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Distinct Functional Connectivity Patterns of Brain Networks Involved in Motor Planning Underlie Verbal and Spatial

Emilie Marti1, Sélim Yahia Coll1, Naz Doganci1,2

  • 1Faculty of Medicine, University of Geneva, Geneva, Switzerland.

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Brain regions involved in motor planning contribute to working memory (WM). Distinct functional connectivity patterns support verbal and spatial WM, highlighting the role of sensorimotor areas in executive functions.

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N‐back taskfunctional connectivitymotor planningresting‐state fMRIworking memory

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Area of Science:

  • Neuroscience
  • Cognitive Neuroscience
  • Neuroimaging

Background:

  • Frontoparietal networks (FPN) are crucial for high-level cognitive functions like working memory (WM).
  • A hypothesis suggests these cognitive functions evolved from fundamental motor abilities.
  • The specific contribution of sensorimotor FPN regions to executive WM components and its modality dependence is not well understood.

Purpose of the Study:

  • To investigate the role of FPN regions, known for motor planning, in working memory (WM).
  • To determine if the contribution of these sensorimotor regions to WM is task-modality dependent.

Main Methods:

  • Resting-state functional connectivity (rs-FC) analyses were employed.
  • Sixty healthy individuals participated in the study.
  • Associations between N-back task performance (verbal and spatial) and rs-FC of frontoparietal motor planning regions were examined.

Main Results:

  • Verbal WM showed stronger connectivity between the left medial superior frontal gyrus and bilateral inferior parietal lobule (IPL), and the right IPL and left superior parietal lobule.
  • Spatial WM was associated with stronger connectivity between the right middle frontal and inferior temporal gyrus, and the left occipital pole and postcentral gyrus.
  • Distinct functional connectivity patterns were observed for verbal and spatial WM tasks.

Conclusions:

  • Findings demonstrate distinct functional connectivity patterns for verbal and spatial working memory.
  • Brain regions integral to motor planning contribute to modality-specific WM processes, including information updating.