusion MRI tractography study in conjunction with Klingler micro-dissection to search for IFOF fiber tracts in brain of Old-World (vervet) monkeys. We found clear and concordant evidence from both techniques for the existence of bilateral fiber tracts connecting the frontal and occipital lobes. These tracts closely resembled the human IFOF with respect to trajectory, topological organization, and cortical terminal fields. Moreover, these fibers are clearly distinct from other bundles previously described in this region of monkey brain, i.e., the inferior longitudinal and uncinate fascicles, and the external and extreme capsules. This demonstration of an IFOF in brain of a species that diverged from the human lineage some 22 millions years ago enhances our comprehension about the evolution of language and social behavior.

Original languageEnglish
JournalBrain structure & function
Volume224
Issue number4
Pages (from-to)1553-1567
Number of pages15
ISSN0177-5154
DOIs
Publication statusPublished - May 2019

    Research areas

  • Brain connectivity, Inferior fronto-occipital fascicle, Klingler dissection, Monkey anatomy, Tractography, White matter

ID: 56781662