Cited by 734Neurobiology of Language and BilingualismLanguage Development and DisordersNeuroscience and Music Perception

The brain differentiates human and non-human grammars: functional localization and structural connectivity.

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Friederici, Angela D., Bahlmann, Jörg, Heim, Stefan, Schubotz, Ricarda I., Anwander, Alfred·2006·Proceedings of the National Academy of Sciences

Abstract

The human language faculty has been claimed to be grounded in the ability to process hierarchically structured sequences. This human ability goes beyond the capacity to process sequences with simple transitional probabilities of adjacent elements observable in non-human primates. Here we show that the processing of these two sequence types is supported by different areas in the human brain. Processing of local transitions is subserved by the left frontal operculum, a region that is phylogenetically older than Broca’s area, which specifically holds responsible the computation of hierarchical dependencies. Tractography data revealing differential structural connectivity signatures for these two brain areas provide additional evidence for a segregation of two areas in the left inferior frontal cortex.

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Crossref · 10.1073/pnas.0509389103

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  • The deep frontal operculum was shown to be segregated from the inferior frontal gyrus during processing of syntactic sequences.

    “In addition, the deep frontal operculum was shown to be segregated from the inferior frontal gyrus during processing of syntactic sequences [25].”

    From Broca's Region: Novel Organizational Principles and Multiple Receptor Mapping (2010) · cites this paper as [25]

    The Functional Imaging Results and Discussion report that the frontal operculum and Broca’s area (BA 44/45) respond differently to grammatical sequences. This supports functional differentiation, but the paper does not show the operculum segregated from the inferior frontal gyrus as a whole; it describes Broca’s area as the comparison region. (LLM, conf=0.82)

    Experimental — accuracy not yet measured
  • Functional representations of hierarchically and nonhierarchically structured sentences correlate with the clustering based on receptor architecture.

    “Indeed, functional representations of hierarchically and nonhierarchically structured sentences [25] correlate with the clustering based on receptor architecture:”

    From Broca's Region: Novel Organizational Principles and Multiple Receptor Mapping (2010) · cites this paper as [25]

    The Discussion (page not available) reports different activation patterns for hierarchical and local sequences in BA 44/45 and the frontal operculum. But the paper does not establish a correlation with receptor-based clustering: its introductory discussion says the frontal operculum remains to be specified receptorarchitectonically. (LLM, conf=0.88)

    Experimental — accuracy not yet measured
  • The deep frontal operculum (where op8 and op9 are located) was activated during the processing of nonhierarchically and hierarchically structured sequences.

    “Whereas the deep frontal operculum (where op8 and op9 are located) was activated during the processing of nonhierarchically and hierarchically structured sequences, areas 44 and 45 were only activated during the processing of hierarchically structured sequences that mimicked the structure of syntactically complex sentences in natural languages [25].”

    From Broca's Region: Novel Organizational Principles and Multiple Receptor Mapping (2010) · cites this paper as [25]

    The Discussion reports frontal operculum involvement for both grammar types and BA 44/45 activation for hierarchically structured sequences. Our copy does not identify op8 or op9 as locations within the operculum, so the parenthetical anatomical detail is not supported by this source. (LLM, conf=0.84)

    Experimental — accuracy not yet measured
  • Areas 44 and 45 were only activated during the processing of hierarchically structured sequences that mimicked the structure of syntactically complex sentences in natural languages.

    “Whereas the deep frontal operculum (where op8 and op9 are located) was activated during the processing of nonhierarchically and hierarchically structured sequences, areas 44 and 45 were only activated during the processing of hierarchically structured sequences that mimicked the structure of syntactically complex sentences in natural languages [25].”

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Research works printed but not linked: 4

  1. [10]10. Mazziotta, J. C. & Toga, A. (Elsevier, San Diego), pp. 573-602.
  2. [13]13. Johansen-Berg, H., Behrens, T. E. J., Robson, M. D., Drobnjak, I., Rushworth, M. F. S., Brady, J. M., Smith, S. M., Higham, D. J. & Matthews, P. M. (2004) Proc. Natl. Acad. Sci. USA 101, 13335-13340.
  3. [28]28. Talairach, P. & Tournoux, J., eds. (1988) A Stereotactic Coplanar Atlas of the Human Brain (Thieme, Stuttgart, Germany).
  4. [49]49. Thatcher, R. W., John, E. R. & Hallett, M. (Academic, San Diego), pp. 79-93.

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Authors
Friederici, A. D., Bahlmann, J., Heim, S., Schubotz, R. I., & Anwander, A.
Affiliations
  • Max Planck Institute for Human Cognitive and Brain Sciences (DE)
  • Forschungszentrum Jülich (DE)
  • Max Planck Society (DE)
Venue
Proceedings of the National Academy of Sciences
Published
2006-02-06
Volume
103
Issue
7
Pages
2458-2463
ISSN
  • 0027-8424 (ISSN-L)
  • 1091-6490
OpenAlex
W2119345145
Cited by
734
References
51
Citations by year
2026: 10 · 2025: 14 · 2024: 14 · 2023: 19 · 2022: 34 · 2021: 24 · 2020: 66 · 2019: 36 · 2018: 29 · 2017: 54 · 2016: 26 · 2015: 89 · 2014: 36 · 2013: 27 · 2012: 43
FWCI
20.87
Type
journal article
Language
en
Open access
Locations
  • Proceedings of the National Academy of Sciences (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed (publishedVersion)
  • MPG.PuRe (Max Planck Society) (submittedVersion, other-oa)
  • Max Planck Institute for Plasma Physics (submittedVersion)
  • Max Planck Digital Library (submittedVersion, other-oa)
  • JuSER (Forschungszentrum Jülich) (submittedVersion, other-oa)
  • MPG.PuRe (Max Planck Society) (submittedVersion)
Topics
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Neurobiology of Language and Bilingualism
  • Social Sciences › Psychology › Developmental and Educational Psychology › Language Development and Disorders
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Neuroscience and Music Perception
Keywords
human language, Broca's area, structural connectivity, functional localization, non-human primates, transition probabilities, hierarchical dependencies, inferior frontal cortex, language evolution
MeSH terms
Adult, Behavior, Brain Mapping, Female, Frontal Lobe, Humans, Language, Magnetic Resonance Imaging, Male

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