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Incidental Verbal Semantic Processing Recruits the Fronto-temporal Semantic Control Network.

Z Jedidi1,2, M Manard1, E Balteau1

  • 1GIGA - Cyclotron Research Centre in vivo imaging, University of Liège, 4000 Liège, Belgium.

Cerebral Cortex (New York, N.Y. : 1991)
|June 28, 2021
PubMed
Summary
This summary is machine-generated.

This study reveals that the frontoparietal semantic network supports implicit semantic processing, even when attention is diverted. This network, including frontal and temporal areas, is active during incidental semantic control.

Keywords:
IFGincidentalpMTGrepetition suppressionsemantic control

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Area of Science:

  • Neuroscience
  • Cognitive Psychology
  • Psycholinguistics

Background:

  • The frontoparietal semantic network, including the inferior frontal gyrus and posterior middle temporal cortex, is implicated in semantic control.
  • The distinction between explicit and implicit semantic control processes is not well understood.

Purpose of the Study:

  • To investigate whether the frontoparietal semantic network engages in implicit semantic processing.
  • To examine brain responses to semantic attributes of unattended auditory words during a demanding visual task.

Main Methods:

  • Functional magnetic resonance imaging (fMRI) response adaptation paradigm.
  • Assessed brain responses to semantic attributes of unattended auditory words.
  • Participants engaged in a demanding visual search task to occupy attentional control.

Main Results:

  • Implicit semantic processing of unattended words activated unimodal and amodal cortices in posterior semantic knowledge areas.
  • Activation was also observed in inferior frontal and posterior middle temporal areas, part of the semantic control network.
  • Frontotemporal semantic networks demonstrated involvement in incidental semantic control processes.

Conclusions:

  • The frontoparietal semantic network supports incidental semantic processing, even when stimuli are unattended.
  • These findings suggest that semantic control networks are engaged in implicit semantic operations.
  • The study sheds light on the nature of semantic control, highlighting its role in implicit processes.