Cited by 133Reading and Literacy DevelopmentNeurobiology of Language and BilingualismFunctional Brain Connectivity Studies

Effective connectivity of the left BA 44, BA 45, and inferior temporal gyrus during lexical and phonological decisions identified with DCM

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Heim, Stefan, Eickhoff, Simon B., Ischebeck, Anja K., Friederici, Angela D., Stephan, Klaas E., Amunts, Katrin·2009·Human Brain Mapping

Abstract

Distinct regions in the left inferior frontal gyrus (IFG) preferentially support the processing of different word‐types (e.g., real words, pseudowords) and tasks (e.g., lexical decisions, phonological decisions) in visual word recognition. However, the functional connectivity underlying the task‐related specialisation of regions in the left IFG is not yet well understood. In this study we investigated the neural mechanisms driving the interaction of WORD‐TYPE (real word vs. pseudoword) and TASK (lexical vs. phonological decision) in Brodmann's area (BA) 45 in the left IFG using dynamic causal modelling (DCM). Four different models were compared, all of which included left BA44, left BA45, and left inferior temporal gyrus (ITG). In each model, the visual presentation of words and pseudowords is assumed to directly evoke activity in the ITG and is then thought to be subsequently propagated to BA45 and to BA44 via direct intrinsic connections. The models differed with regard to which connections were modulated by the different tasks. Both tasks were assumed to either modulate the ITG_BA45 connection (Model #1), or the BA44_BA45 connection (Model #2), or both connections in parallel (Model #3). In Model #4 lexical decisions modulated the ITG_BA45 connection, whereas phonological decisions modulated the BA44_BA45 connection. Bayesian model selection revealed a superiority of Model #1. In this model, the strength of the ITG_BA45 connection was enhanced during lexical decisions. This model is in line with the hypothesis that left BA 45 supports explicit lexical decisions during visual word recognition based on lexical access in the ITG. Hum Brain Mapp, 2009. © 2007 Wiley‐Liss, Inc.

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  • Probabilistic cytoarchitectonic atlases, such as the anatomy toolbox in SPM, can provide anatomical constraints that complement functional criteria in choosing regional time series.

    “Here, probabilistic cytoarchitectonic atlases, such as the anatomy toolbox in SPM (Eickhoff et al., 2005), can provide anatomical constraints that complement functional criteria (see section entitled Optimize experimental design and data acquisition) in choosing regional time series; for concrete examples, see Heim et al. (2009) and Stephan et al. (2007b).”

    From Ten simple rules for dynamic causal modeling (2010) · cites this paper as Heim et al., 2009

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Authors
Heim, S., Eickhoff, S. B., Ischebeck, A. K., Friederici, A. D., Stephan, K. E., & Amunts, K.
Affiliations
  • Forschungszentrum Jülich (DE)
  • Innsbruck Medical University (AT)
  • Max Planck Society (DE)
  • Wellcome Centre for Human Neuroimaging (GB)
Venue
Human Brain Mapping
Publisher
Wiley
Published
2009-01-19
Volume
30
Issue
2
Pages
392-402
ISSN
  • 1065-9471 (ISSN-L)
  • 1097-0193
OpenAlex
W2123906933
Cited by
133
References
49
Citations by year
2026: 4 · 2025: 3 · 2024: 1 · 2023: 4 · 2022: 3 · 2021: 7 · 2020: 4 · 2019: 9 · 2018: 5 · 2017: 4 · 2016: 9 · 2015: 12 · 2014: 6 · 2013: 13 · 2012: 5
FWCI
17.78
Type
journal article
Language
en
Open access
Locations
  • Human Brain Mapping (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • Max Planck Institute for Plasma Physics (submittedVersion)
  • Max Planck Digital Library (submittedVersion)
  • JuSER (Forschungszentrum Jülich) (submittedVersion)
  • RWTH Publications (RWTH Aachen) (submittedVersion)
  • MPG.PuRe (Max Planck Society) (submittedVersion)
Topics
  • Social Sciences › Psychology › Developmental and Educational Psychology › Reading and Literacy Development
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Neurobiology of Language and Bilingualism
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Functional Brain Connectivity Studies
Keywords
effective connectivity, left inferior frontal gyrus, Brodmann area 44, Brodmann area 45, inferior temporal gyrus, lexical decision, visual word recognition, pseudowords, dynamic causal modeling, Bayesian model selection
MeSH terms
Adult, Bayes Theorem, Decision Making, Dominance, Cerebral, Efferent Pathways, Female, Frontal Lobe, Humans, Language, Language Tests, Magnetic Resonance Imaging, Male, Pattern Recognition, Visual, Phonetics, Photic Stimulation, Reading, Symbolism, Temporal Lobe, Verbal Behavior, Young Adult

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